Technology for transforming high Co raw gas obtained through pulverized coal pressure gasification

A pulverized coal pressurized gasification and crude gas technology, applied in the chemical industry, sustainable manufacturing/processing, inorganic chemistry, etc., can solve the problems of overheating of the main reactor, wasting heat energy, affecting industrial production, etc., and achieve a reduction in system The effect of reducing resistance, reducing external steam supply, and preventing overheating

Active Publication Date: 2015-02-11
CHANGZHENG ENG
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Problems solved by technology

[0004] At present, the traditional CO sulfur-resistant conversion process, the main way to solve the conversion of high-concentration CO is: a high water-gas ratio to reduce the bed temperature, such as increasing the water-gas ratio to about 1.8 can reduce the temperature of the lower part of the bed to 460 ℃, but the problem with this method is that the steam consumption is too large; another method is to add a pre-reactor before the main shift reactor, introduce all the gasification process gas into the pre-reactor, and use it at a high space velocity The dry base composition of CO is reduced to about 40-50%, and then enters the main conversion reactor. The problem is that the pre-reactor is not easy to operate stably, and the conversion rate of the main rea

Method used

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  • Technology for transforming high Co raw gas obtained through pulverized coal pressure gasification

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Experimental program
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Effect test

Embodiment 1

[0031] like figure 1 As shown, the CO conversion process of this embodiment is as follows:

[0032] (1) The crude gas sent from aerospace pulverized coal gasification has a temperature of 213°C, a pressure of 3.72MPaG, and a CO dry basis molar content of about 68%. Due to heat loss during the process of transporting the crude gas from the gasification device to the conversion device through pipelines, There will be a small amount of water vapor condensed in the crude gas to form condensate, which will corrode pipes and equipment. Therefore, after the crude gas enters the conversion device, it first enters the gas-liquid separator (1) to separate the condensate from the bottom. The crude gas from the top of the gas-liquid separator ⑴ enters the feed heat exchanger ⑵ of the shift furnace, where the crude gas is heated to 260°C by the shift gas, reaching the activation temperature of the catalyst and at the same time higher than the saturation of water vapor in the crude gas tem...

Embodiment 2

[0038] like figure 1 As shown, the CO conversion process of this embodiment is as follows:

[0039] (1) The crude gas sent from aerospace pulverized coal gasification has a temperature of 201°C, a pressure of 3.72MPaG, and a CO dry basis molar content of about 61%. Due to heat loss during the process of transporting the crude gas from the gasification device to the conversion device through pipelines, There will be a small amount of water vapor condensed in the crude gas to form condensate, which will corrode pipes and equipment. Therefore, after the crude gas enters the conversion device, it first enters the gas-liquid separator (1) to separate the condensate from the bottom. The crude gas from the top of the gas-liquid separator ⑴ enters the feed heat exchanger ⑵ of the shift furnace, where the crude gas is heated to 260°C by the shift gas, reaching the activation temperature of the catalyst and at the same time higher than the saturation of water vapor in the crude gas tem...

Embodiment 3

[0045] like figure 1 As shown, the CO conversion process of this embodiment is as follows:

[0046] (1) The crude gas sent from aerospace pulverized coal gasification has a temperature of 210°C, a pressure of 3.72MPaG, and a CO dry basis molar content of about 71%. Due to heat loss during the process of transporting the crude gas from the gasification device to the conversion device through pipelines, There will be a small amount of water vapor condensed in the crude gas to form condensate, which will corrode pipes and equipment. Therefore, after the crude gas enters the conversion device, it first enters the gas-liquid separator (1) to separate the condensate from the bottom. The crude gas from the top of the gas-liquid separator ⑴ enters the feed heat exchanger ⑵ of the shift furnace, where the crude gas is heated to 260°C by the shift gas, reaching the activation temperature of the catalyst and at the same time higher than the saturation of water vapor in the crude gas tem...

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Abstract

A technology for transforming high Co raw gas obtained through pulverized coal pressure gasification is a technology for transforming raw gas with too high content of carbon monoxide, and can be used in an ammonia synthesis process or a hydrogen production process. The technology comprises the following steps: carrying out a four-stage transforming reaction on the raw gas, carrying out heat recovery, sending the obtained material to a downstream device, and further processing. The raw gas is transformed through a four-stage transforming furnace, heat generated in the reaction is used to heat water supplied to a middling pressure boiler, and a byproduct middle pressure saturated steam generated in the heating process is added to a position in front of the transformation furnace to adjust a water-steam ratio in order to reduce externally supplied steam and reduce energy consumption and systemic resistance drop.

Description

technical field [0001] The invention relates to a crude gas conversion process, in particular to a crude gas conversion process obtained by pressurized gasification of pulverized coal with high CO content. Background technique [0002] Affected by the increasing shortage of petroleum resources, my country's coal chemical industry has entered a stage of rapid development, and projects such as the production of synthetic ammonia and methanol using coal as raw materials have been launched one after another. This has also led to the introduction and application of various coal gasification processes, such as Shell pulverized coal gasification, Aerospace pulverized coal gasification, Lurgi coal gasification and Texaco coal water slurry gasification. Among them, my country's self-developed aerospace pulverized coal gasification process is widely favored by my country's chemical companies because of its wide application to coal types, high content of effective components in syngas,...

Claims

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Application Information

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IPC IPC(8): C01B3/16
CPCY02P20/10
Inventor 尹俊杰马如芬曹志斌汪旭红杜国强
Owner CHANGZHENG ENG
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