JPH02229536A - Submerged motor agitator for activation of mixture or sludge - Google Patents

Abstract

PURPOSE: To make design and mounting inexpensive by providing the bottom of a vessel with a guide tube and fixing struts to this guide tube. CONSTITUTION: The agitator is fixed to the guide tube 2 at such a distance from the bottom 1 of the vessel at which a propeller 5 can rotate freely. The agitator is fixed to a supporting arm 7 supported by the strut 6. The two struts 8, 9 are fixed to the guide tube 2 at nearly the same height as the height of the supporting arm 7. As a result, the placement of the agitator in the desired position within the vessel is made possible. The agitator is usable in association with a rotary bridge.

Description

[Detailed description of the invention] a. BACKGROUND OF THE INVENTION Process technology and sewage treatment plants use agitators to circulate and convey fluids containing solids and to mechanically agitate sludge particles. A particularly suitable means for circulating fluids containing solids is the use of submersible motor agitators having motor-driven propellers and operating completely submerged in the fluid. The submersible motor agitator eliminates sludge particles, gases and other materials from the entire contents of this vessel, as the very high driving force conveyed by the low energy applied hydraulically by the propeller mixes the suspension thoroughly. Distribute everything completely.

If the best mixing is to be achieved, this agitator should be placed as close to the horizontal as possible, and to achieve this,
The submersible motor stirrer is attached to a guide tube fixed to the bottom of the container. Due to the considerable thrust generated by the propeller,
This guide tube needs to be of very strong construction. Prior art submersible motor stirrers therefore have an additional guide tube fixed to the upper edge of the container.

However, for some applications, it may be necessary to place the submersible motor stirrer more centrally in the vessel, in which case a bridge extending across the vessel and attached to the upper end of this guide tube may be used. to be fixed. The disadvantage of such an arrangement is that a bridge has to be provided only for fixing the upper end of this guide tube, which adds considerably to the cost, or in the case of vessels where a bridge is already provided for other purposes. , the use of this submersible motor agitator is either very limited, if not impossible, and at least extremely complicated. Bridges of this type are generally rotating bridges in which the submersible motor stirrer is retracted from the vessel or at least raised sufficiently above the bottom of the vessel to allow the bridge to rotate before being used for its intended purpose. There must be.

A submersible motor stirrer for mixing and sludge activation vessels, which is the subject of the invention and has the features detailed in the claims, provides a submersible motor stirrer for mixing and sludge activation vessels, which can be placed in any desired position within the vessel, such as
It has the advantage over conventional units of being able to be placed at a desired height from the bottom of the container. The firm holding of this submersible motor stirrer is ensured by the special construction of the guide tube, which has two supports directed downwards and fixed to the bottom of the container. The design of the guide tube included in the present invention ensures that the significant reaction forces transmitted from the submersible motor stirrer are absorbed by these two supports that slope downwardly from the stirrer towards the bottom of the vessel. It has the added advantage of being

A further advantage is that the submersible motor stirrer according to the invention is simple and inexpensive to design and install, since the guide tube is fixed only to the bottom of the container.

A further advantage is that the submersible motor stirrer according to the invention can also be used in conjunction with a rotating bridge, with the guide tube fixed only to the bottom of the vessel. There is no need to retract or raise the submersible motor stirrer from the vessel when the rotating bridge is in operation.

Lifting or removing this agitator for repairs can be carried out without difficulty by means of a conventional lifting derrick, so that containers that are not only occasionally filled, such as sludge activation containers, can be used to carry out repair work. It is particularly advantageous to use the in-ice motor stirrer according to the invention in such containers, since it is not possible to enter them.

Further details of the features and advantages of the design of the invention can be found from the following description, drawings and claims.

mouth. Embodiment The side view of the submersible motor stirrer shown in FIG.
It is shown that an agitator 3, including a motor 4 and a propeller 5, is supported on and can slide on a vertical guide tube 2 fixed to the .

The stirrer is mounted on a support arm 7 fixed to the guide tube 2 and supported by a strut 6 at a distance from the bottom 1 of the vessel at least such that the propeller 5 can freely rotate.
It is placed with a fixed external shape. At approximately the same height as this support arm 7, two struts 8, 9 are similarly fixed at their ends to this guide tube 2. These two struts are inclined downwardly, each at an acute angle to the guide tube 2 and approximately at right angles to each other, and their other ends are fixed to the container bottom 1. The mechanism for raising and lowering is not shown.

FIG. 2 shows the angular relationship between these two struts 8, 9 and the support arm 7 as projected onto a horizontal plane perpendicular to this guide tube.

The angle between the two struts 8, 9 is preferably around 90°, and the angle between the support arm 7 and each of these two struts 8, 9 is preferably around 135°.

Any of the features recited in the claims and shown in the drawings, either alone or in combination, may
In any case, it may be important to the present invention.

[Brief explanation of the drawing]

FIG. 1 is a side view in a simplified representation of a submersible motor stirrer according to the invention, with a guide tube fixed to the bottom of the container. FIG. 2 shows a simplified representation from above of the guide tube with its lateral supports and support for the stirrer unit. 1... Bottom, 2... Guide pipe, 4... Motor, 5... Propeller, 8, 9... Support.

Claims (1)

[Claims] (1) A submersible motor agitator for a mixing and sludge activation vessel, comprising a propeller driven by an electric motor designed as a submersible motor, with a guide oriented at right angles to the bottom of the vessel. In a stirrer mounted in such a way that it can move up and down on the tube and, when in its operating position, rests fixedly on a support arm fixed to the guide tube, the guide tube (2 ) has only a provision fixed to the bottom (1) of this vessel, and two struts (8, 9) support the motor (4) and the propeller (
5) arranged to withstand the reaction force exerted by a stirrer, the struts being fixed at one end to this guide tube (2) below this stirrer and at the other end so that they are connected to the bottom of this vessel. (1) A stirrer characterized in that it is provided to be fixed to.