CN111928313A - Compound system for recycling waste heat and sewage in cold area - Google Patents
Compound system for recycling waste heat and sewage in cold area Download PDFInfo
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- CN111928313A CN111928313A CN202010836073.XA CN202010836073A CN111928313A CN 111928313 A CN111928313 A CN 111928313A CN 202010836073 A CN202010836073 A CN 202010836073A CN 111928313 A CN111928313 A CN 111928313A
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- sewage
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- waste
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Images
Classifications
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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
-
- 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
- F24D19/0092—Devices for preventing or removing corrosion, slime or scale
-
- 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
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
- F24D19/1069—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water regulation in function of the temperature of the domestic hot water
-
- 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
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
- F24D19/1072—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water the system uses a heat 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
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
- F24D19/1081—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water counting of energy consumption
-
- 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
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
- F24D3/1066—Distributors for heating liquids
-
- 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
-
- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0012—Recuperative heat exchangers the heat being recuperated from waste water or from condensates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/01—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using means for separating solid materials from heat-exchange fluids, e.g. filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/003—Constructions of heat-exchange apparatus characterised by the selection of particular materials for domestic or space-heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/086—Heat exchange elements made from metals or metal alloys from titanium or titanium alloys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates
-
- 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
- F24D2200/08—Electric heater
-
- 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
- F24D2200/12—Heat 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
- F24D2200/00—Heat sources or energy sources
- F24D2200/16—Waste heat
- F24D2200/20—Sewage water
-
- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0035—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for domestic or space heating, e.g. heating radiators
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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]
- 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
-
- 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]
- Y02B30/56—Heat recovery units
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fluid Mechanics (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
A waste heat and sewage recycling composite system for cold regions. Its constitution of this product includes waste water waste heat recovery branch system, waste water waste heat recovery branch system includes heat pump set, heat pump set pass through the waste heat exchanger of sewage in the tube coupling sewage incasement box, waste heat exchanger of sewage pass through the tube coupling heat pump set, the pipeline is equipped with the secondary refrigerant, the sewage incasement box passes through the tube coupling dredge pump, the dredge pump is with sewage discharge, the hair collector of bathing pool water piping connection, the hair collector passes through the tube coupling sewage inlet tube, sewage advances the sewage distributing pipe in the water piping connection sewage incasement box. The invention is used for a sewage waste heat recycling composite system.
Description
The technical field is as follows:
the invention relates to a sewage waste heat recycling composite system in a cold region.
Background art:
the sewage is used as a heat source, which is very energy-saving, but the largest technical problem of sewage source heat recovery is as follows: because the sewage is utilized, the problems of frequent maintenance, short service life, low heat exchange efficiency and the like caused by blockage, corrosion and scaling of the heat exchanger can be caused by the recovery of the waste heat of the sewage in cold areas, the recovery effect of the waste heat of the sewage is poor,
the invention content is as follows:
the invention aims to provide a sewage and waste heat recycling composite system in a cold region.
The above purpose is realized by the following technical scheme:
a waste water and heat recovery and reuse composite system for cold regions comprises a waste water and heat recovery subsystem, wherein the waste water and heat recovery subsystem comprises a heat pump unit, the heat pump unit is connected with a waste water and heat exchanger in a sewage tank body through a pipeline, the waste water and heat exchanger is connected with the heat pump unit through a pipeline, a secondary refrigerant is filled in the pipeline, the sewage tank body in the sewage tank body is connected with a sewage pump through a pipeline, the sewage pump discharges sewage, a bath water discharge pipe is connected with a hair collector, the hair collector is connected with a sewage water inlet pipe through a pipeline, the sewage water inlet pipe is connected with a sewage distribution pipe in the sewage tank body, the heat pump unit is connected with a high-temperature water pump through a pipeline, the high-temperature water pump is connected with a first heat preservation water tank through a pipeline, the first heat preservation water tank is, the water mixer is connected with a second heat-preservation water tank through a pipeline, the second heat-preservation water tank is connected with a hot water output pipeline, a tap water inlet pipe is connected with the water mixer through a pipeline, the tap water inlet pipe is connected with a fan-coil unit through a first electronic scale remover, the fan-coil unit is connected with a second electronic scale remover through a pipeline, the second electronic scale remover is connected with a heat pump unit through a pipeline, the heat pump unit is connected with a first heat-preservation water tank through a pipeline, the fan-coil unit is connected with the first heat-preservation water tank through a pipeline, the tap water inlet pipe is connected with a cold water tank through a pipeline, the cold water tank is connected with a heat pump through a pipeline, the heat pump is connected with a circulating pump through a pipeline, the circulating pump is connected with a drainage tank through a pipeline, the water pump is connected with a cold water tank through a pipeline, the cold water tank is connected with a medium-temperature water pump through a pipeline, and the medium-temperature water pump is connected with a heat-preservation water tank and a heat pump unit through a pipeline;
or the cold water tank is connected with the ground heat pump through a pipeline, the ground heat pump is connected with the water pump through a pipeline, the water pump is connected with the cold water tank through a pipeline, the cold water tank is connected with the medium temperature water pump through a pipeline, and the medium temperature water pump is connected with the heat preservation water tank and the heat pump unit through a pipeline.
The fan-coil unit is connected with the electric heater through a pipeline, the electric heater is connected with the first heat-preservation water tank through a pipeline,
a group of diversion partition plates are arranged in the inner box body of the sewage tank, the diversion partition plates are longitudinally arranged in parallel, a group of sewage waste heat exchangers are arranged in the inner tank body of the sewage tank, the sewage waste heat exchangers are transversely parallel to each other, the top of the sewage waste heat exchanger is provided with a sewage distribution pipe which is connected with a sewage inlet pipe, the sewage waste heat exchanger is connected with a sewage waste heat communicating pipe, the lower part of the sewage waste heat communicating pipe is connected with a water inlet pipe, the water inlet pipe is connected with a heat pump unit, the upper part of the sewage waste heat communicating pipe is connected with a water outlet pipe, the water outlet pipe is connected with the heat pump unit, the bottom of the box body in the sewage tank is provided with a distributed sewage recovery pipe which is connected with a sewage pump, the sewage tank inner box body is arranged in the sewage tank outer box body, and a sewage tank heat-insulating material is arranged between the sewage tank inner box body and the sewage tank outer box body.
The sewage waste heat exchanger is assembled by a group of heat exchange tubes which are installed in parallel, each group of heat exchange tubes consists of a plurality of tubes which are installed in parallel from top to bottom, and a plurality of groups of heat exchange tubes are installed in parallel to ensure that the heat exchangers are fully distributed in the heat-preservation sewage tank;
a sewage distributing pipe is arranged above the interior of the box body in the sewage box, so that high-temperature sewage enters the sewage box in a jet mode, and the sewage distributing pipe is uniformly distributed above the sewage waste heat exchanger to generate vibration and strengthen the heat exchange effect; when the temperature is high, the sewage exchanges heat with the secondary refrigerant in the sewage waste heat exchanger arranged at the middle upper layer in the sewage tank, the temperature is gradually reduced due to the absorption of the heat of the sewage, the specific gravity of the sewage is increased, and the sewage falls into the bottom layer of the sewage tank, so that a temperature gradient is generated; the heat-absorbed low-temperature sewage sinks into the lower layer and is discharged in an overflowing mode through the distributed sewage recovery pipes under the action of new high-temperature sewage pressure, so that heat loss is avoided;
low-temperature secondary refrigerant enters from an inlet at the bottom of the water inlet pipe at a certain flow velocity in the sewage waste heat exchanger, heat exchange is carried out between sewage with a temperature gradient in the sewage tank and the form of a multi-pipe layer, the flow velocity is higher, the heat transfer effect is more remarkable, high-temperature secondary refrigerant flows out from an outlet of an upper-layer water outlet pipe of the sewage waste heat exchanger and enters a unit evaporator, heat in the secondary refrigerant is absorbed by refrigerant in the unit through conversion, the low-temperature secondary refrigerant returns to the inlet at the bottom of the water inlet pipe again, and heat absorption is carried out in a circulating mode.
The sewage waste heat exchanger adopts an immersion structure, and is immersed in sewage, so that dirt is conveniently cleaned; the sewage distributing pipe enables high-temperature sewage to generate transverse scouring and temperature gradient when entering the sewage tank, ensures that the high-temperature sewage uniformly and fully exchanges heat, ensures that the heat-absorbed low-temperature sewage sinks into the lower layer, and is discharged in an overflow mode through the recovery device, namely the distributed sewage recovery pipe under the action of new high-temperature sewage pressure, thereby avoiding heat loss;
the diversion partition plates are designed and additionally distributed in the sewage tank in a staggered manner, the flow speed of the sewage is increased by the diversion partition plates, the flow time is prolonged, heat exchange is sufficient, and the sewage with the lowest temperature is ensured to be uniformly and quickly discharged; the lower part of the sewage waste heat exchanger is provided with a distributed sewage recovery pipe, so that low-temperature sewage is quickly discharged; meanwhile, the secondary refrigerant with a certain flow velocity enters the bottom inlet of the sewage waste heat exchanger, flows through the whole sewage waste heat exchanger from bottom to top, and performs sufficient heat exchange with the sewage passing in the reverse direction, so that the heat obtained by the secondary refrigerant is maximized, and the heat recovery efficiency is maximized.
The sewage waste heat recycling composite system for the cold region further comprises a heat guarantee subsystem, wherein the heat guarantee subsystem comprises a fan-coil unit, the fan-coil unit is connected with an electric heater through a pipeline, and the electric heater is connected with a first heat-preservation water tank through a pipeline.
The waste heat and sewage recycling composite system for the cold area further comprises a smell removing and sewage discharging subsystem, wherein the smell removing and sewage discharging subsystem is composed of an air channel and a low-noise ventilator, and the air channel is connected with the low-noise ventilator.
Has the advantages that:
1. based on the heat pump principle, the invention transfers low-temperature low-level heat energy in bath wastewater or domestic sewage to high-level heat energy through inputting a small amount of high-level electric energy, realizes the functions of heat supply and refrigeration, and is a high-efficiency, environment-friendly and energy-saving waste heat recycling system.
2. The temperature of the sewage discharged after bathing is about 35 ℃, the heat in the sewage is efficiently extracted by the heat exchange equipment of the system and is added into the hot bath water to form the recycling of waste heat. In the process, the recovered heat accounts for more than 85% of the heat required for heating the bath hot water, and the rest 15% of heat is generated by the lowest temperature of the sewage which is the heat converted from all the electric energy input during the operation of the heat pump and can be discharged after being reduced to about 4 ℃, so that the formation of environmental heat pollution is avoided.
In the heat recovery circulation process, the temperature of the sewage is reduced to 4 ℃ from about 25 ℃ to 35 ℃ on average, meanwhile, the bathing tap water is increased from 10.7 ℃ (the average temperature of the whole-year tap water of Harbin) to 40 ℃ -60 ℃ by the work of a heat pump, and the temperature of the bathing hot water can be adjusted according to the requirement and can reach more than 60 ℃ at most. The system heating coefficient COP is 5 on average all year around, the energy efficiency is high, and the system heating coefficient COP is a very practical energy-saving and environment-friendly technology.
3. The invention utilizes renewable energy, the bath sewage is waste heat resource which is directly discharged into the environment originally, and the system recycles and heats the domestic hot water, thereby reflecting the characteristics of the renewable energy.
4. The system can save energy and reduce emission, replaces a coal-fired and gas-fired boiler room, reduces occupied area, realizes environmental protection of a small integrated area, does not generate air pollution in operation, and reduces heat pollution caused by sewage discharge to the environment.
5. The invention has the advantages of economical operation, 4.5-6.5kW of heat energy can be extracted from sewage by inputting 1kW of electric energy, and the operation cost is 1/4-1/5 of gas boilers and 1/5-1/6 of electric boilers.
6. The invention is safe and reliable, the sewage temperature is relatively stable throughout the year, the invention is not influenced by the weather and the environmental temperature, the invention is a good low-temperature heat source, and the requirement of producing hot water can be met without additional heat source supplement in winter; if extremely cold weather occurs in winter, a small amount of heat source supplement can be carried out through the guarantee system.
7. The invention has simple maintenance and simple maintenance of the system operation process, and the normal operation of the equipment can be satisfied by only cleaning the dirt adhered to the equipment once every year in operation.
Description of the drawings:
FIG. 1 is a schematic structural diagram of a waste heat and sewage recycling complex system for cold regions.
FIG. 2 is a schematic diagram of the connection structure of the ground heat pump of the composite system for recycling and reusing waste water and heat in the cold area. .
FIG. 3 is a three-dimensional structure diagram of the inner box body of the sewage box.
FIG. 4 is a front view of the inner tank body of the sewage tank of the product.
FIG. 5 is a top view of the inner tank body of the sewage tank of the present invention.
Fig. 6 is a side view of the inner body of the waste water tank of the present invention.
FIG. 7 is a schematic diagram of the waste heat and sewage exchanger of the present invention.
FIG. 8 is an operation schematic diagram of a waste water waste heat recovery subsystem of the present invention.
FIG. 9 is a schematic diagram of the waste water waste heat recovery subsystem of the present invention.
Fig. 10 is a monitoring and monitoring system architecture diagram of the present invention.
FIG. 11 is a schematic diagram of the system operation of the present invention.
FIG. 12 is a schematic diagram of a stand-alone operation of the present invention.
FIG. 13 is a schematic diagram of an APP operation interface of a mobile phone according to the present invention.
FIG. 14 is a diagram of an odor elimination waste configuration of the present invention.
Fig. 15 is a view of the station arrangement of the a17 apartment complex heat pump system of the present invention.
Fig. 16 is a diagram of the power distribution system of the a17 apartment complex heat pump system of the present invention.
Fig. 17 is a PLC system diagram of an a17 apartment complex heat pump system of the present invention.
FIG. 18 is a plan view of an A17 apartment public bathroom fixture of the present invention.
The specific implementation mode is as follows:
the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.
Example 1:
a waste water and waste heat recycling composite system for cold regions comprises a waste water and waste heat recycling subsystem, wherein the waste water and waste heat recycling subsystem comprises a heat pump unit 1, the heat pump unit 1 is connected with a waste water and waste heat exchanger 3-2 in a sewage tank inner box body 3-1 through a pipeline, the waste water and waste heat exchanger 3-2 is connected with the heat pump unit 1 through a pipeline, the pipeline is filled with refrigerant, the sewage tank inner box body 3-1 is connected with a sewage pump 23 through a pipeline, the sewage pump 23 discharges sewage, a bath pool water discharging pipe is connected with a hair collector 22, the hair collector 22 is connected with a sewage inlet pipe 3-4 through a pipeline, the sewage inlet pipe 3-4 is connected with a sewage distributing pipe 3-3 in the sewage tank inner box body 3-1, the heat pump unit 1 is connected with a high-temperature water pump 21, high temperature water pump 21 passes through the first heat preservation water tank 17 of tube coupling, and first heat preservation water tank 17 passes through tube coupling hot water mixing pump 20, and hot water mixing pump 20 passes through tube coupling water mixer 19, water mixer 19 passes through tube coupling second heat preservation water tank 18, and hot water output pipeline is connected to second heat preservation water tank 18, and the running water inlet tube passes through tube coupling water mixer 19, and the running water inlet tube passes through first electron descaler 11 and connects fan-coil unit 15, and fan-coil unit 15 passes through tube coupling second electron descaler 12, and second electron descaler 12 passes through tube coupling heat pump set 1, and heat pump set 1 passes through tube coupling first heat preservation water tank 17, and fan-coil unit 15 passes through tube coupling first heat preservation water tank 17.
Example 2:
Or the cold water tank 5 is connected with the ground heat pump 4-1 through a pipeline, the ground heat pump 4-1 is connected with the water pump 9 through a pipeline, the water pump 9 is connected with the cold water tank 5 through a pipeline, the cold water tank 5 is connected with the medium temperature water pump 10 through a pipeline, and the medium temperature water pump 10 is connected with the heat preservation water tank 17 and the heat pump unit 1 through a pipeline.
The fan-coil unit 15 is connected with an electric heater 16 through a pipeline, and the electric heater 16 is connected with a first heat-preservation water tank 17 through a pipeline.
Example 3:
the cold region sewage waste heat recovery and reuse composite system described in embodiment 1, a set of flow guide partition plates 3-10 is installed in a sewage tank inner tank body 3-1, the flow guide partition plates 3-10 are longitudinally arranged in parallel, a set of sewage waste heat exchangers 3-2 are installed in the sewage tank inner tank body, the sewage waste heat exchangers are transversely arranged in parallel, a sewage distribution pipe 3-3 is arranged on the top of the sewage waste heat exchanger, the sewage distribution pipe 3-3 is connected with a sewage inlet pipe 3-4, the sewage waste heat exchanger 3-2 is connected with a sewage waste heat communicating pipe 3-5, the lower part of the sewage waste heat communicating pipe 3-5 is connected with an inlet pipe 3-7, the inlet pipe 3-7 is connected with a heat pump unit 1, and the upper part of the sewage waste heat communicating pipe 3-5 is connected with an outlet, the water outlet pipe 3-11 is connected with the heat pump unit 1, the bottom of the sewage tank inner box body is provided with a distributed sewage recovery pipe 3-6, the distributed sewage recovery pipe 3-6 is connected with the sewage pump 23, the sewage tank inner box body 3-1 is arranged in the sewage tank outer box body 3-8, and a sewage tank heat insulation material 3-9 is arranged between the sewage tank inner box body and the sewage tank outer box body.
The sewage waste heat exchanger 3-2 is assembled by a group of heat exchange tubes which are arranged in parallel, each group of heat exchange tubes consists of a plurality of tubes which are arranged in parallel from top to bottom, each group of heat exchange tubes has a certain height, and a plurality of groups of heat exchange tubes are arranged in parallel to ensure that the heat exchangers are fully distributed in the heat insulation sewage tank;
preferably, the sewage waste heat exchanger 2 is designed to adopt a multi-tube pass fin zigzag structure, the number of tube passes can be determined by combining numerical analysis optimization design with model experiments, and the maximum heat transfer area is the constraint condition;
a sewage distribution pipe 3-3 is arranged above the inside of the box body 3-1 in the sewage tank, so that high-temperature sewage enters the sewage tank in a jet mode, and the sewage distribution pipe 3-3 is uniformly distributed above the sewage waste heat exchanger 3-2 to generate vibration and strengthen the heat exchange effect; when the temperature is high, the sewage exchanges heat with the secondary refrigerant in the sewage waste heat exchanger 3-2 at the middle upper layer in the sewage tank, the temperature is gradually reduced as the heat of the sewage is absorbed, the specific gravity of the sewage is increased and falls into the bottom layer of the sewage tank, and a temperature gradient is generated; the heat-absorbed low-temperature sewage sinks into the lower layer and is discharged in an overflowing manner through the distributed sewage recovery pipes 3-6 under the action of new high-temperature sewage pressure, so that heat loss is avoided;
the low-temperature secondary refrigerant in the sewage waste heat exchanger 3-2 enters from the inlet at the bottom of the water inlet pipe 3-7 at a certain flow velocity, and exchanges heat with sewage with temperature gradient in the sewage tank in the form of a multi-pipe layer, the higher the flow velocity is, the more remarkable the heat transfer effect is, the high-temperature secondary refrigerant flows out from the outlet of the water outlet pipe 3-11 at the upper layer of the sewage waste heat exchanger and enters the evaporator of the unit, the heat in the secondary refrigerant is absorbed by the refrigerant in the unit through conversion, and the low-temperature secondary refrigerant returns to the inlet at the bottom of the water inlet pipe 3-7 to circularly absorb heat, so.
The sewage waste heat exchanger 3-2 can adopt a non-metal heat exchanger as a preferred scheme, and a heat conducting element is added in the non-metal heat exchanger, so that the heat conductivity is good, and the strength is high; no corrosion, no scaling, easy cleaning and convenient installation.
The sewage waste heat exchanger 3-2 adopts an immersion structure, and is immersed in sewage so as to be convenient for cleaning dirt;
as a preferred scheme, an anti-freezing heat exchange medium can be injected into the sewage waste heat exchanger 3-2, and non-contact heat exchange is carried out on sewage through the sewage waste heat exchanger, so that the safety of the water heating unit is ensured.
The sewage waste heat exchanger is assembled by a plurality of sewage waste heat exchangers, and is convenient to install and maintain.
Sewage case design distributed sewage distribution and recovery unit specifically is: the sewage distributing pipes 3-3 enable high-temperature sewage to generate transverse scouring and temperature gradient when entering the sewage tank, so that the high-temperature sewage is ensured to be uniformly and fully subjected to heat exchange, the heat-absorbed low-temperature sewage is sunk into the lower layer, and the sewage is discharged in an overflow mode through a recovery device, namely the distributed sewage recovery pipes 3-6 under the action of new high-temperature sewage pressure, so that heat loss is avoided;
the distributed sewage distribution and recovery device is formed by additionally arranging a sewage distribution pipe 3-3 and a distributed sewage recovery pipe 3-6 in the sewage tank, so that a temperature drop layer in the sewage tank is not damaged, and good temperature layer change caused by severe water temperature is kept;
the distributed sewage recovery pipes 3-6 are additionally arranged, so that the low-temperature sewage at the lower layer of the water tank is discharged at the lowest temperature in a centralized manner, and the energy loss of sewage discharge is reduced.
The diversion partition plates 3-10 are designed to be distributed in the sewage tank in a staggered manner, the diversion partition plates 3-10 increase the flow speed of sewage, prolong the flow time, fully exchange heat and ensure that the sewage at the lowest temperature is uniformly and quickly discharged.
The lower part of the sewage waste heat exchanger is provided with distributed sewage recovery pipes 3-6, so that low-temperature sewage is quickly discharged. Meanwhile, the secondary refrigerant with a certain flow velocity enters the bottom inlet of the sewage waste heat exchanger, flows through the whole sewage waste heat exchanger from bottom to top, and performs sufficient heat exchange with the sewage passing in the reverse direction, so that the heat obtained by the secondary refrigerant is maximized, and the heat recovery efficiency is maximized.
Example 4:
the cold region sewage waste heat recovery and reuse composite system of embodiment 1, the sewage waste heat exchanger is a titanium alloy metal heat exchanger, and a, the sewage waste heat exchanger adopts a heat exchanger for bathing sewage. b. No corrosion, no scaling, easy cleaning and convenient installation.
c. The sewage waste heat exchanger adopts an immersion structure, and is immersed in sewage, so that dirt can be cleaned conveniently.
d. The waste heat exchanger of the sewage is a titanium alloy metal heat exchanger, an evaporator of the unit is directly replaced, an intermediate indirect heat exchange link is reduced, non-contact heat exchange is carried out between the heat exchanger and the sewage, and the safety of the hot water unit is ensured.
e. The heat exchanger is assembled by a plurality of heat exchangers, and is convenient to install and maintain.
The sewage distributing and recycling device and the sewage tank are provided with a water distributing and collecting system, so that the low-temperature sewage is rapidly discharged, and the high-temperature sewage is fully subjected to heat exchange.
a. The sewage distribution and recovery device is additionally arranged in the sewage pool, and the stable gradient layer change of the sewage temperature from top to bottom caused by gravity is kept on the premise of not damaging the sewage temperature layer drop in the sewage tank.
b. The design installs sewage discharge apparatus additional, concentrates the low temperature sewage of water tank lower floor with minimum temperature discharge, reduces sewage discharge's energy loss.
The indoor bathing water vapor waste heat recovery device is provided with a fan coil unit 15 which collects water vapor waste heat during bathing in a bathroom, heats tap water before entering the unit and raises the temperature by 3-5 ℃.
The inner sewage tank body 3-1 is arranged in the outer sewage tank body 3-8 to form a heat storage sewage tank, the outer sewage tank body 3-8 adopts a steel structure framework, and the skin is formed by bonding and adhering glass fiber or basalt fiber cloth, so that the sewage tank has the characteristics of corrosion resistance, seepage resistance and durability, and the service life is more than 20 years. The outer layer is pasted with a heat insulation material, and the heat insulation is totally closed.
The hot bath water tank is composed of a first heat-preservation water tank 17 and a second heat-preservation water tank 18, the first heat-preservation water tank 17 and the second heat-preservation water tank 18 both adopt a sandwich structure form, the inner layer is a stainless steel plate and serves as a water tank liner body, the outer layer is a common stainless steel plate, the middle layer is made of heat-preservation materials, the inner stainless steel plate, the outer stainless steel plate and the heat-preservation sandwich layer are optimally combined, and the requirement of keeping the temperature of the hot bath water for a long time is met.
The heat pump unit 1 adopts a one-time heating technology, namely, can heat source water to 40-60 ℃ and can heat the water to 65 ℃ at most.
The hot water unit 1 has small volume and light weight, is convenient to carry and is particularly suitable for reconstruction projects; the unit has compact structure, small vibration, small occupied area and convenient installation. The multiple units are mutually standby, and the fault of any one unit does not influence the normal bathing water supply.
The hot water unit main machine adopts a high-quality flexible scroll compressor, is assisted by a plurality of noise reduction and damping measures, and has small vibration and low noise.
The water mixer 19 directly adjusts the high-temperature water (45-60 ℃) heated by the heat pump unit 1 and the tap water (4-20 ℃) to the use temperature through the designed water mixer, and the high-temperature water enters the water mixing tank or is directly supplied to a shower nozzle of a bathing pool.
Example 5:
the waste heat and sewage recycling composite system in the cold region of embodiment 4 further includes a heat protection subsystem, the heat protection subsystem includes a fan-coil unit 15, the fan-coil unit 15 is connected to an electric heater 16 through a pipeline, the electric heater 16 is connected to a first heat-preserving water tank 17 through a pipeline, on the premise that power capacity is guaranteed, a rapid hot water heating device (the electric heater 16) is arranged in the system or return water heat energy of a heat supply network is used as a heat source protection system to directly heat tap water to 40-60 ℃ to supplement bathing hot water, or the temperature of the tap water is increased by 5-15 ℃ under extremely cold conditions in winter, so that the unit can normally and stably operate. (the thermal assurance subsystem does not need to be started up to operate under normal conditions).
Example 6:
the waste heat recovery and reuse composite system for sewage in the cold region of embodiment 4 further comprises a smell removal and pollution discharge subsystem, an independent system is established for sewage smell discharge, the smell removal and pollution discharge subsystem is composed of an air duct 31 and a low-noise ventilator 30, the air duct is connected with the low-noise ventilator to form the independent pollution discharge system, and the heat exchangers in the sewage tank and the sewage tank are cleaned once every year.
According to the odor removing and discharging subsystem, an independent system is required to be established for discharging odor of sewage, and the odor is prevented from being crossed with a building discharging system.
The sewage tank and the heat exchanger in the sewage tank are cleaned once every year, so that the operation efficiency of the system is guaranteed, the sanitary requirement of the system is guaranteed, and accidents are avoided.
Example 7:
the cold region sewage waste heat recovery and reuse composite system of embodiment 4 further comprises a shock absorption, sound insulation and noise reduction system, wherein the bath pool reconstruction project is arranged at the bottom layer of the student apartment or in the basement, and the design and construction are strictly in accordance with the national standard requirements, and the measures of shock absorption and noise reduction are adopted for equipment units in the equipment room. The method specifically comprises the following steps: the lower part of the equipment is connected with a vibration reduction base, the vibration reduction base is connected with the ground through a vibration reduction damper, and the outer layer of the equipment is provided with a sound insulation material or a sound insulation board.
Example 8:
the cold region sewage waste heat recovery and reuse composite system of embodiment 4 may further include, as a preferred scheme, a monitoring subsystem including: the system comprises a temperature sensor, a flow sensor, a pressure sensor, a liquid level sensor, an ultrasonic calorimeter, a data concentrator, monitoring system software and an industrial personal computer. The monitoring subsystem adopts a bus technology to implant a microprocessor into a traditional measurement control instrument to form a network control system, performs data transmission according to a standard communication protocol, and connects a plurality of on-site hot water units and instruments with a remote monitoring computer to realize various automatic control systems which are suitable for actual requirements through data transmission and information exchange.
The monitoring system software (monitoring and monitoring system) has the functions of starting and stopping control and running state display of a single unit, local and remote operation can be respectively carried out on each unit, and running state of the heat pump hot water unit can be monitored through mobile phone end software, so that starting and stopping control of the hot water unit is realized.
The monitoring and monitoring system realizes the automatic and continuous operation of the system by controlling the number of the units in operation and configuring the start-stop program. And when the bathing peak is reached, the system unit and the backup unit are started simultaneously, so that the problem of sewage heat source loss is basically solved. When the peak period is over, the number of people who take a bath is gradually reduced, the quantity of heat which can be recovered is reduced, the COP value of the system is gradually reduced, at the moment, the monitoring system automatically reduces the number of units which operate, reduces the power consumption of the system, improves the heat recovery efficiency, and stops the operation of the units automatically until the heat-preservation hot water tank is full or a certain quantity of hot water is produced according to the requirement, the whole system does not work any more, and the heat recovery efficiency of the system is ensured to reach 100%.
The monitoring and controlling system realizes the monitoring and displaying of the average temperature of a heat source, the regulation of hot water flow and temperature, the displaying of the instantaneous heat production water amount of a single unit, the displaying of the recovery heat and percentage of secondary refrigerant in a heat exchanger of the single unit, the liquid level control of a water tank, the on-off control of a cold (hot) water valve in a heat recovery system of a fan coil, the start-stop and speed regulation control of a motor and the like.
The monitoring system has the functions of fault self-diagnosis, alarm, automatic protection and the like. The alarm function is perfect, and the alarm contents such as over-temperature alarm, over-low temperature alarm, power supply phase sequence error alarm, phase failure alarm, motor overload alarm, water flow fault alarm, water pressure fault alarm, over-high pressure alarm, over-low pressure alarm, full water alarm of the hot water tank and the like are provided.
The monitoring system has the functions of data curve display, printing and historical data derivation. And meanwhile, data are analyzed, energy consumption is accumulated, energy is saved, the discharge capacity and the production cost are reduced, and cost is saved. And basic information such as indoor and outdoor temperature and humidity, the on-line use number of the spray heads, the total number of people for bathing, weather forecast and the like can also be displayed. The current bathroom use condition can be checked on line through the mobile phone APP, and the bathing time is reasonably arranged.
The monitoring and controlling system can provide a multi-user multi-account management function, provides a hierarchical management mode of online data monitoring and controlling for a manager, provides a real-time data display function, is rich in historical data analysis means, can select 1-hour, 24-hour, 15-day, 1-month, half-year and all-year historical data, and has functions of data curve display, printing and historical data derivation.
The system does not need manual nursing during operation, is unattended and can be remotely monitored.
The system optimizes the original software and hardware, adopts the latest monitoring software in the aspect of software, has more timely response to hardware information acquisition, has higher operation efficiency and also has the condition of uninterrupted operation. The computer adopted in the hardware aspect is an i7 processor, and is provided with a large-screen television as a split screen, so that a person entering a bath can clearly and clearly watch a system working picture, data is dynamically displayed, colors are obviously distinguished, and detailed information can be checked by clicking equipment such as a machine set or a water tank.
The monitoring system for waste heat recovery of bath waste water is a product combining heat pump technology, automatic control technology and computer network technology, can reasonably utilize equipment, save energy, save manpower, ensure safe operation of the equipment, prolong the service life, strengthen the modern management of bath electromechanical equipment, create safe, comfortable and convenient working environment and improve the management level.
Example 9:
the waste heat and sewage recycling composite system in the cold area in embodiment 4 is a preferred scheme, and further comprises a free air-conditioning subsystem, wherein when the hot water system is used for preparing domestic hot water, a single unit generates about 40kW of cold energy, and a double unit generates about 80kW of cold energy, so that the waste heat and sewage recycling composite system is used for meeting the use requirement of an air conditioner in summer; the cold energy is transmitted to an air-conditioning chilled water system through a plate heat exchanger or is supplied to an independent air-conditioning area. If the cold water is transferred to the existing air-conditioning chilled water system, the air-conditioning plate can be connected with the existing water chilling unit host in parallel, and an air-conditioning cold source is provided. If the air conditioner is supplied to an independent air conditioning area, the air conditioning plate can be used as a cold source host machine of the air conditioning area, a fan coil is adopted at the indoor tail end, and an air outlet of the fan coil faces the air conditioning area, so that cold air is continuously blown into the internal space of a room.
The single machine set can provide a cold source for free, and the indoor area of 400 plus 500 square meters can be met. The double-machine unit can meet the area of 800 plus 1000 square meters.
The device can be selected according to the requirements of users.
Example 10:
the cold region sewage waste heat recovery and reuse composite system according to embodiment 4 further includes, as an optimal scheme, an electric power and electrical appliance intelligent control system, wherein the electric power and electrical appliance intelligent control system is formed by assembling a Programmable Logic Controller (PLC), a frequency converter, a multifunctional electric power instrument, a low-voltage power distribution component, a low-voltage control component and the like, and the Programmable Logic Controller (PLC) is respectively connected with the frequency converter, the multifunctional electric power instrument, the low-voltage power distribution component, the low-voltage control component and the like.
Example 11:
in the cold region sewage waste heat recovery and reuse composite system described in embodiment 4, the electronic scale removers are respectively arranged at the cold water inlet main pipe and the cold water inlet of the unit, so that the problem that the evaporator and the condenser are easy to scale is solved, and the trend that the output and the efficiency of the unit decrease year by year is slowed down;
the main components of the scale are calcium carbonate and magnesium carbonate, and calcium and magnesium ions in water gradually form a 'single crystal' rod-shaped hexagonal prism body by taking an ion core as a center and are condensed into dense large acicular particles when the scale is heated. When water flows through the alternating electromagnetic field, the compact needle-shaped crystals are changed into loose calcite type, and under the scouring of flowing circulating water, the calcite type calcium carbonate crystals are easy to clean, so that the relatively obvious scale-resisting and descaling effects are achieved.
The functional characteristics are as follows:
scale prevention: after the new equipment is installed, no water scale is formed. Prevent scale from adhering to the container and the pipe wall.
Descaling: after old equipment is repaired, water scale automatically falls off on the inner walls of the old equipment container and the pipeline within 25 to 40 days (attention is paid to opening a filter blow-down valve in time for discharging), and the water scale is never formed after the water scale falls off completely.
And (3) sterilization: the frequency of the high-frequency electromagnetic field emitted by the bacteria in the water through the electronic descaling filter is 10 million, which is enough to kill the bacteria in the water and is good for drinking water.
Algae removal: algae in water, such as green mud, is a microorganism that is also killed and growth-slowed by high frequency electromagnetic fields. Is beneficial to the breeding industry, agricultural irrigation and plant growth.
Water quality change: through the water treatment of the electromagnetic field of the machine, the large molecular group water can be changed into small molecular group water. The human body is bathed, clothes are washed, and the surfaces of vegetables and fruits are cleaned without adding more detergents.
Example 12:
the cold region waste water and heat recovery and reuse composite system and the application of the waste water source waste heat recovery and hot water technology in the embodiment 4 can not only provide hot water for the bathing pool, but also realize dehumidification of the bathing area, and reduce the influence of discharge of damp and hot gas on the surrounding environment.
In summer, the cold source can be provided for the bathing pool or the affiliated buildings around the bathing pool, and the investment and the operation cost of the central air-conditioning equipment are replaced. The refrigeration requirement of a building with the temperature of about 2000 and 2500 square meters can be guaranteed by producing 100 tons of hot water every day and calculating 310 days every year according to the above. The investment cost of the central air-conditioning host of about 20 ten thousand yuan is saved, and the air-conditioning operation cost of about 7.4 ten thousand yuan can be saved every year.
Adopts natural energy to supplement heat. In the coldest period in winter, when the natural energy is used for heat supplement and the use requirement cannot be met, the electric heater is used for heat supplement. The titanium alloy heat exchanger is used as a heat pump evaporator, so that the process of converting sewage heat to an evaporation end of a unit through secondary refrigerant is reduced, and the electric energy consumption of a circulating motor is removed.
Example 13:
the cold region sewage waste heat recovery and reuse composite system described in the above embodiment,
the heat pump unit 1 recovers the waste heat in various discharged sewage and converts the waste heat into high-grade heat energy. The sewage is circulated in a closed manner, the sewage returns to the sewage main channel after being extracted with heat by the sewage waste heat exchanger 2, the sewage does not contact with other equipment, the environment is not polluted, high-grade heat energy can be provided for heating or domestic hot water, the water temperature is set at any value from 40 ℃ to 60 ℃, the energy efficiency ratio is up to 4.6-7.0 according to the sewage temperature, and in the cold north, almost no heat energy is generated by solar energy in winter; the COP of the air energy is below 2.0, and the sewage source has a large amount of heat which is not influenced by weather and environment, and the energy efficiency is 4.6-7.0, so that the sewage is used as a heat source, and the energy is saved. But the most difficult technical problem of sewage source heat recovery is as follows: because the sewage is utilized, the problems of frequent maintenance, short service life, low heat exchange efficiency and the like caused by blockage, corrosion and scaling of the heat exchanger are caused, and the series of problems are solved by adopting the immersion type heat exchanger aiming at the problems. Maintenance-free, cleaning-free, corrosion-resistant and high heat exchange efficiency, so that compared with a common sewage source heat pump, the energy is saved by about 30 percent, and the service life of the unit is as long as 30 years! Greatly improves the return on investment of the user!
By adopting the titanium alloy sewage waste heat exchanger, sewage directly exchanges heat with the refrigerant, so that a secondary refrigerant loop is saved, and the volume of the heat storage sewage tank is reduced by 20 percent.
The energy transfer characteristic of the refrigerant is adopted, the refrigerant is enabled to work circularly under the action of the compressor, the refrigerant is evaporated continuously to absorb heat energy in the waste water discharged after bathing, and meanwhile, the heat is released continuously in the condenser, so that the temperature of cold water flowing through the condenser is increased. The whole system only needs to rotate the compressor to enable the refrigerant to work circularly, so that the power consumption required by heating is reduced to the maximum extent, and the aims of high efficiency and energy saving are achieved.
The heat pump unit 1 heats water to 42-60 ℃ once and places the water in a heat-preservation water tank, the temperature drop of the water tank with good heat preservation is generally lower than 2-5 ℃ every day, as long as a plan is made, the working time of the heat pump unit is arranged according to the water consumption condition every day, and the amount of water produced is reduced according to the amount of water consumed every day, so that the energy consumption in the heat preservation aspect is low. As long as water is contained in the water tank, hot water is used, and the water temperature is basically stable, which is very important for the comfort of water use.
The hot water directly heated by the heat pump unit flows into the water tank from the heat pump so as to reach the temperature set by the water temperature, the main machine stops working when the water temperature in the heat-preservation water tank reaches a set upper limit, and the main machine starts when the water temperature is lower than a set lower limit, so that the hot water in the heat-preservation water tank keeps constant, and the requirement of bathing for the hot water every day is met.
Air can heat pump set: the air energy heat pump unit is driven by a small amount of electric energy to absorb a large amount of natural energy and convey the natural energy to an indoor use end, so that the air energy heat pump unit is suitable for various terminal heating, refrigeration, bathing hot water, domestic hot water and the like.
Operating principle of air energy heat pump unit
The heat exchanger of the air energy heat pump unit is placed outdoors, a large amount of natural energy such as the sun, air, heat, wind, rain, snow, haze and the like in the nature is absorbed through the medium, then the medium after absorbing the energy is conveyed to the host machine, the medium is compressed by the compressor in the host machine and becomes high-temperature high-pressure gas, the high-temperature high-pressure gas enters the heat exchanger again for heat exchange, the medium after heat exchange is throttled and decompressed by the expansion valve, and then enters the outdoor heat exchanger for absorbing the energy, so that the circulation is repeated, thereby obtaining a large amount of energy, and the air energy heat pump unit is widely applied to various places.
Compared with air, the air energy-saving energy-
Natural energy and air energy can be under the same low temperature operating mode, when having the sun, absorb sunshine heat energy and make refrigerating system's evaporating temperature can improve, and the efficiency of unit, air source heat pump improve about 40%, when not having the sun, the unit need not to defrost, heating performance system improves about 20% than the air source, need not to change the frost at all at low temperature adverse circumstances unit, can save a large amount of electric energy. And the continuous heat supply of the unit is ensured.
The problem of defrosting at low temperature is solved
The natural energy heat pump heat exchanger is made of aviation aluminum materials and is formed in one step, the surface of the natural energy heat pump heat exchanger is provided with a high-molecular matte coating, the surface of the natural energy heat pump heat exchanger has a self-cleaning function, and the heat absorption end absorbs natural energy in all weather without defrosting.
Fourth step completely eradicates the anti-freezing problem
The natural energy heat pump adopts a split structure design, the heat exchanger is outdoor, the host machine and the use side are indoor, and the host machine and the use side circulate through media, so that the freezing hidden danger at low temperature is avoided.
Design without fan and zero fan noise
The outdoor heat exchanger of the natural energy heat pump is completely silent without the running of a fan, so that the problem of fan noise of the air energy heat pump is thoroughly avoided.
Sixthly, remote intelligent control
The system can remotely control the start and stop of the unit, detect the running condition of the unit in real time, adjust the unit as required and inquire the running record of the unit at any time and any place.
High-frequency electronic scale remover
The working principle is as follows: the main components of the scale are calcium carbonate and magnesium carbonate, and calcium and magnesium ions in water gradually form a 'single crystal' rod-shaped hexagonal prism body by taking an ion core as a center and are condensed into dense large acicular particles when the scale is heated. When water flows through the alternating electromagnetic field, the compact needle-shaped crystals are changed into loose calcite type, under the scouring of flowing circulating water, the calcite type calcium carbonate crystals are easy to clean, and the relatively obvious scale-resisting and descaling effect is achieved,
the functional characteristics are as follows:
scale prevention: after the new equipment is installed, no water scale is formed. Prevent scale from adhering to the container and the pipe wall.
Descaling: after old equipment is repaired, water scale automatically falls off on the inner walls of the old equipment container and the pipeline within 25 to 40 days (attention is paid to opening a filter blow-down valve in time for discharging), and the water scale is never formed after the water scale falls off completely.
And (3) sterilization: the frequency of the high-frequency electromagnetic field emitted by the bacteria in the water through the electronic descaling filter is 10 million, which is enough to kill the bacteria in the water and is good for drinking water.
Algae removal: algae in water, such as green mud, is a microorganism that is also killed and growth-slowed by high frequency electromagnetic fields. Is beneficial to the breeding industry, agricultural irrigation and plant growth.
Water quality change: through the water treatment of the electromagnetic field of the machine, the large molecular group water can be changed into small molecular group water. The human body is bathed, clothes are washed, and the surfaces of vegetables and fruits are cleaned without adding more detergents.
The machine occupies small space and consumes little power (5 degrees per month).
Can not only remove scale, but also filter, and completely solve two major problems in water.
One machine has multiple functions and can be permanently installed at one time.
The solar energy water heater is suitable for civil floor heating, wall-mounted furnaces, solar energy, water heaters, air energy and the like; commercial hotels, guesthouses, bathing pools, small and medium-sized boilers and the like; industrial cooling towers, heat exchange stations, chemical industry, food, oil refining, paper making, injection molding and other circulating water systems.
The water purifier is directly connected to the water inlet of tap water of a user, can replace a pre-filter, a water softener and a water purifier, and is an optimal updated product of full-house water purification.
Hair filter
The hair filter (hair collector) is a necessary device of the heat recovery system, is also an existing device, can remove hair in the bath pool sewage and can ensure that garbage in the using process enters the sewage tank and the water pump, so that the normal operation of the whole system is guaranteed. The filter mainly comprises a connecting pipe, a cylinder body, a filter basket, a flange cover, a fastener and the like, the equipment can remove solid particles in liquid and can also protect the normal work of subsequent equipment, when fluid enters the filter cylinder with a filter screen with a certain specification, hair and solid impurity particles are blocked in the filter basket, and clean fluid flows out from a filter outlet through the filter basket.
When the hair collector is used for a certain time, the resistance of water is increased due to the blockage of dirt, and then the cover of the hair collector needs to be opened, the filter cartridge in the hair collector is taken out and cleaned, and then the hair collector is used continuously. When the filter basket needs to be cleaned, the screw plug at the bottom of the main pipe is loosened by a wrench, fluid is drained, the flange cover is detached, and the filter basket is taken out. The cleaning agent can be loaded again after cleaning, and the use and maintenance are very convenient.
Design calculation
A05 apartment bath supplies hot water regularly. The male bath area is provided with 43 showers, the female bath area is provided with 39 showers, and the total number of the showers is 82. The system is calculated according to 2000 students' accommodation numbers.
(1) Design hour hot water quantity qrh
Taking 260L/h (40 ℃) of water consumption qh for shower in one hour;
taking 82 from the number n0 of showers;
taking the percentage b of the sanitary ware used at the same time as 100%;
qrh＝qhn0b＝260×67×100％＝17420L/h＝17.42m3/h＝17.42t/h
(2) design daily hot water amount qrd;
the duration of the hot water quantity is designed to be 2h, qrd＝qrh×2h＝34.84t/h(40℃)
(3) Design hourly heat consumption Qh
The temperature tr of the hot water is 40 ℃;
taking the cold water at the temperature of tl 10 ℃;
the hot water density rho is 0.993 kg/L;
the specific heat C of the water is 4.187kJ/(kg DEG C);
Qh＝qhn0b(tr-t1)ρrC＝qrh(tr-t1)ρrC＝17420×(40-10)×0.993×4.187
＝17420×124.73kJ/h＝217296.6kJ/h＝603.6W
Qh＝∑qhn0b(tr-tl)ρrC＝qrh(tr-tl)ρrC＝21320×(40-10)×0.993×4.187＝21320×124.73kJ/h
Qh＝∑qhn0b(tr-tl)ρrC＝qrh(tr-tl)ρrC＝21320×124.73＝2659243.6kJ/h＝738.7kw
(4) design hourly heat supply Qg
2 LTWZP-12R sewage source heat pump units are selected, wherein the heat supply of each unit is 52.5kW, and the Qg is 105kW
(5) Effective volume Vr of hot water tank
Designing the hour heat consumption duration T to be 2 hours;
the effective heat storage volume coefficient eta is 0.80;
the safety factor k2 is 1.20;
the temperature tr of the hot water is 40 ℃;
taking the cold water at the temperature of tl 10 ℃;
the hot water density rho is 0.993 kg/L;
the specific heat C of the water is 4.187kJ/(kg DEG C);
Vr＝(2659243.6-2×52.5×3600)×0.024052＝54868L＝54.87m3
the hot water tank is converted into hot water at 55 ℃, the effective volume of the hot water tank is 36.58m3, and the existing 1 stainless steel water tank with the nominal volume of 40m3 is utilized.
(6) Effective volume Vw of sewage tank
The coefficient of performance COP of the heat pump is 4;
the temperature difference delta tju between the sewage inlet and the sewage outlet is 35-5-30 ℃;
taking 1kg/L of sewage density rho j;
the specific heat C of the water is 4.187kJ/(kg DEG C);
taking the temperature tr of hot water to be 60 ℃;
taking the cold water at the temperature of tl 10 ℃;
the density rhor of the hot water is 0.983 kg/L;
(7) Area Fj of heat exchanger in sewage tank
The coefficient of performance COP of the heat pump is 4;
the coefficient 1 influencing the heat transfer effect is 0.8;
the heat transfer coefficient K of the heat exchanger is 9200kJ/(m2 DEG C.h);
calculating the temperature difference delta tj, and taking 5 ℃;
(8) means for supplementing heat
According to the operation data analysis of the wastewater waste heat recovery units in A02 apartment, B06 apartment, A11 apartment and A15 apartment for many years, the hot water quantity generated by the system of the units in cold winter is only equivalent to 80% of nameplate parameters, and is equivalent to 12 tons of underheat. In the unfavorable stage in winter, heat is supplemented according to 12 tons of water supply quantity every day, and the hourly flow is 0.5 ton in conversion.
1 LTZXD-20L air energy heat pump unit (48.7 kW each) and 8 fan coil pipes (six 12.4kW and two 9.15 kW) are selected.
Planar arrangement
A common bathroom floor plan of a05 apartment. 2 sewage source heat pump units of 52.5kW are selected, a 48.7kW air energy heat pump unit (matched with 1 heat-supplementing cold water tank of 10m 3) is added (2 spare 1 is used), 1 glass fiber reinforced plastic sewage tank with an effective volume of 48.55m3 (the effective volume can only be 40m3 at present), 1 stainless steel water tank with a nominal volume of 40m3 (hot water at 55 ℃) and 1 stainless steel water tank with a nominal volume of 22m3 (hot water at 40 ℃) are converted into hot water with a total volume of 42 ℃ of 82m3, 2 heat-supplementing hot water supply pumps, 1 electric heater and 8 fan coil units 15.
Example 14:
the cold region sewage waste heat recovery and reuse composite system described in the above embodiment,
a17 apartment student bath of Harbin university (namely A17 apartment) has one existing student bath, wherein 37 showers are arranged in a male bath area, 30 showers are arranged in a female bath area, a heat source is a gas boiler at the initial stage of bath construction, and the heat source is an electric water heater at present. The daily hot water demand of the bathing pool is 30-40 tons, and the hot water temperature is 40-42 ℃. In order to promote the construction of a conservation-oriented campus and further meet the requirements that students can take a bath and supply domestic hot water to a dormitory washroom in the morning and evening without going out of the dormitory (the total hot water requirement per day is 60 tons), and the problem of queuing in a bath pool in a peak period is solved, the waste heat recovery composite system of the A17 apartment bath pool is improved (the maximum bath hot water supply capacity of the system is 90 tons in summer and 60 tons in winter).
If the original gas-fired boiler is dismantled according to field conditions, the position is changed into a sewage tank, the built sewage tank can only reach 35 cubic meters and has a volume of 15 cubic meters, and the design requirements cannot be met, so that an air source heat pump unit is installed, an air suction inlet and an air outlet of the air source heat pump are arranged in a garage, the area of the garage is large, a heat source required by the unit in operation is extracted in the garage, the temperature drop cannot exceed 2 ℃, and the normal operation in the garage cannot be influenced.
Electronic scale removers are arranged at a main water supply port of the system and a cold water side water inlet of the unit (two-stage arrangement, the main water supply port is in the first stage, and the water inlets of the units are in the second stage), so that the problem that the evaporator and the condenser are easy to scale is solved, and the tendency of COP (coefficient of performance) of the unit to decrease year by year is relieved.
The sewage tank redesigns water distribution and water collecting system, guarantees that low temperature sewage discharges fast, and high temperature sewage fully exchanges heat.
A hair collector is arranged on a sewage pipeline at the inlet of the sewage tank and is used for removing hair in the bath sewage and enabling garbage in the bath process to enter the sewage tank and the water pump so as to ensure the normal operation of the whole heat recovery system.
The A17 apartment adopts 2 sewage source heat pumps (single machine nominal heating capacity 52.5Kw) and 1 air source heat pump (single machine nominal heating capacity 41.2 Kw).
Air source heat pump unit
Aiming at the actual climate condition of winter operation in the north, the defrosting problem of the low-temperature heat pump is broken through, a new thought is provided for improving the heat pump technology and the defrosting control technology, an intelligent video monitoring defrosting system is developed, defrosting is carried out in the presence of frost, frost is not removed, energy is saved by about 20% compared with the conventional ultralow-temperature air source heat pump in the market, and the developed ultralow-temperature air source refrigerating and heating machine has multiple purposes of heating, refrigerating and hot water. The blank of air source heating in extremely cold regions of minus 30 ℃ in northeast and northwest is filled, the defrosting of the ultralow-temperature air source heat pump in the market is realized by controlling a defrosting program according to temperature and time, when the environment humidity is high, the heat exchanger is full of frost after the heat pump operates for 20 minutes, but the heat pump enters the defrosting program after the heat pump operates for 45-55 minutes, the heat pump has little efficiency in about 30 minutes, the heat exchanger does not frost at all when the low-temperature air humidity is low, but the heat pump also enters the defrosting program after the heat pump operates for 45-55 minutes, energy is wasted, heat on the use side is used for defrosting the outdoor heat exchanger instead of heating, and the heat requirement is hardly met in low-temperature severe weather, namely, the heat pump usually goes one step and goes half step. The developed intelligent defrosting system thoroughly avoids the loss of worthless value, so that the energy is saved more.
Design calculation
A17 apartment bath supplies hot water regularly. 37 showers are arranged in the male bath area, 30 showers are arranged in the female bath area, and the total number of the showers is 67. The system is calculated according to 2000 students' accommodation numbers.
(1) Design hour hot water quantity qrh
Taking 260L/h (40 ℃) of water consumption qh for shower in one hour;
taking 67 as the number n0 of showers;
taking the percentage b of the sanitary ware used at the same time as 100%;
qrh＝qhn0b＝260×67×100％＝17420L/h＝17.42m3/h＝17.42t/h
qrh＝∑qhn0b＝260×67×100％＝17420L/h＝17.42m3/h＝17.30t/h
(2) design daily hot water amount qrd;
the duration of the designed hour hot water amount is 2h, and qrd is 34.6t/h (40℃)
(3) Design hourly heat consumption Qh
The temperature tr of the hot water is 40 ℃;
taking the cold water at the temperature of tl 10 ℃;
the hot water density rho is 0.993 kg/L;
the specific heat C of the water is 4.187kJ/(kg DEG C);
Qh＝qhn0b(tr-t1)ρrC＝qrh(tr-t1)ρrC＝17420×(40-10)×0.993×4.187
＝17420×124.73kJ/h＝217296.6kJ/h＝603.6W
Qh＝∑qhn0b(tr-tl)ρrC＝qrh(tr-tl)ρrC＝17420×(40-10)×0.993×4.187＝17420×124.73kJ/h
Qh＝∑qhn0b(tr-tl)ρrC＝qrh(tr-tl)ρrC＝17420×124.73＝2172796.6kJ/h＝603.6kW
(4) design hourly heat supply Qg
2 LTWZP-12R sewage source heat pump units are selected, wherein the heat supply of each unit is 52.5kW, and the Qg is 105kW
(5) Effective volume Vr of hot water tank
Designing the hour heat consumption duration T to be 2 hours;
the effective heat storage volume coefficient eta is 0.80;
the safety factor k2 is 1.20;
the temperature tr of the hot water is 40 ℃;
taking the cold water at the temperature of tl 10 ℃;
the hot water density rho is 0.993 kg/L;
the specific heat C of the water is 4.187kJ/(kg DEG C);
Vr＝(2172796.6-2×52.5×3600)×0.024052＝43168L＝43.17m3
the hot water is converted into hot water at 55 ℃, the effective volume of the hot water tank is 28.78m3, and 1 stainless steel water tank with the nominal volume of 40m3 is arranged.
(6) Effective volume Vw of sewage tank
The coefficient of performance COP of the heat pump is 4;
the temperature difference delta tju between the sewage inlet and the sewage outlet is 35-5-30 ℃;
taking 1kg/L of sewage density rho j;
the specific heat C of the water is 4.187kJ/(kg DEG C);
taking the temperature tr of hot water to be 60 ℃;
taking the cold water at the temperature of tl 10 ℃;
the density rhor of the hot water is 0.983 kg/L;
(7) Area Fj of heat exchanger in sewage tank
The coefficient of performance COP of the heat pump is 4;
the coefficient 1 influencing the heat transfer effect is 0.8;
the heat transfer coefficient K of the heat exchanger is 9200kJ/(m2 DEG C.h);
calculating the temperature difference delta tj, and taking 5 ℃;
(8) means for supplementing heat
According to the operation data analysis of the wastewater waste heat recovery units in A02 apartment, B06 apartment, A11 apartment and A15 apartment for many years, the hot water quantity generated by the system of the units in cold winter is only equivalent to 80% of nameplate parameters, and is equivalent to 12 tons of underheat. In the unfavorable stage in winter, heat is supplemented according to 12 tons of water supply quantity every day, and the hourly flow is 0.5 ton in conversion.
1 LTFXP-15RD air source heat pump unit (41.2 kW each and air temperature > 12 ℃) and 6 fan coil pipes (four 12.4kW and two 8.1 kW) are selected.
Planar arrangement
A common bathroom floor plan of a17 apartment. 2 sewage source heat pump units of 52.5kW and 1 air source heat pump unit of 41.2KW (1 heat supplementing cold water tank of 10m3 is matched) are selected (2 is prepared with 1), 1 glass fiber reinforced plastic sewage tank (4000 multiplied by 3000 multiplied by 2500) with nominal volume of 30m3, 1 stainless steel hot water tank (7000 multiplied by 3000 multiplied by 2500) with nominal volume of 52.5m3, 2 heat supplementing hot water supply pumps and 6 fan coils (clamping type).
Example 15:
the cold region sewage waste heat recovery and reuse composite system described in the above embodiment,
in winter in severe cold and cold areas, the outdoor temperature is extremely low or the temperature is not started in spring and autumn, the indoor temperature is relatively low, the temperature of bath water is greatly reduced, the system generates a phenomenon of insufficient heat, the temperature in sewage is suddenly reduced by 8-10 ℃, and the maximum insufficient heat of the whole system reaches 25-30%, so that the system cannot normally operate. Therefore, aiming at the serious underheat phenomenon, firstly, setting the relative protection temperature to be reduced by 1 degree from 5 degrees, starting a heat recovery system of a fan coil unit, increasing the temperature of tap water by 2-4 degrees, recovering about 20 percent of the underheat of the system, and leading the rest 10 percent of the underheat to pass through a hot sewage distribution device and a cold sewage uniform recovery device which are additionally arranged in the system, so that the sewage with high temperature is uniformly distributed on the middle upper layer of a heat exchanger sewage tank and a secondary refrigerant arranged in the middle upper layer heat exchanger to carry out heat exchange. The heat exchanger is arranged according to a temperature gradient change mode, so that the secondary refrigerant in the heat exchanger takes away heat in sewage layer by layer, the sewage on the upper layer falls into the bottom layer of the sewage tank along with the gradual temperature reduction, and is discharged in an overflow mode by the recovery device, and the heat loss is avoided.
According to the practical situation of A05 apartment, the sewage tank can only achieve 40 tons, and the normal design should be 50 tons. Because the bath pool space is large, the number of people for bathing is small, the lack of heat is large, the temperature of sewage entering a bathing sewage tank can be reduced to 26 ℃ in winter, the sewage can not be normally used, and the heat supplement is considered to be 20-30% (the heat supplement calculation is shown in a calculation book), so that the natural energy is adopted for heat supplement. In the coldest period in winter, when the natural energy is used for heat supplement and the use requirement cannot be met, the electric heater is used for heat supplement.
The transformation solves the problem that the sewage source heat pump is insufficient in heat in winter while absorbing past experience, and natural resources such as solar energy and air are used as heat sources (used as auxiliary heat supplementing heat sources in winter), so that the energy-saving effect is further improved, and the stability of the system is enhanced.
The sewage source heat pump system adopts the titanium alloy heat exchanger, sewage and the refrigerant directly exchange heat, a secondary refrigerant loop is saved, the corrosion resistance is realized, the heat exchange efficiency is high, and the volume of the heat storage sewage tank is greatly reduced. The titanium alloy heat exchanger is used as a heat pump evaporator, so that the process of converting sewage heat to an evaporation end of a unit through secondary refrigerant is reduced, and the electric energy consumption of a circulating motor is removed.
The direct-heating type heat pump special for bathing heats water to 42-60 ℃ once and places the water in a heat-insulation water tank, the temperature drop of the water tank with good heat insulation is generally lower than 2-5 ℃ every day, the working time of the machine is arranged according to the water consumption condition every day on the premise of accurate calculation and planning, and hot water is produced according to the water consumption, so that the energy consumption in the heat insulation aspect is very low. As long as water is contained in the water tank, hot water is used, and the water temperature is basically stable, so that the comfort of bathing water is met.
The hot water directly heated by the heat pump unit flows into the water tank from the heat pump to reach the temperature set by the water temperature, the main machine stops working when the water temperature in the heat-preservation water tank reaches a set upper limit, and the main machine starts when the water temperature is lower than a set lower limit, so that the hot water in the heat-preservation water tank keeps constant for 24 hours, and the requirement of bathing on the hot water every day is met.
Operating process
In the operation process of the system, the system is mainly divided into three operation processes, namely a sewage side stroke, a secondary refrigerant side stroke and a bathing hot water side stroke according to the difference of media and the difference of a heat exchange process, and the whole system automatically operates to realize the recycling of sewage and waste heat.
1. Sewage side stroke
(1) The bath shower hot water temperature is generally 38-41 ℃.
(2) After showering, sewage enters the heat-preservation water collecting pit through the flowing water channel, and is pumped into the heat-preservation sewage tank by the sewage lifting pump, wherein the temperature of the sewage is about 30-35 ℃.
(3) Through sewage distributor, make the sewage of high temperature get into the sewage case with the efflux mode, even distribution is on the heat exchanger, produces and vibrates, strengthens the heat transfer effect. When the sewage is at a high temperature, the sewage exchanges heat with secondary refrigerant arranged in an upper-layer heat exchanger in the sewage tank, the temperature is gradually reduced due to the absorption of the heat of the sewage, the specific gravity of the sewage is increased, and the sewage falls into the bottom layer of the sewage tank, so that the temperature gradient is generated. The low-temperature sewage which is absorbed heat sinks into the lower layer and is discharged in an overflow mode through the recovery device under the pressure action of the new high-temperature sewage, and the heat loss is avoided.
(4) When the temperature of the discharged sewage is higher than 10.5 ℃, two sets of units are started simultaneously, when the temperature of the sewage is lower than 7 ℃, one set of units stops running, when the temperature of the sewage is lower than 4 ℃, the system generates low-temperature alarm, all the sets stop running, and the system does not work. The system is started and stopped repeatedly, and the control system runs automatically. (typically, the heat source temperature should not be below 2 ℃ to avoid freezing the evaporator.)
2. Coolant side stroke
(1) The heat exchanger is soaked in the sewage tank, the secondary refrigerant in the heat exchanger is pumped into the heat exchanger from the outlet of the unit through the circulating water pump, enters from the bottom of the heat exchanger, is heated by sewage forming a temperature gradient in the sewage tank in a multi-pipe layer mode, and the high-temperature secondary refrigerant flows out from the upper layer of the heat exchanger.
(2) The secondary refrigerant enters the unit evaporator from the outlet of the heat exchanger, the heat in the secondary refrigerant is absorbed by the refrigerant in the unit through the plate exchange, and the low-temperature secondary refrigerant returns to the inlet at the bottom of the heat exchanger to circularly absorb heat, so that the heat transfer process is ensured.
(3) In summer, the low-temperature secondary refrigerant bypass exchanges heat with hot air in the bedroom through the plate heat exchanger, absorbs heat in the air, reduces the temperature in the bedroom, and achieves the refrigeration effect. The refrigerating medium directly returns to the evaporator of the unit after taking away heat, and is circulated to run after releasing heat through the unit.
3. Side stroke of hot water for bathing
(1) Under the action of the pressure of the pipe network, tap water with the average temperature of 10.7 ℃ firstly enters a fan-coil unit to recover the heat released by the condensation of bath steam in a bathroom, so that the temperature of the tap water is raised by 2-4 ℃.
(2) The preheated tap water enters the inlet of the unit, the heat source in the sewage of the energy storage sewage tank is brought into the unit by the unit secondary refrigerant to be evaporated, and the temperature of the tap water is increased to a set value by cooling and releasing heat under high pressure of the condenser through the work of the refrigeration compressor, so that the bathing hot water is produced.
The set value of the water temperature is not more than 60 ℃ and not less than 40 ℃, when the water temperature exceeds the temperature value of the overtemperature value, the monitoring system generates a hot water overtemperature alarm, the unit is stopped, and when the water temperature is restored to the temperature value of the set value, the monitoring system cancels the hot water overtemperature alarm, and the unit is restored to the normal working state.
In winter, due to the fact that the temperature of sewage entering the bathing sewage tank is reduced, underheating can be generated in the system, and at the moment, a natural energy unit or an air source unit is adopted for heat supplement. The monitoring and monitoring system starts the operation of the heat supplementing unit in advance according to the water shortage condition of the heat preservation hot water tank or the set time, the running of the tap water in the cold water tank is guaranteed through cyclic heating, when the water temperature reaches the set temperature, the unit stops running, meanwhile, the liquid level in the heat preservation hot water tank is detected, if the liquid level is lower than the water supplementing liquid level, the medium temperature water pump is started, the hot water in the cold water tank is guaranteed to be injected into the heat preservation hot water tank, and when the liquid level in the heat preservation hot water tank reaches the upper limit or the liquid level in the cold water. The circulation work basically solves the problem of sewage heat source loss, and provides bath hot water for a bathroom.
When a bathing peak is reached, the two sewage source units are started simultaneously, after the bathing peak is passed, the number of people for bathing is gradually reduced, the quantity of heat which can be recovered is reduced, the COP value of the system is gradually reduced, at the moment, the monitoring and monitoring system automatically stops the operation of one unit, the power consumption of the system is reduced, the heat recovery efficiency is improved, and the unit automatically stops operating until the heat-preservation hot water tank is full or the heat in the sewage tank is completely absorbed, and at the moment, the whole system does not work any more.
When the water temperature in the heat-preservation water tank reaches the set upper limit, the unit stops working, and when the water temperature is lower than the set lower limit, the unit starts, and the circulation work is carried out, so that the hot water in the heat-preservation water tank keeps constant for 24 hours.
(3) High-temperature water in the heat-preservation hot water tank is mixed with tap water in a certain proportion into low-temperature water with the temperature of about 40 ℃ through the water mixer, the low-temperature water is injected into the heat-preservation water mixing tank, after the heat-preservation water mixing tank is filled with the high-temperature water, the water mixing pump stops running automatically, and the hot water can be directly used for bathing.
TABLE 2-1 technical parameters of electric power and electric appliance control cabinet
Since 2016, the first set of system is put into use in A02 apartment bathing centers of Harbin university of industry, the system is optimized continuously, the running condition is stable, and the energy-saving effect is obvious.
Analysis of economic benefits
1.5.1. Energy consumption comparison of sewage source water heating unit and other water heating equipment
1.5.2. The waste water waste heat recovery subsystem and other hot water supply equipment are compared in performance:
1.5.3. comparing the annual operating costs of the common hot water preparation method (according to 100 tons of bath hot water at 40 ℃ per day)
Electricity, water, gas and labor rates executed in 2019:
cost calculation for various heating modes (tap water 30 ℃ heating temperature difference)
The application of the sewage source waste heat recovery hot water technology can not only provide hot water for the bathing pool, but also realize dehumidification of the bathing area and reduce the influence of damp-heat gas emission on the surrounding environment.
In summer, the cold source can be provided for the bathing pool or the affiliated buildings around the bathing pool, and the investment and the operation cost of the central air-conditioning equipment are replaced. The refrigeration requirement of a building with the temperature of about 2000 and 2500 square meters can be guaranteed by producing 100 tons of hot water every day and calculating 310 days every year. The investment cost of the central air-conditioning host of about 20 ten thousand yuan is saved, and the air-conditioning operation cost of about 7.4 ten thousand yuan can be saved every year.
1.5.4. Energy-saving and environment-friendly effect
The energy consumption conditions of the bathing pool all year round are compared according to the calculation of 100 tons of hot water in the bathing pool every day:
1.1. operational data statistics
Since 2016, the first system is put into use in A02 apartment bathing centers of Harbin university of industry, the system is optimized continuously, the operation condition is stable, and the energy-saving effect is obvious.
A11 apartment of Harbin university of industry A11 and A15 apartment bathing centers are newly built for use in 2018, and the operation data statistics in 2019 are as follows:
2016-plus-2017-year great-energy-saving transformation bath data comparison and analysis
Equipment investment comparison and economic analysis of various operation modes for producing bath hot water (universities)
Note:
1. the analysis only considers the wages of the operator, the fuel cost and the electricity cost (excluding the illumination) of the bath hot water production process.
2. Because the heat pump is guaranteed for 3 years, the gas furnace is guaranteed for one year, the maintenance cost after the heat pump is maintained for three years is uncertain and never compared, and the heat pump maintenance cost is less than the gas furnace maintenance cost.
3. The economic analysis shows that the operation cost of the gas or electricity is more than that of the gas, and the operation cost of the heat pump is the least.
4. The sum of the running expenditure and the residual expense saved by the heat pump unit compared with the gas furnace can reach the recovery cost of 3 years of the design capacity, for example, the recovery cost of 5 years is calculated according to the actual load.
Claims (10)
1. A waste water and waste heat recycling composite system in a cold area is characterized by comprising a waste water and waste heat recycling subsystem, wherein the waste water and waste heat recycling subsystem comprises a heat pump unit, the heat pump unit is connected with a waste water and waste heat exchanger in a sewage tank body through a pipeline, the waste water and waste heat exchanger is connected with the heat pump unit through a pipeline, a secondary refrigerant is filled in the pipeline, the sewage tank body in the sewage tank body is connected with a sewage pump through a pipeline, the sewage pump discharges sewage, a bath pool water discharge pipe is connected with a hair collector, the hair collector is connected with a sewage water inlet pipe through a pipeline, the sewage water inlet pipe is connected with a sewage distribution pipe in the sewage tank body, the heat pump unit is connected with a high-temperature water pump through a pipeline, the high-temperature water pump is connected with a first heat preservation water tank through a pipeline, the water mixer is connected with a second heat-preservation water tank through a pipeline, and the second heat-preservation water tank is connected with a hot water output pipeline; the tap water inlet pipe is connected with the water mixer through a pipeline; the tap water inlet pipe is connected with the fan-coil unit through the first electronic scale remover, the fan-coil unit is connected with the second electronic scale remover through a pipeline, the second electronic scale remover is connected with the heat pump unit through a pipeline, and the heat pump unit is connected with the first heat-preservation water tank through a pipeline; the fan coil unit is connected with the first heat-preservation water tank through a pipeline; the running water inlet tube passes through the tube coupling cold water storage cistern, and the cold water storage cistern passes through the tube coupling heat pump, and the heat pump passes through the tube coupling circulating pump, the circulating pump passes through the tube coupling drainage jar, the drainage jar passes through tube coupling solar collector, solar collector passes through the tube coupling air energy heat pump set, and the air energy heat pump set passes through the tube coupling water pump, and the water pump passes through the tube coupling cold water storage cistern, the cold water storage cistern passes through the tube coupling medium temperature water pump, the medium temperature water pump passes through tube coupling holding water tank and heat pump.
2. The cold region sewage waste heat recovery and reuse composite system according to claim 1, wherein the cold water tank is connected with a ground heat pump through a pipeline, and the ground heat pump is connected with a water pump through a pipeline.
3. The cold region sewage waste heat recovery and reuse composite system according to claim 1, wherein the fan-coil unit is connected to an electric heater through a pipeline, and the electric heater is connected to the first heat-preservation water tank through a pipeline.
4. The cold region waste water and heat recovery and reuse composite system according to claim 1, wherein a set of diversion partition plates are installed in the inner tank body of the sewage tank, the diversion partition plates are longitudinally arranged in parallel, a set of waste water and heat exchangers are installed in the inner tank body of the sewage tank, the waste water and heat exchangers are transversely arranged in parallel, a sewage distribution pipe is arranged at the top of the waste water and heat exchangers, the sewage distribution pipe is connected with a sewage inlet pipe, the waste water and heat exchangers are connected with a waste water and heat communicating pipe, the lower part of the waste water and heat communicating pipe is connected with a water inlet pipe, the water inlet pipe is connected with a heat pump unit, the upper part of the waste water and heat communicating pipe is connected with a water outlet pipe, the water outlet pipe is connected with the heat pump unit, a distributed sewage recovery pipe is installed at the bottom of the, and a sewage tank heat-insulating material is arranged between the sewage tank inner box body and the sewage tank outer box body.
5. The cold region sewage waste heat recovery and reuse composite system according to claim 4, wherein the sewage waste heat exchanger is assembled by a group of heat exchange tubes installed in parallel, each group of heat exchange tubes is composed of a plurality of tubes installed in parallel from top to bottom, and a plurality of groups of heat exchange tubes are installed in parallel to ensure that the heat exchangers are fully distributed in the heat preservation sewage tank; a sewage distributing pipe is arranged above the interior of the box body in the sewage box, so that high-temperature sewage enters the sewage box in a jet mode, and the sewage distributing pipe is uniformly distributed above the sewage waste heat exchanger to generate vibration and strengthen the heat exchange effect; the sewage is heat-exchanged with the secondary refrigerant in the sewage waste heat exchanger at the middle upper layer in the sewage tank at high temperature, the temperature is gradually reduced due to the absorption of the heat of the sewage, the specific gravity of the sewage is increased and falls into the bottom layer of the sewage tank to generate a temperature gradient, the heat-absorbed low-temperature sewage sinks into the lower layer and is discharged in an overflow mode through the distributed sewage recovery pipe under the action of new high-temperature sewage pressure, and the loss of heat is avoided.
6. The cold region sewage waste heat recovery and reuse composite system according to claim 5, wherein the low temperature coolant enters from the inlet at the bottom of the water inlet pipe at a certain flow rate, and exchanges heat with the sewage with temperature gradient in the sewage tank in the form of a plurality of pipe layers, the higher the flow rate, the more remarkable the heat transfer effect, the high temperature coolant flows out from the outlet at the upper layer of the water outlet pipe of the sewage waste heat exchanger, enters the unit evaporator, the heat in the coolant is absorbed by the coolant in the unit through conversion, and the low temperature coolant returns to the inlet at the bottom of the water inlet pipe to circularly absorb heat, thereby ensuring the heat transfer process.
7. The cold region sewage waste heat recovery and reuse composite system according to claim 6, wherein the sewage waste heat exchanger is of an immersion type structure, the sewage waste heat exchanger is immersed in sewage to clean dirt, the sewage distribution pipe enables high-temperature sewage to generate transverse scouring and temperature gradient when entering the sewage tank, so that the high-temperature sewage can be ensured to exchange heat uniformly and sufficiently, the low-temperature sewage which is absorbed heat sinks into a lower layer, and the sewage is discharged in an overflow mode through the recovery device, namely the distributed sewage recovery pipe under the pressure action of new high-temperature sewage, so that heat loss is avoided.
8. The waste heat recovery and reuse composite system for sewage in cold areas as claimed in claim 7, wherein the diversion partitions are designed to be distributed in the sewage tank in a staggered manner, increase the flow speed of sewage, prolong the flow time, perform sufficient heat exchange, and ensure that the sewage with the lowest temperature is discharged uniformly and rapidly; the lower part of the sewage waste heat exchanger is provided with a distributed sewage recovery pipe, so that low-temperature sewage is quickly discharged; meanwhile, the secondary refrigerant with a certain flow velocity enters the bottom inlet of the sewage waste heat exchanger, flows through the whole sewage waste heat exchanger from bottom to top, and performs sufficient heat exchange with the sewage passing in the reverse direction, so that the heat obtained by the secondary refrigerant is maximized, and the heat recovery efficiency is maximized.
9. The cold region sewage waste heat recovery and reuse composite system according to claim 1, further comprising a heat safeguard subsystem, wherein the heat safeguard subsystem comprises a fan-coil unit, the fan-coil unit is connected with an electric heater through a pipeline, and the electric heater is connected with the first heat preservation water tank through a pipeline.
10. The waste heat and sewage recycling composite system for cold regions as claimed in claim 1, further comprising a smell removing and sewage draining subsystem, wherein the smell removing and sewage draining subsystem comprises an air duct and a low-noise ventilator, and the air duct is connected with the low-noise ventilator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010836073.XA CN111928313A (en) | 2020-08-19 | 2020-08-19 | Compound system for recycling waste heat and sewage in cold area |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010836073.XA CN111928313A (en) | 2020-08-19 | 2020-08-19 | Compound system for recycling waste heat and sewage in cold area |
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| CN111928313A true CN111928313A (en) | 2020-11-13 |
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| CN202010836073.XA Pending CN111928313A (en) | 2020-08-19 | 2020-08-19 | Compound system for recycling waste heat and sewage in cold area |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762639A (en) * | 2021-01-08 | 2021-05-07 | 青岛海信日立空调系统有限公司 | Heat pump system and control method |
| CN114963291A (en) * | 2021-06-29 | 2022-08-30 | 青岛海尔新能源电器有限公司 | Heating machine control method, device, equipment and storage medium |
-
2020
- 2020-08-19 CN CN202010836073.XA patent/CN111928313A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762639A (en) * | 2021-01-08 | 2021-05-07 | 青岛海信日立空调系统有限公司 | Heat pump system and control method |
| CN112762639B (en) * | 2021-01-08 | 2023-06-13 | 青岛海信日立空调系统有限公司 | Heat pump system and control method |
| CN114963291A (en) * | 2021-06-29 | 2022-08-30 | 青岛海尔新能源电器有限公司 | Heating machine control method, device, equipment and storage medium |
| CN114963291B (en) * | 2021-06-29 | 2023-11-17 | 青岛海尔新能源电器有限公司 | Heating machine control method, device, equipment and storage medium |
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