An ammonia injection device and system

Abstract

This application relates to the field of denitrification technology, and in particular to an ammonia water injection device and system. The injection device includes a spray gun, a spray gun base, and an adjustment assembly. The spray gun includes a gun body and an atomizing nozzle, the atomizing nozzle being disposed at the end of the gun body. The air inlet of the gun body is connected to an air source, and the liquid inlet is connected to an ammonia water source. The spray gun base includes a base body, a curved hemisphere, a mounting shaft, and an adjustment rod. The base body is provided with a cylindrical groove, a hemispherical groove, and a cavity. The curved hemisphere is disposed within the hemispherical groove, isolating the cylindrical groove from the cavity. The curved hemisphere is provided with a mounting hole, and the gun body is sealed within the mounting hole. The mounting shaft is disposed on the curved hemisphere and rotatably mounted on the base body. This application utilizes waste heat from exhaust gas to heat ammonia water and uses an angle-adjustable atomizing nozzle to adapt to changes in flue gas flow rate, thereby achieving flue gas treatment.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of denitration treatment, in particular to an ammonia water spraying device and system. BACKGROUND

[0002] Under the background of pursuing green development, the semi-coke industry is also transforming towards energy saving and environmental protection. Adopting advanced nitrogen oxide control technology can help enterprises improve their competitiveness and adapt to the development trend of the industry. By using a heat exchange device to efficiently transfer the lime kiln tail gas waste heat to ammonia water, the ammonia water can be quickly heated to the appropriate reaction temperature, realizing the treatment of tail gas while reasonably recycling the tail gas waste heat and improving energy utilization.

[0003] At present, a Chinese patent application with the publication number CN105157044B and the publication date of January 5, 2018 proposes a waste incinerator leachate back spraying denitration device and method. The waste incinerator leachate back spraying denitration device comprises: a leachate spraying control system, an SNCR lance control system, a waste leachate lance array arranged on the incinerator hearth wall, a thermocouple and an infrared temperature detector arranged in the waste heat boiler first flue, an SNCR lance array arranged in the waste heat boiler first flue, a NO X sensor and an O2 sensor; the SNCR lance control system is connected with the leachate spraying control system, the NO X sensor and the O2 sensor; the waste leachate lance array is composed of four lances, namely A lance, B lance, C lance and D lance, the flow rate of each lance is independently controlled, and the height is located at 3 / 5 of the height of the furnace; among the four lances, A lance and B lance form a group, and C lance and D lance form a group; A lance and B lance are symmetrically arranged on the front wall and the back wall of the incinerator hearth wall, respectively, and C lance and D lance are symmetrically arranged on the front wall and the back wall of the incinerator hearth wall, respectively.

[0004] The mixed waste leachate clear liquid is pumped to the leachate spraying control system, the leachate spraying control system distributes the four lances of the waste leachate lance array, the flow rate of each lance is independently controlled, and under the atomization action of compressed air, the lances are uniformly sprayed into the waste incinerator for high-temperature incineration treatment, and ammonia is volatilized and NO X is generated under high temperature to realize denitration reaction.

[0005] Regarding the aforementioned technologies, the fixed installation of the spray gun limits its adaptability to changes in flue gas flow. When flue gas flow fluctuates or operating conditions change, the fixed spray gun cannot adjust its spray trajectory and coverage in real time, potentially resulting in some flue gas failing to fully mix and contact with the injected medium (such as desulfurization slurry, denitrification reducing agent, etc.), thus affecting reaction efficiency and treatment effect. This limitation is particularly pronounced during periods of significant load change or start-up and shutdown, potentially leading to unstable pollutant emissions, increased medium usage, or delayed system adjustment response. Therefore, the existing fixed spray gun structure has limitations in adapting to dynamic changes in flue gas flow, restricting the overall flexibility of system adjustment. Summary of the Invention

[0006] This application provides an ammonia water injection device and system that utilizes the waste heat of exhaust gas to heat ammonia water and uses an angle-adjustable atomizing nozzle to adapt to changes in flue gas flow rate, thereby achieving flue gas treatment.

[0007] An ammonia injection device, comprising: Spray gun, spray gun holder, and adjustment components; The spray gun includes a gun body and an atomizing nozzle. The atomizing nozzle is disposed at the end of the gun body. The air inlet of the gun body is connected to an air source, and the liquid inlet is connected to an ammonia water source. The spray gun holder includes a base body, a curved hemisphere, a mounting shaft, and an adjusting rod. The base body is provided with a cylindrical groove, a hemispherical groove, and a cavity. The curved hemisphere is disposed in the hemispherical groove, isolating the cylindrical groove from the cavity. The curved hemisphere is provided with a mounting hole, and the gun body is sealed in the mounting hole. The mounting shaft is disposed on the curved hemisphere and rotatably disposed on the base body. The adjusting rod is disposed on the mounting shaft and is provided with an adjusting groove. The adjustment assembly includes a telescopic rod and a power rod. The fixed end of the telescopic rod is disposed on the base, and the power rod is disposed on the free end of the telescopic rod. The power rod is slidably disposed within the adjustment groove.

[0008] By adopting the above technical solution, the spray gun holder is securely installed in a preset position in the smoke chamber section. During operation, a gas source and ammonia water source at a set pressure are introduced into the gun body. The two are fully mixed and atomized inside the atomizing nozzle, forming uniform and fine ammonia water droplets that are sprayed into the flue gas. With the atomization effect of the nozzle, the ammonia water can diffuse over a large area in the flue gas, achieving full and uniform mixing and contact with nitrogen oxides in the flue gas, thereby significantly improving the efficiency and thoroughness of the denitrification reaction. When the system operating conditions change, the spray angle of the atomizing nozzle can be flexibly adjusted. The telescopic rod is controlled to extend and retract, and the telescopic rod drives the power rod to slide along the adjustment groove; the power rod drives the adjustment rod to swing; the adjustment rod drives the mounting shaft to rotate within its support; the rotation of the mounting shaft is synchronously transmitted to the superior arc hemisphere, causing the superior arc hemisphere to deflect accordingly, and the superior arc hemisphere drives the gun body to swing together, realizing precise and continuous adjustment of the spray angle of the atomizing nozzle. It can adjust the coverage and mixing path of atomized ammonia water in a timely manner according to changes in system parameters such as flue gas flow rate and concentration distribution, ensuring that the optimal mixing effect of ammonia water and flue gas is maintained under different operating conditions, thereby ensuring the continuous, stable and efficient operation of the denitrification system. The superior arc hemisphere and the base body and the gun body and the hemisphere form the first sealing structure, effectively preventing flue gas from leaking outward.

[0009] Optionally, the spray gun further includes a sealing movable arc plate disposed on the gun body, and the spray gun base further includes two sealing fixed arc plates disposed on the base body, the sealing movable arc plate abutting against the sealing fixed arc plate, and the sealing movable arc plate slidably disposed on the sealing fixed arc plate.

[0010] By adopting the above technical solution, when the spray gun oscillates, the moving sealing arc plate moves along the fixed sealing arc plate, and the two maintain close contact during operation, forming a continuous and reliable second sealing structure. This structure effectively enhances the redundancy of the sealing system and can significantly prevent high-temperature, dusty, or corrosive fumes from leaking outwards along the oscillation gap, thereby protecting the external working environment and surrounding equipment components. The middle area of ​​the two sealing structures becomes a relatively enclosed buffer zone, which helps to improve the service life and operational reliability of related components within it, and reduces maintenance frequency and operating costs.

[0011] Optionally, the system also includes a gun body fixing assembly and an unlocking assembly. The gun body fixing assembly further includes a mounting cylinder, a mounting block, a positioning pin, and a compression spring. The mounting cylinder is disposed on the doubly curved hemisphere. The mounting block is inserted into the mounting cylinder and disposed on the gun body. The mounting block has a positioning hole. The positioning pin is inserted into the mounting cylinder and the positioning hole. The positioning pin has a hook groove. One end of the compression spring is connected to the positioning pin, and the other end is connected to the mounting cylinder. The unlocking assembly includes a guide cylinder, an unlocking rod, a spring, a connecting rod, a hook, and a locking bolt. The guide cylinder is inserted into the base body. The unlocking rod is slidably disposed in the guide cylinder. One end of the spring is connected to the guide cylinder, and the other end is connected to the unlocking rod. One end of the connecting rod is rotatably connected to the unlocking rod, and the other end is rotatably connected to the hook. The hook is rotatably connected to the guide cylinder. When the length of the hook is parallel to the length direction of the guide cylinder, the hook is inserted into the hook groove. The locking bolt is threadedly connected to the base body and is inserted into the fixing hole.

[0012] By adopting the above technical solution, when maintenance of the spray gun is required, the spray gun is positioned radially in the smoke chamber section. At this time, the locking bolt is unscrewed from the fixing hole, and the unlocking lever is pulled upwards. The unlocking lever stretches the spring, causing the connecting rod to swing. The connecting rod then causes the hook to swing, inserting it into the hook slot. Continuing to pull the unlocking lever upwards, the unlocking lever, guide cylinder, connecting rod, and hook become a single unit under the resistance of the positioning pin, causing the positioning pin to move upwards. The positioning pin and mounting cylinder compress the compression spring, allowing the positioning pin to be pulled out of the positioning hole for easy removal of the spray gun. After the spray gun is installed, the unlocking lever is released, the spring and compression spring return to their original positions, the hook disengages from the hook slot, and the positioning pin inserts into the positioning hole. The guide cylinder is pressed against the positioning pin to ensure proper installation. Then, the guide cylinder is moved upwards to align the locking bolt with the fixing hole and tighten it into the fixing hole. By setting up the gun body fixing assembly, the spray gun can be securely installed in the working position, ensuring the stability of the spraying operation. A compression spring continuously applies pressure to the locating pin, ensuring a tight fit within the locating hole and achieving a reliable connection between the hemispherical nozzle and the spray gun, preventing loosening due to vibration during operation. This structure not only ensures a stable connection but also makes adjusting the atomizing nozzle angle simpler and more flexible, allowing for precise adjustments as needed based on process requirements. The unlocking component allows the locating pin to be pulled out. The hook can only be aligned and engaged in the hook slot when the gun body is nearly in the radial position, thus unlocking and effectively preventing misoperation, enhancing the device's safety. Under the action of the spring, the hook automatically returns to its original position after the unlocking action is completed, moving away from the hook slot to avoid interference with subsequent operations. During spray gun angle adjustment, there is no contact between the locating pin and the hook, ensuring smooth adjustment and preventing wear caused by friction, which helps extend the equipment's service life. The overall structure is reasonable, safe and easy to operate, and balances stability and flexibility.

[0013] Optionally, the end of the mounting block is an arc-shaped portion.

[0014] By adopting the above technical solution, the unlocking lever can be released directly after the spray gun is removed. During spray gun installation, after the mounting block enters the mounting cylinder, the arc-shaped part contacts the positioning pin, causing the positioning pin to move upward. The positioning pin compresses the spring. When the positioning pin disengages from the arc-shaped part, it stops moving. When it aligns with the positioning hole, the spring returns to its original position, causing the positioning pin to insert into the positioning hole and strike the mounting block, accompanied by a slight "click" sound, indicating that the spray gun has been firmly locked onto the mounting base. The entire process achieves rapid and reliable installation and fixation of the spray gun, taking into account both operational convenience and safety.

[0015] Optionally, the unlocking assembly further includes a power disc and a power linkage. The power disc is rotatably mounted on the base, and one end of the power linkage is rotatably mounted on the edge of the power disc, while the other end is rotatably mounted on the unlocking rod.

[0016] By adopting the above technical solution, when the power disc is rotated, it drives the power linkage to swing, and the power linkage drives the unlocking lever to move. This facilitates unlocking. The entire process is achieved through simple mechanical linkage, with a reliable structure and labor-saving operation, effectively improving the convenience and efficiency of unlocking.

[0017] Optionally, the spray gun further includes a gun body positioning block, which is disposed on the gun body. The doubly curved hemisphere is provided with a gun body positioning groove, and the gun body positioning block is inserted into the gun body positioning groove.

[0018] By adopting the above technical solution, when installing the spray gun, the gun body positioning block is inserted into the gun body positioning slot to achieve the positioning of the gun body, improve installation efficiency, reduce operation complexity, and provide a good alignment basis for subsequent fastening and connection steps, thereby ensuring the accuracy and stability of the overall assembly.

[0019] An ammonia injection system includes: an exhaust gas pipeline, an ammonia heating mechanism, a gas and liquid supply mechanism, several flue gas analyzers, and several ammonia injection devices. The exhaust gas pipeline includes a main pipeline, a first branch pipe, and a first branch pipe control valve. The main pipeline is connected to the smoke chamber section, the first branch pipe is connected to the main pipeline, and the first branch pipe control valve is installed on the first branch pipe. The ammonia heating mechanism includes a heat exchanger, an ammonia supply cold pipe, an ammonia supply heat pipe, an ammonia temperature sensor, a liquid solenoid valve, and a first exhaust pipe. The first branch pipe is connected to the air inlet of the heat exchanger, the air outlet of the heat exchanger is connected to the first exhaust pipe, the ammonia supply cold pipe is connected to the liquid inlet of the heat exchanger, the liquid solenoid valve is installed on the ammonia supply cold pipe, the liquid outlet of the heat exchanger is connected to the ammonia supply heat pipe, and the ammonia temperature sensor is installed on the ammonia supply heat pipe. The gas and liquid supply mechanism includes a booster pump, a gas solenoid valve, a liquid metal hose, and a gas metal hose. The ammonia supply heat pipe is connected to the inlet of the booster pump, the outlet of the booster pump is connected to the liquid inlet of the gun body through the liquid metal hose, the gas solenoid valve is connected to the gas source, and the gas solenoid valve is connected to the air inlet of the gun body through the gas metal hose. Several of the ammonia water injection devices are arranged in layers along the height direction of the smoke chamber section and are evenly arranged along its circumference. At least one of the flue gas analyzers is located at the center of the smoke chamber section, and the remaining flue gas analyzers are arranged in layers along the height direction of the smoke chamber section, alternating with the layered ammonia water injection device.

[0020] By adopting the above technical solution, the waste heat from the lime kiln exhaust gas is efficiently transferred to the ammonia water via a heat exchanger, ensuring that the ammonia water can be rapidly heated to the appropriate reaction temperature. The heated ammonia water is then fed into a booster pump via an ammonia water supply heat pipe, and then into the spray gun via a liquid metal hose. Gas enters the spray gun via a gas solenoid valve and a gas metal hose. The gun body mixes the ammonia water and gas before spraying it out from the atomizing nozzle. Utilizing the exhaust gas to heat the ammonia water allows for the rational recovery and utilization of the exhaust gas's waste heat, improving energy efficiency. A flue gas analyzer analyzes parameters such as flue gas composition, controlling the spray volume of the atomizing nozzle based on the flue gas composition. An ammonia water temperature sensor detects the temperature of the ammonia water. When the temperature is low, while maintaining the flow rate, the opening of the first branch pipe control valve is reduced, decreasing the exhaust gas supply. When a reduced flow rate is needed, the opening of the first branch pipe control valve and the liquid solenoid valve are reduced. The same applies when the flow rate increases. When the ammonia water flow rate changes, the booster pump and gas solenoid valve are controlled to ensure normal ammonia water pressure and the output ammonia water mist. Using the waste heat from the lime kiln exhaust gas to heat ammonia water achieves secondary utilization of waste heat. This reduces the energy consumption of the semi-coke drying kiln and the heat emission from the lime kiln exhaust gas, improving the energy efficiency of the entire production system. It also significantly improves the removal efficiency of nitrogen oxides, effectively reducing the emission of nitrogen oxides in the flue gas of the drying kiln, reducing environmental pollution, and achieving the dual effects of energy conservation and emission reduction.

[0021] Optionally, the number of ammonia injection devices in each layer is even, with the two atomizing nozzles of the gun body being closer to the center of the smoke chamber section and serving as central nozzles, while the remaining atomizing nozzles are edge nozzles.

[0022] By adopting the above technical solution, in the initial state, the gun body is installed vertically in the flue section of the smoke chamber. When the flow rate is high and the velocity is fast, the impact force of the central flow field is large and the mixing at the edge is insufficient. The central nozzle deflects outward by 10°~20° (with the vertical flue gas flow direction as the reference), and deflects towards the inner wall of the flue section of the smoke chamber to expand the droplet coverage radius. The edge nozzles deflect in the opposite direction by 5°~10° to fill the mixing gap between the center and the edge.

[0023] Optionally, the ammonia water supply heat pipe includes a first supply branch pipe and a second supply branch pipe, the ammonia water heating mechanism further includes a temporary storage tank, a water pump, a storage temperature sensor and a second exhaust pipe, the exhaust gas pipeline further includes a second branch pipe and a second branch pipe control valve, one end of the first supply branch pipe is connected to the liquid outlet of the heat exchanger and the other end is connected to the liquid inlet of the temporary storage tank, the water pump is installed on the temporary storage tank, one end of the second supply branch pipe is connected to the water pump and the other end is connected to the booster water pump, one end of the second branch pipe is connected to the main pipeline and the other end is connected to the air inlet of the temporary storage tank, the second branch pipe control valve is installed on the second branch pipe, the air outlet of the temporary storage tank is connected to the second exhaust pipe, and the storage temperature sensor is installed inside the temporary storage tank.

[0024] By adopting the above technical solution, heated ammonia water is temporarily stored. A storage temperature sensor monitors the temperature, and when it falls below a threshold, the opening of the second branch control valve is controlled to increase the flow rate of the heat medium into the heat exchange coil of the temporary storage tank. This provides auxiliary heating to the ammonia water in the tank, stabilizing its temperature within the required range and ensuring that the physicochemical properties and reactivity of the ammonia water meet the conditions for subsequent use. When ammonia water is needed, a water pump operates to draw ammonia water from the temporary storage tank and supply it to the booster pump. This avoids temperature loss of ammonia water while waiting for supply, ensures the continuity and response speed of the supply process, and improves the overall energy efficiency and operational reliability of the system.

[0025] Optionally, the ammonia heating mechanism further includes a level gauge, which is disposed inside the temporary storage tank.

[0026] By adopting the above technical solution, the ammonia level in the temporary storage tank can be monitored in real time, which makes it easier for operators to grasp the storage information in a timely manner and reduce the opening of the liquid solenoid valve when the ammonia volume is large.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. This invention employs an angle-adjustable atomizing nozzle. When flue gas flow fluctuates or operating conditions change, the spray trajectory and coverage of the atomizing nozzle are adjusted to ensure that the flue gas and the injected medium (such as desulfurization slurry, denitrification reducing agent, etc.) are fully mixed and contacted, thereby improving reaction efficiency and treatment effect.

[0028] 2. This invention enhances the redundancy of the sealing system by incorporating two sealing mechanisms, significantly preventing the leakage of high-temperature, dusty, or corrosive fumes along the swing gap, thereby protecting the external working environment and surrounding equipment components. The intermediate area between the two sealing structures forms a relatively enclosed buffer zone, which helps improve the service life and operational reliability of related components within it, reducing maintenance frequency and operating costs.

[0029] 3. In this invention, during the angle adjustment of the spray gun, there is no contact between the positioning pin and the hook, which ensures smooth adjustment and avoids wear caused by friction, thus extending the service life of the equipment. When the unlocking lever is pulled outward, the hook inserts into the hook slot, making it easy and convenient to pull the positioning pin out of the positioning hole, greatly improving the efficiency and convenience of operation.

[0030] 4. This invention utilizes the waste heat from lime kiln tail gas to heat ammonia water, achieving secondary utilization of waste heat. This reduces the energy consumption of the semi-coke drying kiln and the heat emission from the lime kiln tail gas, improving the energy efficiency of the entire production system. It also significantly improves the removal efficiency of nitrogen oxides, effectively reducing the emission of nitrogen oxides in the drying kiln flue gas, reducing environmental pollution, and achieving the dual effects of energy saving and emission reduction. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the system structure according to an embodiment of this application; Figure 2 This is a three-dimensional structural diagram of the ammonia water injection device according to an embodiment of this application; Figure 3 This is a partially cutaway schematic diagram of the ammonia injection device according to an embodiment of this application; Figure 4 This is a partially cutaway schematic diagram of the spray gun holder according to an embodiment of this application; Figure 5 This is a three-dimensional structural diagram of the spray gun holder and gun body fixing assembly according to an embodiment of this application; Figure 6 This is a partial exploded view of the ammonia injection device according to an embodiment of this application; Figure 7 This is a partial three-dimensional structural diagram of the ammonia water injection device according to an embodiment of this application; Figure 8 This is a partial exploded view of the unlocking component in an embodiment of this application.

[0032] Figure label: 100. Spray gun; 110. Gun body; 120. Atomizing nozzle; 130. Sealing moving arc plate; 140. Gun body positioning block; 200. Spray gun holder; 210. Base body; 211. Cylindrical groove; 212. Hemispherical groove; 213. Cavity; 220. Large arc hemisphere; 221. Mounting hole; 222. Gun body positioning groove; 230. Mounting shaft; 240. Adjusting rod; 241. Adjusting groove; 250. Sealing and fixing arc plate; 260. Bolt mounting plate; 300. Adjustment assembly; 310. Telescopic rod; 320. Power rod; 330. Telescopic guide rod; 400. Gun body fixing assembly; 410. Mounting cylinder; 420. Mounting block; 421. Positioning hole; 422. Arc portion; 430. Positioning pin; 431. Hook groove; 440. Compression spring; 450. Compression spring mounting plate; 500. Unlocking component; 510. Guide cylinder; 511. Fixing hole; 512. Pressure plate; 513. Cylinder body; 520. Unlocking rod; 530. Spring; 540. Connecting rod; 550. Hook; 560. Locking bolt; 570. Power plate; 580. Power connecting rod; 600. Exhaust gas pipe; 610. Main pipe; 620. First branch pipe; 630. First branch pipe control valve; 640. Second branch pipe; 650. Second branch pipe control valve; 660. Gas temperature sensor; 670. Flow meter; 700. Ammonia heating mechanism; 710. Heat exchanger; 720. Ammonia supply cooling pipe; 730. Ammonia supply heating pipe; 731. Ammonia temperature sensor; 732. First supply branch pipe; 733. Second supply branch pipe; 740. Liquid solenoid valve; 741. First exhaust pipe; 750. Temporary storage tank; 751. Storage temperature sensor; 752. Second exhaust pipe; 753. Level gauge; 760. Water pump; 800. Gas / liquid supply mechanism; 810. Booster water pump; 820. Gas solenoid valve; 830. Liquid metal hose; 840. Gas metal hose; 900. Smoke chamber section; 910. Flue gas analyzer. Detailed Implementation

[0033] The following combination Figures 1 to 8 This application will be described in further detail.

[0034] refer to Figure 1This embodiment provides an ammonia injection system, the overall structure of which includes: an exhaust gas pipe 600, an ammonia heating mechanism 700, a gas supply and liquid supply mechanism 800, a plurality of flue gas analyzers 910, and a plurality of the aforementioned ammonia injection devices. The exhaust gas pipe 600 connects to the flue gas chamber section 900 and the ammonia heating mechanism 700, the ammonia heating mechanism 700 connects to the gas supply and liquid supply mechanism 800, and the gas supply and liquid supply mechanism 800 connects to the ammonia injection devices. The plurality of ammonia injection devices are arranged in layers along the height direction of the flue gas chamber section 900 and uniformly arranged along its circumference; at least one of the flue gas analyzers 910 is located at the center of the flue gas chamber section 900, and the remaining flue gas analyzers 910 are arranged in layers along the height direction of the flue gas chamber section 900, alternating with the layered ammonia injection devices. During flue gas treatment, the exhaust gas pipe 600 provides a heat source to the ammonia heating mechanism 700 to heat the ammonia, bringing it to a suitable reaction temperature and improving the removal efficiency of nitrogen oxides. The gas and liquid supply mechanism 800 provides a stable source of ammonia water and gas for the ammonia water injection device. The gas source uses compressed air to facilitate the injection of a stable ammonia water mist. The flue gas analyzer 910 analyzes parameters such as flue gas composition and controls the injection volume of the atomizing nozzle 120 based on the flue gas composition.

[0035] refer to Figure 1 The exhaust gas pipeline 600 includes a main pipeline 610, a first branch pipe 620, a first branch pipe control valve 630, a second branch pipe 640, a second branch pipe control valve 650, two gas temperature sensors 660, and two flow meters 670. The main pipeline 610 connects to the smoke chamber section 900, the first branch pipe 620 connects to the main pipeline 610, the first branch pipe control valve 630 is installed on the first branch pipe 620, one end of the second branch pipe 640 connects to the main pipeline 610, and the second branch pipe control valve 650 is installed on the second branch pipe 640. The gas temperature sensor 660 and the flow meter 670 are respectively installed on the first branch pipe 620 and the second branch pipe 640. The main pipeline 610 collects the exhaust gas from the smoke chamber section 900 and delivers it to the first branch pipe 620 and the second branch pipe 640 to provide a heat source for the ammonia heating mechanism 700. The gas temperature sensor 660 and flow meter 670 monitor the temperature and flow of the exhaust gas, facilitating temperature control of the ammonia water. By utilizing the waste heat from the lime kiln exhaust gas to heat the ammonia water, the secondary utilization of waste heat is achieved. This reduces the energy consumption of the semi-coke drying kiln and the heat emission from the lime kiln exhaust gas, improving the energy efficiency of the entire production system. It also significantly improves the removal efficiency of nitrogen oxides, effectively reducing the emission of nitrogen oxides in the flue gas of the drying kiln, reducing environmental pollution, and achieving the dual effects of energy saving and emission reduction.

[0036] refer to Figure 1The ammonia heating mechanism 700 includes a heat exchanger 710, an ammonia supply cooling pipe 720, a first supply branch pipe 732, a second supply branch pipe 733, an ammonia temperature sensor 731, a liquid solenoid valve 740, a first exhaust pipe 711, a temporary storage tank 750, a water pump 760, a storage temperature sensor 751, a second exhaust pipe 752, and a level gauge 753. The first branch pipe 720 is connected to the air inlet of the heat exchanger 710, and the air outlet of the heat exchanger 710 is connected to the first exhaust pipe 711. The ammonia supply cooling pipe 720 is connected to the liquid inlet of the heat exchanger 710. The liquid solenoid valve 740 is installed on the ammonia supply cooling pipe 720. Ammonia temperature sensor 731 is installed on the first supply branch pipe 732; one end of the first supply branch pipe 732 is connected to the liquid outlet of the heat exchanger 710, and the other end is connected to the liquid inlet of the temporary storage tank 750; the water pump 760 is installed on the temporary storage tank 750; one end of the second supply branch pipe 733 is connected to the water pump 760; the other end of the second branch pipe 640 is connected to the air inlet of the temporary storage tank 750; the air outlet of the temporary storage tank 750 is connected to the second exhaust pipe 752; the storage temperature sensor 751 is installed inside the temporary storage tank 750; and the level gauge 753 is installed inside the temporary storage tank 750.

[0037] refer to Figure 1 The first branch pipe 620 inputs the exhaust gas into the heat exchanger 710, and the ammonia water supply cooling pipe 720 inputs ammonia water into the heat exchanger 710. Heat exchange is completed between the two. The gas is discharged through the first exhaust pipe 711, and the ammonia water enters the temporary storage tank 750 through the first supply branch pipe 732. The second branch pipe 640 provides hot air to the temporary storage tank 750 to keep the ammonia water inside warm. The water pump 760 operates to draw ammonia water from the temporary storage tank 750 and supply it to the gas and liquid supply mechanism 800. The ammonia water temperature sensor 731 detects the temperature of the ammonia water. When the temperature is low, while ensuring the flow rate, the opening of the first branch pipe control valve 630 is reduced to decrease the exhaust gas supply. When a reduction in flow rate is needed, the opening of the first branch pipe control valve 630 is reduced, and the opening of the liquid solenoid valve 740 is also reduced. The same applies when the flow rate increases. The storage temperature sensor 751 detects the temperature. When the temperature is below a threshold, it controls the opening of the second branch control valve 650 to increase the flow rate of the heat medium into the heat exchange coil of the temporary storage tank, thus providing auxiliary heating to the ammonia water inside the tank and stabilizing its temperature within the required range. This avoids temperature loss of the ammonia water while waiting for supply, ensures the continuity and responsiveness of the supply process, and improves the overall energy efficiency and operational reliability of the system. The level gauge 753 monitors the ammonia water level in the temporary storage tank 750 in real time, allowing operators to promptly grasp the storage volume information. When the ammonia water volume is large, the opening of the liquid solenoid valve 740 can be reduced.

[0038] refer to Figure 1The gas and liquid supply mechanism 800 includes a booster pump 810, a gas solenoid valve 820, a liquid metal hose 830, and a gas metal hose 840. A second supply branch pipe 733 connects to the inlet of the booster pump 810, and the outlet of the booster pump 810 connects to the liquid inlet of the gun body 110 via the liquid metal hose 830. The gas solenoid valve 820 connects to a gas source, and the gas solenoid valve 820 connects to the air inlet of the gun body 110 via the gas metal hose 840. Heated ammonia water is input into the booster pump 810 through the second supply branch pipe 733 and then into the spray gun 100 via the liquid metal hose 830. Compressed air enters the spray gun 100 via the gas solenoid valve 820 and the gas metal hose 840. After the gun body 110 mixes the ammonia water and gas, it is sprayed out from the atomizing nozzle 120. When the ammonia water flow rate changes, the booster pump 810 and the gas solenoid valve 820 are controlled to ensure that the pressure of the ammonia water and the sprayed ammonia water mist are normal, so as to achieve efficient treatment of the exhaust gas.

[0039] The number of ammonia spraying devices in each layer is even. The atomizing nozzles 120 of the two gun bodies 100 are close to the center of the smoke chamber section 900 and are central nozzles. The central nozzles are symmetrically arranged, and the remaining atomizing nozzles 120 are edge nozzles.

[0040] The center spray gun has an outer diameter of ϕ32~ϕ42mm, a nozzle orifice diameter of ϕ1.5~ϕ2.5mm, and a spray angle of 60°~90°; the edge spray gun has an outer diameter of ϕ25~ϕ32mm, a nozzle orifice diameter of ϕ1.0~ϕ1.5mm, and a spray angle of 30°~45°. Initially, the gun body is installed vertically to the 900mm flue section of the smoke chamber. At high flow rates and velocities, the central flow field experiences significant impact, while the edge mixing is insufficient. The center nozzle deflects outward by 10°~20°, with the vertical flue gas flow direction as the 0° reference, and then deflects towards the inner wall of the 900mm flue section to expand the droplet coverage radius. The edge nozzles deflect in the opposite direction by 5°~10° to fill the mixing gap between the center and edge nozzles.

[0041] refer to Figure 2 and 3An ammonia spraying device includes: a spray gun 100, a spray gun base 200, an adjusting component 300, a gun body fixing component 400, and an unlocking component 500. The spray gun base 200 is installed at a preset position in the smoke chamber section 900. The adjusting component 300 and the unlocking component 500 are installed on the spray gun base 200. The spray gun 100 is installed on the spray gun base 200 via the gun body fixing component 400. Ammonia and compressed air are input into the spray gun 100, and the spray gun 100 sprays atomized ammonia mist, which contacts the exhaust gas to treat the exhaust gas. The fixing component 400 secures the spray gun 100, and the adjusting component 300 adjusts the angle of the spray gun 100 to adapt to different exhaust gas flow conditions, improving the efficiency of exhaust gas treatment and ensuring the treatment effect. The unlocking component 500 unlocks the spray gun 100, facilitating its removal during maintenance. Adjusting the angle of the spray gun 100 does not obstruct the remote movement of related components.

[0042] refer to Figures 3 to 5 The spray gun holder 200 includes a base body 210, a large arc hemisphere 220, a mounting shaft 230, symmetrical adjusting rods 240, symmetrical sealing and fixing arc plates 250, and symmetrical bolt mounting plates 260. The base body 210 is installed in the smoke chamber section 900. The base body 210 is provided with a cylindrical groove 211, a hemispherical groove 212, and a cavity 213. The large arc hemisphere 220 is installed in the hemispherical groove 212, isolating the cylindrical groove 211 from the cavity. 213. The curved hemisphere 220 is provided with a mounting hole 221 and a gun body positioning groove 222. The mounting shaft 230 is mounted on the curved hemisphere 220 and rotatably connected to the base 210. The adjusting rod 240 is mounted on the mounting shaft 230 and is provided with an adjusting groove 241. The sealing and fixing arc plate 250 is mounted on the base 210, and the bolt mounting plate 260 is mounted on the base 210. The spray gun base 200 provides a mounting foundation for the spray gun 100. The spray gun 100 is mounted on the curved hemisphere 220. When the adjusting rod 240 swings, the mounting shaft 230 rotates, which drives the curved hemisphere 220 to rotate. The curved hemisphere 220 drives the spray gun 100 to swing, thereby realizing the angle adjustment of the spray gun 100 and realizing the treatment of exhaust gas according to the exhaust gas flow rate.

[0043] refer to Figure 3 and 6The spray gun 100 includes a gun body 110, an atomizing nozzle 120, a sealing movable arc plate 130, and a gun body positioning block 140. The atomizing nozzle 120 is disposed at the end of the gun body 110. The gun body 110 is sealed within the mounting hole 221. The air inlet end of the gun body 110 is connected to a gas metal hose 840, and the liquid inlet end is connected to a liquid metal hose 830. The sealing movable arc plate 130 is mounted on the gun body 110 and abuts against the sealing fixed arc plate 250. The sealing movable arc plate 130 is slidably disposed on the sealing fixed arc plate 250. The surface material of the sealing movable arc plate 130 is rubber, and the surface of the sealing fixed arc plate 250 is smooth. After the spray gun 100 is installed in place, the surface of the sealing movable arc plate 130 undergoes elastic deformation to achieve a seal. The gun body positioning block 140 is mounted on the gun body 110 and is inserted into the gun body positioning groove 222.

[0044] refer to Figure 3 and 6 When installing the spray gun 100, the gun body positioning block 140 is inserted into the gun body positioning groove 222 to position the gun body 100, improving installation efficiency. When the spray gun 100 swings, the spray angle of the atomizing nozzle 120 can be flexibly adjusted, and the sealing moving arc plate 130 moves along the sealing fixed arc plate 250. The curved hemisphere 220 and the base 210, and the gun body 110 and the hemisphere 220 form the first sealing structure. The sealing moving arc plate 130 and the sealing fixed arc plate 250 maintain tight contact during operation, forming a continuous and reliable second sealing structure. This enhances the redundancy of the sealing system, significantly preventing high-temperature, dusty, or corrosive fumes from leaking outwards along the swing gap, thus protecting the external working environment and surrounding components. The intermediate area between the two sealing structures becomes a relatively closed buffer zone, helping to improve the service life and operational reliability of related components within it, reducing maintenance frequency and operating costs.

[0045] refer to Figure 2 and 3The adjustment assembly 300 includes a telescopic rod 310, two power rods 320, and a telescopic guide rod 330. The fixed ends of the telescopic rod 310 and the telescopic guide rod 330 are mounted on the base 210, and the free ends of the telescopic rod 310 and the telescopic guide rod 330 are respectively mounted with the power rods 320. The power rods 320 are slidably disposed within the adjustment groove 241. The telescopic rod 310 can be an electric push rod or a hydraulic rod, etc. Controlling the telescopic rod 310 to extend and retract causes the power rod 320 on one side to slide along the adjustment groove 241; the power rod 320 on one side causes the adjustment rod 240 on one side to swing; the adjustment rod 240 causes the mounting shaft 230 and the other adjustment rod 240 on the other side to swing, the other adjustment rod 240 on the other side causes the power rod 320 on the other side to slide along the adjustment groove 241, and the other power rod 320 on the other side causes the telescopic guide rod 330 to extend and retract. The angle adjustment of the atomizing nozzle 120 is achieved by using the adjustment assembly 300.

[0046] refer to Figure 6 The gun body fixing assembly 400 further includes a mounting cylinder 410, a mounting block 420, symmetrical positioning pins 430, symmetrical compression springs 440, and symmetrical compression spring mounting plates 450. The mounting cylinder 410 is mounted on the doubly curved hemisphere 220. The mounting block 420 is inserted into the mounting cylinder 410 and mounted on the gun body 110. The mounting block 420 is provided with a positioning hole 421. The compression spring mounting plate 450 is mounted on the mounting cylinder 410. The positioning pin 430 is inserted into the mounting cylinder 410, the compression spring mounting plate 450, and the positioning hole 421. The positioning pin 430 is provided with a hook groove 431. One end of the compression spring 440 is connected to the positioning pin 430, and the other end is connected to the compression spring mounting plate 450. The compression spring 440 is looped around the positioning pin 430. When installing the gun body 100, the mounting block 420 is inserted into the mounting cylinder 410, and the gun body positioning block 140 is fully inserted into the gun body positioning groove 222. The positioning hole 421 and the positioning pin 430 are then aligned. The positioning pin 430 is inserted into the positioning hole 421, and the compression spring 440 is compressed, ensuring the positioning pin 430 is stably inserted into the positioning hole 421. By setting the gun body fixing assembly 400, the spray gun 100 can be securely installed in the working position, ensuring the stability of the spraying operation. The compression spring 440 continuously applies pressure to the positioning pin 430, ensuring it is tightly inserted into the positioning hole 421, achieving a reliable connection between the curved hemisphere 220 and the spray gun 100, preventing loosening due to vibration during equipment operation. This not only ensures a stable connection between the two but also makes the angle adjustment of the atomizing nozzle 120 simpler and more flexible, allowing for precise adjustment at any time according to process requirements.

[0047] refer to Figure 6The mounting block 420 has an arc-shaped end 422. During spray gun 100 installation, after the mounting block 420 enters the mounting cylinder 410, the arc-shaped end 422 contacts the positioning pin 430, causing the positioning pin 430 to move upwards. The positioning pin 430 compresses the spring 440. When the positioning pin 430 disengages from the arc-shaped end 422, it stops moving. When it aligns with the positioning hole 421, the spring 440 returns to its original position, causing the positioning pin 430 to insert into the positioning hole 421 and strike the mounting block 420, accompanied by a slight "click" sound, indicating that the spray gun 100 has been securely locked onto the mounting base. The entire process achieves rapid and reliable installation and fixation of the spray gun 100, balancing ease of operation and safety.

[0048] refer to Figure 7 and 8 The unlocking assembly 500 includes a guide cylinder 510, an unlocking rod 520, a spring 530, a connecting rod 540, a hook 550, a locking bolt 560, a power disc 570, and a power connecting rod 580. The guide cylinder 510 is inserted into the seat 210. The unlocking rod 520 is slidably disposed within the guide cylinder 510. One end of the spring 530 is connected to the guide cylinder 510, and the other end is connected to the unlocking rod 520. The spring 530 is looped around the unlocking rod 520. One end of the connecting rod 540 is rotatably connected to the unlocking rod 520, and the other end is rotatably connected to the... The hook 550 is rotatably connected to the guide cylinder 510. When the length of the hook 550 is parallel to the length direction of the guide cylinder 510, the hook 550 is inserted into the hook groove 431. The locking bolt 560 is threadedly connected to the bolt mounting plate 260 and inserted into the fixing hole 511. The power plate 570 is rotatably connected to the base 210. The power connecting rod 580 is L-shaped, with one end rotatably connected to the edge of the power plate 570 and the other end rotatably connected to the unlocking rod 520. The guide cylinder 510 and the base 210, and the unlocking rod 520 and the guide cylinder 510 are sealed at their contact points. After the ammonia injection device is installed, the power plate 570 is horizontal and located on the upper side of the base 210.

[0049] refer to Figure 7 and 8When maintenance is required on the spray gun 100, position the spray gun 100 radially in the smoke chamber section 900. Unscrew the locking bolt 560 from the fixing hole 511. Rotating the power disc 570 causes the power connecting rod 580 to swing, which in turn moves the unlocking rod 520. The unlocking rod 520 stretches the spring 530, causing the connecting rod 520 to swing the connecting rod 540. The connecting rod 540 then swings the hook 550, causing it to insert into the hook slot 431. Continuing to pull the unlocking rod 520 upwards, the unlocking rod 520, guide cylinder 510, connecting rod 540, and hook 550 are all engaged under the resistance of the positioning pin 430. The locating pin 430 moves upward as a whole, pressing the mounting cylinder 410 against the spring 440, allowing the locating pin 430 to be pulled out of the locating hole 421 for easy removal of the spray gun 100. After the spray gun 100 is installed, the unlocking lever 520 is released, the spring 530 and the spring 440 return to their original positions, and the hook 550 disengages from the hook groove 431, allowing the locating pin 430 to insert into the locating hole 421. The guide cylinder 510 is pressed to contact the locating pin 430, ensuring that the locating pin 430 is installed in place. Then, the guide cylinder 510 is moved in the opposite direction, aligning the locking bolt 560 with the fixing hole 511 and tightening it into the fixing hole 511. The unlocking assembly 500 allows the locating pin 430 to be pulled out. The hook 550 can only be aligned and enter the hook groove 431 when the gun body 110 is close to being in a radial position, thus unlocking the device and effectively preventing misoperation, enhancing the safety of the device. Under the action of spring 530, after the unlocking action is completed, hook 550 will automatically return to its original position, away from hook slot 431, to avoid interference with subsequent operations. During the angle adjustment of spray gun 100, there is no contact between positioning pin 430 and hook 550, which ensures smooth adjustment and avoids wear caused by friction, thus extending the service life of the equipment. The overall structure is reasonable, the operation is safe and simple, and it balances stability and flexibility.

[0050] refer to Figure 8 The guide cylinder 510 includes a cylindrical portion 513 and an extrusion block portion 512. The cylindrical portion 513 is inserted into the base 210, the unlocking rod 520 is inserted into the cylindrical portion 511, the fixing hole 511 is provided on the cylindrical portion 513, and the hook 550 is rotatably connected to the cylindrical portion 513. Since the surface material of the sealing moving arc plate 130 is rubber, the positioning pin 430 may be slightly misaligned with the fixing hole 511 during installation. Pressing the guide cylinder 510 inward causes the extrusion block portion 512 to contact the positioning pin 430, forcing it to insert into the fixing hole 511, thus facilitating the installation of the spray gun 100.

[0051] The working principle of this embodiment is as follows: Install the spray gun holder 200 into the preset position of the smoke chamber section 900. The gun body 110 passes through the mounting hole 221, so that the mounting block 420 is inserted into the mounting cylinder 410. After the arc part 422 contacts the positioning pin 430, it drives the positioning pin 430 to move upward. The positioning pin 430 compresses the compression spring 440. When the positioning pin 430 is disengaged from the arc part 422, it stops moving. When it is aligned with the positioning hole 421, the compression spring 440 returns to its original position, so that the positioning pin 430 is inserted into the positioning hole 421 and hits the mounting block 420, accompanied by a slight "click" sound. The gun body positioning block 140 is fully inserted into the gun body positioning groove 222. If the positioning pin 430 cannot be smoothly inserted into the positioning hole 421, press the sealing moving arc plate 130 and press the guide cylinder 510 inward, so that the squeezing block part 512 contacts the positioning pin 430, forcing it to be inserted into the fixing hole 511. Reset the guide cylinder 510 and tighten the locking bolt 560 into the fixing hole 511.

[0052] When the spray gun 100 needs to be removed, the locking bolt 560 is unscrewed from the fixing hole 511. When the power plate 570 is rotated, it drives the power connecting rod 580 to swing. The power connecting rod 580 drives the unlocking rod 520 to move. The unlocking rod 520 stretches the spring 530, causing the unlocking rod 520 to drive the connecting rod 540 to swing. The connecting rod 540 drives the hook 550 to swing, so that it inserts into the hook groove 431. Continue to pull the unlocking rod 520 upward. At this time, under the obstruction of the positioning pin 430, the unlocking rod 520, the guide cylinder 510, the connecting rod 540 and the hook 550 become a whole, causing the positioning pin 430 to move upward. The positioning pin 430 and the mounting cylinder 410 squeeze the compression spring 440, so that the positioning pin 430 is pulled out from the positioning hole 421. The spray gun 100 is removed. The power plate 570 is released, the compression spring 440 and the spring 530 return to their original positions, so that the positioning pin 430 and the hook 550 are reset.

[0053] The air inlet of the gun body 110 is connected to a gas metal hose 840, and the liquid inlet is connected to a liquid metal hose 830.

[0054] The first branch pipe 620 inputs the exhaust gas into the heat exchanger 710, and the ammonia water supply cooling pipe 720 inputs ammonia water into the heat exchanger 710. Heat exchange is completed between the two. The gas is discharged through the first exhaust pipe 711, and the ammonia water enters the temporary storage tank 750 through the first supply branch pipe 732. The second branch pipe 640 provides hot gas to the temporary storage tank 750 to keep the ammonia water inside warm. The water pump 760 operates to draw ammonia water from the temporary storage tank 750 and supply it to the gas and liquid supply mechanism 800. The ammonia water temperature sensor 731 detects the temperature of the ammonia water. When the temperature is low, while ensuring the flow rate, the opening of the first branch pipe control valve 630 is reduced to decrease the exhaust gas supply. When a reduction in flow rate is needed, the opening of the first branch pipe control valve 630 is reduced, and the opening of the liquid solenoid valve 740 is also reduced. The same applies when the flow rate increases. A storage temperature sensor 751 detects the temperature. When the temperature is below a threshold, it controls the opening of the second branch control valve 650 to increase the flow rate of the heat medium into the heat exchange coil of the temporary storage tank, thus providing auxiliary heating to the ammonia water in the tank and stabilizing its temperature within the required range. A level gauge 753 monitors the ammonia water level in the temporary storage tank 750 in real time. The heated ammonia water is fed into the booster pump 810 through the second supply branch pipe 733, and then into the spray gun 100 through the liquid metal hose 830. Compressed air enters the spray gun 100 through the gas solenoid valve 820 and the gas metal hose 840. The gun body 110 mixes the ammonia water and gas, and then sprays it out from the atomizing nozzle 120.

[0055] When the angle of the atomizing nozzle 120 needs to be adjusted, the telescopic rod 310 is controlled to extend and retract. The telescopic rod 310 drives one side power rod 320 to slide along the adjustment groove 241; one side power rod 320 drives one side adjustment rod 240 to swing; the adjustment rod 240 drives the mounting shaft 230 and the other side adjustment rod 240 to swing, the other side adjustment rod 240 drives the other side power rod 320 to slide along the adjustment groove 241, the other side power rod 320 drives the telescopic guide rod 330 to extend and retract, the adjustment rod 240 drives the mounting shaft 230 to rotate, the mounting shaft 230 drives the curved hemisphere 220 to rotate, and the curved hemisphere 220 drives the spray gun 100 to swing. The curved hemisphere 220 and the spray gun 100 drive the gun body fixing assembly 400 to swing, thereby realizing the angle adjustment of the atomizing nozzle 120.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An ammonia water injection device, characterized in that, include: Spray gun (100), spray gun holder (200), and adjustment assembly (300); The spray gun (100) includes a gun body (110) and an atomizing nozzle (120). The atomizing nozzle (120) is disposed at the end of the gun body (110). The air inlet of the gun body (110) is connected to an air source, and the liquid inlet is connected to an ammonia source. The spray gun holder (200) includes a base (210), an arc-shaped hemisphere (220), a mounting shaft (230), and an adjusting rod (240). The base (210) is provided with a cylindrical groove (211), a hemispherical groove (212), and a cavity (213). The arc-shaped hemisphere (220) is disposed in the hemispherical groove (212), isolating the cylindrical groove (211) from the cavity (213). The arc-shaped hemisphere (220) is provided with a mounting hole (221). The gun body (110) is sealed in the mounting hole (221). The mounting shaft (230) is disposed on the arc-shaped hemisphere (220) and rotatably disposed on the base (210). The adjusting rod (240) is disposed on the mounting shaft (230) and is provided with an adjusting groove (241). The adjustment assembly (300) includes a telescopic rod (310) and a power rod (320). The fixed end of the telescopic rod (310) is disposed on the seat (210), and the power rod (320) is disposed on the free end of the telescopic rod (310). The power rod (320) is slidably disposed in the adjustment groove (241).

2. The ammonia injection device according to claim 1, characterized in that: The spray gun (100) further includes a sealing movable arc plate (130), which is disposed on the gun body (110). The spray gun base (200) further includes two sealing fixed arc plates (250), which are disposed on the base body (210). The sealing movable arc plate (130) abuts against the sealing fixed arc plate (250), and the sealing movable arc plate (130) is slidably disposed on the sealing fixed arc plate (250).

3. The ammonia water injection device according to claim 2, characterized in that: It also includes a gun body fixing assembly (400) and an unlocking assembly (500). The gun body fixing assembly (400) further includes a mounting cylinder (410), a mounting block (420), a positioning pin (430), and a compression spring (440). The mounting cylinder (410) is disposed on the dome-shaped hemisphere (220). The mounting block (420) is inserted into the mounting cylinder (410) and disposed on the gun body (110). The mounting block (420) is provided with a positioning hole (421). The positioning pin (430) is inserted into the mounting cylinder (410) and the positioning hole (421). The positioning pin (430) is provided with a hook groove (431). One end of the compression spring (440) is connected to the positioning pin (430), and the other end is connected to the mounting cylinder (410). The unlocking assembly (500) includes a guide cylinder (510), an unlocking rod (520), and a spring. (530), connecting rod (540), hook (550) and locking bolt (560), the guide tube (510) is inserted into the seat (210), the unlocking rod (520) is slidably disposed in the guide tube (510), one end of the spring (530) is connected to the guide tube (510) and the other end is connected to the unlocking rod (520), one end of the connecting rod (540) is rotatably connected to the unlocking rod (520) and the other end is rotatably connected to the hook (550), the hook (550) is rotatably connected to the guide tube (510), when the length of the hook (550) is parallel to the length direction of the guide tube (510), the hook (550) is inserted into the hook groove (431), the locking bolt (560) is threadedly connected to the seat (210) and the locking bolt (560) is inserted into the fixing hole (511).

4. The ammonia injection device according to claim 3, characterized in that: The end of the mounting block (420) is an arc-shaped part (422).

5. The ammonia water injection device according to claim 3, characterized in that: The unlocking assembly (500) also includes a power disc (570) and a power linkage (580). The power disc (570) is rotatably mounted on the seat (210). One end of the power linkage (580) is rotatably mounted on the edge of the power disc (570), and the other end is rotatably mounted on the unlocking rod (520).

6. The ammonia injection device according to claim 1, characterized in that: The spray gun (100) also includes a gun body positioning block (140), which is disposed on the gun body (110). The large arc hemisphere (220) is provided with a gun body positioning groove (222), and the gun body positioning block (140) is inserted into the gun body positioning groove (222).

7. An ammonia water injection system, characterized in that: It includes an exhaust gas duct (600), an ammonia water heating mechanism (700), a gas supply and liquid supply mechanism (800), a number of flue gas analyzers (910), and a number of ammonia water injection devices as described in any one of claims 1 to 6; The exhaust gas duct (600) includes a main duct (610), a first branch duct (620), and a first branch duct control valve (630). The main duct (610) is connected to the smoke chamber section (900), the first branch duct (620) is connected to the main duct (610), and the first branch duct control valve (630) is installed on the first branch duct (620). The ammonia heating mechanism (700) includes a heat exchanger (710), an ammonia supply cooling pipe (720), an ammonia supply heating pipe (730), an ammonia temperature sensor (731), a liquid solenoid valve (740), and a first exhaust pipe (711). The first branch pipe (620) is connected to the air inlet of the heat exchanger (710), the air outlet of the heat exchanger (710) is connected to the first exhaust pipe (711), the ammonia supply cooling pipe (720) is connected to the liquid inlet of the heat exchanger (710), the liquid solenoid valve (740) is installed on the ammonia supply cooling pipe (720), the liquid outlet of the heat exchanger (710) is connected to the ammonia supply heating pipe (730), and the ammonia temperature sensor (731) is installed on the ammonia supply heating pipe (730). The gas and liquid supply mechanism (800) includes a booster pump (810), a gas solenoid valve (820), a liquid metal hose (830), and a gas metal hose (840). The ammonia supply heat pipe (730) is connected to the inlet of the booster pump (810), and the outlet of the booster pump (810) is connected to the liquid inlet of the gun body (110) through the liquid metal hose (830). The gas solenoid valve (820) is connected to the gas source, and the gas solenoid valve (820) is connected to the air inlet of the gun body (110) through the gas metal hose (840). Several of the ammonia water injection devices are arranged in layers along the height direction of the smoke chamber section (900) and are evenly arranged along its circumference. At least one of the flue gas analyzers (910) is located at the center of the smoke chamber section (900), and the remaining flue gas analyzers (910) are arranged in layers along the height direction of the smoke chamber section (900), alternating with the layered ammonia water injection device.

8. The ammonia water injection system according to claim 7, characterized in that: The number of ammonia spraying devices in each layer is even. The atomizing nozzles (120) of the two gun bodies (100) are close to the center of the smoke chamber section (900) and are central nozzles. The remaining atomizing nozzles (120) are edge nozzles.

9. The ammonia water injection system according to claim 7, characterized in that: The ammonia water supply heat pipe (730) includes a first supply branch pipe (732) and a second supply branch pipe (733). The ammonia water heating mechanism (700) also includes a temporary storage tank (750), a water pump (760), a storage temperature sensor (751), and a second exhaust pipe (752). The exhaust gas pipe (600) also includes a second branch pipe (640) and a second branch pipe control valve (650). One end of the first supply branch pipe (732) is connected to the liquid outlet of the heat exchanger (710), and the other end is connected to the liquid inlet of the temporary storage tank (750). The water pump (760) is equipped with... The temporary storage tank (750) is placed on the temporary storage tank (750). One end of the second supply branch pipe (733) is connected to the water pump (760), and the other end is connected to the booster water pump (810). One end of the second branch pipe (640) is connected to the main pipe (610), and the other end is connected to the air inlet of the temporary storage tank (750). The second branch pipe control valve (650) is installed on the second branch pipe (640). The air outlet of the temporary storage tank (750) is connected to the second exhaust pipe (752). The storage temperature sensor (751) is installed inside the temporary storage tank (750).

10. The ammonia water injection system according to claim 9, characterized in that: The ammonia heating mechanism (700) also includes a level gauge (753), which is located inside the temporary storage tank (750).

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