Basic requirements for explosion-proof pulse valves in bag dust collectors

The bag dust collector is the main dust removal equipment in the field of industrial flue gas treatment. The flue gas it handles comes from various process sections of thermal power generation, steel metallurgy, waste incineration, cement and other enterprises. The flue gas has complex components and may contain explosive gases, explosive dust, fibers or flying catkins, or even all of them.

It is very important to use dust removal accessories with corresponding explosion-proof levels in the above-mentioned explosive environments.

The key to the explosion-proof technology of explosion-proof pulse valve (hereinafter referred to as 'explosion-proof valve') is to seal the electrical wiring part to isolate the arc, spark leakage and possible dangerous temperatures that may be generated by the instantaneous energization of the electromagnetic pilot part. In other words, the explosion protection of the pulse valve lies in the explosion protection of the solenoid head (electromagnetic coil).

Basic requirements for explosion-proof valves

Explosion-proof valves should meet the requirements of 'Explosive Environment Part 1: General Requirements for Equipment' (GB 3836.1-2010), 'Explosive Environment Part 2: Equipment Protected by Explosive Enclosure 'd'' (GB 3836.2-2010), 'Explosive Environment Part 9: Equipment Protected by Casting Type 'm'' (GB 3836.9-2014), 'Electrical Equipment for Combustible Dust Environments Part 1: General Requirements' (GB 12476.1-2013), 'Electrical Equipment for Combustible Dust Environments Part 5: Enclosure Protection Type 'tD'' (GB 12476.5-2013), 'Nitrogen Equipment for Combustible Dust Environments Part 6: Pouring Protection Type 'mD'' (GB 12476.6-2010) and other relevant standards, and on the basis of meeting the corresponding standard technical requirements of the electromagnetic pulse valve, the electromagnetic coil and terminal parts are explosion-proof to make them suitable for gas or dust explosive environments.