A processing method for dust collector and filter screen that is easy to repair

Abstract

The present invention provides a dust collector that is easy to maintain, comprising an air intake duct, an exhaust duct, a dust collection box, a dispersion tube, a partition, and two or more ash hoppers. The bottom of the air intake duct is inserted into the dust collection box. The dispersion tube is provided with a dispersion chamber, and the bottom of the air intake duct is connected to the dispersion chamber and is sealed with the dispersion tube. The ash hopper is connected to an air intake branch pipe, which is provided with an air valve, and the air intake duct is sealed with the dispersion tube. The bottom of the ash hopper is provided with an ash outlet, and the bottom of the partition is sealed with the top of the ash hopper. A reflux channel is formed between the ash hopper, the partition, and the inner wall of the dust collection box. The dust collection box is provided with two or more reflux channels, and the reflux channels correspond to the ash hoppers one by one. Each reflux channel is connected to an exhaust branch pipe, which is connected to the exhaust duct, and the air intake branch pipe and the exhaust branch pipe are both provided with an air valve. The advantage of the present invention is that the ash hopper can be maintained separately.

Description

Technical Field

[0001] The invention belongs to the field of desulfurization equipment, and in particular relates to a processing method of a dust collector and a filter screen which are easy to repair. Background Art

[0002] Desulfurization and dust removal equipment is used to desulfurize the flue gas generated in the industrial production process. It generally includes a desulfurization tower and desulfurization and dust removal equipment. The flue gas forms calcium sulfate in the desulfurization tower, and the calcium sulfate is subsequently collected and recovered by the desulfurization and dust removal equipment.

[0003] For the desulfurization and dust removal device involved in Chinese invention patent ZL2018209079347, the direction of flue gas flow is: flowing horizontally from the air inlet into the air inlet channel - flowing from bottom to top in the air inlet channel - flowing horizontally at the connecting pipe - flowing from top to bottom in the reduction tower - flowing from bottom to top in the flue gas rising channel - and being discharged from the exhaust port.

[0004] The problem with the existing technology is that the upper parts of the ash hoppers are connected, so the ash hoppers cannot be repaired separately. As long as one ash hopper is blocked, the entire desulfurization equipment needs to be shut down for maintenance.

[0005] Therefore, the existing technology needs to be improved. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that the ash hopper cannot be repaired separately.

[0007] In order to achieve the above-mentioned purpose, the specific technical solutions of the present invention are as follows:

[0008] The exhaust fan of the present invention is connected with the exhaust fan of the present invention, and the exhaust fan of the present invention is connected with the exhaust fan of the present invention.

[0009] As a further improved technical solution, the end of the air intake branch pipe connected to the dispersion tube is higher than the end of the air intake branch pipe connected to the ash hopper, and the air intake branch pipe is provided with an inwardly protruding dust shield, and the cross-section of the dust shield is arc-shaped.

[0010] As an optional technical solution, it also includes a filter screen, which is arranged in the reflux channel, and the filter screen includes two or more circular or polygonal filter tubes; the cross-section of the filter tube is an inverted V-shape, and the side wall of the filter tube is provided with an exhaust hole, and the exhaust hole is arranged in the upper left or upper right part of the filter tube, and the outer end of the exhaust hole is inclined downward; the two sides of the filter tube are respectively connected to a straight tube, and the adjacent filter tubes are arranged in sequence from the inside to the outside, and the adjacent filter tubes are connected to each other through the straight tubes; the outer end of one of the straight tubes connected to the outermost filter tube is a free end, and the outer end of one of the straight tubes connected to the innermost filter tube is a free end; it also includes a hot air source, and one free end of the straight tube is connected to the hot air source.

[0011] As a further improved technical solution, the number of the filter screens is more than two, adjacent filter screens are arranged in the up and down direction, the number of filter tubes contained in adjacent filter screens differs by one, and the vertical projections of the filter tubes in adjacent filter screens are staggered.

[0012] As an optional technical solution, it also includes a clamping component, a flange plate is connected to the free end of the straight pipe, and a flange plate is also connected to the outlet end of the hot air source. The straight pipe and the hot air source are connected through the flange plate, and a rubber gasket is provided between adjacent flange plates. The clamping component includes a U-shaped connecting piece and two connecting nails fixed to the inner side of the U-shaped connecting piece, and the two connecting nails are respectively connected to the two adjacent flange plates. At least two clamping components are connected to one flange plate, and the clamping component is arranged in the dust removal box.

[0013] The present invention also provides a method for processing a filter screen, which is used to manufacture the dust collector that is easy to maintain, and includes the following steps: S1, taking a circular tube as a raw material and drilling a hole in the circular tube; S2, using a bending machine to extrude the drilled circular tube into a V-shaped cross-section pipe; S3, using a bending machine or a round bending machine to bend the cross-section pipe into a polygonal or circular primary product; S4, welding the two ends of the primary product obtained in step S3 to each other to obtain a filter tube; S5, welding a straight tube to the hole on the side wall of the filter tube to obtain a filter screen.

[0014] As an optional technical solution, the bending machine used in step S2 includes a bending upper die and a bending lower die, the bottom of the bending upper die is provided with a protrusion with a fan-shaped cross-section, the bending upper die is provided with a limiting protrusion, and the bending lower die is provided with a groove with an arc-shaped cross-section, and the limiting protrusion abuts against the top of the bending lower die; the bending lower die is provided with an insert, and the mold is provided with more than three notches, the insert is detachably connected to the notch, and the insert is provided with a positioning protrusion.

[0015] The beneficial effects of the present invention are as follows: the air intake duct of the present invention is used to connect to the desulfurization tower and collect the flue gas therein. The flue gas flows from the air intake duct to the dispersion chamber and then through the air intake branch pipe to the ash hopper. Solid particles in the flue gas settle in the ash hopper and are discharged from the ash outlet. The settled gas rises from the reflux channel to the vicinity of the exhaust branch pipe and finally enters the exhaust duct from the exhaust branch pipe, which discharges the gas collected from the exhaust branch pipe. Because the partition and the inner wall of the dust removal box separate adjacent reflux channels, closing the air valve on an air intake branch pipe can prevent the flue gas in the air intake duct from entering the corresponding ash hopper, thereby allowing the ash hopper to be inspected and maintained separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the present invention;

[0017] Figure 2 It is a schematic diagram of the ash hopper and dispersion tube of the present invention;

[0018] Figure 3 It is a perspective view of the present invention;

[0019] Figure 4 is a top view of the present invention;

[0020] Figure 5 is a schematic diagram of a filter screen of the present invention;

[0021] Figure 6 is a cross-sectional view of a filter tube of the present invention;

[0022] Figure 7 It is a schematic diagram of the filtering principle of the filter screen of the present invention;

[0023] Figure 8 The present invention Figure 4 A magnified view of part A;

[0024] Figure 9 is a schematic diagram of the clamping component of the present invention;

[0025] Figure 10 is a schematic diagram of an exhaust branch pipe of the present invention;

[0026] Figure 11 is a schematic diagram of step S2 of the present invention;

[0027] Figure 12 It is a schematic diagram of the bending lower die of the present invention.

[0028] In the figure: 1-inlet pipe, 11-inlet branch pipe, 12-dust shield, 2-exhaust pipe, 21-exhaust branch pipe, 3-dust removal box, 4-dispersion cylinder, 5-partition, 6-ash hopper, 61-ash outlet, 7-return channel, 8-filter, 81-filter tube, 811-exhaust hole, 82-straight pipe, 83-flange plate, 84-clamping component, 841-U-shaped connecting piece, 842-connecting nail, 9-bending upper die, 91-limiting protrusion, 10-bending lower die, 101-notch, 102-insert, 103-positioning protrusion. DETAILED DESCRIPTION

[0029] The present invention is described in detail below with reference to specific embodiments.

[0030] like Figures 1 to 12 , is an embodiment of the dust collector that is easy to repair of the present invention, specifically:

[0031] A dust collector that is easy to maintain, comprising an air intake duct 1, an exhaust duct 2, a dust removal box 3, a dispersion cylinder 4, a partition 5, and two or more ash hoppers 6; the bottom of the air intake duct 1 is inserted into the dust removal box 3; the dispersion cylinder 4 is provided with a dispersion chamber, the bottom of the air intake duct 1 is communicated with the dispersion chamber and is sealed with the dispersion cylinder 4; the ash hopper 6 is connected to an air intake branch pipe 11, the air intake branch pipe 11 is provided with an air valve, and the air intake duct 1 is sealed with the dispersion cylinder 4; An ash outlet 61 is provided at the bottom of the ash hopper 6, and the bottom of the partition 5 is sealed and connected to the top of the ash hopper 6. A reflux channel 7 is formed between the ash hopper 6, the partition 5 and the inner wall of the dust removal box 3. There are more than two reflux channels 7 in the dust removal box 3, and the reflux channels 7 correspond to the ash hopper 6 one by one; each reflux channel 7 is connected to an exhaust branch pipe 21, and the exhaust branch pipe 21 is connected to the exhaust pipe 2, and the air intake branch pipe 11 and the exhaust branch pipe 21 are both provided with air valves.

[0032] In the present invention, the air inlet pipe 1 is used to connect the desulfurization tower to collect the flue gas in the desulfurization tower. Figure 1 The arrows in the figure indicate the direction of flue gas flow. The flue gas flows from the air intake duct 1 to the dispersion chamber, and then flows into the ash hopper 6 through the air intake branch pipe 11. As the flue gas rises in the reflux channel 7, the heavier solid particles in the flue gas settle into the ash hopper 6 and are discharged from the ash outlet 61. The settled gas rises from the reflux channel 7 to the vicinity of the exhaust branch pipe 21, and finally enters the exhaust duct 2 from the exhaust branch pipe 21. The exhaust duct 2 discharges the gas collected from the exhaust branch pipe 21. Since the partition 5 and the inner wall of the dust removal box 3 separate the adjacent reflux channels 7, by closing the air valve on the air intake branch pipe 11 and the air valve on the exhaust branch pipe 21 closest to a reflux channel 7, the gas in the reflux channel 7 can be prevented from circulating with the outside world, thereby allowing the ash hopper 6 connected to the reflux channel 7 to be separately inspected and maintained.

[0033] As a preferred embodiment, the end of the intake branch pipe 11 connected to the dispersion cylinder 4 is higher than the end of the intake branch pipe 11 connected to the ash hopper 6. The intake branch pipe 11 is provided with an inwardly protruding dust shield 12, and the cross-section of the dust shield 12 is arc-shaped. The intake branch pipe 11 is tilted and provided with the dust shield 12. The intake branch pipe 11 can also perform a dust collection function similar to the ash hopper 6, which is equivalent to increasing the dust collection area. In addition, the temperature of the flue gas is still relatively high when it enters the intake branch pipe 11, so the flue gas will not condense in the intake branch pipe 11, and the intake branch pipe 11 will not be blocked.

[0034] In a preferred embodiment, a filter screen 8 is further included, and the filter screen 8 is arranged in the reflux channel 7. The filter screen 8 includes two or more circular or polygonal filter tubes 81; the cross-section of the filter tube 81 is an inverted V-shape, and an exhaust hole 811 is provided on the side wall of the filter tube 81. The exhaust hole 811 is provided in the upper left or upper right part of the filter tube 81, and the outer end of the exhaust hole 811 is inclined downward; a straight tube 82 is connected to each side of the filter tube 81, and the adjacent filter tubes 81 are arranged in sequence from the inside to the outside, and the adjacent filter tubes 81 are connected to each other through the straight tubes 82; the outer end of one of the straight tubes 82 connected to the outermost filter tube 81 is a free end, and the outer end of one of the straight tubes 82 connected to the innermost filter tube 81 is a free end; a hot air source is also included, and a free end of the straight tube 82 is connected to the hot air source. Figure 5 As shown, Figure 5 The arrows in the figure indicate the direction of airflow in the straight tube 82. After the hot air enters a filter tube 81 from a straight tube 82, it flows from the left and right sides of the filter tube 81 to the straight tube 82 on the opposite side of the straight tube 82, and then flows into a smaller filter tube 81. The direction of the hot air can also be changed so that the hot air first passes through the smaller filter tube 81 and then the larger filter tube 81. The hot air can heat all the filter tubes 81 in sequence to prevent particulate matter in the flue gas from condensing on the filter 8. Since the cross section of the filter tube 81 is an inverted V-shape, as shown in FIG. Figure 7 As shown in the figure, the arrow symbol indicates the movement path of the particles. The flue gas passes through the filter 8 from bottom to top. After the particles in the flue gas are blocked by the filter 8, the speed of the particles changes from upward to downward, making it easier to settle; some particles pass through the filter tubes 81. There is friction between the left and right edges of the filter tubes 81 and the particles, which can reduce the rising speed of the particles and accelerate the settling of the particles. The exhaust hole 811 is used to release part of the hot air. Since the outer end of the exhaust hole 811 is tilted downward, the hot air discharged from the exhaust hole 811 can flush the particles settled on the filter tube 81 downward, so that the filter tube 81 remains clean and avoids the accumulation and condensation of particles on the upper surface of the filter tube 81 after the filter 8 stops working.

[0035] Furthermore, the number of filter screens 8 is two or more, and adjacent filter screens 8 are arranged in a vertical direction. The number of filter tubes 81 included in adjacent filter screens 8 differs by one, and the vertical projections of the filter tubes 81 in adjacent filter screens 8 are staggered. This embodiment has the advantage of improving the filtering effect of the filter screens 8 and preventing the gas in the reflux channel 7 from directly rising to the mouth of the exhaust branch pipe 21 through the gaps between the filter tubes 81.

[0036] In a preferred embodiment, a clamping component 84 is further included. A flange plate 83 is connected to the free end of the straight tube 82, and a flange plate 83 is also connected to the outlet end of the hot gas source. The straight tube 82 and the hot gas source are connected via the flange plate 83. A rubber gasket is provided between adjacent flange plates 83. The clamping component 84 includes a U-shaped connecting piece 841 and two connecting pins 842 fixed to the inner side of the U-shaped connecting piece 841. The two connecting pins 842 are respectively connected to two adjacent flange plates 83. At least two clamping components 84 are connected to a flange plate 83. The clamping component 84 is disposed in the dust removal box 3. During installation of the filter 8 in the dust removal box 3, the sidewalls of the dust removal box 3 must be sealed against the straight tube 82 to prevent gas in the reflux channel 7 from leaking through the sidewalls of the dust removal box 3. Therefore, it is necessary to pre-install a pipeline connected to the hot air source on the side wall of the dust removal box 3 to ensure that the pipeline is sealed with the side wall of the dust removal box 3, and then connect the pipeline to the straight pipe 82 through the flange plate 83. The clamping component 84 can be used to quickly disassemble and assemble two adjacent flange plates 83, so that the filter 8 can be quickly disassembled and assembled from the side wall of the dust removal box 3.

[0037] A method for processing a filter screen, used in the aforementioned dust collector that is easy to maintain, comprises the following steps: S1. Taking a circular tube as raw material and drilling a hole in the circular tube; S2. Using a bending machine to extrude the drilled circular tube into a V-shaped cross-section pipe; S3. Using a bending machine or a circular bending machine to bend the cross-section pipe into a polygonal or annular initial product; S4. Welding the two ends of the initial product obtained in step S3 together to form a filter tube 81; S5. Welding a straight tube 82 to the hole in the side wall of the filter tube 81 to form the filter screen 8. Step S1 is used to process the hole connecting the straight tube 82 and the exhaust hole 811. In step S2, when the circular tube is placed on the bending machine, the axis of the circular tube is placed parallel to the length direction of the bending lower die 10, and the bending upper die 9 is used to press the side wall of the circular tube down along the diameter direction of the circular tube, thereby extruding the circular tube into a V-shaped cross-section pipe. In step S3, when placing the special-shaped cross-section pipe on the bending machine, the axis of the special-shaped cross-section pipe is placed perpendicular to the length direction of the bending lower die 10. The bending machine can bend the special-shaped cross-section pipe into a polygon; the circular bending machine can bend the special-shaped cross-section pipe into a circular ring.

[0038] Furthermore, the bending machine used in step S2 includes a bending upper die 9 and a bending lower die 10, wherein the bottom of the bending upper die 9 is provided with a protrusion with a fan-shaped cross section, the bending upper die 9 is provided with a limiting protrusion 91, and the bending lower die 10 is provided with a groove with an arc-shaped cross section, and the limiting protrusion 91 abuts against the top of the bending lower die 10; the bending lower die 10 is provided with an insert 102, and the mold is provided with more than three notches 101, the insert 102 is detachably connected to the notches 101, and the insert 102 is provided with a positioning protrusion 103. The limiting protrusion 91 is used to limit the downward movement of the bending upper die 9 to avoid excessive extrusion of the circular tube. The positioning protrusion 103 is used to connect the hole on the circular tube to prevent the circular tube from rotating in the bending lower die 10 in step S2. Because the filter screen 8 includes filter tubes 81 of varying lengths, each filter tube 81 has two holes for connecting to the straight tube 82. Connecting both holes simultaneously improves the stability of the positioning of the filter tube 81 with the bending lower die 10. Because the spacing between the two holes for connecting to the straight tube 82 on different filter tubes 81 varies, three or more notches 101 are provided in the bending lower die 10. This allows for adjustment of the position of the inserts 102 on the bending lower die 10, as well as the distance between the two inserts 102, to accommodate the production requirements of filter tubes 81 of varying circumferences. Furthermore, the inserts 102 can be used to verify the correct hole placement on the filter tube 81. Improperly perforated filter tubes 81 will not fit within the positioning protrusions 103 on the inserts 102.

[0039] In the absence of conflict, the above embodiments and features therein may be combined with each other.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A dust collector that is easy to maintain, characterized by: Including air intake duct, exhaust duct, dust removal box, dispersion cylinder, partition and more than two ash hoppers; The bottom of the air intake duct is inserted into the dust removal box; A dispersion chamber is provided in the dispersion cylinder, and the bottom of the air inlet pipe is communicated with the dispersion chamber and is sealed with the dispersion cylinder; The ash hopper is connected to an air intake branch pipe, the air intake branch pipe is provided with an air valve, and the air intake pipe is sealed and connected to the dispersion cylinder; An ash outlet is provided at the bottom of the ash hopper, the bottom of the partition is sealedly connected to the top of the ash hopper, a reflux channel is formed between the ash hopper, the partition and the inner wall of the dust removal box, and the dust removal box is provided with two or more reflux channels, and the reflux channels correspond to the ash hoppers one by one; Each reflux channel is connected to an exhaust branch pipe, the exhaust branch pipe is connected to the exhaust pipe, and the intake branch pipe and the exhaust branch pipe are both provided with an air valve; The end of the air intake branch pipe connected to the dispersion tube is higher than the end of the air intake branch pipe connected to the ash hopper, and the air intake branch pipe is provided with an inwardly protruding dust shield, and the cross section of the dust shield is arc-shaped; It also includes a filter screen, which is arranged in the reflux channel and includes two or more circular or polygonal filter tubes; The cross section of the filter tube is in an inverted V shape, and a small exhaust hole is provided on the side wall of the filter tube. The small exhaust hole is provided at the upper left or upper right part of the filter tube, and the outer end of the small exhaust hole is inclined downward; Both sides of the filter tube are connected with a straight tube respectively, and the adjacent filter tubes are arranged in sequence from the inside to the outside, and the adjacent filter tubes are connected to each other through the straight tubes; the outer end of one of the straight tubes connected to the outermost filter tube is a free end, and the outer end of one of the straight tubes connected to the innermost filter tube is a free end; A hot air source is also included, and a free end of the straight tube is connected to the hot air source.

2. The dust collector that is easy to maintain according to claim 1, characterized in that: The number of the filter screens is more than two, adjacent filter screens are arranged in the vertical direction, the number of filter tubes contained in adjacent filter screens differs by one, and the vertical projections of the filter tubes in adjacent filter screens are staggered.

3. The dust collector that is easy to maintain according to claim 1, characterized in that: It also includes a clamping component, a flange plate is connected to the free end of the straight pipe, and a flange plate is also connected to the outlet end of the hot air source. The straight pipe and the hot air source are connected through the flange plate, and a rubber gasket is provided between adjacent flange plates. The clamping component includes a U-shaped connecting piece and two connecting nails fixed to the inner side of the U-shaped connecting piece. The two connecting nails are respectively connected to two adjacent flange plates. At least two clamping components are connected to one flange plate. The clamping component is arranged in the dust removal box.

4. A method for processing a filter screen, characterized in that: The method for manufacturing the dust collector that is easy to maintain according to claim 1 comprises the following steps: S1. Take a round tube as raw material and drill holes in the round tube; S2. Using a bending machine to extrude the drilled round pipe into a V-shaped special-section pipe; S3, using a bending machine or a round bending machine to bend the special-shaped cross-section pipe into a polygonal or circular primary product; S4, welding the two ends of the primary product obtained in step S3 to each other to obtain a filter tube; S5. Weld a straight tube to the hole on the side wall of the filter tube to obtain a filter screen.

5. The method for processing a filter screen according to claim 4, characterized in that: The bending machine used in step S2 includes a bending upper die and a bending lower die, the bottom of the bending upper die is provided with a protrusion with a fan-shaped cross-section, the bending upper die is provided with a limiting protrusion, and the bending lower die is provided with a groove with an arc-shaped cross-section, and the limiting protrusion abuts against the top of the bending lower die; the bending lower die is provided with an insert, and the mold is provided with more than three notches, the insert is detachably connected to the notch, and the insert is provided with a positioning protrusion.

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