A concentrated liquid in-furnace back spray device

Abstract

This application relates to the field of waste incineration treatment equipment, and in particular to a concentrated liquid in-furnace back-spray device, which includes a nozzle body and a liquid delivery assembly. A nozzle is threadedly installed at the outlet end of the nozzle body, and an air inlet is installed on the outer wall of the nozzle body. The liquid delivery assembly includes a first liquid delivery pipe, a connecting component, a ring, a second liquid delivery pipe, and a hemispherical end cap. The first liquid delivery pipe is installed at the inlet end of the nozzle body. The connecting component, ring, second liquid delivery pipe, and hemispherical end cap are all located inside the nozzle body. The connecting component is threadedly installed at the outlet end of the first liquid delivery pipe. The ring is rotatably mounted on the connecting component. The second liquid delivery pipe is fixedly connected to the ring. A fan blade is fixedly installed on the outer wall of the second liquid delivery pipe. The hemispherical end cap is threadedly installed at the outlet end of the second liquid delivery pipe, and a spray hole is formed on the hemispherical end cap. This application has the effect of enhancing the atomization effect of the spray gun and reducing the risk of internal clogging of the spray gun.

Description

Technical Field

[0001] This application relates to the field of waste incineration treatment equipment, and in particular to a concentrated liquid in-furnace back-spraying device. Background Technology

[0002] During storage, transfer, transportation, and stockpiling, waste generates various metabolic substances and water due to fermentation, organic matter decomposition, and rainwater leaching, forming highly concentrated organic wastewater with extremely complex composition—landfill leachate. Many waste incineration plants are equipped with leachate treatment stations, which typically employ a "pretreatment + anaerobic digestion + MBR (membrane bioreactor) + NF / RO (nanofiltration / reverse osmosis)" process. The NF / RO unit is a membrane separation process that produces approximately 20%–30% post-membrane concentrate. This concentrate contains a large amount of recalcitrant and non-biodegradable organic matter and salts, exhibiting extremely poor biodegradability; especially the RO concentrate, which contains a high concentration of monovalent salts. Therefore, treating the post-membrane concentrate (referred to as concentrate in this invention) is challenging. With increasingly stringent environmental standards and inspections in my country, many waste incineration plants are required to implement "zero discharge" standards, meaning that these concentrates must be completely treated and disposed of within the waste incineration plant and not discharged externally.

[0003] Currently, the industry mainly uses a spray gun to inject the concentrated liquid back into the waste incinerator for incineration. This not only completely eliminates the concentrated liquid generated during the leachate treatment process, achieving "zero emissions" of the concentrated liquid, but also reduces the concentration of nitrogen oxides in the flue gas during waste incineration at the source to meet relevant emission standards.

[0004] The key to concentrated liquid re-spraying is to ensure that the concentrated liquid is fully atomized in order to reduce its impact on the combustion conditions of the incinerator (such as the temperature inside the furnace). However, due to the limitations of its own structure, the existing spray gun has poor atomization effect, and the concentrated liquid is prone to accumulate in the nozzle, which significantly increases the risk of internal blockage or malfunction of the spray gun. Utility Model Content

[0005] To enhance the atomization effect of the spray gun and reduce the risk of internal clogging, this application provides a concentrated liquid in-furnace recirculation device.

[0006] The concentrated liquid in-furnace back-spraying device provided in this application adopts the following technical solution: A concentrated liquid in-furnace back-spray device includes a gun body and a liquid delivery assembly. A nozzle is threadedly installed at the outlet end of the gun body, and an air inlet is installed on the outer wall of the gun body. The liquid delivery assembly includes a first liquid delivery tube, a connecting component, a ring, a second liquid delivery tube, and a hemispherical end cap. The first liquid delivery tube is installed at the inlet end of the gun body. The connecting component, the ring, the second liquid delivery tube, and the hemispherical end cap are all located inside the gun body. The connecting component is threadedly installed at the outlet end of the first liquid delivery tube. The ring is rotatably installed on the connecting component. The second liquid delivery tube is fixedly connected to the ring. A fan blade is fixedly installed on the outer wall of the second liquid delivery tube. The hemispherical end cap is threadedly installed at the outlet end of the second liquid delivery tube, and a spray hole is formed on the hemispherical end cap.

[0007] Optionally, the connecting component includes a threaded part, a connector, and a guide. The connector is located between the threaded part and the guide. Both ends of the connector are fixedly connected to the threaded part and the guide, respectively. The outer diameter of the threaded part is smaller than the outer diameter of the connector. The threaded part is threadedly installed at the outlet end of the first infusion tube. The ring is located between the connector and the first infusion tube and is sleeved on the threaded part.

[0008] Optionally, a connecting plate is fixedly installed on the outer wall of the first infusion tube, and the connecting plate is installed at the inlet end of the gun body by a first bolt.

[0009] Optionally, a flange tube is annularly mounted on the outer wall of the gun body. The flange tube includes a flange and a sleeve, with the flange fixedly mounted at one end of the sleeve.

[0010] Optionally, a placement box is fixedly installed on the sleeve, and a drive motor is fixedly installed inside the placement box. The placement direction of the output end of the drive motor is perpendicular to the projection of the placement direction of the gun body on the horizontal plane. A gear is fixedly installed on the output end of the drive motor. A strip hole is opened on the sleeve, and a tooth groove is opened on the gun body. The gear passes through the strip hole and meshes with the tooth groove.

[0011] Optionally, the placement box includes a box body and a box cover. The box cover is installed on the end of the box body away from the sleeve by a second bolt, and the drive motor is fixedly installed on the box cover.

[0012] Optionally, a guide strip is fixedly installed inside the sleeve, and a guide groove is provided on the gun body. The guide strip is slidably connected to the gun body through the guide groove.

[0013] In summary, this application includes at least one of the following beneficial technical effects: 1. Rotating the second infusion tube causes the concentrated liquid inside the second infusion tube to be spirally sprayed out. After being collided by high-pressure gas, the atomization effect of the spray gun is enhanced and the risk of internal blockage of the spray gun is reduced.

[0014] 2. By setting up a drive motor, the operator can remotely control the movement of the gun body, thereby improving the operator's safety.

[0015] 3. All components of the device in this application are detachable and connectable, making it convenient for staff to replace any damaged component. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a concentrated liquid in-furnace back-spray device according to an embodiment of this application.

[0017] Figure 2 This is a schematic diagram of the infusion assembly of a concentrated liquid in-furnace back-spray device according to an embodiment of this application.

[0018] Figure 3 This is a cross-sectional view of the infusion assembly of a concentrated liquid in-furnace back-spray device according to an embodiment of this application.

[0019] Figure 4 This is an exploded view of the infusion assembly of a concentrated liquid in-furnace back-spray device according to an embodiment of this application.

[0020] Figure 5 This is a schematic diagram of the gun body of a concentrated liquid furnace back-spray device according to an embodiment of this application.

[0021] Figure 6 This is an exploded view of the placement box of a concentrated liquid furnace back spray device according to an embodiment of this application.

[0022] Explanation of reference numerals in the attached drawings: 1. Gun body; 11. Air inlet; 12. Gear groove; 13. Guide groove; 2. Infusion assembly; 21. First infusion tube; 211. Infusion end; 22. Connecting component; 221. Threaded part; 222. Connecting part; 223. Guide part; 24. Ring; 25. Second infusion tube; 251. Fan blade; 26. Hemispherical end cap; 261. Spray hole; 3. Nozzle; 4. Connecting plate; 41. First bolt; 5. Flange pipe; 51. Flange; 52. Sleeve; 521. Strip hole; 522. Guide strip; 6. Placement box; 61. Box body; 62. Box cover; 621. Second bolt; 7. Drive motor; 71. Gear. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0024] This application discloses a concentrated liquid in-furnace back-spray device.

[0025] Reference Figures 1 to 6 A concentrated liquid in-furnace back-spray device includes a gun body and a liquid delivery assembly.

[0026] The gun body 1 has an air inlet 11 fixedly installed on its outer wall, and a nozzle 3 threadedly installed on its outlet end. The infusion assembly 2 includes a first infusion tube 21, a connecting component 22, a ring 24, a second infusion tube 25, and a hemispherical end cap 26. The inlet end of the first infusion tube 21 is fixedly installed with an inlet end 211. The first infusion tube 21 is installed at the inlet end of the gun body 1. The connecting component 22, the ring 24, the second infusion tube 25, and the hemispherical end cap 26 are all located inside the gun body 1. The connecting component 22 is threadedly installed at the outlet end of the first infusion tube 21. The ring 24 is rotatably installed on the connecting component 22. The second infusion tube 25 is fixedly connected to the ring 24. A fan blade 251 is fixedly installed on the outer wall of the second infusion tube 25. The hemispherical end cap 26 is threadedly installed at the outlet end of the second infusion tube 25. The hemispherical end cap 26 has multiple nozzle holes 261.

[0027] The concentrate enters the first delivery pipe 21 through the inlet end 211, and then passes through the connecting component 22 and the second delivery pipe 25 to reach the hemispherical head 26. It is then ejected through the nozzle 261 on the hemispherical head 26. High-pressure gas enters the gun body 1 through the air inlet end 11. The fan blade 251 rotates under the influence of the high-pressure gas, which in turn drives the second delivery pipe 25 to rotate. This rotation of the second delivery pipe 25 creates an axial vortex and axial acceleration within it. Driven by the concentrate within the first delivery pipe 21, the concentrate is forced through the nozzle 261 on the hemispherical head 26 for dispersion and atomization. Simultaneously, the high-pressure gas moves along the axial direction of the gun body 1 towards the outlet end, further atomizing the concentrate passing through the nozzle 261 on the hemispherical head 26 and ejecting it from the nozzle 3. It should be noted that the fan blade 251 drives the second delivery pipe 25 to rotate counterclockwise.

[0028] The connecting component 22 includes a threaded part 221, a connector 222, and a guide 223. The connector 222 is located between the threaded part 221 and the guide 223. Both ends of the connector 222 are fixedly connected to the threaded part 221 and the guide 223, respectively. The outer diameter of the threaded part 221 is smaller than the outer diameter of the connector 222. The threaded part 221 is installed counterclockwise at the outlet end of the first infusion tube 21. A ring 24 is located between the connector 222 and the first infusion tube 21, and the ring 24 is sleeved around the threaded part 221. Both the connector 222 and the guide 223 are located inside the second infusion tube 25. There is a gap between the outer wall of the connector 222 and the inner wall of the second infusion tube 25, which can prevent friction between the connector 222 and the second infusion tube 25, and thus prevent the connector 222 from rotating with the second infusion tube 25. The outer wall of the right end of the guide 223 abuts against the inner wall of the second infusion tube 25. Since the contact area between the two is small, the friction generated can be ignored. Therefore, the guide 223 will not rotate with the second infusion tube 25. At the same time, the guide tube can also prevent the concentrate from flowing back into the gap between the outer wall of the connector 222 and the inner wall of the second infusion tube 25.

[0029] A connecting plate 4 is fixedly installed on the outer wall of the first infusion tube 21. The connecting plate 4 is installed at the inlet end of the gun body 1 by the first bolt 41, which can enhance the stability of the first infusion tube 21.

[0030] The gun body 1 is ring-mounted on the outer wall of the flange pipe 5. The flange pipe 5 includes a flange 51 and a sleeve 52. The flange 51 is fixedly installed on one end of the sleeve 52, and the gun body 1 is installed on the furnace body through the flange.

[0031] A placement box 6 is fixedly installed below the sleeve 52. The placement box 6 includes a box body 61 and a box cover 62. The box cover 62 is installed at the bottom of the box body 61 by a second bolt 621. A drive motor 7 is installed at the top of the box cover 62. The drive motor 7 is located inside the box body 61. The placement direction of the output end of the drive motor 7 is perpendicular to the projection of the placement direction of the gun body 1 on the horizontal plane. A gear 71 is fixedly installed at the output end of the drive motor 7. A strip hole 521 is opened at the bottom of the sleeve 52. A toothed groove 12 is opened on the gun body 1. The gear 71 passes through the strip hole 521 and meshes with the toothed groove 12.

[0032] The drive motor 7 drives the gear 71 to rotate, which in turn moves the gun body 1 left and right without requiring personnel to move it on-site. It's important to note that the drive motor 7 is controlled by a controller (not shown), allowing for remote operation by personnel. Simultaneously, when the gear 71 is not rotating, it effectively secures the gun body 1.

[0033] A guide bar 522 is fixedly installed inside the sleeve 52. A guide groove 13 is provided on the gun body 1. The guide bar 522 is slidably connected to the gun body 1 through the guide groove 13. The guide bar 522 can make the gun body 1 move in a predetermined direction. At the same time, during the installation process, it can make the gear 71 and the tooth groove 12 mesh.

[0034] It should be noted that all components of the device in this application are detachable and connectable, making it convenient for staff to replace any damaged component.

[0035] The implementation principle of the concentrated liquid in-furnace back spray device in this application embodiment is as follows: When the device needs to be installed, first insert the connecting component 22 from the outlet end of the second infusion pipe 25, and slide the threaded part 221 of the connecting component 22 from the inlet end of the second infusion pipe 25. Thread the first infusion pipe 21 and the threaded part 221, and thread the hemispherical end cap 26 onto the outlet end of the second infusion pipe 25 to complete the assembly of the infusion assembly 2. Then slide the infusion assembly 2 into the inlet end of the gun body 1. When the connecting plate 4 on the first infusion pipe 21 abuts against the gun body 1, fix it with the first bolt 41. Thread the nozzle 3 onto the outlet end of the gun body 1. Then slide the gun body 1 into the sleeve 52 according to the guiding direction of the guide bar 522, so that the tooth groove 12 faces downward. Install the box cover 62 onto the box body 61 with the second bolt 621, so that the gear 71 passes through the strip hole 521 and meshes with the tooth groove 12. Finally, install the flange 51 onto the furnace body.

[0036] When this device is needed, the concentrate enters the first delivery pipe 21 through the inlet end 211, and then passes through the connecting component 22 and the second delivery pipe 25 to reach the hemispherical head 26. It is then ejected through the nozzle 261 on the hemispherical head 26. High-pressure gas enters the gun body 1 through the air inlet end 11. The fan blade 251 rotates under the drive of the high-pressure gas, which in turn drives the second delivery pipe 25 to rotate. The rotation of the second delivery pipe 25 generates an axial vortex in the concentrate. Driven by the concentrate in the first delivery pipe 21, the concentrate passes through the nozzle 261 on the hemispherical head 26 and is dispersed and atomized. At the same time, the high-pressure gas also moves along the axial direction of the gun body 1 towards the outlet end of the gun body 1. The high-pressure gas further atomizes the concentrate that has passed through the nozzle 261 on the hemispherical head 26 and ejects it from the nozzle 3.

[0037] 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. A concentrated liquid in-furnace recirculation device, characterized in that: The device includes a gun body (1) and an infusion assembly (2). A nozzle (3) is threaded onto the outlet end of the gun body (1), and an air inlet (11) is installed on the outer wall of the gun body (1). The infusion assembly (2) includes a first infusion tube (21), a connecting component (22), a ring (24), a second infusion tube (25), and a hemispherical end cap (26). The first infusion tube (21) is installed at the inlet end of the gun body (1), and the connecting component (22), ring (24), second infusion tube (25), and hemispherical end cap (26) are also included. The head (26) is located inside the gun body (1). The connecting part (22) is threadedly installed at the outlet end of the first infusion tube (21). The ring (24) is rotatably installed on the connecting part (22). The second infusion tube (25) is fixedly connected to the ring (24). A fan blade (251) is fixedly installed on the outer wall of the second infusion tube (25). The hemispherical end cap (26) is threadedly installed at the outlet end of the second infusion tube (25). A spray hole (261) is opened on the hemispherical end cap (26).

2. The concentrated liquid in-furnace back-spray device according to claim 1, characterized in that: The connecting component (22) includes a threaded part (221), a connector (222), and a guide (223). The connector (222) is located between the threaded part (221) and the guide (223). The two ends of the connector (222) are fixedly connected to the threaded part (221) and the guide (223), respectively. The outer diameter of the threaded part (221) is smaller than the outer diameter of the connector (222). The threaded part (221) is threadedly installed at the outlet end of the first infusion tube (21). The ring (24) is located between the connector (222) and the first infusion tube (21). The ring (24) is sleeved on the threaded part (221).

3. The concentrated liquid in-furnace back-spray device according to claim 1, characterized in that: A connecting plate (4) is fixedly installed on the outer wall of the first infusion tube (21), and the connecting plate (4) is installed at the inlet end of the gun body (1) by a first bolt (41).

4. The concentrated liquid in-furnace back-spray device according to claim 1, characterized in that: The gun body (1) is circumferentially mounted on the outer wall of the flange tube (5). The flange tube (5) includes a flange (51) and a sleeve (52). The flange (51) is fixedly mounted on one end of the sleeve (52).

5. The concentrated liquid in-furnace back-spray device according to claim 4, characterized in that: A placement box (6) is fixedly installed on the sleeve (52), and a drive motor (7) is fixedly installed inside the placement box (6). The placement direction of the output end of the drive motor (7) is perpendicular to the projection of the placement direction of the gun body (1) on the horizontal plane. A gear (71) is fixedly installed on the output end of the drive motor (7). A strip hole (521) is opened on the sleeve (52), and a tooth groove (12) is opened on the gun body (1). The gear (71) passes through the strip hole (521) and meshes with the tooth groove (12).

6. The concentrated liquid in-furnace back-spray device according to claim 5, characterized in that: The placement box (6) includes a box body (61) and a box cover (62). The box cover (62) is installed on the end of the box body (61) away from the sleeve (52) by a second bolt (621). The drive motor (7) is fixedly installed on the box cover (62).

7. The concentrated liquid in-furnace back-spray device according to claim 4, characterized in that: A guide bar (522) is fixedly installed inside the sleeve (52), and a guide groove (13) is provided on the gun body (1). The guide bar (522) is slidably connected to the gun body (1) through the guide groove (13).

Images