JPH07136636A - Device for separating water-bloom or the like - Google Patents

Abstract

PURPOSE:To improve the efficiency in treating water-bloom or the like by providing a main pump for pumping up the water containing water-bloom or the like to be treated from lakes and marshes and a sub-pump for discharging the water to be treated from above a position in a water-bloom separating tank from which the water is discharged from the pressurized contact decomposing tank. CONSTITUTION:The water containing water-bloom to be treated is pumped up into a pressurized contact decomposing tank 8 from a lake 1 by a main pump 2 and, during the pumping action, ozone is injected and added into the water by an ozonizer 6. The outlet opening of the pressurized contact decomposing tank 8 is connected to the lower side of a water-bloom separating tank 11 by a pipe. The water to be treated is pumped up from the lake 1 by a sub- pump 27 and is discharged from above a position in the separating tank 11 from which the water is discharged from the pressurized contact decomposing tank 8. In this way the water-bloom in the water from the sub-pump 27 is forced up by an upward current of the fine bubbles of ozone and oxygen formed in the ozone dissolved water from the pressurized contact decomposing tank 8 to decompose and agglomerate the water-bloom with ozone.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-bloom separation device for continuously separating water-blooms and the like generated in eutrophic reservoirs and lakes.

[0002]

2. Description of the Related Art In recent years, in lakes and marshes in various places, a so-called water-bloom phenomenon has become a problem in which eutrophication of water quality causes abnormal growth of single-celled algae, phytoplankton, etc., and makes the water surface muddy green.

[0003] In order to remove water-bloom and the like from such contaminated lake water and the like, conventionally, lake water and the like are pumped up and a flocculant is added, and then sand and filtration filters are used to contain the water-bloom and the like. Etc. have been separated, and the pH of fresh water from which water-bloom and the like have been removed is adjusted to pH, and then returned to lakes and marshes.

[0004]

However, in the above-mentioned conventional method, the filtering sand and the filtering filter are immediately clogged, and a certain amount of separation is performed by batch processing, which has a drawback of poor processing efficiency.

Further, since the conventional method only physically removes the water-bloom etc. by filtering the contaminated lake water etc., plankton etc. still survive in the fresh water returned to the lakes etc. after the filtering treatment. However, there is a problem that these residual plankton and the like start to grow again and the blue-green algae are regenerated in a short period of time.

The present invention has been made in view of the above circumstances, and provides an apparatus for separating water-bloom, etc., capable of continuously separating a large quantity of water-bloom, etc. with energy saving and delaying the re-generation of water-bloom, etc. Is what you are trying to do.

[0007]

In order to solve the above-mentioned problems, a water-bloom separation device according to claim 1 sucks up water to be treated containing water-bloom etc. from a lake or the like and connects it to an ozone generator on the suction side. Is connected to the discharge side of the main pump, and the pressure catalytic cracking tank whose inside is higher than normal pressure is connected to this pressure catalytic cracking tank. A water-separating tank, etc. from which the water to be treated is discharged from the pressure catalytic cracking tank, and the treated water is sucked up from the lake etc. The sub-pump that discharges the water to be treated at a higher position and the return pipe that returns the fresh water after the water-bloom and the like in the lower part of the water-bloom and the like separation tank are returned to the lake and the like.

Further, the water-bloom separating device according to claim 2 sucks up the water to be treated containing the water-bloom etc. from the lake and the like, and the main pump connected to the ozone generator on the suction side, and the discharge of this main pump. Connected to the
A pressurized catalytic cracking tank whose inside is higher than normal pressure, a sub-pump that sucks up the treated water from the lake or the like and discharges the treated water to an ejector provided on the discharge side of the main pump, A water-bloom separation tank which is connected to a pressure catalytic cracking tank and in which the water to be treated from the pressure catalytic cracking tank is discharged from the inside lower side thereof, and the water-bloom etc. inside the water-blowing water separation tank are separated. It is configured to have a return pipe for returning the fresh water to a lake or the like.

[0009]

The operation common to the inventions according to claim 1 and claim 2 will be described. First, the water to be treated containing the treated matter such as water-bloom is sucked up from the lake or the like by the main pump. An ozone generator is connected to the suction side of the main pump, and ozone is also sucked together with the water to be treated by the suction force of the main pump.
Then, the ozone is made fine by the cavitation action of the main pump and dissolved in the water to be treated. This is the ozone-dissolved treated water.

The ozone-dissolved treated water is sent to the pressurized contact treatment tank at a pressure higher than normal pressure by the main pump. In this pressure contact treatment tank, the dissolution of ozone is further promoted according to Henry's law, and the dissolved ozone decomposes and agglomerates the processed matter such as water-bloom contained in the water to be treated by its oxidizing action.

The ozone-dissolved treated water in the pressurized catalytic cracking tank is then sent to a normal pressure water-blowing separation tank, etc., and received inside the water-water separation tank. Then, ozone and oxygen in the ozone-dissolved treated water form fine bubbles to form an upward flow, which is carried on the upward flow and pushes the water-bloom etc. to the surface of the water. In the separation tank such as the water-bloom, because the upward flow of fine bubbles is continuously generated,
The water-blooms pushed up to the water surface are always collected near the water surface and do not sink to the bottom of the water-bloom separation tank.

[0012] The fresh water after the water-bloom and the like are decomposed and separated as described above is sent to the next tank from below the partition plate in the water-bloom and the like separation tank, for example, and then returned to the lake or the like through the return pipe.

By the apparatus of the present invention, the above-mentioned process is continuously repeated to remove most of the water-bloom and the like in lakes and marshes. In the treatment process, since the blue water etc. in the treated water is decomposed and killed by the oxidizing action of ozone,
In the fresh water returned to lakes and marshes through the return pipe, water-blooms and the like do not reoccur in a short period of time.

Further, according to the first aspect of the present invention, when the sub-pump is operated together with the main pump, the water to be treated sucked up by the sub-pump is removed from the pressurized catalytic cracking tank in the algal separation tank. Is discharged above the discharge position of the treated water. as a result,
The upward flow of fine bubbles of ozone and oxygen in the ozone-dissolved treated water sent from the pressurized catalytic cracking tank pushes up the water-bloom and the like contained in the treated water sent by the sub-pump. Then, in this process, the ozone in the ozone-dissolved treated water is mixed with the water-bloom or the like in the water to be treated sent by the sub-pump, and the water-bloom or the like is decomposed and aggregated by the ozone.

Here, the main pump feeds the water to be treated into the pressurized catalytic cracking tank at a pressure higher than normal pressure. Therefore, both the pump and the motor for operating the pump must have a large capacity. On the other hand, the sub-pump feeds the water to be treated into the separation tank such as blue-green algae under normal pressure. Therefore, a small capacity pump is sufficient.

As described above, by providing the sub-pump, the processable amount of water-bloom and the like per unit time of the entire apparatus for separating water-bloom and the like increases. In this case, the energy efficiency as a whole is better than that in the case where the main pump is made larger in capacity without providing the sub-pump to increase the processable amount per unit time, such as water-bloom. This is because the sub-pump only needs to have a small capacity.

Moreover, the water to be treated which is sucked by the sub-pump and discharged into the water-bloom separation tank is mixed with ozone rising as fine bubbles in the water-water separation tank. As a result, the quality of decomposition treatment of water-bloom, etc. will not deteriorate.

Next, according to the second aspect of the invention, the water to be treated sucked by the sub-pump is discharged toward the ejector.

Since the ejector is provided on the discharge side of the main pump, the inside of the ejector is made negative by the discharge pressure of the main pump. Therefore, the ejector sucks the water to be treated discharged from the sub-pump and assists the discharge action of the sub-pump. This means that even if the sub-pump has a small capacity, a relatively large amount of untreated water exceeding the capacity is sent to the discharge side of the main pump. Therefore, the main pump and the sub pump feed untreated water in an amount exceeding the simple total of their capacities into the pressurized catalytic cracking tank. That is, the energy efficiency in the separation process of water-bloom etc. is good.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 are fluid circuit diagrams showing an embodiment of a blue-green aqua separation device according to claims 1 and 2, respectively.

Since the Aoko etc. separating devices respectively shown in FIGS. 1 and 2 have the same basic constitution, first, the constitution common to them will be collectively explained. In both figures, the same components are designated by the same reference numerals.

A main pump 2 is installed near the shore of a lake 1 or the like contaminated with water-bloom or the like. Then, the main pump 2 sucks up contaminated lake water or the like (hereinafter referred to as “water to be treated”) that needs to be treated to remove a treated product such as a blue-green algae from the lake 1 or the like. Reference numeral 3 in the drawing is a water absorption pipe, and a strainer 4 for eliminating suction of dead branches and the like existing in the lake 1 is attached to the tip thereof.

An ozone generator 6 is connected to the suction side of the main pump 2, that is, in the middle of the water absorption pipe 3 via an ozone supply pipe 5 made of a Teflon tube. The ozone generator 6 has a well-known configuration in which ozone is generated by silently discharging oxygen.

Ozone generated by the ozone generator 6 flows only in the direction of the main pump 2 by a check valve 7 provided in the middle of the ozone supply pipe 5 as the main pump 2 absorbs water. , The ozone generator 6
It does not flow back in the direction of. Then, the ozone sucked in the direction of the main pump 2 along with the water absorption operation of the main pump 2 is atomized by the cavitation action of the main pump 2 and melts into the treated water sucked by the main pump 2 (in this way Hereinafter, the treated water in which ozone is dissolved is referred to as "ozone-dissolved treated water".

On the discharge side of the main pump 2, there is connected a pressure catalytic cracking tank 8 whose inside is kept at a pressure higher than atmospheric pressure and is kept in a pressurized state. Sent within 8. Generally, in a pressurized state, the gas is more efficiently dissolved into a liquid than under normal pressure,
The ozone is more fully dissolved in the treated water. Then, due to the oxidizing action of a large amount of ozone dissolved in the treated water, the water-bloom and the like contained in the treated water are decomposed and killed.

The pressure catalytic cracking tank 8 has a valve 9 in the middle thereof.
Is connected to a blue-green alga separation tank 11 via a transfer pipe 10 in which the ozone-dissolved treated water in the pressurized catalytic cracking tank 8 is transferred to the blue-green water separation tank 1 through the transfer pipe 10.
1 is sent.

The transfer pipe 10 is a separation tank 11 for the water-bloom etc.
Is introduced to the lower side of the above, and extends over the lower part inside the separation tank 11 for water-bloom and the like. The tip of the transfer pipe 10 is closed. A large number of holes are formed in the tubular body of the transfer tube 10 in the water-blowing separation tank 11 so as to be aligned in the axial direction. These holes are used to separate the ozone-dissolved treated water sent from the pressure catalytic cracking tank 8 into a water tank 11 for separating water etc.
It is the ozone-dissolved treated water discharge hole 12 for discharging into the inside.

Here, the internal pressure in the water-blowing separation tank 11 is in a normal pressure state equal to the atmospheric pressure. Therefore,
When the ozone-dissolved treated water is discharged from the ozone-dissolved treated-water release hole 12 into the water-bloom separation tank 11, the ozone dissolved in the treated water in the pressurized catalytic decomposition tank 8 under a pressurized environment. Oxygen precipitates, forming fine bubbles and rising in the treated water. The upward flow of bubbles such as ozone is continuously generated with the continuous supply of the ozone-dissolved treated water from the pressure catalytic decomposition tank 8, and the upward flow of ozone existing in the treated water causes Treated substances such as blue-green algae that have been decomposed and killed by the oxidizing action are pushed up toward the water surface. Since the upward flow of bubbles such as ozone is continuous, the pushed water-bloom and the like are always present near the water surface, and hardly settle in the lower part inside the water-bloom and so forth separation tank 11. Therefore, only fresh water that does not contain water-bloom or the like exists in the lower part inside the water-bloom-separation tank 11.

At the upper part inside the water-bloom separation tank 11, there is provided a water-bloom scraping device 13 for scraping the water-bloom etc. pushed up to the water surface and accumulated near the water surface as described above.

In the embodiment shown in the drawings, the water-blooming scraping device 13 includes a water-blooming scraping plate 14 that reciprocates back and forth across the water surface of the water stored in the water-blowing separation tank 11, and the water-blooming scraping plate 14. And an operating rod 15 for reciprocally moving the scraping plate 14 such as the blue-white back and forth. Then, the operating rod 15 is manually operated every predetermined time to scrape away the water-bloom or the like, or the operating rod 15 is linked to a motor (not shown) and appropriately actuated by a timer.

The water-bloom and the like near the water surface scraped by the water-bloom and the like scraping device 13 are separated from the water-bloom and the like separation tank 1.
It drops from the edge of No. 1 and is taken out from a water-bloom discharging unit 16 provided adjacent to the water-bloom separating tank 11.

It is possible to manually scoop off the water-bloom or the like from above the water-bloom or the like separation tank 11 without using the above-described water-blowing or the like scraping device 13, but in this case, the scooping work is performed. Dozens of minutes before the ozone generator 6
If the operation of is stopped so that the water-bloom and the like are pushed up to the water surface only by the upward flow of the fine bubbles of oxygen, there is no fear that ozone will adversely affect workers who perform the scooping work.

A partition plate 17 for partitioning the water-bloom separation tank 11 into right and left is provided in the water-bloom separation tank 11, and the water-water separation tank 11 is partitioned by the partition plate 17 to form a fresh water reservoir 11a. To be done. The partition plate 17 is
The lower end portion 17a does not reach the bottom surface of the water-bloom etc. separation tank 11, and as a result, the water-bloom etc. separation tank 11 and the fresh water reservoir 11a communicate with each other through a communication portion 19 formed on the lower side. ing.

As described above, the fresh water obtained by separating the water-bloom and the like is accumulated in the lower side of the water-bloom and the like separation tank 11, and therefore the fresh water reservoir 11a is passed through the communicating portion 19.
Pour into. A fresh water take-out tank 20 is provided adjacent to the side of the fresh water reservoir 11a. This fresh water take-out tank 2
Fresh water overflows from the fresh water reservoir 11a, which has become full, into 0.

The blue-green alga separation tank 11 and the fresh water take-out tank 20 are both covered with a common lid 21 and isolated from the atmosphere. This is because if a large amount of ozone leaks out of the water vapor separation tank 11 or the like for a long period of time, it will lead to environmental damage. Then, the inside of the separation tank 11 such as the water-bloom and the like is communicated with the outside air through an appropriate decomposition catalyst device 22 provided penetrating the lid 21, and after the decomposition catalyst device 22 decomposes ozone into oxygen. It is designed to be released into the atmosphere.

A return pipe 23 for returning the fresh water in the fresh water take-out tank 20 to the lake 1 is connected to the lower portion of the fresh water take-out tank 20. The activated carbon tank 2 is provided in the middle of the return pipe 23.
4 are provided. This is in consideration of the case where ozone content remains in the fresh water, and the safety is improved by returning the fresh water to the lake or the like 1 after decomposing the fresh water into oxygen through the activated carbon tank 24. .

When it is desired to return a minute amount of ozone to the lake 1 etc., the bypass valve 26 of the bypass pipe provided so as to bypass the activated carbon tank 24 may be opened slightly. By doing so, fresh water containing only a small amount of ozone is returned to lakes and marshes, and the oxidizing effect of this ozone also has a sterilizing effect on E. coli and general bacteria in lakes and marshes, allowing them to grow in lakes and marshes. It can also contribute to the prevention of fish diseases.

Next, to describe the structure peculiar to the water-bloom separation device shown in FIG. 1, a sub-pump 27 is provided near the lake shore of the lake 1 or the like. This sub pump 27 is
It has a smaller capacity than the main pump 2.

Then, the sub-pump 27 sucks the water to be treated from the inside of the lake 1 etc. through a route different from that of the main pump 2. Reference numeral 28 in the drawing is a water absorption pipe, and a strainer 29 for preventing suction of dead branches existing in the lake 1 is attached to the tip of the pipe.

A discharge pipe 3 is provided on the discharge side of the sub-pump 27.
0 is connected. The discharge pipe 30 is introduced into the algal separation tank 11 and extends horizontally in the tank 11. The tip of the discharge pipe 30 is closed.

The discharge pipe 30 is the separation tank 1 for the water-bloom etc.
It is located slightly above the transfer pipe 10 in the inside of 1, and extends parallel to the transfer pipe 10. And
A large number of holes 31 are formed in the cylindrical body of the discharge pipe 30 in the water-blowing separation tank 11 side by side in the axial direction. These holes 31 are discharge holes for the water to be treated that is pumped by the sub-pump 27.

In the above structure, when the sub-pump 27 is operated simultaneously with the main pump 2, the treated water is discharged from the treated water discharge hole 31 through the discharge pipe 30 into the algal bloom separation tank 11. To be done. The discharged water to be treated contains water-bloom and the like.

Here, the ozone-dissolved treated water discharged from the pressurized catalytic cracking tank 8 is discharged from the ozone-dissolved treated water discharge hole 12 of the transfer pipe 10. The ozone-dissolved treated water contains fine bubbles of ozone and oxygen. Therefore, the upward flow of these fine bubbles pushes up the water-bloom and the like contained in the water to be treated sent by the sub-pump 27 upward. At the same time, the ozone in the ozone-dissolved treated water is mixed with the water-bloom etc. in the treated water sent by the sub-pump 27,
The water-bloom and the like are decomposed and aggregated by the ozone.

The main pump 2 is for pumping water to be treated to the pressurized catalytic cracking tank at a pressure higher than normal pressure. Therefore, both the main pump 2 and the motor (not shown) for operating the pump 2 must have a large capacity. On the other hand, the sub-pump 27 feeds the water to be treated into the water-separation tank 11 of atmospheric pressure. Therefore, a small capacity is sufficient.

As described above, by providing the sub-pump 27 as shown in FIG. 1, as compared with the case where only the main pump 2 is used, the processing amount of water-bloom etc. per unit time of the whole water-bloom separation device is increased. Will increase. In this case, the main pump 2 is provided without providing the sub pump 27.
Is more energy efficient as a whole, as compared with the case where a large capacity is used to increase the processable amount per unit time such as blue-green algae. This is because the sub pump 27 need only have a small capacity.

Incidentally, the main pump 2 is 3.7K.
If you try to double the water intake of a water-blowing separator that uses a W pump, do not install the sub-pump 27,
If you try to deal with it only by increasing the size of the main pump 2, 2
It is necessary to replace the main pump with double the capacity. On the other hand, if the sub-pump 27 is used as shown in FIG. 1, the sub-pump 27 having the capacity of 0.4 KW is additionally added to the main pump 2 of 3.7 KW, and the doubling of the intake amount similar to the above can be achieved. It was realized.

Moreover, the water to be treated which is sucked by the sub-pump 27 and discharged into the water-bloom separation tank 11 mixes with ozone rising as fine bubbles in the water-water separation tank 11, so that water The quality of the decomposition treatment of water-bloom etc. in the entire separation device does not deteriorate.

Next, the structure peculiar to the water-bloom separation device shown in FIG. 2 will be described.

A sub-pump 35 is provided near the shore of the lake 1 or the like. The sub-pump 35 has a smaller capacity than the main pump 2.

Then, the sub-pump 35 sucks the water to be treated from the inside of the lake 1 etc. through a route different from that of the main pump 2. Reference numeral 36 in the drawing is a water absorption pipe, and a strainer 37 for preventing suction of dead branches and the like existing in the lake 1 is attached to the tip thereof.

A discharge pipe 3 is provided on the discharge side of the sub-pump 35.
8 is connected. The discharge pipe 38 is connected to the ejector 39. The ejector 39 is provided in the middle of the pipe connecting the discharge port of the main pump 2 and the pressurized catalytic cracking tank 8.

The ejector 39 has a negative pressure inside due to the discharge action of the main pump 2. Then, by the negative pressure inside the ejector 39, the ejector 39 acts so as to suck in the water to be treated which is sucked up and discharged by the sub-pump 35.
Therefore, the sub-pump 35 is connected to the ejector 3
The suction and discharge actions are assisted by 9 and it is possible to perform an amount of work exceeding its own capability. Therefore, the main pump 2 and the sub pump 35 send untreated water in an amount exceeding the simple sum of their capacities to the pressurized catalytic cracking tank 8. That is, as in the case shown in FIG. 1, the energy efficiency in the blue-green alga separation processing is good.

[0053]

EFFECTS OF THE INVENTION According to the present invention, water-blooms and the like in lakes and marshes can be continuously removed. Therefore, unlike the conventional batch processing method, the water-blooms and the like can be efficiently separated. Moreover, due to the oxidizing action of ozone, the water-blooms and the like do not survive in the fresh water returned to the lakes and marshes after the treatment, so that the re-generation of water-blooms and the like in the lakes and marshes can be delayed.

Further, there are effects such as good energy efficiency.

[Brief description of drawings]

FIG. 1 is a fluid circuit diagram showing an embodiment of the invention according to claim 1.

FIG. 2 is a fluid circuit diagram showing an embodiment of the invention according to claim 2;

[Explanation of symbols]

 1 Lakes, etc. 2 Main pump 6 Ozone generator 8 Pressurized catalytic cracking tank 11 Separation tank for water-bloom 23 Return pipe 37, 35 Sub-pump 39 Ejector

Claims (2)

[Claims] 1. A main pump (2) which sucks up water to be treated containing water-bloom etc. from a lake (1) and is connected to an ozone generator (6) on the suction side, and a main pump (2) of this main pump (2). A pressure catalytic cracking tank (8) connected to the discharge side and having an internal pressure higher than atmospheric pressure, and a pressure catalytic cracking tank (8) connected to the pressure catalytic cracking tank below the inside. (8) A water-separating separation tank (11) from which the treated water from (8) is discharged, and the pressurized catalytic decomposition tank in the water-sealing separation tank (11) that sucks up the treated water from the lake (1) The sub-pump (27) that discharges the treated water above the position where the treated water is discharged from (8) and the fresh water after separating the water-bloom etc. in the lower part of the separation tank (11) for the water-bloom etc. And a return pipe (23) for returning to the same. Separator such as water-bloom. 2. A main pump (2) which sucks up water to be treated containing water-bloom etc. from a lake (1) and is connected to an ozone generator (6) on the suction side, and a main pump (2) of this main pump (2). Installed on the discharge side of the main pump (2), which is connected to the discharge side and sucks the water to be treated from the pressurized catalytic cracking tank (8) whose inside pressure is higher than normal pressure and the lake and marshes (1). The ejector (39) is connected to a sub-pump (35) that discharges the water to be treated, and the pressure catalytic cracking tank (8), and the inside of the lower side of the pressure catalytic cracking tank (8) is connected to the pressure pump. A water-blowing separation tank (11) from which treated water is discharged, and a return pipe (23) for returning the clean water after the water-blowing separation at the lower part of the water-blowing separation tank (11) to the lake or the like. Separation device for water-bloom etc.