A waste heat recovery application system and control method suitable for steam exhaust

Abstract

The application relates to the technical field of waste heat recovery, and discloses a waste heat recovery application system suitable for steam exhaust and a control method, which comprises an integrated heat recovery device used for recovering waste heat from steam exhaust; an integrated recovered heat application device used for recycling the recovered waste heat; the integrated recovered heat application device is connected with the integrated heat recovery device through pipelines; and an automatic controller arranged in the integrated recovered heat application device. The waste heat recovery application system suitable for steam exhaust and the control method organically combine and integrate heat recovery and recovered heat application, effectively recover waste heat from steam exhaust, provide high-quality steam and low-temperature hot water to supplement production requirements, and the provided steam temperature and pressure are stable.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery technology, specifically to a waste heat recovery application system and control method suitable for steam exhaust. Background Technology

[0002] Industries such as food processing, pre-prepared meals, central kitchens, pharmaceuticals, and chemicals generate large amounts of low-grade steam and residual steam during production. Due to a lack of heat recovery systems suitable for these industries, this steam is collected by exhaust systems and directly released into the atmosphere, wasting energy and producing "white smoke" that pollutes the environment. Meanwhile, these industries require additional hot water and high-grade steam during production.

[0003] From the perspective of overall technology for waste heat recovery in the industrial sector, current waste heat recovery technologies mainly focus on the recovery and utilization of waste heat from high-temperature bulk materials and liquid slag, waste heat from dusty exhaust gases, and low-grade waste energy. The recovered heat is mainly used to provide domestic hot water, air conditioning, and heating. There are relatively few scenarios where it is used to supplement the overall process production of a project, and there is a mismatch between recovery and application in terms of time and space. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a waste heat recovery application system and control method suitable for steam exhaust, in order to solve the aforementioned technical problems.

[0005] Firstly, a waste heat recovery application system suitable for steam exhaust is provided, including:

[0006] An integrated heat recovery unit is used to recover waste heat from steam exhaust.

[0007] An integrated heat recovery application device is used to reuse the recovered waste heat. The integrated heat recovery application device is connected to the integrated heat recovery device through pipelines.

[0008] An automatic controller is installed within the integrated heat recovery application device.

[0009] Furthermore, the integrated heat recovery device includes an integrated heat recovery device box, an inlet device, a filter, a gas-liquid heat exchanger, a baffle plate, a fan, an outlet device, and a water collection tray;

[0010] The filter, gas-liquid heat exchanger, baffle plate, and fan are all installed inside the integrated heat recovery device box. The inlet device and the outlet device are installed at both ends of the integrated heat recovery device box. The water collection tray is located under the gas-liquid heat exchanger and the baffle plate, and is installed inside the integrated heat recovery device box. A condensate drain outlet is provided at the bottom side of the integrated heat recovery device box, and the condensate drain outlet is connected to the drain interface at the bottom of the water collection tray through a pipe. An inspection port is provided on the side of the integrated heat recovery device box. An integrated heat recovery device circulating medium inlet and an integrated heat recovery device circulating medium outlet are provided on the integrated heat recovery device box, and both the integrated heat recovery device circulating medium inlet and the integrated heat recovery device circulating medium outlet are connected to the gas-liquid heat exchanger through a medium circulation pipe.

[0011] Furthermore, the integrated heat recovery application device includes:

[0012] The medium circulation system is used to transfer the waste heat recovered by the integrated heat recovery unit to other systems through pipelines;

[0013] A water source heat pump steam generation system uses recovered waste heat to generate steam through water source heat pump technology;

[0014] Low-temperature hot water supply system, which uses recovered waste heat to provide hot water supply;

[0015] A soft water replenishment system is used to replenish and purify the water source within the system.

[0016] Furthermore, the media circulation system includes:

[0017] The circulation medium inlet of the integrated heat recovery application device is used to receive the heated circulation medium from the integrated heat recovery device.

[0018] The first electric valve is located on the medium circulation path;

[0019] The second electric valve is located on another media circulation path;

[0020] The first water pump provides power for the circulation of the medium, driving the medium to circulate in the system.

[0021] The circulating medium outlet of the integrated heat recovery application device is used to return the circulating medium after heat utilization to the integrated heat recovery device.

[0022] Temperature sensor used to monitor the temperature of the circulating medium in real time;

[0023] The constant pressure water supply interface is used to connect to an external water source;

[0024] A constant pressure water supply device is used to maintain the pressure stability of the medium circulation system;

[0025] The components are connected together by a medium circulation pipe to form a closed-loop medium circulation system.

[0026] Furthermore, the water source heat pump steam generation system includes a condensing heat steam generator, an evaporator, and an external steam supply interface;

[0027] The condensing hot steam generator has a refrigerant inlet and a refrigerant outlet on one side. Both the refrigerant inlet and the refrigerant outlet are connected to the evaporator through a refrigerant circulation pipe. A heat pump compressor is installed on the refrigerant circulation pipe between the refrigerant inlet and the evaporator. One end of the condensing hot steam generator is connected to the external steam supply interface through a refrigerant circulation pipe, and a steam compressor is installed on the refrigerant circulation pipe between the condensing hot steam generator and the external steam supply interface.

[0028] Furthermore, the condensing hot steam generator includes a generator housing, a heat exchange tube bundle, a liquid level sensor, a second temperature sensor, and a pressure sensor;

[0029] The liquid level sensor is located on one side of the generator housing. The second temperature sensor and pressure sensor are both located on the generator housing. The heat exchange tube bundle is located inside the generator housing. The refrigerant inlet and refrigerant outlet are located on the other side of the generator housing. A water supply interface is provided on the side of the generator housing located at the refrigerant inlet. Both the refrigerant inlet and refrigerant outlet are connected to the heat exchange tube bundle. A steam outlet is provided at one end of the generator housing, and a drain outlet is provided at the other end. Support legs are provided at the bottom of the generator housing.

[0030] Furthermore, the low-temperature hot water supply system includes a normal temperature water interface, a first plate heat exchanger, and a low-temperature hot water supply interface;

[0031] The first plate heat exchanger is connected to the ambient temperature water interface and the low temperature hot water supply interface via water pipes, and a third electric valve is installed on the water pipe between the first plate heat exchanger and the ambient temperature hot water interface.

[0032] Furthermore, the soft water replenishment system includes a soft water inlet, a second plate heat exchanger, and a second water pump;

[0033] The second plate heat exchanger is connected to the soft water inlet and the second water pump via water pipes.

[0034] Secondly, a control method for a waste heat recovery application system suitable for steam exhaust is provided, based on any one of the aforementioned waste heat recovery application systems for steam exhaust, comprising the following steps:

[0035] The integrated heat recovery application device is equipped with four operating modes: preheating mode, steam mode, hot water mode, and shutdown mode. When the production process requires the fan of the integrated heat recovery device to collect low-grade steam and residual steam, the first water pump is interlocked and started. The motor of the first water pump runs at 50HZ, and the first electric valve and the second electric valve are kept closed. The integrated heat recovery device recovers the waste heat of the waste steam and enters the preheating mode.

[0036] When the temperature data monitored by the first temperature sensor is ≥65℃, the first electric valve and heat pump compressor are turned on. When the data monitored by the second temperature sensor and pressure sensor reach the set parameters, the steam compressor is turned on to supply steam to the outside, and the integrated heat recovery application device enters the steam operation mode.

[0037] When the amount of steam in the exhaust system decreases due to reduced production, and the temperature monitored by the first temperature sensor is ≥55℃ and <65℃, the first electric valve, heat pump compressor, and steam compressor are shut off, the operating frequency of the first water pump motor is adjusted to 30HZ, the second electric valve and the third electric valve are opened, and hot water is supplied to the outside. The integrated heat recovery application device enters the hot water operation mode.

[0038] When production is further reduced and the steam in the exhaust system continues to decrease, if the temperature monitored by the first temperature sensor is less than 55°C and the duration exceeds the set time, then the first water pump, the second electric valve, and the third electric valve will be shut down, and the integrated heat recovery application device will enter the shutdown state.

[0039] The invention employing the above technical solution has the following advantages:

[0040] 1. This invention is based on the production characteristics of industries such as food, pre-cooked food, central kitchen, pharmaceutical, and chemical. It organically combines heat recovery and the application of recovered heat into one, which not only effectively recovers the waste heat of steam exhaust, but also provides high-quality steam and low-temperature hot water to supplement the production needs. The steam temperature and pressure provided are stable.

[0041] 2. This invention can automatically replenish water and automatically switch operating conditions according to the waste heat of steam exhaust. It has a high level of automation and is simple and convenient to operate and manage.

[0042] 3. The automatic controller of the present invention is set in the internal space of the integrated heat recovery application device. The integrated heat recovery device is connected to the integrated heat recovery application device through pipelines. The integrated heat recovery application device can be installed nearby or in the centralized equipment room of the project. The integrated heat recovery device is equipped with an exhaust fan, so the steam exhaust system does not need to be equipped with a separate fan, which makes it highly adaptable to engineering.

[0043] 4. The filter of this invention is a side-pull-out replaceable nylon mesh filter, the gas-liquid heat exchanger is a stainless steel finned heat exchanger, the heat exchange tube bundle of the condensing hot steam generator is made of stainless steel, and the top of the generator shell is a detachable hemispherical dome, which is convenient for cleaning and maintenance. Attached Figure Description

[0044] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0045] Figure 1 This is a schematic diagram of a waste heat recovery system for steam exhaust according to the present invention;

[0046] Figure 2 This is a schematic diagram of the recondensing hot steam generator, which is a waste heat recovery application system for steam exhaust according to the present invention.

[0047] Figure label:

[0048] Inlet device 1-1, Filter 1-2, Gas-liquid heat exchanger 1-3, Baffle plate 1-4, Fan 1-5, Outlet device 1-6, Water collection tray 1-7, Inspection port 1-8, Integrated heat recovery device circulating medium inlet 1-9, Integrated heat recovery device circulating medium outlet 1-10, Condensate drain outlet 1-11

[0049] Integrated heat recovery application device circulating medium inlet 2-1, first electric valve 2-2, second electric valve 2-3, first water pump 2-4, integrated heat recovery application device circulating medium outlet 2-5, first temperature sensor 2-6, constant pressure water supply interface 2-7, constant pressure water supply device 2-8

[0050] Heat pump compressor 3-1, condensing hot steam generator 3-2, expansion valve 3-3, evaporator 3-4, steam compressor 3-5, external steam supply interface 3-6

[0051] 4-1 (Normal temperature water inlet), 4-2 (First plate heat exchanger), 4-3 (Third electric valve), 4-4 (Low temperature hot water supply inlet)

[0052] Soft water inlet 5-1, second plate heat exchanger 5-2, second water pump 5-3

[0053] Automatic controller 6

[0054] a. Generator housing, b. Heat exchange tube bundle, c. Liquid level sensor, d. Second temperature sensor, e. Pressure sensor, f. Generator steam outlet, g. Refrigerant inlet, h. Refrigerant outlet, i. Water supply interface, j. Drain outlet, k. Support leg. Detailed Implementation

[0055] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0056] like Figures 1-2 As shown, the present invention provides a waste heat recovery system suitable for steam exhaust, comprising:

[0057] An integrated heat recovery unit is used to recover waste heat from steam exhaust.

[0058] An integrated heat recovery application device is used to reuse the recovered waste heat. The integrated heat recovery application device is connected to the integrated heat recovery device through pipelines.

[0059] Automatic controller 6 is installed within the integrated heat recovery application device.

[0060] Specifically, the integrated heat recovery device is installed in the exhaust duct of the steam exhaust system. The integrated heat recovery application device can be installed nearby or in the project's centralized equipment room for easy management.

[0061] In some embodiments, the integrated heat recovery device includes an integrated heat recovery device box, an inlet device 1-1, a filter 1-2, a gas-liquid heat exchanger 1-3, a baffle plate 1-4, a fan 1-5, an outlet device 1-6, and a water collection tray 1-7.

[0062] The filter 1-2, gas-liquid heat exchanger 1-3, baffle 1-4, and fan 1-5 are all bolted and fixed inside the integrated heat recovery device box. The inlet device 1-1 and outlet device 1-6 are welded to both ends of the integrated heat recovery device box. The water collection tray 1-7 is located under the bottom of the gas-liquid heat exchanger 1-3 and the baffle 1-4, and is fixed to the inside of the integrated heat recovery device box with screws. A condensate drain outlet 1-11 is provided on the bottom side of the integrated heat recovery device box, and the condensate drain outlet 1-11 is connected to the drain interface at the bottom of the water collection tray 1-7 through a pipe. An inspection port 1-8 is provided on the side of the integrated heat recovery device box. An integrated heat recovery device circulating medium inlet 1-9 and an integrated heat recovery device circulating medium outlet 1-10 are provided on the integrated heat recovery device box, and both the integrated heat recovery device circulating medium inlet 1-9 and the integrated heat recovery device circulating medium outlet 1-10 are connected to the gas-liquid heat exchanger 1-3 through a medium circulation pipe.

[0063] Specifically, filter 1-2 is a side-pull-out replaceable filter made of nylon mesh; gas-liquid heat exchanger 1-3 is a stainless steel finned heat exchanger; baffle 1-4 is a PVC corrugated baffle 1-4 with a width of 300mm; inlet device 1-1 and outlet device 1-6 are both round-and-square or variable-diameter pipe sections, and the interface size can be adjusted according to the size of the exhaust system duct.

[0064] In some embodiments, the integrated heat recovery application device includes:

[0065] The medium circulation system is used to transfer the waste heat recovered by the integrated heat recovery unit to other systems through pipelines;

[0066] A water source heat pump steam generation system uses recovered waste heat to generate steam through water source heat pump technology;

[0067] Low-temperature hot water supply system, which uses recovered waste heat to provide hot water supply;

[0068] A soft water replenishment system is used to replenish and purify the water source within the system.

[0069] In some embodiments, the media circulation system includes:

[0070] The circulating medium inlet 2-1 of the integrated heat recovery application device is used to receive the heated circulating medium from the integrated heat recovery device.

[0071] The first electric valve 2-2 is located on the medium circulation path;

[0072] The second electric valve 2-3 is located on another media circulation path;

[0073] The first water pump 2-4 provides power for the medium circulation, driving the medium to circulate in the system.

[0074] The circulating medium outlets 2-5 of the integrated heat recovery application device are used to return the circulating medium after heat utilization to the integrated heat recovery device.

[0075] The first temperature sensor 2-6 is used to monitor the temperature of the circulating medium in real time;

[0076] Constant pressure water supply interface 2-7 is used to connect to an external water source;

[0077] The constant pressure water supply device 2-8 is used to maintain the pressure stability of the medium circulation system;

[0078] The components are connected together by a medium circulation pipe to form a closed-loop medium circulation system.

[0079] In some embodiments, the water source heat pump steam generation system includes a condensing heat steam generator 3-2, an evaporator 3-4, and an external steam supply interface 3-6. The water source heat pump steam generation system also includes an expansion valve 3-3.

[0080] A refrigerant inlet g and a refrigerant outlet h are provided on one side of the condensing hot steam generator 3-2. Both the refrigerant inlet g and the refrigerant outlet h are connected to the evaporator 3-4 through a refrigerant circulation pipe. A heat pump compressor 3-1 is installed on the refrigerant circulation pipe between the refrigerant inlet g and the evaporator 3-4. One end of the condensing hot steam generator 3-2 is connected to the external steam supply interface 3-6 through a refrigerant circulation pipe, and a steam compressor 3-5 is installed on the refrigerant circulation pipe between the condensing hot steam generator 3-2 and the external steam supply interface 3-6.

[0081] Specifically, the heat pump compressor 3-1, the condensing hot steam generator 3-2, the expansion valve 3-3, and the evaporator 3-4 are connected in sequence through a refrigerant circulation pipeline to form a refrigeration cycle loop. The condensing hot steam generator 3-2, the steam compressor 3-5, and the external steam supply interface 3-6 are connected in sequence through a steam pipeline to form a single unit.

[0082] In some embodiments, the condensing hot steam generator 3-2 includes a generator housing a, a heat exchange tube bundle b, a liquid level sensor c, a second temperature sensor d, and a pressure sensor e;

[0083] Two level sensors (c) are located on the right side of the generator housing (a). The second temperature sensor (d) and pressure sensor (e) are both located on the generator housing (a). The heat exchange tube bundle (b) is located inside the generator housing (a). The refrigerant inlet (g) and refrigerant outlet (h) are located on the left side of the generator housing (a). A water supply interface (i) is located on the side of the generator housing (a) where the refrigerant inlet (g) is located. Both the refrigerant inlet (g) and the refrigerant outlet (h) are connected to the heat exchange tube bundle (b). A steam outlet is located at the top of the generator housing (a), and a drain outlet (j) is located at the bottom of the generator housing (a). A support leg (k) is located at the bottom of the generator housing (a).

[0084] Specifically, the heat exchange tube bundle b is made of stainless steel, and stainless steel fins are installed on the outside of the heat exchange tube bundle b. The second temperature sensor d monitors the steam temperature, and the pressure sensor e monitors the steam pressure. The condensing hot steam generator 3-2 is placed vertically. The heat pump circulating refrigerant flows in the heat exchange tube bundle b. Soft water and steam are in the generator shell a. The lower part of the generator shell a is cylindrical, and the top of the generator shell a is detachable and hemispherical (for easy disassembly and cleaning).

[0085] When the liquid level measured by the level sensor c reaches the lower limit, the second water pump 5-3 is turned on, and external soft water flows in through the soft water inlet 5-1. After being heated by the second plate heat exchanger 5-2, soft water is supplied to the condensing hot steam generator 3-2 through the water supply interface i. When the liquid level measured by the level sensor c reaches the upper limit, the second water pump 5-3 is turned off, and the supply of soft water to the condensing hot steam generator 3-2 is stopped.

[0086] In some embodiments, the low-temperature hot water supply system includes a normal temperature water interface 4-1, a first plate heat exchanger 4-2, and a low-temperature hot water supply interface 4-4;

[0087] The first plate heat exchanger 4-2 is connected to the ambient temperature water interface 4-1 and the low temperature hot water supply interface 4-4 respectively via water pipes, and a third electric valve 4-3 is installed on the water pipe between the first plate heat exchanger 4-2 and the ambient temperature water interface 4-1.

[0088] In some embodiments, the soft water replenishment system includes a soft water inlet 5-1, a second plate heat exchanger 5-2, and a second water pump 5-3;

[0089] The second plate heat exchanger 5-2 is connected to the soft water inlet 5-1 and the second water pump 5-3 via water pipes.

[0090] Specifically, the evaporator 3-4 has an evaporation temperature of 55℃, and the condensation temperature of the condensing hot steam generator 3-2 is 105℃. The first water pump 2-4 is a variable frequency water pump, the second water pump 5-3 is a fixed frequency water pump, and the first electric valve 2-2, the second electric valve 2-3, and the third electric valve 4-3 are all on / off type electric valves.

[0091] In other embodiments, a control method for a waste heat recovery application system suitable for steam exhaust is provided. A waste heat recovery application system suitable for steam exhaust, based on any of the preceding embodiments, includes the following steps:

[0092] The integrated heat recovery application device is set with four operating modes: preheating mode, steam mode, hot water mode, and shutdown mode. When the production process requires the fan 1-5 of the integrated heat recovery device to collect low-grade steam and residual steam produced by the process, the first water pump 2-4 is interlocked and started. The motor of the first water pump 2-4 runs at 50HZ, and the first electric valve 2-2 and the second electric valve 2-3 are kept closed. The integrated heat recovery device recovers the waste heat of the waste steam and enters the preheating mode.

[0093] When the temperature data monitored by the first temperature sensor 2-6 is ≥65℃, the first electric valve 2-2 and the heat pump compressor 3-1 are opened. When the data monitored by the second temperature sensor d and the pressure sensor e reach the set parameters, the steam compressor 3-5 is opened to supply steam to the outside, and the integrated heat recovery application device enters the steam operation mode.

[0094] When the amount of steam in the exhaust system decreases due to reduced production, and the temperature monitored by the first temperature sensor 2-6 is ≥55℃ and <65℃, the first electric valve 2-2, heat pump compressor 3-1, and steam compressor 3-5 are closed, the operating frequency of the first water pump 2-4 motor is adjusted to 30HZ, the second electric valve 2-3 and the third electric valve 4-3 are opened, hot water is supplied to the outside, and the integrated heat recovery application device enters the hot water operation mode.

[0095] When production is further reduced due to the process, the steam in the exhaust system continues to decrease, and the temperature monitored by the first temperature sensor 2-6 is less than 55°C and the duration exceeds the set time, then the first water pump 2-4, the second electric valve 2-3, and the third electric valve 4-3 are shut down, and the integrated heat recovery application device enters the shutdown state.

[0096] The method of using this invention is as follows:

[0097] When the integrated heat recovery unit is in operation, steam exhaust enters through inlet device 1-1, flows through filter 1-2, is cooled by gas-liquid heat exchanger 1-3 to produce condensate, and then passes through baffle plate 1-4 and fan 1-5 in sequence, finally being discharged from outlet device 1-6. The condensate produced by the steam exhaust flows into water collection pan 1-7 and is discharged from condensate outlet 1-11 through connecting pipe.

[0098] Driven by the first water pump 2-4, the circulating medium circulates in the pipeline. After being heated at the gas-liquid heat exchanger 1-3, the medium enters the integrated heat recovery application device through the circulating medium outlet 1-10 and the circulating medium inlet 2-1. Depending on the temperature, it is utilized for heat recovery at the evaporator 3-4 or the first plate heat exchanger 4-2. After cooling, the medium flows back to the integrated heat recovery device through the circulating medium outlet 2-5 and the circulating medium inlet 1-9, where it is reheated in the gas-liquid heat exchanger 1-3 and begins the next cycle. The constant pressure water supply device 2-8 replenishes water and maintains pressure in the medium circulation system, with the water source connected through the constant pressure water supply interface 2-7.

[0099] The refrigerant in the water source heat pump steam generation system can be R245fa, R32, or other refrigerants that are suitable for the evaporation and condensation temperatures of this invention.

[0100] When the integrated heat recovery application device is in steam mode, the refrigerant absorbs heat from the circulating medium and evaporates in the evaporator 3-4. Then, it is adiabatically compressed into high-temperature and high-pressure steam by the heat pump compressor 3-1. It enters the heat exchange tube bundle b of the condensing hot steam generator 3-2 through the refrigerant inlet g and is cooled into high-temperature and high-pressure liquid. After being throttled and depressurized by the expansion valve 3-3, it flows into the evaporator 3-4 to continue absorbing heat from the circulating medium and evaporating.

[0101] In the condensing hot steam generator 3-2, the soft water is heated by high-temperature and high-pressure refrigerant steam through the heat exchange tube bundle b to become a gas-liquid mixture. The soft water steam accumulates in the upper space of the generator shell a. When the soft water steam data monitored by the second temperature sensor d and pressure sensor e reach the set parameters, the steam compressor 3-5 is turned on for adiabatic pressurization and then supplies steam to the outside. The supplied steam can be connected to the overall steam supply system network of the project.

[0102] When the integrated heat recovery application device is in hot water operation, external ambient temperature water flows into the first plate heat exchanger 4-2 through the ambient temperature water interface 4-1, is heated, and then flows out through the low temperature hot water supply interface 4-4 to connect to the project's hot water tank or to make up for other types of steam generators in the project.

[0103] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A waste heat recovery system suitable for steam exhaust, characterized in that, include: An integrated heat recovery unit is used to recover waste heat from steam exhaust. An integrated heat recovery application device is used to reuse the recovered waste heat. The integrated heat recovery application device is connected to the integrated heat recovery device through pipelines. An automatic controller is installed within the integrated heat recovery application device; The integrated heat recovery application device includes: The medium circulation system is used to transfer the waste heat recovered by the integrated heat recovery unit to other systems through pipelines; A water source heat pump steam generation system uses recovered waste heat to generate steam through water source heat pump technology; Low-temperature hot water supply system, which uses recovered waste heat to provide hot water supply; A soft water replenishment system is used to replenish and purify the water source within the system. The medium circulation system includes: The circulation medium inlet of the integrated heat recovery application device is used to receive the heated circulation medium from the integrated heat recovery device. The first electric valve is located on the medium circulation path; The second electric valve is located on another media circulation path; The first water pump provides power for the circulation of the medium, driving the medium to circulate in the system. The circulating medium outlet of the integrated heat recovery application device is used to return the circulating medium after heat utilization to the integrated heat recovery device. The first temperature sensor is used to monitor the temperature of the circulating medium in real time; The constant pressure water supply interface is used to connect to an external water source; A constant pressure water supply device is used to maintain the pressure stability of the medium circulation system; The components are connected together by a medium circulation pipe to form a closed-loop medium circulation system; The water source heat pump steam generation system includes a condensing heat steam generator, an evaporator, and an external steam supply interface; The condensing hot steam generator has a refrigerant inlet and a refrigerant outlet on one side. Both the refrigerant inlet and the refrigerant outlet are connected to the evaporator through a refrigerant circulation pipe. A heat pump compressor is installed on the refrigerant circulation pipe between the refrigerant inlet and the evaporator. One end of the condensing hot steam generator is connected to the external steam supply interface through a refrigerant circulation pipe, and a steam compressor is installed on the refrigerant circulation pipe between the condensing hot steam generator and the external steam supply interface. The condensing hot steam generator includes a generator housing, a heat exchange tube bundle, a liquid level sensor, a second temperature sensor, and a pressure sensor. The low-temperature hot water supply system includes a normal temperature water interface, a first plate heat exchanger, and a low-temperature hot water supply interface. Furthermore, a third electric valve is installed on the water pipe between the first plate heat exchanger and the ambient temperature water interface; The control method for the above system includes the following steps: The integrated heat recovery application device is equipped with four operating modes: preheating mode, steam mode, hot water mode, and shutdown mode. When the production process requires the fan of the integrated heat recovery device to collect low-grade steam and residual steam, the first water pump is interlocked and started. The motor of the first water pump runs at 50HZ, and the first electric valve and the second electric valve are kept closed. The integrated heat recovery device recovers the waste heat of the waste steam and enters the preheating mode. When the temperature data monitored by the first temperature sensor is ≥65℃, the first electric valve and heat pump compressor are turned on. When the data monitored by the second temperature sensor and pressure sensor reach the set parameters, the steam compressor is turned on to supply steam to the outside, and the integrated heat recovery application device enters the steam operation mode. When the amount of steam in the exhaust system decreases due to reduced production, and the temperature monitored by the first temperature sensor is ≥55℃ and <65℃, the first electric valve, heat pump compressor, and steam compressor are shut off, the operating frequency of the first water pump motor is adjusted to 30HZ, the second electric valve and the third electric valve are opened, and hot water is supplied to the outside. The integrated heat recovery application device enters the hot water operation mode. When production is further reduced and the steam in the exhaust system continues to decrease, if the temperature monitored by the first temperature sensor is less than 55°C and the duration exceeds the set time, then the first water pump, the second electric valve, and the third electric valve will be shut down, and the integrated heat recovery application device will enter the shutdown state.

2. The waste heat recovery application system for steam exhaust according to claim 1, characterized in that, The integrated heat recovery device includes an integrated heat recovery device box, an inlet device, a filter, a gas-liquid heat exchanger, a baffle plate, a fan, an outlet device, and a water collection tray; The filter, gas-liquid heat exchanger, baffle plate, and fan are all installed inside the integrated heat recovery device box. The inlet device and the outlet device are installed at both ends of the integrated heat recovery device box. The water collection tray is located under the gas-liquid heat exchanger and the baffle plate, and is installed inside the integrated heat recovery device box. A condensate drain outlet is provided at the bottom side of the integrated heat recovery device box, and the condensate drain outlet is connected to the drain interface at the bottom of the water collection tray through a pipe. An inspection port is provided on the side of the integrated heat recovery device box. An integrated heat recovery device circulating medium inlet and an integrated heat recovery device circulating medium outlet are provided on the integrated heat recovery device box, and both the integrated heat recovery device circulating medium inlet and the integrated heat recovery device circulating medium outlet are connected to the gas-liquid heat exchanger through a medium circulation pipe.

3. The waste heat recovery application system for steam exhaust according to claim 1, characterized in that, The liquid level sensor is located on one side of the generator housing. The second temperature sensor and pressure sensor are both located on the generator housing. The heat exchange tube bundle is located inside the generator housing. The refrigerant inlet and refrigerant outlet are located on the other side of the generator housing. A water supply interface is provided on the side of the generator housing located at the refrigerant inlet. Both the refrigerant inlet and refrigerant outlet are connected to the heat exchange tube bundle. A steam outlet is provided at one end of the generator housing, and a drain outlet is provided at the other end. Support legs are provided at the bottom of the generator housing.

4. A waste heat recovery application system suitable for steam exhaust according to claim 1, characterized in that, The first plate heat exchanger is connected to the ambient temperature water interface and the low temperature hot water supply interface via water pipes.

5. A waste heat recovery system suitable for steam exhaust according to claim 4, characterized in that, The soft water supply system includes a soft water inlet, a second plate heat exchanger, and a second water pump. The second plate heat exchanger is connected to the soft water inlet and the second water pump via water pipes.

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