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Process of catalytic deoxidation of oxygen-containing coal bed methane and comprehensive utilization of reaction heat

A technology for catalytic deoxidation and coalbed methane, which is applied in the field of gas deoxidation technology and heat utilization, and can solve the problems of less than 10% utilization rate, waste of resources, waste of heat energy, etc.

Active Publication Date: 2014-12-03
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In my country, coalbed methane equivalent to pure methane discharged into the atmosphere due to coal mining reaches more than 20 billion cubic meters each year, while the utilization rate is less than 10%, resulting in a huge waste of resources
In the deoxygenation process of oxygen-containing coalbed methane, methane and oxygen undergo a catalytic combustion reaction, which releases a large amount of heat and causes the temperature of the deoxidized gas to rise. If the heat is not properly utilized, a large amount of heat energy will be wasted.

Method used

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  • Process of catalytic deoxidation of oxygen-containing coal bed methane and comprehensive utilization of reaction heat
  • Process of catalytic deoxidation of oxygen-containing coal bed methane and comprehensive utilization of reaction heat
  • Process of catalytic deoxidation of oxygen-containing coal bed methane and comprehensive utilization of reaction heat

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Embodiment 1

[0055] The invention relates to an oxygen-containing coal bed gas catalytic deoxidation process and comprehensive utilization of reaction heat. In a deoxygenation reactor, methane and oxygen in a raw material mixed gas are reacted in a catalytic reactor containing a catalyst to achieve the purpose of deoxidation. The reactor is a single adiabatic reactor, and the mixed gas enters from the top of the reactor. The temperature, flow rate and oxygen content of the gas during operation are shown in Table 1 below. System pressure 1.1MPa (absolute pressure). The circulation ratio is 0, and the catalyst dosage is 2.5m 3 . The catalyst is a palladium catalyst (CAN-561 produced by Southwest Chemical Research and Design Institute). see process figure 1 .

[0056] The deoxygenated gas exiting the reactor enters the feed gas preheater (E2) to preheat the mixed gas entering the reactor. After the deoxygenation passes through the raw material gas preheater (E2), it enters the deoxygena...

Embodiment 2

[0062] The invention relates to an oxygen-containing coal bed gas catalytic deoxidation process and comprehensive utilization of reaction heat. In a deoxygenation reactor, methane and oxygen in a raw material mixed gas are reacted in a catalytic reactor containing a catalyst to achieve the purpose of deoxidation. The reactor is a single adiabatic reactor, and the mixed gas enters from the top of the reactor. The temperature, flow rate and oxygen content of the gas during the operation are shown in Table 3 below. System pressure 0.8MPa (absolute pressure). Circulation ratio is 0, catalyst dosage is 2m 3 . The catalyst is the sulfur-resistant deoxidation catalyst disclosed in the Chinese invention patent (ZL200810045665.9), which consists of 30% active components, 30% active auxiliary agents and 40% carriers, that is, the active components are composed of 30% cobalt chloride, The active auxiliary agent is composed of 5% manganese chloride equivalent to manganese dioxide and 2...

Embodiment 3

[0069] The invention relates to an oxygen-containing coal bed gas catalytic deoxidation process and comprehensive utilization of reaction heat. In a deoxygenation reactor, methane and oxygen in a raw material mixed gas are reacted in a catalytic reactor containing a catalyst to achieve the purpose of deoxidation. The reactor is a single adiabatic reactor, and the mixed gas enters from the top of the reactor. The temperature, flow rate and oxygen content of the gas during operation are shown in Table 5 below. System pressure 0.4MPa (absolute pressure). Circulation ratio is 0, catalyst dosage is 4m 3 . The catalyst is the ring-shaped manganese-based sulfur-resistant deoxidation catalyst disclosed in the Chinese invention patent (ZL200710049962.6), which is composed of 20% active components, 50% support carriers and 30% binders; the active component is manganese oxalate, the support carrier It is an X-type molecular sieve, the binder is attapulgite, and 10% carboxymethyl cellu...

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Abstract

The invention discloses a process of catalytic deoxidation of oxygen-containing coal bed methane and comprehensive utilization of reaction heat; in the presence of a catalyst, methane and oxygen in the raw material of coal bed methane are subject to a catalytic combustion reaction for deoxidation; a lot of reaction heat is released during the reaction process; according to the volume flow rate of the raw material coal bed methane to be processed and the oxygen content of the raw material coal bed methane, a single or a plurality of serially-connected adiabatic reactors are selected as the catalytic reactor; after the reaction, the high-temperature deoxidized gas is subject to four-stage heat recovery; after the four-stage heat utilization, a part of the deoxidized gas enters a next processing section, and a part of the deoxidized gas returns to the deoxidation reaction system; the generated steam is used for pushing the raw material gas and the circulation gas in the deoxidation process to a turbocompressor, or is used for power generation. The process of the invention realizes full and reasonable utilization of heat by reaction heat multistage recovery, effectively reduces process energy consumption, is wide in application scope, and is a clean, low-consumption catalytic deoxidation process for gas rich in combustible gas.

Description

technical field [0001] The invention belongs to the field of gas deoxygenation technology and heat utilization, in particular to a catalytic deoxidation process of oxygen-containing coal bed gas and comprehensive utilization of reaction heat. Background technique [0002] Coalbed methane exists in large quantities in coal seams, and is an unconventional natural gas, which is one of the main causes of underground accidents in coal mines. In fact, coalbed methane is a new energy with high calorific value and no pollution. It can be used as fuel for power generation, process fuel, chemical raw material and residential fuel. The total amount of coalbed methane resources buried within 2,000 meters in my country is 36.81 trillion cubic meters, which is equivalent to conventional natural gas and is currently the most realistic natural gas supplementary resource. [0003] The coalbed methane extracted in my country mainly comes from the mixed coalbed methane produced by the active ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/10F22B1/18
Inventor 陈耀壮廖炯郑珩马磊毛震波温少桦
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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