Method for preparing oxygenous fuel by coal synthesis gas slurry bed

Abstract

The invention relates to a method for preparing oxygenous fuel by a coal synthesis gas slurry bed. According to the method, a solid catalyst and inert liquid molten paraffin are placed in a slurry bed reactor from the bottom to the liquid level of the reactor, synthesis gas tangentially and swirlingly enter the slurry bed reactor and reacts in a bubble form to form a gas, liquid and solid fluidized form, then the obtained product is processed by a gas-liquid separator and a heat exchanger and the processed product is discharged from an outlet; cold water enters the reactor from the lower part, a natural convection recirculation zone is formed on the inner surface of a membrane water cooled wall, heat is absorbed by the membrane water cooled wall, and then the obtained product is discharged by the heat exchanger through a high-temperature hot water outlet of the reactor. The method adopts a plurality of spray nozzles to enable slurry to take the swirling motion so as to enable bubbles to spirally ascend, thereby reinforcing a stirring function and increasing contact time with slurry by 1.2 to 1.8 times; moreover, temperature difference of the slurry is between 4 DEG C and 8 DEG C, so that reaction efficiency of the reactor is greatly improved.

Description

technical field [0001] The invention relates to a method for producing oxygen-containing fuel in a slurry bed of coal synthesis gas, in particular to a method for producing oxygen-containing fuel in an external swirling slurry bed of coal synthesis gas. Background technique [0002] The gas-liquid-solid three-phase slurry bed reactor has the characteristics of simple structure, uniform dispersion effect, and excellent transfer performance. The huge development potential of equipment in coal chemical industry and other fields. [0003] Publication No. CN1593740A is an invention patent of "high-efficiency slurry bed reactor", in which distribution plates, heating plates, and inner sleeve components are arranged in the reactor; ZL200910209536.3 discloses a slurry bed reactor, Built-in filter components are used; ZL201010125941.X discloses a slurry bed reactor, which uses a built-in cyclone and heat-absorbing coil; the above patents use a built-in heat exchange and separation m...

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Problems solved by technology

[0003] Publication No. CN1593740A is an invention patent of "high-efficiency slurry bed reactor", in which distribution plates, heating plates, and inner sleeve components are arranged in the reactor; ZL200910209536.3 discloses a slurry bed reactor, Built-in filter components are used; ZL201010125941.X discloses a slurry bed reactor, which uses a built-in cyclone and heat-absorbing coil; the above patents use a built-in heat exchange and separation method, and the disturbance capacity of the fluid needs to be strengthened. The main problems of reactor enlargement: blockage of distributor, countercurrent, uneven distribution of catalyst and temperature, etc. The increase of diameter will change the fluid flow characteristics inside the reactor, thereby affecting the quality and heat transfer; and after the diameter increases, the inside of the reactor The heat is difficult to remove in time, and the temperature distribution in the reactor is not uniform, which is not conducive to maintaining the reaction rate and improving the life of the catalyst. The existing slurry bed reactor still has bias flow, channel flow and blockage of bed components, and the gas-solid flow of the system has not been considered. , gas-liquid separation factors, in view of the above problems, the present invention proposes a method for producing oxygenated fuel in a slurry bed of coal synthesis gas

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