Reciprocating feeding assembly and combustion equipment based thereon

Abstract

This invention provides a reciprocating feeding assembly and a combustion device based thereon, including a feeding section, a feeding section, and a pushing mechanism; the feeding section has a feeding outlet, and the feeding section reciprocates on the feeding section towards the feeding outlet; the pushing mechanism is flexibly connected to the feeding section, pushing the feeding section to slide. It includes a furnace shell, on which are provided a feeding port, an air inlet, and a flue gas and ash outlet; the furnace shell contains a multi-stage reciprocating feeding assembly with a stepped structure. This invention, by flexibly connecting the pushing mechanism and the feeding section, achieves multiple degrees of freedom in the feeding section, allowing the feeding section to deviate to a certain extent during reciprocating motion due to load and material jamming, thereby avoiding shearing forces on the push rod and providing a large tolerance for the entire feeding mechanism, preventing it from jamming due to foreign objects entering.

Description

Technical Field

[0001] This invention relates to the field of stepped pre-combustion furnace technology, and in particular to a reciprocating feeding assembly and combustion equipment based thereon. Background Technology

[0002] Cement production is an energy-intensive and carbon-emitting industry, accounting for approximately 13.5% of the nation's total carbon emissions. Alternative fuel technologies that use combustible waste to replace fossil fuels are one of the main ways for the cement industry to reduce carbon emissions. However, combustible waste comes from a wide range of sources and has diverse physicochemical properties, posing significant challenges to standardized pretreatment and limiting the scale of alternative fuel application in my country's cement industry.

[0003] The pre-combustion equipment is an additional reaction unit added outside the kiln system. Combustible waste is dried, pyrolyzed, and burned in the pre-combustion equipment. The heat and ash generated are used in cement production, thereby reducing the impact of directly feeding high-moisture-content and large-sized combustible waste into the cement kiln decomposition furnace and greatly reducing the requirements for front-end pretreatment.

[0004] Existing stepped pre-combustion furnaces mostly use air-assisted flow to transport combustion residues inside the furnace. However, this method has the disadvantage of easily causing fuel accumulation when handling large or viscous materials, as illustrated by Chinese patent CN217154175U published on April 29, 2022.

[0005] There is also, for example, Chinese patent CN214933294U published on 2021-11-30, which describes a feeding mechanism and a stepped feeding device. The technical solution is to push fuel in a stepped manner through the reciprocating movement of the carrying plate and the feeding plate. However, its driving method is to achieve reciprocating motion by gear and rack cooperation, and its allowable meshing clearance is within a very small range. In actual working conditions, foreign objects can easily and inevitably enter the feeding mechanism, which will increase the meshing clearance of the gear teeth and cause the mechanism to fail. Summary of the Invention

[0006] The purpose of this invention is to provide a reciprocating feeding assembly and a combustion device based thereon, which can prevent the feeding mechanism from jamming due to the entry of foreign objects;

[0007] The present invention provides a reciprocating feeding assembly, including a feeding section, a feeding section, and a pushing mechanism; the feeding section has a feeding outlet, and the feeding section reciprocates on the feeding section toward the feeding outlet; the pushing mechanism is flexibly connected to the feeding section and pushes the feeding section to slide.

[0008] Furthermore, the material-carrying part includes a support block, an end block, and a guide block. The material-pushing part slides on the support block. The end block is installed on the side of the support block away from the material-pushing outlet, and the guide block is installed on both sides of the support block.

[0009] Furthermore, the material loading section also includes limiting blocks, which are installed on both sides of the support block near the material pushing outlet, and guide blocks are installed on both sides of the support block away from the material pushing outlet. The side surfaces of the limiting blocks and the guide blocks are in staggered contact through concave and convex interfaces, and the bottom surfaces of the limiting blocks and the support block are in staggered contact through concave and convex interfaces. The two limiting blocks can be relatively far apart or close together.

[0010] Furthermore, the material-carrying part also includes a fixing plate, which covers both sides of the support block. Connectors are pre-embedded on the outer sides of the support block, the guide block, and the limiting block, and the connectors extend out of the fixing plate.

[0011] Furthermore, the pushing part includes a pushing block, which slides along a groove formed by the support block, the guide block, and the limiting block.

[0012] Furthermore, the support block is provided with a cleaning groove that runs through both sides, the bottom surface of the push block is provided with an inward concave surface, and the fixing plate is provided with a cleaning port corresponding to the cleaning groove.

[0013] Furthermore, the pushing mechanism includes a push rod and a driving device, one end of the push rod passing through the end block and flexibly connected to the push block, and the other end of the push rod being connected to the driving device.

[0014] The present invention also provides a combustion device including a reciprocating feeding assembly, comprising a furnace shell, wherein the furnace shell is provided with a feeding port, an air inlet and a flue gas ash outlet; the furnace shell is provided with a multi-stage reciprocating feeding assembly in a stepped structure.

[0015] Furthermore, the connecting piece of the limiting block is movably connected to the fixing plate and the furnace shell, and the connecting piece of the limiting block extends out of the side wall of the furnace shell and is connected to the compression spring.

[0016] Furthermore, the furnace shell is provided with an ash removal port at the position corresponding to the cleaning port.

[0017] The technical solution of the present invention achieves multiple degrees of freedom in the pushing part by flexibly connecting the pushing mechanism and the pushing part. This allows the pushing part to deviate to a certain extent due to load and jamming during reciprocating motion, thereby avoiding shearing force on the push rod and giving the entire pushing mechanism a large fault tolerance space so that it will not be jammed due to foreign objects entering. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the reciprocating feeding assembly structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the flexible connection between the pusher and the driving mechanism of the present invention;

[0021] Figure 3 For the present invention Figure 2 Enlarged view of point A;

[0022] Figure 4 This is a schematic diagram of the front side of the reciprocating feeding assembly of the present invention;

[0023] Figure 5 This is a top view of the reciprocating feeding assembly of the present invention;

[0024] Figure 6 For the present invention Figure 5 BB section view;

[0025] Figure 7 For the present invention Figure 5 CC section view;

[0026] Figure 8 This is a schematic diagram of the stepped multi-stage reciprocating feeding assembly of the present invention;

[0027] Figure 9 This is a schematic diagram of the combustion device structure of the present invention;

[0028] Explanation of reference numerals in the attached figures:

[0029] 1-Carrying section, 101-Support block, 102-End block, 103-Guide block, 104-Limiting block, 105-Fixing plate, 106-Cleaning groove, 107-Cleaning port, 108-Insulation material, 109-Wear-resistant material, 2-Pushing section, 201-Push block, 202-Concave surface, 3-Pushing mechanism, 301-Push rod, 302-Drive device, 4-Pushing outlet, 5-Concave-convex interface, 6-Connector, 7-Furnace shell, 8-Feeding port, 9-Air inlet, 10-Flue gas ash outlet, 11-Cold raw material inlet, 12-Hot raw material inlet, 13-Cleaning port, 14-Compression spring, 15-Insulation layer, 16-Step structure multi-stage reciprocating pushing assembly; Detailed Implementation

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Example 1

[0034] like Figures 1-8 As shown, the present invention provides a reciprocating pusher assembly, including a loading section 1, a pusher section 2 and a pushing mechanism 3; the loading section 1 has a pusher outlet 4, and the pusher section 2 slides reciprocally on the loading section 1 toward the pusher outlet 4; the pushing mechanism 3 is flexibly connected to the pusher section 2 and pushes the pusher section 2 to slide.

[0035] Specifically, the material-carrying section 1 is larger than the material-pushing section 2. Initially, the material-pushing section 2 is located on one side of the material-carrying section 1, so that the other side of the material-carrying section 1 is exposed. Thus, after the material falls, it falls onto the exposed position on the material-carrying section 1. When the material-pushing section 2 moves on the material-carrying section 1, it pushes the material on the material-pushing section 2 toward the direction of the material-pushing outlet 4 until it is pushed out from the material-pushing outlet 4, so that the material falls onto the next level material-carrying section 1.

[0036] The pushing mechanism 3 is used to move the pushing part 2. The pushing mechanism 3 is flexibly connected to the pushing part 2, which mainly allows the pushing part 2 to have at least three degrees of freedom in its movement. When foreign objects or dust accumulate between the pushing part 2 and the loading part 1, the pushing part 2 will deflect to a certain extent, thereby preventing the push rod 301 from being damaged by shearing force. After one pushing operation is completed, the pushing part 2 retracts, exposing the foreign object, and then pushes the loading part 1 again in the next pushing operation; or when the foreign object cannot be exposed on its own, it can be cleaned by setting the cleaning port 107.

[0037] The flexible connection between the pusher 2 and the push mechanism 3 can be achieved in various ways, such as a universal joint connection, a ball joint connection, etc. Figure 3 As shown, in the universal joint, two connecting heads are respectively connected to two connecting plates on both sides. The rotating column of the cross structure is inserted into and rotated with the two connecting plates and can be slidably connected, so that the push rod 301 can push the push block 201, but the push block 201 can also be slightly offset from the push rod 301 in the left and right and up and down, so as to achieve a flexible connection.

[0038] Example 2

[0039] like Figures 1-7 As shown, the material loading section 1 includes a support block 101, an end block 102, and a guide block 103. The pushing section 2 slides on the support block 101. The end block 102 is installed on the side of the support block 101 away from the pushing outlet 4, and the guide block 103 is installed on both sides of the support block 101. The material loading section 1 also includes a limiting block 104. The limiting block 104 is installed on both sides of the support block 101 near the pushing outlet 4, and the guide block 103 is installed on both sides of the support block 101 away from the pushing outlet 4. The side surface of the limiting block 104 and the guide block 103 are in staggered contact through a concave-convex interface 5, and the bottom surface of the limiting block 104 is in staggered contact with the support block 101 through a concave-convex interface 5. The two limiting blocks 104 can be relatively far apart or close together. The material loading section 1 also includes a fixing plate 105, which covers both sides of the support block 101. Connectors 6 are pre-embedded on the outer sides of the support block 101, the guide block 103 and the limiting block 104, and the connectors 6 extend out of the fixing plate 105.

[0040] Specifically, the material loading section 1 is a U-shaped chute structure, and the material pushing section 2 is a pusher block 201 that fits the shape inside the material loading section 1. The material loading section 1 is used to place the pusher block 201 and make the pusher block 201 move back and forth in a directional manner to push the material. The material loading section 1 is specifically composed of a support block 101 forming the bottom, guide blocks 103 on both sides forming the guide sidewalls, an end cap forming the closed opening, and the other side being open to form the material pushing outlet 4.

[0041] The fixing plate 105 is a steel plate (carbon steel, stainless steel or heat-resistant steel) with holes. It is reinforced to prevent deformation. The holes are used to allow the high-heat connectors 6 (studs) on the support block 101, limit block 104, guide block 103 and end block 102 to pass through and be fixed, so that the components are connected into a whole through the fixing plate 105.

[0042] The limiting block 104 and the guide block 103 are arranged in the same direction and are both connected to the furnace shell 7 through the high-heat connector 6 (stud) through the fixing plate 105. The difference lies in that the stud of the guide block 103 is fixedly connected to the furnace shell 7 (through a nut); while the stud of the limiting block 104 is movably connected to the furnace shell 7. Specifically, a limiting spring 14 is set on the outer wall of the furnace shell 7 at the position corresponding to the stud of the limiting block 104. The stud of the limiting block 104 is connected to the spring 14. Due to the elastic force of the spring 14, the limiting block 104 will press against the push block 201, so that the end face of the limiting block 104 is tightly fitted with the left and right sides of the push block 201 to prevent foreign objects from entering. When foreign objects enter, the spring 14 is forced to be compressed, which increases the gap between the limiting block 104 and the push block 201 to prevent the push block 201 from being jammed. As the push block 201 moves, the foreign objects also move until they are discharged. Then, the elastic force of the spring 14 pushes the limiting block 104 to reset, that is, the left and right limiting blocks 104 can move away from or close to each other.

[0043] like Figure 5 and Figure 6 As shown, the compensation structure consists of a compression spring 14, a spring sleeve, a sleeve base, an external threaded nut for adjusting the preload of the compression spring 14, and a connecting piece that transmits the spring force to the limiting block. Its function is to ensure that the working surface of the limiting block fits tightly against the side of the push block during operation. A very small gap prevents foreign objects from entering. When a foreign object enters, the limiting block retracts to prevent jamming. After the foreign object is expelled, the compression spring 14 pushes the limiting block back to its original position. This design improves the reliability of the pushing assembly.

[0044] The upper surface of the support block 101 has two upwardly convex stepped surfaces on its outer sides, and the lower surface of the limiting block 104 has a downwardly convex stepped surface on its inner side. When the limiting block 104 slides along the support block 101, the two stepped surfaces form an alternating concave-convex interface 5, limiting the maximum distance between the two limiting blocks 104. Similarly, the surfaces of the two guide blocks 103 facing the push outlet 4 have inner convex stepped surfaces, and the surfaces of the two limiting blocks 104 facing away from the push outlet 4 have outer convex stepped surfaces. When the limiting block 104 slides along the guide block 103, the two stepped surfaces form an alternating concave-convex interface 5, limiting the minimum distance between the two limiting blocks 104. Furthermore, the alternating concave-convex interface 5 structure also prevents high-temperature gas from escaping through the gaps.

[0045] The support block 101, push block 201, end block 102, left and right guide blocks 103, and left and right limiting blocks 104 are prefabricated components cast from refractory materials and dried to remove internal moisture before use. Each prefabricated component has a steel frame inside to improve its load-bearing capacity. High-heat resistant connectors 6 (studs) are embedded in the end faces of each component that connect to the fixing plate 105, and the studs are connected to the steel frame. The studs extend out of the end faces of the prefabricated components for connection with the fixing plate 105. Insulation material 108 (aerogel, calcium silicate board, fiber felt, etc.) is filled in the gaps to prevent flames or high-temperature gases from escaping and eroding the furnace wall. All replaceable pusher components are prefabricated in the factory. Each prefabricated component can be cast from refractory materials or welded from metal plates, and air is circulated within the cavity for cooling.

[0046] The support block 101 and the end block 102 are respectively fixed to the left and right fixing plates 105 on both sides, forming a stable base. The connection method can be positioning with nuts on both sides or welding. A gap of 10-100mm is left between the fixing plate 105 and the prefabricated component to fill the heat insulation material 108 (the size of the gap is related to the thermal conductivity of the selected heat insulation material 108). The left and right guide blocks 103 are respectively fixed to the left and right fixing plates 105, and the connection method is the same as above.

[0047] The friction surfaces of each prefabricated component are inlaid with high-temperature wear-resistant material 109 (such as ceramics) to improve service life.

[0048] Example 3

[0049] like Figures 1-7 As shown, the pushing part 2 includes a pushing block 201, which slides along a groove formed by a support block 101, a guide block 103, and a limiting block 104. The support block 101 has a cleaning groove 106 extending through both sides, and the bottom surface of the pushing block 201 has an inwardly concave surface 202. A cleaning port 107 is provided on the fixing plate 105 corresponding to the cleaning groove 106. The pushing mechanism 3 includes a pushing rod 301 and a driving device 302. One end of the pushing rod 301 passes through the end block 102 and is flexibly connected to the pushing block 201, while the other end of the pushing rod 301 is connected to the driving device 302.

[0050] Specifically, the push block 201 is located between two guide blocks 103. A connecting plate is pre-embedded at the tail of the push block 201. The connecting plate and the connecting rod adopt a multi-degree-of-freedom joint. The number of connecting rods is more than one (preferably two). The connecting rod passes through the end block 102 and the hole on the outer wall of the combustion chamber and is connected to the external transmission device (mechanical or hydraulic), so that the push block 201 can reciprocate back and forth between the two guide blocks 103.

[0051] The rear of the push block 201 and the end block 102 form a sealed chamber. To balance the negative pressure generated by the forward movement of the push block 201, the connecting rod / push rod 301 has a through hole in the center, which is connected to the atmosphere via a check valve or allows compressed air to be introduced. This balances the pressure and cools the connecting rod.

[0052] The upper surface of the support block 101 is provided with at least two through-hole cleaning grooves 106, one of which is located below the moving path of the push block 201, and the other is located at the end of the support block 101 away from the push outlet 4. When the push block 201 pushes forward, if foreign objects or dust get stuck at the bottom of the push block 201, due to the flexible connection structure between the push rod 301 and the push block 201, the push block 201 will deflect at a certain angle so that the front end passes over the foreign objects or dust. After the foreign objects enter the gap between the push block 201 and the support block 101, they are scraped into the two grooves containing foreign objects by the rearward-moving push block 201. When the push block 201 retracts, due to the structure of the bottom surface of the push block 201 facing the concave surface 202, the concave surface 202 of the push block 201 forms a scraping groove, which carries the foreign objects or dust to the cleaning groove 106 and finally sends them to the cleaning groove 106 to fall and accumulate. The two ends of the cleaning groove 106 correspond to the ash removal ports 13 on the furnace wall, and the ash removal ports 13 can be opened periodically to remove foreign objects.

[0053] Example 4

[0054] like Figures 1-9 As shown, the present invention also provides a combustion device including a reciprocating feeding assembly, comprising a furnace shell 7, wherein the furnace shell 7 is provided with a feeding port 8, an air inlet 9, and a flue gas ash outlet 10; the furnace shell 7 is provided with a multi-stage reciprocating feeding assembly 16 in a stepped structure. The connecting member 6 of the limiting block 104 is movably connected to the fixing plate 105 and the furnace shell 7, and the connecting member 6 of the limiting block 104 extends out of the side wall of the furnace shell 7 and is connected to the compression spring 14. The furnace shell 7 is provided with an ash removal port 13 at a position corresponding to the cleaning port 107.

[0055] Specifically, the furnace shell 7 is equipped with a cold raw material inlet 11 and a hot raw material inlet 12. An air inlet 9 is used to connect tertiary air. After the alternative fuel enters through the feeding port 8, under the spreading effect of the tertiary air (high-temperature air from the grate cooler, around 950℃, used as combustion air in the decomposition furnace in cement production) at the air inlet 9, some fine particles are carried into the decomposition furnace by the airflow, while larger materials fall onto the moving hearth. The control system automatically controls the stroke and time interval of the hearth's reciprocating motion based on the material characteristics and combustion conditions, thereby controlling the residence time of combustibles in the furnace and the positional distribution of each combustion stage within the device. Simultaneously with the addition of alternative fuel, a stream of hot raw material is drawn from the preheater's discharge port into the pre-combustion furnace, allowing the heat released by the fuel to be immediately absorbed by the decomposition of calcium carbonate. By adjusting the amount of hot raw material added, the operating temperature inside the pre-combustion furnace is controlled between 850-950℃. In this way, almost all the heat from the alternative fuel can be effectively utilized in cement production.

[0056] The pusher components are arranged in a stepped manner inside the furnace, with each pusher component partially overlapping the previous one. The front of the pusher block 201 faces the high-temperature combustion zone of the combustion chamber. The connecting rod / push rod 301 at the rear of the pusher block 201 connects to the transmission mechanism outside the furnace. The connecting rod / push rod 301 has a sealing device at 7 points where it passes through the furnace shell. Driven by the transmission mechanism with position feedback, the pusher block 201 reciprocates back and forth (the movement speed, interval, and stroke can all be adjusted by the control system). When the pusher block 201 moves forward, it pushes the combustible material on the support block 101 to the next step. When the pusher block 201 moves backward, the support block 101 of the previous pusher component can scrape off the combustible material that falls on the surface of the pusher block 201.

[0057] The feeding assembly is arranged at an angle to prevent liquid material from flowing into the rear chamber.

[0058] The pusher assembly is horizontally pushed into the furnace through the pre-reserved opening 7 on the furnace shell and installed and fixed. The pre-reserved opening is sealed by a metal cover plate with a sealing gasket. The pre-reserved openings are arranged alternately on the left and right, and the pusher assembly is installed alternately on the left and right.

[0059] There is a heat insulation layer 15 between the pusher assembly and the furnace shell 7. The two ends of the pusher assembly have a gap of 10-100mm between them and the furnace wall, and are filled with compressible heat insulation material 108 to compensate for the deformation caused by temperature.

[0060] The working method and principle of this device:

[0061] The pusher assembly is arranged in a stepped manner inside the furnace. The front of the pusher block 201 faces the high-temperature combustion zone of the combustion chamber, and the connecting rod at the rear of the pusher block 201 connects to the transmission mechanism outside the furnace. The connecting rod / pusher 301 has a sealing device at the point where it passes through the furnace shell 7. Driven by the transmission mechanism with position feedback, the pusher block 201 reciprocates back and forth (the movement speed, interval, and stroke can all be adjusted by the control system). When the pusher block 201 moves forward, it pushes the combustible material on the support block 101 to the next step. When the pusher block 201 moves backward, the support block 101 of the previous pusher assembly can scrape off the combustible material that falls on the surface of the pusher block 201.

[0062] After the alternative fuel enters through inlet 8, under the influence of tertiary air (high-temperature air from the grate cooler, around 950℃, used as combustion air in the decomposition furnace during cement production), some fine particles are carried into the decomposition furnace by the airflow, while larger materials fall onto the moving hearth. The control system automatically controls the stroke and time interval of the hearth's reciprocating motion based on material characteristics and combustion conditions (monitored by high-temperature cameras, temperature sensors, and pressure sensors), thereby controlling the residence time of combustibles within the furnace and the positional distribution of each combustion stage within the device. Simultaneously with the addition of the alternative fuel, a stream of hot raw material is introduced from the preheater outlet into the pre-combustion furnace, allowing the heat released from fuel combustion to be immediately absorbed by the decomposition of calcium carbonate. By adjusting the amount of hot raw material added, the operating temperature within the pre-combustion furnace is controlled between 850-950℃. In this way, almost all the heat from the alternative fuel can be effectively utilized in cement production.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reciprocating feeding assembly, characterized in that, Includes a loading section, a pushing section, and a propulsion mechanism; The material-carrying part has a material-pushing outlet, and the material-pushing part slides back and forth on the material-carrying part toward the material-pushing outlet; The pushing mechanism is flexibly connected to the pushing part, thereby pushing the pushing part to slide. The material loading section includes a support block, an end block, and a guide block. The material pushing section slides on the support block. The end block is installed on the side of the support block away from the material pushing outlet, and the guide blocks are installed on both sides of the support block. The material loading section also includes a fixing plate, which covers both sides of the support block; the material pushing section includes a pushing block; the support block is provided with a cleaning groove that extends through both sides, the bottom surface of the pushing block is provided with an inward concave surface, and the fixing plate is provided with a cleaning port corresponding to the cleaning groove. The pushing mechanism includes a push rod and a driving device. One end of the push rod passes through the end block and is flexibly connected to the push block, and the other end of the push rod is connected to the driving device.

2. The reciprocating feeding assembly according to claim 1, characterized in that, The material loading section also includes limiting blocks, which are installed on the support block on both sides near the material pushing outlet. The guide blocks are installed on the support block on both sides away from the material pushing outlet. The side surfaces of the limiting blocks and the guide blocks are in staggered contact through concave and convex interfaces. The bottom surface of the limiting blocks and the support block are in staggered contact through concave and convex interfaces. The two limiting blocks can be relatively far apart or close together.

3. The reciprocating feeding assembly according to claim 2, characterized in that, Connectors are pre-embedded on the outer sides of the support block, the guide block, and the limiting block, and the connectors extend out of the fixing plate.

4. The reciprocating feeding assembly according to claim 3, characterized in that, The pusher block slides along the groove formed by the support block, the guide block, and the limiting block.

5. A combustion device comprising the reciprocating feeding assembly as described in claim 4, characterized in that, The furnace includes a furnace shell, which is provided with a feeding port, an air inlet, and a flue gas and ash outlet. The furnace shell has a stepped structure with multiple reciprocating feeding components.

6. The combustion device according to claim 5, characterized in that, The connecting piece of the limiting block is movably connected to the fixing plate and the furnace shell, and the connecting piece of the limiting block extends out of the side wall of the furnace shell and is connected to the compression spring.

7. The combustion device according to claim 6, characterized in that, The furnace shell is provided with an ash removal port at the position corresponding to the cleaning port.

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