JPS59150595A - Ejector device capable of freely changing depth of water for suction of air - Google Patents

Abstract

PURPOSE:To enhance power for agitating filthy water in a tank, by attaching horizontally or slightly downwards one or more main ejector bodies to one main ejector pipe at right angle to the main ejector pipe in a manner such that the ejectors are arranged in parallel with each other. CONSTITUTION:A main ejector pipe 1 is provided inside an aeration tank 2, and water 3 sent through an aerating pump is supplied through a flexible tube 4 and a receiving opening 5 into the pipe 1. Main ejector bodies 6 and suction pipes 7 equipped with openings at the jet parts of said main ejector bodies 6 are attached to the main ejector pipe 1. The lower end of a guide rail 8 is fixed onto the bottom of the tank 2, while the upper end is fixed to the upper wall surface of the tank 2. In addition, elevators 11 are provided at the uppermost ends. Two movable supporting stands 9 at the right and left sides support the main ejector pipe 1 and vertically move at the same time. Rotating or sliding pieces 10 are engaged with the guide of the guide rail 8 to make the elevating motion of the movable supporting stands 9 smooth.

Description

Detailed Description of the Invention Recently, an e-accumulation device used in a sewage tank is used to remove aerated water by using an ejector connected directly or indirectly to an aeration pump and equipped with an intake pipe having an intake port in the atmosphere. Some products inject air into the tank or at the bottom of the tank.

However, in either case, the intake position with respect to the ejector body is fixed to the bottom of the haze tank. Therefore, when the intake air amount is insufficient, it is necessary to increase the capacity of the intake air pump or to increase the size of the entire ejector device.

In fact, when installing an ejector in a tile-shaped or square aeration tank, determine the pump capacity and installation location based on specifications such as the BOD (biological oxygen content) and 88 (suspended solids) removal rate of wastewater. The design details vary greatly depending on the shape of the air tank, especially the depth of the water, the length of the tank in the injection direction, and the properties of the stock solution, so the designer is forced to use a large safety factor, which is the biggest difficulty. ing.

The present invention takes into account the above-mentioned points, and the present invention provides an integrated ejector main body, an intake pipe, and a main ejector pipe installed in an aeration tank by an elevating device using idle rails provided on both sides. Since the water depth can be easily and steplessly adjusted freely, it is possible to increase the amount of intake air and the ability to stir the sewage inside the tank compared to the conventional case where it is fixed to the bottom of the tank. Not only can the optimal intake water depth position be determined while observing the BOD removal rate, but it also gives designers a considerable amount of margin and facilitates basic design.

In detail for the embodiment shown, / is the main ejector tube installed in the shaft l, and the blower pump (not shown)
The water 3 from the pipe is supplied into the pipe from the receiving port 5 through the flexible pipe.

What is an ejector body (the figure shows an example of q units installed in parallel) is an intake pipe with an opening in each jet part of the ejector body, and is attached to the main ejector pipe together with the ejector body.

Reference numeral 8 denotes a guide rail, the lower end of which is fixed to the tank bottom, the upper end to the upper wall of the tank, and the uppermost end of which is provided with a lifting device (regardless of whether it is a manual barrel or an electric barrel). The movable support stand 9 has left and right parts that support the main ejector tube (and both 6.7).
At the same time, it supports lifting and lowering operations.

Numeral 10 is a roller or slider that engages with the guide of the idle rail 8 to smoothly move the movable support base 9 up and down.

As described above, according to the apparatus of the present invention, when lifting the main body of the ejector with the attachment/detachment device, it is necessary to remove the tank liquid from the aeration tank to empty the tank. Accordingly, this need is eliminated and it can remain in the full state.

In addition, if the ejector's intake position is fixed at the bottom of the tank, it is only necessary to adjust the intake water depth using a lifting device instead of increasing the size of the F3 aeration pump in order to increase the amount of intake air. .

Not only that, but compared to the conventional 7 ejectors, 7
However, according to the present invention, a set of moon viewing devices is required.
Only 7 sets of idle rail devices are required for 2 to S ejector bodies, making it extremely economical.

Designers and operators can maintain optimal aeration conditions by correcting the intake water depth while referring to the dispersion state of air in the tank and BOD removal rate, etc., which greatly reduces design effort and operational management. Don't overlook the effects that can be improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view thereof, and FIG. 2 is a front view thereof. In the figure, / is the ejector pipe, -2 is the warm air tank, 3 is the supply from the warm air pump, the evening is the pipe, 5 is the receiver, the mouth is the ejector body, 7 is the intake pipe, 8 is the rail , 9 is a movable support base, 10 is a rolling element, and // is a lifting device.

Claims (1)

[Scope of Claims] Inside the A4 air tank, seven or more ejector bodies are arranged horizontally or slightly downward in seven main ejector pipes that are movable up and down along the guide rail and installed horizontally. Attach the ejector bodies perpendicularly to each other and parallel to each other. Water is supplied to the main ejector pipe through a hose, etc., which connects the mouth of the main ejector pipe to the air pump, thereby adjusting the water depth of the ejector body and the intake pipe attached to it. Therefore, the underwater ejector device allows the intake water depth in the tank to be changed arbitrarily.