CN101649782A - Using method for combustion gas turbine of low-concentration gas - Google Patents
Using method for combustion gas turbine of low-concentration gas Download PDFInfo
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- CN101649782A CN101649782A CN200810118325A CN200810118325A CN101649782A CN 101649782 A CN101649782 A CN 101649782A CN 200810118325 A CN200810118325 A CN 200810118325A CN 200810118325 A CN200810118325 A CN 200810118325A CN 101649782 A CN101649782 A CN 101649782A
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Abstract
The invention discloses a using method for low-concentration gas. The low-concentration gas is directly introduced into or blended with air and then introduced into a compressor inlet of a combustiongas turbine to serve as the air of the combustion gas turbine, the air is compressed by the compressor and then introduced into a combustion chamber to be combusted with fuels, and the combusted smokeapplies work through turbine expansion and generates electricity. The low-concentration gas of which methane concentration is less than 1 percent is directly introduced into the compressor inlet, while the low-concentration gas of which methane concentration is more than 1 percent and less than 10 percent is firstly blended with the air to form the low-concentration gas of which methane concentration is less than 1 percent and then introduced into the compressor inlet. The using technology can reduce the fuel amount of the combustion gas turbine by about 30 percent, and reduce the greenhousegas effect by 21.5 times.
Description
Technical field
What the present invention relates to low concentration gas gas, coal mine to ventilate mash gas utilizes the method field, is a kind of technology of utilizing of low concentration gas gas, utilizes gas turbine that low concentration gas is converted into electric energy, reduces greenhouse gas emission simultaneously, increases safety of coal mines.
Background technique
Gas is meant a kind of unconventional rock gas (its Main Ingredients and Appearance is a methane) that preserves in the coal seam, is a kind of harmful gas that comes out automatically in the coal mining process, and is colourless, tasteless, inflammable, explosive.When the concentration of gas in the air reaches 5% between 16% the time, meet naked light and will blast.In the middle of the accident that China's coal-mine takes place, gas accident has accounted for more than 70% of all kinds of accidents.Gas is colliery " safe killer ", but gas also is a kind of energy of cleaning simultaneously, and higher value is arranged, and is called as " second coal resources ".
The development and use gas has protects the global environment, and improves multi-efficiencies such as safety of coal mines and increase new energy.Rationally utilize gas, become evil and be usefulness, both solved of the pollution of pump drainage gas, reclaimed this green energy resource of gas again atmosphere environment.Utilize gas to generate electricity, this is an economy that turns waste into wealth, useful approach.Moreover China has abundant coal bed gas resource, and about 35 tcms of gas stock number are suitable with natural gas resource amount (about 38 tcms), have very big market development prospect.
Weary wind is exactly that methane concentration is lower than 0.75% coal mine to ventilate mash gas.China is about the 100-150 billion cubic meter by the methane that weary wind enters atmosphere every year, is equivalent to ten thousand tons of standard coals of 1140-1700, and basic not utilization.Because methane has very strong greenhouse effect, be equivalent to 21.5 times of carbon dioxide greenhouse effect, to the damage capability of ozonosphere 7 times of carbon dioxide.According to statistics, in the methane of China's coal mines discharging, mine air-lack accounts for 91%, and the annual methane that enters atmosphere by weary wind is about the 100-150 billion cubic meter, and is suitable with 120 billion cubic meter amount of natural gas of transfering natural gas from the west to the east, is equivalent to ten thousand tons of standard coals of 1140-1700.According to expert estimation,, equal more than 1,000 ten thousand tons of crude oil or 2,000 ten thousand tons of coals are wasted according to the discharging equivalent of annual 10000000000 tons of pure methanes.Along with country is increasing to the demand of the energy, constantly developing distributed energy becomes energy saving, solves one of main path of current energy crisis, and abundant weary wind-resources cheap, exist actually obviously is that reliable source of the gas guarantees.Environmental benefit is also apparent.According to statistics, the emptying amount of the annual weary wind of China is equivalent to discharge about 200,000,000 tons carbon dioxide.If can all realize cleaning discharging, 1/5 the task that reduced discharging 1,000,000,000 tons of carbon dioxide by 2010 that will finish that China declares every year.And near 200,000,000 tons of emission amount of carbon dioxide; change into CDM (Clean Development Mechanism) income and also can reach 15,000,000,000 yuan along with country is increasing to the demand of the energy; constantly the development distributed energy becomes energy saving, solves one of main path of current energy crisis, and abundant weary wind-resources cheap, exist actually is exactly that reliable source of the gas guarantees.
Yet because coal mine ventilation air methane content is extremely low, if separate purification, power consumption will be considerably beyond the energy that obtains methane, and is very uneconomical.The methane of this concentration can not directly burn in addition, thus for a long time can only emptying, caused huge energy waste and environmental pollution.
Summary of the invention
The gas turbine that the purpose of this invention is to provide a kind of low concentration gas utilizes method, utilizes gas turbine will be difficult to purify and the low concentration gas of directly burning is converted into electric energy, becomes evil and be usefulness, reduces greenhouse gas emission, increase safety of coal mines.Described low concentration gas is meant that methane concentration is lower than 1% methane gas.
For achieving the above object, technical solution of the present invention is:
With low concentration gas directly or with the air blending after introduce the compressor inlet of gas turbine, air as gas turbine, feed the firing chamber through the compressor compresses of gas turbine behind 12-17 the barometric pressure and burn with fuel, gas fume after burning is through the turbine expansion acting and generate electricity.The concrete ratio of low concentration gas and air blending is for directly to introduce the suction port of compressor with the methane volume concentration less than 1% low concentration gas, and the methane volume concentration is then introduced the suction port of compressor with air blending formation methane volume concentration in mixing machine less than 1% low concentration gas earlier greater than 1% again less than 10% low concentration gas.The methane volume concentration can not directly be burnt less than 1% gas, so there is not safety issue in the compression of compressed machine.Methane concentration is compressed to less than the compressed machine of 1% low concentration gas and enters the firing chamber behind 12-17 the barometric pressure and fuel burns, fuel can be that gas turbines such as diesel oil, heavy oil, methyl alcohol can burn liquid fuel, also can be all gases fuel that gas turbines such as rock gas, coal-seam gas, synthetic gas, coke-stove gas, blast furnace gas can burn, owing to have fuel and low concentration gas in gas-turbine combustion chamber, to burn, therefore can be with the inflammable gas perfect combustion in the gas, the combustion gas after the burning enters the turbine acting and drives generator for electricity generation.
This utilize technology with methane concentration less than 1% and transform for high-grade electric energy through gas turbine less than the chemical energy in 10% the low concentration gas greater than 1%, if methane concentration is 1%, it is about 30% then can to reduce the fuel quantity of gas turbine, reduces by 21.5 times of greenhouse gases effects.
Effect of the present invention is that the gas turbine of realizing low concentration gas utilizes technology, will be difficult to purify and the low concentration gas of directly burning is converted into electric energy, reduces the greenhouse gases effect simultaneously, realizes efficient, the low investment of low concentration gas, the low-cost utilization.
Description of drawings
Fig. 1 utilizes techniqueflow chart for low concentration gas gas of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Referring to accompanying drawing 1, be general flow chart of the present invention, comprising mixing machine 1 and gas turbine (forming) by compressor 2, firing chamber 3 and turbine 4
Technological process of the present invention is described below:
As shown in Figure 1, if the volume concentration of methane is greater than 1% in the low concentration gas, the low concentration gas warp is being carried out blending with air in mixing machine 1, form methane concentration less than 1% low concentration gas, concentration by methane in automatic control and the on-line monitoring low concentration gas gas, according to the flow of the air mass flow of firing the machine needs at the low concentration gas of line computation and control and air blending, the low concentration gas and the air that enter mixing machine 1 all are normal temperature and pressure, by compressor 2 air-breathingly enter mixing machine 1 blending.Or directly methane concentration is introduced gas-turbine compressor 2 less than 1% low concentration gas, compressed machine 2 compressions, the low concentration gas air pressure of normal temperature and pressure is reduced to 12-17 barometric pressure, after temperature is about 300-400 ℃, enter firing chamber 3, low concentration gas and fuel burn in firing chamber 3, low concentration gas and fuel burn under 12-17 barometric pressure, it is 12-17 barometric pressure that the burning back forms pressure, temperature is 1000-1400 ℃ a high-temperature high-pressure fuel gas, combustion gas after the burning enters turbine 4, the high-temperature high-pressure fuel gas acting of in turbine, expanding, by 12-17 barometric pressure, temperature is that to be expanded to the normal pressure temperature be 400-600 ℃ flue gas to 1000-1400 ℃ high-temperature high-pressure fuel gas, turbine acting also drives generator for electricity generation, and the normal pressure temperature is that 400-600 ℃ flue gas enters exhaust heat boiler afterwards.
The above; it only is the preferred embodiment that proposes according to technical solution of the present invention; be not that the present invention is done any pro forma restriction; every technical solution of the present invention content that do not break away from;, all still belong in the claim protection domain of the present invention simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (4)
1, a kind of low concentration gas utilizes method, it is characterized in that, with low concentration gas directly or with the air blending after introduce the compressor inlet of gas turbine, air as gas turbine, compressed machine compression back feeds the firing chamber and fuel burns, and gas fume after burning is through turbine expansion acting and generating.
2, method according to claim 1 is characterized in that, if methane concentration is then directly introduced this low concentration gas the compressor inlet of gas turbine less than 1% in the gas; If methane concentration, then carries out this low concentration gas and air blending and makes methane concentration less than the compressor inlet of introducing gas turbine after 1% again less than 10% greater than 1% in the gas.
3, method according to claim 1 is characterized in that, described fuel is the liquid fuel that gas turbine can burn, and comprises diesel oil, heavy oil, methyl alcohol.
4, method according to claim 1 is characterized in that, described fuel is the gaseous fuel that gas turbine can burn, and comprises rock gas, coal-seam gas, synthetic gas, coke-stove gas, blast furnace gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810118325A CN101649782A (en) | 2008-08-13 | 2008-08-13 | Using method for combustion gas turbine of low-concentration gas |
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| CN200810118325A CN101649782A (en) | 2008-08-13 | 2008-08-13 | Using method for combustion gas turbine of low-concentration gas |
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| CN101649782A true CN101649782A (en) | 2010-02-17 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102424767A (en) * | 2011-09-09 | 2012-04-25 | 郑州瞳鸣环保有限公司 | Low-concentration gas power generation treatment method |
| CN102587991A (en) * | 2011-01-06 | 2012-07-18 | 胡达 | Coalbed methane heat energy conversion system |
| CN102767404A (en) * | 2011-05-06 | 2012-11-07 | 中国科学院工程热物理研究所 | System and method of gas turbine for utilizing low-concentration gas |
| CN103666610A (en) * | 2013-12-16 | 2014-03-26 | 北京扬德环境科技有限公司 | Low-concentration gas treatment device and method |
| CN103857890A (en) * | 2011-10-17 | 2014-06-11 | 川崎重工业株式会社 | Low-concentration methane gas oxidation system using gas turbine engine waste heat |
| CN105649771A (en) * | 2016-01-13 | 2016-06-08 | 中国矿业大学(北京) | Technique and method for achieving power generation by means of explosion of extremely-low-concentration gas |
| CN108363422A (en) * | 2018-03-07 | 2018-08-03 | 河北工程大学 | A kind of mixed air-conditioning control system and method for methane |
-
2008
- 2008-08-13 CN CN200810118325A patent/CN101649782A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587991A (en) * | 2011-01-06 | 2012-07-18 | 胡达 | Coalbed methane heat energy conversion system |
| CN102767404A (en) * | 2011-05-06 | 2012-11-07 | 中国科学院工程热物理研究所 | System and method of gas turbine for utilizing low-concentration gas |
| CN102424767A (en) * | 2011-09-09 | 2012-04-25 | 郑州瞳鸣环保有限公司 | Low-concentration gas power generation treatment method |
| CN102424767B (en) * | 2011-09-09 | 2013-06-19 | 郑州瞳鸣环保有限公司 | Low-concentration gas power generation treatment method |
| CN103857890A (en) * | 2011-10-17 | 2014-06-11 | 川崎重工业株式会社 | Low-concentration methane gas oxidation system using gas turbine engine waste heat |
| CN103666610A (en) * | 2013-12-16 | 2014-03-26 | 北京扬德环境科技有限公司 | Low-concentration gas treatment device and method |
| CN103666610B (en) * | 2013-12-16 | 2015-10-28 | 北京扬德环境科技股份有限公司 | A kind of low concentration gas treatment unit and treatment process thereof |
| CN105649771A (en) * | 2016-01-13 | 2016-06-08 | 中国矿业大学(北京) | Technique and method for achieving power generation by means of explosion of extremely-low-concentration gas |
| CN108363422A (en) * | 2018-03-07 | 2018-08-03 | 河北工程大学 | A kind of mixed air-conditioning control system and method for methane |
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Application publication date: 20100217 |