JP2750139B2 - Miscellaneous wastewater purification equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to kitchen wastewater containing garbage, vegetable waste, oil and fat, etc.
The present invention relates to a wastewater purification apparatus for purifying wastewater such as wastewater containing oils and fats and garbage in an equipment repair shop or a gas station.

(Prior art) In recent years, most kitchens in restaurants have been provided with a wastewater treatment tank, which collects wastewater discharged from the kitchen containing leftovers, vegetable scraps, oils and fats, etc. The solids are settled or floated, and the fats and oils are floated and stored to prevent outflow, and only clear water is discharged to sewage.

Conventionally, solids and the like accumulated in the wastewater treatment tank are periodically pumped and cleaned to maintain the obstruction function and to prevent odor.

(Problems to be Solved by the Invention) By the way, the work of collecting solids and the like accumulated in the wastewater treatment tank must be artificially pumped out with a hisashi or a vacuum cleaner for cleaning. The disposal of miscellaneous wastewater containing solids and other substances is difficult because of its large volume. Also, when using a vacuum truck, since the vacuum truck does not enter the store as well as the kitchen, the vacuum truck must be stopped on the road and the hose must be drawn into the store, and the hose must be pulled many times a month. At present, there is a problem of hygiene, cleaning cost is high, cleaning is neglected, cleaning is easy, and bad odor is generated.

The present invention has been made in view of the above situation, and an object of the present invention is to mechanically and easily perform the pumping of miscellaneous wastewater in a miscellaneous wastewater treatment tank in a kitchen, etc. Another object of the present invention is to provide an apparatus capable of purifying miscellaneous wastewater by separating and removing fats and oils.

(Means for Solving the Problems) In order to achieve the above object, the present invention has taken the following technical means.

That is, the present invention relates to a centrifugal dehydration type
Solid / liquid separation tank 4 having an internal space, and a wastewater treatment tank 19
Miscellaneous wastewater transfer means 17 that guides miscellaneous wastewater into solid-liquid separation means
Wastewater transfer means for transferring wastewater separated by the solid / liquid separation means 7 and stored in the lower part of the solid / liquid separation tank 4 to the oil / water separation tank 24
31; and the wastewater transfer means 17 comprises a solid / liquid separation tank 4
Vacuum pump 22 that creates a negative pressure in the internal space above the water surface inside
And a suction pipe 20 for guiding the wastewater from the wastewater treatment tank 19 to the solid / liquid separating means 7 by negative pressure in the internal space.

Further, the solid / liquid separation tank 4, the miscellaneous wastewater transfer means 17, the oil / water separation tank 24, and the wastewater transfer means 31 are provided on the portable trolley 1, and the separated wastewater is returned to the oil / water separation tank 24 into the miscellaneous wastewater treatment tank 19. Outlet pipe
34 is connected.

(Operation) According to the present invention, the wastewater collected in the wastewater treatment tank 19 is guided to the solid / liquid separation means 7 in the solid / liquid separation tank 4 by the wastewater transfer means 17, Separated into waste and wastewater. The separated wastewater stored in the solid / liquid separation tank 4 is guided into the oil / water separation tank 24 by the wastewater transfer means 31, where the fats and oils are floated and separated, and the floated fats and oils are taken out to the outside. The separated and purified wastewater is taken out of the oil / water separation tank 24 and discharged to the sewer or returned to the gray water treatment tank 19. The solid matter separated by the solid / liquid separation means 7 is taken out and collected as raw garbage or general garbage.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In the drawings, reference numeral 1 denotes a transportable vehicle having a plurality of wheels 2 (which may be a free wheel), and a separation tank mounting base 3 provided on one side of the upper surface.

Reference numeral 4 denotes a solid / liquid separation tank, which is provided on the separation tank mounting base 3 and has a flange 5 formed in an upper opening, which is airtightly closed by a lid 6 which can be opened and closed.

Reference numeral 7 denotes a basket-type centrifugal dehydrator, which is a solid / liquid separating means, which penetrates the center of the bottom plate 4A of the solid / liquid separating tank 4 and is rotatably supported via a bearing 8; An upward-opening dehydrating basket 11 which is located at the center of the separation tank 4 and is detachably fixed to the upper end of the vertical shaft 9 via bolts or the like via a flange 10.
A drive motor 12 provided on the portable vehicle 1, a pulley 13 fixed to the motor output shaft, a transmission pulley 14 fixed to a lower portion of the vertical shaft 9, and a transmission belt wound around the two pulleys 13, 14. 15 and a pivot bearing 16 for supporting the lower end of the vertical shaft 9 on the carriage 1.

17 is a wastewater transfer means, that is, a means for guiding the wastewater from a wastewater treatment tank 19 (also referred to as a coarse grease collector) embedded in the ground or floor 18 to the dewatering basket 11 in the solid / liquid separation tank 4. Thus, a vacuum suction method is employed. The miscellaneous drainage transfer means 17 is arranged such that the lower end of the solid / liquid separation tank 4 penetrates the upper end of the side wall of the solid / liquid separation tank 4, and the lower end of the solid / liquid separation tank 4 is located in the upper part of the dewatering basket 11. Miscellaneous drainage suction pipe 20
And a vacuum pump 22 whose suction port 21 is opened in the upper part of the side wall of the solid / liquid separation tank 4.
It is fixed on a support table 23 attached to the gantry 3.
The operation of the vacuum pump 22 causes the solid / liquid separation tank 4 to operate.
When the internal pressure is reduced and a vacuum is established, miscellaneous wastewater is sucked from the treatment tank 19 via the suction pipe 20 and guided into the dewatering basket 11. That is, the wastewater transfer means 17 is such that the vacuum pump 22 makes the internal space above the water surface in the solid / liquid separation tank 4 a negative pressure, and the negative pressure in the internal space causes the suction pipe 20 to solidify from the wastewater treatment tank 19. -Guide the wastewater to the liquid separating means 7.

Numeral 24 denotes an oil / water separation tank, which is installed on the portable trolley 1, has an upper opening, and is positioned so that the upper end surface is lower than the bottom plate 4A of the solid / liquid separation tank 4. One or a plurality of diffuser tubes 25 are disposed near the inner surface, and are provided at the discharge port of a diffuser pump 26 (or an air compressor) installed on the portable truck 1 outside the oil / water separation tank 24. A diffuser tube 25 is connected to diffuse air into water to float and separate oils and fats into bubbles. That is, the oil / water separation tank 24 is an aeration treatment tank. An oil / fat collecting section 27 is formed in the oil / water separation tank 24, and the oil / fat that has flowed over the partition wall 27A is taken out to a collecting container 29 by an oil take-out pipe. Note that
Reference numeral 30 denotes an on-off valve provided on the oil extraction pipe 28.

Numeral 31 denotes a means for transferring the separated wastewater separated and stored in the solid / liquid separation tank 4, which includes a drainage transfer pipe 32 fixed to the lower end of the side wall of the separation tank 4 in a penetrating manner and an on-off valve 33 provided in the middle thereof. When the on-off valve 33 is opened, it flows out by its own weight and flows into the oil-water separation tank 24.

Reference numeral 34 denotes a discharge pipe for treated wastewater, which is connected to the lower end of the side wall of the oil / water separation tank 24 (or the bottom plate 24A), and an on-off valve 35 is provided in the middle.

Reference numeral 36 denotes an overflow opening provided at the upper part of the side wall of the oil / water separation tank 24.

In addition, the dewatering basket 11 can be formed by forming a perforated plate into a cylindrical shape, or by attaching a mesh such as a wire net to the inside thereof, and further, inside the dewatering basket 11, a mesh bag 11a ( For example, paper, synthetic resin, or the like) is detachably mounted, and the collected solid matter can be taken out and disposed of without removing the dewatering basket 11.

Further, it is preferable that the entire outside portion of the miscellaneous drainage suction pipe 20 or a part on the suction end side is a flexible hose, and a part of the open end side of the treated drainage discharge pipe 34 is also a flexible hose. It is preferable that insertion into the wastewater treatment tank 19 can be easily performed.

The gray water treatment tank 19 has two partition members 37 inside.
And is divided into three rooms 38, 39, and 40.
38, drains the wastewater into the communication passages 42 and 43 below the bulkhead member 37.
While flowing through the outlet pipe 44,
It is configured to collect and collect intercepts at 38-40.
In addition, 45 is a water flow turning plate.

In the above embodiment, when pumping and treating the wastewater in the wastewater treatment tank 19, the portable vehicle 1 is moved to a place where the wastewater treatment tank 19 is installed in a kitchen or the like, and as shown in the drawing, the wastewater treatment is performed. Outer end of miscellaneous wastewater suction pipe 20 and treated wastewater discharge pipe in tank 19
Insert the outer end of 34.

At this time, the on-off valves 33 and 35 are closed, and the air diffusion pump 26 is stopped.

When the operation of the vacuum pump 22 starts, the air pressure in the solid / liquid separation tank 4 decreases and approaches a vacuum state. As a result, miscellaneous wastewater is sucked up by the suction pipe 20 and guided into the dewatering basket 11. The pressure in the separation tank 4 is detected by a pressure switch (not shown), the operation of the drive motor 12 is started, and the dewatering basket 11 rotates. Moisture is released and separated by centrifugal force caused by the rotation of the dewatering basket 11, and solids such as leftovers and sludge are collected in the dewatering basket 11. In this way, when the gray water treatment tank 19 becomes empty, the vacuum pump 22 is stopped,
Thereafter, the drive motor 12 is stopped.

Then, when the on-off valve 33 is opened, the separated drainage stored in the solid / liquid separation tank 4 is transferred from the drainage transfer pipe 32 into the oil / water separation tank 24.
It flows under its own weight, that is, gravity.

Next, the operation of the air diffusion pump 26 is started, and the oil / water separation tank is started.
24 Air is blown out from the bottom during drainage and aeration is performed.
The oils and fats are floated and separated in the form of foam, and the wastewater is purified. The oils and fats that floated in this way are separated from the partition wall 27A.
, And flows into the oil and fat collecting section 27, and is guided from the oil extraction pipe 28 to the collection container 29.

In addition, the purified wastewater flows out through the extraction pipe 34 by gravity by opening the on-off valve 35, and is returned into the miscellaneous wastewater treatment tank 19. On the other hand, the solid matter in the dehydrating basket 11 is taken out together with the mesh bag and disposed as garbage or general garbage.

When the drainage purification process in the oil / water separation tank 24 is completed, one cycle of the purification process of the gray water is completed by stopping the air diffuser pump 26. In addition, miscellaneous wastewater treatment tank
The above-described pumping and purifying processing cycle may be repeated according to the cleaning state in 19. If the capacity of the solid / liquid separation tank 4 is smaller than the capacity of the treatment tank 19, oil / water separation and drainage transfer are performed in parallel with the solid / liquid separation, and all functions are performed until the wastewater is purified. May be continuously operated to circulate waste water between the treatment tank 19 and the purification device.

The oil / fat collection container 29 in the present invention may be placed on the portable trolley 1.

In addition, the apparatus of the present invention is used in kitchens and other gray water treatment tanks 19.
It can be stationed at the burial site.

(Effect of the Invention) As described above, according to the present invention, the wastewater separated by the solid / liquid separation means 7 is stored in the lower part of the solid / liquid separation tank 4 and the oil / water separation is continuously performed in the oil / water separation tank 24. And on top of that,
The vacuum pump 22 of the miscellaneous drainage transfer means 17 creates a negative pressure in the internal space above the water surface in the solid / liquid separation tank 4, so that it does not suck in moisture and the efficiency of generating a negative pressure in the solid / liquid separation tank 4. It does not suck the fats and oils contained in the wastewater after solid / liquid separation, so that the separation process of the fats and oils cannot be performed and the air suction passage is not clogged with the fats and oils. Work can be continued for a long time.

In addition, the solid / liquid separation tank 4, the miscellaneous wastewater transfer means 17, the oil / water separation tank 24, and the wastewater transfer means 31 are provided on the portable trolley 1,
An extraction pipe 34 is connected to the oil / water separation tank 24 to return the separated wastewater to the gray water treatment tank 19, so that wastewater containing no oil and fat can be returned. Even in a place where there is no separation, the purification work and the treatment of the separated wastewater can be easily performed, and the separated wastewater does not need to be stored on the portable carriage 1, so that a large amount of the wastewater can be treated.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention. 1 ... portable truck, 4 ... solid / liquid separation tank, 7 ... solid / liquid separation means, 17 ... miscellaneous wastewater transfer means, 19 ... miscellaneous wastewater treatment tank,
24 ... oil / water separation tank, 31 ... drainage transfer means.

Claims (2)

(57) [Claims] 1. A solid / liquid separation tank (4) provided with a centrifugally dewatering type solid / liquid separation means (7) in an internal space, and a gray water treatment tank (1).
9) Miscellaneous wastewater transfer means (17) for guiding the miscellaneous wastewater to solid / liquid separation means (7), and separated by solid / liquid separation means (7) and collected in the lower part of solid / liquid separation tank (4). Drain the oil / water separation tank (2
And a wastewater transfer means (17) for transferring to the solid / liquid separation tank (4) a negative pressure in the internal space above the water surface in the solid / liquid separation tank (4). And a suction pipe (20) for guiding the wastewater from the wastewater treatment tank (19) to the solid / liquid separation means (7) by negative pressure in the internal space. 2. An oil / water separation tank provided with a solid / liquid separation tank (4), a wastewater transfer means (17), an oil / water separation tank (24), and a wastewater transfer means (31) on a portable vehicle (1). An apparatus for purifying gray water according to claim 1, wherein an outlet pipe (34) for returning separated water to the gray water treatment tank (19) is connected to (24).