Integrated ozone catalytic air flotation flocculation device

Abstract

The utility model relates to an integrated ozone catalytic air flotation flocculation device which comprises a reaction tank which is integrally conical, and an ozone inlet is formed in the bottom of the reaction tank; a hollow cylindrical ozone catalyst mesh basket is arranged in the reaction tank corresponding to the periphery of the ozone inlet, and a granular ozone catalyst is filled in the hollow cylindrical ozone catalyst mesh basket; a circular channel is formed in the middle of the hollow cylindrical ozone catalyst mesh basket, and an unpowered stirrer is arranged in the circular channel and realizes unpowered rotation under the action of water inlet pressure and ozone filling buoyancy; a water inlet pipe is arranged at the top of the reaction tank, extends towards the top of the hollow cylindrical ozone catalyst mesh basket and is over against the upper end of the circular channel; a communicating vessel water outlet pipe is arranged on one side of the lower end of the reaction tank; a filter membrane is arranged at the joint of the communicating vessel water outlet pipe and the reaction tank; a water outlet is formed in the upper end of the communicating vessel water outlet pipe. The device has the characteristics of low energy consumption, good organic matter degradation effect, small occupied area, good maneuverability and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, and particularly relates to an integrated ozone catalytic air flotation and flocculation device. Background Art

[0002] In the field of water treatment processes, flocculation and air flotation are two common water treatment technologies, mainly used to remove suspended solids, colloidal substances, and other small particles that are not easily sedimented in water. These two processes are often used in combination to improve water treatment efficiency. Stirring is required during the air flotation and flocculation processes, and one of the important factors affecting the flocculation reaction is the stirring intensity of water. If the stirring intensity is too low, the mixing will be uneven; if the stirring intensity is too high, the formed flocs will be broken up, affecting the effect. At the same time, most current stirrers use electric stirring, which not only consumes a large amount of electricity and has high operation and maintenance costs, but also easily shows obvious laminar flow and cannot play a good stirring role. In addition, the current flocculation reaction tank cannot further degrade organic matter, and it is often necessary to set up an organic matter degradation tank in the pre-stage. These water treatment systems often cover a large area and have high energy consumption once they are in operation. For some sewage with a small discharge volume and discontinuous discharge time, the mobility of these sewage treatment systems is insufficient. Content of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides an integrated ozone catalytic air flotation and flocculation device, which combines a non-powered stirrer and ozone catalytic technology in an air flotation and flocculation reaction tank, can reasonably combine a variety of water treatment processes, and produces a device that can treat small-volume sewage and discontinuous sewage. The device is suitable for being carried by vehicle and has the characteristics of low energy consumption, good organic matter degradation effect, small floor area, and good mobility.

[0005] (2) Technical Solutions

[0006] The technical solution of the utility model is as follows:

[0007] An integrated ozone catalytic air flotation and flocculation device, which includes a reaction tank with an overall conical shape, and an ozone inlet is provided at the bottom of the reaction tank; around the ozone inlet in the reaction tank, there is a hollow cylindrical ozone catalyst basket filled with granular ozone catalyst inside.

[0008] In the middle of the hollow cylindrical ozone catalyst basket is a circular channel. Inside the circular channel is a hollowed-out support. A rotating shaft is installed in the middle of the hollowed-out support. A first impeller is provided above the rotating shaft, and a second impeller is provided below the rotating shaft. The number of the first impellers is 2 or more, and the number of the second impellers is 2 or more; the first impeller and the second impeller each have a plurality of fan blades. The plane where the fan blades of the first impeller are located has an inclined angle relative to the horizontal plane, and the plane where the fan blades of the second impeller are located has an inclined angle relative to the horizontal plane, and the inclined direction of the fan blades of the first impeller is opposite to the inclined direction of the fan blades of the second impeller;

[0009] At the top of the reaction tank is a water inlet pipe, which extends to the top of the hollow cylindrical ozone catalyst basket and is directly opposite the upper end of the circular channel; the ozone inlet is directly opposite the lower end of the circular channel;

[0010] On one side of the lower end of the reaction tank is a communicating vessel outlet pipe; a filter membrane is provided at the connection of the communicating vessel outlet pipe and the reaction tank; an outlet is provided at the upper end of the communicating vessel outlet pipe.

[0011] According to a preferred embodiment of the present invention, the outlet of the communicating vessel outlet pipe is connected to a water pump.

[0012] According to a preferred embodiment of the present invention, the particle size of the ozone catalyst is 1 millimeter to 5 millimeters.

[0013] According to a preferred embodiment of the present invention, the inclined angle of the plane where each fan blade of the first impeller and the second impeller is located relative to the horizontal plane is 30-45 degrees, preferably 30°.

[0014] According to a preferred embodiment of the present invention, the diameters of the first impeller and the second impeller account for 0.7-0.9 times the diameter of the circular channel.

[0015] According to a preferred embodiment of the present invention, an ozone circulation collection port is also provided at the top of the reaction tank, which is used to collect the unreacted ozone and re-introduce it into the reaction tank from the ozone inlet to improve the ozone utilization rate.

[0016] According to a preferred embodiment of the present invention, a scum outlet is provided on one side of the upper end of the reaction tank.

[0017] According to a preferred embodiment of the present invention, the bottom of the reaction tank extends downward for a section of space in the surrounding area centered on the hollow cylindrical ozone catalyst basket to form a flocculent slag collection area.

[0018] According to a preferred embodiment of the present invention, the width of the flocculent slag collection area gradually shrinks from top to bottom, and a slag discharge port is provided at the bottom of the flocculent slag collection area.

[0019] According to a preferred embodiment of the present utility model, the integrated ozone catalytic air flotation and flocculation device is a vehicle-mounted device, which is integrally made of stainless steel or fiberglass.

[0020] (III) Beneficial effects

[0021] The present utility model combines the ozone catalytic degradation technology and the non-powered rotary stirrer in the air flotation and flocculation reaction tank. The vertically downward water inlet at the upper part of the reaction tank acts on the first impeller, and the ozone filled from the bottom acts on the second impeller. Since the blades of the first impeller and the blades of the second impeller both have an angle with respect to the horizontal plane and the inclination directions are opposite, the rotating shaft in the hollow cylindrical ozone catalyst basket rotates rapidly, realizing the stirring effect on the flocculation reaction tank. This stirring does not require electricity, the stirring intensity is moderate, and there will be no laminar flow problem. Under the action of the flocculant, the flocculant residues are collected at the bottom of the reaction tank.

[0022] The rotating impeller can disperse the sewage and ozone entering the reaction tank, strengthen the mixing and mass transfer, and enrich the influent water and ozone gas to the granular ozone catalyst (molecular sieve supported) in the hollow cylindrical ozone catalyst basket under the centrifugal rotating force. Ozone, wastewater and ozone catalyst meet and react in the basket, improving the ozone catalytic effect and being beneficial to reducing the organic matter content in the wastewater. The rising ozone gas can also play an air flotation effect, and the generated air flotation residues are collected on the liquid surface and discharged from the scum outlet at the upper end of the reaction tank. The effluent overflows and discharges through the communicating pipe outlet pipe. Based on the principle of the communicating vessel, the water in the reaction tank will flow towards the communicating pipe outlet pipe and pass through the filter membrane for filtration based on the pressure difference to prevent the flocculant residues from entering the communicating pipe outlet pipe. The communicating pipe outlet pipe can also be connected to a water pump to provide greater filtration power. Description of the drawings

[0023] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present utility model.

[0024] Figure 2 It is a schematic structural diagram of Embodiment 2 of the present utility model. Detailed implementation manners

[0025] In order to better explain the present utility model for easy understanding, the present utility model will be described in detail below with reference to the drawings through specific implementation manners.

[0026] Embodiment 1

[0027] As Figure 1The shown integrated ozone catalytic air flotation and flocculation device includes a reaction tank 1 with an overall conical shape. At the bottom of the reaction tank 1, there is an ozone inlet 11. Around the ozone inlet 11 in the reaction tank 1, there is a hollow cylindrical ozone catalyst basket 12 filled with granular ozone catalyst inside. The inner and outer surfaces of the hollow cylindrical ozone catalyst basket 12 are provided with mesh holes, and the size of the mesh holes is appropriate to prevent the granular ozone catalyst from leaking out. The particle size of the ozone catalyst is 1 millimeter to 5 millimeters or some particles reach more than 5 mm.

[0028] The middle of the hollow cylindrical ozone catalyst basket 12 is a circular channel, and a non-powered agitator is arranged in the circular channel. The specific setting method is as follows: The circular channel is provided with a hollowed-out support 13. A rotating shaft 14 is installed in the middle of the hollowed-out support 13. A first impeller 15 is arranged at the upper part of the rotating shaft, and a second impeller 16 is arranged at the lower part of the rotating shaft. The number of the first impellers 15 is 2 or more, and the number of the second impellers 16 is 2 or more. The first impeller 15 and the second impeller 16 respectively have a plurality of fan blades, and the plane where the fan blades of the first impeller 15 are located has an inclined angle relative to the horizontal plane, and the plane where the fan blades of the second impeller 16 are located has an inclined angle relative to the horizontal plane. The difference is that the inclined direction of the fan blades of the first impeller 15 is opposite to the inclined direction of the fan blades of the second impeller 16. Among them, the inclined angle of the plane where each fan blade of the first impeller 15 and the second impeller 16 is located relative to the horizontal plane is 30 - 45 degrees, preferably 30°. The diameters of the first impeller 15 and the second impeller 16 account for 0.7 - 0.9 times of the diameter of the circular channel to achieve a better disturbance effect.

[0029] At the top of the reaction tank 1, there is a water inlet pipe 17. The water inlet pipe 17 extends a certain length towards the top of the hollow cylindrical ozone catalyst basket and is directly opposite to the upper end of the circular channel. The ozone inlet 11 is directly opposite to the lower end of the circular channel. Under the water inlet pressure of the water inlet pipe 17 and the air inlet pressure of the ozone inlet 11, the non-powered agitator in the circular channel will rotate rapidly.

[0030] On one side of the lower end of the reaction tank 1, there is a communicating vessel outlet pipe 18. A filter membrane 181 is provided at the connection between the communicating vessel outlet pipe 18 and the reaction tank 1, and a water outlet 182 is provided at the upper end of the communicating vessel outlet pipe 18. Preferably, the water outlet 182 is connected to a water pump.

[0031] At the top of the reaction tank 1, there is also an ozone circulation collection port 19. The ozone circulation collection port 19 is connected to the ozone inlet 11 through an air extraction pump, which is used to collect the unreacted ozone and re-introduce it into the reaction tank from the ozone inlet to improve the ozone utilization rate. On one side of the upper end of the reaction tank 1, there is a scum outlet 20. Among them, a gas washing device can also be arranged between the ozone circulation collection port 19 and the ozone inlet 11 to absorb and remove some small-molecule VOCs, etc.

[0032] Example 2

[0033] As Figure 2 shown, it is another embodiment of the present utility model. The main difference from Embodiment 1 is that in this embodiment, the bottom of the reaction tank 1 extends downward for a section of space around the hollow cylindrical ozone catalyst basket 12 as the center to form a flocculant residue collection area 21. As shown in the figure, the width of the flocculant residue collection area 21 gradually shrinks from top to bottom to promote the continuous collision of particle flocs during the sinking process and generate larger flocs, which are stably deposited at the bottom of the flocculant residue collection area 21. A slag discharge port 22 is provided at the bottom of the flocculant residue collection area 21.

[0034] The integrated ozone catalytic air flotation and flocculation device of the present utility model is a vehicle-mounted device, which is integrally made of stainless steel or fiberglass, has good integration and mobility, and is suitable for treating small-volume sewage and scattered and discontinuous sewage discharges.

[0035] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An integrated ozone catalytic flotation flocculation device, characterized in that: It includes a reaction tank which is generally conical in shape, and an ozone inlet is arranged at the bottom of the reaction tank; a hollow cylindrical ozone catalyst basket is arranged around the ozone inlet in the reaction tank, and a granular ozone catalyst is filled in the basket; A circular channel is provided in the middle of the hollow cylindrical ozone catalyst basket, a hollow bracket is provided in the circular channel, a rotating shaft is installed in the middle of the hollow bracket, a first impeller is provided on the upper part of the rotating shaft, and a second impeller is provided on the lower part of the rotating shaft. The number of the first impellers is 2 or more, and the number of the second impellers is 2 or more; the first impeller and the second impeller respectively have a plurality of blades, the plane where the blades of the first impeller are located has an inclined angle relative to the horizontal plane, the plane where the blades of the second impeller are located has an inclined angle relative to the horizontal plane, and the inclination direction of the blades of the first impeller is opposite to the inclination direction of the blades of the second impeller; A water inlet pipe is provided at the top of the reaction tank, which extends toward the top of the hollow cylindrical ozone catalyst basket and faces the upper end of the circular channel; the ozone inlet faces the lower end of the circular channel; a communicating vessel water outlet pipe is provided on one side of the lower end of the reaction tank; a filter membrane is provided at the connection between the communicating vessel water outlet pipe and the reaction tank; and a water outlet is provided at the upper end of the communicating vessel water outlet pipe.

2. The integrated ozone catalytic flotation flocculation device according to claim 1 is characterized in that: The water outlet of the communicating vessel water outlet pipe is connected to a water pump.

3. The integrated ozone catalytic flotation flocculation device according to claim 1 is characterized in that: The particle size of the ozone catalyst is 1 mm to 5 mm.

4. The integrated ozone catalytic flotation flocculation device according to claim 1 is characterized in that: The inclined angle of the plane where the blades of the first impeller and the second impeller are located relative to the horizontal plane is 30-45 degrees.

5. The integrated ozone catalytic flotation flocculation device according to claim 1 or 4, characterized in that: The diameters of the first impeller and the second impeller are 0.7-0.9 times the diameter of the circular channel.

6. The integrated ozone catalytic flotation flocculation device according to claim 1, characterized in that: An ozone circulation collection port is also provided at the top of the reaction tank, which is used to collect unreacted ozone and pass it into the reaction tank again from the ozone inlet.

7. The integrated ozone catalytic flotation flocculation device according to claim 1, characterized in that: A scum outlet is provided on one side of the upper end of the reaction tank.

8. The integrated ozone catalytic flotation flocculation device according to claim 1, characterized in that: A space is extended downward from the surrounding area around the hollow cylindrical ozone catalyst basket at the bottom of the reaction tank to form a flocculation residue collection area.

9. The integrated ozone catalytic flotation flocculation device according to claim 8, characterized in that: The width of the flocculation slag collection area gradually shrinks from top to bottom, and a slag discharge port is provided at the bottom of the flocculation slag collection area.

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