JP2008307442A - Sludge filtration apparatus capable of obtaining uncontaminated clean liquid and its method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sludge filtration apparatus capable of obtaining an uncontaminated clean liquid, and to provide a method therefor. <P>SOLUTION: In the cyclone type sludge filtration apparatus which discharges a drain liquid intermittently, the sludge filtration apparatus capable of obtaining the uncontaminated clean liquid is characterized by arranging a cyclonic configuration dirty room of which the lower part is conic in the sludge filtration apparatus and installing two of two-way automatic switch valves or a three-way automatic switch valve having bypassing piping for the clean liquid exit piping at the upper part of the sludge filtration apparatus and installing a drain automatic valve for discharging the drain liquid intermittently at the lower part of the sludge filtration apparatus. The method therefor is also provided. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sludge filtration device and a method thereof capable of obtaining a clean liquid without contamination.

  Conventionally, as a method for efficiently separating and filtering impurities from waste liquid containing impurities such as sludge, for example, as disclosed in JP-A-2003-225515 (Patent Document 1), a fluid outlet is provided at the shaft core. And having a fluid inlet at a position displaced from the shaft core, supplying a fluid containing fines from the fluid inlet at a predetermined flow rate to generate a spiral, and moving the fines outward in a centrifugal state. A filter device having a filter unit that discharges a fluid from which fines have been separated from the fluid outlet, decelerates the vortex to settle the separated fines, and a sedimentation unit that sediments the fines that settle at the filter unit. Is provided.

  Further, as disclosed in Japanese Patent Application Laid-Open No. 2001-121038 (Patent Document 2), a swirl accelerating unit that includes a mixed fluid inlet port connected in a tangential direction at an upper portion and reduces the diameter downward at a lower portion. With a fluid outlet in the upper center of the shaft and connected to the lower end of the swirl acceleration part of the cyclone and extending vertically downward, and a swivel stop inside the solid separation chamber formed so as to surround the outer periphery of the perforated tube A centrifuge equipped with a member and receiving solids discharged outward from the pores of the perforated tube by centrifugal force, and a swivel connected to the lower end of the perforated tube to expand downward and descend inside the perforated tube A sedimentation separator having a swirl reduction part that is configured to reverse the flow to an upward flow passing through the axial center, and a precipitation part for receiving solids separated from the mixed fluid below the swirl reduction part; Solid separation equipment with There has been proposed.

  The structure of the cyclone described above is to send the dirty liquid from the circumferential direction of the upper cylinder by the pressure of the pump so that the liquid rotates around the outer circumference of the cylinder with centrifugal force. Moreover, the cylinder is configured such that the diameter of the cylinder decreases toward the lower part, dust having a specific gravity higher than that of the liquid is collected on the outer periphery, and finally falls to the lower part of the outer periphery. On the other hand, the clean liquid with no dust is discharged from the outlet at the top of the center. Moreover, the dust which fell to the lower part settles in the sedimentation tank provided in the lower part. Moreover, this dust is intermittently discharged to the outside from the lower drain valve.

  The cyclone as described above is a very excellent separation method in that dust having a high specific gravity can be efficiently separated, but the cyclone has some disadvantages. That is, the processing accuracy (cleanness) of the cyclone is a structure in which a constant necessary pressure is supplied from the structure, and the inside of the container starts to rise and the original performance is exhibited. The amount of pressure supplied to the cyclone for that purpose is generally considered to be at least about 0.1 to 0.3 MPa when used for the treatment of cutting fluid. On the other hand, when the pump starts (about 5 seconds in terms of time) and when the pump stops, the flow of the liquid is about 5 to 10 seconds, and the liquid does not rise to the pressure at which the cyclone performance is achieved. The timing that flows out occurs.

Further, in a cyclone that intermittently discharges sludge, the internal sludge rises due to back pressure when the drain valve is opened and closed, and flows out from the clean outlet. Naturally, a dirty liquid that does not exhibit the performance of the original cyclone flows out to the clean outlet pipe that flows out at this moment. When this is used as a filter for feeding a cutting fluid to a spindle through pump, it causes various causes such as defects in a drill-cut product, piping clogging, and drill clogging. For this reason, conventionally, a mesh filter or the like is generally provided as a post process of the cyclone treatment in order to compensate for the disadvantages of the cyclone.
JP 2003-225515 A JP 2001-121038 A

  The filter device and the solid separation device of Patent Document 1 and Patent Document 2 described above have been proposed, but these were all sent directly from the clean piping connected to the filter device and the solid separation device to the clean tank side. . Therefore, as described above, when the pump is switched on, when the pump is stopped, and when the drain valve is opened / closed, the internal sludge rises at the back pressure, flows out of the clean outlet, and the clean outlet pipe that flows out instantaneously has the original cyclone. There are problems such as the outflow of dirty liquid that does not exhibit the above performance. However, the reality is that these problems have not been solved at all.

  In order to solve the above-mentioned problems, the inventor has eagerly developed, and as a result, the flow of liquid due to inertia at the start and stop of the pump and the rise of internal sludge at the back pressure when the drain valve is opened and closed, Bypass piping to the clean liquid outlet pipe to prevent the instantaneous liquid generated by the dirty liquid from flowing out from the clean outlet or dirty liquid that does not perform the cyclone performance. A two-way automatic switching valve having two or three-way automatic switching valve (hereinafter referred to as a three-way automatic switching valve), and a sludge filtration device that solves the above problem by controlling the three-way automatic switching valve, and its A method is provided.

The gist of the invention is that
(1) In a cyclone type sludge filtration device that intermittently discharges drain liquid, a cyclone-shaped dirty chamber having a conical lower portion is disposed in the sludge filtration device, and a clean liquid outlet pipe is provided above the sludge filtration device. In addition to providing two or three-way automatic switching valves with bypass piping, a drain automatic valve for intermittently discharging the drain liquid is provided at the bottom of the sludge filter. A sludge filtration device capable of obtaining a clean liquid without contamination.

  (2) In the cyclone-type sludge filtration method for intermittently discharging drain liquid, the dirty liquid is sent to the cyclone-shaped dirty chamber in the sludge filtration device so as to rotate with centrifugal force, and the sludge is placed on the outer periphery of the cyclone-shaped dirty chamber. Is collected and dropped to the lower part of the outer periphery, while clean liquid has two 2-way automatic switching valves with bypass piping or three-way automatic switching valves, so that the pump is started and stopped, and the drain valve is opened and closed. A sludge filtration method capable of obtaining a clean liquid without contamination, wherein the two-way automatic switching valve or the three-way automatic switching valve is switched to the bypass piping side when the change occurs, and then the operation is controlled to the clean piping side It is in.

  As described above, the three-way automatic switching valve having the bypass pipe is provided in the clean liquid outlet pipe, and the control of the three-way automatic switching valve having the bypass pipe allows the liquid to be generated due to inertia at the start and stop of the pump. Instantaneous fluid clean-up of contaminated liquid such as flow of internal sludge by back pressure when opening and closing the drain valve, outflow from clean liquid outlet, outflow of dirty liquid not performing cyclone performance The present invention provides a sludge filtration device that can prevent outflow to piping.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall schematic view of a sludge settling chamber for intermittently discharging a drain liquid according to the present invention. As shown in FIG. 1, a cyclone-shaped dirty chamber 2 having a conical lower portion is provided in a sludge settling chamber 1 formed of a sealed cylindrical container, and dirty dirty liquid such as coolant discharged from a machine tool or the like is removed from the dirty tank. Dirty liquid is introduced from the pump through the dirty liquid inlet pipe 3 from the circumferential tangential direction of the cyclone-shaped dirty chamber 2 while generating a cyclone flow.

  The inflowing dirty liquid moves to the lower part of the cyclone chamber 2 while generating a cyclone flow in the cyclone-shaped dirty chamber 2, and the sludge having a heavy specific gravity is removed in the cyclone-shaped dirty chamber 2 to the lower part of the cyclone-shaped dirty chamber 2. Precipitate. On the other hand, the filtered clean liquid flows out from the clean liquid outlet pipe 4 provided in the upper part of the cyclone-shaped dirty chamber 2 through a three-way automatic switching valve 5 having a bypass pipe, and is sent to a clean tank (not shown). It is done. In this case, the three-way automatic switching valve 5 provided in the clean liquid outlet pipe is provided with a bypass pipe 6 and is sent from the bypass pipe 6 to a dirty tank (not shown) by switching the three-way automatic switching valve 5. On the other hand, the sludge settled in the lower part of the cyclone-shaped dirty chamber 2 is discharged from the drain automatic valve 7 and sent from the sludge liquid outlet 8 to the sludge treatment device.

  As described above, the filtered clean liquid flows out through the three-way automatic switching valve 5 having the bypass pipe provided in the clean liquid outlet pipe 4 provided in the upper part of the cyclone-shaped dirty chamber 2, and enters the clean tank. It is what is sent. In this case, by attaching a three-way automatic switching valve 5 having a bypass pipe, the liquid at the moment when dirty liquid is generated is prevented from flowing out to the clean liquid outlet pipe 4.

  That is, by providing the three-way automatic switching valve 5 having a bypass pipe in the clean liquid outlet pipe 4, for example, when the pump is started, the three-way automatic switching valve 5 in the clean liquid outlet pipe 4 is first controlled by electrical control. After opening in the direction of the bypass pipe 6 and the cyclone-shaped dirty chamber 2 inlet pressure is increased to the required pressure of 0.1 to 0.3 MPa, the clean liquid outlet pipe side of the three-way automatic switching valve 5 is switched to open. When the pump is stopped, the three-way automatic switching valve 5 in the clean liquid outlet pipe 4 is switched from the clean side to the bypass pipe 6 side by electrical control, or the pump is stopped at the same time.

  Furthermore, when the drain valve is opened, first, the three-way automatic switching valve 5 in the clean liquid outlet pipe 4 is switched from the clean side to the bypass pipe 6 side by electrical control, and then the drain valve 8 is opened. When the drain valve is closed, the three-way automatic switching valve 5 in the clean liquid outlet pipe 4 is switched to the clean side after the cyclone chamber pressure is stabilized by electrical control 3 to 5 seconds after the drain valve is closed. In this way, the three-way automatic switching valve 5 provided in the clean liquid outlet pipe 4 can be controlled so that the clean liquid can be stably sent to the clean pipe at all times, and the original performance as a cyclone can be exhibited 100%. Is possible.

  FIG. 2 is a detailed view of the inlet to the cyclone-shaped dirty chamber according to the present invention. As shown in this figure, the dirty liquid discharged from the machine tool or the like into the cyclone-shaped dirty chamber 2 by providing the dirty liquid inlet pipe 3 in the circumferential tangential direction of the sludge settling chamber 1 constituted by a sealed cylindrical container. When a dirty liquid such as a sludge is introduced while generating a cyclone flow, sludge having a heavy specific gravity in the dirty liquid is separated while being brought close to the inner wall of the cyclone-shaped dirty chamber 2 and the cyclone-shaped dirty chamber 2 Precipitate at the bottom. The filtered clean liquid flows into the clean tank through the three-way automatic switching valve 5 having a bypass pipe provided in the clean liquid outlet pipe 4 provided in the upper part of the cyclone-shaped dirty chamber 2, and from the clean tank. It is configured to be sent as a clean liquid.

  As described above, by causing the dirty liquid to flow into the cyclone-shaped dirty chamber while generating a cyclone flow, the sludge having a specific gravity heavier than the liquid is caused to flow to the outer periphery of the cyclone-shaped dirty chamber by the centrifugal force of the cyclone flow. It is deposited at the bottom of the cyclone-shaped dirty chamber by the inclination of the chamber. With this method, even a liquid having a high sludge concentration can reduce the load on filtration.

  On the other hand, in a cyclone that discharges sludge intermittently, the internal sludge soars at the back pressure when the drain valve opens and closes, flows out from the clean outlet, and demonstrates the performance of the original cyclone in the clean outlet pipe that flows out instantaneously. In order to prevent unclean liquid, a three-way automatic switching valve with a bypass pipe is provided in the clean liquid outlet pipe, and this three-way automatic switching valve is switched over when the pump is switched on, when the pump is stopped, and when the drain valve opens and closes. Providing a device that can obtain a clean clean where the dirty liquid does not always flow to the clean pipe by controlling the three-way automatic switching valve so that the dirty liquid does not flow to the clean liquid outlet pipe. It is possible to do that.

1 is an overall schematic view of a sludge settling chamber for intermittently discharging a drain liquid according to the present invention. It is detail drawing of the inflow port to the cyclone-shaped dirty room based on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sludge sedimentation chamber 2 Cyclone shape dirty chamber 3 Dirty liquid inlet piping 4 Clean liquid outlet piping 5 3-way automatic switching valve 6 Bypass piping 7 Drain automatic valve 8 Sludge liquid outlet


Patent Applicant F-Cist Co., Ltd.
Attorney Atsushi Shiina

Claims (2)

In the cyclone type sludge filtration device that intermittently discharges the drain liquid, a cyclone-shaped dirty chamber having a conical lower portion is disposed in the sludge filtration device, and a bypass pipe is provided in the upper portion of the sludge filtration device as a clean liquid outlet pipe. The two-way automatic switching valve having two or three-way automatic switching valve is provided, and a drain automatic valve for intermittently discharging the drain liquid is provided at the lower part of the sludge filtration device. Sludge filtration device that can acquire no clean liquid. In the cyclone type sludge filtration method for intermittently discharging the drain liquid, the dirty liquid is sent to the cyclone-shaped dirty chamber in the sludge filtration device so as to rotate with centrifugal force, and the sludge is collected on the outer periphery of the cyclone-shaped dirty chamber. By dropping two 2-way automatic switching valves with bypass piping or providing a three-way automatic switching valve, the clean liquid is dropped at the lower part of the outer periphery, so that when the pump starts and stops, and when the drain valve opens and closes A sludge filtration method capable of obtaining a clean liquid free of dirt, wherein the two-way automatic switching valve or the three-way automatic switching valve is switched to the bypass piping side, and then the operation control is performed on the clean piping side.

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