Coke oven gas negative pressure pipeline circulating ammonia water spraying device and control method

Abstract

The invention relates to the technical field of spraying structures, in particular to a coke oven gas negative pressure pipeline circulating ammonia water spraying device and a control method.The coke oven gas negative pressure pipeline circulating ammonia water spraying device comprises an auxiliary pipe arranged on a gas pipeline in a communicating mode and a sealing guide sleeve arranged opposite to the auxiliary pipe, and the on-off state between the auxiliary pipe and the sealing guide sleeve is controlled through a control valve; a spray head structure is arranged in the sealing guide sleeve and is communicated with an external ammonia water pipeline through a movable pipe. By means of the spraying device, the defect that gas conveying work needs to be stopped when a traditional spraying device is overhauled is effectively overcome, the spraying head structure is conveniently isolated from the gas pipeline when the gas pipeline conveys gas continuously, and therefore the gas pipeline keeps good sealing performance, external air cannot enter the gas pipeline, and the spraying device is convenient to use. The nozzle structure can be conveniently and directly disassembled in the state, the convenience of overhauling work is improved, and it is guaranteed that production can be continuously and safely carried out.

Description

Technical Field

[0001] This invention relates to the field of spray structure technology, and in particular to a coke oven gas negative pressure pipeline circulating ammonia water spraying device and control method. Background Technology

[0002] In the coking process, the negative pressure conveying pipeline of coke oven gas needs to be sprayed and washed with circulating ammonia water to prevent the condensation of impurities such as tar. Traditional spraying devices are usually directly installed on the pipeline using flange connections or other methods. During installation, maintenance, or replacement, the pipeline transport often needs to be stopped before disassembly can be carried out. This process not only causes production to stop and affects operating efficiency, but also makes it easy for air to be drawn in from the outside due to poor sealing under negative pressure conditions. The mixing of air will increase the oxygen content in the gas, forming an explosive gas and posing a serious safety risk. At the same time, it will also interfere with the stable operation of subsequent chemical processes. Therefore, there is an urgent need for a spraying device that can be safely installed and maintained without stopping production or disrupting the negative pressure state of the pipeline, so as to eliminate the hidden danger of air intake and ensure safe and continuous production. Summary of the Invention

[0003] This invention provides a circulating ammonia water spraying device and control method for coke oven gas negative pressure pipeline, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A circulating ammonia spraying device for negative pressure pipeline of coke oven gas includes a secondary pipe connected to the gas pipeline and a sealing guide sleeve disposed opposite to the secondary pipe. The on / off state of the secondary pipe and the sealing guide sleeve is controlled by a control valve. A nozzle structure is disposed inside the sealing guide sleeve. The nozzle structure is connected to an external ammonia pipeline through a movable pipe. The nozzle structure can move into the gas pipeline and perform ammonia spraying operation when the control valve is opened. The nozzle structure includes a nozzle with its output end along the direction of fluid flow in the gas pipeline and a cone corresponding to the output end of the nozzle.

[0005] Furthermore, a piston body is provided inside the sealing guide sleeve to reduce the internal space of the sealing guide sleeve.

[0006] Furthermore, the piston body includes an outer ring and an inner ring respectively disposed on the inner wall of the sealing guide sleeve and the outer wall of the movable tube. An elastic sheet is disposed between the outer ring and the inner ring. The elastic sheet is used to isolate the space on both sides of the piston body. The outer ring and the inner ring are relatively fixed to each other by a plurality of connecting brackets.

[0007] Furthermore, a slot is provided on the sealing guide sleeve, and a locking rod that cooperates with the slot is provided on the outer wall of the movable tube.

[0008] Furthermore, the cone is connected to the nozzle via an adjusting rod, and the cone is rotatably mounted on the adjusting rod. The distance between the cone and the output end of the nozzle is adjustable, and several helical ridges are provided on the outer wall of the cone.

[0009] Furthermore, both the secondary tube and the sealing guide sleeve are provided with two sets; The control valve includes a long valve body, which is simultaneously connected to two of the secondary pipes and two of the sealing guide sleeves. A valve plate is movably disposed inside the long valve body along the perpendicular line connecting the two secondary pipes, and the valve plate disconnects at most one of the secondary pipes and its corresponding sealing guide sleeve.

[0010] Furthermore, the control valve is provided with two connecting flanges corresponding to the two sealing guide sleeves, and the ends of the connecting flanges are provided with a plurality of retaining edges one, and the ends of the sealing guide sleeves are provided with a plurality of retaining edges two that cooperate with the plurality of retaining edges one. A sealing ring is provided between the connecting flange and the sealing guide sleeve.

[0011] Furthermore, the sealing ring includes a pressing area located between the connecting flange and the sealing guide sleeve, and a side blocking area applied to the inner wall of the connecting flange and the inner wall of the sealing guide sleeve, with retaining edges provided at both ends of the side blocking area; A circular groove is provided on the inner wall of the connecting flange and the inner wall of the sealing guide sleeve to cooperate with the retaining edge. A deformation chamber is provided in the sealing ring, and the interior of the deformation chamber is filled with fluid or soft material.

[0012] Furthermore, the valve plates are configured in two sets, and they are fitted together. The valve plate includes two auxiliary rollers and a rubber belt disposed on the two auxiliary rollers. The rubber belt is used to seal the secondary pipe or the sealing guide sleeve, and a pressure plate is disposed inside the rubber belt. A notch 1 is provided on one side of one of the rubber belts and on both sides of the other rubber belt. A notch 2 is provided on the long valve body. The auxiliary rollers on the two valve plates are supported by a fixing frame, and the fixing frame passes through the notch 1 and the notch 2 and extends beyond the long valve body.

[0013] A control method for a circulating ammonia water spraying device in a negative pressure pipeline for coke oven gas includes the following steps: The auxiliary pipe, control valve, and sealing guide sleeve are assembled onto the gas pipeline in sequence. The control valve isolates and seals one secondary pipe and its sealing guide sleeve, and the nozzle structure inside the sealing guide sleeve is in an idle state. The other secondary pipe and its sealing guide sleeve are interconnected, thereby connecting the sealing guide sleeve to the gas pipeline, and the nozzle structure inside the sealing guide sleeve is in a working state. The working nozzle structure is moved into the gas pipeline, and the movable pipe moves synchronously within the sealed guide sleeve. Gas began to circulate inside the gas pipeline; Ammonia water is sprayed into the gas in the gas pipeline by using a nozzle structure that is in operation inside the gas pipeline. When it is necessary to inspect the nozzle structure in the working state, the control valve stops the isolation and sealing work of the idle nozzle structure and its upper auxiliary pipe and sealing guide sleeve, so that the idle nozzle structure is moved into the gas pipeline and ammonia water spraying begins. At the same time, the original working nozzle structure is moved into the corresponding sealing guide sleeve, and the control valve isolates and seals the sealing guide sleeve. Remove the sealing guide sleeve that needs maintenance from the control valve. After maintenance is completed, reinstall the sealing guide sleeve onto the control valve.

[0014] The technical solution of this invention can achieve the following technical effects: This effectively solves the drawback of traditional spraying devices that require stopping gas delivery during maintenance. It allows the nozzle structure to be isolated from the gas pipeline while the gas pipeline is continuously delivering gas, thus maintaining good sealing of the gas pipeline and preventing external air from entering. This facilitates direct disassembly of the nozzle structure in this state, improving the convenience of maintenance work and ensuring continuous and safe production.

[0015] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a circulating ammonia water spraying device for negative pressure pipelines of coke oven gas; Figure 2 for Figure 1A schematic diagram of the exploded structure; Figure 3 for Figure 2 Schematic diagram of the structure of the central sealing guide sleeve and movable tube; Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of the central sealing guide sleeve; Figure 5 for Figure 4 A schematic diagram of the structure of the central nozzle; Figure 6 for Figure 2 A cross-sectional view of the control valve. Figure 7 for Figure 6 Schematic diagram of the middle connecting flange; Figure 8 for Figure 2 Schematic diagram of the middle sealing ring; Figure 9 for Figure 8 A partial structural diagram of the second central gap; Figure 10 for Figure 6 Schematic diagram of the middle valve plate; Figure 11 for Figure 10 Schematic diagram of the structure of the rubber belt; Figure 12 for Figure 10 Schematic diagram of the intermediate pressure plate; Figure 13 for Figure 6 Schematic diagram of the structure of the middle isolation unit; Attached diagram label: 100, gas pipeline; 200. Deputy Director; 300. Control valve; 301. Long valve body; 302. Connecting flange; 303. First retaining edge; 304. Second retaining edge; 305. Sealing ring; 306. Pressing area; 307. Side retaining area; 308. Retaining edge; 309. Deformation chamber; 310. Valve plate; 311. Auxiliary roller; 312. Rubber belt; 313. Pressure plate; 314. Notch one; 315. Notch two; 316. Fixing frame; 317. Isolation unit; 318. Guide channel; 319. Insert plate; 320. Long plate; 321. Long rod; 322. Sliding sleeve; 323. Compression sleeve; 324. Connecting rod; 325. Elastomer; 400. Sealing guide sleeve; 401. Piston body; 402. Outer ring; 403. Inner ring; 404. Elastic sheet; 405. Connecting bracket; 406. Slot; 407. Locking rod; 500. Nozzle structure; 501. Nozzle pipe; 502. Cone; 503. Adjusting rod; 504. Spiral ridge; 600, Activity tube. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] like Figures 1 to 5 As shown, this application provides a circulating ammonia spraying device for a coke oven gas negative pressure pipeline, including a secondary pipe 200 connected to a gas pipeline 100 and a sealing guide sleeve 400 disposed opposite to the secondary pipe 200. The secondary pipe 200 and the sealing guide sleeve 400 are connected by a control valve 300 to control their on / off state. A nozzle structure 500 is provided inside the sealing guide sleeve 400. The nozzle structure 500 is connected to an external ammonia pipeline through a movable pipe 600. The nozzle structure 500 can move into the gas pipeline 100 and perform ammonia spraying operation when the control valve 300 is opened. The nozzle structure 500 includes a nozzle 501 with its output end along the fluid flow direction inside the gas pipeline 100 and a cone 502 corresponding to the output end of the nozzle 501.

[0021] Specifically, the gas pipeline 100 is used to transport gas under negative pressure. The auxiliary pipe 200 is installed on the outer wall of the gas pipeline 100, and the connection between the auxiliary pipe 200 and the gas pipeline 100 can be achieved by welding, flange connection, etc. Since only the nozzle structure 500 needs to be inserted into the gas pipeline 100, the auxiliary pipe 200 can be set vertically or inclined on the gas pipeline 100, as long as it meets the mobility requirements of the nozzle structure 500. Taking the axis of the auxiliary pipe 200 being perpendicular to the axis of the gas pipeline 100 as an example, the sealing guide sleeve 400 is coaxially set with the auxiliary pipe 200, which facilitates the operation of the sealing guide sleeve. The nozzle structure 500 within the 400 moves between the sealing guide sleeve 400 and the gas pipeline 100. The control valve 300 can control the connection or disconnection between the secondary pipe 200 and the sealing guide sleeve 400. When the secondary pipe 200 is connected to the sealing guide sleeve 400, the nozzle structure 500 can move into or out of the gas pipeline 100. When the secondary pipe 200 is disconnected from the sealing guide sleeve 400, the nozzle structure 500 is located within the sealing guide sleeve 400, and the gas pipeline 100 is disconnected from the sealing guide sleeve 400. The control valve 300 can be a common valve, as long as its internal space is large enough to meet the movement requirements of the nozzle structure 500.

[0022] The movable tube 600 passes through the sealing guide sleeve 400 and can slide relative to it. One end of the movable tube 600 is connected to the nozzle structure 500, and the other end of the movable tube 600 is connected to the external ammonia water pipeline. In this way, ammonia water can be transported to the nozzle structure 500 through the movable tube 600 and sprayed out by the nozzle structure 500. For easy control, a control valve can be installed on the movable tube 600 or the external ammonia water pipeline. Since the nozzle structure 500 needs to move between the gas pipeline 100 and the sealing guide sleeve 400, the nozzle pipe 501 on the nozzle structure 500 can be interlocked and slidably connected with the movable tube 600. At this time, the movable tube 600 can be directly fixed on the sealing guide sleeve 400, or the movable tube 600 can be allowed to slide on the sealing guide sleeve 400, and the movable tube 600 can be used to drive the nozzle structure 500 to move.

[0023] In use, the auxiliary pipe 200, control valve 300, sealing guide sleeve 400, nozzle structure 500, and movable pipe 600 are sequentially assembled and installed onto the gas pipeline 100. The control valve 300 is closed, and the nozzle structure 500 is located within the sealing guide sleeve 400. The gas pipeline 100 cannot be connected to the outside, and gas is transported under negative pressure through the gas pipeline 100. The control valve 300 is then opened, and the nozzle structure 500 is inserted into the gas pipeline 100. Ammonia water is sprayed into the gas pipeline 100 through the movable pipe 600 and the nozzle structure 500. When maintenance of the nozzle structure 500 is required, [the following steps are taken]. The nozzle structure 500 is moved back into the sealing guide sleeve 400 and the control valve 300 is closed. The control valve 300 isolates and seals the secondary pipe 200 and the sealing guide sleeve 400, thereby isolating the gas pipeline 100 from the sealing guide sleeve 400. The sealing guide sleeve 400 is removed, and the gas pipeline 100 cannot communicate with the outside air, thus keeping the gas pipeline 100 in a sealed state. When the maintenance is completed, the sealing guide sleeve 400 is reinstalled on the control valve 300 and the control valve 300 is opened. The nozzle structure 500 is moved back into the gas pipeline 100 and the ammonia water spraying operation can be carried out.

[0024] When ammonia water enters the nozzle structure 500, it can be sprayed outwards onto the cone 502 through the output end of the nozzle 501. The ammonia water impacts the surface of the cone 502 and diffuses in all directions, thus making the ammonia water mist-like and covering the cross-section of the gas pipeline 100, improving the uniformity of ammonia water spraying and the diffusion area. To further improve the spraying effect, the generatrix on the outer wall of the cone 502 can be set into an arc with a gradually changing curvature, thereby reflecting the ammonia water in different directions and improving the diffusion area and spraying effect. In some embodiments, the output end of the nozzle 501 can also be opposite to the gas flow direction, so that the ammonia water will directly impact and mix with the gas after being sprayed out, which can also improve the spraying effect.

[0025] The technical solution of this invention effectively solves the drawback of traditional spraying devices requiring the cessation of gas delivery during maintenance. It allows the nozzle structure 500 to be isolated from the gas pipeline 100 while the gas pipeline 100 is continuously delivering gas, thereby maintaining good sealing of the gas pipeline 100 and preventing external air from entering the gas pipeline 100. This facilitates direct disassembly of the nozzle structure 500 in this state, improving the convenience of maintenance work and ensuring continuous and safe production.

[0026] It should be noted that ammonia water cannot be sprayed into the gas pipeline 100 during the maintenance of the nozzle structure 500. Therefore, the maintenance time of the nozzle structure 500 should not be too long, or the nozzle structure 500 can be replaced directly. This can shorten the ammonia water spraying stagnation time and avoid a large amount of gas from being left untreated.

[0027] Furthermore, a piston body 401 is provided inside the sealing guide sleeve 400 to reduce the internal space of the sealing guide sleeve 400.

[0028] Because the sealing guide sleeve 400 requires a certain amount of space to hold the nozzle structure 500, when the sealing guide sleeve 400 is connected to the gas pipeline 100, the gas in the gas pipeline 100 will enter the sealing guide sleeve 400. When the nozzle structure 500 is under maintenance, the isolation operation of the control valve 300 on the sealing guide sleeve 400 will prevent the gas in the sealing guide sleeve 400 from re-entering the gas pipeline 100. When the sealing guide sleeve 400 is removed from the control valve 300, the gas in the sealing guide sleeve 400 will directly mix with the outside air, resulting in the waste of this part of the gas and pollution of the environment, causing breathing difficulties for workers. By using the piston body 401, when the nozzle structure 500 is moved into the sealing guide sleeve 400, the space inside the sealing guide sleeve 400 can be reduced, thereby reducing the amount of gas residue in the sealing guide sleeve 400 and thus reducing gas waste.

[0029] To achieve the above objectives, the piston body 401 can move within the sealing guide sleeve 400, thereby adjusting the size of the internal space of the sealing guide sleeve 400. Since the nozzle structure 500 and the movable tube 600 need to move, the movable tube 600 is slidably connected to the piston body 401. Furthermore, sealing structures can be installed between the piston body 401 and the sealing guide sleeve 400, and between the piston body 401 and the movable tube 600, to improve the overall sealing performance.

[0030] Furthermore, the piston body 401 includes an outer ring 402 and an inner ring 403 respectively disposed on the inner wall of the sealing guide sleeve 400 and the outer wall of the movable tube 600. An elastic sheet 404 is disposed between the outer ring 402 and the inner ring 403. The elastic sheet 404 is used to isolate the space on both sides of the piston body 401. The outer ring 402 and the inner ring 403 are relatively fixed to each other by a number of connecting brackets 405.

[0031] like Figure 4 As shown, the outer ring 402 and the inner ring 403 are fixedly connected by several connecting brackets 405. When the outer ring 402 is slidably set on the inner wall of the sealing guide sleeve 400, the piston body 401 can slide inside the sealing guide sleeve 400 to adjust the size of the internal space of the sealing guide sleeve 400. When the outer ring 402 is fixedly set on the inner wall of the sealing guide sleeve 400, the position of the piston body 401 inside the sealing guide sleeve 400 is fixed. That is, the piston body 401 can be set in two ways inside the sealing guide sleeve 400. In these two ways, due to the pressure difference between the upper and lower sides of the piston body 401, the elastic plate 404 will be recessed towards the gas pipeline 100. At this time, the space where the nozzle structure 500 is stored on one side of the piston body 401 is reduced, thereby reducing the amount of gas stored in the sealing guide sleeve 400 and thus reducing the amount of gas leakage.

[0032] It should be noted that when the lower space of the piston body 401 is connected to the gas pipeline 100, it will be under negative pressure. The upper space of the piston body 401 can be directly connected to the outside, thus maintaining normal pressure, or it can be directly supplied with air by a gas pump to maintain positive pressure. Both states can create a pressure difference between the upper and lower sides of the piston body 401. Since the sealing guide sleeve 400, when installed on the control valve 300, if the elastic plate 404 is in its natural state, the elastic plate 404 will not shift to one side. The space containing the nozzle structure 500 is recessed, meaning there is still a large space around the nozzle structure 500. A large amount of air will remain in this space. Once the sealing guide sleeve 400 is connected to the gas pipeline 100, the air will directly enter the gas pipeline 100. To reduce the amount of air, positive pressure air can be introduced into the upper side of the piston body 401, so that before the sealing guide sleeve 400 is installed, the piston body 401 is recessed towards the nozzle structure 500. At this time, the space around the nozzle structure 500 is reduced, thereby reducing the amount of air entering the gas pipeline 100.

[0033] Furthermore, a slot 406 is provided on the sealing guide sleeve 400, and a lever 407 that works in conjunction with the slot 406 is provided on the outer wall of the movable tube 600.

[0034] Since the movable tube 600 can slide on the piston body 401, and the gas pipeline 100 is under negative pressure, when the nozzle structure 500 is moved into the gas pipeline 100, the movable tube 600 can be fixed by the interlocking of the locking rod 407 and the locking groove 406, thereby preventing the movable tube 600 from moving freely; Figure 3As shown, the slot 406 can be formed on the top of the sealing guide sleeve 400. The locking rod 407 moves with the movable tube 600 to the position of the slot 406, and then the movable tube 600 is rotated so that the locking rod 407 is locked into the slot 406. If the top of the sealing guide sleeve 400 is in a sealed state, the slot 406 can be an independent unit and fixed to the sealing guide sleeve 400 by bolts, welding or other means. In this case, the slot 406 will not interfere with the sealing work of the top of the sealing guide sleeve 400. This method is mainly suitable for situations where the space above the piston body 401 is in a positive pressure state.

[0035] Furthermore, the cone 502 is connected to the nozzle 501 via an adjusting rod 503, and the cone 502 is rotatably mounted on the adjusting rod 503. The distance between the cone 502 and the output end of the nozzle 501 is adjustable, and several spiral ridges 504 are provided on the outer wall of the cone 502.

[0036] like Figure 5 As shown, when ammonia water is sprayed from the output end of the nozzle 501, the force of the ammonia water on the spiral ridge 504 and the force of the gas flow in the gas pipeline 100 on the spiral ridge 504 will cause the cone 502 to rotate. This facilitates the cone 502 to rotate and diffuse the ammonia water outward, improving its spray uniformity. At the same time, since the distance between the cone 502 and the output end of the nozzle 501 is adjustable, the size of the gap between the output end of the nozzle 501 and the cone 502 can be adjusted, thereby facilitating the adjustment of the diffusion direction and diffusion area of ​​the ammonia water. That is, when the cone 502 is close to the output end of the nozzle 501, the angle of the cone formed by the ammonia water reflected by the cone 502 gradually increases. The adjusting rod 503 passes through the nozzle 501, and the adjusting rod 503 and the nozzle 501 can be fastened together by bolts. Of course, the adjusting rod 503 and the nozzle 501 can also be connected by threads.

[0037] Furthermore, both the secondary pipe 200 and the sealing guide sleeve 400 are provided with two sets; The control valve 300 includes a long valve body 301, which is connected to two auxiliary pipes 200 and two sealing guide sleeves 400. A valve plate 310 is movably disposed inside the long valve body 301 along the vertical line connecting the two auxiliary pipes 200, and the valve plate 310 can disconnect at most one auxiliary pipe 200 from its corresponding sealing guide sleeve 400.

[0038] like Figure 1 and Figure 6As shown, by using two sets of secondary pipes 200 and two sets of sealing guide sleeves 400, when maintenance is required on one set of secondary pipes 200 and sealing guide sleeves 400, the other set of secondary pipes 200 and sealing guide sleeves 400 can remain connected, and the nozzle structure 500 inside can move into the gas pipeline 100 to perform spraying operations. This ensures that ammonia water can be continuously sprayed into the gas pipeline 100, preventing the ammonia water spraying from stopping due to maintenance work; a control valve 300 can connect to the two secondary pipes 200 and their... The upper sealing guide sleeve 400 is used in conjunction with the valve plate 310. When the valve plate 310 moves to the left and isolates the left sub-pipe 200 and the sealing guide sleeve 400, the right sub-pipe 200 is connected to the sealing guide sleeve 400. When the valve plate 310 moves to the right and isolates the right sub-pipe 200 and the sealing guide sleeve 400, the left sub-pipe 200 and the sealing guide sleeve 400 are connected. Of course, when the valve plate 310 is located in the middle of the long valve body 301, the sub-pipes 200 on both sides and the corresponding sealing guide sleeves 400 are in a connected state.

[0039] Furthermore, the control valve 300 is provided with two connecting flanges 302 corresponding to the two sealing guide sleeves 400. The ends of the connecting flanges 302 are provided with several first-type retaining flanges 303, and the ends of the sealing guide sleeves 400 are provided with several second-type retaining flanges 304 that cooperate with the several first-type retaining flanges 303. A sealing ring 305 is provided between the connecting flange 302 and the sealing guide sleeve 400.

[0040] like Figure 3 , Figure 6 and Figure 7 As shown, when assembling the sealing guide sleeve 400 and the control valve 300, the second retaining edge 304 on the sealing guide sleeve 400 can move into the connecting flange 302 through the gap between two adjacent retaining edges 303 on the connecting flange 302. Then, the sealing guide sleeve 400 is rotated so that the second retaining edge 304 is engaged with the lower side of the retaining edge 303, thereby realizing the quick connection between the sealing guide sleeve 400 and the control valve 300. This method is simple and convenient to operate. The sealing ring 305 can seal the gap between the sealing guide sleeve 400 and the connecting flange 302.

[0041] like Figure 7 As shown, a step can be provided on the inner wall of the connecting flange 302, and the first clamping edge 303 is located above the step. The second clamping edge 304 can be clamped between the first clamping edge 303 and the step, so that the sealing guide sleeve 400 and the connecting flange 302 cannot move relative to each other in the axial direction of the sealing guide sleeve 400.

[0042] Furthermore, the sealing ring 305 includes a pressing area 306 located between the connecting flange 302 and the sealing guide sleeve 400, and a side blocking area 307 attached to the inner wall of the connecting flange 302 and the inner wall of the sealing guide sleeve 400. Both ends of the side blocking area 307 are provided with retaining edges 308. A circular groove for use with the retaining edge 308 is provided on the inner wall of the connecting flange 302 and the inner wall of the sealing guide sleeve 400. A deformation chamber 309 is provided in the sealing ring 305, and the deformation chamber 309 is filled with fluid or soft material.

[0043] like Figures 7 to 9 As shown, the pressing area 306 can be located between the sealing guide sleeve 400 and the connecting flange 302, thus directly sealing the gap between the connecting flange 302 and the sealing guide sleeve 400. The upper side of the side baffle area 307 can be located on the inner wall of the sealing guide sleeve 400, and the lower side of the side baffle area 307 can be located on the inner wall of the connecting flange 302. Thus, the side baffle area 307 directly blocks and seals the gap between the sealing guide sleeve 400 and the connecting flange 302. The two retaining edges 308 on the upper and lower sides of the side baffle area 307 can be respectively inserted into the circular grooves on the sealing guide sleeve 400 and the circular grooves on the connecting flange 302, which can further improve the sealing performance between the sealing guide sleeve 400 and the connecting flange 302.

[0044] The fluid inside the deformation chamber 309 can be air, oil, water, etc., and the soft material inside the deformation chamber 309 can be soft rubber, soft plastic, or other materials with certain flow characteristics. When the connecting flange 302 and the sealing guide sleeve 400 are squeezed against each other, they will squeeze the material in the deformation chamber 309 corresponding to the pressing area 306 towards the deformation chamber 309 corresponding to the side baffle area 307. This causes the side baffle area 307 to expand and fit more tightly against the inner wall of the sealing guide sleeve 400 and the inner wall of the connecting flange 302. At the same time, the expansion of the side baffle area 307 can further improve the tightness of the fit between the retaining edge 308 and the circular groove, thereby improving the sealing effect.

[0045] Furthermore, the valve plates 310 are set in two sets, and they fit together. The valve plate 310 includes two auxiliary rollers 311 and a rubber belt 312 disposed on the two auxiliary rollers 311. The rubber belt 312 is used to seal the secondary pipe 200 or the sealing guide sleeve 400. A pressure plate 313 is disposed inside the rubber belt 312.

[0046] A notch 314 is provided on one side of one rubber belt 312 and on both sides of the other rubber belt 312. A notch 315 is provided on the long valve body 301. The auxiliary rollers 311 on the two valve plates 310 are supported by a fixing frame 316, and the fixing frame 316 passes through the notch 314 and the notch 315 and extends beyond the long valve body 301.

[0047] like Figure 6 , Figure 10 , Figure 11 and Figure 12As shown, the rubber belt 312 is parallel to the long valve body 301, and the two rubber belts 312 are distributed vertically. The top of the upper rubber belt 312 contacts the top of the inner wall of the long valve body 301, and the bottom of the lower rubber belt 312 contacts the bottom of the inner wall of the long valve body 301. This allows the two rubber belts 312 to fill the internal space of the long valve body 301. Notches 314 are opened on the upper side of the lower rubber belt 312 and on both the upper and lower sides of the upper rubber belt 312, allowing the fixing frame 316 to pass directly through the two rubber belts 312 while ensuring the bottom surface of the lower rubber belt 312 remains intact. When the fixing frame 316 moves, it will drive the auxiliary rollers 31 inside the two valve plates 310. 1. The friction between the rubber belt 312 and the inner wall of the long valve body 301 causes the rubber belt 312 to be driven on the auxiliary roller 311, so that the rubber belt 312 and the inner wall of the long valve body 301 will not generate relative friction. The bottom surface of the lower auxiliary roller 311 moves to the position of the secondary pipe 200 and seals it, thereby isolating the secondary pipe 200 from the sealing guide sleeve 400. Since the negative pressure in the gas pipeline 100 will generate suction on the rubber belt 312, the rubber belt 312 can better seal the secondary pipe 200, and the pressure plate 313 can keep the rubber belt 312 flat, avoiding wrinkles and gas leakage due to suction.

[0048] Since the rubber belt 312 does not generate relative friction with the inner wall of the long valve body 301 when it moves, the negative pressure in the gas pipeline 100 has little resistance to the lateral movement of the valve plate 310. This makes it easier to control the control valve 300, and this method can reduce the frictional wear of the valve plate 310.

[0049] To prevent the left-side secondary pipe 200 from communicating with the right-side sealing guide sleeve 400, or vice versa, as follows: Figure 6 and Figure 13As shown, an additional isolation unit 317 can be provided on the top of each sealing guide sleeve 400 of the long valve body 301. When the valve plate 310 moves to the left, the right isolation unit 317 closes the long valve body 301, isolating the left and right sides of the long valve body 301 from each other. When the valve plate 310 moves to the right, the left isolation unit 317 closes the long valve body 301. Specifically, the isolation unit 317 includes components that are inclinedly arranged on the long valve body 301 and mutually isolated from the long valve body 301. A connecting guide channel 318 contains a sliding insert 319. When the insert 319 is inserted into the long valve body 301, it seals the long valve body 301. The inclined design of the guide channel 318 facilitates a tighter fit between the insert 319 and the inner wall of the long valve body 301 by utilizing the negative pressure within the connected sealing guide sleeve 400 and the gas pipeline 100. A long plate 320 and a long rod 321 are also provided on the guide channel 318. Two sliding sleeves 322 are slidably mounted on the long rod 321. Each sliding sleeve 322 has a retaining sleeve 323 slidably mounted on it in a direction perpendicular to the long plate 320. The retaining sleeve 323 and the long plate 320 are provided with mutually cooperating retaining teeth. The retaining sleeve 323 and the insert plate 319 are rotatably connected by a connecting rod 324. The two connecting rods 324 are connected by an elastic body 325. The elastic body 325 provides a thrust to the connecting rods 324, so that the retaining sleeve 323 can adhere to the long plate 320. The insert plate 319 is fixed in position when the insert plate 319 is locked in place by the locking teeth. When the position of the insert plate 319 needs to be adjusted, simply lift the retaining sleeve 323 to separate the retaining sleeve 323 from the long plate 320, and then move the retaining sleeve 323 along the length of the long rod 321. This will allow the retaining sleeve 323 to pull the insert plate 319 to move via the connecting rod 324. When the retaining sleeve 323 is released, the elastic force provided by the elastic body 325 to the connecting rod 324 will press the retaining sleeve 323 against the long plate 320 again.

[0050] A control method for a circulating ammonia water spraying device in a negative pressure pipeline for coke oven gas includes the following steps: The auxiliary pipe 200, control valve 300, and sealing guide sleeve 400 are sequentially assembled onto the gas pipeline 100; The control valve 300 isolates and seals one secondary pipe 200 and its sealing guide sleeve 400, and the nozzle structure 500 inside the sealing guide sleeve 400 is in an idle state. The other secondary pipe 200 and its sealing guide sleeve 400 are interconnected, thereby connecting the sealing guide sleeve 400 with the gas pipeline 100, and the nozzle structure 500 inside the sealing guide sleeve 400 is in a working state. The working nozzle structure 500 is moved into the gas pipeline 100, and the movable pipe 600 moves synchronously within the sealing guide sleeve 400. Gas begins to circulate inside gas pipeline 100; Ammonia water is sprayed into the gas in the gas pipeline 100 using the nozzle structure 500 which is in working condition. When it is necessary to inspect the working nozzle structure 500, the control valve 300 stops the isolation and sealing work on the idle nozzle structure 500, its upper auxiliary pipe 200, and the sealing guide sleeve 400, so that the idle nozzle structure 500 is moved into the gas pipeline 100 and ammonia water spraying begins. At the same time, the original working nozzle structure 500 is moved into the corresponding sealing guide sleeve 400, and the control valve 300 isolates and seals the sealing guide sleeve 400. Remove the sealing guide sleeve 400 that needs to be inspected from the control valve 300. After the inspection is completed, reassemble the sealing guide sleeve 400 onto the control valve 300.

[0051] The control method described above in this invention can effectively realize the operation of a circulating ammonia spraying device for negative pressure pipeline of coke oven gas, and the technical effects it can achieve are as described in the above embodiments, and will not be repeated here.

[0052] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined herein, and are to be considered as covering any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Thus, if such modifications and modifications fall within the scope of this application and its equivalents, this application intends to include such modifications and modifications.

Claims

1. A circulating ammonia water spraying device for negative pressure pipelines of coke oven gas, characterized in that, It includes a secondary pipe connected to a gas pipeline and a sealing guide sleeve opposite to the secondary pipe. The secondary pipe and the sealing guide sleeve are connected by a control valve to control their on / off state. A nozzle structure is provided inside the sealing guide sleeve. The nozzle structure is connected to an external ammonia water pipeline through a movable pipe. The nozzle structure can move into the gas pipeline and perform ammonia water spraying when the control valve is opened. The nozzle structure includes a nozzle with its output end along the direction of fluid flow in the gas pipeline and a cone corresponding to the output end of the nozzle.

2. The coke oven gas negative pressure pipeline circulating ammonia water spraying device according to claim 1, characterized in that, The sealing guide sleeve is provided with a piston body for reducing the internal space of the sealing guide sleeve.

3. The coke oven gas negative pressure pipeline circulating ammonia spraying device according to claim 2, characterized in that, The piston body includes an outer ring and an inner ring respectively disposed on the inner wall of the sealing guide sleeve and the outer wall of the movable tube. An elastic sheet is disposed between the outer ring and the inner ring. The elastic sheet is used to isolate the space on both sides of the piston body. The outer ring and the inner ring are relatively fixed to each other by several connecting brackets.

4. The coke oven gas negative pressure pipeline circulating ammonia spraying device according to claim 1, characterized in that, A slot is provided on the sealing guide sleeve, and a locking rod that cooperates with the slot is provided on the outer wall of the movable tube.

5. The coke oven gas negative pressure pipeline circulating ammonia water spraying device according to claim 1, characterized in that, The cone is connected to the nozzle via an adjusting rod, and the cone is rotatably mounted on the adjusting rod. The distance between the cone and the output end of the nozzle is adjustable, and several helical ridges are provided on the outer wall of the cone.

6. The coke oven gas negative pressure pipeline circulating ammonia water spraying device according to claim 1, characterized in that, Both the secondary pipe and the sealing guide sleeve are provided with two sets; The control valve includes a long valve body, which is simultaneously connected to two of the secondary pipes and two of the sealing guide sleeves. A valve plate is movably disposed inside the long valve body along the perpendicular line connecting the two secondary pipes, and the valve plate disconnects at most one of the secondary pipes and its corresponding sealing guide sleeve.

7. The coke oven gas negative pressure pipeline circulating ammonia water spraying device according to claim 6, characterized in that, The control valve is provided with two connecting flanges corresponding to the two sealing guide sleeves. The ends of the connecting flanges are provided with several retaining edges, and the ends of the sealing guide sleeves are provided with several retaining edges that cooperate with the retaining edges. A sealing ring is provided between the connecting flange and the sealing guide sleeve.

8. The coke oven gas negative pressure pipeline circulating ammonia water spraying device according to claim 7, characterized in that, The sealing ring includes a pressing area located between the connecting flange and the sealing guide sleeve, and a side blocking area applied to the inner wall of the connecting flange and the inner wall of the sealing guide sleeve, with retaining edges provided at both ends of the side blocking area; A circular groove is provided on the inner wall of the connecting flange and the inner wall of the sealing guide sleeve to cooperate with the retaining edge. A deformation chamber is provided in the sealing ring, and the interior of the deformation chamber is filled with fluid or soft material.

9. A circulating ammonia water spraying device for negative pressure pipelines of coke oven gas according to claim 6, characterized in that, The valve plates are set in two sets, and they fit together. The valve plate includes two auxiliary rollers and a rubber belt disposed on the two auxiliary rollers. The rubber belt is used to seal the secondary pipe or the sealing guide sleeve, and a pressure plate is disposed inside the rubber belt. A notch 1 is provided on one side of one of the rubber belts and on both sides of the other rubber belt. A notch 2 is provided on the long valve body. The auxiliary rollers on the two valve plates are supported by a fixing frame, and the fixing frame passes through the notch 1 and the notch 2 and extends beyond the long valve body.

10. A control method for a coke oven gas negative pressure pipeline circulating ammonia water spraying device, comprising the coke oven gas negative pressure pipeline circulating ammonia water spraying device as described in any one of claims 1-9, characterized in that, Includes the following steps: The auxiliary pipe, control valve, and sealing guide sleeve are assembled onto the gas pipeline in sequence. The control valve isolates and seals one secondary pipe and its sealing guide sleeve, and the nozzle structure inside the sealing guide sleeve is in an idle state. The other secondary pipe and its sealing guide sleeve are interconnected, thereby connecting the sealing guide sleeve to the gas pipeline, and the nozzle structure inside the sealing guide sleeve is in a working state. The working nozzle structure is moved into the gas pipeline, and the movable tube moves synchronously within the sealed guide sleeve. Gas began to circulate inside the gas pipeline; Ammonia water is sprayed into the gas in the gas pipeline by using a nozzle structure that is in operation inside the gas pipeline. When it is necessary to inspect the nozzle structure in the working state, the control valve stops the isolation and sealing work of the idle nozzle structure and its upper auxiliary pipe and sealing guide sleeve, so that the idle nozzle structure is moved into the gas pipeline and ammonia water spraying begins. At the same time, the original working nozzle structure is moved into the corresponding sealing guide sleeve, and the control valve isolates and seals the sealing guide sleeve. Remove the sealing guide sleeve that needs maintenance from the control valve. After maintenance is completed, reinstall the sealing guide sleeve onto the control valve.

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