Semi-off-line deash bag dust-cleaning equipment

Abstract

The invention discloses a half off-line bag filter, which belongs to the technology field of a dust remover. The invention aims to provide a half off-line bag filter which can improve the dust-cleaning efficiency, reduce the resistance of the dust remover, and avoid the damage to the dust remover body caused by the excessive negative pressure in an air cleaning room which is arranged at the upper part of a tubesheet when dust is cleaned. The invention is characterized in that an air cleaning room (9) arranged at the upper side of each row of filter bags of each bag chamber is internally provided with jet pipes (7) corresponding to each row of filter bags (4) in parallel, and the inlet ends of the jet pipes are connected with the outlets of pulse valves (6); nozzles (8) which are parallel with the jet pipes, have the same quantity as the filter bags the same centers with the filter bag mouths are arranged on the jet pipes; and a poppet valve (10) which has two working states of full open and semi close is arranged on a box body arranged on one side of the upper side of each bag chamber. Compared with the off-line dust cleaning, the half off-line bag filter cannot increase the filtration load of other bag chambers; compared with the on-line dust cleaning, the filtration velocity of the bag chambers and the velocity among the bag chambers are reduced by 1 / 2 to 2 / 3, thereby being more beneficial to the deposition of the discharged dust.

Description

technical field [0001] The invention relates to a bag filter for semi-offline dust removal, belonging to the technical field of bag filters. Background technique [0002] At present, the row pulse bag dust collector widely used in building materials and metallurgical industries is equipped with a 3-inch large-diameter pulse valve in each row of filter bags, through a 3-inch blowing pipe parallel to the flower plate, and the number of filter bags The injection branch pipe, which is equal and concentric with the filter bag mouth, sprays compressed air of about 0.3MPa and ejected air (the ejected air flow is 2-4 times the amount of compressed air) into the filter bag at the same time to achieve the purpose of dust removal . [0003] Line pulse bag dust collector is divided into two types: off-line and on-line according to the cleaning method. [0004] Off-line dust cleaning refers to cutting off the filter airflow of a certain unit to clean the filter bag of the unit; the adv...

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Problems solved by technology

[0004] Off-line dust cleaning refers to cutting off the filter airflow of a certain unit to clean the filter bags of the unit; the advantage is that the cleaning efficiency is high, and the disadvantage is that when the filter airflow of a certain unit is cut off, the filter load of other filter units will be increased; at the same time, due to the cleaning unit It is a relatively closed unit. At the moment of blowing, the dust cleaning unit does not have more injection airflow to supplement, so that the space of the clean air chamber above the flower plate of the dust cleaning unit instantly forms a greater negative pressure, causing cracks in the relevant parts of the equipment.

[0005] On-line dust cleaning refers to cleaning while filtering; the advantage is that there is no need to cut off the filter air flow of the filter unit, and the filter load of other filter units will not be increased when cleaning the dust. The disadvantage is that the finer dust particles cleaned from the filter bag are in the process of falling It is lifted up again by the rising airflow between the filter bags and absorbed by the filter bags, so the dust removal efficiency is low, which makes the running resistance of the dust collector relatively high

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