First, basic knowledge:
Explosive environment: A potentially explosive environment.
Explosive atmosphere: Under atmospheric conditions, a mixture of gas, vapour or mist of flammable material and air, ignited in the mixture, the combustion will spread throughout the environment of the unburned mixture.
Operating temperature: The temperature reached by the equipment during rated operation. Maximum surface temperature: The maximum temperature at which the surface or any part of the electrical equipment may reach when exposed to the most unfavorable conditions of the electrical equipment and may cause the surrounding explosive atmosphere.
Explosion-proof type: Specific measures taken to prevent electrical equipment from igniting the surrounding explosive gas atmosphere.
Intrinsically safe circuits: Circuits that do not ignite a prescribed explosive atmosphere under any conditions of normal operation and specified fault conditions that produce any spark or any thermal effect.
Intrinsically safe equipment: All electrical circuits within it are intrinsically safe electrical equipment.
Explosion-proof enclosure: An explosion-proof type of electrical equipment in which the outer shell can withstand flammable mixture that penetrates into the outer shell through any joint surface or structural gap of the outer shell and explode inside without damage, and does not cause external damage from one or more The explosive atmosphere formed by gas or steam ignites. Explosion-proof versions of flameproof enclosures are often referred to as flameproof types and are represented by the letter â€œdâ€. The symbol Ex indicates that the electrical equipment complies with one or more of the explosion-proof types.
Second, classification and temperature groups:
Electrical equipment for explosive gas atmospheres is divided into:
Category I: Electrical Equipment for Coal Mines,
Category II: Electrical equipment for explosive gas atmospheres other than coal mines.
Class II electrical equipment can be further classified according to the characteristics of explosive gases:
Class II flameproof "d" and intrinsically safe "i" electrical equipment is further divided into IIA, IIB and IIC categories; this classification provides the maximum experimental safety clearance for flameproof electrical equipment and the minimum for intrinsically safe electrical equipment. Actually, the current is divided; the equipment of the sign IIB can be applied to the conditions of use of the IIA equipment, and the equipment of the sign IIC can be applied to the conditions of use of the equipment of the IIA and IIB.
Sand Base Aac Manufacturing Plant, which is a AAC block production process with sand as the main material, a complete process mainly includes crusher, ball mills, bucket elevator, mixing center, pouring machine, autoclave, crane, cutting machine boiler , dust collectors and so on, the dimension of the block is adjustable. The crusher is used to crush the lime into small gravel for further grinding purpose, one Ball Mill is to grind the sand into powder and the other one is to grind lime. After batching and thoroughly mixing, the slurry is poured into a mound, where the green cake will go through several different processes such as pre-curing, cutting and curing in the autoclave. Then the finished AAC block is produced and can be delivered to the market.
Sand Aac Manufacturing Plant
Sand Aac Manufacturing Plant,Sand Crushing Plant,Aac Bricks,Aac Block Machine
Henan Mingyuan Heavy Industrial Machinery Company Co., LTD. , https://www.heavyequipmentchina.com