Continuous separation device for oil and water in pyrolysis gas

Abstract

The invention discloses a continuous separation device for oil and water in pyrolysis gas. The continuous separation device comprises a shell-and-tube heat exchanger, a spraying device and a centrifugal separation device which are connected in sequence, wherein the shell-and-tube heat exchanger is provided with an inner-layer tube and a shell; the inner-layer tube is provided with a pyrolysis gasinlet and a pyrolysis gas outlet; the shell is provided with a cooling medium inlet and a cooling medium outlet; the sprinkling device is connected with the pyrolysis gas outlet; the spraying device is provided with a condensing device, a pyrolysis gas purifying outlet and an oil outlet; the pyrolysis gas can be upwards discharged through the pyrolysis gas purifying outlet after passing through the condensing device; a liquid matter generated after condensation of the pyrolysis gas can downwards flow in the centrifugal separation device through the oil outlet; the centrifugal separation deviceis provided with a centrifugal shell, a rotor, a pyroligneous liquid outlet and a tar outlet; the rotor drives the centrifugal shell to rotate; the inner side of the upper end of the centrifugal shell is connected with the pyroligneous liquid outlet, and the outer side is connected with the tar outlet. According to the continuous separation device disclosed by the invention, continuous separationon tar and pyroligneous liquid in the pyrolysis gas can be realized by adopting a physical method, high-temperature pyrolysis is not required, and the requirements on the technology are reduced.

Description

technical field [0001] The invention relates to the technical field of separation devices, in particular to a continuous separation device for oil and water in pyrolysis gas. Background technique [0002] The pyrolysis technology using biomass as raw material can realize clean and efficient conversion of energy. The high-temperature gas produced by biomass pyrolysis is called biomass pyrolysis gas. After dust removal, condensation, decoking and other processes, non-condensable gas is obtained respectively. Substance Fuel gas and condensable gas. The condensable gas is mainly biomass tar, wood vinegar and water vapor, and the main components of biomass gas are CO, CO 2 、H 2 , N 2 、CH 4 etc., because it also contains a certain amount of C 2 h 6 、C 3 h 8 、C 2 h 4 and C 3 h 6 Such macromolecular high-calorific value gas has a higher calorific value than biomass pyrolysis gasification gas, and can be directly burned for heat-using equipment. Biomass tar, as a by-prod...

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Problems solved by technology

[0004] However, in the research on tar removal technology, most of them use cracking method, which requires higher temperature, stricter process requirements, and poor economical practicability.

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