Coal mine gas oxidation device with high internal sealing performance

Abstract

The utility model relates to a coal mine gas oxidation device with high internal sealing performance, and belongs to the technical field of coal mine gas heat storage oxidation devices. A heat preservation layer is arranged on the inner side of the shell steel plate, a plurality of sets of heat storage chamber partition plates are evenly distributed between the heat preservation layer and the center supporting column, the space between every two adjacent heat storage chamber partition plates is filled with heat storage ceramics, each set of heat storage chamber partition plates comprises two single plates, and an outer ring sealing strip is arranged in a gap defined by the two single plates and the heat preservation layer. An inner ring sealing strip is arranged in a gap defined by the two single plates and the center supporting column, the cross section of the outer ring sealing strip is in a T shape, and the cross section of the inner ring sealing strip is in a T shape or an n shape. According to the internal sealing structure of the coal mine gas oxidation device, the sealing performance between the adjacent heat storage chambers in the coal mine gas heat storage oxidation device can be improved, gas leakage between the adjacent heat storage chambers is greatly reduced, and the oxidation efficiency of the coal mine gas heat storage oxidation device is improved.

Description

Technical Field

[0001] The utility model relates to a coal mine gas oxidation device with high internal sealing performance, belonging to the technical field of coal mine gas regenerative oxidation devices. Background Art

[0002] The regenerative oxidation device is the current mainstream technology for reducing and utilizing ultra-low-concentration coal mine gas. The inside of a circular regenerative oxidation device is usually divided into multiple regenerative chambers, and the regenerative chambers are generally separated by aluminum silicate fiber boards, which has the advantages of simple structure and convenient implementation. However, the aluminum silicate fiber board will shrink after being exposed to high temperature, and the relative shrinkage can reach 3%; after long-term use and shrinkage of the aluminum silicate fiber board, a gap with a width of 1-2 cm will be formed between the aluminum silicate fiber board and the thermal insulation material inside the regenerative oxidation device, seriously affecting the sealing performance between the regenerative chambers, resulting in a significant reduction in the treatment efficiency of the regenerative oxidation device, an increase in the gas concentration in the exhaust gas, and not meeting the environmental protection requirements of such equipment. Therefore, it is necessary to improve the internal sealing structure of the regenerative oxidation device to solve the leakage problem caused by the shrinkage of the aluminum silicate fiber board. Summary of the Invention

[0003] The utility model aims to make up for the deficiencies of the prior art and provides a coal mine gas oxidation device with high internal sealing performance.

[0004] To achieve the above purpose, the utility model is implemented by adopting the following technical scheme:

[0005] A coal mine gas oxidation device with high internal sealing performance includes a shell steel plate and a central support column. A thermal insulation layer is arranged inside the shell steel plate. A number of groups of regenerative chamber partition plates are evenly distributed between the thermal insulation layer and the central support column. Regenerative ceramics are filled between adjacent regenerative chamber partition plates. Each group of regenerative chamber partition plates includes two single plates. An outer ring sealing strip is arranged in the gap formed between the two single plates and the thermal insulation layer; an inner ring sealing strip is arranged in the gap formed between the two single plates and the central support column. The cross-section of the outer ring sealing strip is T-shaped, and the cross-section of the inner ring sealing strip is T-shaped or ∏-shaped (the shape formed by connecting two T-shaped sealing strips).

[0006] Preferably, the upper parts of the outer ring sealing strip and the inner ring sealing strip are aligned with the top of the regenerative chamber partition plate, and the lower parts extend to the bottom end of the regenerative chamber partition plate.

[0007] Preferably, the materials of the outer ring sealing strip and the inner ring sealing strip are silicon carbide or silicon nitride, and the thickness is 4-5 mm.

[0008] Compared with the prior art, the advantages and positive effects of the utility model are as follows:

[0009] The internal sealing structure of the coal mine gas oxidation device provided by the utility model can improve the sealing performance between adjacent regenerators inside the coal mine gas regenerative oxidation device, greatly reduce the gas leakage between adjacent regenerators, and improve the oxidation efficiency of the coal mine gas regenerative oxidation device. Brief Description of the Drawings

[0010] Figure 1 It is a schematic structural diagram of the utility model.

[0011] Figure 2 It is a schematic structural diagram of the outer ring sealing strip.

[0012] Figure 3 and Figure 4 It is a schematic structural diagram of the inner ring sealing strip.

[0013] Each reference numeral is: 1 outer shell steel plate, 2 thermal insulation layer, 3 regenerator partition plate, 4 regenerative ceramics. 5 outer ring sealing strip, 6 central support column, 7 inner ring sealing strip. Detailed Description of the Invention

[0014] In order to more clearly understand the above-mentioned objects, features and advantages of the utility model, the following further describes the utility model with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0015] Many specific details are set forth in the following description in order to fully understand the utility model. However, the utility model can also be implemented in other ways different from those described herein. Therefore, the utility model is not limited by the specific embodiments disclosed in the following specification.

[0016] Embodiment 1

[0017] This embodiment provides the specific structure of the internal high-sealing coal mine gas oxidation device. As Figure 1 shown, the structure of this embodiment is applied to the structure of the upper regenerator of the rotary RTO device. All the parts not specifically described in this embodiment adopt the conventional settings of the rotary RTO device. From the outside, the device structure provided in this embodiment is cylindrical, including a cylindrical outer shell steel plate 1. Inside the outer shell steel plate 1, there is a thermal insulation layer 2. The thermal insulation layer 2 is made of a material with certain elasticity and high temperature resistance, such as aluminosilicate fiber cotton, etc. At the central position of the outer shell steel plate 1, there is a central support column 6. Between the central support column 6 and the thermal insulation layer 2, there are several groups of regenerator partition plates 3. Figure 1As shown in the figure, there are 8 groups of regenerator partition plates 3. Each group of regenerator partition plates 3 divides the interior of the regenerator into 8 spaces with equal size and fan-shaped cross-sections (except at the position of the central support column 6) from the central support column 6 to the insulation layer 2. Each group of regenerator partition plates 3 includes two single plates. An outer ring sealing strip 5 is arranged in the gap formed between the two single plates and the insulation layer 2, as Figure 2 ; an inner ring sealing strip 7 is arranged in the gap formed between the two single plates and the central support column 6, as Figure 3 or Figure 4 . The cross-section of the outer ring sealing strip 5 is T-shaped, and the cross-section of the inner ring sealing strip 7 is T-shaped or ∏-shaped (the shape formed by connecting two T-shaped sealing strips). Both the outer ring sealing strip 5 and the inner ring sealing strip 7 are strip-shaped, with a total length similar to that of the regenerator partition plate 3. The upper part is aligned with the top of the regenerator partition plate 3, and the lower part extends to the bottom end of the regenerator partition plate 3. The outer ring sealing strip 5 and the inner ring sealing strip 7 are made of high-temperature resistant materials such as silicon carbide and silicon nitride; the thickness of the outer ring sealing strip 5 and the inner ring sealing strip 7 is 4 - 5 mm, the total width of the two sides of the T-shaped is 40 - 50 mm, and the total height is 50 mm. As Figure 4 , since the outer diameter of the central support column 6 is small and the distance between adjacent T-shaped sealing strips is small, the sealing strip between the central support column 6 and the regenerator partition plate 3 can also be designed in a form of two connected parts, that is, ∏-shaped. The arc of the connected part needs to adapt to the outside of the central support column 6 to reduce the gap between components and facilitate installation.

[0018] In this embodiment, the central support column 6 and the outer shell steel plate 1 are original components of the rotary RTO. During installation, the two ends of the two single plates of each group of regenerator partition plates 3 respectively abut against the central support column 6 and the insulation layer 2, and then the outer ring sealing strip 5 is inserted downward from top to bottom into the gap formed between the two single plates and the insulation layer 2, and the inner ring sealing strip 7 is inserted into the gap formed between the two single plates and the central support column 6. The insulation layer 2 is selected from elastic materials to facilitate the insertion of the outer ring sealing strip 5 and the inner ring sealing strip 7. After the installation of the outer ring sealing strip 5 and the inner ring sealing strip 7 is completed, the regenerative ceramic 4 granular balls are filled into the space formed between each group of regenerator partition plates 3, and the positions of each regenerator partition plate 3 are fixed. Compared with the traditional structure, after the installation of the outer ring sealing strip 5 and the inner ring sealing strip 7, although the regenerator partition plate 3 shrinks under high-temperature conditions, with the outer ring sealing strip and the inner ring sealing strip 7 sandwiched between the regenerator partition plates 3, the sealing performance between the oxidation device insulation layer 2 and the regenerator partition plate 3, and between the central support column 6 and the regenerator partition plate 3 can still be ensured, ensuring that the treatment efficiency of the gas oxidation device will not decrease after long-term operation.

[0019] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the relevant art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as they do not depart from the technical solution content of the present utility model, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A coal mine gas oxidation device with high internal sealing performance, comprising a shell steel plate and a central support column, characterized in that: A heat-insulating layer is arranged on the inner side of the outer shell steel plate, a plurality of groups of heat storage chamber partition plates are evenly distributed between the heat-insulating layer and the central support column, heat-storage ceramics are filled between adjacent heat storage chamber partition plates, each group of heat storage chamber partition plates comprises two single plates, an outer ring sealing strip is arranged in a gap formed between the two single plates and the heat-insulating layer; an inner ring sealing strip is arranged in a gap between the two single plates and the central support column, the cross section of the outer ring sealing strip is T-shaped, and the cross section of the inner ring sealing strip is T-shaped or ∏-shaped.

2. The internal high-sealing coal mine gas oxidation device according to claim 1 is characterized in that: The upper parts of the outer ring sealing strip and the inner ring sealing strip are aligned with the top of the heat storage chamber partition plate, and the lower parts extend to the bottom end of the heat storage chamber partition plate.

3. The internal high-sealing coal mine gas oxidation device according to claim 1 is characterized in that: The outer ring sealing strip and the inner ring sealing strip are made of silicon carbide or silicon nitride, and have a thickness of 4-5 mm.

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