Clean energy taking system and method for coal-bed gas field

A technology for coalbed methane wells and coalbeds, which is applied in the field of comprehensive development and utilization of coalbed methane and underground coal gasification, can solve the problems of high cost of new drilling and underground gasifier construction, insufficient deep processing and utilization of crude gas, and low comprehensive thermal efficiency. To solve the problem of environmental protection treatment costs, achieve effective recycling, and reduce the energy consumption of refrigeration operations

CN111396010APending Publication Date: 2020-07-10新疆维吾尔自治区煤田地质局煤层气研究开发中心
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2020-07-10

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Abstract

The invention discloses a clean energy taking system and method for a coal-bed gas field. Two coal-bed gas wells entering a recession period and one coal-bed gas well still in a production stage are selected in the coal-bed gas field, the two coal-bed gas wells entering the recession period are the first coal-bed gas well and the second coal-bed gas well correspondingly, the coal-bed gas well still in the production stage is a third coal-bed gas well, wherein the depths of the first coal-bed gas well, the second coal-bed gas well and the third coal-bed gas well are sequentially increased, anda first pressure swing adsorption separation device, a gas injection pump, a supercritical water gasification hydrogen production device, a gas-solid-liquid separation device, a heat exchange device and a gas separation and purification liquefaction device are involved. According to the clean energy taking system and method, secondary development and utilization of the coal-bed gas field in the recession period are effectively implemented, various devices such as gasifier building, combustion control and monitoring are omitted, the underground coal gasification cost is greatly reduced, low-carbon emission is achieved, and a new high-added-value product is obtained.
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Description

technical field

[0001] The invention belongs to the technical field of comprehensive development and utilization of coalbed methane and underground coal gasification, and in particular relates to a clean energy harvesting system and method for a coalbed methane field. Background technique

[0002] Coal is the fossil energy with the largest amount of reserves and the largest amount of mining in my country. The mining history has reached hundreds of years. Especially since the reform and opening up, the high-intensity mining has basically completed the mining of shallow coal seams, while the mining of middle and deep coal seams is difficult and costly. High-efficiency and low-cost development of rich mid-to-deep coal resources has become a research direction. After decades of exploration and practice, underground coal gasification has become the most important means of in-situ mining. Underground coal gasification involves drilling vertical / horizontal wells, constructing under...

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] Such as figure 1As shown, in the coalbed methane field clean energy harvesting system of the present invention, two coalbed methane wells entering the recession period and one coalbed methane well still in the production stage are selected in the coalbed methane field, and the two coalbed methane wells entering the recession period are respectively the first coalbed methane well 1 and the second CBM well 2, the CBM well still in production is the third ...