CN113137591B - Waste heat recovery multi-element utilization device for large kitchen - Google Patents
Waste heat recovery multi-element utilization device for large kitchen Download PDFInfo
- Publication number
- CN113137591B CN113137591B CN202110442066.6A CN202110442066A CN113137591B CN 113137591 B CN113137591 B CN 113137591B CN 202110442066 A CN202110442066 A CN 202110442066A CN 113137591 B CN113137591 B CN 113137591B
- Authority
- CN
- China
- Prior art keywords
- water
- steam
- heat exchanger
- heat
- outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
- F22B3/04—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass by drop in pressure of high-pressure hot water within pressure- reducing chambers, e.g. in accumulators
-
- 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
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/04—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being spirally coiled
-
- 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
Landscapes
- 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)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention relates to a large kitchen waste heat recovery multi-utilization device which comprises a first heat exchanger connected with an air outlet of a range hood, wherein the first heat exchanger is also connected with a water collecting barrel, an air outlet pipe and a flash evaporator, a steam outlet at the top of the flash evaporator is connected with steam utilization equipment, the lower part of the flash evaporator is connected with a warm water tank, a waste water discharge pipe of the steam utilization equipment is connected with a second heat exchanger, the second heat exchanger is connected with the water collecting barrel and a liquid storage tank, a liquid outlet pipe is connected with an economizer, and the economizer is connected with a cold water tank. The invention can recover heat energy to produce hot water and high-temperature steam, and forcibly exchanges heat by utilizing the liquid phase change heat absorption principle through the economizer to produce cold water; the heat recovery is effectively utilized, the energy utilization efficiency is improved, the hot water requirement of cooking or other occasions is met, meanwhile, the working environment of a cooking place is improved due to the reduction of the smoke exhaust temperature, the fire hazard is eliminated, and the burden of a kitchen smoke exhaust system is reduced.
Description
Technical Field
The invention belongs to the technical field of heat energy recycling, and particularly relates to a waste heat recycling multi-element utilization device for a large kitchen.
Background
At present, the global energy shortage problem is faced, and the energy conservation is very important. The kitchen can produce a large amount of high temperature oil smoke and steam at work, and these heats often directly arrange to the open air through smoke ventilator, and waste heat resource waste causes the energy consumption of kitchen huge and urban environment thermal pollution problem.
When the large kitchen is normally used, a large amount of heat is needed to be used for washing vegetables, washing bowls, cleaning oil stains, unfreezing food and the like, cold energy is used for refrigerating food, the utilization form of waste heat resources of the kitchen is single at present, only hot water, hot air and the like are prepared, the requirements of various types of heat of the kitchen cannot be met, and therefore extra energy is needed to prepare steam, hot water and cold energy.
Disclosure of Invention
The invention aims to provide a large kitchen waste heat recovery multi-utilization device, which solves the problems that the existing kitchen waste heat resource utilization mode is single, hot water, hot air and the like are only prepared, and the multi-type heat requirements of a kitchen cannot be met, so that extra energy is needed for preparing steam, hot water and cold.
The invention relates to a large kitchen waste heat recovery multi-utilization device which comprises a first heat exchanger connected with an air outlet of a range hood, wherein the first heat exchanger is also connected with a water collecting barrel, an exhaust pipe and a flash evaporator, a steam outlet at the top of the flash evaporator is connected with steam utilization equipment, the lower part of the flash evaporator is connected with a warm water tank, a waste water discharge pipe of the steam utilization equipment is connected with a second heat exchanger, the second heat exchanger is connected with the water collecting barrel and a liquid storage tank, the liquid storage tank is connected with an economizer, and the economizer is connected with a cold water tank.
A heat exchange coil is arranged in the first heat exchanger, one end of the heat exchange coil is connected with a circulating water pump, the circulating water pump is connected with a water collecting barrel, the other end of the heat exchange coil is connected into the flash evaporator, an air outlet of the range hood is connected with an inlet of the first heat exchanger through an air inlet pipeline, and an outlet of the first heat exchanger is connected with an exhaust pipe extending out of a room. The heat exchanger is used for absorbing the waste heat of the range hood to heat the circulating water, and then the circulating water is used for producing steam for steam demand. The interior of the flash evaporator is in a low-pressure state, circulating water reaches the interior of the flash evaporator after heat exchange and is rapidly gasified, and gas-liquid two phases are formed in the interior of the flash evaporator. The required hot water and low-temperature steam can be obtained after the gas and the liquid are respectively separated.
A fan is arranged in the air inlet pipeline, and the outer surfaces of the fan and the heat exchange coil are coated with non-stick coatings. The oil drops, the solid particles and the water drops in the oil smoke are prevented from being attached to influence the operation result of the system.
An outlet of the first heat exchanger is connected with an expansion valve, the expansion valve is connected with a liquid storage tank, the liquid storage tank is connected with an evaporator, a refrigerant outlet of the evaporator is connected with a gas-liquid separator, the gas-liquid separator is connected with a refrigerant compressor, an outlet of the refrigerant compressor is connected with an inlet of the first heat exchanger, an air inlet of the evaporator is connected with an air inlet pipe, an air outlet of the evaporator is connected with an exhaust pipe, and a non-stick coating is coated on the inner wall of a heat exchange pipeline of the evaporator communicated with the exhaust pipe. The whole operation is safer and more reliable, and the operation is more stable.
And the phase-change heat storage material layer is wrapped outside the first heat exchanger. The excess heat can be stored by material phase change. The phase-change heat storage material layer adopts aliphatic acid as an organic heat storage phase-change material, the general formula of the phase-change heat storage material layer is CH3 (CH 2) 2n COOH, the range of phase-change enthalpy is 50J/g-150J/g, and the range of phase-change temperature is-15 ℃ to 70 ℃.
A steam compressor is arranged between the flash evaporator and the steam utilization equipment, and the steam compressor is connected with a water injection pump. The steam compressor is a Roots steam compressor or a wet screw compressor with strong boosting capacity, and the boosting capacity can reach 85Kpa.
A first thermal compensator is arranged between the steam compressor and the steam utilization equipment, the switch is used for adjusting whether to continuously heat the positive pressure saturated steam, the output of the saturated steam under different pressures can be realized, the steam requirements of multiple purposes are met, a second thermal compensator is arranged between the flash evaporator and the warm water tank, the switch is used for adjusting whether to continuously heat the hot water, the output of the hot water at different temperatures can be realized, and the requirements of a kitchen on the hot water at different temperatures are met. On one hand, the steam compressor provides a negative pressure environment for hot water circulating flash evaporation, ensures that hot water boils and evaporates in a low-temperature environment, thereby continuously flashing steam, fully utilizing the advantage of high energy efficiency ratio of a heat pump circulating system and improving the proportion of heat quantity of heat pump heating in a heat pump steam unit; on the other hand, the pressure of the steam and the temperature in the corresponding saturated state are increased, the steam discharged from the outlet of the flash evaporator is pressurized and heated, and the steam at the outlet of the flash evaporator is heated and pressurized by the steam compressor to become saturated steam in a positive pressure state, so that the steam is conveniently stored and further heated and utilized.
The waste water inlet of the second heat exchanger is connected with a waste water discharge pipe of the steam utilization equipment, the waste water outlet of the second heat exchanger is connected with the liquid storage tank, the compensation inlet of the second heat exchanger is connected with the compensation pipe, the compensation outlet of the second heat exchanger is connected with the water collecting barrel, the compensation pipe is connected with the liquid distributor, the inlet of the liquid distributor is connected with the water replenishing pump, and the other outlet of the liquid distributor is connected with the cold water inlet of the economizer. The cold water is convenient to supplement.
The waste water inlet of the economizer is connected with the liquid storage tank, the waste water outlet of the economizer is connected with the discharge pipe, and the cold water outlet of the economizer is connected with the cold water tank.
The discharge pipe is connected with a gas-liquid separation tank, the top of the gas-liquid separation tank is connected with a circulating pipe, and the other end of the circulating pipe is connected with a steam compressor. The economizer sheet is divided into a heating side and a condensing side; the heating side is the side where the hot water is expanded at low pressure and subjected to phase change gasification, the condensing side is the side where tap water flows through and undergoes forced heat exchange, the upper end of the plate condensing side is provided with a medium-temperature low-pressure gaseous working medium inlet, and the lower end of the plate condensing side is provided with a high-temperature low-pressure working medium outlet; the medium-temperature low-pressure gas state working medium inlet is communicated with steam utilization equipment through a check valve, tap water flow losing heat is in a normal-pressure low-temperature state, and is connected with the water collecting device through the liquid outlet, so that the working medium can be used as a kitchen cold source. The hot water passing through the expansion valve is subjected to a phase change gasification process, absorbs a large amount of heat, flows out from the high-temperature low-pressure working medium outlet and then enters the separation tank, and the water vapor separated from gas and liquid in the separation tank is a gaseous working medium and finally enters the steam compressor to finish a circulation process.
A valve is arranged between the circulating water pump and the water collecting barrel, and a conveying water pump is arranged between the second heat exchanger and the steam utilization equipment. The opening and the closing are convenient.
The first thermal compensator, the second thermal compensator, the water injection pump and the water replenishing pump can be connected with a PLC (programmable logic controller), and a control system is utilized to have the functions of heat storage, water replenishing control, temperature rise control, multi-stage waste heat recovery and the like, so that a waste heat recovery central control module is formed by reasonable control elements and scientifically integrated heat exchange, heating and reheating principles; the defects of unstable water temperature, resource waste and the like of the traditional waste heat recycling system are overcome, and the system has remarkable market application potential.
Compared with the prior art, the invention has the advantages that:
hot air exhausted by the pair of range hoods and tap water added into the first heat exchanger exchange heat through the first heat exchanger, hot water and high-temperature steam are produced through a flash evaporation compression technology, and cold water is produced through an economizer by forcibly exchanging heat by utilizing the liquid phase change heat absorption principle; in the kitchen operation stage, a large amount of heat carried in high-temperature air in a kitchen is fully absorbed and utilized through water-gas heat exchange; under the prerequisite that does not influence the culinary art effect, utilize waste heat production steam, hot water and cold water effectively utilize heat recovery, have not only improved energy efficiency, have solved cooking or other occasion hot water demands, simultaneously because smoke exhaust temperature's reduction has improved cooking place operational environment, has eliminated the conflagration hidden danger, has reduced the kitchen burden of system of discharging fume. And the energy consumption of a user is greatly reduced, the energy is saved, the environment is protected, the water and the electricity are saved, the production efficiency can be increased, and the using effect is good.
The refrigerant plays the most important role in the heat pump, the performance of the heat pump is limited by the thermophysical characteristics of the refrigerant, and the low-GWP refrigerant-water adopted for the heat pump can effectively improve the quality of low-grade energy and reduce the consumption of primary energy in the aspect of waste heat recovery. Water is representative of the fourth generation natural refrigerants, has the advantages of 0ODP and GWP, is non-toxic and non-flammable, and has good stability and durability. No pollution to environment in the using process
When water is used as a refrigerant, different phase changes and temperatures are carried out on the absorption and the release of heat by the water in the running process of the device, steam, hot water and cold water are generated, the utilization of different phase states of the water is perfectly realized, and the two purposes are achieved.
The hot water and the cold water generated by the device can be used for other aspects, the hot water can be used as a heat source of a heating radiator in winter, and the cold water can be used for air-conditioning water cooling in summer. The energy consumption of the refrigeration and heating of the air conditioner of the building is greatly reduced.
The kitchen waste heat utilization system is provided with the phase change heat storage module, so that the space is saved, the compact structure is realized, and the effect of centralized utilization of heat is realized.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic structural diagram of a first heat exchanger;
FIG. 3 is a schematic structural diagram of another embodiment of the present invention;
in the figure: 1. the system comprises a water collecting barrel, 2, a circulating water pump, 3, a fan, 4, a first heat exchanger, 5, a flash evaporator, 6, a steam compressor, 7, a first heat compensator, 8, steam utilization equipment, 9, a gas-liquid separation tank, 10, an economizer, 11, a second heat exchanger, 12, a liquid storage tank, 13, a water injection pump, 14, a liquid separator, 15, a water supplementing pump, 16, a second heat compensator, 17, a phase change heat storage material layer, 18, a warm water tank, 19, a cold water tank, 20, a conveying water pump, 21, a heat exchange coil, 22, an exhaust pipe, 23, an air inlet pipeline, 24, a circulating pipe, 25, an evaporator, 26, a liquid storage tank, 27, a gas-liquid separator, 28, a refrigerant compressor, 29 and an expansion valve.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the drawings.
Embodiment 1, as shown in fig. 1 to 2, the present invention is a large-scale kitchen waste heat recovery multi-utilization apparatus, including a first heat exchanger 4 connected to an air outlet of a range hood, the first heat exchanger 4 further connected to a water collecting tank 1, an air exhaust pipe 22 and a flash evaporator 5, a top steam outlet of the flash evaporator 5 connected to a steam utilization device 8, a lower portion of the flash evaporator 5 connected to a warm water tank 18, a waste water discharge pipe of the steam utilization device 8 connected to a second heat exchanger 11, the second heat exchanger 11 connected to the water collecting tank 1 and a liquid storage tank 12, the liquid storage tank 12 connected to an economizer 10, and the economizer 10 connected to a cold water tank 19.
A heat exchange coil 21 is arranged in the first heat exchanger 4, one end of the heat exchange coil 21 is connected with a circulating water pump 2, the circulating water pump 2 is connected with a water collecting barrel 1, the other end of the heat exchange coil 21 is connected into a flash evaporator 5, an air outlet of the range hood is connected with an air inlet of the first heat exchanger 4 through an air inlet pipeline 23, and an air outlet of the first heat exchanger 4 is connected with an exhaust pipe 22 extending out of a room.
The air inlet pipeline 23 is internally provided with a fan 3, and the outer surfaces of the fan 3 and the heat exchange coil 21 are coated with non-stick coatings.
And the exterior of the first heat exchanger 4 is wrapped with a phase change heat storage material layer 17.
A steam compressor 6 is arranged between the flash evaporator 5 and the steam utilization equipment 8, and the steam compressor 6 is connected with a water injection pump 13.
A first thermal compensator 7 is arranged between the steam compressor 6 and the steam utilization equipment 8, and a second thermal compensator 16 is arranged between the flash evaporator 5 and the warm water tank 18.
A waste water inlet of the second heat exchanger 11 is connected with a waste water discharge pipe of the steam utilization device 8, a waste water outlet of the second heat exchanger 11 is connected with a liquid storage tank 12, a compensation inlet of the second heat exchanger 11 is connected with a compensation pipe, a compensation outlet of the second heat exchanger 11 is connected with the water collecting barrel 1, the compensation pipe is connected with a liquid distributor 14, an inlet of the liquid distributor 14 is connected with a water replenishing pump 15, and the other outlet of the liquid distributor 14 is connected with a cold water inlet of the economizer 10.
A waste water inlet of the economizer 10 is connected with a liquid storage tank 12, a waste water outlet of the economizer 10 is connected with a discharge pipe, and a cold water outlet of the economizer 10 is connected with a cold water tank 19.
The discharge pipe is connected with a gas-liquid separation tank 9, the top of the gas-liquid separation tank 9 is connected with a circulating pipe 24, and the other end of the circulating pipe 24 is connected with the vapor compressor 6.
A valve is arranged between the circulating water pump 2 and the water collecting barrel 1, and a conveying water pump 20 is arranged between the second heat exchanger 11 and the steam utilization equipment 8. The steam utilization device 8 may be a steam dishwasher. A1 port and an A2 port on the first heat exchanger 4 are communicated, B1 and B2 are communicated, a C1 port and a C2 port in the second heat exchanger 11 are communicated, D1 and D2 are communicated, an E1 port and an E2 port of the economizer 10 are communicated, and F1 and F2 are communicated. The economizer 10 has an expansion valve connected to the port E1.
Method of producing steam and hot water:
1. preheating tap water: starting a steam compressor 6, compressing refrigerant water vapor into a high-temperature high-pressure gaseous working medium through the steam compressor 6, allowing the high-temperature high-pressure gaseous working medium to enter a steam utilization device 8 for condensation into a liquid state, obtaining liquid water with medium temperature and normal pressure, performing heat exchange and cooling on the liquid water and tap water input by a water replenishing pump 15 in a plate type heat exchanger II 11, further allowing the liquid water and the tap water to enter an economizer 10 for expansion and gasification, performing gas-liquid separation through a gas-liquid separation tank 9, and allowing the liquid water and the tap water to enter the steam compressor 6 to complete a circulation process; meanwhile, normal-temperature tap water is preheated to 30 +/-5 ℃ by the plate heat exchanger II 11 and then enters the water collecting barrel 1;
2. hot water circulation flash evaporation, pressurization and temperature rise are carried out to prepare steam, and hot water is separated: after entering a heat exchanger I4 through a circulating water pump 2, a water refrigerant exchanges heat with hot air and high-temperature oil smoke in a kitchen space, absorbs a large amount of heat, enters a low-pressure flash evaporator 5 after being heated, and is quickly evaporated into a gaseous working medium under the low-pressure condition; controlling the liquid level in the flash evaporator 5 to be higher than the position of a hot water outlet of the first heat exchanger 4, controlling the pressure in the flash evaporator 5 to be lower than the saturation pressure corresponding to the temperature of the hot water outlet of the first heat exchanger 4 to form a flash evaporation environment, continuously evaporating a gas-liquid mixture consisting of hot water and gas in the flash evaporator 5, simultaneously conveying the mixture upwards to complete a steam-water separation process, feeding steam from the upper part of a tank body of the flash evaporator 5 into a steam compressor 6, raising the temperature and the pressure to be more than 100 ℃, and then feeding the steam into a thermal compensator I7 to heat the steam to the required temperature of 110-180 ℃ to obtain steam at the required temperature; the steam comes out from the steam outlet c and enters the steam utilization equipment 8 for utilization, the hot water is cooled in the flash evaporator 5 and then enters the thermal compensator 16 from the hot water outlet at the lower part in the flash evaporator 5 to be heated to the required temperature, and then enters the warm water tank 18 from the warm water outlet a for use.
Method for producing cold water:
1. secondary heat exchange of hot water: starting a steam compressor 6, compressing refrigerant water vapor into a high-temperature high-pressure gaseous working medium through the steam compressor 6, allowing the high-temperature high-pressure gaseous working medium to enter a steam utilization device 8 to be condensed into a liquid state, obtaining liquid medium-temperature normal-pressure water, performing heat exchange and cooling on the liquid water and tap water input by a water replenishing pump 15 in a plate type heat exchanger II 11, further allowing the liquid water and the tap water to enter an economizer 10 to be expanded and gasified, performing gas-liquid separation through a gas-liquid separation tank 9, and allowing the gas-liquid separation to enter the steam compressor 6 to complete a circulation process; meanwhile, normal-temperature tap water is preheated to 30 +/-5 ℃ by the plate heat exchanger II 11 and then enters the water collecting barrel 1;
2. the heat loss process of tap water: after the step 1, the medium temperature hot water after primary heat exchange is subjected to a heat exchange process again, the medium temperature hot water passing through the outlet of the plate heat exchanger II 11 is connected with the economizer 10 through an expansion valve to perform a pressure reduction gasification process, meanwhile, the medium temperature hot water performs forced heat exchange with tap water shunted by a water replenishing pump 15 in the economizer 10, the medium temperature hot water is expanded and gasified, the required heat comes from the tap water, the gasified hot water enters a gas-liquid separation tank 9, and the separated low-pressure steam enters a steam compressor 6 to perform the next cycle; the temperature of the tap water after forced heat exchange is obviously reduced, the tap water is discharged from an upper outlet of the economizer 10 and enters the cold water tank 19 through a cold water outlet c for standby application, and the tap water can be used as a cold source for a kitchen.
Embodiment 2 is different from embodiment 1 in that an outlet of a first heat exchanger 4 is connected with an expansion valve 29, the expansion valve 29 is connected with a liquid storage tank 26, the liquid storage tank 26 is connected with an evaporator 25, a refrigerant outlet of the evaporator 25 is connected with a gas-liquid separator 27, the gas-liquid separator 27 is connected with a refrigerant compressor 28, an outlet of the refrigerant compressor 28 is connected with an inlet of the first heat exchanger 4, an air inlet of the evaporator 25 is connected with an air inlet pipeline 23, an air outlet of the evaporator 25 is connected with an air exhaust pipe 22, and the inner wall of the heat exchange pipeline of the evaporator 25 communicated with the air exhaust pipe 22 is coated with a non-stick coating.
In conclusion, the invention absorbs the heat of hot wind exhausted by the range hood through the refrigerant in the evaporator, the refrigerant after absorbing heat is heated and pressurized by the compressor and then exchanges heat with tap water added into the first heat exchanger, hot water and high-temperature steam are produced through a flash evaporation compression technology, and cold water is produced by forcibly exchanging heat through the economizer by utilizing the liquid phase change heat absorption principle; in the kitchen operation stage, a large amount of heat carried in high-temperature air in a kitchen is fully absorbed and utilized through water-gas heat exchange; under the prerequisite that does not influence the culinary art effect, utilize waste heat production steam, hot water and cold water effectively utilize heat recovery, have not only improved energy efficiency, have solved cooking or other occasion hot water demands, simultaneously because smoke exhaust temperature's reduction has improved cooking place operational environment, has eliminated the conflagration hidden danger, has reduced the kitchen system burden of discharging fume. And the energy consumption of a user is greatly reduced, the energy is saved, the environment is protected, the water and the electricity are saved, the production efficiency can be increased, and the using effect is good. The refrigerant plays the most important role in the heat pump, the performance of the heat pump is limited by the thermophysical characteristics of the refrigerant, the refrigerant used for the refrigerant circulation is R245fa, the working medium does not damage the ozone layer, meets the requirement of environmental protection, is non-toxic and non-combustible, has good thermal performance and thermal parameters, can be directly used in a heat pump unit, can effectively improve the quality of low-grade energy, and reduces the primary energy consumption. In addition, the refrigerant-water with low GWP is adopted in the water vapor cycle for the heat pump, and the water is representative of the fourth generation natural refrigerant, has the advantages of 0ODP and GWP, is non-toxic and non-inflammable, and has good stability and durability. The environment is not polluted in the using process. When water is used as a refrigerant, different phase changes and temperatures are carried out on the absorption and the release of heat by the water in the running process of the device at the same time, steam, hot water and cold water are generated, and the different phase utilization of the water is perfectly realized, so that the two aims are fulfilled. The hot water and the cold water generated by the device can be used for other aspects, the hot water can be used as a heat source of a heating radiator in winter, and the cold water can be used for air-conditioning water cooling in summer. The energy consumption of the refrigeration and heating of the air conditioner of the building is greatly reduced. The kitchen waste heat utilization system is provided with the phase change heat storage module, so that the space is saved, the compact structure is realized, and the effect of centralized utilization of heat is realized.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are for convenience only to describe the present invention without requiring the present invention to be necessarily constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Claims (6)
1. The utility model provides a big kitchen waste heat recovery multi-element utilizes device which characterized in that: the device comprises a first heat exchanger (4) connected with an air outlet of the range hood, wherein the first heat exchanger (4) is further connected with a water collecting barrel (1), an exhaust pipe (22) and a flash evaporator (5), a steam outlet at the top of the flash evaporator (5) is connected with steam utilization equipment (8), the lower part of the flash evaporator (5) is connected with a warm water tank (18), a wastewater discharge pipe of the steam utilization equipment (8) is connected with a second heat exchanger (11), the second heat exchanger (11) is connected with the water collecting barrel (1) and a liquid storage tank (12), the liquid storage tank (12) is connected with an economizer (10), and the economizer (10) is connected with a cold water tank (19); a steam compressor (6) is arranged between the flash evaporator (5) and the steam utilization equipment (8), and the steam compressor (6) is connected with a water injection pump (13); a waste water inlet of the second heat exchanger (11) is connected with a waste water discharge pipe of the steam utilization equipment (8), a waste water outlet of the second heat exchanger (11) is connected with a liquid storage tank (12), a compensation inlet of the second heat exchanger (11) is connected with a compensation pipe, a compensation outlet of the second heat exchanger (11) is connected with the water collecting barrel (1), the compensation pipe is connected with a liquid distributor (14), an inlet of the liquid distributor (14) is connected with a water replenishing pump (15), and the other outlet of the liquid distributor (14) is connected with a cold water inlet of the economizer (10); a waste water inlet of the economizer (10) is connected with a liquid storage tank (12), a waste water outlet of the economizer (10) is connected with a discharge pipe, and a cold water outlet of the economizer (10) is connected with a cold water tank (19); the discharge pipe is connected with a gas-liquid separation tank (9), the top of the gas-liquid separation tank (9) is connected with a circulating pipe (24), the other end of the circulating pipe (24) is connected with a steam compressor (6), a valve is arranged between the circulating water pump (2) and the water collecting barrel (1), and a conveying water pump (20) is arranged between the second heat exchanger (11) and the steam utilization equipment (8); preheating tap water: starting a steam compressor (6), compressing refrigerant water vapor into a high-temperature high-pressure gaseous working medium through the steam compressor (6), allowing the high-temperature high-pressure gaseous working medium to enter steam utilization equipment (8) to be condensed into a liquid state, obtaining liquid water at medium temperature and normal pressure, performing heat exchange and cooling on the liquid water and tap water input by a water supplementing pump (15) in a plate type heat exchanger II (11), further allowing the liquid water and the tap water to enter an economizer (10) for expansion and gasification, performing gas-liquid separation through a gas-liquid separation tank (9), and allowing the liquid water and the tap water to enter the steam compressor (6) to complete a circulation process; meanwhile, normal-temperature tap water is preheated by the plate heat exchanger II (11) and then enters the water collecting barrel (1); hot water circulation flash evaporation, pressurization and temperature rise are carried out to prepare steam, and hot water is separated: after entering the heat exchanger I (4), the water refrigerant exchanges heat with hot air and high-temperature oil smoke in a kitchen space to absorb a large amount of heat, the heat is heated and enters the low-pressure flash evaporator (5), and working medium water is rapidly evaporated into a gaseous working medium under the low-pressure condition; continuously evaporating a gas-liquid mixture consisting of hot water and gas in the flash evaporator (5) and simultaneously conveying the mixture upwards to finish a steam-water separation process, feeding steam into a steam compressor (6) from the upper part of a tank body of the flash evaporator (5) for heating and boosting, and then feeding the steam into a thermal compensator I (7) for heating to a required temperature to obtain steam at the required temperature; steam comes out from the steam outlet and enters the steam utilization equipment (8) for utilization, and hot water is cooled in the flash evaporator (5), then is discharged from a hot water outlet at the lower part in the flash evaporator (5), and then enters the warm water tank (18) from the warm water outlet for use.
2. The waste heat recycling device for large kitchens as claimed in claim 1, wherein: a heat exchange coil (21) is arranged in the first heat exchanger (4), one end of the heat exchange coil (21) is connected with a circulating water pump (2), the circulating water pump (2) is connected with a water collecting barrel (1), and the other end of the heat exchange coil (21) is connected into a flash evaporator (5).
3. The large kitchen waste heat recovery multi-utilization device of claim 2, characterized in that: the air outlet of the range hood is connected with the inlet of the first heat exchanger (4) through an air inlet pipeline (23), the outlet of the first heat exchanger (4) is connected with an outdoor exhaust pipe (22), a fan (3) is arranged in the air inlet pipeline (23), and the outer surfaces of the fan (3) and the heat exchange coil (21) are coated with coatings.
4. The large kitchen waste heat recovery multi-utilization device of claim 2, characterized in that: the outlet of the first heat exchanger (4) is connected with an expansion valve (29), the expansion valve (29) is connected with a liquid storage tank (26), the liquid storage tank (26) is connected with an evaporator (25), a refrigerant outlet of the evaporator (25) is connected with a gas-liquid separator (27), the gas-liquid separator (27) is connected with a refrigerant compressor (28), an outlet of the refrigerant compressor (28) is connected with an inlet of the first heat exchanger (4), an air inlet of the evaporator (25) is connected with an air inlet pipeline (23), an air outlet of the evaporator (25) is connected with an exhaust pipe (22), and the inner wall of the heat exchange pipeline of the evaporator (25) communicated with the exhaust pipe (22) is coated with a non-stick coating.
5. The large kitchen waste heat recovery multi-utilization device according to claim 3 or 4, characterized in that: and a phase change heat storage material layer (17) is wrapped outside the first heat exchanger (4).
6. The large kitchen waste heat recovery multi-utilization device of claim 5, wherein: a first thermal compensator (7) is arranged between the steam compressor (6) and the steam utilization equipment (8), and a second thermal compensator (16) is arranged between the flash evaporator (5) and the warm water tank (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110442066.6A CN113137591B (en) | 2021-04-23 | 2021-04-23 | Waste heat recovery multi-element utilization device for large kitchen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110442066.6A CN113137591B (en) | 2021-04-23 | 2021-04-23 | Waste heat recovery multi-element utilization device for large kitchen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113137591A CN113137591A (en) | 2021-07-20 |
| CN113137591B true CN113137591B (en) | 2022-12-06 |
Family
ID=76811890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110442066.6A Active CN113137591B (en) | 2021-04-23 | 2021-04-23 | Waste heat recovery multi-element utilization device for large kitchen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113137591B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877735B (en) * | 2022-05-09 | 2023-03-24 | 南京航空航天大学 | Forming machine oil-containing waste gas waste heat recovery system with energy memory |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201599939U (en) * | 2010-01-25 | 2010-10-06 | 郭笑 | Heat pump water heater by utilizing exhaust waste heat in kitchen |
| CN102840717A (en) * | 2011-06-25 | 2012-12-26 | 荣国华 | Heat energy recovery device |
| WO2013135135A1 (en) * | 2012-03-12 | 2013-09-19 | Rong Guohua | Air conditioning system for use in restaurant |
| CN107014015A (en) * | 2017-05-02 | 2017-08-04 | 浙江国祥股份有限公司 | Recovery type heat evaporating condensation type handpiece Water Chilling Units |
| CN208458560U (en) * | 2018-06-22 | 2019-02-01 | 上海帝广机电工程技术有限公司 | Ironing fume waste heat recycles energy saver |
| CN109626466A (en) * | 2019-01-23 | 2019-04-16 | 江苏科技大学 | A kind of high temperature sewage treatment and distilled water preparation system and its control method |
| CN111878865A (en) * | 2020-07-21 | 2020-11-03 | 张衍 | Kitchen integrated electric appliance and control method thereof |
-
2021
- 2021-04-23 CN CN202110442066.6A patent/CN113137591B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201599939U (en) * | 2010-01-25 | 2010-10-06 | 郭笑 | Heat pump water heater by utilizing exhaust waste heat in kitchen |
| CN102840717A (en) * | 2011-06-25 | 2012-12-26 | 荣国华 | Heat energy recovery device |
| WO2013135135A1 (en) * | 2012-03-12 | 2013-09-19 | Rong Guohua | Air conditioning system for use in restaurant |
| CN107014015A (en) * | 2017-05-02 | 2017-08-04 | 浙江国祥股份有限公司 | Recovery type heat evaporating condensation type handpiece Water Chilling Units |
| CN208458560U (en) * | 2018-06-22 | 2019-02-01 | 上海帝广机电工程技术有限公司 | Ironing fume waste heat recycles energy saver |
| CN109626466A (en) * | 2019-01-23 | 2019-04-16 | 江苏科技大学 | A kind of high temperature sewage treatment and distilled water preparation system and its control method |
| CN111878865A (en) * | 2020-07-21 | 2020-11-03 | 张衍 | Kitchen integrated electric appliance and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113137591A (en) | 2021-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103090485B (en) | Air conditioning system for restaurant | |
| CN204718176U (en) | Utilize the absorption system of residual heat from boiler fume | |
| CN205655523U (en) | Thermal wastewater heat recovery unit | |
| CN102261676A (en) | Integrated gas stove combined with air energy water heater and suction and exhaustion range hood | |
| CN109323234A (en) | Air energy boiler steam supply system | |
| CN108088074A (en) | Novel oil smoke heat recovery system and method based on absorption heat pump | |
| CN205561339U (en) | From overlapping heat pump system | |
| CN202757346U (en) | Central air-conditioning and hot water all-in-one machine | |
| CN201199118Y (en) | Novel energy-saving refrigeratory | |
| CN107014173B (en) | Direct-expansion solar-assisted closed-circuit heat pump drying system | |
| CN113137591B (en) | Waste heat recovery multi-element utilization device for large kitchen | |
| CN103759352A (en) | Heat pump and solar energy comprehensively utilized phase change energy storage system | |
| CN107120832A (en) | A kind of kitchen surplus energy utility Multifunctional heat pump system and its application method | |
| CN109282397B (en) | Novel energy storage air conditioning device and method based on air compression refrigeration cycle | |
| CN103851723A (en) | Air conditioning system for restaurant | |
| CN113915795B (en) | Solar solution latent heat energy storage double-source heat pump system | |
| CN202660808U (en) | Novel heat pipe and heat pump combined refrigerating device | |
| CN201575546U (en) | Heat absorption type air conditioner of waste heat reclaiming heat pipe for kitchen cooker | |
| CN204612241U (en) | Biomass direct-fired cold/hot water machine of lithium bromide group | |
| CN210718209U (en) | Heat pump system with defrosting function | |
| CN210485939U (en) | Comprehensive use system for regional centralized air conditioning refrigeration house | |
| CN210004618U (en) | evaporative cold space energy double-source heat pump heat recovery unit | |
| CN201311134Y (en) | Heating device combining condensation type wall-mounted furnace and heat pump | |
| CN208901670U (en) | Evaporate cold low form total heat recovery Air-Cooled Heat Pump Unit | |
| CN206803487U (en) | A kind of kitchen surplus energy utility Multifunctional heat pump system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |