Device and method for making shifted gas for synthesis of ammonia synthesis poly-generation methanol

A technology for methanol synthesis and gas shift, applied in hydrogen/synthesis gas production, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of passive urea production, reduction of medium-pressure superheated steam, unfavorable production costs, etc. High efficiency and precision, reduced COS content, high quality steam and more effects

Active Publication Date: 2016-05-11
HENAN XINLIANXIN FERTILIZER +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in this case, since the CO content of the gas from the second shift furnace is low, the amount of crude gas required is relatively large, so that the crude gas passing through the first shift furnace will be correspondingly reduced, and the high-temperature gas from the first shift furnace will also be reduced. The corresponding reduction will eventually lead to a reduction in the amount of medium-pressure superheated steam generated by heat exchange with high-temperature gas
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Method used

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  • Device and method for making shifted gas for synthesis of ammonia synthesis poly-generation methanol
  • Device and method for making shifted gas for synthesis of ammonia synthesis poly-generation methanol

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Example Embodiment

[0044] Example one

[0045] A method for preparing shift gas for ammonia synthesis polygeneration methanol synthesis, including the following steps:

[0046] 1. The raw gas saturated with steam from the gasification water scrubber 1 is divided into two parts. One part passes through the third end of the fifth tee 25 and enters the gas-liquid separator 2, and the other part passes through the fifth tee 25 and the third end. A self-regulating valve 15, the first three-way 20 and the second three-way 21 are connected to the second heat and condensate recovery unit 22; the temperature of the crude gas is: 225~240℃, and the pressure is: 5.3~8.5Mpa, The volume fraction of carbon monoxide: 40-55%;

[0047] 2. After the crude coal gas entering the gas-liquid separator 2 is separated in gas-liquid in step 1, the water in the liquid phase enters the gasification through the liquid phase outlet at the bottom of the gas-liquid separator 2, the condensate pump 28 and the inlet of the gasificatio...

Example Embodiment

[0059] Example two

[0060] A method for preparing shift gas for ammonia synthesis polygeneration methanol synthesis, including the following steps:

[0061] 1. The raw gas saturated with steam from the gasification water scrubber 1 is divided into two parts. One part passes through the third end of the fifth tee 25 and enters the gas-liquid separator 2, and the other part passes through the fifth tee 25 and the third end. A self-regulating valve 15, the first three-way 20 and the second three-way 21 are connected to the second heat and condensate recovery unit 22; the temperature of the crude gas is: 225~240℃, and the pressure is: 5.3~8.5Mpa, The volume fraction of carbon monoxide: 40-55%;

[0062] 2. After the crude coal gas entering the gas-liquid separator 2 is separated in gas-liquid in step 1, the water in the liquid phase enters the gasification through the liquid phase outlet at the bottom of the gas-liquid separator 2, the condensate pump 28 and the inlet of the gasificatio...

Example Embodiment

[0074] Example three

[0075] A method for preparing shift gas for ammonia synthesis polygeneration methanol synthesis, including the following steps:

[0076] 1. The raw gas saturated with steam from the gasification water scrubber 1 is divided into two parts. One part passes through the third end of the fifth tee 25 and enters the gas-liquid separator 2, and the other part passes through the fifth tee 25 and the third end. A self-regulating valve 15, the first three-way 20 and the second three-way 21 are connected to the second heat and condensate recovery unit 22; the temperature of the crude gas is: 225~240℃, and the pressure is: 5.3~8.5Mpa, The volume fraction of carbon monoxide: 40-55%;

[0077] 2. After the crude coal gas entering the gas-liquid separator 2 is separated in gas-liquid in step 1, the water in the liquid phase enters the gasification through the liquid phase outlet at the bottom of the gas-liquid separator 2, the condensate pump 28 and the inlet of the gasificat...

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Abstract

The invention belongs to a device and method for making shifted gas for synthesis of ammonia synthesis poly-generation methanol. The device comprises a mechanical part and a control part. The mechanical part comprises a gasification washing tower, an outlet of the gasification washing tower is connected with an inlet of a second heat and condensate recycling unit through a pipe, the pipe between the outlet of the gasification washing tower and the second heat and condensate recycling unit is sequentially provided with a fifth tee joint, a first self-regulating valve, a first tee joint and a second tee joint, an outlet of the second heat and condensate recycling unit is connected with an inlet in the middle of a second ammonia-washing tower, and a gas phase outlet in the top of the second ammonia-washing tower is connected with an inlet in the lower portion of a shifted gas washing tower for synthesis of methanol through a pipe; the control part comprises a first online analysis and calculation display instrument, a second online analysis and calculation display instrument, a second self-regulating valve and a third self-regulating valve. The device and method have the advantages that matching efficiency and accuracy are high, a great number of regulating means are adopted, a great amount of high-quality steam is generated, and meanwhile the content of COS in the methanol removing and washing shifted gas is lowered.

Description

technical field [0001] The invention belongs to the technical field of coal chemical production, and in particular relates to a preparation device and a preparation method of shift gas for ammonia synthesis polygeneration methanol synthesis. Background technique [0002] In the present ammonia synthesis and multi-link methanol detection device, when the shift gas for methanol synthesis is produced in the shift section, a certain amount of crude gas is generally used to mix and prepare the gas after the second shift furnace in accordance with (H 2 -CO 2 ) / (CO+CO 2 )=2.05~2.1 shift gas. But in this case, since the CO content of the gas from the second shift furnace is low, the amount of crude gas required is relatively large, so that the crude gas passing through the first shift furnace will be correspondingly reduced, and the high-temperature gas from the first shift furnace will also be reduced. The corresponding reduction will eventually lead to a reduction in the amount...

Claims

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Application Information

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IPC IPC(8): C01B3/12
CPCC01B3/12C01B2203/0288C01B2203/061C01B2203/068C01B2203/1671
Inventor 刘伟杨国洞王洪营吴培张泽海渠会丽许世方崔玉彪
Owner HENAN XINLIANXIN FERTILIZER
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