CN210620329U - Tubular ultrafiltration membrane system - Google Patents
Tubular ultrafiltration membrane system Download PDFInfo
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- CN210620329U CN210620329U CN201920929741.6U CN201920929741U CN210620329U CN 210620329 U CN210620329 U CN 210620329U CN 201920929741 U CN201920929741 U CN 201920929741U CN 210620329 U CN210620329 U CN 210620329U
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- 239000012528 membrane Substances 0.000 title claims abstract description 126
- 238000000108 ultra-filtration Methods 0.000 title claims abstract description 125
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 297
- 238000004140 cleaning Methods 0.000 claims abstract description 91
- 239000010802 sludge Substances 0.000 claims abstract description 72
- 239000003245 coal Substances 0.000 claims abstract description 43
- 239000003657 drainage water Substances 0.000 claims abstract description 41
- 238000004062 sedimentation Methods 0.000 claims abstract description 33
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- 238000005406 washing Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000004064 recycling Methods 0.000 abstract description 12
- 238000005065 mining Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 description 31
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- 238000010992 reflux Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
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- 239000003513 alkali Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000012466 permeate Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 208000005156 Dehydration Diseases 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
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- 238000006297 dehydration reaction Methods 0.000 description 2
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- 238000012423 maintenance Methods 0.000 description 2
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- 239000013049 sediment Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
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- 230000003247 decreasing effect Effects 0.000 description 1
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Abstract
The utility model discloses a tubular ultrafiltration membrane system, which comprises a coal mine drainage water sedimentation tank, a raw water tank, a tubular ultrafiltration membrane and a clean water tank which are connected in sequence; the coal mine drainage water sedimentation tank is connected with a raw water tank through a lift pump, the raw water tank is connected with a tubular ultrafiltration membrane through a circulating pump, the clear water outlet end of the tubular ultrafiltration membrane is connected with a clear water tank, the sludge outlet end of the tubular ultrafiltration membrane is connected with the raw water tank, the tubular ultrafiltration membrane is also connected with a cleaning component, the cleaning component comprises a cleaning water tank and a cleaning water pipe, and the clear water outlet end of the tubular ultrafiltration membrane is also connected with the cleaning water pipe; the cleaning water pipe is connected with a water source, the sludge outlet end of the tubular ultrafiltration membrane is connected with the water inlet of the cleaning water tank, the water outlet of the cleaning water tank is connected with the circulating pump, and the clean water tank is connected with the recycling tank through the recycling water pump. The utility model discloses promote colliery drainage water resource utilization, the water economy resource alleviates the mining area and supplies water not enough, improves mining area ecological environment, furthest satisfies production and life needs.
Description
Technical Field
The invention relates to the technical field of coal water treatment, in particular to a tubular ultrafiltration membrane system.
Background
The coal mine drainage water has the characteristics of large water quality fluctuation, high suspended matter content, high salt content, large water amount and the like, and is extremely harmful to the recycling of the subsequent coal mine drainage water. The traditional flocculation reaction precipitation process has poor operation stability and low automation degree, and needs to add medicaments during operation, thereby increasing the operation cost.
Disclosure of Invention
The novel method for treating the coal mine drainage water is high in automation degree and stable in operation. The tubular ultrafiltration membrane has the characteristics of high-efficiency separation and high-suspended matter resistance, replaces the traditional flocculation reaction precipitation process, can keep the stability and reliability of the system under the condition of large water quality fluctuation, simultaneously reduces the operating cost of the system increased by adding medicaments, and lightens the labor intensity of operators.
The stable operation of the tubular ultrafiltration system is the key for recycling the coal mine drainage water, promotes the resource utilization of the coal mine drainage water, saves water resources, relieves the insufficient water supply of a mining area, improves the ecological environment of the mining area, and meets the production and living needs to the maximum extent.
In order to achieve the above purpose, the invention provides the following technical scheme:
a tubular ultrafiltration membrane system comprises a coal mine drainage water sedimentation tank, a raw water tank, a tubular ultrafiltration membrane and a clean water tank which are connected in sequence; the coal mine drainage water sedimentation tank is connected with a raw water tank through a lift pump, the raw water tank is connected with a tubular ultrafiltration membrane through a circulating pump, the clear water outlet end of the tubular ultrafiltration membrane is connected with a clear water tank, the sludge outlet end of the tubular ultrafiltration membrane is connected with the raw water tank, the tubular ultrafiltration membrane is also connected with a cleaning component, the cleaning component comprises a cleaning water tank and a cleaning water pipe, and the clear water outlet end of the tubular ultrafiltration membrane is also connected with the cleaning water pipe; the water source is connected to the washing water pipe, the water inlet of washing water tank is connected to the play mud end of tubular milipore filter, the delivery port of washing water tank connects the circulating pump, the clean water pond passes through the retrieval and utilization water pump and connects the retrieval and utilization pond.
Coal mine drainage water enters a sedimentation tank firstly, primary sedimentation is carried out, then the coal mine drainage water enters an original water tank through a lifting pump, the coal mine drainage water is stirred and sedimentated in the original water tank again, the coal mine drainage water enters a tubular ultrafiltration membrane through a circulating pump, after filtration treatment is carried out in the tubular ultrafiltration membrane, clear water enters the clear water tank from a clear water outlet end, intercepted sludge water (sludge concentrated water) enters the original water tank from a sludge outlet end, the coal mine drainage water can enter the tubular ultrafiltration membrane again after treatment in the original water tank, circulation treatment of the coal mine drainage water is realized, the treatment effect is very obvious, the treated drainage water is clear and transparent, and can be directly recycled. Meanwhile, the sediment in the raw water tank is directly discharged from a sludge discharge port of the raw water tank. The tubular ultrafiltration membrane is cleaned, a clear water outlet end of the tubular ultrafiltration membrane is connected with a cleaning water pipe, the tubular ultrafiltration membrane is cleaned by clear water, cleaned sewage enters a cleaning water tank from a sludge outlet end, the cleaning water tank is connected with the tubular ultrafiltration membrane through a circulating pump 6, and the tubular ultrafiltration membrane is used for performing ultrafiltration on the cleaned sewage to realize the filtration and utilization of the cleaning water.
Further, the tubular ultrafiltration membrane comprises a tube body, one end of the tube body is provided with a water inlet end, an ultrafiltration assembly is arranged in the tube body, and the other end of the tube body is provided with a clear water outlet end and a sludge outlet end; the clear water outlet end is positioned below the ultrafiltration component. The working principle of the tubular ultrafiltration membrane is as follows: waste water gets into from the end of intaking, then through ultrafiltration module, ultrafiltration module is hollow fiber ultrafiltration membrane subassembly, and large granule impurity in the waste water can not pass through ultrafiltration module, consequently discharges from the play mud end of the other end, and the hydrone in the waste water can see through ultrafiltration module, consequently discharges from ultrafiltration module's below, realizes the separation purification to sewage.
Furthermore, the cleaning water pipe is also connected with a water inlet of the cleaning water tank. The cleaning water pipe also cleans the cleaning water tank.
Furthermore, a filter is arranged between the lift pump and the raw water tank. The filter plays a role of preliminary filtration.
Further, former water tank includes box, support, the box includes upper cover body, well conical body, the barrel down that from top to bottom sets gradually, be equipped with former water tank water inlet, mud import on the well conical body, the middle part of barrel is equipped with former water tank delivery port down, the bottom of barrel is equipped with the drain down. Water in the sedimentation tank enters a water inlet of a raw water tank through a lift pump, then drained water is subjected to further sedimentation treatment in the raw water tank, the treated drained water enters a tubular ultrafiltration membrane from a water outlet of the raw water tank through a circulating pump for treatment, and the precipitated sludge is discharged from a sewage discharge outlet; and the sludge treated in the tubular ultrafiltration membrane enters the raw water tank again from the sludge inlet.
Furthermore, the bottom of the sedimentation tank and the bottom of the raw water tank are connected with a sludge tank through a sludge discharge pump. Because the sedimentation tank and the raw water tank can both generate sludge through sedimentation, the sludge is effectively discharged through the sludge discharge pump.
Furthermore, a circulating feed valve V1 is arranged between the raw water tank 4 and the circulating pump 6,
a circulating reflux valve V2 is arranged between the sludge outlet end of the tubular ultrafiltration membrane and the raw water tank;
a water production external discharge valve V3 is arranged between the clear water outlet end of the tubular ultrafiltration membrane 7 and the clear water tank 8;
a cleaning liquid feeding valve V4 is arranged between the cleaning water tank and the circulating pump;
a cleaning liquid return valve V5 is arranged between the sludge outlet end of the tubular ultrafiltration membrane and the cleaning water tank;
a return valve V6 on the water production side of the cleaning liquid is arranged between the cleaning water pipe and the cleaning water tank;
a sludge discharge valve V7 is arranged between the raw water tank and the sludge tank.
The invention also discloses a method for treating coal mine drainage water by using the tubular ultrafiltration membrane system, which comprises the following process steps:
firstly, conveying coal mine drainage water to a coal mine drainage water sedimentation tank for sedimentation treatment;
secondly, injecting the coal mine drainage water subjected to precipitation treatment into a raw water tank;
thirdly, after the raw water tank is filled with water, performing precipitation treatment, allowing drained water in the raw water tank to enter the tubular ultrafiltration membrane through a circulating pump, performing solid-liquid separation in the tubular ultrafiltration membrane, returning a concentrated solution to the raw water tank, and allowing clear water to enter a clear water tank;
fourthly, cleaning the tubular ultrafiltration membrane by external clear water, feeding the cleaned sewage into a cleaning water tank, and returning the sewage in the cleaning water tank to the tubular ultrafiltration membrane for solid-liquid separation treatment;
and fifthly, allowing the clean water in the clean water tank to enter a recycling pool for recycling.
The tubular ultrafiltration membrane system is characterized in that waste water containing suspended solids is conveyed into an external tubular membrane component through a pump for filtration, permeate liquid is continuously discharged, sludge intercepted by micropores of an ultrafiltration membrane returns to a concentration tank, and the sludge is discharged to a sludge treatment system for dehydration treatment after the concentration of the sludge is concentrated to a certain concentration. The tubular ultrafiltration membrane filtering technology is a high-precision physical filtering technology, and the working principle of the tubular ultrafiltration membrane filtering technology is that after water (coal mine hydrophobic water) containing substances to be filtered permeates through a membrane through the high-efficiency interception function of micropores on the surface of a filtering membrane, fine particles and macromolecular organic matters are intercepted, and clear water enters a water producing side. The high-flow-rate water (the cross flow rate is 3-5 m/s) is in a turbulent flow form, dust particles intercepted by the membrane cannot stay on the surface of the membrane, but play a certain scouring role on the surface of the membrane, and pollutants are prevented from staying on the surface of the membrane, so that the tubular ultrafiltration membrane has good pollution resistance in dust solid-liquid separation treatment, and is simple and convenient to operate and low in maintenance workload. Compared with the traditional flocculation reaction precipitation solid-liquid separation process, the tubular ultrafiltration technology has the biggest advantages of no need of adding chemicals, small operation and maintenance workload and stable effluent quality. (2) The tubular ultrafiltration membrane has the characteristics of high-efficiency separation and high-suspended matter resistance, replaces a flocculation reaction precipitation process with poor operation stability, can keep the operation stability and reliability of the system under the condition of large water quality fluctuation, and simultaneously reduces the operation cost of the system increased by adding medicaments and the labor intensity of operators.
The invention has the following advantages:
1. the tubular ultrafiltration system is a novel method for treating coal mine drainage water with high automation degree and stable operation. The tubular ultrafiltration membrane has the characteristics of high-efficiency separation and high-suspended matter resistance, replaces the traditional flocculation reaction precipitation process, can keep the stability and reliability of the system under the condition of large water quality fluctuation, simultaneously reduces the operating cost of the system increased by adding medicaments, and lightens the labor intensity of operators.
2. The invention can promote the resource utilization of coal mine drainage water, save water resources, relieve the insufficient water supply in mining areas, improve the ecological environment of the mining areas and meet the production and living needs to the maximum extent.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a raw water tank device structure;
FIG. 3 is a schematic view of the structure of a tubular ultrafiltration membrane device;
FIG. 4 is a flow chart of a process for treating coal mine drainage water by using a tubular ultrafiltration membrane;
FIG. 5, continuous run flow chart;
FIG. 6, water production flux diagram for continuous operation.
Wherein: 1. draining water in a coal mine to a sedimentation tank; 2. a coal mine dewatering lift pump; 3. a filter; 4. a raw water tank; 41. a box body; 411. an upper cover body; 412. a middle conical body; 413. a lower cylinder body; 42. a support; 43. a raw water tank water inlet; 44. a sludge inlet; 45. a stirring port; 46. a water outlet of the raw water tank; 47. a sewage draining outlet; 5. cleaning the water tank; 6. a circulation pump; 7. a tubular ultrafiltration membrane; 71. a pipe body; 72. a water inlet end 73, an ultrafiltration component; 74. a clear water end; 75. a sludge end; 8. a clean water tank; 9. a recycling water pump; 10. a recycling pool; 11. cleaning the water pipe; 12. a sludge tank.
Wherein: v1 recycle feed valve; v2 recirculating return valve; a V3 produced water discharge valve; v4 rinse liquid feed valve; v5 rinse liquid return valve; a V6 cleaning liquid produced water side return valve; v7 raw water tank mud valve.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention.
Example 1
1. Introduction to tubular Ultrafiltration Membrane
The tubular ultrafiltration membrane system is characterized in that waste water containing suspended solids is conveyed into an external tubular membrane component through a pump for filtration, permeate liquid is continuously discharged, sludge intercepted by micropores of an ultrafiltration membrane returns to a concentration tank, and the sludge is discharged to a sludge treatment system for dehydration treatment after the concentration of the sludge is concentrated to a certain concentration.
After the water flow containing the filtered substances (mud-water mixture) permeates the membrane, macromolecular organic matters are intercepted and enter the water production side. In high-flow-velocity water flow (cross flow velocity of 3-5 m/s), the fluid is in a turbulent flow form, sludge intercepted by the membrane can not stay on the surface of the membrane, but a certain scouring effect is realized on the surface of the membrane, and pollutants are prevented from staying on the surface of the membrane, so that the tubular ultrafiltration membrane has good pollution resistance, and is less and simple to maintain.
2. The main body of the tubular ultrafiltration membrane for treating coal mine drainage water is shown in table 1, wherein a raw water tank of main equipment is shown in figure 2, and the tubular ultrafiltration membrane is shown in figure 3.
TABLE 1
3. Process flow
The overall flow is as follows: as shown in fig. 4.
The coal mine drained water is sent to a raw water tank at intervals by a lift pump, then is pumped into a tubular ultrafiltration membrane by a circulating pump for solid-liquid separation, all suspended solids in the mixed liquid are intercepted, produced water is discharged, and the concentrated solution returns to the raw water tank. The sludge concentration of the concentrated solution is gradually accumulated along with time and needs to be continuously discharged.
Example 2
As shown in fig. 1 to 4, according to embodiment 1, a tubular ultrafiltration membrane system includes a coal mine drainage water sedimentation tank 1, a raw water tank 4, a tubular ultrafiltration membrane 7, and a clean water tank 8, which are connected in sequence; the coal mine drainage water sedimentation tank is connected with a raw water tank 4 through a lift pump 2, the raw water tank 4 is connected with a tubular ultrafiltration membrane 7 through a circulating pump 6, the clear water outlet end of the tubular ultrafiltration membrane 7 is connected with a clear water tank 8, the sludge outlet end of the tubular ultrafiltration membrane 7 is connected with the raw water tank 4, the tubular ultrafiltration membrane is also connected with a cleaning component, the cleaning component comprises a cleaning water tank 5 and a cleaning water pipe 11, and the clear water outlet end of the tubular ultrafiltration membrane is also connected with the cleaning water pipe 11; the cleaning water pipe is connected with a water source, the sludge outlet end of the tubular ultrafiltration membrane is connected with the water inlet of the cleaning water tank, the water outlet of the cleaning water tank is connected with the circulating pump 6, and the clean water tank 8 is connected with the recycling tank 10 through the recycling water pump 9.
Coal mine drainage water enters a sedimentation tank firstly, primary sedimentation is carried out, then the coal mine drainage water enters an original water tank through a lifting pump, the coal mine drainage water is stirred and sedimentated in the original water tank again, the coal mine drainage water enters a tubular ultrafiltration membrane through a circulating pump, after filtration treatment is carried out in the tubular ultrafiltration membrane, clear water enters the clear water tank from a clear water outlet end, intercepted sludge water (sludge concentrated water) enters the original water tank from a sludge outlet end, the coal mine drainage water can enter the tubular ultrafiltration membrane again after treatment in the original water tank, circulation treatment of the coal mine drainage water is realized, the treatment effect is very obvious, the treated drainage water is clear and transparent, and can be directly recycled. Meanwhile, the sediment in the raw water tank is directly discharged from a sludge discharge port of the raw water tank. The tubular ultrafiltration membrane is cleaned, a clear water outlet end of the tubular ultrafiltration membrane is connected with a cleaning water pipe, the tubular ultrafiltration membrane is cleaned by clear water, cleaned sewage enters a cleaning water tank from a sludge outlet end, the cleaning water tank is connected with the tubular ultrafiltration membrane through a circulating pump 6, and the tubular ultrafiltration membrane is used for performing ultrafiltration on the cleaned sewage to realize the filtration and utilization of the cleaning water.
In this embodiment, the tubular ultrafiltration membrane comprises a tubular body 71, one end of the tubular body is provided with a water inlet end 72, an ultrafiltration component 73 is arranged in the tubular body, and the other end of the tubular body is provided with a clear water outlet end 74 and a sludge outlet end 75; the clear water outlet end is positioned below the ultrafiltration component. The working principle of the tubular ultrafiltration membrane is as follows: waste water gets into from the end of intaking, then through ultrafiltration module, ultrafiltration module is hollow fiber ultrafiltration membrane subassembly, and large granule impurity in the waste water can not pass through ultrafiltration module, consequently discharges from the play mud end of the other end, and the hydrone in the waste water can see through ultrafiltration module, consequently discharges from ultrafiltration module's below, realizes the separation purification to sewage.
In this embodiment, the washing water pipe is further connected to the water inlet of the washing water tank. The cleaning water pipe also cleans the cleaning water tank.
In this embodiment, a filter 3 is further provided between the lift pump and the raw water tank. The filter plays a role of preliminary filtration.
In this embodiment, the raw water tank includes a tank body 41 and a support 42, the tank body includes an upper cover 411, a middle cone 412 and a lower cylinder 413 which are sequentially arranged from top to bottom, the middle cone is provided with a raw water tank water inlet 43, a sludge inlet 44 and a stirring port 45, the middle of the lower cylinder is provided with a raw water tank water outlet 46, and the bottom of the lower cylinder is provided with a sewage outlet 47. A stirrer is arranged in the stirring port. Water in the sedimentation tank enters a water inlet of a raw water tank through a lift pump, then drained water is subjected to further sedimentation treatment in the raw water tank, the treated drained water enters a tubular ultrafiltration membrane from a water outlet of the raw water tank through a circulating pump for treatment, and the precipitated sludge is discharged from a sewage discharge outlet; and the sludge treated in the tubular ultrafiltration membrane enters the raw water tank again from the sludge inlet. The agitator adopts the motor agitator among the prior art, and the effect of agitator lies in: when the raw water tank is used for sedimentation treatment, a flocculating agent, a sedimentation agent and the like can be added into the upper cover body to accelerate sedimentation, and when the raw water tank is used for adding medicine, the stirring treatment accelerates sedimentation. Of course, when the concentration of the waste water is low, the upper cover body is not opened to add the medicine and the stirrer is detached when the medicine does not need to be added and the stirring is not needed.
In this embodiment, the bottom of the sedimentation tank and the raw water tank are connected with the sludge tank 12 through a sludge pump. Because the sedimentation tank and the raw water tank can both generate sludge through sedimentation, the sludge is effectively discharged through the sludge discharge pump.
In the embodiment, a circulating feed valve V1 is arranged between the raw water tank 4 and the circulating pump 6,
a circulating reflux valve V2 is arranged between the sludge outlet end of the tubular ultrafiltration membrane and the raw water tank;
a water production external discharge valve V3 is arranged between the clear water outlet end of the tubular ultrafiltration membrane 7 and the clear water tank 8;
a cleaning liquid feeding valve V4 is arranged between the cleaning water tank and the circulating pump;
a cleaning liquid return valve V5 is arranged between the sludge outlet end of the tubular ultrafiltration membrane and the cleaning water tank;
a return valve V6 on the water producing side of the cleaning liquid is arranged between the cleaning water pipe and the cleaning water tank;
a sludge discharge valve V7 is arranged between the raw water tank and the sludge tank.
Example 3
The invention also discloses a method for treating coal mine drainage water by using the tubular ultrafiltration membrane system, which comprises the following process steps:
firstly, conveying coal mine drainage water to a coal mine drainage water sedimentation tank for sedimentation treatment;
secondly, injecting the coal mine drainage water subjected to precipitation treatment into a raw water tank;
thirdly, after the raw water tank is filled with water, performing precipitation treatment, allowing drained water in the raw water tank to enter the tubular ultrafiltration membrane through a circulating pump, performing solid-liquid separation in the tubular ultrafiltration membrane, returning a concentrated solution to the raw water tank, and allowing clear water to enter a clear water tank;
fourthly, cleaning the tubular ultrafiltration membrane by external clear water, feeding the cleaned sewage into a cleaning water tank, and returning the sewage in the cleaning water tank to the tubular ultrafiltration membrane for solid-liquid separation treatment;
and fifthly, allowing the clean water in the clean water tank to enter a recycling pool for recycling.
Example 4
Specific operation procedure
4.1 feeding:
a lifting pump is arranged in a coal mine drainage water sedimentation tank, and an operator needs to additionally start the lifting pump to fill the original water tank with supernatant liquid every 2 hours or so.
4.2 start-up & continuous run:
the circulating pump can be started by opening the circulating feed valve V1, the circulating reflux valve V2 and the produced water discharge valve V3 (the valve numbers are shown in the attached figures) and pressing a start button in the control box. In the initial stage of the operation, the opening of the circulating reflux valve V2 is adjusted to make the film outlet pressure be about 0.5 bar. When running continuously, the flux will show a gradual decline and can be maintained daily by increasing the inlet and outlet membrane pressure (decreasing the opening of the recycle return valve V2), but it is necessary to ensure that the recycle flow is at least greater than 7m 3/h.
The operator needs to record related operation data (circulation flow, membrane inlet and outlet pressure, water production flow, water temperature and the like) every 2 hours, and samples and detects the quality (SS and turbidity) of the produced water at regular time.
4.3, discharging sludge:
along with the solid-liquid separation of the inlet water and the tubular membrane, the sludge concentration of the concentrated solution is prevented from gradually increasing, and the membrane is polluted and blocked by overhigh sludge concentration, so that the sludge concentration needs to be controlled within a target concentration range (about 15 g/L).
The operator can calculate the sludge discharge according to the suspended matter concentration of the incoming water:
q sludge (m 3/h) = Q water production (m 3/h) × ρ water sludge (g/L) ÷ ρ sludge discharge (15 g/L)
And after calculation, adjusting a sludge discharge valve V7 of the raw water tank, adjusting the sludge discharge amount as a calculated value, and regularly detecting the concentration of suspended matters in the concentrated solution in the raw water tank for adjustment.
4.4 shutdown:
carrying out mud jacking: when the machine needs to be stopped, the cleaning water tank needs to be filled, a cleaning liquid feeding valve V4, a concentrated liquid return valve V2 and a cleaning liquid water production side return valve V6 are opened, and water is used for ejecting the sludge of the membrane tube back to the raw water tank through the circulating pump.
Cleaning: and (3) filling the cleaning water tank, opening a cleaning liquid feeding valve V4, a cleaning liquid return valve V5 and a cleaning liquid water production side return valve V6, and cleaning for 1-2 times by using water. Finally, the membrane tube and the water producing side are filled with water to ensure that the membrane is wet.
Meanwhile, the wastewater in the raw water tank needs to be fully stirred (compressed air or manually) during operation in the next day, so that the blockage of the membrane tube by large-sized bottom-sinking sludge is avoided.
4.5, chemical cleaning:
when the flux is lower than the target value, a chemical cleaning is required. Chemical cleaning requires a cleaning mode determined by the fouling factor. If inorganic scaling substances are blocked, the inorganic scaling substances are washed by acid, and if the organic substances are blocked, the organic substances are washed by acid, alkali and acid (the flux can be recovered according to the first-time acid washing, the acid adopts hydrochloric acid with the pH value of 2-3, and the alkali adopts liquid alkali with the pH value of 10-11).
During chemical cleaning, the cleaning water tank is filled with acid, alkali or water, the cleaning liquid feed valve V4, the cleaning liquid reflux valve V5 and the cleaning liquid water production side reflux valve V6 are opened, and the circulating pump is started. Before chemical cleaning, top mud and clear water are needed for cleaning, clear water is needed to be used for washing between acid-base chemical cleaning, and finally clear water is used for washing until the water is neutral.
Judging the effectiveness of chemical cleaning: the clear water flux is more than 200L/m2 & h, preferably more than 300L/m2 & h.
5. Data analysis was performed as shown in fig. 5 and 6.
5.1 the flux of the tubular ultrafiltration system is stable, and the flux is always maintained above 40L/h (60L/m 2. h) in the whole test period.
5.2 due to the abnormal change of the turbidity of the raw water and the oil content, the water yield of the membrane system is reduced rapidly between 11 months 10 and 11 months 11, and the chemical cleaning is carried out. The flow rate after cleaning is more than 40L/h.
5.3 As shown in the figure, the membrane system water turbidity is really stable at 0.2-0.5NTU (< 1 NTU).
6. Conclusion
The water yield of the 6.1 tubular ultrafiltration membrane is stable, and the water yield per unit membrane area is always stable to be more than 70L/m2 & h in an operation period of 25 days.
The 6.2 tubular ultrafiltration membrane has long cleaning period and does not need chemical cleaning after continuously running for 20 days.
The filtration precision of the 6.3 tubular ultrafiltration membrane is 30nm, and the turbidity of the effluent is 0.2-0.5 NTU.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.
Claims (6)
1. A tubular ultrafiltration membrane system, comprising: the system comprises a coal mine drainage water sedimentation tank, a raw water tank, a tubular ultrafiltration membrane and a clean water tank which are connected in sequence; the coal mine drainage water sedimentation tank is connected with a raw water tank through a lift pump, the raw water tank is connected with a tubular ultrafiltration membrane through a circulating pump, the clear water outlet end of the tubular ultrafiltration membrane is connected with a clear water tank, the sludge outlet end of the tubular ultrafiltration membrane is connected with the raw water tank, the tubular ultrafiltration membrane is also connected with a cleaning component, the cleaning component comprises a cleaning water tank and a cleaning water pipe, and the clear water outlet end of the tubular ultrafiltration membrane is also connected with the cleaning water pipe; the water source is connected to the washing water pipe, the water inlet of washing water tank is connected to the play mud end of tubular milipore filter, the delivery port of washing water tank connects the circulating pump, the clean water pond passes through the retrieval and utilization water pump and connects the retrieval and utilization pond.
2. The tubular ultrafiltration membrane system of claim 1, wherein: the tubular ultrafiltration membrane comprises a tube body, wherein one end of the tube body is provided with a water inlet end, an ultrafiltration component is arranged in the tube body, and the other end of the tube body is provided with a clear water outlet end and a sludge outlet end; the clear water outlet end is positioned below the ultrafiltration component.
3. The tubular ultrafiltration membrane system of claim 1, wherein: the cleaning water pipe is also connected with a water inlet of the cleaning water tank.
4. The tubular ultrafiltration membrane system of claim 1, wherein: and a filter is also arranged between the lift pump and the raw water tank.
5. The tubular ultrafiltration membrane system of claim 1, wherein: the raw water tank comprises a tank body and a support, the tank body comprises an upper cover body, a middle conical body and a lower barrel body, the upper cover body, the middle conical body and the lower barrel body are sequentially arranged from top to bottom, a raw water tank water inlet and a sludge inlet are formed in the middle conical body, a raw water tank water outlet is formed in the middle of the lower barrel body, and a sewage discharge outlet is formed in the bottom of the lower barrel body.
6. The tubular ultrafiltration membrane system of claim 1, wherein: the bottom of the sedimentation tank and the bottom of the raw water tank are both connected with a sludge tank through a sludge discharge pump.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110304692A (en) * | 2019-06-20 | 2019-10-08 | 北京朗新明环保科技有限公司南京分公司 | A kind of tubular ultra-filtration membrane system and the method for handling coal mine drainage water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304692A (en) * | 2019-06-20 | 2019-10-08 | 北京朗新明环保科技有限公司南京分公司 | A kind of tubular ultra-filtration membrane system and the method for handling coal mine drainage water |
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