Improved electroconductive glass fiber reinforced plastic electric demister

Abstract

The invention discloses an improved electroconductive glass fiber reinforced plastic electric demister. One side in the lower shell, corresponding to an air inlet flange, is provided with a forced air flow guiding and distributing plate, a middle shell below a lower cathode bearing framework is internally provided with a forced air distributing plate, an adjustable air distributing plate and an air rectifying and distributing plate from bottom to top in sequence, an upper shell is internally provided with an adjustable air distributing plate and a forced air distributing plate from bottom to top, the forced air distributing plates in the upper shell and the middle shell are both arranged in a prism frustum body of each of the upper shell and the lower shell, and by means of arranging the forced air guiding and distributing plate in the lower shell, arranging three layers of air flow distributing plates, namely the forced air distributing plate, the adjustable air distributing plate and the air rectifying and distributing plate, in the middle shell, and arranging the adjustable air distributing plate and the forced air distributing plate in the upper shell, air flows passing in and out of an electric field are made uniform, so that the shakes of a cathode system are reduced and the demist efficiency of the electric demister is increased.

Description

technical field [0001] The invention relates to a wet process equipment for separating SO2 flue gas from acid mist impurities, in particular to the technical field of acid mist removal from smelting flue gas, desulfurization, tail gas treatment, and chemical plants. Background technique [0002] Electrostatic demister is the key equipment for the separation of SO2 flue gas and acid mist impurities. Electrostatic demister has various types such as vertical type, horizontal type, tube type and plate type. Since the electrostatic precipitator is generally in the acidic gas, it must be made of materials with better anti-corrosion properties. Commonly used main materials are lead, plastic and conductive glass steel. Among them, lead electrostatic precipitator has the longest application history, followed by plastic and conductive glass fiber reinforced plastic. However, lead material has a large proportion, large creep property and lead poisoning phenomenon will occur when it i...

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Problems solved by technology

However, the lead material has a large specificity, large creep property, and lead poisoning will occur when it is manufactured and used.

Plastic electrostatic demisters rely on liquid film to conduct electricity, the effective precipitation area changes greatly, the operating voltage and current are low, and the plastic material has low strength, poor weather resistance, easy cracking, and relatively high air leakage rate, such as the Chinese patent ZL201110219187.0 discloses a glass fiber reinforced plastic washing type electric demister, which is provided with a steel structure layer through the head, the upper shell and the lower shell respectively, and a glass steel layer is set outside each steel structure layer, which has good electrical conductivity and good defogging. It has the advantages of high efficiency, strong acid mist corrosion resistance, less investment, and washing function. It also has the characteristics of compact structure, high strength, good rigidity, and not easy to deform. However, the gas distribution of traditional electrostatic demisters is generally filled with simple ceramic rings. , resulting in uneven airflow distribution of the electrostatic demister, which means that there are high and low velocity areas in the electric field, and there are eddy currents and dead angles in some parts. The appearance of this phenomenon, the increased efficiency of acid mist removal at low flow velocity is far from enough to make up for the flow velocity Reduced efficiency at altitude

In addition, the high-speed airflow and eddy current will cause erosion, which will cause the acid mist on the anode tube to fly twice. Due to the poor airflow distribution, the efficiency of the electrostatic demister can be reduced by more than 20-30%, and the uneven airflow distribution will also cause polar lines. The shaking of the frame and the frame, the frequent spark discharge of the electric field will cause the instability of the electric field voltage and affect the defogging efficiency

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