CN112774453A - Automatic aeration control system and control method for ultrafiltration gas-water mixed membrane equipment - Google Patents
Automatic aeration control system and control method for ultrafiltration gas-water mixed membrane equipment Download PDFInfo
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- CN112774453A CN112774453A CN202011509259.0A CN202011509259A CN112774453A CN 112774453 A CN112774453 A CN 112774453A CN 202011509259 A CN202011509259 A CN 202011509259A CN 112774453 A CN112774453 A CN 112774453A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/18—Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/22—Controlling or regulating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Activated Sludge Processes (AREA)
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Abstract
The invention provides an automatic aeration control system and a control method for an ultrafiltration gas-water mixed membrane device, wherein the automatic control system comprises a gas flow detection unit, a gas pressure detection unit and a liquid pressure detection unit, the detection and comparison of gas pressure and liquid pressure are carried out through a control module so as to judge whether the system meets the aeration working condition, if not, the control module adjusts the air input of an air inlet pipeline, and if not, an alarm is given out, so that the problem of the system working is avoided. The invention can realize the automatic aeration operation of the ultrafiltration gas-water mixed membrane equipment, prevent the error easily caused by manual operation and reduce the investment of labor cost.
Description
Technical Field
The invention relates to the technical field of water treatment equipment, in particular to an automatic aeration control system and method for ultrafiltration gas-water mixed membrane equipment.
Background
The external pressure type gas-water mixed ultrafiltration membrane needs to be subjected to aeration operation periodically during operation, and bubbles generated by aeration can play a role in flushing the surface of an ultrafiltration membrane component in the process of rising in water, so that the pollution and blockage generated during the operation of the gas-water mixed membrane system can be effectively reduced through the aeration operation.
At present conventional aeration means is control air compressor's operating pressure, adopt preventing of manual control valve opening degree to aerate, the unable accurate regulation and control aeration rate of manual control, and then lead to excessive aeration or aeration not enough, this is fairly unfavorable to the steady operation of system, to enterprise's production simultaneously, it must increase the cost of labor to invest in the manpower in a large number to carry out manual aeration, unstable aeration control means makes the stability of equipment relatively poor, the frequency and the cost of later maintenance have been increased, still can influence the quality of water of final play water.
Disclosure of Invention
In view of the above, the present invention provides an automatic aeration control system and method for an ultrafiltration air-water mixing device, which can effectively monitor and control parameters of the aeration device.
The technical scheme of the invention is realized as follows: the invention provides an automatic aeration control system for ultrafiltration air-water mixed membrane equipment, which comprises the ultrafiltration air-water mixed membrane equipment, wherein a water inlet pipe and an air inlet pipe are communicated with the ultrafiltration air-water mixed membrane equipment, a proportional control valve is arranged on the air inlet pipe, the automatic aeration control system also comprises an air pressure sensor, a water pressure sensor, an air pressure transmitter, a water pressure transmitter, an A/D converter and a logic control module, the air pressure sensor is arranged in the air inlet pipe, the water pressure sensor is arranged in the ultrafiltration air-water mixed membrane equipment and is in signal connection with the A/D converter through the air pressure transmitter, the water pressure sensor is in signal connection with the A/D converter through the water pressure transmitter, the A/D converter is in signal connection with the logic control module, and the proportional control valve is in.
On the basis of the technical scheme, the air conditioner further comprises a flow sensor and a flow transmitter, wherein the flow sensor is installed in the air inlet pipe, and the flow sensor is in signal connection with the A/D converter through the flow transmitter.
On the basis of the above technical solution, preferably, the system further comprises a data transmission module and a data management platform, wherein the a/D converter is in signal connection with the data transmission module, and the data transmission module is in signal connection with the data management platform.
On the basis of the above technical solution, preferably, the mobile management terminal further comprises a data transmission module, and the data transmission module is in signal connection with the mobile management terminal.
The invention also provides a control method of the automatic aeration control system for the ultrafiltration air-water mixed membrane equipment, which comprises the following steps:
firstly, when aeration operation is started, a logic control module presets a pressure threshold value P, a gas pressure sensor collects gas pressure of a gas inlet pipeline, a water pressure sensor collects pressure of water in ultrafiltration gas-water mixed membrane equipment, the gas pressure and the water pressure are converted into electric signals respectively, the two kinds of pressure electric signals are transmitted to an A/D converter through a gas pressure transmitter and a water pressure transmitter respectively and are converted into analog-digital signals, and therefore an analog-digital signal value P1 for measuring gas pressure and an analog-digital signal value P2 for measuring water pressure are obtained;
step two, presetting an intake flow target value L by the logic control module, simultaneously collecting the flow of gas in an intake pipe by the flow sensor and obtaining a flow signal, converting the flow signal into an analog-digital signal value L1 of the gas flow by the A/D converter, and adjusting the opening of the proportional control valve by the logic control module according to the preset intake flow target value L;
step three, the A/D converter transmits the converted analog-digital signal values P1 and P2 to a logic control module respectively, the logic control module compares P with P1 and P2, and when at least one of P1 and P2 is larger than P, the logic control module gives an alarm;
step four, when the P1 and the P2 are not more than P, the logic control module continuously compares the P1 and the P2, when the P1 is more than P2+ n, the logic control module carries out aeration control according to preset aeration time T, when the aeration time is over, the proportional control valve is controlled to be closed, and when the P1 is not more than P2+ n, the step five is carried out;
step five, the logic control module controls the opening of the proportional control valve to increase, then the step four is repeated, and when the opening of the proportional control valve reaches the maximum and p1 is not more than p2+ n, the logic control module gives an alarm
Further preferably, the first step further comprises the step of transmitting the measured gas pressure modulus signal value p1 and the measured water pressure modulus signal value p2 to the data management platform and the mobile management terminal respectively through the data transmission module.
On the basis of the above technical solution, preferably, the first step further includes that the mobile management terminal presets a pressure threshold P for the logic control module through the data transmission module.
On the basis of the above technical solution, preferably, the second step further includes that the analog-to-digital signal value l1 of the gas flow is respectively transmitted to the data management platform and the mobile management terminal through the data transmission module.
On the basis of the above technical solution, preferably, the second step further includes that the mobile management terminal presets the intake air flow target value L to the logic control module through the data transmission module.
On the basis of the above technical solution, preferably, in step four, n is 0.05 MPa.
Compared with the prior art, the automatic aeration control system and the control method of the ultrafiltration air-water mixed membrane equipment have the following beneficial effects:
(1) the control system can realize automatic aeration control and early warning on the gas-water mixed membrane equipment, achieves the effect of automatically controlling aeration through the preset aeration time, pressure threshold and flow threshold, and automatically gives an alarm when the system is in the non-safe operation parameter range, so that the safety is high;
(2) the whole device also adopts a remote data management platform and a mobile management terminal to manage data and control parameters, so that remote operation and monitoring of operators are realized, and the device adapts to the development law of the future big data era;
(3) the control method of the invention can lead the aeration system to work within a preset safety range value, and the system has a corresponding feedback adjustment process, can adjust the working parameters to the allowable range as far as possible for normal work, and can automatically give an alarm if the working parameters do not meet the requirement.
Drawings
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a connection diagram of an automatic aeration control system for an ultrafiltration gas-water mixed membrane apparatus according to the present invention.
In the figure: the system comprises 1-ultrafiltration air-water mixed membrane equipment, 2-proportion regulation control valves, 3-air pressure sensors, 4-water pressure sensors, 5-air pressure transmitters, 6-water pressure transmitters, 7-A/D converters, 8-logic control modules, 9-flow sensors, 10-flow transmitters, 11-water inlet pipes, 12-air inlet pipes, 13-data transmission modules, 14-data management platforms and 15-mobile management terminals.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in figure 1, the automatic aeration control system for the ultrafiltration air-water mixed membrane device comprises an ultrafiltration air-water mixed membrane device 1, wherein the ultrafiltration air-water mixed membrane device 1 is used for water treatment and comprises a main container, a plurality of membrane components are arranged in the container, an aeration device is arranged below the membrane components and is communicated with the outside through an air inlet pipe 12, and the main container is communicated with the outside through an water inlet pipe 11.
The device also comprises a proportional control valve 2, an air pressure sensor 3, a water pressure sensor 4, an air pressure transmitter 5, a water pressure transmitter 6, an A/D converter 7, a logic control module 8, a flow sensor 9, a flow transmitter 10, a data transmission module 13, a data management platform 14 and a mobile management terminal 15, wherein the flow sensor 9 and the air pressure sensor 3 are both arranged in an air inlet pipe 12, the proportional control valve 2 is also arranged on the air inlet pipe 12, the water pressure sensor 4 is arranged in a main container, the proportional control valve 2 is in signal connection with the A/D converter 7, the air pressure sensor 3 is in signal connection with the A/D converter 7 through the air pressure transmitter 5, the water pressure sensor 4 is in signal connection with the A/D converter 7 through the water pressure transmitter 6, and the flow sensor 9 is in signal connection with the A/D converter 7 through the flow, the signal sensor 7 is in signal connection with the logic control module 8, the A/D converter 7 is also in signal connection with the data transmission module 13, and the data transmission module 13 is in signal connection with the data management platform 14 and the mobile management terminal 15 respectively.
The proportional control valve 2 is used for controlling the opening of the air inlet pipe 12 so as to control and adjust the aeration amount and the aeration pressure value, and the proportional control valve 2 is installed on the air inlet pipe 12.
The air pressure sensor 3 is used for detecting the pressure value in the air inlet pipe 12, so that the aeration pressure and the water pressure can be compared, and the aeration state can be monitored in real time.
The flow sensor 9 is used for detecting a gas flow value in the gas inlet pipe 12 and collecting and monitoring the gas flow value as an equipment parameter, and the flow sensor 9 is installed in the gas inlet pipe 12.
The air pressure transmitter 5, the water pressure transmitter 6 and the flow transmitter 10 are all used for receiving detection signals of the air pressure sensor 3, the water pressure sensor 4 and the flow sensor 9, converting corresponding detection models into standard signals and transmitting the standard signals to the A/D converter 7.
The A/D converter 7 is used for converting the electric signal of the transmitter into a modulus signal so as to facilitate the processing of the signal by the logic control module 8, and the A/D converter 7 is respectively in signal connection with the logic control module 8, the proportional control valve 2 and the data transmission module 13.
The logic control module 8 is used for receiving and processing the signal and sending a corresponding control signal to control the operation of the proportional control valve 2, the logic control module 8 also has a basic alarm function, and specifically, the logic control module 8 is a PLC single chip microcomputer.
The water inlet pipe 11 is used for inputting water to be treated into the ultrafiltration gas-water mixed membrane device 1.
The air inlet pipe 12 is used for inputting air to the aeration equipment in the ultrafiltration air-water mixed membrane equipment 1 for aeration.
The data transmission module 13 is used for sending the signal passing through the a/D converter 7 to the outside or receiving an external signal and sending the signal to the logic control module 8 or the proportional control valve 2 through the a/D converter 7.
The data management platform 14 is used to collect, store and manage the signals from the data transmission module 13.
The mobile management terminal 15 is used for collecting, storing, monitoring, managing and monitoring signals from the data transmission module 13, and the mobile management terminal 15 can also send control signals to the data transmission module 13 so as to directly control the proportional control valve 2 and the logic control module 8.
The invention also provides an automatic aeration control method for the ultrafiltration gas-water mixed membrane equipment, which comprises the following steps:
the logic control module 8 is preset through the mobile management terminal 15, or parameters are directly preset through the logic control module 8, the preset parameters comprise a pressure threshold value P, a gas flow target value L and an aeration working duration T, when aeration operation is required, the gas pressure P1 of the gas inlet pipe 12 is collected by the gas pressure sensor 3, the water pressure P2 of the ultrafiltration gas-water mixed membrane device is collected by the water pressure sensor 4, and P1 and P are respectively compared with P2 and P.
In the specific embodiment, when P is 0.3MPa, P1 is 0.4MPa, and P2 is 0.5MPa, both P1 and P2 are greater than P, so the roadbed control module 8 gives an alarm and sends the alarm to the data management platform 14 and the mobile management terminal 15 through the data transmission module 13.
In the specific embodiment, when P is 0.3MPa, P1 is 0.2MPa, and P2 is 0.5MPa, P2 is greater than P, so the logic control module 8 alarms and sends an alarm signal to the data management platform 14 and the mobile management terminal 15 through the data transmission module 13.
In the specific embodiment, when P is 0.3MPa, when P1 is 0.4MPa, and P2 is 0.2MPa, P1 is greater than P, so the logic control module 8 alarms and sends an alarm signal to the data management platform 14 and the mobile management terminal 15 through the data transmission module 13.
In a specific embodiment, when P is 0.3MPa, P1 is 0.2MPa, and P2 is 0.3MPa, neither P1 nor P2 is greater than P, at this time, the sizes of P1 and P2 are compared, and P1 is less than P2+0.05MPa, at this time, the logic control module 8 sends a control signal to the proportional control valve 2 through the a/D converter 7, or the mobile management terminal 15 sends a control signal to the proportional control valve 2 through the data transmission module 13 and the a/D converter 7, wherein the signal priority of the data transmission module 13 is greater than the signal priority of the logic control module 8, the opening of the proportional control valve 2 is increased, so as to increase the gas flow and pressure, and then the detection comparison between P1 and P2 is performed in real time. If the opening degree of the proportional control valve 2 reaches the maximum p1 and is still not greater than p2+0.05MPa in the subsequent adjustment process, the logic control module 8 gives an alarm, if the p1 is greater than p2+0.05MPa in the subsequent adjustment process, timing aeration is started, and when the aeration time reaches T, the logic control module 8 or the mobile management terminal 15 sends a control signal to close the proportional control valve 2.
In the specific embodiment, when P is 0.3MPa, P1 is 0.3MPa, and P2 is 0.2MPa, neither P1 nor P2 is greater than P, and P1 is greater than P2+0.05MPa, at this time, the timing of aeration is started, and when the aeration time reaches T, the logic control module 8 or the mobile management terminal 15 sends out a control signal, and the proportional control regulating valve 2 is closed.
In a specific embodiment, when the flow sensor 9 collects a flow signal L1 in the intake pipe 12, the logic control module 8 compares L with L1, when L1 is smaller than L, the logic control module 8 sends a control signal to the proportional control valve 2 through the a/D converter 7 or the mobile management terminal 15 sends a control signal to the proportional control valve 2 through the data transmission module 13 and the a/D converter 7, the proportional control valve 2 is controlled to be opened, and when L1 is larger than L, the logic control module 8 gives an alarm.
In the specific embodiment, the pressure values p1 and p2 and the flow value l1 converted by the a/D converter 7 are all sent to the data management platform 14 and the mobile management terminal 15 through the data transmission module 13.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. An automatic aeration control system for ultrafiltration air-water mixed membrane equipment comprises ultrafiltration air-water mixed membrane equipment (1), wherein an inlet pipe (11) and an inlet pipe (12) are communicated with the ultrafiltration air-water mixed membrane equipment, a proportional control valve (2) is installed on the inlet pipe (11), the automatic aeration control system is characterized by further comprising an air pressure sensor (3), a water pressure sensor (4), an air pressure transmitter (5), a water pressure transmitter (6), an A/D converter (7) and a logic control module (8), the air pressure sensor (3) is installed in the inlet pipe (12), the water pressure sensor (4) is installed in the ultrafiltration air-water mixed membrane equipment (1), the air pressure sensor (3) is in signal connection with the A/D converter (7) through the air pressure transmitter (5), and the water pressure sensor (4) is in signal connection with the A/D converter (7) through the water pressure transmitter (6), the A/D converter (7) is in signal connection with the logic control module (8), and the proportional control valve (2) is in signal connection with the A/D converter (7).
2. The automatic aeration control system for the ultrafiltration gas-water mixed membrane device according to claim 1, further comprising a flow sensor (9) and a flow transmitter (10), wherein the flow sensor (9) is installed in the air inlet pipe (12), and the flow sensor (9) is in signal connection with the A/D converter (7) through the flow transmitter (10).
3. The automatic aeration control system for the ultrafiltration gas-water mixed membrane device according to claim 1, further comprising a data transmission module (13) and a data management platform (14), wherein the A/D converter (7) is in signal connection with the data transmission module (13), and the data transmission module (13) is in signal connection with the data management platform (14).
4. The automatic aeration control system for the ultrafiltration gas-water mixed membrane device according to claim 3, further comprising a mobile management terminal (15), wherein the data transmission module (13) is in signal connection with the mobile management terminal (15).
5. The control method of the automatic aeration control system for the ultra-filtration gas-water mixed membrane device as set forth in any one of claims 1 to 4, characterized by comprising the steps of:
firstly, when aeration operation is started, a pressure threshold value P is preset by a logic control module (8), a gas pressure sensor (3) collects the gas pressure of an air inlet pipe (12), a water pressure sensor (4) collects the pressure of water in ultrafiltration gas-water mixed membrane equipment (1), the gas pressure and the water pressure are converted into electric signals respectively, the two pressure electric signals are transmitted to an A/D converter (7) through a gas pressure transmitter (5) and a water pressure transmitter (6) and are converted into analog-to-digital signals respectively, and therefore an analog-to-digital signal value P1 of measured gas pressure and an analog-to-digital signal value P2 of measured water pressure are obtained;
step two, presetting an intake flow target value L by a logic control module (8), simultaneously collecting the flow of gas in an air inlet pipe (12) by a flow sensor (9) and obtaining a flow signal, converting the flow signal into an analog-digital signal value L1 of the gas flow by an A/D converter (7), and adjusting the opening degree of a control valve (2) by the logic control module (8) according to the preset intake flow target value L;
step three, the A/D converter (7) transmits the converted analog-digital signal values P1 and P2 to the logic control module (8) respectively, the logic control module (8) compares P with P1 and P2, and when at least one of P1 and P2 is larger than P, the logic control module (8) gives an alarm;
step four, when the P1 and the P2 are not more than P, the logic control module (8) continuously compares the P1 and the P2, when the P1 is more than P2+ n, the logic control module (8) carries out aeration control according to the preset aeration time T, when the aeration time is over, the proportional control valve (2) is controlled to be closed, and when the P1 is not more than P2+ n, the step five is carried out;
and step five, the logic control module (8) controls the opening of the proportional control valve (2) to increase, then the step four is repeated, and when the opening of the proportional control valve (2) reaches the maximum and p1 is not greater than p2+ n, the logic control module (8) gives an alarm.
6. The control method of the automatic aeration control system for an ultra-filtration gas-water mixed membrane facility according to claim 5, wherein the first step further comprises the step of transmitting the measured gas pressure modulus signal value p1 and the measured water pressure modulus signal value p2 to the data management platform (14) and the mobile management terminal (15) through the data transmission module (13), respectively.
7. The control method of the automatic aeration control system for an ultrafiltration gas-water mixed membrane device according to claim 5, wherein the first step further comprises the step that the mobile management terminal (15) presets a pressure threshold value P to the logic control module (8) through the data transmission module (13).
8. The control method of the automatic aeration control system for the ultra-filtration gas-water mixed membrane device according to claim 5, wherein the second step further comprises the step of transmitting the analog-to-digital signal l1 of the gas flow rate to the data management platform (14) and the mobile management terminal (15) through the data transmission module (13), respectively.
9. The control method of the automatic aeration control system for the ultrafiltration gas-water mixed membrane device according to claim 5, wherein the second step further comprises the step that the mobile management terminal (15) presets the intake air flow target value L to the logic control module (8) through the data transmission module (13).
10. The method of claim 5, wherein n is 0.05MPa in the fourth step.
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| CN113607237A (en) * | 2021-10-08 | 2021-11-05 | 南通市大安消防技术服务有限公司 | Wireless water pressure transmission device |
| CN116688759A (en) * | 2023-08-07 | 2023-09-05 | 泰州禾益新材料科技有限公司 | Ultrafiltration membrane with air pressure adjusting function |
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| CN113607237A (en) * | 2021-10-08 | 2021-11-05 | 南通市大安消防技术服务有限公司 | Wireless water pressure transmission device |
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