High-efficiency mixed flocculation air floatation ozone membrane filtration purification device

Abstract

The utility model discloses a high-efficiency mixing flocculation air floatation ozone membrane filtration purification device, which is characterized in that a superfine powdered carbon feeding chamber, a high-efficiency mixing flocculation chamber, an ozone contact chamber, an air floatation-ultrafiltration membrane chamber and a sludge chamber are integrated, superfine powdered carbon is fed into a water inlet end, and enters an air floatation-ultrafiltration membrane process section through the ozone contact chamber after being reacted by a high-efficiency flocculation barrel; the air floatation produced water flows back to the pressure dissolved air tank, the superfine powdered carbon sludge at the bottom of the membrane tank flows back to the superfine powdered carbon adding chamber, and the ultrafiltration membrane effluent enters the produced water tank. According to the device, through the ultrafine powder carbon-efficient flocculation-ozone-air flotation-ultrafiltration-bottom mud backflow process, the effluent quality is good, the membrane pollution of an ultrafiltration membrane is effectively controlled, the cleaning frequency is reduced, and the system stability is improved; the powdered carbon bottom mud reflows to promote the formation of floccules, so that internal resources of the device are recycled, and the device is low-carbon and environment-friendly; the hydraulic flow state of the efficient mixing flocculation barrel is good, the mechanical flocculation effect is good, and the dosage of chemicals is reduced; the integrated device is high in integration degree, wide in applicable water quantity range and less in limitation on inflow water quality, and has a relatively good treatment effect on high-algae-content water, high-turbidity water, high-organic-matter water, production wastewater and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, relates to drinking water purification and production wastewater reuse disposal technology applicable to water supply plants, and in particular to a high-efficiency mixed flocculation flotation ozone membrane filtration purification device. Background Art

[0002] Membrane fouling refers to the phenomenon during the membrane filtration process whereby particles, colloidal particles, or solute macromolecules in the water are adsorbed and deposited on the membrane surface or within the membrane pores due to physical and chemical interactions or mechanical effects on the membrane, causing the membrane pore size to become smaller or clogged, resulting in irreversible changes in the membrane's permeability and separation characteristics. The generation of membrane fouling is extremely complex. Currently, on the one hand, during the filtration process, particles, micelles, or certain solute molecules in the wastewater interact physically or chemically with the membrane, or the solute exceeds its solubility on the membrane surface due to concentration gradients; on the other hand, mechanical effects may cause adsorption and deposition on the inner and outer surfaces of the membrane, resulting in a smaller or clogged membrane pore size, a reduction in membrane flux, and a reduction in separation performance. The ultimate result is deposition on the inner and outer surfaces of the membrane. Based on this, membrane fouling can be divided into filter cake layer pollution deposited on the membrane surface and membrane pore blockage pollution.

[0003] In flotation ultrafiltration membrane filtration technology, membrane fouling has always been a key factor affecting stable operation. Therefore, when treating complex raw water such as high-algae water, high-turbidity water, high-organic matter water and production wastewater, how to extend the backwash cycle of the ultrafiltration membrane, slow down membrane fouling and improve system operation stability has become a key technical problem that needs to be solved urgently. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a high-efficiency mixed flocculation flotation ozone membrane filtration purification device to solve the deficiencies in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention is realized by the following technical solutions:

[0006] Provided is a high-efficiency mixed flocculation flotation ozone membrane filtration purification device, which includes an ultrafine pulverized carbon dosing chamber, a high-efficiency mixed flocculation chamber, an ozone contact chamber, an air flotation-ultrafiltration membrane chamber and a sludge chamber. The high-efficiency mixed flocculation chamber includes a high-efficiency mixed flocculation barrel. The ultrafine pulverized carbon dosing chamber, the high-efficiency mixed flocculation barrel, the ozone contact chamber and the air flotation-ultrafiltration membrane chamber are sequentially connected. The air flotation-ultrafiltration membrane chamber includes an ultrafiltration membrane assembly, a pressure dissolved air tank and a water production pool. Ultrafine pulverized carbon and flocculant are added to the water inlet end, mixed and then enter the high-efficiency mixed flocculation chamber for reaction, and then enter the air flotation-ultrafiltration membrane chamber from the ozone contact chamber. The flotation water flows back to the pressure dissolved air tank for recycling, and the ultrafiltration membrane effluent flows into the water production pool. The ultrafine pulverized carbon sludge at the bottom of the membrane pool flows back to the sludge chamber and then back to the ultrafine pulverized carbon dosing chamber.

[0007] As described in the high-efficiency mixed flocculation flotation ozone membrane filtration purification device, wherein the ultrafine pulverized carbon dosing chamber includes a first mixer, a flocculant dosing pipe, an ultrafine pulverized carbon dosing pipe and a water inlet pipe, the high-efficiency mixed flocculation chamber also includes a rectangular guide pipe and a second mixer, the ozone contact chamber includes an ozone diffuser, an air dosing pipe and an ozone pipeline, the flotation-ultrafiltration membrane chamber also includes a pressure water tank, a back-dissolution water pump, a water production pipe, a backwash water pipe, a back-dissolution water pipe and a water production suction pump, the sludge chamber includes a bottom mud return pump, a bottom mud discharge pump, a bottom mud discharge pipe, a bottom mud return pipe, a bottom mud discharge pipe and a sludge mixer, the ultrafine pulverized carbon dosing chamber is connected to the high-efficiency mixed flocculation barrel through the rectangular guide pipe, the ozone pipeline is connected to the pressure dissolved air tank, and the pressure dissolved air tank adds dissolved ozone and air to the ozone contact chamber through the ozone diffuser and the air dosing pipe.

[0008] As described in the high-efficiency mixed flocculation flotation ozone membrane filtration purification device, wherein the flotation-ultrafiltration membrane chamber further includes a flotation skimmer and a skimmer tank, and the flotation skimmer skims suspended particles and oily particles that float due to adhering to bubbles to the skimmer tank.

[0009] As described in the high-efficiency mixed flocculation flotation ozone membrane filtration purification device, wherein the flotation skimmer and the ultrafiltration membrane assembly are vertically spaced and overlapped.

[0010] As described in the high-efficiency mixed flocculation flotation ozone membrane filtration purification device, the ultrafiltration membrane adopts physical cleaning and chemical cleaning, and the physical cleaning realizes physical backwashing through the pressure water tank. The lower part of the pressure water tank is flushing water, and the upper part is air. The air compressor instantly adds pressurized air to the top of the pressure water tank to realize rapid air aeration washing of the membrane pool.

[0011] As for the high-efficiency mixed flocculation flotation ozone membrane filtration purification device, wherein the reflux ratio of the ultrafine pulverized carbon sludge at the bottom of the membrane pool back to the ultrafine pulverized carbon addition chamber is 5-10%.

[0012] The beneficial effects of the technical solution of this utility model are:

[0013] 1. It has good water purification effect, is applicable to a wide range of water volume, has few restrictions on inlet water quality, and has good treatment effects on high algae water, high turbidity water, and high organic matter water;

[0014] 2. Reduce the degree of ultrafiltration membrane contamination, reduce cleaning frequency, and improve system stability;

[0015] 3. The return of powdered carbon sludge promotes the formation of flocs, realizing the recycling of resources within the device, which is low-carbon and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To further illustrate the above-mentioned purpose, structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the planar structure of a preferred embodiment of the utility model;

[0018] Figure 2 for Figure 1 Cross-section along AA direction;

[0019] Figure 3 This is a schematic diagram of the rectangular flow guide tube structure of a preferred embodiment of the present utility model;

[0020] Figure: 1. Ultrafine pulverized carbon dosing chamber; 101. First mixer; 102. Flocculant dosing pipe; 103. Ultrafine pulverized carbon dosing pipe; 104. Water inlet pipe; 2. High-efficiency mixing and flocculation chamber; 201. High-efficiency mixing and flocculation barrel; 202. Rectangular flow guide pipe; 203. Second mixer; 3. Ozone contact chamber; 301. Ozone diffuser; 302. Air dosing pipe; 303. Ozone pipeline; 4. Air flotation-ultrafiltration membrane chamber; 401. Ultrafiltration membrane assembly; 4 02. Pressure dissolved air tank; 403. Water production pool; 404. Pressure water tank; 405. Back-dissolved water pump; 406. Water production pipe; 407. Backwash water pipe; 408. Back-dissolved water pipe; 409. Water production suction pump; 410. Flotation skimmer; 411. Skimming tank; 5. Sludge chamber; 501. Bottom sludge return pump; 502. Bottom sludge discharge pump; 503. Bottom sludge discharge pipe; 504. Bottom sludge return pipe; 505. Bottom sludge discharge pipe; 506. Sludge mixer. DETAILED DESCRIPTION

[0021] The terms "utility model" and "the present invention" as used in this specification are intended to refer broadly to all subject matter of this specification and any patent claims below. Statements containing these terms should not be understood to limit the subject matter described herein or to limit the meaning or scope of any patent claim below. In addition, this specification does not attempt to describe or limit the subject matter covered by any claim of any specific component, paragraph, statement or figure of this application. The subject matter should be understood with reference to the entire specification, all drawings and any claims below. The present invention may have other embodiments and be practiced or implemented in other ways. Moreover, it should be understood that the wording and terminology used herein are for illustrative purposes and should not be considered as limiting.

[0022] The details of the present invention will now be discussed with reference to the accompanying drawings which illustrate the present invention by way of example only. In the accompanying drawings, similar features or components may be marked with the same reference numerals.

[0023] The use of "including," "having," and "comprising" and variations thereof herein is intended to encompass the items listed thereafter and equivalents thereof, as well as additional items. Although reference may be made to directions such as above, below, upward, downward, rearward, bottom, top, front, and rear in describing the drawings, for convenience, reference is made relative to the drawings. These directions are not intended to literally define or limit the present invention in any manner. Furthermore, terms such as "first," "second," and "third" are used herein for descriptive purposes and are not intended to indicate or imply importance or significance.

[0024] See Figure 1 、 Figure 2 As shown, in a preferred embodiment, the utility model high-efficiency mixed flocculation flotation ozone membrane filtration purification device includes an ultrafine pulverized carbon addition chamber 1, a high-efficiency mixed flocculation chamber 2, an ozone contact chamber 3, an air flotation-ultrafiltration membrane chamber 4 and a sludge chamber 5, the high-efficiency mixed flocculation chamber 2 includes a high-efficiency mixed flocculation barrel 201, the ultrafine pulverized carbon addition chamber 1, the high-efficiency mixed flocculation barrel 201, the ozone contact chamber 3 and the air flotation-ultrafiltration membrane chamber 4 are connected in sequence, and the air flotation-ultrafiltration membrane chamber 4 includes an ultrafiltration membrane assembly 401, pressure dissolved air tank 402 and water production pool 403, ultrafine powdered carbon and flocculant are added at the water inlet end, and after mixing, they enter the high-efficiency mixing and flocculation chamber 2 for reaction, and then enter the flotation-ultrafiltration membrane chamber 4 from the ozone contact chamber 3. The flotation water is returned to the pressure dissolved air tank 402 for recycling, and the ultrafiltration membrane effluent enters the water production pool 403. The ultrafine powdered carbon sludge at the bottom of the membrane pool is returned to the sludge chamber 5 and then returned to the ultrafine powdered carbon addition chamber 1, and the reflux ratio is 5-10%.

[0025] Furthermore, the ultrafine pulverized carbon dosing chamber 1 includes a first mixer 101, a flocculant dosing pipe 102, an ultrafine pulverized carbon dosing pipe 103 and a water inlet pipe 104, the high-efficiency mixing flocculation chamber 2 also includes a rectangular guide pipe 202 and a second mixer 203, the ozone contact chamber 3 includes an ozone diffuser 301, an air dosing pipe 302 and an ozone pipe 303, the flotation-ultrafiltration membrane chamber 4 also includes an air pressure water tank 404, a back-dissolving water pump 405, a water production pipe 406, a backwash water pipe 407, a back-dissolving water pipe 408 and The sludge chamber 5 includes a sludge return pump 501, a sludge discharge pump 502, a bottom sludge discharge pipe 503, a sludge return pipe 504, a sludge discharge pipe 505, and a sludge mixer 506. The ultrafine pulverized carbon dosing chamber 1 is connected to the high-efficiency mixing and flocculation tank 201 via a rectangular flow guide pipe 202. The ozone pipe 303 is connected to the pressure dissolved air tank 402, which feeds dissolved ozone and air into the ozone contact chamber 3 via an ozone diffuser 301 and an air dosing pipe 302. The high-efficiency mixing and flocculation tank 201 is connected to the ozone contact chamber 3 via a water weir, and the ozone contact chamber 3 is connected to the flotation-ultrafiltration membrane chamber 4 via a downward and upward baffles. Ultrafine pulverized carbon and flocculant are added to the water inlet via ultrafine pulverized carbon injection pipe 103 and flocculant injection pipe 102, respectively. After mixing in first agitator 101, the mixture enters high-efficiency mixing and flocculation chamber 2 for reaction. Ultrafine pulverized carbon-containing sludge at the bottom of the membrane tank is collected via bottom sludge discharge pipe 503 and returned to sludge chamber 5. The return sludge from sludge chamber 5 is returned to ultrafine pulverized carbon injection chamber 1 via sludge return pipe 504 and sludge return pump 501. The discharged sludge is then discharged to the sludge system via sludge discharge pipe 505 and sludge discharge pump 502.

[0026] The flotation-ultrafiltration membrane chamber 4 also includes a flotation skimmer 410 and a skimmer trough 411. The flotation skimmer 410 removes suspended particles and oily particles that float to the surface due to bubbles, and this skimmer 410 removes these particles to the skimmer trough 411. The flotation-ultrafiltration membrane chamber 4 also serves as an ozone reaction chamber. The materials used for the flotation skimmer 410, ultrafiltration membrane assembly 401, and underwater pipe fittings should be resistant to ozone corrosion.

[0027] See Figure 3 As shown, the high-efficiency mixing and flocculation barrel 201 is cylindrical and suspended at the bottom of the high-efficiency mixing and flocculation chamber 2. A rectangular flow guide 202 is provided at the bottom of the high-efficiency mixing and flocculation chamber 2 as the water inlet. The rectangular flow guide 202 extends approximately 30 centimeters into the flocculation barrel. The high-efficiency mixing and flocculation barrel 201 can be made of stainless steel or other materials resistant to chemical corrosion. Specifically, the rectangular flow guide 202 is welded to an L-shaped steel 204, which is secured to the tank bottom using expansion bolts.

[0028] The ultrafiltration membrane adopts physical cleaning and chemical cleaning. Physical cleaning adopts physical backwashing, which is specifically achieved through the air pressure water tank 404. The lower part of the air pressure water tank 404 is flushing water, and the upper part is air. The air compressor instantly adds pressurized air to the top of the water tank to achieve rapid air aeration and washing of the membrane pool.

[0029] This purification unit is integrated, but each process section can operate independently, allowing for selective process startup and shutdown, and adjustment of reagent dosage, based on the water quality characteristics of the water being treated. When the levels of organic matter, odorous substances, and color in the water being treated are low, the dosage of powdered activated carbon and ozone can be reduced or even stopped. When the turbidity in the water being treated is low, the dosage of coagulant in the high-efficiency flocculation tank can be reduced. When the water quality is excellent (such as spring water or stream water), the flotation machine can be further deactivated, and a short process of "microflocculation-ozone-ultrafiltration" or "microflocculation-ultrafiltration membrane" can be used for water purification. Therefore, rationally adjusting process control based on the influent water quality is the key to reducing costs and increasing efficiency while ensuring effective purification.

[0030] This device adds ultrafine powdered carbon, high-efficiency flocculation, ozone, and sludge reflux processes to the common flotation ultrafiltration membrane, integrating an ultrafine powdered carbon dosing chamber, a high-efficiency mixing and flocculation chamber, an ozone contact chamber, an air flotation-ultrafiltration membrane chamber, and a sludge chamber. Ultrafine powdered carbon is added to the water inlet, reacts in the high-efficiency mixing and flocculation barrel, and then enters the flotation-ultrafiltration membrane process section through the ozone contact chamber. The flotation-produced water is returned to the pressure dissolved air tank, and the ultrafine powdered carbon sludge at the bottom of the membrane pool is returned to the front end of the process. The ultrafiltration membrane effluent enters the water production pool. Through the ultrafine powdered carbon-high-efficiency flocculation-ozone-flotation-ultrafiltration-bottom mud return process, the effluent water quality is excellent: the ultrafine powdered carbon and ozone can effectively adsorb and oxidize organic matter, odorous substances and color; the high-efficiency flocculation has good hydraulic flow and mechanical flocculation effect, which reduces the dosage of chemicals, effectively removes turbidity, and further controls the membrane pollution of the ultrafiltration membrane, reducing the cleaning frequency; flotation effectively removes algae and tiny particles; the ultrafiltration membrane can further reduce turbidity and two insect microorganisms; the powdered carbon bottom mud return promotes the formation of floccules, realizes the internal resource recycling of the device, and is low-carbon and environmentally friendly. The integrated device has a high degree of integration, is applicable to a wide range of water volumes, has few restrictions on influent water quality, and has good treatment effects on high-algae water, high-turbidity water, high-organic matter water and industrial wastewater.

[0031] The above are only preferred embodiments of the present invention and do not limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-efficiency mixed flocculation flotation ozone membrane filtration purification device, characterized in that: It includes an ultrafine pulverized carbon dosing chamber, a high-efficiency mixing and flocculation chamber, an ozone contact chamber, an air flotation-ultrafiltration membrane chamber and a sludge chamber. The high-efficiency mixing and flocculation chamber includes a high-efficiency mixing and flocculation barrel. The ultrafine pulverized carbon dosing chamber, the high-efficiency mixing and flocculation barrel, the ozone contact chamber and the air flotation-ultrafiltration membrane chamber are connected in sequence. The air flotation-ultrafiltration membrane chamber includes an ultrafiltration membrane assembly, a pressure dissolved air tank and a water production pool. Ultrafine pulverized carbon and flocculants are added to the water inlet end, enter the high-efficiency mixing and flocculation chamber for reaction after mixing, and then enter the air flotation-ultrafiltration membrane chamber from the ozone contact chamber. The flotation water flows back to the pressure dissolved air tank for recycling, and the ultrafiltration membrane effluent flows into the water production pool. The ultrafine pulverized carbon sludge at the bottom of the membrane pool flows back to the sludge chamber and then back to the ultrafine pulverized carbon dosing chamber.

2. The high-efficiency mixed flocculation flotation ozone membrane filtration purification device according to claim 1, characterized in that: The ultrafine pulverized carbon dosing chamber includes a first mixer, a flocculant dosing pipe, an ultrafine pulverized carbon dosing pipe and a water inlet pipe. The high-efficiency mixing and flocculation chamber also includes a rectangular guide pipe and a second mixer. The ozone contact chamber includes an ozone diffuser, an air dosing pipe and an ozone pipeline. The flotation-ultrafiltration membrane chamber also includes a pressure water tank, a back-dissolution water pump, a water production pipe, a backwash water pipe, a back-dissolution water pipe and a water production suction pump. The sludge chamber includes a bottom mud return pump, a bottom mud discharge pump, a bottom mud discharge pipe, a bottom mud return pipe, a bottom mud discharge pipe and a sludge mixer. The ultrafine pulverized carbon dosing chamber is connected to the high-efficiency mixing and flocculation barrel through the rectangular guide pipe. The ozone pipeline is connected to the pressure dissolved air tank. The pressure dissolved air tank adds dissolved ozone and air to the ozone contact chamber through the ozone diffuser and the air dosing pipe.

3. The high-efficiency mixed flocculation flotation ozone membrane filtration purification device according to claim 2, characterized in that: The air flotation-ultrafiltration membrane chamber further comprises an air flotation skimmer and a skimmer tank. The air flotation skimmer skims suspended particles and oily particles that float up due to adhering to air bubbles into the skimmer tank.

4. The high-efficiency mixed flocculation flotation ozone membrane filtration purification device according to claim 3, characterized in that: The flotation skimmer and the ultrafiltration membrane assembly are vertically spaced and overlapped.

5. The high-efficiency mixed flocculation flotation ozone membrane filtration purification device according to claim 2, characterized in that: The ultrafiltration membrane adopts physical cleaning and chemical cleaning. Physical cleaning realizes physical backwashing through the air pressure water tank. The lower part of the air pressure water tank is flushing water, and the upper part is air. The air compressor instantly adds pressurized air to the top of the air pressure water tank to realize rapid air aeration washing of the membrane pool.

6. The high-efficiency mixed flocculation flotation ozone membrane filtration purification device according to claim 1, characterized in that: The reflux ratio of the ultrafine pulverized carbon sludge at the bottom of the membrane pool back to the ultrafine pulverized carbon dosing chamber is 5-10%.

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