JPS5836612A - Gas filtering construction of air duct equipped with cleaning mechanism - Google Patents

Abstract

PURPOSE:To enhance filtering efficiency, by rotating a rotary filter rotating in the direction perpendicular to an air flow, between a collecting zone and a cleaning zone, and removing the collected matters attached to the surface of the filter in the collecting zone. CONSTITUTION:A titled filtering construction consists of a rotary filter 30 having a lot of sector-shaped filters 32 divided by partition walls 31 which are rotated in the direction perpendicular to an air flow 11A of an air duct 11 and are formed radially from its rotating center, and a fixed frame 21 and a cleaning chamber 40. Above-mentioned frame 21 has circular notches divided into a collecting zone 22A and a cleaning zone 22B by a rotating filter 30 and air sealing plates 23 and 24 formed radially from its center. Further, air passes through the above-mentioned chamber 40 in opposite directions to the air flow 11A of the air duct 11. Thus, matters collected in the zone 22A are removed in the zone 22B.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air duct) O gas filtration structure equipped with a cleaning mechanism. For example, in general air conditioning or dust collection systems, various filter devices are used to convert dirty gas into clean air. Many of this type of filter devices are fixed type, but especially in factories, there are many impurities mixed into the air, so the filter surface should be periodically cleaned to prevent a decrease in filtration efficiency due to filter O clogging. It is necessary to perform the following rituals. In addition, for example, in powder drying equipment using hot air,
Since a large amount of powder, which is a dry substance, is mixed into the exhaust gas, dispersing it into the atmosphere in this state poses a big problem in terms of pollution control such as air pollution and the recycling of raw materials. Furthermore, recently, exhaust heat exchangers have been installed in the supply and exhaust systems of air ducts to exchange exhaust heat with the supply air. has a large influence in relation to heat exchange efficiency.

This invention has been proposed in view of the above circumstances, and provides a novel gas filtration structure equipped with a cleaning mechanism, and in particular, a filtration mechanism that enables the recycling of gaseous substances collected by the filter. This is what I am trying to do. Specifically, the present invention relates to a rotary filter that is rotated by a drive device in a direction perpendicular to the airflow of an air duct and has a large number of fan-shaped filter surfaces divided by partition walls formed radially from the center; A fixed frame around which the filter rotates and has a circular cutout formed from the center toward the outer circumference and divided into a collection zone and a cleaning zone by nine air seal plates, and a front cutout of the air seal plate of the fixed frame. A cleaning chamber is formed, through which an airflow passes in the opposite direction to the airflow of the air duct, so that the substances collected in the collection zone as the rotary filter rotates are removed from the filter surface in the cleaning zone. This is achieved by making the Hereinafter, a detailed explanation will be given according to examples.

FIG. 1 is an overall schematic system diagram showing an example in which the gas filtration structure of the present invention is applied to a powder drying apparatus. In the figure, 10 is an air supply duct, 11 is an exhaust duct), 12 is a heater, 13 is a dryer main body, 14 is a cyclone type hopper, 15 is a raw material collection silon installed in the exhaust gas duct, and 16 is a This is a known rotary waste heat exchanger that exchanges heat in exhaust gas with supply air. The filtration structure according to the present invention has a filter main body 20 installed in an exhaust duct ill, and a cleaning chamber 40, as indicated by an arrow mark 19 in the figure.
It consists of The cleaning chamber 40 is connected to the air supply duct 10 by a conduit 18 and 7 am F.
As shown in the figure, the airflow is configured so that the airflow passes in the opposite direction to the airflow direction of the exhaust gas. In addition, in this embodiment, a regenerated raw material conduit 1f is provided for introducing the dry matter collected by the filter 20 into the dryer again,
In addition to filtration of exhaust gas, efforts are being made to reuse raw materials.

FIG. 2 is an enlarged sectional view of a portion 19 in FIG. 1,
This figure shows the specific structure of this invention.

The filter main body 20 is composed of a fixed frame 21 and a left-rotating filter 30, and is installed perpendicular to the airflow direction 11A of the exhaust duct 11, as is clearer from the drawings from FIG. 3 onwards. The fixed frame 21 has a circular notch 22 in which the rotary filter 30 rotates, as shown in FIGS. 3 and 4, and the circular notch 22.
The circular notch 2
2 is divided into a collection zone 22m and a cleaning zone 22B.

The ratio of the collection zone 22M to the cleaning zone 22B can be set arbitrarily, but in order to increase the collection efficiency of the filter, a ratio of about 3:1 as in the embodiment is preferable.

Air seal plate 2! Rotating filter 3 on the inner side of S, 24
Flocked portions 25.25 are formed on the sliding surface of 0 to prevent near leakage between the collection zone 22m and the cleaning zone 22B.

In FIG. S and FIG.
28 is a chain, and 29.29 is a sprocket.

The rotary filter 30 therefore rotates in a direction perpendicular to the airflow direction 11A of the exhaust duct 11, and as shown in FIGS. 5 and 6, nine partition walls 31 are formed radially from the center. A large number of fan-shaped filter surfaces 32. :SB... is divided. This interval Wirsx*sx-... is the rotation filter 3
In addition to increasing the strength of the rotary filter itself, the problem of troublesome near leakage occurring between the collection zone 22A and the cleaning zone 22B due to the rotation of the rotary filter is avoided. Therefore, the partition wall 31 is the outer cylindrical portion 3 of the rotary filter 30.
It is preferable that the width of the filter surface 3 is the same as that of the filter surface 3.
2 is formed approximately in the middle position. In the figure, 34 is a rotating shaft.

Next, returning to FIG. 2 and explaining the cleaning chamber 40, this cleaning chamber 40 is formed across the front and back of the air seal plates 25 and 24 of the fixed frame 21, and the chamber has an 11-m gap in the air flow direction of the exhaust duct. airflow in the opposite direction], l B is configured to pass through. Therefore, an air inlet 41 and an air outlet 42 are formed on the rear side and the front side of the filter body 20, respectively. Optionally, the outlet 42 can be connected to the recycled material conduit 1f described above. Reference numeral 44 in the figure is a partition wall that partitions the chamber.

Incidentally, as shown in FIG. 2, it is preferable to install a jet air nozzle 45 in the cleaning chamber for periodic cleaning of the filter surface. This air nozzle 45 has four cleaning water conduits connected to an air conduit 46 to clean the filter surface.

In the gas filtration structure of the present invention having the above configuration, the rotating filter that rotates in a direction perpendicular to the airflow in the air duct continuously rotates between the collection goon and the cleaning zone. Therefore, the collected matter adhering to the filter surface at the collection sheet is removed from the filter surface in the running zone through which the airflow in the opposite direction passes. The filter surface is then rotated again to the collection zone in a cleaned state, where it is continuously returned to the collection zone. For reference, the rotational speed of the rotary filter in the embodiment is 11 KIO rotations per minute, and this speed can be set to any value depending on the drive motor.

Ko0IAIIIl! In this way, the filter can be used with extremely high filtration efficiency at all times, so it has high performance as a gas filtration device. Due to its high performance, it is used not only for general air conditioning or dust collection systems, but also for air conditioning in sterile rooms, animal breeding rooms, etc. (9) In particular, in powder drying equipment as mentioned in the examples, it is possible to regenerate the raw material by cleaning the exhaust gas, collecting the dried raw material with a filter, and circulating it back into the drying equipment. Become.

In addition, as described in the Examples, if this invention is used for pretreatment of exhaust gas in an exhaust heat recovery system, the heat exchange efficiency of the exhaust heat recovery machine can be greatly improved. The uses are extremely large.

[Brief explanation of the drawing]

Fig. 1 is an overall schematic system diagram showing an example in which the gas filtration structure of the present invention is applied to a powder drying device, Fig. 2 is an enlarged sectional view of the main parts thereof, and Fig. 3 is a main body of the filtration device of the present invention. FIG. 1 is a front view of the fixed frame, FIG. 1 is a sectional view taken along the line 4--4, FIG. 5 is a front view of the rotary filter, and FIG. 6 is a sectional view taken along the line 6-6. lO...Air supply duct, 11...Exhaust duct, 20.
-・filtration device main body, 21... fixed frame, 22
...-Circular notch, 22A... Collection zone, 22B
- Cleaning zone, 23. 24 Air seal plate, 25... Flocking section, 2 feet... Drive motor, 30... Rotating filter, 31... Partition wall, 32... Fan-shaped filter surface, 40...Cleaning chamber/bar, 41...Air inlet, 42...Air outlet, 4
5...Jet air nozzle. Agent for patent applicant Howa Giken Kogyo Co., Ltd.

Claims (1)

[Scope of Claims] A rotating filter that is rotated by a driving device in a direction perpendicular to the airflow of an air duct, and that is formed radially from the center and that is divided by nine partition walls and has nine fan-shaped filter surfaces; and the rotating filter. a fixed frame that rotates and is divided into a collection zone and a cleaning zone by an air seal plate formed from the center toward the outer periphery, and has nine circular notches; The cleaning chamber includes a cleaning chamber through which an airflow passes in the opposite direction to the airflow of the air duct, and the substances collected in the collection zone as the rotary filter rotates are removed from the filter surface in the cleaning zone. An air duct gas filtration structure with a cleaning mechanism.