High-temperature dust removal equipment nested dust discharge structure and dust discharge method

Abstract

The application discloses a nested dust discharging structure and a dust discharging method for a high-temperature dust removal device. The structure comprises a nested dust hopper structure, at least comprising an inner dust hopper and an outer dust hopper which are nested in the high-temperature dust removal device, an inner dust flow cavity which is axially through is arranged in the inner dust hopper, and an annular space between the inner dust hopper and the outer dust hopper forms an outer dust flow cavity. The cooling frame structure comprises an inner cooling medium pipe and an outer cooling medium pipe which are arranged in a frame mode in the high-temperature dust removal device, the inner cooling medium pipe cools and supports the inner dust hopper, the outer cooling medium pipe cools and supports the outer dust hopper, and the cooling medium in the inner cooling medium pipe and the outer cooling medium pipe flows in a whole body from bottom to top. The application does not need to separately arrange a support structure of the nested dust hopper structure, effectively overcomes high temperature in the device, realizes combination of support and dust discharging, has a simple overall structure, and provides a powerful condition for safe operation of the device.

Description

Technical Field

[0001] This invention relates to the field of flue dust removal and waste heat recovery technology in converter steelmaking, and particularly to a nested ash discharge structure and ash discharge method within a high-temperature dust removal device. Background Technology

[0002] The flue gas produced by converter oxygen blowing steelmaking is characterized by high temperature, large volume, high dust content, and very fine dust particles. Flue gas purification and cooling are essential processes in the coal gas recovery process. Because converter steelmaking is an intermittent, cyclical operation, not only does the flue gas volume fluctuate cyclically throughout the entire smelting cycle, but the flue gas temperature also fluctuates cyclically. For the ash hopper and ash chute located within the flue gas, the metal wall temperature also exhibits cyclical changes, ranging from 800-900 degrees Celsius to tens of degrees Celsius.

[0003] An existing technology provides an online cooling device for dust collectors in high-temperature dust removal equipment. A dust hopper is located below the dust collector, and cooling pipes are installed inside the hopper. Both the cooling water inlet and outlet of the cooling pipes extend outside the hopper shell. This device has cooling water pipes installed outside the hopper, solely for cooling the high-temperature dust and recovering hot water; the hopper requires separate support.

[0004] Therefore, based on years of experience and practice in related industries, the inventor proposes a nested ash discharge structure and ash discharge method for high-temperature dust removal equipment to overcome the defects of the prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a nested ash discharge structure and ash discharge method for a high-temperature dust removal device. This invention eliminates the need for a separate support structure for the nested ash hopper structure, effectively overcomes the high temperature inside the device, achieves a combination of support and ash discharge, has a simple overall structure, and provides strong conditions for the safe operation of the device.

[0006] The objective of this invention is achieved by providing a nested ash discharge structure within a high-temperature dust removal device, comprising:

[0007] The nested ash hopper structure includes at least an inner ash hopper and an outer ash hopper nested within a high-temperature dust removal device. The inner ash hopper has an axially penetrating inner ash flow cavity, and the annular space between the inner ash hopper and the outer ash hopper forms the outer ash flow cavity.

[0008] The cooling frame structure includes an inner cooling medium pipe and an outer cooling medium pipe arranged in a frame-like manner within the high-temperature dust removal equipment. The inner cooling medium pipe cools and supports the inner ash hopper, and the outer cooling medium pipe cools and supports the outer ash hopper. The overall flow direction of the cooling medium in the inner and outer cooling medium pipes is arranged from bottom to top.

[0009] In a preferred embodiment of the present invention, a sealing structure is provided between the external cooling medium pipe and the external ash hopper.

[0010] In a preferred embodiment of the present invention, a first support block is provided on the outer wall of the inner cooling medium pipe, and the inner ash hopper is supported on the first support block.

[0011] In a preferred embodiment of the present invention, the first support block is a circular rib or a semi-circular rib.

[0012] In a preferred embodiment of the present invention, a second support block is provided on the outer wall of the external cooling medium pipe, and the external ash hopper is supported on the second support block.

[0013] In a preferred embodiment of the present invention, the second support block is a circular rib or a semi-circular rib.

[0014] In a preferred embodiment of the present invention, the cooling medium in the inner cooling medium pipe and the outer cooling medium pipe is a gaseous cooling medium or a liquid cooling medium.

[0015] In a preferred embodiment of the present invention, anti-wear plates are provided on the outer walls of the inner cooling medium pipe and the outer cooling medium pipe.

[0016] In a preferred embodiment of the present invention, the inner cooling medium pipe is symmetrically arranged relative to the inner ash hopper; the outer cooling medium pipe is symmetrically arranged relative to the outer ash hopper.

[0017] In a preferred embodiment of the present invention, reinforcing ribs are provided on the outer walls of the inner cooling medium pipe and the outer cooling medium pipe.

[0018] The objective of this invention can also be achieved as follows: a method for ash discharge within a high-temperature dust removal device includes: a nested ash discharge structure for the high-temperature dust removal device is provided below the multi-layer dust removal unit within the high-temperature dust removal device; cooling medium is continuously filled into the inner cooling medium pipe and the outer cooling medium pipe, and the cooling medium flows from bottom to top; the inner cooling medium pipe provides cooling support for the inner ash hopper, and the outer cooling medium pipe provides cooling support for the outer ash hopper; the ash flow from the inner dust removal unit in the multi-layer dust removal unit flows into the inner ash flow cavity, and the ash flow from the outer dust removal unit flows into the outer ash flow cavity; the ash flow flows downward to the bottom of the outer ash hopper.

[0019] As described above, the nested ash discharge structure and ash discharge method within the high-temperature dust removal equipment of the present invention have the following beneficial effects:

[0020] In this invention, the cooling frame structure formed by the cooling medium pipe ensures the support strength of the nested ash hopper structure and increases the amount of waste heat recovery; each ash hopper of the nested ash hopper structure corresponds to a layer of dust removal structure, ensuring smooth ash falling from each layer of dust removal structure, avoiding air leakage between multiple layers of dust removal structure, and ensuring dust removal efficiency.

[0021] This invention eliminates the need for a separate support structure for the nested ash hopper, effectively overcoming the high temperature inside the equipment, achieving a combination of support and ash discharge, and featuring a simple overall structure, providing strong conditions for the safe operation of the equipment. Attached Figure Description

[0022] The accompanying drawings are intended only to illustrate and explain the present invention and do not limit the scope of the invention.

[0023] in:

[0024] Figure 1 : This is a schematic diagram of the nested ash discharge structure inside the high-temperature dust removal equipment of the present invention.

[0025] In the picture:

[0026] 1. Nested ash hopper structure;

[0027] 11. Inner ash hopper; 110. Inner ash flow cavity;

[0028] 12. External ash hopper; 120. External ash flow cavity;

[0029] 13. Observation hole;

[0030] 2. Cooling frame structure;

[0031] 21. Internal cooling medium pipe; 22. External cooling medium pipe;

[0032] 3. Sealed structure;

[0033] 41. First support block; 42. Second support block. Detailed Implementation

[0034] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0035] The specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on the invention, all of which should be considered within the scope of the invention. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "linked" should be interpreted broadly; for example, they can refer to mechanical or electrical connections, or internal communication between two elements, and can be direct or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] like Figure 1 As shown, the present invention provides a nested ash discharge structure within a high-temperature dust removal device, comprising:

[0038] The nested ash hopper structure 1 includes at least an inner ash hopper 11 and an outer ash hopper 12 nested within a high-temperature dust removal device. An axially penetrating inner ash flow cavity 110 is provided within the inner ash hopper 11, and an annular space between the inner ash hopper 11 and the outer ash hopper 12 forms an outer ash flow cavity 120. Ash from the outer dust removal structure flows downwards through the outer ash flow cavity 120 to the bottom of the outer ash hopper 12, while ash from the inner dust removal structure flows downwards into the inner ash flow cavity 110, ultimately merging with the ash collected in the outer ash hopper and being discharged from the dust removal device. The nested ash hopper structure 1 can be a double-layer nested structure or a multi-layer nested structure.

[0039] The cooling frame structure 2 includes an inner cooling medium pipe 21 and an outer cooling medium pipe 22, which are arranged in a frame-like manner within the high-temperature dust removal equipment. The inner cooling medium pipe 21 cools and supports the inner ash hopper 11, and the outer cooling medium pipe 22 cools and supports the outer ash hopper 12. The overall flow direction of the cooling medium in the inner cooling medium pipe 21 and the outer cooling medium pipe 22 is from bottom to top, creating conditions for natural circulation of the cooling medium. The cooling frame structure 2, with its circulating cooling medium, can effectively reduce deformation caused by high temperatures and reduce the impact of the high-temperature environment on the support (cooling frame structure 2), thus ensuring the strength of the support.

[0040] The inner ash hopper 11 has a bowl-shaped structure. The inner ash hopper 11 can be equipped with a fluidizing device for ash (outer ash section and inner ash section), which fully considers the balance of flue gas resistance, so as to achieve the effect of both ash collection and effective prevention of flue gas "short circuit".

[0041] For multi-layer dust collection structures in high-temperature dust removal equipment (existing technology), in addition to ensuring smooth ash flow in each layer, cross-flow between layers should also be avoided to guarantee dust removal efficiency. In the inner layer dust collection structure, ash flows downwards into the inner ash hopper 11, while the cooling medium in the inner cooling medium pipe 21 flows upwards. The cooling frame formed by the inner cooling medium pipe 21 ensures the support strength for the inner ash hopper 11 and increases waste heat recovery. In the outer layer dust collection structure, ash flows downwards into the outer ash hopper 12, while the cooling medium in the outer cooling medium pipe 22 flows upwards. The cooling frame formed by the outer cooling medium pipe 22 ensures the support strength for the outer ash hopper 12 and increases waste heat recovery.

[0042] The high-temperature dust removal equipment of the present invention features a nested ash discharge structure. The cooling frame structure formed by the cooling medium pipe ensures the support strength of the nested ash hopper structure and increases the amount of waste heat recovery. Each ash hopper of the nested ash hopper structure corresponds to a layer of dust removal structure, ensuring smooth ash discharge from each layer of dust removal structure, avoiding air leakage between multiple layers of dust removal structure, and ensuring dust removal efficiency.

[0043] The nested ash discharge structure inside the high-temperature dust removal equipment of the present invention eliminates the need for a separate support structure for the nested ash hopper structure, effectively overcoming the high temperature inside the equipment, achieving a combination of support and ash discharge, with a simple overall structure, providing strong conditions for the safe operation of the equipment.

[0044] Furthermore, such as Figure 1 As shown, a sealing structure 3 is provided between the external cooling medium pipe 22 and the external ash hopper 12, which can absorb the different thermal expansion between the two structures (external cooling medium pipe and external ash hopper) after heating, and also prevent flue gas short circuit. In a specific embodiment of the present invention, the sealing structure 3 is a sealing plate.

[0045] Furthermore, such as Figure 1As shown, a first support block 41 is provided on the outer wall of the inner cooling medium pipe 21, and the inner ash hopper 11 is supported on the first support block 41.

[0046] In a specific embodiment of the present invention, the first support block 41 is a circular rib, a semi-circular rib, or other shapes.

[0047] Considering the different thermal expansion of the inner ash hopper 11 and the inner cooling medium pipe 21, when the inner ash hopper 11 is installed in a cold state, it is welded to the first support block 41 (rooting structure) of the inner cooling medium pipe 21. It is required that there be a gap between the inner ash hopper 11 and the lower header and the lower header support (existing technology) to absorb the different thermal expansion.

[0048] Furthermore, such as Figure 1 As shown, a second support block 42 is provided on the outer wall of the external cooling medium pipe 22, and the external ash hopper 12 is supported on the second support block 42.

[0049] In a specific embodiment of the present invention, the second support block 42 is a circular rib or a semi-circular rib.

[0050] The outer ash hopper 12 and the second support block 42 rooted on the outer cooling medium pipe 22 can be welded (considering thermal expansion, there can only be one welding point), or they can be left unwelded.

[0051] Furthermore, the cooling medium in the inner cooling medium pipe 21 and the outer cooling medium pipe 22 is a gaseous cooling medium or a liquid cooling medium, or other cooling media may be used.

[0052] Furthermore, anti-wear plates may be provided on the outer walls of the inner cooling medium pipe 21 and the outer cooling medium pipe 22, or they may not be provided, depending on the actual working conditions.

[0053] Furthermore, the inner cooling medium pipe 21 is symmetrically arranged relative to the inner ash hopper 11; the outer cooling medium pipe 22 is symmetrically arranged relative to the outer ash hopper 12. The total number of cooling pipes (inner cooling medium pipe 21 and outer cooling medium pipe 22) can be odd or even.

[0054] Furthermore, reinforcing ribs are provided on the outer walls of the inner cooling medium pipe 21 and the outer cooling medium pipe 22.

[0055] Furthermore, wear-resistant protection can be provided on the windward side of the inner cooling medium pipe 21 and the outer cooling medium pipe 22.

[0056] Furthermore, such as Figure 1 As shown, an observation hole 13 is provided on the top of the inner ash hopper 11. In addition to being used to observe the internal condition of the inner ash hopper 11 during maintenance, the observation hole 13 is also used to clean up large ash clumps during maintenance.

[0057] The present invention also provides a method for ash discharge in a high-temperature dust removal device, comprising: a nested ash discharge structure for the high-temperature dust removal device is provided below the multi-layer dust removal unit in the high-temperature dust removal device; cooling medium is continuously filled into the inner cooling medium pipe 21 and the outer cooling medium pipe 22, and the cooling medium flows from bottom to top; the inner cooling medium pipe 21 provides cooling support for the inner ash hopper 11, and the outer cooling medium pipe 22 provides cooling support for the outer ash hopper 12; the ash flow of the inner dust removal unit in the multi-layer dust removal unit flows to the inner ash flow cavity, the ash flow of the outer dust removal unit flows to the outer ash flow cavity, and the ash flow flows downward to the bottom of the outer ash hopper.

[0058] As described above, the nested ash discharge structure and ash discharge method within the high-temperature dust removal equipment of the present invention have the following beneficial effects:

[0059] In this invention, the cooling frame structure formed by the cooling medium pipe ensures the support strength of the nested ash hopper structure and increases the amount of waste heat recovery; each ash hopper of the nested ash hopper structure corresponds to a layer of dust removal structure, ensuring smooth ash falling from each layer of dust removal structure, avoiding air leakage between multiple layers of dust removal structure, and ensuring dust removal efficiency.

[0060] This invention eliminates the need for a separate support structure for the nested ash hopper, effectively overcoming the high temperature inside the equipment, achieving a combination of support and ash discharge, and featuring a simple overall structure, providing strong conditions for the safe operation of the equipment.

[0061] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A nested dust discharging structure in a high temperature dust removal equipment, characterized in that, include, The nested ash hopper structure includes at least an inner ash hopper and an outer ash hopper nested within a high-temperature dust removal device. The inner ash hopper has an axially penetrating inner ash flow cavity, and the annular space between the inner ash hopper and the outer ash hopper forms the outer ash flow cavity. The cooling frame structure includes an inner cooling medium pipe and an outer cooling medium pipe arranged in a frame-like manner within the high-temperature dust removal equipment. The inner cooling medium pipe cools and supports the inner ash hopper, and the outer cooling medium pipe cools and supports the outer ash hopper. The overall flow direction of the cooling medium in the inner and outer cooling medium pipes is arranged from bottom to top. The ash from the inner dust removal structure flows downwards into the inner ash hopper, while the cooling medium in the inner cooling medium pipe flows upwards. The cooling frame formed by the inner cooling medium pipe ensures the support strength of the inner ash hopper and increases the amount of waste heat recovery. The ash from the outer dust removal structure flows downwards into the outer ash hopper, while the cooling medium in the outer cooling medium pipe flows upwards. The cooling frame formed by the outer cooling medium pipe ensures the support strength of the outer ash hopper and increases the amount of waste heat recovery. A sealing structure is provided between the external cooling medium pipe and the external ash hopper.

2. The nested dust discharge structure in the high-temperature dust removal equipment according to claim 1, characterized in that, The outer wall of the inner cooling medium pipe is provided with a first support block, and the inner ash hopper is supported on the first support block.

3. The nested dust discharge structure of the high-temperature dust removal equipment according to claim 2, characterized in that, The first support block is a circular rib or a semi-circular rib.

4. The nested dust discharge structure of the high-temperature dust removal equipment according to claim 1, characterized in that, A second support block is provided on the outer wall of the external cooling medium pipe, and the external ash hopper support is mounted on the second support block.

5. The nested dust discharge structure of the high-temperature dust removal equipment according to claim 4, characterized in that, The second support block is a circular rib or a semi-circular rib.

6. The nested dust discharge structure of the high-temperature dust removal equipment according to claim 1, characterized in that, The cooling medium in the inner cooling medium pipe and the outer cooling medium pipe is either a gaseous cooling medium or a liquid cooling medium.

7. The nested dust discharge structure of the high-temperature dust removal equipment according to claim 1, characterized in that, Anti-wear plates are provided on the outer walls of the inner cooling medium pipe and the outer cooling medium pipe.

8. The nested dust discharge structure of the high-temperature dust removal equipment according to claim 1, characterized in that, The inner cooling medium pipe is symmetrically arranged relative to the inner ash hopper; the outer cooling medium pipe is symmetrically arranged relative to the outer ash hopper.

9. The nested dust discharge structure of the high-temperature dust removal equipment according to claim 1, characterized in that, Reinforcing ribs are provided on the outer walls of the inner cooling medium pipe and the outer cooling medium pipe.

10. A method of dust discharge in a high-temperature dust removal apparatus, characterized by, The high-temperature dust removal equipment includes a nested ash discharge structure as described in any one of claims 1 to 9, located below the multi-layer dust removal unit. Cooling medium is continuously supplied to the inner and outer cooling medium pipes, and the cooling medium flows from bottom to top. The inner cooling medium pipe provides cooling support for the inner ash hopper, and the outer cooling medium pipe provides cooling support for the outer ash hopper. In the multi-layer dust removal unit, the ash flow from the inner dust removal unit flows to the inner ash flow cavity, and the ash flow from the outer dust removal unit flows to the outer ash flow cavity. The ash flow flows downward to the bottom of the outer ash hopper.

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