SNCR (selective non-catalytic reduction) spray gun for boiler

Abstract

The utility model relates to the technical field of boiler equipment, in particular to an SNCR (selective non-catalytic reduction) spray gun for a boiler, which comprises a boiler body, a mounting plate is mounted on the outer wall of the boiler body, the mounting plate is fixed with the side end of the outer wall of the boiler body through a support, and the side end of the inner wall of the boiler body is fixedly communicated with a guide channel. According to the ammonia water spraying device disclosed by the utility model, the arranged spray head can be adjusted in multiple angles and directions under the action of the rotating motor and the second electric control telescopic rod, so that the ammonia water can be sprayed from multiple angles; according to the hearth temperature, the flue gas index and the like, the spray head can be controlled to spray ammonia, and the liquid conveying pipe and the spray head can be controlled to be retracted into the guide channel for protection, so that when ammonia spraying is not needed, personnel can control the spray head to be retracted into the guide channel, and the situation that the spray head deforms when the boiler body stays in a high-temperature environment for a long time can be avoided; and normal spraying of ammonia water is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler equipment, in particular to an SNCR spray gun for a boiler. Background Art

[0002] The SNCR spray gun is a technology used to reduce nitrogen oxide (NOx) emissions from industrial boilers, incinerators, and other equipment. It works by injecting a reducing agent (usually urea or ammonia) to react with NOx, converting it into harmless nitrogen gas and water.

[0003] The existing SNCR spray guns for boilers are usually fixedly installed at four positions: the two ends, the top and the front end of the inner wall of the boiler, and the spray gun mouth of the SNCR spray gun is mostly fixedly inserted into the boiler. However, the temperature of the boiler is relatively high during normal operation, and the inserted spray gun is deformed and blocked under long-term high-temperature fumigation, resulting in the injection of ammonia water being affected. Therefore, the existing SNCR spray guns still have certain shortcomings.

[0004] In summary, it is necessary to invent a SNCR spray gun for boiler. Utility Model Content

[0005] To this end, the utility model provides an SNCR spray gun for a boiler to solve the problem that the temperature of the boiler is relatively high during normal operation, the inserted spray gun is deformed and blocked under long-term high-temperature fumigation, resulting in affected ammonia injection.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: an SNCR spray gun for a boiler, comprising a boiler body, an outer wall of the boiler body being installed with a mounting plate, the mounting plate being fixed to the side end of the outer wall of the boiler body through a bracket, the side ends of the inner wall of the boiler body being fixedly connected with a guide channel, and the inner walls of the guide channels being provided with a spray gun component for spraying ammonia water.

[0007] Preferably, a liquid separation box is fixedly installed on the outer wall of the mounting plate on one side away from the boiler body, the spray gun component includes a liquid delivery tube, and multiple liquid delivery tubes are arranged in corresponding guide channels. The mounting plate is close to the outer wall of one side of the boiler body and is rotatably connected to the first electrically-controlled telescopic rod at the position corresponding to the liquid delivery tube, and the output shaft of the first electrically-controlled telescopic rod is fixedly connected to the end of the liquid delivery tube.

[0008] Preferably, a liquid inlet is provided on the outer wall of the infusion tube on one side close to the first electrically controlled telescopic rod, and a liquid inlet hose is fixedly connected to the inner wall of the liquid inlet, and the end of the liquid inlet hose away from the liquid inlet is connected to the liquid outlet of the liquid separation box.

[0009] Preferably, a nozzle is provided at one end of the infusion tube inserted into the guide channel, a universal ball head is fixed to the inner wall of the end of the infusion tube close to the nozzle, and a liquid penetration hole is penetrated through the outer wall of the universal ball head.

[0010] Preferably, the inner wall of the nozzle and one end close to the universal ball head is connected to a ball head socket, and the end of the ball head socket away from the nozzle extends into the inner wall of the infusion tube and is rotatably connected to the outer wall of the universal ball head.

[0011] Preferably, one end of a second electrically-controlled telescopic rod is hinged to the upper and lower sides of the outer wall of the infusion tube and one end close to the nozzle, and the output ends of the second electrically-controlled telescopic rod are hinged to the corresponding positions of the upper and lower sides of the outer wall of the nozzle close to the infusion tube.

[0012] Preferably, a rotating motor is fixedly installed on the outer wall of one side of the mounting plate away from the first electrically-controlled telescopic rod and at a position corresponding to the first electrically-controlled telescopic rod, and the output shaft of the rotating motor passes through the side wall of the mounting plate and is fixed to the outer wall of the one side of the first electrically-controlled telescopic rod away from the guide channel.

[0013] Preferably, one end of the guide channel inserted into the first electrically-controlled telescopic rod is hinged with a sealing plate, the side ends of the outer walls of the infusion tubes are rotatably connected to bearing rings, the top ends of the outer walls of the bearing rings are fixed with connecting rods through fixing plates, the top ends of the outer walls of the connecting rods are fixed with sliders, and the top ends of the sliders are slidably connected to the bottom ends of the inner walls of the guide channels.

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

[0015] In the present invention, the nozzle can be adjusted to multiple angles and directions under the action of the rotating motor and the second electrically controlled telescopic rod, so that ammonia water can be sprayed from multiple angles. The nozzle can be controlled to spray ammonia and the infusion pipe and the nozzle can be controlled to be retracted into the guide channel for protection according to the furnace temperature, flue gas indicators, etc. In this way, when ammonia spraying is not needed, the personnel can control the nozzle to be retracted into the guide channel, which can avoid the nozzle from being deformed in the boiler body for a long time under high temperature environment, thereby ensuring the normal spraying of ammonia water. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the external structure of the utility model in the front view direction;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model in the front view direction;

[0018] Figure 3 For this utility model Figure 2 A schematic diagram of the structure enlarged in the middle;

[0019] Figure 4This is a schematic cross-sectional view of the connection between the infusion tube and the nozzle in the present invention;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the bearing ring and the connecting rod in the utility model.

[0021] In the figure: 100, boiler body; 200, mounting plate; 210, liquid separation box; 300, first electrically controlled telescopic rod; 301, bearing collar; 302, connecting rod; 303, slider; 304, universal ball joint; 310, liquid infusion tube; 311, liquid inlet hose; 320, rotating motor; 330, guide channel; 331, sealing plate; 340, nozzle; 341, second electrically controlled telescopic rod; 342, ball joint socket. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0023] Refer to the attached Figure 1-5 The utility model provides an SNCR spray gun for a boiler, including a boiler body 100. A mounting plate 200 is installed on the outer wall of the boiler body 100. The mounting plate 200 is fixed to the outer wall side end of the boiler body 100 through a bracket. The mounting plate 200 is provided to play a supporting role. The inner wall side ends of the boiler body 100 are fixedly connected with a guide channel 330. The guide channel 330 is provided to accommodate the liquid infusion pipe 310 so that the liquid infusion pipe 310 can be retracted and protected when not in use. At the same time, the guide channel 330 can adopt an insulating pipe. The inner wall of the guide channel 330 is provided with a spray gun component for spraying ammonia water. The outer wall of the mounting plate 200 away from the boiler body 100 is fixedly installed with a liquid separation box 210, and the liquid separation box 210 is provided. In order to transport the ammonia solution and compressed air to be sprayed and transport them to the liquid delivery pipe 310 through the liquid inlet hose 311, the liquid distribution box 210 needs to be connected to the input pipes for the ammonia solution and the compressed air. The ammonia solution can be prepared by the equipment by mixing ammonia gas and water. The spray gun components include a liquid delivery pipe 310. Multiple liquid delivery pipes 310 are all arranged in corresponding guide channels 330. The mounting plate 200 is close to the outer wall of one side of the boiler body 100 and is rotatably connected to the position corresponding to the liquid delivery pipe 310. The output shaft of the first electrically controlled telescopic rod 300 is fixedly connected to the end of the liquid delivery pipe 310. The first electrically controlled telescopic rod 300 can control the liquid delivery pipe 310 to extend and retract in the guide channel 330, so that the liquid delivery pipe 310 can be extended and retracted.

[0024] The outer wall of the infusion tube 310 on one side close to the first electrically controlled telescopic rod 300 is provided with a liquid inlet, and the inner wall of the liquid inlet is fixedly connected to a liquid inlet hose 311, and the liquid inlet hose 311 leaves a margin for the rotation of the infusion tube 310, and the end of the liquid inlet hose 311 away from the liquid inlet is connected to the liquid outlet of the liquid separation box 210, and the end of the infusion tube 310 inserted into the guide channel 330 is provided with a nozzle 340, and the nozzle 340 is provided to spray ammonia water. A universal ball joint 304 is fixed to the inner wall of the end of the infusion tube 310 close to the nozzle 340, and a liquid penetration hole is formed through the outer wall of the universal ball joint 304, and the inner wall of the nozzle 340 and the end close to the universal ball joint 304 are connected to a ball joint socket 342, and the end of the ball joint socket 342 away from the nozzle 340 extends into the infusion tube 310 The inner wall of the nozzle 310 is rotatably connected to the outer wall of the universal ball joint 304. Specifically, the nozzle 340 can be rotated on the outer wall of the universal ball joint 304 through the ball joint seat 342, so that the angle of the nozzle 340 can be adjusted, thereby adjusting the spray angle of the nozzle 340 on the boiler body 100. The upper and lower sides of the outer wall of the liquid delivery tube 310 and one end close to the nozzle 340 are hinged with one end of the second electrically controlled telescopic rod 341. The output ends of the second electrically controlled telescopic rod 341 are hinged to the corresponding positions of the upper and lower sides of the outer wall of the nozzle 340 close to the liquid delivery tube 310. The nozzle 340 can push the angle of the nozzle 340 to be adjusted up and down when it is extended and retracted. The spray angle of the nozzle 340 can be adjusted by cooperating with the rotating liquid delivery tube 310.

[0025] A rotating motor 320 is fixedly installed on the outer wall of the mounting plate 200 away from the first electrically controlled telescopic rod 300 and at a position corresponding to the first electrically controlled telescopic rod 300. The output shaft of the rotating motor 320 passes through the side wall of the mounting plate 200 and is fixed to the outer wall of the first electrically controlled telescopic rod 300 away from the guide channel 330. The end of the guide channel 330 inserted into the first electrically controlled telescopic rod 300 is hinged with a sealing plate 331. The hinged sealing plate 331 is provided to seal the open end of the guide channel 330 when the infusion tube 310 is retracted into the guide channel 330. The hinged end of 31 can be provided with a torsion spring so that it can rotate downward to seal the guide channel 330 in the absence of external force. The side ends of the outer wall of the infusion tube 310 are rotatably connected to the bearing ring 301. The top end of the outer wall of the bearing ring 301 is fixed with a connecting rod 302 through a fixing plate. The top end of the outer wall of the connecting rod 302 is fixed with a slider 303. The top end of the slider 303 is slidably connected to the bottom end of the inner wall of the guide channel 330. The slider 303 can flip the sealing plate 331 upward to lift it up when the nozzle 340 is extended, so that the nozzle 340 can be extended from the open end of the guide channel 330.

[0026] The use process of the present invention is as follows: first, the prepared ammonia solution can be mixed with compressed air and transported to the liquid separation box 210 through the input pipe for temporary storage. When the boiler body 100 generates exhaust gas during use, the operator can control the spray gun component to operate through the control panel;

[0027] Specifically, the first electrically-controlled telescopic rod 300 controls its output end to extend after being energized, so that the liquid delivery tube 310 can slide along the inner wall of the guide channel 330 toward the inner side of the boiler body 100, and the connecting rod 302 can push the sealing plate 331 upward to flip it, so that the nozzle 340 can extend from the open end of the guide channel 330 to the inner wall of the boiler body 100, and the second electrically-controlled telescopic rod 341 can control its extension and contraction after being energized, thereby adjusting the spray angle of the nozzle 340, and the rotating motor 320 can rotate the liquid delivery tube 310 through the output shaft, so that the angle of the nozzle 340 can be rotated and adjusted, and the liquid separation box 210 will pass the ammonia-water mixture through the liquid inlet hose 311. The liquid is delivered to the liquid delivery pipe 310, and the liquid delivery pipe 310 delivers the ammonia-water mixture to the nozzle 340 through the liquid penetration hole provided in the universal ball joint 304, and the nozzle 340 then sprays the ammonia-water mixture to react with the harmful gases inside the boiler body 100. When the ammonia-water mixture does not need to be sprayed, the angle of the nozzle 340 is corrected by the second electrically-controlled telescopic rod 341, and then the first electrically-controlled telescopic rod 300 is contracted so that the liquid delivery pipe 310 and the nozzle 340 can be retracted into the guide channel 330 for temporary storage, and the sealing plate 331 is rotated downward by the reset torsion spring to reset, thereby closing the guide channel 330. The guide channel 330 is located on the outside of the boiler body 100, and a sealing gasket can be provided to reduce gas leakage.

[0028] The above description is merely a preferred embodiment of the present invention. Anyone skilled in the art may utilize the above-described technical solutions to modify the present invention or create equivalent technical solutions. Therefore, any simple modification or equivalent replacement based on the technical solutions of the present invention falls within the scope of protection claimed by the present invention.

Claims

1. A SNCR spray gun for a boiler, comprising a boiler body (100), wherein an outer wall of the boiler body (100) is mounted with a mounting plate (200), the mounting plate (200) being fixed to the outer wall side end of the boiler body (100) via a bracket, and the inner wall side ends of the boiler body (100) are fixedly connected with a guide channel (330), characterized in that: The inner walls of the guide channels (330) are each provided with a spray gun component for spraying ammonia water.

2. The SNCR spray gun for a boiler according to claim 1, characterized in that: A liquid separation box (210) is fixedly mounted on the outer wall of one side of the mounting plate (200) away from the boiler body (100); the spray gun component includes a liquid delivery tube (310); a plurality of the liquid delivery tubes (310) are arranged in corresponding guide channels (330); a first electrically controlled telescopic rod (300) is rotatably connected to the outer wall of one side of the mounting plate (200) close to the boiler body (100) and at a position corresponding to the liquid delivery tube (310); and an output shaft of the first electrically controlled telescopic rod (300) is fixedly connected to an end of the liquid delivery tube (310).

3. The SNCR spray gun for a boiler according to claim 2, characterized in that: A liquid inlet is provided on the outer wall of the liquid infusion tube (310) on one side close to the first electrically controlled telescopic rod (300), and a liquid inlet hose (311) is fixedly connected to the inner wall of the liquid inlet. The end of the liquid inlet hose (311) away from the liquid inlet is connected to the liquid outlet of the liquid separation box (210).

4. The SNCR spray gun for a boiler according to claim 2, characterized in that: A nozzle (340) is provided at one end of the infusion tube (310) inserted into the guide channel (330), and a universal ball head (304) is fixed to the inner wall of one end of the infusion tube (310) close to the nozzle (340), and a liquid penetration hole is formed through the outer wall of the universal ball head (304).

5. The SNCR spray gun for a boiler according to claim 4, characterized in that: The inner wall of the nozzle (340) and one end close to the universal ball joint (304) is connected to a ball joint socket (342), and the end of the ball joint socket (342) away from the nozzle (340) extends into the inner wall of the infusion tube (310) and is rotatably connected to the outer wall of the universal ball joint (304).

6. The SNCR spray gun for a boiler according to claim 5, characterized in that: One end of a second electrically controlled telescopic rod (341) is hingedly connected to the upper and lower sides of the outer wall of the infusion tube (310) and one end close to the nozzle (340), and the output end of the second electrically controlled telescopic rod (341) is hingedly connected to corresponding positions on the upper and lower sides of the outer wall of the nozzle (340) close to the infusion tube (310).

7. The SNCR spray gun for a boiler according to claim 3, characterized in that: A rotating motor (320) is fixedly mounted on the outer wall of one side of the mounting plate (200) away from the first electrically controlled telescopic rod (300) and at a position corresponding to the first electrically controlled telescopic rod (300), and the output shaft of the rotating motor (320) passes through the side wall of the mounting plate (200) and is fixed to the outer wall of one side of the first electrically controlled telescopic rod (300) away from the guide channel (330).

8. The SNCR spray gun for a boiler according to claim 6, characterized in that: One end of the guide channel (330) inserted into the first electrically controlled telescopic rod (300) is hingedly connected to a sealing plate (331); the side ends of the outer walls of the infusion tube (310) are rotatably connected to bearing rings (301); the top ends of the outer walls of the bearing rings (301) are fixed with connecting rods (302) via fixing plates; the top ends of the outer walls of the connecting rods (302) are fixed with sliders (303); the top ends of the sliders (303) are slidably connected to the bottom ends of the inner walls of the guide channel (330).

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