CN117446885A - Water purification system based on milipore filter - Google Patents
Water purification system based on milipore filter Download PDFInfo
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- CN117446885A CN117446885A CN202311776262.2A CN202311776262A CN117446885A CN 117446885 A CN117446885 A CN 117446885A CN 202311776262 A CN202311776262 A CN 202311776262A CN 117446885 A CN117446885 A CN 117446885A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 219
- 238000000746 purification Methods 0.000 title claims abstract description 31
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 83
- 239000012528 membrane Substances 0.000 claims abstract description 63
- 230000002776 aggregation Effects 0.000 claims description 78
- 238000004220 aggregation Methods 0.000 claims description 78
- 239000012535 impurity Substances 0.000 claims description 75
- 238000012512 characterization method Methods 0.000 claims description 48
- 238000001514 detection method Methods 0.000 claims description 32
- 238000003756 stirring Methods 0.000 claims description 19
- 238000005086 pumping Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 9
- 238000005457 optimization Methods 0.000 claims description 7
- 238000009825 accumulation Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000002596 correlated effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 239000010865 sewage Substances 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005374 membrane filtration Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000011403 purification operation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/22—Controlling or regulating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/11—Turbidity
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- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to the technical field of water treatment, in particular to a water purification system based on an ultrafiltration membrane.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a water purification system based on an ultrafiltration membrane.
Background
Along with the enhancement of environmental awareness, the requirements on water pollution treatment are higher and higher, the development of industry can avoid discharging a large amount of sewage containing various harmful substances, and if the sewage is not treated timely and thoroughly, the sewage is liable to bring great influence to the life of people, so that various water purifying equipment and water purifying measures become necessary supporting facilities for industrial production.
Ultrafiltration technology and ultrafiltration equipment are widely used technical modes in recent years in the field of water treatment, with the continuous deep research on ultrafiltration membranes, immersion ultrafiltration technology is one of the most widely used technical means, in recent years, the related field technicians continuously refine the research on various functional parameters of the ultrafiltration equipment, the frequency of abnormal occurrence such as common membrane pore blocking and wire breakage of the immersion ultrafiltration equipment is rapidly reduced, and the ultrafiltration technology is more mature.
For example, chinese patent: the invention discloses a water purification system of an immersed ultrafiltration membrane, which is characterized in that a raw water tank is connected with a self-cleaning filter through a pipeline provided with a water inlet pump, the self-cleaning filter is connected with a raw water inlet below an ultrafiltration membrane core pressure container through a water inlet pipeline provided with a water inlet valve and a water inlet pressure gauge in sequence, and a water outlet above the ultrafiltration membrane core pressure container is connected with a water production tank through a water production pipeline provided with a water production pressure gauge, a water production flow gauge and a water production valve in sequence, so that the problem that the unit area design flux of a general immersed ultrafiltration membrane filtration system is lower than that of a continuous membrane filtration technology is solved.
The prior art has the following problems;
the prior art does not consider that the water quality conditions of different water areas are different due to impurity deposition, the prior art can not adaptively adjust the operation parameters according to the different water quality conditions of different water areas, can not timely stop purifying according to the influence degree of water on membrane hole blocking, and is easy to cause ultrafiltration membrane blocking, so that the service life of the ultrafiltration membrane is influenced.
Disclosure of Invention
Therefore, the invention provides a water purification system based on an ultrafiltration membrane, which is used for solving the problems that in the prior art, the operation parameters cannot be adaptively adjusted according to different water quality conditions of different water areas, and the purification cannot be stopped in time according to the influence degree of water on membrane hole blockage.
In order to achieve the above object, the present invention provides a water purification system based on an ultrafiltration membrane, comprising:
a moving bracket including a bracket and a moving unit provided on the bracket to be movable at a predetermined speed along the bracket;
the ultrafiltration module comprises a water purifying unit and a swabbing pump, wherein the water purifying unit is arranged at one end of the mobile unit and used for purifying water, and the swabbing pump is arranged on a water outlet of the water purifying unit and used for pumping water;
a rotation module including stirring bars symmetrically provided on the moving unit by a driving part to stir a medium at the periphery of the moving unit;
the detection module comprises a turbidity detection unit, a water pressure detection unit and a stress detection unit, wherein the turbidity detection unit is arranged on the ultrafiltration module and used for detecting the turbidity of a water body, the water pressure detection unit is used for detecting the water pressure of the effluent of the ultrafiltration module, and the stress detection unit is arranged on a single stirring rod and used for detecting the stress value of the stirring rod;
the data aggregation unit is connected with the detection module and used for calculating an impurity aggregation characterization parameter based on the water turbidity and the stress value so as to judge whether the system operation parameter needs to be adjusted;
an execution unit respectively connected with the movable support, the rotation module and the data aggregation unit for adjusting the system operation parameters based on the impurity aggregation characterization parameters, comprising,
adjusting a moving speed of the moving unit;
or, controlling the rotation module to start and adjusting the rotation speed of the rotation module;
and the optimizing unit is connected with the detecting module and the ultrafiltration module and is used for adjusting the running power of the swabbing pump based on the change condition of the water outlet pressure.
Further, the data aggregation unit calculates the impurity aggregation characterization parameter P according to a formula,
，
in the formula, T s T is the turbidity of the water body s0 Is a preset reference value of the turbidity of the water body, F v For the stress value, F v0 And (3) taking the value as a preset stress reference value, wherein alpha is a turbidity weight coefficient, and beta is a stress weight coefficient, wherein alpha+beta=1.
Further, the data aggregation unit compares the impurity aggregation characterization parameter with a preset impurity aggregation characterization parameter threshold to judge whether the system operation parameter needs to be adjusted;
and if the impurity aggregation characterization parameter is larger than the impurity aggregation characterization parameter threshold, the data aggregation unit judges that the system operation parameter needs to be adjusted.
Further, the execution unit is further configured to compare the impurity aggregation characterizing parameter with a preset impurity aggregation characterizing parameter comparison value to select an adjustment mode for the operation parameter, where,
if the impurity aggregation characterization parameter is smaller than or equal to the impurity aggregation characterization parameter contrast value, the execution unit selects and adjusts the moving speed of the mobile unit;
if the impurity aggregation characterization parameter is larger than the impurity aggregation characterization parameter contrast value, the execution unit selects to control the rotation module to start and adjust the rotation speed of the rotation module;
wherein the impurity aggregation characterization parameter contrast value is greater than the impurity aggregation characterization parameter threshold.
Further, the adjustment amount of the execution unit for adjusting the moving speed of the moving unit is positively correlated with the magnitude of the impurity aggregation characterization parameter.
Further, a plurality of rotation speed adjusting modes for adjusting the rotation speed of the rotation module based on the impurity aggregation characterization parameters are preset in the execution unit;
the rotation speed adjustment modes are different in adjustment amount of the rotation speed of the rotation module.
Further, the optimizing unit is also used for obtaining the change condition of the water pressure of the water outlet, wherein,
and calculating a water pressure difference value between the water outlet pressure and a preset water outlet pressure initial value, wherein the water outlet pressure initial value is determined based on a water pressure average value of the water pressure detection unit in a preset time period.
Further, a plurality of power adjustment modes for adjusting the operation power of the pumping pump based on the water pressure difference value are preset in the optimization unit;
the power adjustment modes are different in adjustment amount of the operating power of the pumping pump.
Further, the optimizing unit is further configured to compare the water pressure difference value with a preset water pressure difference value early-warning value, so as to control whether the moving unit stops moving;
and if the water pressure difference value is larger than the water pressure difference value early warning value, the optimizing unit controls the moving unit to stop moving.
Further, the optimizing unit is also connected with the alarm unit and used for sending out prompt information that the mobile unit stops moving.
Compared with the prior art, the invention has the beneficial effects that the mobile bracket, the ultrafiltration module, the rotation module, the detection module, the data aggregation unit, the execution unit and the optimization unit are arranged, the impurity aggregation characterization parameter is calculated through the data aggregation unit to judge whether the system operation parameter needs to be adjusted, the execution unit is used for adjusting the moving speed of the mobile unit based on the impurity aggregation characterization parameter, or the rotation module is controlled to be started and the rotation speed of the rotation module is adjusted, and the operation power of the pump is adjusted through the optimization unit based on the change condition of the water outlet pressure, so that the operation parameter is adjusted according to the adaptability of different water quality conditions of different water areas, the purification is stopped timely according to the influence degree of water on the blockage of the membrane holes, the frequency of cleaning the ultrafiltration membrane due to blockage is reduced, and the service life of the ultrafiltration membrane is prolonged.
In particular, according to the invention, the impurity polymerization characterization parameters are calculated through the data polymerization unit, in an actual scene, impurities are slowly deposited at the bottom in the standing process of sewage, so that impurities, microorganisms and other substances in the water body are accumulated in a lower layer area, the turbidity and the viscosity of the water quality in the lower layer area are relatively large.
In particular, the moving speed of the moving unit is regulated by the executing unit, the actual ultrafiltration membrane purification process is carried out from the liquid level with better water quality, the water area with worse water quality is gradually purified, the moving speed of the ultrafiltration module in the water is driven by the moving unit, the accuracy of judging the water quality of the system can be influenced, the condition of accurately detecting and calculating the water quality is required under the condition of slightly worse water quality condition, and the adaptive regulation is timely carried out, so that the accurate judgment of the water quality state is realized.
Particularly, the rotary module is controlled to be started by the execution unit and the rotation speed of the stirring rod of the rotary module is adjusted, in the actual ultrafiltration membrane purification process, under the condition of poor water quality condition, the rotary module is started, the stirring rod of the rotary module rotates to drive the surrounding water area to generate vortex, so that impurities in water are not easy to gather on the ultrafiltration membrane, the speed of the rotary module can be adjusted along with the deterioration of the water quality condition, the larger vortex generated by the faster rotation speed can impact and drop the impurities just gathered on the ultrafiltration membrane, further, the operation parameters are adaptively adjusted according to different water quality conditions of different water areas, the times of cleaning the ultrafiltration membrane due to blockage are reduced, and the service life of the ultrafiltration membrane is prolonged.
In particular, the invention adjusts the operation power of the swabbing pump based on the change condition of the water outlet pressure through the optimizing unit, in the actual ultrafiltration membrane purification process, the water quality with larger viscosity or higher impurity content is purified, the water flux of the ultrafiltration membrane is influenced more, the water outlet pressure of the water outlet is smaller, that is, the water quality with larger viscosity or higher impurity content is purified as compared with the previous pressure difference value, the solute or the particulate matters attached to the surface of the ultrafiltration membrane are easily accumulated to form a layer of resistance layer, the excessive swabbing power in the ultrafiltration module can more easily cause the resistance layer to be rapidly formed, and the pressure polarization is generated on the surface of the ultrafiltration membrane.
In particular, the invention controls whether the mobile unit stops moving or not through the optimizing unit, and in the actual ultrafiltration membrane purification process, under the condition that the impurity particle content of the water quality is extremely high, the ultrafiltration module should be controlled to stop water purification operation in time, so as to avoid blocking membrane holes of the ultrafiltration membrane under extremely poor water quality conditions and even more serious wire breakage faults.
Drawings
FIG. 1 is a system block diagram of an ultrafiltration membrane based water purification system in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of a water purification system based on ultrafiltration membrane according to an embodiment of the present invention;
FIG. 3 is a functional block diagram of a detection module according to an embodiment of the present invention;
FIG. 4 is a logic flow diagram of a data aggregation unit according to an embodiment of the present invention;
in the figure, 1: support, 2: mobile unit, 3: water purifying unit, 4: pumping pump, 5: rotation module, 6: turbidity detection unit, 7: water pressure detecting element, 8: stress detection unit, 9: rotatable mount, 10: stirring rod.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1 to 3, fig. 1 is a system block diagram of an ultrafiltration membrane-based water purification system according to an embodiment of the present invention, fig. 2 is a schematic structural diagram of an ultrafiltration membrane-based water purification system according to an embodiment of the present invention, and fig. 3 is a functional block diagram of a detection module according to an embodiment of the present invention, where the ultrafiltration membrane-based water purification system of the present invention includes:
a moving bracket including a bracket 1 and a moving unit 2 provided on the bracket 1 to be movable at a predetermined speed along the bracket 1;
the ultrafiltration module comprises a water purifying unit 3 arranged at one end of the mobile unit 2 and used for purifying water, and a swabbing pump 4 arranged on a water outlet of the water purifying unit 3 and used for pumping water;
a rotation module 5 including stirring bars 10 symmetrically provided on the moving unit 2 by a driving part to stir a medium at the periphery of the moving unit 2;
the detection module comprises a turbidity detection unit 6 arranged on the ultrafiltration module and used for detecting the turbidity of a water body, a water pressure detection unit 7 used for detecting the water pressure of the effluent of the ultrafiltration module, and a stress detection unit 8 arranged on a single stirring rod 10 and used for detecting the stress value of the stirring rod 10;
the data aggregation unit is connected with the detection module and used for calculating an impurity aggregation characterization parameter based on the water turbidity and the stress value so as to judge whether the system operation parameter needs to be adjusted;
an execution unit respectively connected with the movable support, the rotation module 5 and the data aggregation unit for adjusting the system operation parameters based on the impurity aggregation characterization parameters, including,
adjusting the moving speed of the moving unit 2;
or, controlling the rotation module 5 to start and adjusting the rotation speed of the rotation module 5;
the optimizing unit is connected with the detecting module and the ultrafiltration module and is used for adjusting the operation power of the swabbing pump 4 based on the change condition of the water outlet pressure.
Specifically, the moving mode of the moving unit 2 is not limited, and preferably, in the embodiment of the present invention, the hydraulic mechanism may be selected to drive the telescopic arm to realize the movement of the moving unit 2 in different depth positions in water, and the hydraulic telescopic technology is the prior art and will not be described herein.
Specifically, the specific structure of the water purifying unit 3 is not limited, in the embodiment of the invention, an immersed ultrafiltration membrane water purifying device can be selected, the immersed ultrafiltration membrane water purifying device generally submerges the ultrafiltration membrane partially or completely in water to form an interface of a membrane surface and water contact, water cleaned by the ultrafiltration membrane flows out through a water outlet arranged on the device, and the cleaned water is conveyed through a water pipe connected to the water outlet by the aid of a pumping pump 4, so that the immersed ultrafiltration membrane water purifying device is widely used in the process of purifying factory sewage and municipal sewage, and is not repeated here.
Specifically, the specific structure of the pump 4 is not limited, and in the embodiment of the present invention, it may be a centrifugal pump or a plunger pump, which is the prior art and will not be described herein.
Specifically, the specific structure of the rotation module 5 is not limited, in the embodiment of the present invention, the motor may be selected to drive the rotatable support 9 of the fixed stirring rod 10 to rotate around the annular track on the telescopic arm of the moving unit 2, so as to drive the stirring rod 10 to rotate, and generate vortex in water.
Specifically, the specific structure of the turbidity detection unit 6 is not limited, in the embodiment of the present invention, a turbidity meter may be used to detect the turbidity of the water body, the turbidity of the water body is determined by measuring the scattering degree of light in the water, the turbidity detection unit comprises a light source, a light scattering detector and a display screen, and the numerical result of the turbidity can be sent to a data aggregation unit through a data sending device, which is the prior art and is not described herein again.
Specifically, the specific structure of the water pressure detecting unit 7 is not limited in the present invention, in the embodiment of the present invention, the water pressure detecting unit 7 includes a pressure sensor, a connection pipeline and a signal processing circuit, and the pressure information is converted into a corresponding electrical signal to be output by measuring the pressure applied to the sensor by the water body, which is not described herein.
Specifically, the specific structure of the stress detection unit 8 is not limited, and preferably, in this embodiment, the preferred structure is composed of a stress collector and a data transmission module, and the data collected by the stress collector is transmitted to the data aggregation unit through the data transmission module, which is in the prior art and is not described herein.
Specifically, the specific structures of the data aggregation unit, the execution unit and the optimization unit are not limited, and the data aggregation unit, the execution unit and the optimization unit can be formed by logic components, wherein the logic components can be field programmable logic components, microprocessors, processors used in computers and the like, and are not described herein.
In particular, referring to fig. 4, which is a logic flow diagram of a data aggregation unit according to an embodiment of the present invention, the data aggregation unit calculates the impurity aggregation characterizing parameter P according to a formula,
，
in the formula, T s T is the turbidity of the water body s0 Is a preset reference value of the turbidity of the water body, F v For the stress value, F v0 And (3) taking the value as a preset stress reference value, wherein alpha is a turbidity weight coefficient, and beta is a stress weight coefficient, wherein alpha+beta=1.
Preferably, the turbidity reference value T of the water body s0 Based on the pre-test, pre-testing and recording the average turbidity value of the water body for a certain time period for a plurality of times, calculating the average value of the average turbidity values of the water body, and determining the average value as the reference value T of the turbidity of the water body s0 The method comprises the steps of carrying out a first treatment on the surface of the Force reference value F v0 Based on the pre-calculation, the average value F of the stress values of the rotation module 5 in water with different depths is pre-calculated m ，F v0 =λ×F m Lambda is a value factor, and the value range of lambda is [0.25,0.35 ]]。
Specifically, the impurity polymerization characterization parameters are calculated through the data polymerization unit, in an actual scene, impurities are slowly deposited at the bottom in the standing process of sewage, so that impurities, microorganisms and other substances in a water body are accumulated in a lower layer area, turbidity and viscosity of water quality in the lower layer area are relatively large.
Specifically, the data aggregation unit compares the impurity aggregation characterization parameter P with a preset impurity aggregation characterization parameter threshold Px to determine whether the system operation parameter needs to be adjusted;
and if the impurity aggregation characterization parameter P is larger than the impurity aggregation characterization parameter threshold Px, the data aggregation unit judges that the system operation parameters need to be adjusted.
Preferably, in the embodiment of the present invention, the value range of the impurity aggregation characterization parameter threshold Px is [1.15,1.2].
In particular, the execution unit is further configured to compare the impurity aggregation characterizing parameter P with a preset impurity aggregation characterizing parameter contrast value Py to select a manner of adjusting an operation parameter, wherein,
if the impurity aggregation characterization parameter is smaller than P or equal to the impurity aggregation characterization parameter contrast value Py, the execution unit selects and adjusts the moving speed of the moving unit 2;
if the impurity aggregation characterization parameter Py is greater than the impurity aggregation characterization parameter contrast value Py, the execution unit selects to control the rotation module 5 to start and adjust the rotation speed of the rotation module 5;
wherein the impurity aggregation characterizing parameter contrast value Py is greater than the impurity aggregation characterizing parameter threshold Px, py=1.15×px.
Specifically, the amount of adjustment of the movement speed of the mobile unit 2 by the execution unit is positively correlated with the magnitude of the impurity accumulation characterization parameter.
Preferably, in the present embodiment, at least three moving speed adjustment modes for adjusting the moving speed of the moving unit 2 based on the impurity aggregation characterizing parameter P are set, wherein the impurity aggregation characterizing parameter P is compared with a preset first comparison characterizing parameter Pa and second comparison characterizing parameter Pb,
if P < Pa, the first moving speed adjusting mode is adjusted to adjust the moving speed of the moving unit 2 to a first moving speed V 1 Set V 1 =V 0 －v 1 ；
If Pa is less than or equal to P is less than or equal to Pb, the moving unit is adjusted to a second moving speed adjusting mode, and the second moving speed adjusting mode is used for adjusting the moving speed of the moving unit 2 to a second moving speed V 2 Set V 2 =V 0 －v 2 ；
If P > Pb, the movement speed of the mobile unit 2 is adjusted to a third movement speed adjusting mode, wherein the third movement speed adjusting mode is to adjust the movement speed to a third movement speed V 3 Set V 3 =V 0 －v 3 ；
Wherein V is 0 Represents an initial value of the moving speed of the mobile unit 2,v 1 the first movement speed adjustment amount is indicated,v 2 representing a second movement speed adjustment amount, +.>v 3 Representing the third movement speed adjustment amount, in the present embodiment, in order to enable the first comparison characteristic parameter Pa and the second comparison characteristic parameter Pb to distinguish the differences of different water qualities, pa=1.05×px, pb=1.1×px are set in the present embodiment, in order to make adjustment effective and avoid the adjustment amount from being excessively large, in the present embodiment, 0.2V 0 ≤/>v 1 ＜/>v 2 ＜/>v 3 ≤0.5V 0 。
Specifically, the moving speed of the moving unit 2 is adjusted through the executing unit, the actual ultrafiltration membrane purifying process is carried out from the liquid level with better water quality, the water with worse water quality is gradually purified, the moving speed of the moving unit 2 driving the ultrafiltration module in the water is faster, the judging accuracy of the system on the water quality can be influenced, the condition of the water quality needs to be accurately detected and calculated under the condition of slightly worse water quality condition, and the adaptive adjustment is timely carried out, so that the accurate judgment on the water quality state is realized.
Specifically, a plurality of rotation speed adjustment modes for adjusting the rotation speed of the rotation module 5 based on the impurity aggregation characterization parameters are preset in the execution unit;
the rotational speed adjustment amounts of the rotational modules 5 are different from each other in the rotational speed adjustment manner.
Preferably, in the present embodiment, at least three rotational speed adjustment modes for adjusting the rotational speed of the rotational module 5 based on the impurity aggregation characterizing parameter P are set, wherein the impurity aggregation characterizing parameter P is compared with a preset third comparison characterizing parameter Pm and fourth comparison characterizing parameter Pn,
if P < Pm, the first rotation speed adjusting mode is a first rotation speed adjusting mode for adjusting the rotation speed of the rotation module 5 to a first rotation speed W 1 Setting W 1 =W 0 ＋w 1 ；
If Pm is less than or equal to P is less than or equal to Pn, the rotation module is adjusted to a second rotation speed adjusting mode, and the second rotation speed adjusting mode is to adjust the rotation speed of the rotation module 5 to a second rotation speed W 2 Setting W 2 =W 0 ＋w 2 ；
If P > Pn, adjustA third rotation speed adjusting mode for adjusting the rotation speed of the rotation module 5 to a third rotation speed W 3 Setting W 3 =W 0 ＋w 3 ；
Wherein W is 0 An initial value of the rotational speed of the rotation module 5 is indicated,w 1 indicating the first rotation speed adjustment amount,w 2 representing a second rotational speed adjustment amount, +.>w 3 Representing the third rotation speed adjustment amount, in the present embodiment, in order to enable the third comparison characteristic parameter Pm and the fourth comparison characteristic parameter Pn to distinguish the differences of different water qualities, pm=1.2×px, pn=1.25×px is set in the present embodiment, in order to make the adjustment effective and avoid the adjustment amount from being excessively large, in the present embodiment, 0.1W 0 ≤/>w 1 ＜/>w 2 ＜/>w 3 ≤0.3W 0 。
Specifically, the rotary module 5 is controlled to be started by the execution unit and the rotation speed of the stirring rod 10 of the rotary module 5 is regulated, in the actual ultrafiltration membrane purification process, under the condition of poor water quality condition, the rotary module 5 is started, the stirring rod 10 of the rotary module 5 rotates to drive surrounding water areas to generate vortex, so that impurities in water are not easy to gather on the ultrafiltration membrane, the speed of the rotary module 5 can be regulated along with the deterioration of the water quality condition, the impurities just gathered on the ultrafiltration membrane can be impacted and shed by the larger vortex generated by the faster rotation speed, and further, the running parameters are adaptively regulated according to different water quality conditions of different water areas, the times of cleaning the ultrafiltration membrane due to blockage are reduced, and the service life of the ultrafiltration membrane is prolonged.
In particular, the optimizing unit is also used for obtaining the change condition of the water outlet pressure, wherein,
calculating the water outlet pressure Q and a preset initial value Q of the water outlet pressure 0 Is the water pressure difference Q of (2) c ，Q c =|Q 0 -Q|, the initial value of the water pressure of the water outlet Q 0 Based on the average value Q of the water pressure detection unit 7 in a preset time period av And (5) determining.
Specifically, in this embodiment, the preset time period is a time period when the ultrafiltration module determines that the water quality is good, and does not need to adjust the system operating parameters, and the average value Q of the water pressure in the time period is calculated av Average value Q of the water pressure av Is determined as the initial value Q of the water pressure of the water outlet 0 。
Specifically, a plurality of power adjustment modes for adjusting the operation power of the pumping pump 4 based on the water pressure difference value are preset in the optimization unit;
wherein, the power adjustment modes are different in the adjustment amount of the operation power of the pumping pump 4.
Preferably, in the present embodiment, at least three kinds of hydraulic pressure difference values Q are set based on the hydraulic pressure difference values c A power adjustment mode for adjusting the operation power of the pump 4, wherein the water pressure difference Q is calculated c With a preset first water pressure difference contrast value Q c1 Second water pressure difference contrast value Q c2 In the comparison of the two types of materials,
if Q c ＜Q c1 Then the first power adjustment mode is adjusted, wherein the first power adjustment mode is to adjust the operation power of the pumping pump 4 to a first operation power K 1 Setting K 1 =K 0 －k 1 ；
If Q c1 ≤Q c ≤Q c2 A second power adjustment mode is adopted, wherein the second power adjustment mode is to adjust the operation power of the pumping pump 4 to a second operation power K 2 Setting K 2 =K 0 －k 2 ；
If Q c ＞Q c2 Then adjust to the third power adjustment mode K 3 The third power adjustment mode is to adjust the operation power of the pump 4 to a third operation power K 3 Setting K 3 =K 0 －k 3 ；
Wherein K is 0 An initial value of the operation power of the pump 4 is shown,k 1 representing a first operating power adjustment quantity, +.>k 2 Representing a second operating power adjustment quantity, +.>k 3 Represents a third operating power adjustment, in this embodiment, to provide a first differential water pressure versus the value Q c1 Second water pressure difference contrast value Q c2 Can distinguish the difference of different water quality on the influence degree of the water outlet pressure, and in the embodiment, Q is set c1 =0.1MPa，Q c2 =0.13 MPa, in order to make the adjustment effective and avoid the adjustment amount being too large, in this embodiment, 0.1K 0 ≤/>k 1 ＜/>k 2 ＜/>k 3 ≤0.5K 0 。
Specifically, the invention adjusts the operation power of the swabbing pump 4 based on the change condition of the water outlet pressure through the optimizing unit, in the actual ultrafiltration membrane purification process, the water quality with larger viscosity or higher impurity content is purified, the water flux of the ultrafiltration membrane is influenced more, the water outlet pressure of the water outlet is smaller, that is, the water quality with larger viscosity or higher impurity content is purified compared with the previous pressure difference value, the solute or particulate matters attached to the surface of the ultrafiltration membrane are easily accumulated to form a layer of resistance layer, the excessive swabbing power in the ultrafiltration module can more easily form the resistance layer rapidly, and pressure polarization is generated on the surface of the ultrafiltration membrane.
Specifically, the optimizing unit is further configured to compare the water pressure difference value with a preset water pressure difference value early-warning value, so as to control whether the moving unit 2 stops moving;
if the water pressure difference value Q c Is larger than the water pressure difference early warning value Q cy The optimizing unit controls the moving unit 2 to stop moving.
Preferably, in the embodiment of the present invention, the water pressure difference early-warning value Q cy The value range of (5) is [0.15,0.2 ]]The interval unit is MPa.
Specifically, the invention controls whether the mobile unit 2 stops moving or not through the optimizing unit, and in the actual ultrafiltration membrane purification process, under the condition that the impurity particle content of the water quality is extremely high, the ultrafiltration module should be controlled to stop water purification operation in time, so that the extremely bad water quality condition is prevented from blocking the membrane holes of the ultrafiltration membrane, even more serious wire breakage faults occur.
Specifically, the optimizing unit is further connected to an alarm unit, so as to send out a prompt message that the mobile unit 2 stops moving.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An ultrafiltration membrane-based water purification system, comprising:
a moving bracket including a bracket and a moving unit provided on the bracket to be movable at a predetermined speed along the bracket;
the ultrafiltration module comprises a water purifying unit and a swabbing pump, wherein the water purifying unit is arranged at one end of the mobile unit and used for purifying water, and the swabbing pump is arranged on a water outlet of the water purifying unit and used for pumping water;
a rotation module including stirring bars symmetrically provided on the moving unit by a driving part to stir a medium at the periphery of the moving unit;
the detection module comprises a turbidity detection unit, a water pressure detection unit and a stress detection unit, wherein the turbidity detection unit is arranged on the ultrafiltration module and used for detecting the turbidity of a water body, the water pressure detection unit is used for detecting the water pressure of the effluent of the ultrafiltration module, and the stress detection unit is arranged on a single stirring rod and used for detecting the stress value of the stirring rod;
the data aggregation unit is connected with the detection module and used for calculating an impurity aggregation characterization parameter based on the water turbidity and the stress value so as to judge whether the system operation parameter needs to be adjusted;
an execution unit respectively connected with the movable support, the rotation module and the data aggregation unit for adjusting the system operation parameters based on the impurity aggregation characterization parameters, comprising,
adjusting a moving speed of the moving unit;
or, controlling the rotation module to start and adjusting the rotation speed of the rotation module;
and the optimizing unit is connected with the detecting module and the ultrafiltration module and is used for adjusting the running power of the swabbing pump based on the change condition of the water outlet pressure.
2. The ultrafiltration membrane-based water purification system according to claim 1, wherein the data aggregation unit calculates the impurity aggregation characterization parameter P according to a formula,
，
in the formula, T s T is the turbidity of the water body s0 Is a preset reference value of the turbidity of the water body, F v For the stress value, F v0 And alpha is a turbidity weight coefficient, and beta is a stress weight coefficient.
3. The ultrafiltration membrane-based water purification system according to claim 2, wherein the data aggregation unit compares the impurity aggregation characterization parameter with a preset impurity aggregation characterization parameter threshold to determine whether adjustment of system operation parameters is required;
and if the impurity aggregation characterization parameter is larger than the impurity aggregation characterization parameter threshold, the data aggregation unit judges that the system operation parameter needs to be adjusted.
4. The ultrafiltration membrane based water purification system of claim 1, wherein the execution unit is further configured to compare the impurity accumulation characterization parameter with a preset impurity accumulation characterization parameter contrast value to select a manner of adjusting the operating parameter, wherein,
if the impurity aggregation characterization parameter is smaller than or equal to the impurity aggregation characterization parameter contrast value, the execution unit selects and adjusts the moving speed of the mobile unit;
if the impurity aggregation characterization parameter is larger than the impurity aggregation characterization parameter contrast value, the execution unit selects to control the rotation module to start and adjust the rotation speed of the rotation module;
wherein the impurity aggregation characterization parameter contrast value is greater than the impurity aggregation characterization parameter threshold.
5. The ultrafiltration membrane based water purification system of claim 4, wherein the amount of adjustment of the movement speed of the mobile unit by the execution unit is positively correlated with the magnitude of the impurity aggregation characterizing parameter.
6. The ultrafiltration membrane-based water purification system according to claim 4, wherein a plurality of rotation speed adjustment modes for adjusting the rotation speed of the rotation module based on the impurity aggregation characterization parameters are preset in the execution unit;
the rotation speed adjustment modes are different in adjustment amount of the rotation speed of the rotation module.
7. The ultrafiltration membrane based water purification system of claim 1, wherein the optimization unit is further configured to obtain a change in the outlet water pressure, wherein,
and calculating a water pressure difference value between the water outlet pressure and a preset water outlet pressure initial value, wherein the water outlet pressure initial value is determined based on a water pressure average value of the water pressure detection unit in a preset time period.
8. The ultrafiltration membrane-based water purification system according to claim 7, wherein a plurality of power adjustment modes for adjusting the operation power of the pump based on the water pressure difference are preset in the optimizing unit;
the power adjustment modes are different in adjustment amount of the operating power of the pumping pump.
9. The ultrafiltration membrane based water purification system according to claim 7, wherein the optimizing unit is further configured to compare the water pressure difference value with a preset water pressure difference value pre-alarm value to control whether the moving unit stops moving;
and if the water pressure difference value is larger than the water pressure difference value early warning value, the optimizing unit controls the moving unit to stop moving.
10. The ultrafiltration membrane based water purification system according to claim 1, wherein the optimizing unit is further connected to an alarm unit for sending a notification that the mobile unit is stopped moving.
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