Gas-liquid distributor for wood tar ebullating bed reactor

Abstract

The invention discloses a gas-liquid distributor for a wood tar fluidized bed reactor, which is mainly composed of a central pipe, a bubble cap, a non-return ball, a conical ball seat and a limit seat; the bubble cap is an open bottom The cylinder is covered on the upper end of the central tube and is fixedly connected with the central tube. There is a material outlet on the tube wall at the upper end of the central tube. The limit seat is set in the central tube below the material outlet. On the wall of the central tube below the seat, there is a non-return ball on the conical ball seat, and the bubble cap, the central tube, the limit seat, the non-return ball and the conical ball seat are coaxially arranged, and the gap between the bubble cap and the central tube A circular channel is formed, and the lower end of the central tube is provided with a material inlet. Adoption of the present invention can not only ensure that the gas is broken into continuous microbubbles in the liquid, but also effectively solve or alleviate the problem of countercurrent blockage of the material carrying the catalyst when the gas-liquid pressure is unstable or the gas-liquid feeding is suddenly interrupted, and at the same time reduce the The flow dead zone inside the distributor is eliminated, and the pressure drop is small.

Description

technical field [0001] The invention relates to the field of reactor internals, in particular to a gas-liquid distributor for wood tar ebullating bed reactors. Background technique [0002] Biomass pyrolysis technology can convert low-grade biomass energy (woody raw materials, crop waste) into higher-quality liquid biomass tar (wood tar), and the liquid tar yield of this technology is as high as 65-70%. The produced biomass tar has a complex composition, high moisture content, high corrosiveness, low calorific value, instability and easy condensation, and is difficult to miscible with petroleum products (such as gasoline, diesel, etc.). Since the end of the 1990s, countries around the world have successively started research on the technology of refining fuel oil from biomass tar, among which ebullating bed hydrocracking is considered to be one of the methods with the most potential for development. [0003] The gas-liquid-solid three-phase ebullating bed reactor has been w...

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Problems solved by technology

[0010] In order to solve the problems of the prior art that the non-return ball bounces greatly and wears seriously, which affects the return sealing effect, when the lower edge of the bubble cap is open, the flow momentum is small, the air bubbles are large, and the probability of catalyst backflow due to shutdown is relatively high, etc. Technical problem, the present invention provides a gas-liquid distributor for wood tar fluidized bed reactor

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