Off-line pulse cleaning dust collector structure principle

The off-line pulse cleaning dust remover is an off-line spray cleaning equipment. It can be completely cleaned and sprayed once without any secondary pollution. Therefore, the cleaning cycle is extended by the conventional 3-3-5 minutes. By 20-30 minutes, therefore, the energy consumption of cleaning is reduced, and the gas consumption is only about one tenth of the conventional type.

The off-line pulse cleaning dust remover consists of a box, a cleaning device, a compressed gas path, and a conveying device. The main principle of cleaning is that the dust-laden air enters the ash hopper of each compartment from the inlet air flow pipe of the dust collector and under the diversion of the hopper guiding device, the dust of the large particles is separated and falls directly into the ash hopper, while the fine dust Adsorbed on the outer surface of the filter bag, the clean gas passes through the filter bag and enters the upper case, and is discharged into the atmosphere through the offline valve and the exhaust pipe.

As the filtration progresses, the dust on the filter bag accumulates more. When the resistance of the device reaches a limited resistance value, the cleaning control device automatically closes the one-line offline valve according to the differential pressure setting value or the cleaning time setting value. After that, the electronically controlled pulse valve is opened according to the setting procedure, and the first sub-chamber is blown by the air, so that each filter bag suddenly expands, thereby vibrating the dust attached to the surface of the filter bag, so that the pressure difference between the inside and the outside of the bag is restored to the beginning of use. State, the dust sinks the ash bucket, and then the pulse controller opens the poppet valve at regular intervals, restores the filtration of the first chamber, restarts the poppet valve of the second compartment, closes the filtered airflow of the second compartment, and opens the second compartment. The solenoid valve releases the high-pressure compressed air, and all the filter bags in the second compartment air chamber are pulse-sprayed, and the dust in the second compartment filter bag is removed, and the third chamber and the fourth chamber are cleaned until the last compartment is cleared. After the ash is finished, the controller is turned off, the dust collector returns to the official dust removal state, and the dust on the filter bag is shaken off into the ash hopper and discharged by the ash discharge system.

The off-line cleaning system divides the interior of the precipitator into a plurality of sealed air chambers. The air outlets on the panels of each air chamber are independently installed with baffles, compressed air control systems such as cylinders and solenoid valves, and pulse cleaning is performed on a certain air chamber. Before the ash is blown, it is necessary to first control the baffle so that the air chamber is no longer filtered by the flue gas. Therefore, the off-line cleaning structure of the bag filter is relatively complicated, so the cost and maintenance of the offline dust collector are relatively higher than the online cleaning. The ash precipitator is high, but for some special processes such as garbage incineration, the soot is loose in nature, and it is not easy to form a cake. It is also difficult to effectively clean the ash. Only the offline cleaning method can be used to reduce the “secondary dust”. The cleaning stage is more thorough and achieves the effect of reducing equipment resistance.