A device and conversion method for removing and converting tar in biomass synthesis gas

Abstract

The invention provides a device for removing and converting tar in a biomass synthesis gas and a conversion method. The device comprises a tar removal reactor, wherein the tar removal reactor is connected with a synthesis gas inlet pipe, a purified synthesis gas outlet pipe, an air inlet pipe, a smoke outlet pipe, a cooling water inlet pipe and a cooling water outlet pipe separately; the air inlet pipe is connected with an air preheater; a group of sleeve type reaction tubes are arranged in the tar removal reactor; each sleeve type reaction tube comprises an inner tube and an outer tube; each inner tube communicates with the cooling water inlet pipe and the cooling water outlet pipe; each outer tube is a gas-permeable filter tube; each filter is loaded with a catalyst for catalyzing tar oxidation; and an annular space formed by the inner tubes and the outer tubes communicates with the synthesis gas inlet pipe and the smoke outlet pipe. Removal and purification of the synthesis gas and tar energy utilization are achieved, an adsorbent is regenerated and the utilization of biomass can be improved.

Description

[0001] Technical field: [0002] The invention relates to a device and a conversion method for removing and converting tar in biomass synthesis gas, belonging to the technical field of biomass resource utilization. [0003] Background technique: [0004] Biomass gasification to produce synthesis gas or hydrogen-rich gas is one of the important ways of biomass thermochemical conversion and utilization. At present, the key problem in practical application is that the presence of tar in the gas product will easily lead to pipeline blockage and affect the normal operation of downstream equipment. operation, and reduces the effective utilization of biomass. [0005] At present, the main technologies for tar removal and purification include physical methods and chemical methods. Physical methods mainly include gas wet scrubbing, gas dry filtration and electrostatic removal. Wet water washing or liquid absorbents have good tar removal ability, but the purification process not only w...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems in the prior art that the removal of tar is difficult, and the adsorbent is easy to block and difficult to regenerate, and proposes a device and conversion method for the removal and conversion of tar in biomass synthesis gas, and the tar is synthesized by dry adsorption The gas is purified, and then the tar is catalyzed and oxidized in situ to regenerate the adsorbent. At the same time, the energy released by the tar is used to produce water vapor to realize the utilization of tar energy.

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