How to deal with coal ash? Can coal ash yarn be used? What is coal ash? It mainly refers to the adhesion of coal ash, soot and fine dust to the surface of the yarn.
The reason for the formation of coal ash yarn is mainly due to the low air pressure and foggy weather, as well as the pollution of the air by crops such as oranges and garbage incineration. These airs are not processed into the spinning process of the yarn textile workshop, especially in the high support. The yarn car platform is more obvious. The occurrence of coal ash yarn is accidental and inevitable.
The formation of coal ash yarn is related to the atmospheric environment of the geographical location of the workshop. The coal ash yarn is related to the geographical location of the enterprise and the degree of pollution of the local atmospheric environment. This factor is mainly reflected in the more developed industrial cities. Due to the double pollution of coal smoke and automobile tail gas, the air contains a lot of smoke. The coal ash and fine dust are attached to the yarn to form the coal ash yarn along with the air-conditioning new wind window and the door and window of the factory building and the exhaust air outlet.
Coal ash yarn is easy to be produced in the spinning process, and it is on the high count yarn with long doffing time (more than 40s, especially higher than 50s). Because the lower half of the cop is in contact with the contaminated air in the workshop for a long time, the smoke enters. After the workshop, it is easy to produce coal ash yarn, which should be controlled.
The spray chamber of the air-conditioning system of the cotton mill is equivalent to a wet dust collector from the perspective of dust removal and has a high washing and filtering effect. According to relevant data, the dust filtration efficiency of dust particle size less than 5um can reach 95%. Moreover, the particle size distribution of coal ash is: the coal ash particle size is less than (including equal to) 5um, accounting for 62.3%, the particle size is less than (including equal to) 2um, accounting for 35.5%, according to the actual measurement, the particle size is about 2um. It is easy to form coal ash yarn, and even the particle size of less than 10um is the majority of coal ash yarn.
Since the dust has a large specific surface area, it is easy to adsorb to the gas, and forms a seed film on the surface thereof, which hinders the contact of the dust with the water droplets, so that the dust cannot be effectively wetted and then washed and settled. That is to say, the spray washing chamber cannot remove the soot by inertial collision and contact retention. In summary, the key to the treatment of the coal ash yarn is to remove the dust particles of 2 um and below.
Throughout the year, coal ash yarns are prone to foggy weather in spring, autumn and winter, and summer crops and autumn crops. In general, the impact of burning crops on orange poles and foggy weather is greater. In the day and night time, the coal ash yarn is generally produced from about 10 o'clock in the evening to the next day. At this time, the surface temperature of the ground is lowered, the air pressure is lowered, and the surface airflow is easy to form fog. If the prevention and control measures are not in place, the coal ash is easily generated. yarn.
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