Fire grate for household garbage gasification incinerator

Abstract

The utility model relates to a fire grate for a household garbage gasification incinerator. Comprising a fire grate shell, a water-cooling fire grate is installed in the middle of an inner cavity of the fire grate shell, the water-cooling fire grate is composed of a plurality of parallel steel pipes, the end of each steel pipe is fixedly connected with the side wall of the fire grate shell, and the end of each steel pipe is communicated with the outside of the fire grate shell; one end of each steel pipe of the water-cooling grate is sealed in the water inlet tank, and the other end of each steel pipe of the water-cooling grate is sealed in the water outlet tank; the comb teeth are installed on the comb tooth frame, the upper portions of the comb teeth are located between the adjacent steel pipes of the water-cooling grate, and the upper ends of the comb teeth are higher than the surface of the water-cooling grate. The problem that the temperature of the fire grate is too high is solved through a cooling means, the problems that ash on the fire grate is coked and uneven in distribution are solved through a technical means, the operation stability of the incinerator is guaranteed, and faults and safety accidents are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of incinerator equipment, in particular to a grate for a domestic garbage gasification incinerator. Background Art

[0002] Incinerators are used for biomass gasification and household waste gasification. The grate supports the combustion material and establishes a flat surface for combustion. During operation, the grate surface temperature is high. Gasifier grates are typically made of heavy, heat-resistant steel. During use, ash coking or uneven distribution can cause grate perforation and melting, potentially leading to production failures and even accidents.

[0003] In summary, it is necessary to develop and design a new structure for the grate of the incinerator, provide appropriate cooling means to avoid the problem of excessive grate temperature, and adopt appropriate technical means to solve the problems of ash coking and uneven distribution on the grate, ensure the stability of the incinerator operation, and reduce the occurrence of failures and safety accidents. Utility Model Content

[0004] The purpose of the utility model is to provide a grate for a domestic waste gasification incinerator, which adopts cooling means to avoid the problem of excessive grate temperature, adopts technical means to solve the problems of ash coking and uneven distribution on the grate, ensures the stability of the incinerator operation, and reduces the occurrence of faults and safety accidents.

[0005] The technical solution adopted by the utility model is: a grate for a domestic waste gasification incinerator, comprising a grate shell, windows are provided in the middle of the top wall and the middle of the bottom wall of the grate shell, a water-cooling grate is installed in the middle of the inner cavity of the grate shell, the water-cooling grate is composed of a plurality of parallel steel pipes, the ends of each steel pipe are fixedly connected to the side walls of the grate shell and the ends are connected to the outside of the grate shell, a water inlet tank and a water outlet tank are also installed on the outer wall of the grate shell, The water tank seals one end of each steel pipe of the water-cooling grate inside, and the water outlet tank seals the other end of each steel pipe of the water-cooling grate inside; it also includes a comb rack and a plurality of comb teeth installed on the comb rack, the comb rack and the comb teeth are located below the water-cooling grate, the upper part of each comb tooth is located between adjacent steel pipes of the water-cooling grate and the upper end is higher than the surface of the water-cooling grate, and it also includes a comb tooth drive device that drives the comb rack to move back and forth along the axial direction of the steel pipe of the water-cooling grate.

[0006] Preferably, the comb tooth drive device includes a front slide rail with a front slider and a rear slide rail with a rear slider installed inside the grate shell, the front slide rail and the rear slide rail are respectively located on the front and rear sides of the water-cooled grate, and the two ends of the comb tooth frame are respectively fixedly connected to the front slider and the rear slider; it also includes a drive assembly, the drive assembly includes a front transmission chain and a rear transmission chain, the front slider and the rear slider are respectively fixedly connected to the front transmission chain and the rear transmission chain, a comb tooth driving shaft is installed between the sprockets at one end of the two transmission chains, and a comb tooth driven shaft is installed between the sprockets at the other end, and it also includes a comb tooth motor that drives the comb tooth driving shaft.

[0007] Preferably, a left limit switch is installed at one end of the front slide rail and the rear slide rail through the left base, and a right limit switch is installed at the other end through the right base, and the end position of the comb rack movement is defined by the left limit switch and the right limit switch.

[0008] Preferably, one end of the comb tooth driving shaft passes through the side wall of the grate shell, and the comb tooth motor is fixed to the outside of the grate shell; inner partitions are installed between the front drive chain and the water-cooled grate and between the rear drive chain and the water-cooled grate.

[0009] Preferably, it also includes a water circulation component, which includes a water pump and a circulation pipeline. One end of the circulation pipeline is connected to the inlet provided on the water inlet tank, and the other end is connected to the outlet provided on the water outlet tank; heat sinks are also installed on the water inlet tank and the water outlet tank.

[0010] Preferably, the front and rear of the grate shell are open, and connecting wing plates are provided on the front and rear openings. Cover plates are installed on the front and rear openings, and the edges of the cover plates are fixedly connected to the connecting wing plates on this side by bolts and a sealing gasket is provided between the two.

[0011] The advantages and positive effects of the utility model are:

[0012] The utility model provides a grate for a domestic waste gasification incinerator. Compared with existing grates, the grate of the utility model provides a water inlet tank and a water outlet tank, allowing cooling water to flow into each steel pipe of the water-cooled grate, thereby achieving a water-cooling effect on the water-cooled grate and preventing the water-cooled grate from overheating. By providing a comb rack and comb teeth driven to move back and forth by a comb drive device, and the comb teeth moving horizontally between adjacent steel pipes of the water-cooled grate, the upper ends of the comb teeth loosen the combustion products and ash on the water-cooled grate, solving the problems of ash coking and uneven distribution, allowing the ash to pass through the water-cooled grate smoothly and finally be discharged smoothly from the bottom of the grate, ensuring the stability of the incinerator operation and reducing the occurrence of malfunctions and safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0014] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A;

[0015] Figure 3 yes Figure 1 Schematic diagram of the enlarged structure of part B;

[0016] Figure 4 It is a schematic diagram of the state structure of the utility model applied to an incinerator.

[0017] In the picture:

[0018] 1. Grate shell; 2. Water inlet tank; 3. Water outlet tank; 4. Water-cooled grate; 5. Comb teeth; 6. Comb tooth frame; 7. Front slider; 8. Rear slider; 9. Front slide rail; 10. Rear slide rail; 11. Front drive chain; 12. Rear drive chain; 13. Comb tooth driven shaft; 14. Comb tooth driving shaft; 15. Comb tooth motor; 16. Left base; 17. Right base; 18. Left limit switch; 19. Right limit switch. DETAILED DESCRIPTION

[0019] In order to further understand the content, features and effects of the present invention, the following embodiments are given to illustrate in detail.

[0020] See Figure 1 、 Figure 2 and Figure 3 The grate for the domestic waste gasification incinerator of the present invention includes a grate shell 1, and windows are provided in the middle of the top wall and the middle of the bottom wall of the grate shell 1. As shown in the figure, the grate shell 1 is a flat rectangular parallelepiped. The top window is used to dock with the lower port of the incinerator body, and the bottom window is used to discharge ash downward. Generally, a conical slag collecting hopper is installed at the bottom of the grate shell 1. The ash passing through the grate falls into the slag collecting hopper and is finally discharged from the bottom outlet.

[0021] A water-cooled grate 4 is installed in the center of the inner cavity of the grate shell 1. It is composed of multiple parallel steel pipes. The ends of each steel pipe are fixedly connected to the side walls of the grate shell 1 and extend through the exterior of the grate shell 1. The water-cooled grate 4 is used to support the combustion products, forming a combustion support surface. There are gaps between adjacent steel pipes in the water-cooled grate 4, and the burned ash passes downward through the gaps between the steel pipes.

[0022] A water inlet tank 2 and a water outlet tank 3 are also installed on the outer wall of the grate shell 1. The water inlet tank 2 seals one end of each steel pipe of the water-cooling grate 4 inside, and the water outlet tank 3 seals the other end of each steel pipe of the water-cooling grate 4 inside. Cooling water is injected into the water inlet tank 2, the water outlet tank 3 and the steel pipes of the water-cooling grate 4. The cooling water absorbs the heat energy of the water-cooling grate 4 to prevent the temperature from rising.

[0023] This embodiment also includes a water circulation assembly, comprising a water pump and a circulation pipeline. One end of the circulation pipeline is connected to the inlet of the water inlet tank 2 and the other end is connected to the outlet of the water outlet tank 3. The water pump is used to establish a cooling water circulation system. The cooling water absorbs heat from the water-cooled grate 4 and heats up, then cools down by exchanging heat with the surrounding environment outside the grate. Furthermore, heat sinks can be installed on the water inlet tank 2 and the water outlet tank 3 to enhance the cooling effect of the cooling water outside the grate.

[0024] The incinerator further comprises a comb rack 6 and a plurality of comb teeth 5 mounted on the comb rack 6. The comb rack 6 and the comb teeth 5 are located below the water-cooled grate 4. The upper portion of each comb tooth 5 is located between adjacent steel pipes of the water-cooled grate 4 and the upper end thereof is higher than the surface of the water-cooled grate 4. The incinerator further comprises a comb tooth driving device for driving the comb rack 6 to reciprocate along the axial direction of the steel pipes of the water-cooled grate 4. Under the driving action of the comb tooth driving device, the comb rack 6 and its comb teeth 5 reciprocate, and the comb teeth 5 reciprocate in the gaps between adjacent steel pipes, thereby loosening the combustion products and ash above the water-cooled grate 4, solving the problems of ash coking and uneven distribution, and allowing the ash to pass through the water-cooled grate 4 smoothly and finally be discharged smoothly from the bottom of the grate, thereby ensuring the stability of the incinerator operation and reducing the occurrence of malfunctions and safety accidents.

[0025] The comb drive device includes a front slide rail 9 with a front slider 7 and a rear slide rail 10 with a rear slider 8, mounted inside the grate housing 1. The front slide rail 9 and the rear slide rail 10 are located on the front and rear sides of the water-cooled grate 4, respectively. The comb frame 6 is fixedly connected to the front and rear sliders 7 and 8 at both ends, and also includes a drive assembly. Driven by the drive assembly, the front slider 7 and the rear slider 8 translate along the front slide rail 9 and the rear slide rail 10, respectively, correspondingly causing the comb frame 6 to translate forward and backward.

[0026] In this embodiment, the drive assembly includes a front drive chain 11 and a rear drive chain 12, and the front slider 7 and the rear slider 8 are fixedly connected to the front drive chain 11 and the rear drive chain 12 respectively. A comb tooth driving shaft 14 is installed between the sprockets at one end of the two drive chains, and a comb tooth driven shaft 13 is installed between the sprockets at the other end. It also includes a comb tooth motor 15 that drives the comb tooth driving shaft 14.

[0027] In this embodiment, one end of the comb tooth driving shaft 14 passes through the side wall of the grate shell 1, and the comb tooth motor 15 is installed and fixed on the outside of the grate shell 1, so as to prevent the comb tooth motor 15 from being in a high temperature environment. Inner partitions are installed between the front transmission chain 11 and the water-cooled grate 4, and between the rear transmission chain 12 and the water-cooled grate 4. The inner partitions of the box isolate the slide rail and its slider, transmission chain, etc. from the internal high temperature environment, thereby avoiding component deformation problems caused by the high temperature environment and ensuring the stability of operation.

[0028] In this embodiment, a left limit switch 18 is mounted on one end of each of the front and rear rails 9 and 10 via a left base 16, and a right limit switch 19 is mounted on the other end via a right base 17. The left and right limit switches 18 and 19 define the end positions of the movement of the comb rack 6. When the comb rack 6 moves to the left end position, the left limit switch 18 is triggered, and conversely, when the comb rack 6 moves to the right end position, the right limit switch 19 is triggered.

[0029] In this embodiment, the front and rear portions of the grate housing 1 are both open, with connecting wing plates provided on each of the front and rear openings. Cover plates are also installed on each of the front and rear openings. The edges of the cover plates are bolted to the connecting wing plates on their respective sides, with a sealing gasket provided between them. This allows the front and rear cover plates to be selectively removed and assembled as needed. When the front cover plate is removed, the front drive assembly is exposed. Similarly, when the rear cover plate is removed, the rear drive assembly is exposed, allowing for convenient maintenance operations. The provided sealing gaskets prevent smoke from leaking through the connection points.

[0030] How to run:

[0031] See Figure 4 , it can be seen that the present grate is installed at the bottom of the incinerator, and a slag collecting hopper is installed at the bottom of the grate. Domestic garbage is placed in the incinerator for incineration, and the combustion materials are supported by the water-cooled grate 4 of the present grate; during operation, the water pump of the water circulation component continues to run, and the cooling water has a continuous cooling effect on the water-cooled grate 4; at the same time, the comb drive device continues to operate, and the comb rack 6 and its comb teeth 5 move back and forth. When the limit switch at the end is triggered, a turn occurs. When the comb rack 6 and its comb teeth 5 move, the comb teeth 5 loosen the combustion materials and ash on the water-cooled grate 4, solving the problem of ash coking and uneven distribution, so that the ash can smoothly pass through the water-cooled grate 4 and be smoothly discharged from the bottom of the grate, and finally the ash is discharged from the bottom outlet of the slag collecting hopper below.

Claims

1. A grate for a domestic waste gasification incinerator, characterized by: The invention comprises a grate shell (1), wherein windows are provided in the middle of the top wall and the middle of the bottom wall of the grate shell (1), and a water-cooling grate (4) is installed in the middle of the inner cavity of the grate shell (1). The water-cooling grate (4) is composed of a plurality of parallel steel pipes, the ends of each steel pipe are fixedly connected to the side wall of the grate shell (1) and the ends are connected to the outside of the grate shell (1). A water inlet tank (2) and a water outlet tank (3) are also installed on the outer wall of the grate shell (1). The water inlet tank (2) seals one end of each steel pipe of the water-cooling grate (4). The invention relates to a water-cooling furnace grate (4) and a water outlet tank (3). The water outlet tank (3) seals the other end of each steel pipe of the water-cooling furnace grate (4) inside. The invention also includes a comb tooth frame (6) and a plurality of comb teeth (5) installed on the comb tooth frame (6). The comb tooth frame (6) and the comb teeth (5) are located below the water-cooling furnace grate (4). The upper part of each comb tooth (5) is located between adjacent steel pipes of the water-cooling furnace grate (4) and the upper end is higher than the surface of the water-cooling furnace grate (4). The invention also includes a comb tooth driving device for driving the comb tooth frame (6) to reciprocate along the axial direction of the steel pipe of the water-cooling furnace grate (4).

2. The grate for a domestic waste gasification incinerator as claimed in claim 1, characterized in that: The comb tooth driving device comprises a front slide rail (9) with a front slider (7) and a rear slide rail (10) with a rear slider (8) installed inside a grate shell (1), the front slide rail (9) and the rear slide rail (10) being located at the front and rear sides of a water-cooled grate (4), respectively, and the two ends of a comb tooth frame (6) being fixedly connected to the front slider (7) and the rear slider (8), respectively; and further comprises a driving assembly, the driving assembly comprising a front transmission chain (11) and a rear transmission chain (12), the front slider (7) and the rear slider (8) being fixedly connected to the front transmission chain (11) and the rear transmission chain (12), a comb tooth driving shaft (14) being installed between the sprockets at one end of the two transmission chains, and a comb tooth driven shaft (13) being installed between the sprockets at the other end thereof, and a comb tooth motor (15) for driving the comb tooth driving shaft (14).

3. The grate for a domestic waste gasification incinerator as claimed in claim 2, characterized in that: A left limit switch (18) is installed at one end of the front slide rail (9) and the rear slide rail (10) through a left base (16), and a right limit switch (19) is installed at the other end through a right base (17). The left limit switch (18) and the right limit switch (19) define the terminal position of the comb rack (6).

4. The grate for a domestic waste gasification incinerator as claimed in claim 3, characterized in that: One end of the comb tooth driving shaft (14) passes through the side wall of the grate shell (1), and the comb tooth motor (15) is fixedly mounted on the outside of the grate shell (1); and inner partitions are installed between the front transmission chain (11) and the water-cooled grate (4) and between the rear transmission chain (12) and the water-cooled grate (4).

5. The grate for a domestic waste gasification incinerator as claimed in claim 4, characterized in that: It also includes a water circulation component, which includes a water pump and a circulation pipeline. One end of the circulation pipeline is connected to an inlet provided on the water inlet tank (2), and the other end is connected to an outlet provided on the water outlet tank (3). Heat sinks are also installed on the water inlet tank (2) and the water outlet tank (3).

6. The grate for a domestic waste gasification incinerator according to any one of claims 1 to 5, characterized in that: The front and rear of the grate shell (1) are open, and connecting wing plates are provided on the front and rear openings. Cover plates are installed on the front and rear openings, and the edges of the cover plates are fixedly connected to the connecting wing plates on this side by bolts, and a sealing gasket is provided between the two.

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