JPH04110117U - dust collector - Google Patents

Abstract

(57) [Summary] [Purpose] To perform backwashing of a filtration unit reliably and efficiently. [Structure] A dust collector body 1 has a suction opening 2 for dust-containing gas at the top and a dust fall path 4 at the bottom.
A large number of filtration units 10 are installed through the filtration unit insertion/removal port 9 provided at the filtration unit 8, one side of the unit 10 located at the insertion/removal port 9 serves as a clean gas outlet 15, and an enclosure wall 25 covering the outlet 15 is provided. The main body side wall 8 forms a gas outlet passage 26, and the outlet passage 26 is a plurality of dividing passages 26A for each group of the fitting/removal openings 9. Clean gas is supplied to the lower part of each dividing passage 26A via an opening/closing means 32. In a dust collector in which a discharge duct 31 is connected and each divided passage 26A is provided with a compressed air injection pipe 22 to each outlet 15, each opening/closing means 32 connects each divided passage 26A, the communication opening 34 of the discharge duct 31, and the atmosphere. It consists of double valves 44, 45 that open and close the suction opening 36.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a dust collector with a function to separate dust attached to the filtration unit. It is related to

0002

[Conventional technology]

Conventionally, the dust-containing gas sucked from the dust-containing gas suction opening at the top of the dust collector main body was passed through the filtration unit. The gas is filtered through the knit to make it clean, and then discharged from the gas outlet on the side via the opening/closing means. At the same time, part of the dust is discharged through the falling path at the bottom of the main body, and another part of the dust There are known dust collectors that collect dust using a filtration unit (for example, (See Publication No. 63-44093). Then, in the dust collector, the filtration unit is attached. The accumulated dust is filtered by back-flowing compressed air into the unit from the gas outlet path. The unit is vibrated violently to shake it off and ejected from the falling path. There is. When injecting compressed air into the filtration unit, the filtration unit must be The opening/closing means of the gas outlet path communicating with the gas outlet is closed to ensure backwashing. It looks like this.

0003

[Problem that the idea aims to solve]

In the conventional example above, when backwashing a filtration unit, the unit When the opening/closing means of the gas outlet path following is closed, the gas outlet path and the inside of the unit are The gas in the unit is sucked into the adjacent filtration unit, creating a negative pressure. Even if compressed air is injected into the unit, the vibration of the jet flow acting on the unit is weak and the There is a problem in that the dust is not removed sufficiently.

0004 This invention was made in view of the above-mentioned circumstances, and its purpose is to provides a dust collector that can perform backwashing of a filtration unit reliably and efficiently. It is in.

[0005]

[Means to solve the problem]

In order to achieve the above object, the present invention takes the following technical measures. That is, books The invention is to provide each of the above-mentioned channels in a main body having a dust-containing gas inlet and a plurality of clean gas outlets. A filtration unit is provided corresponding to the outlet, and each of the outlet ports communicates with a gas outlet path. The gas outlet path is connected to the clean gas exhaust duct via a freely openable/closeable opening/closing means. and each of the outlet ports has a filtration unit corresponding to each outlet port. On the other hand, in a dust collector equipped with an injection pipe that blows out compressed air, The opening/closing means communicates the gas outlet path with the outside world in a first operation, and also connects the gas outlet path with the outside world. The outlet path and the clean gas exhaust duct are shut off, and the second operation connects the gas outlet path to the outside world. a double valve body that blocks the flow and communicates the gas outlet path with the clean gas discharge duct. It is characterized by the following:

[0006]

[Effect]

According to the present invention, the dust-containing gas flows into the dust collector body from the dust-containing gas inlet of the dust collector body. When the gas is removed, the dust adheres to the filtration unit and the gas passes through the filter unit, where it is purified and the gas is The clean gas is led to the clean gas discharge duct through the outlet passage and the opening/closing means. Therefore, when dropping dust from a filtration unit with dust attached, When the opening/closing means connected to the unit is operated to close the communication of the discharge duct and communicate with the outside world, , the atmosphere flows back into the gas outlet passage from the opening/closing means and flows back through the unit; Blow off dust adhering to the unit. Then, compressed air is supplied to the unit from the injection pipe. It is injected into the knit to cause expansion and contraction vibrations in the unit, and it adheres to it. Brush off any dust that may be present. In this way, backwashing can be applied to the unit. Once the dust has been removed, the opening/closing means closes the communication with the exhaust duct. When it opens, it closes communication with the outside world and resumes dust collection by the unit. and, For adjacent units, each group is processed in the same manner as above at predetermined time intervals. Next, perform backwashing for a predetermined period of time.

[0007]

【Example】

Hereinafter, embodiments of the present invention will be described based on the drawings. Figures 1 and 2 are overall views showing an example of a dust collector, and the dust collector main body 1 is a rectangular parallelepiped. The body 1 is formed into a single chamber with a shape, and a gas containing dust, that is, a dust-containing gas, is formed at the upper end of the main body 1. A suction opening 2 for suction is provided, and a poppet 3 is provided oppositely below the opening 2. A hopper-shaped dust fall path 4 and a dust collection port 5 are provided at the bottom. A rotary valve 6 for discharging dust is provided in communication with the dust collection port 5, and the support frame 7 is installed on top.

[0008] One side wall 8 of the main body 1 has a vertically long rectangular opening 9 for fitting the filtration unit. are arranged in rows in the horizontal direction and in multiple stages above and below, and a plurality of filters are connected through the fitting/removing ports 9. Each of the overlapping units 10 is fitted into the main body 1 in a cantilevered manner, as shown in FIG. In addition, the unit 10 can be attached and detached by a fixing means 12 via a support pad 11. Ru. In addition, each fitting/unplugging opening 9 is grouped into three horizontal groups, and adjacent groups are The spacing between the mating holes 9 between groups is wider than the spacing between the mating holes 9 within one group. .

[0009] As shown in FIG. 3, the filtration unit 10 can be freely fitted into the fitting opening 9. A filter frame 13 having a frame structure in the shape of a flat box, and a filter frame 13 fitted into the main body 1. A filter material (filter cloth) 14 is stretched to cover the outer periphery of the A clean gas outlet 15 is formed on one side located at the fitting/removal port 9. Also, filtration A suppressing member 16 that prevents expansion of the filtering medium 14 is wrapped around the outer periphery of the filtering medium 14. A plurality of pressure members 16 are arranged in the lateral direction of the filtration unit 10, and as shown in FIG. The material 14 can be subjected to minute vibrations in a divided state. The gas outlet 15 has an upper Venturi tubes 17 are installed at appropriate intervals downward in the same direction as the lateral direction of the filter frame 13. It is worn. The venturi tube 17 is a compressed flow jetting means, and has a compressed flow receiving port 18 and a compressed flow receiving port 18. and a compressed flow outlet 19, and the compressed flow outlet 19 is in a state of entering into the filtration unit 10. It is installed with.

0010 20 is a compressed air injection means, which enters the Venturi tube 17 of each filtration unit 10. A compressed air injection pipe 22 with vertically connected compressed air injection nozzles 21 is connected to a filtration unit. A plurality of pipes are installed in a row in the horizontal direction corresponding to 10, and are connected to the collecting pipe 23 at the upper part. Joint pipe 23 is connected to a compressor (not shown). In addition, the injection pipe 22 and the collecting pipe Between 23 and 23, an injection control section equipped with a solenoid valve 24 is provided, and the injection control section Compressed air is injected at intervals.

[0011] A plurality of gas outlet ports 15 of the filtration unit 10 and A surrounding wall 25 is provided to cover the injection pipe 22, and the surrounding wall 25 and the side wall 8 allow clean gas to be A lead-out path 26 is formed. The outlet path 26 connects the filtration units 10 arranged in parallel. For each group (three rows in the example), a plurality of partition plates 27 provided in the vertical direction It is divided into sections in the direction, and a plurality of (six in the embodiment) dividing paths 26A are constructed. Furthermore, a communication pipe 28 that protrudes outward is connected to the lower end of each division passage 26A, and each division A valve box 30 in which a plurality of valve chambers 29 divided corresponding to the split passages 26A are formed independently is connected. A clean gas discharge duct 31 is connected to each valve chamber 29 of the valve box 30 in a communicating manner. There is.

0012 The valve box 30 is the main body of the opening/closing means 32, and each communication pipe 28 is connected to a side opening of each valve chamber 29. are connected in a communicating manner, and the lower opening of each valve chamber 29 is connected to the above via a flange joint 33. It is connected to duct 31. In the valve chamber 29, as shown in FIG. A communication port 34 to the duct 31 is provided, the upper edge of which serves as a valve seat 35, and the upper side is for air intake. An opening 36 is provided concentrically on the same axis as the communication port 34, and its lower edge is aligned with the valve seat. A valve stem sliding guide 37 is provided at the bottom of the communication port 34 via an arm 38. It is. The upper side of the valve box 30 is provided with an atmosphere that covers the upper part of each of the atmosphere suction openings 36. A suction collection duct 39 is provided, and a suction volume control valve is installed near the air suction port 39A of the duct 39. A maintenance damper 40 is provided, and a top plate 41 of the duct 39 has air intake openings 36 of each valve chamber 29. A valve opening/closing cylinder 42 is installed downward concentrically with the lower end 43 of the piston rod. It has entered duct 39.

[0013] At the lower end 43 of the rod, poppet-shaped upper and lower double valve bodies 44, 45 are concentrically connected. A valve shaft 46 is connected, and the upper valve element 44 opens and closes the atmospheric suction opening 39, and the lower valve element 44 opens and closes the atmospheric suction opening 39. 45 opens and closes the communication port 34 to the duct 31, and when the communication port 34 is fully opened, the atmosphere When the suction opening 36 is fully closed and the communication port 34 is fully closed, the atmospheric suction opening 36 is fully opened. It looks like this. Note that a guide valve rod 47 is connected to the lower end of the valve shaft 46. The valve stem 47 is inserted through the guide 37.

[0014] A door 48 for entering and exiting the filtration unit that can be opened and closed is provided on the front side of the surrounding wall 25. There is. In addition, an exhaust device such as a blower (not shown) is connected to the clean gas exhaust duct 31. has been done. In the above embodiment, the cylinder 42 of the opening/closing means 32 is operated to cause the valve element 44 to draw in atmospheric air. After fully closing the inlet opening 36 and fully opening the communication port 34, start the exhaust fan. Then, the dust-containing gas flows from the suction opening 2 into the main body 1, through the gas outlet path 26, and into the clean gas exhaust duct. The gas is sucked and distributed along the gas flow path leading to the gas flow path 31. Then, the contaminants flowing into main body 1 The heavy dust in the dust gas falls as it is and is discharged through the dust fall path 4, and the light dust is captured by the filter medium 14 of each filtration unit 10 along with the gas, and the outer surface of the filter medium 14 Adheres to surfaces. The gas that has passed through the filter medium 14 and has been purified is sent to each divided path 26A and the communication pipe 28. , the valve chamber 29, and the communication port 34 to reach the clean gas discharge duct 31 and be discharged.

[0015] On the other hand, for each divided path 26A of the gas outlet path 26, the cylinder of the opening/closing means 32 is opened at predetermined time intervals. When the valve body 42 operates and the communication port 34 is fully closed by the valve body 45, the corresponding The injection control section opens the solenoid valve 24, and compressed air from the nozzle 21 of the injection pipe 22 is released. Expanded air passes through the Venturi tube 17, is injected into the filtration unit 10, and is filtered. Momentary expansion and slight vibration occur in the filter material 14, and the dust attached to the filter material 14 is brushed off. At the same time, the air that has flowed back in from the air intake opening 36 is led out from the divided path 26A. Suction flows into the filtration unit 10 through the port 15, passes from the inside to the outside of the filtration medium 14, To actively and surely separate dust remaining on the outer surface of a filter medium 14. This backwash After the cleaning has been carried out for a predetermined period of time, the solenoid valve 24 closes and the cylinder 42 Due to the operation of the valve body 44, the atmosphere suction opening 36 is closed, and the communication port 34 is fully opened. This completes the process and returns to normal dust collection operation. The reverse of such a filtration unit 10 The flow washing operation is automatically performed for a predetermined time at predetermined time intervals for each divided path 26A. Ru.

[0016] Note that during backflow cleaning of the filtration unit 10, the inside of the divided passage 26A is affected by the backflow of air. Therefore, the positive pressure is approximately the same as that inside the main body 1, so the expansion of the filter material 14 due to the injection of compressed air is tension and slight vibrations are reliably generated, and the dust is sufficiently removed by the backflow air in addition to the vibrations. It is efficiently separated and removed, and the filtration function is completely restored. Further, the amount of suction flowing through the atmospheric suction opening 36 is automatically controlled by operating the damper 40. The amount can be adjusted to the optimum amount.

[0017] The present invention is not limited to the above embodiments; for example, the opening/closing means 32 may be , can be installed in each of multiple (for example, two) divided passages 26A to perform backflow cleaning. Ru.

[0018]

[Effect of the idea]

This invention communicates with the outside world during backflow cleaning of the filtration unit to create a positive pressure state and compress Air injection can reliably cause the filter material to expand and generate slight vibrations. Dust is removed smoothly, reliably and efficiently, and powder adhering to the filter material is removed. It is possible to reliably separate and remove dust using backflow air and completely restore the filtration function. It is.

[Brief explanation of drawings]

FIG. 1 is a central longitudinal cross-sectional side view showing an embodiment of the present invention.

FIG. 2 is a front view in half cross section of the center of FIG. 1;

FIG. 3 is an enlarged sectional view of a main part of the filtration unit.

FIG. 4 is an enlarged sectional view of the opening/closing means.

[Explanation of symbols] 1 Dust collector body 2 Suction opening 4 Dust fall path 8 One side wall 9 Insertion/removal port 10 filtration unit 15 Gas outlet 22 Injection tube 25 Enclosure 26 Gas outlet 26A Divided road 31 Clean gas discharge duct 32 Opening/closing means 34 Communication port 36 Atmospheric intake opening 39 Air intake collection duct 40 Damper for adjusting suction amount 44 Valve body 45 Valve body 46 Valve stem

Claims (1)

[Scope of utility model registration request] 1. A filtration unit is provided in a main body having a dust-containing gas inlet and a plurality of clean gas outlet ports, and each of the outlet ports communicates with a gas outlet path. The gas outlet path is connected to a clean gas exhaust duct via a freely openable and closable opening/closing means, and each outlet is provided with compressed air for blowing out compressed air to the filtration unit corresponding to each outlet. In the dust collector equipped with an injection pipe, the opening/closing means, in a first operation, communicates the gas outlet path with the outside world and blocks the gas outlet path and the clean gas discharge duct, and in a second operation, A dust collector comprising a double valve body that, in operation, blocks the gas outlet path from the outside world and communicates the gas outlet path with the clean gas exhaust duct.