Waste cold and waste heat double-effect utilization system

Abstract

The utility model discloses a waste cold and waste heat double-effect utilization system which comprises a hot water tank, a cold water tank, a water source heat pump and an energy recovery device used for recovering waste cold and waste heat in production equipment. The energy recovery device communicates with the cold water tank through a waste cold recovery pipeline and communicates with the hot water tank through a waste heat recovery pipeline. The water source heat pump communicates with the cold water tank through a cold supplementing circulation pipeline and communicates with the hot water tank through a heat supplementing circulation pipeline. The cold water tank communicates with production equipment through a cold energy pipeline and is used for providing cold energy. The hot water tank communicates with production equipment through a heat energy pipeline to provide heat energy. According to the waste cold and waste heat recycling device, waste cold and waste heat in production equipment are recycled, energy waste is avoided, and the energy utilization efficiency is remarkably improved; meanwhile, the water source heat pump is used for supplementing energy to the recycled waste cold and waste heat, the recycled waste cold and waste heat is improved into high-grade energy, and compared with other heat supply and refrigeration technologies, the system is low in operation energy consumption, and remarkable economic benefits can be brought to enterprises.

Description

Technical Field

[0001] This utility model belongs to the field of thermal energy engineering, specifically relating to a waste cooling and waste heat dual-effect utilization system. Background Technology

[0002] Currently, my country's energy utilization still faces major problems such as low efficiency, poor economic benefits, and significant environmental pressure. Energy conservation, emission reduction, and improving the overall energy utilization rate are important components of energy development planning and are fundamental ways to solve my country's energy problems, thus occupying a priority position. Achieving the goals of energy conservation, emission reduction, and improved energy utilization efficiency mainly relies on the industrial sector.

[0003] Specifically, many industries have both heat and cooling needs in their production processes. For example, the brewing processes of condiments such as soy sauce, bean paste, and fermented black beans not only require steam to heat the materials but also necessitate cooling measures before and during koji making to maintain a suitable temperature for the materials. However, much of the energy used in this industry is for single-use purposes. The waste heat generated after steam heating is mostly discarded, while the cooling required for optimal (cold) fermentation often relies on a single-use refrigeration system. Therefore, effectively utilizing waste heat and cooling is currently a crucial way for enterprises to achieve energy conservation, emission reduction, and improved energy efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model aims to provide a dual-effect system for utilizing waste cooling and waste heat, thereby improving energy efficiency, reducing production costs, and ultimately enhancing economic benefits.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a dual-effect utilization system for waste cooling and waste heat, including a hot water tank, a cold water tank, a water source heat pump, and an energy recovery device for recovering waste cooling and waste heat in production equipment;

[0006] The energy recovery device is connected to the cold water tank through a waste cooling recovery pipeline and to the hot water tank through a waste heat recovery pipeline; the water source heat pump is connected to the cold water tank through a supplementary cooling circulation pipeline and to the hot water tank through a supplementary heating circulation pipeline; the cold water tank is connected to the production equipment through a cold energy pipeline to provide cold energy; and the hot water tank is connected to the production equipment through a heat energy pipeline to provide heat energy.

[0007] As a limitation of this utility model, the outlet of the waste cooling recovery pipeline is connected to the upper part of the cold water tank, and the waste heat recovery pipeline includes a first branch pipeline whose outlet is connected to the upper part of the hot water tank and a second branch pipeline whose outlet is connected to the lower part of the hot water tank.

[0008] The inlet of the make-up cooling circulation pipe is connected to the upper part of the cold water tank, and the outlet of the make-up cooling circulation pipe is connected to the lower part of the cold water tank.

[0009] The inlet of the heat replenishment circulation pipeline is connected to the lower part of the hot water tank, and the outlet of the heat replenishment circulation pipeline is connected to the upper part of the hot water tank.

[0010] The cold energy pipeline has its inlet connected to the lower part of the cold water tank, while the hot energy pipeline includes a third branch pipeline with its inlet connected to the upper part of the hot water tank and a fourth branch pipeline with its inlet connected to the lower part of the hot water tank.

[0011] As another limitation of this utility model, the energy recovery device includes a heat exchanger for transferring waste cold from the production equipment to the medium in the waste cold recovery pipeline or for transferring waste heat to the medium in the waste heat recovery pipeline.

[0012] As a further limitation of this utility model, it also includes an air source heat pump connected in parallel with the water source heat pump. The air source heat pump is connected to a cold water tank through a cooling circulation pipeline and to a hot water tank through a heating circulation pipeline.

[0013] As a third limitation of this utility model, it also includes a water replenishment device that is connected to the cold water tank and the hot water tank respectively through a water replenishment pipeline.

[0014] As a further limitation of this utility model, the water supply pipeline includes a fifth branch pipeline with its outlet connected to the upper part of the hot water tank, a sixth branch pipeline with its outlet connected to the upper part of the cold water tank, a seventh branch pipeline with its outlet connected to the lower part of the hot water tank, and an eighth branch pipeline with its outlet connected to the lower part of the cold water tank.

[0015] As further limitations of this utility model, it also includes a first external exhaust pipe for supplying external energy to the outside, which is connected to the cold energy pipeline, and a second external exhaust pipe for supplying external energy to the outside, which is connected to the hot energy pipeline.

[0016] By adopting the above-mentioned technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows:

[0017] (1) This utility model realizes the recovery and reuse of waste heat in production equipment, avoids energy waste, and significantly improves energy utilization efficiency. At the same time, it uses a water source heat pump to supplement the recovered waste heat, and upgrades the waste heat into high-grade energy. Compared with other heating and cooling technologies, this utility model has low operating energy consumption and can bring significant economic benefits to enterprises.

[0018] In addition, the combination of waste heat recovery and water source heat pump energy supplementation technology can help promote the recycling of resources and energy conservation and emission reduction, thus contributing to the sustainable development of society.

[0019] (2) The air source heat pump connected in parallel with the water source heat pump in this utility model mainly plays an auxiliary role. When the water source heat pump (for example, in hot summer or cold winter) cannot meet the inlet water temperature requirements of the cold water tank or hot water tank, the air source heat pump can assist or partially replace the water source heat pump to ensure that a relatively stable heat source or cold source can be provided, reduce the impact of external environmental temperature changes on system performance, and improve the stability and reliability of the system. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is an overall pipeline flow diagram of an embodiment of the present utility model;

[0022] Figure 2 This is a pipeline flow diagram (blue part) under the condition of waste heat recovery and reuse in the embodiment of this utility model.

[0023] Figure 3 This is a pipeline flow diagram (orange-red part) under the waste heat recovery and reuse condition in the embodiment of this utility model.

[0024] Figure 4 This is a pipeline flow diagram of the water source heat pump under the supplementary energy condition in this embodiment of the utility model. The blue part is the pipeline flow diagram for supplementing cold energy, and the orange-red part is the pipeline flow diagram for supplementing heat energy.

[0025] Figure 5 This is a pipeline flow diagram of the air source heat pump under the energy replenishment condition in an embodiment of this utility model (blue represents the cooling part, orange-red represents the heating part, and green represents the common part).

[0026] Figure 6 This is a pipeline flow diagram under the working conditions of water replenishment and external network output in the embodiment of this utility model. The blue part is the pipeline flow diagram of water replenishment, the red part is the pipeline flow diagram of thermal energy external network output, and the green part is the pipeline flow diagram of cold energy external network output.

[0027] Figure 7 This is a pipeline flow diagram of the simultaneous operation of the waste cooling recovery and reuse mode and the waste heat recovery and reuse mode in the embodiment of this utility model (the blue part is waste cooling recovery and reuse, and the orange-red part is waste heat recovery and reuse).

[0028] Figure 8 This is a pipeline flow diagram showing the simultaneous operation of three working conditions: waste cooling recovery and reuse, waste heat recovery and reuse, and water source heat pump supplementation, in this embodiment of the utility model (blue part represents cold energy, and orange-red part represents heat energy).

[0029] Figure 9This is a pipeline flow diagram (orange-red part) of the operation of some production equipment under the waste heat recovery and reuse condition in this utility model embodiment, with the circulating medium entering from the top and exiting from the bottom;

[0030] Figure 10 This is a pipeline flow diagram (orange-red part) of another part of the production equipment operation under the waste heat recovery and reuse condition in this embodiment of the utility model, with the circulating medium entering from the bottom and exiting from the top;

[0031] In the diagram: 1. Hot water tank; 2. Cold water tank; 3. Water source heat pump; 4. Air source heat pump; 5. Water replenishment device; 6. Production equipment; 7. Pure water machine; 8. Storage tank; 9. Waste cold recovery pipeline; 10. Waste heat recovery main pipeline; 11. First branch pipeline; 12. Second branch pipeline; 13. Third drain pipeline; 14. Cooling circulation pipeline; 15. Heat circulation pipeline; 16. Cold energy pipeline; 17. Main heat energy pipeline; 18. Third branch pipeline; 19. Fourth branch pipeline; 20. Main water replenishment pipeline; 21. Fifth branch pipeline; 22. Sixth branch pipeline; 23. Seventh branch pipeline; 24. Eighth branch pipeline; 25. First drain pipeline; 26. Second drain pipeline. Detailed Implementation

[0032] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0033] This embodiment discloses a waste cooling and waste heat dual-effect utilization system, such as Figure 1 As shown, the system includes a hot water tank 1, a cold water tank 2, an energy recovery device, a water source heat pump 3, an air source heat pump 4, a water replenishment device 5, and instruments and meters. It also includes pipelines planned and arranged according to process and safety requirements to connect all the above devices. During operation, the medium circulates orderly between the devices through the pipelines, realizing the recovery and reuse of waste heat and cold from the production equipment 6.

[0034] In this embodiment, water is used as the circulating medium. Figures 1 to 10 In this context, A represents steam.

[0035] 1. Hot water tank 1; 2. Cold water tank 2

[0036] Hot water tank 1 is used to store hot water. Since water density varies with temperature, in the same hot water tank 1, the hotter water is usually at the top, and the colder water is usually at the bottom. Therefore, when circulating water, the hotter water is generally taken from the top of hot water tank 1 to provide the heat source, and the hot water after heat exchange returns to the bottom of hot water tank 1.

[0037] Cold water tank 2 is used to store cold water. Similarly, in the same cold water tank 2, the cold water with a higher temperature is in the upper part, and the cold water with a lower temperature is in the lower part (the cold water temperature described in this embodiment is all above 4°C). Therefore, when circulating water, cold water is pumped out from the lower part of cold water tank 2 to provide a cooling source, and the cold water that has heated up after use returns to the upper part of cold water tank 2.

[0038] In this embodiment, the hot water tank 1 and the cold water tank 2 have the same structure, both using tanks with a height greater than or equal to the diameter in existing structures. The tanks are manufactured according to the standards for thin-walled stainless steel atmospheric pressure vessels, and the exterior is insulated with heat-resistant closed-cell foam plastic used in building materials. The exterior of the insulation layer is covered with color steel plate, thin stainless steel plate, thin aluminum plate, or galvanized plate. With the tank height greater than or equal to the diameter, the water inside the tank can form stable temperature stratification. This stratification structure reduces heat exchange between the upper and lower layers of water, lowers overall energy loss, and thus achieves better energy-saving effects.

[0039] In practical applications, the volume and number of hot water tank 1 and cold water tank 2 need to be adjusted according to the actual situation of the enterprise.

[0040] II. Energy Recovery Device

[0041] The energy recovery device is used to recover waste heat and cold from production equipment 6. In this embodiment, the energy recovery device is a heat exchanger in the prior art, which is not shown in the attached drawings.

[0042] 3. Water source heat pump 3. Air source heat pump 4

[0043] Both the water source heat pump 3 and the air source heat pump 4 are existing structures, used to cool the water in the cold water tank 2 and heat the water in the hot water tank 1. During operation, the water source heat pump 3 is the main pump and the air source heat pump 4 is the auxiliary pump. When the water source heat pump 3 cannot meet the usage requirements, the air source heat pump 4 assists or partially replaces the water source heat pump 3.

[0044] IV. Water supply device 5

[0045] The water replenishment device 5 is used to replenish water to the cold water tank 2 and the hot water tank 1 so that they can maintain a standard water level during operation. In this embodiment, the water replenishment device 5 includes a water purifier 7 and a water storage tank 8 connected to the water purifier 7, wherein the water purifier 7 is connected to an external water source. Depending on the actual situation, a water softener can be used to replace the water purifier 7.

[0046] V. Instruments and Meters

[0047] Instruments and meters include a number of recording instruments, temperature instruments, level instruments, solenoid valves, check valves, circulating pumps, external supply pumps, pressure gauges, and flow meters that are automatically controlled by an automatic control system. They are arranged in pipelines and equipment according to process requirements to monitor or control parameters such as the direction, flow rate, pressure, and temperature of the circulating medium (water).

[0048] VI. Piping

[0049] The pipeline includes waste cooling recovery pipeline 9, waste heat recovery pipeline, make-up cooling circulation pipeline 14, make-up heat circulation pipeline 15, cold energy pipeline 16, heat energy pipeline and make-up water pipeline.

[0050] like Figure 2 As shown, the waste cooling recovery pipeline 9 is connected between the energy recovery device and the cold water tank 2. Specifically, the inlet of the waste cooling recovery pipeline 9 is connected to the energy recovery device, and the outlet is connected to the upper part of the cold water tank 2. During operation, the energy recovery device transfers the waste cooling in the production equipment 6 to the water in the waste cooling recovery pipeline 9, and then the waste cooling recovery pipeline 9 transports the cooled water from the upper part to the cold water tank 2.

[0051] like Figure 3 As shown, the waste heat recovery pipeline is connected between the energy recovery device and the hot water tank 1. Specifically, the waste heat recovery pipeline includes a main waste heat recovery pipe 10 and a first branch pipe 11 and a second branch pipe 12 connected to the main waste heat recovery pipe 10. The inlet of the main waste heat recovery pipe 10 is connected to the energy recovery device, the outlet of the first branch pipe 11 is connected to the upper part of the hot water tank 1, and the outlet of the second branch pipe 12 is connected to the lower part of the hot water tank 1. During operation, the energy recovery device transfers the waste heat from the production equipment 6 to the water in the main waste heat recovery pipe 10, and then distributes it according to the water temperature. If the water temperature in the main waste heat recovery pipe 10 is higher than that in the hot water tank 1, it is transported from the upper part to the hot water tank 1 through the first branch pipe 11. If the water temperature in the main waste heat recovery pipe 10 is lower than that in the hot water tank 1, it is transported from the lower part to the hot water tank 1 through the second branch pipe 12.

[0052] This embodiment also includes a third drain pipe 13 connected to the waste heat recovery main pipe 10. The third drain pipe 13 can re-transport the water in the waste heat recovery main pipe 10 to the production equipment 6 for use, such as for moistening the raw materials when brewing soy sauce.

[0053] The cooling circulation pipe 14 is connected and installed between the water source heat pump 3 and the cold water tank 2, such as... Figure 4 As shown, the inlet of the cooling circulation pipe 14 is connected to the upper part of the cold water tank 2, and the outlet is connected to the lower part of the cold water tank 2. During operation, the cold water with a higher temperature in the upper part of the cold water tank 2 enters the water source heat pump 3 through the cooling circulation pipe 14, and after heat exchange and cooling, it returns to the lower part of the cold water tank 2 through the cooling circulation pipe 14.

[0054] The heat exchange circulation pipe 15 is connected and installed between the water source heat pump 3 and the hot water tank 1, such as... Figure 4As shown, the inlet of the heat exchange circulation pipe 15 is connected to the lower part of the hot water tank 1, and the outlet is connected to the upper part of the hot water tank 1. During operation, the hot water at a lower temperature at the lower part of the hot water tank 1 enters the water source heat pump 3 through the heat exchange circulation pipe 15, and after heat exchange and temperature increase, it returns to the upper part of the hot water tank 1 through the heat exchange circulation pipe 15.

[0055] Furthermore, in this embodiment, the air source heat pump 4 and the water source heat pump 3 are connected in parallel, and the air source heat pump 4 and the water source heat pump 3 share the aforementioned cooling circulation pipe 14 and heating circulation pipe 15. Specifically, as follows... Figure 5 As shown, branch pipes are added so that the air source heat pump 4 can be connected to the cold water tank 2 through the cooling circulation pipe 14 and to the hot water tank 1 through the heating circulation pipe 15. It should be noted that the air source heat pump 4 cannot perform both cooling and heating simultaneously. Therefore, under the control of the valves, the outlet of the air source heat pump 4 can only be connected to either the cold water tank 2 or the hot water tank 1. When the air source heat pump 4 is in cooling mode, it is connected to the cold water tank 2, with its inlet connected to the upper part of the cold water tank 2 and its outlet connected to the lower part. When the air source heat pump 4 is in heating mode, it is connected to the hot water tank 1, with its inlet connected to the lower part of the hot water tank 1 and its outlet connected to the upper part.

[0056] A cold energy pipeline 16 is installed between the cold water tank 2 and the production equipment 6 to supply the low-temperature chilled water stored in the cold water tank 2 to the production equipment 6. Specifically, the inlet of the cold energy pipeline 16 is connected to the lower part of the cold water tank 2, and the outlet is connected to the production equipment 6 (generally for heat exchange, rather than direct use of the low-temperature chilled water). During operation, the low-temperature chilled water in the lower part of the cold water tank 2 is transported to the production equipment 6 through the cold energy pipeline 16 to provide a cooling source.

[0057] A heat supply pipeline is installed between the hot water tank 1 and the production equipment 6 to supply the high-temperature hot water stored in the hot water tank 1 to the production equipment 6. Specifically, the heat supply pipeline includes a main heat supply pipe 17 and a third branch pipe 18 and a fourth branch pipe 19 connected to the main heat supply pipe 17. The inlet of the third branch pipe 18 connects to the upper part of the hot water tank 1, the inlet of the fourth branch pipe 19 connects to the lower part of the hot water tank 1, and the outlet of the main heat supply pipe 17 connects to the production equipment 6. During operation, the system selects the appropriate route based on the water temperature inside the hot water tank 1: if the overall water temperature inside the tank is high, the fourth branch pipe 19 is used to supply the high-temperature hot water from the lower part to the production equipment 6. Figure 9 As shown; if there is significant stratification of water temperature inside the tank, with a higher temperature at the top and a lower temperature at the bottom, a third branch pipe 18 can be used to transport the high-temperature hot water from the top to the production equipment 6, such as... Figure 10 As shown.

[0058] The water supply pipeline is connected between the cold water tank 2 and the water supply device 5, and between the hot water tank 1 and the water supply device 5. Specifically... Figure 6As shown, the water supply pipeline includes a main water supply pipe 20 and five branch pipes 21, 22, 23, and 24 connected to it. The inlet of the main water supply pipe 20 is connected to the water storage tank 8 in the water supply device 5. The outlet of the fifth branch pipe 21 is connected to the upper part of the hot water tank 1, the outlet of the sixth branch pipe 22 is connected to the upper part of the cold water tank 2, the outlet of the seventh branch pipe 23 is connected to the lower part of the hot water tank 1, and the outlet of the eighth branch pipe 24 is connected to the lower part of the cold water tank 2. During water replenishment, water with a temperature higher than the water in the tank is replenished from the top, and water with a temperature lower than the water in the tank is replenished from the bottom.

[0059] It should be added that this embodiment also includes a first external discharge pipe 25 and a second external discharge pipe 26. For example... Figure 6 As shown, the first drain pipe 25 is connected to the cold energy pipeline 16 to supply water from the cold water tank 2 to the outside; the second drain pipe 26 is connected to the heat energy pipeline to supply water from the hot water tank 1 to the outside. When supplying hot water, it is generally drawn from the upper part of the hot water tank 1 via the third branch pipeline 18 and the main heat energy pipeline 17. Alternatively, the second drain pipe 26 may be connected to both the third branch pipeline 18 and the fourth branch pipeline 19, allowing the high-temperature hot water from the upper part of the hot water tank 1 and the low-temperature hot water from the lower part to simultaneously enter the second drain pipe 26. The water is then mixed and temperature-adjusted in the second drain pipe 26 before being discharged, resulting in a discharged water temperature lower than the high-temperature hot water from the upper part of the hot water tank 1 but higher than the low-temperature hot water from the lower part. The temperature of the supplied hot water is adjusted by the valve opening.

[0060] This embodiment also discloses an operation method for a waste cooling and waste heat dual-effect utilization system, based on the waste cooling and waste heat dual-effect utilization system described above, including multiple operating conditions:

[0061] One is the waste cooling recovery and reuse operation: such as Figure 2 As shown, the inlet of the waste cooling recovery pipeline 9 is connected to the energy recovery device, and the outlet is connected to the cold water tank 2, so as to recover the waste cooling in the production equipment 6 to the cold water tank 2; the inlet of the cold energy pipeline 16 is connected to the cold water tank 2, and the outlet is connected to the production equipment 6, so as to supply the cold energy stored in the cold water tank 2 to the production equipment 6.

[0062] The second is the waste heat recovery and reuse operation: such as Figure 3 As shown, the inlet of the waste heat recovery pipeline is connected to the energy recovery device, and the outlet is connected to the hot water tank 1, so as to recover the waste heat in the production equipment 6 to the hot water tank 1; the inlet of the heat energy pipeline is connected to the hot water tank 1, and the outlet is connected to the production equipment 6, so as to supply the heat energy stored in the hot water tank 1 to the production equipment 6.

[0063] Thirdly, the water source heat pump's energy replenishment mode: such as... Figure 4As shown, the cooling circulation pipeline 14 is connected to the cold water tank 2 and the water source heat pump 3, and the heating circulation pipeline 15 is connected to the hot water tank 1 and the water source heat pump 3; the water source heat pump 3 is started to replenish the cold energy of the cold water tank 2 and replenish the heat energy of the hot water tank 1 at the same time.

[0064] Fourthly, the air source heat pump 4-stage energy replenishment mode: such as Figure 5 As shown, the cooling circulation control line 14 is connected to the cold water tank 2 and the air source heat pump 4, and the heating circulation control line 15 is connected to the hot water tank 1 and the air source heat pump 4. The air source heat pump 4 is started to replenish either the cooling energy to the cold water tank 2 or the heating energy to the hot water tank 1 (the air source heat pump 4 cannot simultaneously replenish both cooling and heating energy; only one can be replenished). It should be noted that, under normal circumstances, the air source heat pump 4 does not operate independently but is operated synchronously with the water source heat pump 3.

[0065] Fifthly, water replenishment conditions: such as Figure 6 As shown, the water supply pipeline is connected to the cold water tank 2, and the water supply device 5 is activated to supply water to the cold water tank 2; or the water supply pipeline is connected to the hot water tank 1, and the water supply device 5 is activated to supply water to the hot water tank 1; or water is supplied to both the cold water tank 2 and the hot water tank 1 at the same time.

[0066] It should be noted that a water temperature test is required before adding water to the cold water tank 2. If the water temperature in the water replenishment device 5 is higher than that in the cold water tank 2, the water replenishment pipeline is connected to the upper part of the cold water tank 2; if the water temperature in the water replenishment device 5 is lower than that in the cold water tank 2, the water replenishment pipeline is connected to the lower part of the cold water tank 2.

[0067] Before adding water to the hot water tank 1, the water temperature needs to be tested. If the water temperature in the water replenishment device 5 is higher than that in the hot water tank 1, the water replenishment pipe is connected to the upper part of the hot water tank 1. If the water temperature in the water replenishment device 5 is lower than that in the hot water tank 1, the water replenishment pipe is connected to the lower part of the hot water tank 1.

[0068] Sixthly, the external network supply conditions: such as Figure 6 As shown, the inlet of the cold energy pipeline 16 is connected to the cold water tank 2, and the first drain pipe 25 is connected to the cold energy pipeline 16 to supply the cold energy (cold water) stored in the cold water tank 2 to the external network. The inlet of the hot energy pipeline is connected to the hot water tank 1, and the second drain pipe 26 is connected to the hot energy pipeline to supply the hot energy (hot water) stored in the hot water tank 1 to the external network. It should be noted that, to ensure the water levels in the cold water tank 2 and the hot water tank 1, the external network supply mode usually operates synchronously with the water replenishment mode.

[0069] In this embodiment, all of the above operating conditions can operate in parallel or partially in parallel. For example: Figure 7 As shown, operating conditions one and two operate synchronously, performing both waste heat recovery and reuse; as... Figure 8As shown, based on the synchronous operation of operating conditions one and two, operating condition three is added, which uses the water source heat pump 3 to supplement energy to ensure that the water temperature in cold water tank 2 and hot water tank 1 always meets the usage requirements.

[0070] The power supply to some production equipment 6 in this embodiment can be controlled via a distributor. For example: Figure 9 As shown, during operation mode two, power is supplied only to the left-side production equipment 6; as Figure 10 As shown, during operation mode two, energy is supplied only to production equipment 6 on the right. Alternatively, heat energy can be supplied to one side of production equipment 6 and cooling energy to the other side via a distributor; this can be done simultaneously or separately.

[0071] It should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A system for double-effect utilization of waste heat and waste cold, characterized in that: The energy recovery device is connected with the cold water tank through a waste-heat recovery pipeline and with the hot water tank through a waste-heat recovery pipeline. The water source heat pump is connected with the cold water tank through a cold-heat supplement pipeline and with the hot water tank through a heat-heat supplement pipeline.

2. The system according to claim 1, wherein: The outlet of the waste-heat recovery pipeline is connected with the upper part of the cold water tank, and the waste-heat recovery pipeline comprises a first branch pipeline with an outlet connected with the upper part of the hot water tank and a second branch pipeline with an outlet connected with the lower part of the hot water tank. The inlet of the cold-heat supplement pipeline is connected with the upper part of the cold water tank, and the outlet of the cold-heat supplement pipeline is connected with the lower part of the cold water tank. The inlet of the heat-heat supplement pipeline is connected with the lower part of the hot water tank, and the outlet of the heat-heat supplement pipeline is connected with the upper part of the hot water tank. The inlet of the cold-heat supplement pipeline is connected with the upper part of the cold water tank, and the outlet of the cold-heat supplement pipeline is connected with the lower part of the cold water tank.

3. The system according to claim 1 or 2, characterized in that: The inlet of the heat-heat supplement pipeline is connected with the lower part of the hot water tank, and the outlet of the heat-heat supplement pipeline is connected with the upper part of the hot water tank.

4. The system according to claim 3, wherein: The inlet of the cold-heat supplement pipeline is connected with the upper part of the cold water tank, and the outlet of the cold-heat supplement pipeline is connected with the lower part of the cold water tank.

5. The system according to any one of claims 1, 2, 4, wherein: The inlet of the heat-heat supplement pipeline is connected with the lower part of the hot water tank, and the outlet of the heat-heat supplement pipeline is connected with the upper part of the hot water tank.

6. The system according to claim 5, wherein: The energy recovery device comprises a heat exchanger for transferring waste heat in the production equipment to a medium in the waste-heat recovery pipeline or transferring waste heat to a medium in the waste-heat recovery pipeline.

7. The system according to any one of claims 1, 2, 4, 6, wherein: The air source heat pump is connected with the cold water tank through the cold-heat supplement pipeline and with the hot water tank through the heat-heat supplement pipeline. The water supplement device is connected with the cold water tank and the hot water tank through a water supplement pipeline. The water supplement pipeline comprises a fifth branch pipeline with an outlet connected with the upper part of the hot water tank, a sixth branch pipeline with an outlet connected with the upper part of the cold water tank, a seventh branch pipeline with an outlet connected with the lower part of the hot water tank, and an eighth branch pipeline with an outlet connected with the lower part of the cold water tank. The first external discharge pipeline connected with the cold-heat pipeline and the second external discharge pipeline connected with the heat-heat pipeline are provided for supplying external energy.

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