CN1955268B - Method for preparing synthetic gas or safety fuel gas using gas of coal mine - Google Patents
Method for preparing synthetic gas or safety fuel gas using gas of coal mine Download PDFInfo
- Publication number
- CN1955268B CN1955268B CN2005101169145A CN200510116914A CN1955268B CN 1955268 B CN1955268 B CN 1955268B CN 2005101169145 A CN2005101169145 A CN 2005101169145A CN 200510116914 A CN200510116914 A CN 200510116914A CN 1955268 B CN1955268 B CN 1955268B
- Authority
- CN
- China
- Prior art keywords
- gas
- coal mine
- oxygen
- converter
- safety fuel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Industrial Gases (AREA)
- Hydrogen, Water And Hydrids (AREA)
Abstract
This invention relates to a syngas or safe fuel gas preparation with gas in coal mine. Gas in coal mine mixes with a certain amount of oxygen-containing gas and steam, and then the mixture is transported into gas in coal mine reformer. Part of oxidizing reaction and combustion reaction of methyl hydride and oxygen takes place at top combustion zone of the reformer, and then high temperature reaction gas continues to enter the accelerant bed layer of the middle and bottom of the reformer conducting transformation/ partial transformation reaction of methyl hydride and steam. The transformation gas obtaining after the reaction is syngas or safe fuel gas. This invention is used for treat the oxygen-containing gas in coal mine pumped from the pit to make it away from explosion range, and the product can be used as syngas for the production of synthetic ammonia and methanol or safe fuel gas for domestic or industrial use, which takes advantage of gas in coal mine sufficiently.
Description
Technical field
The present invention relates to a kind of method of utilizing coal mine mash gas to produce synthetic gas or safety fuel gas, can be used to the coal mine gas of blast easily is converted into the synthetic gas that can be used as industrial chemicals and maybe can grows fuel gas that distance is carried, safety.
Background technology
Coal mine mash gas is being commonly called as of coal-seam gas, is a kind of based on adsorbed state, is stored in the unconventional Sweet natural gas in the coal measure strata.Its composition and conventional gas are basic identical, major ingredient CH
4Content greater than 95%, thermal value is greater than 33890KJ/Nm
3(8100kcal/Nm
3), be the novel clean energy that emerges over nearly 20 years.
The reoovery method of coal mine mash gas is divided into ground extraction method and down-hole extraction method.From the ground drilling extraction, the mash gas concentration of extraction reaches more than 90% the ground extraction genealogy of law before coal mining, as Sweet natural gas, is convenient to carry and processing and utilization; The down-hole extraction genealogy of law is sealed extraction in coal mine, adopt coal mine gas sneaked into more air, concentration has only about 50%.
China buried depth 2000m is with shallow coal mine gas aboundresources, about 30～35,000,000,000,000 m of total reserves
3, with land conventional gas total resources (about 30,000,000,000,000 m
3) quite, be only second to Russia and Canada, occupy the third place in the world.But China's geologic condition complexity really can be also rare for the gas gas field of industrialization ground drilling extraction, and the coal mine gas of exploitation is not only measured and lacked at present, and mostly is the down-hole extraction greatly.
The coal mine gas of down-hole extraction generally contains CH
4～50%, O
2～10%, N
2～35%, CO～2%, CO
2～3%, if extraction process bad sealing or misoperation are sneaked into too much air, CH
4Content can reduce, O
2And N
2Content also can raise.The coal mine gas of down-hole extraction is because of O
2Content is higher, and blast easily is confined to use near the colliery at present both at home and abroad mostly in course of conveying, as domestic fuel or fuel used to generate electricity, causes the advantage of this clear energy sources of coal mine mash gas and value to fail to give full play to.
In China, most collieries still drain into atmosphere through exhausting system with coal mine gas, not only waste ample resources, and serious environment pollution (CH
4The greenhouse gases effect compare CO
2Big 21 times), also cause the outstanding accident of coal-mine gas to take place again and again.
Summary of the invention
The coal mine gas that the objective of the invention is to explode easily is converted into synthetic gas or the safe fuel gas that can be used for Chemical Manufacture, to make full use of the coal mine mash gas resource, promotes its use value.
For achieving the above object, the invention provides a kind of method of utilizing coal mine gas to produce synthetic gas or safety fuel gas, the technological process of this inventive method is: with coal mine gas and oxygen-containing gas, input coal mine gas converter after the vapor mixing, the partial oxidation reaction and the combustion reactions of methane and oxygen take place in combustion zone, described coal mine gas converter top, the high-temperature gas that reaction generates enter then described coal mine gas converter in, the lower catalyst bed layer, carry out the conversion/part conversion reaction of methane and water vapor, the reforming gas that obtains after the reaction is synthetic gas or safety fuel gas.
CH wherein
4With O
2Partial oxidation reaction and combustion reactions consume O
2And emit a large amount of heats, the main chemical reactions formula is as follows:
The high-temperature gas that reaction generates enter described coal mine gas converter in, bottom nickel-base catalyst bed, CH takes place
4With the conversion/part conversion reaction of water vapor, with CH
4Change into H
2, CO and CO
2, the main chemical reactions formula is as follows:
Be convenient and describe, remove and particularly point out, the accurate state lower volume of the equal index of the gas content content of mentioning below among the present invention, the gas usage of mentioning is than the accurate state lower volume ratio of equal index.
The synthetic gas that adopts the inventive method to produce with coal mine mash gas mainly contains H
2(50～60%), N
2Secondly (17～25%) gas be CO and CO
2, remaining CH
4≤ 0.5%, remaining O
2≤ 0.2%, can be used as the unstripped gas of Chemicals such as synthetic ammonia, methyl alcohol, soda ash etc.If near the hydrocarbon gas or the hydrogen-containing gas that remain to be utilized, as Sweet natural gas, petroleum refinery's gas, coke(oven)gas etc., also can with enter the coal mine gas converter after coal mine mash gas mixes and produce synthetic gas.
The safety fuel gas that adopts the inventive method to produce with coal mine mash gas mainly contains CH
4(30～36%), N
2Gas (40～50%) is CO, CO secondly
2And H
2Gas, remaining O
2≤ 0.5%, calorific value is 12000～15000KJ/Nm
3(2868～3585kcal/Nm
3), can be used as domestic fuel gas or industrial fuel gas.If near other fuel gas such as Sweet natural gas, town gas, liquefied gas etc. are arranged, also can be with after the fuel gas that makes with the inventive method mixes, by pipe network length apart from safe transport to the user.
The processing condition of the methane portion oxidation described in the aforesaid method, burning and conversion/part conversion reaction are: pressure 1.0～6.5MPa (G) when producing synthetic gas, 950～1350 ℃ of temperature; Pressure 0.2～4.0MPa (G) when producing safety fuel gas, 600～850 ℃ of temperature.The temperature of coal mine gas converter outlet reforming gas is: when producing synthetic gas 800～1050 ℃, and when producing safety fuel gas 550～800 ℃.
Oxygen-containing gas described in the aforesaid method is air, oxygen-rich air or oxygen.Adopt oxygen or oxygen-rich air when producing synthetic gas, it adds O
2Amount and water vapor consumption carry out thermal equilibrium and chemical reaction equilibrium by the composition for preparing required synthetic gas, determine through conventional process calculation, generally add O
2Amount is 0.1～0.15 times of gas tolerance, and the water vapor consumption is determined according to total carbon content ∑ C in the coal mine gas, is H
2O/ ∑ C=2.5～3.5 (molecular ratios), the interior temperature of coal mine gas converter this moment is generally 950～1350 ℃; When producing safety fuel gas, adopt air, its air consumption so that in the coal mine gas converter temperature reach 600～850 ℃ and guarantee O in the product gas
2Content≤0.5% is as the criterion, and generally adds air capacity and be 0.2～0.3 times of gas tolerance.The water vapor add-on is 0.5～1.2 times of total carbon content ∑ C in the coal mine gas.
Coal mine gas described in the aforesaid method needs through purifying treatment (dedusting, desulfurization) before entering the coal mine gas converter.Handle the total sulfur content in the after gas gas, when producing synthetic gas, should be removed to≤1mg/Nm
3When producing safety fuel gas, should be removed to≤20mg/Nm
3
Coal mine gas described in the aforesaid method, oxygen-containing gas and steam, before entering the coal mine gas converter, also need through pre-heating step, usually go into furnace gases with the pyrolytic conversion gas preheating of coal mine gas converter outlet, when producing synthetic gas, be preheated to 400～550 ℃, when producing safety fuel gas, be preheated to 300～400 ℃.
The heat of coal mine gas converter outlet pyrolytic conversion gas at first is used for the waste heat boiler byproduct steam in the aforesaid method, is used for the aforementioned gas of preheating then, and the steam of by-product can be imported the coal mine gas converter again.
Adopt method of the present invention, can make full use of the coal mine mash gas resource, promote its use value.
Describe the inventive method in detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the process flow diagram of the inventive method.
Embodiment
Embodiment 1:
With reference to figure 1, flow is 6000Nm
3/ h, pressure are that the purification coal mine gas of 2.5MPa (G) (contains CH
450%, N
235%, O
210%, CO
23%, CO2%, total sulfur≤1mg/Nm
3), through the coal mine gas preheater with from the thermal transition gas heat exchange of oxygen preheat device and coal mine gas/mixture of steam preheater, be that 6500kg/h, pressure are that 2.5MPa (G), temperature are 225 ℃ vapor mixing with flow after the preheating, enter the thermal transition gas heat exchange that coal mine gas/mixture of steam preheater and waste heat boiler come, enter coal mine gas converter burner gas mixer after being preheated to 480 ℃.
Flow is 650Nm
3/ h, pressure are that the oxygen of 2.5MPa (G) (contains O
2〉=99.6%) with a small amount of protection vapor mixing after, enter oxygen preheat device and thermal transition gas heat exchange from waste heat boiler, enter coal mine gas converter burner gas mixer after being preheated to 400 ℃.
CH behind the thorough mixing, through the ejection of mixing tank nozzle, takes place at coal mine gas converter headspace in coal mine gas/mixture of steam and oxygen in coal mine gas converter burner gas mixer
4Partial oxidation reaction and combustion reactions make combustion zone temperature reach 900～1350 ℃, and the heat following current of carrying under one's arms then enters in the coal mine gas converter, the lower catalyst bed layer carries out CH
4Conversion reaction with water vapor.Go out the reforming gas of coal mine gas converter, about 900 ℃ of the about 2.35MPa of pressure (G), temperature, reclaim the heat byproduct steam through waste heat boiler with de-salted water earlier, be divided into two strands of air-flows then, reclaim heat through oxygen preheat device and coal mine gas/mixture of steam preheater respectively, reclaim heat through the coal mine gas preheater again after two strands of air-flows converge.
The reforming gas that goes out the coal mine gas conversion system is synthetic gas, the about 12500Nm of its dry gas flow
3About 360 ℃ of/h, the about 2.2MPa of pressure (G), temperature, it consists of: H
256%, CO14%, CO
212%, N
217%, O
2≤ 0.2%, (CH
4+ Ar) 0.8%, send to Chemicals such as processing synthetic ammonia or methyl alcohol and (need a small amount of N of benefit during processing synthetic ammonia
2, need remove N during processing methyl alcohol
2The gas component), can process about synthetic ammonia or methyl alcohol 3500kg/h.
Embodiment 2:
With reference to figure 1, flow is 6000Nm
3/ h, pressure are that the purification coal mine gas of 0.6MPa (G) (contains CH
450%, N
235%, O
210%, CO
23%, CO2%, total sulfur≤20mg/Nm
3), through the coal mine gas preheater with from the thermal transition gas heat exchange of air preheater and coal mine gas/mixture of steam preheater, be that 1450kg/h, pressure are that 0.6MPa (G), temperature are 158 ℃ vapor mixing with flow after the preheating, enter the thermal transition gas heat exchange that coal mine gas/mixture of steam preheater and waste heat boiler come, enter coal mine gas converter burner gas mixer after being preheated to 400 ℃.
Flow is 1500Nm
3/ h, pressure are that the air of 0.6MPa (G) (contains O
221%, N
279%) with a small amount of protection vapor mixing after, enter air preheater and thermal transition gas heat exchange from waste heat boiler, enter coal mine gas converter burner gas mixer after being preheated to 400 ℃.
CH behind the thorough mixing, through the ejection of mixing tank nozzle, takes place at coal mine gas converter headspace in coal mine gas/mixture of steam and air in coal mine gas converter burner gas mixer
4Partial oxidation reaction and combustion reactions make combustion zone temperature reach 600～850 ℃, and the heat following current of carrying under one's arms then enters beds and carries out CH
4Part conversion reaction with water vapor.Go out about 600 ℃ of the about 0.5MPa of reforming gas pressure (G), the temperature of coal mine gas converter, reclaim the heat byproduct steam through waste heat boiler with de-salted water earlier, be divided into two strands of air-flows then, reclaim heat through air preheater and coal mine gas/mixture of steam preheater respectively, reclaim heat through a watt phase gas preheater again after two strands of air-flows converge, send system through de-salted water preheater, water cooler, air water separator (not marking in the accompanying drawing) after being cooled to normal temperature and separating and condensing liquid then.
The reforming gas that goes out the coal mine gas conversion system is safety fuel gas, the about 7200Nm of its dry gas flow
3/ h, the about 0.4MPa of pressure (G), temperature is normal temperature (≤40 ℃), it consists of: CH
435%, H
28%, CO4%, CO
27%, N
245.5%, O
2≤ 0.5%, its Lower heat value is 13900KJ/Nm
3(3300kcal/Nm
3) about, send the fuel gas gas holder or directly send the fuel gas pipe network.
It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that, still can make amendment and/or be equal to replacement, and not break away from the spirit and scope of the present invention the present invention.
Claims (6)
1. method of utilizing coal mine mash gas to produce synthetic gas or safety fuel gas, it is characterized in that input coal mine gas converter after coal mine gas and oxygen-containing gas and the vapor mixing, the partial oxidation reaction and the combustion reactions of methane and oxygen take place in combustion zone, described coal mine gas converter top, the high-temperature gas that reaction generates enter then described coal mine gas converter in, the lower catalyst bed layer, carry out the conversion/part conversion reaction of methane and water vapor, the reforming gas that obtains after the reaction is synthetic gas or safety fuel gas;
Described oxygen-containing gas adopts oxygen or oxygen-rich air when producing synthetic gas, according to volume ratio, add O
2Amount is 0.1～0.15 times of gas tolerance, and the water vapor consumption is 2.5～3.5 times of total carbon ∑ C molar weight in the coal mine gas; Adopt air when producing fuel gas, according to volume ratio, add air capacity and be 0.2～0.3 times of gas tolerance, the steam add-on is 0.5～1.2 times of total carbon molar weight in the coal mine gas.
2. the method for utilizing coal mine mash gas to produce synthetic gas or safety fuel gas according to claim 1, it is characterized in that described partial oxidation of methane, burning and conversion/part conversion reaction carries out under following processing condition: pressure 1.0～6.5MPa (G) when producing synthetic gas, 950～1350 ℃ of temperature; Pressure 0.2～4.0MPa (G) when producing safety fuel gas, 600～850 ℃ of temperature; The temperature of the reforming gas of described coal mine gas converter outlet is: when producing synthetic gas 800～1050 ℃, and when producing safety fuel gas 550～800 ℃.
3. the method for utilizing coal mine mash gas to produce synthetic gas or safety fuel gas according to claim 1, it is characterized in that described coal mine gas handles through dedusting, desulfurizing and purifying before entering described coal mine gas converter, handle the total sulfur content in the after gas gas, when producing synthetic gas, be removed to≤1mg/Nm
3When producing safety fuel gas, be removed to≤20mg/Nm
3
4. the method for utilizing coal mine mash gas to produce synthetic gas or safety fuel gas according to claim 1, it is characterized in that described coal mine gas, oxygen-containing gas and steam, the reforming gas preheating that before entering described coal mine gas converter, exports with described coal mine gas converter; When producing synthetic gas, be preheated to 400～550 ℃, when producing safety fuel gas, be preheated to 300～400 ℃.
5. the method for utilizing coal mine mash gas to produce synthetic gas or safety fuel gas according to claim 1, after it is characterized in that described coal mine gas and other hydrocarbon gas or hydrogen-containing gas mixing, enter described coal mine gas converter more together, be used to produce synthetic gas.
6. the method for utilizing coal mine mash gas to produce synthetic gas or safety fuel gas according to claim 5 is characterized in that described hydrocarbon gas is Sweet natural gas, petroleum refinery's gas or coke(oven)gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101169145A CN1955268B (en) | 2005-10-25 | 2005-10-25 | Method for preparing synthetic gas or safety fuel gas using gas of coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101169145A CN1955268B (en) | 2005-10-25 | 2005-10-25 | Method for preparing synthetic gas or safety fuel gas using gas of coal mine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1955268A CN1955268A (en) | 2007-05-02 |
| CN1955268B true CN1955268B (en) | 2011-05-18 |
Family
ID=38062823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005101169145A Active CN1955268B (en) | 2005-10-25 | 2005-10-25 | Method for preparing synthetic gas or safety fuel gas using gas of coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1955268B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101104825B (en) * | 2007-07-27 | 2011-05-04 | 无锡永大天然气集团有限公司 | Method for producing liquefied natural gas of mine gas |
| CN103834760B (en) * | 2014-02-25 | 2016-02-17 | 中国石油大学(北京) | A kind of method and device utilizing coal mine gas preparing synthetic gas production reduced iron |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85104091A (en) * | 1984-05-02 | 1986-11-26 | 英国石油公司P·L·C | Method for transformation |
| CN1031511A (en) * | 1987-08-14 | 1989-03-08 | 戴维麦基公司 | Produce synthetic gas from hydrocarbon-containing feedstock |
| CN1468800A (en) * | 2003-06-20 | 2004-01-21 | 中国科学院广州能源研究所 | Autothermal catalytic marsh gas reforming process of preparing synthetic gas |
-
2005
- 2005-10-25 CN CN2005101169145A patent/CN1955268B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85104091A (en) * | 1984-05-02 | 1986-11-26 | 英国石油公司P·L·C | Method for transformation |
| CN1031511A (en) * | 1987-08-14 | 1989-03-08 | 戴维麦基公司 | Produce synthetic gas from hydrocarbon-containing feedstock |
| CN1468800A (en) * | 2003-06-20 | 2004-01-21 | 中国科学院广州能源研究所 | Autothermal catalytic marsh gas reforming process of preparing synthetic gas |
Non-Patent Citations (2)
| Title |
|---|
| 李传统.甲烷制备高纯度氢气的实验研究.《南京师范大学学报》.2004,第4卷(第4期),28-31. * |
| 江魁.加压条件下甲烷、空气和水蒸汽转化制合成气的研究.《中国优秀硕士学位论文全文数据库》.2001, * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1955268A (en) | 2007-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107758617B (en) | Method for producing hydrogen by using biogas biomass | |
| CN101509368B (en) | Underground coal gasification multi-combining production system and method | |
| CN101245262B (en) | Gas-steam combined cycle system and technique based on coal gasification and methanation | |
| CN103242134A (en) | Pyrolysis gasification and purification method of household garbage | |
| CN102965131B (en) | Efficient and clean utilization technology for highly volatile young coal | |
| CN101973523B (en) | Method for preparing hydrogen gas by taking marsh gas as raw material | |
| CN102849680A (en) | Method for synthesis and purification of hydrogen from natural gas | |
| CN101717073A (en) | Method for preparing synthesis gas from coke oven gas | |
| CN101239702B (en) | High temperature coke oven crude gas hydrogen generating system device and technique | |
| CN102050699B (en) | Process for co-producing methanol and ammonia by utilizing calcium carbide tail gas | |
| CN102844408A (en) | Multi-purpose renewable fuel for isolating contaminants and storing energy | |
| CN107777663B (en) | A kind of coupling process of lighter hydrocarbons hydrogen manufacturing and hydrogen from methyl alcohol | |
| CN102531835B (en) | Method for synthesizing methanol through low-carbon technology | |
| CN204211707U (en) | Utilize the device of coke-oven gas and blast furnace gas combination producing Sweet natural gas and liquefied ammonia | |
| CN106554831A (en) | A kind of methane purification and the equipment and technique of carbon dioxide synchronization methanation conversion | |
| EP4330187A1 (en) | Process for producing hydrogen from a hydrocarbon feedstock | |
| CN107032954A (en) | The method that methanol and its derivative are produced using underground coal gasification(UCG) product gas | |
| CN107033961A (en) | The method that hydrogen is produced using underground coal gasification(UCG) product gas | |
| CN1955268B (en) | Method for preparing synthetic gas or safety fuel gas using gas of coal mine | |
| KR20110013999A (en) | Combined reformer of high pressure internal engine-plasma reactor and method for producting hydrogen or syngas using the same | |
| CN103204469B (en) | Full-low-transformation technique for tail gas of calcium carbide furnaces | |
| CN110562913B (en) | Method for producing hydrogen by using methane and water as raw materials | |
| CN104987891A (en) | Alternative fuel/chemical product production system based on gasification by steps of hydrocarbon components from coal | |
| CN218115020U (en) | Natural gas hydrogen production system | |
| CN216445007U (en) | High-temperature raw gas non-catalytic partial oxidation direct reforming system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Chengdu General Engineering Technology Co., Ltd. Assignor: Pang Yuxue Contract record no.: 2012510000035 Denomination of invention: Method for preparing synthetic gas or safety fuel gas using gas of coal mine Granted publication date: 20110518 License type: Exclusive License Open date: 20070502 Record date: 20120426 |