JP5694637B2 - Auto-regenerative air filter - Google Patents

Description

  The present invention relates to an automatic regenerative air filter that filters and collects contaminated air in underground malls, subway stations, department stores, factories, and the like.

  In general, this type of auto-regenerative air filter has an air filter medium set in the ventilation section that opens in the front-rear direction of the main body of the device so as to block the entire surface, and the filtered air of the air filter medium is sent from the front. Collecting dust. In such an automatic regenerative air filter, when polluted air such as underground streets, subway stations, department stores and factory exhaust gas with relatively high dust concentration is collected by filtration, the amount of dust and lint in the gas is large. Since the pressure loss resistance of the filtration surface portion of the filter medium immediately increases and the filtration efficiency is lowered, it is necessary to frequently clean the filtration surface portion by advancing the cleaning time of the air filter medium.

  Also, if the processing gas contains fumes together with dust or separately, wet dust is stuck to the filtration surface of the air filter media and the pressure loss is lost even though the dust collection capacity is not reached. Since the resistance rapidly increases, there is a serious problem in terms of running cost because the usable period of the air filter medium is short and the air filter medium must be regenerated frequently.

Furthermore, since it is necessary to frequently clean the filter surface portion of the filter medium, the strength of the filter medium itself must be increased, and a relatively thick fiber having a large fiber diameter, for example, 60 to 70 μm must be selected. There wasn't. For this reason, only a collection rate of 60 to 70% can be obtained by the mass method, and this is not always satisfactory when considering prevention of contamination of the air conditioner coil. Therefore, more efficiency is required.
For this reason, attempts have been made to extend the life of equipment by protecting the equipment by installing a medium performance air filter, etc., after the auto-regenerative air filter. Due to problems such as cost, it is desired to improve the performance of the auto-regenerative air filter.

  The present invention is intended to solve the above-described problems. First, an object of the present invention is to provide a filter medium having a long usable period of air filter medium and a high collection rate.

  Next, an object of the present invention is to improve the filtration efficiency by suppressing the increase in pressure loss resistance of the filtration surface portion as much as possible even when the dust concentration of the contaminated air to be treated is high and dust, lint, fumes, etc. are mixed. It is what I did.

  Furthermore, an object of the present invention is to extend the cleaning time of the air filter medium to reduce the running cost and to make the air filter medium have a long life.

  Furthermore, an object of the present invention is to extend the life of the equipment and maintain the performance by protecting the equipment installed at the subsequent stage of the automatic regeneration type air filter.

  The solution of the present invention is characterized in that the performance of the air filter medium set so as to block the entire surface of the ventilation portion opened in the front-rear direction of the apparatus main body is improved.

  Another solution of the present invention is characterized in that the air filter medium is made of fine fibers such as polyester and knitted from synthetic fibers having a fiber diameter of 5 to 80 μm.

  Another solution of the present invention is characterized in that at least two types of air filter media including a mixed fiber having a fiber diameter of 5 to 50 μm or a mixed fiber having a fiber diameter of 50 to 80 μm are used.

  Another solution of the present invention is characterized in that the pile length of the fibers of the air filter medium is adjusted to 12 to 18 mm.

  Another solution of the present invention is that the fibers of the air filter medium are knitted in order to plant them on the base fabric, and are fixed with a binder such as acrylic so that the pile does not fall off, or separately by using an electric flocking, etc. It is characterized by planting and fixing.

  Another solution of the present invention is characterized in that a flame retardant such as a halogen agent is placed in a fixed binder and processed.

  Here, the air filter medium is not particularly limited, and for example, a woven or nonwoven fabric of synthetic fibers such as polyester, polyamide, polyethylene, rayon, vinylidene chloride, glass fiber, or the like is used.

  The fixed binder is used by adding an appropriate amount of a flame retardant such as a halogen agent to a mixed binder obtained by adding an organic binder or an inorganic binder alone or mixed.

  The base fabric has a mesh structure and synthetic fibers are used.

The operation is as follows. That is, the dust in the air sucked by the air intake operation of the air conditioner is collected by the air filter medium and passes through the apparatus main body as clean air. At this time, since the air filter medium has improved the collection rate, the particle size of the dust in the clean air is finer and the amount of dust is considerably reduced. Therefore Ru can be accomplished a long life of the device by installing the protection device in the subsequent stage.

  By repeating such an operation, dust accumulates on the surface of the air filter medium, and pressure loss resistance increases. When the pressure loss resistance rises to a certain value, the filter medium regeneration port of the filter medium regeneration device starts to operate by the nozzle drive device, moves the front of the air filter medium up and down, left and right, dust collected in the air filter medium, etc. The dust is removed by suction so as to remove it from the filtration surface as much as possible without leaving the dust. As a result, the rapid increase in the pressure loss resistance of the filtration surface portion is suppressed, and the suction operation is stopped without stopping.

  Further, the collected dust removed by suction is processed by a regenerating dust collector such as a cyclone or a small bag dust collector through a flexible hose connected to the dust regenerating port.

(1) Since the air filter medium has been improved in performance, the particle size of the dust has become finer in the clean air that has passed through the back of the filtration surface, and the amount of dust has been considerably reduced. By protecting the installed equipment, it is possible to extend the life of the equipment and maintain performance such as thermal efficiency.
(2) Air filter media has a three-dimensional structure with a very high space ratio with the same direction as the hair, and uses a base fabric that has high tensile strength and does not stretch. In addition, it can be reused for removing collected matter and can withstand long-term use.
(3) Even if the dust concentration of the contaminated air to be treated is high and fumes are mixed, the dust collected on the filter surface of the filter medium is not left as it is, but is removed by the filter medium regeneration device, and the pressure loss resistance of this filter surface section As a result, the efficiency of filtration can be improved, and the renewal period of the filter medium can be greatly extended to reduce the running cost.
(4) Regeneration of the filter medium can be performed mechanically while in the intake operation, and labor and time are not required when replacing the filter medium, and maintenance management is very simple.
(5) Even in places with relatively high dust concentrations such as underground malls, subway stations, department stores, and factory exhaust gas, it is advantageous in terms of replacement frequency of filter media and operating costs.

It is a front view showing the present invention. It is the side view seen from A arrow of FIG. It is a rear view which shows this invention.

  Hereinafter, an automatic regeneration type air filter of the present invention will be described in detail with reference to the drawings.

  First, reference numeral 1 denotes a device body of an automatic regeneration type air filter. This device body 1 is a vertical type and has a U channel frame shape with a narrow front and rear width, and its central portion is a ventilation portion having a large opening in the front and rear direction. Yes. A filter medium 3 in which fibers having a fiber diameter of 15 to 40 μm and a length of about 15 mm are woven by weaving hair is attached to and fixed to the rear surface side of the apparatus main body 1. Further, on the downstream side of the filter medium 3, a mesh-like metal fitting 4 that prevents the filter medium 3 from being blown off by an air current, that is, a grating, is attached.

  A filter medium regenerator for removing dust adhering to the filter medium 3 while moving up and down and left and right is attached to the front side of the ventilation section of the apparatus main body 1.

  That is, the playback frame drive chain front cover 5 is attached around the front side of the ventilation portion of the main body 1, and the playback frame drive chain front cover 5 is attached to the upper, lower, left, and right corners of the playback frame drive chain front cover 5. A main shaft 6a, a tension sprocket 6b, a sub shaft 6c, a tension sprocket 6d, a free wheel 6e, and a tension sprocket 6f are provided, respectively. Reproduction frame drive chains 7a and 7b and a reproduction port drive chain 7c are hung between the wheel 6e and the tension sprocket 6f, respectively. Also, a vertical movement drive motor 8 is attached to an upper portion of one side of the front cover 5 of the reproduction frame drive chain, and the main shaft 6a is connected to the vertical movement drive motor 8 via the reproduction frame drive chains 7a and 7b and the reproduction port drive chain 7c. A drive sprocket (not shown) that is coaxial with the drive frame is driven so that the playback frame drive chains 7a and 7b and the playback port drive chain 7c reciprocately rotate in a series of states. Then, both ends are connected to the playback frame drive chains 7a and 7b arranged on the left and right sides, and the playback frame 9 is horizontally mounted, and is moved up and down by the reciprocating rotation of the playback frame drive chains 7a and 7b. It is like that. The reproduction frame 9 is reciprocally driven by a tension sprocket 10 provided to be linked to one of the tension sprockets 6f via a free wheel 6e attached to both ends and a tension sprocket 6f. It is like that. A dust regeneration port 11 is disposed on the reproduction frame 9 in a state of being connected to the regeneration port drive chain 7c, and the dust regeneration port 11 is guided and supported by the reproduction frame 9 by reciprocating rotation of the regeneration port drive chain 7c. However, it is configured to be moved in the left-right direction. The dust regeneration port 11 is activated by a nozzle driving device (not shown) activated by a timer, and the dust collected on the filter medium 3 is removed by suction. The dust regeneration port 11 is connected via a flexible hose 12 to a recycle dust collector (not shown) such as a cyclone or a small bag.

  Next, the operation of the above-described configuration will be described. Contaminated air sent from the front of the apparatus body 1 to the ventilation portion is filtered and collected by the filtration surface portion of the filter medium 3, and dust in the contaminated air is collected by the filtration surface portion. The collected and cleaned air passes backwards. During such dust collection operation, the vertical movement drive motor 8 of the filter medium regenerator attached to the front side of the ventilation section of the apparatus main body 1 is actuated to move the regenerative frame 9 up and down at an appropriate speed and tension sprocket as described above. 10 operates to move the dust regeneration port 11 in the left-right direction. As a result, the dust regeneration port 11 sucks and removes dust such as dust and fumes collected on the filtration surface portion of the filter medium 3 without leaving them. The dust removed by suction is processed through a flexible hose 12 by a recycle dust collector (not shown) such as a cyclone or a small bag.

  As a result, the pressure drop resistance of the filtration surface portion of the filter medium 3 does not increase suddenly even if the filtered air is collected by collecting polluted air such as underground streets, subway stations, and department store ventilation, which have a relatively high dust concentration. The running cost can be greatly reduced.

  In the present invention, by providing a high performance air filter medium in the conventional auto-regenerative air filter, the particle size of the dust in the clean air that has passed through the air filter medium is made finer, and the amount of dust is considerably less. By doing so, it is possible to prolong the service life and improve the efficiency of the equipment by protecting the equipment installed in the subsequent stage, which is extremely large in practical use.

DESCRIPTION OF SYMBOLS 1 ... Main body 2 ... Base cloth 2 3 ... Filter material 4 ... Grating 5 ... Reproduction frame drive chain front cover 6a ... Main shaft 6b ... Tension sprocket 6c ... Sub Shaft 6d ... Tension sprocket 6e ... Free wheel 6f ... Tension sprocket 7a, 7b ... Regeneration frame drive chain 7c ... Regeneration port drive chain 8 ... Vertical drive motor 9 ... Regeneration Frame 10 ... Tension sprocket 11 ... Dust regeneration port 12 ... Flexible hose

Claims (1)

So as to block the entire surface ventilation part which opens in the longitudinal direction of the apparatus main body, and sets the air filter media, performs contaminated air filtration dust collector that is passed through feed from the front by filtration face of the filter medium,
A dust regeneration port is provided to suck and remove the dust collected on the filtration surface of the filter medium,
When the pressure loss resistance of the filter surface of the filter medium rises above a predetermined value, the filter medium removes the dust collected by the filter surface of the air filter medium by suction while moving the dust regeneration port up and down, left and right on the front side of the ventilation section of the device body. In the auto-regenerative air filter configured with a regenerator,
A base fabric having a network structure using synthetic fibers as the air filter medium has a pile length of 12 to 18 mm, is composed of fine fibers, and a mixed fiber having a woven hair fiber diameter of 5 to 50 μm and 50 to 80 μm. Using two kinds of blended fabrics, we knitted and woven the base fabric so that it has a three-dimensional structure with a very high space ratio with the same direction as the hair , fixed with a binder, and regenerated the filter media. An auto-regenerative air filter characterized in that it can be mechanically operated during intake operation .

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