Waste heat recovery application system suitable for steam exhaust and control method

Abstract

The invention 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.The waste heat recovery application system comprises an integrated heat recovery device used for recovering waste heat from steam exhaust; the integrated recovered heat application device is used for recycling the recovered waste heat, and the integrated recovered heat application device is connected with the integrated heat recovery device through a pipeline; and the automatic controller is arranged in the integrated recovery heat application device. According to the waste heat recovery application system suitable for steam exhaust and the control method, heat recovery and recovered heat application are organically combined and integrated, steam exhaust waste heat is effectively recovered, high-quality steam and low-temperature hot water can be provided for supplementing production requirements, and the provided steam is stable in temperature and pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery, and in particular to a waste heat recovery application system and a control method suitable for steam exhaust. Background Art

[0003] Food, pre-prepared food, central kitchen, pharmaceutical, chemical and other industries will generate a large amount of low-grade steam and excess steam during the production process. Due to the lack of a heat recovery system suitable for the industry scene characteristics, these steam are collected by the exhaust system and then directly discharged into the atmosphere, which not only wastes energy, but also produces "white smoke" phenomenon and pollutes the environment. At the same time, these industries need to supplement hot water and high-grade steam during the production process.

[0004] From the overall technical level of waste heat recovery in the industrial field, at present, waste heat recovery technology is mainly focused on the recovery and utilization of waste heat from high-temperature bulk materials and liquid slag, waste heat from dust-containing exhaust gas, and low-grade waste energy. The recovered heat is mainly used to provide domestic hot water, air conditioning and refrigeration, and heating. There are relatively few scenarios for supplementing the overall process production of the project, and there is a mismatch between recovery and application in time and space. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention proposes a waste heat recovery application system and a control method suitable for steam exhaust, which are used to solve the above technical problems.

[0006] In a first aspect, a waste heat recovery application system suitable for steam exhaust is provided, comprising:

[0007] Integrated heat recovery device to recover waste heat from steam exhaust air;

[0008] An integrated heat recovery application device, used for reusing the recovered waste heat, the integrated heat recovery application device being connected to the integrated heat recovery device via a pipeline;

[0009] An automatic controller is arranged in the integrated heat recovery application device.

[0010] Further, the integrated heat recovery device includes an integrated heat recovery device box, an inlet device, a filter, a gas-liquid heat exchanger, a water baffle, a fan, an outlet device and a water collection tray;

[0011] The filter, gas-liquid heat exchanger, water baffle, and fan are all installed in 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 collecting pan is located under the bottom side of the gas-liquid heat exchanger and the water baffle, and the water collecting pan is installed on the inner side of the integrated heat recovery device box, a condensate discharge outlet is provided at the bottom of the side of the integrated heat recovery device box, and the condensate discharge outlet is connected to the drainage interface at the bottom of the water collecting pan through a pipeline, 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 the integrated heat recovery device circulating medium inlet and the integrated heat recovery device circulating medium outlet are both connected to the gas-liquid heat exchanger through a medium circulation pipeline.

[0012] Furthermore, the integrated heat recovery application device comprises:

[0013] Medium circulation system, used to transfer the waste heat recovered by the integrated heat recovery device to other systems through pipelines;

[0014] Water source heat pump steam generation system, using recovered waste heat to generate steam through water source heat pump technology;

[0015] Low-temperature hot water supply system, using recovered waste heat to provide hot water supply;

[0016] Soft water replenishment system is used to replenish and purify the water source within the system.

[0017] Furthermore, the medium circulation system comprises:

[0018] The integrated heat recovery application device circulating medium inlet is used to receive the heated circulating medium from the integrated heat recovery device;

[0019] A first electric valve is arranged on a medium circulation path;

[0020] A second electric valve is arranged on another medium circulation path;

[0021] The first water pump provides power for the medium circulation and drives the medium circulation to circulate in the system;

[0022] 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;

[0023] Temperature sensor, used to monitor the temperature of the circulating medium in real time;

[0024] Constant pressure water supply source interface, used to connect to an external water source;

[0025] Constant pressure water supply device, used to maintain the pressure stability of the medium circulation system;

[0026] The components are connected as a whole through medium circulation pipes to form a closed-loop medium circulation system.

[0027] Furthermore, the water source heat pump steam generation system includes a condensing heat steam generator, an evaporator and an external steam supply interface;

[0028] A refrigerant inlet and a refrigerant outlet are provided on one side of the condensing heat steam generator, and both the refrigerant inlet and the refrigerant outlet are connected to the evaporator through a refrigerant circulation pipe, and a heat pump compressor is provided on the refrigerant circulation pipe between the refrigerant inlet and the evaporator. One end of the condensing heat steam generator is connected to the external steam supply interface through the refrigerant circulation pipe, and a steam compressor is provided on the refrigerant circulation pipe between the condensing heat steam generator and the external steam supply interface.

[0029] Furthermore, the condensing hot steam generator includes a generator shell, a heat exchange tube bundle, a liquid level sensor, a second temperature sensor and a pressure sensor;

[0030] The liquid level sensor is arranged on one side of the generator shell, the second temperature sensor and the pressure sensor are both arranged on the generator shell, the heat exchange tube bundle is arranged in the generator shell, the refrigerant inlet and the refrigerant outlet are arranged on the other side of the generator shell, and the generator shell is provided with a water replenishment interface on one side of the refrigerant inlet, the refrigerant inlet and the refrigerant outlet are both connected to the heat exchange tube bundle, a steam outlet is provided at one end of the generator shell, and a drain port is provided at the other end, and a support leg is provided at the bottom end of the generator shell.

[0031] Further, 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;

[0032] The first plate heat exchanger is connected to the normal temperature water interface and the low temperature hot water supply interface through water pipes, and a third electric valve is arranged on the water pipe between the first plate heat exchanger and the normal temperature hot water interface.

[0033] Further, the soft water replenishment system includes a soft water inlet, a second plate heat exchanger and a second water pump;

[0034] The second plate heat exchanger is connected to the soft water inlet and the second water pump through water pipes respectively.

[0035] In a second aspect, a control method for a waste heat recovery application system suitable for steam exhaust is provided, based on a waste heat recovery application system suitable for steam exhaust as described in any one of the above, comprising the following steps:

[0036] The integrated heat recovery application device is provided with four operating conditions, namely, preheating condition, steam condition, hot water condition, and shutdown condition. When the production process needs to start the fan collection process of the integrated heat recovery device to produce low-grade steam and surplus steam, the first water pump is started by interlocking, and the first water pump motor runs at 50HZ, and the first electric valve and the second electric valve are maintained in the closed state, and the integrated heat recovery device recovers waste steam and waste heat, and the integrated heat recovery application device enters the preheating condition;

[0037] When the temperature data monitored by the first temperature sensor is ≥65°C, the first electric valve and the heat pump compressor are turned on; when the data monitored by the second temperature sensor and the 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 working state;

[0038] When the steam content in the exhaust system decreases due to a decrease in process production, and the temperature monitored by the first temperature sensor is ≥55°C and <65°C, the first electric valve, the heat pump compressor, and the steam compressor are closed, the operating frequency of the first water pump motor is adjusted to 30HZ, the second electric valve and the third electric valve are opened, hot water is supplied to the outside, and the integrated heat recovery application device enters the hot water working state;

[0039] When the process production is further reduced and the steam contained in the exhaust system continues to decrease, the temperature monitored by the first temperature sensor is less than 55°C and lasts for more than the set time, the first water pump, the second electric valve, and the third electric valve are closed, and the integrated heat recovery application device enters a shutdown state.

[0040] The invention adopting the above technical solution has the following advantages:

[0041] 1. The present invention is based on the production characteristics of food, pre-prepared dishes, central kitchens, pharmaceuticals, chemical industries, etc., and organically combines and integrates heat recovery and recovered heat application. It not only effectively recovers the waste heat of steam exhaust, but also provides high-quality steam and low-temperature hot water to supplement production needs. The steam temperature and pressure provided are stable.

[0042] 2. The present invention can automatically replenish water and automatically switch working conditions according to the residual heat of steam exhaust. It has a high level of automation and simple and convenient operation and management.

[0043] 3. The automatic controller of the present invention is arranged 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 a pipeline. The integrated heat recovery application device can be installed near the integrated heat recovery device or in a centralized equipment room of the project. An exhaust fan is provided in the integrated heat recovery device, and the steam exhaust system does not need to be equipped with an additional fan, and has strong engineering adaptability.

[0044] 4. The filter of the present invention is a nylon mesh filter that can be replaced by pulling out from the side, 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 top, which is easy to clean and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0046] Figure 1 This is a structural schematic diagram of a waste heat recovery application system suitable for steam exhaust according to the present invention;

[0047] Figure 2 It is a structural schematic diagram of a re-condensing hot steam generator of a waste heat recovery application system suitable for steam exhaust according to the present invention;

[0048] Reference numerals:

[0049] Inlet device 1-1, filter 1-2, gas-liquid heat exchanger 1-3, water baffle 1-4, fan 1-5, outlet device 1-6, water collecting 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 outlet 1-11,

[0050] 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 source interface 2-7, constant pressure water supply device 2-8,

[0051] Heat pump compressor 3-1, condensing heat steam generator 3-2, expansion valve 3-3, evaporator 3-4, steam compressor 3-5, external steam supply interface 3-6,

[0052] Normal temperature water interface 4-1, first plate heat exchanger 4-2, third electric valve 4-3, low temperature hot water supply interface 4-4,

[0053] Soft water inlet 5-1, second plate heat exchanger 5-2, second water pump 5-3,

[0054] Automatic controller 6,

[0055] Generator shell a, heat exchange tube bundle b, liquid level sensor c, second temperature sensor d, pressure sensor e, generator steam outlet f, refrigerant inlet g, refrigerant outlet h, water supply interface i, drain port j, and support leg k. DETAILED DESCRIPTION

[0056] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0057] like Figure 1-2 As shown, a waste heat recovery application system suitable for steam exhaust of the present invention comprises:

[0058] Integrated heat recovery device to recover waste heat from steam exhaust air;

[0059] The integrated heat recovery application device is used to reuse the recovered waste heat, and the integrated heat recovery application device is connected to the integrated heat recovery device through a pipeline;

[0060] The automatic controller 6 is arranged in the integrated heat recovery application device.

[0061] Specifically, the integrated heat recovery device is installed in the exhaust duct of the steam exhaust system, and the integrated heat recovery application device can be installed near the integrated heat recovery device or in the centralized equipment room of the project for easy management.

[0062] 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 water baffle 1-4, a fan 1-5, an outlet device 1-6 and a water collection tray 1-7;

[0063] The filter 1-2, the gas-liquid heat exchanger 1-3, the water baffle 1-4 and the fan 1-5 are all fixed in the integrated heat recovery device box by bolt connection, the inlet device 1-1 and the outlet device 1-6 are welded to the two ends of the integrated heat recovery device box, the water collecting pan 1-7 is located under the bottom side of the gas-liquid heat exchanger 1-3 and the water baffle 1-4, and the water collecting pan 1-7 is fixed to the inner side of the integrated heat recovery device box by screws, a condensate discharge port 1-11 is provided at the bottom of the side of the integrated heat recovery device box, and the condensate discharge port 1-11 is connected to the drainage interface at the bottom of the water collecting pan 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 the integrated heat recovery device circulating medium inlet 1-9 and the integrated heat recovery device circulating medium outlet 1-10 are both connected to the gas-liquid heat exchanger 1-3 through a medium circulation pipeline.

[0064] Specifically, the filter 1-2 is a side-pull-out replaceable filter made of nylon mesh; the gas-liquid heat exchanger 1-3 is a stainless steel finned heat exchanger; the water baffle 1-4 is a PVC corrugated water baffle 1-4 with a width of 300mm; the inlet device 1-1 and the outlet device 1-6 are both round or square or reducer pipe sections, and the interface size can be adjusted according to the size of the exhaust system air duct.

[0065] In some embodiments, the integrated heat recovery application device comprises:

[0066] Medium circulation system, used to transfer the waste heat recovered by the integrated heat recovery device to other systems through pipelines;

[0067] Water source heat pump steam generation system, using recovered waste heat to generate steam through water source heat pump technology;

[0068] Low-temperature hot water supply system, using recovered waste heat to provide hot water supply;

[0069] Soft water replenishment system is used to replenish and purify the water source within the system.

[0070] In some embodiments, the medium circulation system includes:

[0071] The integrated heat recovery application device circulating medium inlet 2-1 is used to receive the heated circulating medium from the integrated heat recovery device;

[0072] The first electric valve 2-2 is arranged on the medium circulation path;

[0073] The second electric valve 2-3 is arranged on another medium circulation path;

[0074] The first water pump 2-4 provides power for the medium circulation and drives the medium circulation to circulate in the system;

[0075] The integrated heat recovery and utilization device circulating medium outlet 2-5 is used to return the circulating medium after heat utilization to the integrated heat recovery device;

[0076] The first temperature sensor 2-6 is used to monitor the temperature of the circulating medium in real time;

[0077] Constant pressure water supply interface 2-7, used to connect to an external water source;

[0078] The constant pressure water supply device 2-8 is used to maintain the pressure stability of the medium circulation system;

[0079] The components are connected as a whole through medium circulation pipes to form a closed-loop medium circulation system.

[0080] 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, and the water source heat pump steam generation system also includes an expansion valve 3-3;

[0081] A refrigerant inlet g and a refrigerant outlet h are provided on one side of the condensing heat steam generator 3-2, and 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 provided on the refrigerant circulation pipe between the refrigerant inlet g and the evaporator 3-4, one end of the condensing heat steam generator 3-2 is connected to an external steam supply interface 3-6 through the refrigerant circulation pipe, and a steam compressor 3-5 is provided on the refrigerant circulation pipe between the condensing heat steam generator 3-2 and the external steam supply interface 3-6.

[0082] Specifically, the heat pump compressor 3-1, the condensing heat steam generator 3-2, the expansion valve 3-3, and the evaporator 3-4 are connected as a whole through the refrigerant circulation pipeline in sequence to form a refrigeration circulation loop. The condensing heat steam generator 3-2, the steam compressor 3-5, and the external steam supply interface 3-6 are connected as a whole through the steam pipeline in sequence.

[0083] In some embodiments, the condensing hot steam generator 3-2 includes a generator shell a, a heat exchange tube bundle b, a liquid level sensor c, a second temperature sensor d and a pressure sensor e;

[0084] The liquid level sensor c is arranged on the right side of the generator shell a, and the number is two. The second temperature sensor d and the pressure sensor e are both arranged on the generator shell a. The heat exchange tube bundle b is arranged in the generator shell a. The refrigerant inlet g and the refrigerant outlet h are arranged on the left side of the generator shell a. The generator shell a is provided with a water supply interface i on the side of the refrigerant inlet g. The refrigerant inlet g and the refrigerant outlet h are both connected with the heat exchange tube bundle b. A steam outlet is opened at the top of the generator shell a, and a drain port j is opened at the bottom of the generator shell a. A support leg k is arranged at the bottom of the generator shell a.

[0085] Specifically, the heat exchange tube bundle b is made of stainless steel, stainless steel fins are arranged 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, the 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).

[0086] When the liquid level measured by the liquid 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 replenished to the condensing hot steam generator 3-2 through the water replenishment interface i; when the liquid level measured by the liquid level sensor c reaches the upper limit, the second water pump 5-3 is turned off, and the replenishment of soft water to the condensing hot steam generator 3-2 is stopped.

[0087] 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;

[0088] The first plate heat exchanger 4-2 is connected to the normal temperature water interface 4-1 and the low temperature hot water supply interface 4-4 through water pipes, and a third electric valve 4-3 is arranged on the water pipe between the first plate heat exchanger 4-2 and the normal temperature water interface 4-1.

[0089] 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;

[0090] The second plate heat exchanger 5-2 is connected to the soft water inlet 5-1 and the second water pump 5-3 through water pipes.

[0091] Specifically, the evaporation temperature of the evaporator 3-4 is 55° C., and the condensation temperature of the condensing hot steam generator 3-2 is 105° C. 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 switch type electric valves.

[0092] In other embodiments, a control method for a waste heat recovery application system for steam exhaust is provided. A waste heat recovery application system for steam exhaust based on any one of the above items comprises the following steps:

[0093] The integrated heat recovery application device is set with four operating conditions: preheating condition, steam condition, hot water condition, and shutdown condition. When the production process needs to start the fan 1-5 of the integrated heat recovery device to collect low-grade steam and surplus steam produced by the process, the first water pump 2-4 is started by interlocking, and 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 the integrated heat recovery application device enters the preheating condition;

[0094] When the temperature data monitored by the first temperature sensor 2-6 is ≥65°C, 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 working state.

[0095] When the steam content in the exhaust system decreases due to the reduction of process production, and the temperature monitored by the first temperature sensor 2-6 is ≥55°C and <65°C, the first electric valve 2-2, the heat pump compressor 3-1, and the 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 working condition;

[0096] When the process production is further reduced and the steam contained in the exhaust system continues to decrease, the temperature monitored by the first temperature sensor 2-6 is less than 55°C and lasts for more than the set time, the first water pump 2-4, the second electric valve 2-3, and the third electric valve 4-3 are closed, and the integrated heat recovery application device enters the shutdown state.

[0097] The method of use of the present invention is as follows:

[0098] When the integrated heat recovery device is in operation, steam exhaust enters from the inlet device 1-1, flows through the filter 1-2, is cooled by the gas-liquid heat exchanger 1-3 and generates condensed water, and then passes through the water baffle 1-4 and the fan 1-5 in sequence, and finally is discharged from the outlet device 1-6. The condensed water generated by the steam exhaust flows into the water collecting pan 1-7 and is discharged from the condensed water outlet 1-11 through the connecting pipe.

[0099] 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 circulating medium enters the integrated heat recovery application device through the integrated heat recovery device circulating medium outlet 1-10 and the integrated heat recovery application device circulating medium inlet 2-1. According to the temperature, the heat is utilized at the evaporator 3-4 or the first plate heat exchanger 4-2. After the circulating medium cools down, it flows back to the integrated heat recovery device through the integrated heat recovery application device circulating medium outlet 2-5 and the integrated heat recovery device circulating medium inlet 1-9, continues to be heated at the gas-liquid heat exchanger 1-3, and enters the next cycle. The constant pressure water replenishment device 2-8 replenishes water and maintains pressure for the medium circulation system, and the water source is connected through the constant pressure water replenishment water source interface 2-7.

[0100] The refrigerant of the water source heat pump steam generation system can be R245fa, R32 or other refrigerants suitable for the evaporation temperature and condensation temperature of the present invention.

[0101] When the integrated heat recovery application device is in steam operation, the refrigerant absorbs the heat of the circulating medium and evaporates in the evaporator 3-4, and is then adiabatically compressed into high-temperature and high-pressure steam by the heat pump compressor 3-1, and enters the heat exchange tube bundle b of the condensing hot steam generator 3-2 through the refrigerant inlet g to be cooled into a high-temperature and high-pressure liquid, and after being throttled and reduced in pressure by the expansion valve 3-3, flows into the evaporator 3-4 to continue absorbing the heat of the circulating medium and evaporating.

[0102] The soft water in the condensing hot steam generator 3-2 is heated by the high-temperature and high-pressure refrigerant steam through the heat exchange tube bundle b to become a gas-liquid mixture. The soft water vapor gathers in the upper space of the generator shell a. When the soft water vapor data monitored by the second temperature sensor d and the pressure sensor e reaches 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 pipeline of the project.

[0103] When the integrated heat recovery application device is in hot water operation, external normal temperature water flows into the first plate heat exchanger 4-2 through the normal temperature water interface 4-1 and is heated, and then flows out through the low temperature hot water supply interface 4-4 to be connected to the project hot water tank or used to replenish water for other types of steam generators in the project.

[0104] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and should all be included in the scope of the claims and specification of the present invention.

Claims

1. A waste heat recovery application system suitable for steam exhaust, characterized in that: include: Integrated heat recovery device to recover waste heat from steam exhaust air; An integrated heat recovery application device, used for reusing the recovered waste heat, the integrated heat recovery application device being connected to the integrated heat recovery device via a pipeline; An automatic controller is arranged in the integrated heat recovery application device.

2. A waste heat recovery application system suitable for steam exhaust according to claim 1, characterized in that: The integrated heat recovery device comprises an integrated heat recovery device box, an inlet device, a filter, a gas-liquid heat exchanger, a water baffle, a fan, an outlet device and a water collection tray; The filter, gas-liquid heat exchanger, water baffle, and fan are all installed in 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 collecting pan is located under the bottom side of the gas-liquid heat exchanger and the water baffle, and the water collecting pan is installed on the inner side of the integrated heat recovery device box, a condensate discharge outlet is provided at the bottom of the side of the integrated heat recovery device box, and the condensate discharge outlet is connected to the drainage interface at the bottom of the water collecting pan through a pipeline, 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 the integrated heat recovery device circulating medium inlet and the integrated heat recovery device circulating medium outlet are both connected to the gas-liquid heat exchanger through a medium circulation pipeline.

3. The waste heat recovery application system suitable for steam exhaust according to claim 1, characterized in that: The integrated heat recovery application device comprises: Medium circulation system, used to transfer the waste heat recovered by the integrated heat recovery device to other systems through pipelines; Water source heat pump steam generation system, using recovered waste heat to generate steam through water source heat pump technology; Low-temperature hot water supply system, using recovered waste heat to provide hot water supply; Soft water replenishment system is used to replenish and purify the water source within the system.

4. A waste heat recovery application system suitable for steam exhaust according to claim 3, characterized in that: The medium circulation system comprises: The integrated heat recovery application device circulating medium inlet is used to receive the heated circulating medium from the integrated heat recovery device; A first electric valve is arranged on a medium circulation path; A second electric valve is arranged on another medium circulation path; The first water pump provides power for the medium circulation and drives the medium circulation 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; Temperature sensor, used to monitor the temperature of the circulating medium in real time; Constant pressure water supply source interface, used to connect to an external water source; Constant pressure water supply device, used to maintain the pressure stability of the medium circulation system; The components are connected as a whole through medium circulation pipes to form a closed-loop medium circulation system.

5. A waste heat recovery application system suitable for steam exhaust according to claim 4, characterized in that: The water source heat pump steam generation system includes a condensing heat steam generator, an evaporator and an external steam supply interface; A refrigerant inlet and a refrigerant outlet are provided on one side of the condensing heat steam generator, and both the refrigerant inlet and the refrigerant outlet are connected to the evaporator through a refrigerant circulation pipe, and a heat pump compressor is provided on the refrigerant circulation pipe between the refrigerant inlet and the evaporator. One end of the condensing heat steam generator is connected to the external steam supply interface through the refrigerant circulation pipe, and a steam compressor is provided on the refrigerant circulation pipe between the condensing heat steam generator and the external steam supply interface.

6. A waste heat recovery application system suitable for steam exhaust according to claim 5, characterized in that: The condensing hot steam generator includes a generator shell, a heat exchange tube bundle, a liquid level sensor, a second temperature sensor and a pressure sensor; The liquid level sensor is arranged on one side of the generator shell, the second temperature sensor and the pressure sensor are both arranged on the generator shell, the heat exchange tube bundle is arranged in the generator shell, the refrigerant inlet and the refrigerant outlet are arranged on the other side of the generator shell, and the generator shell is provided with a water replenishment interface on one side of the refrigerant inlet, the refrigerant inlet and the refrigerant outlet are both connected to the heat exchange tube bundle, a steam outlet is provided at one end of the generator shell, and a drain port is provided at the other end, and a support leg is provided at the bottom end of the generator shell.

7. The waste heat recovery application system suitable for steam exhaust according to claim 5, characterized in that: 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; The first plate heat exchanger is connected to the normal temperature water interface and the low temperature hot water supply interface through water pipes, and a third electric valve is arranged on the water pipe between the first plate heat exchanger and the normal temperature hot water interface.

8. The waste heat recovery application system suitable for steam exhaust according to claim 7, characterized in that: The soft water replenishment 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 through water pipes respectively.

9. A control method for a waste heat recovery application system for steam exhaust, characterized in that: A waste heat recovery application system suitable for steam exhaust according to any one of claims 1 to 8, comprising the following steps: The integrated heat recovery application device is provided with four operating conditions, namely, preheating condition, steam condition, hot water condition, and shutdown condition. When the production process needs to start the fan collection process of the integrated heat recovery device to produce low-grade steam and surplus steam, the first water pump is started by interlocking, and the first water pump motor runs at 50HZ, and the first electric valve and the second electric valve are maintained in the closed state, and the integrated heat recovery device recovers waste steam and waste heat, and the integrated heat recovery application device enters the preheating condition; When the temperature data monitored by the first temperature sensor is ≥65°C, the first electric valve and the heat pump compressor are turned on; when the data monitored by the second temperature sensor and the 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 working state; When the steam content in the exhaust system decreases due to a decrease in process production, and the temperature monitored by the first temperature sensor is ≥55°C and <65°C, the first electric valve, the heat pump compressor, and the steam compressor are closed, the operating frequency of the first water pump motor is adjusted to 30HZ, the second electric valve and the third electric valve are opened, hot water is supplied to the outside, and the integrated heat recovery application device enters the hot water working state; When the process production is further reduced and the steam contained in the exhaust system continues to decrease, the temperature monitored by the first temperature sensor is less than 55°C and lasts for more than the set time, the first water pump, the second electric valve, and the third electric valve are closed, and the integrated heat recovery application device enters a shutdown state.

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