Ammonia injection device for SCR denitration with spoiler structure

Abstract

This utility model relates to the field of atmospheric environmental protection and control technology, and in particular to an ammonia injection device for SCR denitrification with a turbulence structure. It includes a lower housing, a first electric telescopic rod at the top of the lower housing, an upper housing at the outer telescopic end of the first electric telescopic rod, a main ammonia injection pipe connected to the outer side of the lower housing, a branch ammonia injection pipe on the inner side of the lower housing, a nozzle connected to the outer side of the branch ammonia injection pipe, and a turbulence plate on the inner side of the upper housing. During operation, the first electric telescopic rod is retracted to adjust the height of the upper housing, thereby flexibly merging the lower and upper housings. Flue gas is discharged into the lower housing, ammonia is transported from the main ammonia injection pipe to the branch ammonia injection pipe, and then to the nozzle. The nozzle sprays ammonia throughout the lower housing, causing the ammonia to react with the flue gas. The turbulence plate further turbulents the mixed gas, ensuring thorough mixing of ammonia and flue gas, improving ammonia injection performance, and facilitating maintenance and repair.

Description

Technical Field

[0001] This utility model relates to the field of atmospheric environmental protection and control technology, and in particular to an SCR denitrification ammonia injection device with a turbulence structure. Background Technology

[0002] To meet stringent nitrogen oxide emission limits, all on-site denitrification processes employ the SCR (Sequencing and Catalytic Reduction) process.

[0003] Current SCR denitrification mainly involves injecting a reducing agent (ammonia) and mixing it thoroughly with the flue gas before denitrification. The mixture then flows through the surface of the SCR denitrification catalyst, where a chemical reaction occurs under the catalytic action of the catalyst, thereby removing nitrogen oxides from the flue gas. The SCR injection device is generally located at the SCR inlet flue. Due to the large cross-section of the reactor inlet flue, it is often difficult to ensure uniform ammonia injection, which may affect the denitrification effect of the device. Furthermore, most of the injection mechanism is directly installed inside the device, making operation inconvenient during maintenance.

[0004] Therefore, in view of the fact that existing ammonia injection devices often fail to inject ammonia evenly, thus affecting the denitrification effect, a turbulence-inducing ammonia injection device for SCR denitrification can be designed. Through modular disassembly and assembly, installation can be carried out conveniently, maintenance and repair can be facilitated, the service life of the device can be extended, ammonia injection performance can be effectively improved, the mixing efficiency of the denitrification reducing agent and the flue gas before denitrification can be increased, thereby improving the denitrification efficiency, reducing operating costs, and thus effectively enhancing the practical value of the device. Utility Model Content

[0005] To overcome the problems that most SCR injection devices have large reactor inlet flue sections, which often make it difficult to ensure uniform ammonia injection, potentially affecting the denitrification effect, and that the integrated structure makes it difficult to carry out convenient maintenance operations, this utility model is proposed.

[0006] The technical solution of this utility model is as follows: an ammonia injection device for SCR denitrification with a turbulence structure, comprising a lower shell, an air inlet, an upper shell, an air outlet, an ammonia injection main pipe, ammonia injection branch pipes, a nozzle, a control panel, a first electric telescopic rod, a fixing frame, and turbulence plates. The lower shell has an air inlet at its bottom end and a control panel on its outer side. Two sets of first electric telescopic rods are symmetrically arranged at the top of the lower shell. The upper shell is located at the outer telescopic end of the first electric telescopic rods. The top of the upper shell has an air outlet. The ammonia injection main pipe is connected through to one outer end of the lower shell. Multiple sets of ammonia injection branch pipes are equidistantly arranged on the inner side of the lower shell. A nozzle is connected through to the outer side of each ammonia injection branch pipe. A fixing frame is located on the inner side of the upper shell. Multiple sets of turbulence plates are equidistantly arranged at the top of the fixing frame.

[0007] Preferably, flue gas is discharged into the device through the air inlet of the lower shell. The control panel sends a telescopic command to the first electric telescopic rod, which adjusts the height of the upper shell, thereby flexibly merging or separating the lower and upper shells. Ammonia is delivered to the ammonia injection branch pipe through the ammonia injection main pipe, and then to the nozzle through the ammonia injection branch pipe. The nozzle injects ammonia into the lower shell, causing the ammonia to react with the flue gas. A baffle is fixed above the ammonia injection branch pipe by a fixing frame, and the baffle is used to turbulent the mixed gas to ensure that the ammonia and flue gas are fully mixed. The mixed gas is discharged from the device through the air outlet of the upper shell, thereby extending the service life, facilitating maintenance and repair, effectively improving ammonia injection performance, increasing denitrification efficiency, reducing operating costs, and enhancing the practical value of the device.

[0008] Preferably, the control panel is electrically connected to the first electric telescopic rod, and multiple sets of nozzles are provided. The nozzles are distributed in a threaded manner on the upper half of the outer surface of the ammonia injection branch pipe, and the baffle is corrugated.

[0009] Preferably, the outer side of the upper housing is provided with multiple sets of storage seats, the inner side of the storage seats is provided with a second electric telescopic rod, the second electric telescopic rod is electrically connected to the control panel, and the outer telescopic end of the second electric telescopic rod is provided with a U-shaped card plate, which is engaged with the fixed frame.

[0010] Preferably, the top of the fixed frame has multiple sets of slots at equal intervals, and the bottom of both sides of the spoiler has two sets of mounting plates symmetrically arranged. The mounting plates are fitted and connected with the slots, and the outer side of the mounting plates has two sets of locking bolts symmetrically arranged. The locking bolts are threadedly connected to the fixed frame and the mounting plates.

[0011] Preferably, a sealing groove is provided at the top of the lower housing, and a sealing strip is provided at the bottom of the upper housing, with the sealing strip fitting into the sealing groove.

[0012] Preferably, a regulating valve is provided on the outside of the ammonia injection main pipe, which is electrically connected to the control panel. A gas distribution box is provided on the inside of the lower housing. One end of the ammonia injection main pipe is connected to the gas distribution box, and the gas distribution box is connected to one end of the ammonia injection branch pipe.

[0013] Preferably, a support frame is provided on the outer side of the lower housing, the outer fixed end of the first electric telescopic rod is provided at the top of the support frame, a support frame is provided on the outer side of the upper housing, and the outer telescopic end of the first electric telescopic rod is fixedly connected to the bottom end of the support frame.

[0014] The beneficial effects of this utility model are:

[0015] During operation, the control panel sends extension / retraction commands to the first electric telescopic rod, retracting the rod to adjust the height of the upper housing. This allows for flexible merging of the lower and upper housings, discharging flue gas through the inlet into the lower housing. Ammonia is then delivered from the main ammonia injection pipe to the branch pipe, and from there to the nozzles. The nozzles spray ammonia evenly within the lower housing, allowing it to react with the flue gas. A baffle plate on the fixed frame turbulent the mixture, ensuring thorough mixing. The mixture is then discharged from the upper housing through the outlet. This system addresses the common problem in most SCR injection systems: uneven ammonia injection, which can affect denitrification efficiency and inconvenience during maintenance. This enhances the practical value of the system. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the SCR denitrification ammonia injection device with a turbulence structure according to this utility model.

[0017] Figure 2 The diagram shown is a three-dimensional cross-sectional view of the SCR denitrification ammonia injection device with a turbulence structure according to this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional structural schematic of the ammonia injection pipe with a turbulence-inducing structure for an SCR denitrification ammonia injection device of this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional cross-sectional view of the upper shell of the SCR denitrification ammonia injection device with a turbulence structure according to this utility model.

[0020] Figure 5 The diagram shown is a three-dimensional structural schematic of the baffle plate with a turbulence-injecting structure for an SCR denitrification ammonia gas injection device according to this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Lower housing; 101. Support frame; 2. Air inlet; 3. Control panel; 4. First electric telescopic rod; 5. Upper housing; 501. Support frame; 502. Sealing groove; 503. Sealing strip; 6. Air outlet; 7. Ammonia injection main pipe; 701. Regulating valve; 702. Gas distribution box; 8. Ammonia injection branch pipe; 9. Nozzle; 10. Fixing frame; 1001. Storage base; 1002. Second electric telescopic rod; 1003. U-shaped clamping plate; 11. Baffle plate; 1101. Slot; 1102. Mounting plate; 1103. Locking bolt. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Example 1

[0024] Please see Figure 1 and Figure 2 This utility model provides an embodiment of an SCR denitrification ammonia injection device with a turbulence structure, comprising a lower housing 1, an air inlet 2, an upper housing 5, an air outlet 6, an ammonia injection main pipe 7, an ammonia injection branch pipe 8, a nozzle 9, a control panel 3, a first electric telescopic rod 4, a fixing frame 10, and a turbulence plate 11. The air inlet 2 is located at the bottom of the lower housing 1, and the control panel 3 is located on the outer side of the lower housing 1. Two sets of first electric telescopic rods 4 are symmetrically arranged at the top of the lower housing 1. The control panel 3 is electrically connected to the first electric telescopic rods 4. The outer telescopic end of the first electric telescopic rod 4 is provided with an upper housing 5, and the top of the upper housing 5 is provided with an air outlet 6. The outer end of the lower housing 1 is connected to a main ammonia injection pipe 7. Multiple sets of ammonia injection branch pipes 8 are equidistantly arranged on the inner side of the lower housing 1. The outer side of the ammonia injection branch pipe 8 is connected to a nozzle 9. Multiple sets of nozzles 9 are provided. The nozzles 9 are distributed in a spiral shape on the upper half of the outer surface of the ammonia injection branch pipe 8. The inner side of the upper housing 5 is provided with a fixing frame 10. Multiple sets of baffles 11 are equidistantly arranged on the top of the fixing frame 10. The baffles 11 are corrugated.

[0025] Please see Figure 1 and Figure 3 In this embodiment, a sealing groove 502 is provided at the top of the lower housing 1, and a sealing strip 503 is provided at the bottom of the upper housing 5. The sealing strip 503 is fitted and connected to the sealing groove 502. When the upper housing 5 and the lower housing 1 are joined, the sealing strip 503 is embedded in the sealing groove 502, thereby enhancing the sealing performance at the joint between the upper housing 5 and the lower housing 1. A regulating valve 701 is provided on the outside of the ammonia injection main pipe 7. The regulating valve 701 is electrically connected to the control panel 3. A gas equalization box 702 is provided on the inside of the lower housing 1. One end of the ammonia injection main pipe 7 is connected to the gas equalization box 702. The gas equalization box 702 is connected to one end of the ammonia injection branch pipe 8. The control panel 3 controls the opening of the regulating valve 701 according to the flue gas intake of the air inlet 2. The regulating valve 701 controls the intake of the ammonia injection main pipe 7. Ammonia is transported from the ammonia injection main pipe 7 to the gas equalization box 702. The gas equalization box 702 evenly transports the ammonia to the ammonia injection branch pipe 8.

[0026] A support frame 101 is provided on the outer side of the lower housing 1. The outer fixed end of the first electric telescopic rod 4 is provided at the top of the support frame 101. A support frame 501 is provided on the outer side of the upper housing 5. The outer telescopic end of the first electric telescopic rod 4 is fixedly connected to the bottom end of the support frame 501. The lower housing 1 is supported and fixed by the support frame 101 to ensure stable placement of the device. The upper housing 5 is fixedly connected by the support frame 501, thereby achieving the effect of synchronously raising and lowering the upper housing 5 by extending and retracting the first electric telescopic rod 4.

[0027] Before the device is put into operation, the lower housing 1 is supported and fixed by the support frame 101 to ensure that the device is placed stably. The control panel 3 sends a retraction command to the first electric telescopic rod 4, and the first electric telescopic rod 4 is retracted to lower the height of the upper housing 5 on the support frame 501, so that the sealing strip 503 is embedded in the sealing groove 502, and the lower housing 1 and the upper housing 5 are merged.

[0028] When the device is running, the flue gas is discharged into the lower housing 1 through the air inlet 2. The opening of the regulating valve 701 is controlled by the control panel 3. The ammonia gas is delivered to the gas distribution box 702 through the ammonia injection main pipe 7. The gas distribution box 702 delivers the ammonia gas evenly to the ammonia injection branch pipe 8. The ammonia gas is delivered to the nozzle 9 through the ammonia injection branch pipe 8. The nozzle 9 sprays ammonia gas all over the lower housing 1, so that the ammonia gas reacts with the flue gas. The mixed gas is turbulent by the baffle 11 on the fixed frame 10. Finally, the mixed gas is discharged from the air outlet 6 of the upper housing 5.

[0029] Example 2

[0030] Please see Figure 1 and Figure 2 This utility model provides an embodiment of an SCR denitrification ammonia injection device with a turbulence structure, comprising a lower housing 1, an air inlet 2, an upper housing 5, an air outlet 6, an ammonia injection main pipe 7, an ammonia injection branch pipe 8, a nozzle 9, a control panel 3, a first electric telescopic rod 4, a fixing frame 10, and a turbulence plate 11. The air inlet 2 is located at the bottom of the lower housing 1, and the control panel 3 is located on the outer side of the lower housing 1. Two sets of first electric telescopic rods 4 are symmetrically arranged at the top of the lower housing 1. The control panel 3 is electrically connected to the first electric telescopic rods 4. The outer telescopic end of the first electric telescopic rod 4 is provided with an upper housing 5, and the top of the upper housing 5 is provided with an air outlet 6. The outer end of the lower housing 1 is connected to a main ammonia injection pipe 7. Multiple sets of ammonia injection branch pipes 8 are equidistantly arranged on the inner side of the lower housing 1. The outer side of the ammonia injection branch pipe 8 is connected to a nozzle 9. Multiple sets of nozzles 9 are provided. The nozzles 9 are distributed in a spiral shape on the upper half of the outer surface of the ammonia injection branch pipe 8. The inner side of the upper housing 5 is provided with a fixing frame 10. Multiple sets of baffles 11 are equidistantly arranged on the top of the fixing frame 10. The baffles 11 are corrugated.

[0031] Please see Figure 4In this embodiment, multiple sets of storage seats 1001 are provided on the outer side of the upper housing 5, and a second electric telescopic rod 1002 is provided on the inner side of the storage seat 1001. The second electric telescopic rod 1002 is electrically connected to the control panel 3. A U-shaped clamping plate 1003 is provided at the outer telescopic end of the second electric telescopic rod 1002. The U-shaped clamping plate 1003 is engaged with the fixing frame 10. The position of the second electric telescopic rod 1002 is fixed by the storage seat 1001. The control panel 3 sends a telescopic command to the second electric telescopic rod 1002 to adjust the position of the U-shaped clamping plate 1003. The U-shaped clamping plate 1003 is flexibly stored in the storage seat 1001. The U-shaped clamping plate 1003 engages with the fixing frame 10, thereby conveniently installing the spoiler 11 on the fixing frame 10 into the upper housing 5.

[0032] Please see Figure 1 and Figure 3 In this embodiment, a sealing groove 502 is provided at the top of the lower housing 1, and a sealing strip 503 is provided at the bottom of the upper housing 5. The sealing strip 503 is fitted and connected to the sealing groove 502. When the upper housing 5 and the lower housing 1 are joined, the sealing strip 503 is embedded in the sealing groove 502, thereby enhancing the sealing performance at the joint between the upper housing 5 and the lower housing 1. A regulating valve 701 is provided on the outside of the ammonia injection main pipe 7. The regulating valve 701 is electrically connected to the control panel 3. A gas equalization box 702 is provided on the inside of the lower housing 1. One end of the ammonia injection main pipe 7 is connected to the gas equalization box 702. The gas equalization box 702 is connected to one end of the ammonia injection branch pipe 8. The control panel 3 controls the opening of the regulating valve 701 according to the flue gas intake of the air inlet 2. The regulating valve 701 controls the intake of the ammonia injection main pipe 7. Ammonia is transported from the ammonia injection main pipe 7 to the gas equalization box 702. The gas equalization box 702 evenly transports the ammonia to the ammonia injection branch pipe 8.

[0033] A support frame 101 is provided on the outer side of the lower housing 1. The outer fixed end of the first electric telescopic rod 4 is provided at the top of the support frame 101. A support frame 501 is provided on the outer side of the upper housing 5. The outer telescopic end of the first electric telescopic rod 4 is fixedly connected to the bottom end of the support frame 501. The lower housing 1 is supported and fixed by the support frame 101 to ensure stable placement of the device. The upper housing 5 is fixedly connected by the support frame 501, thereby achieving the effect of synchronously raising and lowering the upper housing 5 by extending and retracting the first electric telescopic rod 4.

[0034] Before the device is put into operation, the lower housing 1 is supported and fixed by the support frame 101 to ensure that the device is placed stably. The spoiler 11 on the fixing frame 10 is installed into the upper housing 5. The control panel 3 sends an extension command to the second electric telescopic rod 1002. The second electric telescopic rod 1002 is extended to move the U-shaped clamp 1003 out of the storage seat 1001. The fixing frame 10 is then inserted into the U-shaped clamp 1003 to complete the installation of the spoiler 11. In this embodiment, the spoiler 11 can be disassembled and installed from inside the device, making it convenient to carry out maintenance and repair work.

[0035] Subsequently, the control panel 3 sends a retraction command to the first electric telescopic rod 4, retracting the first electric telescopic rod 4 to lower the height of the upper housing 5 on the support frame 501, so that the sealing strip 503 is embedded in the sealing groove 502, and the lower housing 1 and the upper housing 5 are merged.

[0036] When the device is running, the flue gas is discharged into the lower housing 1 through the air inlet 2. The opening of the regulating valve 701 is controlled by the control panel 3. The ammonia gas is delivered to the gas distribution box 702 through the ammonia injection main pipe 7. The gas distribution box 702 delivers the ammonia gas evenly to the ammonia injection branch pipe 8. The ammonia gas is delivered to the nozzle 9 through the ammonia injection branch pipe 8. The nozzle 9 sprays ammonia gas all over the lower housing 1, so that the ammonia gas reacts with the flue gas. The mixed gas is turbulent by the baffle 11 on the fixed frame 10. Finally, the mixed gas is discharged from the air outlet 6 of the upper housing 5.

[0037] Example 3

[0038] Please see Figure 1 and Figure 2 This utility model provides an embodiment of an SCR denitrification ammonia injection device with a turbulence structure, comprising a lower housing 1, an air inlet 2, an upper housing 5, an air outlet 6, an ammonia injection main pipe 7, an ammonia injection branch pipe 8, a nozzle 9, a control panel 3, a first electric telescopic rod 4, a fixing frame 10, and a turbulence plate 11. The air inlet 2 is located at the bottom of the lower housing 1, and the control panel 3 is located on the outer side of the lower housing 1. Two sets of first electric telescopic rods 4 are symmetrically arranged at the top of the lower housing 1. The control panel 3 is electrically connected to the first electric telescopic rods 4. The outer telescopic end of the first electric telescopic rod 4 is provided with an upper housing 5, and the top of the upper housing 5 is provided with an air outlet 6. The outer end of the lower housing 1 is connected to a main ammonia injection pipe 7. Multiple sets of ammonia injection branch pipes 8 are equidistantly arranged on the inner side of the lower housing 1. The outer side of the ammonia injection branch pipe 8 is connected to a nozzle 9. Multiple sets of nozzles 9 are provided. The nozzles 9 are distributed in a spiral shape on the upper half of the outer surface of the ammonia injection branch pipe 8. The inner side of the upper housing 5 is provided with a fixing frame 10. Multiple sets of baffles 11 are equidistantly arranged on the top of the fixing frame 10. The baffles 11 are corrugated.

[0039] Please see Figure 4In this embodiment, multiple sets of storage seats 1001 are provided on the outer side of the upper housing 5, and a second electric telescopic rod 1002 is provided on the inner side of the storage seat 1001. The second electric telescopic rod 1002 is electrically connected to the control panel 3. A U-shaped clamping plate 1003 is provided at the outer telescopic end of the second electric telescopic rod 1002. The U-shaped clamping plate 1003 is engaged with the fixing frame 10. The position of the second electric telescopic rod 1002 is fixed by the storage seat 1001. The control panel 3 sends a telescopic command to the second electric telescopic rod 1002 to adjust the position of the U-shaped clamping plate 1003. The U-shaped clamping plate 1003 is flexibly stored in the storage seat 1001. The U-shaped clamping plate 1003 engages with the fixing frame 10, thereby conveniently installing the spoiler 11 on the fixing frame 10 into the upper housing 5.

[0040] Please see Figure 5 In this embodiment, multiple sets of slots 1101 are equidistantly provided at the top of the fixed frame 10. Two sets of mounting plates 1102 are symmetrically arranged at the bottom of both sides of the spoiler 11. The mounting plates 1102 are fitted and connected to the slots 1101. Two sets of locking bolts 1103 are symmetrically arranged on the outer side of the mounting plates 1102. The locking bolts 1103 are threadedly rotatably connected to the fixed frame 10 and the mounting plates 1102. When installing the spoiler 11, the spoiler 11 is connected and fixed by the mounting plates 1102. The mounting position of the spoiler 11 is determined by the slots 1101. The mounting plates 1102 are embedded into the slots 1101. The mounting plates 1102 are flexibly locked and fixed to the fixed frame 10 by the locking bolts 1103, thereby facilitating the installation and removal of the spoiler 11.

[0041] Please see Figure 1 and Figure 3 In this embodiment, a sealing groove 502 is provided at the top of the lower housing 1, and a sealing strip 503 is provided at the bottom of the upper housing 5. The sealing strip 503 is fitted and connected to the sealing groove 502. When the upper housing 5 and the lower housing 1 are joined, the sealing strip 503 is embedded in the sealing groove 502, thereby enhancing the sealing performance at the joint between the upper housing 5 and the lower housing 1. A regulating valve 701 is provided on the outside of the ammonia injection main pipe 7. The regulating valve 701 is electrically connected to the control panel 3. A gas equalization box 702 is provided on the inside of the lower housing 1. One end of the ammonia injection main pipe 7 is connected to the gas equalization box 702. The gas equalization box 702 is connected to one end of the ammonia injection branch pipe 8. The control panel 3 controls the opening of the regulating valve 701 according to the flue gas intake of the air inlet 2. The regulating valve 701 controls the intake of the ammonia injection main pipe 7. Ammonia is transported from the ammonia injection main pipe 7 to the gas equalization box 702. The gas equalization box 702 evenly transports the ammonia to the ammonia injection branch pipe 8.

[0042] A support frame 101 is provided on the outer side of the lower housing 1. The outer fixed end of the first electric telescopic rod 4 is provided at the top of the support frame 101. A support frame 501 is provided on the outer side of the upper housing 5. The outer telescopic end of the first electric telescopic rod 4 is fixedly connected to the bottom end of the support frame 501. The lower housing 1 is supported and fixed by the support frame 101 to ensure stable placement of the device. The upper housing 5 is fixedly connected by the support frame 501, thereby achieving the effect of synchronously raising and lowering the upper housing 5 by extending and retracting the first electric telescopic rod 4.

[0043] Before the device is put into operation, the lower housing 1 is supported and fixed by the support frame 101 to ensure that the device is placed stably. The mounting plate 1102 is embedded into the slot 1101, and the mounting plate 1102 is flexibly locked and fixed to the fixed frame 10 by the locking bolt 1103. In this embodiment, each spoiler 11 can be disassembled and assembled independently.

[0044] After the spoiler 11 is assembled, the spoiler 11 on the fixing frame 10 is installed into the upper housing 5. The control panel 3 sends an extension command to the second electric telescopic rod 1002. The second electric telescopic rod 1002 is extended to move the U-shaped clamp 1003 out of the storage seat 1001. The fixing frame 10 is then inserted into the U-shaped clamp 1003, thus completing the installation of the spoiler 11.

[0045] Subsequently, the control panel 3 sends a retraction command to the first electric telescopic rod 4, retracting the first electric telescopic rod 4 to lower the height of the upper housing 5 on the support frame 501, so that the sealing strip 503 is embedded in the sealing groove 502, and the lower housing 1 and the upper housing 5 are merged.

[0046] When the device is running, the flue gas is discharged into the lower housing 1 through the air inlet 2. The opening of the regulating valve 701 is controlled by the control panel 3. The ammonia gas is delivered to the gas distribution box 702 through the ammonia injection main pipe 7. The gas distribution box 702 delivers the ammonia gas evenly to the ammonia injection branch pipe 8. The ammonia gas is delivered to the nozzle 9 through the ammonia injection branch pipe 8. The nozzle 9 sprays ammonia gas all over the lower housing 1, so that the ammonia gas reacts with the flue gas. The mixed gas is turbulent by the baffle 11 on the fixed frame 10. Finally, the mixed gas is discharged from the air outlet 6 of the upper housing 5.

[0047] Through the above steps, flue gas is discharged into the device through the air inlet 2 of the lower housing 1. The control panel 3 sends a telescopic command to the first electric telescopic rod 4, which adjusts the height of the upper housing 5, thereby flexibly merging or separating the lower housing 1 and the upper housing 5. Ammonia gas is delivered to the ammonia injection branch pipe 8 through the ammonia injection main pipe 7, and then delivered to the nozzle 9 through the ammonia injection branch pipe 8. The nozzle 9 sprays ammonia gas into the lower housing 1, causing the ammonia gas to react with the flue gas. The baffle 11 is fixed above the ammonia injection branch pipe 8 by the fixing frame 10, and the baffle 11 is used to turbulent the mixed gas to ensure that the ammonia gas and the flue gas are fully mixed. The mixed gas is discharged from the device through the air outlet 6 of the upper housing 5, thereby extending the service life of the device, facilitating maintenance and repair, effectively improving ammonia injection performance, increasing denitrification efficiency, and reducing operating costs.

[0048] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An ammonia injection device for SCR denitration with turbulence structure, comprising a lower shell (1), an air inlet (2), an upper shell (5), an air outlet (6), an ammonia injection main pipe (7), an ammonia injection branch pipe (8), and a nozzle (9), characterized in that: It also includes a control panel (3), a first electric telescopic rod (4), a fixed frame (10) and a spoiler (11). An air inlet (2) is provided at the bottom of the lower housing (1). A control panel (3) is provided on the outside of the lower housing (1). Two sets of first electric telescopic rods (4) are symmetrically arranged at the top of the lower housing (1). An upper housing (5) is provided at the telescopic end of the first electric telescopic rod (4). An air outlet (6) is provided at the top of the upper housing (5). An ammonia injection main pipe (7) is connected through one end of the outer side of the lower housing (1). Multiple sets of ammonia injection branch pipes (8) are equidistantly arranged on the inner side of the lower housing (1). A nozzle (9) is connected through the outer side of the ammonia injection branch pipe (8). A fixed frame (10) is provided on the inner side of the upper housing (5). Multiple sets of spoilers (11) are equidistantly arranged at the top of the fixed frame (10).

2. The ammonia injection device for SCR denitration with the spoiler structure according to claim 1, characterized in that: The control panel (3) is electrically connected to the first electric telescopic rod (4). Multiple sets of nozzles (9) are provided. The nozzles (9) are distributed in a spiral shape on the upper half of the outer surface of the ammonia spraying branch pipe (8). The baffle (11) is corrugated.

3. The ammonia injection device for SCR denitration with the spoiler structure according to claim 1, characterized in that: The outer side of the upper housing (5) is provided with multiple sets of storage seats (1001), and the inner side of the storage seat (1001) is provided with a second electric telescopic rod (1002). The second electric telescopic rod (1002) is electrically connected to the control panel (3). The outer telescopic end of the second electric telescopic rod (1002) is provided with a U-shaped card plate (1003), and the U-shaped card plate (1003) is engaged with the fixed frame (10).

4. The ammonia injection device for SCR denitration with the spoiler structure according to claim 1, characterized in that: The top of the fixed frame (10) has multiple sets of slots (1101) at equal intervals. The bottom of both sides of the spoiler (11) are symmetrically provided with two sets of mounting plates (1102). The mounting plates (1102) are fitted and connected with the slots (1101). The outer side of the mounting plates (1102) is symmetrically provided with two sets of locking bolts (1103). The locking bolts (1103) are threadedly connected to the fixed frame (10) and the mounting plates (1102).

5. The ammonia injection device for SCR denitration with the spoiler structure according to claim 1, characterized in that: The top of the lower housing (1) is provided with a sealing groove (502), and the bottom of the upper housing (5) is provided with a sealing strip (503), which is fitted and connected to the sealing groove (502).

6. The ammonia injection device for SCR de-NOx with turbulence structure according to claim 1, characterized in that: An regulating valve (701) is provided on the outside of the ammonia injection main pipe (7). The regulating valve (701) is electrically connected to the control panel (3). A gas equalization box (702) is provided on the inside of the lower housing (1). One end of the ammonia injection main pipe (7) is connected to the gas equalization box (702). The gas equalization box (702) is connected to one end of the ammonia injection branch pipe (8).

7. The ammonia injection device for SCR de-NOx with turbulence structure according to claim 1, characterized in that: A support frame (101) is provided on the outside of the lower housing (1), and the outer fixed end of the first electric telescopic rod (4) is provided at the top of the support frame (101). A support frame (501) is provided on the outside of the upper housing (5), and the outer telescopic end of the first electric telescopic rod (4) is fixedly connected to the bottom end of the support frame (501).

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