JPH0376168B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a superconcentrator that performs superconcentration by applying electricity to a stock solution flowing through a channel formed in a frame.

Prior art Two types of concentrating plates each having a flow path for the concentrate on the front and back sides are arranged in a stacked manner so that the flow paths face each other. A concentrator (Special Publication No. 1989-1993) in which the liquid that has passed through the material is discharged from a liquid hole provided in the flow path.
7726) is known. In addition, a cake layer formed on the surface of the material is used as an electrode, and the other electrode corresponding to the electrode is provided in the pass chamber, and current is passed between the two electrodes (Japanese Patent Publication No. 37-581).
is known.

Problems to be Solved by the Invention However, in the concentration machine that polymerizes the concentration plate,
There was a problem in that it took time and effort to adjust the flow rate of the supplied stock solution, making it difficult to operate efficiently. In addition, in the case where current is passed between both electrodes, the cake is deposited thickly on the surface of the Moppara layer to promote the oxidation, and it is not intended to obtain a concentrated liquid at the same time.

In order to solve the above-mentioned problems, the present invention provides a superconcentrator that can pass an electric current through the stock solution flowing through the stock solution passage formed in the stock solution passage frame, and can efficiently perform superconcentration without clogging the material. This is what we provide.

Means for Solving the Problems That is, the present invention provides a solution passage frame having a concentrate passage bent on the frame surface, and a membrane plate disposed opposite to the passage frame. This is a superconcentrator consisting of one water-permeable electrode plate interposed therein and the other electrode plate disposed on the opposite side of the stock solution passage frame.

Function The stock solution that is supplied from the stock solution passage hole of the stock solution passage frame to one end of the stock solution passage is separated in the passage through a filter membrane placed on one side of the stock solution passage frame, and is gradually concentrated. . The concentrated liquid having a high solid content is discharged to the outside of the machine through a concentrated liquid passage hole communicating with the other end of the raw liquid passage. On the other hand, the liquid separated through the membrane passes over the entire surface of one liquid-permeable electrode plate, flows through the liquid passage of the membrane, and is discharged outside the machine from the liquid passage hole of the membrane.

At the initial stage of the concentration or after a certain period of time, electricity is applied from outside the machine to the terminals of one of the liquid-permeable electrode plates and the terminals of the other electrode plate placed on the other side of the concentrate passage frame. . The stock solution flowing through the stock solution passage at a predetermined speed increases the amount of liquid passing through the membrane and pushes away the solid particles that tend to accumulate on the membrane surface, gradually becoming concentrated and reaching the concentrated liquid passage hole. It is ejected from the aircraft. In addition, the liquid that has passed through the membrane rapidly passes through the entire surface of one liquid-permeable electrode plate, flows through the liquid flow path of the membrane, and
The liquid is discharged from the machine through the liquid passage hole in the pass plate.

Embodiments The present invention will be explained with reference to figures of implementation. FIG. 1 is a side view of a superconcentrator embodying the present invention, and FIG. 2 is a front view of a fixing plate. In the figure, 1 is a pedestal on the fixed plate 3 side, and 2 is a pedestal on the tightening device 4 side. A movable plate 6, which can move forward and backward on a side plate 5 spanning between both pillars, is connected to the tip of the piston rod of the tightening device 4. A stock solution passage frame 7 and a pass plate 8 are arranged so as to be movable on the side 5 between the fixed plate 3 and the movable plate 6. Between this stock solution passage frame 7 and the passing plate 8,
As shown in FIG. 3, the permeable membrane 9 and one of the liquid-permeable electrode plates 10 are positioned such that the permeable membrane 9 is on the side of the stock solution passage frame 7 and one of the liquid-permeable electrode plates 10 is on the side of the permeable plate. I have intervened. Further, the other electrode plate 11 is arranged on the side opposite to the side where the stock solution passage frame faces the pass plate. As shown in FIG. 4, the stock solution passage frame 7 is provided with a stock solution passage hole 12 at one end and a concentrated solution passage hole 13 at the other end passing through the frame surface. The stock solution passage 14 is bent on the frame surface. One end of this stock solution passage 14 is connected to a communication hole 15.
The other end passes through a communication hole 16 and communicates with the concentrated liquid communication hole 13 .
FIG. 5 shows the stock solution passage hole 12, the communication hole 15, and the stock solution passage 14 section of the stock solution passage frame 7 in a longitudinal section.
The figure shows a horizontal cross section of 14 portions of the stock solution passage. The above-mentioned stock solution passage 14 may also be a passage provided recessed on both sides of the frame. In addition, the above-mentioned overboard 8
As shown in FIG. 7, there is a stock solution passage hole 12 at one end,
Further, a concentrated liquid passage hole 13 is provided at the other end to pass through, and a concentrated liquid passage 14 of the concentrated liquid passage frame 7 is provided on the plate surface.
The liquid flow channel groove 17, which is carved opposite to the groove 17, is bent. A liquid collection path 19 having openings 18 in the groove surface at several places in the middle where this liquid flow path groove 17 bends is passed through the thickness of the overplate 8, and one end thereof penetrates the other end of the overplate 8. It opens into the liquid passage hole 20. 8 is a longitudinal sectional view of the liquid flow path groove 17, liquid collection path 19, and opening 18 in FIG. 7, and FIG. 9 is a cross sectional view of the same liquid flow path groove 17. Further, the above-mentioned overplate may be provided with a large number of through holes passing through the front and back sides thereof, so that the liquid can flow between the front and back sides. Further, the above-mentioned membrane 9 is made by cutting a cloth normally used in a filtering/concentrating machine into approximately the same size as the undiluted solution passage frame and hanging it on the frame surface. Alternatively, the membrane may be cut into a size that covers both sides of the membrane by attaching electrode plates 10 and 11 to both sides of the membrane 8 and covering both sides of the membrane together with the electrode plates 10 and 11 (Fig. 10). good. In addition to this cloth, ion exchange membranes, nonwoven fabrics, fine wire mesh coated with resin, etc. are used. Also,
Among the electrode plates 10 and 11 described above, one liquid-permeable electrode plate 10 is shown in FIG. The electrode plate 10 has a porous liquid-permeable surface 2 on the inside surrounded by the outer peripheral part 21.
2, and a current-carrying terminal 23 is attached to the center of the upper side of the outer peripheral portion 21. Further, one end of the outer peripheral portion 21 is penetrated by the stock solution passage hole 12, the concentrated liquid passage hole 13, and the liquid passage hole 20. FIG. 12 shows a cross section of the current-carrying terminal 23 portion. Further, a part of the liquid passing surface 22 (marked by A) is shown enlarged in FIG. 24 is a liquid passage hole. Further, the other electrode plate 11 is shown in FIG. A terminal 25 for power supply is attached to the center of the upper side of the outer periphery of the electrode plate 11, and an undiluted solution passage hole 12, a concentrated liquid passage hole 13, and a liquid passage hole 20 are passed through one end of the outer periphery. FIG. 15 shows a cross section of the energizing terminal 25 portion. Note that a gasket 26 is interposed between the undiluted solution passage frame 7 and the electrode plate 11 if necessary due to the material of the undiluted solution passage frame. FIG. 16 is a front view of this gasket, which has a space 27 inside surrounded by its outer periphery that runs through and faces the stock solution passage of the stock solution passage frame. FIG. 17 shows a cross section of this cavity 27.

In the above explanation, the stock solution hole 12, the concentrated solution passage hole 13, and the liquid passage hole 20 penetrate through the stock solution passage frame 7, the pass plate 8, the electrode plates 10, 11, the pass membrane 9, and the gasket 26, and are connected to the fixing plate, respectively. 3 side flange 28,
Although the undiluted solution passage hole 12 and the concentrated solution passage hole 13 are provided so as to form a communication pipe extending to the undiluted solution passage frame 7, the undiluted solution passage hole 12 and the concentrated liquid passage hole 13 do not need to be provided in all of them, and may be provided only in the undiluted solution passage frame 7 and outside thereof. . In addition, the liquid passage holes 20 do not need to be provided in all of them, and may be provided only in the overplate 8 and outside thereof. Furthermore, the shapes of the stock solution passage 14 of the stock solution passage frame 7 and the liquid channel grooves of the pass plate 8 are not limited to those shown in the drawings.

Next, the operation of this embodiment will be explained. The tightening device 4 and movable plate 6 are driven to supply the stock solution from the stock solution passage hole 12 of the stock solution passage frame 7 at the position shown by the solid line in FIG. The stock solution passes through the communication hole 15, flows through the stock solution passage 14, is concentrated, passes through the communication hole 16 at the other end, and is discharged from the concentrated liquid passage hole 13 to the outside of the machine. In addition, the liquid that has passed through the membrane 9 passes through the liquid passage surface 22 of the liquid-permeable electrode plate 10 and is transferred from the liquid passage groove 17 of the membrane 8 to the opening 1 on the surface of the passage groove 17.
8 and is collected in the liquid collection path 19 and discharged from the liquid passage hole 20 to the outside of the machine. From the middle of the above-mentioned superconcentration step, the superconcentration step by energization begins. 3
Reference numerals 1 and 32 denote electric wires having one end connected to terminals 23 and 25 of the electrode plate, respectively, and the other end connected to poles 34 and 35 of a DC power supply 33 installed outside the machine via a bus bar 36, respectively. Therefore,
The liquid-permeable electrode plate 10 serves as a cathode plate, and the other electrode plate 11 serves as an anode plate. Electrophoretic action is added between the two poles, and overconcentration continues,
Solid particles attempting to adhere to the membrane 9 side are swept away by the flow of the stock solution due to electrokinetic phenomena and are effectively concentrated without causing clogging.

The above-mentioned energization between the two electrodes switches the polarity between Yin and Yang depending on the electrical properties of the stock solution. Alternatively, a flow rate adjustment device may be connected to the concentration side and the liquid side to adjust each flow rate. In addition, the above energization timing is
It may be carried out from the initial stage of overconcentration. After energization, scale in the sludge adheres to the cathode side with the passage of time, increasing electrical resistance. Therefore, in order to remove this scale, the polarity of the cathode and anode may be changed as appropriate. This scale removal time (polarity conversion time) may be several minutes. Next, after overconcentration for a predetermined period of time, the tightening device 4 and movable plate 6 are moved to the dotted line position, opened, cleaned as necessary, and inspected for the next overconcentration. Wait for concentration.

In the above, the stock solution to be overconcentrated includes general industrial wastewater sludge, fruit juice production stock solution, raw material for alcoholic beverages, and the like. Further, as liquid-liquid separation, for example, separation of oil in water is possible. Furthermore, the properties of the sludge in the concentrated liquid concentrated by the superconcentrator of the present invention are changed by the oxidation-reduction effect caused by electrolysis.
Over-dehydration becomes easy, and sludge can be over-dehydrated without adding chemicals such as super-aids.

Effects of the Invention The advantages of the present invention are as follows.
That is, with the above configuration, a concentrated liquid having a predetermined concentration can be easily obtained. Further, overconcentration can be carried out for a long period of time without clogging the membrane. In addition, a simple washing with water is sufficient for cleaning the membrane and the stock solution passage frame. Furthermore, the electrodes are free from adhesion of solid matter and are easy to clean. In addition, since assembly and disassembly do not require any effort, it is easy to replace parts such as the stock solution passage frame of a predetermined thickness and the electrode plate.

[Brief explanation of drawings]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
The figure is a front view of the fixed plate seen from the left side of Figure 1, Figure 3 is a horizontal sectional view of Figure 1, Figure 4 is the front of the concentrate passage frame, and Figure 5 is a sectional view taken along the Y1-Y1 line in Figure 4. , Figure 6 is a sectional view taken along the line X1-X1 in Figure 4, Figure 7 is a front view of the overplate, Figure 8 is a sectional view taken along the Y2-Y2 line in Figure 7, and Figure 9 is a sectional view taken along the line X2-X2 in Figure 7. 10 is a side view showing a part of the concentrate passage frame shown in FIG.
Figure 1 is a front view of the liquid-permeable electrode plate, Figure 12 is the 11th
13 is a partial front view of FIG. 11, FIG. 14 is a front view of the other electrode plate, FIG. 15 is a center sectional view of FIG. 14, and FIG. 16 is a front view of the gasket. 17 is a sectional view taken along the line X3-X3 in FIG. 16. 7... Raw solution passage frame, 8... Passing plate, 9... Passing membrane, 1
0... Liquid-permeable electrode plate, 11... Electrode plate, 12... Stock solution hole, 13... Concentrated solution hole, 14... Stock solution passage, 15,
16...Communication hole, 17...Liquid channel groove, 18...Opening,
19...Liquid collection path, 20...Liquid passage hole, 21...Outer periphery, 22...Liquid passage surface, 23, 25...Terminal, 24...Through hole, 26...Gasket, 27...Vacancy, 28, 2
9, 30...Flange, 31, 32...Electric wire, 33...
DC power supply, 34...poles, 35...poles.

Claims (1)

[Claims] 1 Passing through a stock solution passage hole at one end of the frame and a concentrated liquid passage hole at the other end, and bending the stock solution passage on the frame surface,
A filtration membrane and one of the filtration membranes are disposed between a filtrate passage frame in which one end of the passage communicates with the undiluted solution passage hole and the other end communicates with the concentrate passage hole, and a filtration plate disposed opposite to the undiluted solution passage frame. A liquid-permeable electrode plate is interposed such that the permeable membrane is positioned on the side of the undiluted solution passageway frame, and one liquid-permeable electrode plate is positioned on the side of the undiluted solution passageway, and the undiluted solution passageway frame faces the undiluted solution passageway frame. The other electrode plate is arranged on the opposite side, and a liquid collection path communicating with the liquid passage hole is opened on the side of the overplate opposite to the one liquid-permeable electrode plate, and each of the electrodes is arranged on the opposite side. A superconcentrator characterized in that electrical terminals are connected to each plate, and the machine frame can be tightened and separated from both ends.