JP2011025184A - Dehydrating treatment equipment for spent diatomaceous earth filter medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide dehydrating treatment equipment which is compact and continuously dehydrates a spent diatomaceous earth filter medium into the desired quantity of water with small labor and allows the dehydrated spent diatomaceous earth filter medium to be disposed of. <P>SOLUTION: The dehydrating equipment comprises a storage tank having stirring device and storing a treating material prepared by adding a prescribed quantity of water to the diatomaceous earth filter medium stripped from a filtration filter arranged in a filtration tank and adjusting them, a constant feed pump having a suction port connected to the storage tank and a decanter type centrifugal separator connected to the discharge port of the constant feed pump. The dehydration is carried out by continuously supplying the treating material stored in the storage tank to the decanter type centrifugal separator at a constant amount by the constant feed pump and continuously separating the treating material into a cake-like solid comprising the diatomaceous earth filter medium and water by the decanter type centrifugal separator. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a treatment facility for a diatomaceous earth filter material after use in a diatomaceous earth filter used as various filtering means.

  Recently, when filling bottles with drinks such as tea, mineral water, and alcoholic beverages, in order to prevent a drop in product value due to turbidity in the drink, As one of the final treatment means for drinks for the purpose of improvement, for example, as disclosed in Japanese Patent Application No. 11-281256, Japanese Patent Application Laid-Open No. 2000-189055, etc., diatomaceous earth with a diatomaceous earth filter material disposed on the surface Diatomaceous earth is used as a filter material in various applications as it is filtered.

  By the way, since the diatomaceous earth filter material accumulates fine solids in a large number of small holes formed in itself, the filter performance deteriorates due to clogging when used frequently. There is a need to.

  At this time, used diatomaceous earth filter material placed on the surface of the filtration filter installed inside the filtration tank, for example, blows backwash air into the filtration tank and drops it together with the filtrate at the bottom of the filtration tank. It is common to dehydrate and discard.

  In particular, diatomaceous earth, which is a component of diatomaceous earth filter media, is a siliceous deposit produced mostly from diatom remains (diatom shell), which is a unicellular algae, and is a mixture of clay, volcanic ash, organic matter, etc. When used for the filtration of various drinks such as tea, mineral water, wine and beer, even if it is administered as it is to the soil, it does not harm the global environment.

  However, since the essence of the diatomaceous earth filter material is a colloidal form of water-containing amorphous silicon dioxide, the diatomite filter medium itself absorbs and retains about four times the weight of water. In particular, the diatomaceous earth filter material washed out from the filtration tank is in a state of being mixed with the filtrate so that it has a large amount of water and is in a slurry state and is transported as it is without being dehydrated and discarded to the soil. Not only is this very difficult, but the capacity is also expensive.

  Therefore, conventionally, the used hydrated slurry diatomaceous earth filter material taken out from the filtration tank is filled in a vertical storage container such as a drum can and allowed to stand, and the supernatant liquid in which the diatomaceous earth filter material settles is used. The remaining cake-like diatomaceous earth filter material was scraped out, transported, and discarded.

  Therefore, a great amount of labor, a long time and a wide work area are required, and there is a problem that continuous work cannot be performed.

  Also, instead of the large number of drum cans that require a wide range of installation locations and a lot of manpower, the used diatomite filter media is stored in a large storage tank in a lump and mechanically pressed by means of pressure such as screws and presses. Although measures are taken to expedite dehydration time by pressing, large sized storage tanks that store used diatomaceous earth filter media at once and pressurize and dehydrate are necessary, and maintenance is also extensive. Furthermore, since the dehydration operation cannot be performed continuously, a large amount of used diatomaceous earth filter material must be stored and processed at one time, which requires a lot of labor during the operation.

  Furthermore, as one of the means for solving the above problems, a dehydration filter equipped with a dehydration filter that pressurizes and dehydrates a used diatomite filter medium in a filter tank in which a diatomite filter medium is disposed with pressurized air disposed below the filter medium. In the processing means for dehydrating and introducing into a cylinder, means for speeding up the filtration (dehydration) by stirring and mixing the used diatomaceous earth and the processing liquid (filtrate) with a mixer before introducing into the dehydrating cylinder is disclosed in JP-A-6-309. In this case as well, it is necessary to place a mixer and dewatering cylinder below the heavy, large filtration tank, which is impractical and inefficient in work. When dehydrating the diatomaceous earth filter material, there is a problem that the filtration tank cannot be used and work efficiency is poor.

Japanese Patent Application No. 11-281256 JP 2000-189055 A JP-A-6-309

  The present invention has been made to solve the above-described problems, and provides a dehydration treatment facility that can dehydrate and discard a used diatomaceous earth filter material to a desired amount of water continuously with a small amount of labor. It is to provide.

  The dewatering equipment for used diatomaceous earth filter material according to the present invention, which has been made to solve the above problems, is a treatment material prepared by adding a predetermined amount of moisture to a diatomaceous earth filter material peeled off from a filtration filter disposed in a filtration tank. And a decanter centrifuge connected to the discharge port of the fixed supply pump. The treated material is quantitatively continuously supplied to the decanter-type centrifuge by the quantitative feed pump, and continuously into cake-like solids and moisture made of diatomaceous earth filter material by the decanter-type centrifuge. It is characterized in that it is separated and dehydrated.

  Further, in the present invention, the decanter centrifuge is placed on a pedestal on which a container can be freely placed in and out of a space formed below, and the decanter centrifuge is placed on a placement part of the cradle. A structure in which cake-like solids made of dehydrated diatomaceous earth filter material taken out from the solid matter outlet are continuously dropped by penetrating the solid matter outlet in the vessel to expose the opening in the space. In this case, the dewatered diatomaceous earth filter material can be continuously collected. In particular, when the container is a split type loading platform attached to the transport vehicle, the transport vehicle can be used without being reloaded. Can be transported to a disposal site and is extremely efficient.

  Furthermore, by setting the water content of the processing material stored in the storage tank to about 110 to 120% by weight, the stored processing material can be easily decanted with a predetermined supply amount even if a normal metering pump is used. Can be continuously supplied to the mold centrifuge, and when the water content of the solid after dehydration by the decanter centrifuge is 65% by weight or less, it is contained during transportation and disposal. There is no adverse effect due to moisture, and the volume and weight are reduced, which is economically advantageous.

  In addition, when the surface of the screw conveyor forming the decanter centrifuge is covered with a hard tile material, the diatomaceous earth filter material having a polishing action enough to be used for the abrasive and the screw conveyor are in contact with each other. However, wear can be reduced and durability can be increased.

  According to the present invention, a used diatomaceous earth filter medium can be dehydrated continuously to a desired amount of water with a compact facility and with a small amount of labor, and can be disposed of very efficiently.

Explanatory drawing which shows the outline of the dehydration processing equipment of the used diatomaceous earth filter material which is this invention. It is a cross-sectional enlarged view of the decanter-type centrifuge used for embodiment shown in FIG.

  FIG. 1 shows an outline of equipment for dehydrating a diatomaceous earth filter material 12 disposed in a filter 11 installed in a filter tank 1 used for drinking tea, for example. An accumulation tank 2 for forming a treatment material 21 by adding a predetermined amount of water to the diatomaceous earth filter material 12 disposed below the filter tank 1 and peeled off from the filter filter 11 disposed in the filter tank 1; A supply pump 3 for conveying the processing material 21 in the accumulation tank 2, a storage tank 4 with a stirring device 41 for storing the processing material 21 conveyed by the supply pump 3, and a suction port in the storage tank 4 51, and the surface of the screw conveyor 61 connected to the discharge port 52 of the fixed supply pump 5 is covered with a tile made of a hard material such as tungsten carbide. Decanter type centrifuge 6.

  The decanter centrifuge 6 is placed on a gantry 7 in which a storage container 8 can be freely placed in and out of a space 71 formed below, and the decanter centrifuge 6 is placed from a placement surface. The solid matter outlet 62 is penetrated to expose the opening in the space 71 formed on the lower side, and the lower end of the moisture outlet 63 opens to the drainage groove 13 formed on the ground surface or the like.

In the drawings, reference numeral 9 is a water channel connected to, for example, a source of purified water H (tap water, groundwater, etc.), 91 is a three-way valve disposed in the water channel, and 92 is an electromagnetic valve. Also,
At the lower end of the moisture outlet 63 in the decanter type centrifuge 6, a moisture receiving tank 101 is disposed, and a pump 102 and a three-way solenoid valve 103 are connected to the moisture receiving tank 101. One discharge port of the three-way solenoid valve 103 is connected to the water channel 104 to the drainage groove 13 constructed on the ground surface, and the other discharge port is connected to the water channel 105 to the stirring device 4 to the four. Has been.

  Next, the usage method of this Embodiment is demonstrated in detail.

  First, when replacing the diatomaceous earth filter material 12 in the filtration tank 1 that is filtering the drink, for example, the diatomaceous earth filter material 12 peeled from the filter 11 by blowing back washing air into the filter tank 1 is used. The collected liquid 21 is dropped together with the filtrate into the accumulation tank 2 disposed at the bottom of the filtration tank 1, and if necessary, the treated product 21 having a predetermined water content by adding purified water H from the water channel 9 is supplied to the storage tank 3 by the supply pump 3. Transport.

  The moisture content of the processed product 21 is not limited as long as it can be transported by the supply pump 3. However, for example, when it is 110 to 120% by weight, it can be transported and the entire volume can be reduced. The volume of the tank 4 can be reduced, the dewatering time of the decanter centrifuge 6 can be reduced, and water generated by dehydration can be reduced.

  And the processed material 21 stored in the said storage tank 4 is always kept homogeneous by the stirring apparatus 41 (the used diatomaceous earth filter material is the slurry of the predetermined water content), and is stored and stored. A thing is continuously supplied to the decanter-type centrifuge 6 at a predetermined flow rate by a fixed supply pump 5 from an outlet 42 formed at the bottom. In addition, about the storage tank 4, it can prevent that fluidity falls by low temperature by enabling heating with means, such as a heating steam and a heating coil.

  FIG. 2 shows the details of the decanter type centrifugal separator 6. The outer rotating cylinder 72 extending in the lateral direction inside the case 71 and a slight radial gap inside thereof are held in a spiral shape. This is a conventionally known configuration in which a screw conveyor 73 having blades 731 is provided so as to be relatively rotatable at a high speed by a main motor 741, a differential machine 742, and a gear box 743.

  The outer rotating cylinder 72 includes a large-diameter parallel portion 722 provided with an overflow port 721 for moisture 211 separated at the left end in the figure, and a solid material 212 (diatomaceous earth filter material separated at the right end in the figure continuously from this. ) Having an outer rotating cylinder 72 that rotates at a high speed, and has a slight radial gap inside the outer rotating cylinder 72 to form a spiral conveyor blade. A screw conveyor 73 having 731 is provided to be relatively rotatable.

  The processing material 21 supplied from the insertion port 751 formed in the shaft 75 of the screw conveyor 73 is transferred from the discharge port 752 formed in the middle of the shaft 75 of the screw conveyor 73 to the screw conveyor 73 and the outer rotating cylinder. 72, the water 211 is discharged from the overflow port 721, the cake-like solid matter (diatomaceous earth filter material) 212 is continuously discharged from the discharge port 722, respectively, It is discharged from a moisture outlet 63 and a solid outlet 62 formed at the lower end of the case 71.

  At this time, in the present embodiment, as shown in FIG. 1, the open end formed below the solid material outlet 62 is disposed through the frame and formed below the frame 7. Since the container 8 that can be freely placed in and out of the space 71 is opened, cake-like solid matter (diatomaceous earth filter material) 212 continuously discharged from the solid matter outlet 62 is accumulated, so a predetermined amount. When the water is deposited, the container 8 is pulled out and a new empty container is arranged to continuously perform dehydration.

  In the present embodiment, in particular, the container 8 is used as a split type loading platform for the transporting vehicle (not shown), so that the transporting vehicle is simply connected to the connecting portion of the container 8 so that it becomes a loading platform as it is. It can be transported very easily without transshipment.

  In the present embodiment, a moisture receiving tank 101 is disposed at the lower end of the moisture outlet 63 in the decanter centrifuge 6, and the moisture receiving tank 101 includes a pump 102 and A three-way solenoid valve 103 is connected, and one discharge port of the three-way solenoid valve 103 is connected to the water channel 104 to the drainage groove 13 constructed on the ground surface, and the other discharge port is connected to the storage tank 4. A water channel 105 to is connected. Therefore, by confirming the state of the moisture receiving tank 101, it can be confirmed that the moisture is normally separated in the decanter type centrifuge 6, and the separated moisture is passed through the water channel 105 if necessary. Thus, it can be used as moisture used in the storage tank 4.

  In the present embodiment, the water channel 105 for transporting the waste water and the water channel 9 for transporting the purified water are connected to the accumulation tank 2, the supply pump 3, the storage tank 4, the metering supply pump 5, and the decanter centrifuge 6 shown in FIG. 1. Since they are connected, cleaning of each device can be facilitated.

  Further, since tiles are formed on the surface of the screw conveyor 61, contact wear can be dealt with even if a diatomaceous earth filter material having a polishing effect is processed.

  Furthermore, according to the present embodiment, the metering pump 3, the decanter centrifuge 6, and further the electromagnetic valve 91 and the like are electronically controlled by a control device (not shown) to be fully automated ( It is also possible to achieve unmanned operation.

  A treatment material prepared by adjusting the water content of the used tea-containing diatomaceous earth filter medium used for drinking tea to the present invention (diatomite: water = 13: 100) is stored in a resin storage tank, and a fixed amount supply pump (discharge amount) 300 L / h) and supplied to a decanter centrifuge (TSH005 type Tomoy-decanter manufactured by Sakai Kogyo Co., Ltd.) and dehydrated at 3200 RPM for 4 hours.

  As a result, almost 50 kg of cake-like solid (diatomaceous earth filter material) having an average water content of 65% or less can be continuously separated from the decanter type centrifuge, and it was confirmed that the present invention is extremely effective. .

DESCRIPTION OF SYMBOLS 1 Filtration tank, 2 Accumulation tank, 4 Storage tank, 5 Metering supply pump, 6 Decanter type centrifuge, 7 Mount, 8 Storage container, 11 Filtration filter, 12 Diatomaceous earth filter material, 21 Treatment material, 41 Stirrer, 42 Outlet, 51 Suction port, 52 Discharge port, 62 Solid matter outlet, 71 Space, 212 Solid matter

Claims (6)

  A storage tank with a stirrer for storing a treatment material prepared by adding a predetermined amount of water to a diatomaceous earth filter material separated from a filtration filter disposed in the filtration tank, and a quantitative supply pump having a suction port connected to the storage tank A decanter centrifuge connected to the discharge port of the metering supply pump, and the processing material stored in the storage tank is quantitatively continuously supplied to the decanter centrifuge by the metering pump. A dewatering equipment for a used diatomaceous earth filter material, wherein the decanter earth filter is continuously separated into a cake-like solid material made of diatomaceous earth filter material and moisture and then dehydrated.   The decanter-type centrifuge is placed on a pedestal on which a container can be freely placed in and out of a space formed below, and a solid material outlet in the decanter-type centrifuge is placed on the pedestal placement part. The cake-like solid material made of dehydrated diatomaceous earth filter material taken out from the solid material outlet is continuously dropped, with the opening being exposed to the space by penetrating the material. Of used diatomite filter material.   The dewatering treatment facility for used diatomaceous earth filter material according to claim 2, wherein the container is a split type loading platform attached to a transport vehicle.   The water content of the said processing material is 110 to 120 weight%, The dehydration processing equipment of the used diatomaceous earth filter material of Claim 1, 2 or 3.   The dewatering equipment for used diatomaceous earth filter material according to claim 1, 2, 3 or 4, wherein the water content of the solid after the dewatering treatment by the decanter centrifuge is 65% by weight or less. 6. The dewatering equipment for used diatomaceous earth filter material according to claim 1, wherein a surface of a screw conveyor forming the decanter centrifuge is covered with a hard tile material. .

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