Furnace body structure of whole-bundle straw combustion gasification coupling combustion heating boiler

Abstract

The invention belongs to the technical field of biomass fuel boilers, and particularly relates to a boiler body structure of a whole-bundle straw combustion gasification coupling combustion heat supply boiler, which comprises a boiler body, the side wall of the boiler body is hollow and is filled with a thermal insulation material, a smoke exhaust pipe is arranged at the top of the boiler body, and a fuel chamber is arranged in the boiler body. A heat supply pipe and a fuel input assembly are arranged on the side wall of the furnace body, and the fuel input assembly is used for continuously feeding a whole bundle of straw into the fuel chamber; due to the fact that carbonized semi-coke materials are prone to being broken to generate a large amount of powder materials, and the powder materials are prone to being attached to the inner wall of a feeding pipe and the inner wall of a feeding screw in the conveying process of the feeding pipe, conveying of the semi-coke materials in the feeding pipe is not smooth, and normal proceeding of straw participating in work of a heat supply boiler is affected. According to the feeding device, by arranging the cleaning assembly, semi-coke materials possibly attached to the inner wall of the feeding pipe are effectively cleaned, the semi-coke materials are promoted to fall off from the inner wall of the feeding pipe, then the semi-coke materials are gathered into the moving semi-coke materials under the action of the feeding screw, and normal proceeding of the feeding process is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of biomass fuel boilers, in particular to a furnace body structure of a whole-bundle straw combustion gasification coupled combustion heating boiler. Background Art

[0002] The decoupled combustion technology of straw bale burning gasification is to put the whole bale of straw (about 200 kg) directly into the furnace in batches through the conveyor belt. After the whole bale of straw enters the boiler, it is broken in the furnace. The boiler divides the furnace into a gasification chamber and a combustion chamber. Under the condition of lack of oxygen, the straw fuel is gasified to generate pyrolysis gas and semi-coke, which enter the combustion chamber for combustion, thereby achieving the purpose of suppressing nitrogen oxide (NOX) emissions. The semi-coke material and pyrolysis gas in the combustion chamber maintain high-temperature combustion in the combustion chamber, so that the fuel is fully burned. The negative pressure makes the reducing gas react with the coke in the high-temperature layer, reducing part of the ammonia oxide (NOX), reducing the emission of ammonia oxide (NOX), and effectively reducing the generation of black smoke.

[0003] Technical features: Since the straw fuel is pyrolyzed and gasified, most of the flue gas is generated. Most of the flue gas reburns and drives the semi-coked straw to burn in sections for multiple times, which improves the thermal efficiency and solves the problem of excessive emissions of nitrogen oxides. Since the feeding system adopts automatic sealing facilities, the feeding process will not affect the operation of the combustion chamber. The material enters the furnace for pyrolysis, so that the material is fully burned in the combustion area. The bag breaking in the furnace reduces the manpower input, and the bag breaking, pyrolysis and precipitation in the furnace increase the utilization rate of the material.

[0004] During the process of transporting the carbonized semi-coke to the combustion chamber, the semi-coke is crushed into powder during movement, and is easy to adhere to the feeding device during movement, such as a vibrating feeding device or a spiral feeding device. The continuous accumulation of the adhered powder may easily cause blockage in the movement of the semi-coke, resulting in the boiler being unable to operate normally and requiring manual opening for cleaning, affecting the working efficiency of the heating boiler. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes a furnace body structure of a whole-bundle straw combustion gasification coupled combustion heating boiler.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: the present invention proposes a furnace structure of a whole-bundle straw combustion gasification coupled combustion heating boiler, comprising a furnace body, the side wall of the furnace body is hollow and filled with heat-insulating materials, a smoke exhaust pipe is arranged on the top of the furnace body, a fuel chamber is arranged inside the furnace body, a heating pipe and a fuel input assembly are arranged on the side wall of the furnace body, and the fuel input assembly is used to continuously feed the whole bundle of straw into the fuel chamber; The fuel input assembly includes a feed hopper, the feed hopper is connected to the feed conveyor belt, the bottom of the feed hopper is connected to the feed chamber arranged on the side wall of the furnace body, and the bottom of the feed chamber is connected to the combustion chamber through a feed pipe; the feed pipe is arranged obliquely, and a feeding screw is arranged in the middle position of the feed pipe, and the feeding screw is connected to the output device arranged inside the feed chamber; The side wall of the feeding tube is slidably provided with a plurality of cleaning components, and the cleaning components are used to clean the inside of the feeding tube; the cleaning component comprises a cleaning ring, and a slider arranged on the side wall of the cleaning ring is slidably embedded in a slide groove arranged on the inner wall of the feeding tube; the slider is connected to the slide groove via a return spring; A scraper rod is arranged in the middle part of the cleaning ring, and the scraper rod contacts the upper surface of the spiral plate on the feeding spiral. A passing groove is arranged on the surface of the spiral plate located on the upper side of the scraper rod, and the width of the passing groove is greater than the diameter of the scraper rod.

[0007] Preferably, the inner wall of the feed chamber is provided with a gasification heating device, and the side wall of the feed chamber is connected to the interior of the combustion chamber through a combustion pipe; A conveying hopper is arranged at the bottom of the feeding chamber, the top of the conveying hopper is communicated with the inside of the feeding chamber, and the bottom is connected with the feeding pipe.

[0008] Preferably, the top of the conveying bucket is rotatably connected to the bottom opening of the feed chamber, and the bottom is rotatably connected to the side wall of the feed pipe; a rotating device is provided on the side wall of the bottom outlet of the feed chamber, and the rotating device is connected to the top of the conveying bucket to drive the conveying bucket to rotate, and the inner wall of the conveying bucket is evenly provided with crushing blades.

[0009] Preferably, the cross section of the cleaning ring is an isosceles triangle, and the middle portion of the cleaning ring protrudes toward the central axis of the feed pipe, and the two side ends of the cleaning ring are in close contact with the inner wall of the feed pipe.

[0010] Preferably, the scraper rod is rotatably connected to the cleaning ring, and a torsion spring is provided at the rotatably connected portion; scrapers are evenly provided on the outer surface of the scraper rod, and the scrapers are distributed in an annular manner around the central axis of the cleaning ring; A cleaning groove is arranged in the middle of the end of the scraper, a top plate is slidably arranged inside the cleaning groove, the top plate is connected to the inner wall of the cleaning groove through a spring, and the end of the top plate extending out of the cleaning groove is sharp.

[0011] Preferably, a push rod is provided on the inner wall of the cleaning groove, and the end of the push rod is embedded in a limiting hole provided at a corresponding position on the top plate, and the push rod is slidably connected to the limiting hole; The limiting hole is a through hole, and the end of the push rod passes through the limiting hole and extends to the outside, and the end of the push rod is sharp.

[0012] Preferably, the scraping rod comprises a limiting portion and a cleaning portion, and the connecting portion between the limiting portion and the cleaning portion is made of elastic metal material; The limiting part is connected with the cleaning ring, the scraper is located on the outer surface of the cleaning part, and a vibration device is arranged inside the cleaning part, and the vibration device is controlled by an external controller.

[0013] Preferably, cutting plates are evenly arranged on the inner surface of the cleaning ring, the cutting plates are close to the ends of the cleaning ring, and the sharp ends of the cutting plates point to the ends of the cleaning ring.

[0014] Preferably, cutting teeth are evenly arranged on one side of the cutting plate close to the central axis of the feeding tube, and the evenly distributed cutting teeth are a sawtooth structure.

[0015] Preferably, closing pieces are symmetrically arranged on the inner walls on both sides of the through groove, the ends of the symmetrical closing pieces are close to and in contact with each other, and the closing pieces are close to the upper surface of the spiral plate; and the closing pieces are made of elastic material.

[0016] The beneficial effects of the present invention are as follows: The furnace body structure of the whole-bundle straw combustion gasification coupled combustion heating boiler described in the present invention is that during the transportation process of the feeding pipe, the carbonized semi-coke material is easily broken to produce a large amount of powder, and is easily adhered to the inner wall of the feeding pipe and the feeding spiral during the transportation process of the feeding pipe, resulting in poor transportation of the semi-coke material inside the feeding pipe, thereby affecting the normal operation of the straw heating boiler; therefore, the present application provides a cleaning component to effectively clean the semi-coke material that may adhere to the inner wall of the feeding pipe, prompting it to fall off the inner wall of the feeding pipe, and then merge into the moving semi-coke material under the action of the feeding spiral, thereby realizing the normal feeding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 is a stereogram of the present invention; Figure 2 It is a partial cross-sectional view in the side view direction of the present invention; Figure 3 It is the internal structure diagram of the feeding pipe in the present invention; Figure 4 It is a side view of the internal structure of the feeding pipe in the present invention; Figure 5 is a cross-sectional view of a cleaning ring in the present invention; Figure 6is a three-dimensional diagram of a scraping rod in the present invention; Figure 7 is a cross-sectional view of the scraping rod in the present invention; Figure 8 yes Figure 7 A partial enlarged view of point A in the middle.

[0019] In the figure: furnace body 1, smoke exhaust pipe 11, heating pipe 12, feed chamber 13, conveying bucket 131, crushing blade 132, combustion pipe 133, feeding pipe 14, fuel input assembly 2, feed hopper 21, feeding spiral 3, spiral plate 31, through groove 33, closing plate 331, output device 4, feed conveyor belt 5, cleaning assembly 6, return spring 61, cleaning ring 62, slider 621, cutting plate 622, cutting teeth 623, scraper rod 63, limiting part 631, cleaning part 632, scraper 64, cleaning groove 641, top plate 642, top rod 643, limiting hole 644. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1: As shown in the attached figure of the specification Figure 1-Figure 8 As shown, a furnace structure of a whole-bundle straw combustion gasification coupled combustion heating boiler comprises a furnace body 1, the side wall of the furnace body 1 is hollow and filled with heat preservation material, a smoke exhaust pipe 11 is arranged on the top of the furnace body 1, a fuel chamber is arranged inside the furnace body 1, a heating pipe 12 and a fuel input assembly 2 are arranged on the side wall of the furnace body 1, and the fuel input assembly 2 is used to continuously feed the whole bale of straw into the fuel chamber; The fuel input assembly 2 includes a feed hopper 21, which is communicated with the feed conveyor belt 5. The bottom of the feed hopper 21 is communicated with the feed chamber 13 arranged on the side wall of the furnace body 1. The bottom of the feed chamber 13 is communicated with the combustion chamber through a feed pipe 14, and the top and bottom openings of the feed chamber 13 are both provided with opening closing devices in existing boilers, which are controlled by an external controller; the feed pipe 14 is arranged at an angle, and a feeding screw 3 is arranged at the middle position inside the feed pipe 14, and the feeding screw 3 is connected to the output device 4 arranged inside the feed chamber 13. The output device 4 here is a motor device, which is controlled by an external controller to drive the feeding screw 3 to rotate, thereby pushing the straw material to move along the feed pipe 14; The inner wall of the feed chamber 13 is provided with a gasification heating device, which is a related device for heating the gasification chamber inside the heating boiler in the prior art, and the side wall of the feed chamber 13 is connected to the inside of the combustion chamber through the combustion pipe 133; The side wall of the feeding tube 14 is slidably provided with a plurality of cleaning components 6, and the cleaning components 6 are used to clean the inside of the feeding tube 14; the cleaning components 6 include a cleaning ring 62, and a slider 621 provided on the side wall of the cleaning ring 62 is slidably embedded in a slide groove provided on the inner wall of the feeding tube 14; the slider 621 is connected to the slide groove through a return spring 61; A scraper rod 63 is provided in the middle of the cleaning ring 62 , and the scraper rod 63 contacts the upper surface of the spiral plate 31 on the feeding spiral 3 . A through groove 32 is provided on the surface of the spiral plate 31 located on the upper side of the scraper rod 63 , and the width of the through groove 32 is greater than the diameter of the scraper rod 63 .

[0022] Specific work flow: As a kind of biomass fuel, straw has a low calorific value, burns quickly, has a lot of volatile matter, and produces a lot of smoke, which leads to an increase in pollutants. Discharging it easily leads to increased environmental pollution. Therefore, the present application provides a furnace structure of a whole-bundle straw combustion gasification coupled combustion heating boiler, which directly grabs the whole bundle of straw through the equipment and puts it on the feed conveyor belt 5 on one side of the feed hopper 21 without pre-processing and crushing. The continuously running feeding conveyor belt 5 feeds the bundled straw into the feeding hopper 21. The bottom of the feeding hopper 21 directly leads to the feeding chamber 13. After the straw is fed into the feeding chamber 13, the operation is continued until the feeding chamber 13 is filled with straw. At this time, the openings at the top and bottom of the feeding chamber 13 are closed, so that the feeding chamber 13 is in a closed state. Then, the gasification heating device is started to heat the straw accumulated in the feeding chamber 13. The straw is gradually carbonized to form semi-coke under the oxygen-deficient heating state, and volatilizes to produce a large amount of combustion flue gas during the heating process. The combustion flue gas here includes combustible components such as carbon monoxide. The inlet of the combustion pipe 133 can be opened to allow the combustion flue gas to enter the combustion chamber through the combustion pipe 133 and participate in the internal combustion reaction of the heating boiler. The semi-coke formed inside the feed chamber 13 is allowed to fall into the feed pipe 14 by opening the bottom outlet, and the feed screw inside the feed pipe 14 is rotated when the connected output device 4 is started, pushing the semi-coke to move along the feed pipe 14, and opening the connection between the feed pipe 14 and the inside of the combustion chamber, so that the semi-coke is fed into the combustion chamber to participate in the combustion reaction inside the combustion chamber; and the heat is transferred to the boiler water through the existing heat exchange components in the furnace body 1 structure, and high-temperature steam or hot water is output to realize heat supply to the outside; The present application saves the process of pre-crushing the straw by gasifying the whole bundle of straw in advance, so that the volatile components therein are separated in advance, and the carbonized semi-coke has high calorific value, small volume, long combustion time, and more complete combustion, and produces less impurities in the flue gas, so that the straw as a biomass fuel is fully utilized, and the consumption of resources such as coal is reduced, and the content of nitrogen and oxygen pollutants in the exhaust gas is also reduced, so as to achieve the purpose of energy saving and emission reduction; Furthermore, during the transportation process of the feeding pipe 14, the carbonized semi-coke material is easily broken to produce a large amount of powder, and is easily adhered to the feeding pipe 14 and the inner wall of the feeding spiral during the transportation process of the feeding pipe 14, resulting in poor transportation of the semi-coke material inside the feeding pipe 14, thereby affecting the normal operation of the straw participating in the heating boiler; therefore, the present application is provided with a cleaning component 6 to effectively clean the semi-coke material that may be adhered to the inner wall of the feeding pipe 14, causing it to fall off the inner wall of the feeding pipe 14, and then merge into the moving semi-coke material under the action of the feeding spiral 3, so as to realize the normal progress of the feeding process; Regarding the selection of the cleaning component 6 in the above embodiment, there are a variety of possible implementation schemes that can meet the above requirements and play a role in cleaning the inner wall of the feeding pipe 14 without affecting the normal feeding operation of the feeding screw 3, and all of them can be applied to the present application; A possible technical solution is provided here. The cleaning assembly 6 includes a cleaning ring 62. A slider 621 arranged on the side wall of the cleaning ring 62 slides into a slide groove arranged on the inner wall of the feeding tube 14. The slider 621 is connected to the slide groove through a reset spring 61. A scraper rod 63 is arranged in the middle part of the cleaning ring 62. The scraper rod 63 contacts the upper surface of the spiral plate 31 on the feeding spiral 3. A through groove 32 is arranged on the surface of the spiral plate 31 located on the upper side of the scraper rod 63. The width of the through groove 32 is greater than the diameter of the scraper rod 63. The cross section of the cleaning ring 62 is an isosceles triangle. The corresponding part of the vertex of the isosceles triangle, i.e., the middle part of the cleaning ring 62, protrudes toward the central axis of the feed pipe 14, and the corresponding parts of the bottom angles on the upper and lower sides, i.e., the acute angle ends on both sides of the cleaning ring 62, are in close contact with the inner wall of the feed pipe 14. Specifically, because the middle part of the cleaning ring 62 is convex upward, and the upper and lower sides of the convex part are arc inclined surfaces; thus, the semi-coke material flowing into the feeding pipe 14 will contact the inner ring surface of the cleaning ring 62 in the gap between the feeding screw 3 and the feeding pipe 14 when it flows upward along the feeding pipe 14 under the action of the feeding screw 3; on the one hand, the friction during the contact process causes the cleaning ring 62 to slide along the slide groove, and then it will slide and reset under the action of the connected reset spring 61, so as to realize the reciprocating sliding of the cleaning ring 62; at this time, the sharp ends on both sides of the cleaning ring 62 scrape the inner wall of the feeding pipe 14 located between the adjacent cleaning rings 62 during the sliding process, so that the semi-coke material adhering to the inner wall of the feeding pipe 14 is accelerated to fall off, and flows out smoothly under the action of the feeding screw 3; On the other hand, the cleaning ring 62 itself covers a portion of the inner wall surface of the feed pipe 14, reducing the area of ​​direct contact between the inner wall of the feed pipe 14 and the flowing semi-coke; after the semi-coke contacts the inner ring surface of the cleaning ring 62, it slides along the arc slope, reducing the adhesion of the semi-coke to the inner wall of the feed pipe 14, allowing the semi-coke to flow more smoothly inside the feed pipe 14; and the vibration effect of the reciprocating cleaning ring 62 itself also reduces the adhesion of the contacted semi-coke to the surface of the cleaning ring 62, ensuring that the cleaning ring 62 works normally while the semi-coke can flow normally inside the feed pipe 14, thereby improving the feeding efficiency.

[0023] Furthermore, the feeding screw 3 includes a central driving shaft and a spiral plate 31 arranged on the outer surface of the driving shaft, and the driving end extends into the outer side of the bottom of the feeding pipe 14 and is connected to the output device 4; A scraper rod 63 is provided in the middle of the cleaning ring 62, and the scraper rod 63 contacts the upper surface of the spiral plate 31; and a through groove 32 is provided at a portion of the upper surface of the spiral plate 31 located above the corresponding scraper rod 63, and the width of the through groove 32 is greater than the diameter of the scraper rod 63; the scraper rod 63 and the cleaning ring 62 are rotatably connected, and a torsion spring is provided at the rotatably connected portion; scrapers 64 are evenly provided on the outer surface of the scraper rod 63, and the scrapers 64 are distributed in an annular manner around the central axis of the cleaning ring 62; Specifically, because the upper surface of the spiral plate 31 constituting the feeding spiral 3 is a spiral surface, when the spiral plate 31 is driven by the driving shaft to rotate, the semi-coke material located inside the feeding pipe 14 will be pushed upward along with the rotating spiral surface; similarly, the scraper rod 63 originally located in the gap between the spiral plates 31 contacts the upper surface of the spiral plate 31 when the spiral plate 31 rotates, and slides along the upper surface of the spiral plate 31 under the action of the rotating spiral plate 31; at the same time, when the spiral surface on the upper side of the spiral plate 31 pushes the scraper rod 63 to move, it will also drive the cleaning ring 62 to slide upward along the extension track of the slide groove until the scraper rod 63 contacts the through groove 32 on the spiral plate 31, and the scraper rod 63 passes through the through groove 32 and then separates from the spiral plate 31, and resets and slides under the action of the reset spring 61 connected to the cleaning ring 62 until the scraper rod 63 contacts the spiral plate 31 on the lower side again, and the above movement is repeated; The cooperation between the scraper rod 63 and the spiral plate 31 ensures that the cleaning ring 62 can slide back and forth continuously and periodically in the gap area between the spiral plate 31 and the inner wall of the feeding pipe 14, thereby preventing the cleaning ring 62 from being blocked by the adhered semi-coke material, thereby preventing the cleaning ring 62 from sliding normally and being unable to play the role of cleaning the inner wall of the feeding pipe 14 normally. Furthermore, during the feeding process of the crushed semi-coke material, even if the cleaning ring 62 cannot slide due to the large friction, it can still slide back and forth normally through the cooperation between the cleaning ring 62 and the spiral plate 31. Furthermore, when the scraper rod 63 slides on the spiral plate 31, it impacts the semi-coke material accumulated on the upper surface of the spiral plate 31, causing the semi-coke material that may be tightly adhered to the upper surface of the spiral plate 31 to fall off; during the sliding process, when the scraper rod 63 encounters a large resistance, it can rotate relative to the cleaning ring 62, so that the scraper rod 63 can pass through the obstacle more smoothly and slide smoothly along the upper surface of the spiral plate 31. After passing the obstacle, the scraper rod 63 will resume rotation under the action of the connected torsion spring, and the violent rotation drives the scraper 64 to act on the surface of the spiral plate 31, while the semi-coke material adhered to the surface is thrown off by self-rotation, further playing a cleaning role on the spiral plate 31; and because the contact area between the end of the scraper 64 and the upper surface of the spiral plate 31 is small, the force is concentrated, which is conducive to increasing the relative friction with the surface of the spiral plate 31, and playing a more concentrated and effective cleaning role on the surface of the spiral plate 31; In this way, the normal transportation of the semi-coke material inside the feeding pipe 14 is effectively guaranteed, and the whole bundle of straw combustion gasification coupled combustion heating boiler can also operate normally.

[0024] Embodiment 2: On the basis of Example 1, a conveying bucket 131 is provided at the bottom of the feeding chamber 13, the top of the conveying bucket 131 is communicated with the inside of the feeding chamber 13, and the bottom is connected to the feeding pipe 14; the top of the conveying bucket 131 is rotatably connected to the bottom opening of the feeding chamber 13, and the bottom is rotatably connected to the side wall of the feeding pipe 14; a rotating device is provided on the side wall of the bottom outlet of the feeding chamber 13, and the rotating device is connected to the top of the conveying bucket 131 to drive the conveying bucket 131 to rotate. The inner wall of the conveying bucket 131 is evenly provided with crushing blades 132. The rotating device here can use a driving motor, which is indirectly rotatably connected to the top of the conveying bucket 131; specifically, an annular gear ring can be provided on the outer ring surface of the top of the conveying bucket 131, and a driving gear is provided at the output end of the rotating device, and the driving gear is meshed with the gear ring, so that starting the rotating device can drive the meshing conveying bucket 131 to rotate relative to the feeding pipe 14.

[0025] Specific work flow: On the basis of the specific work flow in Example 1, after the straw accumulated inside the feed chamber 13 is heated and carbonized to form semi-coke, the volatilized combustion flue gas is separated out, and the opening at the bottom of the feed chamber 13 that is connected to the top of the conveying bucket 131 is opened, and the semi-coke slides down along the conveying bucket 131. During this process, the rotating device is started to drive the conveying bucket 131 to rotate, and the centrifugal action causes the falling semi-coke to contact with the crushing blades 132 evenly arranged on the inner wall of the conveying bucket 131. Because the carbonized semi-coke becomes more brittle, the rotating crushing blades 132 can contact the semi-coke more smoothly than untreated straw, and smoothly flow into the feed pipe 14 connected to the bottom, and under the action of the feed spiral, flow into the combustion chamber along the feed pipe 14 to participate in the combustion and heating operation. The crushed and refined semi-coke contacts the flame in the combustion chamber more fully and burns more thoroughly, while increasing more heat, reducing ash impurities in the flue gas, which is more in line with the theme of energy conservation and emission reduction.

[0026] Embodiment three: On the basis of the second embodiment, a cleaning groove 641 is provided in the middle part of the end of the scraper 64, and a top plate 642 is slidably provided inside the cleaning groove 641. The top plate 642 is connected to the inner wall of the cleaning groove 641 by a spring, and the end of the top plate 642 extending out of the cleaning groove 641 is sharp; a top rod 643 is provided on the inner wall of the cleaning groove 641, and the end of the top rod 643 is embedded in a limiting hole 644 provided at a corresponding position on the top plate 642, and the top rod 643 and the limiting hole 644 are slidably connected; the limiting hole 644 is a through hole, and the end of the top rod 643 passes through the limiting hole 644 and extends to the outside, and the end of the top rod 643 is sharp; and the end of the top rod 643 is elastic, and the sharp end of the top plate 642 is also elastic, so as to reduce the wear on the surface of the spiral plate 31 during the impact process.

[0027] Specific working process: On the basis of the specific working process in the second embodiment, the top plate 642 on the scraper 64 serves as a part of the end of the scraper 64. When the scraper rod 63 contacts the surface of the spiral plate 31, when the scraper 64 scrapes and hits the upper surface of the spiral plate 31, the top plate 642 located on the end of the scraper 64 acts on the upper surface of the spiral plate 31 to clean the spiral plate 31. When the end of the top plate 642 contacts the upper surface of the spiral plate 31 and is subject to greater pressure resistance, the top plate 642 will retract inward along the cleaning groove 641 under pressure. , the spring connected to the bottom of the top plate 642 is compressed and deformed, and in this process, the impact between the scraper 64 and the spiral plate 31 is partially converted into the elastic potential energy of the spring, thereby alleviating the impact on the surface of the spiral plate 31 and reducing the damage to the scraper 64 and the spiral plate 31 during the impact process; and when the top plate 642 slides along the cleaning groove 641, the powdery semi-coke material adhered to the surface of the top plate 642 will also fall off due to the scraping generated during the sliding process, thereby reducing the powdery semi-coke material adhered to the scraper 64 and ensuring the normal operation of the scraping rod 63; Furthermore, during the downward movement of the top plate 642 under pressure, the top rod 643 slides relatively along the limiting hole 644, so that the sliding of the top plate 642 is limited. At the same time, the end of the top rod 643 further protrudes from the end of the top plate 642, impacting the powdered semi-coke material adhered to the end of the top plate 642, accelerating the falling of impurities adhered to the end of the top plate 642; and the end of the top rod 643 is sharp, so that when the end of the top rod 643 rotates with the scraper rod 63, the end of the top rod 643 produces concentrated spurs on the upper surface of the spiral plate 31. While cleaning the impurities adhered to the upper surface of the spiral plate 31, the impact of the end of the top rod 643 will also accelerate the fragmentation of larger block semi-coke materials in the semi-coke material on the spiral plate 31, so that the semi-coke material is further refined during the feeding process, which is beneficial for the semi-coke material to enter the combustion chamber and burn more fully in the later stage.

[0028] Embodiment 4: On the basis of the third embodiment, the scraper rod 63 includes a limiting portion 631 and a cleaning portion 632. The connecting portion between the limiting portion 631 and the cleaning portion 632 is a hollow structure and is made of elastic metal material. The elastic metal material here can be spring steel. The limiting portion 631 is connected to the cleaning ring 62, and the scraper 64 is located on the outer surface of the cleaning portion 632. A vibration device can be provided inside the cleaning portion 632 as needed. The vibration device here can use a miniature vibration motor, and the vibration device is controlled by an external controller.

[0029] Specific working process: Based on the specific working process in the third embodiment, as the spiral plate 31 rotates, the scraper rod 63 slides upward along the spiral plate 31. During this process, the force on the reset spring 61 connected to the cleaning ring 62 increases, and the deformation amplitude increases, so that the reset tendency of the scraper rod 63 is enhanced. The pressure between the scraper rod 63 and the spiral plate 31 increases with the movement of the scraper rod 63. At this time, the bending stress on the connection part between the scraper rod 63 and the cleaning ring 62 increases, which may affect the connection stability; Therefore, the scraper rod 63 is set to a segmented structure, so that the cleaning portion 632 that plays a cleaning role and the limiting portion 631 that plays a connecting relationship are made of elastic material to achieve elastic connection; in this way, when the contact pressure between the cleaning portion 632 and the spiral plate 31 increases, the connecting portion between the limiting portion 631 and the cleaning portion 632 is elastically deformed, and the cleaning portion 632 is slightly bent relative to the limiting portion 631, thereby buffering the pressure effect transmitted to the limiting portion 631 and reducing the force at the connecting portion between the limiting portion 631 and the cleaning ring 62, thereby ensuring the connection stability of the scraper rod 63; Furthermore, when a large amount of powdered semi-coke material adheres to the surface of the cleaning portion 632 on the scraper rod 63, affecting its normal operation, the vibration device located inside the cleaning portion 632 can be activated through an external controller to allow the cleaning portion 632 to vibrate at a high frequency and a small amplitude relative to the limiting portion 631, thereby improving the cleaning effect on the surface of the contacting spiral plate 31 and accelerating the shedding of the powdered semi-coke material adhered to the surface of the cleaning portion 632 to ensure its normal functioning.

[0030] Embodiment five: On the basis of Example 4, cutting plates 622 are evenly arranged on the inner ring surface of the cleaning ring 62, the cutting plate 622 is close to the end of the cleaning ring 62, and the sharp end of the cutting plate 622 points to the end of the cleaning ring 62; cutting teeth 623 are evenly arranged on one side of the cutting plate 622 close to the central axis of the feeding tube 14, and the evenly distributed cutting teeth 623 are a serrated structure, and the cutting plate 622 and the cutting teeth 623 are both located in the gap area between the edge end of the spiral plate 31 and the feeding tube 14, and will not collide with the edge end of the spiral plate 31 during movement.

[0031] Specific working process: Based on the specific working process in the fourth embodiment, as the cleaning ring 62 slides back and forth, the ends of the cleaning ring 62 on both sides scrape the inner wall of the feeding tube 14, so that the powdered semi-coke material adhering to the inner wall of the feeding tube 14 is scooped up and slides in contact with the inner ring surface of the cleaning ring 62, and then contacts with the cutting plate 622 pointing to the end of the cleaning ring 62, and is impacted by the end of the contact plate, so that the shoveled agglomerated powdered semi-coke material is broken up by the cutting plate 622, and is further refined and gathered into the flowing powdered semi-coke material, so that the feeding process is smoother; Furthermore, when large pieces of the flowing powdered semi-coke come into contact with the inner wall of the feed pipe 14 during the flow, they will come into contact with the cutting plate 622 and the cutting teeth 623 on the cutting plate 622, so that the large pieces of powdered semi-coke are cut and broken into smaller pieces during the contact process, thereby reducing the problem of large pieces of powdered semi-coke being easily stuck during the flow process, and making the feeding process go more smoothly; and the refined powdered semi-coke increases the contact surface when entering the combustion chamber of the furnace body 1, thereby improving the combustion efficiency and thereby improving the heating efficiency of the heating boiler.

[0032] Embodiment six: On the basis of the fifth embodiment, the part of the through groove 32 inside the feeding pipe 14 away from the combustion chamber can be symmetrically provided with closing plates 331 on the inner walls on both sides. The through groove 32 close to the combustion chamber can cancel the setting of the closing plate 331 in consideration of the higher temperature, so as to avoid damage to the close closing plates 331 caused by high temperature; the ends of the symmetrical closing plates 331 are close to and in contact with each other, and the closing plates 331 are close to the upper surface of the spiral plate 31. The closing plates 331 are made of elastic material, and an elastic high-temperature-resistant and wear-resistant rubber material can be selected here.

[0033] Specific working process: On the basis of the specific working process in Example 5, the closing piece 331 arranged on the inner wall of the groove 32 plays a shielding role for the through groove 32. When the spiral plate 31 rotates to drive the semi-coke material to flow along the upper surface of the spiral plate 31, the semi-coke material contacts the upper surface of the closing piece 331 when passing through the through groove 32. The closing piece 331 supports the semi-coke material so that it passes smoothly, ensuring the smooth progress of the feeding process, and also reducing the situation where the powdered semi-coke material enters the through groove 32 and adheres to the inner wall of the through groove 32, ensuring the smooth passage of the through groove 32; when the scraper rod 63 slides to the through groove 32 position, at this time, due to the action of the reset spring 61, the pressure between the scraper rod 63 and the surface of the spiral plate 31 is relatively large, and the scraper rod 63 squeezes the closing piece 331 to make it bend, deform and open, so that the scraper rod 63 can smoothly pass through the closing piece 331, and then the closing piece 331 is elastically reset to function normally.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A furnace structure of a whole-bundle straw combustion gasification coupled combustion heating boiler, comprising a furnace body (1), the side wall of the furnace body (1) is hollow and filled with heat-insulating material, a smoke exhaust pipe (11) is arranged on the top of the furnace body (1), a fuel chamber is arranged inside the furnace body (1), a heating pipe (12) and a fuel input assembly (2) are arranged on the side wall of the furnace body (1), and the fuel input assembly (2) is used to continuously feed a whole bale of straw into the fuel chamber; Features: The fuel input assembly (2) comprises a feed hopper (21), the feed hopper (21) is connected to a feed conveyor belt (5), the bottom of the feed hopper (21) is connected to a feed chamber (13) arranged on a side wall of the furnace body (1), and the bottom of the feed chamber (13) is connected to a combustion chamber via a feed pipe (14); the feed pipe (14) is arranged at an angle, and a feeding screw (3) is arranged at a middle position inside the feed pipe (14), and the feeding screw (3) is connected to an output device (4) arranged inside the feed chamber (13); The side wall of the feeding tube (14) is slidably provided with a plurality of cleaning components (6), and the cleaning components (6) are used to clean the inside of the feeding tube (14); the cleaning components (6) include a cleaning ring (62), and a slider (621) provided on the side wall of the cleaning ring (62) is slidably embedded in a slide groove provided on the inner wall of the feeding tube (14); the slider (621) is connected to the slide groove via a return spring (61); A scraper rod (63) is arranged in the middle of the cleaning ring (62), and the scraper rod (63) contacts the upper surface of the spiral plate (31) on the feeding spiral (3). A through groove (32) is arranged on the surface of the spiral plate (31) at the upper side of the scraper rod (63), and the width of the through groove (32) is greater than the diameter of the scraper rod (63).

2. The furnace structure of the whole-bundle straw combustion gasification coupled combustion heating boiler according to claim 1 is characterized in that: The inner wall of the feed chamber (13) is provided with a gasification heating device, and the side wall of the feed chamber (13) is connected to the interior of the combustion chamber through a combustion pipe (133); A conveying hopper (131) is provided at the bottom of the feeding chamber (13); the top of the conveying hopper (131) is communicated with the interior of the feeding chamber (13), and the bottom is connected to the feeding pipe (14).

3. The furnace structure of the whole-bundle straw combustion gasification coupled combustion heating boiler according to claim 2 is characterized in that: The top of the conveying bucket (131) is rotatably connected to the bottom opening of the feeding chamber (13), and the bottom is rotatably connected to the side wall of the feeding pipe (14); a rotating device is provided on the side wall of the bottom outlet of the feeding chamber (13), and the rotating device is connected to the top of the conveying bucket (131) to drive the conveying bucket (131) to rotate, and the inner wall of the conveying bucket (131) is evenly provided with crushing blades (132).

4. The furnace structure of the whole-bundle straw combustion gasification coupled combustion heating boiler according to claim 1 is characterized in that: The cross section of the cleaning ring (62) is an isosceles triangle, and the middle portion of the cleaning ring (62) protrudes toward the central axis of the feeding pipe (14), and the two side ends of the cleaning ring (62) are in close contact with the inner wall of the feeding pipe (14).

5. The furnace structure of the whole-bundle straw combustion gasification coupled combustion heating boiler according to claim 4 is characterized in that: The scraper rod (63) and the cleaning ring (62) are rotatably connected, and a torsion spring is arranged at the rotatably connected portion; scrapers (64) are evenly arranged on the outer surface of the scraper rod (63), and the scrapers (64) are distributed in an annular shape around the central axis of the cleaning ring (62); A cleaning groove (641) is arranged in the middle of the end of the scraper (64), a top plate (642) is slidably arranged inside the cleaning groove (641), the top plate (642) is connected to the inner wall of the cleaning groove (641) via a spring, and the end of the top plate (642) extending out of the cleaning groove (641) is sharp.

6. The furnace structure of the whole-bundle straw combustion gasification coupled combustion heating boiler according to claim 5 is characterized in that: A push rod (643) is provided on the inner wall of the cleaning groove (641), and the end of the push rod (643) is embedded in a limiting hole (644) provided at a corresponding position on the top plate (642), and the push rod (643) and the limiting hole (644) are slidably connected; The limiting hole (644) is a through hole, and the end of the push rod (643) passes through the limiting hole (644) and extends to the outside, and the end of the push rod (643) is sharp.

7. The furnace structure of the whole-bundle straw combustion gasification coupled combustion heating boiler according to claim 6 is characterized in that: The scraping rod (63) comprises a limiting portion (631) and a cleaning portion (632), and the connection portion between the limiting portion (631) and the cleaning portion (632) is made of elastic metal material; The limiting portion (631) is connected to the cleaning ring (62), the scraper (64) is located on the outer surface of the cleaning portion (632), and a vibration device is provided inside the cleaning portion (632), and the vibration device is controlled by an external controller.

8. The furnace structure of the whole-bundle straw combustion gasification coupled combustion heating boiler according to claim 7 is characterized in that: Cutting plates (622) are evenly arranged on the inner surface of the cleaning ring (62). The cutting plates (622) are close to the end of the cleaning ring (62), and the sharp end of the cutting plates (622) points to the end of the cleaning ring (62).

9. The furnace structure of the whole-bundle straw combustion gasification coupled combustion heating boiler according to claim 8, characterized in that: Cutting teeth (623) are evenly arranged on one side of the cutting plate (622) close to the central axis of the feeding tube (14), and the evenly distributed cutting teeth (623) are in a sawtooth structure.

10. The furnace structure of the whole-bundle straw combustion gasification coupled combustion heating boiler according to claim 9, characterized in that: Closing sheets (331) are symmetrically arranged on the inner walls of both sides of the through groove (32), the ends of the symmetrical closing sheets (331) are close to and in contact with each other, and the closing sheets (331) are close to the upper surface of the spiral plate (31); the closing sheets (331) are made of elastic material.

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