| As the fossil energy increasingly nervous, under the background of thesubject of energy for the big, the development of new energy has been theworld’s attention. As a new energy important members of the family, andconventional natural gas in our country on the distribution of inequality and thelack of gas supply capacity needs to be solved, and coalbed methane (CBM) is akind of new clean energy source, completely can make up for this problem.The mining of coal bed methane can effectively play a decisive role to thereduction of coal mine gas disasters.Through a large number of studies havefound that if the exploitation of coal-bed methane before coal mining, is about80%lower probability of coal mine gas explosion, function is enormous.At thesame time, the development and utilization of coalbed methane can effectivelypromote energy conservation and emissions reduction, and has a high economicvalue and environmental value.Coal seam gas direct emissions will cause21times in the same volume of carbon dioxide generated by the greenhouse effect,the harm to the environment is huge.Coalbed methane (CBM) is a kind of highcalorific value of clean energy, can generate huge economic benefits, the resultsshowed that the cost of the coal bed methane fuel cars for gasoline-fueledvehicle only37.3%, dual fuel automobile after modified for coalbed gas andgasoline fuel at the same time, we will not only greatly reduce costs, help toenergy conservation and emissions reduction is also huge.The development of coal-bed methane mining technology can reduce greenhouse gas emissions and to solve our dependence on foreign imports ofnatural gas, also in order to improve the safety of coal mining to makeconstructive help.The development of coal-bed methane mining technology, speed up thedevelopment of coalbed methane is very meaningful.Coal-bed methane due tothe pore structure of coal reservoir characteristics, permeability, reservoirpressure, buried depth, temperature, moisture, coal rank and coal rock maceraland other factors, so in principle analysis was studied for the coal desorption gasis very necessary, in this paper, the temperature, water, coal rank, etc, this paperanalyzes the factors affecting coal desorption gas.This article main researchcontent is:(1) The status of the experimental coal sample has two kinds: dry coalsamples (air dry coal samples) peace hengshui state coal sample (relativehumidity is96%potassium sulfate saturated solution to pore water of coalsample) in the environment.(2) There are four experimental coal sample adsorption equilibriumpressure, respectively is:0.25MPa,0.5MPa,0.7MPa and0.9MPa.The balanceof water adsorption equilibrium state coal sample do test pressure of0.25MPaand0.5MPa.Dry adsorption equilibrium state coal sample do test pressure is0.5MPa,0.7MPa and0.9MPa.Two dry state of coal sample were carried out a setof adsorption equilibrium test pressure is0.5MPa, the contrast of two groups oftest data can be concluded that two kinds of drying conditions of the differenceof coal samples under the same conditions, so as to draw some conclusions.(3) Test of water injection pressure in each group have five, respectively is:no water injection,1times,2.5times,2.5times and16times the adsorptionequilibrium of water injection pressure.Including balance condition of water willbe carried out in the ancient city of coal sample under normal temperature(temperature25℃) and high temperature, constant temperature90℃)experiment, so as to study the effect of temperature on coal desorption gas. (4) The result of the test for water injection ratio, temperature andadsorption equilibrium pressure Angle analysis research. |
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