Three-stage heating disposable hot water supply device recycling bathing waste heat in centralized box type

Abstract

The utility model relates to wastewater heating equipment technical field especially relates to a centralized box type recycling bathing waste heat's three -level heating disposable heating water equipment, including setting up the filter mechanism for purification in the right side of tap water import, and filter mechanism right side sets up a class sewage heat exchanger, the source heat pump group is set up right side of sewage heat exchanger, and source heat pump group right side is provided with electric auxiliary heating equipment, electric auxiliary heating equipment right side is connected with tap water export, and tap water export end passes through pipeline and connects with finished product heat preservation water tank and is connected through. The utility model adopts three -level heating form, tap water enters equipment and directly heats, and it is hot water that satisfies the requirement of using of taking a bath after going out equipment, and tap water heating time is short, and it is disposable water, and centralized box type bathing hot water heating equipment can be prefabricated directly in factory, and after manufacturing is completed, transports to project site and directly connects and uses, greatly shortens construction period, and improves construction efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater heating equipment, and in particular to a centralized box-type three-stage heating and one-time hot water supply equipment for recovering waste heat from bathing. Background Technology

[0002] Currently, the utilization rate of waste heat from bathhouse wastewater is very low, with most bathhouse wastewater being directly discharged into sewers, resulting in a significant waste of energy. Domestically, the waste heat recovery equipment for bathhouse wastewater is primarily a wastewater heat exchanger combined with a wastewater source heat pump to recover waste heat and prepare hot water for bathing. This equipment is generally located in a machine room, making it relatively dispersed and requiring a large area.

[0003] Currently, domestic waste heat recovery equipment for bathing wastewater consists of plate heat exchangers combined with ordinary heat pump units featuring anti-corrosion coatings. These systems generally suffer from difficulties in cleaning scale buildup. Furthermore, the commonly used plate heat exchangers and wastewater source heat pumps for bath water production do not produce hot water in a single cycle; instead, the hot water is circulated multiple times, heated to a set temperature, and then stored. This technology currently suffers from problems such as large footprint, difficulty in descaling, and long hot water production times. Therefore, a centralized, box-type, three-stage heating system for primary hot water supply that recovers bathing waste heat is needed to solve these problems. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A centralized box-type three-stage heating disposable hot water supply equipment for recovering waste heat from bathing includes a filter mechanism for purification located to the right of the tap water inlet, a primary wastewater heat exchanger located to the right of the filter mechanism, a source heat pump unit located to the right of the primary wastewater heat exchanger, and an electric auxiliary heating device located to the right of the source heat pump unit. The electric auxiliary heating device is connected to a tap water outlet on the right, and the end of the tap water outlet is connected to a finished insulated water tank via a pipeline. The filter mechanism, primary wastewater heat exchanger, source heat pump unit, and electric auxiliary heating device are all located inside the centralized box. All equipment is pre-installed in the centralized box, reducing on-site installation interfaces by 90% and shortening the construction period to within three days. The structure between the secondary wastewater source heat pump and the electric auxiliary heating device is a flange with a temperature sensor, which can monitor the water temperature in real time and facilitate power-off protection after overheating.

[0007] A sewage filter is installed on the left side of the primary sewage heat exchanger, and a sewage inlet is connected to the left side of the sewage filter. An interception mechanism is installed on the left side of the sewage inlet, and the interception mechanism is connected to a submersible sewage pump through a pipe. The submersible sewage pump is installed inside the sewage collection tank.

[0008] Preferably, the filtration mechanism consists of a tap water filter, a descaling device, and a pipeline pump. The tap water filter is flanged to the tap water inlet on its left side, and the descaling device is flanged to the right side of the tap water filter. The descaling device is fixedly connected to the inlet end of the pipeline pump on its right side. The tap water pipeline is directly flanged to the tap water inlet. The tap water filter and the descaling device work together to remove impurities and reduce scale, thereby reducing the residue of dirt in the primary wastewater heat exchanger.

[0009] Preferably, the primary wastewater heat exchanger is provided with inlet A, inlet C and outlet B, outlet D. Inlet A of the primary wastewater heat exchanger is fixedly connected to the outlet end of the pipeline pump. Tap water enters the primary wastewater heat exchanger through the pipeline pump and flows through inlet A and outlet B to exchange heat with the flowing wastewater in inlet C and outlet D for the first time.

[0010] Preferably, the heat pump unit consists of a secondary wastewater source heat pump and a tertiary wastewater source heat pump. Both the secondary and tertiary wastewater source heat pumps are equipped with inlets A and C, and outlets B and D. The inlet A of the tertiary wastewater source heat pump is connected to the outlet B of the primary wastewater heat exchanger via a pipe. The two condenser ends of the secondary and tertiary wastewater source heat pumps work together to heat the tap water. The two evaporator ends of the secondary and tertiary wastewater source heat pumps work together to quickly cool the wastewater.

[0011] Preferably, the outlet B of the tertiary wastewater source heat pump is connected to the inlet A of the secondary wastewater source heat pump via a pipeline. The outlet B of the secondary wastewater source heat pump is connected to the inlet of the electric auxiliary heating equipment. The water flow is heated a second time by the condenser of the tertiary wastewater source heat pump and then circulated into the secondary wastewater source heat pump. It is then heated a third time by the condenser of the secondary wastewater source heat pump, which can cooperate with the primary wastewater heat exchanger to quickly raise the temperature.

[0012] Preferably, the interception mechanism consists of a hair filter and a sand tank. The outlet end of the submersible pump is fixedly connected to the hair filter, and the left side of the hair filter is connected and connected to the sand tank. The outlet end of the sand tank is connected and connected to the sewage inlet. The hair filter intercepts hair and other filamentous debris in the bath wastewater, preventing hair and other filamentous debris from entering the primary sewage heat exchanger.

[0013] Preferably, the inlet C of the primary wastewater heat exchanger is fixedly connected to the outlet of the wastewater filter, and the outlet D of the primary wastewater heat exchanger is connected to the inlet C of the secondary wastewater source heat pump for bathing wastewater through a pipe. The outlet D of the secondary wastewater source heat pump for bathing wastewater is connected to the inlet C of the tertiary wastewater source heat pump for bathing wastewater through a pipe. The outlet D of the tertiary wastewater source heat pump for bathing wastewater is connected to the wastewater outlet. The wastewater filter can perform secondary filtration of the bathing wastewater, reducing the probability of debris entering the primary wastewater heat exchanger and causing blockage, thus ensuring the normal operation of the equipment.

[0014] Preferably, the primary wastewater heat exchanger, the secondary wastewater source heat pump for bathing wastewater, and the tertiary wastewater source heat pump for bathing wastewater are all configured with hinged door structures. The primary wastewater heat exchanger, the secondary wastewater source heat pump for bathing wastewater, and the tertiary wastewater source heat pump for bathing wastewater use quick-opening hinged doors, which support in-situ cleaning without disassembling the pipes. With the help of hydraulic struts, a single person can complete the opening and closing operation.

[0015] A three-stage heating system for centralized box-type waste heat recovery in bathing, comprising the following steps:

[0016] The first step is that tap water enters through the tap water inlet, passes through the tap water filter to remove impurities and the descaling device to prevent scale buildup, and is then pressurized and transported through the pipeline pump.

[0017] The second step involves preheating the tap water in a primary wastewater heat exchanger, raising the water temperature from 15°C to 25°C.

[0018] The third step involves heating the water in a three-stage wastewater source heat pump for bathing, raising the water temperature from 25°C to 35°C.

[0019] The fourth step involves the tap water being heated by a three-stage wastewater source heat pump for bathing wastewater, and then entering a two-stage wastewater source heat pump for bathing wastewater for further heating, raising the water temperature from 35℃ to 45℃.

[0020] Fifth, after the hot water passes through the outlet of the secondary bath wastewater-specific sewage source heat pump, it is heated by an electric auxiliary heating device to meet the higher water temperature requirements, so that the hot water can be directly stored in the finished insulated water tank through the tap water outlet.

[0021] A centralized, box-type, three-stage heating, disposable hot water supply system for treating bathing wastewater comprises the following steps:

[0022] The first step is to collect the bathing wastewater into the sewage collection tank. After being pumped out by the submersible sewage pump, the wastewater passes through the hair filter and sand filter to intercept impurities before entering the sewage inlet of the equipment.

[0023] The second step involves secondary filtration through a wastewater filter. The bathing wastewater flows into the primary wastewater heat exchanger to release heat. The bathing wastewater that has initially released heat enters the evaporator of the secondary wastewater source heat pump for secondary heat release. Finally, it enters the evaporator of the tertiary wastewater source heat pump for tertiary heat release. After the temperature drops to ≤5℃, it is discharged through the wastewater outlet.

[0024] This utility model has at least the following beneficial effects:

[0025] 1. This technology adopts a centralized box structure, which can integrate the primary sewage heat exchanger, the secondary sewage source heat pump for bathing wastewater, the tertiary sewage source heat pump for bathing wastewater, filtration equipment, and power distribution and automatic control equipment into a centralized box. The integrated equipment occupies a small area and does not require the construction of a new machine room.

[0026] 2. The equipment in this technology adopts a three-stage heating method. Tap water is directly heated when it enters the equipment, and the water exiting the equipment is hot water that meets the requirements for bathing. The tap water heating time is short and the water is produced in one go. The centralized box-type bathing hot water heating equipment can be prefabricated in the factory. After the manufacturing is completed, it is transported to the project site and directly connected for use, which greatly shortens the construction period and improves construction efficiency.

[0027] 3. All equipment in this technology uses specialized equipment for bathing wastewater. The wastewater heat exchanger and wastewater source heat pump both adopt a hinged structure, which makes it easy to clean dirt and does not affect the operation of the equipment. The application of this technology solves the problems of large footprint, difficult descaling, and long hot water production time that exist in the current domestic bathing wastewater waste heat recovery system. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This utility model presents a system flow diagram of a centralized box-type three-stage heating disposable hot water supply device for recovering waste heat from bathing.

[0030] In the diagram: 1. Sewage collection tank; 2. Submersible pump; 3. Hair filter; 4. Sand filter; 5. Sewage inlet; 6. Tap water inlet; 7. Tap water filter; 8. Descaling device; 9. Sewage filter; 10. Pipeline pump; 11. Primary sewage heat exchanger; 12. Secondary sewage source heat pump for bathing wastewater; 13. Tertiary sewage source heat pump for bathing wastewater; 14. Electric auxiliary heating equipment; 15. Centralized tank; 16. Tap water outlet; 17. Sewage outlet; 18. Finished insulated water tank. Detailed Implementation

[0031] The present invention will be described in detail below with reference to specific embodiments.

[0032] Reference Figure 1 A centralized box-type three-stage heating disposable hot water supply equipment for recovering waste heat from bathing includes a filter mechanism installed on one side of the tap water inlet 6 for purification, and a primary sewage heat exchanger 11, a source heat pump group, an electric auxiliary heating device 14, and a tap water outlet 16 connected in sequence. The end of the tap water outlet 16 is connected to the finished insulated water tank 18 through a pipeline. The filter mechanism, the primary sewage heat exchanger 11, the source heat pump group, and the electric auxiliary heating device 14 are all installed inside the centralized box 15.

[0033] A wastewater filter 9, a wastewater inlet 5, and an interception mechanism are sequentially connected to one side of the primary wastewater heat exchanger 11. The interception mechanism is connected to the submersible pump 2 via a pipe. The submersible pump 2 is installed inside the wastewater collection tank 1.

[0034] The filtration mechanism consists of a tap water filter 7, a descaling device 8, and a pipeline pump 10. The tap water filter 7 is flanged to the tap water inlet 6 on the left side, and the descaling device 8 is flanged to the right side of the tap water filter 7. The right side of the descaling device 8 is fixedly connected to the inlet end of the pipeline pump 10.

[0035] The primary wastewater heat exchanger 11 is equipped with inlet A, inlet C and outlet B, outlet D. Inlet A of the primary wastewater heat exchanger 11 is connected and fixed to the outlet end of the pipeline pump 10.

[0036] The heat pump unit consists of a secondary wastewater source heat pump 12 and a tertiary wastewater source heat pump 13. Both the secondary wastewater source heat pump 12 and the tertiary wastewater source heat pump 13 are equipped with inlet A, inlet C and outlet B, outlet D. The inlet A of the tertiary wastewater source heat pump 13 is connected to the outlet B of the primary wastewater heat exchanger 11 through a pipeline.

[0037] The outlet B of the tertiary wastewater source heat pump 13 is connected to the inlet A of the secondary wastewater source heat pump 12 via a pipeline. The outlet B of the secondary wastewater source heat pump 12 is connected to the inlet of the electric auxiliary heating equipment 14.

[0038] The interception mechanism consists of a hair filter 3 and a sand tank 4. The outlet end of the submersible pump 2 is connected and fixed to the hair filter 3, and the left side of the hair filter 3 is connected and connected to the sand tank 4. The outlet end of the sand tank 4 is connected and connected to the sewage inlet 5.

[0039] The inlet C of the primary wastewater heat exchanger 11 is fixedly connected to the outlet of the wastewater filter 9. The outlet D of the primary wastewater heat exchanger 11 is connected to the inlet C of the secondary bath wastewater source heat pump 12 through a pipe. The outlet D of the secondary bath wastewater source heat pump 12 is connected to the inlet C of the tertiary bath wastewater source heat pump 13 through a pipe. The outlet D of the tertiary bath wastewater source heat pump 13 is connected to the wastewater outlet 17.

[0040] The primary sewage heat exchanger 11, the secondary sewage source heat pump 12 for bathing wastewater and the tertiary sewage source heat pump 13 for bathing wastewater are all equipped with a hinged door structure.

[0041] All equipment is pre-installed in the central box 15, reducing on-site installation interfaces by 90% and shortening the construction period to within three days. The structure between the secondary bath wastewater special sewage source heat pump 12 and the electric auxiliary heating equipment 14 is a flange with a temperature sensor, which can monitor the water temperature in real time and facilitate power-off protection after overheating.

[0042] Two or more submersible sewage pumps 2 are installed. The design of several submersible sewage pumps 2 improves the suction effect of bathing wastewater, so that the bathing wastewater can be quickly discharged from the sewage collection tank 1. In the flow, it exchanges heat with tap water to achieve the effect of waste heat utilization, reduce equipment costs, and improve the heating efficiency of tap water. The tap water pipe is directly connected to the tap water inlet 6 through a flange. The tap water filter 7 and the descaling device 8 work together to remove impurities and reduce scale, reduce the residue of dirt in the primary sewage heat exchanger 11, and thus ensure the smooth flow of water.

[0043] Tap water enters the primary wastewater heat exchanger 11 via pipeline pump 10. It flows through inlet A and outlet B and then through inlet C and outlet D to exchange heat with the flowing wastewater, preheating the tap water from 15°C to 25°C. This achieves a dual effect of preheating the tap water and cooling the bath wastewater. The two condenser ends of the secondary and tertiary wastewater heat pumps 12 and 13 work together to heat the tap water. The two evaporator ends of the secondary and tertiary wastewater heat pumps 12 and 13 work together to quickly exchange heat and cool the bath wastewater, facilitating its discharge when it reaches a constant temperature.

[0044] The water flow is reheated twice by the condenser of the three-stage wastewater source heat pump 13, and then circulated into the two-stage wastewater source heat pump 12. It is then reheated a third time by the condenser of the two-stage wastewater source heat pump 12, which can work in conjunction with the one-stage wastewater heat exchanger 11 to quickly raise the temperature of the water to a constant temperature of about 45°C. If the water temperature is not up to standard or does not meet the requirements, an external electric auxiliary heating device 14 is connected to the outlet B of the two-stage wastewater source heat pump 12 through a pipeline to further heat the water. This electric auxiliary heating device 14 can be used in conjunction with a water temperature sensor. Hair and other fibrous debris in the wastewater are intercepted by the hair filter 3 to prevent them from entering the one-stage wastewater heat exchanger 11. A sand filter 4 is installed after the hair filter 3. The filter medium in the sand filter 4 can filter debris in the wastewater, improving the cleaning effect of the wastewater.

[0045] The wastewater filter 9 provides secondary filtration of the bathing wastewater, reducing the chance of debris entering the primary wastewater heat exchanger 11 and causing blockages, thus ensuring the normal operation of the equipment. The outlet D of the secondary wastewater heat pump 12 is connected to the inlet C of the tertiary wastewater heat pump 13, allowing the bathing wastewater to achieve a two-stage cooling effect as it passes through the evaporators of the two pumps, improving the cooling rate. The cooled bathing wastewater can be discharged into the sewage ditch for centralized treatment via the wastewater outlet 17. The primary wastewater heat exchanger 11, the secondary wastewater heat pump 12, and the tertiary wastewater heat pump 13 all use quick-opening hinged doors, supporting in-situ cleaning without disassembling the pipes. With the help of hydraulic struts, a single person can complete the opening and closing operation, shortening the cleaning cycle. The primary wastewater heat exchanger 11 adopts a wide-channel corrugated plate design to reduce the risk of flow velocity blockage.

[0046] The specific working principle is as follows: As a disposable hot water generator, the tap water pipe is directly connected to the tap water inlet 6 of the equipment via a flange. After simple filtration and descaling treatment by the tap water filter 7 and descaling device 8, the water enters the first-stage sewage heat exchanger 11 through the pipeline pump 10 to exchange heat with the sewage for the first time. The tap water is preheated from 15℃ to 25℃ and then enters the condenser of the third-stage bath wastewater special sewage source heat pump 13 for the second heating. The water temperature is further increased to 35℃ and then enters the condenser of the second-stage bath wastewater special sewage source heat pump 12 for the third heating. Finally, the hot water reaches the set temperature of 45℃ and is directly stored in the finished product insulated water tank 18 through the tap water outlet 16 for bathing use.

[0047] Secondly, the heat source of this equipment utilizes bathing wastewater. All bathing wastewater is collected in the sewage collection tank 1. After being filtered by the submersible pump 2, hair filter 3, and sand filter 4, it is transported to the sewage inlet 5 of the equipment and enters the sewage filter 9 for sewage filtration treatment. The treated sewage then enters the primary sewage heat exchanger 11 to exchange heat with tap water for the first time. The bathing wastewater releases heat from 31°C to 21°C and then enters the evaporator of the secondary bathing wastewater-specific sewage source heat pump 12 for the second heat release. The temperature drops from 21°C to 13°C. Finally, it enters the evaporator of the tertiary bathing wastewater-specific sewage source heat pump 13 for the third heat release. The temperature drops to below 5°C and is discharged into the sewer pipe through the equipment sewage outlet 17.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A centralized box-type three-stage heating and disposable hot water supply device for recovering waste heat from bathing, characterized in that, It includes a filtration mechanism set on the right side of the tap water inlet (6) for purification, and a primary sewage heat exchanger (11), a source heat pump group, an electric auxiliary heating device (14), and a tap water outlet (16) connected in sequence. The end of the tap water outlet (16) is connected to the finished product insulated water tank (18) through a pipeline. The filtration mechanism, the primary sewage heat exchanger (11), the source heat pump group and the electric auxiliary heating device (14) are all set inside the central box (15). A sewage filter (9), a sewage inlet (5), and an interception mechanism are sequentially connected to one side of the primary sewage heat exchanger (11). The interception mechanism is connected to a submersible sewage pump (2) through a pipe. The submersible sewage pump (2) is installed inside the sewage collection tank (1).

2. The centralized box-type three-stage heating and one-time hot water supply equipment for recovering waste heat from bathing, as described in claim 1, is characterized in that... The filtration mechanism consists of a tap water filter (7), a descaling device (8), and a pipeline pump (10). The tap water filter (7) is flanged to the tap water inlet (6) on the left side, and the descaling device (8) is flanged to the right side of the tap water filter (7). The descaling device (8) is fixed to the inlet end of the pipeline pump (10) on the right side.

3. The centralized box-type three-stage heating and one-time hot water supply equipment for recovering waste heat from bathing, as described in claim 1, is characterized in that... The primary sewage heat exchanger (11) is provided with inlet A, inlet C and outlet B, outlet D. The inlet A of the primary sewage heat exchanger (11) is connected and fixed to the outlet end of the pipeline pump (10).

4. A centralized box-type three-stage heating and one-time hot water supply equipment for recovering waste heat from bathing, as described in claim 1, is characterized in that... The heat pump group consists of a secondary wastewater source heat pump (12) and a tertiary wastewater source heat pump (13). Both the secondary wastewater source heat pump (12) and the tertiary wastewater source heat pump (13) are equipped with inlet A, inlet C and outlet B, outlet D. The inlet A of the tertiary wastewater source heat pump (13) is connected to the outlet B of the primary wastewater heat exchanger (11) through a pipeline.

5. A centralized box-type three-stage heating and one-time hot water supply equipment for recovering waste heat from bathing, as described in claim 4, is characterized in that... The outlet B of the third-level bath wastewater special sewage source heat pump (13) is connected to the inlet A of the second-level bath wastewater special sewage source heat pump (12) through a pipeline, and the outlet B of the second-level bath wastewater special sewage source heat pump (12) is connected to the inlet end of the electric auxiliary heating equipment (14).

6. A centralized box-type three-stage heating and one-time hot water supply equipment for recovering waste heat from bathing, as described in claim 1, is characterized in that... The interception mechanism consists of a hair filter (3) and a sand cylinder (4). The outlet end of the submersible pump (2) is fixedly connected to the hair filter (3), and the left side of the hair filter (3) is connected to the sand cylinder (4). The outlet end of the sand cylinder (4) is connected to the sewage inlet (5).

7. A centralized box-type three-stage heating and one-time hot water supply equipment for recovering waste heat from bathing, as described in claim 5, is characterized in that... The inlet C of the primary wastewater heat exchanger (11) is fixedly connected to the outlet of the wastewater filter (9). The outlet D of the primary wastewater heat exchanger (11) is connected to the inlet C of the secondary bath wastewater source heat pump (12) through a pipe. The outlet D of the secondary bath wastewater source heat pump (12) is connected to the inlet C of the tertiary bath wastewater source heat pump (13) through a pipe. The outlet D of the tertiary bath wastewater source heat pump (13) is connected to the wastewater outlet (17).

8. A centralized box-type three-stage heating and one-time hot water supply equipment for recovering waste heat from bathing, as described in claim 7, is characterized in that... The primary sewage heat exchanger (11), the secondary sewage source heat pump (12) for bathing wastewater and the tertiary sewage source heat pump (13) for bathing wastewater are all configured with hinged door structures.

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