Primary and medium efficiency filter

Abstract

The utility model discloses a primary and medium efficiency filter which comprises an upper filter unit and a lower filter unit which are arranged at the upper end and the lower end in a frame, horizontal partition plates are arranged at the upper end and the lower end of the inner wall of the frame, and an opening of the frame is divided into at least two filter mounting cavity openings by the partition plates; the upper filter unit comprises a frame, a filter screen with a wave-shaped structure is welded between two side walls of the frame in the width direction, corrugated end covers are welded on two side walls of the frame in the length direction, the corrugated end covers are matched with the wave gap structure of the filter screen, and the side end of the filter screen is hermetically welded with the corresponding corrugated end cover; the structure of the lower filter unit is the same as that of the upper filter unit; the filter disclosed by the utility model has the advantages of high filtering precision, high filtering efficiency, high structural strength of the filter screen, long service life, detachable filter units, convenience in maintenance and replacement, low maintenance cost and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter technical field, concretely is a primary and secondary efficiency filter. BACKGROUND

[0002] Biomass gas is mainly produced by crop straw, forest waste, edible fungus slag, poultry manure, sewage sludge and other substances containing biomass under high temperature pyrolysis or gasification decomposition, and the traditional biomass gas is cooled first, then filtered by glass fiber or primary filter paper, which has long time and low efficiency, large energy loss, low temperature resistance and short service life of the filter material; the patent publication No. CN203777849U discloses a primary filter, which specifically discloses a filter screen layer on the assembly frame, the filter screen layer is in a wave-shaped folding structure as a whole, and is provided with a plurality of air holes, but there are problems of low filtering precision, low filtering efficiency, difficulty in replacing the filter screen of the filter, high maintenance cost and the like. SUMMARY

[0003] The utility model solves the technical problem of overcoming the defects of the prior art, provides a primary and secondary efficiency filter, which has high filtering precision, large filtering area, high filtering efficiency, high filter screen structure strength, good high temperature resistance, long service life, high structure strength, good high temperature resistance, long service life, can eliminate the cooling treatment of the gas, and improves the efficiency of the gas filtering treatment; the upper filter unit and the lower filter unit can be detached, so that maintenance and replacement are convenient, the maintenance cost is low, and the problems in the background art can be effectively solved.

[0004] To achieve the above object, the utility model provides the following technical scheme: a primary and secondary efficiency filter, which comprises an upper filter unit and a lower filter unit arranged at the upper and lower ends of the frame inside, the upper and lower ends of the inner wall of the frame are provided with horizontal partition plates, the partition plates divide the opening of the frame into not less than two filter installation cavities, the upper filter unit is fixedly connected at the filter installation cavity at the upper end, and the lower filter unit is fixedly connected at the filter installation cavity at the lower end; the upper filter unit comprises a frame, wave-shaped filter screens are welded between the two side walls in the width direction of the frame, corrugated end covers are welded on the two side walls in the length direction of the frame, the corrugated end covers are matched with the wave gaps of the filter screens, and the side ends of the filter screens are sealingly welded with the corresponding corrugated end covers; the structure of the lower filter unit is the same as that of the upper filter unit, and the upper filter unit and the lower filter unit are symmetrically distributed.

[0005] Further, the filter screen of the upper filter unit is a coarse filter screen, and the filter screen of the lower filter unit is a fine filter screen.

[0006] Further, the coarse filter screen comprises a reinforcing layer one, a protection layer one and a metal sintered screen layer arranged in sequence from inside to outside; and the fine filter screen comprises a metal sintered felt layer, a protection layer two and a reinforcing layer two arranged in sequence from outside to inside.

[0007] Further, the frame is fixedly connected with the partition plate through the connecting bolts penetrating the mounting holes and the connecting screw holes.

[0008] Further, the partition plate is in a Chinese character structure, and the partition plate divides the opening of the frame into four filter mounting cavities, and the number of the upper filter units and the lower filter units is four.

[0009] Further, a plurality of upper support clamping plates are arranged between the two side walls in the width direction of the frame, and the bottom surface of each upper support clamping plate is provided with a wave-shaped clamping groove one matched with the wave structure at the top end of the filter screen; a plurality of lower support clamping plates are also arranged between the two side walls in the width direction of the frame, and the top surface of each lower support clamping plate is provided with a wave-shaped clamping groove two matched with the wave structure at the bottom end of the filter screen, and the two ends of each lower support clamping plate are provided with a connecting plate fixedly connected with the frame.

[0010] Further, support vertical beams are welded between the partition plates at the upper and lower ends in the frame.

[0011] Compared with the prior art, the primary and medium efficiency filter has the following beneficial effects: the coarse filter screen of the upper filter unit coarsely intercepts large particle substances in the gas, and then the gas passes through the fine filter screen of the lower filter unit, and the fine filter screen finely intercepts small particle substances in the gas; the coarse filter screen and the fine filter screen are in a wave folding structure, so that the filtering area is increased and the filtering efficiency is improved; the filtering layer of the coarse filter screen is a metal sintered screen layer, and the filtering layer of the fine filter screen is a metal sintered felt layer, so that the filter screen has high structural strength, good high-temperature resistance and long service life, the cooling treatment of the gas can be omitted, and the efficiency of the gas filtering treatment is improved; the wave filter screen is shaped and supported through the upper support clamping plates and the lower support clamping plates, the primary and medium efficiency filter has high structural strength; the upper filter unit and the lower filter unit are detachable, so that the maintenance and replacement are convenient, and the maintenance cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic view of the utility model;

[0013] Figure 2 It is a top view of the utility model;

[0014] Figure 3 It is a top view of the frame of the utility model;

[0015] Figure 4The upper filter unit is a top view of the utility model;

[0016] Figure 5 The upper support clamping plate and the lower support clamping plate cooperate with the filter screen, which is a schematic view of the utility model;

[0017] Figure 6 The upper support clamping plate is a structural schematic view of the utility model;

[0018] Figure 7 The lower support clamping plate is a structural schematic view of the utility model;

[0019] Figure 8 The corrugated end cover cooperates with the filter screen, which is a schematic view of the utility model;

[0020] Figure 9 The coarse filter screen is a partial enlarged view of the utility model;

[0021] Figure 10 The fine filter screen is a partial enlarged view of the utility model.

[0022] In the drawing: 1, frame; 101, filter mounting cavity opening; 2, partition; 21, connecting screw hole; 3, upper filter unit; 31, frame; 311, mounting hole; 312, connecting bolt; 32, coarse filter screen; 321, first reinforcing layer; 322, first protective layer; 323, metal sintered screen layer; 33, upper support clamping plate; 331, first wave-shaped clamping groove; 34, lower support clamping plate; 341, second wave-shaped clamping groove; 342, connecting plate; 35, corrugated end cover; 4, lower filter unit; 42, fine filter screen; 421, second reinforcing layer; 422, second protective layer; 423, metal sintered felt layer; 5, support vertical beam. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model. EMBODIMENT

[0024] Please refer to Figures 1-10This utility model provides a technical solution: a primary and medium efficiency filter, including an upper filter unit 3 and a lower filter unit 4 provided at the upper and lower ends inside the frame 1. The upper and lower ends of the inner wall of the frame 1 are provided with horizontally arranged partitions 2, which divide the opening of the frame 1 into no less than two filter installation cavities 101. The upper filter unit 3 is fixedly connected to the filter installation cavity 101 at the upper end, and the lower filter unit 4 is fixedly connected to the filter installation cavity 101 at the lower end.

[0025] In this embodiment, the partition 2 has a grid-shaped structure, and the partition 2 divides the opening of the frame 1 into four filter installation cavities 101. The number of upper filter units 3 and lower filter units 4 are both four.

[0026] The upper filter unit 3 includes a frame 31, with a corrugated filter screen welded between the two side walls in the width direction of the frame 31. Corrugated end caps 35 are welded to both side walls in the length direction of the frame 31, and the corrugated end caps 35 are adapted to the corrugated gap structure of the filter screen. The side ends of the filter screen are sealed and welded to their corresponding corrugated end caps 35. The structure of the lower filter unit 4 is the same as that of the upper filter unit 3, and the upper filter unit 3 and the lower filter unit 4 are symmetrically distributed vertically. The filter screen of the upper filter unit 3 is a coarse filter screen 32, and the filter screen of the lower filter unit 4 is a fine filter screen 42.

[0027] The coarse filter 32 includes a first reinforcing layer 321, a first protective layer 322, and a sintered metal mesh layer 323 arranged sequentially from the inside to the outside, and the mesh size of the sintered metal mesh layer 323 is 100 mesh; the fine filter 42 includes a second sintered metal felt layer 423, a second protective layer 422, and a second reinforcing layer 421 arranged sequentially from the outside to the inside, and the filtration accuracy of the sintered metal felt layer 423 is 50 μm.

[0028] Multiple upper support plates 33 are provided between the two side walls of the frame 31 in the width direction. The bottom surface of the upper support plate 33 is provided with a wave groove 331 that is adapted to the wave structure at the top of the filter screen. Multiple lower support plates 34 are also provided between the two side walls of the frame 31 in the width direction. The top surface of the lower support plate 34 is provided with a wave groove 341 that is adapted to the wave structure at the bottom of the filter screen. Both ends of the lower support plate 34 are provided with connecting plates 342 that are fixedly connected to the frame 31.

[0029] Working principle:

[0030] The gas to be filtered flows from top to bottom, when the gas passes through the primary and medium efficiency filter, the gas first passes through the coarse filter screen 32 of the upper filter unit 3, the coarse filter screen 32 coarsely intercepts the large particle substances contained in the gas, then the gas passes through the fine filter screen 42 of the lower filter unit 4, the fine filter screen 42 finely intercepts the small particle substances contained in the gas; the filtering precision is high, and the filtering effect is good; the coarse filter screen 32 and the fine filter screen 42 are both in a wave folding structure, the filtering area is increased, and the filtering efficiency is improved; the filtering layer of the coarse filter screen 32 is a metal sintered screen layer 323, and the filtering layer of the fine filter screen 42 is a metal sintered felt layer 423, the filter screen structure strength is high, the high-temperature resistance is good, the service life is long, the cooling treatment of the gas can be avoided, and the efficiency of the gas filtering treatment is improved; the wave filter screen is shaped and supported through the upper support clamping plate 33 and the lower support clamping plate 34, and the primary and medium efficiency filter has high structural strength.

[0031] Further, the frame 31 is uniformly provided with mounting holes 311 along the circumferential edge thereof, the partition plates 2 are both provided with connecting screw holes 21 at positions corresponding to the mounting holes 311, and the frame 31 is fixedly connected with the partition plates 2 by penetrating the mounting holes 311 and the connecting screw holes 21 through connecting bolts 312; each upper filter unit 3 and lower filter unit 4 is detachable, and convenient to maintain and replace.

[0032] Further, the frame 1 is welded with support vertical beams 5 between the partition plates 2 at the upper and lower ends.

[0033] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A primary and secondary filter comprising an upper filter unit and a lower filter unit provided on both upper and lower ends of the inside of a frame, characterized in that: The upper and lower ends of the inner wall of the frame are provided with horizontally arranged partitions, the partitions divide the opening of the frame into not less than two filter mounting cavities, the filter mounting cavities at the upper end are fixedly connected with upper filter units, and the filter mounting cavities at the lower end are fixedly connected with lower filter units; the upper filter unit comprises a frame, wave-shaped filter screens are welded between the two side walls in the width direction of the frame, corrugated end covers are welded to the two side walls in the length direction of the frame, the wave gaps of the corrugated end covers are matched with the wave gaps of the filter screens, and the side ends of the filter screens are sealingly welded to the corresponding corrugated end covers; the lower filter unit has the same structure as the upper filter unit, and the upper filter unit and the lower filter unit are symmetrically distributed.

2. An intermediate efficiency filter according to claim 1, wherein: The filter screen of the upper filter unit is a coarse filter screen, and the filter screen of the lower filter unit is a fine filter screen.

3. An intermediate efficiency filter according to claim 2, wherein: The coarse filter screen comprises a reinforcing layer one, a protection layer one and a metal sintered screen layer arranged in sequence from inside to outside; and the fine filter screen comprises a metal sintered felt layer, a protection layer two and a reinforcing layer two arranged in sequence from outside to inside.

4. A primary medium efficiency filter according to claim 1, wherein: Mounting holes are uniformly arranged along the circumferential edge of the frame, connecting screw holes are arranged on the partition at positions corresponding to the mounting holes, and the frame is fixedly connected with the partition through connecting bolts penetrating the mounting holes and the connecting screw holes.

5. A primary medium efficiency filter as set forth in claim 1, characterized by: The partition has a cross-shaped structure, and the partition divides the opening of the frame into four filter mounting cavities, and the number of the upper filter units and the lower filter units is four.

6. A primary medium efficiency filter as set forth in claim 1, characterized by: A plurality of upper support clamping plates are arranged between the two side walls in the width direction of the frame, and the bottom surface of the upper support clamping plate is provided with a wave-shaped clamping groove one matched with the wave structure of the top end of the filter screen; a plurality of lower support clamping plates are also arranged between the two side walls in the width direction of the frame, the top surface of the lower support clamping plate is provided with a wave-shaped clamping groove two matched with the wave structure of the bottom end of the filter screen, and the two ends of the lower support clamping plate are provided with connecting plates fixedly connected with the frame.

7. A primary medium efficiency filter as set forth in claim 1, characterized by: Support vertical beams are welded between the partitions at the upper and lower ends of the frame.

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