CN211328943U - Ultrafiltration membrane group for ultrafiltration treatment of high-turbidity wastewater - Google Patents
Ultrafiltration membrane group for ultrafiltration treatment of high-turbidity wastewater Download PDFInfo
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- CN211328943U CN211328943U CN201922227202.0U CN201922227202U CN211328943U CN 211328943 U CN211328943 U CN 211328943U CN 201922227202 U CN201922227202 U CN 201922227202U CN 211328943 U CN211328943 U CN 211328943U
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Abstract
The utility model relates to an ultrafiltration membrane group for ultrafiltration treatment of high-turbidity wastewater, which comprises a filter cylinder, a water inlet pipe connected with the water inlet of the filter cylinder, a source water pump connected with the water inlet pipe, a water outlet pipe connected with the water outlet of the filter cylinder and a water tank communicated with the water outlet pipe, wherein a back flush pump is arranged between the water tank and the filter cylinder, a concentrated water return port of the filter cylinder is provided with a circulating pipe, one end of the circulating pipe is communicated with the concentrated water return port, the other end of the circulating pipe is communicated with the water inlet pipe; the concentrated water return port is also communicated with a first sewage discharge pipe, the first sewage discharge pipe is connected with the circulating pipe in parallel, and a first sewage discharge valve is arranged. The utility model discloses not only have the effect of shared total area when reducing waste water treatment, have the cross-flow anti-soil ability that the function through the large-traffic backward flow dense water of internal circulation pump realized the ultrafiltration membrane group moreover to reduce the effect that the ultrafiltration membrane group pollutes.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment's technique and specifically relates to an ultrafiltration membrane group for high turbidity waste water ultrafiltration treatment is related to.
Background
Hollow fiber ultrafiltration membranes are widely used in the preparation of purified water and sewage treatment, and ultrafiltration membranes are mainly used for filtering colloids, organic matters and the like in water. The hollow fiber filtering membrane has two operation modes in practical application: the first is a total filtration technology, wherein 100% of produced water is obtained after all water passes through a filtration membrane, colloid and organic matters are filtered on the surface of the membrane, and after the flux of the membrane is reduced to be below a certain value, chemical cleaning is carried out to clean the substances filtered on the surface of the membrane; the second is a tangential filtration technique, wherein most of the produced water is obtained after the water enters the membrane device, and the other small part of the water (concentrated water) does not permeate the membrane and flows parallel to the surface of the membrane, and simultaneously carries away the substances filtered on the surface of the membrane.
Such as a hollow fiber membrane module and a hollow fiber membrane module unit disclosed in chinese patent application No. CN 201320070105.5. Comprises a cylindrical container; a hollow fiber membrane bundle arranged in the cylindrical container and having a plurality of hollow fiber membranes; and cover bodies arranged at both ends of the cylindrical container, the hollow fiber membrane bundle being adhesively fixed to both ends of the cylindrical container such that one or both ends of the hollow fiber membrane bundle are in an open state, wherein one or more pairs of opposing side nozzles are formed on an outer circumferential surface of the cylindrical container; the hollow fiber membrane module unit includes the above-described plurality of hollow fiber membrane modules coupled to each other by a pair of side nozzles of one or more pairs of opposing side nozzles.
In the dense water that does not see through the membrane, the concentration of pollutant can increase substantially, and consequently the side of this patent is equipped with the side nozzle that is used for the dense water of backward flow, dense water backward flow mouth promptly, but from the dense water of dense water backward flow mouth outflow, need carry out extra storage, processing for the total area greatly increased that filtering mechanism occupy.
Therefore, a new solution is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects existing in the prior art, the utility model aims at providing an ultrafiltration membrane group for ultrafiltration treatment of high-turbidity wastewater.
The above object of the present invention can be achieved by the following technical solutions:
an ultrafiltration membrane group for ultrafiltration treatment of high-turbidity wastewater comprises a filter cylinder, a water inlet pipe connected to a water inlet of the filter cylinder, a source water pump connected to the water inlet pipe, a water outlet pipe connected to a water outlet of the filter cylinder and a water tank communicated with the water outlet pipe, wherein a back flush pump is arranged between the water tank and the filter cylinder, a circulating pipe is arranged at a concentrated water return port of the filter cylinder, one end of the circulating pipe is communicated with the concentrated water return port, the other end of the circulating pipe is communicated with the water inlet pipe, and; the concentrated water return port is also communicated with a first sewage discharge pipe, the first sewage discharge pipe is connected with the circulating pipe in parallel, and a first sewage discharge valve is arranged.
By adopting the technical scheme, when the wastewater is filtered, the concentrated water is circulated and refluxed to the water inlet pipe of the filter cylinder through the circulating pump, so that the concentrated water is repeatedly filtered, source water is not discharged in the running process, the recycling rate of the wastewater is greatly improved, and the occupied area of the concentrated water after the concentrated water is refluxed is saved;
the filter membrane can be blocked more quickly in the process of repeatedly filtering the concentrated water, so a back washing pump and a back washing pipe are arranged to back wash the filter membrane, and the service life of the filter membrane is prolonged.
The present invention may be further configured in a preferred embodiment as: the water inlet pipe is provided with a first pressure gauge, a first pressure switch and a one-way valve which is communicated in one way towards the water inlet of the filter cylinder.
Through adopting above-mentioned technical scheme, control the pressure of intaking through first manometer, prevent that the pressure of intaking from too big damage and strain a section of thick bamboo, simultaneously through the design of check valve for lead to in the circulating pipe and strain a water can not form the convection current with intaking, cause the interference.
The present invention may be further configured in a preferred embodiment as: the water inlet pipe is also connected with an air inlet pipe, one end of the air inlet pipe is communicated with the water inlet pipe, and the other end of the air inlet pipe is communicated with the source gas tank; the air inlet pipe is provided with an air pressure reducing valve, a one-way valve which is in one-way conduction towards the water inlet of the filter cylinder, a second pressure gauge, a second pressure switch and an air inlet valve.
Through adopting above-mentioned technical scheme, admit air through the intake pipe, carry out gas and scrub the backwash of joint water, reach better cleaning performance to control the air current of crossing the atmospheric pressure through the gas relief pressure valve, prevent to strain a section of thick bamboo and cause the damage.
The present invention may be further configured in a preferred embodiment as: the water inlet of the filter cylinder is also communicated with a second sewage discharge pipe, and a second sewage discharge valve is arranged on the second sewage discharge pipe.
When the filter cartridge is manufactured, in order to maximize the design flux of a single filter cartridge and reduce the investment cost, the hollow fiber membrane filaments in the filter cartridge are dense in general; in order to prolong the permeation time of source water in the filter cylinder, the concentrate backflow port of the filter cylinder is generally arranged at one end close to the water outlet of the filter cylinder;
therefore, one end of the filter cylinder, which is far away from the concentrated water return pipe, can possibly have pollutants clamped between the membrane wires and the membrane wires, one part of the pollutants is large-particle pollutants which are difficult to flush the concentrated water return port, the other part of the pollutants are pollutants which are generated by back flushing of the hollow fiber membrane wires, and through the design of the second blow-off pipe, the pollutants at the end, which is far away from the concentrated water return port, of the filter cylinder can be discharged, so that a better cleaning effect is achieved.
The present invention may be further configured in a preferred embodiment as: the circulating pipe is provided with a one-way valve, a concentrated water flowmeter and a concentrated water reflux valve which are communicated towards the water inlet of the filter cylinder in one way; and a purified water flow meter is arranged between the water outlet pipe and the water tank.
By adopting the technical scheme, the design of the one-way valve prevents the water flow of the water inlet pipe from entering the circulating pipe to cause interference on the water flow of the circulating pipe;
meanwhile, through the design of the concentrated water flowmeter and the pure water flowmeter, the flow and the proportion of the pure water and the concentrated water can be observed, so that the proportion of the reflowing concentrated water can be adjusted through the concentrated water reflux valve, the pressure of water pressure on the filter cartridge is reduced, and the service life of the filter cartridge is prolonged.
The present invention may be further configured in a preferred embodiment as: a backwashing pipe is communicated between the water outlet of the filter cylinder and the water tank, a backwashing valve, a one-way valve communicated towards the water outlet pipe of the filter cylinder in one way, a third pressure gauge and a third pressure switch are arranged on the backwashing pipe, and a backwashing pump is connected to the backwashing pipe.
By adopting the technical scheme, the pressure of the backwashing is detected and automatically shut down when the pressure is overlarge, so that the pressure of the filter cylinder is prevented from being damaged by the water pressure of the backwashing.
The present invention may be further configured in a preferred embodiment as: the water tank is provided with a water level gauge, and the water level gauge comprises a first water level detector for detecting a high water level and a second water level detector for detecting a low water level.
By adopting the technical scheme, when the water level is too low, backwashing cannot be carried out, and the backwashing pump is automatically shut down; when the water level is too high, new clean water cannot be stored, and the source water pump is automatically shut down.
The present invention may be further configured in a preferred embodiment as: the filter cylinders are provided with a plurality of filter cylinders, and the filter cylinders use the same water pump, the same backwashing pump and the same circulating pump.
Through adopting above-mentioned technical scheme, in order to filter a large amount of waste water, strain a section of thick bamboo and need set up many, but in order to take over the convenience, only need use a powerful source water pump, a backwash pump, a circulating pump can satisfy the demand.
To sum up, the utility model discloses a following at least one useful technological effect:
1. concentrated water does not need to flow back to the water tank, so that the occupied area can be saved;
2. the wastewater is not discharged during the operation, and the recovery rate of the wastewater is greatly improved;
3. the concentrated water is reflowed to the water inlet pipe by the internal circulating pump, so that the anti-pollution cross flow degree of the ultrafiltration membrane filaments is greatly increased.
Drawings
FIG. 1 is a schematic structural view of the present embodiment;
FIG. 2 is a schematic view showing a structure in which a part of the circulation pipe and the drain pipe are hidden.
In the figure, 1, a filter cartridge; 11. a water outlet pipe; 12. a third pneumatic valve; 13. a clean water flow meter; 14. a water inlet; 15. a water outlet; 16. a concentrated water return port; 2. a source water pump; 21. a water inlet pipe; 22. a first pneumatic valve; 23. a first pressure gauge; 24. a first pressure switch; 3. a backwash pump; 31. a backwash pipe; 32. a back flush valve; 33. a third pressure gauge; 34. a third pressure switch; 4. a circulation pump; 41. a circulation pipe; 42. a second pneumatic valve; 43. a manual butterfly valve; 44. a concentrate flowmeter; 5. a first drain pipe; 51. a first waste valve; 6. a second sewage draining pipe; 61. a second blowoff valve; 7. an air inlet pipe; 71. an intake valve; 72. a second pressure gauge; 73. a second pressure switch.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the utility model discloses an ultrafiltration membrane group for ultrafiltration treatment of high turbidity wastewater, including a filter cartridge 1, an inlet pipe 21 connected to a water inlet 14 of the filter cartridge 1, a source water pump 2 connected to the inlet pipe 21, an outlet pipe 11 connected to a water outlet 15 of the filter cartridge 1 and a water tank communicated with the outlet pipe, wherein tens of thousands of hollow fiber membrane filaments are installed in the filter cartridge 1, source water enters from the inlet pipe 21 of the filter cartridge, purified water in the source water seeps into the hollow fiber membrane filaments under water pressure, and then flows into the outlet pipe 11 from the hollow fiber membrane filaments, and finally flows out to the water tank for storage; the concentrate remaining in the source water flows away from the concentrate return port 16 of the filter cartridge 1. When a module is formed by using a plurality of filter cartridges 1, the water inlet 14 of each filter cartridge 1 is collected into a total water inlet pipe 21, the water outlet 15 of each filter cartridge 1 is collected into a total water outlet pipe 11, and the concentrate return port 16 of each filter cartridge 1 is collected into a total concentrate return pipe, and this flow belongs to the application of the hollow ultrafiltration membrane in the prior art in filtration, and details are not described here.
The concentrated water return opening 16 is communicated with a circulating pipe 41, one end of the circulating pipe 41 is communicated with the concentrated water return opening 16, the other end of the circulating pipe 41 is communicated with the water inlet pipe 21, and the circulating pipe 41 is provided with a circulating pump 4, so that the returned concentrated water is led to the water inlet pipe 21 again. In order to prevent the backflow of the concentrate from interfering with the normal operation of the source water pump 2, a check valve is provided on the circulation pipe 41 to be unidirectionally conducted toward the water inlet 14 of the filter cartridge 1.
In order to control the water flow conveniently, a first pneumatic valve 22 is arranged at the water inlet pipe 21, a second pneumatic valve 42 is arranged at the circulating pipe 41, and a third pneumatic valve 12 is arranged at the water outlet pipe 11, when the wastewater is filtered, the first pneumatic valve 22, the second pneumatic valve 42 and the third pneumatic valve 12 are firstly opened, the source water pump 2 is started after 2 seconds, and the circulating pump 4 is started after 3 seconds. The water outlet pipe 11 and the circulating pipe 41 are respectively provided with a purified water flowmeter 13 and a concentrated water flowmeter 44, the circulating pipe 41 is provided with a concentrated water return valve, and the concentrated water return valve uses a manual butterfly valve 43. When the circulating pump 4 works, the manual butterfly valve 43 is adjusted according to the concentrated water flow meter 44, so that the ratio of concentrated water to purified water is 1: 1. when the manual butterfly valve 43 is adjusted, under the condition that the power of the source water pump 2 is large enough and the purified water yield is sufficient, the valve of the manual butterfly valve 43 is opened a little more as possible to improve the backflow ratio of the concentrated water, increase the anti-fouling cross flow degree of the surface of the ultrafiltration membrane wire and prolong the service life of the hollow ultrafiltration membrane.
The water inlet pipe 21 is also provided with a first pressure switch 24 and a first pressure gauge 23 for detecting water pressure, and when the purified water yield is enough, the lower the pressure of the first pressure gauge 23 is, the longer the service life of the hollow ultrafiltration membrane is. If the pressure of the first pressure gauge 23 exceeds 0.25MPa, which indicates that the source water pressure is too high, the source water pump 2 is immediately turned off and an alarm is given, and if the filtering effect is reduced after one year of use, the pressure threshold value can be adjusted to 0.30 MPa. The water inlet pressure of the source water cannot exceed 0.35Mpa, because the end sealing process of the filter cartridge 1 (the process of sealing the gap between adjacent hollow fiber membrane filaments when the filter cartridge 1 is manufactured) is to seal the two ends of the hollow fiber membrane filaments by polyurethane or epoxy glue. Experiments show that the pressure resistance of the glue sealing layer is generally 0.4mpa, but the pressure exceeding the pressure can cause the glue layer to be separated from the hollow fiber membrane yarns, namely degumming.
As shown in fig. 1 and 2, after a period of circulating filtration, the filter cartridge 1 needs to be backwashed to ensure the subsequent filtration effect. Therefore, a backwash pipe 31 is also connected between the water outlet 15 of the filter cartridge 1 and the water tank, the backwash pump 3 is connected to the backwash pipe 31, and the backwash pipe 31 is connected in parallel to the drain pipe. The back flushing pipe 31 is provided with a back flushing valve 32 for opening and closing the back flushing pipe 31, a one-way valve communicated towards the water outlet pipe 11 of the filter cartridge 1 in one way, a third pressure gauge 33 for detecting the water pressure in the back flushing pipe 31 and a third pressure switch 34. The concentrated water return pipe is communicated with a first sewage discharge pipe 5, the first sewage discharge pipe 5 is connected with the circulating pipe 41 in parallel, and a first sewage discharge valve 51 is arranged.
When the backwashing is needed, the source water pump 2 and the circulating pump 4 are firstly closed, the first pneumatic valve 22, the second pneumatic valve 42 and the third pneumatic valve 12 are closed after 2 seconds, the first blow-off valve 51 and the backwashing valve 32 are simultaneously opened, and the backwashing water pump 3 is started after 2 seconds. If the pressure of the third pressure gauge 33 exceeds 0.28Mpa, the pressure of the backwash water is too high, and the membrane filaments and the filter cartridge 1 may be degummed, and the backwash pump 3 is controlled to stop and give an alarm. The third pressure switch 34 is set at less than 0.28Mpa and is adjustable to less than 0.32Mpa after three months of use. In the backwashing, the most important is the flow rate of backwashing, that is, the amount of backwashing water per unit time, and therefore, the amount of backwashing water per unit time needs to be at least twice the amount of purified water, and the larger the amount of backwashing water in a predetermined pressure range, the better.
The requirement that the quantity of backwashing water is more than twice of the yield of purified water can be met because the hollow fiber membrane yarns are made of elastic polypropylene hollow fiber membrane yarns which are manufactured by adopting a drawing process and have a high-strength membrane hole expanding function and quite good inner surface support property. Therefore, when the hollow fiber membrane yarn is pressurized from outside to inside during operation, the filtration micropores on the membrane yarn wall can not be changed, and when the hollow fiber membrane yarn is backflushed, under the pressure that the backflush pressure is not more than 0.40Mpa, the diameter of the filtration micropores on the membrane yarn wall can be greatly enlarged under the action of high elasticity of the membrane yarn, and the large-flow injection from inside to outside is realized, so that the impurities attached to the outer surface of the membrane yarn can be thoroughly and smoothly backflushed; once the back flushing is stopped and the membrane is switched to the running state, the filtration micropores on the membrane wire wall are completely restored to the original pore diameter during running and filtration, so the back flushing cleaning effect is greatly improved.
After backwashing for 10 seconds, the backwashing discharge of the first sewage discharge pipe 5 gradually changes from turbid to clear, the backwashing effect becomes poor, the hollow fiber membrane filaments are not thoroughly cleaned, in order to achieve the sufficient backwashing effect, an air inlet pipe 7 is further connected to the water inlet pipe 21, one end of the air inlet pipe 7 is communicated with the water inlet pipe 21, and the other end of the air inlet pipe is communicated with an active air tank. The air inlet pipe 7 is provided with an air pressure reducing valve, a second pressure gauge 72, an air inlet valve 71, a second pressure switch 73 and a one-way valve which is communicated in one way towards the water inlet 14 of the filter cartridge 1 in sequence towards the water inlet 14 of the filter cartridge 1. The water inlet pipe 21, the air inlet pipe 7 and the circulating pipe 41 are arranged in parallel, and under the arrangement of the one-way valve, gas and liquid can only enter the filter cartridge 1 under the pressure of inlet gas without mutual interference.
After backwashing for 10 seconds, the air inlet valve 71 is opened, the source air tank is used for introducing air into the filter cylinder 1, high-speed air rushes into the filter cylinder 1 from the water inlet 14 of the filter cylinder 1, so that the hollow fiber membrane filaments are shaken fully, the hollow fiber membrane filaments are shaken and the surface of membrane holes is scrubbed, and in actual operation, the situation that after the backwashing of 10 seconds of water, the sewage in the first sewage discharge pipe 5 is changed from turbid to clear, at the moment, the air is changed from clear to turbid is realized, and after 20 seconds, the air pressure in the source air tank is gradually reduced, and the sewage in the first sewage discharge pipe 5 is changed from turbid to clear. The above process is a process of air scrubbing combined with water backwashing, and the cleaning effect is confirmed through a large number of experiments.
It should be noted that the pressure of the gas pressure reducing valve is controlled at 0.3Mpa, that is, no matter the gas amount in the source gas tank is insufficient, the pressure at the moment of opening the gas inlet valve 71 must reach 0.3Mpa, and then the gas pressure is large enough to achieve the gas scrubbing effect, but the gas pressure cannot be too large, which is the same as the reason that the water inlet pressure is controlled at 0.3Mpa, so as to prevent the hollow fiber membrane filaments and the filter cartridge 1 from degumming.
Once the air inlet valve 71 is opened, the air pressure provided by the source air tank can be quickly reduced, at the moment, the air pressure does not need to be adjusted, and the effect of fully shaking the hollow fiber membrane yarns can be achieved as long as the instantaneous air inlet pressure can reach 0.3 Mpa. The air intake effect in 20 seconds after the pressure reduction is to carry out air scrubbing on the surface of the hollow fiber membrane yarn, namely, pollutants on the surface of the membrane yarn are scrubbed by utilizing bubbles, so that the pollutants attached to the surface of the membrane are loosened. Not only the air scrubbing effect is deteriorated after the air intake valve 71 is opened for 20 seconds, but also the air pressure in the source tank is exhausted without closing the air intake valve 71 at this time, and even if a check valve is provided, water may flow back into the source tank. Therefore, at this time, the intake valve 71 needs to be closed.
When the filter cartridge 1 is manufactured, in order to maximize the design flux of a single filter cartridge 1 and reduce the investment cost, the hollow fiber membrane filaments in the filter cartridge 1 are dense in general; and in order to improve the penetration time of the wastewater in the filter cartridge 1 to enhance the cross flow degree of the membrane filament surface for the purpose of anti-fouling, the concentrate return opening 16 of the filter cartridge 1 is generally disposed at one end close to the water outlet 15 of the filter cartridge 1. Therefore, at the end of the filter cartridge 1 far from the concentrate return pipe, there is a possibility that contaminants are caught between the membrane filaments, and some of the contaminants are large-particle contaminants that are difficult to wash out to the concentrate return port 16, and other contaminants are backflushed from the hollow fiber membrane filaments.
Therefore, the water inlet 14 of the filter cartridge 1 is also communicated with the second sewage draining pipe 6, the second sewage draining valve 61 is arranged on the second sewage draining pipe 6, after the air inlet valve 71 is closed, the second sewage draining valve 61 is opened to maintain the opening state of the backwashing pump 3, and backwashing is performed again for 30s, so that pollutants at the end of the filter cartridge 1 far away from the concentrated water return port 16 are discharged out through the second sewage draining pipe 6 as thoroughly as possible.
Example two: an ultrafiltration membrane group for ultrafiltration treatment of high turbidity wastewater is shown in figure 1, and takes 54 KJ-ESUF9050 membranes (filter cartridges) for each 100T/H source water treatment as an example. The water inlet pipe 21 is made of PVC pipes with DN200 specification, and 204T source water is treated every hour; the circulating pipe 41 is made of a PVC pipe material with DN150 specification, and 100T of concentrated water circulates every hour; the water outlet pipe 11 is made of a PVC pipe material with DN125 or DN150 specification, and 102T of purified water is collected every hour; the back-flushing pipe 31 is a PVC pipe with DN200 specification, and 204T pure water can be back-flushed every hour during back flushing. The air inlet pipe 7 is made of a PVC pipe material with the specification of DN 50; DN200 PVC pipe was used for the first drain pipe 5.
When the device works, the filter cylinder 1 is backwashed for about 1 minute every 25 minutes (the running time is counted when the first pneumatic valve 22 is opened), so that the treatment efficiency of the wastewater is kept on the premise of circulating treatment of the concentrated water, and the discharge of the sewage flowing out of the final sewage discharge pipe is greatly reduced compared with the backflow of the concentrated water.
When ultrafiltration water treatment is carried out, different treatments are carried out according to the type of source water, and when the source water is underground water or tap water, the operation cycle is 40 minutes; the source water is surface water, and the operation period is 30 minutes; when the source water is the pretreated wastewater, the operation period is 25 minutes. The pretreatment refers to coagulation sedimentation of wastewater, belongs to a necessary flow in the wastewater treatment process, and is characterized in that a coagulant (PAM) is added to accelerate sedimentation in the traditional coagulation sedimentation, and after the accelerated sedimentation, the supernatant is subjected to further coarse filtration and then can enter an ultrafiltration membrane.
Example three: an ultrafiltration membrane group for ultrafiltration treatment of high turbidity wastewater is disclosed, as shown in fig. 1, a water level meter is further arranged in a water tank, the water level meter comprises a first water level detector for detecting a high water level and a second water level detector for detecting a low water level, when the water level is too low, backwashing can not be carried out, and a backwashing pump is automatically shut down; when the water level is too high, new clean water cannot be stored, and the source water pump 2 is automatically turned off.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides an ultrafiltration membrane group for high turbidity waste water ultrafiltration treatment, includes and strains a section of thick bamboo (1), connect inlet tube (21) of water inlet (14) of straining a section of thick bamboo (1), connect source water pump (2) of inlet tube (21) department, connect outlet pipe (11) of delivery port (15) of straining a section of thick bamboo (1) and communicate in the water tank of outlet pipe (11), its characterized in that: a back flush pump (3) is arranged between the water tank and the filter cylinder (1), a circulating pipe (41) is arranged at a concentrated water return port (16) of the filter cylinder (1), one end of the circulating pipe (41) is communicated with the concentrated water return port (16), the other end of the circulating pipe (41) is communicated with a water inlet pipe (21), and a circulating pump (4) is arranged on the circulating pipe (41); the concentrated water return opening (16) is also communicated with a first sewage discharge pipe (5), the first sewage discharge pipe (5) is connected with the circulating pipe (41) in parallel, and a first sewage discharge valve (51) is arranged.
2. The ultrafiltration membrane module of claim 1, wherein the ultrafiltration membrane module comprises: the water inlet pipe (21) is provided with a first pressure gauge (23), a first pressure switch (24) and a one-way valve which is in one-way conduction towards the water inlet (14) of the filter cartridge (1).
3. The ultrafiltration membrane module of claim 1, wherein the ultrafiltration membrane module comprises: the water inlet pipe (21) is also connected with an air inlet pipe (7), one end of the air inlet pipe (7) is communicated with the water inlet pipe (21), and the other end of the air inlet pipe is communicated with a source gas tank; the air inlet pipe (7) is provided with an air pressure reducing valve, a one-way valve which is communicated in one way towards the water inlet (14) of the filter cartridge (1), a second pressure gauge (72), a second pressure switch (73) and an air inlet valve (71).
4. The ultrafiltration membrane module of claim 1, wherein the ultrafiltration membrane module comprises: the water inlet (14) of the filter cylinder (1) is also communicated with a second sewage discharge pipe (6), and a second sewage discharge valve (61) is arranged on the second sewage discharge pipe (6).
5. The ultrafiltration membrane module of claim 1, wherein the ultrafiltration membrane module comprises: the circulating pipe (41) is provided with a one-way valve, a concentrated water flowmeter (44) and a concentrated water return valve which are communicated towards the water inlet (14) of the filter cartridge (1) in one way; and a purified water flow meter (13) is arranged between the water outlet pipe (11) and the water tank.
6. The ultrafiltration membrane module of claim 1, wherein the ultrafiltration membrane module comprises: a back flushing pipe (31) is communicated between the water outlet (15) of the filter cylinder (1) and the water tank, a back flushing valve (32), a one-way valve communicated towards the water outlet pipe (11) of the filter cylinder (1) in one way, a third pressure gauge (33) and a third pressure switch (34) are arranged on the back flushing pipe (31), and a back flushing pump (3) is connected to the back flushing pipe (31).
7. The ultrafiltration membrane module of claim 1, wherein the ultrafiltration membrane module comprises: the water tank is provided with a water level gauge, and the water level gauge comprises a first water level detector for detecting a high water level and a second water level detector for detecting a low water level.
8. The ultrafiltration membrane module of claim 1, wherein the ultrafiltration membrane module comprises: the filter cylinders (1) are provided with a plurality of filter cylinders, and the filter cylinders (1) use the same source water pump (2), the same backwashing pump (3) and the same circulating pump (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922227202.0U CN211328943U (en) | 2019-12-11 | 2019-12-11 | Ultrafiltration membrane group for ultrafiltration treatment of high-turbidity wastewater |
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| CN201922227202.0U CN211328943U (en) | 2019-12-11 | 2019-12-11 | Ultrafiltration membrane group for ultrafiltration treatment of high-turbidity wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113274884A (en) * | 2021-05-25 | 2021-08-20 | 重庆中轻装备有限公司 | Activated carbon ceramic membrane cross-flow filtration system and filtration backwashing process |
| WO2022135673A1 (en) * | 2020-12-21 | 2022-06-30 | Wilo Se | Monitoring the integrity of an ultrafiltration membrane during a backflushing operation |
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2019
- 2019-12-11 CN CN201922227202.0U patent/CN211328943U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022135673A1 (en) * | 2020-12-21 | 2022-06-30 | Wilo Se | Monitoring the integrity of an ultrafiltration membrane during a backflushing operation |
| CN113274884A (en) * | 2021-05-25 | 2021-08-20 | 重庆中轻装备有限公司 | Activated carbon ceramic membrane cross-flow filtration system and filtration backwashing process |
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