Static electricity and inorganic porous ceramics combined dusty gas purification device

Abstract

The invention relates to a static electricity and inorganic porous ceramics combined dusty gas purification device and belongs to the technical fields of dust removal, waste gas treatment and environmental protection. The device adopts a high-voltage electrostatic charge module to charge dust in airflow and enable a self corona electrode to be connected with a downstream porous SiC ceramic filtering pipe through an electrode guide frame, so that the surface of the porous SiC ceramic filtering pipe is charged with the electric charge the same with the corona electrode; gas passes through tiny pore passages in the wall surface of the porous SiC ceramic filtering pipe, and dust particles charged by the corona electrode are held back by the porous SiC ceramic filtering pipe so as to complete dust removal. As the porous SiC ceramic filtering pipe and the dust are electrically charged with the same electric charge, strong electrostatic repulsion between the porous SiC ceramic filtering pipe and the dust ensures that the dust particles cannot enter the tiny pore passages in the wall surface of the porous SiC ceramic filtering pipe, are accumulated on the surface of the ceramic pipe only and form loose pressed powder, and the dust can be removed easily; in addition, the pressed powder has small air resistance and is not subjected to excessive airflow voltage drop along with the lengthening of the dust removal time.

Description

technical field [0001] The invention relates to a dust-containing gas purification device combined with static electricity and inorganic porous ceramic tubes, and belongs to the technical fields of dust removal, exhaust gas treatment and environmental protection. Background technique [0002] With the rapid development of my country's economy, the haze air pollution in large and medium-sized cities, economically developed areas and areas with intensive basic industries in my country is becoming more and more serious. As my country's restrictions on SOx and NOx emissions become increasingly stringent, and related environmental protection technologies and devices continue to be put into use, the total emissions of SOx and NOx pollutants in my country's atmospheric environment have decreased year by year. However, from the current monitoring results, my country's Yangtze River Delta On the contrary, the smog pollution in the Pearl River Delta and Beijing-Tianjin-Hebei areas is b...

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Problems solved by technology

[0007] At present, with the maturity of industrial porous ceramic technology, there are already very reliable porous ceramic filter tubes for dust filtration of industrial waste gas (such as related products of Yixing Non-metallic Chemical Machinery Factory in Jiangsu Province). Due to the high thermal stability of ceramic tubes, they can be used In the case of high-temperature gas filtration, however, unlike bag dust collection, when the dust on the surface of the porous ceramic gas filter tube is too thick, it cannot be cleaned by "vibrating" and can only be cleaned by compressed gas blowback. Dust cleaning, which leads to many tiny particles deposited in the pores of the porous ceramic tube cannot be completely removed, making the air resistance of the porous ceramic tube larger and larger during use

In addition, when the gas contains tar particles, the viscous tar particles will fatally block the pores of the porous ceramic filter membrane, so that it will completely lose its gas filtering ability

[0008] In recent years, in the field of electric bag composite dust removal, a new dust removal technology that weaves conductive fibers into the cloth bag to charge the cloth bag has emerged. It can be loaded with the same kind of charge as the corona electrode, or it can be loaded with the opposite charge. It is more reasonable to load the same charge, so that the dust will be repelled by the surface of the bag, thus forming a very loose powder cake on the bag, so the bag is cleaned. It is very easy to dust, and the air resistance of the powder cake is very small, and the cycle of dust cleaning is greatly extended

However, this solution has high requirements for the production of cloth bags, requiring conductive fibers to be very uniformly blended in the cloth bag, and the cloth bag cannot withstand the working condition of high flue gas temperature. In addition, the ozone generated by the dust-charged electrode (corona electrode) is still Oxidative damage to bags

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