Stirring device for defoaming in sewage treatment

Abstract

A defoaming stirring device for sewage treatment relates to the technical field of sewage treatment devices and comprises a floating frame, a stirring shaft is vertically and rotatably arranged on the floating frame, and tangential flow stirring blades and mixing stirring blades are parallelly arranged on the stirring shaft from top to bottom. A negative pressure liquid extractor which is arranged in a floating manner is arranged on the stirring shaft above the tangential flow stirring blades in a vertical sliding manner; and a plurality of flow guide plates which are vertically arranged are arranged in a surrounding manner in an area where the mixing stirring blades are located on the floating frame. The device solves the problems that the height of the position of a defoaming device in the prior art needs to be manually adjusted, and the defoaming device cannot automatically adapt to the height of the sewage liquid level, so that the generated foam eliminating efficiency is low, and the sewage treatment effluent quality is influenced; the problems that in the using process of an existing defoaming technology, an operator puts a defoaming agent into sewage, and the defoaming agent cannot be fully contacted and exchanged with the sewage, so that the foam eliminating efficiency is low, and the sewage treatment efficiency is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment devices, in particular to a stirring device for sewage treatment and defoaming. Background Art

[0002] In the wastewater treatment process, defoaming technology is crucial for maintaining normal operation and ensuring effluent quality. In conventional wastewater treatment processes, severe foaming often occurs in aeration tanks, particularly when treating industrial wastewater. Foam generation can severely impact the operation of the wastewater treatment process, leading to operational difficulties and potentially polluting the environment. Causes of foam include excessive organic matter content in the water, excessive detergents or surfactants in the influent, and the expansion of filamentous bacteria. These factors not only lead to excessive foam generation but also reduce the oxygenation efficiency of the aeration tank, complicating operation and control, and impacting effluent quality.

[0003] The prior art discloses a patent with publication number CN208684500U, which includes a tank body, a motor, a stirring shaft, a stirring blade and a defoaming paddle; the stirring shaft is located in the tank body and is coaxial with the tank body; the motor is fixedly connected to the top of the tank body, and the rotating shaft of the motor is fixedly connected to the stirring shaft; the stirring blade and the defoaming paddle are both arranged on the stirring shaft and rotate with the stirring shaft, and the defoaming paddle is located above the stirring blade; the defoaming paddle is block-shaped, and a number of defoaming holes penetrating the defoaming paddle are opened on the defoaming paddle, and the extension direction of the defoaming hole is perpendicular to the radial direction of the stirring shaft; the defoaming paddle passes through the wastewater surface in the tank body, and the bubbles generated on the wastewater surface enter the defoaming holes, are squeezed and broken by the inner wall of the defoaming holes, thereby playing a defoaming role and reducing the amount of defoaming agent used.

[0004] As the existing devices including the above patents are used, the shortcomings of the technology are gradually exposed, mainly in the following aspects:

[0005] First, the height of the defoaming device needs to be adjusted manually and cannot automatically adapt to the height of the sewage level, resulting in low efficiency in eliminating the foam and affecting the water quality of the sewage treatment effluent.

[0006] Second, during the use of existing defoaming technology, the operator puts the defoaming agent into the sewage. Since the defoaming agent cannot fully contact and exchange with the sewage, the foam elimination efficiency is low, which affects the sewage treatment efficiency.

[0007] In summary, the existing technology has obvious inconveniences and defects in actual use, so it is necessary to improve it. Utility Model Content

[0008] In response to the defects in the existing technology, the utility model solves the problem that the position of the defoaming device in the traditional technology needs to be manually adjusted in height and cannot automatically adapt to the height of the sewage liquid level, resulting in low foam elimination efficiency and affecting the water quality of the sewage treatment effluent; and during the use of the existing defoaming technology, the operator puts the defoaming agent into the sewage, and since the defoaming agent cannot fully contact and exchange with the sewage, the foam elimination efficiency is low, affecting the sewage treatment efficiency.

[0009] In order to solve the above problems, the present invention provides the following technical solutions:

[0010] A stirring device for sewage treatment and defoaming, comprising a floating frame, a stirring shaft vertically rotating on the floating frame, and tangential flow stirring blades and mixing stirring blades arranged in parallel from top to bottom on the stirring shaft.

[0011] The stirring shaft is located above the tangential flow stirring blade and slides vertically with a floating negative pressure liquid extractor.

[0012] A plurality of vertically arranged guide plates are arranged around the area where the mixing and stirring blades are located on the floating frame.

[0013] As an optimized solution, the floating frame includes a fixed plate, a plurality of the guide plates are fixedly connected to the outer edge of the fixed plate, and a fixed floating ring is commonly sheathed between the outer walls of the plurality of the guide plates.

[0014] As an optimized solution, the upper surface of the fixed plate is surrounded by several inverted L-shaped plates, the transverse sections of the several L-shaped plates are fixedly connected, the upper end of the L-shaped plate is fixedly connected to a drive motor, and the output shaft of the drive motor is fixedly connected to the stirring shaft.

[0015] As an optimized solution, the inner ring of the fixed disk is detachably connected to a cylinder, and the lower end of the cylinder is fixedly connected to a baffle, which is located in the area between the tangential flow stirring blades and the mixing stirring blades.

[0016] As an optimized solution, a matching stepped groove is provided between the upper end of the cylinder and the inner ring of the fixed disk, and they are connected by bolts.

[0017] As an optimized solution, vertically arranged guide rods are fixedly connected in parallel to the lower surface of the L-shaped plate, and the negative pressure liquid extractor is provided with guide holes matching the guide rods.

[0018] As an optimized solution, a plurality of bubble suction channels are provided on the peripheral wall of the negative pressure liquid extractor, a negative pressure cavity connected to the plurality of bubble suction channels is provided inside the negative pressure liquid extractor, a hose connected to the negative pressure cavity is fixedly connected to the upper end of the negative pressure liquid extractor, and the other end of the hose is connected to a negative pressure source.

[0019] As an optimized solution, the negative pressure liquid extractor is provided with an avoidance hole for avoiding the stirring shaft.

[0020] As an optimized solution, the mixing and stirring blade includes a sleeve mounted on the stirring shaft, a plurality of arc blades are arranged on the peripheral wall of the sleeve, and a locking knob is threadedly connected to the area of the sleeve between adjacent arc blades, and the end of the locking knob is against the stirring shaft.

[0021] As an optimized solution, a baffle is fixedly connected to the lower end of the guide rod.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] When the device is placed in water, the pump floats on the liquid surface because its density is lower than that of the liquid. As the liquid surface fluctuates, the pump height changes accordingly, thereby extracting the foam on the liquid surface. This overcomes the operator's manual height adjustment operation in traditional technology. When the pump floats on the liquid surface, its density is lower than that of the liquid but higher than that of the foam. When the defoaming stirring device is placed in the liquid, the pump will always be at the appropriate height for foam elimination.

[0024] Through tangential flow stirring, a vortex is formed on the liquid surface, which accelerates the foam generated in the sewage pool to gather towards the center of the vortex. As the liquid level at the vortex drops, the pump will drop accordingly, and then the foam entering the vortex will be sucked out, thereby improving the extraction efficiency of the foam by the liquid surface floating pump;

[0025] A floating ring is set on the outside of the defoaming device to facilitate quick placement in the working environment. The number of devices can be increased or decreased according to the actual amount of foam in the pool, making it flexible and convenient to use.

[0026] The device has a simple structure, and the separation screen is installed on the fixed plate through connecting bolts, which is easy to install and disassemble and easy to clean;

[0027] It has a wide range of uses. Due to its easy installation and disassembly, the stirring modes can be used alone or in combination to achieve the desired stirring effect according to different usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0029] Figure 1 It is a structural diagram of the utility model;

[0030] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;

[0031] Figure 3 Schematic diagram of the usage scenario of the present utility model.

[0032] In the figure: 1-driving motor, 2-guide rod, 3-hose, 4-negative pressure pump, 5-sewage foam, 6-bolt, 7-fixing plate, 8-floating ring, 9-mixing and stirring blade, 10-cylinder, 11-L-shaped plate, 12-stirring shaft, 13-guide plate, 14-blocking net, 15-tangential flow stirring blade, 16-sewage tank; 17-defoaming device. DETAILED DESCRIPTION

[0033] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0034] like Figures 1 to 3 As shown, a stirring device for sewage treatment and defoaming comprises a floating frame, on which a stirring shaft 12 is vertically rotated, and on which tangential flow stirring blades 15 and mixing stirring blades 9 are arranged in parallel from top to bottom.

[0035] The stirring shaft 12 is located above the tangential flow stirring blade 15 and slides vertically with a floating negative pressure pump 4. The density of the negative pressure pump 4 is lower than the density of the liquid. When the device is placed in the liquid, the height of the negative pressure pump 44 is always at the optimal height.

[0036] A plurality of vertically arranged guide plates 13 are provided on the floating frame in the area where the mixing and stirring blades 9 are located.

[0037] The floating frame includes a fixed plate 7 , a plurality of guide plates 13 are fixedly connected to the outer edge of the fixed plate 7 , and a fixed floating ring 8 is commonly sheathed between the outer walls of the plurality of guide plates 13 .

[0038] The upper surface of the fixed plate 7 is surrounded by a plurality of inverted L-shaped plates 11 , the transverse sections of the plurality of L-shaped plates 11 are fixedly connected, the upper end of the L-shaped plate 11 is fixedly connected to the drive motor 1 , and the output shaft of the drive motor 1 is fixedly connected to the stirring shaft 12 .

[0039] The inner ring of the fixed disk 7 is detachably connected to the cylinder 10 , and the lower end of the cylinder 10 is fixedly connected to a baffle 14 . The baffle 14 is located in the area between the tangential flow stirring blades 15 and the mixing stirring blades 9 .

[0040] A matching stepped groove is provided between the upper end of the cylinder 10 and the inner ring of the fixed plate 7 , and they are connected by bolts 6 .

[0041] The lower surface of the L-shaped plate 11 is fixedly connected in parallel with vertically arranged guide rods 2 , and the negative pressure liquid extractor 4 is provided with guide holes matching the guide rods 2 .

[0042] Several bubble suction channels are provided on the peripheral wall of the negative pressure liquid extractor 4, and a negative pressure cavity connected to the several bubble suction channels is provided inside the negative pressure liquid extractor 4. A hose 3 connected to the negative pressure cavity is fixedly connected to the upper end of the negative pressure liquid extractor 4, and the other end of the hose 3 is connected to the negative pressure source.

[0043] The negative pressure liquid extractor 4 is provided with an escape hole for escaping the stirring shaft 12 .

[0044] The mixing blade 9 includes a sleeve sleeved on the stirring shaft 12, and a plurality of arc blades are arranged around the peripheral wall of the sleeve. The area of the sleeve between adjacent arc blades is threadedly connected with a locking knob, and the end of the locking knob is against the stirring shaft 12.

[0045] The lower end of the guide rod 2 is fixed with a baffle.

[0046] The working principle of this device is:

[0047] When the device is placed in water, the pump floats on the liquid surface because its density is lower than that of the liquid. As the liquid surface fluctuates, the height of the pump changes accordingly, thereby extracting the sewage foam 5 on the liquid surface, overcoming the operator's manual height adjustment operation in traditional technology. When the pump floats on the liquid surface, its density is lower than that of the liquid but higher than that of the foam. When the defoaming stirring device is placed in the liquid, the pump will always be at the appropriate height for foam elimination.

[0048] The tangential flow stirs the liquid surface to form a vortex, which accelerates the foam generated in the sewage pool 16 to gather towards the center of the vortex. As the liquid level at the vortex drops, the pump will drop accordingly, and then the foam entering the vortex will be sucked out, thereby improving the efficiency of the liquid surface floating pump in extracting foam.

[0049] A floating ring 8 is provided outside the defoaming device 17 to facilitate quick placement in the working environment. The number of devices can be increased or decreased according to the actual amount of foam in the pool, making it flexible and convenient to use.

[0050] The mixing blades 9 rotate to stir the sewage, thereby increasing the uniformity of mixing the sewage and the defoaming agent. In addition, the guide plates 13 are provided to divert the water flow generated by the rotation of the mixing blades 9, thereby increasing the uniformity of mixing the defoaming agent and the sewage.

[0051] The device has a simple structure. The separation screen 14 is mounted on the fixed plate 7 through the connecting bolts 6. It is easy to install and disassemble and is convenient for cleaning.

[0052] It has a wide range of uses. Due to its easy installation and disassembly, the stirring modes can be used alone or in combination to achieve the desired stirring effect according to different usage scenarios.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A stirring device for defoaming in sewage treatment, characterized by: The invention comprises a floating frame, on which a stirring shaft (12) is vertically rotated, and on which tangential flow stirring blades (15) and mixing stirring blades (9) are arranged in parallel from top to bottom. The stirring shaft (12) is located above the tangential flow stirring blade (15) and is provided with a floating negative pressure liquid extractor (4) which slides vertically. A plurality of vertically arranged guide plates (13) are provided on the floating frame in an area where the mixing and stirring blades (9) are located.

2. The stirring device for sewage treatment defoaming according to claim 1, characterized in that: The floating frame comprises a fixed plate (7), a plurality of guide plates (13) are fixedly connected to the outer edge of the fixed plate (7), and a fixed floating ring (8) is commonly sheathed between the outer walls of the plurality of guide plates (13).

3. The stirring device for sewage treatment defoaming according to claim 2, characterized in that: The upper surface of the fixed plate (7) is surrounded by a plurality of inverted L-shaped plates (11), the transverse sections of the plurality of L-shaped plates (11) are fixedly connected, the upper end of the L-shaped plate (11) is fixedly connected to a drive motor (1), and the output shaft of the drive motor (1) is fixedly connected to the stirring shaft (12).

4. The stirring device for defoaming in sewage treatment according to claim 3, characterized in that: The inner ring of the fixed disk (7) is detachably connected to a cylinder (10), and the lower end of the cylinder (10) is fixedly connected to a baffle (14), and the baffle (14) is located in the area between the tangential flow stirring blade (15) and the mixing stirring blade (9).

5. The stirring device for sewage treatment defoaming according to claim 4, characterized in that: A matching stepped groove is provided between the upper end of the cylinder (10) and the inner ring of the fixed disk (7), and the two are connected by bolts (6).

6. The stirring device for defoaming in sewage treatment according to claim 5, characterized in that: The lower surface of the L-shaped plate (11) is fixedly connected in parallel with vertically arranged guide rods (2), and the negative pressure liquid extractor (4) is provided with a guide hole matching the guide rods (2).

7. The stirring device for sewage treatment defoaming according to claim 6, characterized in that: A plurality of bubble suction channels are provided on the peripheral wall of the negative pressure liquid extractor (4), a negative pressure cavity connected to the plurality of bubble suction channels is provided inside the negative pressure liquid extractor (4), a hose (3) connected to the negative pressure cavity is fixedly connected to the upper end of the negative pressure liquid extractor (4), and the other end of the hose (3) is connected to a negative pressure source.

8. The stirring device for sewage treatment and defoaming according to claim 7, characterized in that: The negative pressure liquid extractor (4) is provided with an escape hole for evading the stirring shaft (12).

9. The stirring device for defoaming in sewage treatment according to claim 8, characterized in that: The mixing and stirring blade (9) comprises a sleeve sleeved on the stirring shaft (12), a plurality of arc blades are arranged on the peripheral wall of the sleeve, and a locking knob is threadedly connected to the region of the sleeve between adjacent arc blades, and the end of the locking knob abuts against the stirring shaft (12).

10. The stirring device for defoaming in sewage treatment according to claim 9, characterized in that: The lower end of the guide rod (2) is fixedly connected with a baffle.

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