Dust removal device and method for oil gas during pulverized coal pyrolysis/retorting

Abstract

The invention provides a dust removal device and method for oil gas during pulverized coal pyrolysis / retorting. The device comprises a dust removal pretreatment unit, an oil gas filter and a sand-blasting tank which are sequentially connected, wherein the dust removal pretreatment unit comprises at least two stages of cyclone separators connected in series; the oil gas filter adopts a closed tank, and nozzles, venture tubes, an oil gas purification chamber, a gas collecting chamber and dust hoppers are arranged in the oil gas filer from top to bottom sequentially; the nozzles are arranged at the top of the tank and communicated with the outside; the venture tubes are correspondingly and perpendicularly arranged below the nozzles; the oil gas purification chamber is perpendicular to the venture tubes and provided with hollow filter element groups inside, and the hollow filter element groups are in sealing connection with an upper tube plate and a lower tube plate of the oil gas purification chamber; the gas collecting chamber is coaxially communicated with filter elements; dust valves are arranged at the lower ends of the dust hoppers; the sand-blasting tank is a closed tank, a sand inlet is formed in the top and communicated with a sand pipeline inlet through a sand preheater, gas inlets are formed in the top and in the lower side part respectively and are communicated with a reverse blowing gas pipeline inlet through a reverse blowing gas preheater, and a sand outlet is formed in the bottom and communicated with the oil gas filter. The problems of poor oil gas dust removal effect, low efficiency, instable operation and the like of an existing device are solved.

Description

technical field [0001] The invention belongs to the technical field of high-temperature dry dedusting of dusty oil and gas in coal chemical industry, and in particular relates to a dedusting device and a dedusting method for high-temperature oil and gas produced in the process of producing coal tar by pyrolysis / carbonization of pulverized coal. Background technique [0002] In recent years, with the improvement of coal mining mechanization, the proportion of pulverized coal is increasing, and the market price of pulverized coal is only one-third of the price of lump coal. If pulverized coal is used as raw material to produce chemical products, the advantages are obvious, but pulverized coal is hot There is still no effective separation means for the separation technology of oil gas and coke powder in the process of hydrolysis or dry distillation, which seriously restricts the development of this industry. [0003] At present, the separation methods of coke powder and oil and...

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Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention lies in the problems such as poor separation effect of coke powder and oil gas, low efficiency and unstable operation in the process of filtering and separating pulverized coal pyrolysis / carbonization oil gas in the dusty oil gas dedusting device in the prior art, and then Provide a pulverized coal pyrolysis / carbonization oil and gas dedusting device with ideal separation effect, stable and safe operation and high efficiency

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