A gas-liquid distributor for wood tar fluidized bed reactor

Abstract

The invention discloses a gas-liquid distributor used for a wood tar fluidized bed reactor, the gas-liquid distributor is mainly composed of a center pipe, a bubble cap, a non-return ball, a taper ball seat and a limit seat; the bubble cap is a cylindrical matter with a bottom opening, covers the upper end of the center pipe, and is fixedly connected with the center pipe, the limit seat is arranged on the top of the bubble cap, and located in the center pipe, a material outlet is arranged on the pipe wall of the center pipe located below the limit seat, the taper ball seat is arranged on the pipe wall of the center pipe located below the material outlet, the non-return ball is arranged on the taper ball seat, the bubble cap, the center pipe, the limit seat, the non-return ball and the taper ball seat are coaxially arranged, an annular channel is formed between the bubble cap and the center pipe, and the lower end of the center pipe is provided with a material inlet. The gas-liquid distributor can not only guarantee a gas is broken into continuous micro bubbles in a liquid, and can effectively solve or ease countercurrent congestion problem of a catalyst-carrying material when gas and liquid pressure is instable or gas and liquid material feed is suddenly interrupted, at the same time, an internal flow dead zone in the distributor is reduced, and the pressure drop is smaller.

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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