Electric dust remover and cathode rapping insulation device thereof

Abstract

The invention discloses an electric dust remover and a cathode rapping insulation device thereof.The cathode rapping insulation device comprises a rapping shaft and a rapping box, and the rapping shaft penetrates through a wall plate of an electric dust remover shell and extends into the electric dust remover; the device further comprises an insulating pipe, a lantern ring and a hot air source. The vibrating shaft is sleeved with the insulating pipe, the insulating pipe and the vibrating shaft are not in contact, one end of the insulating pipe is located in the vibrating box, and the other end of the insulating pipe is located in the electric dust remover; the lantern ring is sleeved outside the insulating pipe, the lantern ring and the insulating pipe are not in contact, one end of the lantern ring is fixedly connected with the wall plate in a sealing manner, and the other end of the lantern ring extends into the electric dust remover; an air inlet is formed in the rapping box, and the hot air source is communicated with the air inlet, so that hot air enters the rapping box, and air curtains are formed between the insulating pipe and the rapping shaft and between the lantern ring and the insulating pipe. The device can ensure the insulation effect of the cathode rapping shaft.

Description

technical field [0001] The invention relates to the technical field of electric precipitators, in particular to an electric precipitator and a cathode rapping insulation device thereof. Background technique [0002] Boiler tail gas in waste incineration, metal smelting, alkali recovery and other industries has the characteristics of high flue gas temperature, fine dust particle size, strong viscosity and easy moisture absorption. In order to ensure the normal operation of downstream flue gas treatment equipment, dust collectors are generally installed Dust removal treatment is carried out, and insulation is one of the factors to ensure the stable and reliable operation of the electrostatic precipitator. [0003] The insulation device of the electrostatic precipitator mainly includes the cathode suspension insulation device and the cathode rapping insulation device. [0004] The cathode rapping system of the electrostatic precipitator includes a rapping incubator, a rapping ...

AI Technical Summary

Problems solved by technology

[0008] First, an insulating sealing plate is installed where the rapping shaft passes through the wallboard. This method is not suitable for high-temperature, high-viscosity dust conditions. At high temperatures, the insulating performance of the insulating sealing plate decreases, and it is easy to be broken down and lose insulation. At the same time, the surface of the insulating sealing plate is easy to stick to dust, resulting in creepage, and then the problem of insulation failure;

[0009] Second, open a large hole at the position where the rapping shaft passes through the wallboard, and cooperate with the hot air blowing structure. The rapping shaft passes through the large hole without contacting the wallboard, and the hot air blowing is used to prevent dust from entering the vibrating insulation box Dust accumulation, this method requires a large air volume, and needs to be equipped with a large energy-consuming electric heater to prevent dust from entering the vibrating incubator, resulting in high energy consumption; Sweeping, there will still be dust through the large hole into the vibrating insulation box, and dust will accumulate in the vibration insulation box, causing a large amount of dust to adhere to the surface of the insulating shaft in the vibrating insulation box, resulting in creepage of the insulating shaft and loss of insulation performance

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