With the extension of filtration time, the dust layer on the filter bag continues to accumulate thick, and the resistance of the dust removal equipment continues to rise. When the resistance of the equipment rises to the set value, the dust removal device begins to clean the dust. The electrical control of the central dust removal system is the command center of the whole dust removal system, which requires the electric control system to operate, operate and maintain easily. The dust removal control system center adopts PLC, high degree of system automation, central dust removal system operation and unloading control automatic interlock. The cleaning control can realize centralized management and decentralized control.

Let's take a look at several elements of the central dust removal system to meet emission standards:

First, the flue gas temperature directly affects the smoke removal effect of cupola dust collector. When the flue gas temperature of the spark collector is higher than 130℃, the emergency air mixing valve in front of the cupola dust collector will often be opened, the air pumping rate at the end of the air pipe will sharply decrease, and the exhaust effect will decline. When the flue gas temperature into the dust collector is more than 130℃, the dust bag shrinkage deformation, so that the operation resistance increases, if the flue gas temperature exceeds the softening temperature point of the dust bag filter material, resulting in the dust bag burned or failure.

Two, the quality of dust filter material directly affects the emission concentration of soot. Cupola smoke is characterized by light, fine, large dispersion and poor fluidity, which is easy to cause paste bag. Therefore, it is recommended to choose good water resistance, moisture is not combined with cloth bag, non-stick dust, dust, water settling ash bin, filter fiber fracture strength is greater than 24kg/cm transverse, longitudinal greater than 14kg/cm.

Three, central dust removal system technology. Ash removal using medium gas, the pressure is adjustable. The medium gas used for dust removal should be water-free, oil-free, and nitrogen is recommended. After the dust collector stops running, it should continue to blow the dust back for two cycles to avoid the formation of caking and paste the bag with the moisture in the air and the dust on the surface of the bag.

Fourth, under the premise of smelting process, increase the fixed point inspection and regular repair of equipment. Increase the regular training of equipment personnel, regular spot inspection and regular maintenance management of equipment, arrange weekly maintenance, and timely replacement of damaged parts, cupola dust removal system normal operation, discharge standards.

The central dust removal system is mainly composed of gravity settling chamber, high temperature flue gas cut-off valve, water-cooled multi-pipe cyclone dust collector, water-cooled multi-pipe cooler, thermocouple, separate chamber back-blowing bag dust collector, air regulating valve, induced draft fan, dust extraction pipe and chimney, and desulfurization system. After the dust removal equipment, dust emission ≤50mg/Nm3, SO2 meets the emission standard. The central dust removal system is different from the dust removal equipment used in other occupations. The dust removal system needs high temperature treatment, the cupola dust temperature is too high, and a cooling dust removal equipment needs to be added in front of the bag dust collector to achieve the purpose of protecting the bag dust collector filter bag. Can withstand high temperature dust bag quotation is relatively good, if the replacement frequency is too high, the cost will be too high. central dust removal system adopts double conical tower dust removal, so that mud and water do not contact the cylinder wall, preventing the blockage caused by sticky ash. The central dust removal system adopts two towers installed directly on the two chimneys of the shaft kiln to avoid the resistance caused by the flue gas walking curves, so the resistance of the equipment is very low and no induced wind will be used to produce the opposite smoke phenomenon. It has the advantages of simple structure, stable operation, less initial investment and convenient maintenance.

central dust removal system is easy to maintain, the top of the equipment is connected with bolts, convenient maintenance, convenient replacement of filter bag skeleton, and clean ash removal, ash removal by pulse valve spray, compressed air spray filter bag, pulse completed by the control system. In addition, the central dust removal system is easy to install. Usually, after the parts of the equipment are processed by the factory, they will be transported to the site for hoisting by crane, and the equipment will be fixed by bolts, which is convenient for assembly and saves time.

central dust removal system https://www.kaisenfilter.com/Central-Dust-Collector