Multitubular fixed bed reactor and coal bed methane deoxidation method

Abstract

The invention provides a multitubular fixed bed reactor which is characterized in that the reactor comprises a first sealing head, a second sealing head, and a housing, wherein at least one partition plate is disposed in the housing to partition the reactor into at least two sections along an axial direction of the housing; a cooling medium inlet and a cooling medium outlet are disposed on the housing outside each section of the reactor; the tube number of each section of the reactor decreases orderly away from the second sealing head along the axial direction of the housing, and the tube diameters of the tubes increase orderly. The invention also provides a coal bed methane deoxidation method performed in the multitubular fixed bed reactor. Compared with various equipment improvement in the prior art, the multitubular fixed bed reactor of the invention is simple in structure, and low in preparation difficulty. In addition, the method of the invention not only ensures the coal bed methane deoxidation effect, eliminates hot spots in the reactor, but also ensures the processing capacity of the process.

Description

technical field [0001] The invention relates to a tube-and-tube fixed-bed reactor and a method for deoxidizing coal bed gas carried out in the reactor. Background technique [0002] Coalbed methane (commonly known as gas) is an available resource that exists in large quantities in coal seams, with methane as the main component. Usually in the mining process of coal mines, due to the explosive characteristics of coalbed methane, it is very easy to cause coal mine safety accidents, so the treatment method is generally to directly discharge the gas into the atmosphere. Since the main component methane is a greenhouse gas, its greenhouse effect is CO 2 More than 20 times of that, a large amount of coal-bed methane is discharged into the atmosphere, aggravating the global greenhouse effect. [0003] With the increasing scarcity of oil resources, the search for alternative energy has been the common focus of governments and business circles in recent decades. Among them, the ut...

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Problems solved by technology

[0011] As can be seen from the above-mentioned prior art, in order to control the temperature rise of the catalyst bed, or in order to control the heat released by the catalytic reaction, two methods are mainly used. One is to start from the reactor itself and increase the heat transfer rate. The idea is mainly aimed at the improvement of the reactor, including the different structural designs of the tube side and the shell side. The disadvantage is that the reactor structure is more complicated, which leads to an increase in investment costs; the second is to start from the process and control the heat released by the reaction. This idea can usually use ordinary fixed-bed reactors, but due to the control of the oxygen content of coalbed methane or its flow rate, the processing capacity of the process will decrease, resulting in an increase in operating costs

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