CN220098662U - Ceramic membrane wastewater treatment system applied to fluidized bed hardness removal process - Google Patents
Ceramic membrane wastewater treatment system applied to fluidized bed hardness removal process Download PDFInfo
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- CN220098662U CN220098662U CN202321612651.7U CN202321612651U CN220098662U CN 220098662 U CN220098662 U CN 220098662U CN 202321612651 U CN202321612651 U CN 202321612651U CN 220098662 U CN220098662 U CN 220098662U
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- ceramic membrane
- treatment system
- wastewater treatment
- membrane
- fluidized bed
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- 239000012528 membrane Substances 0.000 title claims abstract description 176
- 239000000919 ceramic Substances 0.000 title claims abstract description 153
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002351 wastewater Substances 0.000 claims abstract description 23
- 238000004062 sedimentation Methods 0.000 claims abstract description 17
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 239000012535 impurity Substances 0.000 claims abstract description 13
- 239000011148 porous material Substances 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 96
- 238000004140 cleaning Methods 0.000 claims description 22
- 238000011010 flushing procedure Methods 0.000 claims description 20
- 239000000126 substance Substances 0.000 claims description 9
- 238000005374 membrane filtration Methods 0.000 claims description 8
- 239000012459 cleaning agent Substances 0.000 claims description 7
- 238000000746 purification Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 150000002500 ions Chemical class 0.000 description 10
- 239000000243 solution Substances 0.000 description 6
- 239000013078 crystal Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000005708 Sodium hypochlorite Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000002455 scale inhibitor Substances 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Abstract
The utility model provides a ceramic membrane wastewater treatment system applied to a fluidized bed hardness removal process, which is characterized by comprising ceramic membrane filtering equipment for filtering flocculent impurities in wastewater and a sedimentation tank for separating out particle impurities from the fluidized bed, wherein the ceramic membrane filtering equipment comprises at least one ceramic membrane and a membrane tank, the ceramic membrane is provided with membrane holes, and the pore diameter of the membrane holes is smaller than the diameter of the flocculent impurities; the front end of ceramic membrane is connected with the membrane pond, the membrane pond is connected with the sedimentation tank, improves the purifying effect of waste water.
Description
Technical Field
The utility model belongs to the field of wastewater treatment, and particularly relates to a ceramic membrane wastewater treatment system applied to a fluidized bed hardness removal process.
Background
For industrial circulating water, hardness ions in the industrial circulating water scale on the surface of the heat exchanger, so that the heat exchange efficiency of the heat exchanger in the industrial circulating water is reduced, the operation energy consumption of the system is increased, and the service life of the heat exchanger is shortened. At present, a mode of adding a scale inhibitor into industrial circulating water is often adopted to slow down the scale formation of hardness ions on the surface of a heat exchanger, and meanwhile, the hardness ions in the industrial circulating water are maintained in a mode of periodically draining and supplementing water, but the scale removal is carried out by adopting the scale inhibitor, so that the hardness ions in the industrial circulating water can be separated out in a crystal form by adopting a fluidized bed hardness removal technology, and further the scale is removed, but a small amount of hardness ions exist in the industrial circulating water in a floc form in the technology, so that the floc hardness ions cannot be intercepted and removed, and the surface of the heat exchanger is easily scaled, so that the development of a wastewater treatment system for effectively removing the floc impurities in the industrial circulating water is needed to be urgently developed.
Disclosure of Invention
The utility model aims to provide a ceramic membrane wastewater treatment system with efficient filtration.
In order to achieve the above object, the main technical solution of the present utility model is to provide a ceramic membrane wastewater treatment system applied to a fluidized bed hardness removal process, the ceramic membrane wastewater treatment system comprising a ceramic membrane filtration device for filtering flocculent impurities in wastewater and a sedimentation tank for separating out particulate impurities in the fluidized bed, the ceramic membrane filtration device comprising at least one ceramic membrane and a membrane tank, the ceramic membrane having membrane pores with a pore diameter smaller than the diameter of the flocculent impurities; the front end of the ceramic membrane is connected with a membrane tank, and the membrane tank is connected with a sedimentation tank.
In some examples, the ceramic membrane filtration device further comprises a first water pump connected to the ceramic membrane, the ceramic membrane having an internal and external pressure differential of 5 to 30Kpa.
In some examples, the ceramic membrane wastewater treatment system further comprises a second water pump, one end of the second water pump is connected with the sedimentation tank, and the other end of the second water pump is connected with the membrane tank.
In some examples, the second water pump employs a tube centrifugal pump or a slurry pump.
In some examples, the ceramic membrane wastewater treatment system further comprises a wastewater purification device comprising a buffer tank and a third water pump connected to an outlet end of the buffer tank, a water inlet end of the buffer tank being connected to a rear end of the ceramic membrane.
In some examples, the ceramic membrane wastewater treatment system further comprises a fourth water pump, one end of the fourth water pump is communicated with the buffer pool, the other end of the fourth water pump is arranged at the front end of the ceramic membrane, when the turbidity of the water discharged from the rear end of the ceramic membrane is greater than or equal to 1nut, the fourth water pump is started, and filtered water in the buffer pool is conveyed to the ceramic membrane again for filtration.
In some examples, the ceramic membrane wastewater treatment system further comprises a cleaning system for cleaning the ceramic membrane, the cleaning system comprising one or more combinations of gas flushing, hydraulic backwash, and chemical cleaning.
In some examples, when the ceramic membrane wastewater treatment system is flushed with gas, the ceramic membrane wastewater treatment system further comprises an air compressor, the air injection end of the air compressor is positioned at the bottom outside the ceramic membrane; or when the ceramic membrane wastewater treatment system adopts hydraulic back flushing, the ceramic membrane wastewater treatment system also comprises a back flushing pump, one end of the back flushing pump is connected with the buffer tank, and the other end of the back flushing pump is positioned at the front end of the ceramic membrane; or when the ceramic membrane wastewater treatment system adopts chemical cleaning, the ceramic membrane wastewater treatment system comprises a cleaning agent, and the ceramic membrane is cleaned by the cleaning agent.
In some examples, the ceramic membrane is a flat ceramic membrane.
In some examples, the ceramic membrane wastewater treatment system further comprises a control unit, a water inlet flow meter, a water outlet flow meter, a vacuum meter and an online turbidity meter, wherein the water inlet flow meter is arranged at the front end of the ceramic membrane, the water outlet flow meter is arranged at the rear end of the ceramic membrane, the vacuum meter is arranged at the inner side of the ceramic membrane, the online turbidity meter is arranged at the rear end of the ceramic membrane, and the water inlet flow meter, the water outlet flow meter, the vacuum meter and the online turbidity meter are electrically connected with the control unit.
Drawings
Figure 1 is a schematic diagram of an embodiment of the present utility model,
fig. 2 is a flow chart of the embodiment of fig. 1.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the utility model, fall within the scope of protection of the utility model.
The utility model provides a ceramic membrane wastewater treatment system, which is applied to a fluidized bed hardness removal system, wherein the fluidized bed hardness removal system can separate hardness ions in industrial circulating water from the circulating water in a crystal form, but a small amount of hardness ions still exist in the industrial circulating water in a floccule form, and if only a sedimentation tank 1 is arranged, the floccule generated after the fluidized bed hardness removal is difficult to effectively intercept, so that the industrial circulating water is influenced.
In order to solve the problems, the utility model adopts the ceramic membrane to filter the hardness ions of the flocs, so as to better treat and filter the wastewater.
Specifically, the ceramic membrane wastewater treatment system comprises ceramic membrane filtration equipment for filtering flocculent impurities in wastewater and a sedimentation tank 1 for separating out particle impurities from a fluidized bed, wherein the ceramic membrane filtration equipment comprises at least one ceramic membrane 11 and a membrane tank 5, the ceramic membrane 11 is provided with membrane pores, and the pore diameter of the membrane pores is smaller than the diameter of the flocculent impurities; the front end of the ceramic membrane 11 is connected with the membrane tank 5, and the membrane tank 5 is connected with the sedimentation tank 1; in the scheme, wastewater is poured into a sedimentation tank 1 for first sedimentation filtration, in other words, hardness ions precipitated from the wastewater poured into the sedimentation tank 1 are in a crystal form, the crystal is sunk into the tank bottom, the wastewater containing flocs flows into a membrane tank, the wastewater in the membrane tank 5 flows through a ceramic membrane 11 for second membrane filtration, and the flocs can be effectively intercepted outside the ceramic membrane 11 due to the fact that the pore diameter of a membrane hole is smaller than the diameter of the flocs, and the wastewater flowing out of the ceramic membrane 11 is collected again.
In the above embodiment, in order to enable the wastewater in the membrane tank 5 to flow into the ceramic membrane 11 more smoothly, the ceramic membrane filtration device further includes a first water pump 8, the first water pump 8 is connected to the ceramic membrane 11, the internal and external pressure difference of the ceramic membrane 11 is 5-30 Kpa, the first water pump 8 is turned on, and the wastewater is driven to pass through the ceramic membrane 11, so as to achieve the interception of the flocs indicated by the ceramic membrane 11.
In this embodiment, the ceramic membrane wastewater treatment system further includes a second water pump 2, one end of the second water pump 2 is connected with the sedimentation tank 1, the other end of the second water pump 2 is connected with the membrane tank, the second water pump 2 is a water inlet pump, the second water pump 2 acts on the wastewater containing the flocs in the sedimentation tank 1 to be introduced into the membrane tank, the second water pump 2 can adopt a tubular centrifugal pump and a slurry pump, and by setting the second water pump 2, the wastewater in the sedimentation tank 1 can be continuously introduced into the membrane tank 5 without manual work or adopting a high-low difference flow.
In addition, in this embodiment, in order to further purify the wastewater, further prevent the turbidity of the effluent of the ceramic membrane 11 from being greater than or equal to 1NUT, the ceramic membrane wastewater treatment system further comprises a wastewater purification device, the wastewater purification device comprises a buffer tank 9, a third water pump 10 and a fourth water pump 12, the third water pump 10 is connected with the outlet end of the buffer tank 9, the water inlet end of the buffer tank 9 is connected with the rear end of the ceramic membrane 11, one end of the fourth water pump 12 is connected with the buffer tank 9, the other end of the fourth water pump 12 is arranged at the front end of the ceramic membrane 11, when the turbidity of the effluent of the rear end of the ceramic membrane 11 is greater than or equal to 1NUT, the fourth water pump 12 is started, the filtered water in the buffer tank 9 is conveyed to the ceramic membrane 11 again for filtration until the turbidity of the effluent of the ceramic membrane 11 is less than 1NUT, the fourth water pump 12 is closed, and the wastewater in the buffer tank 9 is not required to be conveyed to the front end of the ceramic membrane 11 again, and the fourth water pump 12 is used for discharging the wastewater in the buffer tank 9; in addition, the buffer reservoir 9 provides a water source for the hydraulic back flushing of the ceramic membranes 11 in addition to the effects described in detail below.
In this embodiment, the ceramic membrane wastewater treatment system further includes a cleaning system for cleaning the ceramic membrane 11, the cleaning system including one or more combinations of gas flushing, hydraulic back flushing and chemical cleaning, the cleaning system being capable of effectively cleaning the ceramic membrane 11, on the one hand, preventing clogging of the ceramic membrane 11, and on the other hand, effectively recovering the transmembrane pressure difference of the ceramic membrane 11 to 5 to 15Kpa; specifically, three cleaning schemes are adopted in the embodiment, wherein when the first scheme is that a ceramic membrane wastewater treatment system adopts gas flushing, the ceramic membrane wastewater treatment system further comprises an air compressor 3, an air injection end of the air compressor 3 is positioned at the bottom of the outer side of a ceramic membrane 11, compressed air is generated by the air compressor 3 to flush from the bottom of the outer side of the ceramic membrane 11, and a flocculent scale layer attached to the membrane surface is effectively removed; when the ceramic membrane wastewater treatment system adopts hydraulic back flushing, the ceramic membrane wastewater treatment system further comprises a back flushing pump 7, one end of the back flushing pump 7 is connected with the buffer pool, and the other end of the back flushing pump is positioned at the front end of the ceramic membrane 11, wherein the buffer pool 9 has the above-mentioned function, the buffer pool 9 is flushed from the inner side of the ceramic membrane 11 to the outer side by the power provided by the back flushing pump 7, and the transmembrane pressure difference between the inner side and the outer side of the ceramic membrane 11 is maintained to be 5-30 kpa; when the ceramic membrane wastewater treatment system adopts chemical cleaning, the ceramic membrane wastewater treatment system comprises a cleaning agent, and the ceramic membrane 11 is cleaned by the cleaning agent, wherein the cleaning agent adopts a citric acid solution (the concentration range is 1% -20%) or a sodium hypochlorite solution (the concentration range is 1% -10%) with a certain concentration, the ceramic membrane 11 adopts a flat ceramic membrane 11, and the flat ceramic membrane 11 is soaked in the acid solution or is chemically cleaned from the inner side of the ceramic membrane 11 to the outer side by adopting a chemical cleaning pump to provide power; the chemical cleaning is periodic cleaning, and the transmembrane pressure difference of the ceramic membrane 11 is effectively recovered to 5-15 kpa.
In this embodiment, the ceramic membrane wastewater treatment system further includes a control unit 16, a water inlet flow meter 13, a water outlet flow meter 14, a vacuum meter and an online turbidity meter 15, the water inlet flow meter 13 is disposed at the front end of the ceramic membrane 11, the water outlet flow meter 14 is disposed at the rear end of the ceramic membrane 11, the vacuum meter is disposed at the inner side of the ceramic membrane 11, the vacuum meter is communicated with the inner side of the ceramic membrane 11 and is used for measuring the pressure difference between the inner side and the outer side of the flat ceramic membrane 11, the online turbidity meter 15 is mounted at the rear end of the ceramic membrane 11 and is used for detecting the water outlet condition of the ceramic membrane 11, the online turbidity meter value is between 0.8 and 1UNT, the system is required to be chemically cleaned, the water inlet flow meter 13, the water outlet flow meter 14, the vacuum meter and the online turbidity meter 15 are all electrically connected with the control unit 16, and in addition, the first water pump 8, the second water pump 2, the third water pump 10, the fourth water pump 12 and the backwash pump 7 are electrically connected with the control unit 16, so that automation is realized.
In addition, the present embodiment is explained by two application examples:
first example: the hardness of industrial circulating water is treated by adopting a fluidized bed crystallization technology, the turbidity in the fluidized bed hardness removal effluent is 50-150 UNT, and the effluent cannot enter a circulating water system for reuse; the ceramic membrane treatment system is adopted, the transmembrane pressure difference of the ceramic membrane 11 is controlled to be 6-12 kpa, the turbidity in the water discharged from the ceramic membrane 11 is less than or equal to 1UNT, and the requirements of the subsequent industrial circulating water are met; the floccule concentration in the membrane tank is more than or equal to 10 percent (wt%) and is discharged into a factory sludge tank, and sludge dewatering treatment is carried out along with biochemical sludge; the ceramic membrane treatment system carries out conventional back flushing in water, and the flux of the ceramic membrane 11 is maintained at 2.5-3.0 m < 3 >/m < 2 >. D.
Second example: the hardness in the industrial circulating water is treated by adopting a fluidized bed crystallization technology, the turbidity in the hard-removed effluent of the fluidized bed is higher and reaches 80-120 NUT, and the hard-removed effluent cannot enter a circulating water system due to the existence of flocs; the ceramic membrane treatment system is adopted to treat the fluidized bed hard removal effluent, and the turbidity in the industrial circulating water treated by the ceramic membrane 11 is less than or equal to 0.8NUT, so that the requirements of the industrial circulating water of chlor-alkali enterprises are met; the operation transmembrane pressure difference of the ceramic membrane 11 is 10-15 kpa, and the floccule substances intercepted by the ceramic membrane 11 enter a factory sludge system for treatment; because algae are contained in the circulating water, the ceramic membrane 11 needs to be cleaned by 5% sodium hypochlorite solution, and the flux of the ceramic membrane 11 can be effectively recovered to 2.5-3.0 m < 3 >/m < 2 >. D after cleaning.
The present utility model is not limited to the above-mentioned preferred embodiments, and any person who can obtain other various products under the teaching of the present utility model can make any changes in shape or structure, and all the technical solutions that are the same or similar to the present utility model fall within the scope of the present utility model.
Claims (10)
1. A ceramic membrane wastewater treatment system applied to a fluidized bed hardness removal process, which is characterized by comprising ceramic membrane filtering equipment for filtering flocculent impurities in wastewater and a sedimentation tank (1) for separating out particle impurities from the fluidized bed, wherein the ceramic membrane filtering equipment comprises at least one ceramic membrane (11) and a membrane tank (5), and the ceramic membrane (11) is provided with membrane pores, and the pore diameter of the membrane pores is smaller than the diameter of the flocculent impurities; the front end of the ceramic membrane (11) is connected with the membrane tank (5), and the membrane tank (5) is connected with the sedimentation tank (1).
2. The ceramic membrane wastewater treatment system applied to the fluidized bed hardness removal process according to claim 1, wherein the ceramic membrane filtration device further comprises a first water pump (8), the first water pump (8) is connected to the ceramic membrane (11), and the internal and external pressure difference of the ceramic membrane (11) is 5-30 Kpa.
3. The ceramic membrane wastewater treatment system applied to the fluidized bed hardness removal process according to claim 1, wherein the ceramic membrane wastewater treatment system further comprises a second water pump (2), one end of the second water pump (2) is connected with the sedimentation tank (1), and the other end of the second water pump (2) is connected with the membrane tank (5).
4. A ceramic membrane wastewater treatment system applied to a fluidized bed hardness removal process according to claim 3, wherein the second water pump (2) adopts a tube type centrifugal pump or a slurry pump.
5. The ceramic membrane wastewater treatment system applied to the fluidized bed hardness removal process according to claim 1, further comprising a wastewater purification device, wherein the wastewater purification device comprises a buffer tank (9) and a third water pump (10), the third water pump (10) is connected with an outlet end of the buffer tank (9), and a water inlet end of the buffer tank (9) is connected with a rear end of the ceramic membrane (11).
6. The ceramic membrane wastewater treatment system applied to the fluidized bed hardness removal process according to claim 5, further comprising a fourth water pump (12), wherein one end of the fourth water pump (12) is communicated with the buffer tank (9), the other end of the fourth water pump (12) is arranged at the front end of the ceramic membrane (11), when the turbidity of the water discharged from the rear end of the ceramic membrane (11) is greater than or equal to 1nut, the fourth water pump (12) is started, and filtered water in the buffer tank (9) is conveyed to the ceramic membrane (11) again for filtration.
7. Ceramic membrane wastewater treatment system for use in a fluidized bed de-hardening process according to claim 5, characterized in that the ceramic membrane wastewater treatment system further comprises a cleaning system for cleaning the ceramic membrane (11), the cleaning system comprising one or more combinations of gas flushing, hydraulic backwash and chemical cleaning.
8. The ceramic membrane wastewater treatment system applied to the fluidized bed hardness removal process according to claim 7, wherein when the ceramic membrane wastewater treatment system is flushed by gas, the ceramic membrane wastewater treatment system further comprises an air compressor (3), and the air injection end of the air compressor (3) is positioned at the bottom of the outer side of the ceramic membrane (11);
or when the ceramic membrane (11) wastewater treatment system adopts hydraulic back flushing, the ceramic membrane wastewater treatment system also comprises a back flushing pump (7), one end of the back flushing pump (7) is connected with the buffer tank, and the other end of the back flushing pump is positioned at the front end of the ceramic membrane (11);
or when the ceramic membrane wastewater treatment system adopts chemical cleaning, the ceramic membrane wastewater treatment system comprises a cleaning agent, and the ceramic membrane (11) is cleaned by the cleaning agent.
9. Ceramic membrane wastewater treatment system applied in fluidized bed de-hardening process according to claim 8, characterized in that the ceramic membrane (11) is a flat ceramic membrane.
10. The ceramic membrane wastewater treatment system applied to fluidized bed hardness removal process according to any one of claims 1 to 9, further comprising a control unit (16), a water inlet flowmeter (13), a water outlet flowmeter (14), a vacuum meter and an online turbidity meter (15), wherein the water inlet flowmeter (13) is arranged at the front end of the ceramic membrane (11), the water outlet flowmeter (14) is arranged at the rear end of the ceramic membrane (11), the vacuum meter is arranged at the inner side of the ceramic membrane (11), the online turbidity meter (15) is arranged at the rear end of the ceramic membrane (11), and the water inlet flowmeter (13), the water outlet flowmeter (14), the vacuum meter and the online turbidity meter (15) are all electrically connected with the control unit (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321612651.7U CN220098662U (en) | 2023-06-25 | 2023-06-25 | Ceramic membrane wastewater treatment system applied to fluidized bed hardness removal process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321612651.7U CN220098662U (en) | 2023-06-25 | 2023-06-25 | Ceramic membrane wastewater treatment system applied to fluidized bed hardness removal process |
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| Publication Number | Publication Date |
|---|---|
| CN220098662U true CN220098662U (en) | 2023-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321612651.7U Active CN220098662U (en) | 2023-06-25 | 2023-06-25 | Ceramic membrane wastewater treatment system applied to fluidized bed hardness removal process |
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| Country | Link |
|---|---|
| CN (1) | CN220098662U (en) |
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2023
- 2023-06-25 CN CN202321612651.7U patent/CN220098662U/en active Active
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