A biomass boiler water seal belt ash and slag discharging device

Abstract

The present invention provides a biomass boiler water-sealed belt ash and slag discharging device for connecting with a boiler. The biomass boiler water-sealed belt ash and slag discharging device comprises: a belt conveying mechanism and a water-sealed tank filled with water; the water-sealed tank is arranged at the bottom of the boiler and is used for receiving the ash and slag discharged from the boiler; the belt conveying mechanism comprises a belt, and at least part of the belt is located at the bottom of the water-sealed tank and is used for conveying the ash and slag in the water-sealed tank; the belt conveying mechanism further comprises a stirring plate, and the stirring plate is located in the water-sealed tank and is used for stirring the ash and slag in the water-sealed tank. The ash and slag are conveyed by the movement of the belt conveying mechanism, and through the stirring plate, the problem of stratification of floating ash and the water-sealed belt is solved. The biomass boiler water-sealed belt ash and slag discharging device of the present invention avoids the contact between other equipment components except the belt and the water with ash and slag, greatly reduces the equipment wear rate, and reduces the equipment failure rate.

Description

Technical Field

[0001] The present invention relates to a biomass boiler water-sealed belt ash and slag discharging device. Background Art

[0002] The main ash discharging points of a biomass boiler include ash discharging in front of the furnace, ash discharging at the bottom of the grate, and the bottom of the air preheater. Among them, the commonly used ash discharging method for ash discharging in front of the furnace is hydraulic ash sluicing, and at the same time, an ash water sedimentation tank and an ash sluicing ditch need to be supported, and the civil engineering quantity is large. Therefore, the dry ash discharging method is gradually replacing the traditional wet ash discharging method.

[0003] In the prior art, a common dry ash discharging method is to use a water-sealed scraper conveyor. The trough of the scraper conveyor is also a water-sealed trough. During operation, the chain and scraper of the scraper conveyor are immersed in water.

[0004] The problems with using a water-sealed scraper conveyor are as follows: Since the chain is immersed in water, an ordinary carbon steel chain cannot meet the usage requirements, and a material with strong corrosion resistance is required, increasing the cost and the equipment manufacturing cost is high. Moreover, in the slag discharging in front of the furnace, in addition to the biomass ash after combustion, there is also a large amount of entrained sand. The fine biomass ash and sand will enter the gap between the rollers and sleeves of the chain. After running for a period of time, the chain rollers cannot rotate. When the chain runs, the rolling friction becomes sliding friction, increasing the wear of the equipment slide rail and the power consumption of the motor. At the same time, the risk of chain breakage is also increased. The equipment is easily worn, resulting in a reduction in its service life and a high equipment failure rate. In addition, the water-sealed scraper conveyor is difficult to repair. Once a chain break occurs, it cannot be isolated for repair to make the equipment resume operation, and the furnace needs to be shut down and production stopped, affecting production and manufacturing. Summary of the Invention

[0005] In view of the above problems, the present invention is proposed to provide a biomass boiler water-sealed belt ash and slag discharging device that overcomes the above problems or at least partially solves the above problems.

[0006] To solve the above problems, the present invention discloses a biomass boiler water-sealed belt ash and slag discharging device, which may specifically include a bagasse boiler water-sealed belt ash and slag discharging device. The biomass boiler water-sealed belt ash and slag discharging device is used to connect with a boiler. The biomass boiler water-sealed belt ash and slag discharging device includes: a belt conveying mechanism and a water-sealed trough filled with water; wherein,

[0007] The water-sealed trough is arranged at the bottom of the boiler and is used to receive the ash and slag discharged from the boiler;

[0008] The belt conveying mechanism includes a belt, and at least part of the belt is located at the bottom of the water-sealed trough and is used to convey the ash and slag in the water-sealed trough;

[0009] The belt conveying mechanism further includes a stirring plate located in the water seal tank for stirring the ash residue in the water seal tank.

[0010] Optionally, the belt conveying mechanism further includes: a driving roller and a driven roller;

[0011] The driving roller is located at one end of the water seal tank; the driven roller is located at the other end of the water seal tank;

[0012] The belt is wound around the driving roller and the driven roller. The driving roller drives the belt to move, and the movement of the belt drives the driven roller to move.

[0013] Optionally, the belt conveying mechanism further includes: a plurality of belt pressing wheel assemblies;

[0014] The belt pressing wheel assemblies are connected to the water seal tank, and the belt is located between the water seal tank and the belt pressing wheel assemblies to make the belt close to the water seal tank.

[0015] Optionally, the plurality of belt pressing wheel assemblies are arranged at intervals between the driving roller and the driven roller in sequence and have the same height; among them,

[0016] Among the plurality of belt pressing wheel assemblies, the belt pressing wheel assembly close to the driving roller is the first belt pressing wheel assembly, and the belt pressing wheel assembly close to the driven roller is the second belt pressing wheel assembly;

[0017] The height of the highest point where the driving roller contacts the belt is higher than the height of the contact point between the first belt pressing wheel assembly and the belt, and the height of the highest point where the driven roller contacts the belt is higher than the height of the contact point between the second belt pressing wheel assembly and the belt;

[0018] The transmission path of the belt includes a horizontal transmission section, a first inclined transmission section, and a second inclined transmission section. The horizontal transmission section is the transmission section between the first belt pressing wheel assembly and the second belt pressing wheel assembly, the first inclined transmission section is the transmission section between the first belt pressing wheel assembly and the driving roller, and the second inclined transmission section is the transmission section between the second belt pressing wheel assembly and the driven roller.

[0019] Optionally, the inclination angle between the first inclined transmission section and the horizontal transmission section is 15° - 20°, and the inclination angle between the second inclined transmission section and the horizontal transmission section is 15° - 20°.

[0020] Optionally, the belt pressing wheel assembly includes: a first side wheel, a second side wheel, and a central shaft;

[0021] The first side wheel and the second side wheel are arranged at a relative interval, the central shaft penetrates through the first side wheel and the second side wheel, and is fixedly connected to the first side wheel and the second side wheel;

[0022] Both ends of the central shaft are rotatably connected to the bearing seats, the bearing seats are slidably connected to the bracket, and the bracket is fixedly connected to the water seal groove.

[0023] Optionally, the stirring plate is connected between the first side wheel and the second side wheel, and is arranged near the edges of the first side wheel and the second side wheel;

[0024] The movement of the belt drives the stirring plate on the belt pressing wheel assembly to move, so that the upper floating ash and the bottom ash slag in the water seal groove are stirred evenly, solving the problem of stratification between the belt and the floating ash during the movement of the belt, thereby solving the problem of the accumulated floating ash blocking the ash and slag outlet of the boiler.

[0025] Optionally, the biomass boiler water seal belt ash and slag discharging device further includes: a height adjustment structure;

[0026] The height adjustment structure is arranged at both ends of the central shaft and is respectively connected to the central shaft and the outside of the water seal groove;

[0027] The height adjustment structure adjusts the height of the central shaft on the water seal groove to adjust the height of the belt pressing wheel assembly, so as to ensure that the belt fits the bottom of the water seal groove.

[0028] Optionally, the height adjustment structure includes: a bracket, a bearing seat, a screw rod and a nut;

[0029] The bracket is fixed to the water seal groove, and the nut is fixed to the bracket;

[0030] The bearing seats are rotatably connected to both ends of the central shaft, and the bearing seats are slidably connected to the bracket;

[0031] One end of the screw rod is hung and connected to the bearing seat, and the other end passes through the bracket and meshes with the nut on the bracket. When the screw rod rotates in the nut, the bearing seat can be driven to slide on the bracket to adjust the height of the central shaft on the water seal groove.

[0032] Optionally, the biomass boiler water seal belt ash and slag discharging device further includes: an overflow port and a water replenishing pipeline;

[0033] The overflow port is arranged on the water seal groove for discharging the water in the water seal groove;

[0034] The make-up water pipeline is arranged in the water seal tank. After the valve of the make-up water pipeline is adjusted to a preset position, it is normally open and used to inject water into the water seal tank.

[0035] The present invention has the following advantages: At least part of the belt of the biomass boiler water seal belt ash and slag discharging device is located at the bottom of the water seal tank. The water seal tank is used to receive the ash and slag discharged from the boiler, maintain negative pressure through water sealing, and cool the high-temperature ash and slag. The belt at least partially located at the bottom of the water seal tank will convey the ash and slag cooled by water in the water seal tank as the belt conveying mechanism moves, so that the ash and slag are conveyed away from the water seal tank by the conveyor belt, completing the output of the ash and slag in front of the boiler. The belt conveying mechanism further includes a stirring plate, and the stirring plate is located in the water seal tank and used to stir the ash and slag in the water seal tank. As the stirring plate moves along with the pressing wheel assembly, the water in the water seal tank is fully mixed with the ash and slag, so that the floating ash on the liquid surface and the sediment on the belt surface are mixed in the water, avoiding the problem that the floating ash cannot be carried away due to stratification during the movement of the belt, and solving the problem that the floating ash accumulates and finally blocks the ash and slag discharging port of the boiler. Compared with the existing water seal scraper conveyor, the biomass boiler water seal belt ash and slag discharging device of the present invention does not require chains and scrapers with strong corrosion resistance, avoiding the contact of other equipment components except the belt with the water containing ash and slag, greatly reducing the equipment wear rate, and reducing the equipment failure rate and equipment investment. Description of the Drawings

[0036] Figure 1 is a schematic structural diagram of a biomass boiler water seal belt ash and slag discharging device of the present invention;

[0037] Figure 2 is a schematic cross-sectional structure diagram of A-A of a biomass boiler water seal belt ash and slag discharging device of the present invention;

[0038] Figure 3 is an enlarged schematic diagram of the height adjustment structure of a biomass boiler water seal belt ash and slag discharging device of the present invention.

[0039] Explanation of the Reference Numerals in the Drawings:

[0040] 10 - Belt conveying mechanism; 20 - Water seal tank; 11 - Belt; 12 - Driving drum; 13 - Driven drum; 14 - Pressing wheel assembly; 15 - First pressing wheel assembly; 16 - Second pressing wheel assembly; 111 - First inclined transmission section; 112 - Horizontal transmission section; 113 - Second inclined transmission section; 141 - First side wheel; 142 - Second side wheel; 143 - Central shaft; 144 - Stirring plate; 17 - Height adjustment structure; 171 - Bracket; 172 - Bearing seat; 173 - Screw; 174 - Nut; 21 - Overflow port; 22 - Make-up water pipeline. Detailed Embodiments

[0041] To make the above objects, features, and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] For the biomass boiler water seal belt ash and slag discharging device of the present invention, at least part of the belt is located at the bottom of the water seal tank. The water seal tank is used to receive the ash and slag discharged from the boiler, maintain negative pressure through water sealing with water, and cool the high-temperature ash and slag. The belt that is at least partially located at the bottom of the water seal tank will convey the cooled ash and slag in the water seal tank as the belt conveying mechanism moves, so that the ash and slag are conveyed away from the water seal tank by the conveyor belt, completing the output of the ash and slag in front of the boiler. The belt conveying mechanism further includes a stirring plate, and the stirring plate is located in the water seal tank and is used to stir the ash and slag in the water seal tank. Through the movement of the stirring plate 144, the water in the water seal tank is fully mixed with the ash and slag, so that the floating ash on the liquid surface and the sediment on the belt surface are mixed with water, solving the problem of stratification between the floating ash and the water seal belt, and avoiding the problem of the accumulation of floating ash blocking the ash and slag discharging port of the boiler. Compared with the existing water seal scraper conveyor, the biomass boiler water seal belt ash and slag discharging device of the present invention does not require chains and scrapers with strong corrosion resistance, avoiding the contact of other equipment components except the belt with the water containing ash and slag, greatly reducing the equipment wear rate and reducing the equipment failure rate.

[0043] Referring to Figures 1 to 2 , a schematic structural diagram of a biomass boiler water seal belt ash and slag discharging device of the present invention is shown. The biomass boiler water seal belt ash and slag discharging device is used to be connected to the boiler. The biomass boiler water seal belt ash and slag discharging device includes: a belt conveying mechanism 10 and a water seal tank 20 filled with water; wherein, the water seal tank 20 is arranged at the bottom of the boiler and is used to receive the ash and slag discharged from the boiler; the belt conveying mechanism 10 includes a belt 11, and at least part of the belt 11 is located above the bottom of the water seal tank 20 and is used to convey the ash and slag in the water seal tank 20. The belt conveying mechanism further includes a stirring plate 144, and the stirring plate 144 is located in the water seal tank 20 and is used to stir the ash and slag in the water seal tank 20.

[0044] The belt 11 of the ash and slag discharging device of the biomass boiler water seal belt is at least partially located above the bottom of the water seal tank 20. The water seal tank 20 is used to receive the ash and slag discharged from the boiler, maintain negative pressure through water sealing with water, and cool the high-temperature ash and slag. At the same time, the water seal tank 20 also plays a certain role in supporting and protecting the belt 11. The belt 11 at least partially located above the bottom of the water seal tank 20 has a sliding friction with the water seal tank 20. The belt 11 at least partially located above the bottom of the water seal tank 20 will convey the ash and slag cooled in the water seal tank 20 along with the movement of the belt conveying mechanism 10, so that the ash and slag are conveyed away from the water seal tank 20 by the conveyor belt, completing the output of the ash and slag in front of the boiler. Through the movement of the stirring plate 144, the water in the water seal tank 20 is fully mixed with the ash and slag, so that the floating ash on the liquid surface and the sediment on the belt surface are mixed with water, solving the problem of the stratification of the floating ash and the water seal belt, and avoiding the problem of the accumulation of floating ash blocking the ash and slag discharge port of the boiler. Compared with the existing water seal scraper conveyor, the ash and slag discharging device of the biomass boiler water seal belt of the present invention does not require carbon steel chains with strong corrosion resistance in water, avoiding the contact of other equipment components except the belt 11 with the water with ash and slag, greatly reducing the equipment wear rate and reducing the equipment failure rate.

[0045] Optionally, in the embodiment of the present invention, the belt 11 may include: canvas belt, rubber belt, nylon belt, PU belt, polyester belt, etc. In actual applications, the specific type of the belt 11 in the embodiment of the present invention may not be limited.

[0046] Optionally, the belt conveying mechanism 10 further includes: a driving roller 12 and a driven roller 13; the driving roller 12 is located at one end of the water seal tank 20; the driven roller 13 is located at the other end of the water seal tank 20; the belt 11 is wound around the driving roller 12 and the driven roller 13, and the driving roller 12 drives the belt 11 to move, and the movement of the belt 11 drives the driven roller 13 to move.

[0047] In the embodiment of the present invention, the driving roller 12 serves as the driving power source. The movement of the driving roller 12 drives the belt 11 wound around it to move, and the movement of the belt 11 drives the driven roller 13 to move, thereby realizing the cyclic movement of the belt 11.

[0048] Optionally, the belt conveying mechanism 10 further includes a belt lower idler and a redirecting idler. The belt lower idler is used to support the movement of the belt 11, and the redirecting idler is used to change the movement direction of the belt 11 so that part of the belt 11 fits the water seal tank 20 to move. In actual applications, if the belt lower idler and the redirecting idler are damaged or worn due to long-term use, they can be replaced and repaired in real time without stopping the furnace and production, which is convenient for maintenance during production.

[0049] Optionally, the belt conveying mechanism 10 further includes: a plurality of belt pressing wheel assemblies 14; the belt pressing wheel assemblies 14 are connected to the water seal groove 20, and the belt 11 is located between the water seal groove 20 and the belt pressing wheel assemblies 14, so that the belt 11 is closely attached to the water seal groove 20. The belt pressing wheel assemblies 14 press the belt 11 against the water seal groove 20, avoiding wrinkles on the belt 11 as the belt conveying mechanism 10 moves, and preventing the ash and slag on the belt 11 from displacing relative to the belt 11.

[0050] In the embodiment of the present invention, the number of the belt pressing wheel assemblies 14 can be increased or decreased correspondingly according to the length of the belt. The 4 belt pressing wheel assemblies 14 in the appendix are only for illustration. In practical applications, the specific number of the belt pressing wheel assemblies 14 in the embodiment of the present invention can be not limited. Figure 1 In practical applications, the specific number of the belt pressing wheel assemblies 14 in the embodiment of the present invention can be not limited.

[0051] Optionally, the plurality of belt pressing wheel assemblies 14 are sequentially arranged at intervals between the driving roller 12 and the driven roller 13 and have the same height; among the plurality of belt pressing wheel assemblies 14, the belt pressing wheel assembly close to the driving roller 12 is the first belt pressing wheel assembly 15, and the belt pressing wheel assembly close to the driven roller 13 is the second belt pressing wheel assembly 16; the height of the highest point where the driving roller contacts the belt is higher than the height of the contact point between the first belt pressing wheel assembly and the belt, and the height of the highest point where the driven roller contacts the belt is higher than the height of the contact point between the second belt pressing wheel assembly and the belt; the transmission path of the belt 11 includes a horizontal transmission section 112, a first inclined transmission section 111 and a second inclined transmission section 113. The horizontal transmission section 112 is the transmission section between the first belt pressing wheel assembly 15 and the second belt pressing wheel assembly 16, the first inclined transmission section 111 is the transmission section between the first belt pressing wheel assembly 15 and the driving roller 12, and the second inclined transmission section 113 is the transmission section between the second belt pressing wheel assembly 16 and the driven roller 13.

[0052] In the embodiment of the present invention, the transmission section between the first belt pressing wheel assembly 15 and the second belt pressing wheel assembly 16 forms the horizontal transmission section 112, enabling the ash and slag on the belt 11 to be smoothly conveyed; the transmission section between the first belt pressing wheel assembly 15 and the driving roller 12 forms the first inclined transmission section 111, and the transmission section between the second belt pressing wheel assembly 16 and the driven roller 13 forms the second inclined transmission section 113. The first inclined transmission section 111 and the second inclined transmission section 113 make the belt 11 conform to the inclination at both ends of the water seal groove 20, so that the ash and slag on the belt 11 are conveyed away from the water seal groove 20 by the conveyor belt.

[0053] Optionally, the inclination angle between the first inclined transmission section 111 and the horizontal transmission section 112 is 15°-20°, and the inclination angle between the second inclined transmission section 113 and the horizontal transmission section 112 is 15°-20°. By setting the inclination angles between the first inclined transmission section 111 and the horizontal transmission section 112, and between the second inclined transmission section 113 and the horizontal transmission section 112 within the above-mentioned range of angle values, the ash can be stabilized on the belt 11 without displacement along with the movement of the belt 11.

[0054] Optionally, the belt pressing wheel assembly 14 includes: a first side wheel 141, a second side wheel 142, and a central shaft 143; the first side wheel 141 and the second side wheel 142 are arranged at intervals relatively, the central shaft 143 penetrates through the first side wheel 141 and the second side wheel 142, and is fixedly connected to the first side wheel 141 and the second side wheel 142; both ends of the central shaft 143 are rotatably connected to the water seal groove 20. The central shaft 143 is fixedly connected to the first side wheel 141 and the second side wheel 142, so that the belt 11 is pressed tightly along its width direction by the two spaced side wheels and is closely attached to the water seal groove 20.

[0055] Optionally, the stirring plate 144 is connected between the first side wheel 141 and the second side wheel 142 and is arranged close to the edges of the first side wheel 141 and the second side wheel 142; the movement of the belt 11 drives the stirring plate 144 on the belt pressing wheel assembly 14 to move, so as to stir the ash in the water seal groove 20. By the stirring plate 144 moving along with the belt pressing wheel, the upper floating ash and the bottom ash in the water seal groove are stirred evenly, solving the problem of stratification between the floating ash and the belt during the movement of the belt, and thus solving the problem of the accumulated floating ash blocking the ash discharge and slag discharge ports of the boiler.

[0056] Specifically, the first belt pressing wheel assembly 15 and the second belt pressing wheel assembly 16 mainly function to press the belts 11 at both ends of the belt conveying mechanism 10 tightly, avoiding the belt 11 from wrinkling along with the movement of the belt conveying mechanism 10, and making the ash on the belt 11 prone to displacement relative to the belt 11. The remaining belt pressing wheel assemblies 14 mainly play a role in stirring the ash in the water seal groove 20 through the stirring plate 144. By the stirring plate 144 moving along with the belt pressing wheel, the upper floating ash and the bottom ash in the water seal groove are stirred evenly, solving the problem of stratification between the floating ash and the belt during the movement of the belt, and thus solving the problem of the accumulated floating ash blocking the ash discharge and slag discharge ports of the boiler.

[0057] Optionally, the ash and slag discharging device for the water-sealed belt of the biomass boiler further includes: a height adjustment structure 17; the height adjustment structure 17 is provided at both ends of the central shaft 143 and is respectively connected to the central shaft 143 and the outside of the water-sealed tank 20; the height adjustment structure 17 adjusts the height of the central shaft 143 on the water-sealed tank 20 to adjust the height of the belt pressing wheel assembly 14. By adjusting the height of the central shaft on the water-sealed tank 20 up and down, the height of the belt pressing wheel assembly 14 on the water-sealed tank 20 is adjusted, so that the height of the belt pressing wheel assembly 14 adapts to the thickness of the belt 11 for adjustment, thereby pressing the belt 11 tightly to ensure that the belt 11 fits the bottom of the water-sealed tank 20..

[0058] Referring to Figure 3 , a schematic enlarged view of the structure of the height adjustment structure 17 of the present invention is shown. The height adjustment structure 17 includes: a bracket 171, a bearing seat 172, a screw 173 and a nut 174; the bracket 171 is fixed to the water-sealed tank 20, and the nut 173 is fixed to the bracket 171; the bearing seat 172 is rotatably connected to both ends of the central shaft 143, and the bearing seat 172 is slidably connected to the bracket 171; one end of the screw 173 is hung and connected to the bearing seat 172, and the other end passes through the bracket 171 and meshes with the nut 174 on the bracket 171. When the screw 173 rotates in the nut 174, the bearing seat 172 can be driven to slide on the bracket 171 to adjust the height of the central shaft 143 on the water-sealed tank 20. By screwing the screw 173, the bearing seat 172 can slide up and down on the bracket 171, so that the central shaft 143 connected to the bearing seat 172 moves up and down, thereby realizing the height adjustment of the belt pressing wheel assembly 14.

[0059] Optionally, the ash and slag discharging device for the water-sealed belt of the biomass boiler further includes: an overflow port 21 and a water supply pipeline 22; the overflow port 21 is arranged on the water-sealed tank 20 for discharging the water in the water-sealed tank 20; the water supply pipeline 22 is arranged on the water-sealed tank 20, and the valve of the water supply pipeline is kept open after being adjusted to a preset position for injecting water into the water-sealed tank 20.

[0060] In the embodiment of the present invention, when there is too much water in the water-sealed tank 20, the water will overflow from the water-sealed tank 20. By arranging the overflow port 21 on the water-sealed tank 20, the excess water can be drained to the nearby trench, so that the water in the water-sealed tank 20 can maintain an appropriate water level; since the water in the water-sealed tank 20 will evaporate and be lost during the process of the high-temperature ash and slag falling into the water for cooling, by arranging the water supply pipeline 22 on the water-sealed tank 20, water can be injected into the water-sealed tank 20. To ensure the simplicity and reliability of the operation, when the ash and slag discharging device for the water-sealed belt of the biomass boiler is running normally, after the valve on the water supply pipeline 22 is adjusted to the preset position, it remains open, and the preset position is a position that can keep the water flow stable and appropriate, so that the water in the water-sealed tank 20 can maintain the water-sealing height.

[0061] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the said element.

[0062] The above has introduced in detail a biomass boiler water seal belt ash and slag discharging device provided by the present invention. Specific examples are used in this text to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A biomass boiler water-sealed belt ash and slag discharging device, which is used to connect with a boiler, and is characterized in that, The ash and slag discharging device of the biomass boiler water seal belt includes: a belt conveying mechanism and a water seal tank filled with water; wherein, The water seal tank is arranged at the bottom of the boiler and is used for receiving the ash and slag discharged from the boiler; The belt conveying mechanism includes a belt, and at least a part of the belt is located at the bottom of the water seal tank and is used for conveying the ash and slag in the water seal tank; The belt conveying mechanism further includes a stirring plate, and the stirring plate is located in the water seal tank and is used for stirring the ash and slag in the water seal tank; The belt conveying mechanism further includes: a driving roller and a driven roller; The driving roller is located at one end of the water seal tank; the driven roller is located at the other end of the water seal tank; The belt is wound around the driving roller and the driven roller, the driving roller drives the belt to move, and the movement of the belt drives the driven roller to move; The belt conveying mechanism further includes: a plurality of belt pressing wheel assemblies; The belt pressing wheel assemblies are connected to the water seal tank, and the belt is located between the water seal tank and the belt pressing wheel assemblies so that the belt is close to the water seal tank; The belt pressing wheel assembly includes: a first side wheel, a second side wheel and a central shaft; The first side wheel and the second side wheel are arranged relatively at intervals, the central shaft penetrates through the first side wheel and the second side wheel, and is fixedly connected to the first side wheel and the second side wheel; The stirring plate is connected between the first side wheel and the second side wheel and is arranged close to the edges of the first side wheel and the second side wheel; The movement of the belt drives the stirring plate on the belt pressing wheel assembly to move, so that the floating ash on the upper layer and the bottom ash and slag in the water seal tank are stirred evenly; The ash and slag discharging device of the biomass boiler water seal belt further includes: a height adjustment structure; The height adjustment structure is arranged at both ends of the central shaft and is respectively connected to the central shaft and the water seal tank; The height adjustment structure adjusts the height of the central shaft on the water seal tank to adjust the height of the belt pressing wheel assembly, so as to ensure that the belt fits the bottom of the water seal tank.

2. The biomass boiler water-sealed belt ash and slag discharging device according to claim 1, characterized in that, The plurality of belt pressing wheel assemblies are arranged at intervals in sequence between the driving roller and the driven roller, and have the same height; wherein, Among the plurality of belt pressing wheel assemblies, the belt pressing wheel assembly close to the driving roller is the first belt pressing wheel assembly, and the belt pressing wheel assembly close to the driven roller is the second belt pressing wheel assembly; The height of the highest point where the driving roller contacts the belt is higher than the height of the contact point between the first belt pressing wheel assembly and the belt, and the height of the highest point where the driven roller contacts the belt is higher than the height of the contact point between the second belt pressing wheel assembly and the belt; The transmission path of the belt includes a horizontal transmission section, a first inclined transmission section and a second inclined transmission section; the horizontal transmission section is the transmission section between the first belt pressing wheel assembly and the second belt pressing wheel assembly, the first inclined transmission section is the transmission section between the first belt pressing wheel assembly and the driving roller, and the second inclined transmission section is the transmission section between the second belt pressing wheel assembly and the driven roller.

3. The biomass boiler water-sealed belt ash and slag discharging device according to claim 2, characterized in that, The inclination angle between the first inclined transmission section and the horizontal transmission section is 15° - 20°, and the inclination angle between the second inclined transmission section and the horizontal transmission section is 15° - 20°.

4. The biomass boiler water-sealed belt ash and slag discharging device according to claim 1, characterized in that, The height adjustment structure includes: a bracket, a bearing seat, a screw rod, and a nut; The bracket is fixed to the water seal groove, and the nut is fixed to the bracket; The bearing seat is rotatably connected to both ends of the central shaft, and the bearing seat is slidably connected to the bracket; One end of the screw rod is hung and connected to the bearing seat, and the other end passes through the bracket and meshes with the nut on the bracket. When the screw rod rotates in the nut, it can drive the bearing seat to slide on the bracket, adjusting the height of the central shaft on the water seal groove.

5. The biomass boiler water-sealed belt ash and slag discharging device according to claim 1, characterized in that, The biomass boiler water seal belt ash and slag discharging device further includes: an overflow port and a water supply pipeline; The overflow port is arranged on the water seal groove for discharging the water in the water seal groove; The water supply pipeline is arranged on the water seal groove. After the valve of the water supply pipeline is adjusted to a preset position, it is normally open for injecting water into the water seal groove.

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