Gas-liquid separation device for oxygenous coal bed

Abstract

The invention discloses a gas-liquid separation device for an oxygenous coal bed, comprising a main process system and a refrigeration system, wherein the main process system comprises a first-stage heat exchanger, a second-stage heat exchanger, a third-stage heat exchanger and a rectification column which are orderly connected in series; and the refrigeration system comprises a mixed refrigerantbalance pot, a refrigerant compressor, a refrigerant cooler, a refrigerant primary gas-liquid separator and a refrigerant secondary gas-liquid separator. The refrigeration device of the invention adopts mixed refrigeration and combines throttling refrigeration, changes the traditional refrigeration process, sufficiently and rationally utilizes the refrigeration capacity reclaiming process in the technological process, and improves the refrigeration efficiency, thereby relatively improving the processing capability of the device; for the coal bed gas with low single well output, the productioncost can be saved; and only one set of compression equipment is utilized, so that the power energy is saved.

Description

technical field [0001] The invention relates to a separation device using the principle of liquefaction, in particular to a liquefaction separation device for oxygen-containing coal bed gas. Background technique [0002] Oxygen-containing coalbed methane is the primary by-product pumped out during coal mining to prevent gas explosions and outbursts and ensure safe production in coal mines; its main component is methane, and it can be seen from its composition content that coalbed methane is a relatively important energy source and chemical raw materials. However, due to its complex composition, especially the oxygen contained in coalbed methane, it is a very dangerous combustion and explosion-supporting agent, which restricts the comprehensive utilization of oxygen-containing coalbed methane; in practice, in order to save costs, coalbed methane is generally used in the coal mining process Exhausted into the atmosphere, causing extreme waste of resources and pollution to the...

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Problems solved by technology

[0004] However, this refrigeration process adopts conventional refrigeration methods such as mixed refrigeration or expansion refrigeration, which has a complex structure, and auxiliary machinery such as a turbine expansion set, the refrigeration efficiency is low, and the processing capacity of the separation and liquefaction device is reduced.

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