JPH04122404A - Detritus tank - Google Patents

Abstract

PURPOSE:To efficiently separate and remove sediment in water flow by constituting a flow path so that the whole resistance caused between water flow and the respective partition plates is made maximum in the capacity of a limited water tank and also alternately forming upflow and downflow. CONSTITUTION:An equipment for settling, separating and removing sediment 6 present in water flow is equipped with a box-type water tank 1 having a plurality of banks along the direction of water flow, partition plates 2 for partitioning the respective banks and a sand discharge means 3 provided to the bottom part of the water tank 1. A first partition plate 21 selected from among the partition plates 2 is tilted in the direction wherein resistance for water flow is increased. Moreover the respective partition plates 2 are fitted at the positions so that water flow is passed and regulated while it is raised and lowered in order of the lower part of the first partition plate 21, the upper part of a second partition plate 22 and the lower part of the next partition plate 23. In other words, sediment in the water flow can efficiently be separated and removed in a style wherein the specific gravity difference of water and sediment is utilized at the upper limit.

Description

[Detailed description of the invention] (Industrial application field) This invention separates and removes earth and sand contained in a water flow such as irrigation water.
It relates to a removal device.

(Prior Art) Conventionally, regarding the separation of earth and sand in water, there is a method (Zyclone method) that uses centrifugal force to remove particles such as earth and sand from a liquid.

In addition, another method is to allow the sediment in the water to naturally settle to some extent in the tank, then transfer it to the next tank at 4.1, allow further natural settling, and then transfer it to the next tank. There is also a method that separates and removes earth and sand by performing this process in several stages.

(Problems to be Solved by the Invention) Among the above-mentioned conventional technologies, the former has problems such as very expensive equipment, complicated structure, and difficult maintenance, and is not suitable for special applications. It wasn't used much.

In addition, although the latter type has a simple structure, the flow rate of water must be slowed down, which inevitably results in a large device, which requires time and effort in operation and has poor separation and removal efficiency.
Its industrial value was low.

This invention solves these problems with conventional devices,
The object of the present invention is to provide a device that has a simple structure, saves time and effort in operation and maintenance, and has high separation and removal efficiency.

(Means for Solving the Problems) In order to achieve the above object, the present invention has the following configuration. That is, it is a device that sediments and separates sediment present in a water flow to remove it, and includes a box-shaped water tank having a plurality of banks along the water flow direction, a partition plate that partitions each bank, and a bottom part of the water tank. The first partition plate of the partition plates is tilted in a direction that increases the resistance to the water flow, and the water flow is directed below the first partition plate and above the second partition plate. , each partition plate is installed at a position below the next partition plate so that passage is restricted while moving up and down in that order.

(Function) According to the configuration of the present invention, a small opening is formed on the bottom side of the partition plate or the bottom side of the partition plate for water flow to pass through the partition plate that partitions each bank in the aquarium from below, above, and below in order. In addition, the first partition plate is inclined in a direction that increases the resistance to the water flow, so that the water flow gently meanders inside the aquarium along the surface of each partition plate. Due to the flow and the resistance force generated at that time, sediment and other particles in the water flow are sedimented and separated at an accelerated rate and settle at the bottom of the tank.

Since the partition plates are installed in several stages in this way, when the water flows from above to below, it accelerates the settling of sediment, etc., and when it flows from below to one side, the water Earth and sand can be efficiently separated due to the difference in specific gravity of sand, etc. Therefore, by the time the water flows out of the aquarium, the sediment has been completely separated, and the sediment that has settled in the aquarium can be discharged and removed from the aquarium by means of a sand discharge means installed at the bottom of the aquarium. I can do it.

The present invention will be specifically explained below with reference to embodiments shown in the drawings.

(Embodiment) FIG. 1 is an explanatory diagram of a sand settling tank, not showing an embodiment of the present invention. The sand settling tank according to the embodiment includes a box-shaped water tank (1) having a plurality of banks along the water flow direction, a partition and a rib plate (2) that partition each bank, and a drain provided at the bottom of the water tank (1). The first temporary partition (21) of the partition plates (2) is inclined in a direction in which the resistance to water flow increases, and the water flow is
Passage is regulated while lowering J1 in the following order: below the partition plate (21), above the second partition plate (22), below the third partition plate (23), and above the fourth partition plate (24). Each partition plate (21)...(24) is attached to a position such that the

Here, the water inlet (4) is a pipe with nozzle holes provided at multiple angles, and the water flow flowing from the water inlet (4) flows through the first partition plate (21) as shown in the figure.
, and a part of the water flows along the wall of the water tank (1), passes through the second to fourth partition plates (22) to (24), and then flows to the water outlet (5) provided on the opposite side of the wall. ), the liquid flows out under the suction action of a pump (not shown).

The sand settling tank according to this embodiment has the above-mentioned construction, and its usage will now be explained.

Most of the water flow released from the water inlet (4) is directed to the first partition plate (21), which is inclined in the direction of increasing resistance.
During this process, the sediment in the water is separated and deposited as sediment (6) at the bottom of the water tank (1). Further, a part of the water flow flows along the wall surface of the water tank (1) and merges with the above-mentioned water flow while also causing the sediment to settle and separate.

The water flow that has passed under the first partition plate (21) in this way rises along the side of the second partition plate (22), and in the process, sediments settle and separate while the water flow passes through the second partition plate (22). (22), and then the second partition plate (22).
) and the side surface of the third partition plate (23), and in the process also passes under the third partition plate (23) while sedimenting and separating the earth and sand.

The water flow passing under the third partition plate (23)
The opposite side of the partition plate (23) and the fourth partition plate (24)
1" along the side of the screen, pass above the fourth partition plate (24) while sediment is similarly settled and separated, and descend along the opposite side of the fourth and final partition plate (24). While doing so, the water flows out from the outlet (5).

During these processes, the sediment that settles and separates under the action of the partition plates (21) to (24) is placed in a water tank (as shown in Figure 1).
Sediment (6) is deposited at the bottom of the water inlet (1), and its tail increases as it approaches the water inlet (4) and gradually decreases as it approaches the water outlet (5).

Further, the accumulated earth and sand (6) Lj can be discharged out of the water tank (1) by opening the sand discharge valve (3) installed at the bottom of the water tank (]).

In this way, the partition plates (21) to (24) are arranged so that the water flow alternately flows below and above the partition plates (21) to (24).
is installed, and the first partition plate (21) is tilted to reduce the amount of water generated between the water flow and each of the partition plates (2]) to (24).
- Since the flow path is configured so that the barrel resistance is maximized within the limited tank capacity, the water flow is equal to the water outflow D of water J #j (1)
(5) Separation of earth and sand, etc. has been completed completely at the time of flow out, and the system is highly efficient and has a simple structure, so it is convenient and saves time and effort in terms of operation and maintenance.

In this example, the number of partition plates (2) was four, but the invention is not limited to this, and the number of partition plates (2) is four.
), the flow rate of the water flow, the sediment content in the water flow, etc., and are determined in the design.

In the description of this invention, "earth and sand" is used to include suspended solids (in addition to earth and sand), and therefore, this invention can be widely used for removing contaminants from liquids in general.

(Effects of the Invention) According to the present invention, as described above, the flow path is configured so that the l·-tal resistance bC generated between the water flow and each partition plate is maximized within the limited water tank capacity. Since the upward flow and downward flow alternate, it is possible to efficiently separate and remove sediment, etc. in the water flow by making full use of the difference in specific gravity between water and sediment. In addition, the structure is simple, which saves time and effort in terms of operation and maintenance, and both initial costs and running costs can be kept low.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a sand settling tank, not showing one embodiment of the present invention. (1)...water tank, (2)...partition plate, (3)
... Sand discharge valve (sand discharge means) (4) Water inflow 1, (5) Water outlet, (6
)...earth and sand, (2])...first partition plate, (22)...second partition plate, (23)...third partition plate, (24)...
・Fourth partition plate.

Claims (1)

[Claims] This is a device that removes sediment, etc. present in a water stream by sedimentation and separation, and includes a box-shaped aquarium having a plurality of banks along the water flow direction, a partition plate that partitions each bank, and a device provided at the bottom of the aquarium. The first partition plate of the partition plates is tilted in a direction that increases the resistance to the water flow, and the water flow is arranged below the first partition plate, above the second partition plate, and next to the second partition plate. A sand settling tank characterized in that each partition plate is installed at a position below the partition plate so that passage is restricted by moving up and down in this order.