CN205243745U - Natural gas distributed energy system of coupling solar energy - Google Patents

Natural gas distributed energy system of coupling solar energy Download PDF

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Publication number
CN205243745U
CN205243745U CN201521108664.6U CN201521108664U CN205243745U CN 205243745 U CN205243745 U CN 205243745U CN 201521108664 U CN201521108664 U CN 201521108664U CN 205243745 U CN205243745 U CN 205243745U
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hot water
gas
natural gas
heat
heater
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胡孟起
肖俊峰
张宇博
朱立春
高松
李园园
李兆瑜
连小龙
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Xian Thermal Power Research Institute Co Ltd
Huaneng Power International Inc
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Xian Thermal Power Research Institute Co Ltd
Huaneng Power International Inc
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/46Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines

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  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The utility model provides a natural gas distributed energy system of coupling solar energy, includes: gas turbine power generation unit, waste heat utilization equipment, solar energy collection system etc. Wherein, the natural gas gets into the combustion chamber in order behind two -stage natural gas heater, the air gets into the combustion chamber through the compressor after, air and the natural gas laggard income gas turbine that burns in the combustion chamber, the gas turbine exhaust gets into waste heat utilization equipment, and waste heat utilization equipment's exhaust gets into the atmosphere, hot water that the solar energy collection system produced is as the heat source of first order natural gas heater, and the hot water of waste heat utilization equipment production is as the heat source of second level natural gas heater, the natural gas has priority and heats in the primary heater to rated temperature, and the insufficient section heats in the heater of the second level, hot water user's hot water demand priority is satisfied by waste heat utilization equipment, and the insufficient section is provided by the solar energy collection system, steam user's steam demand is produced and is satisfied by waste heat utilization equipment.

Description

A kind of NG Distributed Energy System of coupled solar
Technical field:
The utility model belongs to energy utilization technology field, and the natural gas that is specifically related to a kind of coupled solar dividesCloth formula energy resource system.
Background technology:
Distributed energy resource system is the energy supplying system for the centralized energy-provision way of tradition, distributed energyThe direct user oriented of origin system, produces and supplying energy on the spot by user's demand, is to have several functions,The power conversion that can meet multiple target is utilized system. Compared with the centralized energy-provision way of tradition, distributed energySource approaches user's side, does not need to build large electrical network, large heat supply network, has avoided the remote conveying of the energy, can saveEconomize construction investment, and reduced line loss and operating cost. Distributed energy can have distributed photovoltaic,Distributed wind energy, NG Distributed Energy System (also claiming natural gas cold, heat and power triple supply system) etc. are multipleForm. NG Distributed Energy System by gas turbine, waste heat boiler, steam turbine, absorption heat pump andThe equipment compositions such as refrigeration machine, it has both the various energy resources supplying functionals such as generating, heat supply, refrigeration, can be effectiveRealize the cascade utilization of the energy, reach the comprehensive utilization of energy rate that exceedes 70%. Compare other distributed energiesSystem, NG Distributed Energy System has energy stable output and various advantage, is particularly suitable for toolThere are industrial park and the groups of building of various energy resources demand (electric power, hot water, cold water, steam etc.).
Gas turbine is the key equipment of NG Distributed Energy System, is generally and meets gas turbine to skySo requirement of gas fuel quality can arrange voltage regulating station and preposition between natural gas outside network and gas turbinePretreatment module. Voltage regulating station mainly carries out coarse filtration and pressure regulation to the natural gas that enters factory, preposition pretreatment moduleMainly comprise the filtration of natural gas essence and heating unit. Natural gas temperature is the key parameter of fuel quality, impactThe safety and efficiently operation of NG Distributed Energy System, mainly contains two reasons: the one, due to joule-Thompson effect, natural gas can be lowered the temperature in voltage regulating station step-down process, easily produces condensation water or makes hydrocarbonizeCompound liquefaction, can cause damage or pipeline external surface is frozen conveying equipment, and therefore gas turbine manufacturer is equalCan require the fuel inlet temperature of unit within the specific limits, and the specific requirement of different type of machines is different,For example GEPG6581B unit requires fuel inlet temperature at least to exceed 28 DEG C of gas dew points, but the highest temperatureDegree is no more than 125 DEG C, and GEPG9171E requires fuel inlet temperature at least to exceed 28 DEG C of gas dew points, butMaximum temperature is no more than 70 DEG C; The 2nd, the thermal efficiency of gas turbine and the dynamic characteristic of combustion chamber are subject to natural temperatureDegree impact is very large, and therefore natural gas must accurately be controlled temperature before entering combustion chamber, and for example GE adoptsThe 9F type (typical in 9F.03,9F.05 etc.) of DLN2.0+ combustion system, it required before set grid-connectionAdopt electric heater to carry out heated by natural gas, when dropping into natural gas performance heater after set grid-connection, finally makeNatural gas temperature reaches 185 DEG C of specified operational factors.
Existing heated by natural gas technology mainly adopts electrical heating, heating water bath, extracted steam from turbine heating, waste heatThe modes such as boiler export hot water heating. These several mode of heatings are the low use of high energy, finally all can consume Gao PinThe fossil energy of position, has reduced the using energy source of NG Distributed Energy System or association circulating power generation systemRate.
Solar energy is a kind of clean, free of contamination regenerative resource, and its exploitation are known as by countries in the worldThe important component part of energy strategy. Solar thermal utilization is one of major way of solar energy utilization. According toThe temperature of working medium, solar thermal utilization can be divided into low temperature, middle temperature, high temperature three types. Due to solar radiationHave dispersed strong, the feature that energy-flux density is low, applicable output obtains middle low-temperature heat source, therefore in, low temperatureHeat utilization is that most important field is applied in current solar energy low cost, scale. Solar energy heating technology is tooIn sun energy, the one of low-grade utility technology, mainly comprise two kinds of modes of vacuum tube thermal-arrest and flat heat collecting,Its technology maturation and energy-saving effect are remarkable, have now been widely used in China resident hot water supply field. But due toThe feature of solar energy existence self poor continuity, is difficult to ensure reliable thermal source output, if supply for regionHeat, hold over system will be very huge, and because exported thermal source grade is lower, be difficult to obtain cheaplyEfficient utilization.
Utility model content:
The purpose of this utility model is to overcome the deficiency that prior art exists, and a kind of coupled solar is providedNG Distributed Energy System. This system taking can cascade utilization as principle, produce by solar thermal collectorLow-temperature water heating in life, the natural gas that heating gas turbine is required, makes low grade heat energy enter high temperature Bretton and followsRing, has improved the application energy level of middle low-temperature solar energy, and met user's lateral terminal together with residual heat using deviceThermic load demand, reaches the mutual supplement with each other's advantages of regenerative resource and the Distribution of Natural formula energy, obtains too stableThe heat utilization of sun energy, has reduced the consumption of fossil energy, has improved the economy of distributed energy resource system.
For achieving the above object, the utility model is realized by the following technical solutions:
A NG Distributed Energy System for coupled solar, comprises Gas Turbine Generating Units, waste heatUse device, solar thermal collection system, heat storage water tank, hot water user, steam user and heated by natural gasDevice; Wherein,
In Gas Turbine Generating Units, be provided with gas inlet, air intake and exhaust outlet, natural gas addsOn hot device, be provided with natural gas gateway, the outlet of gas heater is connected to Gas Turbine Generating UnitsGas inlet, the exhaust outlet of Gas Turbine Generating Units is connected to the exhaust entrance of residual heat using device, more thanIn heat utilization device, be provided with exhaust emptying outlet;
Between solar thermal collection system and heat storage water tank, form hot water cyclesystem, heat storage water tank and natural gas addBetween hot device, all form hot water cyclesystem between heat storage water tank and hot water user; Hot water user and waste heat profitWith forming hot water cyclesystem between device, between residual heat using device and gas heater, form hot water and followLoop systems, and in residual heat using device, be provided with steam (vapor) outlet, this steam (vapor) outlet is connected to steam user.
The utility model further improves and is, Gas Turbine Generating Units comprise the compressor that connects successively,Combustion chamber, combustion gas turbine and generator, wherein, be provided with air intake on compressor, on combustion chamber, arrangeHave gas inlet, on combustion gas turbine, be provided with exhaust outlet, and combustion gas turbine is used for driving generator generating.
The utility model further improves and is, gas heater comprises the right gas of the first order connecting successivelyHeater and second level gas heater, form hot water between the right hot-air heater of heat storage water tank and the first order and followLoop systems, forms hot water cyclesystem between residual heat using device and second level gas heater.
The utility model further improves and is, residual heat using device is waste heat boiler or waste heat boiler and vapourThe combination of turbine generator group.
The utility model further improves and is, solar thermal collection system adopts vacuum tube or the plate sunCan collecting system.
The utility model further improves and is, the hot water forming between heat storage water tank and gas heaterOn circulatory system pipeline, be provided with the first valve, the hot water circuit all forming between heat storage water tank and hot water userOn system pipeline, be provided with the second valve and the 3rd valve, between hot water user and residual heat using device, formOn hot water cyclesystem pipeline, be provided with the 4th valve and the 5th valve, residual heat using device and heated by natural gasOn the hot water cyclesystem pipeline forming between device, be provided with the 6th valve.
With respect to prior art, the beneficial effects of the utility model are:
The distributed energy supply mode that the utility model adopts solar energy, natural gas to be coupled, utilizes natural gas to divideThe feature of cloth formula energy stable output, makes solar energy obtain stable utilization, has solved independent solar energy energy supply and has beenSystem continuation is poor, the shortcoming that hold over system is huge.
The utility model is compared independent NG Distributed Energy System, is obtaining identical electricity, heat (cold)In the situation of output, with regenerative resource heat supply (cold), Substitute For Partial fossil energy consumes, and reaches energy-conservationThe beneficial effect reducing discharging.
The utility model adopts solar energy heating natural gas, can reduce heated by natural gas unit fossil energyConsume, as adopted GEPG6581B gas turbine and two distributed energy of domain type of pressing non-reheating steam systemOrigin system, it is that heating agent adds natural gas from 25 DEG C that raw natural gas heating unit adopts low-pressure coal saver outlet hot waterHeat is to 125 DEG C, and when heating unit changes while being thermal source by solar energy, system generating efficiency can improve approximately 0.1 hundredBranch, calculates by annual utilization hours 5000, and year can be saved natural gas approximately 70,000 sides.
The low grade heat energy that the utility model obtains solar thermal collection system is preferentially inputted the high temperature of gas turbineBrayton cycle generating, in having improved, the application energy level of low-temperature solar energy, realized low temperature heat energy across levelUtilize, improved the generating efficiency of distributed energy resource system, as adopted GEPG6581B gas turbine and twoPress the domain type distributed energy resource system of non-reheating steam system, can utilize solar energy that natural gas is added from 25 DEG CHeat, to 125 DEG C, is compared natural gas temperature and is the operating mode of 25 DEG C, and after heated by natural gas, system generating efficiency canImprove 0.2 percentage point.
In sum, the energy-provision way that the utility model adopts solar energy and natural gas to be coupled, utilizes naturalThe feature of gas distributed energy stable output, makes solar energy obtain stable utilization, has solved independent solar energy and has suppliedThe shortcoming that energy system continuation is poor, hold over system is huge; Compare independent NG Distributed Energy System,In the case of obtaining identical electricity, heat (cold) output, with regenerative resource heat supply (cold), substitutePart fossil energy consumes; Taking can cascade utilization as principle, in making, low-temperature solar energy obtains across level profitWith, by solar energy heating natural gas, reduce the energy consumption of heated by natural gas unit, improve distributed energyThe generating efficiency of origin system; The utility model has been realized the mutual supplement with each other's advantages of regenerative resource and fossil energy, toolThere is energy-conservation and double benefit environmental protection.
Brief description of the drawings:
Fig. 1 is the structured flowchart of the NG Distributed Energy System of a kind of coupled solar of the utility model.
In figure: 1, compressor; 2, combustion chamber; 3, combustion gas turbine; 4, residual heat using device; 5, the sunEnergy collecting system; 6, heat storage water tank; 7, hot water user; 8, steam user; 9, first order natural gas addsHot device; 10, second level gas heater; 11, generator; 101~106, the first valve to the six valves.
Detailed description of the invention:
Below in conjunction with drawings and Examples, the utility model is described in detail:
As shown in Figure 1, the NG Distributed Energy System of a kind of coupled solar described in the utility model,Comprise: Gas Turbine Generating Units, residual heat using device 4, solar thermal collection system 5, heat storage water tank 6,Hot water user 7, steam user 8, first order gas heater 9, second level gas heater 10 andValve 101-106, Gas Turbine Generating Units comprises that the compressor 1, combustion chamber 2, the combustion gas that connect are in turn saturatingFlat 3 and generator 11; Wherein, natural gas adds through first order gas heater 9 and second level natural gasAfter hot device 10, enter combustion chamber 2; Air enters combustion chamber 2 after compressor 1, and air and natural gas existThe interior burning in combustion chamber 2 laggard enter combustion gas turbine 3; Combustion gas turbine 3 exhausts enter residual heat using device 4, waste heatThe exhaust of use device 4 enters atmosphere; Solar thermal collection system 5 produces hot water and enters heat storage water tank 6, heat accumulationWater tank 6 is connected with first order gas heater 9. Described hot water user 7 is at least by the 4th valve 104Be connected with residual heat using device 4 with the 5th valve 105; Described hot water user 7 is at least by the second valve 102Be connected with heat storage water tank 6 with the 3rd valve 103; Described steam user 8 is connected with residual heat using device 4;Described second level gas heater 10 is at least connected with residual heat using device 4 by the 6th valve 106.
Described residual heat using device 4 can be separately waste heat boiler or waste heat boiler and steam turbine power generation unitCombination.
Described first order gas heater 9 taking solar thermal collector produce hot water as thermal source, described secondLevel gas heater 10 is taking hot water that residual heat using device was produced as thermal source. Natural gas is preferentially describedIn one-level gas heater 9, be heated to rated temperature, the hot water that described solar thermal collection system 5 produces is notWhen foot, specified by regulating the 6th valve 106 that natural gas is heated in second level gas heater 10Temperature.
Described solar thermal collection system 5 adopts vacuum tube or plate type solar thermal-arrest mode.
Solar energy has the good but feature that continuation is poor of reproducibility, and natural gas has that reproducibility is poor but continuation goodFeature, the utility model has been realized the mutual supplement with each other's advantages of regenerative resource and fossil energy, in having improved, lowThe application energy level of temperature solar, makes solar energy obtain stable and efficient utilization, has reduced heated by natural gas unitEnergy consumption, has improved the thermal efficiency of NG Distributed Energy System, has energy-conservation and double benefit environmental protection.
The course of work of the present utility model is as follows:
As shown in Figure 1, air forms pressure-air and enters combustion chamber 2 after compressor 1, fires with natural gasThe rear generation of burning high temperature and high pressure flue gas enters combustion gas turbine 3 and does work, and combustion gas turbine 3 drives generator 11 to generate electricity. WithAfter, flue gas enters residual heat using device 4 and carries out UTILIZATION OF VESIDUAL HEAT IN, after cooling, enters atmosphere.
Water, at the interior absorption fume afterheat of residual heat using device 4, produces hot water by the 4th valve 104 and the 6th valveDoor 106 supplying hot water user 7 and second level gas heater 10 respectively, and produce steam supply steam useFamily 8; Hot water is interior after heat exchange is cooling hot water user 7 and second level gas heater 10 respectively, is back toResidual heat using device 4.
Water is at the interior absorption solar thermal energy of solar thermal collection system 5, and in formation, low-temperature water heating enters heat storage water tank 6,After the interior hot water of heat storage water tank 6 reaches uniform temperature, be divided into two-way, lead up to the first valve 101 to first order skySo hot-air heater 9 provides heat source water, and second valve 102 of separately leading up to provides heat source water to hot water user 7;Hot water is interior after heat exchange is cooling at first order gas heater 9 and hot water user 7, is back to heat storage water tank6。
Natural gas via enters first order gas heater 9 after crossing voltage regulating station and fine filter, adds at natural gasThe heat energy of low-temperature water heating during the interior absorption solar thermal collection system 5 of hot device 9 produces enters the second level after heatingGas heater 10, the hot water thermal producing in the interior absorption residual heat using device 4 of gas heater 10Can, enter combustion chamber 2 after being heated to rated temperature.
Being ensured by two-way thermal source with heat demand of heated by natural gas, comes from residual heat using device 4, anotherRoad, from heat storage water tank 6, regulates respectively two-way thermal source by the aperture of the first valve 101 and the 6th valve 106Flow; Operating principle is preferential first valve 101 of opening, to utilize the heat source water in heat storage water tank 6, deficiencyPart meets by opening the 6th valve 106.
Hot water user 7 is ensured by two-way thermal source with heat demand, comes from residual heat using device 4, and another roadFrom heat storage water tank 6, regulate respectively two-way heat source stream by the aperture of the 4th valve 104 and the second valve 102Amount; Operating principle is preferential the 4th valve 104 of opening, with the hot water that utilizes residual heat using device 4 to produce, noFoot portions meets by opening the second valve 102.

Claims (6)

1. a NG Distributed Energy System for coupled solar, is characterized in that, comprises gas turbineGenerating set, residual heat using device (4), solar thermal collection system (5), heat storage water tank (6), hot water are usedFamily (7), steam user (8) and gas heater; Wherein,
In Gas Turbine Generating Units, be provided with gas inlet, air intake and exhaust outlet, natural gas addsOn hot device, be provided with natural gas gateway, the outlet of gas heater is connected to Gas Turbine Generating UnitsGas inlet, the exhaust outlet of Gas Turbine Generating Units is connected to the exhaust entrance of residual heat using device (4),Residual heat using device is provided with exhaust emptying outlet on (4);
Between solar thermal collection system (5) and heat storage water tank (6), form hot water cyclesystem, heat storage water tank(6) and between gas heater, between heat storage water tank (6) and hot water user (7), all form hot water and followLoop systems; Between hot water user (7) and residual heat using device (4), form hot water cyclesystem, waste heat profitWith forming hot water cyclesystem between device (4) and gas heater, and in residual heat using device (4)Be provided with steam (vapor) outlet, this steam (vapor) outlet is connected to steam user (8).
2. the NG Distributed Energy System of a kind of coupled solar according to claim 1, its spyLevy and be, Gas Turbine Generating Units comprises that the compressor (1), combustion chamber (2), the combustion gas that connect are successively saturatingFlat (3) and generator (11), wherein, compressor is provided with air intake on (1), combustion chamber (2)On be provided with gas inlet, combustion gas turbine is provided with exhaust outlet on (3), and combustion gas turbine (3) forDrive generator (11) generating.
3. the NG Distributed Energy System of a kind of coupled solar according to claim 1, its spyLevy and be, gas heater comprises the right hot-air heater of the first order (9) and the second level natural gas that connect successivelyHeater (10), forms hot water cyclesystem between heat storage water tank (6) and the right hot-air heater of the first order (9),Between residual heat using device (4) and second level gas heater (10), form hot water cyclesystem.
4. the NG Distributed Energy System of a kind of coupled solar according to claim 1, its spyLevy and be, residual heat using device (4) is the combination of waste heat boiler or waste heat boiler and steam turbine power generation unit.
5. the NG Distributed Energy System of a kind of coupled solar according to claim 1, its spyLevy and be, solar thermal collection system (5) adopts vacuum tube or plate type solar collecting system.
6. the NG Distributed Energy System of a kind of coupled solar according to claim 1, its spyLevy and be, on the hot water cyclesystem pipeline forming between heat storage water tank (6) and gas heater, be provided withThe first valve (101), the hot water cyclesystem pipe of composition between heat storage water tank (6) and hot water user (7)On road, be provided with the second valve (102) and the 3rd valve (103), hot water user (7) and UTILIZATION OF VESIDUAL HEAT IN dressPut on the hot water cyclesystem pipeline forming between (4) and be provided with the 4th valve (104) and the 5th valve (105),On the hot water cyclesystem pipeline forming between residual heat using device (4) and gas heater, be provided with the 6thValve (106).
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105508158A (en) * 2015-12-28 2016-04-20 华能国际电力股份有限公司 Solar energy-coupled natural gas distributed energy system
CN108194201A (en) * 2017-12-06 2018-06-22 浙江中控太阳能技术有限公司 The afterheat utilizing system and its operation method of a kind of gas-turbine electric power plant
CN108591994A (en) * 2018-03-27 2018-09-28 中国能源建设集团广东省电力设计研究院有限公司 Starting trouble unit and Combined cycle gas-steam turbine unit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105508158A (en) * 2015-12-28 2016-04-20 华能国际电力股份有限公司 Solar energy-coupled natural gas distributed energy system
CN105508158B (en) * 2015-12-28 2018-07-24 华能国际电力股份有限公司 A kind of NG Distributed Energy System of coupled solar
CN108194201A (en) * 2017-12-06 2018-06-22 浙江中控太阳能技术有限公司 The afterheat utilizing system and its operation method of a kind of gas-turbine electric power plant
CN108194201B (en) * 2017-12-06 2020-03-31 浙江中控太阳能技术有限公司 Waste heat utilization system of gas turbine power plant and operation method thereof
CN108591994A (en) * 2018-03-27 2018-09-28 中国能源建设集团广东省电力设计研究院有限公司 Starting trouble unit and Combined cycle gas-steam turbine unit

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