Wet electrostatic precipitator insulation box hanging type insulation device

Abstract

A hanging type insulating device of a wet electric precipitator insulating box comprises an insulating cover, an insulating box base, an insulator, a hanging rod and a cyclone disc. The insulating cover is arranged on the insulating box base through a bottom disc flange. A conical hole is formed in the center of a bottom plate of the insulating cover, and the large opening end of the conical hole faces upwards. The cyclone disc is a circular ring. A plurality of air flues are evenly distributed on the circumferential wall of the cyclone disc. The air flues are inclined air flues with the large outer ports and the smaller inner ports and are consistent in inclination direction. The cyclone disc is arranged in the conical hole of the bottom plate of the insulating cover, is coaxial with the bottom disc flange and is arranged at the upper end of the bottom disc flange. The insulator is placed at the upper portion of the cyclone disc. An air inlet is formed in the top of the insulating cover. After entering a cavity of the insulating cover through the air inlet, the hot air enters the insulating box base through the air flues on the cyclone disc, and a backspin cyclone curtain can be formed after hot air enters the insulating box base; partition is formed for an insulating box base inner cavity where wet smoke invades, the short circuit between the hanging rod with high-voltage electricity and the cavity of the insulating cover so that electric conduction can be avoided, and the short-circuit access among the hanging rod, a gland and the insulating box base is blocked.

Description

technical field [0001] The invention relates to the field of insulating hanging devices, in particular to a hanging type insulating device for an insulating box of a wet electrostatic precipitator. Background technique [0002] The basic principle of wet electrostatic precipitator is the same as that of dry electrostatic precipitator. They both use high-voltage direct current to collect dust, and the voltage can reach about 80 kV. Compared with dry electrostatic precipitator, wet electrostatic precipitator deals with wet flue gas and has higher insulation requirements. There are two types of insulation currently in use: [0003] (1) Tapered quartz tube insulator, this method was first used in sulfuric acid, coking and other industries, and its use is relatively mature. Its shortcomings mainly include the following aspects: [0004] (1) Quartz tubes are not easy to purchase and the price is high; [0005] (2) The insulation box adopts electric heating, and the power consum...

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Problems solved by technology

[0004] (1) Quartz tubes are not easy to purchase and the price is high;

[0005] (2) The insulation box adopts electric heating, and the power consumption of each insulation box reaches more than 2 kilowatts, and the use cost is high;

[0007] (4) Long-term use is easy to form crystals in the quartz tube, which eventually leads to discharge breakdown and poor stability;

[0008] (5) The quartz tube is made of quartz burnt paper, with many defects. After processing, the surface is rough and easy to hang dust on the surface, which eventually leads to discharge

[0010] (1) The shell of the insulating box is relatively large, with a diameter of 2m, which increases the cost;

[0011] (2) The air volume is large, and the air volume of each insulating box is 700m3 / h, and the power consumption is 21 kilowatts. Increasing the air volume of the fan and the power of the electric heating increases the cost of construction and operating costs;

[0012] (3) Inconvenient for installation and maintenance

[0013] In the wet electrostatic precipitator, the flue gas to be treated is saturated steam with a certain humidity. Although the saturated steam contains a certain humidity, it will have a positive effect on dust removal, but at the same time it will also bring harm to the insulation and anti-corrosion of the electrostatic precipitator. bigger problem

Judging from the operating conditions of the wet electrostatic precipitator in recent years, the frequency of failures caused by the above factors is relatively high

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