JPH06278681A - Raw water treatment device - Google Patents

Abstract

PURPOSE:To introduce raw water into a sedimentation part properly according to increase in size of adhesive carriers by flowing raw water such as bilge water of ship containing microorganisms and oil content and mixing it with water containing granular adhesive carriers to purify the water by its fluidization and sedimentation. CONSTITUTION:In a raw water treatment device, raw water from a raw water flow-in part 4 is mixed with water containing adhesive carriers (f) in a container 1, and the mixed fluid raised along an air lift part together with air injected from an air tube 2 is lowered at a flow part A. A sedimentation part B connected to the flow part A through a connecting port 5a is separated from the flow part A by a partition 5, and the partition 5 is raised and lowered by lifting mechanisms 9 to 11 for the partition 5 to adjust the opening of the connecting port 5a. When the adhesive carriers (f) become large, the connecting port 5a is increased in diameter to reduce the flowing velocity of it, thus separating the adhesive carriers (f) from each other. When they are oscillated, the connecting port 5a is reduced in diameter to suppress the oscillation of the carriers in the flow part A from being[propagated to the sedimentation part B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for purifying raw water having pollutant components such as bilge water of ships and oil-containing wastewater on land (especially wastewater containing emulsified oil).

[0002]

2. Description of the Related Art A conventional cylindrical fluidized bed type biological treatment apparatus shown in FIG. 5 will be described. Inside a container 1 as a fluidized bed apparatus main body, an adhering carrier f as particles for adhering microorganisms and the like is included. The water is full. Then, raw water c containing microorganisms and other pollutant components flows into the container 1 through the raw water inflow pipe 4. The inside of the container 1 is divided by a partition plate 5, whereby a fluidized portion A and a sedimented portion B which are in communication with each other are formed in the lower portion.

Further, in the flow section A of the container 1, a cylindrical tube 3a is provided.
The air lift portion 3 formed in 1 and the air pipe 2 arranged below the air lift portion 3 are provided, and the air a blown up from the air pipe 2 is guided upward by the air lift portion 3. Then, due to the driving force generated when the air a rises in the air lift unit 3, the mixed liquid b and the adhering carrier f of the flow unit A rise, and when they reach the water surface, they flow downward so that they flow. The inside is mixed. During that time, oxygen in the air a is dissolved in the mixed liquid b. On the other hand, the raw water c flows through the raw water inflow pipe 4 and is mixed with the raw water c while decomposing and removing the pollutant components (organic substances and oil components) contained therein.

Most of the mixed liquid b in the flow section A is circulated and mixed in this way, but a part thereof flows into the precipitation section B. The settling section B is partitioned by the partition plate 5 from the fluidized section A, but since the lower part thereof communicates, a part of the separated liquid d in the fluidized section A rises up in the settling section B and eventually reaches the water surface. After reaching and overflowing from the overflow weir 6 to form the treated water e in the treated water trough 7, the treated water e is combined and then discharged through the treated water pipe 8. When the adhering carrier f mixed with the separation liquid d rises in the precipitation part B, the adhesion carrier f as particles having a larger specific gravity than water settles in the lower part of the precipitation part B and separates from the separation liquid d.

FIG. 6 shows the structure of a conventional prismatic fluidized bed type biological treatment apparatus. Its structure is in principle the same as that of the cylindrical type shown in FIG. 5, but the main differences are as follows.
That is, the air lift portion 3 in FIG. 5 corresponds to the air lift portion 3 ′ surrounded by the fluidized bed body 1 and the air lift plate 3′a in FIG. Further, the overflow weir 6 in FIG. 5 is arranged concentrically with the cylindrical container 1, but in FIG.
Are disposed only on the portion opposite to the air lift portion 3 '.

[0006]

When the above-mentioned conventional apparatus is used for treating bilge water of a ship, there are the following problems. (1) In the conventional device, the partition plate 5 is fixed. However, as the bilge water is biologically treated, the adhering carrier f as particles is enlarged and the particle size is increased, and the adhering carrier f is laminated at the communication part between the fluidized section A and the settling section B to cause a phenomenon of clogging. . Further, there is a problem that the concentration of the adhered carrier f in the fluidized section A is reduced and the processing performance is not stable. (2) When mounted on a ship, the adhered carrier f in the sedimentation part B is rolled up due to the vertical swing of the ship during navigation. Therefore, the water d and the adhesive carrier f are not completely separated in the settling section B, and in the worst case, the adhesive carrier f leaks into the treated water e together with the water d.

[0007]

The raw water treatment apparatus of the present invention comprises a container filled with water containing an adherent carrier as particles for adhering microorganisms and the like, and a raw water inflow section for introducing raw water into the container. An air pipe arranged to blow air upward in the bottom of the container, an air lift portion that guides the air ejected from the air pipe upward, and an internal liquid from the top of the air lift portion to the bottom of the container. The fluidizing part to be fluidized, the sedimentation part which is arranged adjacent to the fluidizing part so that the fluidizing part is separated from the fluidizing part by the partition plate and communicates with the fluidizing part at the communication port below the partition plate. With an overflow weir formed on the upper edge of the wall of the container at the upper part of the portion, in order to adjust the opening area of the communication port regulated by the level of the lower end of the partition plate in the bottom of the container, A special feature is that the partition plate lifting mechanism is provided. It is set to.

[0008]

The raw water treatment apparatus of the present invention described above has the following actions. (1) The partition plate between the fluidizing section and the sedimentation section is moved up and down to adjust the communication port between the fluidizing section and the sedimentation section to a desired opening area. (2) At the beginning of introducing raw water such as bilge water, the opening area of the communication port was made small, and the opening area of the communication port was increased as the biological treatment progressed and the adhering carrier enlarged and the particle size increased. Set. As a result, the speed at which water passes through the communication port decreases, and the adhering carriers are dispersed. (3) When this device is mounted on a hull or the like and causes rocking, the rocking of the mixed liquid in the flow part and the adherent carrier propagates into the sedimentation part to reduce the influence by reducing the opening area of the communication port. The effect is small.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A raw water treatment apparatus as a first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view thereof, FIG. 2 is a plan view thereof, and the apparatus is a cylindrical fluidized bed. The fluidized portion A, the sedimentation portion B, the air pipe a, the mixed liquid b, the raw water c, the separated liquid d, the treated water e and the adhering carrier f shown in FIGS. Are almost the same as those indicated by the same reference numerals. That is, a raw water inflow pipe 4 as a raw water inflow part is connected to a container 1 filled with water containing an adherent carrier f as particles for adhering microorganisms and the like. An air lift portion 3 formed by an air pipe 2 arranged to blow up the air and a cylindrical pipe 3a for guiding the air from the air pipe 2 upward is provided.

Then, the internal liquid containing the raw water, which is guided upward from the lower end of the air lift portion 3 through the inside of the cylindrical pipe 3a by the air, flows from the upper portion of the air lift portion 3 to the bottom portion of the container 1, The flow section A is formed, and the settling section B which is partitioned from the flow section A by the partition plate 5 and communicates with the flow section A at the communication port 5a below the partition plate 5.
Is disposed adjacent to the flow section A. Further, an overflow weir 6 formed on the upper edge of the wall portion of the container 1 is provided above the precipitation portion B. Further, in the present invention, a lifting mechanism for the partition plate 5 is provided so that the opening area of the communication port 5a regulated by the level of the lower end of the partition plate 5 in the bottom of the container 1 can be adjusted.

That is, the partition plate 5 is used as the lifting mechanism.
A rack type shaft 10 for suspending and a connection fitting 9 fixed to the partition plate 5 is provided, and a rack type drive unit 11 for vertically moving the rack type shaft 10 is provided. In this embodiment, the communication port 5a is formed between the lower end of the partition plate 5 and the inclined wall 1a of the container 1. However, instead of the inclined wall 1a, a shelf plate-shaped member is used for the container. It may be provided so as to project from the inner wall of No. 1 and may be formed so that the opening area of the communication port 5a is increased or decreased by the required elevation of the partition plate 5.

When the partition plate 5 is moved in the vertical direction, the rack type driving unit 11 is rotated to move the rack type shaft 10 upward or downward. Then, the movement of the rack shaft 10 is transmitted to the partition plate 5 via the connection fitting 9, and the partition plate 5 moves upward or downward.
It should be noted that the drive unit 11 can be implemented either manually or electrically. A part of the separated liquid d in the fluidized section A is
After reaching the water surface while rising, the water overflows from the overflow weir 6 and becomes the treated water e in the treated water trough 7 and joins, and then is discharged through the treated water pipe 8. When the adhering carrier f mixed with the separation liquid d rises in the precipitation part B, the adhesion carrier f as particles having a larger specific gravity than water settles in the lower part of the precipitation part B and separates from the separation liquid d.

Since the raw water treatment apparatus of this embodiment is constructed as described above, the partition plate 5 between the fluidizing section A and the sedimenting section B is vertically moved to adjust the fluidizing section A and the sedimentation section B. The opening area of the communication port 5a is set to a required opening area, but at the beginning of introducing raw water such as bilge water, the partition plate 5 is lowered to reduce the opening area of the communication port 5a. Then, as the biological treatment progresses and the adherent carrier f is enlarged and the particle size is increased,
By raising the partition plate 5, the opening area of the communication port 5a is set large. When the opening area is increased in this way, the communication port 5
The passing speed of water in a decreases and the adhering carriers f are dispersed. Further, when this device is mounted on a hull and used for treatment of engine room bilge water, by reducing the opening area of the communication port 5a when the hull sways,
It is possible to suppress the oscillation of the mixed liquid b and the adhering carrier f in the fluidized portion A from propagating into the sedimented portion B.

When using this apparatus, when starting the biocompatibility and continuing the normal operation, the communication port 5
The opening area of a is set so that the water passing speed is 2 m / h or less. Further, as the adhering carrier f is enlarged, the partition plate 5 is moved downward so that the opening area of the communication port 5a is set such that the water passage speed is 1 m / h or less. When the device starts rocking due to the motion of the hull,
The opening area of the communication port 5a is set so that the water passage speed is 0.5 m / h or less.

Next, a second embodiment of the present invention is shown in FIG. 3 (longitudinal sectional view) and FIG. 4 (plan view). The second embodiment is configured as a prismatic fluidized bed type biological treatment means, and the basic structure is the same as that of the cylindrical type of FIGS. 1 and 2, but the main differences are as follows. That is, the air lift portion 3 of FIG.
Corresponds to the air lift portion 3 ′ surrounded by the wall portion of the container 1 as the fluidized bed body and the air lift plate 3′a in FIG.
Further, the overflow weir 6 in FIG. 1 is arranged concentrically with the cylindrical container 1, but in FIG. 3 the overflow weir 6 is arranged only in a portion opposite to the air lift portion 3 ′. The means for setting the opening area of the communication port 5a is constructed as the lifting mechanisms 10 and 11 for the partition plate 5 in substantially the same manner as in the first embodiment. Also in the case of the second embodiment, it is possible to obtain the same effects as those of the first embodiment.

[0016]

As described in detail above, according to the raw water treatment apparatus of the present invention, the following effects can be obtained. (1) Since the partition plate 5 between the flow section A and the settling section B is configured to be able to move up and down, and the opening area of the communication port 5a between the flow section A and the settling section B can be freely set. It can be used as a fluidized bed type biological treatment means for treating bilge water and the like. (2) By widening the opening area of the communication port 5a to reduce the passage speed of water through the communication port, it is possible to suppress a phenomenon in which the enlarged adherent carriers f are stacked. As a result, the concentration of the adhered carrier f in the fluidized portion A becomes almost constant,
The effect of stabilizing the processing performance can be obtained. (3) The communication port 5 is
By reducing the opening area of a, it is possible to suppress the swing of the adhering carrier f in the fluidized portion A from propagating into the sedimented portion B.

Further, in this case, the enlarged adhering carrier f also has the effect of being dispersed in the vicinity of the communication port 5a due to the rocking of the mixed liquid in the flow section A. This can prevent the adhering carrier f in the fluidized section A from flowing into the treated water e, and a stable treated water quality can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a raw water treatment apparatus as a first embodiment of the present invention.

FIG. 2 is a plan view of the raw water treatment device of FIG.

FIG. 3 is a vertical sectional view of a raw water treatment device as a second embodiment of the present invention.

FIG. 4 is a plan view of the raw water treatment device of FIG.

FIG. 5 is a vertical sectional view showing an example of a conventional raw water treatment device.

FIG. 6 is a vertical sectional view showing another example of a conventional raw water treatment device.

[Explanation of symbols]

 1 Container 1a Inclined wall 2 Air pipe 3,3 'Airlift part 3a Cylindrical pipe 3'a Airlift plate 4 Raw water inflow pipe 5 Partition plate 6 Overflow weir 7 Treated water trough 8 Rack type shaft 10 Rack type drive part A Flowing part B Precipitating part a Air b Mixed liquid c Raw water d Separated liquid e Treated water f Adhesive carrier

Front Page Continuation (72) Inventor Yoshiaki Okawa 5-16 Komatsudori, Hyogo-ku, Kobe Inside Shinryo High-Tech Co., Ltd.

Claims (1)

[Claims] 1. A container filled with water containing an adherent carrier as particles for adhering microorganisms and the like, a raw water inflow part for allowing raw water to flow into the container, and air blown upward in the bottom part of the container. An air pipe arranged, an air lift part for guiding the air ejected from the air pipe upward, a flow part for flowing the internal liquid from the upper part of the air lift part to the bottom part of the container, and a partition plate from the flow part. While being partitioned by the partition plate, a settling section disposed adjacent to the fluidizing section so as to communicate with the fluidizing section at the lower communication port of the partitioning plate, and on the upper edge of the wall of the container above the settling section. A lifting mechanism for the partition plate is provided in order to adjust the opening area of the communication port, which is provided with an overflow weir and is regulated by the level of the lower end of the partition plate in the bottom of the container. Characteristic raw water treatment equipment.