Efficient vortex air flotation device

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to an efficient vortex air flotation device. An efficient vortex air flotation device comprises an unpowered reactor, a vortex mud-water separator, a microbubble generator and an automatic mud discharger, the unpowered reactor is used for sewage dosing reaction, the vortex mud-water separator is communicated with the unpowered reactor, and the microbubble generator is communicated with the unpowered reactor. The vortex mud-water separator is provided with a flocculating agent adding port for adding a flocculating agent, and the microbubble generator is communicated with the vortex mud-water separator and enables microbubbles to be mixed with a mud-water mixture in the vortex mud-water separator; and the automatic sludge discharging device is used for discharging sludge separated from clear water in the vortex mud-water separator out of the vortex mud-water separator. The device has the advantages that movable parts are reduced, the cost is reduced, and normal operation and the service life of equipment are guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of wastewater treatment, and in particular to a high-efficiency vortex flotation device. Background Technology

[0002] Air flotation, a device that uses the buoyancy of air bubbles to separate suspended solids from clean water, has been widely used in the wastewater treatment industry. It plays an important role, especially in industrial wastewater generated by industries such as printing and dyeing, pharmaceuticals, chemicals, steel, petroleum, coal, and metallurgy. Pollutants in the wastewater react with the reagents to form flocs. After the flocs adsorb microbubbles, their overall density is lighter than water, so they float to the surface and separate from the clean water.

[0003] With the continuous improvement of environmental protection requirements and the expansion of sewage treatment scale, higher demands are being placed on the performance and efficiency of air flotation equipment. High-efficiency air flotation equipment can not only improve the effect of sewage treatment, but also reduce operating costs and reduce the impact on the environment. In industrial production, the timeliness and effectiveness of sewage treatment are crucial to ensuring the normal operation of production and reducing environmental pollution. The development of air flotation technology has provided an effective means to solve these problems, enabling industrial wastewater to be treated and discharged more rationally.

[0004] In existing dissolved air flotation (DAF) technologies, common equipment types for achieving sludge-water separation and scum removal include disc-type shallow DAF and rectangular horizontal flow DAF. Disc-type shallow DAF typically utilizes the rotation of a disc to generate the flotation effect, controlling the flotation process by adjusting the disc's rotation speed and structural parameters. Rectangular horizontal flow DAF, on the other hand, allows wastewater to flow horizontally in a rectangular tank, adding air bubbles and chemicals during the flow, causing suspended solids to adsorb the air bubbles and float to the surface. These DAF systems generally require numerous moving parts to complete each operational step.

[0005] However, existing flotation equipment requires numerous moving parts to achieve sludge-water separation and scum removal, resulting in high maintenance costs. This is especially true when the treated medium is highly corrosive, significantly increasing the likelihood of part failure. Furthermore, using corrosion-resistant materials often fails to meet the structural strength requirements of these moving parts, thus affecting the normal operation and service life of the equipment. Utility Model Content

[0006] In order to reduce moving parts, reduce costs, and ensure the normal operation and service life of the equipment, this application provides a high-efficiency vortex air flotation device.

[0007] This application provides a high-efficiency vortex flotation device, which adopts the following technical solution: it includes a non-powered reactor, a vortex sludge-water separator, a microbubble generator, and an automatic sludge discharger. The non-powered reactor is used for chemical dosing of wastewater. The vortex sludge-water separator is connected to the non-powered reactor. The vortex sludge-water separator is provided with a flocculant dosing port for adding flocculant. The microbubble generator is connected to the vortex sludge-water separator and mixes the microbubbles with the sludge-water mixture in the vortex sludge-water separator. The automatic sludge discharger is used to discharge the sludge separated from the clear water in the vortex sludge-water separator.

[0008] By adopting the above technical solution, after the wastewater is fully reacted in the non-powered reactor, it is mixed with flocculant and microbubbles. The flocculant binds the fine suspended solids into larger suspended particles and adsorbs a large number of microbubbles. The suspended solids float to the surface under the action of the adsorbed bubbles and are discharged from the vortex sludge separator through the automatic sludge discharger. This reduces moving parts, reduces costs, and ensures the normal operation and service life of the equipment.

[0009] Preferably, the non-powered reactor is connected to a sewage inlet, an outlet, and a chemical dosing port. The sewage inlet and the outlet are arranged tangentially along the non-powered reactor and are located above and below the non-powered reactor, respectively. The chemical dosing port is located on one side of the sewage inlet.

[0010] By adopting the above technical solution, the wastewater inlet is structurally characterized by being tangentially positioned along the non-powered reactor and located at the top of the non-powered reactor. This tangential positioning allows the incoming wastewater to rotate within the non-powered reactor at a certain flow rate, forming an annular flow pattern within the non-powered reactor. The dosing port is located on one side of the wastewater inlet, facilitating the entry of chemicals into the non-powered reactor along with the wastewater, allowing for thorough mixing and reaction within the reactor.

[0011] Preferably, the vortex sludge separator is provided with an inlet and a clean water outlet. The inlet is connected to the outlet and extends to the middle of the bottom wall of the vortex sludge separator. The clean water outlet extends to the side wall of the vortex sludge separator. The vortex sludge separator is provided with annularly arranged inclined guide plates. The annularly arranged inclined guide plates are coaxially arranged with the vortex sludge separator at the bottom of the vortex sludge separator and surround the inlet.

[0012] By adopting the above technical solution, the mud-water mixture is evenly distributed throughout the vortex mud-water separator under the action of the annularly arranged inclined guide plates. The mud floats to the surface under the action of adsorbed air bubbles, and the clear water flows out from the bottom outlet.

[0013] Preferably, the non-powered reactor and the vortex sludge separator are connected by a pipeline, one end of which is connected to the outlet and the other end of which is connected to the inlet. The flocculant dosing port and the microbubble generator are connected to the pipeline.

[0014] By adopting the above technical solution, the flocculant dosing port and the microbubble generator are connected to the pipeline, which allows the flocculant, microbubbles and mud-water to be fully mixed before the mud-water mixture enters the vortex mud-water separator, creating better conditions for subsequent separation.

[0015] Preferably, the automatic sludge discharge device includes a scum collection cone, which is located in the upper part of the vortex sludge separator. The scum collection cone is arranged circumferentially along the inner wall of the vortex sludge separator. A suspended matter collection space is formed between the scum collection cone and the inner wall of the vortex sludge separator. A sludge discharge port is provided on the side wall of the vortex sludge separator, and the sludge discharge port is connected to the suspended matter collection space.

[0016] By adopting the above technical solution, when the liquid level in the vortex sludge separator is slightly lower than the slag discharge port of the slag collection cone, the slag is suspended above the liquid surface in the vortex sludge separator; when the liquid level in the vortex sludge separator is slightly higher than the slag discharge port of the slag collection cone, the slag can be discharged from the sludge discharge port by gravity.

[0017] Preferably, the automatic sludge discharge device further includes an adjustable weir plate and an automatic valve, the adjustable weir plate and the automatic valve being connected in parallel to the clean water outlet, and the adjustable weir plate and the automatic valve being used to adjust the liquid level height inside the vortex sludge separator.

[0018] By adopting the above technical solution, when the automatic valve is open, the liquid level in the vortex sludge separator is slightly lower than the slag discharge port edge of the slag collection cone; when the automatic valve is closed, the liquid level in the vortex sludge separator is slightly higher than the slag discharge port edge of the slag collection cone, and the slag can be discharged by gravity. The amount of sludge discharged can also be adjusted by adjusting the automatic valve.

[0019] Preferably, the microbubble generator includes a bubble mixing tank and a reflux pump. One end of the reflux pump is connected to the clean water outlet of the vortex mud-water separator, and the inlet of the reflux pump is provided with an air intake. The other end of the reflux pump is connected to the bubble mixing tank, which is connected to the pipeline.

[0020] By adopting the above technical solution, the inlet of the reflux pump has an air intake port. The air intake enters the mixing tank under the action of the reflux pump and forms microbubbles by strong shearing with water. The bubble water is then sent to the inlet of the vortex mud-water separator to mix with the mud-water mixture.

[0021] Preferably, the non-powered reactor is further provided with a guide plate, which is located at the center of the bottom of the non-powered reactor and is arranged radially along the non-powered reactor. Multiple guide plates are provided and are arranged at equal angular intervals along the circumference of the non-powered reactor.

[0022] By adopting the above technical solution, multiple guide plates are set at equal angles along the circumference of the non-powered reactor, so that the sewage and the reagents are fully mixed in the non-powered reactor, thereby improving the reaction efficiency of the sewage and the reagents.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. After the wastewater is fully reacted in the non-powered reactor, it is mixed with flocculant and microbubbles. The flocculant binds the fine suspended solids into larger suspended particles and adsorbs a large number of microbubbles. The suspended solids float to the surface under the action of the adsorbed bubbles and are discharged from the vortex sludge separator through the automatic sludge discharger. This reduces moving parts, reduces costs, and ensures the normal operation and service life of the equipment.

[0025] 2. When the automatic valve is open, the liquid level in the vortex sludge separator is slightly lower than the slag discharge port of the slag collection cone; when the automatic valve is closed, the liquid level in the vortex sludge separator is slightly higher than the slag discharge port of the slag collection cone, and the slag can be discharged by gravity. The amount of sludge discharged can also be adjusted by adjusting the automatic valve. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this application;

[0027] Figure 2 This is a schematic diagram of the non-powered reactor of this application.

[0028] Explanation of reference numerals in the attached drawings: 110, Non-powered reactor; 111, Wastewater inlet; 112, Outlet; 113, Baffle plate; 120, Vortex sludge separator; 121, Inlet; 122, Clear water outlet; 123, Annular inclined guide plate; 124, Pipeline; 125, Flocculant dosing port; 126, Sludge discharge port; 130, Microbubble generator; 131, Bubble mixing tank; 132, Return pump; 140, Automatic sludge discharger; 141, Scum collection cone; 142, Adjustable weir plate; 143, Automatic valve; 144, Suspended solids collection space. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] This application discloses a high-efficiency vortex air flotation device, which reduces moving parts, reduces costs, and ensures normal operation and service life of the equipment.

[0031] refer to Figure 1 and Figure 2 A high-efficiency vortex flotation device includes a non-powered reactor 110, a vortex sludge separator 120, a microbubble generator 130, and an automatic sludge discharger 140. The non-powered reactor 110 is used for chemical dosing of wastewater. The vortex sludge separator 120 is connected to the non-powered reactor 110 and is equipped with a flocculant inlet 125 for adding flocculant. The microbubble generator 130 is connected to the vortex sludge separator 120 and allows the microbubbles and sludge in the vortex sludge separator 120 to interact. The water mixture is mixed, and the automatic sludge discharger 140 is used to discharge the sludge separated from the clear water in the vortex sludge separator 120. Through the coordinated work of various components, the non-powered reactor 110 first performs preliminary mixing of sewage and reagents, the microbubble generator 130 provides microbubbles, the vortex sludge separator 120 completes the sludge-water separation, and the automatic sludge discharger 140 discharges the sludge, achieving the effect of efficient sludge-water separation, reducing moving parts, reducing costs, and ensuring the normal operation and service life of the equipment.

[0032] Specifically, the non-powered reactor 110 is connected to a sewage inlet 111, an outlet 112, and a dosing port. In this embodiment, the non-powered reactor 110 is a cylinder, and the inlet and outlet 112 are located at the tangent of the circular cross-section, respectively at the top and bottom of the cylinder. The water inlet rotates inside the cylinder at a certain flow rate. The sewage inlet 111 and outlet 112 are arranged tangentially along the non-powered reactor 110 and are located at the top and bottom of the non-powered reactor 110, respectively. The dosing port is located on one side of the sewage inlet 111, so that the reagent can enter the non-powered reactor 110 along with the sewage and be mixed and reacted fully in the non-powered reactor 110.

[0033] The non-powered reactor 110 is also equipped with a guide plate 113. The guide plate 113 is located at the center of the bottom of the non-powered reactor 110 and is arranged radially along the non-powered reactor 110. There are multiple guide plates 113, which are arranged at equal angles along the circumference of the non-powered reactor 110. The guide plate 113 is generally flat and can be made of corrosion-resistant materials such as stainless steel. The guide plate 113 can also be replaced with an arc-shaped guide plate 113 to enhance the mixing effect. These guide plates 113 enable the wastewater and the reagent to be fully mixed in the non-powered reactor 110, thereby improving the reaction efficiency of the wastewater and the reagent.

[0034] Specifically, the vortex sludge separator 120 is provided with an inlet 121 and a clean water outlet 122. The inlet 121 is used to connect with the outlet 112 of the non-powered reactor 110 and is connected to the middle of the bottom wall of the vortex sludge separator 120, so that the sludge-water mixture can enter the separator evenly. The clean water outlet 122 is connected to the side wall of the vortex sludge separator 120 to facilitate the flow of clean water.

[0035] The vortex slurry separator 120 is equipped with annularly arranged inclined guide plates 123. These guide plates 123 are coaxially positioned at the bottom of the vortex slurry separator 120, surrounding the inlet 121. The annularly arranged inclined guide plates 123 are generally made of metal and are arranged at a certain angle to guide the slurry mixture to form a vortex. Under the action of the annularly arranged inclined guide plates 123, the slurry mixture is evenly distributed throughout the vortex slurry separator 120.

[0036] The non-powered reactor 110 and the vortex sludge separator 120 are connected by a pipeline 124. One end of the pipeline 124 is connected to the outlet 112, and the other end is connected to the inlet 121. The flocculant dosing port 125 and the microbubble generator 130 are connected to the pipeline 124. The microbubble generator is located between the clear water outlet and the inlet 121 of the vortex sludge separator 120. The microbubble generator 130 includes a bubble mixing tank 131 and a reflux pump 132. One end of the reflux pump 132 is connected to the clear water outlet 122 of the vortex sludge separator 120, and the inlet of the reflux pump 132 is connected to the outlet 122 of the vortex sludge separator 120. An air intake is provided. Air, drawn in by the return pump 132, enters the mixing tank and undergoes intense shearing with water to form microbubbles. This bubble-filled water is then sent to the inlet of the vortex slurry separator 120 to mix with the slurry mixture. The other end of the vortex slurry separator is connected to a bubble mixing tank 131, which is connected to pipeline 124. By adding flocculant, the flocs and microbubbles are adsorbed together, forming larger bubble-containing flocs. This allows for thorough mixing of the flocculant, microbubbles, and slurry before the slurry mixture enters the vortex slurry separator 120, creating better conditions for rapid slurry separation in the vortex slurry separator 120. The flow rate of the return pump 132 is 20% to 30% of the inlet water flow rate.

[0037] The automatic sludge discharge device 140 includes a scum collection cone 141, an adjustable weir plate 142, and an automatic valve 143. The scum collection cone 141 is located in the upper part of the vortex sludge separator 120 and is arranged circumferentially along the inner wall of the vortex sludge separator 120. A suspended solids collection space 144 is formed between the scum collection cone 141 and the inner wall of the vortex sludge separator 120. A sludge discharge port 126 is provided on the side wall of the vortex sludge separator 120, and the sludge discharge port 126 is connected to the suspended solids collection space 144. When the liquid level in the vortex sludge separator 120 is slightly lower than the slag discharge port edge of the slag collection cone 141, the slag is suspended above the liquid surface in the vortex sludge separator 120; when the liquid level in the vortex sludge separator 120 is slightly higher than the slag discharge port edge of the slag collection cone 141, the slag can be discharged from the sludge discharge port 126 by gravity; the adjustable weir plate 142 and the automatic valve 143 are connected in parallel to the clear water outlet 122, and the adjustable weir plate 142 and the automatic valve 143 are used to adjust the liquid level height in the vortex sludge separator 120.

[0038] When the automatic valve 143 is open, the liquid level in the vortex mud-water separator 120 is slightly lower than the slag discharge port edge of the slag collection cone 141; when the automatic valve 143 is closed, the liquid level in the vortex mud-water separator 120 is slightly higher than the slag discharge port edge of the slag collection cone 141, and the slag can be discharged by gravity. The amount of sludge discharged can also be adjusted by adjusting the automatic valve 143.

[0039] The implementation principle of the high-efficiency vortex flotation device in this application embodiment is as follows: sewage enters from the inlet 121 of the non-powered reactor 110, and coagulant is added at the dosing port. The sewage flows in a spiral shape inside the non-powered reactor 110 and is fully mixed and reacted under the action of the guide plate 113 inside the non-powered reactor 110. It flows out from the outlet 112 of the non-powered reactor 110 and mixes with the bubble-containing water at the outlet of the bubble mixing tank 131 in the pipeline, and mixes with the flocculant added at the flocculant dosing port. The flocculant agglomerates the fine suspended matter into larger suspended particles and adsorbs a large number of microbubbles.

[0040] The mud-water mixture with adsorbed microbubbles enters the inlet of the vortex mud-water separator 120. Under the action of the annularly arranged inclined guide plates 123, the mud-water mixture is evenly distributed throughout the vortex mud-water separator 120. Suspended solids float to the surface under the action of adsorbed bubbles, while clear water collects at the bottom and flows out from the clear water outlet 122. Part of the effluent is drawn by the return pump 132, and part flows by gravity to the adjustable weir plate 142 and the automatic valve 143. By adjusting the height of the weir plate, the water level in the vortex mud-water separator 120 can be kept constant at a certain position. When the automatic valve 143 is open, the liquid level is slightly lower than the scum discharge port edge of the scum collection cone 141; when the automatic valve 143 is closed, the liquid level is slightly higher than the scum discharge port edge of the scum collection cone 141, and the scum can be discharged by gravity.

[0041] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-efficiency vortex air flotation device, characterized in that: The system includes a non-powered reactor (110), a vortex sludge separator (120), a microbubble generator (130), and an automatic sludge discharger (140). The non-powered reactor (110) is used for chemical dosing of wastewater. The vortex sludge separator (120) is connected to the non-powered reactor (110). The vortex sludge separator (120) is provided with a flocculant inlet (125) for adding flocculant. The microbubble generator (130) is connected to the vortex sludge separator (120) and mixes the microbubbles with the sludge-water mixture in the vortex sludge separator (120). The automatic sludge discharger (140) is used to discharge the sludge separated from the clear water in the vortex sludge separator (120).

2. The high-efficiency vortex air flotation device according to claim 1, characterized in that: The non-powered reactor (110) is connected to a sewage inlet (111), an outlet (112), and a chemical dosing port. The sewage inlet (111) and the outlet (112) are arranged tangentially along the non-powered reactor (110), and the sewage inlet (111) and the outlet (112) are located at the upper and lower positions of the non-powered reactor (110), respectively. The chemical dosing port is located on one side of the sewage inlet (111).

3. The high-efficiency vortex air flotation device according to claim 2, characterized in that: The vortex mud-water separator (120) is provided with an inlet (121) and a clean water outlet (122). The inlet (121) is used to connect with the outlet (112). The inlet (121) is connected to the middle of the bottom wall of the vortex mud-water separator (120). The clean water outlet (122) is connected to the side wall of the vortex mud-water separator (120). The vortex mud-water separator (120) is provided with an annularly arranged inclined guide plate (123). The annularly arranged inclined guide plate (123) is coaxially arranged with the vortex mud-water separator (120) at the bottom of the vortex mud-water separator (120). The annularly arranged inclined guide plate (123) is arranged around the inlet (121).

4. The high-efficiency vortex air flotation device according to claim 3, characterized in that: The non-powered reactor (110) and the vortex mud-water separator (120) are connected by a pipeline (124). One end of the pipeline (124) is connected to the outlet (112), and the other end of the pipeline (124) is connected to the inlet (121). The flocculant dosing port (125) and the microbubble generator (130) are connected to the pipeline (124).

5. The high-efficiency vortex air flotation device according to claim 3, characterized in that: The automatic sludge discharge device (140) includes a scum collection cone (141), which is located in the upper part of the vortex sludge separator (120). The scum collection cone (141) is arranged circumferentially along the inner wall of the vortex sludge separator (120). A suspended matter collection space (144) is formed between the scum collection cone (141) and the inner wall of the vortex sludge separator (120). A sludge discharge port (126) is provided on the side wall of the vortex sludge separator (120), and the sludge discharge port (126) is connected to the suspended matter collection space (144).

6. The high-efficiency vortex air flotation device according to claim 5, characterized in that: The automatic sludge discharge device (140) also includes an adjustable weir plate (142) and an automatic valve (143). The adjustable weir plate (142) and the automatic valve (143) are connected in parallel to the clear water outlet (122). The adjustable weir plate (142) and the automatic valve (143) are used to adjust the liquid level in the vortex sludge separator (120).

7. The high-efficiency eddy current air flotation device according to claim 4, characterized in that: The microbubble generator (130) includes a bubble mixing tank (131) and a reflux pump (132). One end of the reflux pump (132) is connected to the clear water outlet (122) of the vortex mud-water separator (120). An air intake is provided at the inlet of the reflux pump (132). The other end of the reflux pump (132) is connected to the bubble mixing tank (131). The bubble mixing tank (131) is connected to the pipeline (124).

8. The high-efficiency vortex air flotation device according to claim 1, characterized in that: The non-powered reactor (110) is also provided with a guide plate (113). The guide plate (113) is located at the center of the bottom of the non-powered reactor (110). The guide plate (113) is arranged radially along the non-powered reactor (110). Multiple guide plates (113) are provided, and multiple guide plates (113) are arranged at equal angular intervals along the circumference of the non-powered reactor (110).

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