Bypass flue drying system and method for enhancing flue gas flow

Abstract

The invention belongs to the technical field of zero discharge of high-salinity wastewater, and particularly relates to a bypass flue drying system and method for enhancing flue gas flow. The system mainly comprises a wastewater evaporation module, a high-temperature bypass flue module and a recovery flue module, the recovery flue module comprises a bypass flue, and a bypass flue induced draft fan is arranged on the bypass flue; the input end of the wastewater evaporation module is connected with the output end of the high-temperature bypass flue module, the output end of the wastewater evaporation module is connected with the input end of the recovery flue module, the input end of the high-temperature bypass flue module is connected with an SCR flue gas channel, and the output end of the recovery flue module is connected with the SCR flue gas channel. By additionally arranging the bypass flue and the induced draft fan, the flue gas flow can be actively adjusted, even under the low-load working condition, the flue gas flow of the bypass flue can be increased through the suction effect of the induced draft fan, it is ensured that the system has enough heat for waste water evaporation, and the waste water treatment quality and efficiency are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of zero discharge of high-salt wastewater, and particularly relates to a bypass flue drying system and method for enhancing flue gas flow rate. Background Art

[0002] In recent years, in the field of high-salt wastewater treatment, the precise regulation of flue gas flow rate is crucial for improving wastewater treatment efficiency. Since high-salt wastewater is at the end of the cascade utilization of the whole plant's water system, its water quality is complex and the treatment difficulty is large, which is a major environmental protection hidden danger. The high-temperature bypass flue gas drying tower technology has received wide attention due to its advantages such as simple process equipment, low investment cost, small impact on the main flue system, and high degree of automation. However, there are some problems in the existing technology. For example, when the unit is at low load, the flue gas volume taken by using the differential pressure of the air preheater may be insufficient, resulting in a reduction in the water treatment capacity of the high-temperature bypass flue gas drying system and unable to reach the designed output, thus affecting the zero discharge effect of high-salt wastewater.

[0003] To solve the above problems, in the invention application "A bypass flue drying system and method for regulating flue gas flow rate" with the application number 202510022784.6, through the design of a wastewater evaporator, a high-temperature bypass flue and a recovery flue, combined with a variety of sensors and control modules, precise control of flue gas and wastewater flow rates is achieved, improving the evaporation efficiency and treatment effect. However, this system may still have problems with insufficient flue gas flow rate regulation under low-load conditions, especially when it is necessary to further increase the flue gas flow rate to meet the treatment requirements, the regulation ability of the system is limited. Summary of the Invention

[0004] The present invention provides a bypass flue drying system and method for enhancing flue gas flow rate to solve the technical problem in the existing technology that the bypass flue gas flow rate is low, affecting the zero discharge effect of high-salt wastewater.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A bypass flue drying system for enhancing flue gas flow rate includes a wastewater evaporation module, a high-temperature bypass flue module, and a recovery flue module. The recovery flue module includes a bypass flue, and a bypass flue induced draft fan is arranged on the bypass flue; the input end of the wastewater evaporation module is connected to the output end of the high-temperature bypass flue module, the output end of the wastewater evaporation module is connected to the input end of the recovery flue module, the input end of the high-temperature bypass flue module is connected to the SCR flue gas channel, and the output end of the recovery flue module is connected to the SCR flue gas channel.

[0006] The wastewater evaporation module includes a wastewater evaporator, a rotary atomizer is arranged at the top inside the wastewater evaporator, and the inlet pipe of the wastewater evaporator is connected to the high-salt wastewater inlet and the input end of the high-temperature bypass flue module.

[0007] A spray flowmeter and a waste water regulating valve are arranged on the water inlet pipeline of the waste water evaporator. The spray flowmeter and the waste water regulating valve are connected to a control module, and the control module adjusts the opening degree of the waste water regulating valve in real time according to the monitoring data of the spray flowmeter.

[0008] The lower end of the waste water evaporator is a conical hopper. A hopper outlet automatic slide valve is arranged at the outlet of the conical hopper. A conical hopper level gauge is arranged in the conical hopper. The hopper outlet automatic slide valve and the conical hopper level gauge are connected to a control module, and the control module adjusts the opening degree of the hopper outlet automatic slide valve in real time according to the monitoring data of the conical hopper level gauge.

[0009] The lower end of the waste water evaporator is connected to an ash discharge module through a hopper outlet automatic slide valve.

[0010] A waste water evaporator side wall thermocouple and a waste water evaporator center thermocouple are arranged on the side wall of the waste water evaporator. The waste water evaporator side wall thermocouple and the waste water evaporator center thermocouple are connected to the control module, and the control module receives the monitoring data of the waste water evaporator side wall thermocouple and the waste water evaporator center thermocouple in real time.

[0011] The high-temperature bypass flue gas module includes a high-temperature bypass flue. The inlet pipeline of the waste water evaporator is connected to the flue outlet of the high-temperature bypass flue. An evaporator inlet electric regulating valve, an evaporator inlet thermocouple and an evaporator inlet flue gas flowmeter are arranged on the high-temperature bypass flue. The evaporator inlet electric regulating valve, the evaporator inlet thermocouple and the evaporator inlet flue gas flowmeter are all connected to the control module, and the control module adjusts the opening degree of the evaporator inlet electric regulating valve in real time according to the monitoring data of the evaporator inlet thermocouple and the evaporator inlet flue gas flowmeter.

[0012] The recovery flue module includes a recovery flue. An evaporator outlet electric door is arranged on the recovery flue. A bypass flue gas induced draft fan is connected in parallel with the evaporator outlet electric door. An evaporator outlet pressure transmitter and an evaporator outlet thermocouple are also arranged on the recovery flue. The evaporator outlet pressure transmitter, the evaporator outlet thermocouple and the evaporator outlet electric door are connected to the control module, and the control module adjusts the opening degree of the evaporator outlet electric door in real time according to the monitoring data of the evaporator outlet pressure transmitter and the evaporator outlet thermocouple.

[0013] A flue gas inlet manual baffle door is included in the high-temperature bypass flue gas module, and a flue outlet manual baffle door is included in the recovery flue module. The flue gas inlet manual baffle door and the flue outlet manual baffle door are in a closed state when the high-temperature bypass flue gas module and the recovery flue module are under maintenance.

[0014] A method for enhancing the flue gas flow rate in a bypass flue is as follows: The SCR flue gas passage inputs high-temperature flue gas into the wastewater evaporation module through the high-temperature bypass flue gas module. The high-salt wastewater in the wastewater evaporation module evaporates under the action of the high-temperature flue gas to generate evaporation flue gas. The evaporation flue gas is redirected to the SCR flue gas passage through the flue gas recovery module. The bypass flue gas induced draft fan on the flue gas recovery module further enhances the flue gas flow rate of the flue gas recovery module.

[0015] Compared with the prior art, the present invention has the following beneficial effects: A bypass flue drying system for enhancing the flue gas flow rate disclosed by the present invention can actively adjust the flue gas flow rate by adding a bypass flue and an induced draft fan. Even under low-load conditions, the suction effect of the induced draft fan can increase the flue gas flow rate in the bypass flue, ensuring that the system has sufficient heat for wastewater evaporation. The bypass flue gas induced draft fan can also dynamically adjust the flue gas flow rate according to actual needs, enabling the system to better adapt to different working conditions, improving the overall flexibility and stability of the system. By increasing the flue gas flow rate through the bypass flue gas induced draft fan, it is ensured that the wastewater can be fully evaporated. After adding the bypass flue gas induced draft fan, the recovery efficiency of the flue gas generated in the evaporator can be accelerated, ensuring that the wastewater is in full contact with the high-temperature flue gas in the evaporator, improving the evaporation efficiency, reducing residues, and enhancing the quality of wastewater treatment.

[0016] Furthermore, the introduction of the induced draft fan on the bypass flue in the flue gas recovery module provides an additional adjustment means for the system, enhancing the reliability and stability of the system, ensuring stable operation under different working conditions, and achieving zero discharge of high-salt wastewater. The bypass flue gas induced draft fan provides an additional adjustment means for the system. The control module can dynamically adjust the operating frequency of the induced draft fan according to real-time monitoring data, further optimizing the system operation control, improving the automation level, and ensuring that the system can still operate efficiently under low-load conditions, meeting the requirements of zero discharge of high-salt wastewater and enhancing the environmental adaptability of the system. Description of the Drawings

[0017] Figure 1 : Schematic diagram of the bypass flue drying system module for enhancing the flue gas flow rate; Figure 2 : Schematic diagram of the structure of the bypass flue drying system for enhancing the flue gas flow rate.

[0018] Label description: 1. Wastewater evaporator; 2. Air preheater; 3. Induced draft fan for bypass flue; 4. Spray flowmeter; 5. Wastewater regulating valve; 6. Rotary atomizer; 7. Manual damper at flue inlet; 8. High-temperature bypass flue; 9. Pressure transmitter at flue inlet; 10. Electric control valve at evaporator inlet; 11. Thermocouple at evaporator inlet; 12. Flue gas flowmeter at evaporator inlet; 13. Thermocouple on side wall of wastewater evaporator; 14. Thermocouple at center of wastewater evaporator; 15. Hopper level gauge; 16. Automatic slide gate valve at hopper outlet; 17. Pressure transmitter at evaporator outlet; 18. Thermocouple at evaporator outlet; 19. Electric valve at evaporator outlet; 20. Pressure transmitter at flue outlet; 21. Manual damper at flue outlet; 22. SCR flue gas passage; 23. Recovery flue; 24. Control module; 25. Wastewater evaporation module; 26. High-temperature bypass flue module; 27. Recovery flue module; 28. Ash discharge module; 29. Inlet for high-salt wastewater. Detailed implementation manners

[0019] To further understand the content of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments are only for explaining the present invention and not for limiting it.

[0020] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] As Figure 1 and Figure 2As shown in the figure, a bypass flue drying system for enhancing flue gas flow includes a wastewater evaporation module 25, a high-temperature bypass flue module 26, a recovery flue module 27, an ash discharge module 28, and a control module 24. The wastewater evaporation module 25 includes a wastewater evaporator 1. A spray flowmeter 4 and a wastewater regulating valve 5 are provided on the inlet pipeline of the wastewater evaporator 1. A rotary atomizer 6 is provided on the wastewater evaporator 1. The inlet pipeline of the wastewater evaporator 1 is connected to a high-salt wastewater inlet 29. A wastewater evaporator sidewall thermocouple 13 and a wastewater evaporator center thermocouple 14 are installed on the sidewall of the wastewater evaporator 1. The output of the wastewater evaporation module 25 is connected to the recovery flue module 27 and the ash discharge module 28. The lower end of the wastewater evaporator 1 is a hopper, and a hopper outlet automatic slide valve 16 is provided on the outlet pipeline of the hopper at the lower end of the wastewater evaporator 1. The outlet pipeline of the hopper is connected to the ash discharge system; One end of the recovery flue module 27 is connected to the wastewater evaporation module 25, and the other end of the recovery flue module 27 is connected to the SCR (Selective Catalytic Reduction, abbreviated as SCR) flue gas passage 22. The recovery flue module 27 includes a recovery flue 23. An evaporator outlet pressure transmitter 17, an evaporator outlet thermocouple 18, an evaporator outlet motorized valve 19, a flue outlet pressure transmitter 20, and a flue outlet manual damper 21 are provided on the recovery flue 23. A bypass flue is provided below the evaporator outlet motorized valve 19. A bypass flue induced draft fan 3 is provided on the bypass flue. The bypass flue induced draft fan 3 is connected in parallel with the evaporator outlet motorized valve 19; The high-temperature bypass flue module 26 includes a high-temperature bypass flue 8. The inlet pipeline of the wastewater evaporator 1 is connected to the flue outlet of the high-temperature bypass flue 8. An evaporator inlet motorized regulating valve 10, an evaporator inlet thermocouple 11, and an evaporator inlet flue gas flowmeter 12 are provided on the high-temperature bypass flue 8. The control module 24 controls the opening degrees of the wastewater regulating valve 5, the flue inlet manual damper 7, the evaporator inlet motorized regulating valve 10, the hopper outlet automatic slide valve 16, the evaporator outlet motorized valve 19, the flue outlet manual damper 21, and the operating frequency of the bypass flue induced draft fan 3 according to the temperature, flow, and pressure data monitored in real time by the spray flowmeter 4, the evaporator inlet thermocouple 11, the evaporator inlet flue gas flowmeter 12, the flue inlet pressure transmitter 9, the sidewall-mounted wastewater evaporator sidewall thermocouple 13, the wastewater evaporator center thermocouple 14, the hopper level gauge 15, the evaporator outlet pressure transmitter 17, the evaporator outlet thermocouple 18, and the flue outlet pressure transmitter 20. A flue outlet manual damper 21 is also provided on the recovery flue 23. A flue inlet manual damper 7 is provided on the high-temperature bypass flue 8. When the high-temperature bypass flue and the recovery flue are under maintenance, the flue outlet manual damper 21 and the flue inlet manual damper 7 are in the closed state.

[0022] This embodiment provides a method for enhancing the flue gas flow rate in the bypass flue, based on a bypass flue drying system for enhancing the flue gas flow rate, including a waste water evaporation module 25, a high-temperature bypass flue module 26, a recovery flue module 27, an ash discharge module 28, and a control module 24. The waste water evaporation module 25 includes a waste water evaporator 1, a high-salt waste water inlet 29, a spray flow meter 4, a waste water regulating valve 5, a rotary atomizer 6, a waste water evaporator side wall thermocouple 13, a waste water evaporator center thermocouple 14, a hopper level gauge 15, and a hopper outlet automatic slide valve 16; the high-temperature bypass flue module 26 includes a high-temperature bypass flue 8, and the high-temperature bypass flue 8 is provided with an evaporator inlet electric regulating valve 10, an evaporator inlet thermocouple 11, an evaporator inlet flue gas flow meter 12, a flue inlet manual damper 7, and a flue inlet pressure transmitter 9; the recovery flue module 27 includes a recovery flue 23, and the recovery flue 23 is provided with an evaporator outlet pressure transmitter 17, an evaporator outlet thermocouple 18, an evaporator outlet electric valve 19, a flue outlet pressure transmitter 20, a flue outlet manual damper 21, and a bypass flue induced draft fan 3, and the bypass flue induced draft fan 3 is a variable-frequency induced draft fan; an air preheater 2 is provided on the SCR flue gas passage 22. According to the above-mentioned bypass flue drying system for increasing the flue gas flow rate, the specific implementation method is as follows: Technicians preset the initial opening degree of the waste water regulating valve 5 and the initial operating frequency of the bypass flue induced draft fan 3 according to the treatment volume of the high-salt waste water and the flue gas characteristics, and at the same time adjust the opening ratio of the evaporator inlet electric regulating valve 10 on the high-temperature bypass flue 8; the high-salt waste water enters the water inlet pipeline of the waste water evaporator 1 from the high-salt waste water inlet 29, and after passing through the waste water regulating valve 5, it is sprayed into the waste water evaporator 1 after high-speed rotation through the rotary atomizer 6; at the same time, the flue gas in the SCR flue gas passage 22 is heated by the air preheater 2 to form high-temperature flue gas, and the high-temperature flue gas is input into the high-temperature bypass flue 8, and after passing through the evaporator inlet electric regulating valve 10, it enters the waste water evaporator 1. The high-temperature flue gas fully contacts the high-salt waste water sprayed by the rotary atomizer 6 in the waste water evaporator 1 to evaporate water and form soot, and the soot falls into the hopper at the lower end of the waste water evaporator 1. The outlet of the hopper is connected to the ash discharge module 28, and the soot is discharged through the ash discharge module 28. The high-temperature flue gas that has not participated in evaporation in the waste water evaporator 1 re-enters the SCR flue gas passage 22 through the recovery flue 23 connected to the lower end of the waste water evaporator 1.

[0023] A hopper level gauge 15 is arranged in the hopper at the lower end of the wastewater evaporator 1. The hopper level gauge 15 monitors the height of the soot falling into the hopper in real time. The hopper level gauge 15 sends the data of the hopper soot height to the control module 24. The control module 24 is preset with a hopper level threshold. When the hopper soot height is equal to the hopper level threshold, the control module 24 controls the automatic slide valve 16 at the outlet below the hopper to open. Otherwise, when the hopper soot height is less than the hopper level threshold, the automatic slide valve 16 at the hopper outlet is in the closed state.

[0024] A sidewall thermocouple 13 of the wastewater evaporator is installed on the sidewall of the wastewater evaporator 1, and a central thermocouple 14 of the wastewater evaporator is installed at the central part of the wastewater evaporator 1. The sidewall thermocouple 13 of the wastewater evaporator and the central thermocouple 14 of the wastewater evaporator monitor the sidewall temperature and the central temperature of the wastewater evaporator 1 in real time. The sidewall thermocouple 13 of the wastewater evaporator and the central thermocouple 14 of the wastewater evaporator send the temperature data monitored in real time to the control module 24. The control module 24 takes the average value of the sidewall temperature and the central temperature to obtain the average temperature value of the wastewater evaporator. The control module 24 is preset with a preset temperature value of the wastewater evaporator in advance. The control module 24 judges whether the heating state in the wastewater evaporator 1 can meet the evaporation requirements of the high-salt wastewater according to the average temperature value of the wastewater evaporator and the preset temperature value of the wastewater evaporator.

[0025] If the average temperature value of the wastewater evaporator is less than the preset temperature value of the wastewater evaporator, it indicates that the heat inside the wastewater evaporator 1 is insufficient. The control module 24 controls the electric regulating valve 10 at the evaporator inlet to increase the opening degree to increase the flue gas introduced from the SCR flue gas channel through the high-temperature bypass flue. After a period of time, if the average temperature value of the sidewall temperature and the central temperature of the wastewater evaporator 1 monitored by the sidewall thermocouple 13 of the wastewater evaporator and the central thermocouple 14 of the wastewater evaporator is still lower than the preset temperature value of the wastewater evaporator, the control module 24 sends a control signal to the evaporator outlet electric valve 19 on the recovery flue 23 to control the evaporator outlet electric valve 19 to close, and adjusts the operating frequency of the bypass flue induced draft fan 3 to decrease, ensuring that all the flue gas entering the wastewater evaporator 1 remains in the wastewater until the average temperature value of the wastewater evaporator is equal to the preset temperature value of the wastewater evaporator. Then the control module 24 controls the evaporator outlet electric valve 19 to open again and restores the initial operating frequency of the bypass flue induced draft fan 3.

[0026] On the contrary, if the average temperature value of the wastewater evaporator is greater than the preset temperature value of the wastewater evaporator, the control module 24 sends a control signal to the wastewater regulating valve 5 on the water inlet pipeline of the wastewater evaporator 1 to control the wastewater regulating valve 5 to increase the opening degree so as to increase the flow rate of the high-salt wastewater; a spray flowmeter 4 is also arranged on the water inlet pipeline of the wastewater evaporator 1, and the spray flowmeter 4 monitors the flow rate of the high-salt wastewater flowing into the wastewater evaporator 1 in real time. After corresponding calculations based on the preset temperature value of the wastewater evaporator, the control module 24 sets an adapted flow rate value. After the control module 24 controls the wastewater regulating valve 5 to increase the opening degree, the control module 24 monitors in real time whether the flow rate value of the spray flowmeter 4 reaches the set adapted flow rate value. If the flow rate value of the spray flowmeter 4 does not reach the set adapted flow rate value, the control module 24 controls the wastewater regulating valve 5 to continue to increase the opening degree until the flow rate value of the spray flowmeter 4 is greater than or equal to the set adapted flow rate value, and then maintains the current opening degree of the wastewater regulating valve 5.

[0027] Further preferably, to ensure the smooth passage of flue gas in the recovery flue 23, it is necessary to ensure that the pressure at the outlet of the recovery flue 23 is less than the pressure at the inlet of the recovery flue 23. Pressure transmitters 17 at the evaporator outlet and 20 at the flue outlet are respectively arranged at the inlet and outlet of the recovery flue. The pressure transmitters 17 at the evaporator outlet and 20 at the flue outlet monitor the pressure values at the inlet and outlet of the recovery flue 23 in real time and send the pressure data to the control module 24. The control module 24 controls the pressure values of the pressure transmitters 17 at the evaporator outlet and 20 at the flue outlet. The pressure value displayed by the pressure transmitter 17 at the evaporator outlet should be greater than the pressure value displayed by the pressure transmitter 20 at the flue outlet, and the pressure difference between the two should be maintained between 0.08 - 1.5 KPa to ensure the normal smoke exhaust of the SCR flue gas passage 22. When the pressure value displayed by the pressure transmitter 17 at the evaporator outlet is less than or equal to the pressure value displayed by the pressure transmitter 20 at the flue outlet, the control module 24 sends a control signal to the bypass flue induced draft fan 3 to control the bypass flue induced draft fan 3 to increase the operating frequency, so that the flue gas at the outlet of the recovery flue 23 quickly passes through the SCR flue gas passage 22, reducing the pressure at the outlet of the recovery flue 23 and making the pressure value displayed by the pressure transmitter 17 at the evaporator outlet greater than the pressure value displayed by the pressure transmitter 20 at the flue outlet. The pressure transmitter 9 at the flue inlet on the high-temperature bypass flue 8 monitors the pressure value in the inlet pipeline of the high-temperature bypass flue 8 in real time. The pressure transmitter 9 at the flue inlet sends the pressure value in the inlet pipeline of the high-temperature bypass flue 8 to the control module 24, and the control module 24 adjusts the opening of the electric regulating valve 10 at the evaporator inlet according to this data; the pressure value of the pressure transmitter 9 at the flue inlet should be greater than the pressure value of the pressure transmitter 17 at the evaporator outlet. When the pressure value of the pressure transmitter 9 at the flue inlet is less than or equal to the pressure value of the pressure transmitter 17 at the evaporator outlet, the control module 24 controls the electric regulating valve 10 at the evaporator inlet to reduce the opening, increasing the pressure value of the pressure transmitter 9 at the flue inlet until the pressure value of the pressure transmitter 9 at the flue inlet is greater than the pressure value of the pressure transmitter 17 at the evaporator outlet.

[0028] Further preferably, a manual baffle valve 21 at the flue outlet is arranged on the outlet pipeline of the recovery flue 23, and a manual baffle valve 7 at the flue inlet is arranged on the inlet pipeline of the high-temperature bypass flue 8. During the high-salt wastewater treatment process, the manual baffle valve 21 at the flue outlet and the manual baffle valve 7 at the flue inlet are in the open state. When the recovery flue 23 and the high-temperature bypass flue 8 need to be overhauled, technicians close the manual baffle valve 21 at the flue outlet and the manual baffle valve 7 at the flue inlet before overhauling.

[0029] Further preferably, an evaporator outlet thermocouple 18 is provided on the inlet pipe of the recovery flue 23, and an evaporator inlet thermocouple 11 is provided on the evaporator inlet of the high-temperature bypass flue 8. Both the evaporator outlet thermocouple 18 and the evaporator inlet thermocouple 11 are connected to the control module 24. The evaporator outlet thermocouple 18 and the evaporator inlet thermocouple 11 send the flue gas temperature data monitored in real time at the inlet and outlet of the evaporator to the control module 24. The control module 24 sends the data to the middle section display for display. Technicians monitor the flue gas temperature at the inlet and outlet of the waste water evaporator 1 through the data displayed on the display screen. In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of the present invention and cannot be used to limit the protection scope of the present invention. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the claims of the present invention.

Claims

1. A bypass flue drying system for enhancing flue gas flow, characterized in that: The invention comprises a wastewater evaporation module (25), a high-temperature bypass flue module (26) and a recovery flue module (27); the recovery flue module (27) comprises a bypass flue, and a bypass flue induced draft fan (3) is arranged on the bypass flue; the input end of the wastewater evaporation module (25) is connected to the output end of the high-temperature bypass flue module (26), the output end of the wastewater evaporation module (25) is connected to the input end of the recovery flue module (27), the input end of the high-temperature bypass flue module (26) is connected to an SCR flue gas channel (22), and the output end of the recovery flue module (27) is connected to the SCR flue gas channel (22).

2. A bypass flue drying system for enhancing flue gas flow according to claim 1, characterized in that: The wastewater evaporation module (25) comprises a wastewater evaporator (1), a rotary atomizer (6) being arranged at the top of the interior of the wastewater evaporator (1), and an inlet pipe of the wastewater evaporator (1) being connected to a high-salinity wastewater inlet (29) and an input end of a high-temperature bypass flue module (26).

3. A bypass flue drying system for enhancing flue gas flow according to claim 2, characterized in that: A spray flow meter (4) and a wastewater regulating valve (5) are provided on the water inlet pipe of the wastewater evaporator (1); the spray flow meter (4) and the wastewater regulating valve (5) are connected to a control module (24); the control module (24) adjusts the opening of the wastewater regulating valve (5) in real time according to monitoring data of the spray flow meter (4).

4. A bypass flue drying system for enhancing flue gas flow according to claim 3, characterized in that: The lower end of the wastewater evaporator (1) is a cone hopper, and an outlet of the cone hopper is provided with an automatic gate valve (16) at the outlet of the cone hopper. A cone hopper material level meter (15) is provided in the cone hopper. The automatic gate valve (16) at the outlet of the hopper and the cone hopper material level meter (15) are connected to a control module (24). The control module (24) adjusts the opening of the automatic gate valve (16) at the outlet of the hopper in real time according to monitoring data of the cone hopper material level meter (15).

5. A bypass flue drying system for enhancing flue gas flow according to claim 4, characterized in that: The lower end of the wastewater evaporator (1) is connected to an ash discharge module (28) via a hopper outlet automatic gate valve (16).

6. A bypass flue drying system for enhancing flue gas flow according to claim 5, characterized in that: A wastewater evaporator side wall thermocouple (13) and a wastewater evaporator center thermocouple (14) are arranged on the side wall of the wastewater evaporator (1); the wastewater evaporator side wall thermocouple (13) and the wastewater evaporator center thermocouple (14) are connected to a control module (24); and the control module (24) receives monitoring data of the wastewater evaporator side wall thermocouple (13) and the wastewater evaporator center thermocouple (14) in real time.

7. A bypass flue drying system for enhancing flue gas flow according to claim 2, characterized in that: The high-temperature bypass flue module (26) comprises a high-temperature bypass flue (8); an inlet pipe of the wastewater evaporator (1) is connected to a flue outlet of the high-temperature bypass flue (8); an evaporator inlet electric regulating door (10), an evaporator inlet thermocouple (11) and an evaporator inlet flue gas flow meter (12) are provided on the high-temperature bypass flue (8); the evaporator inlet electric regulating door (10), the evaporator inlet thermocouple (11) and the evaporator inlet flue gas flow meter (12) are all connected to a control module (24); and the control module (24) adjusts the opening of the evaporator inlet electric regulating door (10) in real time according to monitoring data of the evaporator inlet thermocouple (11) and the evaporator inlet flue gas flow meter (12).

8. A bypass flue drying system for enhancing flue gas flow according to claim 1, characterized in that: The recovery flue module (27) comprises a recovery flue (23), an evaporator outlet electric door (19) is arranged on the recovery flue (23), a bypass flue induced draft fan (3) is connected in parallel with the evaporator outlet electric door (19), an evaporator outlet pressure transmitter (17) and an evaporator outlet thermocouple (18) are also arranged on the recovery flue (23), the evaporator outlet pressure transmitter (17), the evaporator outlet thermocouple (18), and the evaporator outlet electric door (19) are connected to the control module (24), and the control module (24) adjusts the opening of the evaporator outlet electric door (19) in real time according to monitoring data of the evaporator outlet pressure transmitter (17) and the evaporator outlet thermocouple (18).

9. A bypass flue drying system for enhancing flue gas flow according to claim 1, characterized in that: The high-temperature bypass flue module (26) includes a flue gas inlet manual damper door (7), and the recovery flue module (27) includes a flue gas outlet manual damper door (21). The flue gas inlet manual damper door (7) and the flue gas outlet manual damper door (21) are in a closed state when the high-temperature bypass flue module (26) and the recovery flue module (27) are under maintenance.

10. A method for increasing the flue gas flow rate of a bypass flue, based on a bypass flue drying system for increasing the flue gas flow rate according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: the SCR flue gas channel (22) inputs high-temperature flue gas into the wastewater evaporation module (25) through a high-temperature bypass flue module (26); the high-salt wastewater in the wastewater evaporation module (25) evaporates under the action of the high-temperature flue gas to generate evaporated flue gas; the evaporated flue gas is redirected into the SCR flue gas channel (22) through a flue gas recovery module (27); and the bypass flue induced draft fan (3) on the flue gas recovery module (27) further increases the flue gas flow rate of the flue gas recovery module (27).

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