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A process method for transforming and cooling CO gas using a device for transforming and cooling CO gas

A process method and gas transformation technology, applied in chemical instruments and methods, chemical industry, climate sustainability, etc., can solve problems such as inability to meet requirements, low heat recovery rate, low efficiency, etc. High recovery rate and thickness reduction effect

Active Publication Date: 2017-01-11
QITAIHE BAOTAILONG COAL CHEM IND
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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 existing CO gas conversion and cooling process to convert CO gas into H 2 The efficiency is low and cannot meet the requirements for H in methanol synthesis. 2 Requirements and low heat recovery rate, and provide a CO gas conversion and cooling device using CO gas conversion and cooling process method

Method used

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  • A process method for transforming and cooling CO gas using a device for transforming and cooling CO gas

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specific Embodiment approach 1

[0031] Specific Embodiment 1: This embodiment is a process method for converting and cooling CO gas using a CO gas conversion and cooling device, which is completed in the following steps:

[0032] Pass the crude gas with a temperature of 90°C and a pressure of 4.0MPa in the crude gas compressor 1 into the degreaser 2 for degreasing, and the crude gas after degreasing through the degreaser 2 passes through the first inlet of the preheating converter Terminal 3-1 enters the preheating converter 3, the raw gas in the preheating converter 3 exchanges heat with the shifted gas from the sub-medium pressure waste heat recovery device 5 to 160°C, and the crude gas with a temperature of The first outlet port 3-3 of the heat exchanger and the first inlet port 4-1 of the main heat exchanger enter the main heat exchanger 4, and the crude gas with a temperature of 160°C in the main heat exchanger 4 and the waste heat from the medium pressure The shift gas in the recoverer 6 is heat-exchan...

specific Embodiment approach 2

[0056] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the temperature is 400°C, and the shift gas with a CO content of 27% to 28% enters the medium-pressure gas from the outlet end of the first shift furnace 7 In the waste heat recovery device 6, it is cooled to 300°C in the medium-pressure waste heat recovery device 6, and 4.9MPa of saturated steam is produced as a by-product, and the production rate of saturated steam is 17t / h. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0057] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the shift gas with a temperature of 300°C and a CO content of 18.6% comes out of the second shift furnace 9 and enters the secondary In the medium-pressure waste heat recovery device 5, the sub-medium-pressure waste heat recovery device 5 is cooled to 280°C, and 2.6 MPa of saturated steam is produced as a by-product, and the production rate of saturated steam is 10.2t / h. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a process method for converting and cooling CO gas by virtue of a CO gas conversion and cooling device, relating to a CO gas converting process method. The invention aims to solve the problems of the existing CO gas converting and cooling process method that the efficiency of conversion of CO gas into H2 is low and cannot meet the demand on H2 during methanol synthesis and the heat recovery rate is low. According to the process method for converting and cooling CO gas, disclosed by the invention, from a raw gas compressor, raw gas sequentially enters a degreaser, a preheating convertor, a primary heating convertor, a first shift converter, a medium-pressure afterheat recoverer, another primary heating convertor, a separator, a second shift converter, a secondary medium-pressure afterheat recoverer, another preheating convertor, a boiler fed water preheater, a desalted water preheater, a cooler, an ammonia washing separation tower, a stripping tower, a condensate heat exchanger, a condensate cooler, a final cooler and a gasifying circulating pipe to be subjected to conversion reaction. The process is applicable to conversion reaction.

Description

technical field [0001] The invention relates to a conversion process method of CO gas. Background technique [0002] Affected by the increasingly tense oil resources in recent years, my country's coal chemical industry has entered a stage of rapid development. In view of the fact that entrained bed coal gasification technology has many advantages such as low requirements on coal quality, high effective components of syngas and low operating costs, it has become a key field for the development of modern coal gasification technology. [0003] The CO shift process is widely used in ammonia synthesis units and hydrogen production units. It is a major part of the purification process, and its process position is set after the gasification or conversion process. Different transformation processes are mainly reflected in changes in the number of transformation reaction stages, reaction temperature, and heat recovery, which mainly depend on the performance of the transformation cat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/12
CPCY02P20/10Y02P20/129
Inventor 李毓良李军徐海军王彦君于学洋郝立伟
Owner QITAIHE BAOTAILONG COAL CHEM IND