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A post treatment process containing a fast gas-solid separation structure after plasma coal cracking

A technology of plasma and coal cracking, which is applied in the post-processing field of plasma coal cracking process, can solve the problems of reducing cooling efficiency and consuming cooling water, and achieve the effect of improving cooling efficiency, improving comprehensive value, and increasing product added value

Active Publication Date: 2009-10-07
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the pyrolysis product contains a large amount of solids, the cooling efficiency is reduced and a large amount of cooling water is consumed

Method used

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  • A post treatment process containing a fast gas-solid separation structure after plasma coal cracking

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Experimental program
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Effect test

Embodiment 1

[0024] The plasma torch uses hydrogen as the working gas, the input power is 3.8-4.2MW, the hydrogen flow is 100-110kg / h, the average temperature of the hydrogen plasma exceeds 3000K, and the temperature in the center area is 5000-6000K. The temperature of the cracked product is 1200-1500K, the speed is 150-200m / s, the cracked product enters the fast separation device (the gas-solid separation device disclosed in the patent CN1267564 in the prior art), the gas residence time is 80ms, and the solid phase residence time is the separation efficiency 75%. The gas separated at the gas outlet, that is, the intermediate product in the gas phase, enters the quenching device, and is quickly cooled with circulating water to reduce to room temperature (thereby terminating the thermal decomposition of the product, increasing the acetylene content in the cracked gas, and avoiding the decomposition reaction of acetylene at high temperature) to obtain the volume content 10% acetylene gas mixture...

Embodiment 2

[0026] The plasma torch uses hydrogen as the working gas, the input power is 3.8-4.2MW, the hydrogen flow is 100-110kg / h, the average temperature of the hydrogen plasma exceeds 3000K, and the temperature in the center area is 5000-6000K. The temperature of the cracked product is 1200-1500K, the speed is 150-200m / s, the cracked product enters the fast separation device (the gas-solid separation device disclosed in the patent CN1267564 in the prior art), the gas residence time is 80ms, and the solid phase residence time is the separation efficiency 75%. The gas separated at the gas outlet, that is, the intermediate product in the gas phase, enters the quenching device, and is quickly cooled with circulating water to reduce to room temperature (thereby terminating the thermal decomposition of the product, increasing the acetylene content in the cracked gas, and avoiding the decomposition reaction of acetylene at high temperature) to obtain the volume content 10% acetylene gas mixture...

Embodiment 3

[0028] The plasma torch uses hydrogen as the working gas, the input power is 3.8-4.2MW, the hydrogen flow is 100-110kg / h, the average temperature of the hydrogen plasma exceeds 3000K, and the temperature in the center area is 5000-6000K. The temperature of the cracked product is 1200-1500K, the speed is 150-200m / s, the cracked product enters the fast separation device (the gas-solid separation device disclosed in the patent CN1267564 in the prior art), the gas residence time is 80ms, and the solid phase residence time is the separation efficiency 75%. The gas separated from the gas outlet, that is, the intermediate product in the gas phase, enters the quenching device, and is quickly cooled with propane to reduce to room temperature (thereby terminating the thermal decomposition of the product, increasing the acetylene content in the cracked gas, and avoiding the decomposition reaction of acetylene at high temperature) to obtain the acetylene volume content 6% and 9% ethylene volu...

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Abstract

The present invention discloses a post treatment process containing a fast gas-solid separation structure after plasma coal cracking, which pertains to the technical field of coal chemical industry. This process includes: a) through a fast gas-solid separation device, gas-phase intermediate and solid-phase intermediate are obtained from the reaction products of plasma coal cracking; b) the gas-phase intermediate enters a quenching unit to obtain acetylene-containing cracking gas; c) the solid-phase intermediate enters another reactor to further react with water or hydrogen; d) the heat obtained from the reaction of the solid-phase intermediate provides partial electricity for plasma generator. The present invention may raise the acetylene content of cracking gas product, the overall coal conversion rate and the comprehensive value of the process and is applicable to the post treatment of high-temperature, high-flowrate gas-solid mixture.

Description

Technical field [0001] The invention relates to a plasma coal cracking process post-treatment process containing a gas-solid fast separation structure, and belongs to the technical field of coal chemical industry. Background technique [0002] Acetylene is an important basic organic chemical raw material. The industrial methods for producing acetylene mainly include calcium carbide method, partial methane oxidation method and methane arc cracking method. The calcium carbide method acetylene process is mature and accounts for an absolute proportion in industrial production, but pollution and energy consumption are relatively high. [0003] Plasma pyrolysis of coal to acetylene is a new and promising way of direct chemical conversion of coal. The related research began in the 1960s at the University of Sheffield in the United Kingdom: in the arc thermal plasma jet with high temperature, high enthalpy and high reactivity, The volatile matter and even fixed carbon of coal can be dire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/24B01D45/06
CPCY02P20/10
Inventor 程易章莉吴昌宁颜彬航双玥金涌
Owner TSINGHUA UNIV
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