Large off-line ash removal bag-type dust collector

Abstract

The invention discloses a large off-line ash removal bag-type dust collector which comprises a dust collector box internally partitioned into two channels. Each channel is internally partitioned into two chambers, each chamber is partitioned into an upper purified gas room and a lower smoke room through a tube nest provided with a plurality of filter bags in a perpendicular suspension mode, a pulse jet ash removing mechanism is arranged in each chamber, a gas inlet is formed in each lower smoke room, the gas inlets of the lower smoke rooms in each channel are communicated with one air inlet flue branch pipe at the same time, the two air inlet flue branch pipes are communicated with an air inlet flue main pipe at the same time, each air inlet flue branch pipe is provided with an inlet baffle door, automatic smoke balanced distributors are arranged on the air inlet flue main pipe and the smoke flow distributing parts of all the air inlet flue branch pipes respectively, the upper purified gas room of each chamber is provided with an air outlet, the air outlet of each upper purified gas room is communicated with an air outlet flue branch pipe which is provided with an outlet baffle door, and the air outlet flue branch pipes are communicated with an air outlet flue main pipe at the same time. The large off-line ash removal bag-type dust collector has the advantages of being high in dust removing efficiency.

Description

technical field [0001] The invention relates to a large off-line dust cleaning bag type dust collector. Background technique [0002] The structure of the currently used large-scale bag filter is: including the dust collector box, the interior of the dust collector box is divided into two rows of independently sealed channels by the first partition, and the interior of each channel is separated by the second partition It is formed into two rows of independently sealed chambers, each chamber is divided into an upper clean air chamber and a lower flue gas chamber by a flower board, and several filter bags are vertically hung on the flower board of each chamber, and in each chamber The upper clean air chamber is respectively equipped with a pulse jet soot cleaning mechanism capable of blowing and cleaning the filter bag, and an air inlet is respectively set on the side wall of the lower flue gas chamber of each chamber. The air inlets of the lower flue chambers of the two cham...

AI Technical Summary

Problems solved by technology

The disadvantages of the above-mentioned large-scale bag filter are: (1) Only the online dust cleaning method can be used to spray and clean the filter bag, but the online dust cleaning method has a skylight effect, where the skylight effect refers to: the moment of convective pulse cleaning, At this instant time t≤0.2s, the micropores of the filter bag will inevitably expand. When the high-pressure air flow disappears and turns to negative pressure micropores close, many particles of dust will pass through the expanded micropores, thereby reducing the filter bag itself. Due to the high frequency of pulse jet dust removal, this kind of instantaneous leakage will accumulate and eventually seriously affect the filtration accuracy and efficiency of the filter bag itself. This is like a closed skylight suddenly After opening, it is suddenly closed, so it is called "skylight efficiency"; due to the existence of the skylight effect, the dust removal efficiency of the filter bag is reduced and the service life is shortened; (2) The flow of flue gas entering each chamber is not balanced, resulting in The flue gas flow load of each row of warehouses is uneven, and the filter bags with heavy loads for a long time will be blocked and damaged, which will reduce the dust removal efficiency and shorten the service life of the filter bags

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