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Recycling system for condensate after reforming of methane steam in coke oven gas

A coke oven gas and condensate technology, which is applied in the field of coal chemical waste liquid utilization, can solve the problems of waste of high-quality water resources and achieve the effect of saving water resources

Pending Publication Date: 2018-11-23
SHANXI HEIMAO JIAOHUA CO LTD
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  • Application Information

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Problems solved by technology

However, due to the excellent water quality of the process condensate produced in this process, which is close to the water quality of desalinated water, it causes waste of high-quality water resources to a large extent.

Method used

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  • Recycling system for condensate after reforming of methane steam in coke oven gas

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] The invention discloses a recycling system for condensate after methane steam reforming in coke oven gas, such as figure 1 As shown, including the reformer 4, the reformer 4 is used to greatly reduce the content of methane in the coke oven gas, and reduce the content of methane in the coke oven gas from 19-21% (volume fraction) to below 1%.

[0017] The temperature of the gas discharged from the gas outlet of the reformer 4 is generally around 980°C. It needs to be cooled and preheated for recycling. Therefore, a heat exchange unit 10 is installed on the pipeline between the reformer 4 and the gas-liquid separator 9 , the heat exchange unit 10 includes one or more of a waste heat boiler, a coke oven preheater, a boiler feed water preheater, a desalted water preheater and a water cooler, which can be specifically configured according to...

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Abstract

The invention discloses a recycling system for condensate after reforming of methane steam in coke oven gas. The recycling system comprises a reforming furnace, wherein a gas outlet of the reforming furnace is connected to a gas inlet of a gas-liquid separator through a heat exchange unit; a gaseous phase outlet of the gas-liquid separator is used for delivering the coke oven gas to a methanol synthesis workshop through a pipeline; a liquid phase outlet of the gas-liquid separator is connected to a raw material inlet of a stripping tower through a pipeline; a stripping agent inlet of the stripping tower is connected with an air blower through a pipeline; a liquid outlet of the stripping tower is connected to a circulating water system of the reforming furnace so as to provide desalted water for the circulating water system. By combining the stripping tower with the circulating water system, the condensate drained from the gas-liquid separator can be effectively utilized, CO and CO2 inthe condensate are removed, and the condensate is reformed into up-to-standard reforming furnace jacket water; the up-to-standard reforming furnace jacket water enters the circulating water system forrecycling.

Description

【Technical field】 [0001] The invention belongs to the technical field of waste liquid utilization in coal chemical industry, and in particular relates to a recycling system for condensate after steam reforming of methane in coke oven gas. 【Background technique】 [0002] In the coke oven gas to methanol process, since the methane in the coke oven gas does not participate in the methanol synthesis reaction, a conversion process is set up before the methanol synthesis process to convert the methane in the coke oven gas. The main equipment of the conversion process is methane Steam reformer, its main function is to complete the partial non-catalytic oxidation of coke oven gas after fine desulfurization and methane steam reforming so that the methane content in the process gas in the outgoing process is ≤1.0% (volume fraction), and then meets the needs of methanol synthesis in the subsequent process . In the prior art, the process gas output from the reformer is condensed and pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/00C07C29/152C07C31/04
CPCB01D19/001C07C29/152C07C31/04Y02P20/129
Inventor 孙铁刚师勇惠国强田宝锋
Owner SHANXI HEIMAO JIAOHUA CO LTD
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