Flue gas denitration grading ammonia spraying device

Abstract

The utility model relates to a flue gas denitration grading ammonia spraying device which comprises a gas-liquid mixer, a liquid inlet, a gas inlet, a convenient installation structure, a gun barrel and a nozzle, through the arrangement of the convenient installation structure, a penetrating seat can be pushed to the periphery of a clamping sleeve joint, and a movable clamping sleeve can conveniently select a clamping groove different from the clamping sleeve joint for installation. A worker rotates the rotating handle, the taper pin rotates along with rotation of the rotating handle and is downwards embedded and pressed into the taper sleeve, strong clamping force can be generated between the taper sleeve and the taper pin, the movable clamping sleeve is fixedly installed outside the clamping sleeve connector, the position of the gun barrel is stably installed and limited, and therefore installation of the gun barrel is simplified, and installation efficiency is improved. And meanwhile, the length distances of the gun barrel, the nozzle and the gas-liquid mixer can be flexibly adjusted.

Description

Technical Field

[0001] This utility model relates to the technical field of ammonia injection devices, specifically a flue gas denitrification and staged ammonia injection device. Background Technology

[0002] The working principle of the denitrification spray gun is to atomize a reducing agent containing amino acids (such as urea solution or ammonia water) and spray it into the flue gas area at a suitable temperature (generally 850-1100℃). Under this temperature environment, the reducing agent reacts chemically with the ammonia oxides in the flue gas, reducing the ammonia oxides to nitrogen and water, thereby removing nitrogen oxides from the flue gas.

[0003] Existing flue gas denitrification and ammonia injection staged injection devices are mostly optimized by reducing the residual content of harmful gases and improving the reaction efficiency of the device. For example, Chinese utility model patent application number CN202420149178.1 discloses "A Flue Gas Denitrification and Ammonia Injection Staged Injection Device for Thermal Power Plants". In this device, there is a treatment box and an ammonia injection grid. An air inlet pipe is set on the right side of the treatment box, and a fan is set at the top of the inside of the treatment box. There are two fans. An isolation filter is set below the fan. The ammonia injection grid is set below the isolation filter. A catalyst layer is set at the bottom of the inside of the treatment box, and a gas guide pipe is set on the right side of the treatment box. A solenoid valve is set on the outside of the gas guide pipe. A drying pipe is set on the right side of the gas guide pipe. A desiccant is set on the left side of the inside of the drying pipe, and a catalyst layer is set on the right side of the inside of the drying pipe. This allows the harmful components inside the flue gas to react more fully and completely under the action of ammonia injection multiple times, reducing the residual content of harmful gases and improving the reaction efficiency of the device.

[0004] Although the aforementioned flue gas denitrification staged ammonia injection device has certain advantages in reducing the residual content of harmful gases and improving the reaction efficiency of the device, it still has certain drawbacks: the spray gun rod of the ammonia injection device has a variety of specifications, and personnel usually need to change the gun rod to carry out ammonia injection operations for different flue gases. The gun rod is fixed in position by installation connectors. The commonly used installation connectors are installed by personnel using screws and bolts. During disassembly and assembly, personnel need to constantly tighten the screws, which consumes manpower and disassembly and assembly time. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To solve the above-mentioned technical problems, this utility model provides a flue gas denitrification staged ammonia injection device.

[0007] (II) Technical Solution

[0008] Based on this, the present invention provides the following technical solution: a flue gas denitrification and ammonia injection stage device, comprising a gas-liquid mixer, a liquid inlet, an air inlet, a convenient installation structure, a gun rod, and a nozzle. The liquid inlet and the air inlet are arranged adjacent to each other. The liquid inlet, the air inlet, and the gas-liquid mixer are integrated into a single structure. The convenient installation structure is installed at the front end of the gas-liquid mixer. The nozzle is bolted to the end of the gun rod.

[0009] Preferably, the convenient installation structure includes a movable sleeve, a sleeve connector, and a through seat. The sleeve connector passes through the interior of the through seat, the movable sleeve is installed on the through seat, and the lower end of the movable sleeve is inserted into the sleeve connector.

[0010] Preferably, the movable sleeve includes a rotating handle, a round rod, a limiting post, a limiting groove, a mounting base, a fixing block, and a positioning structure. The round rod and the rotating handle are an integral structure, and the limiting groove and the limiting post are an integral structure. The rotating handle slides with the limiting post through the round rod, the limiting groove, and the limiting post. The lower end of the limiting post is fixedly connected to the mounting base. The fixing block is welded to the lower part of the mounting base. The positioning structure passes through the interior of the mounting base and the fixing block, and the upper end of the positioning structure is connected to the top of the interior of the rotating handle.

[0011] Preferably, the positioning structure includes a tapered pin, a threaded post, a first spring, and a connecting block. The tapered pin is welded to the lower end of the threaded post, the upper end of the threaded post is fixedly connected to the connecting block, and the first spring is wound between the connecting block and the threaded post.

[0012] Preferably, the ferrule connector includes a sleeve frame, a conical sleeve, and a second spring. The conical sleeve is embedded inside the sleeve frame, and the second spring is located on the lower left and right sides of the conical sleeve.

[0013] Preferably, the ferrule connector is fixedly connected to the front end of the gas-liquid mixer and communicates internally with it. One side of the through seat is fixedly connected to the gun rod. The ferrule connector is provided with four slots to facilitate the movable ferrule to be adjusted in position before locking, so that the gun rod can be installed and connected to the gas-liquid mixer.

[0014] Preferably, the mounting bolt is installed on the through seat, the fixing block is embedded and fixed in the through seat, the positioning structure is engaged with the ferrule connector, the rotating handle is rotated and limited under the sliding cooperation of the round rod and the limiting groove, and the rotation angle of the rotating handle is sixty degrees, and it can be moved up and down.

[0015] Preferably, the outer periphery of the threaded post engages with the inner wall of the fixed block, the upper end of the connecting block is connected to the top of the inner side of the rotating handle, and the conical pin rotates and moves up and down as the threaded post rotates with the rotating handle.

[0016] Preferably, one end of the sleeve is fixedly connected to the front end of the gas-liquid mixer, the conical sleeve is pressed against the conical pin, the conical sleeve has four locations, is made of soft resin and has stress, and the conical sleeve on the rotating handle allows the conical pin to be selected in the lateral position, which is convenient for adjusting the length and distance between the gun rod, the nozzle and the gas-liquid mixer.

[0017] Preferably, the gun barrel is made of stainless steel or other high-temperature and corrosion-resistant materials, and is used to manufacture and fix other components.

[0018] Preferably, the liquid inlet is used to deliver the denitrification agent, and the air inlet is used to deliver compressed air.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, the present invention provides a flue gas denitrification staged ammonia injection device, which has the following beneficial effects:

[0021] 1. This flue gas denitrification staged ammonia injection device uses ammonia water or urea solution as a denitrification agent. The air inlet is connected to the denitrification agent filling tank to be input, and the liquid inlet is connected to the container to be input compressed gas. The flow rate and pressure of the gas and liquid are controlled by the gas-liquid mixer, and both are delivered to the nozzle through the gun rod. The nozzle is sprayed into the flue gas through its structure. The ammonia in the ammonia water or urea solution neutralizes the nitrogen oxides in the flue gas, thereby reducing the nitrogen oxides.

[0022] 2. This flue gas denitrification and ammonia injection stage device features a convenient installation structure. The through-body can be pushed to the outer periphery of the ferrule connector, allowing the movable ferrule to be installed in a different slot than the ferrule connector. By rotating the rotating handle, the conical pin rotates with the rotating handle and is pressed downward into the conical sleeve. A strong clamping force is generated between the conical sleeve and the conical pin, fixing the movable ferrule to the outside of the ferrule connector. This provides a stable installation and limit for the position of the gun rod, simplifying the installation of the gun rod. It also allows for flexible adjustment of the length and distance between the gun rod, nozzle, and gas-liquid mixer. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the convenient installation structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the movable card sleeve of this utility model;

[0026] Figure 4 This is a schematic diagram of the positioning structure of this utility model;

[0027] Figure 5This is a schematic diagram of the structure of the compression fitting of this utility model.

[0028] In the diagram: Gas-liquid mixer-1, liquid inlet-2, air inlet-3, convenient installation structure-4, gun barrel-5, nozzle-6, movable ferrule-41, ferrule connector-42, through seat-43, rotating handle-a1, round rod-a2, limiting post-a3, limiting slide groove-a4, mounting seat-a5, fixing block-a6, positioning structure-a7, conical pin-a71, threaded post-a72, first spring-a73, connecting block-a74, sleeve-q1, conical sleeve-q2, second spring-q3. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-2 The flue gas denitrification and ammonia injection stage includes a gas-liquid mixer 1, a liquid inlet 2, an air inlet 3, a convenient installation structure 4, a gun rod 5, and a nozzle 6. The liquid inlet 2 and the air inlet 3 are arranged adjacent to each other. The liquid inlet 2 and the air inlet 3 are integrated with the gas-liquid mixer 1. The convenient installation structure 4 is installed at the front end of the gas-liquid mixer 1. The nozzle 6 is bolted to the end of the gun rod 5. The convenient installation structure 4 includes a movable clamping sleeve 41, a clamping sleeve connector 42, and a through seat 43. The clamping sleeve connector 42 passes through the interior of the through seat 43, and the movable clamping sleeve 41 is installed on the through seat 43. The lower end of the movable ferrule 41 is inserted into the ferrule connector 42. The ferrule connector 42 is fixedly connected to the front end of the gas-liquid mixer 1 and is internally connected. One side of the through seat 43 is fixedly connected to the gun rod 5. The ferrule connector 42 is provided with four slots to facilitate the movable ferrule 41 to be locked in place after the position is adjusted, so that the gun rod 5 can be installed and connected to the gas-liquid mixer 1. The gun rod 5 is made of stainless steel or other high temperature and corrosion resistant materials and is used to manufacture and fix other components. The liquid inlet 2 is used to deliver the denitrification agent and the air inlet 3 is used to deliver compressed air.

[0031] Please see Figure 3-4The flue gas denitrification and ammonia injection stage device includes a movable clamp 41 comprising a rotating handle a1, a round rod a2, a limiting post a3, a limiting groove a4, a mounting base a5, a fixing block a6, and a positioning structure a7. The round rod a2 and the rotating handle a1 are integrated, as are the limiting groove a4 and the limiting post a3. The rotating handle a1 slides through the round rod a2, the limiting groove a4, and the limiting post a3. The lower end of the limiting post a3 is fixedly connected to the mounting base a5. The fixing block a6 is welded to the lower part of the mounting base a5. The positioning structure a7 passes through the interior of the mounting base a5 and the fixing block a6. The upper end of the positioning structure a7 is connected to the top of the interior of the rotating handle a1. The positioning structure a7 includes a tapered pin a71, a threaded post a72, a first spring a73, and a connecting block a74. 71 is welded to the lower end of the threaded column a72. The upper end of the threaded column a72 is fixedly connected to the connecting block a74. A first spring a73 is wound between the connecting block a74 and the threaded column a72. The mounting seat a5 is bolted on the through seat 43. The fixing block a6 is embedded and fixed in the through seat 43. The positioning structure a7 is pressed and engaged with the ferrule connector 42. The rotating handle a1 is rotated and limited under the sliding cooperation of the round rod a2 and the limiting slide groove a4. The rotation angle of the rotating handle a1 is sixty degrees and it can move up and down. The outer periphery of the threaded column a72 is engaged with the inner wall of the fixing block a6. The upper end of the connecting block a74 is connected to the inner top of the rotating handle a1. The tapered pin a71 rotates and moves up and down with the rotating handle a1 and the threaded column a72 rotates.

[0032] Please see Figure 5 The flue gas denitrification and ammonia injection stage device includes a sleeve connector 42 comprising a sleeve frame q1, a conical sleeve q2, and a second spring q3. The conical sleeve q2 is embedded inside the sleeve frame q1, and the second spring q3 is located on the lower left and right sides of the conical sleeve q2. One end of the sleeve frame q1 is fixedly connected to the front end of the gas-liquid mixer 1. The conical sleeve q2 is pressed against the conical pin a71. The conical sleeve q2 has four locations, is made of soft resin, and has stress. The conical sleeve q2 is positioned on the rotating handle a1 to allow the conical pin a71 to be selected laterally, which facilitates the adjustment of the length distance between the gun rod 5, the nozzle 6, and the gas-liquid mixer 1.

[0033] In summary, ammonia or urea solution is used as the denitrification agent. The air inlet 3 is connected to the denitrification agent filling tank, and the liquid inlet 2 is connected to the container of compressed gas. The gas-liquid mixer 1 controls the flow rate and pressure of the gas and liquid to achieve staged ammonia injection control. Both are delivered to the nozzle 6 through the gun rod 5 and sprayed into the flue gas through the structure of the nozzle 6. The ammonia in the ammonia or urea solution neutralizes the nitrogen oxides in the flue gas, thereby reducing nitrogen oxides. A convenient installation structure 4 is provided. Before the ammonia injection operation, one side of the ferrule connector 42 is fixedly connected to the front end of the gas-liquid mixer 1. Then, the specifications of the gun rod 5 are selected, and the gun rod 5 is installed at the front end of the gas-liquid mixer 1 through the movable ferrule 41. The through seat 43 can be pushed to the outer periphery of the ferrule connector 42, which allows the movable ferrule 41 to be installed in a different slot than the ferrule connector 42. After selecting the installation position of the gun rod 5, the operator rotates the rotating handle a1 to drive the round rod a2 along the... The limiting groove a4 allows for displacement, enabling the rotating handle a1 to rotate 60 degrees and move vertically. Through the connection between the connecting block a74 and the threaded post a72, the tapered pin a71 rotates with the rotating handle a1. During rotation, the threaded post a72 engages with the fixed block a6, allowing it to move vertically as well. As the tapered pin a71 rotates and moves with the threaded post a72, it is pressed downwards into the tapered sleeve q2, gradually applying a pushing force to the side end of the tapered sleeve q2. Under the elastic action of the second spring q3, a strong clamping force can be generated between the conical sleeve q2 and the conical pin a71, so that the movable sleeve 41 is fixedly installed outside the sleeve joint 42, and the position of the gun rod 5 is stably installed and limited. If the connection between the gun rod 5 and the gas-liquid mixer 1 needs to be changed, the operation is reversed, so that the convenient installation structure 4 can be easily removed from the gas-liquid mixer 1, thereby simplifying the installation of the gun rod 5, and at the same time, the length and distance between the gun rod 5, the nozzle 6 and the gas-liquid mixer 1 can be flexibly adjusted.

[0034] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0035] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flue gas denitrification and ammonia injection staged device, characterized in that: It includes a gas-liquid mixer (1), a liquid inlet (2), an air inlet (3), a convenient installation structure (4), a gun rod (5), and a nozzle (6). The liquid inlet (2) and the air inlet (3) are arranged adjacent to each other. The liquid inlet (2), the air inlet (3), and the gas-liquid mixer (1) are integrated into one structure. The convenient installation structure (4) is installed at the front end of the gas-liquid mixer (1). The nozzle (6) is bolted to the end of the gun rod (5). The convenient installation structure (4) includes a movable sleeve (41), a sleeve connector (42), and a through seat (43). The sleeve connector (42) passes through the interior of the through seat (43). The movable sleeve (41) is installed on the through seat (43). The lower end of the movable sleeve (41) is inserted into the sleeve connector (42).

2. The flue gas denitrification staged ammonia injection device according to claim 1, characterized in that: The movable sleeve (41) includes a rotating handle (a1), a round rod (a2), a limiting post (a3), a limiting groove (a4), a mounting base (a5), a fixing block (a6), and a positioning structure (a7). The round rod (a2) and the rotating handle (a1) are an integral structure, and the limiting groove (a4) and the limiting post (a3) ​​are an integral structure. The rotating handle (a1) slides through the round rod (a2), the limiting groove (a4), and the limiting post (a3). The lower end of the limiting post (a3) ​​is fixedly connected to the mounting base (a5). The fixing block (a6) is welded to the bottom of the mounting base (a5). The positioning structure (a7) passes through the interior of the mounting base (a5) and the fixing block (a6). The upper end of the positioning structure (a7) is connected to the top of the interior of the rotating handle (a1).

3. The flue gas denitrification staged ammonia injection device according to claim 2, characterized in that: The positioning structure (a7) includes a tapered pin (a71), a threaded post (a72), a first spring (a73), and a connecting block (a74). The tapered pin (a71) is welded to the lower end of the threaded post (a72), and the upper end of the threaded post (a72) is fixedly connected to the connecting block (a74). The first spring (a73) is wound and connected between the connecting block (a74) and the threaded post (a72).

4. The flue gas denitrification staged ammonia injection device according to claim 1, characterized in that: The ferrule connector (42) includes a sleeve frame (q1), a conical sleeve (q2), and a second spring (q3). The conical sleeve (q2) is embedded inside the sleeve frame (q1), and the second spring (q3) is located on the lower left and right sides of the conical sleeve (q2).

5. The flue gas denitrification staged ammonia injection device according to claim 1, characterized in that: The ferrule connector (42) is fixedly connected to the front end of the gas-liquid mixer (1) and communicates internally with it. One side of the through seat (43) is fixedly connected to the gun barrel (5).

6. The flue gas denitrification and ammonia injection stage device according to claim 2, characterized in that: The mounting base (a5) is bolted onto the through seat (43), the fixing block (a6) is embedded and fixed in the through seat (43), and the positioning structure (a7) is engaged with the ferrule connector (42).

7. The flue gas denitrification staged ammonia injection device according to claim 3, characterized in that: The outer periphery of the threaded post (a72) engages with the inner wall of the fixed block (a6), and the upper end of the connecting block (a74) is connected to the top of the inner side of the rotating handle (a1).

8. The flue gas denitrification staged ammonia injection device according to claim 4, characterized in that: One end of the sleeve (q1) is fixedly connected to the front end of the gas-liquid mixer (1), and the conical sleeve (q2) is pressed against the conical pin (a71).

Images