CN205676349U - Ozone microbubble floatation thickening device - Google Patents

Abstract

This invention discloses an ozone microbubble flotation concentration device. The device includes a reaction tank, an ozone generator, a sludge remover, and a sludge collection tank. Four to six sets of series-connected vortex three-phase mixers are arranged side-by-side above the reaction tank. Sludge is fed into the multi-stage vortex three-phase mixers via a pressurized inlet pump to form vortices. Ozone is fed into the first-stage vortex three-phase mixer via a gas booster pump or air compressor. PAM reagent is fed into the second or third-stage vortex three-phase mixer via a reagent dosing pump. In the multi-stage vortex three-phase mixers, the reagent comes into contact with and mixes with pollutant particles, water, and gas, generating microbubbles that form flocs. The flocs, carrying bubbles, float to the liquid surface to form scum. This invention achieves sludge conditioning through the multi-stage vortex three-phase mixer and the enhanced oxidation effect of ozone, while simultaneously obtaining flotation scum with a moisture content of 90-95%, which is beneficial for subsequent dewatering by an ultra-high pressure elastic press or plate and frame dewatering machine.

Description

Ozone microbubble air flotation concentration device

technical field

The utility model belongs to the technical field of sludge treatment, and relates to an ozone micro-bubble air flotation concentration device, which is suitable for conditioning and concentration of sludge, and the scum after conditioning and concentration enters an ultra-high pressure elastic press for pressing and dehydration.

Background technique

Sludge is the product of sewage treatment, which is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids, etc. The main characteristics of sludge are high water content (up to 99%), high organic content, easy to rot and smell, and fine particles, small specific gravity, colloidal liquid, it is between liquid and solid Thickness. In recent years, with the rapid development of my country's economy and sewage treatment technology, the amount of sludge produced has also increased rapidly, and the resulting sludge treatment and disposal issues have attracted increasing attention. Due to the high moisture content of sludge in sewage treatment plants, large volume, large volume, and easy to produce foul odor, the most important link in sludge treatment is to dehydrate the sludge and separate the solid and liquid phases in the sludge. Currently, sewage treatment Most of the sludge in the plant is dewatered mechanically, especially with ultra-high pressure elastic presses or plate and frame dehydrators. Ordinary activated sludge (referring to the sediment produced in the secondary sedimentation tank of the activated sludge treatment process) has a moisture content of about 99%. When the water content of the sludge is reduced from 99% to 95%, the volume of the sludge can be reduced to 1/5 of the original. To effectively and economically further treat sludge and reduce its storage area, sludge concentration must be carried out first.

In order to improve the dehydration efficiency of the ultra-high pressure elastic press or the plate and frame dehydrator, the sludge should also be concentrated first. The gravity concentration (precipitation) method was first adopted in China. The moisture content of the sludge after concentration in this concentration method is generally 95 to 97%. However, it occupies a large area, the concentration effect is poor, and the sludge moisture content after concentration is high. Defects such as easy fermentation to produce odor limit its development. At present, the sludge concentration method commonly used in sewage treatment plants is to use mechanical concentration, such as screw press type, belt type thickener, etc. Although this concentration method occupies a small area and has little impact on the surrounding environment, it has high cost and high power consumption. In particular, this kind of concentration method has problems such as high water content of mud output, high PAM dosing rate, high equipment failure rate, and large amount of flushing water, which also limits its development.

In order to improve the dewatering performance of the sludge, before the sludge is pumped into the ultra-high pressure elastic press or the plate and frame dehydrator for dehydration, the sludge conditioning treatment is also carried out. The commonly used conditioning method is the conditioning method of iron salt + lime, but this conditioning method introduces heavy metal iron ions and calcium ions, and increases the dry basis of sludge, which is not conducive to subsequent sludge treatment and disposal.

With the need of urban development in our country and the shortage of land resources, a new type of sludge thickening device and sludge conditioning and thickening method with small footprint, remarkable treatment effect and low water content of treated sludge is extremely needed.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide an ozone micro-bubble air flotation concentration device to solve the problems of the unreasonable sludge conditioning method and the low dryness of the sludge concentration in the prior art, and realize Sludge conditioning + high dryness concentration are carried out simultaneously to facilitate subsequent sludge ultra-high pressure elastic pressing or plate and frame dehydrator dehydration.

The technical scheme of the utility model is as follows:

An ozone micro-bubble air flotation concentration device, which includes a reaction tank, 4 to 6 groups (4 to 6 stages) of vortex three-phase mixers connected in series are arranged side by side above the reaction tank, the first stage is the side near the water outlet, and the first stage is near the inlet. The water side is the last stage, (that is, the first stage, the second stage...the Nth stage are arranged in sequence from the water outlet side to the water inlet side), and each stage of the vortex three-phase mixer is equipped with a first-stage reactor; the reaction tank is from The water inlet side and the water outlet side are divided into three rooms by the weir plate: the contact room, the separation room and the clean water collection room; the slag remover is set above the separation room, and the slag collection tank is set under the other end of the slag remover; one end of the main water inlet pipe is connected to the water inlet The outlet of the water pump is connected, and the other end is connected to the side water inlet of the first-stage vortex three-phase mixer; the bottom water outlet of the first-stage vortex three-phase mixer is connected to the side water inlet of the second-stage vortex three-phase mixer;... By analogy, the bottom water outlet of the previous stage vortex three-phase mixer is connected to the side water inlet of the latter stage vortex three-phase mixer; the bottom water outlet of the last stage vortex three-phase mixer is directly connected to a release pipe; The outlet of the release pipe is located at the lower part of the contact chamber of the reaction tank; the water inlet pipe at the side water inlet of each stage of the vortex three-phase mixer is provided with a bypass injection pipe; the outlet of the drug preparation device is connected to the inlet of the drug dosing pump; one end of the drug inlet pipe is It is connected to the outlet of the chemical dosing pump, and the other end of the drug inlet pipe is respectively connected to the bypass injection pipe at the side water inlet of the second and third stage vortex three-phase mixers; the outlet of the ozone generator is connected to the gas booster pump or air The inlet of the compressor is connected; one end of the inlet pipe is connected to the outlet of the gas booster pump or air compressor, and the other end is connected to the top air inlet of the first-stage vortex three-phase mixer; the top air outlet of the third-stage vortex three-phase mixer Connect an exhaust pipe; the exhaust pipe is provided with an exhaust valve.

Further, a slag remover is installed above the separation chamber, and the other end of the slag remover extends horizontally above the slag collection tank; the top of the slag collection tank is lower than the bottom of the vortex three-phase mixer; more than half of the lower part of the slag collection tank is inclined, The bottom is located above the clean water collection chamber.

Further, the water inlet pipe at the side water inlet of each stage vortex three-phase mixer is perpendicular to the bypass injection pipe.

Furthermore, a flow meter is provided on the main water inlet pipe; a pressure gauge is provided on the top of each vortex three-phase mixer. An intake valve is arranged on the intake pipe, and a check valve is also arranged behind the intake valve. A one-way valve is also arranged on the drug inlet pipe. A liquid level gauge is provided on the slag collecting tank.

A method for conditioning and concentrating sludge using the above-mentioned ozone microbubble air flotation concentration device is as follows:

Sludge (including domestic sewage sludge, industrial wastewater sludge, and water supply sludge) is transported into a multi-stage vortex three-phase mixer through a water inlet pipe through a pressurized water inlet pump to form a vortex, that is, from the first stage vortex three-phase mixing After the ozone is prepared by the ozone generator, it is compressed by a gas booster pump or an air compressor to increase the pressure of the ozone gas, and then it is transported into the first-stage vortex through the intake pipe. In the three-phase mixer; after the PAM agent (polyacrylamide) is prepared by the agent preparation device, the pressurized agent dosing pump is used to add it to the second-stage and third-stage vortex three-phase mixer through the drug inlet pipe , injected from the bypass injection pipe at the side water inlet of the vortex three-phase mixer (injection perpendicular to the water flow direction or oblique injection); in the multi-stage vortex three-phase mixer in the contact chamber of the reaction tank, the pressurized ozone is directly Dissolved in the influent wastewater, and then the PAM agent is directly added to the air-dissolved liquid. The agent contacts and mixes with the pollutant particles (solid), water, and gas in three-phase contact. The eddy current generates microbubbles and implants them in the pollutants. Collect and form flocs; in the separation chamber, air bubbles are entrained in the flocs, which float up to the liquid surface to form scum and complete solid-liquid separation; use the scum remover to automatically remove the scum, and the scum enters the slag collection tank for collection or treatment; The clean water is collected in the clean water collection chamber and discharged from the bottom of the reaction tank.

Sludge with a water content of 98.5-99.5% (domestic sewage sludge, industrial wastewater sludge or water supply sludge), after conditioning and concentration treatment by the ozone micro-bubble air flotation concentration device, a higher dryness flotation concentration can be obtained. The water content of the air-floated scum is 90-95%. The scum after conditioning can be directly transported to the ultra-high pressure elastic press for pressing without adding any chemicals. The water content of the mud cake after pressing can reach 55%. ~65%.

The water inlet pump is set on the main water inlet pipeline, and the pressure of the water inlet pump is 0.6-0.9Mpa; the pressure of the first-stage vortex three-phase mixer is the highest (0.6-0.9Mpa), and the pressure in the following vortex three-phase mixers decreases one by one. .

After the PAM agent (polyacrylamide) is prepared, use the pressurized agent dosing pump to add it to the second or third stage vortex three-phase mixer; the dosing pressure of the PAM agent dosing pump is slightly higher than the pressure of the water inlet pump (ie slightly larger than 0.6 ~ 0.9MPa). The dosage of PAM agent is 0.002～0.006gPAM/gDS (dry sludge).

The air flotation concentration device is equipped with an ozone preparation and dosing device—ozone generator. Ozone (O ₃ ) is an isotope of oxygen, its redox potential in water is 2.07V, and it has a strong oxidation ability. By adding ozone to the remaining activated sludge, some bacteria are oxidized into cell fragments. After the cells are broken, proteins, nucleic acids, etc. are released, so that the sludge can be conditioned and the subsequent sludge dehydration performance can be enhanced. Because ozone is extremely unstable, it cannot be used in bottles like other gases, and can only be used with production. Therefore, in the air flotation concentration device and process, an ozone generator is installed. After the ozone is prepared, it is compressed by a gas booster pump or an air compressor to increase the pressure of the ozone gas, and then it is transported into the first-stage vortex through the gas pipeline. in a three-phase mixer. The pressure of the ozone gas (that is, the pressure at the outlet of the gas booster pump or the air compressor) is slightly greater than the pressure of the water inlet pump (that is, slightly greater than 0.6-0.9MPa). The dosage of ozone is 0.006～0.010gO ₃ /gDS (dried sludge).

The beneficial effects of the utility model:

The ozone micro-bubble air flotation concentration device of the utility model is used for conditioning and concentrating sludge. The air flotation concentration device and the sludge conditioning and concentration method of the utility model can obtain High-dryness, tempered scum, which can be directly pumped into subsequent ultra-high pressure elastic presses or plate and frame presses for dehydration.

The ozone micro-bubble air flotation concentration device and the sludge conditioning and concentration method of the utility model can realize sludge conditioning (add PAM agent, waste water and ozone to the vortex three-phase mixer at the same time, and pass through the multi-stage vortex three-phase mixer. The physical effect and the enhanced oxidation of ozone on the sludge realize the sludge conditioning), which can replace the iron salt + lime conditioning method and improve the dehydration performance of the sludge; at the same time, it can obtain air-floated scum with a higher dryness (water content rate of 90 to 95%), in order to facilitate the follow-up ultra-high pressure elastic press or plate and frame dehydrator dehydration.

The ozone microbubble air flotation concentration device of the utility model has the following characteristics:

A. The core component of the ozone microbubble air flotation concentration device is a special structure of water, gas and solid three-phase vortex mixing reactor (ie vortex three-phase mixer), which can collect dissolved gas, differential stirring, particle adhesion, The functions of floc aeration, dissolved gas nucleation and bubble release are integrated; through the vortex three-phase mixer, floc formation and bubble nucleation are formed at the same time, resulting in huge and porous flocs that rise rapidly; all influent wastewater is 100% gas filling, no circulating water pump and clear water tank; the reaction tank is divided into three chambers by the weir plate: contact chamber, separation chamber and clean water collection chamber; in the vortex three-phase mixer in the contact chamber, the medicament and pollutant particles ( Solid), water, and gas three-phase contact and mixing, the vortex generates microbubbles and implants them in the pollutants, the pollutants are captured and form flocs; in the separation chamber, the flocs are entrained with air bubbles and float to the liquid surface to complete solidification The liquid is separated, and the rear part only needs to scrape the slag; the clean water is collected in the clean water collection chamber. The device uses less PAM agent, and the water content of the scum is drier;

B. The gas source of the ozone micro-bubble air flotation concentration device is ozone with a pressure slightly higher than 0.6-0.9MPa, and the air flotation scum is tempered by using the strong oxidation of ozone;

C. The high-dryness concentration of sludge and the conditioning and tempering of the sludge are carried out at the same time. The air-floated scum does not need to be tempered afterward, and it is directly dehydrated in an ultra-high pressure elastic press or a plate and frame dehydrator.

The technical characteristics of the ozone micro-bubble air flotation concentration device of the utility model are that it realizes the innovation of equipment integration, sludge conditioning and sludge flotation, and omits the preparation of dissolved air water, circulating water system and slow and inefficient bubble attachment. The process has achieved unprecedented scum removal efficiency (the scum removal rate is over 99%), saving more than 90% of the floor area and a large amount of infrastructure investment costs. Due to the high removal efficiency, the load of the subsequent treatment process can be greatly reduced and its stability can be increased. Since the generated scum contains less water and is compact, the volume of the scum storage tank can be greatly reduced. The whole process is more reliable, and the floor area and operating costs are greatly reduced.

The principle of the ozone micro-bubble air flotation concentration device of the utility model is opposite to that of gravity concentration. Bubbles adhere to the suspended matter as a carrier to form a gas-solid mixture with a density lighter than water, which floats to the water surface, thereby separating suspended matter impurities from water. , and then use a scraper to scrape the concentrated sludge into the sludge discharge tank, and the sludge water is discharged from the bottom of the tank. Compared with gravity concentration, the ozone micro-bubble air flotation concentration device of the utility model has the characteristics of fast concentration speed, short residence time, low water content of scum, high quality of effluent, and small floor area.

Description of drawings

Fig. 1 is the structural representation of a kind of ozone microbubble air flotation concentration device of the utility model;

Fig. 2 is the working flow diagram of the ozone microbubble air flotation concentration device of the utility model;

Fig. 3 is a schematic structural view of a six-stage series-connected vortex three-phase mixer in the present invention.

In the figure: 1. Inlet pump 2. Flow meter 3. Air compressor 4. Intake valve 5. Reaction tank A, contact chamber B, separation chamber C, clean water collection chamber 6. Slag collection tank 7. Liquid level gauge 8. Deslagging machine 9. Exhaust valve 10. Pressure gauge 11. Vortex three-phase mixer 12. Drug inlet pipe 13. Main water inlet pipe 14. Water inlet pipe at the side water inlet of the vortex three-phase mixer 15. Bypass injection pipe 16. Ozone generator 17. Chemical dosing pump 18. Chemical preparation device

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Example 1

As shown in Fig. 1 and Fig. 3, a kind of ozone microbubble air flotation concentration device of the present utility model, it comprises a reaction tank 5, and six groups (six stages) vortex three-phase mixer 11 ( From the water outlet side to the water inlet side, they are arranged in sequence as the first stage, the second stage...the sixth stage), and each stage of the vortex three-phase mixer is equipped with a first-stage reactor; the reaction tank is formed by a weir plate from the water inlet side to the water outlet side It is divided into three chambers, namely: contact chamber A, separation chamber B and clean water collection chamber C; a slag remover 8 is set above the separation chamber B, and the other end of the slag remover 8 extends horizontally to the top of the slag collection tank 6; the slag collection tank 6 The top of the vortex three-phase mixer is lower than the bottom of the vortex three-phase mixer 11; more than half of the lower part of the slag collection tank 6 is inclined, and the inclined bottom is located above the clear water collection chamber C; one end of the main water inlet pipe 13 is connected to the outlet of the water inlet pump 1; One end is connected to the side water inlet of the first-stage vortex three-phase mixer; the total water inlet pipe 13 is provided with a flowmeter 2; the bottom water outlet of the first-stage vortex three-phase mixer is connected to the side of the second-stage vortex three-phase mixer Water inlet connection;...and so on, the bottom water outlet of the previous stage vortex three-phase mixer is connected to the side water inlet of the latter stage vortex three-phase mixer; the last stage (sixth stage) vortex three-phase mixer The outlet at the bottom of the outlet is directly connected to a release pipe; the outlet of the release pipe is located at the lower part of the contact chamber A of the reaction tank; the water inlet pipe 14 at the side water inlet of each stage vortex three-phase mixer is provided with a vertical bypass injection pipe 15; The outlet of the medicine preparation device 18 is connected to the inlet of the medicine dosing pump 17; one end of the medicine feeding pipe 12 is connected to the outlet of the medicine dosing pump 17, and the other end of the medicine feeding pipe 12 is respectively connected to the sides of the second-stage and third-stage vortex three-phase mixers. The bypass injection pipe 15 at the water inlet is connected; the outlet of the ozone generator 16 is connected to the inlet of the air compressor 3; one end of the inlet pipe is connected to the outlet of the air compressor 3, and the other end is connected to the top of the first-stage vortex three-phase mixer. The top outlet of the third-stage vortex three-phase mixer is connected to an exhaust pipe; the exhaust pipe is provided with an exhaust valve 9. A pressure gauge 10 is provided on the top of each vortex three-phase mixer. The intake pipe is provided with an intake valve 4, and a check valve is also provided behind the intake valve 4. The medicine feeding pipe 12 is also provided with a one-way valve. A liquid level gauge 7 is provided on the slag collection tank 6 for controlling the start and stop of the subsequent slag discharge pump.

The ozone micro-bubble air flotation concentration device of the utility model is a kind of pressure-dissolved air flotation. This process of forming and combining micro-bubbles and micro-flocs at the same time, and then growing together into gas-bearing flocs is called " Co-gathering". The smaller the air bubbles, the easier it is to enter the flocs or be captured by the flocs, thus forming a stable co-polymerized flocs. It releases highly dense micro-bubbles in a delayed manner. When it is fully mixed with the reaction water mixed with the drug, the two grow at the same time. The advantages of using less gas.

The design principle of the ozone micro-bubble air flotation concentration device of the utility model is: use the vortex three-phase mixer to directly add gas and medicine into the wastewater, complete the gas dissolution and stirring at the same time, and finally realize automatic slag removal. The vortex three-phase mixer integrates the functions of dissolved air, differential stirring, floc aeration, particle attachment, dissolved air crystal nucleation and bubble release. Its working process includes: ① high-pressure dissolved air ② stretching agent ③ full stirring ④ crystal nucleus formation ⑤ air bubble aggregation ⑥ floc merging ⑦ scum conditioning ⑧ circulation flocculation. The difference between the vortex three-phase mixer and the traditional dissolved air flotation: maximize the use of chemicals; form ultra-light hollow flocs, reduce the water content and specific gravity of the flocs, and the flocs are strong and have a strong self-floating ability. Conducive to automatic slag removal.

As shown in Figure 2, the working process of the ozone micro-bubble air flotation concentration device of the present utility model is: (1) water intake: use the pressurized water intake pump to input the waste water from the regulating tank into the multi-stage vortex three-phase mixer to form a vortex; (2) Aeration/dosing mixing and stirring: In the multi-stage vortex three-phase mixer, the pressurized ozone is directly dissolved in the influent wastewater, and then the chemical agent is directly added to the dissolved gas liquid to complete the chemical agent and pollutants. Particles (solid), water, and gas are mixed in three phases; the drug molecules are initially coiled, and the vortex stretches the drug molecules to improve the effect and fully stir; (3) The vortex generates microbubbles and implants them in the suspension: drug and pollutant particles After the mixture of water and gas is released into the contact chamber A of the reaction tank, the weir flow enters the separation chamber B, and the vortex generates microbubbles and implants them in the pollutants, the pollutants are captured, and the flocs are formed and floated; (4) Release suspended solids; (5) Use a scum remover to automatically remove scum; scum (sludge) enters the scum tank 6 for collection or treatment; clean water is collected in the clean water collection chamber C and discharged from the bottom of the reaction tank.

The ozone micro-bubble air flotation concentration device of the utility model generates micro-bubbles through a vortex three-phase mixer, adheres to the suspended matter as a carrier, forms a gas-solid mixture with a density lighter than water, and floats to the water surface, thereby making the suspended matter impurity Separated from water; can effectively remove solid suspended particles, oil, turbidity and organic matter in complex sewage; effectively promote the efficient treatment of pollutants, and achieve excellent energy saving and emission reduction effects.

The ozone micro-bubble air flotation concentration device of the utility model adopts the foreign vortex three-phase mixing technology, and the water flow in the vortex three-phase mixer generates a fierce vortex, thereby achieving differential stirring and mixing of medicine, water and gas. Use the bypass injection pipe to inject the flocculant into the raw water pipe (that is, the water inlet pipe) close to the inlet of the reaction zone (that is, the side water inlet of the vortex three-phase mixer), and the diameter of the bypass injection pipe is smaller than that of the raw water pipe. Many, the small holes of the bypass injection pipe shoot out at a high speed perpendicular to the direction of the water flow of the raw water pipe. Raw water is mixed quickly. The flocculant mixing can be divided into three sections. The first section is the potential flow section. In this section, the flow velocity of the jet remains unchanged, and the jet begins to mix with the surrounding raw water. The second section is the deflection section, which is injected under the action of water flow in the raw water pipe. The flow is deflected in the direction of the water flow and further mixed with the raw water; the third section is the vortex section, and several vortices occur on the water flow section of the jet, so that the jet spreads rapidly and completely mixes with the raw water. In short, when passing through gaps and nodes, violent convergence, dispersion, turning, and tearing occur, so countless small eddies are formed, which greatly accelerates the medium turbulence and surface renewal speed, and greatly reduces the liquid film resistance, so the mass transfer rate is very high. .

The characteristics of the ozone microbubble air flotation concentration device of the present utility model are as follows:

1. High-pressure dissolved air: Dissolve 100% of the pressurized ozone in the influent sewage. According to the bubble attachment theory of traditional air flotation, this step realizes the attachment of pollutant molecules and air bubbles in the dissolved state with the minimum limit contact gas;

2. Stretching agent: Usually, when the polymer is added, the molecular chain is twisted into a group. The unique high-efficiency mixer of this product can stretch the twisted molecular chain into a long molecular chain, so that the molecular chain of the agent The charge can be fully exposed and utilized, reducing waste;

3. Fully stirring: the multi-stage high-efficiency mixer realizes the full contact and mixing of the medicament and the pollutant through various effective speeds. To enable pollutants to be firmly adsorbed by the charges carried and exposed by the molecular chain of the agent;

4. Scum formation: As the pressure decreases, the dissolved gas gradually forms numerous fine bubbles with the help of pollutant flocs, which grow directly in the sludge flocs;

5. Bubble agglomeration: Bubbles merge and expand continuously to produce spongy floc particles;

6. Floc merging: During the floating process of flocs, small flocs merge and grow rapidly, and at the same time, the bubbles also expand rapidly, occupying the interstitial water space in the flocs, further reducing the moisture content and specific gravity of the flocs, and the flocs are strong and have Strong self-floating ability;

7. Refined and tempered scum: The scum floats up to the surface of the pool, accumulates with each other, and bonds into a scum blanket, forming an overall floating, and the water content is further reduced;

8. Water collection: the effluent concentrated by air flotation is discharged from the bottom of the reaction tank, enters the water collection pipe and is collected to the clean water area;

9. Control of scum layer: Control the height of the effluent liquid level by adjusting the weir plate, so as to control the thickness of the scum layer.

Example 2-5

A method of using the ozone microbubble air flotation concentration device described in Embodiment 1 of the utility model to carry out sludge conditioning and concentration is as follows: (Embodiments 2-5 are all processed according to this method)

Sludge (domestic sewage sludge, industrial wastewater sludge, water supply sludge) is transported into a multi-stage vortex three-phase mixer through a water inlet pipe to form a vortex using a pressurized water inlet pump, that is, from the first stage vortex three-phase mixer Enter the following several stages of vortex three-phase mixer one by one; after the ozone is prepared by the ozone generator, it is compressed by a gas booster pump or an air compressor to increase the pressure of the ozone gas, and then it is transported into the first stage of the vortex three-phase mixer through the intake pipe. In the phase mixer; after the PAM agent is prepared by the agent preparation device, the pressurized agent dosing pump is used to pass through the drug inlet pipe and added to the second and third stage vortex three-phase mixers, and the vortex three-phase mixing The bypass injection pipe at the water inlet on the side of the device is injected (injection perpendicular to the direction of water flow); in the multi-stage vortex three-phase mixer in the contact chamber of the reaction tank, the pressurized ozone is directly dissolved in the influent wastewater, followed by the PAM agent Dosing directly into the gas-dissolved liquid, the agent is mixed with pollutant particles (solid), water and gas in three-phase contact, the vortex generates microbubbles and implants them in the pollutants, the pollutants are captured and form flocs; in the separation chamber , the air bubbles are entrained in the flocs, which float up to the liquid surface to form scum and complete the solid-liquid separation; the scum is automatically removed by the scum remover, and the scum enters the scum tank for collection or treatment; the clean water is collected in the clean water collection room, and the reaction tank Bottom drain.

Sludge with a water content of 98.5-99.5%, after conditioning and concentration treatment by the ozone micro-bubble air flotation concentration device, a relatively dry scum is obtained, and the water content of the air flotation scum is 90-95%. The scum after conditioning can be directly transported to an ultra-high pressure elastic press for pressing without adding any chemicals, and the water content of the mud cake after pressing can reach 55-65%.

The dosage of PAM agent is 0.002-0.006gPAM/gDS (dry sludge), and the dosage of ozone is 0.006-0.010gO ₃ /gDS (dry sludge). The pressure of the water inlet pump is 0.6-0.9Mpa; the pressure of the ozone gas (that is, the pressure at the outlet of the gas booster pump or the air compressor) is slightly greater than the pressure of the water inlet pump (that is, slightly greater than 0.6-0.9MPa); the dosing of the PAM agent dosing pump The pressure is slightly higher than the inlet pump pressure (that is, slightly higher than 0.6-0.9MPa). The pressure of the first-stage vortex three-phase mixer is the highest (0.6-0.9Mpa), and the pressures in the following stages of vortex three-phase mixers decrease gradually one by one.

Embodiment 2: the processing object is the remaining sludge (water content 99%) discharged from the secondary sedimentation tank of a sewage treatment plant based on a certain domestic sewage water source, and the ozone microbubble air flotation concentration device of embodiment 1 is adopted to carry out conditioning, Concentration treatment: the dosage of PAM is 0.003gPAM/gDS (dry sludge), the dosage of ozone is 0.00625gO ₃ /gDS (dry sludge); the pressure of the water inlet pump is about 0.8Mpa; The pressure at the outlet of the pump or air compressor) is slightly greater than the pressure of the water inlet pump (slightly greater than 0.8 MPa); the dosing pressure of the PAM agent dosing pump is slightly greater than the pressure of the water inlet pump (slightly greater than 0.8 MPa). The pressure of the first-stage vortex three-phase mixer is the highest (about 0.8Mpa), and the pressure in the subsequent vortex three-phase mixer decreases gradually (such as 0.7Mpa, 0.6Mpa, 0.5Mpa, 0.4Mpa, 0.3Mpa or 0.2Mpa, The measured value may deviate from the above data).

After tempering and concentration treatment by the ozone micro-bubble air flotation concentration device of the utility model, the water content of the obtained air flotation scum is 93%. The tempered scum does not add any chemicals, and is directly transported to an ultra-high pressure elastic press for pressing, and the water content of the mud cake after pressing reaches 59%.

Embodiment 3: the processing object is the surplus sludge (water content 98.7%) discharged from the secondary settling tank of an industrial wastewater treatment plant based on certain food industry wastewater, and the ozone microbubble air flotation concentration device of embodiment 1 is used for conditioning , concentration treatment: the dosage of PAM is 0.0035gPAM/gDS, the dosage of ozone is 0.008gO ₃ /gDS (dry sludge); the pressure of the water inlet pump is about 0.6Mpa; the pressure of ozone gas is slightly higher than the pressure of the water inlet pump (slightly higher than 0.6MPa); the dosing pressure of the PAM agent dosing pump is slightly higher than the inlet pump pressure (slightly greater than 0.6 MPa). The pressure of the first-stage vortex three-phase mixer is the highest (about 0.6Mpa), and the pressure in the subsequent vortex three-phase mixer decreases gradually.

After tempering and concentration treatment by the ozone micro-bubble air flotation concentration device of the utility model, the water content of the obtained air flotation scum is 94%. The tempered scum does not add any chemicals, and is directly transported to an ultra-high pressure elastic press for pressing, and the water content of the mud cake after pressing reaches 62%.

Embodiment 4: the processing object is the remaining sludge (water content 98.5%) discharged from the secondary sedimentation tank of a sewage treatment plant based on a certain domestic sewage water source, adopting the ozone microbubble air flotation concentration device of embodiment 1 to carry out conditioning, Concentration treatment: PAM dosage is 0.006gPAM/gDS, ozone dosage is 0.010gO ₃ /gDS (dry sludge); inlet pump pressure is about 0.7Mpa; ozone gas pressure is slightly higher than inlet pump pressure (slightly greater than 0.7 MPa); the dosing pressure of the PAM agent dosing pump is slightly higher than the inlet pump pressure (slightly greater than 0.7 MPa). The pressure of the first-stage vortex three-phase mixer is the highest (about 0.7Mpa), and the pressure in the subsequent vortex three-phase mixer decreases gradually.

After being tempered and concentrated by the ozone micro-bubble air flotation concentration device of the utility model, the water content of the obtained air flotation scum is 90%. The tempered scum does not add any chemicals, and is directly transported to an ultra-high pressure elastic press for pressing, and the water content of the mud cake after pressing reaches 55%.

Embodiment 5: The processing object is the surplus sludge (water content 99.5%) discharged from the secondary sedimentation tank of an industrial wastewater treatment plant based on certain food industry wastewater, and the ozone microbubble air flotation concentration device of Embodiment 1 is used for conditioning , concentration treatment: the dosage of PAM is 0.002gPAM/gDS, the dosage of ozone is 0.006gO ₃ /gDS (dry sludge); the pressure of the water inlet pump is about 0.9Mpa; the pressure of ozone gas is slightly higher than the pressure of the water inlet pump (slightly higher than 0.9MPa); the dosing pressure of the PAM agent dosing pump is slightly higher than the inlet pump pressure (slightly greater than 0.9 MPa). The pressure of the first-stage vortex three-phase mixer is the highest (about 0.9Mpa), and the pressure in the subsequent vortex three-phase mixer decreases gradually.

After being tempered and concentrated by the ozone micro-bubble air flotation concentration device of the utility model, the water content of the obtained air flotation scum is 95%. The tempered scum does not add any chemicals, and is directly transported to an ultra-high pressure elastic press for pressing, and the water content of the mud cake after pressing reaches 65%.

Claims (8)

1. an ozone microbubble floatation thickening device, it is characterised in that it includes a reactive tank, sets side by side above reactive tank Put the eddy current three-phase blender of 4～6 grades of series connection, be the first order by water outlet side, be afterbody by influent side；Reactive tank is from water inlet Side is separated into three rooms to water outlet side by weir plate: contact chamber, separation chamber and clear water collecting chamber；Separation chamber is provided above slag remover, Below the slag remover other end, dreg collecting slot is set；Water inlet manifold one end is connected with intake pump outlet, the other end and first order eddy current three The lateral inflow mouth of phase blender connects；The bottom outlet of first order eddy current three-phase blender mixes with second level eddy current three-phase The lateral inflow mouth of device connects；By that analogy, the bottom outlet of previous stage eddy current three-phase blender and rear stage eddy current three-phase The lateral inflow mouth of blender connects；The bottom outlet of afterbody eddy current three-phase blender is directly connected to a release pipe； Release pipe outlet is positioned at reactive tank contact chamber bottom；Set on water inlet pipe at the lateral inflow mouth of every primary vortex three-phase blender There is bypass ascending pipe；The outlet of medicament preparation facilities is connected with adding of agent pump intake；Drug-feeding tube one end and adding of agent pump discharge Connect, the drug-feeding tube other end respectively with the second level, third level eddy current three-phase blender lateral inflow mouth at bypass ascending pipe Connect；Ozone generator outlet is connected with gas boosting pump or air compressor machine entrance；Air inlet pipe one end and gas boosting pump or pneumatics Machine outlet connects, and the other end is connected with the top air inlet of first order eddy current three-phase blender；Third level eddy current three-phase blender Gas outlet, top connect an exhaustor；Exhaustor is provided with air bleeding valve.

2. ozone microbubble floatation thickening device as claimed in claim 1, it is characterised in that the slag remover other end is horizontal-extending Above dreg collecting slot；The top of dreg collecting slot is less than the bottom of eddy current three-phase blender；Dreg collecting slot bottom is a greater part of is to tilt, and inclines Wedged bottom is positioned at above clear water collecting chamber.

3. ozone microbubble floatation thickening device as claimed in claim 1 or 2, it is characterised in that every primary vortex three-phase mixes Water inlet pipe at the lateral inflow mouth of clutch is vertical with bypass ascending pipe.

4. ozone microbubble floatation thickening device as claimed in claim 1 or 2, it is characterised in that water inlet manifold is provided with stream Gauge.

5. ozone microbubble floatation thickening device as claimed in claim 1 or 2, it is characterised in that every primary vortex three-phase mixes Clutch top is equipped with Pressure gauge.

6. ozone microbubble floatation thickening device as claimed in claim 1 or 2, it is characterised in that air inlet pipe is provided with air inlet Valve, is provided with check valve after intake valve.

7. ozone microbubble floatation thickening device as claimed in claim 1 or 2, it is characterised in that drug-feeding tube is provided with unidirectional Valve.

8. ozone microbubble floatation thickening device as claimed in claim 1 or 2, it is characterised in that dreg collecting slot is provided with liquid level Meter.