Blast furnace dry pulse bag type dust collector is divided into off-line cleaning room, each room bag into the array, each number. With the continuous filtration process, the outer layer bag dust gradually increased, so that the dust resistance increased, when the resistance to the set range, dust control system (PC) signals. Close the switch valve opening pulse valve first, compressed air through the nozzle to each bag so that the bag jet, deformation and earthquake spirit, achieve the purpose of dust cleaning. After cleaning, two switch open the valve again, and pulse bag filter into the filter state, do not interfere with each other, to achieve a long-term continuous operation, improves the cleaning effect. Because of its high filter speed, small size, easy to operate. Overcome the big bag of the above three problems, the use of the factory after the general response is good.
Taking 300m3 blast furnace as an example, the characteristics of blast furnace gas dry pulse bag filter are as follows:
The average filtration velocity 0.8m/min, 60%-80% higher than the big bag, thus reduced the area of filter cloth. The number of the same blast furnace box is only 4-6, which is reduced by more than 30%.
Long service life of the filter cloth. Due to the use of high performance filter material, under the condition of frequent reverse blowing life of about 2-3 years. Workers are no longer frequently check the bag, the complex labor, improve the quality of the gas.
The cleaning device consists of bag filter: pulse valve, injection pipe, gas storage device, filter bag, induction and control instrument, pulse valve are respectively connected with both ends of the compressed air and blowing, blowing repeatedly blowing deashing. Blowing system and compression pipeline system comprises a gas storage tank, nozzle and other related connecting accessories, storage tank is to provide compressed air storage device, has a certain strength, the first input signal, so that the diaphragm is in the standby state, the use of air pressure, the diaphragm to vibrate, closed. Compressed air system compressed air required to dry the air, can not contain oil like substances, or will cause some damage to the bag filter.
Bag filter dust removal device is an important component of the device, according to the different ways of cleaning, bag filter can be divided into several categories. The use of periodic operation of the machine to shaking the bag, to achieve the purpose of dust cleaning, this method can also be divided into two types, namely continuous shaking and intermittent shaking, the selection of these two types to choose according to the actual situation and the dust density; using compressed air instead of machinery the earthquake hit, its principle and mechanical shock principle is the same, just hit the earthquake in different ways; when the dust deposited after the choice of pulse cleaning, in the release of compressed air time, will affect the surrounding atmospheric air strong