JP5011419B2 - High water pressure water purification system - Google Patents

Description

  The present invention relates to a high-pressure water purification apparatus that can perform continuous water purification operation for a longer time and is low in cost.

  As a technique for purifying wastewater using a liquid cyclone, for example, a wastewater purification facility described in Patent Document 1 is known.

  In this wastewater purification facility, raw water such as rainwater and domestic wastewater passes through a dust removal screen in the primary filtration box, is then supplied to the liquid cyclone device, and is further filtered by a purification mat and a sterilization mat in the tertiary filtration chamber. Thereby, the raw water is purified to clean water.

JP 2000-135500 A

  By the way, in order to rotate the raw water containing impurities at a sufficient speed in the liquid cyclone, a high-performance pump that feeds the raw water into the liquid cyclone at a high pressure is required. For this reason, the manufacturing cost increases accordingly.

  Moreover, the conventional wastewater purification equipment may have a reduced filtration capacity due to, for example, clogging of the purification mat in the tertiary filtration layer. For this reason, it is necessary to periodically stop the filtration and perform back washing to regenerate the filtration capacity.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a high-pressure water purification apparatus capable of continuous water purification operation for a longer time at a lower cost.

  In order to solve the above-mentioned problem, in the present invention, while supplying raw water to a hydrocyclone accommodated in a water purification tank, a water flow including bubbles containing ozone gas is injected at a higher pressure than the raw water. Furthermore, the filter which partitions off the inside of a water purification tank is provided, and the water flow in which the bubble containing ozone gas was injected with respect to this filter from the liquid cyclone side at a pressure higher than raw | natural water.

For example, the present invention is a high water pressure water purification device that removes foreign matter from water to be treated,
A water purification tank that contains a liquid cyclone having a raw water supply port and a high-pressure water flow supply port, and stores underflow from the lower end opening of the liquid cyclone,
A drainage channel overflowing from the water purification tank, into which overflow from the upper end opening of the hydrocyclone flows;
Processing target supply means for supplying the processing target water from the raw water supply port to the inside of the hydrocyclone;
A first ejector nozzle attached to the high-pressure water flow supply port, and a water flow including bubbles containing ozone gas is introduced from the first ejector nozzle into the liquid cyclone in the inner circumferential direction of the liquid cyclone. And jet water jetting means for jetting at a higher pressure than the water to be treated.

In such a high water pressure water purification device,
A filter that partitions the interior of the water purification tank into a first chamber containing the liquid cyclone and a second chamber not containing the liquid cyclone;
The jet water flow injection means
A second ejector nozzle directed to the second chamber side through the filter is further provided, and a water flow including bubbles containing ozone gas is further injected from the second ejector nozzle toward the filter. You may make it do.

  ADVANTAGE OF THE INVENTION According to this invention, the high-pressure-pressure water purification tank which can perform continuous water purification operation over a longer time is realizable at lower cost.

FIG. 1 (A) is a schematic configuration diagram of a filtration system according to an embodiment of the present invention, and FIG. 1 (B) illustrates the overall configuration of the high water pressure water purification unit 2 shown in FIG. 1 (A). FIG. 2A is a top view of the water purification tank 22 included in the high water pressure water purification unit 2 of FIG. 1B, and FIG. 2B is a filter by jetting a high-pressure jet water stream containing bubbles. It is the figure which showed notionally the mode that the cake was removed from.

  Hereinafter, an embodiment of the present invention will be described.

  First, the overall configuration of the filtration system according to the present embodiment will be described.

  FIG. 1A shows a schematic configuration of a filtration system according to this embodiment.

  As shown in the figure, the filtration system according to the present embodiment is connected to a pretreatment unit 1 to which raw water (well water, irrigation, drainage, etc.) W1 from a raw water tank is supplied, and a subsequent stage of the pretreatment unit 1. High water pressure water purification unit 2. In addition, according to the water quality required for the final filtered water, an advanced filtration unit (ultrafiltration membrane) that further filters the filtered water W5 filtered by the high water pressure water purification unit 2 after the high water pressure water purification unit 2 (UF), nanofiltration membrane (NF), reverse osmosis membrane (RO), etc.) may be connected.

  The pretreatment unit 1 includes a raw water supply pump (not shown) that feeds the raw water W1 from the raw water tank, and a wedge screen dust removal device 11 that removes coarse suspended solids (SS) from the raw water W1 supplied by the raw water supply pump. Have. In addition, the wedge screen dust removing device 11 includes a water storage tank 111, a wedge screen 112 that is slanted over the water storage tank 111 so that the other end (hereinafter, lower end) side is lower than the one end (hereinafter, upper end) side, And an SS collection tank 113 disposed on the lower end side of the wedge screen 112.

  In such a pretreatment unit 1, when the raw water W1 from the raw water supply pump is supplied to the upper surface of the wedge screen 112 from the upper end side of the wedge screen 112, the primary filtered water (coarse suspended solids that have passed through the wedge screen 112 is removed). Water) W2 is stored in the water storage tank 111. Further, the coarse suspended matter (SS) that has flowed down along with the remaining raw water W <b> 1 on the upper surface of the wedge screen is discharged to the SS collection tank 113.

  On the other hand, the high water pressure water purification unit 2 includes a water purification tank 22 that is filled with fresh water at the start of filtration operation, a low pressure pump 21 that sends the primary filtrate W2 from the water storage tank 111 of the wedge screen dust remover 11 to the water purification tank 22 at a low pressure, and ozone gas. A jet water flow injection device 23 that injects a jet water flow W4 including bubbles including A into the water purification tank 22 at a high pressure.

  FIG. 1B shows a schematic structure of the high water pressure water purification unit 2, and FIG. 2A shows a top view of the water purification tank 22. In addition, in FIG. 1 (B) and FIG. 2 (A), with respect to the water purification tank 22, the depth direction is defined as the Z direction, the width direction is defined as the X direction, and the length direction is defined as the Y direction.

  As shown in the drawing, inside the water purification tank 22, two filters (coarse filter 225A, fine filter 225B) having different filtration accuracy and two liquids having both ends (lower end and upper end) opened. And a cyclone 226 is accommodated. Moreover, the drainage channel 224 with a drain outlet is provided in the exterior of each Y direction side wall of the water purification tank 22 along the edge of the opposing Y direction side wall.

  The interior of the water purification tank 22 is divided into three chambers (a centrifugal separation chamber 221 between one side wall in the X direction and the coarse filter 225A, the coarse filter 225A, and the fine filter by two filters 225A and 225B. It is partitioned into a filtration chamber 222 between the filter 225B and a water storage chamber 223) between the fine filter 225B and the other side wall in the X direction. Water outlets 221A, 222A, and 223A for draining water from the water purification tank 22 are provided on the bottom surfaces of the chambers 221 to 223, respectively.

  The two hydrocyclones 226 are arranged in the centrifuge chamber 221 in the X direction with the lower end opening (underflow port) 2261 facing the bottom surface of the water purification tank 22. Each hydrocyclone 226 is provided with a jet water flow supply port 2263 to which an ejector nozzle (described later) of the jet water flow injection device 23 is connected, in addition to the primary filtrate water supply port 2262 connected to the water outlet of the low pressure pump 21. It is tapered from a lower position than the primary filtrate water supply port 2262 and the jet water flow supply port 2263 so that the inner diameter gradually decreases as it approaches the underflow port 2261 facing the bottom surface of the water purification tank 22. Yes. Moreover, the overflow port 2264 of each hydrocyclone 226 is overflowed so that the overflow F1 from the opening (overflow port) 2264 on the upper end side of each hydrocyclone 226 overflows into the drainage channel 224 together with water near the water surface in the centrifugal separation chamber 221. Is provided at a position lower in the Z direction by an appropriate distance than the Y direction side wall of the water purification tank 22.

  The jet water jetting device 23 includes an ozone generator 231 that generates ozone gas A having an appropriate concentration, a high-pressure pump 232 that pumps fresh water W3 from a fresh water tank at a high pressure (for example, about 8 Mpa), and ozone gas A from the ozone generator 231 and And an ejector nozzle 233 group into which fresh water W3 from the high-pressure pump 232 is fed.

  Here, the ejector nozzle 233 mixes the ozone gas A from the ozone generator 231 in the fresh water W3 fed at a high pressure from the high pressure pump 232 in the vicinity of the throttle so that the ozone gas A having a sterilizing, deodorizing, and decolorizing action is mixed. A jet water stream W4 including a bubble group including the liquid is ejected from the discharge port (see FIG. 2B). Of the ejector nozzles 233, two ejector nozzles 233 are connected to the jet water flow supply ports 2263 of the respective hydrocyclones 226. Further, the other ejector nozzles 233 are arranged in the X direction toward the coarse filter 225A so that a part of the water in the centrifugal separation chamber 221 is pumped to the filtration chamber 222, and the rest are used for the water in the filtration chamber 222. They are arranged in the X direction toward the fine filter 225B so as to be pumped to the water storage chamber 223. The rows of ejector nozzles 233 in the centrifugal separation chamber 221 and the filtration chamber 222 have a depth of water that allows the jet water flow W4 including the bubbles including the ozone gas A to pass through the filters 225A and 225B while maintaining the pressure in the water. It is desirable that the water in the water purification tank 22 is disposed at a relatively clean position (for example, a shallow position).

  In such a high water pressure water purification unit 2, when the water purification tank 22 is filled with fresh water and then the low pressure pump 21, the ozone generator 231 and the high pressure pump 232 are driven, each liquid cyclone immersed in the water in the centrifugal separation chamber 221. The primary filtered water W <b> 2 is supplied into the interior of 226 at a low pressure, and a high-pressure jet water flow W <b> 4 involving bubbles including the ozone gas A is jetted in the inner circumferential direction of the hydrocyclone 226. As a result, the primary filtered water W2 containing foreign matter swirls inside each hydrocyclone 226 together with the high-pressure jet water flow W4, so that the overflow F1 containing foreign matter such as oil having a small specific gravity overflows from the overflow port 2264 while swirling. Thus, the water near the water surface in the centrifugal separation chamber 221 is discharged to the drainage channel 224 provided outside the both side walls in the Y direction of the water purification tank 22. On the other hand, the underflow F2 containing foreign matter having a large specific gravity is released from the underflow port 2261 into the water in the centrifugal separation chamber 221. However, the foreign matter having a large specific gravity is deposited on the bottom surface of the centrifugal separation chamber 221, so Clean water sterilized and deodorized with ozone gas A remains in the upper part.

  Further, since a high-pressure jet water flow W4 including a group of bubbles containing ozone gas A is also ejected from the ejector nozzle 233 to the upstream surface (upstream surface) of the coarse filter 225A, as shown in FIG. In addition, the water in the centrifugal separation chamber 221 is forcibly sent to the downstream filtration chamber 222 through the coarse filter 225A by the high-pressure jet water flow W4. As a result, cleaner water treated by the coarse filter 225 </ b> A and sterilized / deodorized with the ozone gas A is stored in the filtration chamber 222. Further, the foreign substance cake 30 remaining on the upstream surface of the coarse filter 225A by the filtration of water in the centrifugal separation chamber 221 is pulverized and removed by cavitation.

  Similarly, since the high-pressure jet water flow W4 including the bubbles including the ozone gas A is jetted from the ejector nozzle 233 to the upstream surface (upstream surface) of the fine filter 225B, as shown in FIG. In addition, the water in the filtration chamber 222 is forcibly sent to the downstream water storage chamber 223 via the fine filter 225B by the high-pressure jet water flow W4. Thereby, in the water storage chamber 223, cleaner water filtered by the fine filter 225B and sterilized and deodorized by the ozone gas A is stored. Further, the foreign substance cake 30 remaining on the upstream surface of the fine filter 225B due to the filtration of water in the filtration chamber 222 is pulverized and removed by cavitation.

  As described above, according to the present embodiment, since the high-pressure jet water flow W4 including the bubbles of the ozone gas A is injected into the liquid cyclone 226 separately from the primary filtered water W2, the primary filtered water W2 is used. Even if the liquid cyclone 226 is not fed at a high pressure, the speed of the swirl flow inside the liquid cyclone 226 can be ensured. Therefore, it is not necessary to provide a high-performance pump capable of injecting raw water containing foreign substances at a high pressure, and the manufacturing cost can be reduced correspondingly.

  In addition, since the high-pressure jet water stream W4 including the bubbles including the ozone gas A is jetted toward the upstream surface of the filters 225A and 225B, the foreign substance cake 30 remaining on the upstream surface of the filters 225A and 225B during the water purification operation. Is constantly pulverized and removed by cavitation (see FIG. 2B). Therefore, since the cake 30 does not adhere to the filters 225A and 225B, it is possible to prevent the filtering ability of the filters 225A and 225B from being lowered even if the filters 225A and 225B are not back-washed. For this reason, continuous water purification operation over a longer time is possible.

  Further, since the water to be filtered is press-fitted into the filters 225A and 225B by the high-pressure jet water flow W4, the filtration speed can be improved.

  Furthermore, since ozone gas A is contained in the bubble group of the jet water flow W4 injected into the chambers 221 to 223 in the water purification tank 22, it is possible to finally generate cleaner filtered water W5.

1: Pretreatment unit, 2: High water pressure water purification unit, 11: Wedge screen dust removal device, 21: Low pressure pump, 22: Water purification tank, 23: Jet water jetting device, 111: Water storage tank, 112: Wedge screen, 113: SS Collection tank, 221: centrifuge chamber, 222: filtration chamber, 223: reservoir, 224: drainage channel, 225A: coarse filter, 225B: fine filter, 226: hydrocyclone, 231: ozone generator, 232: high pressure pump 233: Ejector nozzle, 2261: Underflow port, 2262: Primary filtered water supply port, 2263: Jet water flow supply port, 2264: Overflow port

Claims (2)

It is a high water pressure water purification device that removes foreign substances from the water to be treated,
A water purification tank that contains a liquid cyclone having a raw water supply port and a high-pressure water flow supply port, and stores underflow from the lower end opening of the liquid cyclone,
A drainage channel overflowing from the water purification tank, into which overflow from the upper end opening of the hydrocyclone flows;
Processing target supply means for supplying the processing target water from the raw water supply port to the inside of the hydrocyclone;
A first ejector nozzle attached to the high-pressure water flow supply port, and a water flow including bubbles containing ozone gas is introduced from the first ejector nozzle into the liquid cyclone in the inner circumferential direction of the liquid cyclone. And a jet water jet means for jetting at a higher pressure than the water to be treated. The high water pressure water purification device according to claim 1,
A filter that partitions the interior of the water purification tank into a first chamber containing the liquid cyclone and a second chamber not containing the liquid cyclone;
The jet water flow injection means
A second ejector nozzle directed to the second chamber side through the filter is further provided, and a water flow including bubbles containing ozone gas is further injected from the second ejector nozzle toward the filter. A high water pressure water purifier characterized by

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