CN207006632U - A kind of heat pump using sanitary sewage used heat - Google Patents

Abstract

The utility model discloses a heat pump system utilizing the waste heat of domestic sewage, which comprises a hot water collection tank, an outer wall heat exchange pipe attached to the outer wall of a septic tank, and a sewage side heat exchanger inside the septic tank, intervening with a branch at one end of the water inlet pipe It is connected to the sewage side heat exchanger and the inlet of the outer wall heat exchange pipe. One end of the intermediary water outlet pipe is branched to connect to the sewage side heat exchanger and the outlet of the outer wall heat exchange pipe. The other ends of the intermediary water outlet pipe and the intermediary water inlet pipe are respectively connected to the sewage The evaporator of the source heat pump unit, the hot water collection tank is connected to the domestic hot water appliance through the domestic hot water use pipe, the hot water collection tank is connected to the sewage source heat pump unit through the domestic water inlet pipe and the domestic water outlet pipe, and the domestic water is from the domestic The water enters the pipeline and enters the sewage source heat pump unit. After heat exchange in the condenser of the sewage source heat pump unit, it enters the hot water collection tank through the domestic water outlet pipe. The utility model solves the problems of blockage, corrosion and decontamination of the traditional sewage source heat pump.

Description

A heat pump system utilizing waste heat from domestic sewage

technical field

The utility model relates to the field of sewage source heat exchangers and heat pumps, in particular to a heat pump system utilizing waste heat from domestic sewage.

Background technique

Domestic sewage is a renewable thermal energy resource that contains abundant low-level thermal energy. It has been applied to a certain extent in China, Japan, and especially in some Nordic countries. Using the sewage source heat pump system can solve the building heating in winter, air conditioning in summer and hot water supply throughout the year.

The energy efficiency ratio of the sewage source heat pump unit can reach 4.3. Compared with the ground source heat pump, the total operating cost of the sewage source heat pump system is about 90% of the ground source heat pump system, which is about 50% of the gas hot water system; Compared with water and air source heat pumps, sewage source heat pumps can provide hot water all year round; compared with electric heat water heaters, sewage source heat pump systems use renewable energy and consume less electricity.

At present, sewage source heat pumps are divided into direct sewage heat pump systems and indirect sewage heat pump systems according to whether sewage directly enters the heat pump system. The sewage heat exchanger of the indirect sewage heat pump system can directly use ordinary materials or anti-corrosion coatings, and there is no need to clean the evaporator, but the heat exchanger needs to be cleaned to prevent corrosion and scaling of the sewage heat exchanger pipes. The evaporator of the direct system needs to consider anti-corrosion and use anti-corrosion materials, and the evaporator of the direct system needs to be cleaned frequently. In order to avoid leakage, the wall thickness of the evaporation tank should be appropriately increased.

Utility model content

The purpose of this utility model is to provide a heat pump system that utilizes the waste heat of domestic sewage, and utilizes the waste in the outer wall of the septic tank, the surrounding soil, and the internal sewage to achieve the purpose of providing domestic hot water all year round, which solves the problem of traditional sewage source heat pumps. Problems such as blockage, corrosion, and decontamination can be solved, and the problems of traditional ground source heat pump horizontal buried pipes occupying a large area and vertical buried pipes are relatively high.

The technical scheme of the utility model is as follows:

A heat pump system that utilizes waste heat from domestic sewage, including a hot water collection tank, an outer wall heat exchange pipe attached to the outer wall of a septic tank, and a sewage side heat exchanger inside the septic tank. The inlet of the heat exchanger and the heat exchange pipe on the outer wall, one end of the intermediary water outlet pipe is branched and connected to the sewage side heat exchanger and the outlet of the outer wall heat exchange pipe, and the other ends of the intermediary water outlet pipe and the intermediary water inlet pipe are respectively connected to the sewage source heat pump unit The evaporator and the hot water collection tank are connected to domestic hot water appliances through domestic hot water use pipes. The hot water collection tank is connected to the sewage source heat pump unit through domestic water inlet pipes and domestic water outlet pipes. Domestic water enters from the domestic water inlet pipes. The sewage source heat pump unit, after heat exchange in the condenser of the sewage source heat pump unit, enters the hot water collection tank through the domestic water outlet pipe. The domestic water outlet pipe is installed with a domestic hot water pump, and the intermediate outlet pipe is installed with a sewage side The circulation pump, the domestic water inlet pipe and the domestic water outlet pipe are respectively connected with the auxiliary heat source through branch pipes.

A temperature sensor is installed inside the hot water collecting tank.

The temperature sensor provides a signal for the start and stop of the heat pump unit.

The heat source of the sewage source heat pump unit comes from the domestic sewage inside the septic tank and the soil around the outer wall of the septic tank.

The sewage-side heat exchanger is made of snake-shaped heat-conducting pipes, and the outer wall heat-exchange pipes are made of snake-shaped heat-conducting pipes.

The sewage side heat exchanger has corrosion resistance.

The heat exchange pipes are respectively arranged inside the septic tank and on the outer wall of the septic tank.

The utility model extracts the heat in the outer wall of the septic tank and the surrounding soil and the heat in the internal sewage through the outer wall of the septic tank and the internal sewage side heat exchanger, and the heat transfer calculation principle is as follows: The intermediary water that has absorbed heat is driven by the sewage side circulation pump into the evaporator of the sewage source heat pump unit, and the sewage source heat pump unit raises this part of heat to heat the domestic water to reach the temperature of domestic hot water, and collect it to the heat source through the domestic hot water pump. The water collection tank is sent to the domestic hot water appliance through the domestic hot water use pipeline to provide water for users' daily life.

The advantages and effects of the utility model: (1) can solve the problem of domestic hot water all year round; (2) make full use of the heat in the septic tank to achieve the purpose of green energy saving; (3) can solve the blockage of traditional sewage source heat pumps, Corrosion, pollution and other technical problems; (4) Combined with the structure of the septic tank, the cost of excavation and buried pipelines is saved, and the floor space is reduced; The higher cost of buried pipes and other issues.

Description of drawings

Fig. 1 is the system schematic diagram of the utility model.

Fig. 2 is a schematic diagram of heat exchange of the sewage side heat exchanger located on the outer wall of the septic tank of the present invention.

Fig. 3 is a schematic diagram of heat exchange of the sewage side heat exchanger located inside the septic tank of the present invention.

detailed description

Referring to the accompanying drawings, a heat pump system utilizing waste heat from domestic sewage includes a hot water collection tank 7, an outer wall heat exchange pipe 14 attached to the outer wall of a septic tank 15, and a sewage side heat exchanger 1 inside the septic tank 15, intermediary One end branch of the water inlet pipe 2 is connected with the sewage side heat exchanger 1 and the inlet of the outer wall heat exchange pipe; The other end of the water inlet pipe 2 is respectively connected to the evaporator of the sewage source heat pump unit 4, the hot water collection tank 7 is connected to the domestic hot water appliance 9 through the domestic hot water use pipe 8, and the hot water collection tank 7 enters the pipe 5 through the domestic water , The domestic water outlet pipe 6 is connected to the sewage source heat pump unit 4, the domestic water enters the sewage source heat pump unit 4 from the domestic water inlet pipe 5, and enters through the domestic water outlet pipe 6 after heat exchange in the condenser of the sewage source heat pump unit 4 Hot water collection tank 7, domestic hot water pump 10 is installed in domestic water outlet pipe 6, sewage side circulating pump 11 is installed in intermediary water outlet pipe 3, domestic water inlet pipe 5, domestic water outlet pipe 6 respectively pass through branch pipe 12 and The auxiliary heat source is connected;

A temperature sensor 13 is installed in the hot water collection tank 7, and the temperature sensor 13 provides a signal for the start and stop of the heat pump unit 4. The heat source of the sewage source heat pump unit 4 comes from the domestic sewage inside the septic tank 15 and the soil around the outer wall of the septic tank. The heat exchanger 1 is made of a snake-shaped heat transfer pipe, the outer wall heat exchange pipe 14 is made of a snake-shaped heat transfer pipe, the sewage side heat exchanger 1 has corrosion resistance, and the heat exchange pipes 1 and 14 are arranged in the The interior of the septic tank and the outer wall of the septic tank.

Claims (7)

1. A heat pump system utilizing waste heat from domestic sewage, characterized in that it includes a hot water collection tank, an outer wall heat exchange pipe attached to the outer wall of the septic tank, and a sewage side heat exchanger inside the septic tank, intervening in the water inlet pipe One end branch is connected to the sewage side heat exchanger and the inlet of the outer wall heat exchange pipe, one end of the intermediary water outlet pipe is connected to the sewage side heat exchanger and the outlet of the outer wall heat exchange pipe, and the other end of the intermediary water outlet pipe and the intermediary water inlet pipe are respectively connected To the evaporator of the sewage source heat pump unit, the hot water collection tank is connected to the domestic hot water appliance through the domestic hot water use pipe, the hot water collection tank is connected to the sewage source heat pump unit through the domestic water inlet pipe and the domestic water outlet pipe, and the domestic water Enter the sewage source heat pump unit from the domestic water inlet pipe, and then enter the hot water collection tank through the domestic water outlet pipe after heat exchange by the condenser of the sewage source heat pump unit. The domestic water outlet pipe is installed with a domestic hot water pump, and the intermediary water A sewage side circulation pump is installed in the pipeline, and the domestic water inlet pipeline and the domestic water outlet pipeline are respectively connected to the auxiliary heat source through branch pipelines. 2. The heat pump system utilizing waste heat from domestic sewage according to claim 1, wherein a temperature sensor is installed inside the hot water collection tank. 3. The heat pump system utilizing waste heat from domestic sewage according to claim 2, wherein the temperature sensor provides a signal for starting and stopping the heat pump unit. 4. The heat pump system utilizing waste heat from domestic sewage according to claim 1, wherein the heat source of the sewage source heat pump unit comes from domestic sewage inside the septic tank and soil around the outer wall of the septic tank. 5. The heat pump system utilizing waste heat from domestic sewage according to claim 1, wherein the heat exchanger on the sewage side is made of a snake-shaped heat conduction pipe, and the outer wall heat exchange pipe is controlled by a snake-shaped heat conduction pipe become. 6 . The heat pump system utilizing waste heat from domestic sewage according to claim 1 , wherein the heat exchanger on the sewage side has corrosion resistance. 7 . 7 . The heat pump system utilizing waste heat from domestic sewage according to claim 1 , wherein the heat exchange pipes are respectively arranged inside the septic tank and on the outer wall of the septic tank.