JPS6135201Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sedimentation tank for the purpose of settling and filtering live mud contained in wastewater, especially household water.

Public sewage facilities are used to treat gray water discharged from general households, and in areas where sewage facilities are not yet in place, it may be discharged directly into rivers, gutters, etc., or it may be sucked into the soil. are being processed.

However, gray water discharged from household kitchens, baths, laundry, etc. contains large amounts of solid matter such as vegetable scraps, hand hair, and oils that have slipped through overused sinks and washrooms. Therefore, when these sludge substances are directly discharged into a river or the like as described above, if these sludge substances flow in at a scale that exceeds the natural purification effect, the sludge accumulates and spoils the aesthetic appearance and seriously pollutes the water quality. Furthermore, in the case of rice fields, eutrophication can cause crop growth problems. Furthermore, if the sludge is sucked directly into the soil, the treatment capacity of the soil will be reduced due to adhesion and accumulation of sludge, which will eventually contaminate nearby groundwater and river water.

By the way, the pollutants contained in gray wastewater include organic substances and inorganic substances. Oxygen in water is required to decompose organic substances, and the amount of oxygen consumed by wastewater containing pollutants in a certain period of time is calculated by BOD (biological The amount of solids suspended in wastewater is called SS (suspended solids), and the higher the value, the higher the degree of pollution.

Therefore, the role of a sedimentation tank for wastewater treatment is to reduce the BOD and SS values by settling and filtering the organic and inorganic solids in the wastewater, thereby reducing the processing burden on the wastewater discharge destination. If we consider the functions of a settling tank for treating gray water, (1) it must be durable, and (2) it must be of a size that can be easily installed on the premises of a general household.

(3) It must have sedimentation and filtration capabilities commensurate with household wastewater volume.

(4) It is easy to maintain and clean sludge.

It is necessary to satisfy the following points.

In particular, settling tanks for general households are often installed in small spaces near kitchens, and the work of treating the settled sludge is often carried out by women and girls. Therefore, even when buried underground, it is durable against earth pressure and corrosion, and although it is compact, it has a large processing capacity.
Moreover, a structure that can be easily cleaned is desired.

Furthermore, since the quality and quantity of wastewater differs from household to household, a sedimentation tank that can handle this is required.

Therefore, in order to improve processing capacity, it is possible to increase the capacity of the sedimentation tank, increase the sedimentation effect by creating a multi-chambered structure, or use a fine-mesh filter to increase the removal effect. However, for household use, there is a natural limit to the size of the sedimentation tank, and if a multi-chamber structure is used, each chamber will require a sedimentation basket, making cleaning more complicated.
If a fine filter is used, a problem arises in that the finer the filter, the smaller the amount of wastewater treated per unit time.

Considering conventional household sedimentation tanks, they are all limited in size and have been made smaller, resulting in insufficient wastewater treatment capacity, or because the tank has multiple chambers to maintain treatment capacity, sludge There were problems such as troublesome removal and cleaning.

In order to improve the above-mentioned problems, the inventor of the present invention has developed a new structure that contributes to improved processing performance as a result of intensive research, and would like to propose it here.

That is, the present invention divides the sedimentation tank into three chambers by providing a curtain-shaped primary filter whose lower end reaches the bottom and a floating matter removal plate forming a lower flow path 11a. A removable sludge basket equipped with a handle is placed at the bottom of the chamber, and the bottoms of the front chamber of the first chamber and the third chamber are inclined so that the sludge flows into the sludge basket, and the front chamber of the first chamber is A square-shaped inflow pipe for preventing odor backflow is inserted, and a baffle plate is suspended from the drain port with a wire.
This is a sedimentation tank for wastewater treatment that houses a curtain-shaped secondary filter in the chamber and connects a discharge pipe.

With this configuration, the water flow can be adjusted by adjusting the installation position and angle of the baffle plate, and since the water flow is dispersed, the water flow is slowed down and the stirring effect of the water flow on dirt in the tank is weakened. It has the effect of shortening the precipitation time more than anything else, and the filter effect of the primary and secondary filters allows even a small precipitation tank to have sufficient processing capacity.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a plan view of the embodiment of the present invention, FIG. 2 is a vertical sectional view thereof, and FIG. 3 is a sectional view taken along the line A--A, where A is a settling tank.

The material of the sedimentation tank body is plastic, concrete, or their fiber-reinforced materials, and the size and weight are such that it can be easily carried.

The inside of the tank is divided into three chambers 1, 2, and 3.
A cross-shaped inflow pipe 5 for preventing odor backflow facing the front chamber 1a of the first chamber is inserted into the inflow port 4, and a baffle plate 6 is connected to the drain port with four wires 7 with the exit side facing upward. It is hung diagonally. In addition, preliminary inlet forming portions 4a and 4b are provided in two other directions so that connections can be made from two or three directions at the same time. Then, a sludge basket 9 equipped with a handle 8 that can be taken in and taken out is placed at the bottom of the rear chamber 1b of the first chamber 1 and the second chamber 2, and a primary filter 10 that can be pulled out upward is placed in the center with its lower end reaching the bottom. Insert until the end and divide it into the first and second chambers. The second chamber 2 and the third chamber 3 are separated by a floating matter removal plate 11 that forms a lower flow path 11a, and the third chamber 3 houses a secondary filter 12, and is further connected to a drain pipe 13. are doing.

The primary filter 10 and the secondary filter 12
The upper part of a synthetic resin ribbon a is fixed to a core plate to form a curtain shape, and the cross-sectional shape, size, density, etc. of the ribbon a are determined by the conditions under which the settling tank is used. Further, the bottoms of the front chamber 1a of the first chamber 1 and the third chamber 3 are inclined so that the sludge flows down into the sludge basket 9. Note that the lower end of each ribbon a usually remains as it is, but may be fixed if necessary. Although not shown in the drawings, the sedimentation tank body is covered with a rust-proofed iron plate or the like to prevent rainwater and external debris from getting mixed in.

With the above structure, when gray water flows into the tank through the odor backflow prevention bend pipe 5, it is dispersed by the baffle plate 6. The scattered wastewater passes through the primary filter 10 while slowing down and diffusing, thereby further weakening the flow.

On the other hand, the sludge in the drainage does not accumulate on the inclined baffle plate 6, but slides down the bottom of the front chamber 1a of the first chamber, or is filtered through the primary filter 10.
The sludge settles and accumulates in the sludge basket 9 installed in the rear chamber 1a of the first chamber.

The wastewater filtered by the primary filter 10 is further filtered by the secondary filter 12 to become purified water, and is discharged from the drain pipe 13 to the outside of the tank.

Floating substances and fats and oils are partially removed by the primary filter 10, but fine floating substances float up when passing through the second chamber 2 and are prevented from advancing by the floating substance removal plate 11. stagnates on the water surface.

When the inflow of gray water stops, wastewater sludge flows into the tank without remaining in the inflow pipe that is higher than the water level in the tank, while the outflow port of the inflow pipe for preventing odor backflow is under water, so the inside of the tank is odors will not flow back into the inlet pipe.

Cleaning the settled sludge is extremely easy. First, the primary filter 10 and the secondary filter 12
Pull out the sludge basket 9, hold the handle 8, and take the sludge basket 9 out of the tank. Since each of the filters 10 and 12 has a curtain shape, clogged sludge can be easily removed by washing with water or squeezing with a comb. The sludge basket 9, which is shared by the first and second chambers, has a net shape and drains easily, so it can be easily lifted. Furthermore, if the handle is not fixed and can be rotated 180 degrees so that the basket can be reversed, cleaning will be easier.

After cleaning, store in reverse order.

As described above, the present invention is used because the outlet of the inflow pipe enters the wastewater in the sedimentation tank, so the odor inside the tank does not flow back into the inflow pipe. It does not have to be left in the kitchen or bathroom, and by determining the installation position of the baffle plate experimentally as described above, a compact sedimentation tank with high processing capacity can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the embodiment of the present invention, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is a sectional view taken along the line A--A. A...Sedimentation tank, 1...First chamber, 2...Second chamber,
3...Third chamber, 4...Inflow port, 5...Inflow pipe, 6...Baffle plate, 7...Wire, 8...Handle, 9
...Sludge basket, 10...Primary filter, 11...
...Floating matter removal plate, 12...Secondary filter, 13
...Exhaust pipe.

Claims (1)

[Scope of utility model registration request] The settling tank A is partitioned into three chambers 1, 2, and 3 by providing a curtain-shaped primary filter 10 whose lower end reaches the bottom and a floating matter removal plate 11 forming a lower flow path 11a, and a rear chamber of the first chamber. A removable sludge basket 9 equipped with a handle 8 is placed at the bottom of 1b and the second chamber 2,
The bottoms of the front chamber 1a of the first chamber 1 and the third chamber 3 are sloped so that the silt flows down into the sludge basket 9, and the front chamber 1a of the first chamber is provided with an inflow pipe shaped like a log to prevent backflow of odor. 5, a baffle plate 6 is suspended from the drain port with a wire 7, a curtain-shaped secondary filter 12 is housed in the third chamber 3, and a discharge pipe 13 is inserted.
A wastewater treatment sedimentation tank characterized by being connected to.