CN115869776A - Control method and device of filtering system and filtering system - Google Patents
Control method and device of filtering system and filtering system Download PDFInfo
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- CN115869776A CN115869776A CN202211657215.1A CN202211657215A CN115869776A CN 115869776 A CN115869776 A CN 115869776A CN 202211657215 A CN202211657215 A CN 202211657215A CN 115869776 A CN115869776 A CN 115869776A
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Abstract
The invention provides a control method and a control device of a filtering system and the filtering system, relates to the technical field of filtering, and solves the problems that a filter membrane of the filtering system in the prior art is easy to break and is rapidly blocked. The control method is used for a filtering system, and specifically comprises the steps of starting the filtering system, and controlling a circulating pump to operate at a first preset flow value; acquiring an actual pressure value when the circulating pump runs at a first preset flow value; judging whether the actual pressure value exceeds a first preset pressure value or not; and if the actual pressure value exceeds the first preset pressure value, controlling the circulating pump to operate at the first preset pressure value. When the whole filtering system starts, a first preset flow value and a first preset pressure value are preset, then the control pump operates at a certain flow, and when the pipeline pressure reaches a certain value, the control pump operates at a certain pressure, so that the phenomena that the filter membrane is broken due to continuous rising of the system pressure and the filter membrane is rapidly blocked due to high flow speed can be avoided.
Description
Technical Field
The invention relates to the technical field of filtration, in particular to a control method and device of a filtration system and the filtration system.
Background
The microbial pharmacy is based on a microbial reaction process, a certain product is synthesized by depending on the growth, reproduction and metabolic processes of a microbial organism in a reactor, the product is extracted and refined by a separation and purification technology, a final preparation is formed to realize the production of a medicine product, a target product needs to be separated, and a filtering device is often used in the separation and purification process.
The common filtration method in the industry is to pump the feed liquid into a filtration device by a pump for filtration, and the operation modes of the pump are generally two. 1. The pump is with the constant flow operation, carries out filterable in-process at entire system promptly, and the pump is all the time with certain flow operation, and its shortcoming is along with filtering constantly going on, and the filter membrane surface accumulation is more and more large granule material, causes the filtration permeability of membrane constantly to descend, leads to system's pressure constantly to rise, and too high pressure can lead to the filter membrane to break, can't continue to filter. 2. The pump operates with the constant pressure, sets up certain pressure value promptly after, the pump is always in order to maintain the invariable operation of system pressure, like this, when system initial pressure is 0, in order to reach and predetermine the pressure value, the system control pump lasts and improves the flow rapidly to the flow increases rapidly, so that the system internal pressure reaches from 0 to predetermine the pressure value rapidly, and too big velocity of flow makes the filter membrane blockked up very fast, leads to the filter capacity of filter membrane to descend fast.
Disclosure of Invention
The invention aims to provide a control method and a control device of a filtering system and the filtering system, and aims to solve the technical problems that a filter membrane of the filtering system is easy to break and the filter membrane is rapidly blocked in the prior art. The technical effects that can be produced by the preferred technical scheme of the technical schemes provided by the invention are described in detail in the following.
In order to realize the purpose, the invention provides the following technical scheme:
according to a first aspect of the present invention, there is provided a control method of a filtration system including a circulation pump, the control method comprising:
starting a filtering system, and controlling the circulating pump to operate at a first preset flow value;
acquiring an actual pressure value when the circulating pump runs at a first preset flow value;
judging whether the actual pressure value exceeds a first preset pressure value or not;
and if the actual pressure value exceeds the first preset pressure value, controlling the circulating pump to operate at the first preset pressure value.
As a further improvement of the present invention, after the controlling the circulation pump to operate at the first preset pressure value if the pressure value of the circulation pump exceeds the first preset pressure value, the controlling method further includes:
acquiring an actual flow value when the circulating pump operates at a first preset pressure value;
and controlling the running state of the filtering system according to the actual flow value and a second preset flow value.
As a further improvement of the present invention, the controlling the operation state of the circulation pump according to the actual flow value and the second preset flow value includes:
comparing the actual flow value with a second preset flow value;
and if the actual flow value is smaller than the second preset flow value, controlling the filtration system to be closed.
As a further improvement of the present invention, said flow rate control device, based on said actual flow rate value and a second preset flow rate value,
controlling the operating state of the circulation pump, further comprising:
and if the actual flow value is larger than or equal to the second preset flow value, controlling the filtering system to continue to operate.
As a further improvement of the present invention, the control method further includes:
and if the actual pressure value does not exceed the first preset pressure value, controlling the circulating pump to continuously operate at a first preset flow value.
As a further improvement of the present invention, in the step of obtaining an actual pressure value when the circulation pump operates at the first preset flow rate value, the actual pressure value is a pressure value in a pipeline close to an outlet of the circulation pump.
According to a second aspect of the present invention, there is provided a control device for a filtration system, comprising:
the first control module is used for controlling the circulating pump to operate at a first preset flow value;
the pressure acquisition module is used for acquiring an actual pressure value when the circulating pump runs at a first preset flow value;
the judging module is used for judging whether the actual pressure value exceeds a first preset pressure value or not;
and the second control module is used for controlling the circulating pump to operate at a first preset pressure value when the actual pressure value exceeds the first preset pressure value.
As a further improvement of the present invention, the apparatus further comprises:
the flow acquisition module is used for acquiring an actual flow value when the circulating pump operates at a first preset pressure value;
and the third control module is used for controlling the running state of the filtering system according to the actual flow value and a second preset flow value.
According to a third aspect of the present invention, there is provided a filtering system comprising a system body, a memory and a processor, the memory storing a computer program which, when the processor is running, executes the above-mentioned control method.
As a further improvement of the present invention, the system body includes a circulation pump, a liquid inlet tank, a liquid collecting tank, a filtering device, and a pressure sensor, the liquid inlet tank is communicated with a liquid inlet of the filtering device through a liquid inlet pipeline, the liquid collecting tank is communicated with a liquid outlet of the filtering device through a liquid outlet pipeline, the circulation pump is disposed on the liquid inlet pipeline, and the pressure sensor is disposed on the liquid inlet pipeline and near an outlet of the circulation pump.
The control method of the filtering system provided by the invention is characterized in that a first preset flow value and a first preset pressure value are preset when the whole filtering system starts, then the pump is controlled to operate at a certain flow rate until the pipeline pressure reaches a certain value, and then the pump is controlled to operate at a certain pressure, so that the problems of filter membrane rupture caused by continuous rising of the system pressure and rapid filter membrane blockage caused by high flow rate can be avoided.
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 embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a method of controlling a filtration system provided by an embodiment of the present invention;
fig. 2 is a schematic flow chart of a method for controlling a filtration system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 1, the present invention provides a control method of a filtering system for a filtering system including a circulation pump.
FIG. 1 is a schematic flow diagram of one embodiment of a method of controlling a filtration system of the present invention, which may include the steps of:
s11, starting a filtering system, and controlling a circulating pump to operate at a first preset flow value;
s12, acquiring an actual pressure value when the circulating pump operates at a first preset flow value;
s13, judging whether the actual pressure value exceeds a first preset pressure value or not;
and S14, if the actual pressure value exceeds the first preset pressure value, controlling the circulating pump to operate at the first preset pressure value.
Optionally, after the step of controlling the circulation pump to operate at the first preset pressure value if the pressure value of the circulation pump exceeds the first preset pressure value, the control method further includes:
s15, acquiring an actual flow value when the circulating pump operates at a first preset pressure value;
and S16, controlling the running state of the filtering system according to the actual flow value and the second preset flow value.
Optionally, in step S16, controlling the operation state of the circulation pump according to the actual flow value and the second preset flow value specifically includes:
s161, comparing the actual flow value with a second preset flow value;
s162, if the actual flow value is smaller than a second preset flow value, controlling the filtering system to be closed;
and S163, if the actual flow value is larger than or equal to the second preset flow value, controlling the filtering system to continue to operate.
Optionally, the control method provided in this embodiment further includes:
and S14', if the actual pressure value does not exceed the first preset pressure value, controlling the circulating pump to continuously operate at the first preset flow value.
In step S12, an actual pressure value among actual pressure values at the time when the circulation pump is operated at the first preset flow rate value is acquired as a pressure value in the pipeline near the outlet of the circulation pump.
Fig. 2 is a specific implementation process of the control method of the filtration system provided in this embodiment. The method comprises the steps that parameters for controlling the circulating pump to operate are preset in a main control module, the parameters for controlling the circulating pump to operate comprise a first preset flow value and a first preset pressure value, and the first flow value and the first preset pressure value are constant values. After the filtering system is started, the circulating pump firstly runs at a preset first preset flow value, the pressure sensor collects the current pressure value at the outlet of the circulating pump in real time, and when the current pressure value collected by the pressure sensor reaches the preset first preset pressure value, the running of the circulating pump is controlled in a PID control mode, and the whole system is maintained to run at the first preset pressure value. I.e. the pump is operated in two phases, the first phase at a first speed and the second phase in order to maintain the system at a first preset pressure value.
In addition, a second preset flow value is also arranged in the system, during the second-stage operation period, the current flow value of the circulating pump is compared with the second preset flow value, and when the current flow is smaller than the second preset flow value, the whole system is controlled to stop working. The purpose of setting the second preset flow value is that in the process of continuous operation of the filtration system, large particulate matters are continuously accumulated on the surface of a filter membrane of the filtration system, so that the permeation capacity of the filter membrane is continuously reduced, and finally, the filter membrane is basically blocked, and at the moment, the system is still maintained at the first preset pressure value, but the flow of the system is very small and is close to the state of one drop, if the process is continuously carried out, the filtration efficiency is very low, so that a proper flow value is set, and the system is timely closed after the filter membrane is blocked, so that the problems that the efficiency of the filtration system is too low and the time is wasted are avoided.
The following are embodiments of the apparatus of the present invention that may be used to perform embodiments of the method of the present invention. For details which are not disclosed in the embodiments of the apparatus according to the invention, reference is made to the embodiments of the process according to the invention.
The disclosed example embodiments provide a control apparatus of a filtering system for controlling a filtering system. The control device of the filtration system of the present example embodiment may include a first control module, a pressure acquisition module, a determination module, and a second control module.
In the present exemplary embodiment, a first control module for controlling the circulation pump to operate at a first preset flow value;
in the present exemplary embodiment, the pressure acquisition module is configured to acquire an actual pressure value when the circulation pump is operated at a first preset flow value;
in the present exemplary embodiment, the determining module is configured to determine whether the actual pressure value exceeds a first preset pressure value;
in this example embodiment, the second control module is configured to control the circulation pump to operate at a first preset pressure value when the actual pressure value exceeds the first preset pressure value.
In addition, the control device of the filtration system in this embodiment further includes a flow rate obtaining module and a third control module, where the flow rate obtaining module is configured to obtain an actual flow rate value when the circulation pump operates at a first preset pressure value; and the third control module is used for controlling the running state of the filtering system according to the actual flow value and the second preset flow value.
The specific details of each module in the control device of the filtering system have been described in detail in the corresponding control method embodiment of the filtering system, and therefore are not described herein again. The advantageous effects of the control device of the filtering system according to this exemplary embodiment can refer to the advantageous effects of the control method of the filtering system described above, and are not described herein again.
The invention also provides a filtering system, which comprises a system body, a memory and a processor, wherein the memory stores a computer program, and the computer program executes the control method of the filtering system when the processor runs.
As an optional implementation manner of the embodiment of the present invention, the system body includes a circulation pump, a liquid inlet tank, a liquid collecting tank, a filtering device, and a pressure sensor, the liquid inlet tank is communicated with a liquid inlet of the filtering device through a liquid inlet pipeline, the liquid collecting tank is communicated with a liquid outlet of the filtering device through a liquid outlet pipeline, the circulation pump is disposed on the liquid inlet pipeline, and the pressure sensor is disposed on the liquid inlet pipeline and near an outlet of the circulation pump.
According to the filtering system provided by the invention, the pump is controlled to operate at a constant flow rate firstly until the pressure in the system reaches a first preset pressure value, and the pump is controlled to operate at the first preset pressure value by a PID control mode. The pump is controlled to operate in two stages, the filter membrane is prevented from being blocked due to the fact that the rotating speed of the pump is too high, and the filter membrane is prevented from being damaged due to the fact that the pressure of the system rises continuously. And automatic control is realized, manual adjustment is not needed in the system operation process, labor is saved, and efficiency is high.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A control method for a filtration system including a circulation pump, the control method comprising:
starting a filtering system, and controlling the circulating pump to operate at a first preset flow value;
acquiring an actual pressure value when the circulating pump operates at a first preset flow value;
judging whether the actual pressure value exceeds a first preset pressure value or not;
and if the actual pressure value exceeds the first preset pressure value, controlling the circulating pump to operate at the first preset pressure value.
2. The method of claim 1, wherein after controlling the circulation pump to operate at a first preset pressure value if the pressure value of the circulation pump exceeds the first preset pressure value, the method further comprises:
acquiring an actual flow value when the circulating pump operates at a first preset pressure value;
and controlling the running state of the filtering system according to the actual flow value and a second preset flow value.
3. The method for controlling a filtration system according to claim 2, wherein said controlling the operation state of the circulation pump according to the actual flow value and the second preset flow value comprises:
comparing the actual flow value with a second preset flow value;
and if the actual flow value is smaller than the second preset flow value, controlling the filtration system to be closed.
4. The method for controlling a filtration system according to claim 3, wherein said controlling the operation state of the circulation pump based on the actual flow value and a second preset flow value further comprises:
and if the actual flow value is larger than or equal to the second preset flow value, controlling the filtering system to continue to operate.
5. The control method of a filtration system according to claim 1, further comprising:
and if the actual pressure value does not exceed the first preset pressure value, controlling the circulating pump to continuously operate at a first preset flow value.
6. The method for controlling a filtration system according to claim 1, wherein in the step of obtaining the actual pressure value at the time of operating the circulation pump at the first preset flow rate value, the actual pressure value is a pressure value in the pipeline near the outlet of the circulation pump.
7. A control device for a filtration system, comprising:
the first control module is used for controlling the circulating pump to operate at a first preset flow value;
the pressure acquisition module is used for acquiring an actual pressure value when the circulating pump runs at a first preset flow value;
the judging module is used for judging whether the actual pressure value exceeds a first preset pressure value or not;
and the second control module is used for controlling the circulating pump to operate at a first preset pressure value when the actual pressure value exceeds the first preset pressure value.
8. The control device for a filtration system as set forth in claim 7, further comprising:
the flow acquisition module is used for acquiring an actual flow value when the circulating pump operates at a first preset pressure value;
and the third control module is used for controlling the running state of the filtering system according to the actual flow value and a second preset flow value.
9. A filtration system comprising a system body, a memory, and a processor, the memory storing a computer program that, when executed by the processor, performs the control method of any one of claims 1 to 6.
10. The filtering system as claimed in claim 9, wherein the system body comprises a circulating pump, a liquid inlet tank, a liquid collecting tank, a filtering device and a pressure sensor, the liquid inlet tank is communicated with a liquid inlet of the filtering device through a liquid inlet pipeline, the liquid collecting tank is communicated with a liquid outlet of the filtering device through a liquid outlet pipeline, the circulating pump is arranged on the liquid inlet pipeline, and the pressure sensor is arranged on the liquid inlet pipeline and close to an outlet of the circulating pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211657215.1A CN115869776A (en) | 2022-12-22 | 2022-12-22 | Control method and device of filtering system and filtering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211657215.1A CN115869776A (en) | 2022-12-22 | 2022-12-22 | Control method and device of filtering system and filtering system |
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| Publication Number | Publication Date |
|---|---|
| CN115869776A true CN115869776A (en) | 2023-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211657215.1A Pending CN115869776A (en) | 2022-12-22 | 2022-12-22 | Control method and device of filtering system and filtering system |
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| CN (1) | CN115869776A (en) |
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- 2022-12-22 CN CN202211657215.1A patent/CN115869776A/en active Pending
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