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Co-production process for catalytic oxidation of PTA hydrogen extraction tail gas and methanol hydrogen production

A technology of methanol hydrogen production and catalytic oxidation, which is applied in hydrogen/synthesis gas production, hydrogen, hydrogen separation, etc., can solve the problems that the heat of PTA tail gas cannot be used reasonably, and the tail gas pollutes the environment, so as to reduce steam consumption and comprehensively Energy consumption reduction, device safety and reliability

Pending Publication Date: 2022-03-15
SICHUAN TECHAIRS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the heat in the PTA tail gas cannot be rationally utilized, and the exhausted tail gas will cause relatively large pollution to the environment. The present invention provides a combined catalytic oxidation of PTA hydrogen extraction tail gas and methanol hydrogen production. Production process

Method used

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  • Co-production process for catalytic oxidation of PTA hydrogen extraction tail gas and methanol hydrogen production
  • Co-production process for catalytic oxidation of PTA hydrogen extraction tail gas and methanol hydrogen production
  • Co-production process for catalytic oxidation of PTA hydrogen extraction tail gas and methanol hydrogen production

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Embodiment 1

[0036] refer to figure 1 , the present invention provides a co-production process of PTA hydrogen extraction tail gas catalytic oxidation and methanol hydrogen production, including methanol hydrogen production process and PTA hydrogen extraction tail gas catalytic oxidation process;

[0037] The methanol hydrogen production process is to pass the mixed liquid of methanol and water through the vaporization superheater 15, the converter 16, and the cooling separator 14 to obtain the medium gas, and pass the medium gas into the PSA-1 13 for separation, and most of the The hydrogen with higher purity and the remaining medium gas enter the tail gas buffer tank 12; the vaporization superheater 15 and the converter 16 are connected with heat conduction oil pipes; the heat conduction oil is circulated through the heat conduction oil pump 17.

[0038] The PTA hydrogen extraction tail gas catalytic oxidation process is to separate the pretreated PTA tail gas through the PSA-2 11 to sep...

Embodiment 2

[0041] refer to figure 1 , the present invention provides a co-production process of PTA hydrogen extraction tail gas catalytic oxidation and methanol hydrogen production, including methanol hydrogen production process and PTA hydrogen extraction tail gas catalytic oxidation process;

[0042] The methanol hydrogen production process is to pass the mixed liquid of methanol and water through the vaporization superheater 15, the converter 16, and the cooling separator 14 to obtain the medium gas, and pass the medium gas into the PSA-1 13 for separation, and most of the The hydrogen with higher purity and the remaining medium gas enter the tail gas buffer tank 12; the vaporization superheater 15 and the converter 16 are connected with heat conduction oil pipes; the heat conduction oil is circulated through the heat conduction oil pump 17.

[0043] The PTA hydrogen extraction tail gas catalytic oxidation process is to separate the pretreated PTA tail gas through the PSA-2 11 to separ...

Embodiment 3

[0046] refer to figure 1 , the present invention provides a co-production process of PTA hydrogen extraction tail gas catalytic oxidation and methanol hydrogen production, including methanol hydrogen production process and PTA hydrogen extraction tail gas catalytic oxidation process;

[0047] The methanol hydrogen production process is to pass the mixed liquid of methanol and water through the vaporization superheater 15, the converter 16, and the cooling separator 14 to obtain the medium gas, and pass the medium gas into the PSA-1 13 for separation, and most of the The hydrogen with higher purity and the remaining medium gas enter the tail gas buffer tank 12; the vaporization superheater 15 and the converter 16 are connected with heat conduction oil pipes; the heat conduction oil is circulated through the heat conduction oil pump 17.

[0048] The PTA hydrogen extraction tail gas catalytic oxidation process is to separate the pretreated PTA tail gas through the PSA-2 11 to sep...

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Abstract

The invention discloses a PTA (pure terephthalic acid) hydrogen extraction tail gas catalytic oxidation and methanol hydrogen production co-production process, which solves the problems that heat in PTA tail gas cannot be reasonably utilized, and the environment is greatly polluted, the tail gas generated in the methanol hydrogen production process and the tail gas after PTA hydrogen extraction enter a reactor, the reactor is connected with a heat conduction oil pipe, and the heat conduction oil pipe is communicated with the heat conduction oil pipe. The residual tail gas generated after methanol hydrogen production and the tail gas generated after PTA hydrogen extraction are subjected to a catalytic reaction with air entering the reactor in the reactor to generate carbon dioxide and water, heat is released, the released heat is used for heating flue gas, the heated flue gas is used for heating oil in the heat conduction oil pipe, and the oil in the heat conduction oil pipe is heated. And the heated conduction oil supplies heat to the vaporization superheater and the converter. The hydrogen production PSA tail gas catalytic oxidation reaction is utilized to form an independent catalytic reaction system, a steam heating system is not additionally adopted, catalytic reaction gas is directly adopted to heat conduction oil, then heat is provided for hydrogen production, and the energy-saving and environment-friendly effects are achieved.

Description

technical field [0001] The invention relates to the technical field of energy comprehensive utilization technology, and more specifically relates to the technical field of co-production technology of PTA hydrogen extraction tail gas catalytic oxidation and methanol hydrogen production. Background technique [0002] The production process of PTA requires hydrogen to participate in the reaction. Hydrogen is usually obtained by reforming methanol and water. Heat supply is required in the process of hydrogen production. Currently, high-pressure steam is used to supply heat to the methanol-hydrogen production system. After the PTA reaction is completed, the PTA tail gas contains hydrogen, carbon monoxide, carbon dioxide, nitrogen, acetic acid, methane, etc., which need to be further processed by the system to recover hydrogen. The usual methods are cooling, liquid separation, washing, oxygen removal, PSA hydrogen purification, and PSA tail gas discharge. to atmosphere. [0003] ...

Claims

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Application Information

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IPC IPC(8): C01B3/32C01B3/56C01B3/58B01D53/047
CPCC01B3/323C01B3/56C01B3/58B01D53/047C01B2203/042C01B2203/0838
Inventor 李园华汪兰海陈运钟雨明蒋强
Owner SICHUAN TECHAIRS
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