Water-immersed self-cleaning cloth roller blind wet electrostatic precipitator

Abstract

The invention relates to a water-immersed self-cleaning cloth roller blind wet electrostatic precipitator. The technical scheme is as follows: the precipitator comprises an air inlet box (6), a precipitator body (7), an air outlet box (10) and dust buckets (8), wherein the precipitator body (7) comprises a plurality of cloth roller blind units (9) which are arranged in parallel or in series; the cloth roller blind units (9) comprise diving shafts (11), driven shafts (14), corona electrode wires (12) and cloth roller blind electrodes (13); the cloth roller blind electrodes (13) are made of anti-corrosion fiber cloth; the driving shafts (11) are connected with a motor (3) through a power transmission device (4); the cloth roller blind electrodes (13) are wound on the driving shafts (11) and the driven shafts (14); the corona electrode wires (12) are arranged on the inner sides and the outer sides of the cloth roller blind electrodes (13); and the driven shafts (14) are immersed in water in the dust buckets (8). The precipitator provided by the invention solves the problems that a water film is not uniformly distributed on the surface of a precipitation electrode and a metal precipitation electrode is corroded, and realizes automatic cleaning and high-efficiency dust removal.

Description

technical field [0001] The invention belongs to the technical field of dust removal, and relates to a wet electrostatic precipitator, in particular to a water-immersed self-cleaning cloth rolling curtain wet electrostatic precipitator. Background technique [0002] In recent years, in order to effectively control the emission of particulate matter pollutants, the state has formulated stricter emission standards. In general areas, the dust emission limit of coal-fired boilers is 30mg / m 3 , the smoke and dust emission limit of coal-fired boilers in key areas is 20mg / m 3 . This puts forward higher requirements for industrial dust removal technology. [0003] As a high-efficiency and low-consumption dust removal equipment, dry electrostatic precipitator (ESP) is widely used in industry, but it has a series of problems. For example, it is easy to generate secondary dust when vibrating and cleaning. If the plate dust is too thick, it will cause back corona phenomenon, and the c...

AI Technical Summary

Problems solved by technology

However, there are still three problems in the traditional wet electrostatic precipitator: First, most of the dust collecting plates are made of metal plates, and the metal plates are not flat, which causes the washing water to flow on the plates when spraying water to wash the plates. The distribution on the plate is not uniform, which leads to the phenomenon of "channel flow". If the water does not reach the place, it is easy to generate scale. If the scale is not removed in time, it will affect the dust removal efficiency of the dust collector, and even cause the failure of the dust collector; second, Industrial flue gas usually contains corrosive gases. In order to prevent the corrosion of the plates, the dust collector plates are made of corrosion-resistant alloy materials (such as stainless steel plates), which increases the cost of wet electrostatic precipitators; third, traditional wet electrostatic precipitators In the dust collector, a spray system must be installed in the dust collector. Under the action of the electric field force, the water mist is collected on the plate and flows down along the plate to achieve the purpose of cleaning the plate. However, part of the uncollected water mist is Exhausted with gas, producing white plume

[0005] In order to achieve uniform distribution of water film and avoid corrosion of metal plates, Shandong University proposed a water-distributed flexible dust-collecting electrode device (patent application number: 201210295051.2). The water pipe is arranged in the middle of the plate to realize the uniform distribution of the water film, but the dust collection pole of the device only collects dust on one side, and the area between the driving shaft and the driven shaft does not collect dust, wasting a part of the space

In addition, the device uses a scraper to remove mud. The friction between the scraper and the pole plate will wear the dust collector to a certain extent, which will affect the service life of the dust collector.

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