A method for regeneration of molecular sieves in a syngas cold box and a gas distributor

A gas distribution plate, molecular sieve technology, applied in separation methods, selection of absorbent solid gas purification, gas treatment and other directions, can solve the problems of Fischer-Tropsch side reactions, potential safety hazards, molecular sieve failure, etc., to achieve uniform airflow distribution, Improve the effect of adsorption and regeneration

Active Publication Date: 2020-11-24
WANHUA CHEM GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the hydrogen-rich gas in the cold box contains hydrogen and CO, it is used for the regeneration of molecular sieves under high temperature and high pressure, which is prone to Fischer-Tropsch side reactions, producing alkanes and causing molecular sieves to fail, posing a safety hazard

Method used

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  • A method for regeneration of molecular sieves in a syngas cold box and a gas distributor
  • A method for regeneration of molecular sieves in a syngas cold box and a gas distributor
  • A method for regeneration of molecular sieves in a syngas cold box and a gas distributor

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Embodiment 1

[0057] Such as figure 1 As shown, a molecular sieve tank with a diameter of 2m and a height of 4m, the molecular sieve tank includes a tank body, the tank body is provided with a process gas inlet valve 1 at the top of the tank body and a process gas outlet valve 8 at the bottom of the tank body, the tank body The top is provided with a pressure relief pipeline 2 connected to the pressure relief valve, and 8 plasma torches 9 ( figure 1 Not all are drawn in), the plasma torch 9 is a straight-line plasma torch, and is respectively connected with the corresponding working gas pipeline 7, and the plasma torch 9 is installed on the tank body through the flange, and the working gas is hydrogen with a volume content of 87%. and hydrogen-rich gas with a volume content of 13% carbon monoxide; the inside of the tank is provided with a gas distribution plate 5, a molecular sieve bed 4 and a wire mesh 3, the molecular sieve bed 4 is located above the gas distribution plate 5, and the wire...

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Abstract

The present invention provides a gas distribution plate, the gas distribution plate includes a support ring, a support beam and a main body of the distribution plate, the support ring is connected with the support beam to form a support skeleton for supporting the main body of the gas distribution plate; There are n support beams, one end of the support beam is connected to the inner edge of the support ring, and the other end is connected to each other, so that the support beam and the support ring form a conical surface; the main body of the distribution plate includes m layers of distribution Each layer of the distribution plate is an annular plate composed of n fan ring plates of uniform size, the annular plate is connected to the support beam, and the distribution plates of each layer are distributed in a stepped shape along the conical surface. The gas distribution plate is conducive to the uniform distribution of gas. Based on the gas distribution plate, the present invention also provides a molecular sieve regeneration method. The method uses the gas distribution plate of the present invention to improve the regeneration rate and effect of the molecular sieve by using low-temperature plasma, and at the same time prevents hydrogen-rich gas from producing side effects under high temperature and high pressure. reaction.

Description

technical field [0001] The invention belongs to the technical field of synthesis gas separation, and relates to a synthesis gas cold box molecular sieve regeneration gas method and a matching regeneration gas distributor. Background technique [0002] The synthesis gas produced by coal gasification is purified by a low-temperature methanol washing system, and then sent to a cold box (-153°C) to separate hydrogen and carbon monoxide. Since there is a small amount of methanol in the synthesis gas, directly entering the cold box will cause freezing and blockage, so the upstream of the cold box is equipped with a molecular sieve for adsorbing methanol, which is generally one open and one standby. A single molecular sieve needs to be cut out and regenerated after adsorption and saturation. In the traditional process, hot nitrogen is used for regeneration, and the methanol adsorbed on the molecular sieve is desorbed, and then sent to the torch for treatment with nitrogen. Due to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/34
CPCB01D53/04B01D2253/108B01D2259/40083C10K1/32
Inventor 胡耀峰王阳郝成浩洪鹏张宏科
Owner WANHUA CHEM GRP CO LTD
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