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Author:
Nikulin V, Head of Engineering
Nikulin V, Head of Engineering
Dust collection systems for explosive plant are specially engineered configurations with integrated explosion protection. They not only remove contaminants but also prevent the propagation of flames in case of fire.
Dust Collection Methods and Their Comparison
Dust collection can be achieved using either a wet or dry method. The wet method involves contacting the air with a liquid (usually water). This causes suspended particles to bind to the droplets or film of liquid and be removed as a sludge. This approach requires further processing—such as dewatering, filtration, or settling—for disposal or potential reuse.
The dry method does not involve liquids. Here, the dust remains dry and can be immediately recycled or disposed of as solid waste—which is often cheaper than managing liquid waste.
A brief comparison of the two methods is provided in Table 1.
The dry method does not involve liquids. Here, the dust remains dry and can be immediately recycled or disposed of as solid waste—which is often cheaper than managing liquid waste.
A brief comparison of the two methods is provided in Table 1.
An industrial enterprise requiring an explosion-protected baghouse filter
Table 1
Preparation of Technical Specifications for the Manufacturing of Explosion-Protected Filtration Equipment
Equipment Selection Tips
When selecting a plant dust collection system, it is important to consider several key factors: explosion hazard indicators (such as pressure rise rate, maximum confined explosion pressure, minimum ignition energy, and minimum explosive solids concentration); the physical properties of contaminants (including size, shape, abrasiveness), its chemical composition; and the temperature and humidity of the flow.
Based on these factors, a cleaning strategy—wet or dry—should be chosen. Once the strategy is selected, operational considerations must be taken into account. These include the dust discharge method (manual discharge may be suitable for small volumes, but automatic discharge is preferable in explosive environments), the filter type and the required explosion protection features.
Based on these factors, a cleaning strategy—wet or dry—should be chosen. Once the strategy is selected, operational considerations must be taken into account. These include the dust discharge method (manual discharge may be suitable for small volumes, but automatic discharge is preferable in explosive environments), the filter type and the required explosion protection features.
Explosion-protected baghouse filter by Torch-Air
Dust Collection System Types
The following dust collection for manufacturing plants can be used:
- Scrubbers – purification occurs through contact of emissions with a liquid (usually water).
- Cartridge airborne particle extraction – airborne particles is captured on the surface of filter cartridges.
- Baghouse contaminant filtration – solids is captured on fabric or felt sleeves; additional cleaning of the sleeves with compressed air pulses is required.
- Cyclones – dust separation occurs through centrifugal force. They are simple, durable, and have no moving parts.
- Adsorbers – designed to remove gases, vapors, and odors, not just solid particles. Activated carbon, which traps contaminants within its structure, is most often used as the adsorbent.
- Oil mist filters – used to capture oil mist and coolant emulsions, which often form as a result of mechanical processing.
Installation of a protected baghouse dust collector by Torch-Air
Requirements for Explosive Plants
Any dust collection systems for plant designed for explosive installations should include one or more of the following protection strategies:
- Ducts and panels that open to safely vent pressure and flames away from the work area;
- Isolation valves or mechanical barriers that close off ductwork to stop a deflagration from spreading to other areas or back to process equipment;
- Systems that detect an explosion at its inception and rapidly discharge a suppressant to extinguish it;
- Maintaining oxygen levels inside the equipment below the level required for combustion.
GIF animation of spark arrestor operation
Table 2
FAQ
- 1. We plan to install some of the equipment outdoors, but temperatures can drop to -30°C in winter. Which system is best?Only a dry collection method is suitable.
- 2. Which type of system consumes less energy?A cyclone.
- 3. Can a cyclone be used as a standalone cleaning system for explosive fine dust?No, only as a pre-collection stage.
- 4. We have fine dust, but it is highly abrasive. Which is better: a baghouse filter or a cartridge filter?A baghouse filter
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We always perform precise calculations and offer expert assistance in selecting the optimal dust collection or gas cleaning systems, typically completing this process within 1 to 2 days
Head of Engineering,
Vladimir Nikulin
Vladimir Nikulin
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