JP2008049236A - Floatation separation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floatation separation apparatus which can effectively utilize an installation space and is significantly easy of installation when installing the floatation separation apparatus including a tank body, a flocculation reactor, a pressurized water production device, a chemical liquid tank, a distribution board, a control board, or the like. <P>SOLUTION: The apparatus comprises containing the pressurized water production device installed on a support in a space below the tank body having a downward leg and introducing the pressurized water produced by the pressurized water production device upward into the tank body adjacent to the top part. Further, any one or more of the chemical liquid tank, a chemical dosing pump, the distribution board or the control board are contained in a space below the tank body held by the leg. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an apparatus for subjecting SS and oil to pressurized flotation separation from water containing suspended solids (SS) and oil.

  Japanese Patent Publication No. 7-38984 discloses a pressurized flotation separation apparatus in which a tank body is partitioned by a partition to form a mixing chamber and a flotation separation chamber. FIG. 6 is a longitudinal sectional view showing the tank described in FIG. 1 of the publication.

  The inside of the tank body 81 is divided into a mixing chamber 82 and a floating separation chamber 84 by a partition wall 83. Drainage is introduced downward into the mixing chamber 82 via a drainage introduction pipe 85 protruding from the mixing chamber wall surface 82 a opposite to the partition wall 83.

The pressurized water in which the air is dissolved is supplied into the mixing chamber 82 from the pressurized water pipe 88 in the horizontal direction. The pressurized water pipe 88 is provided below the drainage introduction pipe 85. The drainage flows downward and in a curtain shape from the drainage introduction pipe 85, flows downward along the side surface 82a of the mixing chamber 82, and pressurized water is added from the pressurized water pipe 88 along the way, and merges. The combined water flows in a direction away from the mixing chamber wall surface 82 a, then rises along the partition wall 83, and circulates in the mixing chamber 82. A part of the water in the course of circulation flows out to the floating separation chamber 84 so as to get over the upper end of the partition wall 83 and is subjected to the floating separation process. The sludge that has been levitated and separated is scraped out by the scraper 90 to the scraper receiver 91 and discharged.
Japanese Patent Publication No. 7-38984

  When installing the above-described conventional pressurized levitation separator, the tanks (mixing tank and levitation tank), agglomeration reaction tank, pressurized water production apparatus, chemical tank, switchboard, and control panel, etc. that constitute the pressurized levitation separator They were installed separately on a flat surface. Therefore, it is necessary to fix them individually at the installation location, and the installation space is occupied very much, and the pressurized water piping connecting the tank body and the pressurized water producing apparatus to each other becomes long, so that installation takes much time.

  An object of the present invention is to provide a pressurized flotation separation apparatus that solves the above-described problems, can effectively use an installation space, and is very easy to install.

  The pressurized flotation separation apparatus according to claim 1 is a pressurized flotation separation apparatus for flotation separation of water to be treated. The pressure flotation separation apparatus includes a tank body having a downward leg, and is a space below the tank body held by the leg. Further, the pressurized water production apparatus installed on the gantry is stored, and the pressurized water introduction port for introducing the pressurized water produced by the pressurized water production apparatus into the tank body is provided at the bottom of the tank body.

  According to a second aspect of the present invention, the tank body is divided into a mixing chamber and a floating separation chamber by a partition, and the water to be treated is introduced into the mixing chamber. The partition wall rises from the bottom surface of the tank body, and the upper end of the partition wall is positioned lower than the water surface level of the tank body, so that water flows out to the mixing chamber through the upper side of the partition wall. The pressurized water inlet is provided at the bottom of the mixing chamber.

 The pressurized floating separation apparatus according to claim 3 is the pressure floating separation apparatus according to claim 1 or 2, wherein the tank body is partitioned by a partition wall and a partition wall so that an agglomeration reaction chamber, a mixing chamber, and a floating separation chamber are installed in this order. The partition wall is disposed between the agglomeration reaction chamber and the mixing chamber, the partition wall is disposed between the mixing chamber and the floating separation chamber, and the mixing wall from the aggregation reaction chamber is disposed below the partition wall. An outlet for allowing the agglomerated reaction water to flow out is provided in the chamber, and the partition rises from the bottom surface of the tank body, and its upper end is positioned lower than the water surface level of the tank body. Water flows out into the mixing chamber through the upper side of the mixing chamber, and the pressurized water inlet is provided at the bottom of the mixing chamber.

 According to a fourth aspect of the present invention, there is provided the pressurized flotation separation apparatus according to any one of the first to third aspects, wherein the liquid tank, the chemical injection pump, the switchboard or the control panel installed on the gantry in the space below the tank body held by the legs. A pressurized flotation separation apparatus characterized by storing at least one of them.

 According to a fifth aspect of the present invention, there is provided the pressurized floating separation apparatus according to the fourth aspect, wherein a part of the chemical solution tank is provided in a space below the tank body held by the legs, and the chemical solution is supplied to the chemical injection tank. The replenishing port is provided so as to protrude outside the space below the floating tank.

  According to the pressurized levitation separation apparatus of the present invention, the pressurized water production apparatus installed on the gantry is stored in the space under the tank body having the downward legs, and the pressurized water produced by the pressurized water production apparatus is brought close to the upper part. Since it is configured to be introduced upward into the tank body, a narrow space can be effectively utilized. In addition, since the pressurized water production apparatus and the tank body are provided close to each other, the pressurized water pipe that connects the tank body and the pressurized water production apparatus to each other is shortened, the piping cost can be reduced, and the connection is very easy.

  In the present invention, the tank body is preferably divided into a mixing chamber and a floating separation chamber by a partition wall whose upper end is positioned lower than the water surface level of the tank body. Provided at the bottom of the chamber, pressurized water is introduced upward into the mixing chamber. In the mixing chamber, a large circulating flow is generated by the pressurized water, and the flocs in the water to be treated and the fine bubbles by the pressurized water effectively come into contact with each other so that the bubbles are sufficiently attached to the flocs. The floc to which the bubbles are attached is supplied to the floating separation chamber, and is efficiently floated and separated in the floating separation chamber.

  Moreover, it is preferable that the said tank body is divided into an agglomeration reaction chamber, a mixing chamber, and a floating separation chamber by a partition wall and a partition. The flocculant and alkali agent added to the agglomeration reaction chamber are introduced from the chemical liquid tank using a chemical liquid pump. The chemical liquid tank and the chemical liquid pump are close to the agglomeration reaction chamber in the space under the tank body having a downward leg. When installed, the installation space can be reduced, the chemical solution pipe connecting the agglutination reaction chamber and the chemical solution pump can be shortened, the piping cost can be reduced, and the connection becomes very easy.

  When the chemical tank is installed in the space below the tank body, if the replenishment port for replenishing the chemical liquid to the chemical tank is provided so as to protrude outside the space below the floating tank, the tank body will be obstructed. The flocculant and the alkali agent can be easily replenished without any trouble.

  In addition, a switchboard and control panel for moving a pressurized water production device, agitation tank for agglomeration reaction tank, a chemical injection pump for agglomerating agent and alkaline agent, a scum skimmer, etc. are installed in a space below the tank body. Can be used effectively.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is an elevational view of a pressure levitation separator according to an embodiment.

  The substantially rectangular tank body 3 has a plurality of downward legs 34. The length of the downward leg 34 is usually about 50 to 120 cm. A pressurized water production apparatus 22 installed on a gantry 32 is stored in a space below the tank body 3 held by the downward legs 34. The gantry 32 may be connected to the upper tank body by welding or the like, or may be provided independently. A switchboard and a control panel 36 are stored in a space below the tank body 3.

  2 and 3 are views showing a pressurized flotation separation apparatus in the same embodiment as FIG. 1, FIG. 2 is a longitudinal sectional view in the longitudinal direction, and FIG. 3 shows a configuration in the vicinity of the partition wall. It is a cross-sectional perspective view.

  The inside of the tank body 3 having a substantially rectangular shape in plan view is partitioned by the partition wall 1 and the partition wall 2, whereby the agglomeration reaction chamber 10, the mixing chamber 20, and the floating separation chamber 30 are formed in this order. The chambers 10, 20, and 30 are arranged in the longitudinal direction of the tank body 3, and the partition wall 1 and the partition wall 2 are extended in the short direction, that is, the width direction of the tank body 3.

  An outlet 16 for communicating the chambers 10 and 20 is formed in the lower part of the partition wall 1. The upper end of the partition wall 1 extends upward from the water surface of the tank body 3.

  The partition wall 2 is erected from the bottom surface 3 b of the tank body, and the upper end thereof is lower than the water surface of the tank body 3.

  Each wall 1, 2 is connected to both side surfaces 3a of the tank body.

  Raw water is introduced into the agglomeration reaction chamber 10 via a raw water pipe 11, and a flocculant such as PAC and an alkali agent can be supplied via the supply pipes 12 and 13. A pH meter 14 for detecting the pH of water in the agglomeration reaction chamber 10 is installed, and an alkaline agent injection pump (not shown) is operated so that the detected value of the pH meter 14 falls within a predetermined range.

  The aggregating agent is added in a predetermined amount by an aggregating agent injection pump (not shown). The water in the agglomeration reaction chamber 10 is gently agitated by the agitator 15 and agglomerated.

  The agglomerated water flows into the mixing chamber 20 through the outlet 16 and flows along the tank bottom surface 3b in the vicinity of the center in the width direction of the mixing chamber 20. In the tank bottom surface 3b, a nozzle 23 for discharging pressurized water is provided in the center in the width direction and relatively close to the partition wall 2. The tip of the nozzle 23 slightly protrudes from the tank bottom surface 3b, but is not limited to this, and the shorter the protrusion, the better.

  In this embodiment, water is taken out from the lower part of the floating separation chamber 30 through the pipe 21, and the pressurized water production apparatus 22 is pressurized and dissolved, and this pressurized water is supplied to the nozzle 23. Here, although the water for pressurized water is taken out from the lower part in the levitation separation chamber 30, the working water and the clean water from the pipe 35 may be taken out and used, and there is no particular limitation.

  In this embodiment, the nozzle 23 is disposed in a vertically lower region of an inclined partition upper portion 2b described later. In this embodiment, only one nozzle 23 is provided at the center of the tank bottom surface 3b in the width direction.

  The agglomerated water from the outlet 16 and the pressurized water from the nozzle 23 rise mainly along the vicinity of the center in the width direction of the partition wall 2 while being mixed. The partition wall 2 is a vertical part 2a that is substantially vertical (preferably within ± 10 ° with respect to the vertical surface) except for the upper part 2b, and the upper part 2b is inclined toward the partition wall 1 side.

  The upward flow flows substantially vertically upward along the vertical portion 2 a of the partition wall 2. Next, the upward flow is guided by the inclined partition upper part 2 b to change the flow direction toward the partition wall 1, and becomes a downward flow that descends along the partition wall 1 when reaching the vicinity of the partition wall 1. The downward flow that has flowed to the lower part of the partition wall 1 flows toward the partition wall 2 on the bottom surface 3 b of the tank body while merging with the agglomerated water from the outlet 16. In this way, a vertical circulation flow is formed in the mixing chamber 2 as shown in FIG. During the circulation, fine bubbles generated from the pressurized water adhere to the aggregated floc.

  As a result, the floc to which bubbles are sufficiently attached is supplied to the floating separation chamber 30 and the floc is efficiently levitated and separated.

  The floated flock is taken out by a scraper 31 such as a skimmer or a scraper and discharged through a discharge pipe 33.

  The clean water is extracted from the treated water outlet 35 from the lower part of the floating separation chamber 30.

  FIG. 4 is a top view of the pressurized flotation separation apparatus of the above embodiment. In the space below the tank body 3 held by the downward legs 34, in parallel with the pressurized water production apparatus 22, a coagulant chemical tank 37 for storing the coagulant added to the coagulation reaction tank 10, an alkaline chemical solution A tank 38 and respective chemical pumps (not shown) are stored. In this embodiment, each of the chemical replenishing ports of the flocculant chemical liquid tank 37 a and the alkaline chemical liquid tank 38 a is installed so as to protrude from the space below the tank body 3 held by the downward legs 34. The chemical liquid tank 37 for the coagulant and the chemical liquid tank 38 for the alkaline agent are installed on a gantry not shown in the same manner as the pressurized water production apparatus.

  In the above embodiment, the bottom surface of the agglomeration reaction chamber 10 and the bottom surface of the mixing chamber 20 are at the same level. However, as shown in the embodiment of FIG. The lower part of the reaction chamber 10 and the mixing chamber 20 may be communicated with each other by an upward outlet 51.

  FIG. 5 is a longitudinal sectional view in the longitudinal direction of a pressurized flotation separation apparatus according to a configuration in which the agglomeration reaction chamber is deepened and multistaged. The other configuration of the pressurized levitation separator of FIG. 5 is the same as that of the above embodiment, and the same reference numerals indicate the same parts.

The apparatus of the present invention is suitable for aggregation, pressurization, and flotation separation of SS-containing water having an oil content and a relatively small specific gravity, but can be used for other various wastewater treatment.

It is an elevational view of the pressurized levitation separator according to the embodiment. It is a longitudinal cross-sectional view of the longitudinal direction of the pressurization floating separation apparatus concerning the said embodiment. It is a cross-sectional perspective view which shows the structure of a partition wall vicinity. It is the figure which looked at the pressurization levitation separator concerning the above-mentioned embodiment from the top. It is a longitudinal cross-sectional view of the longitudinal direction of the pressure flotation separation apparatus concerning another embodiment. It is sectional drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Partition wall 2 Partition 3 Tank body 10 Aggregation reaction chamber 15 Stirrer 16, 16 ', 51 Outlet 20 Mixing chamber 22 Pressurized water production apparatus 23 Nozzle 30 Levitation separation chamber 31 Scraper 32 Base 34 Leg 36 Distribution board / control panel

Claims (5)

In a pressurized levitation separation device that separates water to be treated by pressure levitation,
A tank body having downward legs, and a pressurized water production apparatus installed on the gantry is stored in a space below the tank body held by the legs;
A pressurized flotation separation apparatus characterized in that a pressurized water inlet for introducing pressurized water produced by a pressurized water production apparatus into the tank is provided at the bottom of the tank. In claim 1, the tank body is divided into a mixing chamber and a floating separation chamber by a partition,
The water to be treated is introduced into the mixing chamber,
The partition wall rises from the bottom surface of the tank body, and the upper end of the partition wall is positioned lower than the water surface level of the tank body so that water flows out to the mixing chamber through the upper side of the partition wall. ,
The pressurized flotation separation apparatus, wherein the pressurized water inlet is provided at the bottom of the mixing chamber. In claim 1 or 2, the tank body is partitioned by a partition wall and a partition wall so that an agglomeration reaction chamber, a mixing chamber, and a floating separation chamber are installed in this order,
The partition wall is disposed between the agglomeration reaction chamber and the mixing chamber;
The partition is disposed between the mixing chamber and the floating separation chamber,
An outlet for allowing the agglomeration reaction water to flow out from the agglomeration reaction chamber to the mixing chamber is provided at the lower part of the partition wall,
The partition wall rises from the bottom surface of the tank body, and the upper end of the partition wall is positioned lower than the water surface level of the tank body so that water flows out to the mixing chamber through the upper side of the partition wall. ,
The pressurized flotation separation apparatus, wherein the pressurized water inlet is provided at the bottom of the mixing chamber. In any one of Claims 1 thru | or 3, in the space under the tank body hold | maintained by the said leg, it stored one or more of the chemical | medical solution tank, the chemical injection pump, the switchboard, or the control panel which were installed on the mount frame, It is characterized by the above-mentioned. Pressed levitation separator. In Claim 4, a part of the chemical solution tank is provided in a space below the tank body held by the legs, and a supply port for supplying chemical solution to the chemical injection tank is a space below the floating tank. A pressure levitation separator characterized in that it is provided so as to protrude from the outside.

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