JP2005125293A - Rotary jet air blow cleaning apparatus for removing clogging of bag filter cloth - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that, in a conventional method for removing dust adhered to filter cloth for a bag filter, compressed air is blown in from the mouth of the filter cloth by using an air pipe which is provided in advance to a dust catcher or clogging of the filter cloth is removed by using cleaning equipment, but actually the effects of these methods are small, and consequently, most users exchange the filter cloth for new cloth before reaching life time in terms of strengths. <P>SOLUTION: The subject apparatus is provided with an air chamber between an outer tube and an inner tube. Compressed air with increased momentum is injected while being rotated at high speed to attain cleaning over the whole inner circumference of a cylindrical filter, or uniform cleaning of the whole surface of the filter cloth can be attained by making the compressed air ascend and descend. Dust stripping can be improved by intermittently injecting the air while rotating it at high speed to give the filter cloth continuous vibration without causing the filter cloth no strength deterioration. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rotary jet air blow cleaning device that restores air permeability by eliminating clogging of a filter cloth while a bag filter filter cloth is attached to a dust collector.

  Bag filters are used as devices for collecting dust from incinerators and small dust and dioxins mixed in environmental dust.

In the above bug filter, filter cloth may be clogged at an early stage due to dew condensation due to temperature control mistakes or operational troubles.
In that case, even if the filter cloth has not reached the end of its life in terms of strength, it will be in a state where it cannot be filtered unless it is replaced with a new one. For this reason, the cost burden on users is increasing at present.

Conventionally, as a method of removing clogging without deteriorating the strength of the filter cloth, a method using a pulsed air dropping method in which compressed air is jetted from an air tube equipped in a dust collector and a rotary nozzle type cleaning device are used. It was. (For example, refer to Patent Document 1) However, the effect is small, and in reality, the user almost always replaces the filter cloth once clogged with a new one.
JP 2001-259557 A

  The conventional bag filter filter cloth clogging cleaning device described above is not very effective and has a low degree of air permeability recovery.

  The present invention is intended to solve the problem of such a conventional configuration, effectively removes clogging of the bag filter filter cloth, and restores the air permeability without deteriorating the strength of the filter cloth. The purpose is to make it.

  In order to achieve the above object, the present invention provides an entire apparatus having an outer diameter smaller than the inner diameter of the bag filter filter cloth, and supplies compressed air by connecting an air hose connected to the compressor to the inlet of the inner cylinder. Then, while rotating at a high speed, while maintaining the power intermittently and continuously, compressed air is sprayed from the spray hole of the outer cylinder onto the filter cloth cleaning surface to blow away dust adhering to the outside of the filter cloth.

With the filter cloth attached to the dust collector (bag filter), the device is inserted from the filter cloth mouth, and the compressed air sent to the inner cylinder passes through the filling chamber in the inner cylinder with the air hose suspended. The outer cylinder comes out of the two holes on the diagonal and is compressed into the air chamber between the inner cylinder and the outer cylinder, and the outer cylinder is forced to escape to the two injection holes (outlets) of the outer cylinder. Rotate.
In addition, the two holes in the outer cylinder were angled in one direction, and bearings were mounted on the top and bottom to enable smooth high-speed rotation.

In addition, the air that is compressed and filled in the air chamber between the outer cylinder and the inner cylinder loses its place for a moment, and when the holes of the inner cylinder and the injection holes of the outer cylinder are aligned, A large dynamic pressure works by obtaining a strong momentum, and high-speed compressed air is instantaneously injected from the injection hole of the outer cylinder.
And this mechanism is repeatedly performed by rotating.

  Furthermore, by making the hole diameter of the injection hole of the outer cylinder a little smaller than the diameter of the injection hole of the inner cylinder, the wind speed of the compressed air becomes faster and more dust (particles) adhering to the filter cloth is blown away. be able to. Further, by slightly shifting the positions of the two holes of the outer cylinder injection hole from the diagonal, the structure can perform injection while maintaining a strong dynamic pressure without losing the momentum of the compressed air.

  Moreover, since the spray interval is shortened by rotating at high speed, and the time when the compressed air hits the same surface of the filter cloth becomes instantaneous, the filter cloth is hardly damaged and the strength is hardly deteriorated.

  In addition, by increasing the injection dynamic pressure, the tapping vibration applied to the filter cloth is increased, and it is attached to the outer surface of the filter cloth due to the synergistic effect of shaking vibration caused by the reaction of the compressed air injected while rotating on the filter cloth. Cracks are generated in the dust layer or lifted to promote dust separation.

  In addition, as a preventive measure to prevent the filter cloth from directly contacting the filter cloth and causing damage or damage to the filter cloth, it has an outer diameter smaller than the inner diameter of the filter cloth and is slightly larger than this apparatus. Attach a protector (lattice) to maintain a safe distance from the filter cloth. And, it was made possible to perform the rotational jet air cleaning safely over the entire surface of the filter cloth cylinder.

  As described above, the bag filter filter cloth cleaning device of the present invention is a device that can recycle the filter cloth by removing the adhered dust and restoring the air permeability uniformly without deteriorating the filter cloth. .

In addition, early filter clogging of bag filter filter cloth due to operational troubles and further improvement of normal product life will be achieved, and new filter cloth fee, replacement work cost and old filter cloth disposal cost will be reduced.
In particular, it exhibits the effect of recycling industrial waste (old filter cloth) containing dioxins, which requires high disposal costs.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In the figure, 1 is an inner cylinder, and a rotary nozzle device in which upper and lower bearings 5 are supported and integrated with an outer cylinder of 2, and the end of an air hose in which the upper part 8 of the inner cylinder 1 is connected to a compressor. Connect with the part and blow in compressed air

  7 is an air filling chamber made by hollowing out the inside of the inner cylinder 1, and the filled compressed air comes out of the blowout holes of 4 and is compressed and filled in the air chamber of 6, and then the angle of the outer cylinder 2 is increased. It is ejected intermittently vigorously while rotating at high speed from the injection hole 3 that is vacated.

  The diameter of the 3 injection holes is slightly smaller than the diameter of the 4 blowing holes and is slightly shifted from the diagonal line. This is to increase the wind speed of the jet air and to enable continuous strong jet without loss.

  Hereinafter, the operation of the above configuration will be described. After the compressed air supplied from the upper part 8 of the inner cylinder passes through the air filling chamber 7 of the inner cylinder, passes through the blowing hole 4 and is compressed and filled into the air chamber 6, The outer cylinder is rotated by a force to escape to the outer cylinder injection hole 3, and the injection hole 3 is rotated at an angle in one direction, and the upper and lower bearings 5 are rotated at high speed. .

Further, when the blowout hole 4 of the inner cylinder and the injection hole 3 of the outer cylinder are aligned, a strong momentum is instantaneously obtained and strong total pressure air is injected from the injection hole 3.
Then, the compressed air is compressed and filled in the air filling chamber 7 and the air chamber 6 of the inner cylinder until the line is aligned again, and the same operation is repeated.

  Examples of the present invention will be described below.

  In this embodiment, bag type filter cloth φ155 mm × L4,500 mm 320 which was clogged early due to operational trouble was subjected to rotary jet air blow cleaning.

  As a result, even after 17 months have passed since the clogging of the filter cloth was eliminated, the filter cloth is still used without any problems.

Sectional view of a rotary jet air blow cleaning device showing an embodiment of the present invention AA line sectional view of the same device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner cylinder 2 Outer cylinder 3 Injection hole 4 Outlet 5 Bearing 6 Air chamber 7 Filling chamber 8 Compressed air supply port

Claims (5)

  The air chamber provided between the inner cylinder and the outer cylinder is filled with the air supplied to the inner cylinder from the hose connected to the compressor, and exits from the two holes formed diagonally. After being compressed and filled, the outer cylinder begins to rotate due to the force to escape to the two injection holes of the outer cylinder, and at that time, the rotation is smoothed by the effect of the bearings mounted on the top and bottom of the outer cylinder, A rotary jet air blow cleaning device for removing clogging of a bag filter filter cloth, characterized in that air is jetted while rotating at a high speed by providing an angle to the jet hole.   The air compressed and filled in the air chamber provided between the inner cylinder and the outer cylinder is strong when the outer cylinder rotates and the blowout hole of the inner cylinder and the hole of the outer cylinder are aligned. A jet air blow cleaning device that obtains a momentum and further reduces the injection hole diameter of the outer cylinder smaller than the hole diameter of the inner cylinder, resulting in a strong injection dynamic pressure and rotating intermittently at a high speed.   Due to the effect of high-speed rotation, even if the spray interval is shortened and high compressed air continuously hits the filter cloth, the inner surface of the filter cloth (clean The rotary jet air blow cleaning device for removing clogging of the bag filter filter cloth according to claim 1, wherein dust is blown off from the surface) to restore air permeability.   Along with the increase in jetting dynamic pressure and rotation speed, the swaying action caused by the reaction of air inside the filter cloth (inside the cylinder) is increased along with the increase of the striking vibration applied to the filter cloth, and the dust layer attached to the outer surface of the filter cloth is cracked 4. A rotary jet air blow cleaning device for removing clogging of a bag filter filter cloth according to claim 1, wherein the dust filter promotes dust peeling by generating or floating.   As a protective measure to prevent the device from coming into direct contact with the filter cloth and causing damage, a grid-shaped protector having an outer shape smaller than the inner diameter of the filter fabric and having a size slightly larger than the device is about 5 mesh. Is attached to the apparatus, and the inside of the filter cloth is moved up and down while maintaining a safe distance from the filter cloth, and compressed air is jetted over the entire inner surface of the filter cloth to restore the air permeability. 3. A rotary jet air blow cleaning device for removing clogging of the bag filter filter cloth according to 3.4 and 5.

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