An adjustable low-nitrogen combustion control system for a coal-fired power plant boiler

Abstract

The utility model discloses a kind of adjustable low-nitrogen combustion control system of coal-fired power plant boiler, it is related to coal-fired power plant boiler equipment field, main purpose is to provide a kind of adjustable low-nitrogen combustion control system of coal-fired power plant boiler capable of reducing the emission concentration of nitrogen oxides.The main technical scheme of the utility model is as follows: a kind of adjustable low-nitrogen combustion control system of coal-fired power plant boiler, comprising: furnace body, the side of furnace body is provided with nozzle component and oxygen supply component;Gas supply component, one end of first gas supply pipeline is connected to nozzle component, one end of second gas supply pipeline is connected to first gas supply pipeline, and the other end is connected to oxygen supply component;Exhaust component, exhaust pipe is connected to exhaust treatment component, one end of circulating pipeline is connected to exhaust pipe, and the other end is connected to first gas supply pipeline;Sensor component, sensor component is respectively arranged in furnace body, exhaust pipe, first gas supply pipeline and second gas supply pipeline.The utility model is mainly used for power supply.

Description

Technical Field

[0001] This utility model relates to the field of coal-fired power plant boiler equipment, and in particular to an adjustable low-NOx combustion control system for coal-fired power plant boilers. Background Technology

[0002] A coal-fired power plant boiler refers to a medium-to-large-sized boiler in a power plant that provides a specified quantity and quality of steam to the steam turbine. It is one of the main thermal equipment in a thermal power plant. It is usually matched with a steam turbine generator set of a certain capacity and is mainly used for power generation, but in some special cases, it can also be used for external heat supply.

[0003] In existing coal-fired power plant boilers, materials are injected into the boiler through nozzles. To improve combustion efficiency, the materials are mixed with air before being injected. However, since the materials are usually pulverized coal, increasing the amount of pulverized coal injected leads to incomplete combustion, resulting in the production of large amounts of nitrogen oxides during combustion. This causes significant fluctuations in nitrogen oxide emissions in the flue gas. The amount of ammonia subsequently injected is closely related to the amount of nitrogen oxides in the flue gas, making it difficult for personnel to quickly determine the amount of ammonia injected. This leads to inaccurate judgments regarding the usage of subsequent denitrification equipment, resulting in significant waste of ammonia and raw materials for the denitrification equipment. Furthermore, the flue gas after denitrification fails to meet environmental protection requirements, causing environmental pollution. Utility Model Content

[0004] In view of this, the present invention provides an adjustable low-NOx combustion control system for a coal-fired power plant boiler, the main purpose of which is to provide an adjustable low-NOx combustion control system for a coal-fired power plant boiler that can reduce the emission concentration of nitrogen oxides.

[0005] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0006] This utility model provides an adjustable low-NOx combustion control system for a coal-fired power plant boiler, the system comprising:

[0007] The furnace body has a nozzle component and an oxygen supply component on one side, and the furnace body has a flue gas exhaust pipe.

[0008] An air supply component, comprising a first air supply pipe and a second air supply pipe, wherein one end of the first air supply pipe is connected to the nozzle component, one end of the second air supply pipe is connected to the first air supply pipe, and the other end is connected to the oxygen supply component;

[0009] An exhaust system includes a circulation pipe and an exhaust gas treatment component. The exhaust pipe is connected to the exhaust gas treatment component, and one end of the circulation pipe is connected to the exhaust pipe, while the other end is connected to the first gas supply pipe.

[0010] The sensor components are respectively disposed in the furnace body, the flue gas duct, the first gas supply duct and the second gas supply duct.

[0011] Furthermore, the nozzle component includes a nozzle body, an ignition oil gun, an oil nozzle, and a pulverized coal pipeline. The nozzle body has a nozzle opening, the ignition oil gun is mounted on the nozzle body, one end of the ignition oil gun extends into the nozzle opening, the pulverized coal pipeline is disposed inside the nozzle body, one end of the pulverized coal pipeline is connected to the first gas supply pipeline, and the oil nozzle is inserted into the pulverized coal pipeline and extends into the nozzle opening.

[0012] Furthermore, the nozzle component also includes an inner secondary air duct, an outer secondary air duct, and a cooling duct. The inner secondary air duct extends into the pulverized coal duct, the cooling duct is disposed outside the pulverized coal duct and extends into the nozzle opening, and the outer secondary air duct is disposed outside the inner secondary air duct and extends into the nozzle opening.

[0013] Furthermore, the nozzle component also includes a venturi tube and a secondary air blade, the venturi tube being disposed inside the pulverized coal pipeline and the secondary air blade being disposed outside the pulverized coal pipeline.

[0014] Furthermore, the nozzle component also includes a regulating valve, which is respectively disposed on the oil nozzle and the pulverized coal pipeline.

[0015] Furthermore, a control system is provided, which is connected to each of the regulating valves and each of the sensor components.

[0016] Furthermore, the exhaust gas treatment component includes an ammonia supply component and a denitrification component, with one end of the ammonia supply component extending into the exhaust pipe and the denitrification component connected to the other end of the exhaust pipe.

[0017] Furthermore, the ammonia supply component includes an ammonia supply pipe, a mixer, and multiple ammonia injectors. The ammonia injectors are disposed inside the flue gas pipe, with one end of the ammonia injector connected to the mixer, and the ammonia supply pipe connected to the mixer.

[0018] Furthermore, the ammonia injector includes a branch pipe, a pneumatic valve, a distribution box, and an ammonia injection grid. One end of the branch pipe is connected to the mixer, and the other end is connected to the distribution box. The pneumatic valve is installed on the branch pipe, and the ammonia injection grid is connected to the distribution box.

[0019] Furthermore, the pneumatic valve is connected to the control system.

[0020] This utility model discloses an adjustable low-NOx combustion control system for a coal-fired power plant boiler. The boiler body provides the combustion environment, and a nozzle assembly and an oxygen supply assembly are located on one side of the boiler body. The boiler body also has an exhaust pipe. The air supply assembly provides air and includes a first air supply pipe and a second air supply pipe. One end of the first air supply pipe is connected to the nozzle assembly, and one end of the second air supply pipe is connected to the first air supply pipe, while the other end is connected to the oxygen supply assembly. The exhaust assembly discharges the combustion waste gas and includes a circulation pipe and a waste gas treatment assembly. The exhaust pipe is connected to the waste gas treatment assembly. The circulating pipe is connected at one end to the flue gas pipe and at the other end to the first gas supply pipe. The sensor component is used to detect gas data in each pipe. The sensor components are respectively installed in the furnace body, the flue gas pipe, the first gas supply pipe, and the second gas supply pipe. Compared with the prior art, in existing coal-fired power plant boilers, materials are injected into the boiler through nozzles. At the same time, in order to improve the combustion efficiency of the materials, the materials are mixed with air before being injected into the boiler. However, since the materials are usually pulverized coal, when the amount of pulverized coal injected increases, it will lead to incomplete combustion, which in turn will cause the pulverized coal to burn poorly. The process generates a large amount of nitrogen oxides, leading to significant fluctuations in nitrogen oxide emissions from the combustion flue gas. The amount of ammonia subsequently injected is closely related to the amount of nitrogen oxides in the flue gas, making it difficult for personnel to quickly determine the appropriate amount. This results in inaccurate assessment of the usage of subsequent denitrification equipment, significantly wasting ammonia and raw materials for the denitrification equipment. Furthermore, the flue gas after denitrification often fails to meet environmental protection requirements, causing environmental pollution. In this technical solution, an oxygen supply component is installed above the nozzle component. After the nozzle component sprays a mixture of pulverized coal and air and ignites it, the oxygen supply component continuously supplies oxygen, ensuring complete combustion of the pulverized coal. Then, in the furnace body and the exhaust pipe... Sensor components are installed in the first and second gas supply pipes. These sensors can monitor parameters such as temperature, oxygen concentration, nitrogen oxide concentration, fuel flow rate, and air flow rate in real time. The detected data is then transmitted to the control system. The control system calculates and analyzes the current combustion state for each parameter and determines the concentration of each parameter in the exhaust gas. Based on the concentration of each parameter, the system predicts the opening degree of the first and second gas supply pipes, the nozzle component, and the oxygen supply component, thereby improving the combustion efficiency in the furnace and reducing the generation of nitrogen oxides. This achieves the technical effect of improving the combustion efficiency of the material and reducing the concentration of nitrogen oxides. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of an adjustable low-NOx combustion control system for a coal-fired power plant boiler provided in this embodiment of the present invention;

[0022] Figure 2This is a schematic diagram of the structure of a nozzle component provided in an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the structure of an ammonia supply component provided in an embodiment of the present utility model. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0025] like Figures 1 to 3 As shown in the figure, this utility model embodiment provides an adjustable low-NOx combustion control system for a coal-fired power plant boiler, the system comprising:

[0026] Furnace body 1, with a nozzle component 12 and an oxygen supply component 13 provided on one side, and the furnace body 1 having a flue duct 14;

[0027] An air supply component, comprising a first air supply pipe 21 and a second air supply pipe 22, wherein one end of the first air supply pipe 21 is connected to the nozzle component 12, one end of the second air supply pipe 22 is connected to the first air supply pipe 21, and the other end is connected to the oxygen supply component 13.

[0028] An exhaust component, comprising a circulation pipe 31 and an exhaust gas treatment component, wherein the exhaust pipe 14 is connected to the exhaust gas treatment component, and one end of the circulation pipe 31 is connected to the exhaust pipe 14 and the other end is connected to the first gas supply pipe 21;

[0029] Sensor component 4 is respectively disposed in the furnace body 1, the flue gas duct 14, the first gas supply duct 21 and the second gas supply duct 22.

[0030] This utility model discloses an adjustable low-NOx combustion control system for a coal-fired power plant boiler. The boiler body 1 provides the combustion environment. A nozzle component 12 and an oxygen supply component 13 are located on one side of the boiler body 1. The boiler body 1 also has an exhaust pipe 14. The air supply component provides air and includes a first air supply pipe 21 and a second air supply pipe 22. One end of the first air supply pipe 21 is connected to the nozzle component 12, and one end of the second air supply pipe 22 is connected to the first air supply pipe 21, while the other end is connected to the oxygen supply component 13. The exhaust component discharges the exhaust gas after combustion and includes a circulation pipe. 31 and a waste gas treatment component, wherein the exhaust pipe 14 is connected to the waste gas treatment component, one end of the circulation pipe 31 is connected to the exhaust pipe 14, and the other end is connected to the first gas supply pipe 21; the function of the sensor component 4 is to detect the gas data in each pipe, and the sensor component 4 is respectively installed in the furnace body 1, the exhaust pipe 14, the first gas supply pipe 21, and the second gas supply pipe 22. Compared with the prior art, in existing coal-fired power plant boilers, materials are injected into the boiler through nozzles. At the same time, in order to improve the combustion efficiency of the materials, the materials are mixed with air before being injected into the boiler. However, Since the material is usually pulverized coal, an increase in the amount of pulverized coal injected can lead to incomplete combustion, resulting in the production of large amounts of nitrogen oxides during combustion. This causes significant fluctuations in nitrogen oxide emissions from the flue gas. The amount of ammonia subsequently injected is closely related to the amount of nitrogen oxides in the flue gas, making it difficult for personnel to quickly determine the amount of ammonia injected. This leads to inaccurate judgments regarding the usage of subsequent denitrification equipment, resulting in significant waste of ammonia and raw materials for the denitrification equipment. Furthermore, it makes it difficult for the flue gas after denitrification to meet environmental protection requirements, causing environmental pollution. In this technical solution, by using the furnace body 1, the exhaust pipe 14, the first gas supply pipe 21, and the... A sensor component 4 is installed inside the second gas supply pipe 22. The sensor component 4 can monitor parameters such as temperature, oxygen concentration, nitrogen oxide concentration, fuel flow rate, and air flow rate in real time. Then, the detected data is transmitted to the control system. The control system calculates and analyzes the current combustion state for each parameter and determines the concentration of each parameter in the exhaust gas. Based on the concentration of each parameter, the opening degree of the first gas supply pipe 21, the second gas supply pipe 22, the nozzle component 12, and the oxygen supply component 13 is predicted to improve the combustion efficiency in the furnace body 1 and reduce the generation of nitrogen oxides, thereby achieving the technical effect of improving the combustion efficiency of materials and reducing the concentration of nitrogen oxides.

[0031] A nozzle component 12 and an oxygen supply component 13 are provided on one side of the furnace body 1. The furnace body 1 has a flue gas duct 14. The nozzle component 12 is located in the middle of the furnace body 1. The oxygen supply component 13 is a secondary oxygen supply duct and is located above the nozzle component 12. The flue gas duct 14 is located at the upper part of the furnace body 1 and is used to discharge the flue gas after combustion. The function of the air supply component is to provide air. The air supply component includes a first air supply pipe 21 and a second air supply pipe 22. One end of the first air supply pipe 21 is connected to the nozzle component 12, and one end of the second air supply pipe 22 is connected to the first air supply pipe 21, and the other end is connected to the oxygen supply component 13. The first gas supply pipe 21 supplies air or oxygen to the nozzle component 12. Simultaneously, the second gas supply pipe 22 is connected to the oxygen supply component 13. Air or oxygen enters from the first gas supply pipe 21 into the second gas supply pipe 22 and the oxygen supply component 13. The oxygen supply component 13 supplies oxygen into the furnace body 1. The exhaust component discharges the exhaust gas after combustion. The exhaust component includes a circulation pipe 31 and an exhaust gas treatment component. The flue gas duct 14 is connected to the exhaust gas treatment component. One end of the circulation pipe 31 is connected to the flue gas duct 14, and the other end is connected to the first gas supply pipe 21. A portion of the flue gas enters the exhaust gas treatment component for treatment, and a portion of the flue gas enters the first gas supply pipe from the circulation pipe 31. The gas is circulated in section 21. Sensor component 4 is used to detect gas data in each pipe. Sensor components 4 are respectively installed in the furnace body 1, the exhaust pipe 14, the first gas supply pipe 21, and the second gas supply pipe 22. Sensor components 4 are high-temperature resistant and corrosion-resistant sensors, capable of real-time monitoring parameters such as temperature, oxygen concentration, nitrogen oxide concentration, fuel flow rate, and air flow rate. Furthermore, sensor components 4 are connected to the control system via signals. The control system uses existing control equipment. Sensor components 4 can transmit the collected data to the control system in real time. In this technical solution, by […] in the furnace body 1, the exhaust pipe 14, the first gas supply pipe 21, and the second gas supply pipe 22, […] Sensor components 4 are installed in the first gas supply pipe 21 and the second gas supply pipe 22. The sensor components 4 can monitor parameters such as temperature, oxygen concentration, nitrogen oxide concentration, fuel flow rate, and air flow rate in real time. Then, the detected data is transmitted to the control system. The control system calculates and analyzes the current combustion state of each parameter and determines the concentration of each parameter of the exhaust gas. Based on the concentration of each parameter, the opening degree of the first gas supply pipe 21, the second gas supply pipe 22, the nozzle component 12, and the oxygen supply component 13 is predicted to improve the combustion efficiency in the furnace body 1 and reduce the generation of nitrogen oxides, thereby achieving the technical effect of improving the combustion efficiency of materials and reducing the concentration of nitrogen oxides.

[0032] Furthermore, the nozzle component 12 includes a nozzle body 51, an ignition oil gun 52, an oil nozzle 53, and a pulverized coal pipe 54. The nozzle body 51 has a nozzle opening 55. The ignition oil gun 52 is mounted on the nozzle body 51, with one end of the ignition oil gun 52 extending into the nozzle opening 55. The pulverized coal pipe 54 is disposed inside the nozzle body 51, with one end of the pulverized coal pipe 54 connected to the first gas supply pipe 21. The oil nozzle 53 is inserted into the pulverized coal pipe 54 and extends into the nozzle opening 55. In this embodiment, the nozzle component 12 is further defined. The nozzle body 51 is installed in the middle of the furnace body 1. A nozzle orifice 55 is provided at one end of the nozzle body 51. An ignition oil gun 52 is installed on the upper part of the nozzle body 51. One end of the ignition oil gun 52 extends into the nozzle orifice 55 to ignite the material in the nozzle orifice 55. An oil nozzle 53 is located on the axis of the nozzle body 51. One end of the oil nozzle 53 extends into the nozzle orifice 55 to output fuel to the nozzle orifice 55. A pulverized coal pipe 54 is sleeved on the outside of the oil nozzle 53. One end of the pulverized coal pipe 54 extends into the nozzle 55, and the other end of the pulverized coal pipe 54 is connected to the pulverized coal channel and the first air supply pipe 21 respectively, so that pulverized coal and air can be introduced into the pulverized coal pipe 54 at the same time. The pulverized coal and air are mixed in the pulverized coal pipe 54 and then delivered to the nozzle 55. At the same time, the ignition oil gun 52 ignites the nozzle 55, and the oil nozzle 53 injects fuel into the nozzle 55, which is ignited by the ignition oil gun 52. The fuel, pulverized coal and air are ignited and burned in the nozzle 55, thereby achieving the technical effect of rapid combustion of pulverized coal.

[0033] Furthermore, the nozzle component 12 also includes an inner secondary air duct 56, an outer secondary air duct 57, and a cooling duct 58. The inner secondary air duct 56 extends into the pulverized coal duct 54, the cooling duct 58 is disposed outside the pulverized coal duct 54, and extends into the nozzle opening 55. The outer secondary air duct 57 is disposed outside the inner secondary air duct 56, and extends into the nozzle opening 55. In this embodiment, the nozzle component 12 is further defined. One end of the inner secondary air duct 56 extends into the pulverized coal duct 54. Optionally, the nozzle component 12 also includes a venturi tube 59 and a secondary air blade 50. The venturi tube 59 is disposed inside the pulverized coal duct 54 to increase the air velocity within the pulverized coal duct 54. The cooling duct 58 is disposed outside the pulverized coal duct 54, and a cooling air regulator 581 is disposed on the cooling duct 58 to adjust the airflow of the cooling air. The cooling air can also be diverted flue gas. The secondary air blade 50 is disposed outside the pulverized coal duct 54. When the secondary air blade 50 rotates, it can increase the airflow velocity within the pulverized coal duct 54. The airflow velocity in the cooling pipe 58 is controlled by the external secondary air pipe 57, which is located outside the internal secondary air pipe 56. Air can enter the furnace body 1 through the external secondary air pipe 57. An external secondary air regulator 571 is installed on the external secondary air pipe 57 to adjust the inflow rate of the external secondary air, thereby achieving the technical effect of adjusting the amount of air entering the furnace body 1. Optionally, the nozzle component 12 also includes a regulating valve, which is respectively installed on the oil nozzle 53 and the pulverized coal pipe 54. The regulating valve can adjust the oil inlet of the oil nozzle 53 and the coal inlet and air inlet of the pulverized coal pipe 54, thereby achieving the technical effect of conveniently adjusting the material feed rate.

[0034] Furthermore, a control system is added, which is connected to each of the regulating valves and each of the sensor components 4. In this embodiment, a control system is added, which adopts an existing intelligent control system. The control system is connected to each of the regulating valves and each of the sensor components 4, and is also connected to the regulating valves, cooling air regulator 581, and external secondary air regulator. The control system collects parameters such as temperature, oxygen concentration, nitrogen oxide concentration, fuel flow rate, and air flow rate through multiple sensors. Then, it filters and calibrates the data uploaded by the sensors to eliminate noise interference. Then, it builds a model on the processed data. The model can be built using fuzzy control, neural network, or PID algorithm to analyze the current combustion state and predict the optimal control parameters. Then, based on the calculation results, it automatically controls the opening of the regulating valves, cooling air regulator 581, and external secondary air regulator to optimize combustion efficiency and reduce nitrogen oxide generation, thereby achieving the technical effect of reducing the nitrogen oxide generation rate.

[0035] Furthermore, the waste gas treatment component includes an ammonia supply component 32 and a denitrification component 33. One end of the ammonia supply component 32 extends into the flue gas duct 14, and the denitrification component 33 is connected to the other end of the flue gas duct 14. In this embodiment, the waste gas treatment component is further defined. The function of the ammonia supply component 32 is to introduce ammonia gas into the flue gas duct 14. Ammonia gas can improve the denitrification efficiency. After entering the flue gas duct 14, the ammonia gas mixes thoroughly with nitrogen oxides. The mixed gas enters the denitrification component 33 to generate nitrogen gas and water. In addition, it can also reduce ammonia escape and equipment blockage, thereby reducing operating costs.

[0036] Furthermore, the ammonia supply component 32 includes an ammonia supply pipe 61, a mixer 62, and a plurality of ammonia injectors. The ammonia injectors are disposed in the flue gas pipe 14, one end of the ammonia injector is connected to the mixer 62, and the ammonia supply pipe 61 is connected to the mixer 62. In this embodiment, the ammonia supply component 32 is further defined. Ammonia gas is input into the ammonia supply pipeline 61 by the ammonia supply equipment. The ammonia gas enters the mixer 62 through the ammonia supply pipeline 61. Air is introduced into the mixer 62, and the air and ammonia gas are mixed in the mixer 62 and enter the ammonia injector. Specifically, the ammonia injector includes a branch pipeline 63, a pneumatic valve 64, a distribution box 65, and an ammonia injection grid 66. One end of the branch pipeline 63 is connected to the mixer 62, and the other end is connected to the distribution box 65. The pneumatic valve 64 is installed on the branch pipeline 63. The ammonia injection grid 66 is connected to the distribution box 65. The mixed gas of ammonia gas and air enters the ammonia injection grid 66 through the branch pipeline 63 and the distribution box 65. The ammonia injection grid 66 sprays out ammonia gas. The pneumatic valve 64 is used to adjust the amount of ammonia gas injected. Furthermore, the pneumatic valve 64 is connected to the control system. The control system can adjust the opening degree of the pneumatic valve 64 based on the data detected at the front end and data analysis, thereby achieving the technical effect of adjusting the amount of ammonia gas injected.

[0037] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An adjustable low-NOx combustion control system for a coal-fired power plant boiler, characterized in that, include: The furnace body has a nozzle component and an oxygen supply component on one side, and the furnace body has a flue gas exhaust pipe. An air supply component, comprising a first air supply pipe and a second air supply pipe, wherein one end of the first air supply pipe is connected to the nozzle component, one end of the second air supply pipe is connected to the first air supply pipe, and the other end is connected to the oxygen supply component; An exhaust system includes a circulation pipe and an exhaust gas treatment component. The exhaust pipe is connected to the exhaust gas treatment component, and one end of the circulation pipe is connected to the exhaust pipe, while the other end is connected to the first gas supply pipe. The sensor components are respectively disposed in the furnace body, the flue gas duct, the first gas supply duct and the second gas supply duct.

2. The adjustable low-NOx combustion control system for a coal-fired power plant boiler according to claim 1, characterized in that, The nozzle assembly includes a nozzle body, an ignition oil gun, an oil nozzle, and a pulverized coal pipeline. The nozzle body has a nozzle opening. The ignition oil gun is mounted on the nozzle body, with one end of the ignition oil gun extending into the nozzle opening. The pulverized coal pipeline is disposed inside the nozzle body, with one end of the pulverized coal pipeline connected to the first gas supply pipeline. The oil nozzle is inserted into the pulverized coal pipeline and extends into the nozzle opening.

3. The adjustable low-NOx combustion control system for a coal-fired power plant boiler according to claim 2, characterized in that, The nozzle component further includes an inner secondary air duct, an outer secondary air duct, and a cooling duct. The inner secondary air duct extends into the pulverized coal duct. The cooling duct is located outside the pulverized coal duct and extends into the nozzle opening. The outer secondary air duct is located outside the inner secondary air duct and extends into the nozzle opening.

4. The adjustable low-NOx combustion control system for a coal-fired power plant boiler according to claim 3, characterized in that, The nozzle component also includes a venturi tube and a secondary air blade, wherein the venturi tube is disposed inside the pulverized coal pipeline and the secondary air blade is disposed outside the pulverized coal pipeline.

5. The adjustable low-NOx combustion control system for a coal-fired power plant boiler according to claim 3, characterized in that, The nozzle component also includes a regulating valve, which is respectively disposed on the nozzle and the pulverized coal pipeline.

6. The adjustable low-NOx combustion control system for a coal-fired power plant boiler according to claim 5, characterized in that, Also includes: A control system is connected to each of the regulating valves and each of the sensor components.

7. The adjustable low-NOx combustion control system for a coal-fired power plant boiler according to claim 6, characterized in that, The exhaust gas treatment component includes an ammonia supply component and a denitrification component. One end of the ammonia supply component extends into the exhaust pipe, and the denitrification component is connected to the other end of the exhaust pipe.

8. The adjustable low-NOx combustion control system for a coal-fired power plant boiler according to claim 7, characterized in that, The ammonia supply component includes an ammonia supply pipeline, a mixer, and multiple ammonia injectors. The ammonia injectors are installed inside the flue gas pipeline, with one end of each injector connected to the mixer, and the ammonia supply pipeline connected to the mixer.

9. The adjustable low-NOx combustion control system for a coal-fired power plant boiler according to claim 8, characterized in that, The ammonia injector includes a branch pipe, a pneumatic valve, a distribution box, and an ammonia injection grid. One end of the branch pipe is connected to the mixer, and the other end is connected to the distribution box. The pneumatic valve is installed on the branch pipe, and the ammonia injection grid is connected to the distribution box.

10. The adjustable low-NOx combustion control system for a coal-fired power plant boiler according to claim 9, characterized in that, The pneumatic valve is connected to the control system.

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