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Project overview​

Industry: agricultural
Product:
  • grain
  • malt
  • barley
Problem:
  • the need for an aspiration system for the operation of the separator
  • explosion hazard
Technological equipment:
  • separator
Our services and equipment:
  • bag filter cyclones TAMA CNSB-TI
  • rotary valves
  • commissioning

Some technological equipment at an grain storage cannot operate without an dust collection system, and the quality of its operation depends on the quality of the technological equipment. The separator dust collection system is a process filtration system and requires the highest quality and reliability of equipment.

We installed an dust collection system, which ensured high efficiency and high-quality operation of the separator.

Applied solutions and equipment

Filtration: the used cyclone bag filter CNSB-TI, thanks to cyclone type preseparation, ensures high filtration efficiency and long service life of the filter elements. A stable pressure drop in the filter ensured stable operation of the separator.

Performance: Cyclonic preseparation system and high quality filter elements provide 99.99% filtration rate and <10 mg/m3 emissions.

Safety: the dust collection system is designed in full compliance with current ATEX explosion protection standards and guarantees safety in the event of a dust explosion.

Advantages

process filtration, Взрывозащита аспирационного фильтра

Explosion protection

The installation of VMP explosionvinting panels with an explosion vent duct ensured the safety of equipment and personnel in the event of a dust explosion.

process filtration,

Continuous operation

The regenerating system for filter elements with compressed air, by controlling the pressure drop, allows you to operate the filter 24/7/365.

process filtration,

Long life bags

The design of the filter cyclone ensures cyclonic preseparation, which gives a long service life of the filter elements.

Project photo

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]]> Explosion protection of dust collection systems https://tbs-industry.com/en/articles/explosion-protection-dust-collection/ Tue, 09 Apr 2024 16:34:46 +0000 https://tbs-industry.com/?p=11351

Explosion protection of dust collection systems

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The purpose of this article is to familiarize you with the strategy and regulations for explosion protection of dust collection systems.

In recent years, special attention has been focused on reducing the risks of explosive dust/gas explosions and preventing accidents at industrial enterprises. In this regard, the following documents establishing requirements for explosion protection systems have entered into force:

  1. Directive 1999/92/EC Minimum requirements for the safety and health of workers potentially exposed to risk in explosive atmospheres;
  2. Directive 2014/34/EU “On the approval of the Technical Regulation of equipment and protective systems intended for work in a potentially explosive environment.”

Does your company effectively manage the risks associated with working with a potentially explosive product, are you familiar with the requirements of current legislation?

Взрывозащита систем аспирации, Захист від вибуху систем аспірації

Explosive zone

Взрывозащита систем аспирации, Захист від вибуху систем аспірації

Releasing the explosion pressure

Where to start?
The employer must comply with all requirements specified in Directive 1999/92/EC. These are the minimum requirements for occupational safety and health protection of personnel working at enterprises with a potentially explosive product. The employer must comply with the requirements of this Directive and apply the specified safety measures. The business must have "Explosion Protection Documentation", which will describe the strategy and explosion protection measures are necessary.

Problems of the danger of dust explosion in dust collection systems

The dust collection system is designed to remove dust from technological processes, separate solid particles from the air using a filter and discharge dust from the filter into a storage bin or transportation system.

If the production processes a potentially explosive product, then in the dust collector we get the highest concentration of explosive dust and a high risk of explosion.

The principle of operation of the dust collector is that dust is separated from the air with the help of filter elements that accumulate a large amount of dust on their surface, in addition, there is always a cloud of explosive dust inside the filter due to the constant pulling of dust into the filter. When cleaning the filter elements, a pulse of compressed air is blowing to the filter element, which discharges dust from the filter elements into the dust hopper, from which the dust is discharged by a rotary valve. At the time of cleaning the filter elements, the highest concentration of explosive dust is formed inside the filter unit in a suspended state.

Взрывозащита систем аспирации, Захист від вибуху систем аспірації

Dust collector operation

Взрывозащита систем аспирации, Захист від вибуху систем аспірації

Bag cleaning

Why does a dust explosion occur?

explosion protection of dust collection system, Explosion pentagon

As in other technological processes, an explosion in a dust collector occurs with the simultaneous presence of the following factors:

  • Oxygen;
  • Confinement (enclosed equipment space);
  • Fuel (combustible dust);
  • Ignition source;
  • Fuel mixing (dust-air mixture in concentration LEL <…< UEL)

Oxygen + fuel + ignition source = combustion
Oxygen + fuel + ignition source + fuel mixing = flash
Oxygen + fuel + ignition source + fuel mixing + confinement = explosion

LEL – is the minimum dust concentration (g/m3) at which an explosion can occur.
UEL – is the maximum dust concentration (g/m3) at which an explosion cannot occur.

Система придушення вибуху. Взрывозащита систем аспирации,

< LEL

Система придушення вибуху. Взрывозащита систем аспирации,

> UEL

Система придушення вибуху. Взрывозащита систем аспирации,

LEL ≤ ... ≤ UEL

Ignition sources

According to EN 1127-1, there are 13 possible ignition sources:
  • Hot surfaces;
  • Flames and hot gases (including hot particles);
  • Sparks of mechanical origin;
  • Electrical equipment;
  • Stray currents;
  • Static electricity;
  • Lightning;
  • Electromagnetic waves from 10^4 Hz to 3*10^12 Hz;
  • Electromagnetic waves from 3*10^12 Hz to 3*10^15 Hz;
  • Ionizing radiation;
  • Ultrasound;
  • Adiabatic compression and shock waves;
  • Exothermic reactions, including self-ignition of dust.

Based on official statistics, dust collection systems are the most dangerous equipment in the enterprise in terms of the probability of explosion, so when designing a dust collection system to work with a potentially explosive product, do not forget about the need for explosion protection of dust collectors and explosion isolation systems.

Statistics of explosions

Processes

Industry

Note: Information from open sources Dust Safety Science.

An explosion in the dust collection system leads to catastrophic consequences

Methodology for determining requirements for explosion protection of dust collection systems

* See Table 1

◊ See Table 2

Table 1

EX area
in the place of installation of the dust collector		 Protection of external components of the dust collector
Safe
Not required
Zone 22
Ex CAT 3D
Zone 21
Ex CAT 2D
Zone 2
Ex CAT 3G
Zone 1
Ex CAT 2G

Note: additional requirements for the protection of the external components of the filter, to be determined according to the results of tests of dust explosion parameters.

The explosion hazard of the equipment installation zone must be determined according to Hazardous area classification (EN 60079-10-2).

Table 2

Type Installation in Ex Zone Protect according to EN requirements Can safely handle a potentially explosive product Protect according to
Type-1
No
Not required
No
Not required
Type-2
No
Not required
Yes
EN 14491
Explosion venting
EN 15089
Explosion isolation
Type-3
Yes
Ex CAT 3GD / 2GD
No
Not required
Type-4
Yes
Ex CAT 3GD / 2GD
Yes
EN 14491
Explosion venting
EN 15089
Explosion isolation

Short description of systems:

Type 1 – the system is not intended for work with potentially explosive dust and is not intended for installation in an explosive zone;

Type 2 – the system is designed to work with potentially explosive dust, but cannot be installed in an explosive zone;

Type 3 – the system is not intended for work with potentially explosive dust and can be installed in an explosive zone;

Type 4 – the system is designed to work with potentially explosive dust and can be installed in an explosive zone.

Other requirements for the safe operation of a dust collection system with explosive dust:
  • Antistatic or grounded filter elements;
  • Grounding of air ducts;
  • Filter grounding;
  • Inspection hatches, service doors must withstand the residual pressure of the Pred explosion not lower than the resistance of the filter housing;
  • If the filter elements do not withstand the residual pressure of the Pred, the full volume of the filter is taken into account when calculating the blast release area, not just the dirty side. Also, when returning air to the room, it is necessary to install an explosion isolation system or a flame filter on the duct for returning air to the room.

Options for explosion protection of dust collection systems

№ Description of components Type
Explosion protection of the dust collector
1
VMP venting panel
Explosion venting
Mechanical
Passive
2
Flex Flameless venting device
Explosion flameless venting
Mechanical
Passive
3
HRD system
Explosion suppression
Chemical
Active
Explosion isolation
4
B-Flap Explosion Isolation flap valve
Explosion isolation
Mechanical
Passive
5
HRD barrier
Chemical explosion isolation
Chemical
Active
6
Flame Proof rotary valve
Mechanical explosion isolation
Mechanical
Passive
Захист від вибуху систем аспірації. Взрыв пыли в системе аспирации, без взрывозащиты. Защита от взрыва систем аспирации

According to the mechanism of action, explosion protection systems are divided into 2 main types:

Passive – a protective system that is activated due to the pressure caused by an explosion, or is designed in such a way that the flame does not pass through it. For example, the rupture of the venting panel due to a pressure jump, the closing of the check valve flap with the help of a pressure wave. Or structural, such as gaps between the rotor and valve stators that an explosion cannot pass through, or a flame arrester mesh that does not allow flames to pass through.

Active – is a protective system that, with the help of a sensor, monitors the beginning of an explosion in the equipment (pressure surge or flash), sends a signal to the controller, which analyzes the sensor indicators, and in the event of an explosion, sends a signal to activate the explosion protection (closing dampers, cylinder activation).

Also, explosion protection systems are divided according to the principle of action:

Mechanical – protects the equipment in a mechanical way: membrane rupture, shutter closing, isolation due to MESG (Minimum Experimental Safe Gap).

Chemical – protects equipment by spraying a reagent.

Description of explosion protection methods in dust collection systems

Any of the described explosion protection methods consists in reducing the pressure inside the technological equipment to a pressure below the equipment’s resistance (Pred), so that in the event of an explosion, the equipment remains undamaged and the explosion occurs predictably and safely. Of course, an explosion can be completely safe only in combination with explosion isolation systems, the correct selection of the protection method and the size of the protective device.
Any of the following explosion protection methods can be combined with each other in any way convenient for you.

1. Venting panel VMP - explosion pressure relief

розрівні мембрани скидання тиску вибуху, разрывные мембраны сброса давления взрыва. venting panel

Venting panel is an explosion pressure relief valve that is installed on the dust collector, usually below the filter elements. The venting panel is the weak point of the filter housing and in the event of an explosion it ruptures and releases excess pressure from the filter, thus the filter housing remains undamaged.

Захист від вибуху систем аспірації

The rupture membrane is usually installed on the dust collector, which is installed outside, where it is possible to release the explosion into a safe area. When designing, do not forget to take into account the length (Lf) and width (Wf) of the flame opposite the venting panel.
Note that the recommended place for installing the venting panel is to install it under the filter elements. Installing a vent panel opposite the filter elements will prevent the blast pressure from freely venting, resulting in ineffective pressure venting and damage to the filter housing.

Schedule of pressure increase in the equipment in the presence and absence of an explosion relief venting panel

Graph of dust explosion pressure

Explosion venting – the pressure curve inside the equipment, in the presence of a venting panel for the explosion pressure relief;

Without explosion protection – pressure curve inside the equipment, without explosion protection;

Pstat – venting panel rupture pressure (usually equal to 0.1 bar);

Pred – residual pressure in the equipment, after explosion venting;

Pes – resistance of equipment to pressure;

Pmax – maximum explosion pressure (depends on the type of potentially explosive product).

Examples of explosion protection of dust collection systems by venting panel

2. Flex flameless venting device - flameless release of explosion pressure

Пламегасители Flex - для взрывозащиты оборудования

Flex flameless venting device is equipped with a flame filter that filters the flame and resets the explosion from the dust filter is completely safe for equipment and personnel, the explosion can be release even indoors.
Since the component of the Flex is the venting panel, which is installed on the body of the dust collector, the principle of explosion protection of the equipment with the flameless venting device is completely similar to the protection by the venting panel, as described above.

It is installed on dust collectors that are installed indoors or on the street, if the explosion from the venting panel cannot be release to a safe area where there will be no personnel and equipment that can be damaged. Please note that the recommended place to install the Flex is installation under the filter elements. Installation opposite the filter elements will prevent the explosion pressure from being released freely, resulting in ineffective pressure relief and damage to the filter.

Example of Flex flameless venting operation

Flex Взрывозащита пламегаситель Вибухозахист гасник полумя Explosion protection flameless
Flex Взрывозащита пламегаситель Вибухозахист гасник полумя Explosion protection flameless
Flex Взрывозащита пламегаситель Вибухозахист гасник полумя Explosion protection flameless

Examples of explosion protection of dust collection systems with Flex

3. HRD system - explosion suppression

explosion isolation, explosion suppression system, HRD система подавления взрыва. Система придушення вибуху. изоляция взрыва, ізоляція вибуху. методи ізоляції вибуху, ізоляція вибуху, вибухозахист, ДСТУ EN 15089, обмеження вибуху. методы изоляции взрыва, изоляция взрыва, взрывозащита, EN 15089, ограничение взрыва. explosion isolation methods, explosion isolation, explosion protection, EN 15089, explosion limitations.

Principle of operation explosion suppression system: the controller constantly evaluates the readings from the pressure/optical sensor, in case of detection pressure jump or flash sensor, the controller registers this and sends a signal to activate the HRD container, which sprays a powder inside the equipment through a nozzle that suppresses the explosion.

The HRD system is characterized by extremely fast introduction of fire extinguishing agent inside the equipment. Thanks to high-speed sensors, the HRD system suppresses an explosion in 60 milliseconds.

When the dust concentration is in the LEL…UEL range, an explosion occurs in the presence of an ignition source.

The principle of operation of the HRD explosion suppression system is to dilute the explosive concentration of dust by rapidly spraying the powder inside the process equipment, due to which the explosion is stopped at its early stage, when the explosion pressure is still in safe values for the equipment.

Visualization of explosion suppression by the HRD system

explosion isolation, explosion suppression system, Система подавления взрыва - источник воспламенения. Система ізоляції вибуху. Система придушення вибуху. Изоляция взрыва, ізоляція вибуху.

Time: 0 ms
Pressure: 0 bar

explosion isolation, explosion suppression system, Система подавления взрыва - взрыв. Система ізоляції вибуху, Система придушення вибуху. Изоляция взрыва, ізоляція вибуху.

5 - 35 ms
0,03 - 0,1 bar

explosion isolation, explosion suppression system, Система подавления взрыва - распыление порошка. Система ізоляції вибуху, Система придушення вибуху. Изоляция взрыва, ізоляція вибуху.

40 ms
0,08 - 0,15 bar

explosion isolation, explosion suppression system, Система подавления взрыва - взрыв подавлен. Система ізоляції вибуху, Система придушення вибуху. Изоляция взрыва, ізоляція вибуху.

60 ms
0,15 - 0,2 bar

Components of the HRD system

explosion isolation, explosion suppression system, CONEX - контроллер системы подавления взрыва

CONEX

The controller evaluates and records information from the sensors, sends a signal to activate the containers. Works as a user interface for staff.

explosion isolation, explosion suppression system, DexEx LumEx - датчик обнаружения взрыва

DETEX / LUMEX

Explosion detection sensor in 5-35 ms. This information is sent to the controller in 5 ms.

explosion isolation, explosion suppression system, HRD баллон - баллон подавления взрыва. Система ізоляції вибуху

HRD container

The HRD container is equipped with a quick-opening valve that sprays the powder into the protected equipment in 5 ms.

Telescopic nozzle

The nozzle is necessary to evenly spray the powder inside the equipment to suppress the explosion.

Examples of explosion protection of the dust collection system using HRD explosion suppression system

Description of explosion isolation methods in the dust collection system

In the event of an explosion in the dust collector, the explosion pressure and flame will not only be released through the venting panel, but will also spread through all possible openings in the filter, such as the inlet pipe and the dust discharge hole. To protect the equipment connected to the dust collector, it is necessary to use explosion isolation, which localizes the explosion in the dust filter.

4. B-Flap check valve - explosion isolation

explosion isolation, Обратный клапан B-Flap, изоляция взрыва, ізоляція вибуху, explosion isolation. методи ізоляції вибуху, ізоляція вибуху, вибухозахист, ДСТУ EN 15089, обмеження вибуху. методы изоляции взрыва, изоляция взрыва, взрывозащита, EN 15089, ограничение взрыва. explosion isolation methods, explosion isolation, explosion protection, EN 15089, explosion limitations.

B-Flap Explosion Isolation Valve is a mechanical device that is activated due to the explosion pressure wave . The pressure wave, which travels faster than the flame, closes the damper inside the valve, thus preventing the pressure and flame from spreading to the process equipment.

Installation options

B-Flap Explosion Isolation Check Valve Installation Examples

5. HRD barrier

explosion isolation, explosion suppression system, HRD система подавления взрыва. Система придушення вибуху. изоляция взрыва, ізоляція вибуху. методи ізоляції вибуху, ізоляція вибуху, вибухозахист, ДСТУ EN 15089, обмеження вибуху. методы изоляции взрыва, изоляция взрыва, взрывозащита, EN 15089, ограничение взрыва. explosion isolation methods, explosion isolation, explosion protection, EN 15089, explosion limitations.

The principle of operation of the HRD explosion isolation system: the controller constantly evaluates the readings of the optical sensor installed on the pipeline at inputs to the filter, in the case of detection of a flash by the sensor, the controller registers it and sends a signal to activate the HRD container, which sprays powder inside the pipeline through the nozzle, which isolates the spread of the flame through the pipeline.
The components of the HRD barrier are completely analogous to the HRD system:

  • ComEx controller;
  • LumEx sensor;
  • HRD container;
  • Telescopic nozzle.

Examples of HRD barrier installation

6. Flame Proof rotary valve

Роторный клапан, роторний клапан, шлюзовой затвор, шлюзовий живильник. методи ізоляції вибуху, ізоляція вибуху, вибухозахист, ДСТУ EN 15089, обмеження вибуху. методы изоляции взрыва, изоляция взрыва, взрывозащита, EN 15089, ограничение взрыва. explosion isolation methods, explosion isolation, explosion protection, EN 15089, explosion limitations.

Rotor valve certified according to EN 15089 works as an explosion isolation device in the gravity discharge of dust from the filter, which prevents the explosion from filter to bin or conveyors into which collected dust is unloaded. The rotary valve isolates the explosion due to the fact that the body is made of cast steel with high precision grooving of the body in which the rotor rotates, and the rotor is made of sheet steel. Due to this, a minimum gap between the housing and the rotor (MESG) is ensured, which in the event of an explosion does not allow pressure and flame to pass through it.

Examples of rotary valve installation
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for your technological process
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Our projects

]]> Dust collection from intake pit https://tbs-industry.com/en/projects-en/dust-collection-intake-pit/ Tue, 17 Oct 2023 08:47:58 +0000 https://tbs-industry.com/?p=10710

Project overview

Industry: agricultural
Product:
  • grain
  • malt
  • barley

Problem:
  • release of a large amount of dust during the unloading of cars
  • explosiveness

Technological equipment:
  • intake pit
Our services and equipment:
  • dust collection intake pit filter TAMA NS-FS
  • commissioning

The technological line of any grain storage begins with intake pit, from truck or rail transport. In the process of unloading the transport, a large amount of harmful, explosive dust is released.

We have installed dust collection system for intake pits, based on dust collecting walls, which allows you to effectively remove dust released during the unloading of transport.

Solutions and equipment used:

Filtration: Intake pit filter enable efficient dust removal and return dust to the intake pit, eliminating product weight loss.

Safety: The removal of explosive dust from the reception area reduced the potentially explosive zone from Zone 21 to Zone 22. The reduction of the explosive zone allowed the installation of ATEX CAT 3D electrical components, which greatly reduced the cost of electrical components and the potential for dust explosions.

Advantages:

Efficiency: qualified calculation of aerodynamic air flows allowed to effectively remove dust with low performance of the fan.

Safety: the reduction of the explosive zone has reduced the risk of dust explosion.

Ecology: the dust collection system made it possible to improve working conditions for personnel and ensured emissions of <10 mg/m3.

Project photo

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for your technological process
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]]> Dust collection system for grain silos of a brewery https://tbs-industry.com/en/projects-en/dust-collection-brewery/ Fri, 13 Oct 2023 14:28:08 +0000 https://tbs-industry.com/?p=10727

Project overview

Industry: brewery

Product: malt, barley

Problem: low efficiency of existing aspiration systems

Technological equipment: separators, bucket elevators, chane conveyors

Services and equipment:

  • development of solutions
  • design
  • bag filter cyclones
  • fans
  • explosion protection
  • installation
  • commisioning

At the brewery, there was a problem of low efficiency of the existing aspiration system, which the customer wanted to completely replace with a new one. We developed the project, supplied the equipment, carried out chief assembly and commissioning works, thanks to which the customer received a modern filtration system and improved the quality of raw material purification.

Solutions and equipment used

Filtration: the best solution for filtering grain dust is a bag filter-cyclone, which ensures reliability and high efficiency of dust filtration.

Explosion protection: grain dust is an explosive material, VMP SU explosion pressure relief rupture membranes and B-Flap explosion isolation check valves are installed on aspiration filters, which ensured complete safety during the operation of aspiration systems. For aspiration systems installed indoors, we used Flex flame extinguishers, which allow you to safely release the explosion pressure indoors.

Automation: the automation of the aspiration system was fully integrated into the production management system, which fully automated the system management process.

Advantages

dust collection, explosion protection, Взрывозащита аспирационного фильтра, аспирация, аспірація

Explosion protection of bag filters

The installation of rupture membranes for the release of explosion pressure guarantees safety in the event of a dust explosion in the filter.

dust collection, explosion protection, аспирация, аспірація

Explosion protection of dust hopper

На бункери відходів встановлено вибухові двері PUSM, які дозволять захистити бункери в разі вибуху.

dust collection, explosion protection, аспирация, аспірація

Explosion isolation

B-Flap valves made it possible to protect adjacent equipment from the risks of flame spread and secondary explosions.

Project photo

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]]> Dust collection system in a food factory https://tbs-industry.com/en/projects-en/dust-collection-food/ Fri, 13 Oct 2023 13:54:27 +0000 https://tbs-industry.com/?p=10736

Project overview

Industry: food

Product: flour, sugar

Problem: dust emissions from mixers

Technological equipment: mixer

Services and equipment:

  • Development of solutions
  • Design
  • Cartridge filter
  • Fan
  • Explosion protection
  • Supervising 
  • Commissioning

Dust is a problem in every production facility that processes bulk materials. Our company has implemented a project for an dust collection system to remove dust from mixers.

Applied solutions and equipment:

Filtration: for high-quality filtration of fine, explosive dust, we chose a cartridge explosion-proof filter from TAMA. The filter elements are made of moisture-oil-repellent material.

Explosion protection: Since the dust is explosive and the filter is installed indoors, a Flex flame arrester and an explosion isolation valve were used as an explosion protection system. The combination of these two devices guarantees the safety of the system, personnel and adjacent equipment in the event of an explosion.

Advantages

Dust collection, explosion protection,

Flameless explosion venting

Flex flameless explosion venting allowed the explosion to be safely discharged into the room.

Dust collection, explosion protection,

Explosion Isolation

Isolation of explosions in the dust collection system from adjacent equipment is guaranteed thanks to the installation of a B-Flap explosion isolation check valve

Dust collection, explosion protection,

High filtration efficiency

Returning filtered air back into the room reduced the cost of ventilation and heating of the room.

Project photo

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for your technological process
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]]> Air belt dust collection system https://tbs-industry.com/en/projects-en/belt-dust-collection/ Fri, 13 Oct 2023 13:23:57 +0000 https://tbs-industry.com/?p=10774

Project overview

Industry: woodworking

Product: wood dust

Problem: the need for an aspiration system for the operation of the conveyor

Technological equipment: transportation

Services and equipment:

  • development of solutions
  • design
  • bag filter
  • fan
  • installation supervision
  • commissioning works

The features of some technological equipment require the presence of an aspiration system, without which it cannot work, and the quality of the technology depends on the quality of the aspiration system. Air chutes fall into this category of equipment.

Applied solutions and equipment

Filtration: During the operation of the conveyor, dust is released, which negatively affects its operation. We installed a bag filter with moisture-oil-repellent filter elements to remove dust from the conveyor.

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for your technological process
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]]> Dust collection at a pellet production https://tbs-industry.com/en/projects-en/dust-collection-pellet-production/ Fri, 13 Oct 2023 12:36:18 +0000 https://tbs-industry.com/?p=10766

Project overview

Industry: woodworking

Product: wood dust

Problem: the need for an aspiration system to ensure the operation of the technology and the cleanliness of production

Technological equipment: dryer, press, separator, receiving hopper

Services and equipment:

  • development of solutions
  • design
  • bag filter
  • fan
  • explosion protection
  • installation supervision
  • commissioning works

The features of some technological equipment require the presence of an aspiration system, without which it cannot work, and the quality of the technology depends on the quality of the aspiration system. In aspiration systems this is called process filtration.

When designing aspiration systems for process filtration, the quality, efficiency and reliability of the aspiration system are extremely important, since the operation of all technologies depends on this.

Solutions and equipment used

Filtration: dust released during wood processing has special properties and creates certain difficulties for classic aspiration filters; filters for the woodworking industry are not standard and have a number of features.

We chose a filter that was designed specifically for use in woodworking and has its own characteristics (read below).

Explosion protection: Wood dust is a potentially explosive product, so the filter has been equipped with explosion pressure relief membranes to ensure safety in the event of a dust explosion. To eliminate a source of ignition that could cause a dust explosion, antistatic filter elements are used in the filter.

The pellet production line is divided into technological sections that can operate both simultaneously and independently of each other. To save energy and filter life, the aspiration system was designed with one aspiration filter and six independent aspiration branches, which made it possible to turn on the aspiration system only in working technological areas. This solution made it possible to ensure a significant reduction in system energy consumption and a long service life of the filter elements.

Advantages

dust collection, explosion protection,

Cleaning with high pressure fans

The bag filter is equipped with a system for cleaning filter elements using high-pressure fans, which eliminated the need to connect compressed air. Operating such a system is significantly cheaper than compressed air regeneration systems.

dust collection, explosion protection,

Energy efficiency

The special design of the filter made it possible to install six independent duct line, which significantly reduced the energy consumption of the system and increased the filter service life.

dust collection, explosion protection,

Explosion protection

Explosion ventilation panels ensured the safety of the system in the event of a dust explosion.

dust collection, explosion protection,

Clean air

High-quality filter elements provide a residual emission concentration of 0.1 mg/m3 for wood dust.

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]]> Bag filter CNSB-TI for high-quality separator operation https://tbs-industry.com/en/projects-en/bag-filter-for-separator/ Tue, 18 Oct 2022 16:36:00 +0000 https://tbs-industry.com/?p=11734

Project overview​

Industry: agricultural

Product:
  • grain
  • malt
  • barley
  • rape

Problem:
  • the need for an aspiration system for the operation of the separator
  • risk of dust explosion

Technological equipment:
  • separator

Our services and equipment:

  • solution development
  • design
  • bag filter cyclone TAMA CNSB-TI
  • fans MZ Aspiratori
  • rotary valves
  • air ducts made of galvanized steel
  • installation work
  • commissioning
  • service

The Aspiration system is an integral part to ensure the operation of the separator. 

The aspiration system is an important and key factor for the operation of the separator. Such aspiration systems are usually called “process” filtration and special attention is paid when designing such aspiration systems, since poor performance or failure of the aspiration filter will lead to a complete stop of the separator and production.

The specialists of our company proposed for installation a bag filter cyclone, specially designed for aspiration systems in the grain industry, which has demonstrated the effectiveness of its work over years of successful use by our customers.

The installation of an explosion-proof aspiration filter TAMA CNSB-TI ensured efficient and uninterrupted operation of the separator, high grain quality and safe operation of the aspiration system.

Bag filter cyclones CNSB-TI, thanks to the tangential inlet, have cyclonic preseparation and reduce the dust load on the filter elements, which significantly increases the service life of the filter and reduces operating costs.

Advantages

фильтр циклон, фільтр циклон

Explosion protection

The installation of VMP venting panel with an explosion vent duct ensured safety for equipment and personnel in the event of a dust explosion.

Клапан системы регенерации фильтра

Ex CAT 3GD components

Installing Ex CAT 3GD valves and controller eliminates an excludes source that could lead to a dust explosion.

Рукавный фильтр, система аспирации, Рукавний фільтр, система аспірації, bag filter, dust collection system

Continuous operation

The system for regenerating filter bags with compressed air by controlling the pressure drop allows you to operate the filter 24/7/365 with savings in compressed air.

фильтр циклон, фільтр циклон

Long service life

The design of the bag filter cyclone ensures cyclonic preseparation, which gives a long service life of the filter elements.

фильтр циклон, фільтр циклон

Ease service

A complete platform for servicing the bag filter makes the service convenient and safe.

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]]> Flameless venting of bucket elevators https://tbs-industry.com/en/projects-en/flameless-venting-bucket-elevators/ Tue, 18 Oct 2022 16:35:58 +0000 https://tbs-industry.com/?p=10780

Project overview

Industry: agricultural

Product: grain dust

Risks: injury to personnel when releasing explosion pressure from elevators

Technological equipment: bucket elevator

Services and equipment:

  • explosion risk assessment
  • hazardous area classification
  • Flex flameless venting

We all know that during the processing and storage of grain, a large amount of explosive dust is released, and grain is a potentially explosive product. What is proven by tests carried out by research institutes and the explosion protection standards of equipment that have come into force.

During the construction of the grain storage, the investor decided to purchase only high-quality equipment made in Europe, which will comply with all current safety standards. During the installation work, the company’s engineers noticed that the explosion venting devices from the bucket elevators were brought to areas where personnel could be located and they doubted the safety of production. TBS INDUSTRY enginners visited the facility and make a complete inspection of the “dust explosion hazard assessment.”

During the inspection, it was revealed that the explosion pressure relief valves on bucket elevators are not certified in accordance with current ATEX standards and are located in personnel movement areas, as a result of which there is a high risk of serious injury to personnel.

Applied solutions and equipment

As the first step in bringing the enterprise into compliance with current standards, we proposed installing Flex R4 flame filter equipped with VMP D explosion venting device.

This decision brought the installed bucket elevators into full compliance with current legislation and made the release of explosion pressure completely safe for personnel.

The client accepted the proposals of our company’s specialists and installed the necessary explosion protection systems, since this was the most optimal solution to bring the enterprise into compliance with current standards and make it safe for personnel, as well as to reduce the possible consequences of a grain dust explosion to a minimum.

Output

Purchasing explosion-protected equipment does not exclude installation errors or operating features not taken into account during design. To eliminate the risks of explosion consequences, a comprehensive qualified inspection of the enterprise is required, which can be done by our specialists. We will carry out a “dust explosion hazard assessment” inspection and install the necessary explosion protection systems and will always be happy to help make your enterprise safe.

Advantages

Guaranteeing the safety of personnel and process equipment in the event of a dust explosion.

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]]> Dust collection system for seed plant https://tbs-industry.com/en/projects-en/dust-collection-system-seed-plant/ Tue, 18 Oct 2022 16:35:54 +0000 https://tbs-industry.com/?p=10790

Project overview

Industry: agricultural

Product: seeds, bulk materials

Problem: dust generation during seed processing, explosion risk 

Technological equipment: bucket elevators, belt conveyors, technological equipment

Services and equipment:

  • development of solutions
  • cyclone filter CNSB
  • MZ fan
  • rotary valve RV
  • B-Flap explosion isolation

During seed processing, dust is generated, which negatively affects the efficient operation of equipment and the health of personnel. We installed an dust collection system that solved all dust problems.

Advantages

Efficiency: installation of a filter-cyclone TAMA CNSB-TI made it possible to filter dust efficiently and ensure compliance with maximum permissible concentration standards, which improved the environment of the enterprise and solved all problems associated with dust in technological equipment.

Safety: Removing explosive dust from equipment has significantly reduced the likelihood of dust explosions, which has increased plant safety. But all the explosive dust was concentrated in the aspiration system, and these are high risks in the event of a dust explosion. That is why the aspiration system and all aspiration equipment were explosion-proof, to ensure complete safety of process equipment and plant personnel in the event of a dust explosion in the dust collection system.

General: Clean production is always nice.

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