JPS58143860A - Floating separation apparatus - Google Patents

Abstract

PURPOSE:To carry out solid-liquid separation efficiently, by providing a spiral inclined plate to the outer periphery of a float cylinder in a floating separation tank. CONSTITUTION:When an aqueous suspension, pressurized water and air are sent in from an inflow port 7, they are formed into a mixture of a particle group having fine air bubbles adhered thereto and clarified water while raised in a float cylinder 5 and said mixture is flowed into a floating separation tank 1 from a floating port 6. In this case, a floated substance is scraped up by a scraper 9 rotated by an electromotor 11 to be discharged from a discharge port 12. On the other hand, a precipitate 16 such as one with relatively high specific gravity or one insuficient in the adhesion of air bubbles is precipitated through a liquid to be deposited on a spiral inclined plate 8 and, after slid down on the inclined plate 8, accumulated to a tank bottom part 2 while successively guided toward a tank bottom. The precipitate 16' on the tank bottom is discharged by opening a bottom cock 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flotation device for solid-liquid separation, in which a spiral inclined plate is provided around the outer periphery of a flotation cylinder in a flotation tank to shorten the settling distance of sediment and to ), to completely prevent the mixing of sediment and floating materials, and to completely separate the sediment.

This allows efficient solid-liquid separation.

In general, the flotation separation method that separates liquid is a type of method in which fine solids and liquid particles suspended in water are floated as they are or attached to air bubbles, and the floating substances are concentrated and separated, and clear water is obtained at the bottom. It is an engineering operation that is widely applied in water treatment fields such as oil-containing wastewater treatment, sewage treatment, and sewage sludge thickening, as well as in the coal industry and textile industry.

The float separation device using this ridge-floating method generally includes a floating separation tank, a floating earth scraper, a floating earth excavator,
Equipped with a raw water inlet, an air blower, etc., the raw water to be treated is fed through the bottom of the flotation tank either as is or mixed with air, pressurized water, etc., and fine air bubbles are attached to the suspended matter. After gradually raising it to the surface of the water, I scratched it 117 times!
Both old and clear water is collected using a machine, and clear water is collected through a separate pipe.

In the above-mentioned flotation separation operation, it is ideal to float all floating objects and obtain completely clear water.
-1"i1 (floating objects may settle on the surface of the surface, and as a result, it is difficult to obtain sufficient clear water.
This results in a decrease in the 1y rate. In this case, in the float separation/ugly, particles that are floating and particles that are settling are generated at the same time due to the difference in specific gravity and the presence or absence of air bubbles attached, and moreover, when these two are mixed, 71 This is to create a flow, and because the settling velocity of the settling particles is relatively low, the settling and floating of the particles occur simultaneously at the same location.

Therefore, in order to remove the sediment, a conventional method has been to install a sediment removal machine at the bottom of the flotation tank and drive it to rotate to dye the sediment and take it out from the tank bottom. There is. However, in this case, not only is power required, but the structure is also complicated, which is not necessarily satisfactory.

This invention takes the above points into consideration, and provides a spiral slope (square) on the outer periphery of the floating surface in a flotation separation tank, and forms a V-shape for efficient separation of the same liquid. will be explained in VC Detail 1 along with the complete drawings of one embodiment.

In the drawing, (1) is a cylindrical flotation tank with an open soil surface facing the earthwork direction, and (2) is a funnel-shaped tank bottom that forms the bottom of the flotation tank (1), with a bottom plug ( , 3) The sediment collection port is located at the angle of 9 through 2. (5) is float-
Separation tank (This is a flotation tube in the earthwork direction that is installed coaxially within υ and constitutes a floating chamber inside, and the flotation port (0) at the upper end
is opened at the upper part of the flotation tank (1), and the lower end passes through the tank wall of the flotation tank (]).
Suspended water, pressurized water, air, etc. are connected to the inflow pipe (7).
) into the air bearing surface (5). (8) is the levitation tube (
5) are installed on the outer periphery of the flotation tank (1) at equal intervals and are divided into 5 stages in the flotation separation tank (1) and in the earthwork direction, and each slope class (8) is 60 The flotation tank (1) has an inclination angle of more than FM, force, the floating earth chamber size m
It is something that will be done. (9N') - A floating debris scraping machine with multiple spatula-shaped combs (IQ installed radially) on the upper end of the separation tank (1) and the lower surface. When the scraper (9) is rotated by the drive of the electric motor (11), the floating matter on the stop surface of the floating fraction tank #~υ is scraped off. The floating object discharge port which collects the formed floating objects and scraped by the scraping machine (9), (j3) is a floating object outlet (j'l)' at the tip of each slope 1fi.
(8) There are 5 clear water drain pipes each opened near the bottom surface, and each Gll drain pipe (13I is connected to a collecting pipe (14J, and a drain pipe 1"5). is connected to.

Next, the operation of the embodiment will be explained.

Suspended water, pressurized water, air, etc. are sent through the inflow pipe (7) without being separated, and as they rise in the flotation tube (5), particles with fine air bubbles attached thereto are mixed with clear water. and flows out into the flotation separation tank (1) from the flotation port (6). Of the mixed liquid flowing out from the flotation port (6), the floating objects are scraped off by the float (on reaching the upper surface of υ, the scraper 9 rotated by the electric motor 111) and disposed of. It is discharged from the outlet (121). On the other hand, among the mixed liquids discharged from the 2 flotation ports (6), sediments d6), such as those whose specific gravity is relatively thick and those whose air bubbles are insufficiently attached, are Sediment in the liquid, each slope g! <8) Sink onto the inclined plate (8)
) slides down and is guided to the bottom of the tank one by one.
2). This tank bottom (2) has 11 objects.
, ]6) is recovered from the sediment ■ outlet (4) by opening the five-bottom stopper (:3).

Furthermore, when the lower surface of each inclined plate (8) i;
8) Clear water is separated because it settles in the soil, and this clear water flows from each hemp outlet (+i)' to the drain pipe (15) through the outlet pipe (13) and the collecting pipe (14I). It bleeds more.

Therefore, according to the embodiment, by providing four spiral inclined plates (8) at equal intervals on the outer periphery of the flotation tube (5) in the flotation tank (υ), almost the entire length of the flotation tank (υ) is covered. Since the settling distance of equal sediment (16) can be divided into five stages by each inclined plate (8), the above-mentioned 115 settling distance can be formed between each inclined plate (8), and the settling distance The settling time of (]6) can also be shortened to 115 cm, and the sediment till can be quickly settled on each slope plate (8). Since the object (18) has an angle of repose of 60° or more at which the inclined plate (8) sinks and slides down,
The inclined plate (8) slides down the soil, is deposited in sequence at the bottom of the tank (2), and uses power; It is worth cutting down one tree per day.

In addition, the flotation chamber on the two sides of the float) and the settling chamber between each slope (8) are separated in the float separation tank\1), and the 7th ton consists of floating matter and sediment.・To prevent the mixing of J61 & and to effectively separate the two, furthermore,
Valley 1: @ Diagonal I fy (8) between 11 and 11 holes The sedimentation chamber is often affected by the float water flow, and is extremely static VCC Clear water sedimentation Separation from the sedimentation 9 course 16j Moreover, this clear water cannot be obtained as perfectly clear water because it can be pumped out near the bottom of the 8th slope method (which has the highest WB degree). It is highly effective and can efficiently separate floating debris, sediment (16j) and clear water.

Furthermore, in the above embodiment, a 5-cylindrical float separation tank (υ) is used, and its horizontal cross section can be made small.
The slip angle of slope 4fj (8), that is, the slope angle can be completely swept by a dog, and the pinch is also large. Therefore, the sediment t161 can be quickly moved to the tank bottom (
2).

In addition, the levitation tube (5) was set up on the first lap in the evening.
The amount may be increased or decreased as desired depending on the amount of sediment (16).

As described above, according to the flotation separation device of the present invention, the Japanese commercial flotation separator e+ +yq vc floats are arranged on the upper and lower blades, and at the same time, the flotation separator is arranged such that the sediments slide around the outer periphery of the flotation surface. By providing a spiral one-head slope plate with a bevel around 1, it is possible to shorten the settling distance of sediments, shorten the settling time, and increase the overall sedimentation speed. It is possible to reliably prevent the mixing of floating materials with floating materials, and achieve efficient separation, and it is possible to completely separate sedimented materials without complicating the structure and requiring no shredding power. By opening the outlet of the clear water extraction pipe near the lower surface of the inclined plate, clear water with a high degree of clarity can be taken out.

BRIEF DESCRIPTION OF THE DRAWINGS The drawing is a partially cutaway sectional view of one embodiment of the flotation separation device of the present invention. (1)...floating separation tank, (5)...float''-commercial, (8 pieces...1 head tilted, (13);...Kiyosumizushinzuken, (1ya'
...Procurement D, t161... Shen 1 gift. Agent: Patent Attorney Ryutabe Fujita

Claims (1)

[Claims] ■ Cylindrical flotation component with vertical blades oriented = A flotation cylinder with vertical blades oriented in the tank that constitutes a flotation chamber is provided, and the levitation cylinder has an inclination that is such that sediment can slide down on the outer periphery of the flotation cylinder. 1. A flotation separation device characterized by having a spiral sloped plate having a corner and facing toward the bottom of a flotation separation tank. (2) The flotation separation device according to claim 1, wherein an outlet of the clear water outlet pipe is opened near the lower surface of the swash plate.