Anti-blocking device for emergency discharge pipe and kiln

Abstract

The utility model discloses an anti-blocking device for an emergency discharge pipe and a kiln, and belongs to the technical field of calcining equipment. The anti-blocking device comprises a cavity, a side wall, a bottom plate and a top cover, wherein the bottom plate and the top cover are matched and hermetically connected with the upper end face and the lower end face of the side wall; a pipeline connector is formed in the side wall; the push rod assembly comprises a pull rod and a baffle, the pull rod penetrates through the top cover, the baffle is connected with the end of the pull rod and moves in the cavity, and during working, the baffle covers the through hole of the bottom plate and is used for blocking the through hole of the bottom plate; and the driving piece is connected with the pull rod and located at the end outside the cavity and controls the pull rod to reciprocate in the cavity. The kiln comprises a kiln body, an emergency discharge pipe and the anti-blocking device, the bottom plate of the cavity is connected with the kiln body, and the pipeline connecting hole in the side wall of the cavity is connected with the emergency discharge pipe. According to the utility model, organic matters can be effectively prevented from being adhered and accumulated on the inner wall of the emergency discharge pipe and in the discharge valve for a long time to block the emergency discharge pipe, the discharge time of combustible gas in the device when a production line is shut down is shortened, and the safety of the production line is effectively guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of calcination equipment technology, and more specifically, relates to an anti-clogging device for emergency discharge pipes and a kiln. Background Technology

[0002] In thermal furnace systems, when power outages occur or gas or air valves malfunction, residual combustible gases inside the furnace will be discharged through emergency exhaust pipes. However, after prolonged use, volatile matter adheres to the inner wall of the emergency exhaust pipe, forming organic matter. In kiln systems, for example, tar will adhere to the inner wall of the emergency exhaust pipe, accumulating with fly ash and other viscous mixtures around valves and other pipe fittings, easily causing tar blockage. Tar blockage prevents combustible gases from being discharged quickly, creating a safety hazard. Current solutions include increasing external insulation to reduce tar condensation or using scrapers to clear blockages. The disadvantages of increasing external insulation are high cost, long installation and maintenance times, and wasted heat energy. The disadvantage of scraper cleaning is limited cleaning area.

[0003] A search revealed that Chinese patent application publication number CN104388125A, dated March 4, 2015, discloses an anti-clogging device for the gas outlet pipe of a biomass gasifier. The gas outlet at the top of the gas pipe is equipped with a spray device, and the bottom of the gas pipe is a water outlet. A scraper is installed inside the gas outlet pipe, fitted onto a rotating screw, with the outer contour of the scraper closely adhering to the inner wall of the gas outlet pipe. A reset sensor and a current sensor are installed at the end of the gas outlet pipe. When the reset sensor detects that the scraper has reached a set position, the current sensor instructs the motor to reverse, resetting the scraper. When the scraper has rotated a preset number of times, the current sensor instructs the motor to rotate forward, scraping away tar and other mixtures from the gas outlet pipe. However, this patent has a limited cleaning area, only cleaning critical pipe sections, and cannot solve the problem of tar corrosion on pipes and valves.

[0004] Therefore, there is an urgent need to develop an anti-clogging device and kiln for emergency discharge pipes to protect emergency pipelines and further apply it to kilns to prevent the safety hazard of tar blockage in emergency discharge pipes. Summary of the Invention

[0005] 1. The problem to be solved

[0006] This utility model provides an anti-clogging device for emergency discharge pipes, which aims to solve the problem of easy clogging of existing emergency discharge pipes during long-term use, causing safety hazards.

[0007] This utility model further provides a kiln in which the above-mentioned anti-blocking device is installed to protect the emergency discharge pipe of the kiln.

[0008] 2. Technical Solution

[0009] To solve the above problems, the present invention adopts the following technical solution.

[0010] An anti-clogging device for an emergency discharge pipe, comprising:

[0011] The chamber consists of side walls and a bottom plate and a top cover that are sealed and connected to the upper and lower end faces of the side walls; pipe connection ports are provided in the side walls.

[0012] The push rod assembly includes a pull rod and a baffle. The pull rod passes through the top cover, and the baffle is connected to the end of the pull rod and moves within the cavity. During operation, the baffle covers the through hole of the bottom plate to seal the through hole of the bottom plate.

[0013] The driving component, connecting the pull rod, is located at the end outside the cavity and controls the pull rod to reciprocate within the cavity.

[0014] With the above technical solution, the chamber of the present invention does not need to be insulated, so that the volatile gases that are released can be cooled and condensed into organic matter in the chamber and fall onto the bottom plate, thereby achieving a seal between the bottom plate of the chamber and the baffle.

[0015] As one possible embodiment of the present invention, the push rod assembly further includes a plug connected to the lower end face of the baffle, the plug being able to pass through the through hole of the base plate.

[0016] In the case of the above technical solution, in order to ensure that the emergency discharge pipe can be used at any time, a protruding plug is installed at the bottom of the chamber. Taking the application in a kiln as an example, when in use, the plug extends into the kiln body so that the tar condensed in the kiln pipe cannot submerge the inlet of the chamber.

[0017] As one possible embodiment of this utility model, a sealing element is provided at the junction of the pull rod and the top cover, which can be any commercially available sealing structure that can achieve the junction of the pull rod and the top cover.

[0018] As one possible embodiment of this utility model, in order to increase the sealing effect of the sealing element, a sealing element combining an air seal and a packing seal is provided, that is, the sealing element includes:

[0019] The packing chamber, with its lower end fixed to the top cover, is a hollow structure and is fitted onto the tie rod. The inner wall of the packing chamber and the outer surface of the tie rod form an annular packing cavity, which is filled with sealing packing.

[0020] A gland is fixed to the upper end of the packing chamber. The gland has a boss that is inserted into the packing chamber to compress and seal the packing.

[0021] The nitrogen pipe is located on the side of the packing chamber and is connected to the packing chamber. In operation, the nitrogen pipe introduces nitrogen into the packing chamber to fill and seal the gaps in the packing.

[0022] In one possible embodiment of this utility model, the packing chamber is provided with a first sealing packing, a sealing ring, and a second sealing packing sequentially along the length of the tie rod. The sealing ring is used to support the first sealing packing and the second sealing packing. The opening of the nitrogen pipe faces the outer ring surface of the sealing ring. A groove is formed on the circumferential direction of the outer ring surface of the sealing ring, and at least one through hole is formed on the radial direction of the groove.

[0023] As one possible embodiment of this utility model, an emergency valve is installed on the pipe connection hole on the side wall of the chamber.

[0024] In one possible embodiment of this utility model, the emergency valve is a pneumatic valve.

[0025] In one possible embodiment of this utility model, a hollow shell-shaped guide is fixedly connected to the outer surface of the top cover outside the cavity, and the driving component is installed outside the guide. The guide can be bolted to the top cover.

[0026] In one possible embodiment of this utility model, the driving component is a cylinder.

[0027] In one possible embodiment of this utility model, the bottom plate and the top cover are connected to both ends of the side wall of the chamber by flanges, which makes it easy to open the bottom plate and the top cover to clean and maintain the anti-blocking device during maintenance.

[0028] A kiln includes a kiln body and an emergency discharge pipe, with the aforementioned anti-clogging device installed between the kiln body and the emergency discharge pipe for separation. The bottom plate of the chamber is connected to the kiln body, and the pipe connection hole on the side wall of the chamber is connected to the emergency discharge pipe. During normal operation of the kiln, under the thrust of the driving component, the baffle is pressed against the bottom plate, preventing tar from spreading into the interior of the chamber.

[0029] In one possible embodiment of this utility model, the bottom plate is welded to the furnace body.

[0030] 3. Beneficial effects

[0031] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0032] This invention's anti-clogging device prevents the emergency discharge pipe from being exposed to a volatile atmosphere for extended periods, thus avoiding the accumulation of sticky substances on the pipe and inlet valve. This reduces the time flammable gases are released during production line shutdowns, effectively ensuring line safety. In kiln systems, it can be installed between the kiln body and the emergency discharge pipe, fundamentally preventing the condensation of volatiles into tar in the emergency discharge pipe during daily production. Attached Figure Description

[0033] Figure 1This is a schematic cross-sectional view of the cavity in the anti-clogging device of this utility model;

[0034] Figure 2 This is a cross-sectional structural diagram of the anti-clogging device of this utility model;

[0035] Figure 3 This is a cross-sectional structural diagram of the sealing element in the anti-clogging device of this utility model;

[0036] Figure 4 This is a schematic diagram of the radial cross-sectional structure of the sealing ring in the anti-clogging device of this utility model;

[0037] Figure 5 This is a top view of the sealing ring in the anti-clogging device of this utility model;

[0038] In the picture:

[0039] 1. Chamber; 11. Base plate; 12. Top cover; 2. Push rod assembly; 21. Pull rod; 22. Baffle; 23. Plug; 3. Drive component; 4. Seal; 41. Packing chamber; 411. First sealing packing; 412. Second sealing packing; 413. Sealing ring; 42. Gland; 421. Boss; 43. Nitrogen pipe; 5. Emergency valve; 6. Guide component. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model patent clearer, the technical solutions of the embodiments of this utility model patent will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model patent, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model patent.

[0041] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0042] Example 1

[0043] This embodiment provides an anti-clogging device for an emergency discharge pipe, comprising a chamber 1, a push rod assembly 2, and a drive component 3. When the emergency discharge pipe does not need to be opened, the drive component 3 acts on the push rod assembly 2, causing the initial position of the push rod assembly 2 to abut against the bottom plate 11 of the chamber 1, thereby sealing the chamber 1 to prevent a large amount of volatile gas from entering. When an emergency occurs and the emergency discharge pipe needs to be opened, the drive component 3 causes the push rod assembly 2 to move upward within the chamber 1, thereby opening the lower passage of the chamber 1, allowing the volatile gas to enter the chamber 1 and then into the emergency discharge pipe that connects to the side wall of the chamber 1.

[0044] Specific combination Figure 1 and Figure 2 As shown:

[0045] The chamber 1 is a cylindrical or other shaped shell. In this embodiment, a cylindrical chamber 1 is selected to avoid cleaning dead corners and facilitate cleaning. The chamber 1 consists of a side wall and a bottom plate 11 and a top cover 12 that are sealed and connected to the upper and lower end faces of the side wall. The side wall of the chamber 1 has a pipe connection port for connecting and installing an emergency discharge pipe.

[0046] The push rod assembly 2 includes a pull rod 21 and a baffle 22. The pull rod 21 passes through the top cover 12. The baffle 22 is connected to the end of the pull rod 21 and moves in the chamber 1. When working, the baffle 22 abuts against the through hole of the bottom plate 11 to seal the through hole of the bottom plate 11.

[0047] The drive component 3 connects to the end of the connecting rod 21 located outside the chamber 1, controlling the connecting rod 21 to perform a stretching motion inside the chamber 1. In this embodiment, the drive component 3 is a double-acting cylinder with a self-locking function, and the initial position is the cylinder's extension rod extending into a self-locking state.

[0048] Based on the above, in order to prevent the through holes on the bottom plate 11 of the chamber 1 from being blocked by condensed organic matter, the push rod assembly 2 also includes a plug 23 connected to the lower end face of the baffle 22. During normal production, the plug 23 extends into the volatile environment inside the furnace through the through holes of the bottom plate 11. When the cylinder is activated, the surface of the plug 23 is self-cleaned by the "shearing effect" generated by the relative movement between the bottom plate 11 and the baffle 22.

[0049] To prevent the volatiles from being directly released into the atmosphere when the anti-clogging device is activated, a seal 4 is inserted through the pull rod 21. This seal 4 can be any commercially available structure that can achieve a seal at the connection between the pull rod 21 and the top cover 12, and it is fixed to the top cover 12 to prevent air leakage from the chamber 1. This embodiment provides a seal 4 that is a combination of an airtight seal and a packing seal, such as... Figure 3 As shown, it includes a packing chamber 41, a gland 42, and a nitrogen pipe 43:

[0050] The packing chamber 41 is welded to the top cover 12 at the lower end. It is a hollow structure and is fitted onto the tie rod 21. The inner wall of the packing chamber 41 and the outer surface of the tie rod 21 form an annular packing cavity, which is filled with sealing packing.

[0051] The gland 42 is fixed to the upper end of the packing chamber 41. The gland 42 is provided with a boss 421. The boss 421 is inserted into the packing chamber to squeeze the sealing packing, so that it is squeezed in the axial direction and expanded in the radial direction to enhance the sealing effect.

[0052] Nitrogen pipe 43 is located on the side of packing chamber 41 and is connected to the packing chamber. In operation, nitrogen pipe 43 introduces nitrogen into the packing chamber to fill the gaps in the sealing packing and achieve a nitrogen + sealing packing combination seal.

[0053] To reduce wear on the sealing packing and improve the lifespan of the seal 4, a first sealing packing 411, a sealing ring 413, and a second sealing packing 412 are sequentially installed in the packing cavity of the packing chamber 41 along the length of the tie rod 21. The sealing ring 413 provides support between the first sealing packing 411 and the second sealing packing 412, and its function is to improve the uneven distribution of pressure along the axial direction of the sealing packing. The inlet of the nitrogen pipe 43 faces the outer ring surface of the sealing ring 413. Figure 4 and 5 As shown, a groove is formed on the circumferential surface of the outer ring 413, and at least one through hole is formed in the radial direction of the groove. In this embodiment, four through holes are evenly formed. During operation, nitrogen fills the groove on the outer ring surface of the sealing ring 413, and then flows into the gap of the sealing packing through the through hole in the radial direction of the groove, realizing a nitrogen + sealing packing combined seal. That is, the pre-tightening and self-tightening effect of the medium pressure generates a compressive force between the sealing packing and the sealing ring 413, thereby allowing the packing and nitrogen to fully fill the gap between the tie rod 21 and the packing chamber 41, thus preventing gas from escaping from the rotating shaft. Other reciprocating shaft seal products can be used as substitutes, including but not limited to single stuffing box seal devices, dry gas seal devices, etc.

[0054] In this embodiment, the anti-blocking device does not require the installation of an emergency valve after connecting the emergency discharge pipe. However, those skilled in the art will know that installing an emergency valve 5 on the pipe connection hole on the side wall of chamber 1 can further enhance the protection of the emergency discharge pipe. In this embodiment, the emergency valve 5 is a pneumatic valve.

[0055] To limit the movement trajectory of the cylinder control lever 21, a hollow shell-shaped guide 6 is fixedly connected to the surface of the top cover 12 outside the chamber 1 by bolts. The cylinder is fixedly installed outside the guide 6, and the extension rod of the cylinder extends into the guide 6 and is fixedly connected to the lever 21. The guide 6 can be fixed to the top cover 12 by bolts.

[0056] To facilitate cleaning and maintenance of the anti-clogging device, in this embodiment, both the base plate 11 and the top cover 12 are connected to the two ends of the side wall of the chamber 1 via flanges.

[0057] In the daily production operation of the system, in the anti-blocking device of this embodiment, the baffle 22 is attached to the bottom plate 11 to produce the first barrier effect. The volatiles in the furnace cannot pass through this device in large quantities, and only a small amount spills into the chamber 1. This can prevent a large amount of organic matter from entering the chamber 1. The outer wall of the chamber 1 is not equipped with heat preservation measures, which ensures the working temperature of the cylinder and improves the reliability of the drive component 3. At the same time, the volatiles that spill into the chamber 1 will condense inside the chamber to form organic matter. That is, a small amount of organic matter condensed inside the chamber 1 will form a liquid seal at the baffle 22, producing the second barrier effect and blocking the volatiles in the furnace from entering the chamber 1.

[0058] In the event of a power outage or equipment malfunction, the feeding is immediately stopped, the main power supply to the system and the corresponding main feed valve are shut off, and the cylinder is activated to retract the cylinder extension rod, thereby pulling the pull rod 21 upward, causing the baffle 22 to open the air inlet of the chamber 1 located on the bottom plate 11. At the same time, the emergency valve 5 is opened to connect the system with the emergency discharge pipe, allowing any remaining flammable or hazardous gases in the system to be discharged through the emergency discharge pipe.

[0059] Example 2

[0060] A kiln according to this embodiment includes a kiln body and an emergency discharge pipe. The kiln body and the emergency discharge pipe are separated by an anti-blocking device as shown in Embodiment 1. The bottom plate 11 of the chamber 1 is connected to the kiln body, and the pipe connection hole on the side wall of the chamber 1 is connected to the emergency discharge pipe. During normal operation of the kiln system, under the thrust of the driving component 3, the baffle 22 adheres to the bottom plate 11, preventing the spread of organic matter—tar—generated in the kiln into the interior of the chamber 1.

[0061] In the daily production operation of the kiln, the baffle 22 in the anti-blocking device is attached to the bottom plate 11, which creates the first barrier effect. The volatiles of the kiln cannot pass through this device in large quantities, and only a small amount spills into the chamber 1. This can prevent a large amount of tar from entering the chamber 1. There are no heat preservation measures attached to the outer wall of the chamber 1, which ensures the working temperature of the cylinder and improves the reliability of the drive component 3. At the same time, the volatiles that spill into the chamber 1 will condense inside the chamber to form tar. That is, a small amount of tar condensed inside the chamber 1 will form a liquid seal at the baffle 22, which creates the second barrier effect and blocks the volatiles of the kiln from entering the chamber 1.

[0062] When the kiln experiences a power outage or equipment malfunction, the feeding is immediately stopped, the main power supply to the kiln and the corresponding main feed valve are shut off, and the cylinder is activated, causing the cylinder extension rod to retract, thereby pulling the pull rod 21 upward, which opens the air inlet of the chamber 1 located in the bottom plate 11 through the baffle 22. At the same time, the emergency valve 5 is opened to connect the kiln and the emergency discharge pipe, allowing any remaining flammable or hazardous gases in the system to be discharged through the emergency discharge pipe.

[0063] The above description is illustrative of the present invention and its embodiments. This description is not restrictive and is merely one embodiment of the present invention, and is not actually limited thereto. Therefore, if those skilled in the art, inspired by this description, design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A device for preventing blockage in emergency discharge pipes, characterized in that: include: The chamber (1) consists of a side wall and a bottom plate (11) and a top cover (12) that are sealed together with the upper and lower ends of the side wall; the side wall has a pipe connection port; The push rod assembly (2) includes a pull rod (21) and a baffle (22). The pull rod (21) passes through the top cover (12). The baffle (22) connects the end of the pull rod (21) to move in the chamber (1). When working, the baffle (22) covers the through hole of the bottom plate (11) to seal the through hole of the bottom plate (11). The drive unit (3) and the connecting rod (21) are located at the end outside the chamber (1) to control the rod (21) to reciprocate within the chamber (1).

2. The anti-clogging device for an emergency discharge pipe according to claim 1, characterized in that: The push rod assembly (2) also includes a plug (23) connected to the lower end face of the baffle (22), the plug (23) being able to pass through the through hole of the base plate (11).

3. The anti-clogging device for an emergency discharge pipe according to claim 1, characterized in that: A sealing element (4) is installed at the junction of the pull rod (21) and the top cover (12).

4. The anti-clogging device for an emergency discharge pipe according to claim 3, characterized in that: The sealing element (4) comprises: The filling chamber (41) is fixed at the bottom to the top cover (12) and has a hollow structure. It is fitted onto the tie rod (21). The inner wall of the filling chamber (41) and the outer surface of the tie rod (21) form an annular filling cavity, which is filled with sealing packing. The gland (42) is fixed to the upper end of the packing chamber (41). The gland (42) is provided with a boss (421). The boss (421) is inserted into the packing chamber to squeeze and seal the packing. The nitrogen pipe (43) is located on the side of the packing chamber (41). The nitrogen pipe (43) is connected to the packing chamber. In the working state, the nitrogen pipe (43) introduces nitrogen into the packing chamber to fill the gaps of the sealing packing.

5. The anti-clogging device for an emergency discharge pipe according to claim 4, characterized in that: The packing chamber (41) is filled with a first sealing packing (411), a sealing ring (413), and a second sealing packing (412) in sequence along the length of the tie rod (21). The sealing ring (413) is used to support the first sealing packing (411) and the second sealing packing (412). The opening of the nitrogen pipe (43) faces the outer ring surface of the sealing ring (413). The outer ring surface of the sealing ring (413) has a groove in the circumferential direction, and at least one through hole is opened in the radial direction of the groove.

6. The anti-clogging device for an emergency discharge pipe according to claim 1, characterized in that: An emergency valve (5) is installed on the pipe connection hole on the side wall of the chamber (1), and the emergency valve (5) is a pneumatic valve.

7. The anti-clogging device for an emergency discharge pipe according to claim 1, characterized in that: The top cover (12) is fixedly connected to a hollow shell-shaped guide (6) on the surface outside the chamber (1), and the drive (3) is installed outside the guide (6).

8. The anti-clogging device for an emergency discharge pipe according to claim 7, characterized in that: The driving component (3) is a cylinder.

9. A device for preventing blockage in an emergency discharge pipe according to any one of claims 1 to 8, characterized in that: The bottom plate (11) and the top cover (12) are both connected to the two ends of the side wall of the chamber (1) by flanges.

10. A kiln, comprising a kiln body and an emergency discharge pipe, characterized in that: The anti-blocking device according to any one of claims 1 to 9 is also installed, the bottom plate (11) of the chamber (1) is connected to the furnace body, and the pipe connection hole on the side wall of the chamber (1) is connected to the emergency discharge pipe.

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