Gravity inertia bag type composite dust collector

Abstract

The invention discloses a gravity inertial bag type composite dust remover, comprising at least a dust collector box. Each dust collector box is divided into at least two columns of independent filter chamber, each column of filter chamber comprises a gravity inertia pre-dedusting chamber with an air inlet and a filter bag filter chamber; each column of the filter chamber is divided by board hanging with a filter bag into an upper clean gas chamber, and a lower flue gas chamber communicated with the gravity inertial pre-dedusting chamber; the upper clean gas chamber is provided with a low pressure pulse blowing mechanism; the gravity inertial dedust chamber is provided with a flue gas pre-dedusting allocation mechanism; all gravity inertial pre-dedusting chambers are communicated with a smoke inlet pipe provided with an inlet baffle door; the smoke inlet pipe is provided inside with a flue gas cooling mechanism; the smoke inlet pipe at the inlet of the gravity inertial pre-dedusting chamber is equipped with a three-dimensional smoke distribution mechanism; each upper clean gas chamber is respectively communicated with a smoke outlet branch pipe provided with outlet baffle door; and all smoke outlet branch pipes are communicated with all the smoke outlet header pipe. The filter bag provided by invention has the advantage of long service life.

Description

technical field [0001] The invention relates to a dust collector, in particular to a gravity inertia bag type composite dust collector. Background technique [0002] The filter bag is the key component of bag filter dust removal. At present, the structure of the bag filter is as follows: including the dust collector box, the dust collector box is divided into an upper clean gas room and a lower flue gas room by a flower plate, and a number of filters connected with the upper clean gas room are vertically suspended on the flower plate. There is an air inlet in the lower flue gas chamber of the dust collector box, and an air outlet in the upper clean gas chamber. The gas outlet is connected, the smoke inlet pipe is also connected with the flue gas bypass pipe, the flue gas bypass pipe is connected with the outside atmosphere, and a valve that can open and close the flue gas bypass pipe is set on the flue gas bypass pipe . The disadvantages of this bag filter are: (1) The fl...

AI Technical Summary

Problems solved by technology

The disadvantages of this bag filter are: (1) The flue gas temperature of the dusty flue gas discharged from the flue inlet pipe into the flue gas chamber under the dust collector box is generally very high. When the flue gas temperature exceeds the filter bag can bear When the limit temperature of the filter bag is working in the overheated flue gas, it is very easy to damage and fail; (2) The distribution of the dusty flue gas flow from the flue inlet pipe into the flue gas chamber under the dust collector box is uneven, that is, the dusty flue gas The gas enters the lower flue gas chamber with a relatively low air distribution uniformity. When the dusty flue gas with uneven air distribution is discharged into the lower flue gas chamber, it will cause uneven dust filtration load of the whole dust collector. In the area where the air flow is relatively concentrated Due to the relatively large dust filter load and high filtering wind speed, the filter bag is prone to damage, and once the filter bag is damaged, the air flow resistance in the damaged filter bag area will be lower, resulting in more concentrated air flow, which in turn causes The filter bag in a larger area is damaged; (3) Due to the high flow rate of the dusty flue gas discharged from the smoke inlet pipe into the flue gas chamber under the dust collector box, and the dusty flue gas contains a large amount of large particles of dust ( Dust particle size is greater than 50μm), when the dusty flue gas is discharged into the lower flue gas chamber through the smoke inlet pipe at a relatively high flue gas flow rate, since there is no flue gas pre-dust distribution device in the lower flue gas chamber, it enters the lower flue gas chamber The dusty flue gas will directly impact the filter bag, and at the same time, the large particles of dust in the dusty flue gas will also directly wash the filter bag, so that the filter bag is easily damaged, which not only greatly reduces the use of the filter bag (4) There is no cooling protection device that can cool down the flue gas. When the flue gas temperature of the bag filter is too high, the bag filter cannot normally remove dust and other abnormal conditions. At present, the flue gas bypass pipe is opened, and the dusty flue gas is directly discharged into the atmosphere without filtering, and the flue gas bypass pipe is closed until the abnormal working condition is repaired, which will easily cause environmental pollution.

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