JP2005319463A - Apparatus for precisely recovering water resource - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for precisely recovering a water resource with which metal powder in liquid waste can effectively be separated. <P>SOLUTION: This apparatus is provided with a liquid waste collecting tank 10, a pump 20, a filtration cylinder 30 and a filtrate recovering tank. A suction end of the pump 20 is connected to the liquid waste collecting tank 10 through a suction pipe 21 and a discharge end of the pump is connected to a transportation pipe 22. The filtration cylinder 30 has a cylindrical part, a cover, a perforated tank to be put in the cylindrical part and a filter composed of a fabricated bag part and a positioning frame to be joined to the upper part of the bag part. The positioning frame is fit onto the supporting surface of the cylindrical part and the cover is fit to the upper part of the cylindrical part. An extended part having a curved spout at the inner edge is arranged at one edge of the cover. The cylindrical part has a liquid injecting pipe to be connected to the curved spout in a position opposed to the curved spout. The lower end of the liquid injecting pipe is connected to the transportation pipe 22 of the pump 20. The filtrate recovering tank is installed under a recovery pipe arranged on the bottom surface of the filtration cylinder 30. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a water resource precision recovery apparatus, and more particularly to an apparatus that can recover copper-containing powder in polishing waste liquid, recover filtered water, and recycle it in the manufacturing process.

  The issue of industrial wastewater treatment attracts the interest of traders and environmental protection agencies. This is because if the waste liquid contains toxic substances and is not treated properly, it can seriously affect the ecology, cause double pollution, and threaten the survival of mankind. And since industrial waste liquid contains recyclable substances, such as copper, gold | metal | money, or nickel, if it discharges arbitrarily, it will become an economic loss.

  The manufacture of printed circuit boards (PCBs) must undergo a manufacturing process such as corrosion or polishing, and the waste liquid contains metal components such as high-value copper in the manufacturing process. I am thinking of recycling.

  The most commonly used method is to inject waste liquid into a wavy filter, distribute the silica powder on the surface of the filter, and reduce the filter pores. This method can leave the metal powder in the waste liquid in the filter, but it is unavoidable to mix it with the silica powder, and after that, the process of separating the silica powder and the metal powder with chemical substances is quite laborious. It causes environmental pollution at the same time as chemical substances or heavy metals are included in the silica powder. Now, after such a wave filter has been used for a while, it is necessary to stop the machine for 30 minutes and add the silica powder again, so the wastewater from the manufacturing process at that time overflows and is discharged to the outside without being treated. Rivers or rice fields will be polluted. Therefore, protests from nearby residents or accusations from environmental protection agencies are often received.

  Another method using chemical treatment is to put sodium hydroxide into a stirring tank, neutralize the acidic waste liquid, and then feed it into a squeeze filter to proceed with filtration and separation. The subsequent cupric sulfate solution and insoluble material are reprocessed and recycled. The Republic of China Patent Publication No. 363905 or 453138 is based on the above method. However, in this method, since the process occupies a lot of space, the cost is high, and the additive is almost toxic, the waste after the processing of the whole process becomes a factor of destroying the environment.

  Another method is to collect with a micron ceramic filter. However, in this method, the recovered copper powder easily adheres to the ceramic filter and is difficult to remove, and the filtering effect is not as expected. Taiwan Patent Publication No. 567897 is based on the above structure. Further, the filtration method using another filter core is not suitable for this type of collection device because it has a drawback that it is difficult to remove the copper powder when it is used to collect and collect copper powder.

  Another filtration method is to use filtration by centrifugation. However, centrifugal force can cause waste liquid to leak out of the filter, so it is a disadvantage that clean water cannot be recovered and recycling can be provided to the manufacturing process.

  The main object of the present invention is to send waste liquid to one filter cylinder or one or more parallel filter cylinders via a pump, and to control the flow rate of waste liquid fed by the pump by controlling the pressure of the filter cylinder. Achieves the most favorable filtration effect, can prevent danger due to excessive pressure, rupture the filter bag, and overflow of the pump pressure sensing alarm and waste liquid collection tank An object of the present invention is to provide a water resource precision recovery device that can achieve the effect of multiple safety by using a level electrode.

  Another object of the present invention is to provide a precise filter composed of a composite of multi-layered cloth by jetting waste liquid from the cylinder lid to the inside of the cylinder from the top to the bottom when sending the waste liquid into the filter cylinder. In order to separate the waste water in the filter, the waste water is collected by the precision filter and does not contain any waste liquid. It is an object of the present invention to provide a water resource precision recovery device that ensures that the environment is not polluted without being discharged and that the recovered resources can be sufficiently operated.

  Another object of the present invention is to manufacture a precise filter by a method of joining without gaps, and not only prevents the filter bag from rupturing during filtration, but also causes the waste liquid to leach into the filter. An object of the present invention is to provide a water resource precision recovery device that can completely prevent this and ensure that recovered water is returned to the manufacturing process and recycled.

  Another object of the present invention is to effectively separate the metal powder in the waste liquid by a precise filter and leave it in the bag portion of the filter, forcibly separate the moisture in the metal powder through the auxiliary pressure, and dry it. The filter that presents a handbag can be easily removed from the filter tube and replaced with a new filter, so that the replacement process can be completed in just a few tens of seconds, the dry metal powder can be easily concentrated and collected, and the removed filter can be cleaned. Another object of the present invention is to provide a water resource precision recovery device that is reusable.

  Another object of the present invention is that when one or more filter tubes are arranged in parallel, even if one of the filters is replaced, the waste liquid is continuously filtered by the other filter tubes without stopping the machine. It is an object of the present invention to provide a water resource precision recovery device that can reliably meet the demand for environmental protection without overflowing waste liquid from the polishing or corrosion process and discharging it outside the factory.

In order to achieve the above object, a water resource precision recovery apparatus according to the present invention includes a waste liquid collection tank, a pump, at least one filter cylinder, and a filtrate recovery tank.
The waste liquid collection tank collects waste liquid discharged in the manufacturing process.
The pump has an extraction end connected to a waste liquid collection tank via an extraction pipe, and a delivery end connected to a transport pipe.

The filtration cylinder has a cylinder part and a cylinder lid, and has a mesh hole tank whose upper part is open in the cylinder part, and the opening faces upward by forming a support surface on the periphery of the mesh hole tank. The filter is composed of a bag portion manufactured by heat welding of a multilayer cloth composite, and a positioning frame joined to the upper portion of the bag portion by heat welding. The positioning frame is formed on the support surface by the outer edge of the frame. The cylinder lid is mounted on the upper part of the cylinder part by one or more locking units, has an extension part at one end of the lid, and has a curved outlet at the inner edge of the extension part. A liquid injection tube connected to the curved injection port is connected to the curved injection port, a bottom end of the liquid injection tube is connected to a transport pipe of the pump, and a pressure meter is provided on the lid.
The filtered water collection tank is attached to the bottom of the filtration cylinder below the collection pipe and collects filtrate water flowing out from the filtration cylinder.

  FIG. 1 is a diagram showing a water resource precision recovery apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram showing filtration bypass by a water resource precision recovery apparatus according to an embodiment of the present invention. As shown in FIGS. 1 and 2, a water resource precision recovery apparatus according to an embodiment of the present invention includes a waste liquid collection tank, a pump, at least one filter cylinder, and a filtered water recovery tank.

  The waste liquid collection tank 10 collects the waste liquid 12 discharged through the pipe line 11 in the manufacturing process. In the manufacturing process, it refers to the corrosion or polishing of the printer circuit board, and the waste liquid in this manufacturing process contains copper powder or other metal powder.

  The pump 20 has an extraction end connected to the waste liquid collection tank 10 via an extraction pipe 21 and a delivery end connected to a predetermined amount of the filter cylinder 30 via a transport pipe 22, thereby removing the waste liquid 12 from the filter cylinder 30. The waste liquid 12 is converted into clean filtered water 42 and allowed to flow into the filtered water recovery tank 40 through the recovery pipe 41 on the bottom of the filter cylinder 30.

  In addition, the extraction pipe 21 of the pump 20 includes the backflow prevention valve 23, so that backflow of waste liquid in the pipe can be prevented. Since the pump 20 has the pressure sensing alarm 24 at the delivery end, when the output pressure of the pump 20 exceeds the set value, it is possible to stop the operation of the pump 20 and enhance the safety of the filtration process. The end of the transport pipe 22 that continues to the filter cylinder 30 has an open / close valve 25.

  FIG. 3 is a cross-sectional view of a filter cylinder by a water resource precision recovery apparatus according to an embodiment of the present invention. The filtration cylinder 30 has a cylinder part 31 and a cylinder lid 32, and the cylinder part 31 has a mesh hole tank 33 that opens upward, and a support surface 312 is formed on the periphery of the mesh hole tank 33. Thus, the filter 70 whose opening is upward is positioned. As shown in FIG. 4, the filter 70 is composed of a bag portion 71 and a positioning frame 72, and the bag portion 70 is formed into a bag shape with a soft filter material 80 composed of a multilayered cloth composite, and its joining surface 711 is Since it is not manufactured by the sewing method and is manufactured by heat welding 712, the bag portion 71 has no seam, and the filtration effect can be secured without being ruptured from the seam. A positioning frame 72 is coupled to the upper portion of the bag portion 71 by a method of thermal welding 712. The positioning frame 72 may be made of a plastic material, joined to the bag portion 71 by heat welding, and the positioning frame 72 is mounted on the support surface 312 by a frame outer edge 721 as shown in FIG. The entire filter 70 is positioned in the mesh hole tank 33 and can filter the waste liquid 12 that is fed. Further, the net hole tank 33 has rigidity and may be used for positioning the filter 70. As shown in FIG. 4, the filter 70 has two handles on the inner edge of the positioning frame 72.

As shown in FIG. 3, the cylinder lid 32 is mounted above the cylinder portion 31 by one or more locking units 34, and the locking unit 34 is configured by commonly used general pressure vessel bolts 341 and nuts 342. Of these, the bottom end of the bolt 341 is joined to the convex ear 343 on the side of the cylindrical portion 31, so that the lid 32 can be opened in one direction when the annular nut 342 is loosened. Since this is a well-known technique (Prior Art) and is not the claimed scope of the present invention, a detailed description is omitted. One of the important features of the present embodiment is that the lid 32 has an extended portion 321 on the front side, the extended portion 321 has a curved outlet 322 on the inner edge, and the cylindrical portion 31 is connected to the curved injection port 322. There is a liquid injection pipe 311 connected to it at the opposite position, the bottom end of the liquid injection pipe 311 is connected to the transport pipe 22 of the pump, and there is an opening / closing valve 25 therebetween, and the lid 32 is above the pressure meter 35. It is to have.
The liquid injection pipe 311 of the filter cylinder 30 is connected to the air supply pipe 51. As shown in FIG. 2, the air supply pipe 51 provides a pressure source by the pneumatic device 50, and the air supply pipe 51 has an opening / closing valve 52 on the upper side.

  With the above configuration, as shown in FIGS. 1 to 3, when the pump 20 sends the waste liquid 12 to the curved injection port 322 via the transport pipe 22 and the liquid injection pipe 311, the waste liquid 12 flows from the bottom to the top and curves. It bends at the injection port 322, and then is jetted into the filter 70 from the top to the bottom. At that time, the jet method of the waste liquid does not give an impact to the filter 70 like a water column, and falls into the filter 70 by a diffusion method. Then, the pressure is uniformly dispersed, and the metal powder 121 in the waste liquid comes to adhere relatively uniformly to the inner wall surface of the bag portion 71. Further, the bag portion 71 is shown in FIGS. In addition, it is composed of a soft filter material 80 formed of a multi-layer fabric composite. For example, according to a test report of the China Spinning Industry Research Center, the soft filter material 80 is in the form of a non-woven nonwoven fabric. By air permeability of charge 80 is set within a predetermined range, the density of the filtration material are those that can withstand the penetration of the metal powder 121. In this embodiment, the filtering material is formed by a composite of five layers of cloth, and all of the five layers of cloth are formed of polypropylene, and as shown in FIG. 22 mm, the thickness of the second layer fabric 82 is 3.1 mm, the thickness of the third layer fabric 83 and the fourth layer fabric 84 is 0.24 mm, and the thickness of the fifth layer fabric 85 is 0. 37 mm. This multilayer composite polypropylene filtration material 80 has an air permeability of 4.6 (cc / cm2 / sec) when the area is 3.8 cm and the pressure is 125 Pa. From this numerical value, it is considered that the precision of the diameter of the hole is higher than the diameter of the hole formed by applying to the filter with a well-known silica powder. In other words, if the waste liquid 12 passes through a single layer of filtering material 80 and is precisely filtered by a jet method, the filtering effect is better than that of a conventional silica powder-containing filter. And, for example, according to the report of the water quality sampling survey of Motochi University Environmental Science Center, the effluent (raw water) before filtration has a turbidity of 420 NTU, the copper content is 516 mg / L, and the silica powder containing filter The filtered water has a turbidity of 1.3 NTU and a copper content of 1.17 mg / L. On the other hand, the filtered water after being filtered according to the present example has a turbidity of 1.1 NTU and a copper content of 0.60 mg / L, both of which are superior to the filtered water of a quartzite powder-containing filter. . The concentration level of hydrogen ions is 7.2, which is close to neutral PH7. From this numerical value, it is thought that the filtration effect by a present Example is superior to the filtration method containing a silica powder. Moreover, the present Example does not have a problem that it takes time and effort for the subsequent processing unlike the filtration method containing silica powder.

Another feature of the present invention is to detect the filtration status and safety control based on the internal pressure of the filter cylinder 30 or the pressure of the pump 20 and the water level altitude of the waste liquid collection tank 10.
As shown in FIG. 6, when the pressure meter 35 reaches a predetermined pressure value, that is, when the internal metal powder 121 reaches a certain amount and is not replaced with a new filter 70, the filtering effect is lowered. . In that case, the on-off valve 25 of the waste liquid transport pipe 22 is turned off (OFF), the cylinder lid 32 is opened, and the filter 70 is taken out. However, the metal powder 121 adhering to the inside of the bag part 70 also contains moisture. For this purpose, this embodiment further provides a pressure assist device. As shown in FIG. 2, the liquid injection tube 311 of the filter cylinder 30 is connected to the air supply tube 51, the air supply tube 51 provides a pressure source by the pneumatic device 50, and the air supply tube 51 has an opening / closing valve 52 on the upper side. Before opening the tube lid 32, the air supply pipe opening / closing valve 52 is turned on (ON), and at the same time, the atmospheric pressure 53 is fed into the filter 70, and the moisture in the metal powder is blown out of the bag portion, and the metal powder 121. Will pile up on the bottom.

  As shown in FIG. 7, when the opening / closing valve 52 of the air supply tube is turned off (OFF) and the cylinder lid 32 is opened, the handle 722 is lifted with a finger, the filter 70 can be taken out, and can be easily replaced. Further, even if one of the filter cylinders 30 is turned off and the filter 70 is replaced, the other filter cylinders 30 in parallel are not affected, and the waste liquid processing is continued.

  As shown in FIGS. 1 and 2, in this embodiment, in addition to detecting the internal pressure of the filter cylinder 30 by the pressure meter 35, the pressure sensor alarm 24 at the delivery end of the pump 20 is used to detect the internal pressure of the filter cylinder 30. When the pressure is detected and the pressure reaches a set value, the pump 20 is automatically stopped to prevent the waste liquid 12 from being fed into the filter cylinder 30. Further, when the water level of the waste liquid collecting tank 10 reaches a predetermined altitude, the overflow level electrode (water level sensor) 13 outputs a signal to the control box 60 and emits sound and light by the warning lamp 62 to inform the on-site worker. Notify that the filter cylinder 30 should be arranged. The aforementioned control box 60 may be mounted on one side of the machine base 90, and has a required control button 61 thereon. Since the control box 60 is a common mechanism, a detailed description is omitted.

  According to the above technical means, in this embodiment, the waste liquid 12 is sent to the filter cylinders 30 arranged in parallel by the pump 20 and flows into the filter 70 by a method of jetting from the top to the bottom. The effect of microfiltration can be achieved by allowing the metal powder 121 in 12 to sufficiently remain inside the bag portion. In addition, as shown in the test report, the recovered water collected by the filtered water recovery tank 40 satisfies its original water requirements in the manufacturing process. Therefore, the filtered water 42 collected by the circulation pipe 43 or the second pump 44 can be sent back to the manufacturing process and recycled, and the collected resources can be fully used, and the effect of environmental protection can be achieved.

  Although the present invention has been invented for the manufacture of printer circuit boards, the present invention is not limited to use in the PCB industry and is applicable to all wastewater treatments of the same nature. And since the whole unit can be mounted on the machine base 90, the volume is small without occupying space, and it is excellent in safety and practicality as compared with the current wastewater treatment method, and has an economic effect.

It is a schematic diagram which shows the water resource precision collection | recovery apparatus by one Example of this invention. It is a schematic diagram which shows the bypassing of filtration of the water resource precision collection | recovery apparatus by one Example of this invention. It is sectional drawing which shows the filter of the water resource precision collection | recovery apparatus by one Example of this invention. It is a three-dimensional sectional view showing a filter of a water resource precision recovery device according to an embodiment of the present invention. It is a schematic diagram which shows the filter composite multilayer cloth of the water resource precision collection | recovery apparatus by one Example of this invention. It is sectional drawing which shows the filter cylinder of the water resource precision collection | recovery apparatus by one Example of this invention. It is a schematic diagram which shows replacement | exchange of the filter of the water resource precision collection | recovery apparatus by one Example of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Waste water collection tank, 11 Pipe line, 12 Waste liquid, 13 Overflow level electrode, 20 Pump, 21 Extraction pipe, 22 Transport pipe, 23 Backflow prevention valve, 24 Pressure detection alarm, 25 On-off valve, 30 Filter cylinder, 31 Tube part , 32 Cylinder lid, 33 Net hole tank, 34 Locking unit, 35 Pressure meter, 40 Filtration water recovery tank, 41 Recovery pipe, 42 Filtration water, 43 Circulation pipe, 44 Second pump, 50 Pneumatic pressure device, 51 Air supply pipe, 52 On-off valve, 53 bar, 60 control box, 61 control button, 62 warning lamp, 70 filter, 71 bag part, 72 positioning frame, 80 filter material, 81 1st layer fabric, 82 2nd layer fabric, 83 3rd layer Cloth, 84 fourth layer cloth, 85 fifth layer cloth, 90 machine base, 121 metal powder, 311 liquid injection tube, 312 support surface, 321 stretched part, 22 curved injection port, 341 volts, 342 nuts 343 protruding ears, 711 bonding surface, 712 heat welding, 721 frame outer edge 722 handles

Claims (10)

A waste liquid collection tank for collecting waste liquid discharged in the manufacturing process;
A pump whose extraction end is connected to the waste liquid collection tank via an extraction pipe and whose delivery end is connected to a transport pipe;
A filter having a tube portion and a tube lid, and having a mesh hole tank opened upward in the tube portion, and a support surface formed on the periphery of the mesh hole tank so that the opening is upward The filter is made up of a bag part that is manufactured by thermal welding of a multilayer cloth composite and a positioning frame that is joined above the bag part by thermal welding, and the positioning frame is mounted on the support surface by the outer edge of the frame The cylindrical lid is mounted above the cylindrical portion by one or more locking units, has an extended portion at one end of the lid, has a curved outlet at the inner edge of the extended portion, and is connected to the curved injection port of the cylindrical portion. There is a liquid injection pipe connected to the opposite position, the bottom end of the liquid injection pipe is connected to the transport pipe of the pump, and at least one filter cylinder having a pressure meter on the lid;
A filtered water recovery tank that is mounted below the recovery pipe on the bottom surface of the filter cylinder and collects filtered water flowing out of the filter cylinder;
Water resource precision recovery device characterized by comprising.   The water resource precision recovery apparatus according to claim 1, wherein the extraction pipe of the pump has a backflow prevention valve.   The water resource precision recovery apparatus according to claim 1, further comprising a pressure sensing alarm at a delivery end of the pump.   The water resource precise recovery device according to claim 1, wherein the filtered water recovery tank has a second pump that sends the filtered water to the manufacturing process for recycling.   2. The water resource precise recovery apparatus according to claim 1, wherein there are a large number of filter cylinders, and the liquid injection pipe and the transport pipe on the side of the cylinder part are mounted in parallel.   6. The water resource precise recovery apparatus according to claim 1, further comprising an open / close valve between the liquid injection pipe and the transport pipe.   6. The liquid injection pipe of the filter cylinder is connected to an air supply pipe, the air supply pipe provides an air pressure source by a pneumatic device, and has an open / close valve on the air supply pipe. Water resource precision recovery equipment.   The water resource precision recovery apparatus according to claim 1, wherein the filter positioning frame has two handles on the inner periphery.   The water bag precision recovery device according to claim 1, wherein the bag portion of the filter is made of a filtering material formed by a composite of five layers of polypropylene.   The water resource precision recovery apparatus according to claim 1, wherein an overflow level electrode is provided on the waste liquid collection tank.

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