Electrical dust removal equipment and electrical dust removal system

Abstract

The invention relates to electrical dust removal equipment and an electrical dust removal system in the fields of coal pyrolysis and biomass coal pyrolysis. The electrical dust removal equipment comprises an electrical dust removal equipment body which is provided with a preheating device, wherein the preheating device is an integral preheating device, and is a high-temperature gas pipeline; the high-temperature gas pipeline is connected with an inner cavity of the electrical dust removal equipment body; the electrical dust removal equipment body is provided with regeneration devices or a regeneration device which are / is a physical regeneration device and / or a chemical regeneration device; the physical regeneration device is a scraping mechanism arranged on an ash attached component; and the chemical regeneration device is an oxygen deficient gas input mechanism. Through integral preheating on the electrical dust removal equipment body, temperatures of various areas and components in the electrical dust removal equipment are relatively uniform and consistent, so that high-temperature, high-oil-content and high-dust-content gas molecules entering a temperature consistent overall environment will face less temperature change and physical state change, and neither partial space physical state change nor condensation precipitation can happen easily even if by the action of dust.

Description

technical field [0001] The invention relates to the technical field of electric dust removal equipment, in particular to electric dust removal equipment and systems in the fields of coal pyrolysis and biomass pyrolysis. Background technique [0002] Electric dust removal is a kind of gas dust removal method. The dust-containing gas is electrically separated when it passes through the high-voltage electrostatic field, and the dust particles and negative ions are combined with negative charges, and tend to discharge and deposit on the surface of the anode. It is used to purify gas or recover useful dust particles in metallurgical and chemical industries. A dust collection method that uses an electrostatic field to ionize the gas so that the dust particles are charged and adsorbed to the electrode. In the strong electric field, air molecules are ionized into positive ions and electrons, and the electrons encounter dust particles in the process of rushing to the positive elect...

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Problems solved by technology

[0009] (1) Although the technical solutions disclosed in the above patents solve the problems existing in the high-temperature oil and gas dust removal to a certain extent, as the filtration process proceeds, some tar precipitates are still combined with dust, forming or even rapidly forming ash cakes attached to the The surface of the filter body is easy to block the dust removal equipment quickly, which shortens the normal working time of one or a group of filters, especially in the process of industrial production with high air volume and high dust volume, which is not conducive to the stability of the entire interactive regeneration device , thereby greatly increasing the operation and maintenance costs

[0010] (2) "Method and equipment for filtering synthetic gas" disclosed in US patent US 09 / 271,741. However, this dust removal equipment is limited to dust removal of high-temperature gas with a small gas volume, such as thousands of m3 / h, For the filtration capacity of tens of thousands of m3 / h or even larger values, the technical solution disclosed in this patent is obviously powerless. First, the filtration area is too small, and it only provides a possible idea and idea for the laboratory stage

Second, the weak air intake is not easy to ensure the uniformity and consistency of the regeneration reaction of a large number of filters in the regeneration device, and it is impossible to obtain the balance of the reaction temperature

[0011] At present, there is no record of using electrostatic precipitator to solve the problem of solid-gas separation of high-temperature and high-dust oil and gas

In addition, regarding the situation of biomass pyrolysis, according to the currently retrieved situation, whether it is compressed block or bulk, the gas after pyrolysis also contains oil and high dust, and various dust collectors and their changes cannot Fundamentally solve the problem of dust removal in large volume, high temperature, high dust and high oil gas

In addition, a problem facing the technicians in the technical field is that in the process of dust removal of combustible gas, it is extremely dangerous to use electric dust removal, because in the process of electric dust removal, there will often be The phenomenon of discharge occurs due to the concentration, and the generation of sparks in combustible gas must be avoided by technicians in the technical field

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