CN102191957B - Combined cycle and combined heat and power (CHP) equipment and process - Google Patents
Combined cycle and combined heat and power (CHP) equipment and process Download PDFInfo
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- CN102191957B CN102191957B CN201110112807.0A CN201110112807A CN102191957B CN 102191957 B CN102191957 B CN 102191957B CN 201110112807 A CN201110112807 A CN 201110112807A CN 102191957 B CN102191957 B CN 102191957B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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Abstract
The invention discloses a combined cycle and combined heat and power (CHP) equipment and process. The equipment is provided with a plurality of branch systems comprising gas turbines and waste heat boilers, wherein the waste heat boilers utilize high-temperature flue gas exhausted by the corresponding gas turbines as heat exchange heat sources so as to provide required steam for steam turbines and heat users; and at least one of the branch systems is an adjustable branch system which can adjust and distribute the flow of the waste heat boilers therein, which enters the steam turbines and heat supply pipe networks, so that the generated heat and power can meet the practical heat and power demands. By using coke oven gas as the fuel, the invention realizes good heat energy matching with the chemical production process and the like, and has the advantages of more reasonable energy level matching, high overall efficiency and flexible heat and power load adjustment.
Description
Technical field
The present invention relates to, take carbonization of coal as basic cogeneration of heat and power field of energy-saving technology, relate in particular to a kind of combined cycle cogeneration equipment and technique take coke-stove gas as fuel.
Background technique
At present, technology related to the present invention mainly comprises combined-cycle technology and cogeneration of heat and power technology (CHP).State of development and the system features of technology is as follows separately for it:
Combined cycle is exactly that the brayton cycle of gas turbine (Brayton Cycle) is combined with the Rankine cycle (Rankine Cycle) of steam turbine, the Novel thermodynamic cycle of composition, the supply system that forms energy cascade utilization, reaches the higher thermal efficiency.
The thermodynamic cycle that combined cycle is got up as a kind of RECENT DEVELOPMENTS, there are a variety of arrangements: (1) steam injection (STIG) circulation: this high-temperature exhaust air that recycles gas turbine produces steam, note is to firing chamber, generate high-temperature fuel gas-vapor mixing working medium, then enter turbine expansion acting; (2) humid air turbine (HAT) circulation: the waste heat in HAT cyclic utilization system and used heat produce hot water, reusable heat water temperature means increase turbine working medium flow, relatively reduce working medium compression wasted work, and adopted the form recovery gas turbine heat extraction of backheat; (3) Abstract Pressurized fluidized bed combustion combined cycle (PFBC): the difference of PFBC and conventional coal burning system is to replace normal stove with the boiler island of PFBC, owing to adopting boiler supercharging, body of heater volume is less, therefore its combustion efficiency is higher; (4) integrated gasification combined cycle plants (IGCC): IGCC is made up of systems such as coal gasifier, purification plant (dedusting, desulfurization), Gas Turbine Generating Units, exhaust heat boiler and steam turbine generator set, is heat supply, powers, gives gas and supply the multi-generation system of chemical product.
Combined cycle is applied to industrial generation since the 1950's, at present, combined cycle has become the main development direction of thermoelectricity and relevant electricity consumption industry.Conventional combined cycle, owing to adopting the single pattern (gas turbine, an exhaust heat boiler, a steam turbine) of structure, conventionally adopting high-quality rock gas is fuel, can reach higher generating efficiency, but, aspect heat supply, do not reach the demand of flexible adjustment.
Cogeneration of heat and power (CHP) not only electrogenesis but also heat supply are the generally acknowledged power-saving technologies in countries in the world.Since 20 beginnings of the century, various countries develop in succession, particularly develop comparatively fast in developed countries such as the former Soviet Union, Denmark, Sweden, Holland, the U.S., Japan.
Cogeneration of heat and power technology has multiple arrangement, the choice and application of fuel also has larger flexibility, the major advantage of conventional cogeneration of heat and power technology is embodied in: (1) steam is not in step-down or heat supply after pressure and temperature reducing, but first generating, then with drawing gas or steam discharge meets the needs of heat supply, refrigeration, can improve energy utilization rate; (2) increase back pressure unit Rate of load condensate, increase unit generation, reduce condensation loss, reduce coal consumption; (3), according to the grade energy supply of heat energy, realized preferably the cascade utilization of heat energy.
Common cogeneration of heat and power, take steam turbine as main body, adopts sucking condensing type or back pressure type, and its available temperature range is limited, makes its energy consumption efficiency not high, and the potentiality that efficiency improves are also little, and power supply simultaneously is also restricted with the flexibility of heat supply.
Summary of the invention
The technical problem that the present invention solves is: provide a kind of combined cycle cogeneration equipment and technique take coke-stove gas as fuel, to improve or to overcome the one or more defect of prior art.
Technical solution of the present invention is: a kind of combined cycle cogeneration equipment, it is provided with multiple branch systems that comprise gas turbine and exhaust heat boiler, the high-temperature flue gas that described exhaust heat boiler utilizes corresponding gas turbine to discharge is heat exchange thermal source, to provide required steam to steam turbine and hot user, wherein, in described branch system, has one at least for adjustable branch system, regulate and distribute with the flow that exhaust heat boiler is wherein entered to steam turbine, heating network so that the heat of output, electricity coordinate mutually with actual heat, electric demand.
The present invention also proposes a kind of combined cycle cogeneration technique, it comprises multiple branch's flow processs of utilizing gas turbine and exhaust heat boiler, the high-temperature flue gas that described exhaust heat boiler utilizes corresponding gas turbine to discharge is heat exchange thermal source, to provide required steam to steam turbine and hot user, wherein, in described branch flow process, has one at least for adjustable branch flow process, regulate and distribute with the flow that exhaust heat boiler is wherein entered to steam turbine, heating network so that the heat of output, electricity coordinate mutually with actual heat, electric demand.
Preferably, described gas turbine comprises the combustion gas turbine that flue gas does work after the firing chamber of air after air compressor, coke-stove gas and compression and burning, the main shaft of combustion gas turbine is connected with electric organ main shaft the conversion that realizes mechanical energy and electric energy, output electric energy, the high-temperature flue gas of combustion gas turbine outlet simultaneously enters exhaust heat boiler, the high-temperature steam producing in each exhaust heat boiler is selected for promoting steam turbine acting or supplying with hot user's heat, steam turbine is connected with generator and exports electric energy, and the steam of steam turbine outlet simultaneously flows to hot user's heat.
Preferably, the exhaust heat boiler of described adjustable branch system is two pressure exhaust heat boilers, and the high pressure vapour of this pair of pressure exhaust heat boiler is supplied with steam turbine, and low-pressure steam is directly supplied with hot user.
The features and advantages of the invention are: the invention provides a kind of Combined-cycle Cogeneration Systems take coke-stove gas as fuel, this system comprises: adopt one of coal coke chemicals---coke-stove gas, after purified treatment as the fuel of gas turbine; The exhaust of higher temperature gas turbine enters exhaust heat boiler, by waste-heat feedwater, provides process steam; After exhaust heat boiler, arrange the steam turbine system that power is suitable; The steam producing in exhaust heat boiler, a part is the production technology heat supplies such as chemical industry, another part provides acting steam for steam turbine; Steam in steam turbine after acting continues as production technology heat supply.Combined-cycle Cogeneration Systems using coke-stove gas as fuel of the present invention, not only having realized good heat energy with production processes such as chemical industry mates, and the co-generation unit adopting is compared with traditional combined cycle and co-generation unit, energy level coupling is more reasonable, whole efficiency is high, and thermoelectricity Load Regulation is flexible.This Combined-cycle Cogeneration Systems, in the application of coke-oven plant, can meet hot wilderness demand for chemical process productive power, and flexible operation, production safety are easy to control, and energy-saving benefit is remarkable, has promotional value widely.
Accompanying drawing explanation
Fig. 1 is the mobile schematic diagram of energy matter of the combined cycle cogeneration Processes and apparatus take coke-stove gas as fuel of one embodiment of the invention.
Fig. 2 is flow process and the structural representation of an Application Example of the combined cycle cogeneration Processes and apparatus take coke-stove gas as fuel of one embodiment of the invention.
Embodiment
Actual national conditions for China take coal as main energy sources mode, the output of product-coke-stove gas of considering relevant Chemical Industry is large, take feature easily, in conjunction with thermomechanics, thermal conduction study, chemical kinetics, and the correlation theory of Fluid Science and technology, the inventor adopts combined cycle and the thermodynamic cycle mode that cogeneration of heat and power technology combines, and proposes combined cycle cogeneration Processes and apparatus of the present invention.
Combined cycle cogeneration technique of the present invention comprises multiple branch's flow processs of utilizing gas turbine and exhaust heat boiler, the high-temperature flue gas that described exhaust heat boiler utilizes corresponding gas turbine to discharge is heat exchange thermal source, to provide required steam to steam turbine and hot user, wherein, in described branch flow process, has one at least for adjustable branch flow process, regulate and distribute with the flow that exhaust heat boiler is wherein entered to steam turbine, heating network so that the heat of output, electricity coordinate mutually with actual heat, electric demand.Corresponding with this technique, combined cycle cogeneration equipment of the present invention is provided with multiple branch systems that comprise gas turbine and exhaust heat boiler, the high-temperature flue gas that described exhaust heat boiler utilizes corresponding gas turbine to discharge is heat exchange thermal source, to provide required steam to steam turbine and hot user, wherein, in described branch system, has one at least for adjustable branch system, regulate and distribute with the flow that exhaust heat boiler is wherein entered to steam turbine, heating network so that the heat of output, electricity coordinate mutually with actual heat, electric demand.
The present invention utilizes coke-stove gas to carry out Gas-steam Combined Cycle cogeneration of heat and power, that the coke-stove gas producing in industrial coke oven is effectively utilized, first it is carried out to the purification that desulfurization, washing, removal of impurities etc. are necessary, make it change into the available fuel of gas turbine, after burning, promote combustion gas turbine acting generating, again the flue gas after burning with uniform temperature is sent into exhaust heat boiler, utilize waste heat and the water of flue gas to carry out heat exchange, finally utilize the Steam Actuation steam turbine acting generating of High Temperature High Pressure.The concrete energy matter of the present invention flows as shown in Figure 1.
Combined cycle cogeneration technique of the present invention can be according to the gas turbine of many different loads of industrial actual conditions flexible configuration, exhaust heat boiler and steam turbine; Meanwhile, according to various processes with heat, electricity consumption need the hot steam of exhaust heat boiler output can be met respectively to industrial heat user or steam turbine by different proportion, realize production and the service condition of different operating modes and Various Seasonal.Further, utilize combined cycle cogeneration technique of the present invention, can configure flexibly according to the grade height of energy, and then make whole power system more reasonable to the utilization of heat energy, improve the efficiency of total system.
Preferably, adjustable branch flow process (system) adopts two pressure exhaust heat boilers, and the high pressure vapour of this pair of pressure exhaust heat boiler is supplied with steam turbine, and low-pressure steam is directly supplied with hot user.Further, in branch's flow process (system), also comprise the steaming all for heat supply of exhaust heat boiler of at least one branch flow process (system), the exhaust heat boiler of at least one branch flow process (system) all supply steam turbines that steam.
Preferably, the fuel of described each gas turbine adopts the coke-stove gas after purified treatment, carries out pressurized treatment entering before gas-turbine combustion chamber, to mate with the air pressure entering.Further, before air enters described gas turbine, also comprise air is filtered and sprays cooling.
Understand for technological scheme of the present invention being had more fully, below in conjunction with accompanying drawing and embodiment, the combined cycle cogeneration Processes and apparatus take coke-stove gas as fuel of one embodiment of the invention is elaborated.
Please refer to shown in Fig. 2, is the schematic diagram of an Application Example of the combined cycle cogeneration Processes and apparatus take coke-stove gas as fuel of one embodiment of the invention.As shown in the figure, the combined cycle cogeneration technique of the present embodiment comprises five branch's flow processs of utilizing gas turbine and exhaust heat boiler, the high-temperature flue gas that each exhaust heat boiler utilizes corresponding gas turbine to discharge is heat exchange thermal source, to provide required steam to steam turbine and hot user, wherein, in five branch's flow processs, quintafurcation flow process (corresponding to branch system E) is adjustable branch flow process, can enter steam turbine to the exhaust heat boiler in this branch's flow process, the flow of heating network regulates and distributes, so that the heat of output, electricity and actual heat, electricity demand is coordinated mutually.Corresponding with this technique, the combined cycle cogeneration equipment of the present embodiment comprises five branch system A～E (corresponding to five branch's flow processs) with gas turbine and exhaust heat boiler, the high-temperature flue gas that each exhaust heat boiler utilizes corresponding gas turbine to discharge is heat exchange thermal source, thereby provide required steam to steam turbine and hot user, in the present embodiment, the branch system E of corresponding quintafurcation flow process is adjustable branch system.
As shown in the figure, the gas turbine of the present embodiment comprises (air) gas compressor, the combustion gas turbine that after being used for coke-stove gas and compressing, the firing chamber of air mixed combustion and the rear flue gas of burning do work, wherein, the main shaft of each combustion gas turbine is connected with generator shaft, to realize the conversion of mechanical energy and electric energy, and export electric energy, the high-temperature flue gas of combustion gas turbine outlet simultaneously enters exhaust heat boiler, the high-temperature steam producing in each exhaust heat boiler is selected for promoting steam turbine acting or supplying with hot user's heat, steam turbine is connected with generator and exports electric energy, the steam of steam turbine outlet simultaneously flows to hot user's heat.
In the present embodiment, the exhaust heat boiler of adjustable branch system E is to adopt two pressure exhaust heat boilers, and the high pressure vapour of this pair of pressure exhaust heat boiler is supplied with steam turbine, and low-pressure steam is directly supplied with hot user.
Below in conjunction with Fig. 2, the Processes and apparatus of the present embodiment is elaborated, the present embodiment has adopted five gas turbines, wherein gas turbine has two kinds of models, gas turbine A100～the D100 that is branch system A～D adopts T60 type, the gas turbine E100 of branch system E adopts T130 type, T130 and T60 type gas turbine are the matured product of the top manufacturer Caterpillar-Suo La of international light-duty combustion machine company, the former high-energy fuel such as rock gas that are mainly used in; T60 and T130 type unit are that rope draws two the most ripe products of small-sized combustion machine.T60 combustion machine full name is Taurus 60, and specified generated output is 5500KW.T130 combustion machine full name is god of unusual strength 130, specified 15000KW.Each gas turbine 100 has the firing chamber of the coke-stove gas that is suitable for burning, coke-stove gas is as lower calorific value, high hydrogen fuel, be different from the unit with higher calorific value rock gas, low, the easy detonation of its calorific value, operating pressure is high, danger is strong, different on installation form, in the present invention, each firing chamber is provided with the unit fuel endless tube of more than two or two coke-stove gas, to obtain required calorific value, select and install with reference to prior art, to repeat no more as for the specifications and models of endless tube herein.After every gas turbine 100, be all equipped with an exhaust heat boiler 300, wherein exhaust heat boiler has two kinds of models, and the exhaust heat boiler of branch system A～D A300～D300 adopts single-pressure HGSR; The exhaust heat boiler E300 of branch system E adopts two pressure exhaust heat boilers; Be provided with on the whole a back pressure type steam turbine 500.The heat-supplying mode that steams of exhaust heat boiler 100 has three kinds, and the exhaust heat boiler A300 of branch system A steams all for heat supply; Exhaust heat boiler B300～D300 of branch system B～D steams and all supplies steam turbine 500; The exhaust heat boiler E300 of branch system E steams different, and its high pressure vapour is supplied with steam turbine 500, and low-pressure steam is directly supplied with hot user.
The fuel supply of five gas turbines all adopts the coke-stove gas after purified treatment, carries out pressurized treatment entering before the firing chamber of each gas turbine, to mate with the air pressure entering.
The import of all gas turbines is all provided with air-filtering and cooling unit, and so that the air that enters gas turbine is filtered, and it is cooling to adopt the suitable type of cooling (as atomized water spray etc.) to carry out, to reduce the wasted work of each gas compressor.
The working procedure of equipment of the present invention is as follows:
First describe as an example of branch system A example: through filtering, cooling air enters firing chamber after by gas compressor supercharging, coke-stove gas through purified treatment passes into firing chamber simultaneously, the two mixes in firing chamber, burning, flue gas after burning enters combustion gas turbine and does work, the main shaft of combustion gas turbine is connected with generator shaft, realize the conversion of mechanical energy and electric energy, output electric energy, the high-temperature flue gas of combustion gas turbine outlet simultaneously further enters exhaust heat boiler work, exhaust heat boiler is the heat transmission equipment of the flue gas of water and gas turbine discharge, the high-temperature steam wherein producing is directly supplied with hot user's heat,
Again take branch system B as example: through filtering, cooling air enters firing chamber after by gas compressor supercharging, coke-stove gas through purified treatment passes into firing chamber simultaneously, the two mixes in firing chamber, burning, flue gas after burning enters combustion gas turbine and does work, the main shaft of combustion gas turbine is connected with generator shaft, realize the conversion of mechanical energy and electric energy, output electric energy, the high-temperature flue gas of combustion gas turbine outlet simultaneously further enters exhaust heat boiler B300, exhaust heat boiler is the heat transmission equipment of the flue gas of water and gas turbine discharge, the high-temperature steam wherein producing is sent into steam turbine 500, for promoting the steam turbine acting of steam turbine 500, steam turbine is connected with generator and exports electric energy, the steam of steam turbine outlet simultaneously still has certain available heat, can be flowed to industrial user with hot,
The working procedure of branch system C, D is similar to branch system B, repeats no more herein;
Finally the working procedure of branch system E is described: through filtering, cooling air enters firing chamber after by gas compressor supercharging, coke-stove gas through purified treatment passes into firing chamber simultaneously, the two mixes in firing chamber, burning, flue gas after burning enters combustion gas turbine and does work, the main shaft of combustion gas turbine is connected with generator shaft, realize the conversion of mechanical energy and electric energy, output electric energy, the high-temperature flue gas of combustion gas turbine outlet simultaneously further enters two pressure exhaust heat boiler E300, the high pressure vapour that two pressure exhaust heat boiler E300 produce is sent into steam turbine 500, for promoting the steam turbine acting of steam turbine 500, steam turbine is connected with generator and exports electric energy, the low-pressure steam that two pressure exhaust heat boiler E300 produce is directly supplied with hot user.
The water that wherein exhaust heat boiler consumes in producing steam is to supplement by reverse osmosis water manufacturing system.In this process, reverse osmosis demineralized water that water manufacturing system produces supplied further to heat by exhaust heat boiler feed water preheater after steam turbine shaft seal heater heats through desalination water pump before this again, demineralized water temperature is improved, then send into oxygen-eliminating device and carry out deoxygenation, finally send into boiler by high low pressure feed water pump again.
Utilize said structure, can, according to the grade height of energy, carry out Proper Match to the configuration of the mode of steaming in exhaust heat boiler, be conducive to provide the efficiency of entire system.In addition, due to the steam supply way of each exhaust heat boiler, existing direct heating user's mode, also there is the direct mode for steam turbine, and the steam turbine adopting is back pressure type, it goes out vapour and can be used as again heat supply use, thereby can realize heat supply flexibly and power demands.
The combined cycle cogeneration process system of the present invention take coke-stove gas as fuel, on the basis with reference to conventional combined cycle, conventional cogeneration of heat and power technology, in conjunction with the processing use of coke-stove gas in process of coking construction implement with many gas turbines, many co-generation units that exhaust heat boiler mates mutually, in exhaust heat boiler, heat exchange produces steam, the flow that enters steam turbine and direct heating can suitably distribute at any time, with the heat and electricity of output reasonable production, coordinate mutually with actual heat, electric demand.Outstanding feature of the present invention is that the thermal efficiency of total system is high, and power supply heat supply is flexible, and each equipment maintenance is convenient.In addition, also have that investment is little, the construction period is short, take up an area less, the advantage such as water saving.
The novelty of flow process of the present invention, is to take full advantage of the middle aerogenesis coke-stove gas in carbonization of coal, carries out combined cycle cogeneration take it as fuel.By the layout of idiographic flow, both combined the high efficiency of combined cycle, expand again the temperature range of cogeneration of heat and power, thereby overall performance is high, and there is heat and power supply characteristic flexibly, not only meet the demand of the hot electricity consumption of whole station-service, but also can provide unnecessary heat or electric for the external world, createed considerable economic benefit.
In the industrial actual arrangement mode shown in Fig. 2 as example, the combined cycle cogeneration device take coke-stove gas as fuel of the present embodiment is carried out to the explanation of related application and data below.Its whole system comprises five branch system A-E and a steam turbine power generating F.Wherein, branch system A-D adopts T60 gas turbine and single-pressure HGSR, and branch system E adopts T130 gas turbine and two pressure exhaust heat boiler.Branch system A does not connect steam turbine, but adopts the form of steam direct heating; In branch system B-D and E, the high voltage terminal of exhaust heat boiler 300 is connected with the back pressure turbine 500 of steam turbine power generating F, and the outlet steam of steam turbine 500 is sent into industrial heat user heat supply; The low voltage terminal steam direct heating of the exhaust heat boiler E300 of branch system E.Combustion gas turbine in each branch system and steam turbine all can output electric energy, the heat energy of the low voltage terminal output of branch system A and E take steam as carrier, and the smoke evacuation of branch system A～E exhaust heat boiler can be directly discharged to environment.
In a specific embodiment of the present invention, design conditions major parameter is as shown in table 1.
The setting parameter of system under table 1 design conditions
For previous designs operating mode, as shown in table 2 by the performance of each flow sheet equipment in the system calculating in detail.
Table 2A-E flow process fire is with analyzing
For design conditions parameter and each flow sheet equipment performance, the overall performance ginseng of system is shown in Table 3.And the performance of conventional co-generation unit is according to current related data, be between 10～30 in pressure ratio, the thermal efficiency of simple Ideal Cycle is 33%～38%, the thermal efficiency of combined cycle is 55%～60%, the thermal efficiency of coal-fired steam turbine power plant is 35%～42%, and the thermal efficiency of IGCC take gas turbine engine systems as core is 45%～55%.And the entire system thermal efficiency of the present invention has reached 71.42%, fire has also reached 62.46% by efficiency.Thereby can find out apparatus arrangement mode of the present invention and with can form more conventional cogeneration of heat and power compared with combined cycle, aspect the flexibility of efficiency and heat, CCHP, there is certain advantage.
Table 3 entire system performance
As shown in table 3, the overall thermal efficiency of the Combined-cycle Cogeneration Systems take coke-stove gas as fuel is 71.42%, and fire is 62.46% by efficiency.Ignore the fire use of industrial heat user use energy process due to the computational methods that relate to and lost, so can infer that the fire efficiency of combined cycle system in actual production will be a little less than 62.46%.By the combined cycle cogeneration device of the effective utilization to industrial by-product combustion gas-coke-stove gas, both realized the combine output of heat energy with electric energy, reach again higher system effectiveness; Owing to combining the advantage of combined cycle and cogeneration of heat and power, thereby system effectiveness Improvement is greatly increased; Simultaneously can be according to different use heat and needs for electricity, reasonably distribute high-temperature steam heat supply and the ratio that enters steam turbine power generation after residual heat boiler for exchanging heat, thereby distribute flexibly heat supply and electrogenesis amount, realize thermoelectricity and coordinate suitable output, there is good industrial utilization and be worth.
The present invention explains in detail with previous embodiment, to understand fully feature and operational improvement for these reinforcements are provided.In addition, it is also understood that structure characteristics that these are additional and the operations improvement use that can use separately or mutually combine, and separately or in conjunction with the explanation of the mode of execution shown in above-mentioned all features and element and accompanying drawing.Therefore, should be appreciated that the combination that the invention is not restricted to any concrete feature or element, and the Feature Combination of any expectation described here can be implemented and not depart from protection scope of the present invention.
Claims (8)
1. a combined cycle cogeneration equipment, it is provided with multiple branch systems that comprise gas turbine and exhaust heat boiler, the high-temperature flue gas that described exhaust heat boiler utilizes corresponding gas turbine to discharge is heat exchange thermal source, to provide required steam to steam turbine and hot user, it is characterized in that, described gas turbine comprises air compressor, burning coke-stove gas and the firing chamber of the rear air of compression and the combustion gas turbine that flue gas after burning is done work, the main shaft of combustion gas turbine connects with corresponding generator shaft the conversion that realizes mechanical energy and electric energy, output electric energy, the high-temperature flue gas of combustion gas turbine outlet simultaneously enters exhaust heat boiler, the high-temperature steam producing in each exhaust heat boiler is selected for promoting steam turbine acting or supplying with hot user's heat, the steam turbine of steam turbine is connected and exports electric energy with corresponding generator, the steam of steam turbine outlet simultaneously flows to hot user's heat, in described branch system, has one at least for adjustable branch system, so that exhaust heat boiler is wherein entered to steam turbine, the flow of heating network regulates and distributes, so that the heat of output, electricity and actual heat, electricity demand is coordinated mutually, and the exhaust heat boiler of described adjustable branch system is two pressure exhaust heat boilers, the high pressure vapour of this pair of pressure exhaust heat boiler is supplied with steam turbine, low-pressure steam is directly supplied with hot user, the gas turbine being connected with described pair of pressure exhaust heat boiler in described adjustable branch system adopts T130 type, the gas turbine of other branch system adopts T60 type, each gas turbine has the firing chamber of the coke-stove gas that is suitable for burning, and each firing chamber is provided with the unit fuel endless tube of more than two or two coke-stove gas, described equipment also comprises reverse osmosis water manufacturing system, the demineralized water of described reverse osmosis water manufacturing system supplied further to heat by exhaust heat boiler feed water preheater after steam turbine shaft seal heater heats through desalination water pump before this again, demineralized water temperature is improved, then send into oxygen-eliminating device and carry out deoxygenation, finally send into exhaust heat boiler by high low pressure feed water pump again.
2. combined cycle cogeneration equipment as claimed in claim 1, is characterized in that, in described branch system, and the steaming all for heat supply of the exhaust heat boiler of at least one branch system, at least exhaust heat boiler of another branch system all supply steam turbines that steam.
3. combined cycle cogeneration equipment as claimed in claim 1, it is characterized in that, the fuel of described each gas turbine is the coke-stove gas adopting after purified treatment, utilizes gas compressor to carry out pressurized treatment entering before gas-turbine combustion chamber, to mate with the air pressure entering.
4. the combined cycle cogeneration equipment as described in claims 1 to 3 any one, is characterized in that, the entry end of described gas turbine is provided with inlet air filtration and the cooling equipment of air.
5. a combined cycle cogeneration technique, it comprises multiple branch's flow processs of utilizing gas turbine and exhaust heat boiler, the high-temperature flue gas that described exhaust heat boiler utilizes corresponding gas turbine to discharge is heat exchange thermal source, to provide required steam to steam turbine and hot user, it is characterized in that, described gas turbine comprises air compressor, the combustion gas turbine that after burning coke-stove gas and compression, after the firing chamber of air and burning, flue gas does work, the main shaft of combustion gas turbine connects with corresponding generator shaft the conversion that realizes mechanical energy and electric energy, output electric energy, the high-temperature flue gas of combustion gas turbine outlet simultaneously enters exhaust heat boiler, the high-temperature steam producing in each exhaust heat boiler is selected for promoting steam turbine acting or supplying with hot user's heat, the steam turbine of steam turbine is connected and exports electric energy with corresponding generator, the steam of steam turbine outlet simultaneously flows to hot user's heat, in described branch flow process, has one at least for adjustable branch flow process, so that exhaust heat boiler is wherein entered to steam turbine, the flow of heating network regulates and distributes, so that the heat of output, electricity and actual heat, electricity demand is coordinated mutually, and the exhaust heat boiler in described adjustable branch flow process is two pressure exhaust heat boilers, the high pressure vapour of this pair of pressure exhaust heat boiler is supplied with steam turbine, low-pressure steam is directly supplied with hot user, in described adjustable branch flow process, the gas turbine being connected with described pair of pressure exhaust heat boiler adopts T130 type, the gas turbine of other branch's flow process adopts T60 type, each gas turbine has the firing chamber of the coke-stove gas that is suitable for burning, and each firing chamber is provided with the unit fuel endless tube of more than two or two coke-stove gas, and the water that described exhaust heat boiler consumes in producing steam is to supplement by reverse osmosis water manufacturing system, the demineralized water of described reverse osmosis water manufacturing system supplied further to heat by exhaust heat boiler feed water preheater after steam turbine shaft seal heater heats through desalination water pump before this again, demineralized water temperature is improved, then send into oxygen-eliminating device and carry out deoxygenation, finally send into exhaust heat boiler by high low pressure feed water pump again.
6. combined cycle cogeneration technique as claimed in claim 5, it is characterized in that, in described multiple branches flow process, the steaming all for heat supply of the exhaust heat boiler of at least one branch flow process, at least exhaust heat boiler of another branch's flow process all supply steam turbines that steam.
7. combined cycle cogeneration technique as claimed in claim 5, is characterized in that, also comprises air is filtered and sprays cooling before air enters described gas turbine.
8. the combined cycle cogeneration technique as described in claim 5 to 7 any one, it is characterized in that, the fuel of described each gas turbine adopts the coke-stove gas after purified treatment, carries out pressurized treatment entering before gas-turbine combustion chamber, to mate with the air pressure entering.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110112807.0A CN102191957B (en) | 2011-05-03 | 2011-05-03 | Combined cycle and combined heat and power (CHP) equipment and process |
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| US9951977B2 (en) | 2015-07-30 | 2018-04-24 | International Business Machines Corporation | Adsorbing heat exchanger |
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| CN102510094B (en) * | 2011-10-23 | 2013-08-14 | 西安交通大学 | Combined cycle and pure condensed steam thermal power scheduling system and method |
| CN103836604B (en) * | 2014-03-03 | 2016-01-27 | 上海宝钢节能环保技术有限公司 | A kind of waste heat recovery cogeneration system |
| CN104088697A (en) * | 2014-06-26 | 2014-10-08 | 华电电力科学研究院 | Container type gas power generation system |
| US9739179B2 (en) | 2015-03-13 | 2017-08-22 | International Business Machines Corporation | Working fluid for a device, device and method for converting heat into mechanical energy |
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| CN108119891B (en) * | 2017-12-18 | 2019-04-12 | 新智能源系统控制有限责任公司 | A kind of distributed energy cogeneration of heat and power multivariable control system and method |
| CN109634114B (en) * | 2018-11-28 | 2021-08-31 | 北京和隆优化科技股份有限公司 | Coordinated control method for steam pipe network and gas pipe network of metallurgical gas boiler |
| CN110030050A (en) * | 2019-04-11 | 2019-07-19 | 广州发展集团股份有限公司 | A kind of combined cycle system and operating procedure |
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