CN201811496U - Heat storage multi-stage sewage waste heat recovery heat pump system - Google Patents

Abstract

The utility model discloses a heat storage type multistage sewage waste heat recovery heat pump device system, wherein a sewage collecting pipe is connected with a high-temperature water storage sedimentation tank, and a communicating pipe is arranged between the high-temperature water storage sedimentation tank and a low-temperature water storage sedimentation tank for connection; the high-temperature water storage sedimentation tank and the low-temperature water storage sedimentation tank are respectively connected with an evaporator in the heat pump device through a sewage pump through pipelines to exchange heat and then are connected with the low-temperature water storage sedimentation tank, and the evaporator, the auxiliary evaporator, the compressor and the condenser in the heat pump device are sequentially connected in series to form a circulation loop; the condenser is provided with a heat exchange loop connected with the water tank. The utility model has the advantages that: the sewage with waste heat is recycled, and a heating heat source and domestic hot water are provided; and a high-temperature water storage sedimentation tank and a low-temperature water storage sedimentation tank are respectively arranged, so that sewage in the high-temperature water storage sedimentation tank and sewage in the low-temperature water storage sedimentation tank are mutually isolated, and a regulating valve between the low-temperature water storage sedimentation tank and a sewage pump is used for regulating the water flow, so that the working efficiency of the heat pump device is improved, and the running stability of the equipment is ensured.

Description

Heat storage multi-stage sewage waste heat recovery heat pump system

technical field

The utility model belongs to the field of energy technology, in particular to a heat storage type multi-stage sewage waste heat recovery heat pump system.

Background technique

At present, most domestic hotels use oil-fired boilers for heating and heating domestic hot water, and some use gas-fired boilers or electric boilers. In winter, during the business hours of hot spring hotels, boilers need to run for a long time and consume 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 pools and public baths consume a lot of hot water, while shower wastewater is directly drained. In addition, in large-scale factories with high energy consumption such as power plants and chemical plants, most of the hot wastewater has a low recycling rate and 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 above-mentioned prior art, the purpose of this utility model is to provide a heat storage multi-stage sewage waste heat recovery heat pump system that can comprehensively recycle and utilize waste heat in hot spring wastewater, industrial and domestic wastewater, save energy and reduce consumption.

In order to achieve the above purpose, the technical solution adopted by the utility model is: heat storage multi-stage sewage waste heat recovery heat pump system, including high temperature water storage sedimentation tank, low temperature water storage sedimentation tank and heat pump device, sewage collection pipe and high temperature water storage sedimentation The high temperature water storage sedimentation tank and the low temperature water storage sedimentation tank are connected by connecting pipes; the high temperature water storage sedimentation tank and the low temperature water storage sedimentation tank are respectively connected to the evaporator in the heat pump device through the pipeline through the sewage pump after heat exchange Then connect with the low-temperature water storage sedimentation tank; the heat pump device includes an evaporator, an auxiliary evaporator, a compressor and a condenser, and the evaporator, an auxiliary evaporator, a compressor and a condenser are connected in series in sequence to form a circulation loop; the described The condenser is provided with a heat exchange circuit and connected with the water storage tank.

The condenser is provided with three groups, which are respectively the first condenser, the second condenser and the third condenser, and the first condenser, the second condenser and the third condenser are sequentially connected in series on the circulation loop , the first condenser is provided with a heat exchange circuit connected to the high-temperature water storage tank, the second condenser is provided with a heat exchange circuit connected to the medium-temperature water storage tank, and the third condenser is provided with a heat exchange circuit connected to the low-temperature water storage tank.

Between the high-temperature water storage tank and the medium-temperature water storage tank, between the high-temperature water storage tank and the low-temperature water storage tank, and between the medium-temperature water storage tank and the low-temperature water storage tank, communication pipelines are respectively arranged to connect.

The tap water inlet pipe is connected with the low-temperature water storage tank after being heat-exchanged by the first heat exchanger, so as to replenish warm water for the low-temperature water storage tank.

The low-temperature water storage tank is provided with a heat exchange circuit connected to the third heat exchanger, and provides heating for users through the third heat exchanger.

The pipeline between the high-temperature water storage sedimentation tank, the low-temperature water storage sedimentation tank and the evaporator is provided with an evaporator online cleaner, which automatically cleans the heat exchange surface in the evaporator online at regular intervals to prevent the heat exchange surface of the evaporator from being damaged. The heat transfer effect is affected by the precipitation of sewage scale.

The pipeline between the line cleaner and the evaporator is provided with a second branch heat exchange pipeline connected to the second heat exchanger through the sewage pump and the evaporator, and the user is provided with cold air through the second heat exchanger.

A backwashable filter and a grease trap are installed on the sewage collection pipe to filter impurities and floating objects in the sewage and avoid clogging.

After adopting the above structure, the utility model has the advantages compared with the prior art: recycle waste water with waste heat, provide heat source for heating, provide hot water for domestic use in summer and provide cold energy to the air conditioning system free of charge; and adopt high temperature The water storage sedimentation tank and the low temperature water storage sedimentation tank are set up separately. The low temperature sewage output from the evaporator of the heat pump device flows to the low temperature water storage sedimentation tank, so that the sewage in the high and low temperature water storage sedimentation tank is isolated from each other, so that the sewage entering the evaporator of the heat pump device The sewage is high-temperature sewage, and a regulating valve is set between the low-temperature water storage sedimentation tank and the sewage pump to adjust the water flow, thereby improving the working efficiency of the heat pump device; through the high-temperature water storage sedimentation tank and the low-temperature water storage sedimentation tank The connecting pipe is used to balance the water level, and the excess sewage is discharged from the overflow pipe of the low-temperature water storage sedimentation tank into the sewer, and the temperature of the water entering the evaporator is adjusted by setting a regulating valve on the pipeline between the low-temperature water storage sedimentation tank and the evaporator of the heat pump device , can effectively solve the problem of excessive compressor load and ensure the stability of equipment operation.

Description of drawings

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

Fig. 1 is a schematic diagram of the heat storage type multi-stage sewage waste heat recovery heat pump system 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 storage type multi-stage sewage waste heat recovery heat pump system, as shown in Figure 1, includes a high-temperature water storage sedimentation tank 6, a low-temperature water storage sedimentation tank 9 and a heat pump device 16. The sewage collection pipe 1 is connected to the high-temperature water storage sedimentation tank 6. A connecting pipe 8 is arranged between the water storage and sedimentation tank 6 and the low temperature water storage and sedimentation tank 9 to connect; 15 is connected to the low temperature water storage sedimentation tank 9 after heat exchange, and a regulating valve 11 is arranged on the pipeline between the low temperature water storage sedimentation tank 9 and the sewage pump 26 . A backwashable filter 2 and a grease trap 28 are arranged on the sewage collection pipe 1 to filter impurities and floating objects in the sewage and avoid clogging. A first branch pipeline 5 passing through the first heat exchanger 3 is arranged between the filter 2 and the high temperature water storage sedimentation tank 6 . The heat pump device 16 includes an evaporator 15, an auxiliary evaporator 17, a compressor 18 and a condenser. The evaporator 15, the auxiliary evaporator 17, the compressor 18 and the condenser are sequentially connected in series through a pump to form a circulation loop, and the circulation loop is provided with The expansion valve 27; the condenser is provided with a heat exchange circuit and connected with the water storage tank. The auxiliary evaporator 17 is a temperature-controlled evaporator, and the blower fan starts when the set temperature is reached, so as to dissipate cold energy into the air and assist the evaporator 15 to evaporate. The condenser can be provided with three groups, respectively the first condenser 19, the second condenser 20 and the third condenser 21, and the first condenser 19, the second condenser 20 and the third condenser 21 are sequentially connected in series in the described on the cycle loop. The first condenser 19 is provided with a heat exchange circuit connected to the high-temperature water storage tank 22 , the second condenser 20 is provided with a heat exchange circuit connected to the medium-temperature water storage tank 23 , and the third condenser 21 is provided with a heat exchange circuit connected to the low-temperature water storage tank 24 . Between the high-temperature water storage tank 22 and the medium-temperature water storage tank 23, between the high-temperature water storage tank 22 and the low-temperature water storage tank 24, and between the medium-temperature water storage tank 23 and the low-temperature water storage tank 24, communication pipelines are respectively arranged to connect. When the water temperature in the middle and low temperature water storage tank 23 is low, water pumps and valves can be opened to transfer the high temperature water in the high temperature water storage tank 22 to heat. The communication pipeline includes an adjustment communication pipeline provided with a valve and a water pump and a return water communication pipeline. The low-temperature water storage tank 24 is provided with a heat exchange circuit connected to the third heat exchanger 25, and the third heat exchanger 25 is used to provide heating for users.

The water inlet pipe 4 of tap water is connected with the low-temperature water storage tank 24 after exchanging heat by the first heat exchanger 3 , and replenishes the low-temperature water storage tank 24 with warm water. A drainpipe 10 equipped with a valve is arranged on the low-temperature water storage sedimentation tank 9 . A drainpipe 7 equipped with a valve is arranged on the high-temperature water storage sedimentation tank 6 . An overflow drain pipe 12 is provided on the low-temperature water storage and sedimentation tank 9 to discharge excess low-temperature waste water into the sewer. An online cleaner 14 is installed on the pipeline between the high-temperature water storage and sedimentation tank 6, the low-temperature water storage and sedimentation tank 9, and the evaporator 15 to automatically clean the heat exchange surface in the evaporator on-line at regular intervals, so as to avoid the heat exchange of the evaporator 15 The heat exchange effect is affected by the precipitation of sewage scale on the surface.

The pipeline between the online cleaner 14 and the evaporator 15 is provided with a second branch heat exchange pipeline connected to the second heat exchanger 13 through the sewage pump and the evaporator, and the second heat exchanger 13 provides cold air for users.

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 (10)

1. Heat storage type multi-stage sewage waste heat recovery heat pump system, including high-temperature water storage sedimentation tank, low-temperature water storage sedimentation tank and heat pump device, characterized in that: the sewage collection pipe is connected to the high-temperature water storage sedimentation tank, and the high-temperature water storage sedimentation tank is connected to the The low-temperature water storage and sedimentation tanks are connected by connecting pipes; the high-temperature water storage and sedimentation tanks and the low-temperature water storage and sedimentation tanks are respectively connected to the low-temperature water storage and sedimentation tanks through pipelines through the sewage pump and the evaporator in the heat pump device to exchange heat; The heat pump device includes an evaporator, an auxiliary evaporator, a compressor and a condenser, and the evaporator, the auxiliary evaporator, the compressor and the condenser are sequentially connected in series to form a circulation loop; the condenser is provided with a heat exchange circuit and a storage tank. Water tank connection. 2. The heat storage type multi-stage sewage waste heat recovery heat pump system according to claim 1, characterized in that: said condensers are provided with three groups, namely the first condenser, the second condenser and the third condenser, The first condenser, the second condenser and the third condenser are sequentially connected in series on the circulation circuit, the first condenser is provided with a heat exchange circuit connected to the high-temperature water storage tank, and the second condenser is provided with a heat exchange circuit connected with the high-temperature water storage tank. The medium temperature water storage tank is connected, and the third condenser is provided with a heat exchange circuit to connect with the low temperature water storage tank. 3. The heat storage type multi-stage sewage waste heat recovery heat pump system according to claim 2, characterized in that: between the high-temperature water storage tank and the medium-temperature water storage tank, between the high-temperature water storage tank and the low-temperature water storage tank, between the medium-temperature water storage tank Communication pipelines are respectively arranged to connect with the low-temperature water storage tank. 4. The heat storage type multi-stage sewage waste heat recovery heat pump system according to claim 1, characterized in that: the low temperature water storage tank is provided with a heat exchange circuit connected to the third heat exchanger. 5. The heat storage type multi-stage sewage waste heat recovery heat pump system according to claim 1, characterized in that: the pipeline between the high-temperature water storage sedimentation tank, the low-temperature water storage sedimentation tank and the evaporator is provided with online cleaning device. 6. The heat storage type multi-stage sewage waste heat recovery heat pump system according to claim 5, characterized in that: the pipeline between the line cleaner and the evaporator is provided with a second branch heat exchange pipeline passing through the sewage pump And the evaporator is connected with the second heat exchanger. 7. The heat storage type multi-stage sewage waste heat recovery heat pump system according to claim 1, characterized in that: a backwashable filter is provided on the sewage collection pipe. 8. The heat storage type multi-stage sewage waste heat recovery heat pump system according to claim 1, characterized in that a first branch pipeline passing through a first heat exchanger is provided between the filter and the high temperature water storage and sedimentation tank. 9. The heat storage type multi-stage sewage waste heat recovery heat pump system according to claim 8, characterized in that: the tap water inlet pipe is connected to the low-temperature water storage tank after heat exchange by the first heat exchanger. 10. The heat storage type multi-stage sewage waste heat recovery heat pump system according to claim 1, characterized in that: a grease trap is arranged on the sewage collection pipe.

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