JPS608846B2 - Suspended matter and oil removal equipment in wastewater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a cylindrical rotating drum whose inner peripheral surface is covered with wire mesh of 4-pole mesh, which is arranged at a gentle inclination, and which is rotated at a low speed. The sewage mixed with various impurities is diffused and injected from the upper end onto the wire mesh on the inner peripheral surface, and the sewage is filtered through the mesh.
This invention relates to a device for removing suspended solids and oil from wastewater, which separates and discharges impurities from the wastewater along with oil from the lower end of a rotating drum.

Conventionally, sewage discharged from various factories has been contaminated with various impurities, which further deteriorates the quality of the sewage and makes purification of the sewage even more difficult.

For example, in food manufacturing factories, large amounts of water are used to wash food when processing it, but after this washing, factory wastewater contains many inedible items such as feathers, small bones, small pieces of meat, and offal. If the wastewater is treated as such, it will cause a problem in the purification process, so only the coarse solids are removed and other contaminants are treated as wastewater. However, small pieces of meat, internal organs, etc. mixed in such wastewater easily rot and decompose during the wastewater treatment process, extremely deteriorating the quality of the wastewater and reducing the purification efficiency of the wastewater.
In addition, feathers, small bones, etc. in the wastewater are collected by pumps of purification equipment,
This shortens the lifespan of valves, and the oil (N-hexane) that is generated or used in various food processing stages and is discarded with wastewater is used in activated sludge beds, which are the main component of purification treatment. etc., making wastewater treatment impossible. The present invention mechanically separates impurities in wastewater by spraying wastewater mixed with various impurities from the upper end of a cylindrical rotating drum toward a wire mesh with a very small mesh stretched over the inner peripheral surface. Therefore, the wastewater filtered through the wire mesh can be purified more easily than before without worrying about deteriorating the water quality during subsequent purification treatment, and the separated impurities are Oil (N-
Since 70% or more of the N-hexane is deposited and collected and discharged from the lower end of the rotating drum, there is no concern that the efficiency of the purification treatment will decrease due to oil (N-hexane) or that the treatment will not be possible.

To explain this with reference to an example, a wire mesh 3 having a mesh size of 1 to 3 is formed on the inner circumferential surface of an outer cylinder 2 in which a large number of circular, oval, etc. discharge holes 1 are bored on the entire circumferential surface of a cylindrical metal plate. At the same time,
A rotary drum 6 formed by attaching retaining joints 5, 5' to which V-belt pulleys 4, 4' are attached to both sides of the outer cylinder 2 is mounted in the center of the machine frame 7 so as to be gently inclined. Rotating low hoos 8, 8'9, 9'10, 10', 11, 1 attached to both sides of
A V-belt pulley 13 is attached to a rotating shaft 12 which is mounted on the machine frame 7 and parallel to the rotating drum 6.
, 13' and the V-belt pulleys 4, 4' of the rotating drum 6, the V-belts 14, 14' are chained so that the rotating drum 6 is rotated at a low speed by the motor 15 provided on the machine frame 7, and the rotating drum 6 is rotated at a low speed. An inlet pipe 16 is piped into the rotating drum 6 from the upper end entrance of the drum 6, and the protruding part of a conical diffuser plate 17 is arranged at the tip of the inlet pipe 16 so as to face the opening of the inlet pipe 16. At the same time, injection pipes 16, 19 with injection nozzles 18, 18', . Rotary brushes 20 and 20' are placed above the inner peripheral surface of the wire mesh 3 stretched in the rotating drum 6 to prevent clogging by pressing the wire mesh 3 with a spring or the like, and rotary brushes 20 and 20' are installed below the inner peripheral surface of the wire mesh 3 to prevent clogging. In order to promote the discharge of impurities 21, a long and narrow discharge plate 22 is provided. The holding cage 27 is a shielding plate.

The present invention has the above-mentioned configuration, and the members constituting the rotating drum 6 are all made of highly corrosion-resistant stainless steel, and the mesh size of the wire mesh 3 is changed as appropriate depending on the type of wastewater from the factory. However, in normal cases, if a 50-mesh wire mesh 3 is used, the impurities 21 in the sewage can be completely removed from any kind of sewage; It can be used not only for removing solid matter mixed in aqueous liquid, but also for separating solid matter mixed into aqueous liquid.
In order to reinforce the wire mesh 3, a large number of circular, oval, etc. discharge holes 1 are bored in the metal plate over the entire circumference to protect the wire mesh 3 from damage or deformation.

To explain the removal of impurities and oil from wastewater according to the present invention, if wastewater is forcefully introduced into the rotary drum 6 rotating at a low speed through the introduction pipe 16 using a submersible pump or the like, the tip of the introduction pipe 16 has a conical shape. Since a shaped diffusion plate 17 is attached, the wastewater is radially diffused toward the wire mesh 3 of the rotating drum 6, and the liquid in the wastewater is filtered through the wire mesh 3 and the discharge hole 1 of the outer cylinder 2. 21.
remains on the wire mesh 3 and moves to the lower end of the rotating drum 6 as the rotating drum 6 rotates; The filtrated wastewater introduced into the injection pipes 19, 19' piped on the outer circumferential surface of the wire mesh 3 is ejected more forcefully from the injection nozzles 18, 18', ... to remove these impurities 21 and drain the wire mesh 3. This prevents clogging. In order to completely remove the impurities 21 adhering to the wire mesh 3, rotating brushes 20 and 20' are pressed against the wire mesh 3 by means of a spring or the like above the inner circumferential surface of the wire mesh 3, and as the rotating drum 6 rotates. The screen is rotated to clean the mesh, and the foreign matter 2 remaining below the rotating drum 6 is cleaned.
The waste matter 21 in the waste water is completely separated and removed by the discharge plate 22 formed of a metal plate or a rubber plate which discharges the waste matter 21 accurately to the lower end of the rotating drum 6. Further, the impurities 21 remaining from the upper end of the rotating drum 6 are removed from the rotating drum 6.
Oil content (N-
70% or more of hexane) is attached and discharged together with the pollutants 21. The application of the present invention is not limited to the removal of impurities in sewage as described above, but depends on the range of use, such as the length of the rotating drum 6, the mesh size of the wire mesh 3, and the diffusion plate 1.
By freely changing the diffusion angle of step 7, solids mixed in water are mechanically and continuously separated.For example, this invention is useful when excavating a tunnel using a large amount of pressurized water. It can be used as an extremely wide range of useful inventions, such as the ability to completely separate water and soil and reuse the water.

[Brief explanation of the drawing]

Fig. 1 is a front view of the present invention, Fig. 2 is a right side view, Fig. 3 is a partially cutaway enlarged view of the rotating drum, Fig. 4 is a cut end view taken along line A-A in Fig. 3, and Fig. 5. is a vertical sectional view of the rotating drum with the rotating brush and discharge plate attached, and Figure 6 is Figure 5B-
It is a sectional view taken along the B line. In the figure, 1...discharge hole, 2...outer cylinder, 3...
...wire mesh, 4,4',13,13'...V belt pulley, 5,5'...holding cylinder, 6...rotating drum, 7...machine Frame, 8, 8'9, 9'10,
10'11, 11'...Rotating low-fu, 12...Rotating shaft, 14, 14'...V belt, 15...Motor,
16...Introduction pipe, 17...Diffusion plate, 18,
18'... Injection nozzle, 19, 19'... Injection pipe, 20, 20' Rotating brush, 21... Exhaust material, 22... Discharge plate. Tajime Sota 2 Koji Tamanawa 4 Candles Tagunawa Sairu Mari

Claims (1)

[Claims] 1. A metal plate having a cylindrical shape and a large number of circular, elliptical, etc. discharge holes formed on the entire circumferential surface of the outer cylinder. A rotating drum formed by connecting holding cylinders with V-belt pulleys fixed to both ends of the cylinder is horizontally mounted on rotating rollers attached to both sides of the machine frame so as to be gently inclined to the center of the machine frame. In addition, a V-belt pulley attached to a rotating shaft mounted horizontally on the machine frame in parallel with the rotating drum, and a V-belt pulley attached to the rotating drum.
A V-belt is wrapped around each belt pulley so that the rotating drum is rotated at low speed by a motor installed on the machine frame, and an introduction pipe is arranged inside the rotating drum from the upper end opening of the rotating drum, and the introduction pipe At the tip of the drum, a conical diffuser plate is attached so that its protruding part faces the mouth of the introduction pipe, and a number of injection nozzles are installed above the outer peripheral surface of the rotating drum toward the discharge hole of the outer cylinder. A device for removing suspended solids and oil from wastewater, which is constructed by piping a spray pipe that has been installed. 2. A wire mesh with a very small mesh is stretched on the inner peripheral surface of an outer cylinder in which a large number of circular, oval, etc. discharge holes are bored on the entire circumferential surface of a cylindrical metal plate, and a wire mesh with a very small mesh is stretched above the inner peripheral surface of the wire mesh. A rotating brush is installed to press the wire mesh with a spring or the like to prevent clogging, and a long and narrow discharge plate is installed below the inner peripheral surface of the wire mesh to promote the discharge of impurities in the waste water. V on both ends
A rotating drum formed by a series of holding cylinders to which belt pulleys are fixed is placed horizontally on rotating rollers attached to both sides of the machine frame so as to be gently inclined in the center of the machine frame, and then placed on the machine frame. A V-belt is passed between a V-belt pulley attached to a rotating shaft horizontally suspended parallel to the rotating drum and a V-belt pulley of the rotating drum, so that the rotating drum is rotated at a low speed by a motor installed on the machine frame. In addition, an introduction pipe is piped into the rotating drum from the upper end opening of the rotating drum, and is attached to the tip of the introduction pipe so that the convex part of the conical diffuser plate faces the pipe opening of the introduction pipe. Additionally, an apparatus for removing suspended solids and oil in wastewater is constructed by piping an injection pipe with a large number of injection nozzles attached above the outer circumferential surface of the rotating drum toward the discharge hole of the outer cylinder.