(2) Choose explosion-proof electrical equipment. The common structures are: explosion-proof, increased safety, positive pressure, sand-filled, intrinsically safe, and oil-filled (3) ventilation.
<br> <br> industrial processes in an industrial process, generally start from the following three aspects of the processing explosive situations.
1) Prevent or minimize the possibility of leakage of flammable substances;
2) Do not use or minimize the use of electrical components that easily produce sparks;
3) Use a nitrogen-filled method to maintain inertness.
<br> <br> design architectural design architectural design should rationally determine the requirements of explosion-proof buildings:
Explosion-proof lighting 1 building layers. It is generally advisable to use single-storey buildings. Multi-storey buildings can only be used for buildings that must take a bottom-up or top-down production process. In a multi-story building, if only one part is an explosion-proof room, it should be arranged on the top floor as far as possible, and it cannot be placed in a basement or a semi-basement. If the process of explosion protection is up and down through to the top floor, vent holes should be opened on each floor. The area should not be less than 15% of the floor area. Light pressure relief roofs should be used on the roof.
2 fire rating. Explosion often leads to fire. Explosion-proof buildings should have a high fire resistance rating: Single-story buildings are not less than two, and multi-storey buildings should be one.
3 type of structure. In order to prevent the collapse of the house caused by the explosion, the building should be equipped with an anti-explosive load-bearing structure and pressure relief measures should be taken. Reinforced concrete structures are generally used; if the walls are thick or the explosion-proof construction area is small, a mixed structure with a brick-wall load-bearing structure can be adopted, but a lightweight pressure-relief roof must be provided.
4 plane shape. The building plan should be rectangular. The smaller the width of the building, the larger the ratio of the area of ​​the outer wall to the volume, which is more conducive to lighting, ventilation and pressure relief. The width of a multi-storey building should not exceed 18 meters.
5 safe entrance. The entrances and exits for safe evacuation should generally be not less than two and must meet the requirements for safety evacuation distance and evacuation width.
6 explosion-proof section layout. When a building requires only a partial explosion protection, the explosion-proof section shall be arranged on the external wall, requiring at least two external wall surfaces; if there is only one external wall surface, the area shall occupy more than 25% of the total area of ​​the room perimeter. For factories that produce explosives, open or semi-open buildings should be used.
HCPE Resin (coating type) Description
HCPE resin (coating type) is a irregular resultant after depth chlorination with the low molecular weight polyethylene (PE) . Generally the quality score of chlorine is bigger than 65%, and it is the main film-forming substances as new generation antiseptic paint. It has the following characteristics.
(1) Compared with the CPVC, the solubility is good, and more resins can mix with it.
(2) Compared with the CSM, the advantage of HCPE is single-component packaging, it do not use lead oxide, tribasic lead curing agent containing heavy metals. There is no toxicity, and has a broader range of applications.
(3) Compared with the chlorinated rubber, HCPE as the base material of protective coatings retains the advantage of chlorinated rubbers, And overcome the faults of chlorinated rubber exist unsaturated double bond and light chemical reaction and chlorinated degradation sensitive.
(4) Compared with ordinary HCPE, the viscosity is low, take the Tu-4 coating cup, the quality score as the toluene solution 20%, under the room temperature determines, is not bigger than 50S; Ordinary HCPE viscosity generally above 50S.
(5) Made of high-solids coatings, reduces the coating cost greatly, and the coating has a fast-drying nature, and has a better compatibility with other resins. LHCPE film features: The coating made by HCPE has a high solid content. excellent resistance to acid, alkali , salt, etc. It have so excellent corrosion resistance properties; can be used under 15~50°C; film drying quickly.
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