CN109027991A - Low concentration coal-bed gas separation enrichment is coupled with heat-electricity-cold combined supply utilizes system and technique - Google Patents
Low concentration coal-bed gas separation enrichment is coupled with heat-electricity-cold combined supply utilizes system and technique Download PDFInfo
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- CN109027991A CN109027991A CN201810414659.XA CN201810414659A CN109027991A CN 109027991 A CN109027991 A CN 109027991A CN 201810414659 A CN201810414659 A CN 201810414659A CN 109027991 A CN109027991 A CN 109027991A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/065—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion taking place in an internal combustion piston engine, e.g. a diesel engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
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- 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
- F25B30/00—Heat pumps
- F25B30/04—Heat pumps of the sorption type
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- 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
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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Abstract
The invention discloses a kind of low concentration coal-bed gas separation enrichments to couple with heat-electricity-cold combined supply using system and technique, which includes separator, ventilation air methane oxidation device, internal combustion engine, waste heat boiler, steam turbine, absorption heat pump；Combined cooling, heat and power System is made of internal combustion engine, waste heat boiler, steam turbine, absorption heat pump.The concentration of methane in coal bed gas is promoted to 10% or more using solution low temperature absorption and high temperature regeneration method by low concentration coal-bed gas by the system, to the concentration of regular coal seam gas, and then stablizes fuel gas-steam/Organic Rankine Cycle power generation and heat pump cycle heat supply and refrigeration；Simultaneously using heat pump cycle for the separation of thermal drivers solution high temperature regeneration and coal bed gas, realize that the coupling of the separation enrichment and heat-electricity-cold combined supply of low concentration coal-bed gas utilizes.The present invention realizes the full concentration range of low concentration coal-bed gas and utilizes, and methane drainage and utilization project rate is 100%, while also achieving the stabilization alliance of system thermoelectric cold.
Description
Technical field
The present invention relates to a kind of low concentration coal-bed gas separation enrichments to couple with heat-electricity-cold combined supply using system and technique, belongs to
Resource gas distribution utilizes system regions.
Background technique
Low concentration coal-bed gas refer to the volume percent methane in coal bed gas lower than 30%, and concentration and flow can with extraction and
Big ups and downs, it is contemplated that explosion limit is 5%-16% to methane at normal temperatures and pressures, and long-distance sand transport security risk is larger, with regard to land productivity
With for optimal path.Low concentration coal-bed gas is generally utilized using combustion engine powered circulating generation, since exhaust gas temperature is higher, often
Energy regenerating is carried out using Steam Power Circulation or Organic Rankine Cycle, and combines lithium bromide/hydro-thermal pump realization waste heat depth
It utilizes.Currently, existing technology successfully can utilize volumetric concentration in the low concentration coal-bed gas of 9%-30%, but lower than 9%
Low concentration coal-bed gas there is no effective use means.
Volume percent methane is generally less than 2% in mine air-lack, and has the characteristics that flow is big and fluctuation of concentration is big, generally
It can be utilized using the method for oxidation, in no catalyst and in the case where fully rely on self-heating to maintain ventilation air methane oxidation,
Ask the concentration of methane 0.5% or more.Acutely in view of the variation of idle air operating condition, the volumetric concentration of methane also big ups and downs in idle air,
Often less than 0.5%, challenge is proposed to self-heating type ventilation air methane oxidation Land use systems.
70% is low concentration coal-bed gas in existing coal bed gas extraction mine, and with extraction big ups and downs can occur for concentration,
When being lower than 9%, system is unable to operate normally.This is also the main original that current China's coal bed gas methane drainage and utilization project rate is only 35% or so
Cause.The CBM Drainage for largely failing to utilize is put into atmosphere, polluted environment.
Summary of the invention
The present invention is intended to provide a kind of low concentration coal-bed gas separation enrichment is coupled with heat-electricity-cold combined supply using system and technique,
It realizes the full concentration range of low concentration coal-bed gas to utilize, methane drainage and utilization project rate is 100%, while also achieving the steady of system thermoelectric cold
Determine alliance.
The present invention by low concentration coal-bed gas using solution low temperature absorption and high temperature regeneration method by coal bed gas methane it is dense
Degree is promoted to 10% or more, to the concentration of regular coal seam gas, and then stablizes fuel gas-steam/Organic Rankine Cycle power generation and heat pump
Circulation heating and refrigeration；Low concentration is realized for the separation of thermal drivers solution high temperature regeneration and coal bed gas using heat pump cycle simultaneously
The coupling of the separation enrichment and heat-electricity-cold combined supply of coal bed gas utilizes.
It is coupled the present invention provides a kind of low concentration coal-bed gas separation enrichment with heat-electricity-cold combined supply and utilizes system, comprising: point
From device, ventilation air methane oxidation device, internal combustion engine, waste heat boiler, steam turbine, absorption heat pump；Combined cooling, heat and power System is by internal combustion engine, remaining
Heat boiler, steam turbine, absorption heat pump composition.
Separator includes solution absorber, solution separator and cooler；Solution absorber, solution separator and cooling
Device is sequentially connected one circulation loop of composition, and separator will be less than 9% coal bed gas separation and concentrate to 10%-20%, convenient for interior
Combustion engine burning utilizes；
The outlet of solution separator is separately connected ventilation air methane oxidation device and internal combustion engine, and internal combustion engine connects waste heat boiler and generator, is
Waste heat boiler provides high-temperature flue gas；The outlet of ventilation air methane oxidation device connects waste heat boiler, provides high-temperature flue gas for waste heat boiler；Waste heat
The outlet of boiler connects absorption heat pump and steam turbine, and the high-temperature flue gas in waste heat boiler provides high warm for absorption heat pump
Source；Steam turbine connects absorption heat pump by cooler, and recirculated cooling water also provides low-temperature heat source simultaneously for absorption heat pump；Vapour
Take turns machine driving generator power generation；Absorption heat pump is connect with solution separator, provides heat for it, the absorption heat pump other end connects
Connect downstream user.
It is coupled the present invention provides a kind of low concentration coal-bed gas separation enrichment with heat-electricity-cold combined supply and utilizes technique, including is following
Step:
(1) low concentration coal-bed gas enters in separator, separator by volumetric concentration lower than 9% coal bed gas separation, concentrate extremely
10%-20% utilizes convenient for combustion in IC engine；
(2) coal bed gas of steady concentration combustion power generation in internal combustion engine, the high-temperature flue gas of discharge enter waste heat boiler heating and its
United Steam Power Circulation or Organic Rankine Cycle；
(3) in ventilation air methane oxidation device, the concentration of idle air, which is stablized by blending coal bed gas in 1%-2%, and by self-heating, maintains idle air
The high-temperature flue gas of oxidation reaction, generation enters waste heat boiler, using high-temperature flue gas heat Steam Power Circulation in conjunction or
Organic Rankine Cycle；
(4) heat source of the part of smoke as driving heat pump system is extracted in waste heat boiler, heat pump system provides low concentration coal
Layer gas separate required energy in separation system, while to user's heat supply and cooling supply.
Specifically, above-mentioned technique the following steps are included:
(1) volumetric concentration initially enters solution absorber lower than 9% coal bed gas, absorbs or dissolves at low temperature, low temperature environment by
Outer loop water cooler provides；Absorb complete after is separated in solution separator, needed in solution separator at this time by
Solution is heated to high temperature, and institute's calorific requirement is provided by absorption heat pump；
(2) after separation is completed, solution is cooled to low-temperature condition through cooler, continues to absorb, and completes an absorption and separation
Circulation；
(3) the coal bed gas volume percent methane that separation obtains reaches 10% or more, when by adjusting circulating ratio and absorbing, separate
Between adjustable required volume percent methane；Coal bed gas methane concentration after enrichment keep stable or more actual heat supply,
Refrigeration or generation load adjustment, doing manual work into combustion in IC engine and passing through generator exports electric work；
(4) high-temperature flue gas of internal combustion engine discharge as one of heat source into waste heat boiler, by by low concentration coal-bed gas and idle air
Concentration of the blending to stablize methane in idle air maintains the oxidation reaction in ventilation air methane oxidation device, the high-temperature flue gas of generation is held to 1%-2%
Continue, one of the heat source for being stably used as waste heat boiler；
(5) waste heat boiler heats the working medium in Steam Power Circulation or Organic Rankine Cycle as high temperature heat source: water is organic
Working medium, the working medium of high temperature and pressure, which enters steam turbine, does manual work and passes through generator and export electric work；
(6) steam exhaust is condensed through water recirculator, and the low-temperature heat source as absorption heat pump, while being extracted in waste heat boiler
Driving high temperature heat source of a part of high-temperature flue gas as absorption heat pump；
(7) absorption heat pump is simultaneously or selectivity realizes heat supply and refrigeration, while exporting a part of heat to solution separator and using
Promote coal bed gas separation with heated solution.
The ultimate density of low concentration coal-bed gas enrichment should be higher than that 10%, but specific value should be with the using energy source of whole system
Efficiency optimizes for target.It is fully utilized so that low concentration coal-bed gas to be lower than in 30% range in volume percent methane as target,
And the utilization rate of low concentration coal-bed gas is 100%.
Other low concentration resource gases are utilized, such as coke-stove gas, can also be similarly used and separate gas
Enrichment and thermodynamics realize making full use of for resource using the method being coupled.
The exhaust gas temperature of ventilation air methane oxidation device and internal combustion engine is 400-500 DEG C, enters waste heat boiler, together to increase waste heat
The output of boiler acting quantity of steam.
The absorption temperature of solution is but unsuitable too high or too low with seasonal variations, and the absorption temperature in winter is 10-15 DEG C, the summer
The absorption temperature in season is 15-30 DEG C.The duty parameter that different solution absorbs the corresponding combined cooling, heat and power System of temperature is different, answers
Under the premise of low concentration coal-bed gas full utilization, joined using improving system energy utilization efficiency as objective optimization each section operating condition
Number.
In solution separator, the separation temperature of solution is 80-120 DEG C, and separation institute's calorific requirement has absorption heat pump to be provided.
Beneficial effects of the present invention: low concentration coal-bed gas is subjected to absorption and separation enrichment, stablizes Combined Heating Cooling And Power
Energy supply, while itself is separated without consuming high-grade energy, the thermal energy generated with only system.
Detailed description of the invention
Fig. 1 is coupled with heat-electricity-cold combined supply for low concentration coal-bed gas separation enrichment and is utilized system schematic.
In figure, 1. solution absorbers；2. solution separator；3. cooler；4. internal combustion engine；5. generator；6. ventilation air methane oxidation
Device；7. waste heat boiler；8. steam turbine；9. cooler；10. absorption heat pump；11. generator.
Specific embodiment
The present invention is further illustrated below by embodiment, but is not limited to following embodiment.
Embodiment:
Low concentration coal-bed gas separation enrichment provided by the invention is coupled with heat-electricity-cold combined supply utilizes method, comprising the following steps:
Low concentration coal-bed gas (< 9%) initially enters solution absorber (1), absorbed under low temperature (summer and winter respectively different) or
Dissolution, low temperature environment are provided by outer loop water cooler (3)；The separation in solution separator (2) after completing is absorbed, at this time
Need for solution to be heated to high temperature, institute's calorific requirement is provided by absorption heat pump (10)；After separation is completed, solution is through cooler
(3) it is cooled to low-temperature condition, continues to absorb, completes an absorption and separation circulation；Separate the coal bed gas methane volumetric obtained
Concentration should be 10% or more, by adjusting circulating ratio and absorption, the adjustable required volume percent methane of disengaging time；Increase
Coal bed gas methane concentration after dense can keep stable or more actual heat supply, refrigeration or generation load adjustment, into internal combustion engine
(4) burning does manual work and exports electric work by generator (5)；Internal combustion engine (4) discharge high-temperature flue gas as one of heat source entrance more than
Heat boiler (7), at the same time, by blending low concentration coal-bed gas and idle air to stablize the concentration of methane in idle air to 1% left side
The right side, maintains the oxidation reaction in ventilation air methane oxidation device (6), and the high-temperature flue gas of generation continues, is stably used as the heat of waste heat boiler (7)
One of source；Waste heat boiler (7) heats the working medium in Steam Power Circulation or Organic Rankine Cycle as high temperature heat source: water has
Machine working medium, the working medium of high temperature and pressure enter steam turbine (8) and do manual work and export electric work by generator (11)；(this refers to vapour for steam exhaust
The exhaust of turbine) it is condensed through water recirculator (9), and the low-temperature heat source as absorption heat pump (10), while in waste heat pot
Driving high temperature heat source of a part of high-temperature flue gas as absorption heat pump (10) is extracted in furnace；Absorption heat pump (10) can be simultaneously
Or selectivity realizes heat supply and refrigeration, while exporting a part of heat and promoting coal seam to heated solution to solution separator (2)
Gas separation.
Above system building it is critical that by low concentration coal-bed gas carry out absorption and separation enrichment, stablize thermoelectric cold cogeneration
The energy supply of system, while itself is separated without consumption high-grade energy, with only the thermal energy of system generation.
It is described that the specific implementation is as follows:
Solution absorber (1), solution separator (2) constitute low concentration coal-bed gas with cooler (3) and separate circulation in this system,
The temperature that solution absorbs depends on the low-temperature heat source temperature that cooler can be provided, and winter is 10-15 DEG C, and summer is 15-30 DEG C,
It is said from separative efficiency, temperature is lower, and the temperature difference is bigger, and the concentration difference of corresponding methane in the solution is also bigger, and separating effect is better；
But from the point of view of energy consumption, since separation solution often needs have lower saturated vapor pressure, having for larger molecular weight is often used
The viscosity of machine object or ionic liquid etc., substance of this kind is in exponential increase as temperature reduces, and increases the pump work of circulation.Coal bed gas
Main component be N2、O2And CH4, the different solubility of three kinds of gases in the solution, will absorb complete, contain higher CH4Contain
The solution of amount is heated to 80-120 DEG C, can release gas, and regenerate solution, and solution separated heating institute calorific requirement has absorption
Formula heat pump (10) is provided；Solution separation temperature is higher, and the temperature difference is also bigger, and corresponding separating effect is also better, but improves temperature,
It is intended to consume more thermal energy；In the operation of actual low concentration coal-bed gas absorption and separation enrichment system, final coal seam
Gas volume percent methane be often have many condition determine, these conditions include: absorb temperature, separation temperature, circular flow and
Circulating ratio, comprehensively considers these conditions, just can determine that optimal separation concentration.
This system devises idle air-coal bed gas and mends adjusting system, when the concentration of coal bed gas in idle air is lower than its autothermal reaction institute
Needing concentration is, appropriate coal bed gas of supplementing is filled into and inhaled through solution if the concentration of coal bed gas is also too low with the concentration for stablizing idle air
Coal bed gas after receiving device (1) and separator (2).
Combined cooling, heat and power System is formed by internal combustion engine (4), waste heat boiler (7), steam turbine (8), absorption heat pump (10).It is weary
Wind oxidator (6) and the exhaust gas temperature of internal combustion engine (4) are 400-500 DEG C, enter waste heat boiler (2) together, to increase waste heat
The output of boiler acting quantity of steam.Absorption heat pump (10) need to export relevant temperature heat according to coal bed gas separator temperature demand
Amount is to solution separator (2), and generally 80-120 DEG C.
System in the process of running, will consider the utilization efficiency of low concentration coal-bed gas entirety, guarantee 30% or less coal seam
Under the premise of the full concentration range stable operation of gas, optimize best point of various concentration under operating condition of each coal seam gas concentration lower than 9%
From concentration, to realize the efficient utilization of full concentration range.
Claims (8)
1. a kind of low concentration coal-bed gas separation enrichment is coupled with heat-electricity-cold combined supply utilizes system, it is characterised in that: filled including separation
It sets, ventilation air methane oxidation device, internal combustion engine, waste heat boiler, steam turbine, absorption heat pump；Combined cooling, heat and power System is by internal combustion engine, waste heat pot
Furnace, steam turbine, absorption heat pump composition；
Separator includes solution absorber, solution separator and cooler；Solution absorber, solution separator and cooler according to
Secondary connection forms a circulation loop, and separator will be less than 9% coal bed gas separation and concentrate to 10% or more, be convenient for internal combustion engine
Burning utilizes；
The outlet of solution separator is separately connected ventilation air methane oxidation device and internal combustion engine, and internal combustion engine connects waste heat boiler and generator, is
Waste heat boiler provides high-temperature flue gas；The outlet of ventilation air methane oxidation device connects waste heat boiler, provides high-temperature flue gas for waste heat boiler；Waste heat
The outlet of boiler connects absorption heat pump and steam turbine, and the high-temperature flue gas in waste heat boiler provides high warm for absorption heat pump
Source；Steam turbine connects absorption heat pump by cooler, provides low-temperature heat source for absorption heat pump；Steam Turbine Driven generator hair
Electricity；Absorption heat pump is connect with solution separator, provides heat for it, the absorption heat pump other end connects downstream user.
2. a kind of low concentration coal-bed gas separation enrichment is coupled with heat-electricity-cold combined supply using technique, using system described in claim 1
System, it is characterised in that: the following steps are included:
(1) low concentration coal-bed gas enters in separator, separator by volumetric concentration lower than 9% coal bed gas separation, concentrate extremely
10% or more, it is utilized convenient for combustion in IC engine；
(2) coal bed gas of steady concentration combustion power generation in internal combustion engine, the high-temperature flue gas of discharge enter waste heat boiler heating and its
United Steam Power Circulation or Organic Rankine Cycle；
(3) in ventilation air methane oxidation device, the concentration of idle air, which is stablized by blending coal bed gas in 1%-2%, and by self-heating, maintains idle air
The high-temperature flue gas of oxidation reaction, generation enters waste heat boiler, using high-temperature flue gas heat Steam Power Circulation in conjunction or
Organic Rankine Cycle；
(4) heat source of the part of smoke as driving heat pump system is extracted in waste heat boiler, heat pump system provides low concentration coal
Layer gas separate required energy in separation system, while to user's heat supply and cooling supply.
3. low concentration coal-bed gas separation enrichment according to claim 2 is coupled with heat-electricity-cold combined supply utilizes technique, feature
It is: the following steps are included:
(1) volumetric concentration initially enters solution absorber lower than 9% coal bed gas, absorbs or dissolves at low temperature, low temperature environment by
Outer loop water cooler provides；Absorb complete after is separated in solution separator, needed in solution separator at this time by
Solution is heated to high temperature, and institute's calorific requirement is provided by absorption heat pump；
(2) after separation is completed, solution is cooled to low-temperature condition through cooler, continues to absorb, and completes an absorption and separation
Circulation；
(3) the coal bed gas volume percent methane that separation obtains reaches 10% or more, when by adjusting circulating ratio and absorbing, separate
Between adjustable required volume percent methane；Coal bed gas methane concentration after enrichment keep stable or more actual heat supply,
Refrigeration or generation load adjustment, doing manual work into combustion in IC engine and passing through generator exports electric work；
(4) high-temperature flue gas of internal combustion engine discharge as one of heat source into waste heat boiler, by by low concentration coal-bed gas and idle air
Concentration of the blending to stablize methane in idle air maintains the oxidation reaction in ventilation air methane oxidation device, the high-temperature flue gas of generation is held to 1% ~ 2%
Continue, one of the heat source for being stably used as waste heat boiler；
(5) waste heat boiler heats the working medium in Steam Power Circulation or Organic Rankine Cycle as high temperature heat source: water is organic
Working medium, the working medium of high temperature and pressure, which enters steam turbine, does manual work and passes through generator and export electric work；
(6) steam exhaust is condensed through water recirculator, and the low-temperature heat source as absorption heat pump, while being extracted in waste heat boiler
Driving high temperature heat source of a part of high-temperature flue gas as absorption heat pump；
(7) absorption heat pump is simultaneously or selectivity realizes heat supply and refrigeration, while exporting a part of heat to solution separator and using
Promote coal bed gas separation with heated solution.
4. low concentration coal-bed gas separation enrichment according to claim 3 is coupled with heat-electricity-cold combined supply utilizes technique, feature
Be: the concentration after low concentration coal-bed gas enrichment is 10%-20%.
5. low concentration coal-bed gas separation enrichment according to claim 3 is coupled with heat-electricity-cold combined supply utilizes technique, feature
Be: the exhaust gas temperature of ventilation air methane oxidation device and internal combustion engine is 400-500 DEG C, enters waste heat boiler, together to increase waste heat pot
The output of furnace acting quantity of steam.
6. low concentration coal-bed gas separation enrichment according to claim 3 is coupled with heat-electricity-cold combined supply utilizes technique, feature
Be: absorbing liquid used in solution absorber is amine or ionic liquid.
7. low concentration coal-bed gas separation enrichment according to claim 3 is coupled with heat-electricity-cold combined supply utilizes technique, feature
It is: in solution absorber, the absorption temperature of solution are as follows: the absorption temperature in winter is 10-15 DEG C, and the absorption temperature of summer is
15-30℃。
8. low concentration coal-bed gas separation enrichment according to claim 3 is coupled with heat-electricity-cold combined supply utilizes technique, feature
Be: in solution separator, the separation temperature of solution is 80-120 DEG C, and separation institute's calorific requirement has absorption heat pump to be provided.
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Application publication date: 20181218 |
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| RJ01 | Rejection of invention patent application after publication |