Preparation device and preparation method of shift gas for ammonia synthesis co-production methanol synthesis

A technology for methanol synthesis and gas shift, which is applied in hydrogen/synthesis gas production, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of passive urea production, unfavorable production costs, and reduction of medium-pressure superheated steam, and achieves a proportion of High efficiency and precision, high quality steam volume, and the effect of reducing COS content

A technology for methanol synthesis and gas shift, which is applied in hydrogen/synthesis gas production, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of passive urea production, unfavorable production costs, and reduction of medium-pressure superheated steam, and achieves a proportion of High efficiency and precision, high quality steam volume, and the effect of reducing COS content

CN105565269BActive Publication Date: 2018-05-18HENAN XINLIANXIN FERTILIZER +2
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  • Preparation device and preparation method of shift gas for ammonia synthesis co-production methanol synthesis
  • Preparation device and preparation method of shift gas for ammonia synthesis co-production methanol synthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for preparing ammonia synthesis co-production methanol synthesis shift gas, comprising the following steps:

[0046]1. The crude gas saturated with steam from the gasification water washing tower 1 is divided into two parts, one part enters the gas-liquid separator 2 through the third end of the fifth three-way 25, and the other part passes through the fifth three-way 25 and the third 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°C, the pressure is: 5.3-8.5Mpa, Volume fraction of carbon monoxide: 40-55%;

[0047] 2. After the crude gas entering the gas-liquid separator 2 described in step 1 is separated from the gas and liquid, 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 gasification water w...

Embodiment 2

[0060] A method for preparing ammonia synthesis co-production methanol synthesis shift gas, comprising the following steps:

[0061] 1. The crude gas saturated with steam from the gasification water washing tower 1 is divided into two parts, one part enters the gas-liquid separator 2 through the third end of the fifth three-way 25, and the other part passes through the fifth three-way 25 and the third 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°C, the pressure is: 5.3-8.5Mpa, Volume fraction of carbon monoxide: 40-55%;

[0062] 2. After the crude gas entering the gas-liquid separator 2 described in step 1 is separated from the gas and liquid, 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 gasification water ...

Embodiment 3

[0075] A method for preparing ammonia synthesis co-production methanol synthesis shift gas, comprising the following steps:

[0076] 1. The crude gas saturated with steam from the gasification water washing tower 1 is divided into two parts, one part enters the gas-liquid separator 2 through the third end of the fifth three-way 25, and the other part passes through the fifth three-way 25 and the third 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°C, the pressure is: 5.3-8.5Mpa, Volume fraction of carbon monoxide: 40-55%;

[0077] 2. After the crude gas entering the gas-liquid separator 2 described in step 1 is separated from the gas and liquid, 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 gasification water ...

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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

Patent Timeline
18 May 2018
Publication
CN105565269B
IPC
C01B3/12
CPC
C01B3/12; C01B2203/0288; C01B2203/061; C01B2203/068; C01B2203/1671
Inventors
刘伟; 杨国洞