CN117379978B

CN117379978B - Ultrafiltration membrane pool operation method and device, electronic equipment and readable storage medium

Info

Publication number: CN117379978B
Application number: CN202311687761.4A
Authority: CN
Inventors: 张自力; 王泽民; 韩星航; 张娟; 张重阳; 牛豫海; 田志民; 陈司晗; 高妍; 张静
Original assignee: Hebei Xiong'an Ruitian Technology Co ltd; Tangshan Caofeidian Water Supply Co ltd; Hebei Construction & Investment Water Investment Co ltd
Current assignee: Hebei Xiong'an Ruitian Technology Co ltd; Tangshan Caofeidian Water Supply Co ltd; Hebei Construction & Investment Water Investment Co ltd
Priority date: 2023-12-11
Filing date: 2023-12-11
Publication date: 2024-02-23
Anticipated expiration: 2043-12-11
Also published as: CN117379978A

Abstract

The disclosure provides an ultrafiltration membrane pool operation method and device, electronic equipment and readable storage medium, wherein the method comprises the following steps: determining a first operation parameter and a first backwashing time of an ultrafiltration membrane pool according to historical operation data of the ultrafiltration membrane pool; updating the first backwashing time based on the relative relation between the second operation parameter and the first operation parameter and a pre-constructed relation model to obtain a second backwashing time; wherein the second operation parameter is the current operation parameter of the ultrafiltration membrane pool; the relation model is constructed based on the first operation parameter and is used for constructing a relation model between the operation parameter of the ultrafiltration membrane pool and the treated water quantity; the operating parameters include: a transmembrane pressure difference increasing value, a transmembrane pressure difference, water temperature and turbidity; and controlling the queuing backwash of the ultrafiltration membrane pool based on the second backwash time. The method and the device can solve the problem that the operation parameters in the related technology are all fixed parameters and cannot be adjusted according to actual conditions.

Description

Ultrafiltration membrane pool operation method and device, electronic equipment and readable storage medium

Technical Field

The present disclosure relates to water treatment technology, and more particularly, to a method and apparatus for operating an ultrafiltration membrane tank, an electronic device, and a readable storage medium.

Background

With the improvement of water quality standards, ultrafiltration membranes are increasingly applied in the field of water treatment because of being capable of effectively intercepting particulate matters with the particle sizes larger than the aperture of the ultrafiltration membranes in water. The operation parameters such as backwashing time, maintenance cleaning time, chemical cleaning time and the like of the membrane system in the related art are all fixed parameters and cannot be adjusted according to actual conditions, so that the effect of the operation parameters is poor, and the functions of ensuring long-term normal operation of the ultrafiltration membrane and prolonging the service life of the membrane are not achieved.

Disclosure of Invention

The invention aims to provide an ultrafiltration membrane pool operation method and device, electronic equipment and a readable storage medium, so as to solve the problem that operation parameters are fixed parameters and cannot be adjusted according to actual conditions.

In a first aspect of an embodiment of the present disclosure, there is provided an ultrafiltration membrane cell operation method, including:

determining a first operation parameter and a first backwashing time of an ultrafiltration membrane pool according to historical operation data of the ultrafiltration membrane pool;

updating the first backwashing time based on the relative relation between the second operation parameter and the first operation parameter and a pre-constructed relation model to obtain a second backwashing time;

Wherein the second operation parameter is the current operation parameter of the ultrafiltration membrane pool; the relation model is constructed based on the first operation parameter and is used for constructing a relation model between the operation parameter of the ultrafiltration membrane pool and the treated water quantity; the operating parameters include: the transmembrane pressure difference increases value, the treated water amount, transmembrane pressure difference, water temperature and turbidity;

and controlling the queuing backwash of the ultrafiltration membrane pool based on the second backwash time.

In a second aspect of the embodiments of the present disclosure, there is provided an ultrafiltration membrane cell operation apparatus, comprising:

the first backwashing time determining module is used for determining a first operation parameter and a first backwashing time of the ultrafiltration membrane pool according to historical operation data of the ultrafiltration membrane pool;

the second backwashing time determining module is used for updating the first backwashing time based on the relative relation between the second operation parameter and the first operation parameter and a pre-constructed relation model to obtain second backwashing time; wherein the second operation parameter is the current operation parameter of the ultrafiltration membrane pool; the relation model is constructed based on the first operation parameter and is used for constructing a relation model between the operation parameter of the ultrafiltration membrane pool and the treated water quantity; the operating parameters include: a transmembrane pressure difference increasing value, a transmembrane pressure difference, water temperature and turbidity;

And the backwashing control module is used for controlling queuing backwashing of the ultrafiltration membrane pool based on the second backwashing time.

In a third aspect of the disclosed embodiments, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the steps of the ultrafiltration membrane pool operation method described above are implemented when the processor executes the computer program.

In a fourth aspect of the disclosed embodiments, there is provided a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the ultrafiltration membrane pool operation method described above.

The ultrafiltration membrane pool operation method and device, the electronic equipment and the readable storage medium provided by the embodiment of the disclosure have the beneficial effects that:

according to the method and the device for controlling the queuing backwash of the ultrafiltration membrane pool, the first operation parameters and the first backwash time are determined according to historical operation data of the ultrafiltration membrane pool, the first backwash time is updated based on a pre-constructed relation model, the second backwash time is obtained, meanwhile, queuing backwash of the ultrafiltration membrane pool is controlled based on the second backwash time, automatic operation of the ultrafiltration membrane pool is achieved, and the problem that operation parameters in the related art are all fixed parameters and cannot be adjusted according to actual conditions is solved. Meanwhile, when the water quantity load of the ultrafiltration membrane pool is changed greatly, seasons are different and the turbidity of incoming water is changed, the first backwashing time can be updated according to the pre-constructed relation model to obtain the second backwashing time, so that the second backwashing time is more scientific and reasonable, long-term normal operation of the ultrafiltration membrane pool is ensured, and the service life of the membrane is effectively prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are required for the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic flow chart of an ultrafiltration membrane pool operation method according to an embodiment of the present disclosure;

FIG. 2 is a flow chart of an operation process of an ultrafiltration membrane tank provided in an embodiment of the present disclosure;

FIG. 3 is a graph of membrane flux versus operating time for different transmembrane pressure differences provided by an embodiment of the present disclosure;

FIG. 4 is a graph showing the relationship between transmembrane pressure difference and membrane flux under a standard condition according to an embodiment of the present disclosure;

FIG. 5 is a flow chart of a model of the relationship between transmembrane pressure difference and treated water under a standard condition according to one embodiment of the present disclosure;

FIG. 6 is a graph of membrane flux versus operating time for different turbidity provided by an embodiment of the present disclosure;

FIG. 7 is a graph of turbidity versus membrane flux for a standard condition provided by an embodiment of the present disclosure;

FIG. 8 is a flow chart of a model of the effect of turbidity on the amount of treated water at standard conditions provided by an embodiment of the present disclosure;

FIG. 9 is a graph of membrane flux versus operating time for different water temperatures provided by an embodiment of the present disclosure;

FIG. 10 is a graph of water temperature versus membrane flux for a standard condition provided by an embodiment of the present disclosure;

FIG. 11 is a flow chart of a model of the water temperature effect on the amount of treated water at a standard condition provided by an embodiment of the present disclosure;

FIG. 12 is a graphical representation of membrane cell maintenance cleaning and transmembrane pressure differential provided in accordance with one embodiment of the present disclosure;

FIG. 13 is a graph of the maximum transmembrane pressure difference for each water plant operation time provided in one embodiment of the present disclosure;

FIG. 14 is a flow diagram of a water plant operating system provided in an embodiment of the present disclosure;

FIG. 15 is a block diagram of an ultrafiltration membrane pool operating apparatus provided in an embodiment of the present disclosure;

FIG. 16 is a schematic block diagram of an electronic device provided by an embodiment of the present disclosure;

in the figure:

1-basic transmembrane pressure difference U, 2-transmembrane pressure difference increase value delta h.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the disclosed embodiments. However, it will be apparent to one skilled in the art that the present disclosure may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present disclosure with unnecessary detail.

For the purposes of promoting an understanding of the principles and advantages of the disclosure, reference will now be made to the embodiments illustrated in the drawings.

Referring to fig. 1, fig. 1 is a flow chart of an ultrafiltration membrane pool operation method according to an embodiment of the disclosure, the method includes:

s101: and determining a first operation parameter and a first backwashing time of the ultrafiltration membrane pool according to the historical operation data of the ultrafiltration membrane pool.

In this embodiment, the first operation parameter refers to an operation parameter of the ultrafiltration membrane pool in a standard state, the first backwash time refers to a backwash time of the ultrafiltration membrane pool in the standard state, the historical operation data refers to data collection and research units in a single membrane pool of the ultrafiltration membrane pool, each backwash period is a set of data, the operation historical data corresponding to the same time node can be obtained, and the data sampling frequency can be 1 time per minute. The operational history data may include feed turbidity, water temperature, treated water volume (cumulative, preferably measured separately), transmembrane pressure differential (or membrane cell water in and out level) at various time points of each backwash cycle. The embodiment can determine the first operation parameter and the first backwashing time according to the historical operation data in a big data analysis mode.

S102: updating the first backwashing time based on the relative relation between the second operation parameter and the first operation parameter and a pre-constructed relation model to obtain the second backwashing time. Wherein the second operation parameter is the current operation parameter of the ultrafiltration membrane pool. The relation model is a relation model between the operation parameters of the ultrafiltration membrane pool constructed based on the first operation parameters and the treated water amount. The operating parameters include: the transmembrane pressure difference increases, the transmembrane pressure difference, the water temperature and the turbidity.

The second operating parameter in this example refers to the operating parameter of the ultrafiltration membrane cell in actual production. When the water quantity load of the ultrafiltration membrane tank is changed greatly, seasons are different and the turbidity of incoming water is changed, the first backwashing time is updated based on the relative relation between the second operation parameter and the first operation parameter and the pre-constructed relation model, so that the second backwashing time is obtained, the automatic adjustment of the backwashing time of the ultrafiltration membrane tank is realized, the backwashing time of the ultrafiltration membrane tank is more scientific and reasonable, the long-term normal operation of the ultrafiltration membrane is ensured, and the service life of the membrane is effectively prolonged.

S103: and controlling the queuing backwash of the ultrafiltration membrane pool based on the second backwash time.

According to the embodiment, the queuing backwash of the ultrafiltration membrane pool is controlled based on the second backwash time, and the whole process does not need staff to participate, so that the automatic operation of the ultrafiltration membrane pool is realized. Meanwhile, the second backwashing time is obtained by updating the first backwashing time according to a pre-constructed relation model, so that the operation of the ultrafiltration membrane pool is more accurate, and the automation and intelligent operation of the ultrafiltration membrane pool are realized.

From the above, it can be derived that, according to the embodiment of the disclosure, the first operation parameter and the first backwash time are determined according to the historical operation data of the ultrafiltration membrane pool, the first backwash time is updated based on the pre-constructed relation model, so as to obtain the second backwash time, and meanwhile, the queuing backwash of the ultrafiltration membrane pool is controlled based on the second backwash time, so that the automatic operation of the ultrafiltration membrane pool is realized, the whole process does not need the participation of staff, and the problem that the experience of the staff is relied on in the related art is solved. Meanwhile, when the water quantity load of the ultrafiltration membrane pool is changed greatly, seasons are different and the turbidity of incoming water is changed, the first backwashing time can be updated according to the pre-constructed relation model to obtain the second backwashing time, so that the second backwashing time is more scientific and reasonable, long-term normal operation of the ultrafiltration membrane pool is ensured, and the service life of the membrane is effectively prolonged.

In one embodiment of the present disclosure, the first operating parameters include a target transmembrane pressure differential increase value, a first treated water amount, a first transmembrane pressure differential, a first water temperature and a first turbidity, determining a first operating parameter and a first backwash time of the ultrafiltration membrane tank from historical operating data of the ultrafiltration membrane tank, comprising:

And calculating and adopting the operation cost corresponding to different transmembrane pressure difference increment values according to the historical operation data of the ultrafiltration membrane pool to obtain a target transmembrane pressure difference increment value.

The first backwash time is determined based on the target transmembrane pressure differential increase value.

And setting a first treated water amount, a first transmembrane pressure difference, a first water temperature and a first turbidity according to the historical operation data of the ultrafiltration membrane pool.

The first operation parameter in the embodiment refers to an operation parameter of the ultrafiltration membrane pool in a standard state, and the operation cost refers to an operation cost of the ultrafiltration membrane pool, including a fixed cost and a variable cost, wherein the fixed cost mainly depends on the treated water quantity in the standard state and the designed inflow water quality (long and short flow), and is a fixed value for an established water plant; the variable cost mainly depends on the transmembrane pressure difference increasing value adopted in the operation process of the ultrafiltration membrane pool, different transmembrane pressure difference increasing values are adopted, the corresponding different water volumes for each backwashing treatment can be converted into the interval time of each backwashing of the membrane, the backwashing cost is high when the backwashing is frequent, but the chemical cleaning and maintenance cleaning costs are lower, and vice versa; the influence of water temperatures in different seasons and the difference of water treatment quantity are comprehensively considered, and the running cost is calculated by taking the year as a unit. According to the embodiment, the total membrane washing cost per year can be obtained by comparing water, electricity and medicament consumed by backwashing, maintainability washing and chemical washing of the ultrafiltration membrane pool corresponding to different transmembrane pressure difference increasing values, and the cost economizer is taken as a reasonable transmembrane pressure difference increasing value, namely a target transmembrane pressure difference increasing value by combining the loss and depreciation cost of the membrane.

According to the method, the first backwashing time can be determined based on the target transmembrane pressure difference increasing value in a big data analysis mode, the first treated water quantity, the first transmembrane pressure difference, the first water temperature and the first turbidity are set according to historical data, the first operation parameters can be set according to different states of different water plants, and the accuracy of the first operation parameters is guaranteed.

In one embodiment of the present disclosure, the pre-constructed relationship model includes:

mathematical model of water treatment and transmembrane pressure difference, mathematical model of water treatment and water temperature, and mathematical model of water treatment and turbidity.

The step of constructing a relationship model in this embodiment includes: 1. and establishing three databases of different transmembrane pressure differences, different water temperatures and different turbidity under the standard state according to the collected historical data. 2. And constructing a mathematical model of the treated water quantity and the transmembrane pressure difference, a mathematical model of the treated water quantity and the water temperature and a mathematical model of the treated water quantity and the turbidity according to the three databases. Wherein the step of constructing the mathematical model may be accomplished by way of big data analysis to form and modify the mathematical model. The mathematical model of the embodiment can be automatically generated without participation of staff, and time cost and personnel cost can be saved.

In one embodiment of the disclosure, the second operation parameters include a second treated water amount, a second turbidity, a second water temperature, and a second transmembrane pressure difference, the first operation parameters include a first treated water amount, the first backwash time is updated based on a relative relationship between the second operation parameters and the first operation parameters and a pre-constructed relationship model, and the second backwash time is obtained, including:

obtaining a second treated water amount according to a second operation parameter and a pre-constructed relation model;

calculating a second backwashing time according to the first formula, the second treated water amount, the first treated water amount and the first backwashing time;

the first formula is:

wherein,for the second backwash time,/->For the first backwash time,/->For the second treatment water quantity, +.>Is the first treated water amount.

In this embodiment, obtaining the second treated water volume according to the second operation parameter and the pre-constructed relation model refers to sending the second turbidity, the second water temperature, and the second transmembrane pressure difference into the pre-constructed mathematical model of the treated water volume and the transmembrane pressure difference, the mathematical model of the treated water volume and the water temperature, and the mathematical model of the treated water volume and the turbidity, and calculating to obtain the second treated water volume. According to the embodiment, the second treatment water quantity is obtained according to the preset mathematical model, and the second backwashing time is obtained according to the first formula, so that the second backwashing time is more accurate, and human errors are avoided.

In one embodiment of the present disclosure, the ultrafiltration membrane cell operation method further comprises:

and obtaining the basic transmembrane pressure difference increase rate according to the historical operation data of the ultrafiltration membrane pool.

Chemical cleaning time is determined based on the base transmembrane pressure differential increase rate.

And carrying out chemical cleaning on the ultrafiltration membrane pool according to the chemical cleaning time.

In this embodiment, the basic transmembrane pressure difference refers to the transmembrane pressure difference at the beginning of the backwash cycle, the transmembrane pressure difference increasing value refers to the difference between the transmembrane pressure difference corresponding to different accumulated flow points and the basic transmembrane pressure difference thereof, the basic transmembrane pressure difference increasing value refers to the basic transmembrane pressure difference between two backwash cycles, and the value of the basic transmembrane pressure difference increasing value is very small, and the value is obtained by averaging after accumulating a plurality of backwash cycles. The basic transmembrane pressure difference increasing rate is calculated by a basic transmembrane pressure difference increasing value.

Chemical cleaning refers to cleaning of the membrane group by adding chemical agents (typically citric acid, caustic soda, etc.), and the transmembrane pressure difference can be recovered by chemical cleaning. When the transmembrane pressure difference of the basic transmembrane pressure is higher after multiple maintainability cleaning, chemical cleaning can be performed, the performance recovery of the ultrafiltration membrane is obvious by the chemical cleaning, but the influence on the body of the ultrafiltration membrane is larger. According to the embodiment, the chemical cleaning time is determined according to the basic transmembrane pressure difference increasing rate, so that the ultrafiltration membrane tank is chemically cleaned, and the automatic operation of the ultrafiltration membrane tank is realized.

In one embodiment of the present disclosure, determining a chemical cleaning time based on a base transmembrane pressure differential increase rate includes:

calculating the time required for the transmembrane pressure difference to reach a preset value according to the basic transmembrane pressure difference increase rate; wherein the preset value is a maximum transmembrane pressure difference allowable value.

The time required for the transmembrane pressure difference to reach the preset value is determined as chemical cleaning time.

In this embodiment, the base transmembrane pressure differential growth rate is:

wherein,based on the transmembrane pressure difference increase rate, +.>Is the basic transmembrane pressure difference increasing value, +.>Is a chemical cleaning cycle. According to the basic transmembrane pressure difference increasing rate, the time required for the transmembrane pressure difference to reach the maximum transmembrane pressure difference allowable value under the transmembrane pressure difference increasing value of the membrane system is calculated, namely the chemical cleaning time required under different transmembrane pressure difference increasing values.

In one embodiment of the present disclosure, the ultrafiltration membrane cell operation method further comprises: and if the backwashing frequency of the ultrafiltration membrane pool exceeds the preset backwashing frequency, carrying out maintenance cleaning on the ultrafiltration membrane pool.

In this embodiment, the maintenance cleaning means that the membrane group cleaning is performed by adding a maintenance agent (typically sodium hypochlorite), and the transmembrane pressure difference can be recovered by the maintenance cleaning. When the basic transmembrane pressure difference is higher after backwashing for many times, maintenance cleaning is carried out, and the basic transmembrane pressure difference is gradually increased along with the increase of the maintenance cleaning times. The embodiment can set preset backwashing times according to historical data, and ensure the normal operation of the ultrafiltration membrane pool.

In one embodiment of the present disclosure, the step of collecting historical operating data for the ultrafiltration membrane pool comprises:

for different ultrafiltration process water plants, operational record data for all years are collected and stored.

And taking a single membrane pool of the ultrafiltration membrane system as a data acquisition and research unit, wherein each backwashing period is a group of data corresponding to the operation history data of the same time node.

The specific data comprise: the water inlet turbidity, water temperature, water inlet flow (accumulated value, preferably measured separately), and transmembrane pressure difference (or membrane pool water inlet and outlet level) at each time point of each backwashing period.

Data frequency: every 1 minute.

Setting a reference operating parameter, e.g. setting a reference intake turbidity N ₀ (0.4+ -0.05 NTU) reference water temperature t ₀ (18.+ -. 0.5 ℃ C.) reference membrane flux L ₀ （20±0.5 m ³ /h/m ² ) Reference transmembrane pressure difference increase value delta h ₀ (8.+ -. 0.5 kPa). Taking the same membrane pool and each backwashing period as a group of data, respectively establishing:

(1) Reference intake turbidity N ₀ Water temperature t ₀ The membrane systems of different transmembrane pressure differences run a database.

(2) Reference water inlet temperature t ₀ Transmembrane pressure difference Δh ₀ The membrane systems of different turbidity were run in a database.

(3) Reference intake turbidity N ₀ Transmembrane pressure difference Δh ₀ And (3) running a database by using membrane systems with different water temperatures.

The relevant instrument should be calibrated, and the following operation data meeting the conditions is periodically imported into 3 databases.

In one embodiment of the present disclosure, the ultrafiltration membrane cell operation method further comprises: and preprocessing the historical operation data of the ultrafiltration membrane pool.

The pretreatment comprises the following steps: and (5) processing the water treatment amount, and calculating a transmembrane pressure difference increasing value and a basic transmembrane pressure difference increasing value.

In this embodiment, the preprocessing specifically includes: 1. and respectively deriving the data such as water inflow (accumulated value), water temperature, turbidity, transmembrane pressure difference and the like corresponding to each time point of each group of data (single membrane tank and one backwashing period) of the 3 databases. 2. And setting the treated water volume to zero by taking the starting time of the backwashing period as a starting point, subtracting the accumulated value of the inflow water flow to calculate the treated water volume, and carrying out flow distribution calculation without an independent flowmeter. 3. Recording basic transmembrane pressure difference at the beginning of a backwashing period, and obtaining the difference value between the transmembrane pressure difference corresponding to different accumulated flow points and the basic transmembrane pressure difference, namely the transmembrane pressure difference increasing value. Recording the basic transmembrane pressure difference at the beginning of the next backwashing period, wherein the basic transmembrane pressure difference between the two backwashing periods is taken as a basic transmembrane pressure difference increasing value, and the basic transmembrane pressure difference increasing value is obtained by accumulating and averaging a plurality of backwashing periods in view of the fact that the basic transmembrane pressure difference increasing value is very small.

In one embodiment of the present disclosure, the influencing factors that determine the transmembrane pressure difference are: treated water quantity, membrane flux, water inlet turbidity and water temperature.

In this example, the main sign of membrane fouling is an increase in transmembrane pressure difference, various influencing factors of membrane fouling (transmembrane pressure difference) are analyzed and found, and the following several indexes are determined as main influencing factors:

(1) Water treatment amount: the transmembrane pressure difference increases with the amount of water treated by membrane filtration.

(2) Membrane flux: membrane pollution may vary with membrane flux in a standard state, and there is a theory of low flux zero pollution of ultrafiltration membranes.

(3) Turbidity of the incoming water: the high turbidity of the inlet water can cause rapid increase of the transmembrane pressure difference, and the ultrashort flow needs to be treated by another theory; the sludge produced by high turbidity of the inlet water is large, and the sludge discharge amount needs to be increased, namely the interval of emptying and sludge discharge is reduced.

(4) Water temperature (season): different water temperatures and different viscosities of water may affect the change in the transmembrane pressure difference.

In one embodiment of the present disclosure, the ultrafiltration membrane cell operates as follows:

based on the working principle of ultrafiltration membrane filtration, the operation process of ultrafiltration membrane filtration is different in size, as shown in fig. 2. Generally, the operation parameters of backwashing, emptying and sludge discharging, maintenance cleaning and chemical cleaning are slightly different according to the difference of the turbidity of water entering a membrane tank and the flux of the membrane.

(1) Ultrafiltration membrane filtration: the ultrafiltration membrane group can filter flocculated or precipitated water for about 120 minutes, pollutants are continuously accumulated inside and outside the membrane in the filtering process, so that the membrane flux is reduced, the transmembrane pressure difference is increased, the transmembrane pressure difference is the most direct index of the pollution condition of the reaction membrane, and different cleaning methods are needed according to the severity of the membrane pollution under the condition that the membrane flux can not meet the water production requirement.

(2) Membrane back flushing: backwash is the most common membrane cleaning method, which is a physical rinsing process that removes most contaminants attached to the membrane surface and restores the transmembrane pressure differential without the addition of chemicals. The backwash time may be 10 minutes.

(3) And (5) emptying the membrane pool: and accumulating a certain number of backwashing, and discharging the sludge in the membrane tank, for example, after 10 backwashing, discharging the sludge in the membrane tank.

(4) Maintenance cleaning: the maintenance cleaning is performed after the emptying is performed about a certain number of times, for example, the maintenance cleaning is performed after the emptying is performed 16 times, and the maintenance cleaning is performed for maintaining the performance of the ultrafiltration membrane. Because backwashing cannot remove some contaminants attached to the inside, maintenance cleaning is required, and the process is a chemical cleaning process, and the contaminants on the surface of the ultrafiltration membrane are removed by using a chemical agent soaking mode. The maintenance cleaning system is usually composed of a sodium hypochlorite metering pump and a medicine storage box. And injecting the raw liquid of the medicine into the backwash water to be mixed with the raw liquid of the medicine through a metering pump, and then soaking the ultrafiltration membrane.

(5) Restorative cleaning: restorative cleaning is also called chemical cleaning, and as maintenance cleaning also has some methods of failing to remove pollutants, when the membrane flux is reduced to a certain extent or the transmembrane pressure difference reaches a certain limit, and maintenance cleaning cannot be restored, the pollutants need to be removed by adopting a restorative chemical cleaning mode. The restorative cleaning can be performed by adopting NaOH and sodium hypochlorite to perform alkaline cleaning for 24 hours, then HCl and citric acid are used for performing acid cleaning for 48 hours, aeration is carried out continuously during the period, and the basic transmembrane pressure difference can be basically restored to the initial value after the cleaning.

In one embodiment of the disclosure, based on the impact of membrane fouling on ultrafiltration membrane filtration performance, membrane fouling is classified as follows:

(1) Basic transmembrane pressure difference: the liquid level difference between the inlet water and the outlet water of the membrane group before the ultrafiltration membrane is filtered after the ultrafiltration membrane is cleaned is shown as KPa. The basic transmembrane pressure difference gradually increases with the increase of the backwashing and maintenance cleaning times of the ultrafiltration membrane.

(2) Backwash can restore transmembrane pressure differential: refers to the transmembrane pressure difference that can be recovered by backwashing the membrane group without adding a medicament. As the number of backwash increases, the base transmembrane pressure differential gradually increases.

(3) Maintenance cleaning can restore transmembrane pressure differences: refers to a pressure differential across the membrane that is recoverable by the addition of a maintenance agent (typically sodium hypochlorite) to the membrane module for cleaning. When the basic transmembrane pressure difference is higher after backwashing for many times, maintenance cleaning is carried out, and the basic transmembrane pressure difference is gradually increased along with the increase of the maintenance cleaning times.

(4) Chemical cleaning can restore transmembrane pressure differences: refers to a pressure differential across the membrane that is recoverable by the addition of a chemical agent (typically citric acid, caustic, etc.) for membrane group cleaning. When the pressure difference of the basic transmembrane pressure is higher after multiple maintainability cleaning, chemical cleaning is carried out, the performance recovery of the ultrafiltration membrane is obvious due to the chemical cleaning, but the body of the ultrafiltration membrane is greatly influenced.

In one embodiment of the disclosure, the overall idea of achieving intelligent operation of an ultrafiltration membrane pool is:

(1) Based on the operation process of ultrafiltration membrane filtration, the core of ultrafiltration membrane filtration operation mainly lies in how long the operation of membrane filtration needs to carry out the backwash, and afterwards the backwash time of membrane, many times backwash carry out the evacuation of membrane pond, many times evacuation carry out maintainability washing, many times maintainability washing carry out chemical cleaning etc. generally membrane filtration need carry out backwash, maintainability washing, chemical cleaning's time, mainly depends on the pollution degree of membrane.

(2) Based on the classification and recovery principle of membrane pollution, the transmembrane pressure difference is used as a marker index of membrane pollution, but as the basic transmembrane pressure difference is continuously changed along with the membrane running time and the cleaning state, the water rise ship height of the transmembrane pressure difference is caused, and the embodiment introduces the concepts of the transmembrane pressure difference increasing value and the basic transmembrane pressure difference increasing rate, so that the actual condition of membrane pollution in a backwashing period and the accumulation process of membrane pollution which can be recovered by maintainability cleaning can be better reflected, and the big data analysis mathematical model of a membrane system is simplified.

(3) The final objective achieved by the embodiment is to achieve intelligent automatic operation of the membrane system, and for the operation process of a certain water plant, historical data such as the turbidity of water inlet of a membrane pool, the temperature, the membrane flux, the treated water quantity and the like are adopted for carrying out big data analysis. The present embodiment can build: a relation model of the treated water quantity and the water temperature, a relation model of the treated water quantity and the turbidity, a relation model of the treated water quantity and the membrane flux, and the like.

(4) The core of the embodiment is how to obtain reasonable membrane tank backwashing, maintenance cleaning and chemical cleaning time, wherein the membrane tank backwashing time can correspond to the treated water amount and is embodied through membrane flux. And (3) researching the relation between the membrane flux and related operation parameters in the membrane operation process, and comparing the operation cost adopting different transmembrane pressure difference increment values through analyzing operation big data in the allowable maximum transmembrane pressure difference increment value range.

(5) The backwashing cost is high by adopting a low transmembrane pressure difference increment value, the maintenance cleaning cost and the chemical cleaning cost are low, and vice versa. And analyzing the cost of adopting different transmembrane pressure difference increasing values, so that the transmembrane pressure difference increasing value with reasonable operation of the membrane tank is obtained. And comparing water, electricity and medicament consumed by backwashing, maintainability cleaning and chemical cleaning of the membrane tanks corresponding to different transmembrane pressure difference increasing values to obtain the total annual membrane cleaning cost, and combining the membrane loss and depreciation cost, wherein a cost economizer is a reasonable transmembrane pressure difference increasing value.

(6) And setting system operation parameters based on the obtained reasonable transmembrane pressure difference increment value, determining the backwashing time of the membrane tank in a standard state, calculating the influence of different parameters on the membrane flux through a relation model of the membrane flux, the transmembrane pressure difference, the water temperature and the turbidity, and calculating the corresponding backwashing time. The turbidity reduction, the water temperature increase and the transmembrane pressure difference increase can all enable the membrane flux to be improved, the backwashing time is correspondingly prolonged, the backwashing time in the actual production is increased in the same proportion with the membrane flux based on the linear relation between the membrane flux and the backwashing time, the backwashing time in the standard state is used as a reference, the calculation result is pushed to the system to carry out queuing backwashing of the membrane tank, and the emptying frequency of the membrane tank is adjusted according to the turbidity of the inflow water, so that the intelligent operation of the membrane tank is achieved.

(7) The increase of the basic transmembrane pressure difference is the basis of chemical cleaning of the membrane tank, the annual average basic transmembrane pressure difference increase rate of the membrane tank is obtained through big data analysis, and the chemical cleaning of the ultrafiltration membrane is carried out after the basic transmembrane pressure difference reaches the numerical value required by manufacturers.

In a specific embodiment of the disclosure, the parameter determining process in the intelligent operation process of the ultrafiltration membrane pool is as follows:

(1) Determining primary influencing parameters of membrane system operation

Water inflow Q, unit m ³ /h

Treated water amount W, unit m ³ (each Membrane cell)

Turbidity N of water inlet, unit NTU

The water temperature T is in DEG C

Membrane flux L, unit m ³ /h/m ²

Transmembrane pressure difference h, unit kPa

Transmembrane pressure difference increment delta h, unit kPa

Rate of increase v of pressure difference across membrane, unit kPa/km ³

Basic transmembrane pressure difference U, unit kPa

Basic transmembrane pressure difference increment value delta U, unit kPa

Basic transmembrane pressure difference increasing rate u, unit kPa/km ³

Effective membrane area S, m of membrane pool ²

Membrane tank backwash recovery run time t, min

(2) Membrane flux and related influencing factor relation:

wherein L is membrane flux,() For the calculation function, N is the turbidity of the incoming water, T is the water temperature, +.>Is the value of the transmembrane pressure difference.

(3) Standard operating State setting

For different water plants, different standard running states are set, for example:

Turbidity N of water inlet ₀ =0.4 NTU

Water temperature T ₀ =18℃

Membrane flux L ₀ ，18m ³ /h/m ²

Transmembrane pressure difference increase value delta h ₀ =8kPa

Membrane tank standard backwash period duration t ₀ =120min

(4) The water temperature and the turbidity of the inlet water are locked as standard values, and the membrane flux under different transmembrane pressure difference increasing values delta h is obtained:

wherein,for the membrane flux calculated according to the transmembrane pressure difference increment value in actual production, < >>For slope, +>For intercept, t is time.

Summing the Δh at a plurality of L to obtain

During the standard backwashing period time t ₀ Next, obtain

Wherein,for slope, +>Is the intercept.

The membrane flux is improved, the backwashing time is prolonged correspondingly, based on the linear relation between the membrane flux and the backwashing time, the backwashing time in the standard state is used as the reference, the backwashing time and the membrane flux are improved in the same proportion, and the adjustment value of the backwashing time is calculated according to the deviation value of the membrane flux in actual production and the membrane flux in the standard state:

wherein,t for the adjusted backwash time ₀ Is backwash time in standard state, +.>Is membrane flux in standard state.

(5) Locking the water temperature and the transmembrane pressure difference increase value as standard values to obtain the membrane flux under different water inlet turbidity:

wherein L is ₂ Is based on the turbidity meter of the inlet water in actual productionThe calculated membrane flux was calculated to be,for slope, +>For intercept, t is time.

Summarizing the membrane flux under the turbidity of a plurality of inflows to obtain

During the standard backwashing period time t ₀ Next, obtain

Wherein,for slope, +>Is the intercept.

According to L ₂ And L is equal to ₀ Calculating the adjustment value of t

Wherein t is ₂ To adjust the backwash time.

(6) Locking the turbidity N of the inlet water and the transmembrane pressure difference increase value delta h as standard values to obtain the membrane flux at different water temperatures T:

wherein L is ₃ Is calculated according to the water temperature in actual production.

Summing up L under a plurality of T to obtain

During the standard backwashing period time t ₀ Next, obtain

According to L ₃ And L is equal to ₀ Calculating the adjustment value of t

Wherein t is ₃ To adjust the backwash time.

(7) Average transmembrane pressure differential increase value for n maintenance wash cycles:

wherein Δh ₀ To average the increase in transmembrane pressure difference,for the transmembrane pressure difference increasing value, n is the number of maintenance cleaning periods. The increase in transmembrane pressure differential determines the maintenance cleaning time of the membrane cell.

(8) Rate of increase v of transmembrane pressure difference

Wherein,is time. The rate of increase of the transmembrane pressure difference reflects the performance of the membrane system.

(9) Basic transmembrane pressure differential increase rate u

Wherein,is the basic transmembrane pressure difference increasing value. The basic transmembrane pressure difference increase value determines the chemical cleaning period of the membrane tank; the basic transmembrane pressure differential increase rate is also a manifestation of the membrane system performance.

In a specific embodiment of the present disclosure, the operation parameters are calculated as follows:

1. and constructing a mathematical model of the treated water amount and the transmembrane pressure difference and adjusting the backwashing time.

(1) At the same membrane tank reference water temperature (18 ℃) and reference turbidity (0.4 NTU), the time points and the membrane flux data corresponding to different transmembrane pressure differences of 6, 7, 8, 9 and 10 … … kPa each backwashing period are grouped.

(2) And obtaining an operation time point and membrane flux scatter diagram and a fitting curve of each group of data under different transmembrane pressure differences.

(3) Obtaining a relation between membrane flux and running time under different turbidity:

transmembrane pressure difference 6: l= -0.00178t+15.463

Transmembrane pressure difference 7: l= -0.005826t+19.219

Transmembrane pressure difference 8: l= -0.00780t+21.70

Transmembrane pressure difference 9: l=0.00130lt+22.115

Transmembrane pressure difference 10: l=0.006753t+22.582

Transmembrane pressure difference 11: l=0.009293t+24.79

(4) Membrane flux versus run time fit curves for different transmembrane pressure differences 6, 7, 8, 9, 10kPa were integrated on the same graph as shown in figure 3.

(5) During the standard backwashing period time t ₀ At =120 min, the membrane flux L corresponding to the different transmembrane pressure differences Δh is summed up ₁ Obtaining a relation model of membrane flux and water temperature:

the membrane flux versus transmembrane pressure differential curve under standard conditions is shown in figure 4.

(6) Compared with t at the average delta h of the period ₀ The corresponding backwash cycle should be adjusted to:

for example: membrane tank standard backwash period duration t ₀ =120 min, the average transmembrane pressure difference increase Δh in the backwash cycle ₀ =10 kPa, and the formula is taken to be:

L ₁ =23.99 m ³ /h/m ²

=96min

(7) In the standard state, the program of the relation model of the influence of the transmembrane pressure difference on the treated water amount is shown in fig. 5.

2. Constructing mathematical model of treated water quantity and turbidity and adjusting backwashing time

(1) And grouping the time points and the membrane flux data corresponding to each backwashing period of different turbidity values of 0.4, 0.5 and 0.6 … … NTU under the condition of the same membrane tank reference water temperature (18 ℃) and reference transmembrane pressure difference (8 kPa).

(2) And obtaining a running time point and membrane flux scatter diagram and a fitting curve of each group of data under different turbidity.

turbidity 0.4: l= -0.00780t+21.7

Turbidity 0.5: l= -0.009263t+21.957

Turbidity 0.6: l= -0.002746t+21.101

Turbidity 0.7: l= -0.002223t+20.393

Turbidity 0.8: l= -0.01435t+20.784

Turbidity 0.9: l= -0.02057t+20.208

Turbidity 1.0: l= -0.004760t+19.14

Turbidity 1.1: l= -0.0135t+19.085

(4) Membrane flux at different turbidity 0.4, 0.5, 0.6 … … NTU was integrated on the same graph with the run time fit curve as shown in fig. 6.

(5) During the standard backwashing period time t ₀ At=120 min, the membrane fluxes L corresponding to different turbidity N are summed up ₂ Obtaining a relation model of membrane flux and water temperature:

the turbidity versus membrane flux curve for the standard condition is shown in figure 7.

(6) The average of the period is lower than t ₀ The corresponding backwash cycle should be adjusted to:

setting: membrane tank standard backwash period duration t ₀ =120 min, the water turbidity N of the backwash cycle ₀ =0.9 NTU, and the formula is given by:

L ₂ =18.63 m ³ /h/m ²

t ₂ =105min

(7) A flow chart of a model of the effect of turbidity on the treated water amount in the standard state is shown in fig. 8.

3. Constructing mathematical model of water treatment quantity and water temperature and adjusting backwashing time

(1) The time points and membrane flux data corresponding to each backwash cycle at different water temperatures 12, 14, 16, 18, 20 and 22 … … ℃ are grouped under the same membrane Chi Jizhun turbidity (0.4 NTU) and reference transmembrane pressure difference (8 kPa).

(2) And obtaining a running time point and membrane flux scatter diagram and a fitting curve of each group of data under different water temperatures.

(3) Obtaining a relation formula of membrane flux and running time at different water temperatures:

water temperature 12 deg.c: l= -0.0174t+17.544

Water temperature 14 ℃: l= -0.0044t+19.49

Water temperature 16 deg.c: l= -0.0031t+19.79

Water temperature 18 deg.c: l= -0.0078t+21.70

Water temperature 20 deg.c: l= -0.0376t+23.925

Water temperature 22 deg.c: l= -0.0065t+21.276

(4) The membrane flux versus run time fit curves for different water temperatures 12, 14, 16, 18, 20, 22, … … were integrated on the same graph as shown in fig. 9.

(5) During the standard backwashing period time t ₀ At=120 min, the membrane flux L corresponding to different water temperatures T is summed up ₃ Obtaining a relation model of membrane flux and water temperature:

the water temperature versus membrane flux curve in the standard state is shown in fig. 10.

for example: membrane tank standard backwash period duration t ₀ =120 min, the average water temperature T in the backwash cycle ₀ =24 ℃, bring into calculation, get:

L ₃ =21.88 m ³ /h/m ²

=160min

(7) To sum up: assuming the average water inlet turbidity N of the backwashing period ₀ =0.9 NTU, average water temperature T ₀ =24 ℃, average transmembrane pressure difference Δh ₀ Membrane pool standard backwash period duration t =10 kPa ₀ Under the condition of =120 min,

membrane tank backwash cycle duration:

t=121(min)

(8) A flow chart of a model of the influence of water temperature on the amount of treated water in the standard state is shown in fig. 11.

4. A mathematical model of the amount of treated water and maintenance clean is constructed and the rate of increase of the transmembrane pressure difference is calculated.

(1) The membrane flux data at the corresponding time points of each maintenance cleaning cycle are grouped.

(2) And obtaining running time points and membrane flux scatter diagrams of different maintainability cleaning periods and fitting curves.

(3) Obtaining a relation formula of membrane flux and running time under different maintainability cleaning periods:

maintenance cleaning cycle Δh= 6.684E-05t+7.932 of 6.20-6.30

Maintenance cleaning cycle Δh= 2.285E-05t+6.59 of 6.30-7.10

Maintenance cleaning cycle Δh= 6.317E-05t+6.029 of 7.10-7.19

Maintenance cleaning cycle Δh=5.196E-05t+5.862 of 7.19-7.20

Maintenance cleaning cycle Δh= 7.716E-05t+5.747 of 7.27-8.05

(4) The transmembrane pressure differences at different membrane fluxes were integrated with the run-time fitted curve onto the same graph as shown in fig. 12.

(5) Average transmembrane pressure differential increase per maintenance cleaning cycle

(6) Rate of increase v of transmembrane pressure difference

And calculating a transmembrane pressure difference increasing value according to the transmembrane pressure difference increasing rate, and adopting different transmembrane pressure difference increasing values to correspond to different maintainability cleaning periods.

5. The film chemical cleaning time was calculated.

(1) Basic transmembrane pressure differential increase rate u

The calculation of the basal transmembrane pressure differential growth rate requires data for one chemical cleaning cycle.

(2) Calculation of film chemical cleaning time

And calculating the time required by the membrane system to reach the maximum allowable value of the transmembrane pressure difference under the transmembrane pressure difference increasing value delta h according to the basic transmembrane pressure difference increasing rate u, namely the chemical cleaning time required under different transmembrane pressure difference increasing values.

In one embodiment of the disclosure, the calculation of the running cost of the membrane pond filtration system is simulated by adopting different transmembrane pressure difference increment values, and theoretical reasonable transmembrane pressure difference increment values are respectively obtained for water plants adopting different process flows. The maximum transmembrane pressure difference for the operation of the existing membrane waterworks is shown in figure 13.

In one embodiment of the present disclosure, referring to fig. 14, the steps of the water plant operation system are:

1. and collecting data such as the water inlet turbidity, the water temperature, the transmembrane pressure difference and the like of each backwashing period of the membrane pond in the past year.

2. Setting a reference water inlet turbidity N ₀ Water temperature t ₀ Membrane flux L ₀ A transmembrane pressure difference increasing value delta h ₀ 。

3. And taking relevant parameters under different reference conditions of the same membrane pool to carry out big data analysis.

4. Establishing a relation model of water temperature and treated water quantity; establishing a relation model of turbidity and treated water quantity; and establishing a relation model of membrane flux and transmembrane pressure difference.

5. Setting membrane tank backwashing actual time t under standard state ₀ . Setting a patrol time interval l ₁ ，l=0，m=0，n=0。

6. Membrane pool emptying times n=n+1.

7. Membrane recovery wash number m=m+1.

8. Membrane backwash time interval l=l+l ₁ 。

9. And calculating the backwashing time t of the membrane tank after adjustment according to the three models.

10. Judging whether l is more than or equal to deltat, if so, continuing, and if not, repeating the steps 8-10.

11. The membrane pool queuing backwash l=0 is set.

13. Judging whether m is more than or equal to m ₀ If yes, continuing, and if not, repeating the steps 7-13.

14. Set film Chi Paikong m=0.

15. Judging whether n is more than or equal to n ₀ If yes, continuing, and if not, repeating the steps 6-15.

16. Membrane pool restorative cleaning n=0.

17. Repeating the steps 6-17.

Corresponding to the ultrafiltration membrane pool operation method of the above embodiment, fig. 15 is a block diagram of an ultrafiltration membrane pool operation apparatus according to an embodiment of the present disclosure. For ease of illustration, only portions relevant to embodiments of the present disclosure are shown. Referring to fig. 15, the ultrafiltration membrane tank operation apparatus 200 includes:

a first backwash time determination module 201, configured to determine a first operation parameter and a first backwash time of the ultrafiltration membrane tank according to historical operation data of the ultrafiltration membrane tank;

a second backwash time determination module 202, configured to update the first backwash time based on a relative relationship between the second operation parameter and the first operation parameter and a pre-constructed relationship model to obtain a second backwash time; the second operation parameter is the current operation parameter of the ultrafiltration membrane pool; the relation model is a relation model between the operation parameters of the ultrafiltration membrane pool constructed based on the first operation parameters and the treated water amount; the operating parameters include: a transmembrane pressure difference increasing value, a transmembrane pressure difference, water temperature and turbidity;

And a backwash control module 203 for controlling queued backwash of the ultrafiltration membrane tank based on the second backwash time.

In one embodiment of the present disclosure, the first backwash time determination module 201 is specifically configured to:

calculating and adopting operation costs corresponding to different transmembrane pressure difference increment values according to historical operation data of the ultrafiltration membrane pool to obtain a target transmembrane pressure difference increment value;

determining a first backwash time based on the target transmembrane pressure differential increase;

In one embodiment of the present disclosure, the second backwash time determination module 202 is specifically configured to:

the first formula is:

wherein,for the second backwash time,/->For the first backwash time,/- >For the second treatment water quantity, +.>Is the first treated water amount.

In one embodiment of the present disclosure, the ultrafiltration membrane pool operating device 200 further comprises a chemical cleaning module, specifically for:

obtaining a basic transmembrane pressure difference increase rate according to historical operation data of the ultrafiltration membrane pool;

determining chemical cleaning time according to the basic transmembrane pressure difference increase rate;

In one embodiment of the present disclosure, the chemical cleaning module is further configured to:

In one embodiment of the present disclosure, the ultrafiltration membrane pool operating device 200 further comprises a maintenance cleaning module, specifically for:

and if the backwashing frequency of the ultrafiltration membrane pool exceeds the preset backwashing frequency, carrying out maintenance cleaning on the ultrafiltration membrane pool.

Referring to fig. 16, fig. 16 is a schematic block diagram of an electronic device according to an embodiment of the present disclosure. The electronic device 300 in the present embodiment as shown in fig. 16 may include: one or more processors 301, one or more input devices 302, one or more output devices 303, and one or more memories 304. The processor 301, the input device 302, the output device 303, and the memory 304 communicate with each other via a communication bus 305. The memory 304 is used to store a computer program comprising program instructions. The processor 301 is configured to execute program instructions stored in the memory 304. Wherein the processor 301 is configured to invoke program instructions to perform the functions of the modules/units of the various device embodiments described above, such as the functions of the modules 200-203 shown in fig. 15.

It should be appreciated that in the disclosed embodiments, the processor 301 may be a central processing unit (Central Processing Unit, CPU), which may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The input device 302 may include a touch pad, a fingerprint sensor (for collecting fingerprint information of a user and direction information of a fingerprint), a microphone, etc., and the output device 303 may include a display (LCD, etc.), a speaker, etc.

The memory 304 may include read only memory and random access memory and provides instructions and data to the processor 301. A portion of memory 304 may also include non-volatile random access memory. For example, the memory 304 may also store information of device type.

In a specific implementation, the processor 301, the input device 302, and the output device 303 described in the embodiments of the present disclosure may perform the implementation described in the first embodiment and the second embodiment of the operation method of the ultrafiltration membrane pool provided in the embodiments of the present disclosure, and may also perform the implementation of the electronic device described in the embodiments of the present disclosure, which is not described herein again.

In another embodiment of the disclosure, a computer readable storage medium is provided, where the computer readable storage medium stores a computer program, where the computer program includes program instructions, where the program instructions, when executed by a processor, implement all or part of the procedures in the method embodiments described above, or may be implemented by instructing related hardware by the computer program, where the computer program may be stored in a computer readable storage medium, where the computer program, when executed by the processor, implements the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, executable files or in some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the content of the computer readable medium can be appropriately increased or decreased according to the requirements of the jurisdiction's jurisdiction and the patent practice, for example, in some jurisdictions, the computer readable medium does not include electrical carrier signals and telecommunication signals according to the jurisdiction and the patent practice.

The computer readable storage medium may be an internal storage unit of the electronic device of any of the foregoing embodiments, such as a hard disk or a memory of the electronic device. The computer readable storage medium may also be an external storage device of the electronic device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the electronic device. Further, the computer-readable storage medium may also include both internal storage units and external storage devices of the electronic device. The computer-readable storage medium is used to store a computer program and other programs and data required for the electronic device. The computer-readable storage medium may also be used to temporarily store data that has been output or is to be output.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be embodied in electronic hardware, in computer software, or in a combination of the two, and that the elements and steps of the examples have been generally described in terms of function in the foregoing description to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the electronic device and unit described above may refer to the corresponding process in the foregoing method embodiment, which is not repeated herein.

In several embodiments provided in the present application, it should be understood that the disclosed electronic device and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via some interfaces or units, or may be an electrical, mechanical, or other form of connection.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purposes of the embodiments of the present disclosure.

In addition, each functional unit in each embodiment of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The foregoing is merely a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any equivalent modifications or substitutions will be apparent to those skilled in the art within the scope of the present disclosure, and these modifications or substitutions should be covered in the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A method of operating an ultrafiltration membrane cell comprising:

Wherein the second operation parameter is the current operation parameter of the ultrafiltration membrane pool; the relation model is constructed based on the first operation parameter and is used for constructing a relation model between the operation parameter of the ultrafiltration membrane pool and the treated water quantity; the operating parameters include: a transmembrane pressure difference increasing value, a transmembrane pressure difference, water temperature and turbidity;

controlling queuing backwash of the ultrafiltration membrane pool based on the second backwash time;

the first operating parameters include a target transmembrane pressure differential increase value, a first treated water amount, a first transmembrane pressure differential, a first water temperature and a first turbidity, the first operating parameters and a first backwash time of the ultrafiltration membrane tank are determined according to historical operating data of the ultrafiltration membrane tank, and the method comprises the following steps:

determining the first backwash time based on the target transmembrane pressure differential increase value;

setting the first treated water amount, the first transmembrane pressure difference, the first water temperature and the first turbidity according to historical operation data of an ultrafiltration membrane pool;

mathematical model of water treatment amount and transmembrane pressure difference, mathematical model of water treatment amount and water temperature, and mathematical model of water treatment amount and turbidity;

The second operation parameters comprise a second treated water amount, a second turbidity, a second water temperature and a second transmembrane pressure difference, the first operation parameters comprise a first treated water amount, the first backwash time is updated based on a relative relation between the second operation parameters and the first operation parameters and a pre-constructed relation model, and the second backwash time is obtained, and the method comprises the following steps:

obtaining the second treated water amount according to a second operation parameter and a pre-constructed relation model;

calculating the second backwash time according to a first formula, the second treated water amount, the first treated water amount and the first backwash time;

the first formula is:

wherein,for the second backwash time, +.>For the first backwash time, +.>For the second treated water amount, +.>For the first treated water amount.

2. The method of operating an ultrafiltration membrane cell of claim 1, further comprising:

obtaining a basic transmembrane pressure difference increase rate according to the historical operation data of the ultrafiltration membrane pool;

3. The method of operating an ultrafiltration membrane cell of claim 2, wherein said determining a chemical cleaning time based on said base transmembrane pressure differential growth rate comprises:

calculating the time required for the transmembrane pressure difference to reach a preset value according to the basic transmembrane pressure difference increase rate; wherein the preset value is a maximum transmembrane pressure difference allowable value;

and determining the time required for the transmembrane pressure difference to reach a preset value as the chemical cleaning time.

4. The method of operating an ultrafiltration membrane cell of claim 1, further comprising:

5. An ultrafiltration membrane cell operation device, comprising:

The backwashing control module is used for controlling queuing backwashing of the ultrafiltration membrane pool based on the second backwashing time;

wherein the first backwash time determination module 201 is specifically configured to:

setting a first treated water amount, a first transmembrane pressure difference, a first water temperature and a first turbidity according to historical operation data of an ultrafiltration membrane pool;

the pre-constructed relationship model comprises:

the second backwash time determination module 202 is specifically configured to:

the first formula is:

6. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 4 when the computer program is executed.

7. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any one of claims 1 to 4.