Runoff long-bag low-pressure pulse bag type dust collector

Abstract

The invention relates to a runoff long-bag low-pressure pulse bag type dust collector. At present, a blowing pulse dust collector has the defect that a filter bag has the troublesome process of check and replacement and is easy to interfere by weather factors, the defect that the service life of the filter bag is shortened due to the extraordinary strong scour of high-pressure airflow on the filter bag, the defect that a chimney flue is not closed completely due to expansion caused by heat and contraction caused by cold in equipment, and other defects. The bag type dust collector comprises a group of single bag type dust collectors and a controller thereof, wherein the controller comprises a personal computer (PC) cabinet (25); the PC cabinet is respectively connected with an industrial control computer (26), a programmed logic controller (27), a motor control center (28), a field control case (29), a temperature sensor (44) arranged on an inlet chimney flue of each single bag type dust collector, a stock-level sensor (45) arranged on a dust collecting hopper of each single bag type dust collector and a differential pressure sensor (22) arranged on an air-purifying chamber shell and a dust air chamber shell; and the single bag type dust collectors are arranged in a parallel connection structure. The runoff long-bag low-pressure pulse bag type dust collector is used for managing smoke dust in coal-fired boilers.

Description

Technical field: [0001] The invention relates to a radial-flow long-bag low-pressure pulse bag dust collector used for dust control of coal-fired boilers. Background technique: [0002] At present, there are three main types of dust removal methods for the bag filter used in the dust control of coal-fired boilers at home and abroad. [0003] 1. Mechanical vibration dust cleaning bag filter. Use a mechanical device to vibrate or shake the frame of the suspended filter bag to make the filter bag vibrate and remove the accumulated dust. This is one of the oldest and simplest ways that was once widely used in industry. The vibration distribution of mechanical rapping is uneven, and the required filtering wind speed is low. The vibration wave propagates from top to bottom, and the dust removal on the upper and lower surfaces of the filter bag is uneven, resulting in excessive dust removal on the upper part and insufficient dust removal on the lower part. Filter bags are often...

AI Technical Summary

Problems solved by technology

The rotary jet pulse dust collector uses a pulse valve connected to a group of rotating arms as the blowing pipe, while rotating while blowing and cleaning the filter bag under the flower plate, reducing the number of pulse valves required by the equipment, but the structure is complex and installation And processing requirements are strict, the structural rotating arm is prone to wear, and there is an error in the rotating mechanism, which reduces the blowing effect

At present, the operation process of filter bag inspection and replacement is cumbersome in line-jet pulse dust collectors, and it is easily disturbed by weather factors; the high-pressure airflow scours the filter bag too strongly, which shortens the service life of the filter bag.

[0007] At present, all dust collectors also have shortcomings such as poor sealing of the flue due to thermal expansion and contraction of the equipment.

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