CN113899110A - Absorption type cooling and heating combined supply system with intermediate process - Google Patents
Absorption type cooling and heating combined supply system with intermediate process Download PDFInfo
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- CN113899110A CN113899110A CN202111346634.9A CN202111346634A CN113899110A CN 113899110 A CN113899110 A CN 113899110A CN 202111346634 A CN202111346634 A CN 202111346634A CN 113899110 A CN113899110 A CN 113899110A
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 116
- 238000010438 heat treatment Methods 0.000 title claims abstract description 99
- 238000001816 cooling Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 62
- 230000008569 process Effects 0.000 title claims abstract description 62
- 239000006096 absorbing agent Substances 0.000 claims abstract description 133
- 239000007788 liquid Substances 0.000 claims description 13
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 9
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 33
- 239000003546 flue gas Substances 0.000 abstract description 33
- 239000002918 waste heat Substances 0.000 abstract description 16
- 238000011084 recovery Methods 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 12
- 239000002028 Biomass Substances 0.000 abstract description 7
- 238000005057 refrigeration Methods 0.000 abstract description 7
- 239000002803 fossil fuel Substances 0.000 abstract description 5
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 41
- 229910021529 ammonia Inorganic materials 0.000 description 18
- 238000010586 diagram Methods 0.000 description 13
- 238000001704 evaporation Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 238000010992 reflux Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000004484 Briquette Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/006—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the sorption type system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
- F25B49/043—Operating continuously
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention is suitable for the field of refrigeration and heat pumps, and discloses an absorption type combined cooling and heating system with an intermediate process. The boiler unit generates heat energy through combustion of fossil fuel or biomass, and transmits the heat energy to the absorption unit through a heat source medium to be used as a driving energy source, and the intermediate evaporator performs step recovery of flue gas waste heat; the absorption unit generates a waste heat gradient recovery effect in the intermediate evaporator, generates a refrigeration effect in the evaporator, generates a heating effect in the condenser, the rectifier and the absorber, and transmits the heating effect to the cold and heat combined supply unit through cold carrying media and heat carrying media; the cold and hot combined supply unit realizes heat release of a heat-carrying medium in summer and heat absorption of a cold-carrying medium in winter at the outdoor unit, realizes cold supply of the cold-carrying medium in summer at the indoor cold supply machine, and realizes heat supply of the heat-carrying medium in winter at the indoor heat supply machine.
Description
Technical Field
The invention relates to the field of refrigeration and heat pumps, in particular to an absorption type combined cooling and heating system with an intermediate process.
Background
With the development of society, energy and environmental problems are increasingly prominent, and the energy and environmental problems become the focus of attention of all countries in the world. The reserves of conventional energy have been difficult to support the development of future society, and mankind needs to accelerate the development of new energy, change energy structure, alleviate energy pressure. Meanwhile, China is in the accelerated development period of urbanization, the energy consumption is huge, and the tasks of energy conservation and emission reduction are very difficult. According to statistics, the building energy consumption accounts for 46.7% of the total social energy consumption, and the northern heating energy consumption accounts for 40% of the total national building energy consumption.
Compared with cities, rural areas have dispersed habitation, cannot build heat supply pipelines in a large-scale and centralized manner like cities, do not have the mode of developing and adopting regional centralized heat supply, cannot build and operate large-scale heat supply facilities, and mostly adopt a dispersed heat supply or household heat supply mode at present. Firewood, loose coal, honeycomb briquette, gas stove, coal briquette stove and the like are commonly used, and high-temperature flue gas or hot water is combined with an earthen bed, a suspended bed, a hot wall, earth heating and the like for heating in winter. The heating mode has the problems of high energy consumption, low energy utilization efficiency, serious environmental pollution and the like. Meanwhile, the rural areas have wide air conditioning refrigeration requirements in summer, and the requirements are generally met by purchasing an electrically-driven compression air conditioner by self. However, the conventional compression system consumes a large amount of electric power, is expensive in operation cost, and is not suitable for large-scale popularization in rural areas. Therefore, the research and development of clean and efficient cooling and heating combined supply technology in rural areas is urgent.
An absorption system is a device that is driven by thermal energy and produces a cooling/heating effect. Industrial waste heat and clean energy such as natural gas, coal gas, biomass, solar energy and the like can be utilized. Therefore, the absorption system can provide cold energy and heat energy for users in areas far away from a power grid, a heat supply network or areas with insufficient power and inconvenient heat supply network construction, and meets social requirements of energy conservation, emission reduction, carbon neutralization and sustainable development. However, the conventional absorption system has the following problems: different from a compression system, an absorption system releases cold energy by virtue of evaporation of a working medium and releases heat energy by virtue of condensation of the working medium and absorption of a solution, and the refrigeration and heating modes are inconvenient to switch and difficult to realize combined supply of cold and heat; the absorption system is usually connected with a city heat supply pipe network to exchange heat between a heat source and a primary pipe network or between the primary pipe network and a secondary pipe network, and does not have the function of independent heat supply; and thirdly, the traditional absorption system is difficult to utilize waste heat, so that the waste heat emission temperature is high, and the heat source utilization rate is low.
Disclosure of Invention
The invention aims to provide an absorption type cold-heat combined supply system with an intermediate process, which can utilize various energy sources including fossil fuel and biomass and provide valve group switching to realize summer cold supply and winter heat supply of a single set of absorption units.
In order to achieve the purpose, the invention provides the following scheme:
an absorption type combined cooling and heating system with an intermediate process comprises a boiler unit, an absorption type unit and a combined cooling and heating unit; the absorption unit comprises a generator, a rectifier, a condenser, a working medium primary throttle valve, an intermediate evaporator, a separator, a working medium secondary throttle valve, an evaporator, a solution primary throttle valve, an intermediate absorber, a solution secondary throttle valve, an absorber and a solution pump; the combined cooling and heating unit comprises an outdoor unit, an indoor cooling machine, an indoor heating machine, a cold carrying medium pump, a heat carrying medium pump and a valve group;
a heat source medium outlet of the boiler unit is connected with a heat source medium inlet of the generator, a heat source medium outlet of the generator is connected with a heat source medium inlet of the boiler unit, and the boiler unit is also connected with an intermediate evaporator;
the steam outlet of the generator is connected with the steam inlet of the rectifier, the return port of the rectifier is connected with the return port of the generator, the steam outlet of the rectifier is sequentially connected with the condenser, the working medium primary throttling valve, the intermediate evaporator and the separator, the gas outlet of the separator is connected with the intermediate absorber, the liquid outlet of the separator is sequentially connected with the working medium secondary throttling valve, the evaporator and the absorber, the solution outlet of the generator is sequentially connected with the primary throttling valve, the intermediate absorber, the solution secondary throttling valve, the absorber and the solution pump, and the solution pump is connected with the generator through the intermediate absorber;
the valve group comprises a first valve, a second valve, a third valve, a fourth valve, a fifth valve and a sixth valve, the outdoor unit is connected with the condenser and the absorber in any sequence through the first valve and then is connected with the heat-carrying medium pump, a first outlet of the heat-carrying medium pump is connected with the outdoor unit through the fifth valve, a second outlet of the heat-carrying medium pump is connected with the indoor heat supply machine through the sixth valve, and the indoor heat supply machine is connected with the absorber; the outdoor unit is sequentially connected with the evaporator and the cold-carrying medium pump through the second valve, a first outlet of the cold-carrying medium pump is connected with the outdoor unit through the fourth valve, a second outlet of the cold-carrying medium pump is connected with the indoor cold supply machine through the third valve, and the indoor cold supply machine is connected with the evaporator; the combined cooling and heating unit is used for cooling, the first valve, the third valve and the fifth valve are opened, and the second valve, the fourth valve and the sixth valve are closed; the cold and hot combined supply unit is used for supplying heat, the second valve, the fourth valve and the sixth valve are opened, and the first valve, the third valve and the fifth valve are closed.
Illustratively, the boiler unit includes a boiler and a heat source medium pump, and the heat energy generated by the boiler is transmitted to the generator through the heat source medium pump.
Illustratively, the outdoor unit, the first valve, the condenser, the absorber and the heat carrier pump are connected in sequence; or
The outdoor unit, the first valve, the absorber, the condenser and the heat-carrying medium pump are connected in sequence.
Exemplarily, the rectifier is further configured to heat a heat carrier, and the outdoor unit is connected to the condenser, the rectifier, and the absorber in any order through the first valve and then connected to the heat carrier pump.
Illustratively, the outdoor unit, the first valve, the condenser, the rectifier, the absorber and the heat carrier pump are connected in sequence; or
The outdoor unit, the first valve, the absorber, the condenser, the rectifier and the heat-carrying medium pump are connected in sequence.
Illustratively, the absorption unit further comprises a heat carrier preheater, the outdoor unit is connected with the heat carrier preheater, the condenser, the rectifier and the absorber in any order through the first valve and then connected with the heat carrier pump, and the boiler unit is connected with the intermediate evaporator and the heat carrier preheater in any order.
Exemplarily, the outdoor unit, the first valve, the heat-carrying medium preheater, the condenser, the rectifier, the absorber and the heat-carrying medium pump are connected in sequence, and the boiler unit connection, the intermediate evaporator and the heat-carrying medium preheater are connected in sequence; or
The outdoor unit, the first valve, the heat-carrying medium preheater, the condenser, the rectifier, the absorber and the heat-carrying medium pump are sequentially connected, and the boiler unit connection, the intermediate evaporator and the heat-carrying medium preheater are sequentially connected.
Illustratively, the absorption unit further comprises a solution preheater, the solution pump is connected with the intermediate absorber in any order, the solution preheater is connected with the generator, and the boiler unit is connected with the solution preheater and the intermediate evaporator in any order.
Illustratively, the absorption unit further comprises a heat carrier preheater, the outdoor unit is connected with the heat carrier preheater, the condenser and the absorber in any order through the first valve and then connected with the heat carrier pump, and the boiler unit is connected with the intermediate evaporator and the heat carrier preheater in any order.
Illustratively, the rectifier is further used for heating the solution output by the solution pump, and the solution pump is connected with the generator after connecting the rectifier and the intermediate absorber in any order.
Illustratively, the solution pump, the intermediate absorber, the rectifier and the generator are connected in sequence; or
The solution pump, the rectifier, the intermediate absorber and the generator are connected in sequence.
Illustratively, the absorption unit further comprises a solution preheater, the solution pump is connected with the generator after connecting the rectifier, the intermediate absorber and the solution preheater in any order, and the boiler unit is connected with the solution preheater and the intermediate evaporator in any order.
Illustratively, the absorption unit further comprises a subcooler, a liquid outlet of the separator is sequentially connected with the working medium secondary throttling valve and the evaporator through the subcooler, and the evaporator is connected with the absorber through the subcooler.
Exemplarily, the absorption unit further comprises a solution preheater and a heat-carrying medium preheater, the rectifier is further configured to heat a solution output by the solution pump, the solution pump is connected to the rectifier, the intermediate absorber and the generator in any order, the outdoor unit is connected to the heat-carrying medium preheater, the condenser and the absorber in any order through the first valve, and then is connected to the heat-carrying medium pump, and the boiler unit is connected to the solution preheater, the intermediate evaporator and the heat-carrying medium preheater in any order.
Illustratively, the absorption unit further comprises a subcooler, a steam outlet of the rectifier is sequentially connected with the condenser, the subcooler, the working medium primary throttling valve, the intermediate evaporator and the separator, and a liquid outlet of the separator is sequentially connected with the working medium secondary throttling valve, the evaporator, the subcooler and the absorber.
Exemplarily, the absorption unit further comprises a solution preheater and a heat-carrying medium preheater, the rectifier is further configured to heat a solution output by the solution pump, the solution pump is connected to the generator after being connected to the rectifier, the intermediate absorber and the solution preheater in any order, the outdoor unit is connected to the heat-carrying medium preheater, the condenser, the absorber and the heat-carrying medium pump in any order through the first valve, and the boiler unit is connected to the solution preheater, the intermediate evaporator and the heat-carrying medium preheater in any order.
Exemplarily, the combined cooling and heating unit further comprises a cold-carrying medium storage tank and a heat-carrying medium storage tank, the cold-carrying medium storage tank is arranged between the evaporator and the cold-carrying medium pump, and the heat-carrying medium storage tank is arranged between the absorber and the heat-carrying medium pump.
Illustratively, the absorption chiller-heater cogeneration system with an intermediate process uses at least one of water, ethylene glycol, alcohol, propylene glycol, methylene chloride, a calcium chloride solution, and a sodium chloride solution as a cold or heat carrying medium.
The invention provides an absorption type combined cooling and heating system with an intermediate process. The boiler unit generates heat energy through combustion of fossil fuel or biomass and transmits the heat energy to the absorption unit through a heat source medium to serve as a driving energy source; the absorption unit generates a waste heat recovery effect in the intermediate evaporator, generates a refrigeration effect in the evaporator, generates a heating effect in the condenser, the rectifier and the absorber, and transmits the heating effect to the cold and heat combined supply unit through cold carrying media and heat carrying media; the cold and hot combined supply unit realizes heat release of a heat-carrying medium in summer and heat absorption of a cold-carrying medium in winter at the outdoor unit, realizes cold supply of the cold-carrying medium in summer at the indoor cold supply machine, and realizes heat supply of the heat-carrying medium in winter at the indoor heat supply machine. The three processes and the corresponding valve bank switching realize the summer cooling and winter heating of the single set of absorption units, and the multi-component coupling realizes the cascade recovery of waste heat, thereby improving the primary energy efficiency of the system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an absorption chiller-heater cogeneration system with an intermediate process according to embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of an absorption chiller-heater cogeneration system with an intermediate process according to embodiment 2 of the present invention;
fig. 3 is a schematic structural diagram of an absorption chiller-heater cogeneration system with an intermediate process according to embodiment 3 of the present invention;
fig. 4 is a schematic structural diagram of an absorption chiller-heater cogeneration system with an intermediate process according to embodiment 4 of the present invention;
fig. 5 is a schematic structural diagram of an absorption chiller-heater cogeneration system with an intermediate process according to embodiment 5 of the present invention;
fig. 6 is a schematic structural diagram of an absorption chiller-heater cogeneration system with an intermediate process according to embodiment 6 of the present invention;
fig. 7 is a schematic structural diagram of an absorption chiller-heater cogeneration system with an intermediate process according to embodiment 7 of the present invention;
fig. 8 is a schematic structural diagram of an absorption chiller-heater cogeneration system with an intermediate process according to embodiment 8 of the present invention;
fig. 9 is a schematic structural diagram of an absorption chiller-heater cogeneration system with an intermediate process according to embodiment 9 of the present invention;
fig. 10 is a schematic structural diagram of an absorption chiller-heater cogeneration system with an intermediate process according to embodiment 10 of the present invention;
fig. 11 is a schematic structural diagram of an absorption chiller-heater cogeneration system with an intermediate process according to embodiment 11 of the present invention;
fig. 12 is a schematic structural diagram of an absorption chiller-heater cogeneration system with an intermediate process according to embodiment 12 of the present invention;
fig. 13 is a schematic structural diagram of a combined cooling and heating unit according to another embodiment of the present invention.
The reference numbers illustrate:
(1) a boiler; (2) a heat source medium pump; (3) an absorption unit; (4) an outdoor unit; (5) and an indoor cooling machine; (6) an indoor heat supply machine; (7) a cold carrying medium pump; (8) a heat transfer medium pump; (9) a valve group; (9-1), a first valve; (9-2), a second valve; (9-3), a third valve; (9-4), a fourth valve; (9-5), a fifth valve; (9-6), a sixth valve; (10) a generator; (11) a rectifier; (12) a condenser; (13) a working medium primary throttle valve; (14) an intermediate evaporator; (15) a separator; (16) a subcooler; (17) the working medium secondary throttle valve; (18) an evaporator; (19) a solution primary throttling valve; (20) an intermediate absorber; (21) a solution secondary throttling valve; (22) an absorber; (23) a solution pump; (24) a solution preheater; (25) a heat-carrying medium preheater; (26) a cold carrying medium storage tank; (27) and a heat carrier storage tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1 to 13, which are absorption chiller-heater co-generation systems with intermediate processes according to an embodiment of the present invention, a valve bank (9) is provided to switch between summer cooling and winter heating of a single absorption unit by using various energy sources including fossil fuel and biomass.
Referring to fig. 1 to 13, an absorption chiller-heater system with an intermediate process according to an embodiment of the present invention includes a boiler unit, an absorption unit (3), and a chiller-heater unit; the absorption unit (3) comprises a generator (10), a rectifier (11), a condenser (12), a working medium primary throttle valve (13), an intermediate evaporator (14), a separator (15), a working medium secondary throttle valve (17), an evaporator (18), a solution primary throttle valve (19), an intermediate absorber (20), a solution secondary throttle valve (21), an absorber (22) and a solution pump (23); the combined cooling and heating unit comprises an outdoor unit (4), an indoor cooling machine (5), an indoor heating machine (6), a cold-carrying medium pump (7), a heat-carrying medium pump (8) and a valve group (9);
the heat source medium outlet of the boiler unit is connected with the heat source medium inlet of the generator (10), the heat source medium outlet of the generator (10) is connected with the heat source medium inlet of the boiler unit, and the boiler unit and the generator (10) form a heat source medium circulation loop. The boiler unit is also connected with an intermediate evaporator (14), fuel and air F1 enter the boiler unit through a fuel and air inlet, become flue gas F2 after burning in the boiler (1), the flue gas F2 enters the intermediate evaporator (14), the waste heat recovery process is carried out, the temperature is reduced to become flue gas F3 and is discharged out of the system, and therefore flue gas circulation is completed.
A steam outlet of the generator (10) is connected with a steam inlet of the rectifier (11), a reflux port of the rectifier (11) is connected with a reflux port of the generator (10), a steam outlet of the rectifier (11) is sequentially connected with the condenser (12), the working medium primary throttle valve (13), the intermediate evaporator (14) and the separator (15), a gas outlet of the separator (15) is connected with the intermediate absorber (20), a liquid outlet of the separator (15) is connected with the working medium secondary throttle valve (17), the evaporator (18) and the absorber (22), a solution outlet of the generator (10) is sequentially connected with the primary throttle valve, the middle absorber (20), the solution secondary throttle valve (21), the absorber (22) and the solution pump (23) are connected, the solution pump (23) is connected with the generator (10) through the middle absorber (20), so that a working medium circulation loop is formed, and the working flow of the working medium circulation loop is as follows:
ammonia vapor generated by the generator (10) enters the rectifier (11) and is subjected to a rectification process, generated reflux liquid enters the generator (10), the ammonia concentration of the ammonia vapor is increased and then enters the condenser (12) and is subjected to a condensation process, generated condensate enters the intermediate evaporator (14) after being throttled by the working medium primary throttle valve (13), part of the evaporation process is performed and enters the separator (15) for gas-liquid separation, wherein the ammonia vapor enters the intermediate absorber (20), and the liquid ammonia enters the evaporator (18) after being throttled by the working medium secondary throttle valve (17), is subjected to an evaporation process to become ammonia vapor and then enters the absorber (22); the dilute solution generated by the generator (10) enters an intermediate absorber (20) after being throttled by the solution primary throttle valve (19) and is subjected to an intermediate absorption process, ammonia vapor is absorbed to form an intermediate solution, the intermediate solution enters an absorber (22) after being throttled by the solution secondary throttle valve (21), the ammonia vapor is absorbed to form a concentrated solution, the concentrated solution is subjected to a solution heating process by the intermediate absorber (20) after being pressurized by a solution pump (23), the temperature is gradually increased and finally enters the generator (10), and therefore working medium circulation is completed.
The valve group (9) comprises a first valve (9-1), a second valve (9-2), a third valve (9-3), a fourth valve (9-4), a fifth valve (9-5) and a sixth valve (9-6), the outdoor unit (4) is connected with the condenser (12) and the absorber (22) in any sequence through the first valve (9-1) and then is connected with the heat-carrying medium pump (8), a first outlet of the heat-carrying medium pump (8) is connected with the outdoor unit (4) through the fifth valve (9-5), a second outlet of the heat-carrying medium pump (8) is connected with the indoor heat supply machine (6) through the sixth valve (9-6), and the indoor heat supply machine (6) is connected with the absorber (22), so that a heat-carrying medium circulation loop is formed; the outdoor unit (4) is sequentially connected with the evaporator (18) and the cold-carrying medium pump (7) through the second valve (9-2), a first outlet of the cold-carrying medium pump (7) is connected with the outdoor unit (4) through the fourth valve (9-4), a second outlet of the cold-carrying medium pump (7) is connected with the indoor cold supply machine (5) through the third valve (9-3), and the indoor cold supply machine (5) is connected with the evaporator (18), so that cold-carrying medium circulation is completed. When the combined cooling and heating unit is used for cooling, the first valve (9-1), the third valve (9-3) and the fifth valve (9-5) are opened, and the second valve (9-2), the fourth valve (9-4) and the sixth valve (9-6) are closed; when the combined cooling and heating unit is used for supplying heat, the second valve (9-2), the fourth valve (9-4) and the sixth valve (9-6) are opened, and the first valve (9-1), the third valve (9-3) and the fifth valve (9-5) are closed.
The working flows of the heat carrying medium circulation and the cold carrying medium circulation are as follows:
the heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, passes through the condenser (12) and the absorber (22) in any order, carries out the heating process of the heat-carrying medium in a cascade way, the temperature is gradually increased to become the heat-carrying medium S5, and the heat-carrying medium enters the combined cooling and heating unit; the cold-carrying medium S4 enters the absorption unit (3) from the combined cooling and heating unit, passes through the evaporator (18), absorbs the refrigerating capacity, reduces the temperature to become the cold-carrying medium S3, and enters the combined cooling and heating unit; the combined cooling and heating unit has two modes of winter heating and summer cooling, in the summer cooling mode, a first valve (9-1), a third valve (9-3) and a fifth valve (9-5) in a valve group (9) are opened, a second valve (9-2), a fourth valve (9-4) and a sixth valve (9-6) are closed, a cold-carrying medium S3 is driven by a cold-carrying medium pump (7), enters an indoor cooling machine (5) through the third valve (9-3), the temperature is increased after cold is released indoors, becomes a cold-carrying medium S4 and enters an absorption unit (3), meanwhile, the cold-carrying medium S5 is driven by a heat-carrying medium pump (8), enters an outdoor unit (4) through the fifth valve (9-5), the temperature is reduced after heat is released outdoors, and becomes a heat-carrying medium S6 through the first valve (9-1) and enters the absorption unit (3), completing the circulation of the cooling and heat-carrying media; in the winter heat supply mode, a second valve (9-2), a fourth valve (9-4) and a sixth valve (9-6) in a valve group (9) are opened, a first valve (9-1), a third valve (9-3) and a fifth valve (9-5) are closed, a cold carrying medium S3 is driven by a cold carrying medium pump (7) and enters an outdoor unit (4) through the fourth valve (9-4), the temperature rises after heat is absorbed from the outdoor to become a cold carrying medium S4 and enters an absorption unit (3) through the second valve (9-2), meanwhile, the heat-carrying medium S5 is driven by a heat-carrying medium pump (8), enters an indoor heat supply machine (6) through a sixth valve (9-6), releases heat indoors, then reduces the temperature to become the heat-carrying medium S6, and enters an absorption unit (3), thereby completing the circulation of the cooling and heat-carrying media.
The absorption type combined cooling and heating system with the intermediate process comprises a boiler unit, an absorption type unit (3) and a combined cooling and heating unit. The boiler unit generates heat energy through combustion of fossil fuel or biomass and transmits the heat energy to the absorption unit (3) through a heat source medium to be used as a driving energy source; the absorption unit (3) generates a waste heat recovery effect in the intermediate evaporator (14), generates a refrigeration effect in the evaporator (18), generates a heating effect in the condenser (12), the rectifier (11) and the absorber (22), and transmits a cold and heat combined supply unit through a cold medium and a heat medium; the cold and heat combined supply unit realizes heat release of the heat-carrying medium in summer and heat absorption of the cold-carrying medium in winter in the outdoor unit (4), realizes cold supply of the cold-carrying medium in summer in the indoor cooling machine (5), and realizes heat supply of the heat-carrying medium in winter in the indoor heating machine (6). Summer cooling and winter heating of the single set of absorption units (3) are realized through the three processes and the corresponding valve group (9) switching, waste heat gradient recovery is realized by utilizing multi-component coupling, and the primary energy efficiency of the system is improved.
The working fluid is, understandably, liquid ammonia.
It will be appreciated that the cooling or heat carrying medium may be water, ethylene glycol, alcohol, propylene glycol, methylene chloride, calcium chloride solution and sodium chloride solution, or a combination of any two or more of the foregoing.
It is understood that the outdoor unit (4) may be any one of a water-cooled type, an air-cooled type and a buried pipe type, or may be a combination of any two or more of the above types.
It is understood that the indoor cooling machine (5) can be any one of a fan coil type, a floor radiation type and a roof radiation type, and can also be a combination of any two or more of the types.
It will be appreciated that the indoor heat supply machine (6) may be any one of a fan coil type, a radiator type, a floor radiation type and a roof radiation type, or a combination of any two or more of the above types.
Exemplarily, the boiler unit comprises a boiler (1) and a heat source medium pump (2), and the boiler (1) is further connected with an intermediate evaporator (14). The working flow of the boiler unit is as follows:
fuel and air F1 enter the boiler unit from the fuel & air inlet, burn in the boiler (1) as flue gas F2, and enter the intermediate evaporator (14); the heat energy generated in the combustion process is transferred to a heat source medium S1, is pumped to the absorption unit (3) by a heat source medium pump (2), and the temperature is reduced after heat release to become a heat source medium S2 and return to the boiler (1), thereby completing the circulation of the heat source medium;
the flue gas F2 enters an intermediate evaporator (14) to be subjected to a waste heat recovery process, and becomes flue gas F3 after the temperature is reduced and is discharged out of the system, so that flue gas circulation is completed.
It will be appreciated that the boiler (1) may be any one of a gas-fired boiler, a coal-fired boiler, an oil-fired boiler, a biomass boiler and a methanol boiler, or a combination of any two or more of the above types.
As shown in fig. 13, for example, in some embodiments, the combined heat and cold supply unit further includes a cold carrier storage tank (26) and a heat carrier storage tank (27), the cold carrier storage tank (26) is disposed between the evaporator (18) and the cold carrier pump (7), and the heat carrier storage tank (27) is disposed between the absorber (22) and the heat carrier pump (8). The cold-carrying medium S3 coming from the absorption unit (3) firstly enters the cold-carrying medium storage tank (26) for buffering and then is driven by the cold-carrying medium pump (7); the heat transfer medium S5 from the absorption unit (3) first enters the heat transfer medium storage tank (27) for buffering and is then driven by the heat transfer medium pump (8).
In the heat-carrying medium circulation circuit, the outdoor unit (4) is connected with the condenser (12) and the absorber (22) in any order through the first valve (9-1) and then connected with the heat-carrying medium pump (8), that is, the heat-carrying medium may pass through the condenser (12) first and then the absorber (22) or may pass through the absorber (22) first and then the condenser (12).
The rectifier (11) may also be used to heat the solution output by the solution pump (23) or to heat a heat transfer medium.
When the rectifier (11) is also used for heating the heat-carrying medium, the outdoor unit (4) is connected with the condenser (12), the rectifier (11) and the absorber (22) in any sequence through a first valve (9-1) and then is connected with the heat-carrying medium pump (8).
When the rectifier (11) is also used for heating the solution output by the solution pump (23), the solution pump (23) is connected with the generator (10) after being connected with the intermediate absorber (20) and the rectifier (11) in any sequence.
The absorption unit (3) may further include a heat carrier preheater (25), the heat carrier preheater (25) is used to preheat a heat carrier and recover flue gas generated by the boiler unit, the outdoor unit (4) is connected to the heat carrier preheater (25), the condenser (12) and the absorber (22) in any order through a first valve (9-1), and then is connected to a heat carrier pump (8), and the boiler unit is connected to the intermediate evaporator (14) and the heat carrier preheater (25) in any order.
It should be noted that the absorption unit (3) may further include a solution preheater (24), the solution preheater (24) is used for preheating the solution output by the solution pump (23) and recovering the flue gas generated by the boiler unit, the solution pump (23) is connected with the generator (10) after being connected with the intermediate absorber (20) and the solution preheater (24) in any order, and the boiler unit is connected with the solution preheater (24) and the intermediate evaporator (14) in any order.
Further, the heat carrier preheater (25) and the solution preheater (24) may be simultaneous, with flue gas generated by the boiler unit passing through the intermediate evaporator (14), the solution preheater (24) and the heat carrier preheater (25) in any order.
It should be noted that, when the rectifier (11) is further used for heating the heat carrier and the absorption unit (3) further comprises a heat carrier preheater (25), the outdoor unit (4) is connected with the heat carrier preheater (25), the rectifier (11), the condenser (12) and the absorber (22) in any order through the first valve (9-1) and then connected with the heat carrier pump (8).
It should be noted that, when the rectifier (11) is further used for heating the solution output by the solution pump (23), and the absorption unit (3) further comprises a solution preheater (24), the solution pump (23) is connected with the generator (10) after being connected with the solution preheater (24), the intermediate absorber (20) and the rectifier (11) in any sequence.
It should be noted that the absorption unit (3) may further include a subcooler (16), the subcooler (16) may be used to perform a subcooling process on the condensate generated by the condenser (12), the subcooler (16) may be used to perform a heat recovery process on the ammonia vapor output by the evaporator (18), and the subcooler (16) may be used to perform a subcooling process on the liquid ammonia output by the separator (15).
The following description is made in terms of various embodiments, and only the differences between the embodiments will be described, while the rest of the description will be referred to above.
Example 1
Referring to fig. 1, exemplarily, an outdoor unit (4), a first valve (9-1), a condenser (12), an absorber (22), and a heat carrier pump (8) are sequentially connected to perform a heat carrier step heating process, and the temperature of the heat carrier is gradually increased to become a heat carrier S5, and the heat carrier enters a combined cooling and heating unit.
Rectifier (11) still is used for heating the solution of solution pump (23) output, solution pump (23), rectifier (11), middle absorber (20) and generator (10) connect gradually, the concentrated solution after the pressure boost passes through rectifier (11) and middle absorber (20) in proper order, carry out solution step heating process, the temperature risees gradually and finally gets into generator (10).
Example 2
Referring to fig. 2, exemplarily, the outdoor unit (4), the first valve (9-1), the condenser (12), the absorber (22) and the heat carrier pump (8) are sequentially connected to perform a heat carrier step heating process, and the temperature gradually increases to become a heat carrier S5, and enters the combined cooling and heating unit.
The rectifier (11) is also used for heating the solution output by the solution pump (23), the intermediate absorber (20), the rectifier (11) and the generator (10) are sequentially connected, the pressurized concentrated solution sequentially passes through the intermediate absorber (20) and the rectifier (11) to perform a solution step heating process, and the temperature gradually rises and finally enters the generator (10).
Example 3
Referring to fig. 3, exemplarily, the outdoor unit (4), the first valve (9-1), the absorber (22), the condenser (12) and the heat-carrying medium pump (8) are sequentially connected, and the heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, sequentially passes through the absorber (22) and the condenser (12), performs a heat-carrying medium step heating process, and gradually increases in temperature to become the heat-carrying medium S5, and enters the combined cooling and heating unit.
Rectifier (11) still is used for heating the solution of solution pump (23) output, solution pump (23), rectifier (11), middle absorber (20) and generator (10) connect gradually, the concentrated solution after the pressure boost passes through rectifier (11) and middle absorber (20) in proper order, carry out solution step heating process, the temperature risees gradually and finally gets into generator (10).
Example 4
Referring to fig. 4, exemplarily, an outdoor unit (4), a first valve (9-1), an absorber (22), a condenser (12) and a heat-carrying medium pump (8) are sequentially connected, a heat-carrying medium S6 enters an absorption unit (3) from a combined cooling and heating unit, passes through the absorber (22) and the condenser (12) in sequence, and performs a heat-carrying medium step heating process, so that the temperature gradually increases to become a heat-carrying medium S5, and enters the combined cooling and heating unit.
The rectifier (11) is also used for heating the solution output by the solution pump (23), the intermediate absorber (20), the rectifier (11) and the generator (10) are sequentially connected, the pressurized concentrated solution sequentially passes through the intermediate absorber (20) and the rectifier (11) to perform a solution step heating process, and the temperature gradually rises and finally enters the generator (10).
Example 5
Referring to fig. 5, the rectifier (11) is further used for heating the heat carrier, and the outdoor unit (4), the first valve (9-1), the condenser (12), the rectifier (11), the absorber (22) and the heat carrier pump (8) are connected in sequence. The heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, passes through the condenser (12), the rectifier (11) and the absorber (22) in sequence, carries out the step heating process of the heat-carrying medium, and the temperature is gradually increased to become the heat-carrying medium S5 and enters the combined cooling and heating unit.
Example 6
Referring to fig. 6, the rectifier (11) is further used for heating the heat carrier, and the outdoor unit (4), the first valve (9-1), the absorber (22), the condenser (12), the rectifier (11) and the heat carrier pump (8) are connected in sequence. The heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, passes through the absorber (22) and the condenser (12) in sequence, carries out the heat-carrying medium step heating process, and the temperature is gradually increased to become the heat-carrying medium S5 and enters the combined cooling and heating unit.
Example 7
Referring to fig. 7, the absorption unit (3) further includes a heat carrier preheater (25), the outdoor unit (4), the first valve (9-1), the heat carrier preheater (25), the condenser (12), the absorber (22), and the heat carrier pump (8) are sequentially connected, and the boiler unit, the intermediate evaporator (14), and the heat carrier preheater (25) are sequentially connected.
The heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, passes through the heat-carrying medium preheater (25), the condenser (12) and the absorber (22) in sequence, carries out the step heating process of the heat-carrying medium, and the temperature is gradually increased to become the heat-carrying medium S5 and enters the combined cooling and heating unit.
The flue gas F2 sequentially passes through the intermediate evaporator (14) and the heat-carrying medium preheater (25) to carry out a waste heat step recovery process, the temperature is gradually reduced to form flue gas F3 and the flue gas is discharged out of the system, and therefore flue gas circulation is completed.
Example 8
Referring to fig. 8, the absorption unit (3) further includes a heat carrier preheater (25), the rectifier (11) is further configured to heat the heat carrier, the outdoor unit (4), the first valve (9-1), the heat carrier preheater (25), the condenser (12), the rectifier (11), the absorber (22), and the heat carrier pump (8) are sequentially connected, and the boiler unit, the intermediate evaporator (14), and the heat carrier preheater (25) are sequentially connected.
The heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, preferably passes through a heat-carrying medium preheater (25), a condenser (12), a rectifier (11) and an absorber (22) in sequence, carries out the step heating process of the heat-carrying medium, and gradually increases the temperature to become the heat-carrying medium S5 and enters the combined cooling and heating unit.
The flue gas F2 preferably passes through the intermediate evaporator (14) and the heat-carrying medium preheater (25) in sequence to carry out a waste heat step recovery process, the temperature is gradually reduced to form flue gas F3, and the flue gas is discharged out of the system, so that the flue gas circulation is completed.
Example 9
Referring to fig. 9, the absorption unit (3) further includes a solution preheater (24), the outdoor unit (4), the first valve (9-1), the condenser (12), the absorber (22) and the heat-carrying medium pump (8) are sequentially connected, the rectifier (11) is further configured to heat the solution from the solution pump (23), the rectifier (11), the intermediate absorber (20), the solution preheater (24) and the generator (10) are sequentially connected, and the boiler unit, the solution preheater (24) and the intermediate evaporator (14) are sequentially connected.
The pressurized concentrated solution passes through a rectifier (11), an intermediate absorber (20) and a solution preheater (24) in sequence to carry out a solution step heating process, the temperature is gradually increased, and finally the solution enters a generator (10).
The flue gas F2 sequentially passes through the solution preheater (24) and the intermediate evaporator (14) to carry out a waste heat step recovery process, and the flue gas F3 is formed after the temperature is gradually reduced and is discharged out of the system, so that the flue gas circulation is completed.
Example 10
Referring to fig. 10, the absorption unit (3) further includes a solution preheater (24), the rectifier (11) is further configured to heat a heat-carrying medium, the outdoor unit (4), the first valve (9-1), the condenser (12), the rectifier (11) and the absorber (22) are sequentially connected, the solution pump (23), the intermediate absorber (20), the solution preheater (24) and the generator (10) are sequentially connected, and the boiler unit connection, the solution preheater (24) and the intermediate evaporator (14) are sequentially connected.
The pressurized concentrated solution passes through an intermediate absorber (20) and a solution preheater (24) in sequence to carry out a solution step heating process, the temperature is gradually increased, and finally the solution enters a generator (10).
The heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, passes through the condenser (12), the rectifier (11) and the absorber (22) in sequence, carries out the step heating process of the heat-carrying medium, and the temperature is gradually increased to become the heat-carrying medium S5 and enters the combined cooling and heating unit.
The flue gas F2 sequentially passes through the solution preheater (24) and the intermediate evaporator (14) to carry out the waste heat step recovery process, and the flue gas F3 is formed after the temperature is gradually reduced and is discharged out of the system, so that the flue gas circulation is completed.
Example 11
Referring to fig. 11, for example, the absorption unit (3) further includes a subcooler (16), a solution preheater (24) and a heat-carrying medium preheater (25), a liquid outlet of the separator (15) is sequentially connected with the working medium secondary throttle valve (17) and the evaporator (18) through the subcooler (16), the evaporator (18) is connected with the absorber (22) through the subcooler (16), the rectifier (11) is further used for heating the solution output by the solution pump (23), the rectifier (11), the intermediate absorber (20), the solution preheater (24) and the generator (10) are sequentially connected, the outdoor unit (4), the first valve (9-1), the heat-carrying medium preheater (25), the condenser (12), the absorber (22) and the heat-carrying medium pump (8) are sequentially connected, and the boiler unit is connected, the solution preheater (24) and the heat-carrying medium preheater (8), The intermediate evaporator (14) and the heat-carrying medium preheater (25) are connected in sequence.
The ammonia steam that generator (10) produced gets into rectifier (11) and carries out the rectification process, and the reflux that produces gets into generator (10), and the ammonia concentration of ammonia steam gets into condenser (12) after improving and carries out the condensation process, and the condensate that produces passes through get into intermediate evaporator (14) after working medium primary throttle valve (13) throttle, carries out partial evaporation process and gets into separator (15) carry out gas-liquid separation, and wherein ammonia steam gets into intermediate absorber (20), and liquid ammonia gets into subcooler (16), carries out subcooling process back temperature reduction, warp get into evaporimeter (18) after working medium secondary throttle valve (17) throttle, become ammonia steam after carrying out the evaporation process, get into subcooler (16), carry out backheat process back temperature rise to get into absorber (22).
The pressurized concentrated solution passes through a rectifier (11), an intermediate absorber (20) and a solution preheater (24) in sequence to carry out a solution step heating process, the temperature is gradually increased, and finally the solution enters a generator (10).
The heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, passes through the heat-carrying medium preheater (25), the condenser (12) and the absorber (22) in sequence, carries out the step heating process of the heat-carrying medium, and the temperature is gradually increased to become the heat-carrying medium S5 and enters the combined cooling and heating unit.
The flue gas F2 sequentially passes through the solution preheater (24), the intermediate evaporator (14) and the heat-carrying medium preheater (25), and is subjected to a waste heat step recovery process, and the temperature is gradually reduced to become flue gas F3 and is discharged out of the system, so that flue gas circulation is completed.
Example 12
Referring to fig. 12, for example, the absorption unit (3) further includes a subcooler (16), a solution preheater (24) and a heat-carrying medium preheater (25), a vapor outlet of the rectifier (11) is sequentially connected to the condenser (12), the subcooler (16), the working medium primary throttle valve (13), the intermediate evaporator (14) and the separator (15), a liquid outlet of the separator (15) is sequentially connected to the working medium secondary throttle valve (17), the evaporator (18), the subcooler (16) and the absorber (22), the rectifier (11) is further used for heating the solution output by the solution pump (23), the rectifier (11), the intermediate absorber (20), the solution preheater (24) and the generator (10) are sequentially connected, the outdoor unit (4), the first valve (9-1), the heat-carrying medium (25), the condenser (12), and the heat-carrying medium preheater (25), The absorber (22) and the heat-carrying medium pump (8) are connected in sequence, and the boiler unit connection, the solution preheater (24), the intermediate evaporator (14) and the heat-carrying medium preheater (25) are connected in sequence.
The ammonia steam that generator (10) produced gets into rectifier (11) and carries out the rectification process, and the reflux that produces gets into generator (10), and the ammonia concentration of ammonia steam gets into condenser (12) and carries out the condensation process after improving, and the condensate that produces gets into subcooler (16), temperature reduction after carrying out the subcooling process, warp get into intermediate evaporator (14) after working medium primary throttle valve (13) throttle, carry out partial evaporation process and get into separator (15) carry out gas-liquid separation, wherein ammonia steam gets into intermediate absorber (20), and liquid ammonia warp get into evaporimeter (18) after working medium secondary throttle valve (17) throttle, become ammonia steam after carrying out the evaporation process, get into subcooler (16), carry out the temperature rise after the regenerative process to get into absorber (22).
The pressurized concentrated solution passes through a rectifier (11), an intermediate absorber (20) and a solution preheater (24) in sequence to carry out a solution step heating process, the temperature is gradually increased, and finally the solution enters a generator (10).
The heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, passes through the heat-carrying medium preheater (25), the condenser (12) and the absorber (22) in sequence, carries out the step heating process of the heat-carrying medium, and the temperature is gradually increased to become the heat-carrying medium S5 and enters the combined cooling and heating unit.
The flue gas F2 sequentially passes through the solution preheater (24), the intermediate evaporator (14) and the heat-carrying medium preheater (25) to carry out a waste heat step recovery process, and the temperature is gradually reduced to become flue gas F3 and is discharged out of the system, so that the flue gas circulation is completed.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (18)
1. An absorption type combined cooling and heating system with an intermediate process is characterized by comprising a boiler unit, an absorption type unit and a combined cooling and heating unit; the absorption unit comprises a generator, a rectifier, a condenser, a working medium primary throttle valve, an intermediate evaporator, a separator, a working medium secondary throttle valve, an evaporator, a solution primary throttle valve, an intermediate absorber, a solution secondary throttle valve, an absorber and a solution pump; the combined cooling and heating unit comprises an outdoor unit, an indoor cooling machine, an indoor heating machine, a cold carrying medium pump, a heat carrying medium pump and a valve group;
a heat source medium outlet of the boiler unit is connected with a heat source medium inlet of the generator, a heat source medium outlet of the generator is connected with a heat source medium inlet of the boiler unit, and the boiler unit is also connected with an intermediate evaporator;
the steam outlet of the generator is connected with the steam inlet of the rectifier, the return port of the rectifier is connected with the return port of the generator, the steam outlet of the rectifier is sequentially connected with the condenser, the working medium primary throttling valve, the intermediate evaporator and the separator, the gas outlet of the separator is connected with the intermediate absorber, the liquid outlet of the separator is sequentially connected with the working medium secondary throttling valve, the evaporator and the absorber, the solution outlet of the generator is sequentially connected with the primary throttling valve, the intermediate absorber, the solution secondary throttling valve, the absorber and the solution pump, and the solution pump is connected with the generator through the intermediate absorber;
the valve group comprises a first valve, a second valve, a third valve, a fourth valve, a fifth valve and a sixth valve, the outdoor unit is connected with the condenser and the absorber in any sequence through the first valve and then is connected with the heat-carrying medium pump, a first outlet of the heat-carrying medium pump is connected with the outdoor unit through the fifth valve, a second outlet of the heat-carrying medium pump is connected with the indoor heat supply machine through the sixth valve, and the indoor heat supply machine is connected with the absorber; the outdoor unit is sequentially connected with the evaporator and the cold-carrying medium pump through the second valve, a first outlet of the cold-carrying medium pump is connected with the outdoor unit through the fourth valve, a second outlet of the cold-carrying medium pump is connected with the indoor cold supply machine through the third valve, and the indoor cold supply machine is connected with the evaporator; the combined cooling and heating unit is used for cooling, the first valve, the third valve and the fifth valve are opened, and the second valve, the fourth valve and the sixth valve are closed; the cold and hot combined supply unit is used for supplying heat, the second valve, the fourth valve and the sixth valve are opened, and the first valve, the third valve and the fifth valve are closed.
2. An absorption chiller-heater co-generation system with an intermediate process as claimed in claim 1, wherein said boiler unit comprises a boiler and a heat source medium pump, and heat energy generated by said boiler is transferred to said generator by said heat source medium pump.
3. An absorption chiller-heater cogeneration system with intermediate processes according to claim 1, wherein said outdoor unit, said first valve, said condenser, said absorber and said heat carrier pump are connected in series; or
The outdoor unit, the first valve, the absorber, the condenser and the heat-carrying medium pump are connected in sequence.
4. The absorption chiller-heater cogeneration system with intermediate process according to claim 1, wherein said rectifier is further configured to heat a heat carrier, and said outdoor unit is connected to said condenser, said rectifier and said absorber in any order through said first valve and then connected to said heat carrier pump.
5. The absorption chiller-heater cogeneration system with intermediate process of claim 4, wherein said outdoor unit, said first valve, said condenser, said rectifier, said absorber and said heat carrier pump are connected in series; or
The outdoor unit, the first valve, the absorber, the condenser, the rectifier and the heat-carrying medium pump are connected in sequence.
6. An absorption chiller-heater with an intermediate process according to claim 4, wherein said absorption unit further comprises a heat carrier preheater, said outdoor unit is connected to said heat carrier preheater, said condenser, said rectifier and said absorber in any order through said first valve and then connected to said heat carrier pump, and said boiler unit is connected to said intermediate evaporator and said heat carrier preheater in any order.
7. An absorption chiller-heater with intermediate process according to claim 6, wherein said outdoor unit, said first valve, said heat carrier preheater, said condenser, said rectifier, said absorber and said heat carrier pump are connected in sequence, and said boiler unit connection, said intermediate evaporator and said heat carrier preheater are connected in sequence; or
The outdoor unit, the first valve, the heat-carrying medium preheater, the condenser, the rectifier, the absorber and the heat-carrying medium pump are sequentially connected, and the boiler unit connection, the intermediate evaporator and the heat-carrying medium preheater are sequentially connected.
8. An absorption chiller-heater with intermediate process according to claim 4, wherein said absorption unit further comprises a solution preheater, said solution pump is connected to said intermediate absorber and said solution preheater in any order and then connected to said generator, and said boiler unit is connected to said solution preheater and said intermediate evaporator in any order.
9. An absorption chiller-heater with intermediate process according to claim 1, wherein said absorption unit further comprises a heat carrier preheater, said outdoor unit is connected to said heat carrier preheater, said condenser and said absorber in any order through said first valve and then connected to said heat carrier pump, and said boiler unit is connected to said intermediate evaporator and said heat carrier preheater in any order.
10. The absorption chiller-heater co-generation system with intermediate process according to claim 1, wherein the rectifier is further configured to heat the solution output from the solution pump, and the solution pump is connected to the generator after connecting the rectifier and the intermediate absorber in any order.
11. The absorption chiller-heater co-generation system with intermediate process according to claim 10, wherein the solution pump, the intermediate absorber, the rectifier, and the generator are connected in sequence; or
The solution pump, the rectifier, the intermediate absorber and the generator are connected in sequence.
12. An absorption chiller-heater with intermediate process according to claim 10, wherein said absorption unit further comprises a solution preheater, said solution pump is connected to said generator after connecting said rectifier, said intermediate absorber and said solution preheater in any order, and said boiler unit is connected to said solution preheater and said intermediate evaporator in any order.
13. The absorption chiller-heater co-generation system with an intermediate process of claim 1, wherein the absorption unit further comprises a subcooler, the liquid outlet of the separator is connected to the working medium secondary throttle valve and the evaporator in sequence through the subcooler, and the evaporator is connected to the absorber through the subcooler.
14. An absorption chiller-heater with intermediate process according to claim 13, wherein said absorption unit further comprises a solution preheater and a heat carrier preheater, said rectifier further is configured to heat the solution output from said solution pump, said solution pump is connected to said generator after connecting said rectifier, said intermediate absorber and said solution preheater in any order, said outdoor unit is connected to said heat carrier preheater, said condenser and said absorber in any order through said first valve, and said boiler unit is connected to said solution preheater, said intermediate evaporator and said heat carrier preheater in any order.
15. The absorption chiller-heater co-generation system with an intermediate process of claim 1, wherein the absorption unit further comprises a subcooler, a vapor outlet of the rectifier is connected to the condenser, the subcooler, the working medium primary throttle valve, the intermediate evaporator and the separator in sequence, and a liquid outlet of the separator is connected to the working medium secondary throttle valve, the evaporator, the subcooler and the absorber in sequence.
16. An absorption chiller-heater with intermediate process according to claim 15, wherein said absorption unit further comprises a solution preheater and a heat carrier preheater, said rectifier further is configured to heat the solution output from said solution pump, said solution pump is connected to said generator after connecting said rectifier, said intermediate absorber and said solution preheater in any order, said outdoor unit is connected to said heat carrier preheater, said condenser, said absorber and said heat carrier pump in any order through said first valve, and said boiler unit is connected to said solution preheater, said intermediate evaporator and said heat carrier preheater in any order.
17. An absorption chiller-heater combined supply system with an intermediate process according to claim 1, wherein the chiller-heater combined supply unit further comprises a cold carrier storage tank and a heat carrier storage tank, the cold carrier storage tank being disposed between the evaporator and the cold carrier pump, the heat carrier storage tank being disposed between the absorber and the heat carrier pump.
18. The absorption chiller-heater with intermediate process according to claim 1, wherein the absorption chiller-heater with intermediate process uses at least one of water, ethylene glycol, alcohol, propylene glycol, methylene chloride, calcium chloride solution, and sodium chloride solution as a cooling medium or a heat carrier.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017040A (en) * | 2007-02-12 | 2007-08-15 | 庞启东 | Exhaust gas heat exchanger used in ammonia water absorption refrigeration device using residual heat of exhaust gas |
| CN101042272A (en) * | 2007-02-12 | 2007-09-26 | 庞启东 | Rectifier used in ammonia water absorption refrigeration device using exhaust gas waste heat |
| CN101135507A (en) * | 2007-09-21 | 2008-03-05 | 东南大学 | Ammonia water absorbing refrigerator |
| CN101196351A (en) * | 2007-12-21 | 2008-06-11 | 河南科技大学 | High-efficiency low-temperature absorptive refrigerating machine |
| CN102645050A (en) * | 2011-02-22 | 2012-08-22 | 中国科学院工程热物理研究所 | Ammonia water absorbing-type refrigeration system and method using concentration-adjustable working medium |
| CN203655375U (en) * | 2013-11-26 | 2014-06-18 | 上海成信建业节能科技有限公司 | Comprehensive utilization system for power plant waste heat recovery |
-
2021
- 2021-11-15 CN CN202111346634.9A patent/CN113899110B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017040A (en) * | 2007-02-12 | 2007-08-15 | 庞启东 | Exhaust gas heat exchanger used in ammonia water absorption refrigeration device using residual heat of exhaust gas |
| CN101042272A (en) * | 2007-02-12 | 2007-09-26 | 庞启东 | Rectifier used in ammonia water absorption refrigeration device using exhaust gas waste heat |
| CN101135507A (en) * | 2007-09-21 | 2008-03-05 | 东南大学 | Ammonia water absorbing refrigerator |
| CN101196351A (en) * | 2007-12-21 | 2008-06-11 | 河南科技大学 | High-efficiency low-temperature absorptive refrigerating machine |
| CN102645050A (en) * | 2011-02-22 | 2012-08-22 | 中国科学院工程热物理研究所 | Ammonia water absorbing-type refrigeration system and method using concentration-adjustable working medium |
| CN203655375U (en) * | 2013-11-26 | 2014-06-18 | 上海成信建业节能科技有限公司 | Comprehensive utilization system for power plant waste heat recovery |
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