A structure of a grate block for a domestic waste incineration grate furnace

Abstract

The present invention relates to a grate block structure of a domestic waste incineration grate furnace. The structure is assembled with a number of grate block structures of the same size between each row of grate modules; the side grate blocks are in an L-shaped cross-section. The inner side of the grate block is fixed to the inner side of the grate support beam with bolts, and a cavity is formed between the top surface and the support beam; a rib plate is provided on the lower side of the side grate block to form a card slot with the support beam, and a rib plate is provided on the upper side of the side grate block. After symmetric assembly, the rib plates of the two side grate blocks form a side grate block card slot. The problem of thermal expansion is solved, and the grate row modules can be increased in the width direction. The present invention can greatly improve the service life of the structure.

Description

Technical Field

[0001] The present invention relates to the field of incineration equipment, and particularly to an intermediate grate block structure applied to the grate of an incinerator. Background Art

[0002] With the continuous development of urban economic construction and the continuous improvement of the living standards of citizens, a large amount of urban domestic waste is continuously generated every day. Therefore, the single-line processing capacity of the mechanical grate of the waste incinerator needs to be further improved. Along with the increase in the processing capacity, the grate area also increases.

[0003] Therefore, in order to increase the daily processing capacity of the grate and increase the surface area of the grate, but without changing the length direction, it is necessary to add a row of grate modules in the width direction of the grate. Each row of grates has a separate driving device, which can freely adjust the speed to prevent phenomena such as uneven feeding.

[0004] That is, the grate is composed of three rows of modules, and there will be problems of thermal expansion compensation for the expansion joints between the modules. There is a need for a grate block structure to absorb thermal expansion and control problems such as ash leakage and material accumulation. Summary of the Invention

[0005] The object of the present invention is to overcome the above problems and propose a grate block structure for a domestic waste incinerator grate.

[0006] The specific technical solution of the present invention is: a grate block structure for a domestic waste incinerator grate, and a number of grate block structures with the same size are assembled between each row of grate modules;

[0007] The side grate block is in an L-shaped cross-section. The inner side of the side grate block is fixed to the inner side of the grate support beam with bolts, and the top surface forms a cavity with the support beam; a rib plate is provided on the lower side of the side grate block to form a card slot with the support beam, and a side grate block rib plate is provided on the upper side of the side grate block. After symmetric assembly, the two rib plates form a side grate block card slot.

[0008] Further, the outer side of the intermediate grate cover plate is in a semi-cylindrical shape; it can prevent surface garbage accumulation, and is not easily burned and worn. Two intermediate grate cover plate rib plates are provided on the inner side, and through holes are opened on each intermediate grate cover plate rib plate. The setting of the intermediate grate cover plate rib plates can facilitate casting and prevent deformation.

[0009] Further, it further includes a grate cover plate bracket. The bottom of the grate cover plate bracket is in an I-shaped shape and can be inserted into the cavity formed by the side grate block and the support beam. The side grate block and the support beam form a side grate block card slot to fix the up and down positions of the grate cover plate bracket. The grate cover plate bracket is provided with a clamping plate to cooperate with the rib plate on the lower side of the side grate block to position the installation of the grate cover plate bracket. Two hooks are provided on the grate cover plate bracket in a direction opposite to the direction of garbage advancement, and the hooks are installed in cooperation with the through holes on the intermediate grate cover plate rib plate.

[0010] Furthermore, a unidirectionally fixed L-shaped stainless steel plate is provided at the gap between the side grate blocks and the grate support beam. The fixing holes are shared with the side grate blocks, which can prevent leachate from leaking and corroding the grate.

[0011] Furthermore, after the overall combination and fixation, an expansion joint type grate block is formed and directly leads to the air-cooled beam. The internal voids of the grate block and the cavities formed by the stainless steel allow the cooling air to pass through and play a cooling effect.

[0012] The beneficial effects of the present invention are as follows: The problem of thermal expansion is solved, and the number of grate side-by-side modules can be increased in the width direction. Moreover, the stainless steel design can prevent leachate from leaking and causing corrosion of the grate frame. A unidirectionally fixed stainless steel plate is laid at the expansion joint, which plays a sealing role and is beneficial for sliding after thermal expansion. The middle grate cover plate and the side grate blocks are installed in the same length direction, which is simple to install. After assembly, it directly leads to the air-cooled beam, and cavities are formed by each cover plate and the stainless steel plate. The cooling air is blown in to play an air-cooling effect. The cover plate is designed in an arc shape to prevent material accumulation and is not easily burned out, greatly improving the service life of this structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The front view of the grate furnace in the present invention.

[0014] Figure 2 The side view of the grate furnace in the present invention.

[0015] Figure 3 The installation schematic diagram of the grate blocks in the present invention.

[0016] Figure 4 The schematic diagram of the middle side grate blocks in the present invention.

[0017] Figure 5 The three views (front view, side view, and top view) of the grate cover plate bracket in the present invention.

[0018] Figure 6 The three views (front view, side view, and top view) of the middle grate cover plate in the present invention.

[0019] In the figure: 101 - grate side support beam, 102 - middle side grate block, 103 - side grate block rib plate, 104 - grate cover plate bracket, 105 - bracket clamping plate, 106 - bracket hook, 107 - middle grate cover plate, 108 - grate cover plate hole, 109 - side grate block slot, 110 - stainless steel plate. DETAILED DESCRIPTION OF THE INVENTION

[0020] Such as Figure 1 、 Figure 2As shown in the figure, for a grate of a domestic waste incinerator, since the water content in the waste is as high as 50%, the thickness of the waste layer during combustion is about 500 mm, the surface temperature of the grate is between 200 - 450 °C, and the waste contains leachate with strong corrosiveness. There is a drop wall of about 1.6 m between the drying, combustion, and burnout sections in the length direction of the grate. When the waste drops from the drop wall, it has a loosening effect, but it will impact the expansion structure. Therefore, the material is selected as high-chromium cast steel material with high temperature resistance, wear resistance, corrosion resistance, and impact resistance.

[0021] As Figures 3 to 6 shown in the figure, for a grate block structure of a domestic waste incinerator grate, several grate block structures with the same size are assembled between each column of grate modules; the side grate blocks are in an L-shaped cross-section. The inner side of the side grate block is fixed to the inner side of the grate support beam with bolts, and the top surface forms a cavity with the support beam; there are rib plates on the lower side of the side grate block, and the rib plates and the support beam form a card slot. There is a side grate block rib plate 103 on the upper side of the side grate block. After symmetric assembly, the two side grate block rib plates 103 form a side grate block card slot 109.

[0022] The outer side of the middle grate cover plate is in a semi-cylindrical shape; it can prevent the accumulation of surface waste, and is not easily burned and worn. There are two middle grate cover plate rib plates on the inner side, and through holes are opened on each middle grate cover plate rib plate. The setting of the middle grate cover plate rib plates can facilitate casting and prevent deformation.

[0023] The bottom of the grate cover plate bracket is in an I-shaped shape and can be inserted into the cavity formed by the side grate block and the support beam. The side grate block and the support beam form a side grate block card slot that can fix the up and down positions of the grate cover plate bracket. The grate cover plate bracket is provided with a clamping plate that cooperates with the rib plate on the lower side of the side grate block to position the installation of the grate cover plate bracket. There are two hooks on the grate cover plate bracket with directions opposite to the waste advancing direction, and the hooks are installed in cooperation with the through holes on the middle grate cover plate rib plates.

[0024] There is a single-sided fixed L-shaped stainless steel plate between the side grate block and the grate support beam. The fixing holes are shared with the side grate block, which can prevent the leachate from leaking and corroding the grate.

[0025] After the overall combination and fixation, an expansion joint type grate block is formed and leads directly to the air-cooled beam. The internal voids of the grate block and the cavity formed by the stainless steel can allow the cooling air to pass through and play a cooling effect.

[0026] The installation method of the present invention is to first install the single-sided fixed stainless steel plate 110, then fix one side of the middle side grate block 102 to the side support beam 101, then insert the grate cover plate bracket 104 into the inner side of the middle side grate block 102, and be positioned and limited by the clamping plate 105 on the bracket. Then install the other side of the middle side grate block 102 and fix it to complete the subsequent assembly of the middle grate cover plate 107. Just slide the grate cover plate hole 108 into alignment with the bracket hook 106 to complete the installation.

[0027] The implementation effect of the present invention after experiments:

[0028]

Claims

1. A grate block structure for a domestic waste incinerator grate, characterized in that, several grate block structures with the same size are assembled between each column of grate modules in the grate block structure; the grate block structure includes side grate blocks and an intermediate grate cover plate; the side grate blocks are L-shaped in cross-section, the inner side of the side grate blocks is fixed to the inner side of the grate support beam by bolts, and the top surface forms a cavity with the support beam; a rib plate is provided on the lower side of the side grate blocks to form a card slot with the support beam, and a side grate block rib plate is provided on the upper side of the side grate blocks. After symmetric assembly, the two side grate block rib plates form a side grate block card slot; It further includes a grate cover plate bracket. The bottom of the grate cover plate bracket is I-shaped and can be inserted into the cavity formed by the side grate blocks and the support beam. The side grate blocks and the support beam form a side grate block card slot to fix the up and down positions of the grate cover plate bracket.

2. The grate block structure for a domestic waste incinerator grate according to claim 1, characterized in that, the outer side of the intermediate grate cover plate is semi-cylindrical.

3. The grate block structure for a domestic waste incinerator grate according to claim 1, characterized in that, two intermediate grate cover plate rib plates are provided on the inner side of the intermediate grate cover plate, and through holes are provided on each intermediate grate cover plate rib plate.

4. The grate block structure for a domestic waste incinerator grate according to claim 1, characterized in that, the grate cover plate bracket is provided with a clamping plate to cooperate with the rib plate on the lower side of the side grate block to position the installation of the grate cover plate bracket.

5. The grate block structure for a domestic waste incinerator grate according to claim 1, characterized in that, two hooks are provided on the grate cover plate bracket, the directions of the hooks are opposite to the direction of garbage advancement, and the hooks are installed in cooperation with the through holes on the intermediate grate cover plate rib plate.

6. The grate block structure for a domestic waste incinerator grate according to claim 1, characterized in that, a single-sided fixed L-shaped stainless steel plate is provided at the gap between the side grate blocks and the grate support beam, which can prevent the leakage of leachate from corroding the fixing holes of the grate and sharing the same with the side grate blocks.

7. The grate block structure for a domestic waste incinerator grate according to claim 1, characterized in that, after the overall combination and fixation of the grate block structure, an expansion joint type grate block is formed and directly leads to the air-cooled beam. The internal voids of the grate block and the cavity formed by the stainless steel allow the cooling air to pass through to achieve a cooling effect.

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