Multi-stage filter for waste gas treatment

Abstract

The utility model provides a multistage filter for waste gas treatment, which comprises a shell, an exhaust interface is arranged on the left side wall of the shell, a waste gas inlet and a fresh air inlet are arranged on the right side wall of the shell, a plurality of net-shaped positioning frames are arranged side by side between the left side wall and the right side wall in the shell, and filter cotton is arranged on the right side of each positioning frame. The densities of the multiple pieces of filter cotton arranged from right to left are sequentially increased, and access doors are arranged at the positions, corresponding to the rear sides of the positioning frames, of the front side of the shell. The utility model has the beneficial effects that a plurality of pieces of filter cotton are arranged in the shell side by side at intervals, and are limited and mounted through the positioning frames, so that the filter cotton is fixed on the right side of the corresponding positioning frame, and the filter cotton is stably supported; waste gas is blown in from the waste gas inlet in the rear side of the shell, is filtered by the multi-stage filter cotton and then is discharged out of the filter from the exhaust port in the left side, and meanwhile, fresh air is blown into the shell from the fresh air inlet in the left side to purge impurities attached to the filter cotton, so that the filter efficiency is effectively improved, and the filter cotton is prevented from being blocked.

Description

Technical Field

[0001] The utility model belongs to the field of waste gas treatment equipment, in particular to a multi-stage filter for waste gas treatment. Background Art

[0002] In waste gas treatment, activated carbon adsorption process is often used for adsorption. However, after the activated carbon is replaced, the discarded activated carbon is classified as hazardous waste, which is expensive to handle. At the same time, it must be replaced after a certain period of adsorption, otherwise the treatment effect will be significantly reduced. Therefore, in order to avoid this situation, multi-stage filtration is used for waste gas treatment. At present, the commonly used multi-stage filtration structure is composed of filter cottons of different grades connected in series, but the structural stability needs to be improved, and it is inconvenient to replace the filter cotton at a later stage. In addition, flocculent or granular impurities are easily attached to the filter cotton, which is easy to block the filter cotton and reduce the filtration efficiency. Utility Model Content

[0003] In view of this, the utility model aims to overcome the deficiencies of the above-mentioned problems in the prior art and proposes a multi-stage filter for exhaust gas treatment.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A multi-stage filter for waste gas treatment comprises a shell, an exhaust interface is arranged on the left wall of the shell, and an exhaust gas inlet and a fresh air inlet are arranged on the right wall. A plurality of mesh positioning frames are arranged vertically side by side between the left wall and the right wall inside the shell, filter cotton is arranged on the right side of each positioning frame, and the density of the plurality of filter cottons arranged from right to left increases successively, and an inspection door is arranged on the front side of the shell corresponding to the rear side of each positioning frame.

[0006] Furthermore, a differential pressure gauge is installed on the front side wall of the shell corresponding to the position between the two sides of each filter cotton.

[0007] Furthermore, each positioning frame includes a plurality of reinforcing ribs fixed together in a transverse and longitudinal staggered manner, and both ends of each reinforcing rib are fixed to the inner wall of the shell.

[0008] Furthermore, there are four positioning frames, and the filter cottons are first-level filter cotton, second-level filter cotton, third-level filter cotton, and fourth-level filter cotton with increasing density from right to left, and are respectively fixed on the right side walls of the corresponding positioning frames.

[0009] Furthermore, the filtering levels of the first-stage filter cotton, the second-stage filter cotton, the third-stage filter cotton, and the fourth-stage filter cotton are G4, F5, F7, and F9, respectively.

[0010] Furthermore, a drainage pipe communicating with the interior of the shell is provided at the bottom of the front side wall of the shell, corresponding to between each two adjacent filter cottons or between the filter cottons and the adjacent side walls of the shell, and a switch valve is provided on each drainage pipe.

[0011] Furthermore, a mounting opening is provided on the shell corresponding to each inspection door, one end of the inspection door is hinged at the corresponding mounting opening by a hinge, and the other end is fixedly connected to fixing parts on the upper and lower sides, and the fixing parts include an L-shaped fixing seat and a fixing plate fixedly connected to the outer side of the vertical section of the fixing seat, and a U-shaped groove is provided at the outer end of the fixing plate, and the horizontal section of the fixing seat is fixed to the inspection door, and a locking part is fixedly connected to each fixing part on the shell, and the locking part includes a mounting seat fixedly connected to the shell and a connecting rod fixedly connected to the mounting seat forward, and a handwheel is screwed on the connecting rod, and the connecting rod can pass through the groove on the fixing plate, and the handwheel can be pressed against the front side of the fixing plate.

[0012] Furthermore, the fresh air inlet is connected to a fresh air duct, and the exhaust gas inlet is connected to an exhaust gas duct, and the fresh air duct and the exhaust gas duct are arranged so that their extended lines intersect near the shell.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] The multi-stage filter for waste gas treatment described in the utility model arranges multiple filter cottons side by side and at intervals in a shell body, and limits the installation of the filter cottons in the shell body through a positioning frame, so that the filter cottons are fixed on the right side of the corresponding positioning frame to stably support the filter cottons; the waste gas is blown in from the waste gas inlet on the rear side of the shell body, and after being filtered by the multi-stage filter cottons, it is discharged from the filter from the exhaust interface on the left side. At the same time, fresh air is blown into the shell body from the fresh air inlet on the left side to blow away the debris attached to the filter cotton, thereby effectively improving the filtering efficiency and avoiding clogging of the filter cotton. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the structure of a multi-stage filter for waste gas treatment according to an embodiment of the utility model;

[0017] Figure 2 This is a right side view of the multi-stage filter for waste gas treatment according to an embodiment of the utility model;

[0018] Figure 3 for Figure 2 Sectional view in the AA direction;

[0019] Figure 4This is a front view of a multi-stage filter for waste gas treatment according to an embodiment of the utility model;

[0020] Figure 5 for Figure 4 Cross-sectional view in the BB direction;

[0021] Figure 6 for Figure 1 A partial enlarged view of point C in the middle.

[0022] Description of reference numerals:

[0023] 1. Shell; 101. Exhaust interface; 102. Exhaust gas inlet; 103. Fresh air inlet; 2. Positioning frame; 3. Filter cotton; 4. Inspection door; 5. Hinge; 6. Fixing piece; 601. Fixing seat; 602. Fixing plate; 603. Slot; 7. Locking piece; 701. Mounting seat; 702. Connecting rod; 703. Handwheel; 8. Connecting seat for differential pressure gauge; 9. Drain pipe; 10. Fixing rod. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" 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 it can be 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 by specific circumstances.

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0028] As shown in the figure, a multi-stage filter for exhaust gas treatment includes a shell 1, an exhaust port 101 is provided on the left wall of the shell 1, an exhaust gas inlet 102 and a fresh air inlet 103 are provided on the right wall, and a plurality of mesh positioning frames 2 are vertically arranged side by side between the left wall and the right wall inside the shell, and a filter cotton 3 is provided on the right side of each positioning frame 2 ( Figure 1 , Figure 2 , Figure 5 (not shown), and the density of the multiple filter cottons 3 arranged from right to left increases in sequence, and an inspection door 4 is provided at the rear side of each positioning frame 2 corresponding to the front side of the housing 1. In this embodiment, multiple filter cottons 3 are arranged side by side and at intervals in the housing 1, and are limitedly installed in the housing 1 through the positioning frame 2, so that the filter cottons 3 are fixed on the right side of the corresponding positioning frame 2, and the filter cottons 3 are stably supported. The exhaust gas is blown in from the exhaust gas inlet 102 on the rear side of the housing 1, and after being filtered by the multi-stage filter cottons 3, it is discharged from the exhaust interface 101 on the left side. At the same time, fresh air is blown into the housing 1 from the fresh air inlet 103 on the left side to purge the debris attached to the filter cotton 3, effectively improving the filtering efficiency and avoiding the clogging of the filter cotton 3.

[0029] A differential pressure gauge (not shown) is installed on the front side wall of the housing 1 at the position corresponding to the two sides of each filter cotton 3. The differential pressure gauge is used to monitor whether the corresponding filter cotton 3 in the box body is clogged. The greater the pressure difference, the greater the data of the increased pressure difference, indicating that the filter cotton 3 is clogged here, and the operator needs to deal with it in time. In this embodiment, a differential pressure gauge connection seat 8 is installed on the front side wall of the housing 1 at the position corresponding to the two sides of each filter cotton 3, and the differential pressure gauge is installed on the differential pressure gauge connection seat 8.

[0030] Each positioning frame 2 includes a plurality of reinforcing ribs that are fixed together in a horizontal and vertical staggered manner, and both ends of each reinforcing rib are fixed together with the inner wall of the housing 1. In this embodiment, the reinforcing ribs are sheet-like strip structures, and the horizontal and vertical reinforcing ribs are fixed at the connection by bolts and nuts, or they can be fixed together by welding. Of course, the reinforcing ribs can also be structures with circular cross sections, and the horizontal and vertical reinforcing ribs are fixed together at the connection by cross buckles.

[0031] There are four positioning frames 2, and the filter cottons 3 are first-stage filter cottons 3, second-stage filter cottons 3, third-stage filter cottons 3, and fourth-stage filter cottons 3, which have increasing densities from right to left, and are respectively fixed on the right side wall of the corresponding positioning frame 2. In this embodiment, a fixing rod 10 is crimped on the right edge of the filter cotton 3, and the fixing rod 10, the filter cotton 3, and the positioning frame 2 are fixed together by bolts.

[0032] The filtering levels of the first filter cotton 3, the second filter cotton 3, the third filter cotton 3, and the fourth filter cotton 3 are G4, F5, F7, and F9, respectively. In this embodiment, the G4 level is a high-efficiency filter with a filtering efficiency of up to 80%-90%, which can filter particles larger than 1 μm; the F5 level is a good primary filter, which can filter particles larger than 0.5 μm, and the filtering efficiency reaches 40%-60%; the F7 level is a medium-efficiency filter with a filtering efficiency of 80%-90%, which can filter particles larger than 0.3 μm; the F9 level is an ultra-high-efficiency filter with a filtering efficiency of more than 99%, which can filter particles larger than 0.3 μm.

[0033] A drain pipe 9 communicating with the interior of the housing 1 is provided at the bottom of the front side wall of the housing 1, corresponding to between each two adjacent filter cottons 3 or between the filter cotton 3 and the adjacent side wall of the housing 1, and a switch valve (not shown in the figure) is provided on each drain pipe 9. In this embodiment, the interior of the housing 1 is divided into a plurality of cavities by a plurality of filter cottons 3, and a drain pipe 9 is provided at the bottom of the front side wall of the housing 1, corresponding to each cavity, and communicated with the corresponding cavity through the drain pipe 9. During use, the exhaust gas is likely to contain water vapor, which is likely to condense into water droplets and remain in the housing 1 under the obstruction of the filter cotton 3, and this part of water can be discharged from the housing 1 through the drain pipe 9.

[0034] A mounting opening is provided on the shell 1 corresponding to each inspection door 4, one end of the inspection door 4 is hinged at the corresponding mounting opening by a hinge 5, and the other end is fixedly connected to fixing members 6 on both upper and lower sides, and the fixing member 6 includes an L-shaped fixing seat 601 and a fixing plate 602 fixed to the outer side of the vertical section of the fixing seat 601, and a U-shaped groove 603 is provided at the outer end of the fixing plate 602, and the horizontal section of the fixing seat 601 is fixed to the inspection door 4, and a locking member 7 is fixedly connected to each fixing member 6 on the shell 1, and the locking member 7 includes a mounting seat 701 fixed to the shell 1 and a connecting rod 702 fixed forwardly to the mounting seat 701, and a handwheel 703 is screwed on the connecting rod 702, and the connecting rod 702 can pass through the groove 603 on the fixing plate 602, and the handwheel 703 can be pressed against the front side of the fixing plate 602. In this embodiment, when the inspection door 4 needs to be closed, the inspection door 4 is pushed to close, and during this process, the fixed plate 602 gradually approaches the connecting rod 702 until the inspection door 4 is fully closed, and the slot 603 on the fixed plate 602 and the connecting rod 702 are connected together, and then the hand wheel 703 is turned to move toward the fixed plate 602 until it is pressed against the front side of the fixed plate 602. In this embodiment, in order to smoothly connect the slot 603 and the connecting rod 702 together, the width and depth of the slot 603 are greater than the width of the connecting rod 702.

[0035] The fresh air inlet 103 is connected to a fresh air duct, and the exhaust gas inlet 102 is connected to an exhaust gas duct. The fresh air duct and the exhaust gas duct are arranged so that their extended lines intersect near the shell 1 (not shown in the figure).

[0036] The working process of this embodiment is as follows:

[0037] In the thermal storage exhaust gas treatment system, the exhaust port 101 of the filter is connected to the zeolite concentrating rotor in the subsequent exhaust gas treatment system through a pipeline, and the fresh air inlet 103 is connected to the fresh air pipeline, and the exhaust gas inlet 102 is connected to the exhaust gas pipeline, and the fresh air pipeline and the exhaust gas pipeline are not in a parallel state, that is, the extension lines of the two are in an intersecting state, so that the fresh air and the exhaust gas are blown into the shell 1 from different directions, and the fresh air will sweep the flocculent or granular debris attached to the filter cotton 3, improve the filtering efficiency, and avoid the blockage of the filter cotton 3. In the shell 1, the exhaust gas is filtered by the filter cotton 3 of G4, F5, F7, and F9 levels in turn to remove the particulate matter and residue in the exhaust gas, and is introduced into the zeolite concentrating rotor for subsequent treatment after meeting the cleanliness requirements for entering the zeolite concentrating rotor.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage filter for waste gas treatment, characterized in that: It includes a shell, an exhaust interface is provided on the left wall of the shell, an exhaust gas inlet and a fresh air inlet are provided on the right wall, and a plurality of mesh positioning frames are vertically arranged side by side between the left wall and the right wall inside the shell, filter cotton is provided on the right side of each positioning frame, and the density of the plurality of filter cottons arranged from right to left increases successively, and an inspection door is provided on the front side of the shell corresponding to the rear side of each positioning frame.

2. A multi-stage filter for waste gas treatment according to claim 1, characterized in that: A differential pressure gauge is installed on the front side wall of the shell corresponding to the positions between the two sides of each filter cotton.

3. The multi-stage filter for waste gas treatment according to claim 1, characterized in that: Each positioning frame comprises a plurality of reinforcing ribs which are fixed together in a horizontal and vertical staggered manner, and both ends of each reinforcing rib are fixed together with the inner wall of the shell.

4. The multi-stage filter for waste gas treatment according to claim 1, characterized in that: There are four positioning frames, and the filter cottons are first-level filter cotton, second-level filter cotton, third-level filter cotton, and fourth-level filter cotton with increasing density from right to left, and are respectively fixed on the right side wall of the corresponding positioning frame.

5. A multi-stage filter for waste gas treatment according to claim 4, characterized in that: The filtration levels of the first-stage filter cotton, the second-stage filter cotton, the third-stage filter cotton, and the fourth-stage filter cotton are G4, F5, F7, and F9 respectively.

6. The multi-stage filter for waste gas treatment according to claim 1, characterized in that: A drainage pipe communicating with the interior of the shell is arranged at the bottom of the front side wall of the shell, corresponding to the position between each two adjacent filter cottons or between the filter cottons and the adjacent side wall of the shell, and a switch valve is arranged on each drainage pipe.

7. The multi-stage filter for waste gas treatment according to claim 1, characterized in that: A mounting opening is provided on the shell body corresponding to each inspection door, one end of the inspection door is hinged at the corresponding mounting opening by a hinge, and fixing parts are fixedly connected to the upper and lower sides of the other end, and the fixing part includes an L-shaped fixing seat and a fixing plate fixedly connected to the outer side of the vertical section of the fixing seat, and a U-shaped groove is provided at the outer end of the fixing plate, and the horizontal section of the fixing seat is fixed to the inspection door, and a locking part is fixedly connected to each fixing part on the shell body, and the locking part includes a mounting seat fixedly connected to the shell body and a connecting rod fixedly connected to the mounting seat forward, and a handwheel is screwed on the connecting rod, and the connecting rod can pass through the groove setting on the fixing plate, and the handwheel can be pressed against the front side of the fixing plate.

8. The multi-stage filter for waste gas treatment according to claim 1, characterized in that: The fresh air inlet is connected to a fresh air duct, the exhaust gas inlet is connected to an exhaust gas duct, and the fresh air duct and the exhaust gas duct are arranged so that their extended lines intersect near the shell.

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