Waste gas filter

Abstract

The utility model discloses a waste gas filter which comprises a shell, an air inlet, an air outlet, a plurality of filter plates and a gas cleaning module, the air outlet is formed in the top of the shell; the plurality of filter plates are positioned in the shell, are vertically arranged and are parallel to one another; at least one part of the gas cleaning module is located in the top area of the interior of the shell, and the gas cleaning module is used for reversely blowing the multiple filter plates through compressed air. According to the waste gas filter disclosed by the utility model, firstly, the plurality of filter plates are vertically arranged in the shell, so that the waste gas filter has the advantages of large filter area, small occupied area, high filter precision and the like; and secondly, as the gas cleaning module is arranged to utilize compressed air to reversely blow the filter plate, sediments on the surface of the filter plate can be cleaned in time in the filtering and waste discharging process, the operation can be carried out without waiting for the end of production and thorough cooling, and the device has the advantages of convenience, rapidness, labor saving, resource saving and the like.

Description

Technical Field

[0001] The utility model relates to the field of filters, in particular to an exhaust gas filter. Background Art

[0002] In chemical product production scenarios, exhaust gas filters are usually used to filter particulate matter in the exhaust gas. Figure 1 As shown, the existing exhaust gas filter has a housing S, and a filter plate L is arranged inside the housing. The exhaust gas G to be filtered containing particles such as oil, stone powder, rubber powder, and thickener (indicated by small circles in the figure) flows in from the bottom of the exhaust gas filter, and most of the particles such as oil, stone powder, rubber powder, and thickener are intercepted by the filter plate L, and the filtered exhaust gas G' flows out from the top of the exhaust gas filter. Among them, the filter plate is usually a filter plate with a certain amount of stainless steel wire sandwiched between two layers of perforated plates. If the stainless steel wire is ideally evenly laid, its filtration accuracy is about 20 meshes, but it is actually difficult to lay it flat.

[0003] The existing waste gas filter has a relatively small filtering area, so the density of the filter plate cannot be too high, resulting in low filtering accuracy of the filter. After a period of use, a large amount of particulate matter adheres to the surface of the filter plate and the resistance becomes larger, resulting in a decrease in filtering efficiency. When the filter plate is seriously blocked, it needs to be replaced with a new filter plate or cleaned and then reinstalled. Frequent replacement or cleaning will increase the labor intensity of the workers. In addition, after the filter plate is taken out, the filtered material on the surface of the filter plate will solidify with factors such as cooling, and the cleaning process will be more complicated. If it is not replaced or cleaned in time, the waste gas will be accompanied by unfiltered stone powder, rubber powder, thickener and other particles when entering the reaction container such as the regenerative thermal incinerator RTO used in the subsequent process. It is easy to adhere to the thermal storage ceramics, which is easy to block the holes of the thermal storage ceramics and seriously affect the working effect of the RTO. In order to clean the stone powder, rubber powder, thickener and other particles on the surface of the thermal storage ceramics, a large amount of natural gas needs to be used to burn the RTO at high temperature. Therefore, the waste gas filter in the prior art has the disadvantages of low accuracy and inconvenient cleaning. Utility Model Content

[0004] In view of this, the utility model proposes an exhaust gas filter that can solve the above existing technical problems. The utility model provides the following technical solutions:

[0005] An exhaust gas filter comprises a shell, an air inlet, an air outlet, a plurality of filter plates, and a gas cleaning module, wherein: the air inlet is arranged at the bottom of the shell; the air outlet is arranged at the top of the shell; the plurality of filter plates are all located inside the shell, and the plurality of filter plates are arranged vertically and parallel to each other; at least a part of the gas cleaning module is located in the top area inside the shell, and the gas cleaning module is used to use compressed air to back-blow the plurality of filter plates.

[0006] Optionally, the gas cleaning module includes: an air duct, a control valve and a plurality of compressed air blowing ports, wherein the air duct is connected to the plurality of compressed air blowing ports, and the air duct is also connected to a high-pressure air bag arranged outside the shell; the control valve is used to control the opening and closing of the compressed air blowing ports; the plurality of compressed air blowing ports are located inside the shell, and the openings of the plurality of compressed air blowing ports face downward and are aligned with the gaps between the plurality of filter plates.

[0007] Optionally, the control valve is an electromagnetic pulse valve.

[0008] Optionally, the pressure of the high-pressure air bag is greater than 0.3 MPa to 0.7 MPa.

[0009] Optionally, the number of the filter plates is 4 to 7.

[0010] Optionally, the filtering accuracy of the filter plate is 50 mesh to 150 mesh.

[0011] Optionally, each of the filter plates is composed of a single-layer stainless steel wire mesh with 5 to 20 meshes on both sides and a single-layer stainless steel wire mesh with 40 to 150 meshes in the inner core.

[0012] Optionally, the air inlet includes: an air inlet column portion and an air inlet flange located below the air inlet column portion; the air outlet includes: an air outlet column portion and an air outlet flange located above the air outlet column portion.

[0013] Optionally, it also includes: a thermocouple arranged on the air outlet column, and the thermocouple is used to detect the temperature of the air outlet.

[0014] According to the technical solution of the utility model, on the first hand, since a plurality of filter plates are vertically arranged in the shell, it has the advantages of large filtering area, small footprint, high filtering accuracy, etc.; on the second hand, since a gas cleaning module is provided to utilize compressed air to back-blow the filter plate, the sediment on the surface of the filter plate can be cleaned in time during the filtering and waste discharge process, and it can be executed without waiting for the end of production and thorough cooling, which has the advantages of convenience, speed, labor saving, and resource saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] For the purpose of illustration and not limitation, the present invention will now be described according to its preferred embodiments, in particular with reference to the accompanying drawings, in which:

[0016] Figure 1 is a schematic diagram of the working process of the exhaust gas filter of the prior art;

[0017] Figure 2 It is a schematic structural diagram of an exhaust gas filter according to an embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the process of filtering exhaust gas by the exhaust gas filter according to the embodiment of the utility model;

[0019] Figure 4 It is a schematic diagram of the process of cleaning the filter plate of the exhaust gas filter according to the embodiment of the utility model.

[0020] In the figure: 100, exhaust gas filter; 1, shell; 2, air inlet; 21, air inlet column; 22, air inlet flange; 3, air outlet; 31, air outlet column; 32, air outlet flange; 4, filter plate; 5, gas cleaning module; 51, air duct; 52, control valve; 53, compressed air blowing port; 6, high-pressure air bag; 7, thermocouple. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms such as "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figure 2 As shown, the exhaust gas filter 100 of the embodiment of the utility model mainly includes a housing 1, an air inlet 2, an air outlet 3, a plurality of filter plates 4 and a gas cleaning module 5.

[0025] The air inlet 2 is arranged at the bottom of the housing 1. The air inlet 2 may specifically include: an air inlet column 21 and an air inlet flange 22 located below the air inlet column 21. The air inlet flange 22 may be used for flange connection with a reaction vessel (eg, an asphalt reactor) of a previous process step.

[0026] The air outlet 3 is arranged at the top of the housing 1. The air outlet 3 may specifically include: an air outlet column 31 and an air outlet flange 32 located on the air outlet column 31. The air outlet flange 32 may be used for flange connection with a reaction vessel (such as an asphalt reactor regenerative thermal incinerator) in a subsequent process step.

[0027] Multiple filter plates 4 are all located inside the housing 1, and the multiple filter plates 4 are arranged vertically and parallel to each other. The number of filter plates 4 can be 4 to 7, preferably 5 to 6. Since the multiple filter plates 4 are arranged vertically and in parallel, the resistance is smaller than that of the existing single filter plate arranged horizontally, so a filter plate with higher filtering accuracy can be used. The filtering accuracy of the filter plate 4 can be 50 mesh to 150 mesh. The filter plate 4 can be composed of a single-layer stainless steel wire mesh with 5 mesh to 20 mesh on both sides and a single-layer stainless steel wire mesh with 40 mesh to 150 mesh in the inner core. For example, each filter plate can be composed of a single-layer stainless steel wire mesh with 10 mesh and a single-layer stainless steel wire mesh with 60 mesh, so as to achieve a filtering effect with a comprehensive filtering accuracy of about 100 mesh.

[0028] At least a part of the gas cleaning module 5 is located in the top area inside the shell 1, and the gas cleaning module 5 is used to back-blow multiple filter plates 4 using compressed air. The gas cleaning module 5 may specifically include: an air duct 51, a control valve 52, and multiple compressed air blowing ports 53. The air duct 51 is connected to the multiple compressed air blowing ports 53. The air duct 51 is also connected to a high-pressure air bag 6 arranged outside the shell, and the pressure of the high-pressure air bag 6 is 0.3MPa to 0.7MPa. The control valve 52 is used to control the opening and closing of the compressed air blowing port 53, and an electromagnetic pulse valve can be specifically selected. The electromagnetic pulse valve can set the opening amplitude, opening interval, and opening circuit of the electromagnetic pulse valve through the control box, so an electromagnetic pulse valve is used. Multiple compressed air blowing ports 53 are located inside the shell 1, and the openings of the multiple compressed air blowing ports 53 are downward and aligned with the gaps between the multiple filter plates 4.

[0029] The exhaust gas filter 100 of the embodiment of the utility model may further include a thermocouple 7 arranged at the air outlet column part 31, and the thermocouple 7 is used to detect the temperature of the air outlet 3, and then can be combined with other elements to realize linkage control.

[0030] The working process of the exhaust gas filter 100 according to the embodiment of the utility model is described in detail as follows:

[0031] First, if Figure 3As shown, the exhaust filter 100 is used to filter particulate matter in the exhaust gas. The exhaust gas G1 containing particulate matter to be filtered flows in from the air inlet 2 at the bottom of the exhaust filter, most of the particulate matter is intercepted by the filter plate 4, and the filtered exhaust gas G2 flows out from the air outlet 3 at the top of the exhaust filter. After filtering for a period of time, the resistance increases after the particles adhere to the surface of the filter plate 4, resulting in a decrease in the filtering effect.

[0032] Secondly, if Figure 4 As shown, after a period of operation, the exhaust gas filter 100 is backwashed and cleaned. The start control valve 52 is triggered manually or automatically at a fixed time, and the compressed air in the high-pressure air bag 6 is transported to the compressed air blowing port 53 through the air duct and then released instantly between the filter plates 4. G3 in the figure indicates that the released compressed air impacts the surface of the filter plate 4 and flows through the filter plate 4 and then reaches the bottom of the exhaust gas filter 100. At this time, the particles such as oil, stone powder, rubber powder, and thickener adhering to the surface of the filter plate 4 are blown away from the surface of the filter plate by the air flow, and then fall into the batching kettle (if any) below and are stirred, thus realizing the recycling of materials.

[0033] According to the structure of the exhaust gas filter of the utility model, on the first hand, since a plurality of filter plates are vertically arranged in the shell, it has the advantages of large filtering area, small footprint, high filtering accuracy, etc.; on the second hand, since a gas cleaning module is provided to utilize compressed air to back-blow the filter plate, the sediment on the surface of the filter plate can be cleaned in time during the filtering and waste discharge process, and it can be executed without waiting for the end of production and thorough cooling, which has the advantages of convenience, speed, labor saving, and resource saving.

[0034] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An exhaust gas filter, characterized in that: It includes a shell, an air inlet, an air outlet, a plurality of filter plates, and a gas cleaning module, wherein: The air inlet is arranged at the bottom of the housing; The air outlet is arranged at the top of the housing; The multiple filter plates are all located inside the housing, and the multiple filter plates are vertically arranged and parallel to each other; At least a portion of the gas cleaning module is located in a top area of ​​the interior of the housing, and the gas cleaning module is used to back-blow the plurality of filter plates using compressed air.

2. The exhaust gas filter according to claim 1, characterized in that The gas cleaning module comprises: an air duct, a control valve and a plurality of compressed air blowing ports, wherein: The air duct is connected to a plurality of compressed air blowing ports, and the air duct is also connected to a high-pressure air bag arranged outside the shell; The control valve is used to control the opening and closing of the compressed air blowing port; The plurality of compressed air blowing ports are located inside the shell, and the openings of the plurality of compressed air blowing ports face downward and are aligned with the gaps between the plurality of filter plates.

3. The exhaust gas filter according to claim 2, characterized in that The control valve is an electromagnetic pulse valve.

4. The exhaust gas filter according to claim 2, characterized in that The pressure of the high-pressure air bag is 0.3MPa to 0.7MPa.

5. The exhaust gas filter according to claim 1, characterized in that The number of the filter plates is 4 to 7.

6. The exhaust gas filter according to claim 1, characterized in that The filtering accuracy of the filter plate is 50 meshes to 150 meshes.

7. The exhaust gas filter according to claim 1, characterized in that Each of the filter plates is composed of a single-layer stainless steel wire mesh with 5 to 20 meshes on both sides and a single-layer stainless steel wire mesh with 40 to 150 meshes in the inner core.

8. The exhaust gas filter according to claim 1, characterized in that The air inlet comprises: an air inlet column portion and an air inlet flange located below the air inlet column portion; The air outlet comprises: an air outlet column portion and an air outlet flange located on the air outlet column portion.

9. The exhaust gas filter according to claim 8, characterized in that Also includes: A thermocouple is arranged on the air outlet column, and the thermocouple is used to detect the temperature of the air outlet.

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