Biomass pellet boiler ash discharge conduit

Abstract

The utility model provides a kind of biomass pellet boiler ash discharging pipeline, belong to discharging pipeline technical field, this biomass pellet boiler ash discharging pipeline, including main discharging pipeline, rotary valve, ash cleaning device, support base, sealing connection ring and buffer damper;Support base fixed L type main discharging pipeline, upper end ash inlet lower end ash outlet, pipe wall middle part flange installs valve body, cylindrical valve core is rotated by bearing and is equipped with arc channel, one end gear and manual lever meshing, tube outer wall support fixed vibrator, ash inlet is equipped with sealing ring, ring inner trapezoidal groove is embedded rubber ring, base and pipeline junction are equipped with spring washer buffer damper;The utility model can solve the technical problems that existing technology exists biomass pellet boiler ash discharging pipeline is easy to block up and deposit ash, discharging control is not accurate, system vibration impact is big.

Description

Technical Field

[0001] This utility model belongs to the field of emission pipeline technology, specifically, it relates to an ash and slag emission pipeline for a biomass pellet boiler. Background Technology

[0002] Biomass pellet boilers, as clean energy equipment, are widely used in industrial and civil fields. However, the discharge of ash and slag generated during combustion has always been a technical challenge for users. Traditional ash and slag discharge pipes mostly adopt a straight pipe structure and lack effective flow control devices, resulting in uneven ash and slag discharge and easy accumulation and blockage at pipe bends and valve locations. Existing discharge pipes typically use simple ball valves or gate valves for control. The channel design of these valves is not conducive to the passage of ash and slag containing particulate matter, often leading to valve jamming or channel blockage. At the same time, the vibration generated by the biomass boiler during operation is transmitted to the discharge pipe system, exacerbating the loosening and damage of pipe connections. Existing discharge pipe systems lack effective ash cleaning devices, requiring frequent shutdowns for manual cleaning, which seriously affects the continuous operating efficiency of the boiler. In addition, the high-temperature ash and slag flowing in the pipes causes thermal shock to the pipe materials. Traditional pipes lack effective heat dissipation design, resulting in short pipe service life and high maintenance costs. Existing technologies mainly address these problems by increasing pipe diameter, using high-temperature resistant materials, and regular cleaning. However, these methods only treat the symptoms, not the root cause, and cannot fundamentally solve the problems of blockage and vibration impact. They also increase system costs and maintenance workload. Utility Model Content

[0003] In view of this, the present invention provides a biomass pellet boiler ash discharge pipe, which can solve the technical problems of easy clogging and ash accumulation, inaccurate discharge control, and large system vibration and impact in the existing biomass pellet boiler ash discharge pipe.

[0004] This utility model is implemented as follows: This utility model provides an ash discharge pipe for a biomass pellet boiler, comprising: a main discharge pipe, a rotary valve, an ash cleaning device, a support base, a sealing connecting ring, and a buffer shock absorber; the main discharge pipe is fixedly connected to the support base, and the main discharge pipe has a curved L-shaped structure, with an ash inlet at the upper end and an ash outlet at the lower end; a rotary valve is located in the middle of the main discharge pipe, and the rotary valve includes a valve body, a valve core, and a transmission mechanism. The valve body is fixed to the pipe wall of the main discharge pipe through a flange connection, and the valve core has a cylindrical structure with an arc-shaped channel on its surface. The valve core rotates through a bearing. The moving connection is inside the valve body; the transmission mechanism includes a transmission gear and a manual operating lever, the transmission gear is fixedly connected to one end of the valve core, and the manual operating lever is meshed with the transmission gear; the dust removal device includes a vibrator and a connecting bracket, the vibrator is fixedly connected to the outer wall of the main discharge pipe through the connecting bracket; the sealing connecting ring is set at the dust inlet of the main discharge pipe, the inner circular surface of the sealing connecting ring is provided with a trapezoidal sealing groove, and the trapezoidal sealing groove is filled with a rubber sealing ring; the buffer shock absorber is set at the connection between the support base and the main discharge pipe, and the buffer shock absorber includes a spring buffer assembly and a shock-absorbing pad.

[0005] The technical advantages of the biomass pellet boiler ash discharge pipe provided by this utility model are as follows: By setting up a curved L-shaped main discharge pipe in conjunction with a rotary valve, the discharge flow rate and direction of ash can be effectively controlled, preventing ash from accumulating and clogging the pipe. The vibrator of the ash cleaning device can periodically remove the accumulated ash from the inner wall of the pipe, keeping the pipe unobstructed. The trapezoidal sealing groove structure of the sealing connection ring provides a reliable sealing effect, preventing ash leakage. The buffer shock absorber can reduce the impact of vibration generated during boiler operation on the discharge pipe, extending its service life.

[0006] Based on the above technical solution, the ash discharge pipe of the biomass pellet boiler of this utility model can be further improved as follows: The support base includes a base plate and a column; the base plate has a rectangular structure with bolt holes at its four corners; the column is vertically fixed to the center of the base plate, and a through hole is opened at the geometric center of the column. The lower end of the main discharge pipe passes through the through hole and is fixedly connected to the column by welding.

[0007] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the rectangular base plate provides a stable supporting foundation, and the bolt holes at the four corners facilitate fixing and installation. The central through-hole design of the column allows the main discharge pipe to pass through and be firmly connected, forming a stable supporting structure, ensuring that the entire discharge system will not shift or sway during operation, thus improving the stability and reliability of the system.

[0008] Furthermore, the arc-shaped channels on the surface of the valve core of the rotary valve are distributed in a spiral shape, and the spiral angle of the arc-shaped channels is 30 degrees to 60 degrees; bearing seats are provided at both ends of the valve core, and the bearing seats are rotatably connected to the inner wall of the valve body through ball bearings; the transmission gear is a spur gear with 20 to 40 teeth, and the length of the manual operating lever is 150 mm to 300 mm.

[0009] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the spiral arc-shaped channel design enables the ash and slag to rotate as they pass through the valve core, preventing large particles of ash and slag from clogging the channel. The spiral angle of 30 to 60 degrees ensures smooth passage of ash and slag while providing appropriate resistance control. The ball bearing connection reduces the frictional resistance during valve core rotation, making manual operation easier and extending the service life of the valve.

[0010] Furthermore, the vibrator of the dust removal device is an electromagnetic vibrator, the outer shell of the vibrator is cylindrical, and the bottom of the outer shell is provided with a mounting flange; the connecting bracket includes a support arm and a fixing plate, one end of the support arm is bolted to the mounting flange of the vibrator, and the other end is welded to the fixing plate, and the fixing plate is fixed to the outer wall of the main discharge pipe by U-shaped clamps.

[0011] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the high-frequency vibration generated by the electromagnetic vibrator can effectively loosen the ash and slag adhering to the inner wall of the pipe, preventing clumping. The connection structure of the support arm and the fixing plate ensures that the vibrator can be stably installed on the outer wall of the pipe, and the vibration force can be effectively transmitted to the inside of the pipe. The design of the U-shaped clamp facilitates disassembly and maintenance, while providing a reliable fixing effect.

[0012] Furthermore, the main discharge pipe is made of stainless steel with a wall thickness of 3 to 8 millimeters, and the bending radius of the curved section of the main discharge pipe is 1.5 to 3 times the inner diameter of the pipe.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: Stainless steel material has good corrosion resistance and high temperature resistance, and can withstand the high temperature and corrosive gases produced by biomass combustion. A pipe wall thickness of 3 mm to 8 mm ensures the strength of the pipeline while avoiding excessive material consumption. A reasonable bending radius design reduces the accumulation of ash and slag at bends, lowering the risk of pipeline blockage.

[0014] Furthermore, the spring buffer assembly of the shock absorber includes an outer shell and an internal spring; the outer shell has a cylindrical structure, with its upper end fixedly connected to the bottom of the main discharge pipe and its lower end fixedly connected to the top of the column; the internal spring is a helical compression spring, with its two ends contacting the upper and lower end faces of the outer shell respectively; the shock-absorbing pad is made of rubber and is located at the connection between the outer shell and the column.

[0015] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the spring buffer assembly can absorb the vibration and impact generated during boiler operation, protecting the main discharge pipe from damage. The helical compression spring provides appropriate buffering force, absorbing vibration without affecting the normal operation of the pipe. The rubber damping pads further enhance the damping effect while providing a sealing function to prevent vibration from being transmitted to the support base.

[0016] Furthermore, the outer wall surface of the main discharge pipe is provided with multiple heat dissipation fins, which are distributed in a ring on the outer wall of the main discharge pipe.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the heat dissipation fins increase the heat dissipation surface area of ​​the main discharge pipe, which can effectively reduce the temperature inside the pipe and prevent high temperature from causing thermal damage to the pipe material. The ring-shaped distribution design ensures uniform heat dissipation, avoids local overheating, extends the service life of the pipe, and reduces the temperature of the surrounding environment.

[0018] Furthermore, the cross-section of the trapezoidal sealing groove of the sealing connecting ring is an isosceles trapezoid, and the length of the upper base of the trapezoidal sealing groove is less than the length of the lower base.

[0019] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The isosceles trapezoidal cross-section sealing groove design utilizes the wedge sealing principle, which allows the rubber sealing ring to fit more tightly against the groove wall when under pressure, providing a better sealing effect. The design of the upper bottom edge being smaller than the lower bottom edge makes it easier to position the sealing ring during installation, and at the same time, it forms a self-locking effect during use to prevent the sealing ring from falling off.

[0020] Furthermore, the cross-section of the arc-shaped channel of the valve core is elliptical, and the major axis of the ellipse is perpendicular to the axis of the valve core.

[0021] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the arc-shaped channel design with an elliptical cross-section can reduce the resistance when ash and slag pass through, and the streamlined elliptical shape is conducive to the smooth flow of ash and slag. The arrangement with the major axis perpendicular to the valve core axis maximizes the channel opening area, improves the ash and slag throughput capacity, and the elliptical shape is also conducive to cleaning and maintenance.

[0022] Furthermore, the number of heat dissipation fins is 12 to 24, and the multiple heat dissipation fins are equidistantly distributed along the axial direction of the main discharge pipe.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the configuration of 12 to 24 heat dissipation fins ensures sufficient heat dissipation while avoiding the increased manufacturing costs caused by too many fins. The equidistant distribution ensures uniform heat dissipation along the axial direction of the pipe, avoiding local overheating or underheating, and giving the entire piping system better thermal stability and reliability. Compared with existing technologies, the beneficial effects of this utility model's biomass pellet boiler ash discharge pipeline are as follows: This utility model, through a curved L-shaped main discharge pipeline structure combined with a spiral arc-shaped rotary valve, achieves precise control and anti-clogging functions for ash discharge. The electromagnetic vibrator of the ash cleaning device can periodically remove accumulated ash from the inner wall of the pipeline, maintaining long-term unobstructed operation. The sealing connection ring adopts a trapezoidal sealing groove design, combined with a rubber sealing ring, providing a reliable sealing effect and preventing ash leakage and environmental pollution. The buffer shock absorber, through a combination of spring buffer components and rubber shock-absorbing pads, effectively absorbs boiler operating vibrations and protects the discharge pipeline system. The annular distribution design of the heat dissipation fins enhances the system's heat dissipation capacity and prevents high-temperature damage. The entire system has a reasonable structure, stable operation, and convenient maintenance, significantly improving the efficiency and reliability of ash discharge from biomass pellet boilers, and solving the technical problems of easy clogging, difficult control, and short lifespan of traditional discharge pipelines. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of an ash discharge pipeline for a biomass pellet boiler. Figure 2 A schematic diagram of a rotary valve in a biomass pellet boiler ash discharge pipeline; Figure 3 A schematic diagram of the top of a rotary valve in a biomass pellet boiler ash discharge pipeline; The attached diagram lists the components represented by each number as follows: 1. Main discharge pipe; 2. Rotary valve; 21. Valve body; 22. Valve core; 23. Transmission mechanism; 231. Transmission gear; 232. Manual operating lever; 3. Ash removal device; 4. Support base. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0027] like Figure 1The diagram shows a first embodiment of an ash discharge pipe for a biomass pellet boiler provided by this utility model. In this embodiment, it includes: a main discharge pipe 1, a rotary valve 2, an ash cleaning device 3, a support base 4, a sealing connecting ring, and a buffer shock absorber. The main discharge pipe 1 is fixedly connected to the support base 4. The main discharge pipe 1 has a curved L-shaped structure, with an ash inlet at the upper end and an ash outlet at the lower end. A rotary valve 2 is located in the middle of the main discharge pipe 1. The rotary valve 2 includes a valve body 21, a valve core 22, and a transmission mechanism 23. The valve body 21 is fixed to the pipe wall of the main discharge pipe 1 via a flange connection. The valve core 22 has a cylindrical structure and an arc-shaped channel on its surface. The valve core 22 is rotatably connected to the valve body 21 via a bearing; the transmission mechanism 23 includes a transmission gear 231 and a manual operating lever 232, the transmission gear 231 is fixedly connected to one end of the valve core 22, and the manual operating lever 232 is meshed with the transmission gear 231; the dust removal device 3 includes a vibrator and a connecting bracket, the vibrator is fixedly connected to the outer wall of the main discharge pipe 1 via the connecting bracket; the sealing connecting ring is set at the dust inlet of the main discharge pipe 1, the inner circular surface of the sealing connecting ring is provided with a trapezoidal sealing groove, and the trapezoidal sealing groove is filled with a rubber sealing ring; the buffer shock absorber is set at the connection between the support base 4 and the main discharge pipe 1, and the buffer shock absorber includes a spring buffer assembly and a shock-absorbing pad.

[0028] In the above technical solution, the support base 4 includes a base plate and a column; the base plate has a rectangular structure and bolt holes are provided at its four corners; the column is vertically fixedly connected to the center of the base plate, and a through hole is opened at the geometric center of the column. The lower end of the main discharge pipe 1 passes through the through hole and is fixedly connected to the column by welding.

[0029] Furthermore, in the above technical solution, the arc-shaped channels on the surface of the valve core 22 of the rotary valve 2 are distributed in a spiral shape, and the spiral angle of the spiral arc-shaped channels is 30 degrees to 60 degrees; the two ends of the valve core 22 are respectively provided with bearing seats, and the bearing seats are rotatably connected to the inner wall of the valve body 21 through ball bearings; the transmission gear 231 is a spur gear with 20 to 40 teeth, and the length of the manual operating lever 232 is 150 mm to 300 mm.

[0030] Furthermore, in the above technical solution, the vibrator of the dust removal device 3 is an electromagnetic vibrator. The outer shell of the vibrator has a cylindrical structure and a mounting flange is provided at the bottom of the outer shell. The connecting bracket includes a support arm and a fixing plate. One end of the support arm is bolted to the mounting flange of the vibrator, and the other end is welded to the fixing plate. The fixing plate is fixed to the outer wall of the main discharge pipe 1 by U-shaped clamps.

[0031] Furthermore, in the above technical solution, the material of the main discharge pipe 1 is stainless steel, the pipe wall thickness is 3 mm to 8 mm, and the bending radius of the bent part of the main discharge pipe 1 is 1.5 to 3 times the inner diameter of the pipe.

[0032] Furthermore, in the above technical solution, the spring buffer assembly of the shock absorber includes an outer shell and an internal spring; the outer shell has a cylindrical structure, with its upper end fixedly connected to the bottom of the main discharge pipe 1 and its lower end fixedly connected to the top of the column; the internal spring is a helical compression spring, with its two ends contacting the upper and lower end faces of the outer shell respectively; the shock-absorbing pad is made of rubber and is installed at the connection between the outer shell and the column.

[0033] Furthermore, in the above technical solution, the outer wall surface of the main discharge pipe 1 is provided with multiple heat dissipation fins, which are distributed in a ring on the outer wall of the main discharge pipe 1.

[0034] Furthermore, in the above technical solution, the cross-section of the trapezoidal sealing groove of the sealing connecting ring is an isosceles trapezoid, and the length of the upper base of the trapezoidal sealing groove is less than the length of the lower base.

[0035] Furthermore, in the above technical solution, the cross-section of the arc-shaped channel of the valve core 22 is elliptical, and the major axis of the ellipse is perpendicular to the axis of the valve core 22.

[0036] Furthermore, in the above technical solution, the number of heat dissipation fins is 12 to 24, and the multiple heat dissipation fins are equidistantly distributed along the axial direction of the main discharge pipe 1.

[0037] The following is a specific embodiment 1 of this utility model: The biomass pellet boiler ash discharge pipe in this embodiment is mainly used in a biomass pellet boiler system with a rated power of 500 kW. The main discharge pipe is made of 316L stainless steel, with an inner diameter of 150 mm, a wall thickness of 5 mm, a horizontal section length of 800 mm, a vertical section length of 1200 mm, and a bending radius of 225 mm. The base plate of the support base is 600×600×15 mm in size, made of Q235 carbon steel, and hot-dip galvanized for corrosion protection. The column height is 400 mm, the outer diameter is 200 mm, the wall thickness is 8 mm, and the diameter of the central through hole is 160 mm. The valve body of the rotary valve is made of cast steel, and the flange connection size is designed according to the DN150 standard. The valve core is cylindrical, 145 mm in diameter and 180 mm in length, with three helical arc-shaped channels on its surface. The helix angle is 45 degrees, and each channel is 25 mm wide and 15 mm deep. The transmission gear is a 20-tooth spur gear with a module of 4, made of 45# steel with a heat treatment process. The manual operating lever is 250 mm long and 20 mm in diameter, with a non-slip handle at the end. The dust removal device uses a 200-watt electromagnetic vibrator with a vibration frequency of 50 Hz and a vibration force of 1000 Newtons. The support arm of the connecting bracket is 150 mm long, and the fixing plate measures 120×80×8 mm. The sealing ring has an inner diameter of 155 mm, an outer diameter of 180 mm, a height of 25 mm, a trapezoidal sealing groove depth of 8 mm, an upper base width of 6 mm, and a lower base width of 10 mm. The rubber sealing ring is made of nitrile rubber with a hardness of 70 degrees Celsius. The shock absorber's outer casing has an inner diameter of 100 mm, an outer diameter of 120 mm, and a height of 150 mm. The built-in helical compression spring has an outer diameter of 95 mm, a wire diameter of 8 mm, 12 effective turns, and a spring stiffness of 50 N / mm. The damping pads are 10 mm thick and made of natural rubber. There are 18 heat dissipation fins, each 40 mm high and 3 mm thick, spaced 100 mm apart along the pipe axis. The entire system exhibits excellent performance in actual operation, with no dust accumulation in the pipes, easy valve operation, significant vibration control, and good heat dissipation. It requires no maintenance or cleaning after 6 months of continuous operation.

[0038] The following is another specific embodiment 2 of this utility model: This embodiment 2 is an improved design based on embodiment 1, tailored to the application needs of large-scale biomass power plants. The inner diameter of the main discharge pipe is increased to 200 mm, and the pipe wall thickness is increased to 8 mm to accommodate a larger ash discharge volume. The valve core diameter of the rotary valve is correspondingly increased to 195 mm, and the number of spiral arc channels is increased to 5, each channel being 30 mm wide and 20 mm deep. The spiral angle is adjusted to 35 degrees to accommodate larger ash particles. The transmission mechanism adopts a worm gear reducer instead of spur gear transmission, with a reduction ratio of 1:30, making operation more labor-saving and precise. The ash cleaning device is equipped with a timer controller, which can automatically control the start and stop of the vibrator, increasing the vibration power to 500 watts, and the vibration frequency can be adjusted within the range of 30 to 80 Hz. The buffer shock absorber adopts a dual-stage shock absorption design, adding a hydraulic damper and spring working in parallel to further improve the shock absorption effect. The heat dissipation fins are changed to a spiral design, which not only increases the heat dissipation area but also guides airflow to form natural convection, improving heat dissipation efficiency. The sealing ring incorporates a spare sealing ring groove, allowing the spare sealing ring to be activated when the main sealing ring wears out, thus improving system reliability and ease of maintenance. The entire improved system is suitable for large biomass boilers ranging from 1000 to 3000 kW, capable of handling larger volumes of ash and slag discharge, and further enhancing system stability and service life.

[0039] The following is another specific embodiment 3 of this utility model: Embodiment 3 is an optimization and improvement specifically for small-scale household biomass pellet boilers based on Embodiment 1. The inner diameter of the main discharge pipe is reduced to 100 mm, with a compact overall design. The horizontal section length is shortened to 600 mm, and the vertical section length is 800 mm, making it more suitable for space constraints in home environments. The rotary valve is simplified to a single-channel design, with only one arc-shaped channel on the valve core, and the channel width is 20 mm, making operation easier. The ash cleaning device adopts a manual tapping design, with tapping point markings on the outer wall of the pipe. Users can use a rubber hammer to periodically tap and clean the ash, resulting in lower costs and simpler maintenance. The support base is designed with a foldable structure for easy transportation and installation, and the base plate size is reduced to 400×400×12 mm. The buffer shock absorber adopts a rubber block design, replacing the helical spring with rubber shock-absorbing blocks, making the structure simpler and more reliable. The number of heat dissipation fins is reduced to 12, but a more optimized fin shape design is adopted, reducing manufacturing costs while ensuring heat dissipation performance. The sealing connection ring is designed with a quick-release structure and uses a clamp connection method, allowing users to quickly complete installation and disassembly without professional tools. The weight of the entire system is reduced by 40% compared to Example 1, and the manufacturing cost is reduced by 30%. It is particularly suitable for small biomass pellet boilers with power ranging from 50 to 200 kilowatts, meeting the practicality and economic needs of household and small commercial users.

[0040] Specifically, the principle of this utility model is as follows: This utility model adopts a curved L-shaped main discharge pipe design, utilizing gravity and inertia to create a natural flow path for ash and slag within the pipe, avoiding ash accumulation at right-angle bends. The rotary valve employs a spiral arc-shaped channel design; when ash and slag pass through the valve core, a spiral motion is generated, utilizing centrifugal force to prevent large ash and slag particles from accumulating within the channel. The electromagnetic vibrator of the ash cleaning device works by generating high-frequency vibrations through electromagnetic induction. The vibration waves are transmitted to the pipe wall, causing the attached ash and slag particles to lose their adhesion and detach. The trapezoidal sealing groove of the sealing connection ring utilizes the wedge sealing principle; when the internal pressure of the system increases, the rubber sealing ring deforms under pressure, fitting more tightly against the groove wall, achieving a self-pressurizing sealing effect. The buffer shock absorber uses the spring damping principle, converting the vibration energy generated by boiler operation into the elastic potential energy of a spring. The vibration energy is further dissipated through rubber damping pads, protecting the pipeline system from impact damage. The heat dissipation fin design is based on the principles of heat transfer. By increasing the heat dissipation surface area and optimizing the heat conduction path, it rapidly transfers heat from inside the pipe to the surrounding environment, reducing the operating temperature of the pipe material. All components of the entire system work together to form an efficient, stable, and reliable ash and slag discharge solution, addressing the technical shortcomings of traditional discharge pipes from multiple levels, including mechanical structure, physical principles, and engineering practice.

[0041] The specific operation or use method of this utility model is as follows: First, install the support base below the boiler ash outlet, and fix the entire device to the ground or support platform through the bolt holes at the four corners of the base plate. Connect the ash inlet of the main discharge pipe to the boiler ash outlet through the sealing connection ring, ensuring that the rubber sealing ring inside the sealing connection ring is completely fitted. Before starting the boiler, check whether the rotary valve is in the closed position, and rotate the manual operating lever to make the arc-shaped channel of the valve core perpendicular to the pipeline axis. After the boiler enters normal operation, adjust the opening of the rotary valve according to the amount of ash generated, and adjust the ash discharge flow by controlling the rotation angle of the valve core through the manual operating lever. Regularly start the electromagnetic vibrator of the ash cleaning device, it is recommended to start it once every 2 to 4 hours of operation, and each vibration time is 5 to 10 minutes, to remove the ash accumulation on the inner wall of the pipe. During continuous boiler operation, the buffer shock absorber will automatically absorb system vibration without manual intervention, but the working status of the spring buffer assembly and shock absorber pads should be checked regularly. When it is necessary to completely stop ash discharge, completely close the rotary valve. At this time, the spiral arc-shaped channel is completely perpendicular to the pipeline axis, forming a completely closed state. The heat dissipation fins automatically dissipate heat during system operation without any special operation, but the fin surface should be kept clean to ensure heat dissipation effect.

Claims

1. A biomass pellet boiler ash discharge pipe, characterized in that, include: The system includes a main discharge pipe, a rotary valve, a dust removal device, a support base, a sealing ring, and a shock absorber. The main discharge pipe, which is L-shaped with an inlet at the top and an outlet at the bottom, is fixedly connected to the support base. A rotary valve is located in the middle of the main discharge pipe. The rotary valve consists of a valve body, a valve core, and a transmission mechanism. The valve body is fixed to the pipe wall via a flange. The valve core is cylindrical with an arc-shaped channel on its surface and is rotatably connected to the valve body via a bearing. The transmission mechanism includes… The device includes a transmission gear and a manual operating lever. The transmission gear is fixedly connected to one end of the valve core, and the manual operating lever is meshed with the transmission gear. The dust removal device includes a vibrator and a connecting bracket. The vibrator is fixedly connected to the outer wall of the main discharge pipe through the connecting bracket. The sealing connecting ring is set at the dust inlet of the main discharge pipe. The inner circular surface of the sealing connecting ring is provided with a trapezoidal sealing groove, and the trapezoidal sealing groove is filled with a rubber sealing ring. The buffer shock absorber is set at the connection between the support base and the main discharge pipe. The buffer shock absorber includes a spring buffer assembly and a shock-absorbing pad.

2. The ash discharge pipe for a biomass pellet boiler according to claim 1, characterized in that, The support base includes a base plate and a column; the base plate has a rectangular structure with bolt holes at its four corners; the column is vertically fixedly connected to the center of the base plate, and a through hole is opened at the geometric center of the column, through which the lower end of the main discharge pipe passes and is fixedly connected to the column by welding.

3. The ash discharge pipe for a biomass pellet boiler according to claim 2, characterized in that, The rotary valve has a spiral distribution of arc-shaped channels on the valve core surface, with a spiral angle of 30 to 60 degrees. Bearing seats are provided at both ends of the valve core, and the bearing seats are rotatably connected to the inner wall of the valve body through ball bearings. The transmission gear is a spur gear with 20 to 40 teeth, and the length of the manual operating lever is 150 mm to 300 mm.

4. The ash discharge pipe for a biomass pellet boiler according to claim 3, characterized in that, The vibrator of the dust removal device is an electromagnetic vibrator. The outer shell of the vibrator has a cylindrical structure and a mounting flange at the bottom of the shell. The connecting bracket includes a support arm and a fixing plate. One end of the support arm is bolted to the mounting flange of the vibrator, and the other end is welded to the fixing plate. The fixing plate is fixed to the outer wall of the main discharge pipe by U-shaped clamps.

5. The ash discharge pipe for a biomass pellet boiler according to claim 4, characterized in that, The main discharge pipe is made of stainless steel with a wall thickness of 3 to 8 millimeters. The bending radius of the curved section of the main discharge pipe is 1.5 to 3 times the inner diameter of the pipe.

6. The ash discharge pipe for a biomass pellet boiler according to claim 5, characterized in that, The spring buffer assembly of the shock absorber includes an outer shell and an internal spring. The outer shell has a cylindrical structure, with its upper end fixedly connected to the bottom of the main discharge pipe and its lower end fixedly connected to the top of the column. The internal spring is a helical compression spring, with its two ends contacting the upper and lower end faces of the outer shell, respectively. The shock-absorbing pad is made of rubber and is located at the connection between the outer shell and the column.

7. The ash discharge pipe for a biomass pellet boiler according to claim 6, characterized in that, The outer wall surface of the main discharge pipe is provided with multiple heat dissipation fins, which are distributed in a ring on the outer wall of the main discharge pipe.

8. The ash discharge pipe for a biomass pellet boiler according to claim 7, characterized in that, The trapezoidal sealing groove of the sealing connecting ring has an isosceles trapezoidal cross-section, and the length of the upper base of the trapezoidal sealing groove is shorter than the length of the lower base.

9. The ash discharge pipe for a biomass pellet boiler according to claim 8, characterized in that, The cross-section of the arc-shaped channel of the valve core is elliptical, and the major axis of the ellipse is perpendicular to the axis of the valve core.

10. A biomass pellet boiler ash discharge pipe according to claim 9, characterized in that, The number of heat dissipation fins is 12 to 24, and multiple heat dissipation fins are equidistantly distributed along the axial direction of the main discharge pipe.

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