Reloading type coal mine gas precision filter

Abstract

The utility model relates to a reloading type coal mine gas precision filter which is suitable for filtering gas and comprises a shell, a mounting plate and more than two filter element assemblies, the shell is provided with a gas inlet suitable for allowing gas to be filtered to flow in and a gas outlet suitable for allowing filtered gas to flow out, and the gas inlet is communicated with the gas outlet through a cavity of the shell; the more than two filter element assemblies are arranged in the cavity of the shell through the mounting plate; the more than two filter element assemblies are detachably connected with the mounting plate; each filter element assembly comprises a filter element framework, a first filter layer wrapping the filter element framework, a second filter layer wrapping the first filter layer and a third filter layer wrapping the second filter layer; the shell is provided with a first manhole, and the first manhole is opposite to the two or more filter element assemblies, so that the filter element assemblies can be taken and placed through the first manhole.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mine gas purification, and particularly relates to a replaceable coal mine gas precision filter. BACKGROUND

[0002] Coal mine gas is a mixed gas of coal seam gas and air, which is removed from the air during the mining process due to extraction, ventilation and other processes; the main component of coal mine gas is methane, and its orderly and disorderly emission can cause serious greenhouse effect, which is 25-28 times that of carbon dioxide. Therefore, with the gradual understanding and deepening of coal mine gas, more and more attention is paid to the utilization of coal mine gas, and even the state has introduced various preferential policies to promote the development of coal mine gas utilization technology.

[0003] There are many methods for gas utilization, and according to the existing utilization technology, there are approximately the following utilization methods: gas internal combustion engine power generation utilization, heat accumulation oxidation utilization, purification utilization, high-concentration gas direct combustion utilization, direct combustion utilization, etc. No matter which utilization method is used, the gas needs to be filtered before utilization to remove impurities such as coal slime, dust and even tar. The traditional integral type gas filter often has the problem that the filter screen is difficult to take out and clean after being blocked, which affects the filtering effect, reduces the operation efficiency of the gas utilization system and the utilization rate of the gas, and even affects the power generation capacity and product quality. SUMMARY

[0004] Therefore, the present application provides a replaceable coal mine gas precision filter.

[0005] According to an aspect of the present application, a replaceable coal mine gas precision filter is provided, which is suitable for filtering gas and comprises a shell, a mounting plate and two or more filter core assemblies.

[0006] The shell is provided with an air inlet suitable for flowing into the gas to be filtered and an air outlet suitable for flowing out of the filtered gas, and the air inlet and the air outlet are communicated through the cavity of the shell.

[0007] The two or more filter core assemblies are arranged inside the cavity of the shell and located between the air inlet and the air outlet through the mounting plate.

[0008] The two or more filter core assemblies and the mounting plate are detachably connected.

[0009] Each filter core assembly comprises a filter core skeleton, a first filter layer wrapping the filter core skeleton, a second filter layer wrapping the first filter layer, and a third filter layer wrapping the second filter layer; the gas to be filtered flowing from the air inlet is suitable for flowing through the third filter layer, the second filter layer, the first filter layer and the filter core skeleton in sequence and then flowing out from the air outlet.

[0010] The shell is provided with a first inspection hole, and the first inspection hole is arranged opposite to the two or more filter core assemblies, and is suitable for taking and placing the filter core assemblies through the first inspection hole.

[0011] In a possible implementation, the mounting plate is provided with mounting holes suitable for mounting the filter core assemblies, and the number of the mounting holes is the same as the number of the filter core assemblies.

[0012] In a possible implementation, the filter core framework is provided with a cavity with an open end, and the open end of the filter core framework can be inserted into the mounting hole.

[0013] In a possible implementation, the mounting hole is provided with an elastic ring, and the elastic ring is suitable for sleeving the open end of the filter core framework.

[0014] In a possible implementation, each filter core assembly further comprises a filter core support ring plate, the filter core support ring plate is sleeved with the filter core framework and is fixedly connected with the filter core framework, and the mounting plate is suitable for supporting the filter core support ring plate.

[0015] In a possible implementation, the filtering precision of the first filter layer is less than that of the second filter layer, and the filtering precision of the second filter layer is less than that of the third filter layer.

[0016] In a possible implementation, the materials of the first filter layer, the second filter layer and the third filter layer are all non-woven fabrics.

[0017] In a possible implementation, the first inspection hole and the gas inlet are respectively located on two adjacent sides of the shell.

[0018] In a possible implementation, the shell is provided with a second inspection hole.

[0019] Beneficial effects: The application is suitable for filtering gas before using the gas; the shell is suitable for providing a filtering space for the gas, the mounting plate is suitable for providing a mounting base for the plurality of filter core assemblies, the gas to be filtered entering the shell passes through the filter core assemblies and is filtered by the filter core assemblies, so that impurities such as coal slime, dust and even tar in the gas to be filtered can be effectively removed; after multiple filtering, the gas finally flows out from the gas outlet; the multiple filter layers can effectively ensure the filtering effect of the gas. The application uses a split filter core assembly to replace the traditional integral filter screen, and the filter core assembly is arranged in a replaceable structure; when the impurities on the filter core assembly have accumulated too much to affect the filtering effect or the flow rate of the gas, the filter core assembly is disassembled from the mounting plate; after the clean filter core assembly or the new filter core assembly is reinstalled on the mounting plate, the filtering of the gas is continued, so as to ensure the filtering effect and efficiency of the gas; the replaced filter core assembly can be repeatedly used, effectively controlling the cost of filtering the gas.

[0020] Other features and aspects of the present application will become apparent from a detailed description of exemplary embodiments with reference to the following drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the application and serve to explain the principles of the present application.

[0022] Figure 1 A main structure diagram of a refillable coal mine gas precision filter according to an embodiment of the present application is shown;

[0023] Figure 2 A main structure diagram of a refillable coal mine gas precision filter according to an embodiment of the present application is shown;

[0024] Figure 3 A partial structure diagram of a refillable coal mine gas precision filter according to an embodiment of the present application is shown;

[0025] Figure 4 A sectional view of a refillable coal mine gas precision filter according to an embodiment of the present application is shown;

[0026] Figure 5 A sectional view of a mounting plate according to an embodiment of the present application is shown;

[0027] Figure 6 A perspective line drawing of a refillable coal mine gas precision filter according to an embodiment of the present application is shown;

[0028] Figure 7 A sectional view of a filter assembly according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0029] Various exemplary embodiments, features, and aspects of the present application will be explained in detail below based on the accompanying drawings. Like reference numbers in the drawings indicate functionally similar or identical elements. Although various aspects of the embodiments are illustrated in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0030] It should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the present application or simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0033] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0034] Figure 1 This diagram shows the main structure of the replaceable coal mine gas precision filter according to an embodiment of this application. Figure 2 This diagram shows the main structure of the replaceable coal mine gas precision filter according to an embodiment of this application. Figure 3 This application shows a partial structural diagram of a replaceable precision coal mine gas filter according to an embodiment; as shown. Figure 3 As shown, the replaceable coal mine gas precision filter includes: a housing 100, a mounting plate 200, and two or more filter element assemblies 300; the housing 100 has an inlet 110 for the gas to be filtered to flow in and an outlet 120 for the filtered gas to flow out, and the inlet 110 is connected to the outlet 120 through the cavity of the housing 100; the two or more filter element assemblies 300 are disposed inside the cavity of the housing 100 through the mounting plate 200 and located between the inlet 110 and the outlet 120; One or more filter element assemblies 300 are detachably connected to the mounting plate 200; each filter element assembly 300 includes: a filter element frame 310, a first filter layer 320 surrounding the filter element frame 310, a second filter layer 330 surrounding the first filter layer 320, and a third filter layer 340 surrounding the second filter layer 330; the gas to be filtered flowing in from the air inlet 110 is suitable for flowing through the third filter layer 340, the second filter layer 330, the first filter layer 320 and the filter element frame 310 in sequence and then flowing out from the air outlet 120.

[0035] It needs to be explained here that the present application is applicable to filtering gas before using gas; wherein the shell 100 is applicable to provide a filtering space for gas, the air inlet 110 opened on the shell 100 is applicable to guide the introduction of gas to be filtered, the air outlet 120 opened on the shell 100 is applicable to guide the discharge of filtered gas, and the mounting plate 200 is applicable to provide a mounting base for the plurality of filter core assemblies 300, so as to ensure that the filter core assemblies 300 can be stably placed inside the shell 100. Since the filter core assemblies 300 are arranged inside the cavity of the shell 100 and located between the air inlet 110 and the air outlet 120, the gas to be filtered entering the shell 100 will pass through the filter core assemblies 300 and flow to the air outlet 120 after being filtered by the filter core assemblies 300. Further, the filter core skeleton 310 of the filter core assembly 300 is applicable to support the external three-layer filter layer. The gas to be filtered flows through the filter core skeleton 310, the third filter layer 340, the second filter layer 330, and the first filter layer 320 in sequence, and the impurities in the gas to be filtered, including coal slime, dust, and even tar, etc., can be effectively removed in this process. After multiple filtering, the gas finally flows out from the air outlet 120. The arrangement of the multi-layer filter layer can effectively ensure the filtering effect of the gas.

[0036] Many conventional gas filters are integral filters, and gas passes through an integral filter section for filtering. However, with the increase of use time, the filter screen of the conventional gas filter often appears to be blocked and difficult to clean, which leads to the decrease of the running efficiency of the gas utilization system and the utilization rate of gas. The present application adopts a split filter core assembly 300 instead of the conventional integral filter screen, and the filter core assembly 300 is arranged in a replaceable structure. That is, two or more filter core assemblies 300 are detachably connected with the mounting plate 200. When the impurities on the first filter layer 320, the second filter layer 330, and the third filter layer 340 are accumulated too much to affect the filtering effect or the flow rate of gas, the filter core assembly 300 is detached from the mounting plate 200, so as to clean the filter core assembly 300 as a whole. After the cleaned filter core assembly 300 or a new filter core assembly 300 is reinstalled on the mounting plate 200, the filtering work of gas is continued, so as to ensure the filtering effect and efficiency of gas. The replaced filter core assembly 300 can be repeatedly used, which effectively controls the cost of filtering gas.

[0037] In a possible implementation manner, as shown in Figure 2 The main body of the shell 100 is in a cylindrical structure, and the inside thereof is a hollow cavity. The air inlet 110 is opened on the outer side wall of the shell 100, and the air inlet connection pipe 111 is protrusively arranged at the air inlet 110. The air inlet connection pipe 111 can be connected with a pipe outside for conveying gas, so as to facilitate the gas to enter the inside of the shell 100. Similarly, as shown in Figure 1As shown, an exhaust connection pipe 121 is protruding from the exhaust port 120; the exhaust connection pipe 121 can be connected to an external pipe, thereby facilitating the outflow of gas from inside the casing 100.

[0038] Furthermore, the air inlet 110 and the air outlet 120 are located on opposite sides of the housing 100, and the air inlet 110 is positioned higher than the air outlet 120.

[0039] Preferably, the main body of the shell 100 has a cylindrical structure to reduce the difficulty of processing.

[0040] In one possible implementation, such as Figure 4 and Figure 5 As shown, the mounting plate 200 has mounting holes 210 for mounting filter element assemblies 300, and the number of mounting holes 210 is the same as the number of filter element assemblies 300. The main body of the mounting plate 200 is a circular plate structure. The mounting plate 200 matches the end face inside the housing 100. The mounting plate 200 is placed horizontally inside the cavity of the housing 100 to provide a mounting base for the filter element assemblies 300. The mounting plate 200 has two or more mounting holes 210, and each mounting hole 210 can accommodate one filter element assembly 300. Preferably, the two or more mounting holes 210 are evenly arranged.

[0041] Furthermore, the side wall of the mounting plate 200 and the inner side wall of the housing 100 can be fixed together by welding; or a support ring can be provided on the inner side wall of the housing 100, and the mounting plate can be placed on the support ring.

[0042] Preferably, the thickness of the mounting plate 200 is greater than 60mm and less than 100mm.

[0043] In one possible implementation, the filter element frame 310 has a cavity with one open end, and the open end of the filter element frame 310 can be inserted into the mounting hole 210. Further, as... Figure 7 As shown, the main body of the filter element frame 310 is a cylindrical structure with a hollow interior and an open end. The diameter of the end face of the open end of the filter element frame 310 is slightly smaller than the diameter of the mounting hole 210 so that the filter element frame 310 can be inserted into the mounting hole 210.

[0044] Preferably, after the filter element frame 310 is inserted into the mounting hole 210, the gap between the filter element frame 310 and the mounting hole 210 is 0.5-1mm.

[0045] In one possible implementation, such as Figure 7As shown, the mounting hole 210 is fixedly provided with an elastic ring 360, which is suitable for sleeving the open end of the filter core framework 310. It should be noted that, in order to improve the convenience of inserting and pulling out the filter core assembly 300, improve the stability of the filter core assembly 300 in the mounting hole 210, and ensure the sealing between the filter core assembly 300 and the mounting plate 200, the elastic ring 360 is fixedly arranged on the side wall of the mounting hole 210, and the elastic ring 360 is arranged with the mounting hole 210 as the same center. The diameter of the elastic ring 360 in the natural state is less than the diameter of the open end of the filter core framework 310, and the diameter of the elastic ring 360 in the stretched state is greater than the diameter of the open end of the filter core framework 310. The open end of the filter core framework 310 is inserted into the elastic ring 360, and the stability of the filter core framework 310 can be improved under the action of the elastic ring 360.

[0046] Preferably, the material of the elastic ring 360 is elastic rubber.

[0047] In one possible implementation, the open hole rate of the filter core framework 310 is greater than or equal to 80%.

[0048] Preferably, the filter core framework 310 is rolled from a punched mesh plate, or the filter core framework 310 is rolled from a steel mesh plate, and the open hole rate is greater than or equal to 80%, and the outer surface is relatively smooth, which facilitates the sleeving of the first filter layer 320.

[0049] In one possible implementation, each filter core assembly 300 further comprises a filter core support ring plate 350, the filter core support ring plate 350 is sleeved on the filter core framework 310 and fixedly connected with the filter core framework 310, the plane where the filter core support ring plate 350 is located is perpendicular to the length direction of the filter core framework 310, and the mounting plate 200 is suitable for supporting the filter core support ring plate 350. Figure 7 As shown, the main body of the filter core support plate is in the form of an annular sheet, the filter core support ring plate 350 is sleeved on the outer side of the filter core framework 310, when the filter core framework 310 is inserted into the mounting hole 210, the filter core support ring plate 350 contacts the upper surface of the mounting plate 200, and the mounting plate 200 supports the filter core framework 310 through the filter core support ring plate 350, further ensuring the installation stability of the filter core framework 310, and avoiding the filter core framework 310 from falling off from the mounting hole 210.

[0050] Further, the filter core support ring plate 350 is welded with the filter core framework 310 in one piece, and the width of the filter core support ring plate 350 is less than 1 / 2 of the shortest distance between adjacent two filter core assemblies 300, so as to ensure that the plurality of filter core support ring plates 350 will not interfere and stack with each other.

[0051] In a possible implementation, the filtering precision (filter hole diameter) of the first filter layer 320 is smaller than the filtering precision (filter hole diameter) of the second filter layer 330, and the filtering precision (filter hole diameter) of the second filter layer 330 is smaller than the filtering precision (filter hole diameter) of the third filter layer 340. It should be noted that, as shown in Figure 7 the first filter layer 320 is wrapped outside the filter core framework 310, the second filter layer 330 is wrapped outside the first filter layer 320, and the third filter layer 340 is wrapped outside the second filter layer 330. The gas to be filtered enters the shell 100 from the gas inlet 110, is first filtered by the third filter layer 340 to filter and block impurities with a relatively large particle size, is then filtered by the second filter layer 330 to filter and block impurities with a relatively small particle size, is then filtered by the third filter layer 340 to filter and block tiny dust impurities, and finally the filtered gas flows out from the bottom opening of the filter core framework 310.

[0052] Further, the filtering precision of the first filter layer 320 is ≤5 μm. Preferably, the first filter layer 320 is made of glass fiber or non-woven fabric.

[0053] Further, the filtering precision of the second filter layer 330 ranges from 5 μm to ≤10 μm. Preferably, the second filter layer 330 is made of glass fiber or non-woven fabric.

[0054] Further, the filtering precision of the third filter layer 340 ranges from 10 μm to ≤20 μm. Preferably, the third filter layer 340 is made of glass fiber or non-woven fabric.

[0055] Preferably, the first filter layer 320, the second filter layer 330, and the third filter layer 340 are made of the same material, and are made of non-woven fabric or glass fiber.

[0056] In a possible implementation, as shown in Figure 7 the first filter layer 320 is wrapped outside the filter core framework 310, the second filter layer 330 is wrapped outside the first filter layer 320, and the third filter layer 340 is wrapped outside the second filter layer 330. The gas to be filtered enters the shell 100 from the gas inlet 110, is first filtered by the third filter layer 340 to filter and block impurities with a relatively large particle size, is then filtered by the second filter layer 330 to filter and block impurities with a relatively small particle size, is then filtered by the third filter layer 340 to filter and block tiny dust impurities, and finally the filtered gas flows out from the bottom opening of the filter core framework 310.

[0057] In a possible implementation, the shell 100 is provided with a first maintenance hole 130, and the first maintenance hole 130 is oppositely arranged with two or more filter core assemblies 300, which is suitable for taking and placing the filter core assembly 300 through the first maintenance hole 130. As shown in Figure 3As shown, the first manhole 130 is arranged on the top of the shell 100, and the first manhole 130 is in a circular hole structure.

[0058] Preferably, the nominal diameter of the first manhole 130 is greater than or equal to 450 mm.

[0059] In a possible implementation, the first manhole 130 is provided with a first steel pipe nipple 131, a first flange 132, a first flange blind plate 134, and a fastening bolt; as shown in the figure, Figure 1 one end of the first steel pipe nipple 131 is in communication with the first manhole 130, the other end of the first steel pipe nipple 131 is fixedly provided with the first flange 132, the first flange blind plate 134 is arranged between the first flange 132 and the second flange 133; the first flange 132, the first flange blind plate 134, and the second flange 133 are detachably connected through the fastening bolt; when in the normal filtering process, as shown in the figure, Figure 1 the first flange blind plate 134 is installed between the first flange 132 and the second flange 133; when it is necessary to replace the filter element assembly 300 or clean the filter element assembly 300, the first flange blind plate 134 can be detached, as shown in the figure, Figure 3 the first manhole 130 is exposed, and the staff can disassemble the internal filter element assembly 300 through the first manhole 130.

[0060] In a possible implementation, the shell 100 is provided with a second manhole 140. The second manhole 140 is arranged on the side wall of the shell 100 and is located below the air inlet 110. It should be noted that the staff can clean the inner wall of the shell 100 and clean the impurities and dirt at the bottom of the shell 100 through the second manhole 140, so as to keep the shell 100 clean.

[0061] In a possible implementation, as shown in the figure, Figure 2 the second manhole 140 is provided with a second steel pipe nipple 141, a third flange 142, a second flange blind plate 143, and a fastening bolt; one end of the second steel pipe nipple 141 is in communication with the second manhole 140, the other end of the second steel pipe nipple 141 is fixedly provided with the third flange 142, the second flange blind plate 143 is arranged between the third flange 142 and the fourth flange 144; the third flange 142, the second flange blind plate 143, and the fourth flange 144 are detachably connected through the fastening bolt; when in the normal filtering process, the second flange blind plate 143 is installed between the third flange 142 and the fourth flange 144; when it is necessary to clean the inside of the shell 100, the second flange blind plate 143 can be detached, and the second manhole 140 is exposed.

[0062] Having described various embodiments of the application, it is to be understood that the above description is meant not to limit and not to encompass all of the possible embodiments. Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. It is intended that the scope of the application be defined by the scope of the patent and by the claims as allowed by the patent office, which can include adaptations based on the description, equivalents, and / or substitutions of elements individually or collectively to the entire disclosure.

Claims

1. A refillable coal mine gas precision filter suitable for filtering gas, characterized in that, The utility model relates to a filter device, including: A housing, a mounting plate and two or more filter core assemblies; The housing is provided with an air inlet for the inflow of air to be filtered and an air outlet for the outflow of filtered air, and the air inlet is in communication with the air outlet through a cavity in the housing; The two or more filter core assemblies are arranged inside the cavity of the housing between the air inlet and the air outlet through the mounting plate; The two or more filter core assemblies are detachably connected to the mounting plate; Each filter core assembly comprises a filter core framework, a first filter layer wrapped around the filter core framework, a second filter layer wrapped around the first filter layer, and a third filter layer wrapped around the second filter layer; The air to be filtered flowing in from the air inlet is adapted to flow through the third filter layer, the second filter layer, the first filter layer and the filter core framework in sequence before flowing out from the air outlet; The housing is provided with a first access hole opposite the two or more filter core assemblies, which is adapted to facilitate the removal and installation of the filter core assemblies through the first access hole.

2. The refilled coal mine gas filter according to claim 1, wherein, The mounting plate is provided with mounting holes adapted to mount the filter core assemblies, and the number of mounting holes is the same as the number of filter core assemblies.

3. The refilled coal mine gas filter according to claim 2, wherein, The filter core framework has a cavity with an open end, and the open end of the filter core framework can be inserted into the mounting hole.

4. The refilled coal mine gas filter according to claim 3, wherein, A tension ring is arranged in the mounting hole, which is adapted to fit around the open end of the filter core framework.

5. The refilled coal mine gas filter according to claim 1, wherein, Each filter core assembly further comprises a filter core support ring plate, which is fitted around the filter core framework and fixedly connected to the filter core framework, and the mounting plate is adapted to support the filter core support ring plate.

6. The refilled coal mine gas filter according to claim 1, wherein, The filtering precision of the first filter layer is lower than that of the second filter layer, and the filtering precision of the second filter layer is lower than that of the third filter layer.

7. The refilled coal mine gas filter according to claim 6, wherein, The materials of the first filter layer, the second filter layer and the third filter layer are all non-woven fabrics.

8. The refilled coal mine gas filter according to claim 1, wherein, The first access hole and the air inlet are respectively located on two adjacent sides of the housing.

9. The refilled coal mine gas filter according to claim 8, wherein, The housing is provided with a second access hole.

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