CN106958495B - The method to be generated electricity using coal mine light concentration mash gas - Google Patents
The method to be generated electricity using coal mine light concentration mash gas Download PDFInfo
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- CN106958495B CN106958495B CN201710239163.9A CN201710239163A CN106958495B CN 106958495 B CN106958495 B CN 106958495B CN 201710239163 A CN201710239163 A CN 201710239163A CN 106958495 B CN106958495 B CN 106958495B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/106—Removal of contaminants of water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0227—Means to treat or clean gaseous fuels or fuel systems, e.g. removal of tar, cracking, reforming or enriching
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention discloses a kind of methods to be generated electricity using coal mine light concentration mash gas, comprising the following steps: a. condenses device in Gas using cold water made from absorption refrigeration unit；B. the condensed device in Gas is dehydrated；C. the dewatered device in Gas input gas electricity unit is generated electricity；D. the high-temperature flue gas that the gas electricity unit is discharged is delivered to the absorption refrigeration unit, and heating concentration is carried out to the aqueous solutions of absorbent of absorption refrigeration unit, this method enters refrigeration unit obtained cold water using the flue gas that gas electricity unit generates and gas is condensed and is dehydrated, residual heat resources can be efficiently used, power load is reduced, comprehensive energy consumption is reduced.
Description
Technical field
The present invention relates to low concentration coal-bed gas power field, specifically a kind of side to be generated electricity using coal mine light concentration mash gas
Method.
Background technique
Currently, China's coal bed gas power generation project has that Homes Using TV is low, generating efficiency is low.And it influences generating set and opens
One main cause of probability and generating efficiency is exactly the presence (the especially water of free state) of moisture content in coal bed gas gas source, domestic
The dehydration device overwhelming majority installed in gas electricity station air delivering pipeline is all single mechanical dehydration, such as whirlwind dehydration and gravity
Formula dehydration；Also have using electricity refrigeration to gas cooling and dewatering mode；Gas electricity unit tail gas major part direct emission.It is existing
Single mechanical gas dehydrating effect is poor, and upgrading effect is undesirable；It is larger using electric refrigeration cool-down dehydration power load, it is comprehensive
Energy consumption is higher；Between 450 DEG C to 550 DEG C, direct emission pollutes environment and causes the energy unrestrained gas electricity unit exhaust temperature
Take.
Therefore, it is necessary to a kind of method to be generated electricity using coal mine light concentration mash gas, this method utilizes generating set waste heat from tail gas
Deep dehydration is carried out to low concentration coal-bed gas, improves generating set Homes Using TV and generating efficiency.
Summary of the invention
In view of this, providing a kind of utilization coal mine light concentration watt the purpose of the present invention is overcoming defect in the prior art
The method of this power generation, this method carry out deep dehydration to low concentration coal-bed gas using generating set waste heat from tail gas, improve generator
Group Homes Using TV and generating efficiency.
The method to be generated electricity using coal mine light concentration mash gas of the invention, comprising the following steps: a. utilizes Absorption Refrigerator
Cold water obtained condenses device in Gas；B. the condensed device in Gas is dehydrated；C. by dewatered described watt
This gas input gas electricity unit generates electricity；D. the high-temperature flue gas that the gas electricity unit is discharged is delivered to the absorption
Formula refrigeration unit, and heating concentration is carried out to the aqueous solutions of absorbent of absorption refrigeration unit；
Further, in the step a, before device in Gas is condensed, preliminary hydro-extraction should be carried out；
Further, the absorption refrigeration unit is BrLi chiller；
Method using coal mine light concentration mash gas power generation of the invention further includes step e. real-time monitoring input gas electricity
The device in Gas water content of machine, and the water content real-time control by measuring inputs the high temperature cigarette of the absorption refrigeration unit
Throughput；
Further, the step e includes: the device in Gas water content of e1. real-time monitoring input gas generator；
E2. when the water content is more than preset threshold, the high temperature cigarette for inputting the absorption refrigeration unit is gradually increased
Throughput；E3. when the water content is less than or equal to given threshold, the height for currently inputting the absorption refrigeration unit is kept
Warm flue gas flow；
Method using coal mine light concentration mash gas power generation of the invention further includes step f. according to the water content measured
The refrigerating capacity of absorption refrigeration unit described in real-time control；
Further, the step f includes: f1. when the water content is more than preset threshold, is gradually increased described absorption
The circular flow of cold water made from refrigeration unit；F2. it when the water content is less than or equal to given threshold, keeps presently described
The circular flow of cold water made from absorption refrigeration unit.
Further, in the step a, the device in Gas is condensed using shell-and-tube methane gas heat exchanger.
The beneficial effects of the present invention are: the method for the invention to be generated electricity using coal mine light concentration mash gas, device in Gas are being entered
Before gas electricity unit is generated electricity, first passes through cold water made from absorption refrigeration unit and cooling condensation is carried out to device in Gas, then
Condensed device in Gas is dehydrated, to remove condensed water, then device in Gas is passed through gas electricity unit and is generated electricity, finally
By moisture content (the especially water of the free state) removal in gas gas source, to improve the Homes Using TV and power generation effect of gas generator
Rate, the high-temperature flue gas of gas electricity unit discharge is as heat source to the absorbent solution (lithium-bromide solution) of absorption refrigeration unit
Heating concentration is carried out, enters the obtained hot water of waste heat boiler compared to flue gas or saturated vapor enters back into refrigeration unit, using this hair
Bright method, which is invested, to be reduced, and refrigeration unit efficiency improves；Refrigeration unit is entered using flue gas, cold water is made, compared to electric refrigerated medium
Cold water is taken, residual heat resources are efficiently used, reduces power load, reduces comprehensive energy consumption.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and examples:
Fig. 1 is flow chart of the invention.
Specific embodiment
Fig. 1 is flow chart of the invention；As shown, the present embodiment includes using the method for coal mine light concentration mash gas power generation
Following steps: a. condenses device in Gas using cold water made from absorption refrigeration unit 2；B. by the condensed gas
Gas is dehydrated；C. the dewatered device in Gas input gas electricity unit 4 is generated electricity；D. by the gas generator
The high-temperature flue gas of 4 discharge of group is delivered to the absorption refrigeration unit 2, and to the aqueous solutions of absorbent of absorption refrigeration unit 2
Carry out heating concentration, in the present embodiment, device in Gas first passes through absorption refrigeration before being generated electricity into gas electricity unit 4
Cold water made from unit 2 carries out cooling condensation to device in Gas, then condensed device in Gas is taken off by postposition dehydration device 5
Device in Gas to remove condensed water, then is passed through gas electricity unit 4 and generated electricity by water, finally that the moisture content in device in Gas source is (special
It is not the water of free state) removal, so that the Homes Using TV and generating efficiency of gas generator are improved, what gas electricity unit 4 was discharged
High-temperature flue gas carries out heating concentration as absorbent solution (lithium-bromide solution) of the heat source to absorption refrigeration unit 2, compared to
Flue gas enters the obtained hot water of waste heat boiler or saturated vapor enters back into refrigeration unit 2, is invested and is reduced using desorption method of the invention,
2 efficiency of refrigeration unit improves；Refrigeration unit 2 is entered using flue gas, cold water is made, produced cold water compared to electricity, efficiently use
Residual heat resources reduce power load, reduce comprehensive energy consumption.
In the present embodiment, in the step a, before device in Gas is condensed, preliminary hydro-extraction, the present embodiment should be carried out
In, using existing mechanical dehydration device as preposition dehydration device 1 (such as whirlwind dehydration device and gravity type dehydration device)
Preliminary hydro-extraction is carried out to the device in Gas before condensation, the preliminary hydro-extraction of device in Gas elder generation removes liquid water, then carries out cooling condensation, compared to
Device in Gas directly condenses, needed for cooling capacity substantially reduce.
In the present embodiment, the absorption refrigeration unit 2 is BrLi chiller 2；Lithium bromide refrigerator lithium bromide
Aqueous solution is absorbent, and wherein water is refrigerant, and lithium bromide is absorbent.Lithium-bromide absorption-type refrigerating machine is because being refrigeration with water
Agent, evaporating temperature can only be used to the cold water of the apparatus of air conditioning and preparation of the production process, this refrigeration machine can at 0 DEG C or more
Use the hot water of low pressure water vapor or 75 DEG C or more as heat source, the flue gas being discharged in the present embodiment using generating set 4 is as warm
Source carries out heating concentration to the lithium bromide weak solution in generator.
Method using coal mine light concentration mash gas power generation of the invention further includes step e. real-time monitoring input gas electricity
The device in Gas water content of machine, and the water content real-time control by measuring inputs the high temperature of the absorption refrigeration unit 2
Flue gas flow；By measuring dewatered device in Gas water content in the present embodiment, flue gas air inflow is adjusted, refrigeration machine is made
Group 2 operates in optimum condition.
In the present embodiment, the step e includes: the device in Gas water content of e1. real-time monitoring input gas generator；e2.
When the water content is more than preset threshold, the high-temperature flue gas flow for inputting the absorption refrigeration unit 2 is gradually increased；e3.
When the water content is less than or equal to given threshold, the high-temperature flue gas stream for currently inputting the absorption refrigeration unit 2 is kept
Amount；It, can be in the flue between 2 air inlet of exhanst gas outlet and absorption refrigeration unit of generating set 4 in the present embodiment
Electric gas check is set, by adjusting flue gas valve opening, adjusts flue gas flow.
The method using coal mine light concentration mash gas power generation of the present embodiment further includes step f. described aqueous according to what is measured
The refrigerating capacity of absorption refrigeration unit 2 described in real-time control is measured, on the one hand this mode can guarantee that the condensation satisfaction of gas is wanted
It asks, the energy consumption of the reduction refrigeration unit 2 of another aspect amplitude peak.
In the present embodiment, the step f includes: f1. when the water content is more than preset threshold, gradually increases the suction
The circular flow of cold water made from receipts formula refrigeration unit 2；F2. it when the water content is less than or equal to given threshold, keeps working as
The circular flow of cold water made from the preceding absorption refrigeration unit 2 thoroughly does away with gas tolerance and water content, adjusts refrigeration unit 2
The revolving speed of water supply pump meets 3 refrigeration capacity requirement of heat exchanger to change the circular flow of cold water.
In the present embodiment, in the step a, the device in Gas is condensed using shell-and-tube methane gas heat exchanger 3,
Shell heat exchanger 3 is also known as tubular heat exchanger 3, is to close the wall surface restrained in the housing as the wall-type heat exchange of heat-transfer area
Device 3, this 3 structure of heat exchanger is simpler, and operation is reliable.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (6)
1. a kind of method to be generated electricity using coal mine light concentration mash gas, which comprises the following steps:
A. device in Gas is condensed using cold water made from absorption refrigeration unit；
B. the condensed device in Gas is dehydrated；
C. the dewatered device in Gas input gas electricity unit is generated electricity；
D. the high-temperature flue gas that the gas electricity unit is discharged is delivered to the absorption refrigeration unit, and to absorption refrigeration
The aqueous solutions of absorbent of unit carries out heating concentration；
It further include the device in Gas water content of step e. real-time monitoring input gas generator, and the water content by measuring is real
When control input the high-temperature flue gas flow of the absorption refrigeration unit；
The step e includes:
E1. the device in Gas water content of real-time monitoring input gas generator；
E2. when the water content is more than preset threshold, the high-temperature flue gas stream for inputting the absorption refrigeration unit is gradually increased
Amount；
E3. when the water content is less than or equal to given threshold, the high temperature for currently inputting the absorption refrigeration unit is kept
Flue gas flow.
2. the method according to claim 1 to be generated electricity using coal mine light concentration mash gas, it is characterised in that: in the step a,
Before device in Gas is condensed, preliminary hydro-extraction should be carried out.
3. the method according to claim 2 to be generated electricity using coal mine light concentration mash gas, it is characterised in that: the absorption system
Cold group is BrLi chiller.
4. the method according to claim 3 to be generated electricity using coal mine light concentration mash gas, it is characterised in that: further include step f.
According to the refrigerating capacity of absorption refrigeration unit described in the water content real-time control measured.
5. the method according to claim 4 to be generated electricity using coal mine light concentration mash gas, it is characterised in that: the step f packet
It includes:
F1. when the water content is more than preset threshold, the circulation of cold water made from the absorption refrigeration unit is gradually increased
Flow；
F2. when the water content is less than or equal to given threshold, cold water made from presently described absorption refrigeration unit is kept
Circular flow.
6. the method according to claim 5 to be generated electricity using coal mine light concentration mash gas, it is characterised in that: in the step a,
The device in Gas is condensed using shell-and-tube methane gas heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710239163.9A CN106958495B (en) | 2017-04-13 | 2017-04-13 | The method to be generated electricity using coal mine light concentration mash gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710239163.9A CN106958495B (en) | 2017-04-13 | 2017-04-13 | The method to be generated electricity using coal mine light concentration mash gas |
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| CN106958495A CN106958495A (en) | 2017-07-18 |
| CN106958495B true CN106958495B (en) | 2019-08-27 |
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| CN110479019A (en) * | 2019-08-28 | 2019-11-22 | 贵州大学 | A kind of low concentration gas filter device for coal mining |
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| JP4452101B2 (en) * | 2004-03-08 | 2010-04-21 | 三井造船株式会社 | Gas hydrate production system |
| CN102383868A (en) * | 2010-08-30 | 2012-03-21 | 刘俊德 | Method and device for comprehensively utilizing energy of high-pressure natural gas |
| CN103277130A (en) * | 2013-05-24 | 2013-09-04 | 中国矿业大学 | Mine area distribution type poly-generation energy supplying system with coal mine gas emission close to zero |
| CN104232197A (en) * | 2014-09-11 | 2014-12-24 | 北京扬德环境科技股份有限公司 | Device and method for carrying out gas dehydration by using power-generation waste heat |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1239863C (en) * | 2003-04-11 | 2006-02-01 | 清华大学 | Heat pump type heat and electricity combined supply system by using internal combustion engine as power |
| US7231784B2 (en) * | 2004-10-13 | 2007-06-19 | Praxair Technology, Inc. | Method for producing liquefied natural gas |
| CN103185415A (en) * | 2013-03-27 | 2013-07-03 | 北京京诚泽宇能源环保工程技术有限公司 | High-temperature flue gas waste heat recovery air-conditioning refrigerating system of continuous heating furnace |
| CN103335445B (en) * | 2013-07-05 | 2015-06-10 | 中国石油集团工程设计有限责任公司 | System and method for utilizing gas-driven compressor waste heat |
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- 2017-04-13 CN CN201710239163.9A patent/CN106958495B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4452101B2 (en) * | 2004-03-08 | 2010-04-21 | 三井造船株式会社 | Gas hydrate production system |
| CN102383868A (en) * | 2010-08-30 | 2012-03-21 | 刘俊德 | Method and device for comprehensively utilizing energy of high-pressure natural gas |
| CN103277130A (en) * | 2013-05-24 | 2013-09-04 | 中国矿业大学 | Mine area distribution type poly-generation energy supplying system with coal mine gas emission close to zero |
| CN104232197A (en) * | 2014-09-11 | 2014-12-24 | 北京扬德环境科技股份有限公司 | Device and method for carrying out gas dehydration by using power-generation waste heat |
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