Dust removal device and method for oil and gas containing dust

Abstract

The invention discloses a dust removal device and method for oil and gas containing dust. The dust removal device comprises a multi-stage cyclone separation system and a filter type catalytic separation system. An air inlet of the multi-stage cyclone separation system is used for introducing the oil and gas containing the dust, and an air outlet of the multi-stage cyclone separation system is in communication with an air inlet of the filter type catalytic separation system. An air outlet of the filter type catalytic separation system is used for outputting clean oil and gas after dust removal.A filter material of the filter type catalytic separation system is an inorganic membrane filtration material. The multi-stage cyclone separation system comprises a plurality of cyclone separators which communicate in sequence. One or more stages of catalytic sieve plates is or are arranged in a cylinder body of each of the cyclone separators in the tangential direction of cyclone flow. The catalytic sieve plates are of porous plate structures, and the surfaces of the catalytic sieve plates are loaded with catalysts. The dust removal device and method can realize the fractional separation coupling synchronous catalysis of high-temperature and high-dust oil and gas, and can realize the conversion of oil and gas macromolecular volatiles to small molecules while removing particulate dust.

Description

technical field [0001] The invention belongs to the technical field of resource recovery of fine particle organic matter and gas-solid separation, and in particular relates to a dust removal device and a dust removal method for dusty oil and gas. Background technique [0002] The pyrolysis technology of organic matter (such as coal and biomass) is one of the important ways for efficient and clean resource utilization. Taking coal as an example, coal pyrolysis technology is the core technology for clean and efficient conversion of coal, but the coke powder and ash particles contained in oil and gas during the coal pyrolysis process are one of the main factors restricting the clean pyrolysis utilization of coal. In the pyrolysis of pulverized coal, the content of particulate matter is large, and the composition of coal pyrolysis oil is complex, of which more than 80% are aromatic compounds. These macromolecular hydrocarbons are very easy to condense, and the pyrolysis oil is e...

AI Technical Summary

Problems solved by technology

At present, multi-stage wet combined separation and cyclone separation technologies are generally used in actual projects in my country, which have problems such as large pollution, high energy consumption, and cumbersome follow-up treatment, and the pressure drop of cyclone dust collectors is generally high. The collection efficiency is low, so the general cyclone dust collector can only be used as a pre-dust removal equipment

Filtration and dust removal technology has become a research hotspot in the field of high temperature dust removal due to its low heat loss and high efficiency. However, the existence of a large amount of fine coke powder in actual operation causes high load operation of the filter material, so the load intensity of the filter material is reduced and the filter material is extended. Filtration stability is a key issue to be solved in the field of coal chemical industry

In addition, during the process of coal pyrolysis, the pyrolysis oil and gas contain a large amount of macromolecular volatiles. These macromolecular volatiles are easy to condense or form soot at higher temperatures, and adhere to the surface of the filter material or deposit on the aggregate of the filter material. In the channel, the pressure drop between the inner and outer layers of the membrane tube increases

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