CN201779767U - Heat pump heating system for comprehensive recovery of waste heat from hot spring wastewater - Google Patents

Abstract

The utility model discloses a hot spring waste water waste heat comprehensive recovery heat pump heating system, its characterized in that: an overflow pipe of the thermal spring pool is connected with the first heat exchanger and then connected with the sewage tank; the sewage tank is connected with an evaporator of the heat pump through a sewage pump through a pipeline to exchange heat and then is connected with the sewage tank; the water inlet pipe of the tap water is connected with the first heat exchanger and then connected with the domestic hot water tank; the overflow pipe of the thermal spring pool is provided with a branch overflow pipe which is connected with a second heat exchanger and then connected with the first heat exchanger, and the second heat exchanger is connected with a heating mechanism; the heating mechanism comprises a heating pump and heating equipment, and the heating equipment is connected with the heating equipment after being connected with the second heat exchanger through the heating pump to form a heating heat exchange loop. The utility model has the advantages that: heating hot spring water by adopting a heat pump waste heat recovery mode, and providing warm air and domestic warm water; the heat dissipation problem of the water storage tank can be effectively solved.

Description

Heat pump heating system for comprehensive recovery of waste heat from hot spring wastewater

technical field

The utility model belongs to the field of energy technology, in particular to a heat pump heating system for comprehensive recovery of waste heat from hot spring wastewater.

Background technique

At present, domestic hot springs mostly use oil-fired boilers for heating, and some use gas-fired boilers or electric boilers. In winter, during the business hours of the hot springs, the boiler needs to run for a long time, which consumes a lot of energy. Oil-fired boilers and gas-fired boilers are greatly affected by fuel supply and price fluctuations; electric boilers use high-grade electric energy to produce hot water, which is very expensive.

In addition, hot spring baths consume a lot of heat, while hot spring wastewater is directly discharged. There is a large amount of waste heat in the waste water, which causes a waste of energy; it also causes thermal pollution to the environment.

Utility model content

In view of the deficiencies in the prior art above, the purpose of this utility model is to provide an effective comprehensive recovery and utilization of waste heat in hot spring wastewater, energy saving and consumption reduction of hot spring wastewater comprehensive recovery of waste heat heat pump heating system.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a heat pump heating system for comprehensive recovery of waste heat from hot spring wastewater, including a heat storage tank, a hot spring pool, a sewage tank, a heat pump, a domestic hot water tank, heating equipment and a heat exchanger etc., the hot water storage tank is connected to the hot spring water supply pipe; The tank is connected to form the first heat exchange circuit; the overflow pipe of the hot spring pool is connected to the first heat exchanger and then connected to the sewage tank; Connect; the inlet pipe of tap water is connected with the first heat exchanger and then connected with the domestic hot water tank.

The overflow pipe of the hot spring pool is provided with a branch overflow pipe connected to the second heat exchanger and then connected to the first heat exchanger, and the second heat exchanger is connected to the heating mechanism; the heating mechanism includes a heating pump and heating equipment, the heating equipment is connected to the heating equipment through the heating pump and the second heat exchanger to form a heating heat exchange circuit.

The heating mechanism further includes a third heat exchanger, the heating equipment is connected to the third heat exchanger through a heating pump, the third heat exchanger is connected to the second heat exchanger, and the second heat exchanger is connected to the heating equipment to form Heating heat exchange circuit.

A connecting branch pipeline with a valve is provided between the water inlet pipe of the heating equipment and the water outlet pipe of the second heat exchanger.

A branch bypass pipeline is connected between the heating heat exchange circuit and the first heat exchange circuit, and the heating heat exchange circuit is respectively provided with valves on both sides of the branch bypass pipeline.

The domestic hot water tank is connected to the third heat exchanger through a pipeline through a heat exchange pump to form a second heat exchange circuit.

The sewage tank includes a high-temperature sewage tank and a low-temperature sewage tank, the first heat exchanger is connected to the high-temperature sewage tank, and a connecting pipe is arranged between the high-temperature sewage tank and the low-temperature sewage tank; After the sewage pump is connected to the evaporator of the heat pump for heat exchange, it is connected to the low-temperature sewage tank, and a regulating valve is arranged on the pipeline between the sewage pump and the low-temperature sewage tank.

After adopting the above-mentioned structure, the utility model has the advantages compared with the prior art: the hot spring water is heated by a heat pump to recover waste heat, and the heat source for heating and domestic hot water are provided; the high-temperature sewage tank and the low-temperature sewage tank are used Set up separately, let the waste hot spring water overflowing from the hot spring pool flow directly to the high-temperature sewage tank, and the low-temperature sewage output from the evaporator of the heat pump flow to the low-temperature sewage tank, so that the sewage in the high and low temperature sewage tank is isolated from each other, so that the sewage entering the heat pump evaporator The sewage is high-temperature sewage, and a regulating valve is set between the low-temperature sewage tank and the sewage pump to adjust the water flow, so as to improve the working efficiency of the heat pump; at the same time, the hot spring water is heated to a higher temperature through the heat pump condenser. The hot spring water in the hot water storage tank can be directly fed into the heat pump for reheating to maintain the temperature in the water tank. The water level is balanced through the connecting pipe between the high-temperature sewage tank and the low-temperature sewage tank, and the excess sewage is discharged from the overflow pipe of the low-temperature sewage tank into the sewer, which is adjusted by setting a regulating valve on the pipeline between the low-temperature sewage tank and the evaporator of the heat pump The temperature of the water entering the evaporator can effectively solve the problem of excessive compressor load.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a schematic diagram of a heat pump heating system for comprehensive recovery of waste heat from hot spring wastewater of the present invention.

Detailed ways

The following descriptions are only preferred embodiments of the present utility model, and do not therefore limit the protection scope of the present utility model.

The heat pump heating system for comprehensive recovery of waste heat from hot spring wastewater, as shown in Figure 1, includes a hot water storage tank 1, a hot spring pool 3, a high-temperature sewage tank 4, a low-temperature sewage tank 5 and a heat pump 18. The hot water storage tank 1 is connected with the hot spring water replenishment pipe 2, and the hot spring water replenishment pipe 2 is connected with the water supply pipe of the hot spring water storage tank 1. The hot water storage tank 1 is connected with the hot spring pool 3 through pipelines to provide hot water for the hot spring pool 3 . The hot spring water coming in from the hot spring supply pipe 2 comes from underground hot water, and is mainly used to supplement the low-temperature hot spring water in the hot spring pool and provide a heat source for waste heat recovery. A first valve 13 is arranged on the pipeline between the hot water storage tank 1 and the hot spring pool 3 . The heat storage tank 1 is pressurized by the feedwater pump 19 through the pipeline, enters the condenser 12 in the heat pump 18 for heat exchange, and then is connected with the heat storage tank 1 to form a first heat exchange circuit. The overflow pipe of the hot spring pool 3 is connected to the first heat exchanger 23 and then connected to the high-temperature sewage tank 4; a connecting pipe 6 is arranged between the high-temperature sewage tank 4 and the low-temperature sewage tank 5 to connect; the high-temperature sewage tank 4 and the low-temperature sewage tank 5 are connected to the evaporator 10 of the heat pump through the pipeline through the sewage pump 9 to exchange heat and then connected to the low-temperature sewage tank 5, and a regulating valve 28 is arranged on the pipeline between the sewage pump 9 and the low-temperature sewage tank 5. The water inlet pipe 24 of tap water is connected with the first heat exchanger 23 and then connected with the domestic hot water tank 25 . A filter 8 is arranged on the pipeline between the high-temperature sewage tank 4, the low-temperature sewage tank 5 and the sewage pump 9 to filter impurities in the water and avoid its influence on the sewage pump and evaporator. An overflow drain pipe 7 is arranged on the low-temperature sewage tank 5 to discharge excess low-temperature waste water into the sewer. A drain pipe 15 equipped with a third valve is arranged on the low-temperature sewage tank 5 . A drain pipe 16 equipped with a second valve is arranged on the high-temperature sewage tank 4 . A drain pipe 14 with a fourth valve is arranged on the hot spring pool 3 . In the heat pump 18 , the condenser 12 and the evaporator 10 are connected through a compressor 11 , and a throttle valve 13 is also provided between the condenser 12 and the evaporator 10 .

The overflow pipe of the hot spring pool 3 is provided with a branch overflow pipe connected to the second heat exchanger 22 and then connected to the first heat exchanger 23, and the second heat exchanger 22 is connected to the heating mechanism. A second filter 31 and a valve are arranged between the overflow pipe and the first heat exchanger 23 and the second heat exchanger 22 . The heating mechanism includes a heating pump 20, a heating equipment 21 and a third heat exchanger 27, the heating equipment 21 is connected with the third heat exchanger 27 through the heating pump 20, and the third heat exchanger 27 is connected with the second heat exchanger 22 The second heat exchanger 22 is then connected with the heating equipment 21 to form a heating heat exchange circuit. The heating device 21 may be a heater. Between the water inlet pipe of the heating equipment 21 and the water outlet pipe of the second heat exchanger 22, a communication branch pipe 29 with a valve is arranged. A branch bypass pipeline 30 is arranged between the heating heat exchange circuit and the first heat exchange circuit to connect, and the heating heat exchange circuit is respectively provided with valves on both sides of the branch pipeline; in this way, the heating pump 20, the heating equipment 22 and the heat storage The water tank 1 forms a heat exchange circuit; the heating pump 20, the heating equipment 22 and the heat storage tank 1 form a heat exchange circuit; the heating pump 20, the heating equipment 22 and the condenser 12 form a heat exchange circuit; the heat storage tank 1 , the water supply pump 19 and the third heat exchanger 27 form a heat exchange circuit; the condenser 12, the water supply pump 19 and the third heat exchanger 27 form a heat exchange circuit. Multiple operating modes are provided by switching the valve switch. The domestic hot water tank 25 is connected to a third heat exchanger 27 through a heat exchange pump 26 to form a second heat exchange circuit.

When the utility model starts to operate, the hot water storage tank 1 and the hot spring pool 2 are filled with hot spring water. At this time, the high-temperature sewage tank 4 and the low-temperature sewage tank 5 have no water to enter, the water shortage switch is closed, the water full switch is disconnected, and the sewage pump , the feed water pump and the heat pump 18 stop working, when the temperature of the hot spring pool drops below the human body temperature, add hot spring water to increase the temperature, and the excess hot spring water flows into the high-temperature sewage tank after entering the heat exchanger through the filter; When the height is high, the water shortage switch is disconnected, the water full switch is closed, and the sewage pump 9, feed water pump 19 and heat pump 18 are automatically started. The sewage passes through the filter 8, and then pressurized by the sewage pump 9, enters the evaporator 10 of the heat pump for heat exchange, and then flows to the low-temperature sewage tank 5. When the overflowing waste hot spring water is greater than the flow rate of the sewage pump, the low-temperature sewage tank 5 The excess waste water is discharged into the sewer through the overflow pipe. When the overflowing waste hot spring water is less than the flow rate of the sewage pump, the redundant waste water in the low-temperature sewage tank flows to the high-temperature sewage tank 4 through the connecting pipe 6, so as to keep the water level balance of the high-low temperature sewage tank. When the temperature of the high-temperature sewage is too high, the sewage temperature is adjusted by adjusting the opening of the valve on the outlet pipe of the low-temperature sewage tank, the sewage pump 9 and the feed water pump 19 run continuously, and the heat in the sewage is absorbed by the evaporator of the heat pump and brought to the heat pump The middle condenser is released to provide heat source for hot spring and domestic hot water heating and room heating. When the temperature of the high and low temperature sewage tank is lower than the set temperature of the heat pump, the heat pump will be automatically turned off, and the temperature will rise to the set temperature of the heat pump. , the heat pump is automatically turned on to heat the hot spring water. When heating the domestic hot water, close the valves on the pipeline supplying the hot spring water storage tank and the heating heat exchanger, and the hot water from the heat pump condenser will exchange heat with the domestic hot water through the heat exchanger, and the domestic hot water will be heated The water pump is pressurized to exchange heat through the heat exchanger, and then flows back to the domestic hot water tank through the pipeline to complete the heating process, until it reaches the set temperature and automatically stops. The domestic hot water replenishment enters the heat exchanger through the tap water pipe through the valve, exchanges heat with the high-temperature sewage flowing from the hot spring pool, and then enters the domestic hot water tank. Domestic hot water, hot spring water heating and room heating can be performed separately or simultaneously. The function conversion can be completed only by adjusting the switch of the valve. The expansion tank plays the role of replenishing water and constant pressure to the water pipe. The pipeline between the hot spring pool and the high-temperature sewage is provided with a bypass heat exchanger and a valve to regulate the flow of high-temperature sewage passing through the heat exchanger. When the room is heated, the low-temperature heating hot water flowing from the end of the room passes through the heat exchanger, then is pressurized by the heating pump, and then returns to the end of the room through the bypass valve to heat the room. When the temperature of the heating hot water is low, the heating bypass is closed The valve allows the heating hot water and the hot water from the heat pump condenser to exchange heat through the heat exchanger and reheat to reach the required heating hot water temperature.

The above-described embodiments are not limitations of the present utility model, and those of ordinary skill in the relevant technical fields can make various changes and modifications without departing from the spirit and scope of the present utility model, so all equivalent technical solutions should also be Belonging to the scope of the utility model, the patent protection scope of the utility model should be defined by each claim.

Claims (7)

1. Heat pump heating system for comprehensive recovery of waste heat from hot spring wastewater, including heat storage tank, hot spring pool, sewage tank and heat pump. The heat storage tank is connected to the hot spring water supply pipe; The water tank is pressurized by the feedwater pump through the pipeline, connected to the condenser of the heat pump for heat exchange, and then connected to the heat storage tank to form the first heat exchange circuit; The sewage tank is connected to the sewage tank after being connected to the heat exchanger; the sewage tank is connected to the sewage tank through the pipeline through the sewage pump and the evaporator of the heat pump for heat exchange; the water inlet pipe of the tap water is connected to the first heat exchanger and then connected to the domestic hot water tank connect. 2. The heat pump heating system for comprehensive recovery of waste heat from hot spring wastewater according to claim 1, characterized in that: the overflow pipe of the hot spring pool is provided with a branch overflow pipe connected to the second heat exchanger and then connected to the first heat exchanger The heat exchanger is connected, and the second heat exchanger is connected with the heating mechanism; the heating mechanism includes a heating pump and heating equipment, and the heating equipment is connected with the heating equipment after the heating pump is connected with the second heat exchanger to form a heating heat exchange circuit . 3. The heat pump heating system for comprehensive recovery of waste heat from hot spring wastewater according to claim 2, characterized in that: the heating mechanism also includes a third heat exchanger, and the heating equipment is connected to the third heat exchanger through a heating pump. The third heat exchanger is connected with the second heat exchanger, and the second heat exchanger is connected with the heating equipment to form a heating heat exchange circuit. 4. The heat pump heating system for comprehensive recovery of waste heat from hot spring wastewater according to claim 2 or 3, characterized in that: there is a valve with a valve between the water inlet pipe of the heating equipment and the water outlet pipe of the second heat exchanger. connected branch pipelines. 5. The heat pump heating system for comprehensive recovery of waste heat from hot spring wastewater according to claim 4, characterized in that: a branch bypass pipeline connection is provided between the heating heat exchange circuit and the first heat exchange circuit, and the heating and heat exchange The circuit is respectively provided with valves on both sides of the branch bypass pipeline. 6. The heat pump heating system for comprehensive recovery of waste heat from hot spring wastewater according to claim 1, characterized in that: the domestic hot water tank is connected to the third heat exchanger through pipelines to form a second heat exchange circuit . 7. The heat pump heating system for comprehensive recovery of waste heat from hot spring wastewater according to claim 1, characterized in that: the sewage tank includes a high-temperature sewage tank and a low-temperature sewage tank, the first heat exchanger is connected to the high-temperature sewage tank, and the high-temperature sewage There is a connecting pipe between the sewage tank and the low-temperature sewage tank; the high-temperature sewage tank and the low-temperature sewage tank are respectively connected to the low-temperature sewage tank through the pipeline through the sewage pump and the evaporator of the heat pump, and then connected to the low-temperature sewage tank. A regulating valve is arranged on the pipeline between them.

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