CN209872592U - Air-float sewage treatment device based on superoxide nano micro bubbles - Google Patents

Abstract

An air flotation sewage treatment device based on superoxide nano-microbubbles, including a waste water tank, a dosing storage tank and an air flotation tank, the waste water tank and the dosing storage tank are connected to the air flotation tank through a mixing pipeline, and an inlet pump is also arranged on the mixing pipeline and a nano-microbubble generating device; the air flotation tank is divided into a release area, a sedimentation area and a water outlet area, the release area and the sedimentation area are separated by a first deflector, and the sedimentation area and the water outlet area are separated by a second guide The bottom of the water outlet area is provided with a water outlet; the settling area is also provided with a slag discharge pool that separates the settling area from the upper part of the settling area. For the scum machine, the bottom of the slag discharge tank is also provided with a slag discharge hole, and the bottom of the settlement area is also provided with a number of second rows of mud buckets arranged in sequence. The design of the device is reasonable, the microbubbles generated have a small diameter, and they stay in the water for a long time, which can effectively adhere and separate the particles in the water, and the sewage treatment effect is good.

Description

Air flotation sewage treatment device based on superoxide nano-microbubbles

technical field

The utility model relates to the technical field of sewage treatment, in particular to an air flotation sewage treatment device based on superoxygen nano micro-bubbles.

Background technique

The air flotation method is to form highly dispersed micro-bubbles in water, adhere to the solid or liquid particles of the hydrophobic base in the wastewater, and form a water-gas-particle three-phase mixed system. After the particles adhere to the bubbles, the apparent density is smaller than that of water. The flocs float up to the water surface, forming a scum layer and being scraped off, so as to realize the process of solid-liquid or liquid-liquid separation.

The air flotation method can be divided into air distribution air flotation, electrolytic air flotation, biological and chemical air flotation and dissolved air flotation, etc. It is generally used as a pretreatment for secondary biological treatment to remove oil and suspended substances and ensure that the effluent water quality meets the relevant standards. standard requirements. The main factors affecting the air flotation process include the hydraulic conditions of the air flotation tank, the size of the floc particles, the reaction time, the surface load and the size of the bubbles. The size of the bubble is one of the most critical factors affecting the effect of air flotation. According to the difference of water quality and surface load, the best treatment effect can be obtained when the diameter of the bubble is 10-100nm.

At present, the most widely used method is the shallow dissolved air flotation method, with a depth of about 3 meters. On the one hand, there is a problem that the separation area fluctuates greatly, and the effluent is prone to mud. On the other hand, the design of the release area and the separation area is unreasonable. The alum flower formed by the suspended matter absorbs less dissolved air water, resulting in poor floating and sinking in a semi-suspended state. The effluent often contains a large number of suspended matter particles, resulting in The purification of water body is poor, and the removal rate of COD and SS is poor.

Contents of the invention

The technical problem to be solved by the utility model is to provide a nano-microbubble with small diameter, high SS removal rate, less dosing amount and good stabilizing effect, which can effectively prevent the surface sludge of the air flotation tank from turning and sinking. The air flotation sewage treatment device based on nano microbubbles.

The technical problem to be solved by the utility model is realized through the following technical solutions. The utility model is an air flotation sewage treatment device based on superoxygen nano-microbubbles. The device includes a waste water pool, a dosing storage tank and an air flotation pool. The waste water pool and the dosing storage tank are connected with the air flotation pool through a mixing pipeline. One end is connected to the mixer, the waste water pool and the dosing storage tank are both connected to the mixer, the other end of the mixing pipe extends into the air flotation tank from the outside, and is connected to a releaser, and the mixing pipe is also equipped with an inlet pump and nano-microbubbles generating device;

The air flotation tank is divided into a release area, a settlement area and a water outlet area. The release area and the settlement area are separated by a first deflector, and the settlement area and the water outlet area are separated by a second deflector. The bottom of the water outlet area A water outlet is provided; the releaser extends to the lower part of the release area, and the release area is sequentially installed with transverse partitions arranged in a staggered interval from bottom to top. The lower bucket mouth of the bucket is also equipped with the first mud discharge control valve;

The settling area is also provided with a slag discharge tank that separates the settling area from the upper part of the settling area. The height of the wall of the slag discharge tank near the water outlet area is consistent with the height of the wall of the air flotation tank. The top of the settling area is provided with a The scum in the upper part of the settlement area is scraped into the scum machine of the slag discharge tank. The bottom of the slag discharge tank is also provided with slag discharge holes. The second mud discharge control valve is installed on the lower bucket mouth.

The technical problem to be solved by the utility model can also be further realized through the following technical solutions. For the above-mentioned air flotation sewage treatment device based on superoxide nano-microbubbles, the wall of the slag discharge pool near the water outlet area The height is not lower than the height of the pool wall of the air flotation pool, and the heights of the first deflector and the pool wall of the slag discharge pool near the release area are lower than the height of the pool wall of the air flotation pool.

The technical problem to be solved by the utility model can also be further realized by the following technical solutions. For the above-mentioned air-flotation sewage treatment device based on superoxide nano-microbubbles, the pool of the slag discharge pool on the side near the release area The top of the wall is also provided with a downward inclined plate inclined to one side of the release area, and the upper end of the downward inclined plate is fixedly connected with the top of the pool wall of the slag discharge tank.

The technical problem to be solved by the utility model can also be further realized through the following technical solutions. For the above-mentioned air-flotation sewage treatment device based on superoxygen nano-microbubbles, the nano-microbubble generating device includes a vacuum negative pressure chamber, The end of the mixing pipe on the inlet side of the vacuum negative pressure chamber extends into the vacuum negative pressure chamber from the outside of the vacuum negative pressure chamber, and the end of the mixing pipe in the vacuum negative pressure chamber forms a nozzle-shaped injection part. There is a compression expansion tube in the mixing pipeline extending to the outlet side of the vacuum negative pressure chamber. The compression expansion tube includes a primary compression section, a primary expansion section, a secondary compression section and a secondary expansion section arranged in sequence; the vacuum negative pressure chamber is also installed There is an air intake device.

The technical problem to be solved by the utility model can also be further realized by the following technical solutions. For the above-mentioned air-flotation sewage treatment device based on superoxygen nano-microbubbles, the air intake device includes an air intake fan and an air intake pipe, One end of the air inlet pipe communicates with the air outlet of the air inlet, and the other end of the air inlet pipe communicates with the vacuum negative pressure chamber.

The technical problem to be solved by the utility model can also be further realized through the following technical solutions. For the above-mentioned air flotation sewage treatment device based on superoxygen nano microbubbles, the mixing pipeline on the inlet side of the vacuum negative pressure chamber and the vacuum The mixing pipes on the outlet side of the negative pressure chamber are also connected with a return pipe, and a return control valve is installed on the return pipe for controlling the on-off of the return pipe.

The technical problem to be solved by the utility model can be further realized by the following technical solutions. For the above-mentioned air flotation sewage treatment device based on superoxide nano-microbubbles, the water inlet pump is a multi-stage centrifugal pump.

The technical problem to be solved by the utility model can also be further realized by the following technical solutions. For the above-mentioned air flotation sewage treatment device based on superoxide nano-microbubbles, the depth of the air flotation pool is 3m-9m, and the slag discharge The distance between the hole and the top of the air flotation pool is 1/4-1/2 of the depth of the air flotation pool.

Compared with the prior art, the utility model fully mixes the wastewater and the medicament, and then injects air to generate a large number of nano microbubbles, thereby adhering the particles in the wastewater to form flocs with a lower density and suspending them in the On the surface of the water, it is regularly scraped off by the slag discharger; the formed flocs with large seals settle to the bottom of the water and are regularly discharged through the mud discharge hopper; at the same time, the supernatant without suspended matter passes through the flow of the second deflector Enter the water outlet area and discharge through the water outlet; secondly, use the nano-micro-bubble generating device to add a large amount of superoxide nano-micro-bubbles to the wastewater pharmaceutical mixture, and cooperate with the deflection of the transverse partition in the release area, which greatly prolongs the superoxide nano-micro-bubbles. The retention time in wastewater ensures the effect of sewage treatment. The design of the device is reasonable, the diameter of the microbubbles generated is small, and the retention time in the water is long, which can effectively adhere and separate the particles in the water, and the sewage treatment effect is good.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is a structural schematic diagram of the nano-microbubble generating device of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings of the utility model. Obviously, the described embodiments are Some embodiments of the utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

With reference to Fig. 1-2, a kind of air flotation sewage treatment device based on superoxygen nano microbubble, this device comprises waste water pool 1, dosing storage tank 2 and air flotation pool, waste water pool 1 and dosing storage tank 2 pass mixing pipe 19 and The air flotation tank is connected, one end of the mixing pipe 19 is connected with the mixer 3, the waste water tank 1 and the dosing storage tank 2 are connected with the mixer 3, and the other end of the mixing pipe 19 extends into the air flotation tank from the outside and is connected with the releaser 7 , a mixing control valve 4, an inlet pump 5 and a nano-microbubble generating device 6 are also arranged on the mixing pipeline 19; the waste water pool 1 is used to store sewage, the dosing storage tank 2 is used to store sewage treatment chemicals, and the waste water pool 1 passes the waste water The pipeline communicates with the mixer 3, and a waste water control valve is also arranged on the waste water pipeline. The mixer 3 in the prior art is used to fully mix the sewage and the medicament, and then mix the nano-micro-bubbles through the nano-micro-bubble generating device 6, and then diffuse to the release area 9 through the releaser 7.

The air flotation tank is divided into a release area 9, a settling area 14 and a water outlet area 16. The release area 9 and the settling area 14 are separated by a first guide plate, and the settling area 14 and the water outlet area 16 are separated by a second flow guide. The plate 15 is separated, and the bottom of the water outlet area 16 is provided with a water outlet; the releaser 7 extends to the bottom of the release area 9, and the release area 9 is sequentially installed with transverse partitions 8 arranged in a staggered interval from bottom to top, and the release area 9 The bottom is also provided with a first row of mud buckets 10, and a first mud discharge control valve 11 is installed at the lower mouth of the first row of mud buckets 10; both sides of the second deflector 15 are fixedly connected with the pool wall of the air flotation tank respectively. , thereby separating the release area 9 from the settling area 14, so that the wastewater entering the release area 9 can only move from bottom to top, and is deflected under the blocking effect of the transverse partition 8, greatly prolonging the residence time in the release area 9, It is convenient for nano microbubbles to adhere to the particles in the wastewater, and avoids the generation of large alum flowers.

Also be provided with in the described settling area 14 the slagging tank that cuts off the settling area 14 from the upper part of the settling area 14, the height of the pool wall near the slagging pool of the water outlet area 16 is consistent with the height of the pool wall of the air flotation tank, and the height of the pool wall of the settling area 14 The top is provided with a scum machine 12 for scraping the scum on the upper part of the settling area 14 into the slag discharge tank, and the bottom of the slag discharge tank is also provided with a slag discharge hole 13, and the bottom of the settling area 14 is also provided with a number of second rows arranged in sequence. Mud hopper 17, the lower mouth of the second row of mud hopper 17 is equipped with a second row of mud control valve 18. The slag discharge tank cuts off the settling area 14 from the top, preventing the waste water in the settling area 14 from flowing to the water outlet area 16 from the top, so that the waste water in the settling area 14 can only flow to the water outlet area 16 from the bottom of the slag discharge tank. The suspension ball plays a blocking role, which is convenient for the scum machine 12 to scrape the suspended matter into the scum discharge tank; The reciprocating track, the wall of the slag discharge tank near the water outlet area 16 is fixedly connected with the opposite wall and the wall of the air flotation tank on both sides, and the bottom wall of the slag discharge tank is connected with the wall of the air flotation tank and the wall of the slag discharge tank respectively. The side walls are fixedly connected to form a sealed pool, and at the same time, the settlement zone 14 is isolated from the upper part.

The height of the pool wall of the slag discharge tank near the water outlet area 16 is not lower than the height of the pool wall of the air flotation tank, and the height of the first deflector and the pool wall of the slag discharge tank near the release area 9 side are all lower than The height of the pool wall of the air flotation pool, during normal operation, the liquid level in the air flotation pool is higher than the first deflector and the height of the pool wall of the slag discharge pool near the release area 9, and the liquid level in the air flotation pool Lower than the height of the wall of the slag discharge tank near the water outlet area 16, the slag discharge tank is arranged on the side of the settlement area 14 close to the water outlet area 16, so that the waste water entering the settlement area 14 from the release area 9 can only finally pass through the slag discharge area. The bottom of the pool enters the water outlet area 16 again, so that the scum machine 12 can scrape the suspended matter in the settling area 14 into the slag discharge tank and discharge it, preventing this part of the suspended matter from entering the water outlet area 16.

The top of the wall of the slag discharge tank near the release area 9 is also provided with a downwardly inclined plate inclined to the release area 9, and the upper end of the downward slope is fixedly connected with the top of the wall of the slag discharge tank.

Alternatively, a third deflector is arranged horizontally and horizontally between the first deflector and the wall of the slag discharge tank near the release area, and the third deflector near the slag discharge tank is provided with a convenient waste water The circulation port that flows to the lower part of the settling area makes the waste water mixture in the release area enter the settling area only along the third deflector, and remains above the third deflector in the settling area, which is convenient for the scum machine to remove the upper layer of scum Scraping; on the third deflector near the slag discharge tank, there is also a slope matched with the flow port, which is convenient for the scum machine to scrape the scum into the scum discharge tank. Too much scum enters the slag discharge tank.

Described nano micro-bubble generator 6 comprises vacuum negative pressure chamber 21, and the end of the mixing pipeline 19 of vacuum negative pressure chamber 21 inlet sides stretches in the vacuum negative pressure chamber 21 from the outside of vacuum negative pressure chamber 21, and vacuum negative pressure chamber 21 The end portion of the mixing pipeline 19 in the interior forms a beak-shaped injection portion, and the vacuum negative pressure chamber 21 is also provided with a compression expansion tube extending to the mixing pipeline 19 on the outlet side of the vacuum negative pressure chamber 21. The compression expansion tube includes sequentially arranged The primary compression section 22, the primary expansion section 23, the secondary compression section 24 and the secondary expansion section 25; the vacuum negative pressure chamber 21 is also equipped with an air intake device. When in use, the water inlet pump 5 transports the waste water and the medicament mixture in the mixing pipe 19 to the vacuum negative pressure chamber 21, and under the action of the nozzle-shaped spray part, a high-speed water flow enters the vacuum negative pressure chamber 21, and at the same time Under the action of high-speed water flow, the air introduced by the air intake device is sucked into the vacuum negative pressure chamber 21, and the air and water are fully mixed with water in the vacuum negative pressure chamber 21 to form superoxide negative ion nano-bubbles, which are then compressed and expanded by the tube. Two times of compression and expansion, and then spread out through the water outlet pipe; two times of compression and expansion are carried out in the compression and expansion pipe, the mixture of air and water is compressed once through the first compression section 22, and then expanded through the first expansion section 23, and then passed through the second expansion section. The secondary compression section 24 performs recompression, and finally, expands through the secondary expansion section 25. The superoxide anion nanobubbles fully contact and mix with water, so as to quickly and fully realize the oxygen dissolution process with the water body and form a saturated dissolved oxygen state.

The air intake device includes an air intake fan 26 and an air intake pipe 20 , one end of the air intake pipe 20 communicates with the air outlet of the air inlet, and the other end of the air intake pipe 20 communicates with the vacuum negative pressure chamber 21 . The air intake fan 26 is a fan with multiple gears, and the air intake volume can be selected as required.

The mixing pipeline 19 on the inlet side of the vacuum negative pressure chamber 21 and the mixing pipeline 19 on the outlet side of the vacuum negative pressure chamber 21 are also connected with a return pipeline, and a backflow control valve for controlling the on-off of the backflow pipeline is installed on the backflow pipeline. The backflow control valve adopts the control valve with adjustable opening in the prior art, which is convenient to adjust the flow rate of the backflow pipeline. Gas volume adjustment; a check valve can also be set on the return pipe to prevent the waste water at the inlet side of the vacuum negative pressure chamber 21 from directly flowing into the return pipe, which will affect the return flow.

The water inlet pump 5 is a multi-stage centrifugal pump. The multi-stage centrifugal pump has a vertical structure and has the characteristics of a small footprint. Delivery of wastewater and pharmaceutical mixtures.

The depth of the air flotation tank is 3m-9m, and the distance between the slag discharge hole 13 and the top of the air flotation tank is 1/4-1/2 of the depth of the air flotation tank. Preferably, the depth of the air flotation tank is 5m, and the slag discharge The distance between the hole 13 and the top of the air flotation pool is 1/2 of the depth of the air flotation pool. The depth of the conventional air flotation pool is about 3m, but the depth of the air flotation pool of the present application can reach 9m.

A kind of air flotation sewage treatment method based on superoxygen nano microbubbles, its steps are as follows:

(1) The waste water tank and the dosing storage tank respectively deliver wastewater and chemicals to the mixer through pipelines, and the wastewater and chemicals enter the mixer to be fully mixed, and then transported to the nano-microbubble generating device through the water inlet pump;

(2) The mixture of wastewater and medicine entering the nano-microbubble diffusion device forms a high-speed water flow through the nozzle-shaped injection part and sprays it into the vacuum negative pressure chamber, forming a negative pressure in the vacuum negative pressure chamber, sucking the air in the intake pipe, so that Air and water flow are mixed to form an air-water mixture with nano-microbubbles, and then diffused into the mixing pipe through primary compression, primary expansion tube, secondary compression and secondary expansion, and then discharged into the release area in the air flotation pool through the release device;

(3) The air-water mixture is blocked by the transverse partition in the release area, and the upward flow rate is reduced, so that the nano-microbubbles can stay in the release area for a long time with the air-water mixture, achieving uniform bubble formation, and ensuring the upper part of the release area There are no large alum flowers in the area, and the sludge generated in the release area is regularly discharged through the first row of mud hoppers;

(4) The wastewater in the release area is fully mixed and reacted with the medicament to produce a certain amount of suspended matter, which is brought to the water surface by nano-microbubbles, flows to the settlement area, and is regularly scraped into the slag discharge tank by the upper slag scraper, and finally passes through the slag discharge The hole is discharged out of the pool, and the remaining suspended matter falls into the bottom of the settlement area through the flow port, and is discharged through the second row of mud hoppers;

(5) In the water outlet area, the water flow velocity is reduced by the blocking of the second deflector, so that only the wastewater without suspended solids in the upper layer of the settlement area enters the water outlet through the second deflector, and then is discharged through the water outlet.

Claims (8)

1. An air flotation sewage treatment device based on superoxygen nano microbubbles, characterized in that: the device comprises a waste water tank, a dosing storage tank and an air flotation tank, and the waste water tank and the dosing storage tank are communicated with the air flotation tank through a mixing pipeline, and the mixing One end of the pipeline is connected with a mixer, the waste water tank and the dosing storage tank are both connected with the mixer, the other end of the mixing pipeline extends into the air flotation tank from the outside, and is connected with a releaser, and the mixing pipeline is also equipped with an inlet pump and a nano Microbubble generating device; The air flotation tank is divided into a release area, a settlement area and a water outlet area. The release area and the settlement area are separated by a first deflector, and the settlement area and the water outlet area are separated by a second deflector. The bottom of the water outlet area A water outlet is provided; the releaser extends to the lower part of the release area, and the release area is sequentially installed with transverse partitions arranged in a staggered interval from bottom to top. The lower bucket mouth of the bucket is also equipped with the first mud discharge control valve; The settling area is also provided with a slag discharge tank that separates the settling area from the upper part of the settling area, and a scum machine for scraping the scum from the upper part of the settling area into the scum discharge tank is installed on the top of the settling area, and a scum machine is installed at the bottom of the slag discharge tank. There are slag discharge holes, and a number of second rows of mud hoppers arranged in sequence are arranged at the bottom of the settlement area, and the lower bucket openings of the second row of mud hoppers are all equipped with second mud discharge control valves. 2. The air flotation sewage treatment device based on superoxygen nano microbubbles according to claim 1, characterized in that: the height of the wall of the slag discharge tank near the water outlet area is not lower than the height of the wall of the air flotation tank , the heights of the first deflector and the pool wall of the slag discharge pool near the release area are lower than the height of the pool wall of the air flotation pool. 3. The air flotation sewage treatment device based on superoxygen nano microbubbles according to claim 2, characterized in that: the top of the wall of the slag discharge tank near the release area side is also provided with a The inclined lower inclined plate, the upper end of the lower inclined plate is fixedly connected with the top of the pool wall of the slag discharge tank. 4. The air flotation sewage treatment device based on superoxygen nano-microbubbles according to claim 1, characterized in that: the nano-microbubble generating device comprises a vacuum negative pressure chamber, the end of the mixing pipeline on the inlet side of the vacuum negative pressure chamber The part extends from the outside of the vacuum negative pressure chamber into the vacuum negative pressure chamber. The end of the mixing pipe in the vacuum negative pressure chamber forms a beak-shaped injection part. A compression expansion tube in the pipeline, the compression expansion tube includes a primary compression section, a primary expansion section, a secondary compression section and a secondary expansion section arranged in sequence; an air intake device is also installed on the vacuum negative pressure chamber. 5. The air flotation sewage treatment device based on superoxygen nano microbubbles according to claim 4, characterized in that: the air intake device comprises an air intake fan and an air intake pipe, and one end of the air intake pipe and the air outlet of the air inlet communicated, and the other end of the intake pipe is communicated with the vacuum negative pressure chamber. 6. The air flotation sewage treatment device based on superoxygen nano microbubbles according to claim 4, characterized in that: between the mixing pipeline on the inlet side of the vacuum negative pressure chamber and the mixing pipeline on the outlet side of the vacuum negative pressure chamber It is connected with a return pipe, and a return control valve for controlling the on-off of the return pipe is installed on the return pipe. 7. The air flotation sewage treatment device based on superoxide nano-microbubbles according to claim 1, characterized in that: the water inlet pump is a multi-stage centrifugal pump. 8. The air flotation sewage treatment device based on superoxygen nano microbubbles according to claim 1, characterized in that: the depth of the air flotation tank is 3m-9m, and the distance between the slag discharge hole and the top of the air flotation tank is 1/4-1/2 of the depth of the floating pool.