JP2007185650A - Filter plate of filter press, filter cloth cleaning device for cleaning filter cloth of filter plate and filter press system containing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter plate, a filter cloth cleaning device and a filter press capable of easily peeling a sticky cake (sludge) from the filter cloth, smoothly discharging the sticky cake and incidentally removing a clogging of the filter cloth for the next process. <P>SOLUTION: At the time of opening chains of a filter plate, a clogging of a filter cloth is removed by jetting a compressed air at the level of 10 kg/cm<SP>2</SP>through a nozzle to the whole filter cloth and giving a strong crossing shaft vibration to peel off the clogging so that a dehydrated cake in a filtering chamber formed by a lot of filter plates is able to drop smoothly by gravity. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a filter cloth for preventing the peeling of the filter cake surrounded by the filter cloth and the clogging phenomenon of the filter cloth in the next step when removing the filter plate of the filter press which is a squeezing over-dehydrator. It relates to cleaning technology.

  Filter presses that remove solids by squeezing solids after solid-liquid separation using a filter cloth from a suspension are used in all industrial fields such as food / chemical / civil engineering / construction / environment. Eventually, as the sludge generated in the wastewater treatment process could not be dumped and landfilled, solid-liquid separation and dewatering had a direct impact on the operating costs of the wastewater treatment plant.

  On the other hand, the viscosity of the suspension during the dehydration process not only increases the filtration specific resistance and lengthens the time required for dehydration, but also requires a higher pressing pressure.

  In addition, when removing the filter plate after dewatering, the sludge cake formed between the filter cloths adjacent to each other cannot be dropped by gravity due to adhesion due to viscosity, and it can be scraped manually or by an automated instrument. However, not only is it not sufficiently removed, but rather the pressure acting between the scraper and the filter cloth clogs the filter cloth, making filtration in the next step very difficult.

  In order to solve such problems, pressure water or vibration technology is applied. However, in the case of microbial digestion sludge, the viscosity is at the level of 3,000 cp, so that the effect is not so great. It is.

  The present invention has been researched and developed in order to solve the problems of the prior art as described above, and its main purpose is to easily peel the sticky cake (sludge) from the filter cloth to facilitate the discharge. And concomitantly removing the clogging of the filter cloth for the next step.

  In addition, the present invention applies a momentary impact with compressed air to the filter cloth to which the sludge is stuck, and at the same time gives a strong cross-axis vibration so that the compressed air moves from the rear face of the filter cloth to the front face. In addition to solving the problem of clogging of the filter cloth, it is possible to solve problems such as damage and unevenness of the filter cloth due to the use of conventional pressure water. .

In order to solve the above technical problem and achieve the object, the present invention allows the dewatered cake inside the filtration chamber formed by a number of filter plates to fall gently by gravity when the filter plates are removed. as, in particular in the case of highly viscous sludge, dewatered cake is not peeled off at all, or partially because levels to be peeled, a strong transverse vibration to the whole filter cloth by ejecting 10 kg / cm ² about the compressed air nozzle It is related to a filter cloth cleaning device for a filter press that removes the clogging phenomenon of the filter cloth by removing the clogging.

  In order to achieve such an object, the present inventor 1) moved one or several filter plates without sorting upper hooks or side hooks in the filter plate moving technique. When the filter cloth cleaning device is installed, the filter plate is automatically stopped by the position and waits for a specified time. In other words, we developed a technology for controlling moving space and time.

  In addition, the present inventor also uses 2) gravity-type automatic opening / closing using eccentricity and the related operation tool (hinge) in combination with a non-permanent operating environment such as dust or water without using power. An automatic opening / closing device for filter cloth has been developed.

  In addition, the present inventor, in a normal filter press filter plate including a filter plate main body and a filter cloth surrounding the filter plate main body, between the end of the contact surface between the filter plate main body and the filter cloth. A contact separation means that can be opened is provided, and compressed air can be injected and injected into a space (gap) between the filter plate main body and the filter cloth formed by the contact separation means when the filter plate is released. A filter plate for filter press was developed.

  Here, the contact separation means is, for example, as described in claim 2, A) Upper end portions on both sides of the filter plate body having a normal structure in which a suspension supply hole is provided in the center of the surface or on one side. Connecting pieces each having a stopper fixed to each other, B) eyebolts formed at the upper ends of a filter cloth having a normal structure, C) a hinge connecting rod for connecting the eyebolts in the longitudinal direction, and D) the connecting parts One end is fixed to each piece and the hinge connecting rod, and a slip screw is used to fix the connecting piece. When the filter plate is removed, the upper end inlet (filter cloth opening / closing port) of the filter cloth is automatically adjusted by the eccentric weight. And an automatic opening / closing hinge having an eccentric shape that is opened at the same time.

  According to the filter cloth cleaning device for filter press according to the present invention, microorganisms can be used in a filter press capable of minimizing moisture content in a sludge dehydrator at the time when direct dumping of various sludges and ocean dumping are prohibited. It is possible to simultaneously solve the cake peeling failure and the clogging phenomenon of the filter cloth that occur during the dewatering of the treated sludge.

  The present invention also eliminates the need for using separate pressure water (washing water) even in the case where the adhesiveness is high due to solid-liquid separation and dehydration, which are essential in production processes such as food and chemical industries. It can reduce the processing load and is hygienic.

  Hereinafter, a filter plate and filter cloth cleaning device according to a preferred embodiment of the present invention and a novel filter press system including the same will be described in detail with reference to the drawings.

  The attached FIG. 1 is a schematic view showing a schematic configuration of a filter press system provided with a filter cloth cleaning device according to an embodiment of the present invention, and FIG. 2 is surrounded by the filter cloth in FIG. FIG. 1 is a perspective view showing one filter plate extracted, FIG. 1 is a configuration diagram of parts related to automatic opening and closing of FIG. 2, and FIG. 4 is a diagram of a filter cloth cleaning device extracted from FIG. It is a front view concerning an example.

  As shown in the drawing, the filter cloth cleaning device (1) for a filter press according to an embodiment of the present invention has a frame (22) installed so that it can be attached to a normal filter press (9). Yes.

  Further, the compressed air distribution manifold (22) is applied to the frame (22) so that the compressed air acts on the entire surface of the filter cloth (12) from the compressed air hose (3) connected to the compressed air inlet (2). 4) is connected to the compressed air hose (3).

  In addition, at the end of the manifold (4), a total of four nozzles (5), two in each direction, are installed. However, in actual application, the number of nozzles used is less or less than that. is there.

  Further, as a means for moving the filter plate in which the filter plate main body (11) having a normal structure is surrounded by the filter cloth (12), side hooks for moving the filter plate by pulling on both side surfaces and the upper surface are drawn. Although an overhead hook that can be moved can be used in all cases, such a thing is already attached to an actually produced product in a state where the present inventor has already received a utility model registration. (Korean registered utility model No. 34068, many rights holders: Kim base)

  The filter plate of the present experimental example moved in units of one or many by such moving means comes into contact with the position (7), and 1 according to the electrical signal from the position (7). One or many filter plates will wait at the optimal point for cleaning with compressed air. In this state, the solenoid valve (6) is opened at an appropriate time interval, so that it is automatically opened by the eccentric weight of the automatic opening / closing hinges (14, 16) attached to the filter plate body having a normal structure. High pressure compressed air is injected into the space between the filter plate body (11) and the filter cloth (12) through the inlet, that is, the filter cloth opening / closing port (8).

  Here, non-contact type sensors / switches such as proximity switches or contact type sensors / switches such as limit switches can be adopted as the above positions, and these sensors / switches can be used for processing of a PC or the like for signal processing. Can lead to treatment.

  Therefore, the filter cloth cleaning device (1) configured as described above can be optimally applied to solid-liquid separation and dehydration of highly viscous microorganism-treated sludge or the product of the polymerization reaction process in the production process. is there.

  In FIG. 2, the filter plate body (11) having a normal structure formed of rubber or polypropylene is wrapped with a filter cloth (12), and a hinge connecting rod (18) can be placed on the upper part of the filter cloth. The eyebolt (10) is provided with a hole in the center or on one side of the surface of the filter cloth so that the suspension can be supplied.

  In addition, the eyebolt (10) can be formed by rounding the upper end of the filter cloth as shown in FIG. 2, but only the both ends of the upper end of the filter cloth are wound by a predetermined length. The metal ring may be fixed to the upper end of the filter cloth.

  FIG. 3 shows a detailed operation principle and a configuration diagram of related parts for automatic opening / closing of the filter cloth opening / closing port (8) of FIG.

  As seen in the drawing, the # 1 automatic opening hinge (14) and # 2 automatic opening hinge (16) are opened to the left and right sides of the filter plate body (12) by the eccentric shape. It is assembled through a hole (15), in particular by means of a slip screw (17) without a certain part of the helix, so that it can be drawn easily outwards. At this time, it is assembled to the connecting pieces (19) installed at the upper ends on both sides of the filter plate body so that the operating range of the automatic opening / closing hinge is limited by the side stopper.

  The filter cloth (12) that wraps around the front and rear surfaces of the filter plate main body (11) is provided with a large number of side bundle strings (20), and the filter cloth opening / closing port (8) is placed in the upper eyebolt (10). The hinge connecting rod (18) for guiding the opening and closing of the door is sandwiched, and the automatic opening and closing hinges (14, 16) are fixed to the side surface of the hinge connecting rod (18) through the connecting rod fixing hole (13). Yes.

  Here, as the above-mentioned filter cloth, if eyebolts are formed at both ends of the upper end, even conventional ones can be used as they are, so in some cases, there is no need for side bundles and there is a difference in the number used. There can also be.

  In the frame (22) of FIG. 4, various devices and parts related to the filter cloth cleaning device using compressed air are assembled, but various specifications such as a frame shape such as square / circular and height / thickness are as follows. It can be adjusted appropriately according to the specifications of the filter press.

It is an illustration figure of the filter press system with which the filter cloth cleaning apparatus concerning one Embodiment of this invention was mounted | worn. FIG. 2 is an assembly state diagram of a filter plate surrounded by an automatic opening / closing filter cloth extracted from FIG. 1. It is a block diagram of the opening-and-closing related part of the automatic opening-and-closing type filter cloth of FIG. It is a front view of the filter cloth cleaning apparatus of FIG.

Explanation of symbols

1 Filter cloth cleaning device 2 Compressed air inlet 3 Compressed air hose 4 Manifold
5 Nozzle 6 Solenoid valve 7 Position 8 Cloth opening / closing port 9 Filter press 10 Eye bolt 11 Filter plate body 12 Cloth 13 Connecting rod fixing hole 14 # 1 Automatic opening / closing hinge 15 Filter plate fixing hole 16 # 2 Automatic opening / closing hinge 17 Slip screw 18 Hinge connecting rod 19 connecting piece 20 side bundled string 22 frame

Claims (5)

  In a normal filter press filter plate including a filter plate main body and a filter cloth surrounding the filter plate main body, a contact surface end of the filter plate main body and the filter cloth is connected to the filter plate main body and the filter cloth. A filter press comprising contact separation means, and when the filter plate is removed, compressed air can be injected into a space between the filter plate main body and the filter cloth formed by the contact separation means. Filter plate. The contact separation means comprises:
A connecting piece having stoppers fixed to the upper ends of both sides of the filter plate body,
Eyebolts formed on the upper ends of the filter cloth,
A hinge connecting rod coupled to the eyebolt in the longitudinal direction;
One end is fixed to each of the connecting piece and the hinge connecting rod, and a slip screw is used to fix the connecting piece. When the filter plate is released, the filter cloth opening at the top of the filter cloth is automatically opened by the eccentric weight. An eccentric opening and closing hinge that can be opened,
The filter plate for a filter press according to claim 1, comprising: In the filter press using the filter plate for a filter press according to claim 1 or 2,
A frame that is fixed to the filter press so that the filter plate is positioned on the side to be removed;
When the filter plate is removed and moved toward the frame, a position installed on the frame so that the stop position of the filter plate can be detected, and
A compressed air hose installed on the frame so that compressed air can be jetted toward the filter plate when the movement of the filter plate is stopped below the frame by detecting the position of the position;
A manifold installed at one end of the compressed air hose;
A nozzle for jetting compressed air installed at the end of the manifold;
A filter cloth cleaning device for a filter press.   The filter cloth cleaning device for a filter press according to claim 3, wherein compressed air is jetted onto the front and rear surfaces of the filter plate. A filter plate that automatically opens the inlet of the upper end of the filter cloth by its own weight when the chain is released for discharging sludge cake;
A filter press in which a large number of the filter plates are installed;
A frame that has been fixed to the filter press so that the filter plate is located on the side where the chain is to be released;
A position installed on the frame to detect the stop position of the filter plate;
A compressed air hose installed on the frame so that the compressed air can be jetted toward the filter plate when movement of the filter plate is stopped below the frame by position detection of the positiono;
A manifold installed at one end of the compressed air hose;
A nozzle installed at the end of the manifold;
Including, filter press system.

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