A comprehensive energy management system for a pharmaceutical process and a control method thereof

Abstract

The application discloses a comprehensive energy management system for a pharmaceutical process and a control method thereof, which comprises a sterilization process module, a waste heat recovery module, a high-temperature heating module and a heat pump unit. The sterilization process module comprises a sterilization kettle, a hot water tank, a cold water tank, a first heat exchanger and a first cold exchanger. The waste heat recovery module comprises a second cold exchanger connected in series with the first cold exchanger, and the inlet and outlet of the second cold exchanger are connected with the cold water tank and a waste heat recovery water tank respectively. The high-temperature heating module comprises a second heat exchanger connected in series with the first heat exchanger, and the inlet and outlet of the second heat exchanger are connected with the hot water tank and a heating recovery water tank respectively. The heat pump unit comprises a condenser evaporator for heat conversion between the waste heat recovery module and the high-temperature heating module. The scheme integrates multiple functional modules such as waste heat recovery, heat pump promotion, high-temperature energy storage, heat conversion and sterilization process into one comprehensive energy management system, and the system is stable in operation, low in cost and high in energy utilization.

Description

Technical Field

[0001] This invention relates to the field of industrial energy management and waste heat recovery technology, specifically to a comprehensive energy management system and its control method for pharmaceutical processes. Background Technology

[0002] In the pharmaceutical industry (such as sterilization process), the production process usually includes two stages: high-temperature heating and rapid cooling. In the traditional solution, heating relies on natural gas boilers to generate steam, while cooling is achieved by releasing heat into the atmosphere through cooling towers. This model has drawbacks such as serious energy waste, high operating costs, and independent system disconnect. In particular, when trying to use heat pumps to recover waste heat to produce high-temperature media above 130°C, the system needs to overcome extremely large temperature differences and high pressure ratios, resulting in extremely low single-stage compression cycle efficiency and unstable operation.

[0003] In the pharmaceutical industry, autoclave manufacturing is a crucial step in drug production, typically involving two stages: high-temperature heating and rapid cooling. Taking autoclave manufacturing as an example, the heating stage requires a high-temperature medium exceeding 130°C for sterilization, while the cooling stage necessitates rapidly cooling the material from its high temperature to room temperature. Traditional solutions rely on natural gas boilers to generate steam for heating, while cooling is achieved by directly releasing heat into the atmosphere through cooling towers. This "boiler for heating, exhaust for cooling" approach has the following significant drawbacks: 1. Severe energy waste: A large amount of low-grade waste heat generated during the cooling process is directly discharged into the atmosphere without any form of recovery or utilization. Meanwhile, the heating process requires a large amount of natural gas or electricity to regenerate heat, resulting in a double waste of energy. Pure steam generators in pharmaceutical water treatment equipment typically use industrial steam as a heat source, making the problems of high energy consumption and high costs particularly prominent.

[0004] 2. High operating costs: The fuel costs of natural gas boilers continue to rise, coupled with the electricity consumption and maintenance costs of cooling towers, resulting in energy expenditures accounting for a large proportion of the total production costs for pharmaceutical companies. Related research indicates that the energy costs of traditional electric heating or gas-fired boilers are significantly higher than those of heat pump recovery solutions.

[0005] 3. Heating and cooling systems are independent and disconnected: In traditional solutions, the heating and cooling systems operate independently, lacking energy coupling and synergy. The heating system only generates heat, and the cooling system only dissipates heat; there is no energy transfer or recycling between the two systems, resulting in low overall energy efficiency.

[0006] 4. Technical Bottlenecks in High-Temperature Heat Pump Applications: In recent years, some existing technologies have attempted to utilize heat pumps to recover waste heat to produce high-temperature media. However, when producing media above 130°C, the heat pump system needs to overcome extremely large temperature differences and pressure ratios. Single-stage compression cycles are extremely inefficient and unstable under these conditions, making it difficult to meet the stability and reliability requirements of pharmaceutical processes for high-temperature media. Furthermore, existing two-stage compression heat pump systems suffer from poor energy utilization in high ambient temperatures.

[0007] In summary, the existing technology lacks a comprehensive energy management system that can effectively recover waste heat from pharmaceutical process cooling, stably produce high-temperature media above 130°C, and integrate heating and cooling systems into a unified energy network. Summary of the Invention

[0008] To address the aforementioned shortcomings of existing technologies, this invention provides a comprehensive energy management system and its control method for pharmaceutical processes, which solves the problems of large temperature differences, high pressure ratios, and unstable operation during waste heat recovery.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, a comprehensive energy management system for pharmaceutical processes is provided, comprising: The sterilization process module includes a sterilization vessel, a hot water tank and a cold water tank for replenishing the sterilization vessel with high-temperature purified water and low-temperature purified water, respectively, and a first hot plate heat exchanger and a first cold plate heat exchanger for providing circulating heating and circulating cooling to the sterilization vessel, respectively. The waste heat recovery module includes a second cold plate heat exchanger connected in series with the first cold plate heat exchanger. The inlet and outlet of the second cold plate heat exchanger are respectively connected to a cold water tank and a waste heat recovery water tank, and the waste heat recovery water tank and the cold water tank are respectively connected to the inlet and outlet of the heat exchange channel of the evaporator. The high-temperature heating module includes a second heat exchanger connected in series with the first heat exchanger. The inlet and outlet of the second heat exchanger are connected to a hot water tank and a heating recovery water tank, respectively. The heating recovery water tank and the hot water tank are connected to the inlet and outlet of the heat exchange channel on the condenser, respectively. A heat pump unit includes a condenser-evaporator, wherein the condensation channel of the condenser-evaporator is connected in a closed loop with the evaporation channel of the evaporator, the evaporation channel of the condenser-evaporator is connected in a closed loop with the condensation channel of the condenser-evaporator, and the inlet and outlet of the heat exchange channel of the condenser-evaporator are connected to a waste heat recovery water tank and a cold water tank, respectively. The control module is used to detect the operating status of the sterilization process module, regulate the start and stop of the waste heat recovery module and the high-temperature heating module, and the connection status of the heat pump unit.

[0010] Secondly, a control method for an integrated energy management system for pharmaceutical processes is provided, comprising the following steps: S1: The control module detects the operating status of the sterilization process module. When it is in cooling mode, step S2 is executed; when it is in heating mode, step S6 is executed. S2: The cooling water in the cold water tank is transferred to the waste heat recovery water tank after passing through the second cold plate heat exchanger via the waste heat recovery module. S3: Monitor the temperature of the waste heat recovery water tank in real time. If the temperature is higher than the set threshold, proceed to step S4; if the temperature is not higher than the set threshold, proceed to step S5. S4: Connect the inlet of the heat exchange channel of the condenser evaporator to the waste heat recovery water tank through an electric three-way valve, and connect the outlet to the waste heat recovery water tank or cold water tank through an electric three-way valve. Start the secondary compressor and run the heat pump unit in single-stage compression mode to directly compress the heat energy of the waste heat recovery water tank and convert it into high-grade heat energy stored in the hot water tank. S5: Connect the inlet of the heat exchange channel of the evaporator to the waste heat recovery water tank through an electric three-way valve, and connect the outlet to the waste heat recovery water tank or cold water tank through an electric three-way valve. Start the first-stage compressor and the second-stage compressor, and operate the heat pump unit in a cascade operation mode to compress the heat energy of the waste heat recovery water tank through two stages and convert it into high-grade heat energy for storage in the hot water tank. S6: The hot water in the hot water tank is transferred to the heating and recovery water tank through the second heat exchange plate via the high-temperature heating module.

[0011] The beneficial effects of this invention are as follows: 1. This solution achieves optimal energy efficiency ratio under different temperature difference conditions through dynamic switching between two-stage heat pump operation modes. Specifically, when the temperature of the waste heat recovery water tank is higher than the set threshold, a single-stage compression mode is adopted to maximize the utilization of high-grade waste heat and reduce power input. When the temperature drops below the set threshold, it switches to a cascade operation mode. Through the coordinated work of the two-stage compression, the system can stably overcome the pressure span caused by large temperature differences, ensuring that the condenser end stably produces high-temperature media above 130°C, thereby improving the energy efficiency ratio and meeting the stringent requirements of pharmaceutical sterilization processes.

[0012] 2. This solution integrates the heating and cooling systems of the pharmaceutical process into a single energy flow network. The waste heat generated during the cooling process is upgraded by the heat pump unit and directly used for heating needs, realizing the recycling of energy within the process; eliminating dependence on cooling towers and avoiding the ineffective waste of heat being directly discharged into the atmosphere in traditional solutions.

[0013] 3. This solution utilizes off-peak electricity pricing periods to start the heat pump for thermal energy storage, and releases the stored thermal energy during peak energy consumption periods. Compared with the traditional solution that relies on natural gas boilers, this reduces heat costs and improves the system's economic efficiency. At the same time, the heat pump is driven by electricity, avoiding cost uncertainties caused by fluctuations in natural gas prices.

[0014] 4. This solution organically integrates multiple functional modules such as waste heat recovery, heat pump boosting, high-temperature energy storage, heat conversion, and sterilization processes into a comprehensive energy management system. It is stable in operation, low in cost, and highly efficient in energy utilization. The modules can be flexibly switched and coordinated through valves and pipelines, and can be widely used in the pharmaceutical industry and other industrial fields with similar large temperature difference energy consumption characteristics. The system has a high degree of integration and strong applicability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The above and other objects, features, and advantages of the present invention will become clearer through the accompanying drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not intentionally drawn to scale to actual dimensions; the focus is on illustrating the main points of the invention.

[0016] Figure 1 This is a schematic diagram of the integrated energy management system used in the pharmaceutical process according to this scheme.

[0017] The components include: 1. Sterilization vessel; 2. Hot water tank; 3. Cold water tank; 4. First hot plate heat exchanger; 5. First cold plate heat exchanger; 6. Switch valve; 7. Piston pump; 8. Second cold plate heat exchanger; 9. Cold water tank; 10. Waste heat recovery water tank; 11. Evaporator; 12. Second hot plate heat exchanger; 13. Hot water tank; 14. Heating recovery water tank; 15. Condenser; 16. Condensing evaporator; 17. First-stage compressor; 18. Expansion valve; 19. Second-stage compressor; 20. Electric three-way valve; 21. Water pump. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0022] like Figure 1 As shown, this solution is used for a comprehensive energy management system for pharmaceutical processes, including a sterilization process module, a waste heat recovery module, a high-temperature heating module, a heat pump unit, and a control module.

[0023] The sterilization process module includes a sterilizer 1, a hot water tank 2 and a cold water tank 3 for replenishing high-temperature purified water and low-temperature purified water to the sterilizer 1, respectively, and a first hot plate heat exchanger 4 and a first cold plate heat exchanger 5 for providing circulating heating and circulating cooling to the sterilizer 1, respectively. Specifically, the outlets of the hot water tank 2 and the cold water tank 3 are connected to the water supply port of the sterilizer 1 through a switch valve 6. The outlet of the sterilizer 1 is connected to the inlets of the hot water tank 2, the cold water tank 3, the first hot plate heat exchanger 4, and the first cold plate heat exchanger 5 through a switch valve 6 and a plunger pump 7, respectively. The outlets of the first hot plate heat exchanger 4 and the first cold plate heat exchanger 5 are connected to the return port of the sterilizer 1 through a switch valve 6. The inlet and outlet of the first hot plate heat exchanger 4 are connected to the steam inlet pipe and the condensate outlet pipe, respectively. The inlet and outlet of the first cold plate heat exchanger 5 are connected to the cooling water inlet pipe and the cooling water outlet pipe, respectively.

[0024] The waste heat recovery module includes a second cold plate heat exchanger 8 connected in series with the first cold plate heat exchanger 5. The inlet and outlet of the second cold plate heat exchanger 8 are connected to the cold water tank 9 and the waste heat recovery water tank 10, respectively. The waste heat recovery water tank 10 and the cold water tank 9 are connected to the inlet and outlet of the heat exchange channel of the evaporator 11, respectively.

[0025] The high-temperature heating module includes a second heat exchanger 12 connected in series with the first heat exchanger 4. The inlet and outlet of the second heat exchanger 12 are respectively connected to the hot water tank 13 and the heating recovery water tank 14, and the heating recovery water tank 14 and the hot water tank 13 are respectively connected to the inlet and outlet of the heat exchange channel on the condenser 15. The heat pump unit includes a condenser-evaporator 16, whose condensation channel is connected in a closed loop to the evaporation channel of the evaporator 11, and a primary compressor 17 and an expansion valve 18 are installed in the closed loop; the evaporation channel of the condenser-evaporator 16 is connected in a closed loop to the condensation channel of the condenser 15, and a secondary compressor 19 and an expansion valve 18 are installed in the closed loop; the waste heat recovery water tank 10 is connected to the inlet of the heat exchange channel of the evaporator 11 and the inlet of the heat exchange channel of the condenser-evaporator 16 respectively through an electric three-way valve 20; and the cold water tank 9 is connected to the outlet of the heat exchange channel of the evaporator 11 and the outlet of the heat exchange channel of the condenser-evaporator 16 respectively through an electric three-way valve 20.

[0026] The control module is used to detect the operating status of the sterilization process module, regulate the start and stop of the waste heat recovery module and the high-temperature heating module, and the connection status of the heat pump unit.

[0027] In this scheme, water pumps 21 are installed on the pipelines at the rear ends of the cold water tank 9, the waste heat recovery water tank 10, the hot water tank 13, and the heating recovery water tank 14; an electric three-way valve 20 connected to the waste heat recovery water tank 10 is installed on the pipeline at the front end of the cold water tank 9, and an electric three-way valve 20 connected to the heating recovery water tank 14 is installed on the pipeline at the front end of the hot water tank 13.

[0028] This solution also provides a control method for an integrated energy management system for pharmaceutical processes, which includes the following steps: S1: The control module detects the operating status of the sterilization process module. When it is in cooling mode, step S2 is executed; when it is in heating mode, step S6 is executed. S2: The cooling water in the cold water tank 9 is heated by the second cold plate heat exchanger 8 and then enters the waste heat recovery water tank 10 through the waste heat recovery module. S3: Monitor the temperature of the waste heat recovery water tank 10 in real time. If the temperature is higher than the set threshold, proceed to step S4; if the temperature is not higher than the set threshold, proceed to step S5. S4: Connect the inlet of the heat exchange channel of the condenser evaporator 16 to the waste heat recovery water tank 10 through the electric three-way valve 20, and connect the outlet to the waste heat recovery water tank 10 or the cold water tank 9 through the electric three-way valve 20. Start the secondary compressor 19 and operate the heat pump unit in single-stage compression mode to directly compress the heat energy of the waste heat recovery water tank 10 and convert it into high-grade heat energy stored in the hot water tank 13, so as to minimize the input of electrical energy. S5: Connect the inlet of the heat exchange channel of the evaporator 11 to the waste heat recovery water tank 10 through the electric three-way valve 20, and connect the outlet to the waste heat recovery water tank 10 or the cold water tank 9 through the electric three-way valve 20. Start the first-stage compressor 17 and the second-stage compressor 19. The heat pump unit operates in a cascade mode to compress the heat energy of the waste heat recovery water tank 10 through two stages and convert it into high-grade heat energy for storage in the hot water tank 13. S6: The hot water in the hot water tank 13 is heated by the high temperature heating module and then enters the heating and recovery water tank 14 after the heat is released by the second heat exchanger 12.

[0029] This solution achieves optimal energy efficiency ratio under varying temperature differences by dynamically switching between two-stage heat pump operation modes. When the temperature of the waste heat recovery tank 10 exceeds the set threshold, a single-stage compression mode is adopted to maximize the utilization of high-grade waste heat and reduce electrical energy input. When the temperature drops below the set threshold, the system switches to a cascade operation mode. Through the coordinated operation of the two-stage compression, the system can stably overcome the pressure span caused by large temperature differences, ensuring a stable output of high-temperature media above 130°C at the condenser end, thereby improving the energy efficiency ratio and meeting the stringent requirements of pharmaceutical sterilization processes.

[0030] Before executing step S3, this solution uses the control module to detect whether it is currently in a low-price electricity period. If so, step S3 is executed; otherwise, the control module monitors the cooling water level in real time, and when the water level reaches the minimum level, step S3 is executed. This solution utilizes the low-price electricity period to start the heat pump for heat energy storage, and releases the stored heat energy during peak energy consumption. Compared with the traditional solution that relies on natural gas boilers, this reduces heat costs and improves the system's economic efficiency. At the same time, the heat pump is driven by electricity, avoiding cost uncertainties caused by fluctuations in natural gas prices.

[0031] The working principle of each module in this solution will be explained in detail below: 1. Sterilization process module: The sterilization process module is the energy terminal and waste heat source; hot water tank 2 and cold water tank 3 store high-temperature purified water and low-temperature purified water respectively, and supply liquid to sterilizer 1 in sequence according to the sterilization batch time sequence; the energy system of this scheme does not directly change the internal process of sterilizer 1, but completes the heat input and waste heat recovery externally through the added second hot plate heat exchanger 12 and second cold plate heat exchanger 8.

[0032] Heating stage: The control module opens the corresponding switch valve 6 and starts the plunger pump 7, allowing high-temperature purified water to enter the sterilizer 1. On the energy side, the hot water tank 13 continuously replenishes heat via the first hot plate heat exchanger 4 and the second hot plate heat exchanger 12. Cooling stage: The control module opens the corresponding switch valve 6 and starts the plunger pump 7, allowing low-temperature purified water to enter the sterilizer 1 to absorb the residual heat from the drugs. On the energy side, the first cold plate heat exchanger 5 and the first cold plate heat exchanger 6 continuously absorb heat. After the batch ends: The control module records the heat used in this batch, the temperature of the recovered residual heat, the temperature drop of the hot water tank 13, and the temperature rise of the residual hot water tank 13, for subsequent control strategy optimization.

[0033] 2. Waste heat recovery module: The function of the waste heat recovery module is to collect the heat generated during the cooling stage of the sterilizer 1 into the waste heat recovery water tank 10, which serves as a low-grade heat source for the heat pump unit. After cooling begins, the control module opens the cooling water circuit, and the water pump 21 sends the approximately 40°C cooling water from the cold water tank 9 into the second cold plate heat exchanger 8. The cooling water is heated after indirect heat exchange with the purified water carrying the residual heat of the medicine, and then enters the waste heat recovery water tank 10.

[0034] 3. High-temperature heating module: The high-temperature energy storage module is responsible for converting the high-grade heat energy generated at the condenser end of the heat pump into hot water reserves that can be called up in batches; the hot water tank 13 serves as an energy storage container to store high-temperature water above 130°C; the heating and recovery water tank 14 receives return water at around 100°C to 110°C after heat exchange by the second heat exchanger 12; the condenser 15 reheats the return water and sends it back to the hot water tank 13.

[0035] 4. Heat pump unit: The heat pump unit is an energy enhancement device between the waste heat recovery module and the high-temperature heating module; it is used to absorb the low-grade heat from the waste heat recovery module and output high-temperature hot water above 130℃ to the high-temperature heating module. It has two operating modes: single-stage compression and cascade, which are selected by the control module according to the real-time water temperature status of the waste heat recovery water tank 10.

[0036] First operating mode: single-stage compression operation; when the real-time water temperature of the waste heat recovery water tank 10 is higher than the preset threshold upper limit, the waste heat quality is high and the evaporation end temperature is high, and single-stage compression can meet the high temperature output of the condensing end; connect the inlet of the heat exchange channel of the condenser evaporator 16 to the waste heat recovery water tank 10 through the electric three-way valve 20, and connect the outlet to the waste heat recovery water tank 10 or the cold water tank 9 through the electric three-way valve 20, start the second-stage compressor 19, and stop the first-stage compressor 17.

[0037] The refrigerant circulation path is: secondary compressor 19 → condenser 15 → expansion valve 18 → condenser evaporator 16 → secondary compressor 19; the waste heat circuit is: waste heat recovery water tank 10 → condenser evaporator 16 → cold water tank 9; the high temperature water circuit is: heating recovery water tank 14 → condenser 15 → hot water tank 13.

[0038] Second operating mode: cascade operation; when the real-time water temperature of the waste heat recovery water tank 10 is lower than the preset threshold lower limit, if single-stage compression is still used, the compression ratio will increase, the exhaust temperature and current will rise, resulting in a decrease in COP; Therefore, the control module connects the inlet of the heat exchange channel of the evaporator 11 to the waste heat recovery water tank 10 through the electric three-way valve 20, and the outlet is connected to the waste heat recovery water tank 10 or the cold water tank 9 through the electric three-way valve 20, starting the first-stage compressor 17 and the second-stage compressor 19; thus putting the system into cascade operation; the cascade operation connects the low-temperature stage and the high-temperature stage through the condenser evaporator 16, the low-temperature stage is responsible for absorbing heat from the waste heat side and raising it to the intermediate temperature, and the high-temperature stage is responsible for absorbing heat from the intermediate temperature and further raising it to the high temperature at the condensing end.

[0039] Low-temperature stage circuit: Evaporator 11 absorbs waste heat → primary compressor 17 compresses → condenser evaporator 16 releases heat → expansion valve 18 throttles → returns to evaporator 11; High-temperature stage circuit: condenser evaporator 16 absorbs heat → secondary compressor 19 compresses → condenser 15 releases heat to the water side → expansion valve 18 throttles → returns to condenser evaporator 16.

[0040] The cascade operation mode of this scheme reduces the pressure span and exhaust temperature of a single compressor by sharing the pressure ratio through two-stage compression, so that the system can still stably produce high-temperature water above 130℃ under low waste heat temperature.

[0041] In summary, this solution organically integrates multiple functional modules such as waste heat recovery, heat pump boosting, high-temperature energy storage, heat conversion, and sterilization processes into a comprehensive energy management system. It is stable in operation, low in cost, and highly efficient in energy utilization. The modules can be flexibly switched and coordinated through valves and pipelines, and can be widely used in the pharmaceutical industry and other industrial fields with similar large temperature difference energy consumption characteristics. The system has a high degree of integration and strong applicability.

[0042] Although the specific embodiments of the invention have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent; various modifications and variations that can be made by a person skilled in the art without inventive effort within the scope described in the claims are still within the scope of protection of this patent.

Claims

1. A comprehensive energy management system for pharmaceutical processes, comprising a sterilization process module, the sterilization process module comprising a sterilizer, a hot water tank and a cold water tank for replenishing the sterilizer with high-temperature purified water and low-temperature purified water respectively, and a first hot plate heat exchanger and a first cold plate heat exchanger for providing circulating heating and circulating cooling to the sterilizer respectively; characterized in that, Also includes: The waste heat recovery module includes a second cold plate heat exchanger connected in series with the first cold plate heat exchanger. The inlet and outlet of the second cold plate heat exchanger are respectively connected to a cold water tank and a waste heat recovery water tank, and the waste heat recovery water tank and the cold water tank are respectively connected to the inlet and outlet of the heat exchange channel of the evaporator. A high-temperature heating module includes a second heat exchanger connected in series with a first heat exchanger. The inlet and outlet of the second heat exchanger are respectively connected to a hot water tank and a heating recovery water tank, and the heating recovery water tank and the hot water tank are respectively connected to the inlet and outlet of the heat exchange channel on the condenser. A heat pump unit includes a condenser-evaporator, wherein the condensation channel of the condenser-evaporator is connected in a closed loop with the evaporation channel of the evaporator, the evaporation channel of the condenser-evaporator is connected in a closed loop with the condensation channel of the condenser-evaporator, and the inlet and outlet of the heat exchange channel of the condenser-evaporator are respectively connected to a waste heat recovery water tank and a cold water tank. The control module is used to detect the operating status of the sterilization process module, regulate the start and stop of the waste heat recovery module and the high-temperature heating module, and the connection status of the heat pump unit.

2. The integrated energy management system for pharmaceutical processes according to claim 1, characterized in that, The waste heat recovery water tank is connected to the inlet of the heat exchange channel of the evaporator and the inlet of the heat exchange channel of the condenser-evaporator via an electric three-way valve, and the cold water tank is connected to the outlet of the heat exchange channel of the evaporator and the outlet of the heat exchange channel of the condenser-evaporator via an electric three-way valve.

3. The integrated energy management system for pharmaceutical processes according to claim 1, characterized in that, Water pumps are installed on the pipelines at the rear ends of the cold water tank, waste heat recovery water tank, hot water tank, and heating recovery water tank.

4. The integrated energy management system for pharmaceutical processes according to claim 1, characterized in that, An electric three-way valve connected to the waste heat recovery water tank is installed on the pipeline at the front end of the cold water tank, and an electric three-way valve connected to the heating recovery water tank is installed on the pipeline at the front end of the hot water tank.

5. The integrated energy management system for pharmaceutical processes according to claim 1, characterized in that, A primary compressor and an expansion valve are installed on the closed loop formed by the condensation channel of the condenser and the evaporation channel of the evaporator, and a secondary compressor and an expansion valve are installed on the closed loop formed by the evaporation channel of the condenser and the condensation channel of the condenser.

6. A control method for a comprehensive energy management system for pharmaceutical processes according to any one of claims 1-5, characterized in that, Includes the following steps: S1: The control module detects the operating status of the sterilization process module. When it is in cooling mode, step S2 is executed; when it is in heating mode, step S6 is executed. S2: The cooling water in the cold water tank is transferred to the waste heat recovery water tank after passing through the second cold plate heat exchanger via the waste heat recovery module. S3: Monitor the temperature of the waste heat recovery water tank in real time. If the temperature is higher than the set threshold, proceed to step S4; if the temperature is not higher than the set threshold, proceed to step S5. S4: Connect the inlet of the heat exchange channel of the condenser evaporator to the waste heat recovery water tank through an electric three-way valve, and connect the outlet to the waste heat recovery water tank or cold water tank through an electric three-way valve. Start the secondary compressor and run the heat pump unit in single-stage compression mode to directly compress the heat energy of the waste heat recovery water tank and convert it into high-grade heat energy stored in the hot water tank. S5: Connect the inlet of the heat exchange channel of the evaporator to the waste heat recovery water tank through an electric three-way valve, and connect the outlet to the waste heat recovery water tank or cold water tank through an electric three-way valve. Start the first-stage compressor and the second-stage compressor, and operate the heat pump unit in a cascade operation mode to compress the heat energy of the waste heat recovery water tank through two stages and convert it into high-grade heat energy for storage in the hot water tank. S6: The hot water in the hot water tank is transferred to the heating and recovery water tank through the second heat exchange plate via the high-temperature heating module.

7. The control method for the integrated energy management system for pharmaceutical processes according to claim 6, characterized in that, Before executing step S3, the control module detects whether it is currently in a low-price electricity period. If so, step S3 is executed; otherwise, the control module monitors the cooling water level in real time. When the water level reaches the minimum level, step S3 is executed.

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