CN216837373U

CN216837373U - Intelligent filtering system integrating ceramic membrane micro cross flow filtering and dead end filtering

Info

Publication number: CN216837373U
Application number: CN202123343653.4U
Authority: CN
Inventors: 张炜; 张崇杰
Original assignee: Xi'an Baicui Electromechanical Equipment Co ltd
Current assignee: Xi'an Baicui Electromechanical Equipment Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-06-28
Anticipated expiration: 2031-12-28

Abstract

The utility model belongs to the technical field of water treatment, and relates to an intelligent filtering system integrating ceramic membrane micro cross flow filtration and dead end filtration, which comprises a raw water tank, a water inlet centrifugal pump, a ceramic membrane filter and a water storage barrel which are sequentially connected through pipelines; the filtering system comprises a cross flow filtering loop, a dead-end filtering loop, a positive flushing loop, a backwashing loop, a chemical cleaning loop and a reinforced backwashing loop, and each loop is controlled by a controller to enable the filtering system to realize a corresponding operation mode. According to the system, intelligent detection devices such as a pressure gauge, a flow transmitter, a floating ball liquid level switch and a conductivity measuring instrument are matched with corresponding operation algorithms, so that multifunctional intelligent filtration and full-automatic intelligent membrane column cleaning of ceramic membrane equipment are realized. Meanwhile, the forward and reverse washing water storage barrel used in various cleaning modes of the membrane column is integrated with the filtering pipeline of the device, so that the floor area of the ceramic membrane device is greatly saved, and the cleaning efficiency is improved.

Description

Intelligent filtering system integrating ceramic membrane micro cross flow filtering and dead end filtering

Technical Field

The utility model belongs to the technical field of the water treatment, a ceramic membrane filtration equipment is related to, especially relate to an intelligent filtration system who collects ceramic membrane little cross-flow and filter in an organic whole with the dead end.

Background

As is known in the art, a ceramic membrane filtration apparatus is a conventional water treatment filtration apparatus that uses an inorganic ceramic membrane material to retain impurities and uses cross-flow filtration to separate water from impurities in water. At present, ceramic membrane filtration equipment in the market adopts cross-flow filtration, and during cross-flow filtration, liquid enters a membrane channel from one end and flows out from the other end, because the flow rate of fluid in the membrane channel is very high, a part of attachments attached to the surface of a membrane can be swept by concentrated liquid during filtration and flows out together, and carriers attached to the inner surface of the membrane channel are less, so that the filtration form inevitably has the following defects:

firstly, in order to realize the optimal net liquid amount and prevent surface pollution, the flow rate of a film surface has high requirements: different concentrations and different temperatures have different requirements on the control of the flow rate of the membrane surface, but the actual operation is greatly influenced by external factors. Secondly, the net liquid amount only accounts for a certain proportion (about one twentieth to one forty) of the inlet flow, most of the fluid only passes through the membrane column without penetrating through the filter layer in order to maintain the membrane surface flow rate, so that the unit energy consumption of the cross-flow filtration is far greater than that of the dead-end filtration. Traditional cross flow filtration, the thick water returns to former water tank and can produce the pollution to the raw water to changed the concentration of raw water, along with the increase of system's operating duration, the heat that the circulating pump produced also can make the temperature of former water tank change, and the change of temperature makes the original viscosity of waiting to filter the liquid change, causes to produce the skew as the best membrane face velocity of flow of setting for one's time. And fourthly, any filtration has the interception rate of the filtration, and for stable raw water, the qualified filtration equipment can realize stable water production, but the concentration of the raw water tank subjected to cross flow filtration gradually accumulates, so that the quality of the produced water cannot be ensured. Fifthly, when the flow rate of the membrane surface cannot be well controlled, the water yield is reduced due to dirt blockage in long-term operation, and the cleaning of the membrane column can be carried out only by manually stopping the machine and accessing a clean water source, which inevitably causes the great reduction of the operation efficiency of equipment; and the circulating filtration of the concentrated water can increase the filtration time undoubtedly, and the concentrated solution with too high circulating concentration can increase the operation burden of the ceramic membrane column undoubtedly. Sixthly, because the ceramic membrane is polluted and needs to be subjected to acid-base washing treatment, the system needs to be provided with an acid-washing water tank, an alkali-washing water tank, a water purification tank and other equipment, so that the whole system is relatively complex and occupies a large area.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a collect ceramic membrane little cross-flow and filter and dead end filter in the intelligent filtration system of an organic whole to realize that the multi-functional intelligence of ceramic membrane system filters and the full-automatic intelligent of membrane post washs.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the intelligent filtering system integrating ceramic membrane micro cross flow filtration and dead-end filtration comprises a raw water tank, a water inlet centrifugal pump, a ceramic membrane filter and a water storage barrel which are sequentially connected through a pipeline, wherein the filtering system comprises a cross flow filtering loop, a dead-end filtering loop, a positive flushing loop, a backwashing loop, a chemical cleaning loop and a reinforced backwashing loop, and each loop is controlled by a controller to enable the filtering system to realize a corresponding operation mode; the water storage barrel is provided with a floating ball liquid level switch and a metering and dosing device which are respectively connected with the controller.

Further, the ceramic membrane filter comprises at least one ceramic membrane column, and the filtering flow of the ceramic membrane column is 1.8-4.3 m³/h。

Further, the stock solution of the raw water tank sequentially enters the ceramic membrane filter through a water inlet preposed valve, a preposed filter, a pre-pump pressure gauge, a water inlet valve of a water inlet pump, a conductivity measuring instrument, a water inlet centrifugal pump, a water inlet pressure gauge and a membrane column water inlet valve; the water storage device is characterized in that a purified water outlet of the ceramic membrane filter is communicated with a water inlet of the water storage barrel through a first pipeline, the purified water outlet of the ceramic membrane filter is further communicated with a water outlet of the water storage barrel through a second pipeline, a concentrated water outlet of the ceramic membrane filter is connected with three pipelines, a third pipeline can enter the water storage barrel through a flushing circulating valve, a fourth pipeline is provided with a flushing drain valve, and a fifth pipeline is provided with a micro cross-flow drain valve.

Further, a water purification pressure gauge, a water purification flow transmitter and a water bucket water adding valve are sequentially arranged on the first pipeline from left to right, a water purification drainage pipeline is further arranged between the water purification flow transmitter and the water bucket water adding valve, and a water purification drainage valve is arranged on the water purification drainage pipeline.

Further, a membrane column backwashing device is arranged on the second pipeline; the membrane column backwashing device comprises a backwashing water inlet valve, a membrane column backwashing centrifugal pump and a backwashing pump front valve, wherein a water outlet of the water storage barrel is connected with one end of the backwashing pump front valve through a water barrel water drain valve, the other end of the backwashing pump front valve is connected with one end of the membrane column backwashing centrifugal pump, the other end of the membrane column backwashing centrifugal pump is connected with one end of the backwashing water inlet valve, and the other end of the backwashing water inlet valve is connected to a purified water flow transmitter; the other end of the membrane column backwashing centrifugal pump is also connected with a bucket emptying valve.

Furthermore, one end of the water bucket drain valve is also connected with one end of the conductivity measuring instrument.

Further, a concentrated water pressure gauge and a concentrated water flow transmitter are further arranged on the third pipeline.

Further, a micro cross-flow water discharge regulating valve is further installed on the fifth pipeline, and the micro cross-flow water discharge regulating valve is located at the rear end of the micro cross-flow water discharge valve.

Compared with the prior art, the utility model provides a technical scheme includes following beneficial effect:

on the one hand, the utility model discloses a big flux ceramic membrane for the net water yield is 20 ~ 40 times of current ceramic membrane equipment water purification flow under the condition of same precision and former water flow, and realizable operational mode includes but is not limited to: a ceramic membrane micro cross flow filtration mode, a ceramic membrane dead end filtration mode, a ceramic membrane automatic backwashing mode, a ceramic membrane automatic reinforced backwashing mode, a ceramic membrane automatic positive flushing mode, a ceramic membrane automatic chemical cleaning mode and the like.

On the other hand, the whole system does not adopt the concentrated water reflux, so that the temperature superposition can not be caused, the concentration of the liquid in the original water tank can not be influenced, and the water quality of the produced water can be very stable; for dead-end filtration and micro cross flow filtration, the water production is carried out at the inflow rate of all or more than 90 percent, so that the water production energy consumption of unit volume is reduced, and the influence of the flow rate, temperature, viscosity and the like of the membrane surface on the filtration efficiency is not considered; simultaneously with filtration system positive backwash, strengthen the used water storage bucket of backwash and chemical cleaning and the filter tube of equipment and make an organic whole, the area of ceramic membrane equipment has greatly been saved, and the model size of water storage bucket can be according to equipment operation and the required water yield of membrane column washing and design, and install floater liquid level switch on the water storage bucket, the cask adds the water valve, cask emptying valve and other accessories of adaptation system and membrane column, common water tank has been replaced, required area in the equipment operation process has greatly been reduced, the cost of labor and the operation degree of difficulty, the dependence of equipment operation to the environment has been reduced simultaneously.

Furthermore, the utility model discloses utilize intelligent detection device such as PLC program combination manometer, flow transmitter, floater level switch, conductivity measuring apparatu, the corresponding operation algorithm of cooperation has realized ceramic membrane filtration system's full-automatic nimble control, and automatic multimode water treatment mode adds the parameter variation that PLC transmitted according to each instrument for traditional semi-automatic ceramic membrane filtration system becomes intelligence, nimble. Through the mutual cooperation of dead end filtration and little cross-flow intelligence filtration mode, replaced the circulation treatment mode in the past, avoided the circulation to filter the stained that causes the membrane post when later stage liquid concentration uprises and not in time control when saving filter time, improved the holistic treatment effeciency of system and security.

To sum up, the utility model provides a this kind of collection ceramic membrane is little the cross-flow and is filtered in intelligent filtration system of an organic whole with the dead end, its multi-functional operation mode, membrane post cleaning mode cooperate intelligent man-machine interaction mode homoenergetic effectively to prolong membrane post life again, and the whole or most flow of circulating pump produces the water purification for circulating pump and supporting pipeline, cable, area reduce in a large number, have reduced the investment of equipment.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is the utility model provides a structure schematic diagram of an intelligent filtration system integrating ceramic membrane micro cross flow filtration and dead end filtration.

Wherein: 1. a water inlet preposition valve; 2. a pre-filter; 3. a pre-pump pressure gauge; 4. a water inlet valve of a water inlet pump; 5. a water inlet centrifugal pump; 6. a water inlet pressure gauge; 7. a film changing water drain valve; 8. a membrane column water inlet valve; 9. a ceramic membrane filter; 10. a micro cross flow drain valve; 11. a micro cross flow drainage regulating valve; 12. Flushing a drain valve; 13. a concentrated water pressure gauge; 14. a concentrate flow rate transmitter; 15. a flushing circulation valve; 16. a water purification and drainage valve; 17. a purified water pressure gauge; 18. a purified water flow transmitter; 19. backwashing the water inlet valve; 20. a water bucket water adding valve; 21. a water storage barrel; 22. a float ball liquid level switch; 23. a water discharge valve of the bucket; 24. backwashing a pump front valve; 25. membrane column backwashing centrifugal pump; 26. a bucket emptying valve; 27. A conductivity measuring instrument; 28. a metering dosing device.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of systems consistent with certain aspects of the invention, as detailed in the appended claims.

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention is further described in detail with reference to the accompanying drawings and embodiments.

Example 1

Referring to fig. 1, the utility model provides an intelligent filter system integrating ceramic membrane micro cross flow filtration and dead end filtration, which comprises an original water tank, a water inlet centrifugal pump 5, a ceramic membrane filter 9 and a water storage barrel 21 which are connected in sequence through pipelines, wherein the filter system comprises a cross flow filtration loop, a dead end filtration loop, a positive flushing loop, a backwashing loop, a chemical cleaning loop and a reinforced backwashing loop, and each loop is controlled by a controller to enable the whole filter system to realize a corresponding operation mode; the water storage barrel 21 is provided with a floating ball liquid level switch 22 and is connected with a controller, and the floating ball liquid level switch 22 judges whether to operate a ceramic membrane automatic backwashing mode or a ceramic membrane automatic positive flushing mode according to the water level in the water storage barrel 21; the water storage barrel 21 is further provided with a metering and dosing device 28 and is connected with the controller, the metering and dosing device 28 consists of a metering pump and a medicine storage chamber, and a cleaning agent is added into cleaning water when a ceramic membrane automatic reinforced backwashing mode or a ceramic membrane automatic chemical cleaning mode is adopted.

Further, the ceramic membrane filter 9 comprises at least one ceramic membrane column, and the filtering flow of a single ceramic membrane column is 1.8-4.3 m³The method is characterized in that a plurality of ceramic membrane columns can be connected in parallel in actual use, so that the water purification amount is 20-40 times of that of the original ceramic membrane equipment under the condition of the same precision and the same raw water flow; and for dead-end filtration and micro cross flow, the water production is carried out at the water inlet flow rate of all or more than 90%, so that the water production energy consumption per unit volume is reduced. The influence of the flow rate, temperature, viscosity and the like of the membrane surface on the filtration efficiency is not considered.

Further, the stock solution of the raw water tank sequentially passes through a water inlet preposition valve 1, a preposition filter 2, a pre-pump pressure gauge 3, a water inlet pump water inlet valve 4, a conductivity measuring instrument 27, a water inlet centrifugal pump 5, a water inlet pressure gauge 6 and a membrane column water inlet valve 8 of the ceramic membrane filter to enter a ceramic membrane filter 9; the water purification device is characterized in that a purified water outlet of the ceramic membrane filter 9 is communicated with a water inlet of the water storage barrel 21 through a first pipeline, the purified water outlet of the ceramic membrane filter 9 is further communicated with a water outlet of the water storage barrel 21 through a second pipeline, a concentrated water outlet of the ceramic membrane filter 9 is connected with three pipelines, a third pipeline can enter the water storage barrel 21 through a flushing circulating valve 15, a flushing drain valve 12 is installed on a fourth pipeline, and a micro cross flow drain valve 10 is installed on a fifth pipeline. The system reasonably and flexibly mutually matches the dead-end filtration and micro cross flow intelligent filtration modes, replaces the previous circulation treatment mode, saves the filtration time, avoids fouling to the membrane column when the liquid concentration in the later stage of the circulation filtration is high and is not controlled in time, and improves the overall treatment efficiency and safety of the system.

Further, a purified water pressure gauge 17, a purified water flow transmitter 18 and a water bucket water adding valve 20 are sequentially arranged on the first pipeline from left to right, a purified water drainage pipeline is further arranged between the purified water flow transmitter 18 and the water bucket water adding valve 20, and a purified water drainage valve 16 is arranged on the purified water drainage pipeline.

Further, a membrane column backwashing device is arranged on the second pipeline; the membrane column backwashing device comprises a backwashing water inlet valve 19, a membrane column backwashing centrifugal pump 25 and a backwashing pump front valve 24, wherein a water outlet of the water storage barrel 21 is connected with one end of the backwashing pump front valve 24 through a water barrel water drain valve 23, the other end of the backwashing pump front valve 24 is connected with one end of the membrane column backwashing centrifugal pump 25, the other end of the membrane column backwashing centrifugal pump 25 is connected with one end of the backwashing water inlet valve 19, and the other end of the backwashing water inlet valve 19 is connected to a purified water flow transmitter 18; the other end of the membrane column backwashing centrifugal pump 25 is also connected with a water barrel emptying valve 26.

Therefore, the system integrates the water storage barrel 21 for positive and negative washing, reinforced backwashing and chemical cleaning into a whole and is applied to the filtering system, the type and the size of the water storage barrel 21 can be designed according to the running of the ceramic membrane filter 9 and the water quantity required by membrane column cleaning, and the floating ball liquid level switch 22, the bucket water adding valve 20, the bucket water discharging valve 23 and other accessories adapting to equipment and membrane columns are added on the water storage barrel 21, so that a common water tank is replaced, the occupied area and the labor cost required in the running process of the equipment are greatly reduced, and the operation difficulty and the dependence of the system running on the environment are reduced.

Further, one end of the bucket drain valve 23 is also connected to one end of the conductivity measuring instrument 27.

Further, a concentrated water pressure gauge 13 and a concentrated water flow transmitter 14 are arranged on the third pipeline.

Further, a micro cross flow water discharge regulating valve 11 is further installed on the fifth pipeline, and the micro cross flow water discharge regulating valve 11 is located at the rear end of the micro cross flow water discharge valve 10.

Specifically, the definition or function of each module is as follows: 1. and the water inlet preposed valve is used for isolating the system and prefiltering stock solution. 2. The front filter adopts a precise stainless steel filter screen to prevent larger particles from entering the system. 3. And the pressure gauge in front of the pump is used for detecting whether the water inlet pump pumps negative pressure or not and is additionally provided with a pressure transmitter. 4. And the water inlet valve of the water inlet pump is used for isolating the water inlet pump from other directions of the pipeline. 5. And the water inlet centrifugal pump is used for sucking the pretreated raw water into the system to form a certain pressure. 6. And the water inlet pressure gauge is used for detecting the pressure of raw water before the raw water enters the membrane column and is additionally provided with a pressure transmitter. 7. The membrane changing and water discharging valve is a manual valve used for discharging redundant water in the membrane column when the membrane column is changed or the machine is stopped for a long time. And 8, a membrane column water inlet valve for controlling raw water to enter the membrane column. 9. The ceramic membrane filter can adopt a ceramic membrane column with corresponding precision to carry out water treatment according to the filtration requirement. 10. The micro cross flow drain valve controls the system to perform micro cross flow filtration. 11. The micro cross flow drainage regulating valve can regulate the drainage concentrated water flow rate valve according to the requirement. 12. And the flushing drain valve is used for controlling the discharge system to discharge the cleaning wastewater. 13. And the concentrated water pressure gauge is used for detecting the pressure of the concentrated water discharged after the ceramic membrane is filtered and is provided with a pressure transmitter. 14. And the concentrated water flow transmitter is used for detecting the concentrated water flow discharged after the ceramic membrane filtration. 15. And the flushing circulating valve controls whether the system performs circulating flushing. 16. A water purification and drainage valve; the system produces water purification valve. 17. And the water purification pressure gauge is used for detecting the water purification pressure produced after the ceramic membrane is filtered and is additionally provided with a pressure transmitter. 18. And the purified water flow transmitter is used for detecting the purified water flow discharged after the ceramic membrane filtration. 19. A backwashing water inlet valve and a valve for controlling backwashing water to enter the membrane column. 20. A water adding valve of the water barrel and a valve for controlling the purified water produced by the ceramic membrane to enter the water storage barrel 21. 21. The water storage barrel is a special water barrel for storing water for cleaning equipment, and the water storage amount is not less than the water amount required by cleaning the membrane column once. 22. The float ball liquid level switch can judge whether the equipment is operated to wash according to the water level in the water storage barrel 21. 23. A water drain valve for controlling the cleaning water of the water storage barrel 21 to enter the pipeline. 24. And the backwashing pump front valve is used for isolating the backwashing pump from other directions of the pipeline. 25. The membrane column backwashing centrifugal pump sucks water in the water storage barrel into the system and supplies water with certain pressure. 26. A water barrel emptying valve matched with the membrane column backwashing centrifugal pump 25 to discharge the residual water in the water storage barrel 21. 27. And the conductivity measuring instrument is used for measuring the conductivity of the liquid to be processed by the equipment and automatically selecting a corresponding filtering mode by matching with the PLC. 28. The metering and chemical adding device consists of a metering pump and a chemical storage chamber, and a cleaning agent is added into cleaning water when chemical cleaning and reinforced backwashing are needed.

To sum up, the utility model provides a this kind of collect ceramic membrane little cross-flow filter and dead end filter in intelligent filtration system of an organic whole, the controller adopts Programmable Logic Controller (PLC), and the actual operational mode of entire system includes:

when the water treatment filtration is carried out, two modes are included,

when the raw water concentration is higher (higher than the concentration threshold set in the PLC), the system selects a micro cross flow mode for filtration, and the specific filtration mode is as follows: the ceramic membrane micro cross flow mode valves (a water inlet preposition valve 1, a water inlet pump water inlet valve 4, a membrane column water inlet valve 8, a micro cross flow drain valve 10 and a water purification drain valve 16) are in an open state, and the other valves are in a closed state; and (3) starting the water inlet centrifugal pump 5, and enabling raw water to be treated in the system to enter the ceramic membrane filter 9 through the water inlet preposed valve 1 → the preposed filter 2 → the pressure gauge 3 before the pump → the water inlet valve of the water inlet pump 4 → the water inlet centrifugal pump 5 → the water inlet pressure gauge 6 → the membrane column water inlet valve 8 → the water inlet of the ceramic membrane filter 9. The produced purified water passes through the path: the purified water outlet of the ceramic membrane filter 9 → the purified water pressure gauge 17 → the purified water flow transmitter 18 → the purified water drain valve 16. The discharged concentrated water passes through a path: the concentrated water outlet of the ceramic membrane filter 9 → the concentrated water pressure gauge 13 → the concentrated water flow rate transmitter 14 → the micro cross flow drain valve 10 → the micro cross flow drain regulating valve 11.

Secondly, when the raw water concentration is low (lower than the concentration threshold set in the PLC), the system selects a dead-end mode for filtering, and the specific filtering mode is as follows: the ceramic membrane dead end mode valves (a water inlet preposition valve 1, a water inlet valve 4 of a water inlet pump, a membrane column water inlet valve 8 and a micro cross flow water outlet valve 10) are in an open state, and the other valves are in a closed state; and (3) starting the water inlet centrifugal pump 5, and enabling the raw water to be treated in the system to enter the ceramic membrane filter 9 through the water inlet preposed valve 1 → the preposed filter 2 → the pressure gauge 3 before the pump → the water inlet valve 4 of the water inlet pump → the water inlet centrifugal pump 5 → the water inlet pressure gauge 6 → the membrane column water inlet valve 8 → the water inlet of the ceramic membrane filter 9. The produced purified water passes through the path: the purified water outlet of the ceramic membrane filter 9 → the purified water pressure gauge 17 → the purified water flow transmitter 18 → the purified water drain valve 16. The discharged concentrated water passes through a path: the concentrated water outlet of the ceramic membrane filter 9 → a concentrated water pressure gauge 13 → a concentrated water flow transmitter 14, and the valve at the concentrated water outlet end is closed.

When the ceramic membrane filter is automatically cleaned, four modes are included,

when the system is ready to enter the cleaning mode, if the float level switch 22 in the water storage barrel 21 detects that the liquid level in the barrel does not reach the designated cleaning liquid level, the normal filtering state of the ceramic membrane filter 9 will change: namely, the water purifying and draining valve 16 at the purified water outlet of the ceramic membrane filter 9 is closed, the water adding valve 20 of the water bucket is opened, and the purified water filtered by the ceramic membrane column automatically enters the water storage bucket 21 for cleaning the membrane column; when the liquid level reaches the backwashing water level of the ceramic membrane column, the water inlet centrifugal pump 5 is closed, all valves are closed simultaneously, and the membrane column is directly cleaned when the liquid level meets the cleaning conditions. When the continuous filtration of the system exceeds a certain time or the system detects that the pressure difference (namely the difference between the water inlet pressure gauge 6 and the water purification pressure gauge 17) between the front and the back of the membrane column changes slightly, the system enters a ceramic membrane automatic backwashing mode or a ceramic membrane automatic positive flushing mode.

a) Automatic backwashing mode of ceramic membrane

The ceramic membrane automatic backwashing mode valves (the flushing drain valve 12, the backwashing water inlet valve 19, the bucket water outlet valve 23 and the backwashing pump front valve 24) are in an open state, the other valves are in a closed state, the membrane column backwashing centrifugal pump 25 is opened, and water for cleaning the ceramic membrane column passes through the water storage bucket 21 → the bucket water outlet valve 23 → the backwashing pump front valve 24 → the membrane column backwashing centrifugal pump 25 → the backwashing water inlet valve 19 → the purified water flow transmitter 18 → the purified water pressure gauge 17 → the concentrated water outlet of the ceramic membrane filter 9 → the concentrated water pressure gauge 13 → the concentrated water flowmeter 14 → the flushing drain valve 12 to flow out.

b) Ceramic membrane automatic positive punching mode

The ceramic membrane automatic positive flushing mode valves (the water inlet pump water inlet valve 4, the membrane column water inlet valve 8, the flushing water outlet valve 12 and the bucket water outlet valve 23) are in an open state, the other valves are in a closed state, the water inlet centrifugal pump 5 is opened, and water for cleaning the membrane column flows out through the water storage bucket 21 → the bucket water outlet valve 23 → the water inlet pump water inlet valve 4 → the water inlet centrifugal pump 5 → the water inlet pressure gauge 6 → the membrane column water inlet valve 8 → the concentrated water outlet of the ceramic membrane filter 9 → the concentrated water pressure gauge 13 → the concentrated water flowmeter 14 → the flushing water outlet valve 12.

When the PLC program monitors that the system runs for a long time, the transmembrane pressure difference of the ceramic membrane column of the ceramic membrane filter 9 rises to a large value in a short time, or the water yield of the membrane column drops to a certain amount, and the ideal effect can not be recovered through the automatic backwashing mode or the automatic positive flushing mode of the ceramic membrane of the equipment. PLC can show on the equipment screen through each item parameter contrastive analysis of each pressure transmitter and flow transmitter and remind typeface or prompt tone, selects suitable time to let equipment operation ceramic membrane strengthen backwash mode or ceramic membrane automatic chemical cleaning mode automatically. The two cleaning modes are as follows:

c) ceramic membrane automatic reinforced backwashing mode

The ceramic membrane automatic reinforced backwashing mode valves (a flushing circulating valve 15, a backwashing water inlet valve 19, a water bucket drain valve 23 and a backwashing pump front valve 24) are in an open state, and the rest valves are in a closed state; and (3) opening the membrane column backwashing centrifugal pump 25, adding a quantitative acid-base cleaning agent into the flushing water by using a metering and dosing device 28 of the water storage barrel 21, wherein the water for cleaning the ceramic membrane column passes through the water storage barrel 21 → a water barrel drain valve 23 → a backwashing pump front valve 24 → the membrane column backwashing centrifugal pump 25 → a backwashing water inlet valve 19 → a purified water flow transmitter 18 → a purified water pressure gauge 17 → a concentrated water outlet of the ceramic membrane filter 9 → a concentrated water pressure gauge 13 → a concentrated water flow meter 14 → a flushing circulating valve 15. When the flushing is circulated to a designated time, the flushing circulation valve 15 is automatically closed and the flushing drain valve 12 is opened.

d) Automatic chemical cleaning mode for ceramic membrane

The ceramic membrane automatic chemical cleaning mode valves (the water inlet valve 4 of the water inlet pump, the water inlet valve 8 of the membrane column, the flushing circulating valve 15 and the water drain valve 23 of the bucket) are in an open state, and the rest valves are in a closed state; the equipment water inlet centrifugal pump 5 is started, the metering and dosing device 28 of the water storage barrel 21 is utilized to add quantitative acid-base cleaning agent into the flushing water, and the water for cleaning the ceramic membrane column passes through the water storage barrel 21 → the water barrel water drain valve 23 → the water inlet valve of the water inlet pump 4 → the equipment water inlet centrifugal pump 5 → the water inlet pressure gauge 6 → the water inlet valve of the membrane column 8 → the concentrated water outlet of the ceramic membrane filter 9 → the concentrated water pressure gauge 13 → the concentrated water flowmeter 14 → the flushing circulating valve 15. When the flushing is circulated to the designated time, the flushing circulation valve 15 is closed and the flushing drain valve 12 is opened.

The six operation modes do not represent all the operation modes of the system, only a plurality of common operation states of the system are presented, and a user can adjust the states of all valves according to the needs of the system to realize different functions; the filtration mode, the backwashing mode and the backwashing frequency of the system can be adjusted according to different operation parameters and different water qualities during the operation of the system, and the system is ensured to be at the optimal efficiency point all the time.

The utility model provides a this kind of collection ceramic membrane is little the cross-flow and is filtered and the dead end filters in the intelligent filtration system of an organic whole, adopts big flux ceramic membrane, and realizable operational mode includes but not limited to: a ceramic membrane micro cross flow filtration mode, a ceramic membrane dead end filtration mode, a ceramic membrane automatic backwashing mode and a ceramic membrane automatic reinforced backwashing mode; a ceramic membrane automatic positive punching mode, a ceramic membrane automatic chemical cleaning mode and the like. Meanwhile, the multifunctional intelligent filtration and full-automatic intelligent membrane column cleaning of the ceramic membrane equipment are realized by utilizing a PLC program in combination with intelligent detection devices such as a pressure gauge, a flow transmitter, a floating ball liquid level switch 22, a conductivity measuring instrument 27 and the like and matching with a corresponding operation algorithm. Meanwhile, the forward and reverse washing water storage barrel used in various cleaning modes of the membrane column is integrated with the filtering pipeline of the device, so that the floor area of the ceramic membrane device is greatly saved, and the cleaning efficiency is improved.

The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.

It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. An intelligent filtering system integrating ceramic membrane micro cross flow filtration and dead end filtration, which comprises a raw water tank, a water inlet centrifugal pump (5), a ceramic membrane filter (9) and a water storage barrel (21) which are sequentially connected through a pipeline, and is characterized in that the filtering system comprises a cross flow filtration loop, a dead end filtration loop, a positive flushing loop, a backwashing loop, a chemical cleaning loop and a reinforced backwashing loop, and each loop is controlled by a controller to enable the filtering system to realize a corresponding operation mode; the water storage barrel (21) is provided with a floating ball liquid level switch (22) and a metering and dosing device (28), and the floating ball liquid level switch (22) and the metering and dosing device (28) are respectively connected with a controller.

2. The intelligent filter system integrating ceramic membrane micro cross-flow filtration and dead-end filtration according to claim 1, wherein the ceramic membrane filter (9) comprises at least one ceramic membrane column, and the filtration flow rate of the ceramic membrane column is 1.8-4.3 m³/h。

3. The intelligent filter system integrating ceramic membrane micro cross-flow filtration and dead-end filtration according to claim 1, wherein a stock solution of the raw water tank sequentially passes through a water inlet pre-valve (1), a pre-filter (2), a pre-pump pressure gauge (3), a water inlet pump water inlet valve (4), a conductivity measuring instrument (27), a water inlet centrifugal pump (5), a water inlet pressure gauge (6) and a membrane column water inlet valve (8) and enters the ceramic membrane filter (9); the water purification device is characterized in that a water purification outlet of the ceramic membrane filter (9) is communicated with a water inlet of the water storage barrel (21) through a first pipeline, the water purification outlet of the ceramic membrane filter (9) is communicated with a water outlet of the water storage barrel (21) through a second pipeline, a concentrated water outlet of the ceramic membrane filter (9) is connected with three pipelines, a third pipeline can enter the water storage barrel (21) through a flushing circulating valve (15), a flushing drain valve (12) is installed on a fourth pipeline, and a micro cross flow drain valve (10) is installed on a fifth pipeline.

4. The intelligent filter system integrating ceramic membrane micro cross-flow filtration and dead-end filtration according to claim 3, wherein a purified water pressure gauge (17), a purified water flow transmitter (18) and a water bucket water adding valve (20) are sequentially arranged on the first pipeline from left to right, a purified water drainage pipeline is further arranged between the purified water flow transmitter (18) and the water bucket water adding valve (20), and a purified water drainage valve (16) is arranged on the purified water drainage pipeline.

5. The intelligent filtration system integrating ceramic membrane micro cross-flow filtration and dead-end filtration as claimed in claim 3, wherein a membrane column backwashing device is disposed on the second pipeline; the membrane column backwashing device comprises a backwashing water inlet valve (19), a membrane column backwashing centrifugal pump (25) and a backwashing pump front valve (24), wherein a water outlet of the water storage barrel (21) is connected with one end of the backwashing pump front valve (24) through a water barrel water drain valve (23), the other end of the backwashing pump front valve (24) is connected with one end of the membrane column backwashing centrifugal pump (25), the other end of the membrane column backwashing centrifugal pump (25) is connected with one end of the backwashing water inlet valve (19), and the other end of the backwashing water inlet valve (19) is connected to a purified water flow transmitter (18); the other end of the membrane column backwashing centrifugal pump (25) is also connected with a bucket emptying valve (26).

6. The intelligent filter system integrating ceramic membrane micro cross-flow filtration and dead-end filtration as claimed in claim 5, wherein one end of the water bucket drain valve (23) is further connected to one end of the conductivity measuring instrument (27).

7. The intelligent filtration system integrating ceramic membrane micro cross-flow filtration and dead-end filtration as claimed in claim 3, wherein a concentrate pressure gauge (13) and a concentrate flow transmitter (14) are further disposed on the third pipeline.

8. The intelligent filter system integrating ceramic membrane micro cross-flow filtration and dead-end filtration, according to claim 3, wherein a micro cross-flow drain regulating valve (11) is further installed on the fifth pipeline, and the micro cross-flow drain regulating valve (11) is located at the rear end of the micro cross-flow drain valve (10).