Equipment and preparation method of solid-waste-based composite catalytic combustion improver for coal combustion

Abstract

The invention discloses equipment and a preparation method of a solid-waste-based composite catalytic combustion improver for coal combustion, and relates to the technical field of catalytic combustion improver preparation, and the solid-waste-based composite catalytic combustion improver comprises a preheating device and a drying device; the preheating device comprises a preheating box and a mesh belt arranged in the preheating box, the mesh belt is provided with mesh holes, a top frame is installed at the top of the preheating box, a feeding frame used for feeding materials to the mesh belt is arranged in the top frame, an elastic piece is arranged between the feeding frame and the inner wall of the top frame, and a pasting frame is arranged at the bottom end of the top frame; and a bearing box which is distributed corresponding to the pasting frame and is in linkage control with the pasting frame is arranged in the inner ring of the mesh belt. According to the equipment of the solid-waste-based composite catalytic combustion improver for coal combustion and the preparation method, by arranging the pasting frame, the bearing box and other structures, the equipment has the functions of conveying, spreading, preheating and the like, a preheating cavity with the upper-pressing and lower-supporting supporting effect is formed, materials are flatly spread and preheated before entering a drying device, and the drying efficiency is improved; the preparation effect of the composite catalytic combustion improver is improved.

Description

Technical Field

[0001] This invention relates to the field of catalytic combustion aid preparation technology, and particularly to equipment and preparation methods for solid waste-based composite catalytic combustion aids for coal combustion. Background Technology

[0002] In the field of coal combustion, the application of composite catalytic combustion aids has become an important technological direction in order to improve combustion efficiency and reduce pollutant emissions. Among them, solid waste-based composite catalytic combustion aids prepared from industrial solid wastes such as fly ash, coal gangue, and steel slag have attracted widespread attention in the industry because they have the dual value of "resource utilization of solid waste" and "efficient combustion of coal".

[0003] In the preparation of composite catalytic combustion aids, existing processes often directly feed the granular material into a belt dryer for high-temperature drying after granulation. Even if a few processes add a preheating step, they mostly use crude preheating methods such as open hot air blowing, which can easily lead to uneven moisture distribution of the particles. This can cause the particles to break during subsequent high-temperature drying, thus affecting the performance of the composite catalytic combustion aid.

[0004] Therefore, it is necessary to propose equipment and preparation methods for solid waste-based composite catalytic combustion aids for coal combustion to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide equipment and preparation method for a solid waste-based composite catalytic combustion aid for coal combustion, in order to solve the problem that existing processes often directly feed the granular material into a belt dryer for high-temperature drying after granulation. Even if a few processes add a preheating step, they mostly use crude preheating methods such as open hot air blowing, which still easily leads to uneven moisture distribution of particles, particle breakage during subsequent high-temperature drying, and thus affects the performance of the composite catalytic combustion aid.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an equipment for a solid waste-based composite catalytic combustion aid for coal combustion, comprising a preheating device and a drying device; The preheating device includes a preheating box and a mesh belt installed inside the preheating box. The mesh belt has mesh holes. A top frame is installed on the top of the preheating box. A feeding frame for feeding material into the mesh belt is installed inside the top frame. An elastic sheet is installed between the feeding frame and the inner wall of the top frame. A sticker frame is installed at the bottom of the top frame. The inner ring of the conveyor belt has support boxes that are distributed and linked to the mounting frame; During feeding, the support box and the frame move towards each other, clamping the upper part of the mesh belt and forming a preheating chamber. The feeding frame moves back and forth along the length of the top frame to lay the material flat, and the support box conveys the preheating gas upward. The feeding frame drives the processing component to move and cover to remove water vapor. During cleaning, the frame is individually attached to the upper surface of the conveyor belt to push and scrape the moving conveyor belt.

[0007] Preferably, a horizontal plate is provided in the inner circle of the mesh belt, the horizontal plate is fixedly connected to the inner wall of the preheating box, a second electric push rod is installed on the top of the horizontal plate, and the support box is fixed on the telescopic end of the second electric push rod.

[0008] Preferably, a linkage component for cooperating to move in opposite directions or backwards is provided between the support box and the mounting frame. The linkage component includes a lower rack, an upper rack, and a gear. The lower rack is fixed on the support box, the upper rack is fixed on the mounting frame, and the gear is rotatably disposed in the preheating box. The lower rack and the upper rack are respectively distributed on both sides of the gear, and both the lower rack and the upper rack are meshed with the gear.

[0009] Preferably, an elastic telescopic rod is provided between the upper rack and the frame.

[0010] Preferably, a slide rail is provided on the side wall of the top frame, a square tube is slidably arranged inside the slide rail, and the feed frame is fixedly connected to the square tube. A third electric push rod is provided on the outside of the top frame to drive the square tube and the feed frame to move back and forth.

[0011] Preferably, the processing component includes a suction cylinder, which is fixedly installed at the bottom of the feed frame. The suction cylinder is connected to a square tube, and the bottom of the suction cylinder has multiple suction grooves. One end of the square tube located outside the top frame is connected to a first connecting pipe, which extends to the outside of the preheating box and is connected to the factory's suction pipe.

[0012] Preferably, the support box is connected to a second connecting pipe, which extends to the outside of the preheating box and is connected to the gas delivery pipeline of the plant.

[0013] Preferably, the top of the feed frame is fitted with a plate, and a first electric push rod is fixedly installed on the inner wall of the feed frame. The plate is fixedly installed on the telescopic end of the first electric push rod.

[0014] Preferably, the preheating box is equipped with a drive mechanism that drives the mesh belt to move and convey. The drive mechanism includes a motor and two rollers.

[0015] This invention also discloses a method for preparing a solid waste-based composite catalytic combustion aid for coal combustion. The equipment using the aforementioned solid waste-based composite catalytic combustion aid for coal combustion further includes the following operational steps: S1. Material pretreatment: Industrial solid wastes such as fly ash, coal gangue, and steel slag are processed through crushing, activation, and granulation to obtain granular materials with uniform particle size. S2. Closed preheating treatment: A preheating space is formed in the preheating device, and then the granular material is fed in and evenly spread in the preheating space. Preheating gas is introduced and water vapor is removed at the same time. S3. Continuous drying process: The preheated granular material is conveyed to the drying equipment for high-temperature drying until the overall moisture content drops to the process requirement standard. S4. Molding: The dried granular material is cooled and shaped before being collected as the finished product.

[0016] The technical effects and advantages of this invention are as follows: 1. This invention combines conveying, spreading, and preheating functions by setting up a frame and a support box, and forms a preheating chamber with an upper pressure and lower support effect. The material is spread out and preheated before entering the drying device, which improves the preparation effect of the composite catalytic combustion aid. 2. This invention uses structures such as suction cylinders and suction grooves to remove water vapor generated during the heating process of materials in a moving, covering manner, ensuring the efficiency of water vapor treatment. 3. The structure includes square tubes and a third electric push rod to assist the top frame in moving and feeding, the elastic sheet in changing and shaking, and the suction cylinder in moving to remove moisture. This makes the operation convenient and reduces the cost of equipment use. 4. The support box and the frame can move in opposite directions to each other, which ensures the stability of the mesh belt and does not affect the material conveying driven by the mesh belt. 5. This invention expands the feeding range by setting up a feeding frame, elastic sheet and other structures, and at the same time makes the material in the top frame turn over to prevent blockage. 6. This invention uses structures such as elastic telescopic rods to drive the frame to adhere to the mesh belt, and uses the mesh belt's rotation to achieve automatic pushing and scraping cleaning, eliminating the need for manual scraping and reducing the labor intensity of operators. At the same time, the elastic telescopic rods have the ability to contract, which can effectively prevent the mesh belt from being damaged compared to rigid contact methods. 7. The present invention achieves the opening and closing of the feeding frame by setting up a composite plate, a first electric push rod and other structures, thereby controlling the feeding and keeping the preheating chamber in a closed state. The preheating airflow and water vapor extraction are not affected by the external atmospheric environment, thus improving the preheating efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the equipment structure for the solid waste-based composite catalytic combustion aid used in coal combustion according to the present invention.

[0018] Figure 2 This is a schematic diagram of the preheating box and mesh belt structure of the present invention.

[0019] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0020] Figure 4 For the present invention Figure 2 Enlarged schematic diagram of the structure at point B.

[0021] Figure 5 This is a schematic diagram of the connecting plate and the third electric push rod structure of the present invention.

[0022] Figure 6 This is a schematic diagram of the frame and feed frame structure of the present invention.

[0023] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point C.

[0024] Figure 8 This is a schematic diagram of the support box structure of the present invention.

[0025] Figure 9 This is a schematic diagram of the suction cylinder and suction groove structure of the present invention.

[0026] In the diagram: 1. Preheating device; 101. Preheating box; 2. Drying device; 3. Mesh belt; 301. Mesh; 4. Support box; 5. Top frame; 6. Frame; 7. Feeding frame; 8. Elastic sheet; 9. Composite plate; 10. First electric push rod; 11. Lower support plate; 12. Lower rack; 13. Upper support plate; 14. Upper rack; 15. Ear plate; 16. Gear; 17. Elastic telescopic rod; 18. Horizontal plate; 19. Second electric push rod; 20. Suction cylinder; 2001. Suction groove; 21. Square tube; 22. Slide rail; 23. Connecting plate; 24. Third electric push rod; 25. First connecting pipe; 26. Second connecting pipe; 27. Circular roller; 28. Motor; 29. ​​Discharge chute. Detailed Implementation

[0027] This invention provides, for example Figures 1-9 The equipment shown for producing a solid waste-based composite catalytic combustion aid for coal combustion includes a preheating device 1 and a drying device 2. Industrial solid waste is processed through crushing, activation, and granulation to form granular materials that meet processing requirements. The materials are then fed into the preheating device 1 for preheating treatment, which lays a uniform moisture foundation for subsequent high-temperature drying and reduces particle deformation and adhesion problems. After preheating, the materials enter the drying device 2 for drying treatment and are finally cooled to obtain the solid waste-based composite catalytic combustion aid.

[0028] The drying device 2 includes a drying chamber, a fan, a temperature / humidity monitoring module, and other structures. The drying device 2 is a common existing technology and will not be described in detail here.

[0029] To achieve efficient and uniform preheating, the preheating device 1 includes a preheating box 101. The preheating box 101 is covered with an insulation layer of glass wool board insulation structure. The thickness of the glass wool board is 50-80mm. It is double-fixed with high-temperature resistant inorganic adhesive and insulation nails. The board seams are filled with glass wool felt and coated with high-temperature sealant to reduce heat loss rate and effectively ensure the stability of the preheating temperature inside the box.

[0030] The preheating box 101 is equipped with a mesh belt 3. The mesh belt 3 is made of "316L stainless steel woven mesh". The mesh surface has high flatness and excellent temperature resistance. The mesh belt 3 has mesh holes 301 with appropriate inner diameter, which ensures that the preheating gas can pass through while preventing particulate materials from falling.

[0031] The top of the preheating box 101 is provided with a square groove, and a top frame 5 is fixedly installed inside the square groove. The material is fed through the top frame 5, which is located at the end of the preheating box 101 away from the drying device 2. This is the feeding end of the preheating box 101. The end of the preheating box 101 near the drying device 2 is provided with a discharge chute 29, which facilitates guiding the preheated material to the drying device 2. This is the discharge end of the preheating box 101.

[0032] The preheating box 101 is equipped with a drive mechanism that drives the mesh belt 3 to move and convey materials. The drive mechanism includes a motor 28 and two rollers 27. The two rollers 27 are respectively rotatably mounted at the feed end and the discharge end of the preheating box 101. The mesh belt 3 is sleeved on the outside of the two rollers 27. The output shaft of the motor 28 is connected to the end of one of the rollers 27, which can drive the roller 27 to rotate, thereby driving the mesh belt 3 to circulate and convey materials.

[0033] A sliding frame 6 is provided on the outside of the bottom of the top frame 5. When the frame 6 slides down, its bottom end can contact the mesh belt 3 to form a barrier area for the material to be laid flat. When the frame 6 returns to its original position, there is a gap between its bottom end and the mesh belt 3, which does not affect the movement of the material by the mesh belt 3. Moreover, the width of the mesh belt 3 is greater than the width of the frame 6. Even when the frame 6 returns to its original position and moves up, the material that was originally attached to the inner wall of the frame 6 will slide outward and will not fall off the mesh belt 3.

[0034] In actual use, rubber sealing gaskets are installed on the outer wall of the top frame 5 and the bottom of the side frame 6 to reduce wear and ensure sealing.

[0035] To ensure the material is evenly distributed on the mesh belt 3, the top frame 5 has a feeding frame 7 for feeding the material onto the mesh belt 3. The feeding frame 7 is distributed along the width direction of the top frame 5, and both ends of the feeding frame 7 are attached to the inner wall of the top frame 5. The ends of the feeding frame 7 are equipped with wear-resistant pads and other structures. The feeding frame 7 moves along the length direction of the top frame 5. Elastic sheets 8 are fixedly connected to both sides of the feeding frame 7. The end of the elastic sheet 8 away from the feeding frame 7 is fixedly connected to the upper half of the inner wall of the top frame 5. The two elastic sheets 8 are distributed in a V-shape. This V-shaped structure can adapt to deformation as the feeding frame 7 moves back and forth. The elastic sheet 8 is made of "glass fiber reinforced high-temperature resistant silicone rubber", which can withstand the temperature of the conventional preheating airflow in the preheating device 1. Even if it encounters short-term fluctuations in the preheating gas, it will not soften, deform, or release harmful substances. At the same time, an additional layer of polytetrafluoroethylene wear-resistant strip is wrapped around the side of the elastic sheet 8 and the edge that is attached to the inner wall of the top frame 5 to extend the service life of the elastic sheet 8 and prevent the gap from widening due to wear.

[0036] In actual use, the material is fed into the top frame 5 by a belt conveyor or similar means. Guided by the elastic sheet 8, the material slides down from the feed frame 7, while the top frame 5 moves along its length to expand the feeding range. During the movement of the top frame 5, the material inside the top frame 5 is turned over by the deformation of the elastic sheet 8 to prevent blockage.

[0037] In summary, the present invention expands the feeding range by setting up structures such as the feeding frame 7 and the elastic sheet 8, while also causing the material in the top frame 5 to tumble, thus preventing blockage.

[0038] To control the movement of the feed frame 7, a slide rail 22 is provided on the side wall of the top frame 5. A square tube 21 is slidably arranged inside the slide rail 22, and the feed frame 7 is fixedly connected to the square tube 21. A third electric push rod 24 is provided on the outside of the top frame 5 to drive the square tube 21 and the feed frame 7 to move back and forth. The fixed end of the third electric push rod 24 is fixedly connected to the outer wall of the top frame 5, and a connecting plate 23 is fixedly connected to the telescopic end of the third electric push rod 24. The end of the connecting plate 23 away from the third electric push rod 24 is fixedly connected to the square tube 21.

[0039] During operation, the third electric push rod 24 drives the square tube 21 to reciprocate in a straight line along the slide 22 through the connecting plate 23, thereby pulling the feeding frame 7 to move along the length of the top frame 5, so as to achieve uniform spreading of materials.

[0040] Considering that the material will put a load on the mesh belt 3, which may cause the mesh belt 3 to dent locally, in order to achieve the support effect and the directional conveying of the preheated gas, a support box 4 corresponding to the frame 6 is set in the inner circle of the mesh belt 3. The top of the support box 4 is open, and the length and width of the support box 4 are the same as the length and width of the frame 6.

[0041] A second connecting pipe 26 is connected to the support box 4. A long groove is provided on the side wall of the preheating box 101 for the second connecting pipe 26 to pass through. The groove has a relatively high height, so as not to affect the vertical movement of the support box 4 and the second connecting pipe 26. Simultaneously, the second connecting pipe 26 passes through the long groove and extends to the outside of the preheating box 101. The second connecting pipe 26 is connected to the factory's gas delivery pipeline via a flexible hose or similar means. Specifically, preheating gas can be supplied to the interior of the support box 4 through the second connecting pipe 26. The preheating gas is sprayed upwards from the top of the support box 4, thus passing through the mesh 301 and acting on the material, causing the material to tumble and ensuring uniform heating.

[0042] To achieve synchronous movement between the support box 4 and the mounting frame 6, a horizontal plate 18 is provided in the inner ring of the mesh belt 3. The horizontal plate 18 is fixedly connected to the inner wall of the preheating box 101, and a second electric push rod 19 is installed on the top of the horizontal plate 18. The support box 4 is fixed to the telescopic end of the second electric push rod 19. Specifically, the second electric push rod 19 drives the support box 4 to move up and down.

[0043] A linkage component is provided between the support box 4 and the mounting frame 6, which enables the support box 4 and the mounting frame 6 to move towards or away from each other.

[0044] In specific configuration, the linkage components include a lower support plate 11, a lower rack 12, an upper support plate 13, an upper rack 14, an ear plate 15, a gear 16, and an elastic telescopic rod 17. The lower support plate 11 is fixedly connected to the outer wall of the support box 4, and the lower rack 12 is fixedly connected to the lower support plate 11. The lower support plate 11 and the lower rack 12 are arranged in an L-shape. The elastic telescopic rod 17 is vertically distributed, and the fixed end of the elastic telescopic rod 17 is fixedly connected to the outer wall of the frame 6. The upper support plate 13 is fixedly connected to the telescopic end of the elastic telescopic rod 17. The upper rack 14 is fixedly connected to the upper support plate 13. The upper support plate 13 and the upper rack 14 are arranged in an inverted L-shape. The ear plate 15 is fixedly connected to the inner wall of the preheating box 101. The gear 16 is rotatably mounted on the ear plate 15. The lower rack 12 and the upper rack 14 are respectively distributed on both sides of the gear 16, and both the lower rack 12 and the upper rack 14 are meshed with the gear 16.

[0045] When preheating is required, the control motor 28 stops running and the conveyor belt 3 stops moving. When the extension end of the control second electric push rod 19 extends, it drives the support box 4 to move vertically upward. The lower support plate 11 and the lower rack 12 move upward synchronously. Since the lower rack 12 and the upper rack 14 are respectively distributed on both sides of the gear 16, and both the lower rack 12 and the upper rack 14 are meshed with the gear 16, the upper support plate 13 and the upper rack 14 drive the frame 6 to slide downward at the bottom of the top frame 5. The frame 6 first adheres to the upper surface of the upper part of the conveyor belt 3. As the extension end of the second electric push rod 19 continues to extend, the elastic telescopic rod 17 retracts until the support box 4 adheres to the lower surface of the upper part of the conveyor belt 3. Since the elastic support force of the elastic telescopic rod 17 is appropriate, the frame 6 will not excessively squeeze the conveyor belt 3.

[0046] Next, the frame 6 and the support box 4 are aligned vertically to form a support structure with the upper part pressing down and the lower part supporting, ensuring the stability of the mesh belt 3. At the same time, the frame 6 is attached to the mesh belt 3 to form a space for the material to be laid flat. With the connection and cooperation of the mesh 301, a preheating chamber is formed between the support box 4 and the frame 6. Compared with an open preheating space, this can improve the utilization rate of preheating gas, make the evaporation of material moisture and the discharge of water vapor more controllable, and reduce the fluctuation of material preheating temperature.

[0047] After the upper frame 6 and the support box 4 form a support structure with the upper pressing and the lower supporting, the material is fed from the top frame 5. At the same time, the third electric push rod 24 is activated. The third electric push rod 24 pulls the feeding frame 7 along the length direction of the top frame 5 through the connecting plate 23 and the square tube 21, so that the material falls evenly on the area of ​​the mesh belt 3 in the preheating space, completing the flat laying operation, avoiding accumulation, and ensuring the preheating effect.

[0048] Next, preheating gas is delivered through the second connecting pipe 26 and the support box 4. The preheating gas passes through the mesh 301 and acts on the material, causing the material to turn over and come into full contact with the preheating gas, ensuring uniform heating.

[0049] In summary, the present invention, by setting up structures such as the frame 6 and the support box 4, combines the functions of conveying, spreading, and preheating, and forms a preheating chamber with an upper pressure and lower support effect. Before entering the drying device 2, the material is spread out and preheated, thereby improving the preparation effect of the composite catalytic combustion aid.

[0050] At the same time, the relative or opposite movement of the support box 4 and the frame 6 ensures the stability of the mesh belt 3 without affecting the material movement and conveying driven by the mesh belt 3.

[0051] Considering that water vapor will be generated during the heating process of the material, a processing component is set at the feed frame 7 to achieve rapid treatment of the water vapor. The processing component includes a suction cylinder 20, which is fixedly installed at the bottom of the feed frame 7. The suction cylinder 20 can move synchronously with the feed frame 7 along the length of the top frame 5. The bottom of the suction cylinder 20 has multiple suction grooves 2001. The square tube 21 located outside the top frame 5 is connected to a first connecting pipe 25. The top of the preheating box 101 is provided with a long groove for the first connecting pipe 25 to pass through. The long groove has a relatively long length and does not affect the movement of the square tube 21, the first connecting pipe 25, etc. The first connecting pipe 25 extends to the outside of the preheating box 101 and is connected to the factory's suction pipe.

[0052] During the preheating process, the first connecting pipe 25, square pipe 21, suction cylinder 20 and suction groove 2001 suck up the water vapor generated during the heating of the material. At the same time, the suction cylinder 20 and the feeding frame 7 move synchronously along the length of the top frame 5 to achieve mobile covering suction of water vapor.

[0053] In summary, this invention, by setting up structures such as suction cylinder 20 and suction groove 2001, removes water vapor generated during the heating process of materials in a moving, covering manner, thus ensuring the efficiency of water vapor treatment.

[0054] Meanwhile, the structure includes square tube 21 and third electric push rod 24 to assist the top frame 5 in moving and flattening the material, the elastic sheet 8 in deforming and shaking, and the suction cylinder 20 in moving to remove moisture, making operation convenient and reducing equipment operating costs.

[0055] After preheating, when the extension end of the second electric push rod 19 is retracted, it drives the support box 4 to move vertically downward. The lower support plate 11 and the lower rack 12 move downward synchronously. Since the lower rack 12 and the upper rack 14 are respectively distributed on both sides of the gear 16, the lower rack 12 and the upper rack 14 are meshed with the gear 16, so that the upper support plate 13 and the upper rack 14 drive the frame 6 to slide upward on the top frame 5. The frame 6 and the support box 4 are disengaged from the mesh belt 3. There is a gap between the bottom end of the frame 6 and the mesh belt 3. Then, the motor 28 continues to run, and the mesh belt 3 transports the preheated material into the drying device 2.

[0056] Repeat the above steps to achieve parallel and continuous production of "drying one batch of materials and preheating another batch of materials".

[0057] When it is necessary to scrape and clean the outer surface of the mesh belt 3, the telescopic end of the second electric push rod 19 is extended, driving the support box 4 to move vertically upward. The lower support plate 11 and the lower rack 12 move upward synchronously. Since the lower rack 12 and the upper rack 14 are respectively distributed on both sides of the gear 16, and both the lower rack 12 and the upper rack 14 are meshed with the gear 16, the upper support plate 13 and the upper rack 14 drive the adhesive frame 6 to slide downward on the top frame 5. The adhesive frame 6 first adheres to the upper surface of the mesh belt 3, and the telescopic end of the second electric push rod 19 is immediately stopped from extending. At this time, the elastic telescopic rod 17 is in an uncompressed state, and the support box 4 will not contact the mesh belt 3. When the mesh belt 3 moves, the adhesive frame 6 can scrape and remove large pieces of debris, assisting the operator in cleaning the mesh belt 3 and reducing the operator's workload.

[0058] In summary, this invention, by setting up structures such as the elastic telescopic rod 17, drives the frame 6 to adhere to the mesh belt 3, and utilizes the rotation of the mesh belt 3 to achieve automatic pushing and scraping cleaning, eliminating the need for manual scraping and reducing the labor intensity of operators. At the same time, the elastic telescopic rod 17 has the ability to contract, which can effectively prevent the mesh belt 3 from being damaged compared to rigid contact methods.

[0059] The top of the feeding frame 7 is fitted with a plate 9, and a first electric push rod 10 is fixedly installed on the inner wall of the feeding frame 7. The plate 9 is fixedly installed on the telescopic end of the first electric push rod 10. When feeding, the first electric push rod 10 drives the plate 9 to move upward, so that the top of the feeding frame 7 opens, and the plate 9 moves downward, so that the top of the feeding frame 7 closes, thereby controlling the feeding.

[0060] In addition, during the preheating process, the top of the feed frame 7 can be closed, so that the preheating chamber is in a closed state, and the preheating airflow and water vapor extraction are not affected by the external atmospheric environment, thus improving the preheating efficiency.

[0061] The first electric push rod 10 is powered by a high-temperature resistant and flame-retardant wire (temperature resistance above 125℃). The wire is laid along the pre-set wire groove on the inner wall of the feed frame 7. The wire groove is filled with high-temperature resistant sealant. The wire extends from the feed frame 7 to the inside of the square tube 21, and then leads out from the slide rail 22 to the outside of the top frame 5 along with the square tube 21. This avoids the wire from aging due to exposure to the preheating environment and does not affect the reciprocating movement of the feed frame 7.

[0062] In summary, the present invention achieves the opening and closing of the feeding frame 7 by setting up the composite plate 9, the first electric push rod 10 and other structures, thereby controlling the feeding and keeping the preheating chamber in a closed state. The preheating airflow and water vapor extraction are not affected by the external atmospheric environment, thus improving the preheating efficiency.

[0063] The first electric push rod 10, the second electric push rod 19, the third electric push rod 24, etc. are all connected to the main power supply of the equipment and are automatically controlled by the automatic control system. The automatic control system includes a PLC main controller, a human-machine interface touch screen, multiple sensor components (including temperature sensors, stroke sensors, etc.) and relay modules. The automatic control system is a common existing technology and will not be described in detail here.

[0064] This invention also discloses a method for preparing a solid waste-based composite catalytic combustion aid for coal combustion. The equipment using the aforementioned solid waste-based composite catalytic combustion aid for coal combustion further includes the following operational steps: S1. Material pretreatment: Industrial solid wastes such as fly ash, coal gangue, and steel slag are processed through crushing, activation, and granulation to obtain granular materials with uniform particle size. S2. Closed preheating treatment: A preheating space is formed in the preheating device 1, and then the granular material is fed in and evenly spread in the preheating space. Preheating gas is introduced and water vapor is removed at the same time. S3. Continuous drying process: The preheated granular material is conveyed to the drying equipment 2 for high-temperature drying until the overall moisture content drops to the process requirement standard. S4. Molding: The dried granular material is cooled and shaped before being collected as the finished product.

Claims

1. An apparatus for solid waste based composite catalytic combustion aid for coal combustion, characterized by, The preheating device (1) and the drying device (2) are included. The preheating device (1) includes a preheating box (101) and a mesh belt (3) arranged in the preheating box (101), the mesh belt (3) has mesh holes (301), a top frame (5) is arranged on the top of the preheating box (101), the top frame (5) has a feeding frame (7) for feeding the mesh belt (3), an elastic sheet (8) is arranged between the feeding frame (7) and the inner wall of the top frame (5), and a sticking frame (6) is arranged at the bottom end of the top frame (5). A supporting box (4) is arranged in the inner ring of the mesh belt (3) and is correspondingly distributed and connected with the sticking frame (6). When feeding, the supporting box (4) and the sticking frame (6) move towards each other, clamp the upper part of the mesh belt (3) and form a preheating chamber, the feeding frame (7) reciprocates along the length direction of the top frame (5) to lay the material, the preheating gas is upwardly conveyed by the supporting box (4), and the processing assembly is moved and covered to absorb water vapor by the feeding frame (7). When cleaning, the sticking frame (6) is separately stuck to the upper surface of the mesh belt (3) to push and scrape the moving mesh belt (3).

2. The apparatus for solid waste based composite catalytic combustion aid for coal combustion as claimed in claim 1 wherein, A horizontal plate (18) is arranged in the inner ring of the mesh belt (3) and is fixedly connected to the inner wall of the preheating box (101), a second electric push rod (19) is arranged on the top of the horizontal plate (18), and the supporting box (4) is fixed to the telescopic end of the second electric push rod (19).

3. The apparatus for solid waste based composite catalytic combustion aid for coal combustion as claimed in claim 1 wherein, A linkage assembly for cooperation with the moving towards or away from each other is arranged between the supporting box (4) and the sticking frame (6), the linkage assembly includes a lower gear rack (12), an upper gear rack (14) and a gear (16), the lower gear rack (12) is fixed to the supporting box (4), the upper gear rack (14) is fixed to the sticking frame (6), and the gear (16) is rotatably arranged in the preheating box (101), the lower gear rack (12) and the upper gear rack (14) are respectively arranged on the two sides of the gear (16), and the lower gear rack (12) and the upper gear rack (14) are in meshing connection with the gear (16).

4. The apparatus for coal combustion of solid waste based composite catalytic combustion-supporting agent according to claim 3, characterized in that, An elastic telescopic rod (17) is arranged between the upper gear rack (14) and the sticking frame (6).

5. The apparatus for solid waste based composite catalytic combustion aid for coal combustion as claimed in claim 1 wherein, A slide (22) is arranged on the side wall of the top frame (5), a square tube (21) is slidably arranged in the slide (22), the feeding frame (7) is fixedly connected to the square tube (21), and a third electric push rod (24) is arranged outside the top frame (5) to drive the square tube (21) and the feeding frame (7) to reciprocate.

6. The apparatus for coal combustion of solid waste based composite catalytic combustion-supporting agent according to claim 5, characterized in that, The processing assembly includes a suction cylinder (20), the suction cylinder (20) is fixedly arranged at the bottom of the feeding frame (7), the suction cylinder (20) is in communication with the square tube (21), the bottom of the suction cylinder (20) has a plurality of suction grooves (2001), one end of the square tube (21) located outside the top frame (5) is communicated with a first connecting pipe (25), the first connecting pipe (25) extends to the outside of the preheating box (101) and is in communication with the suction pipeline of the factory.

7. The apparatus for solid waste based composite catalytic combustion aid for coal combustion as claimed in claim 1 wherein, The supporting box (4) is communicated with a second connecting pipe (26), the second connecting pipe (26) extends to the outside of the preheating box (101) and is in communication with the gas conveying pipeline of the factory.

8. The apparatus for solid waste based composite catalytic combustion aid for coal combustion as claimed in claim 1 wherein, The top end of the feeding frame (7) is matched with a joint plate (9), a first electric push rod (10) is fixedly installed on the inner wall of the feeding frame (7), and the joint plate (9) is fixedly installed on the telescopic end of the first electric push rod (10).

9. The apparatus for solid waste based composite catalytic combustion aid for coal combustion as claimed in claim 1 wherein, The preheating box (101) is provided with a driving mechanism for driving the movement and conveying of the mesh belt (3), and the driving mechanism comprises a motor (28) and two circular rollers (27).

10. A process for the preparation of solid waste based composite catalytic combustion-supporting agent for coal combustion characterized by, The apparatus for coal combustion of solid waste-based composite catalytic combustion-supporting agent according to any one of claims 1-9 further comprises the following operation steps: S1, material pretreatment: industrial solid wastes such as fly ash, coal gangue and steel slag are treated by crushing, activation and granulation processes to obtain granular materials with uniform particle size; S2, closed preheating treatment: a preheating space is formed in the preheating device (1), and then the granular materials are sent into and evenly laid in the preheating space, preheating gas is introduced and water vapor is simultaneously absorbed; S3, continuous drying treatment: the granular materials after preheating treatment are transported to the drying equipment (2) for high-temperature drying until the overall moisture content is reduced to the process requirement standard; S4, molding: the granular materials after drying are collected as finished products after cooling and setting.

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