Process for producing hydrogen from natural gas by using calcium carbide tail gas

A natural gas and process technology, applied in the field of natural gas hydrogen production process, can solve the problems of increasing pollutant discharge, environmental pollution, unfavorable harmonious society, etc., and achieve the effect of improving reliability and flexible process operation

Inactive Publication Date: 2012-10-24
QINGHAI YIHUA CHEM
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  • Abstract
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  • Application Information

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Problems solved by technology

[0002] Calcium carbide tail gas contains a large amount of carbon monoxide, which seriously pollutes the environment. Carbon monoxide is one of the main raw materials for various carbon chemicals. At present, the use of calcium carbide tail gas is mostly concentrated in burning boilers or lime. Although it has increased benefits, it has also increased The discharge of pollutants is not conducive to the purpose of a harmonious society

Method used

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the examples.

[0018] A process for producing hydrogen from natural gas utilizing calcium carbide tail gas, comprising the steps of:

[0019] Step 1, natural gas steam reforming

[0020] After the raw natural gas is stabilized to 1.8MP(G), it enters the raw gas preheating coil in the convection section of the steam reformer, preheats to 360°C, and enters the zinc oxide desulfurization tank to desulfurize the raw natural gas to 0.2ppm Below, raw natural gas and process steam after desulphurization according to H 2 O / C ratio 3.0~3.2 mixed into the preheating coil of the mixed gas, further preheated to 580 ℃, enters the radiant section of the reformer, methane reacts with water vapor in the catalyst layer to generate H 2 And CO, the heat required for the conversion of methane is provided by the burner burning fuel mixture. The temperature of the reformed gas exiting the reformer is 820°C...

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Abstract

A process for producing hydrogen from natural gas by using calcium carbide tail gas comprises the following steps: firstly performing pressure stabilization and desulphurization of natural gas, converting the natural gas together with the calcium carbide tail gas, allowing the raw material of calcium carbide tail gas to enter from an inlet of an adsorption tower, performing neutralization and PSA for hydrogen extraction so as to obtain hydrogen with a desired purity at an outlet end; the basic working steps of the pressure swing adsorption comprise adsorption and regeneration; when compared with the prior art, the process of the invention is flexible in operation, can effectively treat calcium carbide tail gas, not only realizes reasonable utilization of the calcium carbide tail gas, but also cause no great environment pollution; meanwhile the invention can combine multiple operation modes; with program control by a computer control system, 6 adsorption towers can operate simultaneously; if needed (for example, if a valve fault or a control device fault occurs), 5 towers can be switched to operate simultaneously, and thus an on-line service function of the device is realized, which greatly improves the device operation reliability.

Description

technical field [0001] The invention belongs to the field of calcium carbide tail gas treatment, and more specifically provides a natural gas hydrogen production process using calcium carbide tail gas. Background technique [0002] Calcium carbide tail gas contains a large amount of carbon monoxide, which seriously pollutes the environment. Carbon monoxide is one of the main raw materials for various carbon chemicals. At present, the use of calcium carbide tail gas is mostly concentrated in burning boilers or lime. Although it has increased benefits, it has also increased The discharge of pollutants is not conducive to the purpose of a harmonious society. Contents of the invention [0003] In order to overcome the disadvantages of the above-mentioned prior art, the object of the present invention is to provide a natural gas hydrogen production process using calcium carbide tail gas, which has the characteristics of waste utilization and environmental pollution reduction. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/16C01B3/50
CPCY02P20/129
Inventor 蒋远华李先军谭培义李俊姜传福易春雨周灿丁勇钟鹤岩程勇张天虎钟雪飞
Owner QINGHAI YIHUA CHEM
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