|Industrial dust treatment equipment series|
|Welding fume exhaust gas treatment series|
|Grinding polishing dust removal equipment|
|Stand-alone dust collector|
|Spiral duct and accessories series|
At what temperature is the bag filter generally used? Maximum temperature of bag dust collector and the severity of explosion: The working temperature of bag dust collector is high, the processing air volume is small, the equipment is simple, and it is easier to avoid flue gas cooling and condensation. It is very necessary to determine the proper working temperature for flue gas dust removal to maintain good filtration conditions and extend the life of the filter bag.
The strength of various filter cloths varies with factors such as temperature, humidity, and running time. When purifying the high-temperature flue gas, it should be based on the heat resistance of the filter cloth and the flue gas composition. In normal room temperature dust-removing air, only humidity is a problem, but it is only to prevent clear water from entering the dust removal system, which is often simpler. For high-temperature flue gas dust removal, it is necessary to control the excessively high temperature of the flue gas to prevent burning of the filter cloth, and to control the excessively low temperature to prevent the condensation of the flue gas. In the purification process of the dust filter with dust bag, as long as the temperature resistance of the filter cloth allows The temperature of the flue gas should be made as high as possible, so that the interior of the dust collector is kept dry and the dust removal is performed normally, thereby creating good operating conditions.
Therefore, it is important to develop filter materials with high heat resistance, and current glass fiber filter materials have this advantage. The bag filter will control the operating temperature within the allowable range of the filter cloth, because too low temperature may cause dew condensation, and too high will cause the filter cloth to age prematurely. In addition, the situation of instantaneous temperature increase should be avoided. The environmental protection industry has regulations that after the exhaust gas temperature of the boiler and the waste heat of the flue gas recovered by the waste heat boiler, the flue gas temperature should be controlled below 250 ° C. The flue gas temperature is based on the dew point inside the dust collector. The temperature of the high-temperature gas filtration process is preferably 200-250 ° C, and filtration within this temperature range will make it.
At what temperature is the bag filter generally used?
(1) The explosion of the bag filter is more complicated than the combustible substances and combustible gases. Generally, the combustible dust is suspended in the air to form a dust cloud within the explosive concentration range. Under the action of the ignition source, part of the dust that comes into contact with the ignition source is first ignited And form a small fireball. Under the action of the heat emitted by the combustion of this small fireball, the surrounding dust is heated, the temperature rises, and the phenomenon of ignition and combustion occurs, so that the fireball will rapidly expand and form a dust explosion.
(2) After the explosion of the bag filter, a secondary explosion often occurs. This is because during the first explosion, a lot of dust was deposited together, and its concentration exceeded the upper limit value of the dust explosion and could not explode. However, when the shock wave or air wave formed by the first explosion lifts the deposited dust, it is mixed with air in the air and the concentration is within the dust explosion range, and a secondary explosion may occur immediately. Disasters caused by the second explosion are often much more severe than the first.
(3) Mechanism of dust explosion Combustible dust releases energy when it is burned in the air, and a large amount of gas is produced in the well, and the speed of the energy released, that is, the burning rate is related to the area of the powder exposed to the air. Therefore, for powders of the same solid substance, the smaller the particle size, the larger the specific surface area, and the faster the combustion diffusion. If the particle size of this solid is very fine. It can even be suspended, and once it is ignited by an ignition source, a large amount of energy can be released in a very short time. This energy is too late to dissipate into the surrounding environment, which causes the gas in the space to be heated and adiabaticly expanded. On the other hand, when the powder is burned, a large amount of gas is generated, which will cause the system to form a local high pressure, which will cause explosion and propagation. Called a dust explosion.
How much temperature is the bag filter used? Related recommendations: Boiler bag filter
为大家带的布袋除尘器一般在多少温度下使用相关介绍。 The above is the introduction of the temperature at which the bag dust collectors brought by Yuchen dust removal equipment manufacturers are generally used.