CN112902272A - Flue gas waste heat recovery and heat pump combined operation system, operation method and calculation method - Google Patents
Flue gas waste heat recovery and heat pump combined operation system, operation method and calculation method Download PDFInfo
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- CN112902272A CN112902272A CN202110124574.XA CN202110124574A CN112902272A CN 112902272 A CN112902272 A CN 112902272A CN 202110124574 A CN202110124574 A CN 202110124574A CN 112902272 A CN112902272 A CN 112902272A
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- 239000002918 waste heat Substances 0.000 title claims abstract description 135
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000003546 flue gas Substances 0.000 title claims abstract description 57
- 238000011084 recovery Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004364 calculation method Methods 0.000 title abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 622
- 238000000605 extraction Methods 0.000 claims abstract description 34
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 28
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000006477 desulfuration reaction Methods 0.000 claims description 24
- 230000023556 desulfurization Effects 0.000 claims description 24
- 239000002002 slurry Substances 0.000 claims description 22
- 239000008400 supply water Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D12/00—Other central heating systems
- F24D12/02—Other central heating systems having more than one heat source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1012—Arrangement or mounting of control or safety devices for water heating systems for central heating by regulating the speed of a pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1091—Mixing cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/32—Heat sources or energy sources involving multiple heat sources in combination or as alternative heat sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/04—Sensors
- F24D2220/042—Temperature sensors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/04—Sensors
- F24D2220/044—Flow sensors
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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
- 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]
-
- 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]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention relates to a flue gas waste heat recovery and heat pump combined operation system, an operation method and a calculation method, and belongs to the technical field of energy. In order to solve the problems that the existing hot water driven heat pump and the existing flue gas waste heat recovery are mutually influenced and difficult to adjust, the invention provides a flue gas waste heat recovery and heat pump combined operation system, an operation method and a calculation method. The operation system comprises: heat supply pipe network, boiler, heat pump set, muddy hydrophone, controller, waste heat extraction device and desulfurizing tower. The invention is suitable for a hot water boiler and can better realize the recovery of the waste heat of the flue gas, the data measured by the temperature sensor and the flow sensor arranged on the pipeline are transmitted to the controller, and the obtained signals are processed by the controller, so that the data of the heat supply amount of the system, the driving hot water flow of the heat pump unit, the heating amount of the heat pump unit, the heat supply amount of the hot water boiler and the like can be observed in real time. The controller controls the water pump and the regulating valve to realize real-time regulation.
Description
Technical Field
The invention belongs to the technical field of hot water boilers, and particularly relates to a flue gas waste heat recovery and heat pump combined operation system, an operation method and a calculation method.
Background
At present, the existing flue gas waste heat recovery difficulty for a hot water boiler is high, wherein the existing flue gas waste heat recovery difficulty mainly relates to a driving heat source of a heat pump, a common absorption heat pump is driven by steam, and the hot water boiler has no steam source and is only suitable for being driven by hot water. The hot water boiler is required to have higher outlet water temperature by using hot water driving, and the stable driving hot water temperature and flow are kept, so that higher requirements are provided for the hot water boiler, the operation load of the hot water boiler influences the size of smoke gas quantity, influences the size of recovered waste heat quantity, influences the size of driving heat quantity, and simultaneously relates to the change and adjustment of boiler flow, the whole system is mutually coupled and mutually influenced, and the adjustment is difficult.
Disclosure of Invention
In order to solve the problems that the existing hot water driven heat pump and the existing flue gas waste heat recovery are mutually influenced and difficult to adjust, the invention provides a flue gas waste heat recovery and heat pump combined operation system, an operation method and a calculation method.
The technical scheme of the invention is as follows:
flue gas waste heat recovery and heat pump combined operation system includes: the heat supply system comprises a heat supply pipe network, a hot water boiler, a heat pump unit, a water mixer, a controller, a waste heat extraction device and a desulfurization tower, wherein one end of a heat supply network water return pipeline is connected with the heat supply pipe network, the other end of the heat supply network water return pipeline is divided into two branches of a heat supply network water return bypass pipeline and a boiler water inlet pipeline, one end of the heat supply network water return pipeline is connected with the water inlet end of the hot water boiler, the other end of the heat supply network water return pipeline is connected with the water inlet end of the water mixer, the water outlet end of the hot water boiler is connected with one end of a boiler water outlet pipeline, the other end of the boiler water outlet pipeline is divided into two branches of a boiler water outlet pipeline and a heat pump unit driving hot water inlet pipeline, the boiler water outlet pipeline is connected with the water inlet end of the water mixer, the heat pump unit driving hot water inlet pipeline, the water outlet end of the water mixer is connected with a heat supply network water supply pipeline, and the water inlet end and the water outlet end of the heat pump unit are respectively connected with a main path of a heat supply network water return pipeline through a heat pump unit heat supply network water supply pipeline and a heat pump unit heat supply network water outlet pipeline;
the hot water boiler is connected with the air inlet end of the desulfurizing tower through a first flue gas pipeline, the air outlet end of the desulfurizing tower is connected with the chimney through a desulfurizing tower outlet flue gas pipeline, the slurry outlet and the slurry inlet of the desulfurizing tower are respectively connected with the slurry inlet and the slurry outlet of the waste heat extraction device through a desulfurizing slurry outlet pipeline and a desulfurizing slurry inlet pipeline, and the water outlet end and the water inlet end of the waste heat extraction device are respectively connected with the water inlet end and the water outlet end of the heat pump unit through a heat pump unit waste heat water inlet pipeline and a heat pump unit waste heat water outlet pipeline;
a heat supply network backwater temperature sensor and a heat supply network backwater flow sensor are arranged on a main path of the heat supply network backwater pipeline, a temperature sensor after mixing of heat supply network backwater and heat pump effluent is arranged on an intermediate section of the heat supply network backwater pipeline, a heat supply network backwater bypass pipeline joint and a heat supply network water outlet pipeline joint, a boiler inlet water flow sensor is arranged on the boiler inlet pipeline, a boiler outlet water temperature sensor is arranged on the boiler outlet pipeline, a boiler outlet water inlet water mixer flow sensor is arranged on the water mixer pipeline, a heat supply network driving hot water flow sensor and a heat pump driving hot water pipeline regulating valve are arranged on the heat supply network driving hot water inlet pipeline, a heat supply network driving hot water temperature sensor is arranged on the heat supply network driving hot water outlet pipeline, the system comprises a heat pump unit, a heat pump unit and a heat pump unit, wherein a heat supply network backwater bypass pipeline regulating valve and a heat supply network backwater bypass flow sensor are arranged on a heat supply network backwater bypass pipeline;
the heat pump unit comprises a heat supply network backwater temperature sensor, a heat supply network water supply temperature sensor, a heat pump unit heat supply network water outlet temperature sensor, a heat pump unit heat supply network water inlet temperature sensor, a heat pump unit residual heat water outlet temperature sensor, a heat supply network backwater and heat pump water outlet mixed temperature sensor, a boiler water outlet temperature sensor, a heat pump unit driving hot water outlet temperature sensor and a heat supply network backwater flow sensor, the heat supply network backwater bypass flow sensor, the heat pump unit heat supply network water outlet flow sensor, the boiler water inlet flow sensor, the heat pump unit driving hot water flow sensor, the boiler entering water mixer flow sensor, the heat pump unit residual heat water flow sensor, the heat pump unit heat supply network water pressurizing water pump, the heat pump unit residual heat water circulating water pump, the heat supply network backwater bypass pipeline regulating valve and the heat pump driving hot water pipeline regulating valve are respectively connected with the controller.
The operation method of the flue gas waste heat recovery and heat pump combined operation system is characterized in that return water of a heat supply network system enters from a return water pipeline of the heat supply network, and flow and temperature signals detected by a return water flow sensor of the heat supply network and a temperature sensor are transmitted to a controller; a part of water in the heat supply network water return pipeline enters a heat supply network water inlet pipeline of the heat pump unit, and the flow of the water is adjusted by a heat supply network water booster water pump of the heat pump unit according to the instruction of a controller; a temperature signal detected by a heat pump unit heat supply network inlet water temperature sensor on a heat pump unit heat supply network inlet pipeline is transmitted to a controller, heat supply network water is heated by the heat pump unit and then is sent back to a heat supply network return water pipeline by a heat pump unit heat supply network outlet pipeline and is mixed with original heat supply network water in the heat supply network return water pipeline, flow and temperature signals detected by the heat pump unit heat supply network outlet water temperature sensor and the heat pump unit heat supply network outlet water flow sensor on the heat pump unit heat supply network outlet pipeline are transmitted to the controller, the mixed heat supply network return water temperature is transmitted to the controller by the temperature signal detected by the temperature sensor after mixing heat supply network return water and heat pump outlet water, partial flow of the mixed heat supply network return water enters a water mixer by a heat supply network return water bypass pipeline, a heat supply network return water bypass pipeline adjusting valve on the heat supply network return water bypass pipeline is connected with an instruction, the rest return water of the heat supply network enters the hot water boiler through a boiler water inlet pipeline for heating, a boiler water inlet flow sensor on the boiler water inlet pipeline detects a flow signal and transmits the flow signal to a controller, the heat supply network water enters a boiler water outlet pipeline after being heated in the hot water boiler, a boiler water outlet temperature sensor on the boiler water outlet pipeline detects a temperature signal and transmits the temperature signal to the controller, the boiler water respectively enters a boiler water outlet pipeline and enters a water mixer pipeline and a heat pump set driving hot water inlet pipeline, the flow signal detected by the boiler water inlet flow sensor when the boiler water enters the water mixer pipeline is transmitted to the controller, a heat pump driving hot water pipeline adjusting valve on the heat pump set driving hot water inlet pipeline is connected with an instruction of the controller for adjusting, and the heat pump set on the heat pump set driving hot water inlet pipeline drives a flow signal detected, the temperature of the hot water is reduced after the hot water is driven to enter a heat pump unit, the hot water enters a hot water outlet pipeline driven by the heat pump unit, the heat pump unit drives a hot water outlet temperature sensor on the hot water outlet pipeline to detect a temperature signal and transmit the temperature signal to a controller, the driven hot water drives the hot water outlet pipeline by the heat pump unit and enters a water mixer, the boiler water, the hot water driven by the heat pump unit and the by-pass hot network backwater are mixed in the water mixer and enter a hot network water supply pipeline and are supplied to a hot network, the temperature signal detected by the hot network water supply temperature sensor on the hot network water supply pipeline is transmitted to the controller, the residual hot water in the waste heat extraction device enters the heat pump unit from a residual hot water inlet pipeline of the heat pump unit, the temperature signal and the flow signal detected by the residual hot water inlet temperature sensor and, the waste heat water enters the heat pump unit and a hot water outlet pipeline after being cooled in the heat pump unit, a waste heat water circulating pump of the heat pump unit is driven into a waste heat extraction device, the waste heat water circulating pump of the heat pump unit is adjusted by an instruction of a controller, and a temperature signal detected by a waste heat water outlet temperature sensor of the heat pump unit on the waste heat water outlet pipeline of the heat pump unit is transmitted to the controller;
high-temperature flue gas produced by hot water boiler gets into the desulfurizing tower through first flue gas pipeline and carries out the desulfurization, flue gas temperature after the desulfurization reduces, and discharge into the chimney through desulfurizing tower export flue gas pipeline, the desulfurization thick liquid in the desulfurizing tower gets into waste heat extraction element through desulfurization thick liquid outlet pipe, the heat transfer in waste heat extraction element, the desulfurization thick liquid after the cooling gets into the desulfurizing tower through desulfurization thick liquid entry pipeline, heat pump set waste heat water inlet pipe in the waste heat extraction element, get into and cool off in the heat pump set, the waste heat water after the cooling gets into waste heat extraction element after being sent into heat pump set waste heat water outlet pipe way by heat pump set waste heat water circulating water pump.
A method for calculating system heat supply based on a flue gas waste heat recovery and heat pump combined operation system comprises the following steps:
Q＝F×(tg-th)×1.163
wherein: q is the system heat supply; f, measuring the flow of the heat supply network system by a heat supply network backwater flow sensor; t is tg-a heat supply network supply water temperature measured by a heat supply network supply water temperature sensor; t is thAnd the return water temperature of the heat supply network is measured by a return water temperature sensor of the heat supply network.
A method for calculating the hot water flow driven by a heat pump unit based on a flue gas waste heat recovery and heat pump combined operation system comprises the following steps:
Q3＝Q2/0.8
Q3＝F1×(tqg-tqh)×1.163
wherein: q3-heat pump unit drive heat; q2-the amount of waste heat; f1The heat pump unit drives the hot water flow, and the hot water flow is measured by a hot water flow sensor driven by the heat pump unit; t is tqgThe hot water inlet temperature is driven by a heat pump unit and is measured by a boiler outlet water temperature sensor; t is tqhAnd driving the hot water outlet temperature by the heat pump unit, and measuring by the hot water outlet temperature sensor driven by the heat pump unit.
A method for calculating the heating capacity of a heat pump unit based on a flue gas waste heat recovery and heat pump combined operation system comprises the following steps:
Q4＝F2×(trg-trh)×1.163
wherein: q4-heating by a heat pump unit; q2-the amount of waste heat; f2-heat pump set heat supply network water flow, measured by a heat pump set heat supply network water outlet flow sensor; t is trgThe outlet water temperature of the heat supply network of the heat pump unit is measured by a sensor for the outlet water temperature of the heat supply network of the heat pump unit; t is trh: and the water inlet temperature of the heat pump unit heat supply network is measured by a water inlet temperature sensor of the heat pump unit heat supply network.
A method for calculating the heat supply capacity of a hot water boiler based on a flue gas waste heat recovery and heat pump combined operation system comprises the following steps:
Q1＝F3×(tg3-th1)×1.163
wherein Q is1-heat supply from hot water boilers; f3-boiler feed water flow, measured by a boiler feed water flow sensor; t is tg3Temperature of the hot water boiler outlet, measured by a boiler outlet temperature sensor, th1And the mixed temperature of the return water of the heat supply network is measured by a temperature sensor after the return water of the heat supply network is mixed with the outlet water of the heat pump.
A method for calculating the waste heat quantity based on a flue gas waste heat recovery and heat pump combined operation system comprises the following steps:
Q2＝F6×(tyg-tyh)×1.163
wherein: q2-the amount of waste heat; f6The flow of the waste heat water is measured by a heat pump unit waste heat sensor; t is tygThe temperature of the incoming water of the waste heat water is measured by a waste heat water inlet temperature sensor of the heat pump unit; t is tyhAnd measuring the return water temperature of the waste heat water by a waste heat water outlet temperature sensor of the heat pump unit.
A system heat supply amount calibration method based on a flue gas waste heat recovery and heat pump combined operation system comprises the following steps:
respectively, Q ═ F × (t) was calculatedg-th) X 1.163 and Q ═ Q1+Q2Judging whether the two are the same
Wherein: q is the system heat supply; f, measuring the flow of the heat supply network system by a heat supply network backwater flow sensor; t is tg-a heat supply network supply water temperature measured by a heat supply network supply water temperature sensor; t is thThe return water temperature of the heat supply network is measured by a return water temperature sensor of the heat supply network; q1: heat supply by hot water boiler; q2: the residual heat quantity.
The invention has the beneficial effects that:
1. the invention provides a flue gas waste heat recovery and heat pump combined operation system, which is suitable for a hot water boiler and can better realize flue gas waste heat recovery, the data measured by a temperature sensor and a flow sensor arranged on a pipeline are transmitted to a controller, and the obtained signals are processed by the controller, so that the data of system heat supply, heat pump unit driving hot water flow, heat pump unit heating capacity, hot water boiler heat supply capacity and the like can be observed in real time, the recovered boiler flue gas waste heat can be properly selected, and the operation working condition of the hot water boiler flue gas waste heat recovery and hot water driving heat pump combined operation system at any heat network return water temperature can be given. The controller controls the water pump and the regulating valve according to the data, so that real-time regulation is realized.
Drawings
FIG. 1 is a schematic view of the principle of the combined operation of a heat pump unit and a hot water boiler;
FIG. 2 is a schematic diagram of a principle of extracting the residual heat of the flue gas;
in the figure: 10. a heat supply pipe network; 11. a heat supply network water return pipeline; 12. a return water bypass pipeline of the heat supply network; 13. a boiler water inlet pipeline; 14. a boiler water outlet pipeline; 1401. the boiler enters a pipeline of a water mixer; 15. a heat supply network water supply line; 20. a hot water boiler; 30. A heat pump unit; 31. a heat pump unit heat supply network water inlet pipeline; 32. a heat pump unit heat supply network water outlet pipeline; 33. the heat pump unit drives a hot water inlet pipeline; 34. the heat pump unit drives a hot water outlet pipeline; 35. a waste heat water inlet pipeline of the heat pump unit; 36. a waste heat water outlet pipeline of the heat pump unit; 40. a water mixer; 50. a controller; 511. a return water temperature sensor of the heat supply network; 512. a heat supply network water supply temperature sensor; 513. a water outlet temperature sensor of a heat pump unit heat supply network; 514. a heat pump unit heat supply network inlet water temperature sensor; 515. a temperature sensor for the inflow of residual heat water of the heat pump unit; 516. a heat pump unit residual heat water outlet temperature sensor; 517. The temperature sensor 518 and the boiler outlet water temperature sensor after the return water of the heat supply network is mixed with the outlet water of the heat pump, and the 519 heat pump unit drives the hot water outlet water temperature sensor; 521. a heat supply network backwater flow sensor; 522. a return water bypass flow sensor of the heat supply network; 523. A heat pump unit heat supply network water outlet flow sensor; 524. a boiler inlet water flow sensor; 525. the heat pump unit drives the hot water flow sensor; 526. the boiler enters a water mixer flow sensor; 527. a heat pump unit residual heat water flow sensor; 531. a heat pump unit heat supply network water booster pump; 532. a heat pump unit residual heat water circulating water pump; 541. a heat supply network backwater bypass pipeline regulating valve; 542. the heat pump drives the hot water pipeline regulating valve; 21. a first flue gas duct; 22. a flue gas pipeline at the outlet of the desulfurizing tower; 60. a waste heat extraction device; 70. a desulfurizing tower; 71. a desulfurized slurry outlet conduit; 72. desulfurization slurry inlet pipeline.
Detailed Description
The technical solutions of the present invention are further described below with reference to the following examples, but the present invention is not limited thereto, and any modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Example 1
The principle schematic diagram of the combined operation of the heat pump unit and the hot water boiler is shown in fig. 1, and comprises the following components: the system comprises a heat supply pipe network 10, a hot water boiler 20, a heat pump unit 30, a water mixer 40 and a controller 50;
a1101 pipe section of a heat supply network return pipeline 11 of a heat supply network 10 is connected with a heat supply network water inlet pipeline 31 of a heat pump unit 30, a heat supply network water outlet pipeline 32 of the heat pump unit 30 is connected with a 1102 pipe section of the heat supply network return pipeline 11, one end of a heat supply network return bypass pipeline 12 is connected with a 1103 pipe section of the heat supply network return pipeline 11, the other end of the heat supply network return bypass pipeline is connected with a water mixer 40, one end of a boiler water inlet pipeline 13 is connected with an 1104 pipe section of the heat supply network return pipeline 11, the other end of the boiler water inlet pipeline is connected with a hot water boiler 20, the heat supply network return pipeline between heat supply network return water and the heat pump unit heat supply network water inlet pipeline 31 is the 1101 pipe section, the heat supply network return pipeline between the heat pump unit heat supply network water inlet pipeline 31 and the heat supply network water outlet pipeline 32 is the 1102 pipe section, the heat supply network return pipeline between the heat pump, one end of the boiler water outlet pipeline 14 is connected with the hot water boiler 20, the other end of the boiler water outlet pipeline is respectively connected with a boiler water outlet 1401 pipe section and a hot water inlet pipeline 33 driven by the heat pump unit, one end of the boiler water outlet 1401 pipe section is connected with the boiler water outlet pipeline 14, and the other end of the boiler water outlet 1401 pipe section is connected with the water mixer 40. One end of a hot water inlet pipeline 33 driven by the heat pump unit is connected with the boiler water outlet pipeline 14, the other end of the hot water inlet pipeline is connected with the heat pump unit 30, one end of a hot water outlet pipeline 34 driven by the heat pump unit is connected with the heat pump unit 30, and the other end of the hot water outlet pipeline is connected with a water mixer 40. One end of the waste heat water inlet pipeline 35 is connected with the heat pump unit 30, the other end of the waste heat water inlet pipeline is connected with the waste heat extraction device 60, one end of the waste heat water outlet pipeline 36 is connected with the heat pump unit 30, and the other end of the waste heat water outlet pipeline is connected with the waste heat extraction device 60. A temperature sensor 511 and a flow sensor 521 are installed on a 1101 pipe section of the return water of the heat supply network, and the temperature sensor 511 and the flow sensor 521 are installed and connected with the controller 50 through communication cables. A temperature sensor 517 is arranged on the 1103 pipe section, the temperature sensor 517 is connected with the controller 50 through a communication cable, a heat supply network booster pump 531 and a temperature sensor 514 are arranged on the heat supply network water inlet pipeline 31 of the heat pump unit, and the heat supply network booster pump 531 and the temperature sensor 514 are connected with the controller 50 through the communication cable. The heat pump unit heat supply network water outlet pipeline 32 is provided with a temperature sensor 513 and a flow sensor 523, and the temperature sensor 513 and the flow sensor 523 are connected with the controller 50 through communication cables. An adjusting valve 541 and a flow sensor 522 are installed on the heat supply network backwater bypass pipeline 12, and the adjusting valve 541 and the flow sensor 522 are connected with the controller 50 through communication cables. A flow sensor 524 is arranged on the boiler water inlet pipeline 13, a temperature sensor 518 is arranged on the boiler water outlet pipeline 14, and the flow sensor 524 and the temperature sensor 518 are connected with the controller 50 through communication cables. A flow sensor 526 is installed on the boiler inlet mixer pipe 1401, and the flow sensor 526 is connected with the controller 50 through a communication cable. The regulating valve 524 and the flow sensor 525 are installed on the hot water inlet pipe 33 driven by the heat pump unit, and the regulating valve 524 and the flow sensor 525 are connected with the controller 50 through a communication cable. The heat pump unit drives the hot water outlet pipeline 34 to be provided with a temperature sensor 519, the heat supply network water supply pipeline 15 is provided with a temperature sensor 512, and the temperature sensor 519 and the temperature sensor 512 are connected with the controller 50 through communication cables. A temperature sensor 515 and a flow sensor 527 are arranged on the residual heat water inlet pipeline 35 of the heat pump unit, and the temperature sensor 515 and the flow sensor 527 are connected with the controller 50 through communication cables. A temperature sensor 516 and a heat pump unit waste heat water circulating water pump 532 are installed on the heat pump unit waste heat water outlet pipeline 36, and the temperature sensor 516 and the heat pump unit waste heat water circulating water pump 532 are connected with the controller 50 through communication cables.
The schematic diagram of the extraction principle of the flue gas waste heat of the invention is shown in fig. 2, and comprises the following components: hot water boiler 20, heat pump unit 30, waste heat extraction device 60, desulfurizing tower 70.
One end of the first flue gas pipeline 21 is connected with the hot water boiler 20, and the other end is connected with the desulfurizing tower 70. One end of the flue gas pipeline 22 at the outlet of the desulfurizing tower is connected with the desulfurizing tower 70, and the other end is connected with a chimney. One end of the desulfurization slurry outlet pipeline 71 is connected with the desulfurization tower 70, and the other end is connected with the waste heat extraction device 60. One end of the desulfurization slurry inlet pipeline 72 is connected with the desulfurization tower 70, and the other end is connected with the waste heat extraction device 60. One end of the heat pump unit waste heat water inlet pipeline 35 is connected with the waste heat extraction device 60, and the other end is connected with the heat pump unit 30; one end of the heat pump unit waste heat water outlet pipeline 36 is connected with the waste heat extraction device 60, the other end of the heat pump unit waste heat water outlet pipeline 36 is connected with the heat pump unit 30, a temperature sensor 516 and a waste heat water circulating water pump 532 are installed on the heat pump unit waste heat water outlet pipeline 36, and the temperature sensor 516 and the heat pump unit waste heat water circulating water pump 532 are connected with the controller 50 through communication cables.
First, the working process
As shown in fig. 1: the return water of the heat supply network system enters from the return water pipeline 11 of the heat supply network, and the return water flow sensor 521 and the temperature sensor 511 of the heat supply network detect flow and temperature signals and transmit the flow and temperature signals to the controller 50. Part of the flow of the heat supply network water return 1101 pipe section enters a heat pump unit heat supply network water inlet pipeline 31, the flow of the heat supply network water inlet pipeline is adjusted by an instruction of a heat pump unit heat supply network booster pump 531 received by a controller 50, a temperature signal detected by a temperature sensor 514 on the heat pump unit heat supply network water inlet pipeline 31 is transmitted to the controller 50, heat supply network water is heated by a heat pump unit and then is transmitted to a heat supply network water return pipeline through a heat pump unit heat supply network water outlet pipeline 32, the heat supply network water return pipeline is mixed in a heat supply network water return pipeline 1103 pipe section, and flow and temperature signals detected by a flow sensor 523 and a temperature sensor 513. The temperature of the mixed return water of the heat supply network is detected by a temperature sensor 517, and is transmitted to the controller 50. The mixed partial flow of the return water of the heat supply network enters the water mixer 40 through the return water bypass pipeline 12 of the heat supply network, the regulating valve 541 and the flow sensor 522 are installed on the return water bypass pipeline 12 of the heat supply network, the regulating valve is regulated by an instruction of the controller 50, and a flow signal detected by the flow sensor 522 is transmitted to the controller 50. The return water of the heat supply network is bypassed at the section 1104, the rest return water of the heat supply network enters the boiler water inlet pipeline 13 and enters the hot water boiler 20 for heating, and a flow sensor 524 on the boiler water inlet pipeline 13 detects a flow signal and transmits the flow signal to the controller 50. The hot network water is heated in the hot water boiler 20 and enters the boiler outlet pipe 14, and the temperature sensor 518 on the boiler outlet pipe 14 detects a temperature signal and transmits the temperature signal to the controller 50. Boiler outlet water respectively enters a boiler inlet water mixer pipeline 1401 section and a hot water inlet pipeline 33 driven by a heat pump unit, and a flow signal detected by a flow sensor 526 on the pipeline 1401 section is transmitted to the controller 50. The regulating valve 542 on the hot water inlet pipe 33 driven by the heat pump unit receives the instruction from the controller 50 to regulate, and the flow signal detected by the flow sensor 525 on the hot water inlet pipe 33 driven by the heat pump unit is transmitted to the controller 50. After the hot water is driven to enter the heat pump unit 30, the temperature of the driven hot water is reduced, the driven hot water enters the heat pump unit driven hot water outlet pipeline 34, and the temperature sensor 519 on the heat pump unit driven hot water outlet pipeline 34 detects a temperature signal and transmits the temperature signal to the controller 50. The hot water after being driven enters the water mixer 40 through the hot water outlet pipeline 34 driven by the heat pump unit, the boiler outlet water, the hot water after being driven by the heat pump unit and the by-pass return water of the heat supply network are mixed in the water mixer 40, enter the water supply pipeline 15 of the heat supply network and are supplied to the heat supply network. A temperature sensor 512 on the network feed line 15 senses the temperature signal and sends it to the controller 50. The waste heat water in the waste heat extraction device 60 enters the heat pump unit 30 through the heat pump unit waste heat water inlet pipe 35, and the temperature sensor 515 and the flow sensor 527 on the heat pump unit waste heat water inlet pipe 35 detect a temperature signal and a flow signal and transmit the temperature signal and the flow signal to the controller 50. The waste heat water is cooled in the heat pump unit 30, and then enters the waste heat water outlet pipeline 36 of the heat pump unit, and is pumped into the waste heat extraction device 60 by the waste heat water circulating pump. The waste heat water circulating pump 532 on the waste heat water outlet pipeline 36 of the heat pump unit is adjusted by receiving the instruction of the controller 50; the temperature sensor 516 on the waste heat water outlet pipeline 36 of the heat pump unit detects a temperature signal and transmits the temperature signal to the controller 50.
As shown in fig. 2: the high temperature flue gas generated by the hot water boiler 20 enters the first flue gas pipeline 21 and then enters the desulfurizing tower 70 for desulfurization, the temperature of the desulfurized flue gas is reduced, and the flue gas enters the flue gas pipeline 22 and is discharged into a chimney. The desulfurization slurry in the desulfurization tower 70 enters the waste heat extraction device 60 through the slurry pipeline 71, heat is exchanged in the waste heat extraction device 60, and the cooled desulfurization slurry enters the desulfurization tower 70 through the slurry pipeline 72. The residual heat water in the residual heat extraction device 60 enters the residual heat water pipeline 35 and enters the heat pump unit 30 for cooling, and the cooled residual heat water is sent to the residual heat water pipeline 36 by the residual heat water circulating pump 532 and enters the residual heat extraction device 60. The waste heat water circulating pump 532 on the waste heat water outlet pipeline 36 of the heat pump unit is adjusted by receiving the instruction of the controller 50; the temperature sensor 516 on the waste heat water outlet pipeline 36 of the heat pump unit detects a temperature signal and transmits the temperature signal to the controller 50.
Second, calculating process
For convenience of describing the working process and principle, taking a 116MW hot water boiler as an example, the return water temperature of a heat supply network is 36-47 ℃, the water supply temperature of the heat supply network is 99 ℃, the COP (coefficient of performance) of a heat pump unit is 1.8, the driving hot water temperature is 110 ℃, and the driving hot water temperature is 95 ℃, so that the operating condition is simulated under the condition.
The waste heat recovery mode can adopt various modes such as spray heat exchange, slurry heat exchange and the like, and the slurry heat exchange is taken as an example for illustration.
The full-load recovery flue gas waste heat of a 116MW boiler is 6.32MW, the temperature of waste heat water is 39-32 ℃, the temperature difference of the waste heat water is kept unchanged, and the amount of the waste heat water is adjusted when the amount of the waste heat changes; the outlet water temperature of the boiler is kept unchanged at 110 ℃ to ensure the hot water driving effect, the outlet water temperature after the heat pump driving is kept at 95 ℃, and the driving flow is adjusted to adapt to the change when the residual heat quantity changes; the amount of waste heat is related to the boiler load and varies with the change of the boiler load.
Q＝Q1+Q2
Q2＝K1Q1
(Q: system heat supply amount; Q)1: heat supply by hot water boiler; q2: residual heat quantity; k1: boiler load ratio)
The return water temperature of the heat supply network and the boiler load also have a proportional relation, the supply and return water temperature of the heat supply network is changed with the change of the outdoor temperature, the change of the boiler load is further influenced, the return water temperature of the heat supply network is critical data influencing the system performance, and a relation curve of the return water temperature of the heat supply network and the boiler load can be obtained according to a general boiler room regulation curve.
Q1＝K2th+B
According to the return water temperature of the heat supply network of 36-47 ℃, the corresponding boiler load of 70-116MW can be obtained: k24.18, B-80.48, the relationship between the return water temperature of the heating network and the boiler load is given as:
Q1＝4.18th-80.48
the flow of the heat supply network system can be calculated according to the system load and the temperature of the supply water and the return water of the heat supply network:
Q＝F×(tg-th)×1.163
(F: heat supply network system flow, corresponding to the heat supply network return water flow sensor 521;
tg: a heat supply network water supply temperature sensor 512 corresponding to the heat supply network water supply temperature;
th: return water temperature of heat supply network corresponding to return water temperature sensor 511)
According to the heat pump unit COP1.8, the driving hot water flow of the heat pump unit can be calculated:
Q3＝Q2/0.8
Q3＝F1×(tqg-tqh)×1.163
(Q3: the heat pump unit drives heat;
F1: the heat pump units drive hot water flow, and the corresponding heat pump units drive the hot water flow sensor 525;
tqg: the heat pump unit drives the hot water inlet temperature corresponding to the boiler outlet temperature sensor 518;
tqh: the heat pump set drives the hot water outlet temperature, and the corresponding heat pump set drives the hot water outlet temperature sensor 519)
Heat pump set heating capacity and heat pump set heat supply network water flow:
Q4＝F2×(trg-trh)×1.163
(Q4: the heat pump unit heats;
F2: the heat pump set heat supply network water flow rate corresponds to the heat pump set heat supply network water outlet flow sensor 523;
trg: the outlet water temperature of the heat pump unit heat supply network corresponds to the outlet water temperature sensor 513 of the heat pump unit heat supply network;
trh: temperature of water inlet of heat pump set heat supply network, corresponding to temperature sensor 514)
The mixed temperature of the heat pump unit heat supply network outlet water and the heat supply network return water is as follows:
F2trg+(F-F2)th＝Fth1
(th1: temperature sensor 517 corresponding to temperature of mixed return water of heat supply network and mixed outlet water of heat pump
Flow rate of the hot water boiler:
Q1＝F3×(tg3-th1)×1.163
(F3: hot water boilerA boiler feed flow sensor 524;
tg3: water temperature sensor 518 for boiler outlet
Return water bypass flow of the heat supply network:
F4＝F-F3
(F4: return water bypass flow of heat supply network, corresponding return water bypass flow sensor 522)
The flow of the hot water boiler entering the water mixer is as follows:
F5＝F3-F1
(F5: flow sensor 526 for hot water boiler entering water mixer
Temperature of water supplied to heat supply network:
F5tg3+F1tg4+F4th1＝(F5+F1+F4)tg
(tg4: water outlet temperature sensor 519 driven by heat pump set corresponding to hot water outlet temperature driven by heat pump set
Residual heat water flow rate:
Q2＝F6×(tyg-tyh)×1.163
(F6: the residual heat water flow corresponds to a residual heat water flow sensor 527 of the heat pump unit;
tyg: the temperature of the incoming waste heat water corresponds to the temperature sensor 515 for the incoming waste heat water of the heat pump unit;
tyh: waste hot water return temperature corresponding to heat pump set waste hot water outlet temperature sensor 516)
And (3) checking the heat supply of the system:
Q＝F×(tg-th)×1.163
checking whether the heat supply of the system is as follows: q ═ Q1+Q2
Temperature t of water supplied to heat supply networkg4Flow F by-passing with return water of heat supply network4Has corresponding relation, the higher the water supply temperature of the heat supply network is, the smaller the bypass flow of the backwater of the heat supply network isHowever, temperature t of water supplied to heat supply networkg4By-pass flow F of return water of heat supply network4More than or equal to 0. Flow F into the hot water boiler3The maximum flow rate of the boiler is not more than the rated flow rate of the hot water boiler, and the actual operation flow rate is taken as the standard. The outlet water temperature of the hot water boiler should not exceed the rated water temperature of the hot water boiler, and the actual operation temperature is taken as the standard.
And properly selecting and recovering the residual heat of the boiler flue gas according to the limiting conditions.
According to the calculation method, the operation condition of the hot water boiler flue gas waste heat recovery and hot water driven heat pump combined operation system under any return water temperature of the heat supply network can be given.
The above description is only a preferred embodiment of the present invention, and these embodiments are based on different implementations of the present invention, and the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. Flue gas waste heat recovery and heat pump combined operation system, its characterized in that includes: the heat supply pipe network (10), the hot water boiler (20), the heat pump unit (30), the water mixer (40), the controller (50), the waste heat extraction device (60) and the desulfurization tower (70), wherein one end of a heat supply network return water pipeline (11) is connected with the heat supply pipe network (10), the other end of the heat supply network return water pipeline (11) is divided into two branches of a heat supply network return water bypass pipeline (12) and a boiler water inlet pipeline (13), the heat supply network return water bypass pipeline (12) is connected with the water inlet end of the hot water boiler (20), the boiler water inlet pipeline (13) is connected with the water inlet end of the water mixer (40), the water outlet end of the hot water boiler (20) is connected with one end of a boiler water outlet pipeline (14), the other end of the boiler water outlet pipeline (14) is divided into two branches of a boiler water outlet water inlet pipeline (1401) and a heat pump unit driving hot water inlet pipeline (33), the boiler water outlet water enters the water mixer pipeline (1401), the heat pump unit drives a hot water inlet pipeline (33) to be connected with a water inlet end of the heat pump unit (30), a water outlet end of the heat pump unit (30) drives a hot water outlet pipeline (34) to be connected with a water inlet end of a water mixer (40) through the heat pump unit, the water outlet end of the water mixer (40) is connected with a heat supply network water supply pipeline (15), and the water inlet end and the water outlet end of the water mixer (40) are respectively connected with a main circuit of a heat supply network water return pipeline (11) through a heat pump unit heat supply network water inlet pipeline (31) and a heat pump unit heat supply network water outlet pipeline (32);
the hot water boiler (20) is connected with the air inlet end of the desulfurizing tower (70) through a first flue gas pipeline (21), the air outlet end of the desulfurizing tower (70) is connected with a chimney through a desulfurizing tower outlet flue gas pipeline (22), a slurry outlet and a slurry inlet of the desulfurizing tower (70) are respectively connected with a slurry inlet and a slurry outlet of the waste heat extraction device (60) through a desulfurizing slurry outlet pipeline (71) and a desulfurizing slurry inlet pipeline (72), and the water outlet end and the water inlet end of the waste heat extraction device (60) are respectively connected with the water inlet end and the water outlet end of the heat pump unit (30) through a heat pump unit waste heat water inlet pipeline (35) and a heat pump unit and a hot water outlet pipeline (36);
the heat pump system is characterized in that a heat supply network return water temperature sensor (511) and a heat supply network return water flow sensor (521) are arranged on a main path of a heat supply network return water pipeline (11), a heat supply network return water temperature sensor (517) is arranged on the heat supply network return water pipeline (11) and is connected with a heat supply network return water bypass pipeline (12) and a heat pump set heat supply network outlet pipeline (32) in the middle section, boiler inlet water flow sensors (524) are arranged on a boiler inlet pipeline (13), a boiler outlet water temperature sensor (518) is arranged on a boiler outlet pipeline (14), a boiler inlet water mixer flow sensor (526) is arranged on a water mixer pipeline (33), a heat pump set driving hot water flow sensor (525) and a heat pump driving hot water pipeline regulating valve (542) are arranged on a heat pump set driving hot water outlet pipeline (34), and a heat pump set driving hot water outlet temperature sensor (1401) is arranged on a heat pump set driving hot water outlet pipeline Sensor (519), heat supply network water supply temperature sensor (512) has been arranged on heat supply network water supply pipeline (15), heat supply network return water bypass pipeline governing valve (541) and heat supply network return water by-pass flow sensor (522) have been arranged on heat supply network return water bypass pipeline (12), heat pump set heat supply network water booster pump (531) and heat pump set heat supply network water inlet temperature sensor (514) have been arranged on heat pump set heat supply network water inlet pipeline (31), heat pump set heat supply network outlet water temperature sensor (513) and heat pump set heat supply network outlet water flow sensor (523) have been arranged on heat pump set heat supply network outlet water pipeline (32), heat pump set waste heat water inlet temperature sensor (515) and heat pump set waste heat sensor (527) have been arranged on heat pump set waste heat water inlet pipeline (35), heat pump set has been arranged on heat pump set and hot water outlet pipeline (36) waste heat water outlet water temperature sensor (516) and heat pump set (ii) a
The system comprises a heat pump unit heat supply network backwater temperature sensor (511), a heat pump unit heat supply network water supply temperature sensor (512), a heat pump unit heat supply network water outlet temperature sensor (513), a heat pump unit heat supply network water inlet temperature sensor (514), a heat pump unit residual heat water inlet temperature sensor (515), a heat pump unit residual heat water outlet temperature sensor (516), a heat pump unit backwater and heat pump water outlet mixed temperature sensor (517), a boiler water outlet temperature sensor (518), a heat pump unit driving hot water outlet temperature sensor (519), a heat pump unit backwater flow sensor (521), a heat pump unit backwater bypass flow sensor (522), a heat pump unit heat supply network water outlet flow sensor (523), a boiler water inlet flow sensor (524), a heat pump unit driving hot water flow sensor (525), a boiler water inlet mixer flow sensor (526), a heat pump unit residual heat sensor (527), a heat pump, The waste heat water circulating water pump (532) of the heat pump unit, the heat supply network backwater bypass pipeline regulating valve (541) and the heat pump driving hot water pipeline regulating valve (542) are respectively connected with the controller (50).
2. An operation method of the flue gas waste heat recovery and heat pump combined operation system based on the claim 1 is characterized in that return water of a heat supply network of the heat supply network system enters from a return water pipeline (11) of the heat supply network, and flow and temperature signals detected by a return water flow sensor (521) and a temperature sensor (511) of the heat supply network are transmitted to a controller (50); a part of water in the heat supply network water return pipeline (11) enters a heat supply network water inlet pipeline (31) of the heat pump unit, and the flow of the water is adjusted by a heat supply network water booster water pump (531) of the heat pump unit by receiving an instruction of a controller (50); temperature signals detected by a heat pump unit heat supply network inlet water temperature sensor (514) on a heat pump unit heat supply network inlet pipeline (31) are transmitted to a controller (50), heat supply network water is heated by a heat pump unit (30) and then is sent back to a heat supply network return water pipeline (11) by a heat pump unit heat supply network outlet water pipeline (32) and is mixed with original heat supply network water in the heat supply network return water pipeline (11), flow and temperature signals detected by a heat pump unit heat supply network outlet water temperature sensor (513) on the heat pump unit heat supply network outlet water pipeline (32) and a heat pump unit heat supply network outlet water flow sensor (523) are transmitted to the controller (50), temperature signals detected by a temperature sensor (517) after mixed heat supply network return water and heat pump outlet water are transmitted to the controller (50), partial flow of the mixed heat supply network return water enters a water mixer (40) from a heat supply network return water bypass pipeline (12), and a heat supply network return water bypass pipeline regulating valve (541) on the heat supply network return water pipeline 50) The instruction is adjusted, a flow signal detected by a heat supply network backwater bypass flow sensor (522) is transmitted to a controller (50), the rest of heat supply network backwater enters a hot water boiler (20) through a boiler water inlet pipeline (13) to be heated, a flow signal detected by a boiler water inlet flow sensor (524) on the boiler water inlet pipeline (13) is transmitted to the controller (50), the heat supply network water enters a boiler water outlet pipeline (14) after being heated in the hot water boiler (20), a temperature signal detected by a boiler water outlet temperature sensor (518) on the boiler water outlet pipeline (14) is transmitted to the controller (50), boiler outlet water respectively enters the boiler outlet water and enters a water mixer pipeline (1401) and a heat pump unit driving hot water inlet pipeline (33), and a flow signal detected by a boiler water mixer flow sensor (526) on the boiler outlet water entering a water mixer pipeline (1401) is transmitted to the controller (50), a heat pump driving hot water pipeline regulating valve (542) on a heat pump unit driving hot water inlet pipeline (33) receives an instruction of a controller (50) to regulate, a flow signal detected by a heat pump unit driving hot water flow sensor (525) on the heat pump unit driving hot water inlet pipeline (33) is transmitted to the controller (50), driving hot water enters a heat pump unit (30) to drive the temperature of the hot water to be reduced, the driving hot water enters a heat pump unit driving hot water outlet pipeline (34), a heat pump unit driving hot water outlet temperature sensor (519) on a hot water outlet pipeline (34) of the heat pump unit drives a temperature signal to be transmitted to the controller (50), the driven hot water enters a water mixer (40) from the heat pump unit driving hot water outlet pipeline (34), boiler outlet water, hot water driven by the heat pump unit and bypass hot network return water enter a hot network water supply pipeline (15) after being mixed in the water, supplying to a heat supply network, detecting a temperature signal by a heat supply network water supply temperature sensor (512) on a heat supply network water supply pipeline (15) and transmitting the temperature signal to a controller (50), enabling residual hot water in a residual heat extraction device (60) to enter a heat pump unit (30) from a heat pump unit residual hot water inlet pipeline (35), detecting a temperature signal and a flow signal by a heat pump unit residual hot water inlet temperature sensor (515) and a heat pump unit residual heat sensor (527) on the heat pump unit residual hot water inlet pipeline (35) and transmitting the temperature signal and the flow signal to the controller (50), enabling residual hot water to enter a heat pump unit and a hot water outlet pipeline (36) after being cooled in the heat pump unit (30), driving the residual hot water into the residual heat extraction device (60) from a heat pump unit residual hot water circulating water pump (532) by receiving an instruction of the controller (50), detecting a temperature signal by a heat pump unit residual hot water outlet temperature sensor A controller (50);
high-temperature flue gas produced by hot water boiler (20) gets into desulfurizing tower (70) through first flue gas pipeline (21) and carries out the desulfurization, flue gas temperature after the desulfurization reduces, and discharge into the chimney through desulfurizing tower export flue gas pipeline (22), the desulfurization thick liquid in desulfurizing tower (70) gets into waste heat extraction element (60) through desulfurization thick liquid outlet pipe way (71), the heat transfer in waste heat extraction element (60), the desulfurization thick liquid after the cooling gets into desulfurizing tower (70) through desulfurization thick liquid inlet pipe way (72), heat pump set waste heat water inlet pipe way (35) in waste heat extraction element (60), it cools off in heat pump set (30) to get into, the waste heat water after the cooling is sent into heat pump set and hot water outlet pipe way (36) by heat pump set waste heat water circulating water pump (532), the back gets into waste heat extraction element (60).
3. A method for calculating the system heat supply capacity of the flue gas waste heat recovery and heat pump combined operation system based on the claim 1 is characterized by comprising the following steps:
Q＝F×(tg-th)×1.163
wherein: q is the system heat supply; f-flow of heat supply network system, return flow from heat supply networkA quantity sensor (521) measures; t is tg-mains supply water temperature, as measured by a mains supply water temperature sensor (512); t is th-return water temperature of the heat supply network, measured by a return water temperature sensor (511).
4. A method for calculating the hot water flow driven by a heat pump unit based on the flue gas waste heat recovery and heat pump combined operation system of claim 1 is characterized by comprising the following steps:
Q3＝Q2/0.8
Q3＝F1×(tqg-tqh)×1.163
wherein: q3-heat pump unit drive heat; q2-the amount of waste heat; f1-the heat pump unit drives the hot water flow, measured by a heat pump unit drive hot water flow sensor (525); t is tqg-the temperature of the hot water inlet driven by the heat pump unit is measured by a boiler outlet temperature sensor (518); t is tqhAnd the hot water outlet temperature driven by the heat pump unit is measured by a hot water outlet temperature sensor (519) driven by the heat pump unit.
5. A method for calculating the heating capacity of a heat pump unit based on the flue gas waste heat recovery and heat pump combined operation system of claim 1 is characterized by comprising the following steps:
Q4＝F2×(trg-trh)×1.163
wherein: q4-heating by a heat pump unit; q2-the amount of waste heat; f2-heat pump set heat supply network water flow, measured by heat pump set heat supply network water outlet flow sensor (523); t is trgThe outlet water temperature of the heat supply network of the heat pump unit is measured by a heat supply network outlet water temperature sensor (513); t is trh: -heat pump unit heat supply network inlet water temperature, measured by heat pump unit heat supply network inlet water temperature sensor (514).
6. A method for calculating the heat supply capacity of a hot water boiler based on the flue gas waste heat recovery and heat pump combined operation system of claim 1 is characterized by comprising the following steps:
Q1＝F3×(tg3-th1)×1.163
wherein Q is1-heat supply from hot water boilers; f3-boiler feed water flow, measured by boiler feed water flow sensor (524); t is tg3-boiler outlet water temperature, measured by boiler outlet water temperature sensor (518), th1And the mixed temperature of the return water of the heat supply network is measured by a temperature sensor (517) after the return water of the heat supply network is mixed with the outlet water of the heat pump.
7. A method for calculating the waste heat quantity of the flue gas waste heat recovery and heat pump combined operation system based on the claim 1 is characterized by comprising the following steps:
Q2＝F6×(tyg-tyh)×1.163
wherein: q2-the amount of waste heat; f6-residual heat water flow, measured by a heat pump unit residual heat sensor (527); t is tygThe temperature of the inflow water of the residual heat water is measured by a residual heat water inflow temperature sensor (515) of the heat pump unit; t is tyhAnd the return water temperature of the waste heat water is measured by a waste heat water outlet temperature sensor (516) of the heat pump unit.
8. A system heat supply amount calibration method based on the flue gas waste heat recovery and heat pump combined operation system of claim 1 is characterized by comprising the following steps:
respectively, Q ═ F × (t) was calculatedg-th) X 1.163 and Q ═ Q1+Q2Judging whether the two are the same
Wherein: q is the system heat supply; f, measuring the flow of the heat supply network system by a heat supply network backwater flow sensor (521); t is tg-mains supply water temperature, as measured by a mains supply water temperature sensor (512); t is th-heat supply network return water temperature, measured by a heat supply network return water temperature sensor (511); q1: heat supply by hot water boiler; q2: the residual heat quantity.
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| CN202110124574.XA Pending CN112902272A (en) | 2021-01-29 | 2021-01-29 | Flue gas waste heat recovery and heat pump combined operation system, operation method and calculation method |
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Citations (5)
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|---|---|---|---|---|
| JPS59215536A (en) * | 1983-05-23 | 1984-12-05 | Matsushita Electric Ind Co Ltd | Hot water supply device |
| CN206269113U (en) * | 2016-12-09 | 2017-06-20 | 深圳市海源节能科技有限公司 | A kind of heat pump auxiliary type residual heat from boiler fume recovery system |
| CN106996571A (en) * | 2017-05-17 | 2017-08-01 | 北京华源泰盟节能设备有限公司 | A kind of coal-fired hot-water boiler fume afterheat depth recovery system and its method |
| CN111981555A (en) * | 2020-08-24 | 2020-11-24 | 天津市城市规划设计研究总院有限公司 | Geothermal cascade utilization heating system based on absorption type and vapor compression type heat pumps |
| CN111981552A (en) * | 2020-05-22 | 2020-11-24 | 太原大四方节能环保股份有限公司 | Heat pump and gas boiler combined heating system and regulation and control method thereof |
-
2021
- 2021-01-29 CN CN202110124574.XA patent/CN112902272A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59215536A (en) * | 1983-05-23 | 1984-12-05 | Matsushita Electric Ind Co Ltd | Hot water supply device |
| CN206269113U (en) * | 2016-12-09 | 2017-06-20 | 深圳市海源节能科技有限公司 | A kind of heat pump auxiliary type residual heat from boiler fume recovery system |
| CN106996571A (en) * | 2017-05-17 | 2017-08-01 | 北京华源泰盟节能设备有限公司 | A kind of coal-fired hot-water boiler fume afterheat depth recovery system and its method |
| CN111981552A (en) * | 2020-05-22 | 2020-11-24 | 太原大四方节能环保股份有限公司 | Heat pump and gas boiler combined heating system and regulation and control method thereof |
| CN111981555A (en) * | 2020-08-24 | 2020-11-24 | 天津市城市规划设计研究总院有限公司 | Geothermal cascade utilization heating system based on absorption type and vapor compression type heat pumps |
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