JPH10216414A - Automatic filter cloth washing device for filter press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set operation of a nozzle header at a stable speed, to eject a specified volume of washing water and to execute effective washing of deposits by allowing a traversing truck and a traveling truck on which this nozzle header is mounted to travel by driving motors. SOLUTION: The traversing truck 3 is driven to traversely move back and forth by a rodless cylinder driven by the air pressure alone or the liquid converted to a pneumatic oil pressure. The nozzle header 4 may be swiveled in forward and backward directions of 90 deg. and 180 deg. by means of the rotary actuator driven by the air pressure alone or the liquid converted to the pneumatic oil pressure mounted at the traversing truck 3. At the time of washing filter cloth, the nozzle header 4 swivels 90 deg. and descends with the horizontal direction as a start point, then stops. High-pressure injection is executed via the nozzle header 4 by using a high-pressure pump together with the traversing truck, by which the washing of the filter cloth is executed. As a result, the efficient washing of the filter cloth is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a filter used for filtration in a filter press used for solid-liquid filtration of various slurries generated in steel, construction, water supply, sewage, quarrying and various other industrial fields. Reducing clogging of cloth,
The present invention relates to a filter cloth automatic cleaning apparatus effective for filter cloth cleaning performed for maintaining filtration performance recovery.

[0002]

2. Description of the Related Art Conventionally, in a filter press used for filtering and separating a slurry into a dewatered cake and a liquid, when dehydration → opening of the filter plate (cake discharge) is repeated, a filter for filtration mounted on the surface of the filter plate is repeatedly used. A part of the dewatered cake that has not been peeled off on the cloth and solids in the slurry are precipitated or fixed to cause clogging, thereby deteriorating the dewatering performance. Therefore, it is necessary to wash the filter cloth in order to reduce clogging of the filter cloth, recover and maintain the filtration performance, and various automatic filter cloth cleaning apparatuses have been invented.

That is, as a conventional technique, for example, an apparatus having the following structure has been invented and put into practical use. FIG. 6 is a front view and a side view showing a conventional filter cloth automatic cleaning device.
FIG. 6 (a) shows a filter cloth automatic cleaning device of a header tube vertical direction operation type, and FIG. 6 (b) shows a swing operation type filter cloth automatic cleaning device. (1) As shown in FIG. 6A, the cleaning device runs on the traversing rail 8 installed above the filter plate 11, and the cleaning water nozzle header of the cleaning device blows out the cleaning water from the cleaning nozzle 10. This is a so-called header tube up / down operation type filter cloth automatic cleaning device that moves up and down directly in a straight line by driving a cylinder and screws. (2) As shown in FIG. 6 (b), the cleaning device runs on a rail 8 installed below the filter plate 11, and at the time of cleaning, the cleaning water is blown out while blowing up the cleaning water spray header 4 while standing up. There is a so-called swing operation type automatic filter cloth cleaning apparatus for performing the above operation to clean the entire filter cloth.

[0004]

When the above-mentioned prior art filter cloth automatic cleaning apparatus is used, the aforementioned prior art (1) is used.
In the equipment shown in (1), a washing device is installed above the filter press, and the washing water spray header moves up and down from the upper part to the lower part of the filter plate. After washing the filter cloth, it is necessary to release all of the washing water spray header from the filter plate before moving on to the filter cloth cleaning of the next filter chamber. There is a disadvantage that the cycle time is long.

In the apparatus shown in the prior art (2), a washing device is provided below the filter press, so that during washing, washing water and a part of the dewatered cake adhered to the filter cloth and slurry fall directly onto the washing device. In addition, the dewatered cake adheres to the drive system near the washing water spray header and has a drawback that stable operation becomes difficult due to rust and the like. Due to these factors, in the conventional filter cloth automatic cleaning device, the filter cloth cleaning time with respect to the dehydration time becomes longer, and equipment maintenance,
There is a disadvantage that the operation is unstable or easily interrupted due to the need for manual intervention such as adjustment.

[0006]

The present invention solves the above-mentioned problems, and will be described in detail below. The cleaning device is configured such that a traveling carriage mounted on a traveling frame mounted on the upper side of the filter press body and a traveling carriage having a nozzle header are driven by a motor through a chain, a sprocket, and a speed reducer. The traversal of the cleaning nozzle header relative to the filter cloth surface and the swinging of the nozzle header provide for more accurate operation speed control using an air cylinder or an air oil unit that converts air pressure to hydraulic pressure.

[0007] With this configuration, the operation of the nozzle header can be set to any stable speed, and a fixed amount of washing water can be sprayed on the entire filter cloth at the time of washing, so that the attached matter can be efficiently washed. Become. Although the main body of the cleaning device is installed above the filter press, it does not have a mechanism to raise and lower the nozzle header linearly from the upper part to the lower part of the filter plate, so the installation height is significantly lower than the structure of the conventional technology (1). And compact equipment. Conventional technology (2)
A structure is used in which the dewatered cake, washing water, etc. attached to the filter cloth during washing do not drop and adhere. By these means, the filter cloth automatic cleaning apparatus of the present invention has a space-saving structure as compared with the prior art and can obtain a good and stable cleaning function.

That is, the gist of the present invention is as follows: (1) A pneumatic pressure is applied to a traveling carriage mounted on the upper side of a filter press body for filtering and separating solid and liquid in a slurry using a filter cloth. An automatic washing of filter cloth of a filter press, comprising a trolley driven by a used cylinder, and a washing water nozzle header driven by a swing mechanism using air pressure on the trolley. apparatus. (2) An automatic filter cloth cleaning apparatus for a filter press, wherein in (1), a pneumatic-hydraulic conversion actuator is used for the traversing and swinging mechanism.

The operation according to the present invention will be described below. First, a traveling vehicle equipped with a traversing vehicle equipped with a nozzle header moves to the center between the filter plates and stops. Next, after the nozzle header turns down by 90 degrees and stops, high-pressure washing water is sprayed from a plurality of nozzles mounted on the nozzle header. Thereafter, the traversing carriage moves the filter cloth surface from the right (left) side to the left (right) side while traversing with the nozzle lowered, and cleans the entire surface of the opposing filter cloths while moving from the right (left) side to the left (right) side. After the traversal is completed, the nozzle header turns upward by 90 degrees to the opposite side of the initial position, stops moving upward, and moves to the next filtration chamber together with the traveling carriage.

[0010] By repeating this series of operations "stop of traveling vehicle → rotation down of nozzle header 90 ° → traverse of traversing truck → rotational rise of nozzle header 90 ° → traveling of traveling truck", an efficient cleaning operation with a minimum waiting time for each operation. Becomes possible. Of these traveling, traversing, and oscillating mechanisms, the traversing and oscillating mechanisms can be controlled at any speed by air pressure alone or in combination with an air-oil unit that converts air pressure to hydraulic pressure. In addition, an arbitrary cleaning operation speed can be set, and a reliable cleaning effect that matches the stain condition of the filter cloth can be obtained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall external view of a filter cloth automatic cleaning device of the present invention. As shown in FIG. 1, the automatic filter cloth cleaning device includes a traveling frame 1, a traveling vehicle 2, a traversing vehicle 3, and a nozzle header 4. FIG. 2 is an explanatory view of a mechanism of a traveling cart of the automatic filter cloth cleaning apparatus. As shown in FIG. 2, the traveling vehicle 2 is connected by a drive chain 5, which is driven by a motor 7 with a speed reducer by two pairs of sprockets 6 and travels guided by rails on the traveling frame 1. The motor with reduction gear 7 can have a variable speed structure, and the traveling speed can be set arbitrarily.

A traversing rail 8 of the traversing carriage 3 is fixed on the traveling trolley 2 and is configured to move via a guide roller 9 attached to the traversing carriage 3. A nozzle header 4 is attached to the traversing carriage 3, and a washing nozzle 10 is attached to inject high-pressure water onto the surface of the filter cloth. This configuration is shown in FIG. That is, FIG. 3 is a plan view of the automatic filter cloth cleaning apparatus viewed from the surface of the filter plate.

FIG. 4 is a view for explaining the operation of the cleaning mechanism of the automatic filter cloth cleaning apparatus. As shown in FIG. 4, the traversing carriage 3 is a so-called rodless cylinder 1 of a fluid driven type in which the traversing rail 8 on the traveling carriage 2 is air pressure alone or air pressure is converted to hydraulic pressure.
2 to reciprocate in the transverse direction. The nozzle header 4 can perform 90-degree and 180-degree forward / reverse swiveling operations by the air pressure alone or the fluid-driven rotary actuator 13 that converts the air pressure into a hydraulic pressure attached to the traversing carriage 3. At the time of washing the filter cloth, the nozzle header 4 stops after turning 90 degrees from the horizontal direction and stops and moves together with the traversing carriage 3, for example, from the right side to the left side of the filter cloth surface, using the high-pressure washing pump and through the nozzle header 4. Inject high-pressure water and wash the filter cloth.

When high-precision speed control is required during the traversing operation of the traversing carriage 3 and the swiveling operation of the nozzle header 4, an air oil converter is used to convert the air pressure supplied from the air compressor into a hydraulic pressure, and a flow rate of air. A more accurate operation can be performed by controlling the flow rate of the hydraulic pressure instead of the control. For this reason, it is possible to arbitrarily set the cleaning rate according to the clogging state of the filter cloth, and it is possible to perform efficient filter cloth cleaning.

FIG. 5 is a side view of the automatic filter cloth cleaning apparatus. As shown in FIG. 5, the nozzle header 4 swings down between the filter plates 11 (filter chamber) and the trolley 3 traverses to wash the entire surface of the filter cloth with high-pressure washing water. . The cleaning water is jetted from the cleaning nozzles 10 belonging to the nozzle header 4, and the nozzles are arranged such that the jets are superimposed on each other by the cleaning nozzles 10. Therefore, the washing water can be sprayed on the entire surface of the filter cloth, and the filter cloth cleaning property is improved.

[0016]

The filter cloth automatic cleaning apparatus of the present invention is provided with the above-described running, traversing, and swinging mechanism, and can uniformly and efficiently clean the entire filter cloth, and can provide the filter cloth. This has the effect of shortening the cleaning time. In addition, the use of pneumatic pressure provides a simple configuration that does not require an electrical control circuit, and the provision of a cushion structure at the end of the operation stroke has the effect of avoiding shocks at the time of starting and stopping.

[Brief description of the drawings]

FIG. 1 is an overall external view of a filter cloth automatic cleaning device,

FIG. 2 is an explanatory view of a mechanism of a traveling cart of the automatic filter cloth cleaning apparatus,

FIG. 3 is a side view of an automatic filter cloth cleaning apparatus,

FIG. 4 is a plan view of the automatic filter cloth cleaning device as viewed from the surface of the filter plate,

FIG. 5 is a plan view of the automatic filter cloth cleaning device as viewed from the side of the filter plate,

FIG. 6 is a front view and a side view showing a conventional filter cloth automatic cleaning device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Running frame 2 Running trolley 3 Traversing trolley 4 Nozzle header 5 Drive chain 6 Sprocket 7 Motor with reduction gear 8 Traversing rail 9 Guide roller 10 Washing nozzle 11 Filter plate 12 Traversing fluid pressure cylinder (rodless cylinder) 13 Fluid for rocking Pressure actuator (rotary actuator) 14 Filter cloth

 ────────────────────────────────────────────────── ─── Continued from the front page (72) Inventor Daisaku Jobe 46-59 Ohara Nakahara, Tobata-ku, Kitakyushu-shi, Fukuoka New Nippon Steel Corporation Machinery & Plant Division

Claims (2)

[Claims] 1. A traversing truck driven by a pneumatic cylinder is disposed on a traveling truck mounted on the upper side of a filter press body for filtering and separating solid and liquid in a slurry using a filter cloth. An automatic filter cloth cleaning apparatus for a filter press, further comprising a cleaning water nozzle header driven by a swing mechanism using pneumatic pressure on the horizontal carriage. 2. An automatic filter cloth cleaning apparatus for a filter press according to claim 1, wherein an air pressure-hydraulic conversion actuator is used for the traversing and swinging mechanism.