Sealing device for boiler gas soot blowing

Abstract

The invention relates to a sealing device for boiler gas soot blowing, and relates to the technical field of soot blowers, the sealing device comprises a pipeline, a soot blower and a blocking mechanism, and the blocking mechanism comprises a blocking pipe connected with the pipeline and the soot blower; the barrier plate controls the soot blower to be connected or disconnected with the pipeline; the blocking ring is slidably arranged on the blocking pipe and enables gas to pass through the inner side of the blocking ring; the control assembly is used for controlling the blocking pipe to be communicated with or disconnected from the pipeline and positioning the blocking plate; and the pushing assembly is arranged on the blocking ring. When the interior of the furnace body is blocked, flue gas can push a blocking ring and a pushing assembly to move, the pushing assembly moves to drive a control assembly to unlock a blocking plate, the blocking plate can rotate to a vertical state under the action of gravity and abut against a blocking pipe for positioning, and therefore the blocking pipe is blocked; and high-temperature flue gas in the furnace body is prevented from flowing back into the soot blower through the blocking pipe, so that the soot blowing effect on the furnace body is improved, and the risk of pollution to the environment is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of soot blowers, in particular to a sealing device for boiler gas soot blowing. BACKGROUND

[0002] The shock wave (gas pulse) soot blower is a new generation of soot removal technology with advanced performance, and is a replacement product of the boiler soot removal system. The soot blower is widely applied to the removal of soot on the tail heating surface of a boiler, has excellent effect, good economic performance, reliable operation and simple operation and maintenance, and has good popularization and application value.

[0003] In the prior art, the utility model with the publication number CN220669479U comprises a shock wave tank body and a furnace wall, a pipeline is connected to the launching port at the bottom of the shock wave tank body, the pipeline passes through the furnace wall and is connected to an incinerator, a sleeve is installed outside the pipeline in front of the furnace wall, a gap is formed in the bottom of the sleeve, a gap is also formed in the top of the sleeve on the two sides of the gap, a wind source branch pipe is connected to the outer wall surface of the sleeve, the other end of the wind source branch pipe is connected to a wind source main pipe, a sealing fan outlet pipeline is connected to the wind source main pipe, a manual butterfly valve is installed at the front end of the sealing fan outlet pipeline, the manual butterfly valve is opened, and the gas in the sealing fan outlet pipeline is sent into the pipeline through the gap, so that the flue gas in the furnace is prevented from flowing back to the shock wave soot blowing tank and the pipeline.

[0004] During operation, the dust in the furnace body is blown out to achieve cleaning. However, if the furnace body is blocked during the cleaning process, the gas and dust in the furnace body mix to form high-temperature flue gas, which is easy to backflow into the soot blower, thereby easily causing damage to the soot blower, or the high-temperature flue gas is dispersed to the external environment, thereby reducing the soot blowing effect on the furnace body and easily causing environmental pollution. SUMMARY

[0005] In order to improve the soot blowing effect on the furnace body and reduce the risk of environmental pollution, the application provides a sealing device for boiler gas soot blowing.

[0006] The sealing device for boiler gas soot blowing provided by the application adopts the following technical scheme: A sealing device for boiler gas soot blowing, comprising a pipeline for connecting with a furnace body, a soot blower arranged on the pipeline, a blocking mechanism arranged on the pipeline and connected with the soot blower and blocking the backflow of flue gas in the furnace body to the soot blower, the blocking mechanism comprising: a blocking pipe connected with the pipeline and the soot blower; a blocking plate rotatably installed on the blocking pipe and controlling the communication or disconnection of the soot blower and the pipeline; A blocking ring is arranged on the blocking pipe and located on the side of the blocking plate close to the furnace body and allows the gas to pass through the inside of the blocking ring into the pipe; A control assembly is arranged for controlling the blocking pipe to be connected or disconnected with the pipe and positioning the blocking plate; A pushing assembly is arranged on the blocking ring; When the furnace body is running, the control assembly controls the blocking pipe to be disconnected with the pipe, when the soot blower is running, the control assembly controls the blocking pipe to be connected with the pipe, the gas input by the soot blower pushes the blocking plate to be turned to the horizontal state, the control assembly positions the blocking plate and allows the soot blower to be connected with the pipe; the high-temperature flue gas pressure in the furnace body increases and enters the pipe, which pushes the blocking ring and the pushing assembly away from the furnace body, the pushing assembly moves and drives the control assembly to unlock the blocking plate, the blocking plate is turned to the vertical state under the action of gravity and is positioned against the blocking pipe to control the soot blower to be disconnected with the pipe.

[0007] By using the above technical scheme, when the furnace body is running, the control assembly controls the blocking pipe to be disconnected with the pipe, so that the hot gas in the furnace body cannot enter the soot blower; when the soot blower is started, the control assembly controls the blocking pipe to be connected with the pipe, the gas pressure in the furnace body and the pipe is low, the soot blower is started, the gas pushes the blocking plate to be turned to the horizontal state through the blocking pipe, and the control assembly positions the position of the blocking plate, so that the gas can stably pass through the blocking ring, the pipe and enter the furnace body to blow the furnace body.

[0008] If the furnace body is blocked, the gas pressure in the furnace body increases, and at the same time, the soot blower continues to input gas into the pipe through the blocking ring, and part of the high-temperature flue gas in the furnace body enters the pipe and moves towards the side wall of the blocking ring, with the increase of the flue gas pressure, the flue gas can push the blocking ring and the pushing assembly to be close to the blocking plate and away from the furnace body, until the pushing assembly drives the control assembly to unlock the blocking plate, the blocking plate can be turned to the vertical state under the action of gravity and positioned against the blocking pipe, thereby blocking the blocking pipe and preventing the high-temperature flue gas in the furnace body from backflowing into the soot blower through the blocking pipe, even if the flue gas pressure in the pipe continues to increase, the flue gas will continue to push the blocking plate to be positioned against the blocking pipe, so that the blocking effect of the blocking pipe is better, the risk of high-temperature flue gas entering the soot blower is further reduced, the blowing effect of the furnace body is improved, and the risk of pollution to the environment is reduced.

[0009] When the pressure in the furnace body decreases, the pushing force of the soot blower on the blocking plate and the blocking ring increases, so that the blocking ring and the control assembly are away from the control assembly, and the blocking plate is turned to the horizontal state, and the control assembly continues to position the position of the blocking plate, and then repeats in turn, so that the risk of damage to the soot blower caused by backflow of high-temperature flue gas is greatly reduced, and the risk of pollution to the environment caused by high-temperature flue gas entering the environment is also reduced.

[0010] Optionally, the blocking tube has a vertical moving slot, and the control component includes: A control valve is installed on the blocking pipe and is used to control the connection or disconnection between the blocking pipe and the pipeline. Iron blocks are set on the barrier plate; The magnetic block is vertically slidably set on the moving trough and positioned on the bottom of the moving trough under the action of gravity. When the baffle plate turns to the horizontal state, the magnetic block and the iron block are attracted and positioned. When the pushing component moves away from the furnace body, it approaches the magnetic block and pushes the magnetic block upward and then separates it from the iron block, so that the baffle plate turns to the vertical state under its own gravity and the gravity of the iron block, and is used to control the soot blower to disconnect from the pipe.

[0011] By adopting the above technical solution, the control valve controls the connection or disconnection of the blocking pipe and the pipeline. In the initial state, the magnetic block is positioned on the bottom of the moving trough under the action of gravity. Gas is used to push the blocking plate to rotate, so that the blocking plate turns to a horizontal state. The magnetic block is attached to the iron block for positioning, so that the soot blower is connected to the pipeline, thereby facilitating soot blowing in the furnace. If a blockage occurs in the furnace, when the high-temperature flue gas pushes the blocking ring and the pushing component closer to the magnetic block, it pushes the magnetic block away from the iron block, so that the magnetic block separates from the iron block and unlocks the blocking plate. The blocking plate turns to a vertical state under the action of gravity and then abuts against the blocking pipe, thereby controlling the disconnection of the blocking pipe and the pipeline.

[0012] If the pressure of the high-temperature flue gas decreases, the pressure of the gas blown in by the sootblower increases. The gas can push the baffle plate to a horizontal position. During the rotation, the gas can pass through the baffle ring. When passing through, it can push the baffle ring and the pushing component away from the magnetic block. Under the action of gravity, the magnetic block drives the pushing component away from the magnetic block, causing the pushing component to separate from the magnetic block. Then, under the action of gravity, the magnetic block is positioned on the bottom of the moving trough. The iron block can be attracted and positioned by the magnetic block. Thus, it can be automatically adjusted according to the air pressure, which further improves the sootblowing effect of the sootblower on the furnace body, and also reduces the risk of high-temperature flue gas entering the environment and polluting the environment.

[0013] The magnetic block and iron block can position the baffle plate, and the baffle plate material can be made of lightweight material, which facilitates the rotation of the baffle plate by gas and achieves the positioning of the baffle plate at the same time. Moreover, the magnetic block is located on the side of the baffle plate close to the inner wall of the baffle tube. Therefore, when the magnetic block attracts the iron block to position the baffle plate, the baffle plate can also prevent gas and other fluids from contacting the magnetic block, which further improves the positioning effect of the magnetic block on the baffle plate.

[0014] Optionally, the pushing component includes: Pushing block one and pushing block two are respectively set on the blocking ring and the magnetic block, and have inclined and closely attached pushing surfaces.

[0015] By adopting the above technical solution, the inclined pushing surface facilitates the separation of the magnetic block from the iron block by the blocking ring. It also facilitates the magnetic block, under the action of gravity, to work with the gas to push the blocking ring away from the magnetic block. This allows the magnetic block to move back to its original position under the action of gravity, and the blocking ring to also move back to its original position. This improves the stability during operation, further enhances the soot blowing effect of the soot blower on the furnace body, and also reduces the risk of high-temperature flue gas entering the environment and polluting it.

[0016] Optionally, the inner wall of the blocking ring is provided with an inclined guide surface that facilitates the passage of gas blown out by the soot blower.

[0017] By adopting the above technical solution, the guide surface facilitates the soot blowing of gas into the furnace body, and also increases the effect of gas pushing the obstruction ring back, further improving the soot blowing effect of the soot blower on the furnace body, while also reducing the risk of high-temperature flue gas entering the environment and polluting the environment.

[0018] Optionally, a positioning ring is provided inside the blocking tube and on the side of the blocking plate away from the furnace body. After the blocking plate is rotated to a vertical position, it abuts against the positioning ring for positioning. The inner diameter of the positioning ring is larger than the inner diameter of the blocking ring.

[0019] By adopting the above technical solution, the baffle plate is positioned against the positioning ring, which makes the baffle plate better at blocking and sealing; and the inner diameter of the positioning ring is larger than the inner diameter of the baffle ring, thereby reducing the blocking effect of the positioning ring on the gas and ensuring the pushing effect of the gas on the baffle ring.

[0020] Optionally, the soot blower includes: The shock tank has a delivery pipe installed at the emission port; The input pipe is detachably connected to the delivery pipe and the blocking pipe at both ends, and has multiple gaps spaced apart. A sealed fan that connects to multiple gaps via a connecting assembly and is detachably connected to an inlet pipe.

[0021] By adopting the above technical solution, the setting of the input pipe and the connecting component facilitates the replacement of the input pipe. It is possible to replace the input pipe with different sizes and different numbers of slits according to different needs, and it is also convenient to replace the input pipe after it is damaged, thereby making the soot blower have a better soot blowing effect on the furnace body.

[0022] At the same time, the gas enters the air intake chamber through the gas connection component, and then the gas enters the blocking tube evenly through multiple gaps, so that the amount of gas entering the blocking tube is more and more uniform, thus improving the soot blowing effect.

[0023] Optionally, the two ends of the input pipe, the blocking pipe, and the delivery pipe are all detachably connected by flanges and screws.

[0024] By adopting the above technical solution, it is easy to disassemble and install the input pipe, the blocking pipe, and the delivery pipe.

[0025] Optionally, the connection component includes: Two connecting sleeves are spliced ​​together and positioned on the outer wall of the input pipe, with both ends abutting against two flanges located at both ends of the input pipe. The screw passes through the flange and is threaded onto the connecting sleeve for positioning. The connecting sleeve has an annular air intake chamber that communicates with multiple gaps. Two connecting pipes are installed on two connecting sleeves and are respectively connected to two air intake chambers. The two connecting pipes are flexibly connected to the sealing fan through a clearance component and are used to make way when the connecting sleeves are disassembled.

[0026] By adopting the above technical solution, the connecting sleeves are spliced ​​together and positioned on the outer wall of the input pipe. At this time, the two ends of the two connecting sleeves are positioned against the two flanges. Then, the screws pass through the two flanges located on the input pipe and the delivery pipe and are threadedly connected to the connecting sleeves. This allows the input pipe and the delivery pipe to be connected at the same time, and the two connecting sleeves are fixedly connected to the input pipe, which improves the convenience of the connection process. At the same time, multiple screws cooperate to position the connecting sleeves, which also improves the stability and sealing effect of the connecting sleeves after connection. This further improves the soot blowing effect of the soot blower on the furnace body, and also reduces the risk of high-temperature flue gas entering the environment and polluting the environment.

[0027] At the same time, the gas supply to the connecting sleeve makes the thrust perpendicular to the direction of movement when the screw connects with the connecting sleeve, thereby further improving the stability of the connecting sleeve and improving the soot blowing effect.

[0028] Optionally, the yielding component: The air inlet duct is connected to the sealing fan and is equipped with a three-way pipe joint. Two connecting hoses, one end of which is detachably connected to both ends of a three-way pipe fitting, and the other end of which is detachably connected to two connecting pipes.

[0029] By adopting the above technical solution, the two connecting hoses are connected to the two ends of the three-way pipe joint, and the two hoses are connected to the two connecting pipes. The connecting hoses can make room when the connecting sleeve is connected, and the connecting hoses can also be replaced, which improves the convenience of replacement.

[0030] Optionally, the connecting sleeve is provided with an annular mounting groove, and a sealing ring is snapped onto the mounting groove to press against the input pipe for sealing. The air intake chamber is located inside the sealing ring.

[0031] By adopting the above technical solution, the two sealing rings are respectively snapped into the two mounting slots. After the two connecting sleeves are spliced ​​and fixedly installed on the input pipe, the sealing rings press against the input pipe, thereby preventing gas leakage and further improving the soot blowing effect.

[0032] In summary, this application includes at least one of the following beneficial technical effects: 1. When a blockage occurs inside the furnace, the flue gas can push the baffle ring and the push component to move. The movement of the push component drives the control component to unlock the baffle plate. Under the action of gravity, the baffle plate can turn to a vertical position and abut against the baffle tube for positioning, thereby sealing the baffle tube. This prevents the high-temperature flue gas inside the furnace from flowing back into the soot blower through the baffle tube, improving the soot blowing effect on the furnace and reducing the risk of environmental pollution.

[0033] 2. Gas is used to drive the baffle plate to rotate, so that the baffle plate turns to a horizontal state, and the magnetic block is attracted to the iron block for positioning, so that the soot blower is connected to the pipeline, thereby facilitating soot blowing in the furnace body; if a blockage occurs in the furnace body, the high temperature flue gas pushes the baffle ring to move and unlock the baffle plate, so that the baffle plate turns to a vertical state under the action of gravity and then abuts against the baffle pipe, which is used to control the disconnection of the baffle pipe and the pipeline.

[0034] If the pressure of the high-temperature flue gas decreases, the pressure of the gas blown in by the sootblower increases. The gas can push the baffle plate to a horizontal state, and cause the baffle ring and magnetic block to move back to their original positions. The iron block is then attracted and positioned by the magnetic block, thus automatically adjusting according to the gas pressure. This further improves the sootblowing effect of the sootblower on the furnace body, while also reducing the risk of high-temperature flue gas entering the environment and polluting it. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of the sealing device; Figure 2 This is a partial structural diagram of the sealing device; Figure 3 yes Figure 2 A cross-sectional schematic diagram of AA in the middle; Figure 4 yes Figure 3 Enlarged schematic diagram of section B.

[0036] Reference numerals: 1. Furnace body; 11. Pipe; 2. Blocking mechanism; 21. Blocking pipe; 22. Blocking plate; 23. Blocking ring; 24. Receiving groove; 25. Moving groove; 26. Sliding groove; 27. Positioning ring; 28. Guide surface; 3. Control component; 31. Control valve; 32. Iron block; 33. Magnetic block; 4. Pushing component; 41. Pushing block one; 42. Pushing block two; 43. Pushing surface; 5. Soot blower; 51. Shock tank; 52. Input pipe; 53. Sealing fan; 54. Conveying pipe; 55. Flange; 56. Gap; 6. Connecting component; 61. Connecting sleeve; 62. Connecting pipe; 63. Air inlet chamber; 64. Sealing ring; 7. Clearance component; 71. Air inlet pipe; 72. Connecting hose; 73. Three-way pipe joint. Detailed Implementation

[0037] The following provides a further detailed description of this application.

[0038] This application discloses a sealing device for boiler gas soot blowing.

[0039] Reference Figure 1 The sealing device for boiler gas soot blowing includes a pipe 11 for connecting to the furnace body 1 and a soot blower 5 installed on the pipe 11. The pipe 11 is horizontal and connected to the furnace body 1. A blocking mechanism 2 is installed on the pipe 11 to connect to the soot blower 5 and to prevent high-temperature flue gas in the furnace body 1 from backflowing to the soot blower 5.

[0040] Reference Figures 1-3 The blocking mechanism 2 includes a blocking pipe 21, a blocking plate 22, a blocking ring 23, a control component 3, and a pushing component 4. The control component 3 is used to control the connection or disconnection between the blocking pipe 21 and the pipe 11, and to position the blocking plate 22.

[0041] Reference Figures 1-4 The control component 3 includes a control valve 31, an iron block 32, and a magnetic block 33. The control valve 31 is fixedly installed on the end of the pipe 11 away from the furnace body 1, and the blocking pipe 21 is fixedly connected to the control valve 31 through a flange 55, a screw, and a nut. The inner diameter of the blocking pipe 21 is the same as the inner diameter of the pipe 11 and the two are coaxially arranged. The control valve 31 controls the connection or disconnection between the blocking pipe 21 and the pipe 11. The end of the blocking pipe 21 away from the pipe 11 is fixedly connected to the soot blower 5.

[0042] A receiving groove 24 is provided on the top of the inner wall of the blocking pipe 21. A vertical moving groove 25 is provided at the end of the receiving groove 24 near the control valve 31. A positioning ring 27 is coaxially fixedly installed on the inner wall of the blocking pipe 21 and on the side of the receiving groove 24 away from the control valve 31. The blocking plate 22 is rotatably installed on the receiving groove 24 via a rotating shaft. A fixing groove is provided on the side wall of the blocking plate 22. The iron block 32 is fixedly installed on the fixing groove. The blocking plate 22 is made of lightweight material and is easy for gas to push the blocking plate 22 to rotate. When the blocking plate 22 rotates to a vertical position under its own weight and the weight of the iron block 32, it abuts against the positioning ring 27 for positioning. This controls the soot blower 5 to disconnect from the pipe 11, thereby preventing the high-temperature flue gas in the furnace body 1 from flowing back into the soot blower 5 through the pipe 11 and the blocking pipe 21, reducing the risk of damage to the soot blower 5.

[0043] The magnetic block 33 is vertically slidably installed on the moving trough 25. In the initial state, the magnetic block 33 is positioned on the bottom of the moving trough 25 under its own gravity. When the soot blower 5 is started, the gas enters the blocking pipe 21 and pushes the blocking plate 22 to a horizontal state. The blocking plate 22 is positioned against the receiving trough 24. At the same time, the magnetic block 33 is attached to the iron block 32 for positioning, thereby controlling the connection between the soot blower 5 and the pipe 11.

[0044] A sliding groove 26 is provided on the inner wall of the blocking pipe 21 and on the side of the blocking plate 22 near the furnace body 1. The blocking ring 23 is slidably installed on the sliding groove 26 in the direction of approaching or away from the furnace body 1, and the sliding direction of the blocking ring 23 is parallel to the axis of the blocking pipe 21. The inner diameter of the blocking ring 23 is smaller than the inner diameter of the positioning ring 27 and the two are coaxially arranged. The blocking ring 23 is located on the side of the blocking plate 22 near the furnace body 1, so that the gas passes through the inner side of the blocking ring 23 and enters the pipe 11. An inclined guide surface 28 is coaxially provided on the inner wall of the end of the blocking ring 23 near the blocking plate 22. The guide surface 28 facilitates the gas to pass through the inner side of the blocking ring 23 and facilitates the gas to push the blocking ring 23 to move, so that the blocking ring 23 is positioned against the sliding groove 26 near the furnace body 1.

[0045] The pushing component 4 is disposed on the blocking ring 23. The pushing component 4 includes a first pushing block 41 and a second pushing block 42. The first pushing block 41 is fixedly installed on the side wall of the blocking ring 23 near the blocking plate 22. The second pushing block 42 is fixedly installed on the magnetic block 33 and located on the end of the blocking plate 22 near the blocking ring 23. The first pushing block 41 and the second pushing block 42 have inclined and tightly fitting pushing surfaces 43.

[0046] When the furnace body 1 is running, the control valve 31 controls the blocking pipe 21 to disconnect from the pipeline 11, thereby preventing high-temperature gas in the furnace body 1 from entering the soot blower 5 through the blocking pipe 21 during the operation of the furnace body 1. When the soot blower 5 is running, the control valve 31 controls the blocking pipe 21 to connect with the pipeline 11. The soot blower 5 is started, and gas enters the blocking pipe 21. The gas pushes the blocking plate 22 to rotate upward to a horizontal state. The magnetic block 33 is attracted to the iron block 32 for positioning, so that the soot blower 5 is connected with the pipeline 11, thereby realizing the soot blowing treatment of the furnace body 1.

[0047] If the furnace body 1 becomes blocked, the high-temperature flue gas pressure inside the furnace body 1 increases and enters the pipe 11 and the blocking pipe 21. As the gas generated by the start of the soot blower 5 is blown out through the inside of the blocking ring 23, the high-temperature flue gas in the blocking pipe 21 moves toward the side wall of the blocking ring 23. As the amount of high-temperature flue gas increases, the high-temperature flue gas pushes the blocking ring 23 and the first pushing block 41 closer to the second pushing block 42, so that the pushing surfaces 43 on both the first pushing block 41 and the second pushing block 42 are in close contact. Therefore, the second pushing block 42 and the magnetic block 33 are pushed away from the iron block 32, so that the magnetic block 33 is separated from the iron block 32 and the blocking plate 22 is unlocked.

[0048] Under the weight of itself and the iron block 32, the baffle plate 22 rotates downwards. The rotation of the baffle plate 22 will block the flow of gas input into the sootblower 5, so that the high-temperature flue gas is input through the inner side of the baffle ring 23. The input high-temperature gas will push the baffle plate 22 to continue to rotate downwards, so that the baffle plate 22 rotates to a vertical position and abuts against the positioning ring 27 for positioning, so that the pipe 11 is disconnected from the sootblower 5, thereby reducing the risk of high-temperature flue gas entering the sootblower 5.

[0049] The gas pressure inside the furnace body 1 decreases, while the gas generated by the sootblower 5 continues to push the baffle plate 22 to rotate. The passing gas can push the baffle ring 23 back through the guide surface 28. The magnetic block 33 is positioned on the bottom of the moving groove 25 under the action of gravity, driving the baffle plate 22 to rotate to the horizontal. The magnetic block 33 is attracted to the iron block 32 to position the baffle plate 22, so that the pipe 11 is connected to the sootblower 5. Then the above actions are repeated, which improves the sootblowing effect of the sootblower 5 on the furnace body 1, and also reduces the risk of high temperature flue gas entering the environment and polluting the environment.

[0050] Reference Figures 1-3 The soot blower 5 includes a shock tank 51, an input pipe 52, and a sealing fan 53. The shock tank 51 has the same structure and function as in the prior art, and will not be described in detail here. A horizontal delivery pipe 54 is fixedly installed on the emission port of the shock tank 51. The two ends of the input pipe 52 are detachably connected to the delivery pipe 54 and the blocking pipe 21 through flanges 55 and screws. Multiple slits 56 are arranged in a circular array around the axis of the input pipe 52 on the outer wall of the input pipe 52. The slits 56 are opened along the axis of the input pipe 52.

[0051] The sealing fan 53 is connected to multiple gaps 56 via the connecting assembly 6 and is detachably connected to the input pipe 52. The sealing fan 53 has the same structure as in the prior art. The connecting assembly 6 includes two connecting sleeves 61 and a connecting pipe 62. The two connecting sleeves 61 are spliced ​​together and mounted on the outer wall of the input pipe 52. The two ends of the two connecting sleeves 61 are positioned against the two flanges 55 located on the input pipe 52 on opposite side walls. During the process of connecting the input pipe 52 to the conveying pipe 54 and the blocking pipe 21, the screw passes through the two flanges 55 and is threaded onto the connecting sleeve 61. Thus, the two connecting sleeves 61 are fixedly installed on the input pipe 52 by multiple screws threaded onto the connecting sleeve 61.

[0052] The connecting sleeve 61 has an air inlet chamber 63, and the two air inlet chambers 63 on the two connecting sleeves 61 are connected to all gaps 56; each connecting sleeve 61 has an annular mounting groove, the air inlet chamber 63 is located inside the mounting groove, and a sealing ring 64 is snapped onto the mounting groove to press against the input pipe 52 for positioning and sealing.

[0053] Two connecting pipes 62 are fixedly installed on two connecting sleeves 61 and are respectively connected to two air inlet chambers 63. The two connecting pipes 62 are flexibly connected to the sealing fan 53 through the clearance component 7 and are used to make way when the connecting sleeves 61 are disassembled.

[0054] The clearance assembly 7 includes an air inlet pipe 71 and a connecting hose 72. The air inlet pipe 71 is connected to a sealing fan 53. When the sealing fan 53 is started, air enters the air inlet pipe 71 for delivery. A three-way pipe connector 73 is fixedly installed on the air inlet pipe 71. There are two connecting hoses 72, which are corresponding to two connecting pipes 62. The two ends of the connecting hose 72 are sleeved and fixedly installed on one end of the connecting pipe 62 and the three-way pipe connector 73. The connecting hose 72 is made of soft material and is movable and retractable. The two connecting pipes 62 connect the two connecting pipes 62 to the air inlet pipe 71, so that the gas in the air inlet pipe 71 passes through the two connecting pipes 62 and the two air inlet chambers 63 in sequence, and then enters the blocking pipe 21 through multiple gaps 56.

[0055] The working principle of this application embodiment is as follows: When the furnace body 1 is running, the control valve 31 controls the blocking pipe 21 to disconnect from the pipeline 11. When the soot blower 5 is running, the control valve 31 controls the blocking pipe 21 to connect with the pipeline 11. The soot blower 5 is started, and gas enters the blocking pipe 21. The gas pushes the blocking plate 22 to a horizontal state. The magnetic block 33 is attracted to the iron block 32 for positioning, so that the soot blower 5 is connected to the pipeline 11, thereby realizing the soot blowing treatment of the furnace body 1.

[0056] If the furnace body 1 becomes blocked, the high-temperature flue gas inside the furnace body 1 will push the first pusher block 41 closer to the second pusher block 42, causing the magnetic block 33 to separate from the iron block 32 and unlock the baffle plate 22. After the baffle plate 22 rotates downward to a vertical position, it will abut against the positioning ring 27 for positioning, thereby disconnecting the pipe 11 from the soot blower 5, thus reducing the risk of high-temperature flue gas entering the soot blower 5.

[0057] The gas pressure inside the furnace body 1 decreases, and the gas generated by the soot blower 5 continues to push the baffle plate 22 to rotate to the horizontal position, causing the baffle ring 23 and the magnetic block 33 to move back to their original positions. The magnetic block 33 is attracted to the iron block 32 and positions the baffle plate 22, so that the pipe 11 is connected to the soot blower 5. Then the above actions are repeated, which improves the soot blowing effect of the soot blower 5 on the furnace body 1, and also reduces the risk of high-temperature flue gas entering the environment and polluting the environment.

[0058] 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 sealing device for boiler gas soot blowing, characterized in that: Includes a pipe (11) for connecting to the furnace body (1) and a soot blower (5) installed on the pipe (11). The pipe (11) is provided with a blocking mechanism (2) connected to the soot blower (5) and preventing flue gas in the furnace body (1) from flowing back to the soot blower (5). The blocking mechanism (2) includes: The blocking pipe (21) is connected to the pipe (11) and the soot blower (5); The baffle plate (22) is rotatably mounted on the baffle pipe (21) and controls the connection or disconnection of the soot blower (5) and the pipe (11); The baffle ring (23) is slidably disposed on the baffle tube (21) in the direction of approaching or away from the furnace body (1) and located on the side of the baffle plate (22) close to the furnace body (1) so that the gas passes through the inside of the baffle ring (23) and enters the pipe (11). The control component (3) is used to control the connection or disconnection of the blocking pipe (21) and the pipe (11) and to position the blocking plate (22); The push component (4) is set on the blocking ring (23); When the furnace body (1) is running, the control component (3) controls the blocking pipe (21) to disconnect from the pipe (11). When the soot blower (5) is running, the control component (3) controls the blocking pipe (21) to connect with the pipe (11). The gas input by the soot blower (5) pushes the blocking plate (22) to a horizontal state. The control component (3) positions the blocking plate (22) and connects the soot blower (5) with the pipe (11). When the high-temperature flue gas pressure in the furnace body (1) increases and enters the pipe (11), it pushes the blocking ring (23) and the pushing component (4) away from the furnace body (1). The movement of the pushing component (4) drives the control component (3) to unlock the blocking plate (22). The blocking plate (22) turns to a vertical state under the action of gravity and is positioned against the blocking pipe (21) and controls the soot blower (5) to disconnect from the pipe (11).

2. The sealing device for boiler gas soot blowing according to claim 1, characterized in that: The blocking tube (21) has a vertical moving slot (25), and the control component (3) includes: A control valve (31) is installed on the blocking pipe (21) and is used to control the connection or disconnection between the blocking pipe (21) and the pipeline (11); Iron block (32) is set on baffle plate (22); The magnetic block (33) is vertically slidably set on the moving groove (25) and positioned on the bottom of the moving groove (25) under the action of gravity. When the baffle plate (22) turns to the horizontal state, the magnetic block (33) and the iron block (32) are attracted and positioned. When the pushing component (4) moves away from the furnace body (1), it approaches the magnetic block (33) and pushes the magnetic block (33) to move upward and then separates from the iron block (32), so that the baffle plate (22) turns to the vertical state under the action of its own gravity and the gravity of the iron block (32) and is used to control the soot blower (5) to disconnect from the pipe (11).

3. The sealing device for boiler gas soot blowing according to claim 2, characterized in that: The actuating component (4) includes: Pushing block one (41) and pushing block two (42) are respectively set on the blocking ring (23) and the magnetic block (33) and have inclined and close pushing surfaces (43).

4. The sealing device for boiler gas soot blowing according to claim 1, characterized in that: The inner wall of the blocking ring (23) is provided with an inclined guide surface (28) that facilitates the passage of gas blown out by the soot blower (5).

5. The sealing device for boiler gas soot blowing according to claim 1, characterized in that: A positioning ring (27) is provided inside the blocking tube (21) and on the side of the blocking plate (22) away from the furnace body (1). After the blocking plate (22) is rotated to a vertical position, it abuts against the positioning ring (27) for positioning. The inner diameter of the positioning ring (27) is larger than the inner diameter of the blocking ring (23).

6. The sealing device for boiler gas soot blowing according to claim 1, characterized in that: The soot blower (5) includes: The shock tank (51) has a delivery pipe (54) installed on the emission port. The input pipe (52) is detachably connected to the delivery pipe (54) and the blocking pipe (21) at both ends and is provided with multiple gaps (56) at intervals. The sealing fan (53) is connected to multiple gaps (56) via a connecting assembly (6) and is detachably connected to the inlet pipe (52).

7. A sealing device for boiler gas soot blowing according to claim 6, characterized in that: The input pipe (52) and the blocking pipe (21) and the delivery pipe (54) are all detachably connected by a flange (55) and a screw.

8. A sealing device for boiler gas soot blowing according to claim 7, characterized in that: The connection component (6) includes: Two connecting sleeves (61) are spliced ​​together and positioned on the outer wall of the input pipe (52), with both ends abutting against two flanges (55) located at both ends of the input pipe (52). The screw passes through the flange (55) and is threaded onto the connecting sleeve (61) for positioning. The connecting sleeve (61) has an annular air intake chamber (63) that communicates with multiple gaps (56). Two connecting pipes (62) are provided on two connecting sleeves (61) and are respectively connected to two air inlet chambers (63). The two connecting pipes (62) are softly connected to the sealing fan (53) through the clearance component (7) and are used to make way when the connecting sleeves (61) are disassembled.

9. A sealing device for boiler gas soot blowing according to claim 8, characterized in that: The yielding component (7): An air inlet pipe (71) is connected to a sealing fan (53) and is equipped with a three-way pipe joint (73). Two connecting hoses (72) are detachably connected at one end to both ends of a three-way pipe connector (73) and detachably connected at the other end to two connecting pipes (62).

10. A sealing device for boiler gas soot blowing according to claim 8, characterized in that: The connecting sleeve (61) has an annular mounting groove, and a sealing ring (64) is snapped onto the mounting groove to seal against the input pipe (52). The air intake chamber (63) is located inside the sealing ring (64).

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