CN105221363B - Middle low temperature underground heat and biological fuel gas combined generating system and cost of electricity-generating computational methods - Google Patents
Middle low temperature underground heat and biological fuel gas combined generating system and cost of electricity-generating computational methods Download PDFInfo
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Abstract
A kind of middle low temperature underground heat and biological fuel gas combined generating system, are characterized in：Working medium superheater, prime mover including working medium evaporator and gas fired-boiler, generator connection, prime mover are connected with working medium condenser, working medium storage bin, and working medium storage bin is connected by working medium booster with the working medium preheater of gas fired-boiler；Producing well connects with underground heat water treatment facilities, working medium evaporator, and working medium evaporator connects with heating tube in heating tube in second, first, and heating tube connects with inverted well, underground heat storage, producing well in first；Biomass is connected with acidification hydrolization tank and connected by biogas residue circulating pump with biogas residue fermentation tank and natural pond fertilizer, and biogas residue fermentation tank is connected by the first combustion gas booster with air accumulator；Acidification hydrolization tank is connected by organic acid circulating pump with anaeroic digestor, and anaeroic digestor is connected by the second combustion gas booster with the burner of air accumulator, gas fired-boiler；Anaeroic digestor filler module is placed in anaeroic digestor.And provide its cost of electricity-generating computational methods.
Description
Technical field
The present invention relates to multiple renewable energy sources to combine technical field of power generation, is a kind of middle low temperature underground heat and biological fuel gas
Combined generating system and cost of electricity-generating computational methods.
Background technology
The one kind of geothermal energy as natural energy resources, reserves big (about global 1.7 hundred million times of coal storage), low-carbon, cleaning, can be straight
Utilization is connect, it is advantageous that：In lifetime, do not influenceed and energy continuous-stable supply by rain or shine day-night change.Find out in China
Equivalent to 2,000,000,000,000,000 tons mark coals of geothermal energy resources, account for the whole world and found out the 40% of geothermal energy resources amount, but its overwhelming majority belongs to
Medium temperature (150-90 DEG C) low temperature (<90 DEG C) geothermal energy resources, because its working medium enthalpy drop is too small, the thermal efficiency is very low (only 3%~6%), no
Steam Power Circulation generating is can be directly used for, and is abandoned.
In addition, biomass energy is a kind of regenerative resource of rich reserves, can be generated electricity with coal for mixing combustion to substitute the change of part
The stone energy, meanwhile, biomass energy ignition temperature is high, is remarkably improved power cycle working medium initial temperature, but biomass energy conduct
Power generation energy resource is disadvantageous in that：Energy density is low, and the utilization rate of its direct combustion only has 10%, and the region of straw utilization only limits
In arable land area, and China's cultivated area only accounts for the 12.68% of area；The high dedicated energy plant of energy density but with grain
Food crop strives ground.To improve biomass energy utilization rate, its Land use systems is changed to anaerobic fermentation by direct combustion, its energy utilization rate
It can reach more than 60%.
The content of the invention
The object of the present invention is to be directed to, middle low temperature system for geothermal production of electricity temperature is low, heat is big, and biological fuel gas burning is produced
The characteristics of flue-gas temperature is high, heat is few, and anaerobic digester system biomass material not easily collecting, cause its aerogenesis finite capacity
Present situation, by being combined and innovating to prior art, there is provided a kind of middle low temperature underground heat and biological fuel gas cogeneration system
System, is characterized in, using heat is big, temperature is low middle low temperature underground heat as power cycle working medium evaporation thermal source, temperature height, heat compared with
Few biological flue gas overheats thermal source as working medium, realize it is continuous, stably, efficiency power generation；And the structure composition based on system and change
Thermal process, scientific and reasonable, strong applicability is established, the cost of electricity-generating of combined generating system can be calculated, assess systematic economy effect
Middle low temperature underground heat and biological fuel gas the combined generating system cost of electricity-generating appraisal procedure of benefit.
Realize that one of technical scheme is used by the object of the invention：A kind of middle low temperature underground heat and biological fuel gas joint hair
Electric system, it is characterised in that：It includes the low temperature side gaseous working medium output end of working medium evaporator 11 and the working medium mistake of gas fired-boiler 23
The hot low temperature side input of device 21 connection, the low temperature side output end of working medium superheater 21 and the input of prime mover 24 of gas fired-boiler 23 connect
Logical, prime mover 24 is connected with generator 25, and the output end of prime mover 24 connects with the input of working medium condenser 26, working medium condenser 26
Output end connects with the input of working medium storage bin 27, and the output end of working medium storage bin 27 passes through working medium booster 28 and gas fired-boiler 23
The connection of the low temperature side input of working medium preheater 22, the low temperature side output end of working medium preheater 22 of gas fired-boiler 23 evaporates with working medium
The low temperature side liquid refrigerant input of device 11 connects；The output end of producing well 7 connects with the input of underground heat water treatment facilities 10, GEOTHERMAL WATER
The output end of processing unit 10 connects with the high temperature side underground heat water inlet of working medium evaporator 11, and the high temperature side GEOTHERMAL WATER of working medium evaporator 11 goes out
Mouth is connected by underground heat water-circulating pump 12 with the input of heating tube in second 18, is added in second in the output end of heating tube 18 and first
The input of heat pipe 3 connects, and the output end of heating tube 3 connects with the input of inverted well 8 in first, and the output end of inverted well 8 passes through underground
Heat storage 9 connects with the input of producing well 7；Biomass 1 connects with the first input end of acidification hydrolization tank 2, and acidification hydrolization tank 2 first is defeated
Going out end to connect with the input of biogas residue fermentation tank 5 by biogas residue circulating pump 4, the output end of biogas residue fermentation tank 5 first connects with natural pond fertilizer 6,
The output end of biogas residue fermentation tank 5 second is connected by the first combustion gas booster 13 with the first input end of air accumulator 14；Acidification hydrolization tank 2
Second output end is connected by organic acid circulating pump 17 with the input of anaeroic digestor 16, and the output end of anaeroic digestor 16 first is led to
Cross acid solution circulating pump 29 to connect with the input of acidification hydrolization tank 2 second, the output end of anaeroic digestor 16 second passes through the second combustion gas
Booster 15 connects with the input of air accumulator 14 second, and the output end of air accumulator 14 connects with the burner 20 of gas fired-boiler 23；Detest
Oxygen digester filler module 19 is placed in anaeroic digestor 16.
The working medium condenser 26 include direct water supply water-cooled surfaces formula condenser, wet cooling tower surface condenser,
Direct air cooled condenser, surface-type indirect air cooling condenser, hybrid indirect air cooling condenser.
The anaeroic digestor filler module 19 includes tube sheet 31, frame support 30 and particle branch pipe 33, is bored on tube sheet 31
There is a plate hole 32 of cross arrangement, insertion porous porous particle support 33 in plate hole 32, porous porous particle support is embedded with for 33 time more
Hole particle 34,31 4 jiaos of tube sheet is combined into upper and lower, front and rear penetrating anaeroic digestor filler module 19 by frame support 30, more
The particle diameter of hole particle 34 is 5-10mm, and the spacing of porous particle 34 is 2-5mm, below the diameter 0.5mm of porous porous particle support 33.
The underground heat water treatment facilities 10 includes the output end of moisture trap 41 first and connected with the input of biological desulphurization tower 42
Logical, the output end of biological desulphurization tower 42 connects with the delivery end of purification gas 43；The output end of moisture trap 41 second is removed with spiral-flow type
The input of sand device 45 connects, and the output end of spiral-flow type desanding device 45 connects with the input of manganese sand tramp iron separator 46, and manganese sand tramp iron separator 46 is defeated
Go out end to connect with the input of adsorption tanks 48 by booster water pump 47, calcium ions and magnesium ions adsorbent 49 is provided with adsorption tanks 48.
Realizing two of technical scheme used by the object of the invention is：A kind of middle low temperature underground heat and biological fuel gas joint hair
Electric system cost of electricity-generating computational methods, it is characterised in that：Cost of electricity-generating mainly includes the equipment investment of underground heat evaporation working medium, biomass
Hot working fluid equipment investment, generator set device investment, biomass material cost and operation expense, whole system are crossed in combustion gas
Cost of electricity-generating simple calculating method is by following equation group quantitative descriptions：
Underground heat evaporates working medium equipment investment：
Kinvest,geo=egeo·Pgeo (1)
Biological fuel gas crosses hot working fluid equipment investment：
Kinvest,bio=(Qbio/Cbio,gas)·ebio,gas (4)
Generator set device is invested：
Kinvest,plant=Pnet·eplant (5)
System equipment gross investment：
Kinvest=Kinvest,bio+Kinvest,geo+Kinvest,plant (6)
Year biomass fuel cost：
Kfuel=(Qbio/Cbio,gas)·ebiomass (7)
Year operation expense：
KO&M=Pnet·eO&M (8)
Year the accumulative total of generating electricity：
Enet=Pnet·τa (9)
Cost of electricity-generating：
Wherein, Kinvest,geoGeothermal energy evaporates working medium equipment investment, PgeoSingle geothermal generator pool-size, egeoUnit is held
Measure geothermal energy evaporation working medium equipment investment, Kinvest,bioBiological fuel gas crosses hot working fluid equipment investment, xbioBiomass utilization point
Number, hbioWorking medium superheater outlet working medium enthalpy, hgeoWorking medium evaporator outlet working medium enthalpy, hn,lWorking medium evaporator inlet working medium
Enthalpy, QbioBiological fuel gas crosses hot working fluid annual heat consumption, ηbThe biological mass gas burnnig boiler thermal efficiency, τaSystem year run time,
Cbio,gasBiomass fuel gas calorific value, ebio,gasUnit volume biological fuel gas production cost, Kinvest,plantGenerator set device is thrown
Money, PnetSystem total installation of generating capacity, eplantUnit capacity generator set device is invested, KinvestSystem equipment gross investment, KfuelYear
Accumulative biomass material cost, ebiomassUnit mass biomass material cost, KO&MYear operation expense, eO&MUnit capacity
Generating set year operation expense, EnetYear the accumulative total of generating electricity, LEC cost of electricity-generatings, crf capital recovery factors, KinsuranceYear
Insurance premium rate, kdActual debts interest rate；N unit depreciation periods；
Simultaneous formula (2), formula (3), formula (4), determine Kinvest,bio, then simultaneous formula (1), formula (5), formula (6), determine Kinvest,
Simultaneous formula (7), formula (8), formula (9), formula (10), formula (11) determine LEC.
The advantages of middle low temperature underground heat and biological fuel gas combined generating system of the present invention, is embodied in：
1) using lower boiling material as power cycle working medium, such as green working medium of ammonia, carbon dioxide, organic working medium,
Cryogenically heat from heat source is gasificated into saturated vapor in being absorbed in working medium evaporator, can expand and do under the conditions of low ambient temperature again
Work(simultaneously avoids freezing；
2) using the middle low temperature underground heat that temperature is low, heat is big as working medium gasification thermal source, the biomass fuel that temperature is higher, heat is small
Steam pot kiln gas is that working medium overheats thermal source, provides the stable energy for prime mover, provides prime mover group inlet condition, joint utilizes
Middle low temperature underground heat, biological fuel gas realize stable, efficient, clean electric power generation；
3) anaeroic digestor of system and acidification hydrolization tank use the recharge GEOTHERMAL WATER for still having certain temperature as heat source,
Anaeroic digestor and acidification hydrolization tank are entered according to the sequence of required heat source temperature by heating pipe built-in, improve its anaerobism
Digestion and the temperature of acidification hydrolization, and then anaerobic digestion and acidification hydrolization speed are improved, medium and high temperature anaerobic digestion process is realized,
Improve factor of created gase；
4) underground heat water treatment facilities order removes hydrogen sulfide, gravel, iron ion, calcium ions and magnesium ions etc., can suppress hydrogen sulfide pair
Heat exchanger tube corrodes, and prevents depositing gravel, avoids water-supply-pipe, heat exchanger tube deposition of iron thing accumulation, preventing and treating calcium ions and magnesium ions fouling etc.；
5) porous particle embedded with proper alignment in anaeroic digestor filler module, the rough surface of porous particle, favorably
In solidifying anaerobic bacteria and wide breeding space being provided for it, increase anaerobic bacteria contacts with organic acid to be exchanged probability and is carried for it
For sufficient nutrition, and then the proliferative speed and reproductive number of anaerobic bacteria are improved, strengthen the convective mass transfer of organic acid, exchanged heat
Journey, maintain organic acid temperature constant, uniform, improve anaerobic digester system gas production rate；
6) biological fuel gas superheater is concatenated on the basis of middle low temperature geothermal power generation, with the change of overtemperature,
Estimation apparatus is invested and generating total amount；
7) simple and reasonable for structure, cheap, no particular/special requirement equipment, exploitativeness is good, it is often more important that improving can
Renewable source of energy generation efficiency, realize regenerative resource efficiently, economic power generation, energy-saving and environmental protection significant effect；
8) low temperature underground heat and biological fuel gas combined generating system cost of electricity-generating computational methods in, pattern is formed based on system
With working medium heat exchange, acting process, according to the size of working medium overtemperature, geothermal source evaporation working medium part, biology are divided into
Matter fuel gas buring flue gas crosses hot working fluid part and generating set acting power generation part, is calculated according to the size of system overheat degree each
Equipment component investment, required biomass material cost, operation and maintenance cost, year the accumulative total of generating electricity, its methodological science is reasonable, can
The cost of electricity-generating of combined generating system is calculated, assesses the economic benefit of the system.
Brief description of the drawings
Fig. 1 is middle low temperature underground heat and biological fuel gas combined generating system structural representation；
Fig. 2 is anaeroic digestor filler modular structure schematic diagram；
Fig. 3 is GEOTHERMAL WATER processing device structure diagram；
Fig. 4 is that middle low temperature underground heat and biological fuel gas combined generating system thermal efficiency of cycle become with the change of working medium overtemperature
Gesture schematic diagram；
Fig. 5 is middle low temperature underground heat and biological fuel gas combined generating system unit gross output and energy-photoelectric transformation efficiency
With working medium overtemperature variation tendency schematic diagram；
Fig. 6 is middle low temperature underground heat and biological fuel gas combined generating system cost of electricity-generating with working medium overtemperature variation tendency
Schematic diagram.
In figure：1 biomass, 2 acidification hydrolization tanks, heating tube in 3 first, 4 biogas residue circulating pumps, 5 biogas residue fermentation tanks, 6 natural ponds fertilizer,
7 producing wells, 8 inverted wells, the storage of 9 underground heats, 10 underground heat water treatment facilities, 11 working medium evaporators, 12 underground heat water-circulating pumps, 13 first
Combustion gas booster, 14 air accumulators, 15 second combustion gas boosters, 16 anaeroic digestors, 17 organic acid circulating pumps, 18 second interior heating
Pipe, 19 anaeroic digestor filler modules, 20 gas burners, 21 working medium superheaters, 22 working medium preheaters, 23 gas fired-boilers, 24
Prime mover, 25 generators, 26 working medium condensers, 27 working medium storage bins, 28 working medium boosters, 29 acid cycle pumps, 30 frame branch
Frame, 31 tube sheets, 32 plate holes, 33 porous particle supports, 34 porous particles, 41 moisture traps, 42 biological desulphurization towers, 43 purified gas
Body, 45 spiral-flow type desanding devices, 46 manganese sand tramp iron separators, 47 booster water pumps, 48 adsorption tanks, 49 calcium ions and magnesium ions adsorbents.
Embodiment
Below with the drawings and specific embodiments, the invention will be further described.
Reference picture 1, middle low temperature underground heat and biological fuel gas combined generating system of the invention, including working medium evaporator 11 are low
Warm side gaseous working medium output end connects with the low temperature side input of working medium superheater 21 of gas fired-boiler 23, the working medium of gas fired-boiler 23
The low temperature side output end of superheater 21 is connected with the input of prime mover 24, and prime mover 24 is connected with generator 25, and prime mover 24 exports
End connects with the input of working medium condenser 26, and the output end of working medium condenser 26 connects with the input of working medium storage bin 27, working medium storage
Deposit the output end of case 27 to connect with the low temperature side input of working medium preheater 22 of gas fired-boiler 23 by working medium booster 28, gas-fired boiler
The low temperature side output end of working medium preheater 22 of stove 23 connects with the low temperature side liquid refrigerant input of working medium evaporator 11；Producing well 7
Output end connects with the input of underground heat water treatment facilities 10, the output end of underground heat water treatment facilities 10 and the high temperature side of working medium evaporator 11
Underground heat water inlet connects, and the high temperature side underground heat water out of working medium evaporator 11 passes through heating tube 18 in underground heat water-circulating pump 12 and second
Input connects, and the output end of heating tube 18 connects with the input of heating tube in first 3 in second, the output end of heating tube 3 in first
Connected with the input of inverted well 8, the output end of inverted well 8 is connected by underground heat storage 9 with the input of producing well 7；Biomass 1 and acid
Change the connection of the first input end of hydrolytic decomposition pot 2, the output end of acidification hydrolization tank 2 first is inputted by biogas residue circulating pump 4 and biogas residue fermentation tank 5
End connection, the output end of biogas residue fermentation tank 5 first are connected with natural pond fertilizer 6, and the output end of biogas residue fermentation tank 5 second is boosted by the first combustion gas
Pump 13 connects with the first input end of air accumulator 14；The output end of acidification hydrolization tank 2 second is disappeared by organic acid circulating pump 17 with anaerobism
Change the connection of the input of device 16, the output end of anaeroic digestor 16 first is inputted by acid cycle pump 29 and acidification hydrolization tank 2 second
End connection, the output end of anaeroic digestor 16 second are connected by the second combustion gas booster 15 with the input of air accumulator 14 second, are stored up
The output end of gas tank 14 connects with the burner 20 of gas fired-boiler 23；Anaeroic digestor filler module 19 is placed in anaeroic digestor 16
It is interior.
Reference picture 1, the working medium condenser 26 include direct water supply water-cooled surfaces formula condenser, wet cooling tower surface-type
Condenser, direct air cooled condenser, surface-type indirect air cooling condenser, hybrid indirect air cooling condenser.
Reference picture 2, anaeroic digestor filler module 19 include tube sheet 31, frame support 30 and particle branch pipe 33, tube sheet 31
On be drilled with the plate hole 32 of cross arrangement, insertion porous particle support 33 in plate hole 32, porous particle support 33 time is embedded with porous
Grain 34,31 4 jiaos of tube sheet are combined into upper and lower, front and rear penetrating anaeroic digestor filler module 19 by frame support 30, porous
34 particle diameters of grain are 5-10mm, and the spacing of porous particle 34 is 2-5mm, below the diameter 0.5mm of porous particle support 33.
Reference picture 3, underground heat water treatment facilities 10 input including the output end of moisture trap 41 first with biological desulphurization tower 42
End connection, the output end of biological desulphurization tower 42 connect with the delivery end of purification gas 43；The output end of moisture trap 41 second and eddy flow
The input of formula desander 45 connects, and the output end of spiral-flow type desanding device 45 connects with the input of manganese sand tramp iron separator 46, manganese sand tramp iron separator
46 output ends are connected by booster water pump 47 with the input of adsorption tanks 48, and calcium ions and magnesium ions adsorbent 49 is provided with adsorption tanks 48.
Reference picture 4- Fig. 6, middle low temperature underground heat and biological fuel gas combined generating system cost of electricity-generating calculates in of the invention
Method, mainly include the equipment investment of underground heat evaporation working medium, biological fuel gas crosses hot working fluid equipment investment, generator set device is thrown
Money, biomass material cost and operation expense, whole system cost of electricity-generating simple calculating method are determined by following equation groups
Amount description：
Underground heat evaporates working medium equipment investment：
Kinvest,geo=egeo·Pgeo (1)
Biological fuel gas crosses hot working fluid equipment investment：
Kinvest,bio=(Qbio/Cbio,gas)·ebio,gas (4)
Generator set device is invested：
Kinvest,plant=Pnet·eplant (5)
System equipment gross investment：
Kinvest=Kinvest,bio+Kinvest,geo+Kinvest,plant (6)
Year biomass fuel cost：
Kfuel=(Qbio/Cbio,gas)·ebiomass (7)
Year operation expense：
KO&M=Pnet·eO&M (8)
Year the accumulative total of generating electricity：
Enet=Pnet·τa (9)
Cost of electricity-generating：
Wherein, Kinvest,geoGeothermal energy evaporates working medium equipment investment, PgeoSingle geothermal generator pool-size, egeoUnit is held
Measure geothermal energy evaporation working medium equipment investment, Kinvest,bioBiological fuel gas crosses hot working fluid equipment investment, xbioBiomass utilization point
Number, hbioWorking medium superheater outlet working medium enthalpy, hgeoWorking medium evaporator outlet working medium enthalpy, hn,lWorking medium evaporator inlet working medium
Enthalpy, QbioBiological fuel gas crosses hot working fluid annual heat consumption, ηbThe biological mass gas burnnig boiler thermal efficiency, τaSystem year run time,
Cbio,gasBiomass fuel gas calorific value, ebio,gasUnit volume biological fuel gas production cost, Kinvest,plantGenerator set device is thrown
Money, PnetSystem total installation of generating capacity, eplantUnit capacity generator set device is invested, KinvestSystem equipment gross investment, KfuelYear
Accumulative biomass material cost, ebiomassUnit mass biomass material cost, KO&MYear operation expense, eO&MUnit capacity
Generating set year operation expense, EnetYear the accumulative total of generating electricity, LEC cost of electricity-generatings, crf capital recovery factors, KinsuranceYear
Insurance premium rate, kdActual debts interest rate；N unit depreciation periods；
Simultaneous formula (2), formula (3), formula (4), determine Kinvest,bio, then simultaneous formula (1), formula (5), formula (6), determine Kinvest,
Simultaneous formula (7), formula (8), formula (9), formula (10), formula (11) determine LEC.
A kind of middle low temperature underground heat and biological fuel gas combined generating system, specific work process of embodiment is：Working medium is steamed
The saturation gaseous working medium for sending out the gaseous working medium output end of the low temperature side of device 11 overheats into the low temperature side of working medium superheater 21, working medium overheat
The overheat gaseous working medium of the low temperature side outlet of device 21 enters the expansion work of prime mover 24, and working medium condenser 26 is sent into the exhaust of prime mover 24
Heat release is condensed, is condensed into after liquid refrigerant and is stored in working medium storage bin 27, the liquid refrigerant in working medium storage bin 27 passes through working medium
Booster 28 is sent into working medium preheater 22 after boosting, the saturated liquid working medium that working medium preheater 22 exports enters working medium evaporator 11
Low temperature side endothermic gasification, complete power cycle power generation process；The GEOTHERMAL WATER that producing well 7 exports purifies by underground heat water treatment facilities
The high temperature side of working medium evaporator 11 is sent into after processing, underground heat is passed through by the high temperature side of the working medium evaporator 11 outlet GEOTHERMAL WATER of heat absorption cooling
Water-circulating pump 12 is sent into heating tube 18 in second, and the GEOTHERMAL WATER that heating tube 18 exports in second enters back into heating tube 3 in first, the
The GEOTHERMAL WATER that heating tube 3 exports in one enters inverted well 8, and the GEOTHERMAL WATER in inverted well 8, which is absorbed after underground heat stores up 9 heat, to be entered
Producing well 7, complete GEOTHERMAL WATER circulation heat absorption, exothermic process；Biomass 1 enters acidification hydrolization tank 2 and carries out sour cyclizing hydrolysis, acidifying water
The organic acid solved in tank 2 is sent into anaeroic digestor 16 by organic acid circulating pump 17, and the aerogenesis of anaeroic digestor 16 passes through second
Combustion gas booster 15 enters air accumulator 14, and the biogas slurry of anaeroic digestor 16 is sent into acidification hydrolization tank 2 by acid cycle pump 29；Acid
The biogas residue changed in hydrolytic decomposition pot 2 is sent into biogas residue fermentation tank 5 by biogas residue circulating pump 4, and the first outlet of biogas residue fermentation tank 5 output natural pond is fertile,
The aerogenesis of the second outlet of biogas residue fermentation tank 5 is sent into air accumulator 14, the biology that air accumulator 14 exports by the first combustion gas booster 13
Matter combustion gas, which enters in the gas burner 20 of gas fired-boiler 23 to burn, produces biomass flue gas.
Described anaeroic digestor filler module 19 is the attachment of anaerobic bacteria flora in anaeroic digestor 16, and it is upper and lower, preceding
Afterwards, six faces of left and right are hollow out, and organic acid is bottom-up to flow through porous particle support 33 in anaeroic digestor filler module 19, more
Hole particle support 33 is in cross arrangement, is embedded with porous particle 34 on porous particle support 33, is attached to the surface of porous particle 34
Anaerobic bacteria flora fully contacts with organic acid, draws the nutrient output biological fuel gas of organic acid, and the particle diameter of porous particle 34 is 5-
10mm, spacing 2-5mm, organic acid can flow freely in gap, strengthen organic acid Convective Heat Transfer, complete aerogenesis, change
The strengthening process of heat.
Described underground heat water treatment facilities 10 is underground heat water purifying means, and the GEOTHERMAL WATER that geothermal well 7 exports enters air water
Separator 41, the gas of the first outlet of moisture trap 41 enter the desulfurization process of biological desulphurization tower 42, and biological desulphurization tower 42 exports
Purification gas 43 empty, the GEOTHERMAL WATER of the second outlet of moisture trap 41, which enters spiral-flow type desanding device 45 and carries out GEOTHERMAL WATER, to be removed
Sand, spiral-flow type desanding device 45 export the GEOTHERMAL WATER after desanding and enter the progress iron removaling of manganese sand tramp iron separator 46, and manganese sand tramp iron separator 46 exports
GEOTHERMAL WATER adsorption tanks 48 are sent into by booster water pump 47, the calcium ions and magnesium ions adsorbent 49 in adsorption tanks 48 adsorbs GEOTHERMAL WATER calcium and magnesium
Ion, the GEOTHERMAL WATER that adsorption tanks 48 export enter the high temperature side of working medium evaporator 11, complete underground heat water treatment procedure.
Middle the low temperature underground heat and biological fuel gas combined generating system of the present invention, with low-boiling point material, such as ammonia, carbon dioxide
It is working medium with organic working medium etc., low temperature underground heat and biological fuel gas improve the initial conditions of power cycle prime mover during joint utilizes,
Again to heat anaerobic digestion process by the GEOTHERMAL WATER after power circulating cooling and improve factor of created gase, such surmountable shortcoming is such as
Under：1. middle low temperature system for geothermal production of electricity working medium enthalpy drop is too small, the thermal efficiency is very low；2. under the conditions of low ambient temperature anaerobic digester system without
Method is run, and anaerobic digester system factor of created gase is low under normal temperature condition；3. biomass such as stalk etc. is without Processes For Effective Conversion, discharged in burning
Dense smoke, atmosphere pollution are serious.Middle low temperature underground heat, biological fuel gas joint energy supply, had both improved power cycle working medium initial conditions, had carried
High energy utilization rate, and the substantial amounts of biomass of on-site elimination, reduce environmental pollution.
Middle the low temperature underground heat and biological fuel gas combined generating system of the present invention, cryogenically energy heats gasification is low in
Boiling point working medium, the heating of recharge GEOTHERMAL WATER improve its factor of created gase, anaerobic digestion system using biomass as the anaerobic digester system of raw material
Substance combustible gas produced by system burnt in gas fired-boiler caused by high-temperature flue gas cross hot gaseous low boiling working fluid.Working medium evaporator and
Heating tube is integral according to the geothermal energy temperature range concatenation coupling that it is utilized in anaerobic digester system, and realizes underground heat hydro-thermal
The cascade utilization of amount, improve the utilization rate of geothermal energy；Anaerobic digester system is heated using GEOTHERMAL WATER, and hi-temp hi-effective production can be achieved
Gas, improve anaerobic digester system factor of created gase；Substance combustible gas produced by anaerobic digester system can improve prime mover initial conditions, increase
Prime mover group enthalpy drop, improve generating efficiency.
The working medium condenser 26 of the present invention includes direct water supply water-cooled surfaces formula condenser, wet cooling tower surface-type condensing
Device, direct air cooled condenser, surface-type indirect air cooling condenser, hybrid indirect air cooling condenser, can according in low temperature underground heat
With number, the high low factor of ambient air temperature of the factory site environment residing for biological fuel gas combined generating system, including water resource,
Factory site can use direct water supply water-cooled surfaces formula condenser by the sea, and wet cooling tower surface-type can be used in the more water areas in inland
Condenser, direct air cooled condenser, surface-type indirect air cooling condenser and hybrid sky indirectly can be used in the few water area of water shortage
Cold condenser, suit measures to local conditions using different prime mover exhaust cooling technologies.
The anaeroic digestor filler module 19 of the present invention is a kind of anaerobic bacteria attachment integrated equipment, first, porous particle
34 have rough surface, are advantageous to anaerobic bacteria being fixed on porous granulated carrier, improve anaerobic bacteria adhesive rate；Secondly, it is porous
Particle support 33 is staggered, and its outstanding advantage is that the anaerobic bacteria for solidification provides wide breeding space, can make organic acid
Exchange is fully contacted with anaerobic bacteria, anaerobic bacteria flora can keep good activity, improve the proliferative speed and reproductive number of anaerobic bacteria；
Finally, porous particle 34 is embedded according to fixed interval (FI) and arranged, anaerobic bacteria flora keeps certain space, will not adhesion it is agglomerating, maintain
Anaerobic bacteria flora specific surface area maximizes, and increases anaerobic bacteria quantity in unit volume, strengthens organic acid disturbance, strengthens pair of organic acid
Spread matter, heat transfer process, maintain in whole anaeroic digestor the stabilization of diverse location organic acid temperature with uniformly.
The underground heat water treatment facilities 10 of the present invention is a set of underground heat water correction plant, and moisture trap 41 isolates hydrogen sulfide
Gas, the corrosion of the removal of hydrogen sulfide pipeline such as hot water conveying pipe, working medium evaporator, interior heating tube over the ground；Spiral-flow type desanding device 45
Remove GEOTHERMAL WATER and contain sand, prevent gravel deposits at GEOTHERMAL WATER conveyance conduit valves and fittings from causing to block, jeopardize geothermal system
System safe operation；Manganese sand tramp iron separator 46 goes middle low temperature to remove iron excessive in GEOTHERMAL WATER, prevents GEOTHERMAL WATER delivery pipe from producing deposition of iron
Thing is accumulated, and causes line clogging；Calcium ions and magnesium ions adsorbent 49 in adsorption tanks 48 can effectively adsorb the calcium ions and magnesium ions in GEOTHERMAL WATER,
Prevent the magnesium ion and fouling is separated out in working medium evaporator, heating tube, reduce heat transfer property.
Middle low temperature underground heat and biological fuel gas the combined generating system cost of electricity-generating computational methods of the present invention, according to system knot
Structure characteristic, is broadly divided into underground heat evaporation working medium part, and biomass anaerobic digestion aerogenesis crosses hot working fluid part and generating set
Environment division.When middle low temperature geothermal source is more stable, working medium overtemperature and associating for system cost of electricity-generating are most close, performance
For：(1) working medium overtemperature is higher, and the biological fuel gas needed for system is more, and then anaerobic digester system scale is bigger, initially
Investment is bigger；(2) working medium overtemperature is higher, and system generator pool-size is bigger, and generator set device initial outlay is higher；
(3) working medium overtemperature is higher, and biological fuel gas is more needed for system, it is meant that required biomass material is more, then system is fired
Expect that cost is higher；(4) working medium overtemperature is higher, and the year the accumulative total of generating electricity of system is bigger, and finally, system cost of electricity-generating is the above
The overall merit of many influence factors compares.
Middle the low temperature underground heat and biological fuel gas combined generating system of the present invention, once used ammonia to be adopted for power cycle working medium
With 150 DEG C of GEOTHERMAL WATERs be ammonia working medium gasification thermal source, 90 DEG C, pressure 5.1Mpa of ammonia gasification temperature, prime mover exhaust cooling system
15 DEG C of cooling water temperature is designed, 16 DEG C of initial temperature differences, then can be calculated middle low temperature underground heat and biomass under the different working medium degrees of superheat
Gas Combined electricity generation system thermal efficiency of cycle changes as shown in figure 4, gross output changes such as Fig. 5 institutes with energy-photoelectric transformation efficiency
Show, year the accumulative total of generating electricity and cost of electricity-generating variation tendency it is as shown in Figure 6.When working medium by overheat 0 DEG C increase to overheat 120 DEG C, its
Year the accumulative total of generating electricity can be by 82.5 × 106KWh increases to 342.1 × 106KWh, cost of electricity-generating are then reduced to by 0.1055 $/kWh
0.0754 $/kWh, year the accumulative total of generating electricity improve 314.7%, cost of electricity-generating reduces 28.5%, so as to be greatly improved
The heat-economy of middle low temperature underground heat and biological fuel gas combined generating system.
Claims (4)
1. a kind of middle low temperature underground heat and biological fuel gas combined generating system, it is characterised in that：It includes working medium evaporator（11）
Low temperature side gaseous working medium output end and gas fired-boiler（23）Working medium superheater（21）Low temperature side input connects, gas fired-boiler
（23）Working medium superheater（21）Low temperature side output end and prime mover（24）Input connects, prime mover（24）With generator（25）
Connection, prime mover（24）Output end and working medium condenser（26）Input connects, working medium condenser（26）Output end is stored up with working medium
Deposit case（27）Input connects, working medium storage bin（27）Output end passes through working medium booster（28）With gas fired-boiler（23）Working medium
Preheater（22）Low temperature side input connects, gas fired-boiler（23）Working medium preheater（22）Low temperature side output end is evaporated with working medium
Device（11）Low temperature side liquid refrigerant input connects；Producing well（7）Output end and underground heat water treatment facilities（10）Input connects,
Underground heat water treatment facilities（10）Output end and working medium evaporator（11）High temperature side underground heat water inlet connects, working medium evaporator（11）It is high
Warm side underground heat water out passes through underground heat water-circulating pump（12）With second in heating tube（18）Input connects, heating tube in second
（18）Heating tube in output end and first（3）Input connects, heating tube in first（3）Output end and inverted well（8）Input
Connection, inverted well（8）Output end is stored up by underground heat（9）With producing well（7）Input connects；Biomass（1）With acidification hydrolization
Tank（2）First input end connects, acidification hydrolization tank（2）First output end passes through biogas residue circulating pump（4）With biogas residue fermentation tank（5）It is defeated
Enter end connection, biogas residue fermentation tank（5）First output end and natural pond fertilizer（6）Connection, biogas residue fermentation tank（5）Second output end passes through first
Combustion gas booster（13）With air accumulator（14）First input end connects；Acidification hydrolization tank（2）Second output end is followed by organic acid
Ring pump（17）With anaeroic digestor（16）Input connects, anaeroic digestor（16）First output end passes through acid cycle pump（29）
With acidification hydrolization tank（2）Second input connects, anaeroic digestor（16）Second output end passes through the second combustion gas booster（15）
With air accumulator（14）Second input connects, air accumulator（14）Output end and gas fired-boiler（23）Burner（20）Connection；Detest
Oxygen digester filler module（19）It is placed in anaeroic digestor（16）It is interior.
2. a kind of middle low temperature underground heat according to claim 1 and biological fuel gas combined generating system, it is characterised in that：Institute
State working medium condenser（26）Including direct water supply water-cooled surfaces formula condenser, wet cooling tower surface condenser, Direct Air-Cooled
Condenser, surface-type indirect air cooling condenser, hybrid indirect air cooling condenser.
3. a kind of middle low temperature underground heat according to claim 1 and biological fuel gas combined generating system, it is characterised in that：Institute
State anaeroic digestor filler module（19）Including tube sheet（31）, frame support（30）With porous particle branch pipe（33）, tube sheet（31）
On be drilled with the plate hole of cross arrangement（32）, plate hole（32）Interior insertion porous particle support（33）, porous particle support（33）Under it is embedding
There is porous particle（34）, tube sheet（31）Corner passes through frame support（30）Upper and lower, front and rear penetrating anaeroic digestor is combined into fill out
Expect module（19）, porous particle（34）Particle diameter is 5-10mm, porous particle（34）Spacing is 2-5mm, porous particle support（33）
Below diameter 0.5mm.
4. a kind of middle low temperature underground heat according to claim 1 and biological fuel gas combined generating system, it is characterised in that：Institute
State underground heat water treatment facilities（10）Including moisture trap（41）First output end and biological desulphurization tower（42）Input connects, raw
Thing desulfurizing tower（42）Output end and purification gas（43）Delivery end connects；Moisture trap（41）Second output end is removed with spiral-flow type
Sand device（45）Input connects, spiral-flow type desanding device（45）Output end and manganese sand tramp iron separator（46）Input connects, manganese sand iron removaling
Device（46）Output end passes through booster water pump（47）With adsorption tanks（48）Input connects, in adsorption tanks（48）It is interior to be provided with calcium ions and magnesium ions
Adsorbent（49）.
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| CN106931423A (en) * | 2017-04-24 | 2017-07-07 | 刘崇江 | Boiler replenishing water is preheated and reparation technology system |
| CN107557293A (en) * | 2017-10-07 | 2018-01-09 | 东北电力大学 | Electromagnetism reinforced anaerobic digests gas production system and its regulation and control method |
| CN110219709A (en) * | 2019-06-01 | 2019-09-10 | 陈明晖 | A kind of engine |
| CN111370071B (en) * | 2020-03-03 | 2023-03-28 | 重庆市环卫集团有限公司 | Method for recycling anaerobic biogas slurry of kitchen waste |
| CN111574265B (en) * | 2020-05-28 | 2021-09-10 | 合肥净龙环保科技有限公司 | Agricultural waste straw fermenting device based on shallow geothermal energy supply |
| CN112459983B (en) * | 2020-11-24 | 2022-03-01 | 清华四川能源互联网研究院 | Comprehensive energy supply system and method containing compressed air energy storage |
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| CN203925627U (en) * | 2014-07-03 | 2014-11-05 | 上海脉慧能源科技有限公司 | Low temperature organic Rankine cycle waste heat generating system |
| JP2014227995A (en) * | 2013-05-24 | 2014-12-08 | 畑中 武史 | Geothermal power generation method and device |
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| JP2014227995A (en) * | 2013-05-24 | 2014-12-08 | 畑中 武史 | Geothermal power generation method and device |
| CN203925627U (en) * | 2014-07-03 | 2014-11-05 | 上海脉慧能源科技有限公司 | Low temperature organic Rankine cycle waste heat generating system |
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