CN214360722U - Air-flotation membrane filtration system for treating industrial wastewater - Google Patents
Air-flotation membrane filtration system for treating industrial wastewater Download PDFInfo
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- CN214360722U CN214360722U CN202120182845.2U CN202120182845U CN214360722U CN 214360722 U CN214360722 U CN 214360722U CN 202120182845 U CN202120182845 U CN 202120182845U CN 214360722 U CN214360722 U CN 214360722U
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- 238000005374 membrane filtration Methods 0.000 title claims abstract description 24
- 239000010842 industrial wastewater Substances 0.000 title claims abstract description 21
- 238000005188 flotation Methods 0.000 title claims description 14
- 239000012528 membrane Substances 0.000 claims abstract description 73
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 73
- 239000002351 wastewater Substances 0.000 claims abstract description 35
- 238000007790 scraping Methods 0.000 claims abstract description 13
- 238000005189 flocculation Methods 0.000 claims abstract description 9
- 230000016615 flocculation Effects 0.000 claims abstract description 9
- 238000005192 partition Methods 0.000 claims abstract description 5
- 239000000919 ceramic Substances 0.000 claims description 20
- 229920000742 Cotton Polymers 0.000 claims description 19
- 238000001914 filtration Methods 0.000 claims description 19
- 239000002893 slag Substances 0.000 claims description 19
- 238000001223 reverse osmosis Methods 0.000 claims description 15
- 238000011001 backwashing Methods 0.000 claims description 11
- 239000008394 flocculating agent Substances 0.000 claims description 7
- 239000010802 sludge Substances 0.000 claims description 7
- 238000004065 wastewater treatment Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 12
- 239000003921 oil Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 239000000126 substance Substances 0.000 description 8
- 238000007667 floating Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 230000006837 decompression Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000009300 dissolved air flotation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a handle industrial waste water's air supporting membrane system of straining, relates to waste water treatment technical field, mainly includes air supporting treatment module and membrane filtration treatment module, and industrial waste water passes through the air supporting treatment module and gets rid of behind the dross through the membrane filtration treatment module and purifies in order to reach the waste water treatment purpose. The air floatation treatment module mainly comprises an air floatation tank with an opening at the top, a residue scraping machine and a residue collecting groove, wherein a flocculation chamber and a contact chamber are formed in one side of the air floatation tank through a partition plate, the residue scraping machine is arranged at the top of the air floatation tank, and the residue collecting groove is arranged outside the air floatation tank and is positioned on one side of the end part of the residue scraping machine. The utility model discloses combine air supporting and membrane filtration technology, wherein the membrane is strained and is adopted series connection and parallelly connected mode, can be used for handling low concentration industrial waste water, also can handle high concentration waste water, and area is little simultaneously, simple structure, and the civil engineering cost is low, and anti load capacity is big, and the rate of water consumption is low certainly, and the running cost is low, and automatic control is simple.
Description
Technical Field
The utility model relates to a waste water treatment technical field specifically is a system is strained to air supporting membrane of handling industrial waste water.
Background
In the industrial production process, waste water such as emulsion, cleaning fluid and the like is discharged, the concentration of organic matters in the waste water is high, and meanwhile, domestic sewage in a factory is discharged, and the concentration of the domestic sewage is low. The waste emulsion is high-concentration oily wastewater, the water quality components are complex, the concentrations of COD, oils, SS and the like are high, the stability of oil and milk is good, pungent odor is generated, the waste emulsion is difficult to treat, and the environment is seriously polluted if the waste emulsion is directly discharged without treatment.
At present, domestic treatment of high-concentration industrial wastewater still has some problems, and many combined treatment processes can reduce COD to thousands of mg/L, but the treatment efficiency is difficult to further improve or the treatment effect is unstable.
The utility model analyzes and discusses the treatment effect of the air flotation-membrane filtration process on the industrial wastewater, and provides reference for the popularization and application of the process.
SUMMERY OF THE UTILITY MODEL
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a handle industrial waste water's air supporting membrane system of straining, includes air supporting processing module and membrane filtration processing module, wherein:
the air floatation treatment module comprises an air floatation tank with an opening at the top, a slag scraping machine and a slag collecting groove, wherein a flocculation chamber and a contact chamber are formed in one side of the air floatation tank through a partition plate, the slag scraping machine is arranged at the top of the air floatation tank, and the slag collecting groove is arranged outside the air floatation tank and is positioned at one side of the end part of the slag scraping machine;
the wastewater inlet pipe and the flocculating agent inlet pipe are connected with a flocculation chamber of the air floatation tank, and the water outlet end of the air floatation tank is connected with a water collecting pipe and a backflow clear water pipe;
the membrane filtration treatment module consists of an organic PP cotton filtration membrane component, a reverse osmosis membrane component and a tubular ceramic membrane component; the organic PP cotton filtering membrane component and the reverse osmosis membrane component are arranged in parallel, the water inlet end of the organic PP cotton filtering membrane component is connected with the water collecting pipe and the backflow clear water pipe, and the water outlet end of the organic PP cotton filtering membrane component is connected with the water inlet end of the tubular ceramic membrane component or directly connected with the water outlet pipeline; the water outlet end of the tubular ceramic membrane component is connected with a water outlet pipeline.
As an optimized technical proposal of the utility model, the slag collecting groove is connected with a sludge pump.
As an optimal technical scheme of the utility model, collector pipe and backward flow clean water pipe are connected through the entry end that the gas pitcher was dissolved to the pressurized water pump and pressure, the exit end that the gas pitcher was dissolved to pressure advances pipe, flocculating agent through valve and waste water and advances union coupling.
As a preferred technical scheme of the utility model, the entry end of pressure dissolves the gas pitcher still is connected with air and advances pipe and release valve.
As an optimal technical scheme of the utility model, outlet conduit passes through the valve and is connected with the end of intaking of circulating pump, the play water end and the waste water of circulating pump advance the union coupling.
As an optimal technical scheme of the utility model, outlet conduit passes through the valve and is connected with the end of intaking of backwash tank, the outlet end of backwash tank is connected with the end of intaking of backwash pump, the outlet end of backwash pump is connected with the outlet end of the cotton filter membrane subassembly of organic PP, reverse osmosis membrane subassembly and tubular ceramic membrane subassembly respectively.
As an optimal technical scheme of the utility model, still include PCL automatic control system to the switching of valve on each subassembly pipeline is got into in control.
Compared with the prior art, the utility model provides a system is strained to air supporting membrane of handling industrial waste water possesses following beneficial effect:
1) the air flotation type adopted by the system is partial reflux pressurization dissolved air flotation, in the process, partial clear liquid is refluxed and pressurized, inflow wastewater directly enters the air flotation tank, the method saves power consumption compared with a full pressurization process, and meanwhile, the volume of the pressurized dissolved air water and the volume of a dissolved air tank are smaller than that of the full pressurization dissolved air mode, so some equipment can be saved. The pressurized dissolved air water in the process is clarified water subjected to air floatation treatment, and is favorable for dissolved air and decompression release.
2) The parallel membrane modules selected by the system are an organic PP cotton filtering membrane and a reverse osmosis membrane. The organic PP cotton filtering membrane can remove larger suspended matters of particles, can keep stable flux for a long time aiming at wastewater with high pollution degree and turbidity, has poor deoiling effect and is easy to block, but is used as a security filter of a ceramic membrane filtering system to remove the pollutants with high viscosity such as large suspended matters and the like for the subsequent process, so that the treatment speed is greatly improved.
3) The principle of reverse osmosis membrane technology is that under the action of osmotic pressure higher than that of solution, other substances cannot permeate a semipermeable membrane to separate the substances from water. The reverse osmosis membrane has a very small membrane pore size, and thus can effectively remove dissolved salts, colloids, microorganisms, organic substances, and the like in water. The system has the advantages of good water quality, low energy consumption, no pollution, simple process, simple and convenient operation and the like.
4) The ceramic membrane in series connection selected by the system is a tubular ceramic membrane. The tubular ceramic membrane can resist acid, alkali and high temperature, has good chemical stability, and can well separate oil substances in the wastewater. The ceramic membrane filtration has good removal effect on the wastewater with high oil content, the removal rate of oil can reach about 85 percent, the operation is simple and convenient, and the oil can be effectively recovered without adding any chemical auxiliary agent. The wastewater enters a tubular ceramic membrane device, the wastewater flows at a high speed in a membrane tube, the small molecular solution such as water and the like is driven by pressure to penetrate through the membrane outwards along the direction vertical to the membrane, and the macromolecular substances such as oil and the like are intercepted by the membrane, so that the purpose of oil-water separation is achieved. However, the oily wastewater is characterized by high pollution, high mineralization and high suspended matter, and if the oily wastewater is treated, the flux can be greatly reduced, so that the thickness of a filter cake layer is rapidly increased under a higher pressure difference, and the treatment efficiency is influenced.
5) After the pretreatment PP cotton is added for safe filtration, the oil removal efficiency can be improved to more than 93 percent, the treatment flux is also greatly improved, the backwashing frequency is obviously reduced, and particularly, the treatment flux after cleaning is basically recovered to the original level. It is likely that the contaminants accumulated in the cake layer on the membrane surface are small particles that are easily washed away.
Drawings
FIG. 1 is a schematic structural view of the air-floating membrane filtration system for treating industrial wastewater.
In the figure: the device comprises a wastewater inlet pipe-1, a flocculating agent inlet pipe-2, an air inlet pipe-3, a pressure dissolved air tank-4, a pressure water pump-5, an air release valve-6, an air flotation tank-7, a contact chamber-8, a flocculation chamber-9, a slag scraping machine-10, a water collecting pipe, a backflow clear water pipe-11, a slag collecting tank-12, a sludge pump-13, an organic PP cotton filtering membrane component-14, a reverse osmosis membrane component-15, a tubular ceramic membrane component-16, a circulating pump-17, a backwashing tank-18, a backwashing pump-19, a PCL automatic control system-20 and a partition plate-21.
Detailed Description
Referring to fig. 1, the present invention provides an air-floating membrane filtration system for treating industrial wastewater, which mainly comprises an air-floating treatment module and a membrane filtration treatment module, wherein the industrial wastewater is purified by the membrane filtration treatment module after scum is removed by the air-floating treatment module to achieve the purpose of wastewater treatment.
The air floatation treatment module mainly comprises an air floatation tank 7 with an opening at the top, a slag scraping machine 10 and a slag collecting groove 12, wherein a flocculation chamber 9 and a contact chamber 8 are formed in one side of the air floatation tank 7 through a partition plate 21, the slag scraping machine 10 is arranged at the top of the air floatation tank 7, and the slag collecting groove 12 is arranged outside the air floatation tank 7 and is positioned at one side of the end part of the slag scraping machine 10.
The wastewater inlet pipe 1 and the flocculating agent inlet pipe 2 are converged and then enter a flocculation chamber 9 of an air floatation tank 7 under the action of airflow ejected by a pressure dissolved air tank 4 to form a water-air-particle three-phase mixed system, floating flocs with the surface density smaller than that of water are formed after particles are adhered with air bubbles, the flocs float up to the water surface from a contact chamber 8 to form a scum layer, the scum layer is scraped to a scum collecting tank 12 by a scum scraper 10 to realize solid-liquid separation, and scum in the scum collecting tank 12 is discharged into a sludge system through a sludge pump 13; the clarified water after the air floatation treatment is discharged to a membrane filtration treatment module or flows back to a pressure dissolved air tank 4 through a water collecting pipe and a backflow clarified water pipe 11 which are communicated with the water outlet end of the air floatation tank 7.
The clarified water after air floatation treatment flows back to a pressurizing water pump 5 and enters a pressure dissolved air tank 4 for backflow pressurization, an air inlet pipe 3 injects air into the pressure dissolved air tank 4, and the pressure dissolved air tank 4 provides airflow for an air floatation tank 7 to form air floatation micro-bubbles; when the pressure of the pressure dissolved air tank 4 is too high, the air escape valve 6 is opened, and the decompression is released.
The membrane filtration treatment module consists of an organic PP cotton filtration membrane component 14, a reverse osmosis membrane component 15 and a tubular ceramic membrane component 16, wherein clarified water subjected to air flotation treatment enters one of the organic PP cotton filtration membrane component 14 and the reverse osmosis membrane component 15 which are connected in parallel, and is directly discharged after treatment or enters the tubular ceramic membrane component 16 for further treatment.
The water outlet end of the membrane filtration treatment module is connected with a backwashing tank 18 for storing clear water, a chemical cleaning agent is added and then pressed into the organic PP cotton filtration membrane module 14, the reverse osmosis membrane module 15 and the tubular ceramic membrane module 16 through a backwashing pump 19 to clean the membrane modules, and the cleaned wastewater enters the circulating pump 17 and is merged into the wastewater inlet pipe 1 and then enters the air flotation tank 7 for secondary treatment.
The wastewater treatment process of the utility model is as follows:
the method comprises the following steps: the waste water enters an air floatation tank, a flocculating agent is added simultaneously, a pressure dissolved air tank provides enough fine bubbles for the water, after the flocculating agent is added and coagulated, flocs formed by a flocculation chamber and the fine bubbles are adhered in a contact chamber to form a water-gas-particle three-phase mixed system, after the bubbles are adhered to particles, floating flocs with the surface density smaller than that of the water are formed, the flocs float to the water surface to form a scum layer, and the scum layer is scraped to a scum collecting tank by a scum scraper, so that solid-liquid separation is realized. Scum in the scum collecting tank is discharged into a sludge system through a sludge pump.
Step two: the clarified water after air floatation treatment flows back to the pressurizing water pump through the water collecting pipe and the backflow clarified water pipe, and the backflow pressurizing is favorable for the processes of dissolved air and decompression release. Air is injected into the pressure dissolved air tank to provide micro bubbles for the air floatation tank, and when the pressure is too high, the air escape valve is opened to reduce the pressure and release.
Step three: the effluent of the air flotation tank enters a membrane filtration system, when the concentration of the wastewater is low and the oil content is low, a valve is opened, the wastewater enters an organic PP cotton filtration membrane component, and the relevant valve is closed to directly discharge the water. When the concentration of the wastewater is high and the oil content is low, the related valves are opened, so that the wastewater enters the organic PP cotton filtering membrane module and the tubular ceramic membrane module to reach the effluent standard. When the concentration of the wastewater is low and the oil content is high, the related valve is opened, so that the wastewater enters the reverse osmosis membrane component and directly goes out. When the concentration of the wastewater is high and the oil content is high, the related valves are opened, so that the wastewater enters the reverse osmosis membrane component and the tubular ceramic membrane component, and the wastewater reaches the effluent standard. The three membrane modules can be recycled, the damage rate is reduced, and the wastewater treatment efficiency is improved.
Step four: when the concentration of the membrane filtered water is low and the purification effect is good, clear water is stored in the backwashing tank, a chemical cleaning agent is added, and the clear water enters the backwashing pump to clean the membrane component. And (4) the cleaned wastewater enters the air floatation tank through a circulating pump and is treated again.
Step five: an automatic control system: when the system is started, the PCL automatic control system detects the concentration of the wastewater and opens or closes the related valve.
To sum up, the utility model discloses combine air supporting and membrane filtration technology, wherein the membrane is strained and is adopted series connection and parallelly connected mode, can be used for handling low concentration industrial waste water, also can handle high concentration waste water, and area is little simultaneously, simple structure, and the civil engineering cost is low, and anti load capacity is big, and the water rate is hanged down certainly, and the running cost is low, and automatic control is simple.
The above, only be the concrete implementation of the preferred embodiment of the utility model, but the protection scope of the utility model is not limited thereto, and any technical personnel familiar with this technical field should be covered within the protection scope of the utility model in the technical scope of the utility model discloses, according to the technical scheme of the utility model and the utility model conception equivalence substitution or change.
Claims (7)
1. The utility model provides a handle industrial waste water's air supporting membrane system of straining which characterized in that, strains processing module including air supporting processing module and membrane, wherein:
the air floatation treatment module comprises an air floatation tank (7) with an opening at the top, a slag scraping machine (10) and a slag collecting groove (12), wherein a flocculation chamber (9) and a contact chamber (8) are formed in one side of the air floatation tank (7) through a partition plate (21), the slag scraping machine (10) is arranged at the top of the air floatation tank (7), and the slag collecting groove (12) is arranged outside the air floatation tank (7) and is positioned at one side of the end part of the slag scraping machine (10);
the wastewater inlet pipe (1) and the flocculating agent inlet pipe (2) are connected with a flocculation chamber (9) of the air floatation tank (7), and the water outlet end of the air floatation tank (7) is connected with a water collecting pipe and a backflow clear water pipe (11);
the membrane filtration treatment module consists of an organic PP cotton filtration membrane component (14), a reverse osmosis membrane component (15) and a tubular ceramic membrane component (16); the organic PP cotton filtering membrane component (14) and the reverse osmosis membrane component (15) are arranged in parallel, the water inlet end of the organic PP cotton filtering membrane component is connected with the water collecting pipe and the backflow clear water pipe (11), and the water outlet end of the organic PP cotton filtering membrane component is connected with the water inlet end of the tubular ceramic membrane component (16) or directly connected with a water outlet pipeline; the water outlet end of the tubular ceramic membrane component (16) is connected with a water outlet pipeline.
2. The air-flotation membrane filtration system for treating industrial wastewater according to claim 1, wherein the slag collection tank (12) is connected with a sludge pump (13).
3. The air-flotation membrane filtration system for treating industrial wastewater as claimed in claim 1, wherein the water collecting pipe and the return clear water pipe (11) are connected with the inlet end of the pressure dissolved air tank (4) through a water pressure pump (5), and the outlet end of the pressure dissolved air tank (4) is connected with the wastewater inlet pipe (1) and the flocculant inlet pipe (2) through valves.
4. The air-flotation membrane filter system for treating industrial wastewater as claimed in claim 3, wherein the inlet end of the pressure dissolved air tank (4) is further connected with an air inlet pipe (3) and an air release valve (6).
5. The air-flotation membrane filtration system for treating industrial wastewater as claimed in claim 1, wherein the water outlet pipeline is connected with the water inlet end of a circulating pump (17) through a valve, and the water outlet end of the circulating pump (17) is connected with the wastewater inlet pipe (1).
6. The air-flotation membrane filtration system for treating industrial wastewater as claimed in claim 1, wherein the water outlet pipeline is connected with the water inlet end of a backwashing tank (18) through a valve, the water outlet end of the backwashing tank (18) is connected with the water inlet end of a backwashing pump (19), and the water outlet end of the backwashing pump (19) is respectively connected with the water outlet ends of the organic PP cotton filtration membrane assembly (14), the reverse osmosis membrane assembly (15) and the tubular ceramic membrane assembly (16).
7. The air-flotation membrane filtration system for treating industrial wastewater according to any one of claims 1 to 6, further comprising a PCL automatic control system (20) for controlling the opening and closing of valves on the pipelines of each component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120182845.2U CN214360722U (en) | 2021-01-23 | 2021-01-23 | Air-flotation membrane filtration system for treating industrial wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120182845.2U CN214360722U (en) | 2021-01-23 | 2021-01-23 | Air-flotation membrane filtration system for treating industrial wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214360722U true CN214360722U (en) | 2021-10-08 |
Family
ID=77959635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120182845.2U Expired - Fee Related CN214360722U (en) | 2021-01-23 | 2021-01-23 | Air-flotation membrane filtration system for treating industrial wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214360722U (en) |
-
2021
- 2021-01-23 CN CN202120182845.2U patent/CN214360722U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211008 |