Filter automatic backwashing equipment and backwashing method thereof

Abstract

The invention relates to the field of manufacturing of filtering equipment in coal chemical industry, and discloses a filter automatic backwashing equipment and a backwashing method thereof. The equipment comprises a filter body (1) with a filter element (2), the filter body is respectively connected with a pulse gas generator (5) and a backwashing pump (9), and the pulse gas generator inputs pulse gas into the filter body and forms pulse vortexes in the filter body; the backwashing pump is used for pumping the filtrate into the filter body to form backwashing liquid and soaking the filter element in the backwashing liquid for backwashing; and the filter body is provided with an output pipeline for discharging a gas-liquid mixture of the pulse gas and the backwashing liquid. According to the invention, under the condition that the top end cover of the filter is not disassembled and the filter element does not need to be taken out, the filtrate is directly used as the backwashing liquidto backwash the filter element in the filter body so that online regeneration of the filter system is realized; flushing time is short, operation is easy, cleaning is thorough, the service life of the filter element is prolonged, and equipment operation cost is reduced.

Description

technical field [0001] The invention relates to filtering equipment in the coal chemical industry, in particular to automatic filter backwashing equipment and a backwashing method thereof. Background technique [0002] Filter is a kind of equipment widely used in coal chemical industry, mainly used to remove residual impurities in solutions such as water or methanol. Among them, the lean methanol filter is a filter commonly used in the low-temperature methanol washing process of coal chemical industry to filter impurities in methanol solution. Due to the large amount of impurities in the system, after a period of operation, the impurities on the filter will accumulate to form a filter cake. When the thickness of the filter cake increases to a certain level, the pressure difference on both sides of the filter blockage rises to the alarm value, and the filtration speed and filtration effect decrease significantly, which will seriously affect the normal operation of the process...

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Problems solved by technology

[0005] The purpose of the present invention is to provide filter automatic backwashing equipment and its backwashing method in order to overcome the problems of long time consumption, high labor intensity and incomplete cleaning in the prior art, which are easy to cause loss to the filter element and affect the life of the filter element. Without dismantling the top end cover of the filter and taking out the filter element, the filtrate is directly used as the backflush liquid to backwash the filter element in the filter body through the pulse gas generator and the recoil pump respectively connected to the filter body. Rinse to realize the online regeneration of the filter system; the flushing time is short, the operation is simple, and the cleaning is thorough without causing damage to the filter element, which improves the service life of the filter element and reduces the operating cost of the equipment

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