JPH04102700U - Aeration device - Google Patents

Abstract

(57) [Summary] [Purpose] Enables aeration of stored water by generating a suction vortex on the suction side of an underwater agitator. [Structure] An underwater agitator 2 is supported on an adjustment stand 2 installed at the bottom B of a pond such as a reservoir P.
The funnel body 4A is connected to the upper end and the mixing chamber 5 is connected to the lower end, and the diffusion cylinder 6 is connected to the lower end of the mixing chamber 5. By adjusting the support height of the adjustment stand 2, It is characterized in that the suction depth H at which the upper edge 20 of the funnel body 4A is submerged from the water surface L can be adjusted.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to an aeration device used for aeration treatment in sand settling basins and sewage treatment tanks. It is something.

0002

[Conventional technology]

Aeration equipment is usually applied to purify water stored in reservoirs such as settling ponds. There is.

0003 This aeration device is available in various structures, but among them, underwater Pressurized air is supplied to an agitator to mix gas and liquid, and the impeller of an underwater aerator is Storage occurs by sucking the air above the water surface into the negative pressure side and mixing gas and liquid. A well-known example is one that prevents water from spoiling.

0004

[Problem that the idea aims to solve]

However, the above conventional aeration equipment requires a blower to supply pressurized air. This not only increases equipment and operating costs, but also makes it difficult to secure installation space. However, the latter has a weaker gas-liquid stirring power compared to other stirrers. There was a problem that it could not be applied to large-capacity reservoirs, etc.

[0005] In view of these conventional circumstances, this invention can achieve large-scale operation without using a blower or the like. By creating a structure that allows air to be easily supplied into the stored water, an effective aeration treatment for the stored water can be achieved. The purpose of this invention is to provide an aeration device that allows for efficient operation.

[0006]

[Means to solve the problem]

The aeration device of this invention is installed underwater on an adjustment stand installed at the bottom of a pond, such as a reservoir. A stirrer is supported, and this submersible stirrer has an inverted conical funnel at the top end and a mixer at the bottom end. The mixing chamber is connected to the mixing chamber, and a diffusion cylinder is connected to the lower end of this mixing chamber, By adjusting the support height using the stand, the upper edge of the funnel can be submerged from the water surface. The suction depth can be adjusted.

[0007]

[Effect]

In the above structure, the accumulated water near the water surface is collected by a preset suction depth. It becomes a suction vortex and flows into the funnel. The atmosphere above the water surface attracted by this suction vortex is , the air bubbles are mixed into the stored water, and these air bubbles are crushed by the underwater agitator. The gas-liquid mixture is repeated over a long path from the air to the mixing chamber to the diffusion tube. As a result, the aeration treatment of the stored water will proceed quickly.

[0008]

【Example】

An embodiment of this invention will be described below with reference to the drawings.

[0009] The aeration device 1 shown in FIG. It is for making the adjustment stand 2, underwater stirrer 3, funnel body 4A, mixing It is constructed with a chamber 5 and a diffusion tube 6 as main parts.

0010 That is, the underwater agitator 3 is supported by the adjustment stand 2 installed in the underground part B. , this underwater stirrer 3 has an inverted conical funnel 4A at the upper end and a mixing chamber 5 at the lower end. At the same time, an expansion blade 6 is connected to the lower end of the mixing chamber 5.

[0011] The adjustment stand 2 is made up of a base 7 and a plurality of (for example, four) support tubes 8. A fixed stand 9, an elevating plate 10, and a plurality of elevating plates that penetrate the elevating plate 10 in the vertical direction. It consists of a movable stand 12 consisting of four supporting columns 11, and the base 7 is It is fixed to the bottom part B with bolts. The base 7 and the elevator 10 have a planar shape. Formed into a rectangle or a circle.

0012 Further, each of the support tubes 8 has positioning holes 1 that intersect with each other in the diametrical direction of the upper end. 3 are spaced apart in the axial direction, while the lower half of the support column 11 is connected to the support tube 8. This lower half is fitted with a positioning hole 13 in a slidable manner. A plurality of adjustment holes 14 are formed at the same height.

[0013] A known vertical mixer is used as the underwater stirrer 3, and the lower end of the underwater stirrer 3 The upper end of the joint room 5 is connected to sandwich the opening 10a of the elevator board 10.

[0014] When the funnel body 4A is connected with its central part adapted to the impeller 16 of the underwater agitator 3, In both cases, the middle portion is supported by the upper end of the support column 11 via a bracket 17. Reference numeral 18 denotes a plurality of guide vanes (for example, twelve guide vanes) for guiding the inflow direction of the stored water W. ) are provided at equal intervals on the outer periphery of the funnel body 4A.

[0015] The diffusion cylinder 6 spreads the stored water W pushed out from the mixing chamber 5 radially in the horizontal direction. A plurality of guide partition walls 19 (for example, twelve) are provided inside. ing.

[0016] In this way, the submersible agitator 3, the mixing chamber 5, and the diffusion tube 6, as well as the elevator plate 10 and and a funnel body 4A fixed to the support column 11 of the adjustment stand 2 via the bracket 17. The suction depth H when the upper edge 20 of the funnel body 4A is submerged from the water surface L is determined by the adjustment stand. Select one of the adjustment holes 14 of the pin 2, and align the pin 1 with the positioning hole 13. Adjustment is possible by fixing at 5.

[0017] Next, the operation of the above embodiment will be explained. First, the suction depth H of the upper edge 20 of the funnel body 4A is adjusted to the discharge water volume of the submersible stirrer 3. On the other hand, adjust the adjustment stand 2 so that the amount of supplied water flowing into the funnel body 4 is slightly reduced. Set by adjusting.

[0018] When the underwater agitator 3 is driven, the stored water W discharged from the underwater agitator 3 is in a pressurized state. The water is ejected radially from the diffusion cylinder 6 toward the side wall of the reservoir P through the mixing chamber 5. As a result, active circulation occurs inside the reservoir P.

[0019] At this time, the stored water W near the water surface L supplied from the funnel body 4A to the underwater agitator 3 is , a suction vortex is generated inside the funnel 4A because the amount of water discharged from the underwater agitator 3 cannot be filled. do. The air above the water surface L is attracted by this suction vortex and turns into bubbles, which then become underwater. The stored water W is finely crushed by the impeller 16 of the stirrer 3 and flows through a long path to the diffusion tube 6. Since sufficient air bubbles are mixed with the air, efficient aeration is achieved.

[0020] In addition, instead of the above-mentioned funnel body 4A, a funnel body 4B shown in FIG. 2 can also be applied. Wear. That is, the inside of this funnel body 4B is formed into a circular staircase 20. Moreover, the air attracted by the suction vortex has to pass through the circular staircase before entering the underwater agitator 3. A mixing action with the stored water W falling down 20 is performed. Therefore, aeration in this case The action is more active than when funnel 4A is applied.

[0021]

[Effect of the idea]

The aeration device of this invention is installed underwater on an adjustment stand installed at the bottom of a pond, such as a reservoir. A stirrer is supported, and this submersible stirrer has an inverted conical funnel at the top end and a mixer at the bottom end. The mixing chamber is connected to the mixing chamber, and a diffusion cylinder is connected to the lower end of this mixing chamber, By adjusting the support height using the stand, the upper edge of the funnel can be submerged from the water surface. Since the suction depth is adjustable, the atmosphere above the water surface is Fine bubbles are generated by the crushing of the underwater agitator, which is attracted by the suction vortex generated by the funnel. Is there enough gas-liquid mixing in the long path from the underwater stirrer to the diffusion tube? This significantly improves aeration efficiency. In addition, a blower for supplying air like conventional The excellent advantage is that equipment costs and operating costs are significantly reduced as there is no need for There is.

[Brief explanation of drawings]

FIG. 1 is a front view showing an installed state of an aeration device.

FIG. 2 is a partially sectional front view of another embodiment of the funnel body.

[Explanation of symbols]

1 Aeration device 2 Adjustment stand 3 Underwater stirrer 4A, 4B Funnel body 5 Mixing chamber 6 Diffusion tube 20 Upper edge 21 Circular staircase H Suction depth L water surface B Pond bottom W Retained water P Reservoir

Claims (2)

[Scope of utility model registration request] [Claim 1] A submersible agitator is supported on an adjustment stand installed at the bottom of a pond such as a reservoir, and this submersible agitator has an inverted conical funnel connected to its upper end and a mixing chamber to its lower end. , a diffusion cylinder is connected to the lower end of this mixing chamber,
An aeration device characterized in that the suction depth at which the upper end edge of the funnel is submerged from the water surface can be adjusted by adjusting the support height by the adjustment stand. 2. The aeration device according to claim 1, wherein the inside of the funnel is formed into a circular staircase.