JPS61283322A - Apparatus for cleaning filter cloth - Google Patents

Abstract

PURPOSE:To obtain the titled apparatus not requiring the operation of a cleaning change-over valve, by providing a cleaning air jet pipe having a large number of air jet orifices to the center of filter cloth in the axial direction. CONSTITUTION:The exhaust gas flowed in through an exhaust gas inlet 7 rotates along the inner wall of a main body casing and subsequently flows toward the inside center of the casing 4 and passes through filter cloth 3 to remove foreign matters in the gas. The purified exhaust gas passes the central part to be guided to the exhaust gas outlet 8 provided to the lower part of the casing 4 and flows out to the outside of the apparatus. A cleaning air jet pipe 5 having a large number of air jet orifices in the axial direction thereof is suspended in coaxial relation to the center of the filter cloth 3 so as to be capable of being rotated by a drive apparatus 10. Therefore, foreign mattes adhered to the inside of the filter cloth 3 are blown off by the air injected through the jet pipe 5 to be gathered in the vicinity of a foreign matter exhaust port 9 and can be discharged during the operation.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to general filtration devices such as cloths and nets, and catalytic combustion devices such as cloths and nets.

Conventional technology Conventionally, if a filtration cloth or combustion catalyst cloth becomes clogged during operation, the operation must be temporarily stopped and cleaned, or two filtration devices must be installed in advance and the cloth must be constantly operated. It was operated with only one unit, which caused clogging and had a cleaning effect. In this case, the former requires temporary suspension of operation for cleaning, which has a serious impact on operations. In addition, in order to operate the furnace without affecting the operation, it is necessary to equip two temporary devices and four large switching valves for exhaust gas switching in advance, which makes the installation cost expensive. The space will also be too large.

FIG. 3 shows the relationship between the conventional filtration device 1 and the flow of exhaust gas. In this case, it is necessary to temporarily stop operation and clean the filtration device. Fig. 4 is equipped with two flow-through devices l and four switching valves 2, and there is no need to stop operation, but the equipment cost is high, the installation area is large, and the switching valves cannot be operated. −
operation is complicated.

Problems to be Solved by the Invention As mentioned above, when there is only one filtration device, it is necessary to temporarily stop operation and clean the filtration device, and when two filtration devices are used, four additional switching valves are required. Therefore, equipment costs are high and the installation area is large.

Means to Solve the Problems In order to solve the above-mentioned problems, the present invention provides an exhaust gas inlet in the main casing, a zigzag circular filter cloth in the center of the main casing, and a filter cloth in the lower center of the filter cloth. A filtration cloth cleaning device which cleans the outer surface of the filtration cloth by rotatably providing a cleaning air jetting pipe having a large number of air jetting holes in the axial direction at the center of the filtration cloth. Proposed.

Embodiments The present invention will be explained by way of embodiments shown in the accompanying drawings. In FIGS. 1 and 2, an exhaust gas lower is provided on the upper wall of the vertical cylindrical main body casing 4, and a zigzag-shaped circular filtration cloth or catalyst cloth 3 (hereinafter referred to as filtration cloth) is provided inside. An exhaust gas outlet 8 is provided in the lower part of the inside of the filtration cloth 3. A cleaning air jetting pipe 5 having a large number of air jetting holes in the axial direction is suspended coaxially with the center of the filtration cloth 3 by a bearing, and the cleaning air jetting pipe 5 is connected to a cleaning air supply pipe 6, and the worm , a drive device 10 such as a worm wheel
A foreign matter discharge port 9 is provided on the outer periphery of the main body casing 4. The cleaning air jetting pipe 5 and the air supplying pipe 6 are connected by a sliding joint, and even if the cleaning air jetting pipe 5 rotates, the air supplying pipe 6 slides on the joint without swinging around, so there is no need to force it. No force is applied.

Working Exhaust gas The exhaust gas flowing in from the lower part rotates along the inner wall of the main body casing 4, then flows toward the center of the inside, and passes through the filtration cloth 3, whereby foreign substances in the exhaust gas are removed and purified. The generated exhaust gas passes through the center, is guided to the lower exhaust gas outlet 8, and flows out of the device.

The air ejected at high speed from the cleaning air jet pipe 5 flows back into the exhaust gas flow and reaches the filter cloth, blowing off foreign matter adhering to the outside of the filter cloth 3, and the blown foreign matter is sent to the foreign matter outlet 9.
It collects nearby and can eject foreign objects during operation. Further, since the cleaning air ejection pipe 5 is connected to the air supply pipe 6 and uses a sliding joint even when rotated, the air ejection pipe 5 can rotate cleanly.

Effects of the Invention Since the present invention has the above-described configuration, the filter cloth can be cleaned during operation. Furthermore, compared to the system shown in FIG. 4 that uses two filters and can perform cleaning operations during operation, the equipment cost is lower and the installation area is smaller. Moreover, the amount of cleaning air is small and the cleaning action is extremely simple. The reason for this is that the amount of air required is small because the cleaning medium air is ejected only on one plane of the radiation surface.

[Brief explanation of drawings]

Fig. 1 is a plan view of the filtration cloth cleaning device of the present invention;
3 is an explanatory plan view of a conventional example in which two filtration cloths are used, and FIG. 4 is an explanatory plan view of a conventional example in which two filtration cloths are used.

Claims (1)

[Claims] In a device in which an exhaust gas inlet is provided in the main casing, a zigzag circular filtration cloth is provided in the center of the main casing, and an exhaust gas outlet is provided in the lower center of the filtration cloth,
A cleaning device for a filtration cloth, which cleans the outer surface of the filtration cloth by rotatably providing a cleaning air jetting pipe having a large number of air jetting holes in the axial direction at the center of the filtration cloth.