Substrate glass flue gas wastewater dosing control system and method

Abstract

The invention discloses a substrate glass flue gas wastewater dosing control system and method. The system comprises a flue gas raw water tank, a raw water pump, a denitrification reaction tower, an ammonia nitrogen online analyzer, a dosing controller and a dosing system. Wherein the flue gas raw water tank, the raw water pump and the denitrification reaction tower are sequentially communicated to form a main flow channel for wastewater treatment. An ammonia nitrogen online analyzer is arranged on the flue gas raw water tank, is connected with the dosing controller, and can transmit detected wastewater ammonia nitrogen concentration information to the dosing controller in real time. The dosing controller is connected with a dosing system, and the dosing system is connected with an inlet of the denitrification reaction tower. Through cooperative operation of all the parts, the system can realize accurate dosing treatment of substrate glass flue gas wastewater, and provides powerful guarantee for efficient removal of ammonia nitrogen in wastewater.

Description

Technical Field

[0001] This invention belongs to the field of industrial wastewater treatment technology, and relates to a chemical dosing control system and method for substrate glass flue gas wastewater. Background Technology

[0002] In industrial production processes, furnace combustion generates a large amount of flue gas. After wet dust removal, this flue gas produces flue gas wastewater. The main pollutant in this type of wastewater is ammonia nitrogen. If it is not properly treated and discharged directly, it will not only cause serious pollution to the aquatic environment and disrupt the aquatic ecological balance, but may also trigger a series of environmental problems. Therefore, effective removal of ammonia nitrogen from flue gas wastewater is crucial. Currently, the system for treating ammonia nitrogen in flue gas wastewater employs a breakpoint chlorination process, which removes ammonia nitrogen by adding sodium hypochlorite to the wastewater. The principle behind this process is to utilize the oxidizing effect of sodium hypochlorite to convert ammonia nitrogen into harmless substances such as nitrogen gas, thereby reducing the ammonia nitrogen content in the wastewater. However, a prominent problem arises in actual treatment: the ammonia nitrogen content in the wastewater discharged from the production line is extremely unstable, fluctuating between 10-50 mg / L. Under these circumstances, the traditional method of manually adjusting the dosing pump reveals significant limitations. Because manual adjustment cannot precisely and in real-time adjust the sodium hypochlorite dosage according to changes in ammonia nitrogen content, the ammonia nitrogen treatment effect is unstable, sometimes resulting in substandard treatment or excessive ammonia nitrogen residue, failing to meet the requirements for stable and compliant discharge. Furthermore, inaccurate sodium hypochlorite dosage can lead to reagent waste, increased treatment costs, or insufficient dosage, affecting treatment effectiveness and placing considerable pressure on subsequent environmental management. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of unstable ammonia nitrogen treatment and inaccurate sodium hypochlorite dosage caused by manually adjusting the dosing pump in the prior art, and to provide a dosing control system and method for substrate glass flue gas wastewater.

[0004] To achieve the above objectives, the present invention employs the following technical solution: The first aspect of the present invention provides a chemical dosing control system for flue gas wastewater from substrate glass, including a flue gas raw water tank, a raw water pump, a denitrification reaction tower, an online ammonia nitrogen analyzer, a dosing controller, and a dosing system; The flue gas raw water tank, raw water pump and denitrification reaction tower are connected in sequence; The flue gas raw water tank is equipped with an online ammonia nitrogen analyzer; the online ammonia nitrogen analyzer is connected to a dosing controller, which is connected to a dosing system; the dosing system is connected to the inlet of the denitrification reaction tower; the dosing system includes a dosing pump and a robotic arm, and the dosing controller is electrically connected to the robotic arm; the dosing pump is connected to the denitrification reaction tower; the dosing controller controls the robotic arm to adjust the opening of the dosing pump to add chemicals to the denitrification reaction tower.

[0005] Furthermore, the dosing system also includes a storage tank; the inlet of the dosing pump is connected to the storage tank, and the outlet of the dosing pump is connected to the inlet of the denitrification reaction tower.

[0006] Furthermore, the dosing pump is equipped with a dosing pump regulating valve, and the dosing controller controls the robotic arm to adjust the opening of the dosing pump by adjusting the dosing pump regulating valve.

[0007] Furthermore, a level gauge is installed at the top of the flue gas raw water tank.

[0008] Furthermore, the level gauge is connected to the dosing controller.

[0009] Furthermore, the level gauge is equipped with a four-point level alarm system (HH, H, L, LL). When the level reaches H, the raw water pump starts, and when the level reaches L, the raw water pump stops.

[0010] Furthermore, the outlet of the denitrification reaction tower is connected to an exhaust pool.

[0011] A second aspect of the present invention provides a method for controlling the chemical dosing of wastewater from substrate glass flue gas, comprising the following steps: When the flue gas raw water tank reaches level H, the raw water pump is started to transport wastewater to the denitrification reaction tower; The online ammonia nitrogen analyzer periodically detects the ammonia nitrogen concentration in the flue gas raw water tank and feeds it back to the controller; The controller generates dosing pump opening commands based on the ammonia nitrogen concentration range; The robotic arm adjusts the opening of the dosing pump valve according to the dosing pump opening command to add chemicals to the denitrification reaction tower.

[0012] Furthermore, the controller generates a dosing pump opening command based on the ammonia nitrogen concentration range, specifically as follows: When the ammonia nitrogen concentration is detected to be 0-10 mg / L, the dosing pump is turned on by 10%; thereafter, for every 10 mg / L increase in the ammonia nitrogen concentration, the dosing pump is turned on by 10% more.

[0013] Furthermore, the wastewater treated by the denitrification reaction tower is stored in the discharge pool and discharged in compliance with standards.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention discloses a chemical dosing control system for wastewater from substrate glass flue gas. An online ammonia nitrogen analyzer installed in the flue gas raw water tank monitors the ammonia nitrogen content in the wastewater in real time and transmits the data to the dosing controller promptly. Based on the real-time monitored ammonia nitrogen concentration (fluctuating within 10-50 mg / L), the dosing controller precisely adjusts the sodium hypochlorite dosage of the dosing system. This avoids the instability in ammonia nitrogen treatment caused by reaction lag and judgment errors in traditional manual adjustments, ensuring that the reaction within the denitrification reaction tower is always in an optimal state, significantly improving the stability of ammonia nitrogen removal and making it easier to meet emission standards. Regarding dosing accuracy, compared to the crude operation of manually adjusting the dosing pump, this system achieves automation and precision in the dosing process. The dosing controller dynamically adjusts based on real-time data from the online ammonia nitrogen analyzer, matching the sodium hypochlorite dosage with the actual ammonia nitrogen content in the wastewater, effectively solving the problem of inaccurate dosage in traditional methods. This approach avoids both excessive ammonia nitrogen residue due to insufficient dosing and waste of reagents caused by excessive dosing, thus reducing reagent consumption costs while ensuring treatment effectiveness.

[0015] Furthermore, the dosing system includes a dosing pump, a storage tank, and a robotic arm. The dosing pump is equipped with a regulating valve, and the dosing controller controls the robotic arm to adjust the pump's opening. This design achieves fully automated and precise control of the dosing process: after the online ammonia nitrogen analyzer transmits real-time monitoring data to the dosing controller, the controller can precisely adjust the pump's opening by controlling the regulating valve via the robotic arm based on fluctuations in ammonia nitrogen concentration. Compared to traditional manual pump adjustment, the robotic arm's adjustment movements are more precise and stable, avoiding fatigue and judgment errors that can occur with manual operation. This results in a higher degree of matching between the pump's opening adjustment and the ammonia nitrogen content in the wastewater, further ensuring the accuracy of sodium hypochlorite dosing. Simultaneously, this method of adjusting the pump's regulating valve via a robotic arm allows for a faster response time in the dosing process. When the ammonia nitrogen content in the wastewater changes, the dosing controller can quickly issue instructions, and the robotic arm can immediately execute adjustment actions, promptly adjusting the opening of the dosing pump to ensure that the reagent concentration in the denitrification reaction tower is always within the optimal reaction range. This effectively solves the problem of unstable ammonia nitrogen treatment caused by delayed dosing, greatly improving the stability of ammonia nitrogen treatment results. Furthermore, the stable connection between the dosing pump and the storage tank ensures continuous reagent supply, while the dosing pump regulating valve provides reliable assurance for fine-tuning the pump opening. This makes the entire dosing system more reliable, reduces the probability of downtime due to equipment adjustment issues, lowers maintenance costs, and further improves the operating efficiency and economy of the entire flue gas wastewater ammonia nitrogen treatment system.

[0016] Furthermore, in the chemical dosing control system for flue gas wastewater from substrate glass production, a level gauge is installed at the top of the raw flue gas water tank, and the level gauge is connected to the dosing controller. It is also equipped with a four-point level alarm system (HH, H, L, LL). This design adds multiple safeguards to the stable operation of the system and brings significant technical benefits. The level gauge can monitor the liquid level in the raw flue gas water tank in real time and transmit the data to the dosing controller. This allows the dosing controller to not only grasp the ammonia nitrogen content information but also understand the real-time liquid level status of the raw water tank, achieving comprehensive control over key parameters at the front end of wastewater treatment. The four-point level alarm system plays a crucial role in precise level monitoring and automatic control. When the liquid level reaches point H, the raw water pump automatically starts, promptly transporting the wastewater from the raw water tank to the denitrification reaction tower, preventing wastewater overflow due to excessively high liquid levels. When the liquid level drops to point L, the raw water pump automatically stops, preventing the pump from running dry in a waterless or low-level state, reducing equipment wear, and extending the service life of the raw water pump. Meanwhile, the linkage between the level gauge and the dosing controller allows the dosing controller to combine level information with ammonia nitrogen content data to more comprehensively assess the wastewater treatment status. For example, when the level is in different ranges, the overall state of the wastewater in the raw water tank may vary. Based on this, the dosing controller can more precisely coordinate and control the operation of the dosing system, avoiding the impact of unstable raw water delivery on the reaction environment within the denitrification reaction tower, and further ensuring the stability of ammonia nitrogen treatment. In addition, the HH and LL level alarms can promptly issue extreme level warnings, facilitating early intervention by staff to prevent serious problems such as overflow or drying up of the raw water tank. This reduces the risk of system operation, improves the automation level and operational reliability of the entire flue gas wastewater dosing control system, and provides strong support for the efficient and stable operation of the system.

[0017] Furthermore, this invention discloses a method for controlling the dosing of wastewater from substrate glass flue gas. In this method, an online ammonia nitrogen analyzer periodically detects the ammonia nitrogen concentration in the flue gas raw water tank and feeds it back to the controller. The controller generates corresponding dosing pump opening commands based on the ammonia nitrogen concentration range. A robotic arm adjusts the valve opening according to the commands to add chemicals, forming a complete closed-loop control system. Specifically, the correspondence between ammonia nitrogen concentration and dosing pump opening is clearly defined. When the detected ammonia nitrogen concentration is 0-10 mg / L, the dosing pump opens by 10%. Thereafter, for every 10 mg / L increase in ammonia nitrogen concentration, the dosing pump opening increases by 10%. This quantitative correspondence provides a precise basis for dosing operations, enabling real-time and automatic adjustment of the dosing amount based on changes in ammonia nitrogen concentration. This completely changes the problems of inaccurate dosing and low matching degree with actual ammonia nitrogen concentration when manually adjusting the dosing pump in traditional methods, significantly improving dosing accuracy and ensuring a high degree of compatibility between the sodium hypochlorite dosage and the ammonia nitrogen removal requirements in the wastewater. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an embodiment of the flue gas and wastewater treatment system of the present invention; Figure 2 This is a schematic diagram of sodium hypochlorite dosing in an embodiment of the present invention.

[0020] Among them: 1- Flue gas raw water tank, 2- Raw water pump, 3- Denitrification reaction tower, 4- Ammonia nitrogen online analyzer, 5- Dosing controller, 6- Dosing pump, 7- Discharge tank, 8- Storage tank, 9- Robotic arm, 10- Dosing pump regulating valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and marked in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings: See Figures 1-2 One embodiment of the present invention provides a chemical dosing control system for wastewater from substrate glass flue gas. The system includes key equipment such as a raw flue gas water tank 1, a raw water pump 2, a denitrification reaction tower 3, an online ammonia nitrogen analyzer 4, a dosing controller 5, a dosing system, and a discharge tank 7. The raw flue gas water tank 1 serves as the initial storage and buffer area for wastewater and is connected to the raw water pump 2 via pipelines. The raw water pump 2 then transports the wastewater to the denitrification reaction tower 3 via pipelines, forming the main flow channel for wastewater treatment. The outlet of the denitrification reaction tower 3 is connected to the discharge tank 7, where the treated wastewater can be temporarily stored to ensure the stability and controllability of the subsequent discharge process. The dosing system, the core component for achieving precise dosing, consists of a dosing pump 6, a storage tank 8, and a robotic arm 9. The storage tank 8 stores treatment agents such as sodium hypochlorite and is connected to the inlet of the dosing pump 6 via a pipeline, providing a continuous supply of agents for the dosing process. The outlet of the dosing pump 6 is connected to the inlet of the denitrification reaction tower 3 via a pipeline, allowing for precise delivery of the agents to the reaction area. To achieve fine adjustment of the dosing amount, a dosing pump regulating valve 10 is specifically installed on the dosing pump 6. The dosing controller 5 establishes a close signal connection with the robotic arm 9, enabling it to send precise control commands to the robotic arm 9. The robotic arm 9 then operates the dosing pump regulating valve 10 according to these commands, thereby adjusting the opening of the dosing pump 6 and ultimately achieving precise dosing to the denitrification reaction tower 3. The level gauge installed on the top of the flue gas raw water tank 1 is an important auxiliary device to ensure the stable operation of the system. This level gauge is connected to the dosing controller 5 and can transmit the real-time monitored level data to the dosing controller 5. Simultaneously, the level gauge is equipped with a four-point level alarm system: HH (high), H (high), L (low), and LL (low). HH, H (high), L (low), and LL (low) are set according to actual conditions and represent the level values. When the level reaches point H, it means that the wastewater storage in the raw water tank is sufficient, and the dosing controller 5 will issue a command to start the raw water pump 2 to begin transporting wastewater. When the level drops to point L, it indicates that the wastewater storage in the raw water tank is low, and the dosing controller 5 will instruct the raw water pump 2 to stop. This avoids the raw water pump 2 operating in a low-level or empty tank state, ensuring stable and orderly wastewater transport and reducing equipment wear and tear. Meanwhile, the flue gas wastewater in the flue gas raw water tank 1 is periodically tested by the online ammonia nitrogen analyzer 4, which measures the ammonia nitrogen content every hour. The measurement process is accurate and reliable, and the measurement data is fed back to the dosing controller 5 in real time and accurately, providing key information for dosing control. The dosing controller 5 has a clear and strict dosing rule set up inside, forming a scientific dosing logic: when the ammonia nitrogen content is between 0-10 mg / L, the robotic arm 9 controls the dosing pump regulating valve 10 to open by 10%; when the ammonia nitrogen content is between 10-20 mg / L, it opens by 20%; when it is between 20-30 mg / L, it opens by 30%, and so on, ensuring that the dosage and ammonia nitrogen content always maintain a reasonable ratio. After receiving the instruction from the dosing controller 5, the dosing system responds quickly and uses the robotic arm 9 to precisely adjust the dosing pump regulating valve 10, thereby strictly controlling the dosage. This ensures that the reagent from the dosing pump 6 and the flue gas wastewater from the raw water pump 2 are fully mixed and reacted in the denitrification reaction tower 3, effectively removing ammonia nitrogen from the wastewater. The treated wastewater is then stored in the discharge tank 7, ultimately achieving compliant discharge. By implementing this system, and by installing a robotic arm on the dosing pump and setting up a sophisticated control program, the accuracy of sodium hypochlorite dosing has been greatly improved. Compared with traditional manual adjustment of the dosing pump, this not only reduces human error but also allows for flexible adjustment of the dosing amount based on the actual ammonia nitrogen content, significantly saving on chemicals. The system is designed for a hot-end furnace line with a drainage capacity of approximately 5m³. 3 / h, Phase I drainage capacity 1000m³ 3Taking a production scale of / d as an example: When manually adjusting the dosing pump in the traditional method, it is usually set at a fixed 40% scale. When the ammonia nitrogen content of the raw water is 40-50 mg / L, 1.1t of sodium hypochlorite is required per day. However, with the system of this invention, the dosing pump scale can be flexibly adjusted according to the ammonia nitrogen content. In actual working conditions where the ammonia nitrogen content of the water is about 20% of the day at 50 mg / L, 30% at 30 mg / L, and 50% below 20 mg / L, accurate statistics show that only 0.64t of sodium hypochlorite is required per day, saving 0.46t compared to the traditional method. The chemical usage rate is reduced by about 42%, which improves the treatment effect and significantly reduces the operating cost.

[0028] The working process of this invention is as follows: The flue gas wastewater from the production line first enters the collection tank 1 for storage. When the liquid level reaches a certain height, the raw water pump 2 is turned on, and the flue gas wastewater is lifted to the denitrification reaction tower 3 through the raw water pump 2. At the same time, the online ammonia nitrogen analyzer 4 installed in the raw water tank starts to measure the ammonia nitrogen content in the raw water tank. The measured ammonia nitrogen content is fed back to the control program 5. The control program instructs the robotic arm 9 to adjust the size of the sodium hypochlorite dosing pump. After the flue gas wastewater and sodium hypochlorite in the denitrification reaction tower react, the ammonia nitrogen in the water is removed. The treated water enters the discharge tank 7 and is stored until a certain liquid level is reached before being discharged.

[0029] An embodiment of the present invention provides a method for controlling the chemical dosing of wastewater from substrate glass flue gas, comprising the following steps: The first step is to start the raw water pump 2 when the liquid level in the flue gas raw water tank 1 reaches level H, and transport the wastewater in the flue gas raw water tank 1 to the denitrification reaction tower 3 to provide a stable wastewater source for subsequent ammonia nitrogen treatment. The second step involves the online ammonia nitrogen analyzer 4 periodically detecting the ammonia nitrogen concentration in the flue gas raw water tank 1 and feeding back the detected data to the controller 5 in real time, providing accurate concentration data for dosing control. Third, controller 5 generates a dosing pump opening command according to the received ammonia nitrogen concentration data and the set rules. The specific rules are as follows: when the detected ammonia nitrogen concentration is between 0-10 mg / L, the dosing pump opens by 10%; thereafter, for every 10 mg / L increase in the detected ammonia nitrogen concentration, the opening degree of the dosing pump increases by 10% accordingly, thereby achieving precise matching between the dosing amount and the ammonia nitrogen concentration. In the fourth step, after receiving the dosing pump opening command, the robotic arm 9 precisely adjusts the opening of the dosing pump valve according to the command, and adds an appropriate amount of reagent to the denitrification reaction tower 3 to ensure that the reagent and wastewater can fully react in the denitrification reaction tower 3. Finally, the wastewater treated by the denitrification reaction tower 3 enters the discharge pool 7 for storage, and will be discharged only after meeting the discharge standards, thus ensuring the safety and compliance of wastewater discharge.

[0030] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A chemical dosing control system for flue gas and wastewater from substrate glass, characterized in that, It includes a flue gas raw water tank (1), a raw water pump (2), a denitrification reaction tower (3), an online ammonia nitrogen analyzer (4), a dosing controller (5), and a dosing system; The flue gas raw water tank (1), raw water pump (2) and denitrification reaction tower (3) are connected in sequence; The flue gas raw water tank (1) is equipped with an online ammonia nitrogen analyzer (4); the online ammonia nitrogen analyzer (4) is connected to a dosing controller (5), which is connected to a dosing system; the dosing system is connected to the inlet of the denitrification reaction tower (3); the dosing system includes a dosing pump (6) and a robotic arm (9), and the dosing controller (5) is electrically connected to the robotic arm (9); the dosing pump (6) is connected to the denitrification reaction tower (3); the dosing controller (5) controls the robotic arm (9) to adjust the opening of the dosing pump (6) to add chemicals to the denitrification reaction tower (3).

2. The substrate glass flue gas wastewater dosing control system according to claim 1, characterized in that, The dosing system also includes a storage tank (8); the inlet of the dosing pump (6) is connected to the storage tank (8), and the outlet of the dosing pump (6) is connected to the inlet of the denitrification reaction tower (3).

3. The substrate glass flue gas wastewater dosing control system according to claim 1, characterized in that, The dosing pump (6) is equipped with a dosing pump regulating valve (10). The dosing controller (5) controls the robotic arm (9) to adjust the dosing pump regulating valve (10) on the dosing pump (6) to adjust the opening of the dosing pump (6).

4. The substrate glass flue gas wastewater dosing control system according to claim 1, characterized in that, A level gauge is installed on the top of the flue gas raw water tank (1).

5. The substrate glass flue gas wastewater dosing control system according to claim 4, characterized in that, The level gauge is connected to the dosing controller (5).

6. The substrate glass flue gas wastewater dosing control system according to claim 5, characterized in that, The level gauge is equipped with a four-point level alarm system (HH, H, L, LL). When the level reaches H, the raw water pump (2) is turned on, and when the level reaches L, the raw water pump (2) is turned off.

7. The substrate glass flue gas wastewater dosing control system according to claim 1, characterized in that, The outlet of the denitrification reaction tower (3) is connected to an exhaust pool (7).

8. A method for controlling the chemical dosing of wastewater from substrate glass flue gas, characterized in that, Includes the following steps: When the flue gas raw water tank (1) reaches the H level, start the raw water pump (2) to transport wastewater to the denitrification reaction tower (3). The online ammonia nitrogen analyzer (4) periodically detects the ammonia nitrogen concentration in the flue gas raw water tank (1) and feeds it back to the controller (5); The controller (5) generates a dosing pump opening command based on the ammonia nitrogen concentration range; The robotic arm (9) adjusts the opening of the dosing pump valve according to the dosing pump opening command and adds chemicals to the denitrification reaction tower (3).

9. The method for controlling the chemical dosing of substrate glass flue gas wastewater according to claim 8, characterized in that, The controller (5) generates a dosing pump opening command based on the ammonia nitrogen concentration range, specifically: When the ammonia nitrogen concentration is detected to be 0-10 mg / L, the dosing pump is turned on by 10%; thereafter, for every 10 mg / L increase in the ammonia nitrogen concentration, the dosing pump is turned on by 10% more.

10. The method for controlling the chemical dosing of substrate glass flue gas wastewater according to claim 8, characterized in that, Wastewater treated by the denitrification reaction tower (3) is stored in the discharge pool (7) and discharged in compliance with standards.

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