Novel heating control mode of thermal deaerator of converter flue gas waste heat boiler

Abstract

The invention discloses a novel heating control mode for a thermal deaerator of a converter flue gas waste heat boiler, which relates to the technical field of waste heat boiler equipment and comprises the following main steps of inspection before operation, water feeding operation, heating preparation, heating control, operation monitoring and heating ending and shutdown. Parameters such as water level, water replenishing quantity, a regulating valve, temperature detection and a flow meter are controlled through the deaerator, heat of circulating return water of a movable smoke hood, an oxygen lance opening and a discharging opening of the boiler and cooling water quantity during water replenishing of the deaerator are calculated, temperature rise of added soft water is calculated, and meanwhile, a PLC program is matched, so that the temperature of the boiler is increased. According to the method, the water supplementing amount during smelting and the steam heating amount of water supplementing in the non-smelting period are automatically controlled, a heating adjusting valve and a water supplementing adjusting valve of the deoxygenization water device are controlled, temperature control over the deoxygenization device is achieved, the deoxygenization device reaches the optimal deoxygenization temperature, and the problem that the optimal deoxygenization temperature cannot be guaranteed due to the discontinuity of converter steelmaking is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat boiler equipment, and in particular to a novel heating control method for a thermal deaerator of a converter flue gas waste heat boiler. Background Art

[0002] A converter waste heat boiler (HRSG) is a highly efficient and energy-saving boiler. Its operating principle is to pass the high-temperature flue gas from steelmaking through the HRSG, converting the heat energy into steam energy for power generation or heating purposes in other industries. The new HRSG is a highly energy-efficient device primarily used to recover waste heat generated during the converter steelmaking process, converting it into steam or hot water, thereby achieving efficient energy utilization. During the converter steelmaking process, high-temperature exhaust gas enters the HRSG through the flue. The heat in the exhaust gas is absorbed by the water in the boiler, vaporizing the water to produce steam. This steam can be used to generate electricity or meet other thermal needs of the factory, such as heating or driving mechanical equipment.

[0003] A deaerator is a crucial component of boiler operation. Its primary function is to remove gases such as oxygen, carbon dioxide, nitrogen, and hydrogen from the softened water in the waste heat boiler (HRSG), preventing corrosion of the feedwater pipes, condenser, and boiler, and thus extending boiler life. In some designs, the converter HRSG and deaerator can be integrated, utilizing heat from the converter HRSG to assist the deaerator and reduce energy consumption. This integrated design offers significant economic and environmental benefits in industrial applications.

[0004] A search on the patent website revealed that application number 202310919259.5 discloses a control method, device, and electronic device for a heating furnace deaerator. The present invention rapidly replenishes water when the deviation between the target liquid level and the actual liquid level of the deaerator is large, and slowly replenishes water when the deviation between the target liquid level and the actual liquid level is small, thereby ensuring stable operation of the entire vaporization system and achieving deoxygenation efficiency.

[0005] However, the waste heat boiler and deaerator in the above patent have the following deficiencies when used: the main heat source of the thermal deaerator of the waste heat boiler of the converter steelmaking is the circulating return water heat source of the movable smoke hood, oxygen lance and discharge port during the converter steelmaking. However, due to the non-continuous nature of converter steelmaking, that is, the intermittent heat generation, the optimal deoxidation temperature cannot be guaranteed during the deaerator water replenishment process or the smelting process, which reduces the working quality and work efficiency of the deaerator.

[0006] In view of the above problems, a new heating control method for the thermal deaerator of the converter flue gas waste heat boiler is proposed. Summary of the Invention

[0007] The object of the present invention is to provide a novel heating control method for a thermal deaerator of a converter flue gas waste heat boiler. By adopting this method, the problem that the main heat source of the thermal deaerator of the converter steelmaking waste heat boiler is the circulating return water heat source of the movable smoke hood, oxygen lance and discharge port during converter steelmaking is solved, but due to the non-continuous nature of converter steelmaking, that is, the intermittent heat generation, the optimal deoxidation temperature cannot be guaranteed during the deaerator water replenishment process or the smelting process, thereby reducing the working quality and work efficiency of the deaerator.

[0008] To achieve the above object, the present invention provides the following technical solution: a novel heating control method for a thermal deaerator of a converter flue gas waste heat boiler, comprising the following main steps;

[0009] Step 1: Check before starting to make sure that the boiler, deaerator, thermal system, water system, PLC controller and other main components are in normal condition;

[0010] Step 2: Water filling operation. After the condensate system and deaerator flushing water quality are qualified, fill the deaerator with water to the appropriate starting water level. The specific value can be set according to the specific requirements of the equipment;

[0011] Step 3: Heating preparation: start the deaerator body and main working components such as the circulation pump, establish the circulating water system, and prepare to input auxiliary steam to the deaerator for heating;

[0012] Step 4: Heating control: Add auxiliary steam to the deaerator for heating, maintain the deaerator at appropriate pressure and temperature, and control the temperature according to the boiler requirements. At the same time, the deaerator needs to be stabilized to prevent it from shaking; the temperature rise should be controlled within a certain range to avoid adverse effects on the equipment;

[0013] Step 5: Operation monitoring, observe the temperature of the deaerator to ensure that it is stable at the predetermined temperature, check whether the valves connected to the deaerator are open to ensure that the gas can be discharged smoothly, and regularly check the operation of the deaerator to ensure its normal operation;

[0014] Step 6: End of heating and shutdown. After the heating is completed or when shutdown is required, close the corresponding valves and switches according to the operating procedures to avoid wasting energy or causing equipment damage. The operator calculates the changes in the deaeration tank temperature before and after smelting in order to stabilize the temperature during the subsequent boiler smelting process so that the boiler steam flow is equal to the actual heating heat required for water replenishment.

[0015] Preferably, in step three, when in use, the boiler is first put into use, and the exhaust pipe assembly of the boiler is discharged into the deaeration water tank, so that the steam heats the softened water in the deaeration water tank, and then the circulation pump is started, and the circulation pump transports the softened water to the deaeration water tank through the drain pipe assembly. After the softened water enters the deaeration water tank, the steam heats the deaeration water tank and deoxygenates it.

[0016] Preferably, in step 4, when the liquid level of the deaerated water tank is lower than a set value, the PLC controller starts the pump through the frequency converter, and then the PLC controller controls the pump through the frequency converter to supply water to the deaerated water tank.

[0017] Preferably, in step 4, when the liquid level in the deaeration water tank reaches a set value, the PLC controller controls the pump through the frequency converter to stop supplying water to the deaeration water tank.

[0018] Preferably, in step five, when the temperature sensor detects that the temperature of the softened water in the deaeration tank is lower than the set value, the temperature sensor controls the opening of the exhaust valve through the PLC controller to ensure the feed amount of steam entering the deaeration tank, ensure the temperature of the softened water in the deaeration tank, and ensure the deoxygenation efficiency.

[0019] Preferably, in step six, during the smelting period of the waste heat boiler, the heat of the circulating return water of the movable smoke hood, oxygen lance and discharge port is calculated by the change in the temperature of the deaerator water tank before and after smelting, and the flow of the deaerator water tank water supply valve is controlled by the PLC program to stabilize the temperature during the smelting process.

[0020] Preferably, in step six, during the non-smelting period of the waste heat boiler, when the water level in the deaeration water tank is low and water replenishment is required, the steam heat required for heating is calculated by the replenishment water flow and the replenishment water temperature, the steam pressure is adjusted by controlling the heating steam pressure regulating valve through the PLC program, and the heating steam heat of the heating steam flow regulating valve is controlled by the PLC program to adjust the steam flow to be equal to the actual heating heat required for water replenishment.

[0021] Preferably, a new type of heating control system for a thermal deaerator of a converter flue gas waste heat boiler includes a deaeration water tank and a PLC controller arranged on one side of the deaeration water tank, a tank heating pipe on one side of the deaeration water tank, a movable smoke hood on one side of the deaeration water tank, a circulating pump between the movable smoke hood and the deaeration water tank, a circulating water inlet pipe between the circulating pump and the deaeration water tank, a circulating water valve on one side of the circulating water inlet pipe, and the deaeration water tank and the movable smoke hood are connected through a circulating water return pipe and are in communication with each other.

[0022] Preferably, a deaerator water tank feed pipe, a deaerator head exhaust pipe and a steam pipe are provided on one side of the box heating pipe, and the box heating pipe is respectively interconnected with the steam pipe, the deaerator head exhaust pipe and the deaerator water tank feed pipe; a deaerator water tank feed valve is provided on one side of the deaerator water tank feed pipe, an exhaust valve is provided on one side of the deaerator head exhaust pipe, and a heating steam pressure regulating valve, a heating steam flow regulating valve and a steam pipe check valve are provided on one side of the steam pipe.

[0023] Preferably, a temperature sensor is provided on one side of the deaeration water tank, and the temperature sensor is electrically connected to the PLC controller. A frequency converter is provided on one side of the circulation pump, and the frequency converter is electrically connected to the PLC controller. A liquid level gauge is provided on one side of the deaeration water tank, and the liquid level gauge is electrically connected to the PLC controller.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. This application proposes a novel heating control method for a thermal deaerator of a converter flue gas waste heat boiler. The deaerator of the present invention is used in a boiler system to remove oxygen and other gases from the boiler feed water, prevent corrosion of the condenser, feed water pipes and important components of the boiler equipment, and extend the life of the boiler equipment. The deaerator itself is also a hybrid heater in the feed water heat recovery heating system, which plays a role in heating the feed water and increasing the feed water temperature. The heating control method of the present invention, with the cooperation of the entire component, enables the converter waste heat boiler and the deaerator to be integrated together, using the heat of the converter waste heat boiler to assist the deaerator in its operation, thereby reducing energy consumption. This integrated design has certain economic and environmental benefits in industrial applications.

[0026] 2. The design of the present invention mainly calculates the heat of the circulating return water from the boiler's movable smoke hood, oxygen lance, and discharge port, as well as the amount of cooling water during deaerator water replenishment, and adds soft water temperature rise calculations by controlling parameters such as the deaerator water level, water replenishment volume, regulating valve, temperature detection, and flow meter. At the same time, the PLC program is used to automatically control the water replenishment volume during smelting and the steam heating volume for water replenishment during non-smelting periods, and to control the heating regulating valve and water replenishment regulating valve of the deaerator to achieve temperature control of the deaerator, allowing the deaerator to reach the optimal deoxidation temperature, thereby solving the problem that the optimal deoxidation temperature cannot be guaranteed due to the discontinuity of converter steelmaking.

[0027] 3. The present invention controls the heating regulating valve and the water supply regulating valve of the deaerator to achieve the optimal deoxidation temperature of the deaerator, thereby solving the problem that the discontinuity of converter steelmaking cannot ensure the optimal deoxidation temperature, thereby achieving the purpose of prolonging the life of the boiler. In addition, the present invention can simplify the operation, reduce the enterprise's management and control costs, and the modification amount is small, and the modification is easy without significantly increasing the enterprise's costs. At the same time, the maintenance during the operation of the device is also simple, and it is safe and reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the heating control system of the thermal deaerator of the converter flue gas waste heat boiler of the present invention.

[0029] In the figure: 1. Deaerator head exhaust pipe; 2. Exhaust valve; 3. Tank heating pipe; 4. Water tank water supply valve; 5. Deaerator water tank water supply pipe; 6. Deaerator water tank body; 7. Circulating water valve; 8. Circulating water inlet pipe; 9. Circulating pump; 10. Movable smoke hood; 11. Circulating water return pipe; 12. First steam pipe; 13. Heating steam pressure regulating valve; 14. Heating steam flow regulating valve; 15. Steam pipe check valve. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0032] Combine Figure 1 A novel heating control method for a thermal deaerator of a converter flue gas waste heat boiler includes the following main steps:

[0033] Step 1: Check before starting to make sure that the boiler, deaerator, thermal system, water system, PLC controller and other main components are in normal condition;

[0034] Step 2: Water filling operation: After the condensate system and deaerator flushing water quality are qualified, fill the deaerator with water to the starting water level of about 1850mm or 2000mm. The specific value can be set according to the specific requirements of the equipment;

[0035] Step 3: Heating preparation, start the main working components such as the deaerator body and the circulation pump 9, establish the circulating water system, and prepare to input auxiliary steam to the deaerator for heating;

[0036] Step 4: Heating control: Add auxiliary steam to the deaerator for heating, and maintain the deaerator at appropriate pressure and temperature, 0.02Mpa, 104°C, in accordance with the temperature control requirements of the boiler. At the same time, the deaerator needs to be stabilized to prevent it from shaking; the temperature rise should be controlled within a certain range, no more than 1.5°C / min, to avoid adverse effects on the equipment;

[0037] Step 5: Operation monitoring, observe the temperature of the deaerator to ensure that it is stable at the predetermined temperature, check whether the valves connected to the deaerator are open to ensure that the gas can be discharged smoothly, and regularly check the operation of the deaerator to ensure its normal operation;

[0038] Step 6: End of heating and shutdown. After the heating is completed or when shutdown is required, close the corresponding valves and switches according to the operating procedures to avoid wasting energy or causing equipment damage. The operator calculates the change in the temperature of the deaerator water tank body 6 before and after smelting in order to stabilize the temperature during the subsequent boiler smelting process so that the boiler steam flow is equal to the actual heating heat required for water replenishment.

[0039] A control system for a new type of thermal deaerator for a converter flue gas waste heat boiler includes a deaerator water tank body 6 and a PLC controller arranged on one side of the deaerator water tank body 6, a tank heating tube 3 on one side of the deaerator water tank body 6, a movable smoke hood 10 on one side of the deaerator water tank body 6, a circulating pump 9 between the movable smoke hood 10 and the deaerator water tank body 6, a circulating water inlet pipe 8 between the circulating pump 9 and the deaerator water tank body 6, a circulating water valve 7 on one side of the circulating water inlet pipe 8, and the deaerator water tank body 6 and the movable smoke hood 10 are connected and communicated with each other through a circulating water return pipe 11.

[0040] A deaerator water tank feed pipe 5, a deaerator head exhaust pipe 1 and a first steam pipe 12 are provided on one side of the box heating pipe 3. The box heating pipe 3 is respectively interconnected with the first steam pipe 12, the deaerator head exhaust pipe 1 and the deaerator water tank feed pipe 5; a water tank feed valve 4 is provided on one side of the deaerator water tank feed pipe 5, an exhaust valve 2 is provided on one side of the deaerator head exhaust pipe 1, and a heating steam pressure regulating valve 13, a heating steam flow regulating valve 14 and a steam pipe check valve 15 are provided on one side of the first steam pipe 12.

[0041] A temperature sensor is provided on one side of the deaeration tank body 6, and the temperature sensor is electrically connected to the PLC controller. A frequency converter is provided on one side of the circulation pump 9, and the frequency converter is electrically connected to the PLC controller. A liquid level gauge is provided on one side of the deaeration tank body 6, and the liquid level gauge is electrically connected to the PLC controller.

[0042] The present invention will be further described below with reference to the embodiments.

[0043] Example 1:

[0044] When in use, the boiler is first put into use, and the exhaust pipe assembly of the boiler is discharged into the deaeration tank body 6, so that the steam heats the softened water in the deaeration tank body 6, and then the circulation pump 9 is started, and the circulation pump 9 transports the soft water to the deaeration tank body 6 through the drainage pipe assembly. After the softened water enters the deaeration tank body 6, the steam heats the deaeration tank body 6 for deoxygenation; when the liquid level of the deaeration tank body 6 is lower than the set value, the PLC controller starts the pump through the frequency converter, and then the PLC controls The controller controls the pump through the frequency converter to supply water to the deaerator water tank body 6; when the liquid level of the deaerator water tank body 6 reaches the set value, the PLC controller controls the pump through the frequency converter to stop supplying water to the deaerator water tank body 6; when the temperature sensor detects that the temperature of the softened water in the deaerator water tank body 6 is lower than the set value, the temperature sensor controls the opening of the exhaust valve 2 through the PLC controller to ensure the feed amount of steam entering the deaerator water tank body 6, ensure the temperature of the softened water in the deaerator water tank body 6, and ensure the deoxygenation efficiency.

[0045] Example 2:

[0046] A regulating valve is installed on the exhaust pipeline, and a temperature sensor is installed on the deaerator tank. Both the regulating valve and the temperature sensor are electrically connected to the PLC controller. When the temperature sensor detects that the softened water temperature in the deaerator tank is lower than the set value, the temperature sensor sends an electrical signal to the PLC controller, which controls the opening of the regulating valve, allowing steam to enter the deaerator head through the heating pipeline to heat the softened water. This helps to promptly increase the temperature of the soft water entering the deaerator head, thereby ensuring deoxygenation efficiency.

[0047] Example 3:

[0048] Smelting period: calculate the heat of circulating water from the active smoke hood, oxygen lance and feeding port by the temperature change of deaerator water tank 4 before and after smelting; for example: the control water volume of deaerator water tank 4 is 43.6m 3 After the smelting is completed, the temperature rises by 3°C. The smelting time is 10 minutes. The heat of the circulating water return is 43.6*3*1000*4.186 / 10*60=3285172.8KJ / h. According to the temperature of the deaerator water tank water supply pipe 5 at 35°C, the water supply required for the deaerator water tank is 3285172.8 / 104-35 / 4.186 / 1000=11.37m 3 / h, the flow rate of the water tank water supply valve 4 is controlled by the PLC program to be 11.37m 3 / h, to stabilize the temperature during the smelting process.

[0049] Non-smelting period: When the water level in the deaerator tank 4 is low and water needs to be replenished, the steam heat required for heating is calculated based on the replenishment flow and temperature; for example: the replenishment flow is 60m 3 / h, and the feed water temperature is 35°C, the required heating steam heat is 104-35*4.186*60=17330040KJ / h. The PLC program controls the heating steam pressure regulating valve 13 to adjust the steam pressure to 0.8MPa, and its enthalpy value is 2768.86KJ / Kg. The PLC program controls the heating steam flow regulating valve 14 to adjust the heating steam heat to 17330040 / 2768.86 / 1000=6.26t / h, that is, the steam flow is adjusted to be equal to the actual heating heat required for feed water.

[0050] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0051] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A new type of heating control method for the thermal deaerator of the converter flue gas waste heat boiler, characterized in that: The main steps include: Step 1: Check before starting to make sure that the boiler, deaerator, thermal system, water system, PLC controller and other main components are in normal condition; Step 2: Water filling operation: After the condensate system and deaerator flushing water quality are qualified, fill the deaerator with water to the starting water level (about 1850mm or 2000mm, the specific value can be set according to the specific requirements of the equipment); Step 3: heating preparation, start the main working components such as the deaerator body and the circulation pump (9), establish the circulating water system, and prepare to input auxiliary steam to the deaerator for heating; Step 4: Heating control: Add auxiliary steam to the deaerator for heating, and maintain the deaerator at appropriate pressure and temperature, pressure 0.02Mpa, temperature 104℃, according to the temperature control required by the boiler. At the same time, the deaerator needs to be stabilized to prevent it from shaking; The temperature rise should be controlled within a certain range, no more than 1.5℃ / min, to avoid adverse effects on the equipment; Step 5: Operation monitoring, observe the temperature of the deaerator to ensure that it is stable at the predetermined temperature, check whether the valves connected to the deaerator are open to ensure that the gas can be discharged smoothly, and regularly check the operation of the deaerator to ensure its normal operation; Step 6: Heating end and shutdown. After heating is completed or when shutdown is required, close the corresponding valves and switches according to the operating procedures to avoid wasting energy or causing equipment damage. The operator calculates the temperature change of the deaeration water tank body (6) before and after smelting in order to stabilize the temperature during the subsequent boiler smelting process so that the boiler steam flow is equal to the actual heating heat required for water replenishment.

2. The heating control method of the novel converter flue gas waste heat boiler thermal deaerator according to claim 1 is characterized by: In step three, when in use, the boiler is first put into use, and the exhaust pipe assembly of the boiler is discharged into the deaeration water tank body (6), so that the steam heats the softened water in the deaeration water tank body (6). Then, the circulation pump (9) is started, and the circulation pump (9) transports the softened water into the deaeration water tank body (6) through the drainage pipe assembly. After the softened water enters the deaeration water tank body (6), the steam heats the deaeration water tank body (6) to deoxygenate.

3. The heating control method of the novel converter flue gas waste heat boiler thermal deaerator according to claim 1 is characterized by: In step 4, when the liquid level of the deaeration water tank body (6) is lower than the set value, the PLC controller starts the pump through the frequency converter, and then the PLC controller controls the pump through the frequency converter to supply water to the deaeration water tank body (6).

4. The heating control method of the novel converter flue gas waste heat boiler thermal deaerator according to claim 1 is characterized by: In step 4, when the liquid level of the deaeration water tank body (6) reaches the set value, the PLC controller controls the pump through the frequency converter to stop supplying water to the deaeration water tank body (6).

5. The heating control method of the novel converter flue gas waste heat boiler thermal deaerator according to claim 1 is characterized by: In step 5, when the temperature sensor detects that the temperature of the softened water in the deaerator water tank body (6) is lower than the set value, the temperature sensor controls the opening of the exhaust valve (2) through the PLC controller to ensure the feed amount of steam into the deaerator water tank body (6), ensure the temperature of the softened water in the deaerator water tank body (6), and ensure the deoxygenation efficiency.

6. The heating control method of the novel converter flue gas waste heat boiler thermal deaerator according to claim 1 is characterized by: In step six, during the smelting period of the waste heat boiler, the heat of the circulating return water of the movable smoke hood (10), oxygen lance mouth, and discharge port is calculated by the change in the temperature of the deaerator water tank body (6) before and after smelting, and the flow rate of the water tank water supply valve (4) is controlled by the PLC program to stabilize the temperature during the smelting process.

7. The heating control method of the novel converter flue gas waste heat boiler thermal deaerator according to claim 1 is characterized by: In step six, when the water level of the deaerator water tank body (6) is low and water needs to be replenished during the non-smelting period of the waste heat boiler, the steam heat required for heating is calculated based on the replenishment water flow and the replenishment water temperature, and the heating steam pressure regulating valve (13) is controlled by the PLC program to adjust the steam pressure to 0.8 MPa. The heating steam heat of the heating steam flow regulating valve (14) is controlled by the PLC program to adjust the steam flow to be equal to the actual heating heat required for water replenishment.

8. The control system of a novel converter flue gas waste heat boiler thermal deaerator according to claim 1 is characterized by: The method applied to any one of claims 1 to 7 comprises a deaeration tank body (6) and a PLC controller arranged on one side of the deaeration tank body (6), a tank heating pipe (3) on one side of the deaeration tank body (6), a movable smoke hood (10) provided on one side of the deaeration tank body (6), a circulation pump (9) provided between the movable smoke hood (10) and the deaeration tank body (6), a circulating water inlet pipe (8) provided between the circulating pump (9) and the deaeration tank body (6), a circulating water valve (7) provided on one side of the circulating water inlet pipe (8), and the deaeration tank body (6) and the movable smoke hood (10) are connected and communicated with each other through a circulating water return pipe (11).

9. The novel converter flue gas waste heat boiler thermal deoxidation control system according to claim 1 is characterized by: A deaeration water tank water supply pipe (5), a deaeration head exhaust pipe (1) and a first steam pipe (12) are provided on one side of the box heating pipe (3); the box heating pipe (3) is respectively connected to the first steam pipe (12), the deaeration head exhaust pipe (1) and the deaeration water tank water supply pipe (5); a water tank water supply valve (4) is provided on one side of the deaeration water tank water supply pipe (5); an exhaust valve (2) is provided on one side of the deaeration head exhaust pipe (1); and a heating steam pressure regulating valve (13), a heating steam flow regulating valve (14) and a steam pipe check valve (15) are provided on one side of the first steam pipe (12).

10. The novel converter flue gas waste heat boiler thermal deoxidation control system according to claim 1 is characterized by: A temperature sensor is provided on one side of the deaeration water tank body (6), and the temperature sensor is electrically connected to the PLC controller. A frequency converter is provided on one side of the circulation pump (9), and the frequency converter is electrically connected to the PLC controller. A liquid level meter is provided on one side of the deaeration water tank body (6), and the liquid level meter is electrically connected to the PLC controller.

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