A device for recovering and utilizing waste heat from high-temperature exhaust gas in a cigarette factory

Abstract

This utility model relates to a waste heat recovery and utilization device for high-temperature exhaust gas from a cigarette factory, comprising the following components connected in sequence: an exhaust gas pretreatment device, including a first filter for filtering particulate matter from the exhaust gas; an ion exchange device, equipped with multi-stage ion exchangers and a first gas-liquid separator, for removing sodium ions and recovering heat energy; a multi-stage heat exchange device, including a direct contact spray heat exchanger and a shell-and-tube heat exchanger; a condensate recovery device for condensing water vapor; a waste heat utilization device, including a partitioned insulated water tank; and a control unit for dynamic adjustment via sensors and electronically controlled valves. This device maximizes the utilization of heat energy in the exhaust gas, reduces energy waste, and improves the energy efficiency of the device. The condensate recovery device condenses and recovers water vapor from the exhaust gas, allowing water resources to be recycled, reducing dependence on external water sources, and conserving water resources.

Description

Technical Field

[0001] This utility model relates to the field of tobacco factory waste gas treatment technology, specifically a device for recovering and utilizing waste heat from high-temperature waste gas in cigarette factories. Background Technology

[0002] In the tobacco industry, especially during the drying, heating, and other processes of tobacco leaves, a large amount of high-temperature waste gas is generated. This waste gas can reach temperatures exceeding 200°C, and contains certain chemical components, possessing significant thermal energy. However, most of this waste gas is not effectively collected and is directly emitted into the atmosphere. For a long time, this has not only led to enormous energy waste but also placed a burden on the environment.

[0003] Currently, most commercially available heat recovery technologies are only suitable for recovering waste gases with relatively stable temperatures and simple gas compositions. However, the characteristics of tobacco factory waste gases, such as large temperature fluctuations, high humidity, and complex composition, make existing recovery technologies inadequate. In particular, under high humidity conditions, water vapor condensation can affect heat exchange efficiency, and corrosive components in high-temperature waste gases can accelerate equipment aging and corrosion, shortening equipment lifespan. Furthermore, existing recovery technologies lack effective treatment for harmful components in the waste gases, potentially leading to secondary pollution.

[0004] Therefore, the utility model provides a waste heat recovery device for high-temperature exhaust gas from cigarette factories, which can effectively address the special characteristics of cigarette factory exhaust gas, improve the efficiency of exhaust gas heat recovery, and recover water vapor and sodium ions in the exhaust gas, thereby reducing energy consumption and environmental pollution, and meeting the dual needs of modern cigarette factories for energy conservation, environmental protection and economic benefits. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides an effective technical solution for removing sodium ions and recovering and utilizing water vapor in waste gas. This solution not only optimizes the waste gas treatment process and reduces sodium ion emissions, but also effectively recovers water vapor from the waste gas, converting it into a reusable resource. This improves the overall efficiency of the waste gas treatment device, reduces energy consumption and environmental pollution, and provides technical support for tobacco factories to achieve their goals of green environmental protection and energy conservation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for recovering and utilizing waste heat from high-temperature exhaust gas in a cigarette factory, comprising the following components connected in sequence: An exhaust gas pretreatment device includes a first filter for filtering particulate matter in the exhaust gas; An ion exchange device is configured with a multi-stage ion exchanger and a first gas-liquid separator for removing sodium ions and recovering heat energy. The multi-stage ion exchanger is configured in two stages, specifically including: a first-stage ion exchanger, which contains a first resin layer and a second resin layer; a first gas outlet at the top of the first-stage ion exchanger, which connects to the first gas-liquid separator; and a first liquid outlet at the bottom of the first-stage ion exchanger, which connects to the second-stage ion exchanger. The second-stage ion exchanger forms a circulation loop through a sodium ion concentration sensor and an electrically controlled valve. The liquid outlet of the first gas-liquid separator is connected to the second-stage ion exchanger, and the gas outlet is connected to the inlet of the first-stage ion exchanger via a sodium ion concentration sensor and a reflux valve assembly. Multi-stage heat exchange devices, including direct contact spray heat exchangers and shell-and-tube heat exchangers; Condensate recovery unit, used for condensing water vapor; The waste heat recovery device includes insulated water tanks with zoned water storage; the insulated water tanks include a medium-temperature water tank and a low-temperature water tank, separated by an insulation layer; the medium-temperature water tank is used to receive and store hot water generated by the ion exchange device and the heat exchange device to provide domestic water; the low-temperature water tank is used to receive and store condensate, which is cooled by the cooling chamber and then supplied to the cooling water tank, which supplies water to the shell-and-tube heat exchanger, forming a cycle; The control device achieves dynamic adjustment through sensors and electronically controlled valves.

[0007] As a preferred technical solution, the direct contact spray heat exchanger includes: three spray zones A, B, and C divided along the airflow direction, each spray zone is equipped with a concentration sensor; the direct contact spray heat exchanger is provided with a first layer of packing zone and a second layer of packing zone.

[0008] As a preferred technical solution, the upper part of the first and second packing zones of the direct contact spray heat exchanger is equipped with spray water pipes and nozzles, and the spray water pipes are equipped with flow control valve groups; the nozzles are connected to servo motors, and the angle of the nozzles can be adjusted by the servo motors.

[0009] As a preferred technical solution, a second gas outlet is provided at the top of the direct contact spray heat exchanger, which is connected to a second gas-liquid separator. The exhaust gas enters the shell-and-tube heat exchanger through the second gas-liquid separator.

[0010] As a preferred technical solution, the cooling water in the shell-and-tube heat exchanger is connected to the spray water pipe through the cooling water outlet via the second filter and the fourth one-way valve, and its hot water outlet is connected to the medium-temperature water tank of the insulated water tank for use as domestic water.

[0011] As a preferred technical solution, some of the waste gas in the shell-and-tube heat exchanger enters the condenser, is transported to the air cooler, and then discharged into the atmosphere.

[0012] As a preferred technical solution, the condensate recovery device includes a condenser. The water produced by the condenser flows out and passes through a temperature sensor. If the temperature is high, the sixth electrically controlled valve closes and the fifth electrically controlled valve opens, allowing the water to enter the medium-temperature water tank; if the temperature is low, the fifth electrically controlled valve closes and the sixth electrically controlled valve opens, allowing the water to enter the low-temperature water tank.

[0013] As a preferred technical solution, the control device includes: a sodium ion concentration sensor linked to an electrically controlled valve and a check valve to realize ion exchange circulation; a concentration sensor in the spray zone linked to a flow control valve group and a servo motor; and a temperature sensor controlling a condensate electrically controlled valve.

[0014] As a preferred technical solution, the sodium ion concentration sensor is a glass electrode type Na⁺ sensor.

[0015] As a preferred technical solution, the adjustment logic of the nozzle is as follows: when the concentration difference between adjacent areas is greater than 15%, the servo motor drives the nozzle to deflect 5°-30° towards the high concentration area; the spray flow rate increases with the increase of exhaust gas temperature, and the flow rate increases by 5%-8% for every 10° increase in temperature.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial effects: 1. High-efficiency heat recovery and utilization: The multi-stage heat exchange device, which combines direct contact spray heat exchanger and shell-and-tube heat exchanger, can efficiently recover heat from waste gas, maximize the utilization of heat energy in waste gas, reduce energy waste, and improve the energy utilization efficiency of the device.

[0017] 2. Water resource recycling: The condensate recovery device condenses and recovers water vapor in the waste gas, allowing water resources to be recycled, reducing dependence on external water sources and saving water resources.

[0018] 3. Intelligent control: Equipped with real-time monitoring and control devices, it can intelligently adjust the operating status of each device, optimize parameters such as exhaust gas flow and temperature, improve overall operating efficiency, and reduce energy consumption.

[0019] 4. Comprehensive utilization of waste heat: The recovered water is not only used for internal circulation within the plant, but can also provide domestic water for residents, making full use of waste heat resources and having high economic benefits and environmental value. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a high-temperature waste heat recovery and utilization device for cigarette factory exhaust gas, as proposed in an embodiment of this utility model.

[0021] Figure Descriptions: 1. First filter; 2. First-stage ion exchanger; 2-1 First resin layer; 2-2 Second resin layer; 2-3 First gas outlet; 2-4 First liquid outlet; 3. First gas-liquid separator; 4. First check valve; 5. First sodium ion concentration sensor; 6. First electrically controlled valve; 7. Second electrically controlled valve; 8. Second check valve; 9. Second-stage ion exchanger; 10. Second sodium ion concentration sensor; 11. Third electrically controlled valve; 12. ... 13. Third check valve; 14. Insulated water tank; 14-1. First inlet of medium-temperature water tank; 14-2. Medium-temperature water tank; 14-3. Second inlet of medium-temperature water tank; 14-4. Outlet of medium-temperature water tank; 14-5. Insulation layer; 14-6. Low-temperature water tank; 14-7. Inlet of low-temperature water tank; 14-8. Outlet of low-temperature water tank; 15. Direct contact spray heat exchanger; 15-1. Gas inlet; 15-2. Concentration sensor in zone A; 15 -3. First layer packing zone; 15-4. Second layer packing zone; 15-5. Sprayer head; 15-6. Flow control valve assembly; 15-7. Spray water pipe; 15-8. Second gas outlet; 15-9. Servo motor; 15-10. Concentration sensor in zone B; 15-11. Concentration sensor in zone C; 15-12. Second liquid outlet; 16. Second gas-liquid separator; 17. Shell-and-tube heat exchanger; 17-1. Hot water outlet; 17-2. Cooling water inlet. 17-3 Cooling water outlet; 18 Second filter; 19 Fourth check valve; 20 Condenser; 21 Air cooler; 22 Temperature sensor; 23 Fifth solenoid valve; 24 Sixth solenoid valve; 25 Cooling chamber; 26 Seventh solenoid valve; 27 Cooling water tank; 27-1 Cooling water tank inlet; 27-2 Cooling water outlet; 27-3 Makeup water inlet; 27-4 Level gauge; 28 Water pump; 29 Domestic water supply. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1 Please see Figure 1 This embodiment presents a high-temperature waste gas waste heat recovery and utilization device for cigarette factories, comprising the following components connected in sequence: The exhaust gas pretreatment device includes a first filter 1 for filtering exhaust gas particulate matter; An ion exchange device is configured with a multi-stage ion exchanger and a first gas-liquid separator 3 for removing sodium ions and recovering heat energy. The multi-stage ion exchanger is configured in two stages, specifically including: a first-stage ion exchanger 2, which contains a first resin layer 2-1 and a second resin layer 2-2; a first gas outlet 2-3 at the top of the first-stage ion exchanger 2, which is connected to the first gas-liquid separator 3; and a liquid outlet 2-4 at the bottom of the first-stage ion exchanger 2, which is connected to the second-stage ion exchanger 9. The second-stage ion exchanger 9 forms a circulation loop through a sodium ion concentration sensor and an electrically controlled valve. The liquid outlet of the first gas-liquid separator 3 is connected to the second-stage ion exchanger 9, and the gas outlet is connected to the inlet of the first-stage ion exchanger 2 via a sodium ion concentration sensor and a reflux valve assembly. A multi-stage heat exchange device, comprising a direct contact spray heat exchanger 15 and a shell-and-tube heat exchanger 17; Condensate recovery unit, used for condensing water vapor; The waste heat recovery device includes an insulated water tank 14 with partitioned water storage. The insulated water tank 14 includes a medium-temperature water tank 14-2 and a low-temperature water tank 14-6, which are separated by an insulation layer 14-5. The medium-temperature water tank 14-2 is used to receive and store hot water generated by the ion exchange device and the heat exchange device to provide domestic water. The low-temperature water tank 14-6 is used to receive and store condensate, which is cooled by the cooling chamber 25 and then supplied to the cooling water tank 27. The cooling water tank 27 supplies water to the shell-and-tube heat exchanger 17, forming a cycle. The control device achieves dynamic adjustment through sensors and electronically controlled valves.

[0024] Preferably, the direct contact spray heat exchanger 15 includes three spray zones A, B, and C divided along the airflow direction, each spray zone being equipped with a concentration sensor; the direct contact spray heat exchanger 15 is provided with a first layer of packing zone 15-3 and a second layer of packing zone 15-4.

[0025] Preferably, the direct contact spray heat exchanger 15 has a spray water pipe 15-7 and a nozzle 15-5 on the upper part of the first layer packing area 15-3 and the second layer packing area 15-4. A flow control valve group 15-6 is installed on the spray water pipe 15-7. The nozzle 15-5 is connected to a servo motor 15-9, and the angle of the nozzle 15-5 can be adjusted by the servo motor 15-9.

[0026] Preferably, the top of the direct contact spray heat exchanger 15 is provided with a second gas outlet 15-8, which is connected to a second gas-liquid separator 16, and the exhaust gas enters the shell-and-tube heat exchanger 17 through the second gas-liquid separator 16.

[0027] Preferably, the cooling water in the shell-and-tube heat exchanger 17 passes through the cooling water outlet 17-3, the second filter 18, and the fourth one-way valve 19 to connect to the spray water pipe 15-7, and its hot water outlet 17-1 is connected to the medium-temperature water tank 14-2 of the insulated water tank 14 for supplying domestic water 29.

[0028] Preferably, a portion of the exhaust gas in the shell-and-tube heat exchanger 17 enters the condenser 20 and is then transported to the air cooler 21 before being discharged into the atmosphere.

[0029] Preferably, the condensate recovery device includes a condenser 20. The water produced by the condenser 20 flows out and passes through a temperature sensor 22. If the temperature is high, the sixth solenoid valve 24 closes and the fifth solenoid valve 23 opens, and the water enters the medium-temperature water tank 14-2; if the temperature is low, the fifth solenoid valve 23 closes and the sixth solenoid valve 24 opens, and the water enters the low-temperature water tank 14-6.

[0030] Preferably, the control device includes: a sodium ion concentration sensor linked to an electrically controlled valve and a check valve to realize ion exchange circulation; a concentration sensor in the spray zone linked to a flow control valve group 15-6 and a servo motor 15-9; and a temperature sensor controlling a condensate electrically controlled valve.

[0031] Preferably, the sodium ion concentration sensor is a glass electrode type Na⁺ sensor.

[0032] Preferably, the triggering conditions for the ion exchange cycle are as follows: For sodium ion exchange, the first one-way valve 4 opens, and the waste gas passes through the first sodium ion concentration sensor 5 to detect its concentration. When the sodium ion concentration in the waste gas is ≤40ppm, the first electrically controlled valve 6 opens, and the waste gas enters the direct contact spray heat exchanger 15 through the first gas inlet 15-1. When the sodium ion concentration in the waste gas is >50ppm, the second electrically controlled valve 7 opens, and the waste gas returns to the primary ion exchanger 2 through the second one-way valve 8 to remove sodium ions. This cycle continues until the concentration reaches the standard, at which point the first electrically controlled valve 6 opens, and the waste gas enters the direct contact spray heat exchanger 15. The sodium ion concentration between 40ppm and 50ppm serves as a buffer zone to avoid frequent opening and closing of the electrically controlled valves, which could affect the quality.

[0033] Preferably, the adjustment logic of the nozzle 15-5 is as follows: when the concentration difference between adjacent areas is greater than 15%, the servo motor 15-9 drives the nozzle 15-5 to deflect towards the high concentration area by 5°-30°; the spray flow rate increases with the increase of exhaust gas temperature, and the flow rate increases by 5%-8% for every 10° increase in temperature.

[0034] The specific implementation process is as follows: High-temperature exhaust gas is filtered out of impurities such as flue gas in the first filter 1 and enters the first-stage ion exchanger 2 to absorb sodium ions in the exhaust gas. The resulting aqueous solution enters the second-stage ion exchanger 9 through the liquid outlet 2-4 of the ion exchanger. Meanwhile, the exhaust gas enters the first gas-liquid separator 3 through the ion exchanger outlet 2-3. The separated water enters the second-stage ion exchanger 9 for secondary sodium ion removal. The exhaust gas passing through the first gas-liquid separator 3 passes through the first one-way valve 4 and then the first sodium ion concentration sensor 5 to detect the concentration. When the concentration does not meet the standard, the first solenoid valve 6 closes and the second solenoid valve 7 opens. The exhaust gas flows back through the second one-way valve 8 to the first-stage ion exchanger 2 for sodium ion removal. This cycle continues until the concentration meets the standard, at which point the first solenoid valve 6 opens. When the exhaust gas enters the direct contact spray heat exchanger 15, similarly, the water in the secondary ion exchanger 9 passes through the second sodium ion concentration sensor 10 to detect the sodium ion concentration. If the concentration is below the standard, the third solenoid valve 11 closes, and the fourth solenoid valve 12 opens. The water returns to the secondary ion exchanger 9 through the third one-way valve 13 for circulation until the concentration reaches the standard. After that, the third solenoid valve 11 opens, and the water enters the medium-temperature water tank 14-2 from the first inlet 14-1 of the medium-temperature water tank for domestic use. After the exhaust gas enters the direct contact spray heat exchanger 15, it passes through two layers of packing zones 15-3 and 15-4 and comes into direct contact with the water sprayed from the nozzle 15-5. The three concentration sensors are: zone A concentration sensor 15-2, zone B concentration sensor 15-10, and zone C concentration sensor 15-10. 11. The concentration of different areas is fed back to the control device. Based on the real-time monitored flow data, the control device issues a command to adjust the opening of the flow control valve group 15-6, thereby adjusting the flow of the nozzle 15-5. If the concentration in the shell-and-tube heat exchanger 17 is still uneven, the servo motor 15-9 is turned on to adjust the angle of the nozzle 15-5. After the exhaust gas flows out from the second gas outlet 15-8, it passes through the gas-liquid separator 16 and enters the shell-and-tube heat exchanger 17. The generated hot water enters the second inlet 14-3 of the medium-temperature water tank through the hot water outlet 17-1 of the shell-and-tube heat exchanger 17. The cold water is supplied from the cooling water outlet 17-3 through the second filter 18 and the fourth one-way valve 19 to the direct contact spray heat exchanger 15 and then into the spray water pipe 15-7. A small portion of the remaining waste gas enters condenser 20 and is then transported to air cooler 21 before being discharged into the atmosphere. Water produced in condenser 20 passes through temperature sensor 22. If the temperature is high, the sixth solenoid valve 24 closes, and the fifth solenoid valve 23 opens, allowing water to enter the second inlet 14-3 of the medium-temperature water tank. If the temperature is low, the fifth solenoid valve 23 closes, and the sixth solenoid valve 24 opens, allowing water to enter the low-temperature water tank inlet 14-7 of the insulated water tank. The low-temperature water in the insulated water tank 14 enters the cooling chamber 25 through the low-temperature water tank outlet 14-8, is cooled, and then enters the cooling water tank 27 through the cooling water tank inlet 27-1. When the level gauge 27-4 is below one-third of the cold water tank level, the seventh solenoid valve 26 and water pump 28 open to replenish water to the cooling water tank 27 through the replenishment inlet 27-3.The process stops when the water level reaches the inlet height of the cooling water tank 27-1. Water from the cooling water tank 27 is supplied to the shell-and-tube heat exchanger 17 via water pump 28.

[0035] The device operates as follows: A pre-treatment unit removes particulate matter and impurities from the exhaust gas. A multi-stage ion exchange unit then removes sodium ions and recovers some heat energy. The exhaust gas further passes through a multi-stage heat exchange system for heat recovery, initially through a direct-contact spray heat exchanger, followed by an indirect-contact heat exchanger. It is equipped with a control and monitoring system to optimize exhaust gas flow and temperature through real-time monitoring and intelligent adjustment, thereby improving heat recovery efficiency. The remaining exhaust gas is condensed into water vapor in a condenser. The recovered condensate is sent to a water tank or water replenishment device for recycling. The recovered water can also be used for residential purposes and subsequent condensate recycling, comprehensively achieving efficient recovery and utilization of exhaust gas, energy, and water resources.

[0036] The beneficial effects achieved by this utility model can be summarized as follows: 1. Innovative design of multi-stage ion exchange device for waste gas: The multi-stage ion exchange device can simultaneously remove sodium ions from waste gas and recover some heat energy, combining the integrated design of heat energy recovery and ion exchange functions.

[0037] 2. Zonal control of direct contact spray heat exchanger: In a multi-stage heat exchange device, the direct contact spray heat exchanger is divided into multiple zones according to the waste gas diffusion pattern. The spray flow rate is precisely controlled by servo motors and valve groups to maximize heat exchange efficiency and save water resources.

[0038] 3. Integrated multiphase flow heat exchange and separation device: By combining gas-liquid two-phase flow treatment with multiple heat exchange stages, the gas-liquid heat recovery and separation effect can be automatically adjusted according to the different properties of the airflow (such as flow rate, temperature, etc.), thereby improving the overall processing efficiency of the device.

[0039] 4. Dynamic control and optimization function: The device is equipped with a real-time monitoring unit, which, together with servo motors and sensors, dynamically adjusts the temperature and flow rate of the exhaust gas to optimize energy efficiency and resource utilization in the heat exchange process.

[0040] 5. Zoned waste heat storage design for medium and low temperature zones: The recovered water is stored in zones according to temperature, which not only meets the domestic water demand of residents, but also provides heat energy support for the recycling of condensate.

[0041] 6. Integrated Condensate Recovery and Recycling: By combining the condenser and water replenishment device, condensate is recovered and integrated with the water storage device to achieve efficient recycling of water resources.

[0042] 7. High integration of the device: It integrates the functions of waste gas pretreatment, multi-stage ion exchange, multi-stage heat exchange, real-time monitoring, condensate recovery and waste heat utilization into one device, forming a highly integrated and multifunctional device design.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for recovering and utilizing waste heat from high-temperature exhaust gas in a cigarette factory, characterized in that, Including those connected in sequence: The exhaust gas pretreatment device includes a first filter (1) for filtering exhaust gas particulate matter; An ion exchange device is configured with a multi-stage ion exchanger and a first gas-liquid separator (3) for removing sodium ions and recovering heat energy. The multi-stage ion exchanger is configured with two stages, specifically including: a first-stage ion exchanger (2), in which a first resin layer (2-1) and a second resin layer (2-2) are provided. A first gas outlet (2-3) is provided at the top of the first-stage ion exchanger (2) and connected to the first gas-liquid separator (3). A first liquid outlet (2-4) is provided at the bottom of the first-stage ion exchanger (2) and connected to the second-stage ion exchanger (9). The second-stage ion exchanger (9) forms a circulation loop through a sodium ion concentration sensor and an electrically controlled valve. The liquid outlet of the first gas-liquid separator (3) is connected to the second-stage ion exchanger (9), and the gas outlet is connected to the inlet of the first-stage ion exchanger (2) through a sodium ion concentration sensor and a reflux valve group. A multi-stage heat exchange device, comprising a direct contact spray heat exchanger (15) and a shell-and-tube heat exchanger (17). Condensate recovery unit, used for condensing water vapor; Waste heat recovery device, including a partitioned insulated water tank (14). The control device achieves dynamic adjustment through sensors and electronically controlled valves.

2. The apparatus according to claim 1, characterized in that, The direct contact spray heat exchanger (15) includes three spray zones A, B and C divided along the airflow direction, each spray zone is equipped with a concentration sensor; the direct contact spray heat exchanger (15) is provided with a first layer of packing zone (15-3) and a second layer of packing zone (15-4).

3. The apparatus according to claim 2, characterized in that, The direct contact spray heat exchanger (15) has a spray water pipe (15-7) and a nozzle (15-5) on the upper part of the first layer packing area (15-3) and the second layer packing area (15-4). A flow control valve group (15-6) is installed on the spray water pipe (15-7). The nozzle (15-5) is connected to a servo motor (15-9), and the angle of the nozzle (15-5) can be adjusted by the servo motor (15-9).

4. The apparatus according to claim 3, characterized in that, The top of the direct contact spray heat exchanger (15) is provided with a second gas outlet (15-8), which is connected to a second gas-liquid separator (16). The exhaust gas enters the shell-and-tube heat exchanger (17) through the second gas-liquid separator (16).

5. The apparatus according to claim 4, characterized in that, The cooling water in the shell-and-tube heat exchanger (17) is connected to the spray water pipe (15-7) through the cooling water outlet (17-3) via the second filter (18) and the fourth one-way valve (19). Its hot water outlet (17-1) is connected to the medium-temperature water tank (14-2) of the insulated water tank (14) for use as domestic water.

6. The apparatus according to claim 5, characterized in that, Part of the exhaust gas in the shell-and-tube heat exchanger (17) enters the condenser (20) and is then transported to the air cooler (21) before being discharged into the atmosphere.

7. The apparatus according to claim 6, characterized in that, The condensate recovery device includes a condenser (20). The water generated by the condenser (20) flows out and passes through a temperature sensor (22). If the temperature is high, the sixth electric control valve (24) closes and the fifth electric control valve (23) opens, and the water enters the medium-temperature water tank (14-2). If the temperature is low, the fifth electric control valve (23) closes and the sixth electric control valve (24) opens, and the water enters the low-temperature water tank (14-6).

8. The apparatus according to claim 2, characterized in that, The control device includes: a sodium ion concentration sensor linked to an electrically controlled valve and a one-way valve to realize ion exchange circulation; a concentration sensor in the spray area linked to a flow control valve group (15-6) and a servo motor (15-9); and a temperature sensor controlling a condensate electrically controlled valve.

9. The apparatus according to claim 8, characterized in that, The sodium ion concentration sensor is a glass electrode type Na⁺ sensor.

10. The apparatus according to claim 3, characterized in that, The adjustment logic of the nozzle (15-5) is as follows: when the concentration difference between adjacent areas is greater than 15%, the servo motor (15-9) drives the nozzle (15-5) to deflect 5°-30° towards the high concentration area; the spray flow rate increases with the increase of exhaust gas temperature, and the flow rate increases by 5%-8% for every 10° increase in temperature.

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