CN115400444B - Rectifying tower control method, storage medium and electronic equipment - Google Patents
Rectifying tower control method, storage medium and electronic equipment Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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Abstract
The invention provides a rectifying tower control method, a storage medium and electronic equipment, wherein the method comprises the steps of obtaining the current tower kettle liquid level and the current tower kettle temperature of a rectifying tower in real time; and controlling the running state of the rectifying tower according to the current tower kettle liquid level, the current tower kettle temperature and preset target rectifying tower information. By implementing the invention, the temperature and the liquid level of the tower kettle can be accurately controlled, the automatic control of the rectifying tower is realized, the working efficiency and the safety are improved, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a rectifying tower control method, a storage medium and electronic equipment.
Background
The chemical industry is an important component of our national economy, and has important influence on the economic development of China and the life of people. In the chemical flow industry, reaction and separation are the two most central parts of the chemical industry. The reaction is used for obtaining chemical products, and the separation is mainly used for refining products, removing impurities, recycling raw materials and the like. The rectifying tower is used as a very mature separation unit in the chemical process, and has very wide application in the process flow. Most of products of the rectifying tower are final products of a process flow or raw materials of the next process, so that the quality of the control condition of the rectifying tower directly influences the operation condition of the whole process, and the stable operation of the rectifying tower is also important to maintain the quality stability of the products.
Due to scale limitation, the current partial rectifying tower adopts an intermittent extraction design, firstly, heavy components are accumulated in the tower kettle, then the heavy components are concentrated by increasing the steam pressure, and after the concentration is finished, the heavy components are extracted and packaged.
However, the inventor finds that in the process of realizing the invention, the whole process of the existing intermittent extraction rectifying tower is manually adjusted according to the experience of operators, so that the problems of overlarge steam quantity or overlarge liquid level in the process and the like are unavoidable, the problems of overhigh temperature in the rectifying tower, cavitation of a tower bottom pump, pipeline blockage caused by heavy component evaporation, overflow of materials with overlarge liquid level and the like are easy to cause, and the safety production is not facilitated.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a rectifying tower control method, a storage medium and electronic equipment, so that the temperature and the liquid level of a tower kettle are precisely controlled, the rectifying tower is automatically controlled, the working efficiency and the safety are improved, and the cost is reduced.
The technical scheme of the invention provides a rectifying tower control method, which comprises the following steps:
acquiring the current tower kettle liquid level and the current tower kettle temperature of the rectifying tower in real time;
and controlling the running state of the rectifying tower according to the current tower kettle liquid level, the current tower kettle temperature and preset target rectifying tower information, wherein the target rectifying tower information comprises a first target tower kettle liquid level, a first target tower kettle temperature and a second target tower kettle temperature, the first target tower kettle temperature is smaller than the second target tower kettle temperature, and the running state comprises a concentration state, a liquid collecting state and a extraction state.
Further, the controlling the operation state of the rectifying tower according to the current tower kettle liquid level, the current tower kettle temperature and the preset target rectifying tower information includes:
if the current tower kettle liquid level is smaller than the first target tower kettle liquid level, controlling the rectifying tower to be in the liquid collection state;
if the current tower kettle liquid level is greater than the first target tower kettle liquid level, controlling the rectifying tower to be in the concentration state;
and if the current tower kettle liquid level is equal to the first target tower kettle liquid level and the current tower kettle temperature is equal to the second target tower kettle temperature, controlling the rectifying tower to be in the extraction state.
Further, if the current tower kettle liquid level is smaller than the first target tower kettle liquid level, controlling the rectifying tower to be in the liquid collection state includes:
if the current tower kettle liquid level is smaller than the first target tower kettle liquid level, acquiring a first current steam pressure of the rectifying tower, a preset first steam pressure threshold value and a first current valve opening of a steam regulating valve;
and controlling the first target steam pressure of the rectifying tower and the first target valve opening of the steam regulating valve according to the current tower kettle temperature, the second target tower kettle temperature, the first current steam pressure, the first steam pressure threshold and the first current valve opening until the current tower kettle liquid level is equal to the first target tower kettle liquid level.
Further, the controlling the first target vapor pressure of the rectifying tower and the first target valve opening of the vapor regulating valve according to the current tower kettle temperature, the second target tower kettle temperature, the first current vapor pressure, the first vapor pressure threshold and the first current valve opening includes:
calculating the first target steam pressure according to the first steam pressure threshold value and the difference value between the current tower kettle temperature and the second target tower kettle temperature;
and calculating the first target valve opening according to the first current valve opening and the difference value between the first target steam pressure and the first current steam pressure.
Further, if the current column bottom liquid level is greater than the first target column bottom liquid level, controlling the rectifying column to be in the concentrated state includes:
if the current tower kettle liquid level is greater than the first target tower kettle liquid level, acquiring a second current steam pressure of the rectifying tower, a preset second steam pressure threshold value and a second current valve opening of a steam regulating valve;
and controlling the second target steam pressure of the rectifying tower and the second target valve opening of the steam regulating valve according to the current tower kettle liquid level, the first target tower kettle liquid level, the second current steam pressure, the second steam pressure threshold and the second current valve opening until the current tower kettle temperature is equal to the first target tower kettle temperature.
Further, the controlling the second target vapor pressure of the rectifying tower and the second target valve opening of the vapor regulating valve according to the current column bottom liquid level, the first target column bottom liquid level, the second current vapor pressure, the second vapor pressure threshold and the second current valve opening includes:
calculating the second target steam pressure according to the second steam pressure threshold value and the difference value between the current tower kettle liquid level and the first target tower kettle liquid level;
and calculating the second target valve opening according to the second current valve opening and the difference value between the second target steam pressure and the second current steam pressure.
Further, if the current column bottoms liquid level is equal to the first target column bottoms liquid level, and the current column bottoms temperature is equal to the second target column bottoms temperature, controlling the rectifying column to be in the extraction state includes:
if the current tower kettle temperature is equal to the first target tower kettle liquid level and the current tower kettle temperature is equal to the second target tower kettle temperature, stopping controlling the steam pressure and the steam regulating valve of the rectifying tower, and opening the extraction valve and timing.
Further, the target rectifying tower information further includes a second target tower kettle liquid level, the second target tower kettle liquid level is smaller than the first target tower kettle liquid level, the control of the steam regulating valve and the steam pressure of the rectifying tower is stopped, the extraction valve is opened and timing is performed, and then the method further includes:
and if the current tower kettle liquid level is smaller than the second target tower kettle liquid level, or the timing reaches a preset time threshold, closing the extraction valve, and controlling the rectifying tower to be in the liquid collection state or the concentration state.
The technical solution of the present invention also provides a storage medium storing computer instructions for executing all the steps of the rectifying column control method as described above when the computer executes the computer instructions.
The technical scheme of the invention also provides electronic equipment, which comprises:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the rectification column control method as previously described.
After the technical scheme is adopted, the method has the following beneficial effects: the current tower kettle liquid level and the current tower kettle temperature of the rectifying tower are obtained in real time, and the running state of the rectifying tower is controlled according to the current tower kettle liquid level, the current tower kettle temperature and preset target rectifying tower information, so that the tower kettle temperature and the liquid level are accurately controlled, the rectifying tower is automatically controlled, the working efficiency is improved, safety accidents caused by manual operation errors are avoided, the safety is improved, and the cost is reduced.
Drawings
The present disclosure will become more readily understood with reference to the accompanying drawings. It should be understood that: the drawings are for illustrative purposes only and are not intended to limit the scope of the present invention. In the figure:
FIG. 1 is a schematic diagram of a control system of a rectifying tower according to the present invention;
fig. 2 is a working flow chart of a rectifying tower control method according to a second embodiment of the present invention;
fig. 3 is a working flow chart of a rectifying tower control method according to a third embodiment of the present invention;
fig. 4 is a schematic hardware structure of an electronic device for controlling a rectifying tower according to a fifth embodiment of the present invention.
Detailed Description
Specific embodiments of the present invention will be further described below with reference to the accompanying drawings.
It is to be readily understood that, according to the technical solutions of the present invention, those skilled in the art may replace various structural modes and implementation modes with each other without changing the true spirit of the present invention. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit the invention to the precise form disclosed.
Terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible to be mentioned in the present specification are defined with respect to the configurations shown in the drawings, which are relative concepts, and thus may be changed according to different positions and different use states thereof. These and other directional terms should not be construed as limiting terms.
Example 1
As shown in fig. 1, a rectifying tower control system applied to the rectifying tower control method of the present invention comprises a raw material tank T1001, a rectifying tower C1001, a product storage tank T1002, a reboiler E1001, a condenser E1002, a tower kettle liquid level meter 11, a tower kettle thermometer 12, a steam regulating valve 13, a production valve 14 and a controller (not shown in the figure), wherein the input end of the rectifying tower C1001 is respectively communicated with the raw material tank T1001, the reboiler E1001 and the condenser E1002, the output end of the rectifying tower C1001 is respectively communicated with the product storage tank T1002 through the production valve 14, the input end of the controller is respectively communicated with the tower kettle liquid level meter 11 and the tower kettle thermometer 12, and the output end of the controller is respectively communicated with the steam regulating valve 13 and the production valve 14.
The tower kettle liquid level meter 11 is used for acquiring the current tower kettle liquid level of the rectifying tower in real time and transmitting the current tower kettle liquid level to the controller.
The tower kettle thermometer 12 is used for acquiring the current tower kettle temperature of the rectifying tower in real time and transmitting the current tower kettle temperature to the controller.
The steam regulating valve 13 is used to control the liquid level and temperature of the rectifying column by regulating the steam pressure.
The extraction valve 14 is used to extract the product in the rectifying column.
The controller is used for receiving the current tower kettle liquid level transmitted by the tower kettle liquid level meter 11 and/or the current tower kettle temperature transmitted by the tower kettle temperature meter 12, and controlling the opening or closing of the steam regulating valve 13 and the extraction valve 14 according to the current tower kettle liquid level or the current tower kettle temperature. The controller of the present invention may be a stand-alone chip with processing capability or a programmable logic controller (Programmable Logic Control ler, PLC), preferably a PLC.
Example two
As shown in fig. 2, fig. 2 is a workflow of a rectifying tower control method according to a first embodiment of the present invention, including:
step S201: acquiring the current tower kettle liquid level and the current tower kettle temperature of the rectifying tower in real time;
step S202: and controlling the running state of the rectifying tower according to the current tower kettle liquid level, the current tower kettle temperature and preset target rectifying tower information.
Specifically, when the operation of the rectifying tower is started, the controller performs step S201 to obtain the current tank liquid level and the current tank temperature of the rectifying tower in real time, and performs step S202 to control the operation state of the rectifying tower according to the current tank liquid level, the current tank temperature and the preset target rectifying tower information. The target rectifying tower information comprises a first target tower kettle liquid level, a first target tower kettle temperature and a second target tower kettle temperature, the first target tower kettle temperature is smaller than the second target tower kettle temperature, and the operation state comprises a concentration state, a liquid collection state and a extraction state.
According to the invention, the current tower kettle liquid level and the current tower kettle temperature of the rectifying tower are obtained in real time, and the running state of the rectifying tower is controlled according to the current tower kettle liquid level, the current tower kettle temperature and the preset target rectifying tower information, so that the tower kettle temperature and the liquid level are accurately controlled, the automatic control of the rectifying tower is realized, the working efficiency is improved, the safety accidents caused by manual operation errors are avoided, the safety is improved, and the cost is reduced.
In one embodiment, to further improve accuracy, step S202 includes:
if the current tower kettle liquid level is smaller than the first target tower kettle liquid level, controlling the rectifying tower to be in a liquid collecting state;
if the current tower kettle liquid level is greater than the first target tower kettle liquid level, controlling the rectifying tower to be in a concentrated state;
and if the current tower kettle liquid level is equal to the first target tower kettle liquid level and the current tower kettle temperature is equal to the second target tower kettle temperature, controlling the rectifying tower to be in a production state.
Embodiment III:
as shown in fig. 3, fig. 3 is a working flow chart of a rectifying tower control method according to a third embodiment of the present invention, including:
step S301: acquiring the current tower kettle liquid level and the current tower kettle temperature of the rectifying tower in real time;
step S302: judging whether the current tower kettle liquid level is smaller than a first target tower kettle liquid level;
step S303: acquiring a first current steam pressure of a rectifying tower, a preset first steam pressure threshold value and a first current valve opening of a steam regulating valve;
step S304: controlling the first target steam pressure of the rectifying tower and the first target valve opening of the steam regulating valve according to the current tower kettle temperature, the second target tower kettle temperature, the first current steam pressure, the first steam pressure threshold value and the first current valve opening;
step S305: judging whether the current tower kettle liquid level is equal to the first target tower kettle liquid level;
step S306: judging whether the current tower kettle liquid level is greater than a first target tower kettle liquid level;
step S307: acquiring a second current steam pressure of the rectifying tower, a preset second steam pressure threshold value and a second current valve opening of the steam regulating valve;
step S308: controlling the second target steam pressure of the rectifying tower and the second target valve opening of the steam regulating valve according to the current tower kettle liquid level, the first target tower kettle liquid level, the second current steam pressure, the second steam pressure threshold and the second current valve opening;
step S309: judging whether the current tower kettle temperature is equal to the first target tower kettle temperature;
step S310: judging whether the current tower kettle temperature is equal to the first target tower kettle liquid level or not, and judging whether the current tower kettle temperature is equal to the second target tower kettle temperature or not;
step S311: stopping controlling the steam pressure and the steam regulating valve of the rectifying tower, and opening the extraction valve and timing;
step S312: judging whether the current tower kettle liquid level is smaller than a second target tower kettle liquid level or whether the timing reaches a preset time threshold;
step S313: closing the extraction valve and controlling the rectifying tower to be in a liquid collection state or a concentration state.
Specifically, when the rectifying tower starts to operate, the controller executes step S301 to acquire the current tower kettle liquid level and the current tower kettle temperature of the rectifying tower in real time, and executes step S302 to determine whether the current tower kettle liquid level is smaller than the first target tower kettle liquid level, if yes, step S303-step S305 are executed, the first target steam pressure and the opening of the first target valve are regulated through the steam regulating valve, so as to realize a control temperature loop, until the current tower kettle liquid level is equal to the first target tower kettle liquid level, otherwise, step S306 is executed;
in step S305, it is determined whether the current tank liquid level is equal to the first target tank liquid level, if yes, step S306 is performed, the control temperature loop is switched to the control liquid level loop, otherwise, step S303-step S305 are performed continuously.
In step S306, it is determined whether the current tank liquid level is greater than the first target tank liquid level, if yes, step S307-step S309 are performed, and the second target steam pressure and the second target valve opening are adjusted by the steam adjusting valve, so as to implement control of the liquid level loop, until the current tank temperature is equal to the first target tank temperature, otherwise, step S310 is performed.
In step S309, it is determined whether the current tank temperature is equal to the first target tank temperature, if yes, step S310 is performed, otherwise, steps S306-S308 are continuously performed.
In step S310, it is determined whether the current tank temperature is equal to the first target tank liquid level, and whether the current tank temperature is equal to the second target tank temperature, if yes, step S311-step S312 are performed, the operation state of the rectifying tower is controlled to be a recovery state, the product in the rectifying tower is recovered, and if not, step S302 is performed.
In step S312, it is determined whether the current tank liquid level is less than the second target tank liquid level, or whether the timer reaches a preset time threshold, if yes, step S313 is executed, otherwise, step S311 is continuously executed.
In step S313, or the current tank liquid level is less than the second target tank liquid level, or the timer reaches a preset time threshold, the extraction valve is closed, and steps S302-S305 or steps S306-S309 are cyclically executed, and the control temperature loop or the control liquid level loop is automatically commissioned.
The order of steps S302-S305, steps S306-S309 and steps S310-S313 is merely for convenience of description, and does not limit the claims, and it should be understood by those skilled in the art that the order of steps S302-S305, steps S306-S309 and steps S310-S313 may be interchanged or synchronized without affecting the actual effect.
According to the invention, the current tower kettle liquid level and the current tower kettle temperature of the rectifying tower are obtained in real time, and the running state of the rectifying tower is controlled according to the current tower kettle liquid level, the current tower kettle temperature and the preset target rectifying tower information, so that the tower kettle temperature and the liquid level are accurately controlled, the automatic control of the rectifying tower is realized, the working efficiency is improved, the safety accidents caused by manual operation errors are avoided, the safety is improved, and the cost is reduced.
In one embodiment, to further improve accuracy, step S304 includes:
calculating a first target steam pressure according to a first steam pressure threshold value and a difference value between the current tower kettle temperature and a second target tower kettle temperature;
and calculating the first target valve opening according to the first current valve opening and the difference value between the first target steam pressure and the first current steam pressure.
Specifically, the first target vapor pressure is calculated using the following formula:
wherein PSP 1 Is a first target vapor pressure; PSP (Power System Point) 0 Is a first vapor pressure threshold; t (T) e The difference value between the current tower kettle temperature and the second target tower kettle temperature; k (K) p 、T d And T s To adjust parameters, K p 、T d And T s The setting can be performed according to the user's needs.
The first target valve opening is calculated using the following equation:
wherein VO is 1 Is the first target valve opening; VO (VO) 0 The first current valve opening is the first current valve opening; p (P) e1 Is the difference between the first target vapor pressure and the first current vapor pressure.
In one embodiment, the parameter K is adjustable p 、T d And T s Can be obtained by the following method:
switching the control temperature loop or the control liquid level loop to a manual position to obtain a third current valve opening and a third current steam pressure of the steam regulating valve;
adjusting the third current valve opening to be a third target valve opening, and storing a first adjusting time corresponding to the moment;
acquiring a fourth current steam pressure corresponding to the stabilized steam regulating valve and a second regulating time when the steam regulating valve changes from the third current steam pressure to the fourth current steam pressure;
acquiring a third adjusting time required by a third target steam pressure reached by the steam adjusting valve after the transfer function is changed;
and calculating an adjustable parameter according to the third current valve opening, the third current steam pressure, the third target valve opening, the fourth current steam pressure, the first adjustment time, the second adjustment time and the third adjustment time.
Specifically, the parameter K can be adjusted p 、T d And T s Calculated using the following formula:
wherein MV is 1 The third current valve opening; PV (photovoltaic) system 1 Is the third current steam pressure; MV (motion vector) 2 Is the third target valve opening; PV (photovoltaic) system 2 Is the fourth current steam pressure; t is t 1 Is a first adjustment time; t is t 2 For a second adjustment time; t is t 3 Is the third adjustment time.
In one embodiment, the third target vapor pressure is calculated using the following equation:
PV 3 ＝PV 1 +0.632*(PV 2 -PV 1 )
wherein PV 3 Is the third target vapor pressure.
In one embodiment, to further improve accuracy, step S308 includes:
calculating a second target steam pressure according to a second steam pressure threshold value and a difference value between the current tower kettle liquid level and the first target tower kettle liquid level;
and calculating the second target valve opening according to the second current valve opening and the difference value between the second target steam pressure and the second current steam pressure.
Specifically, the second target vapor pressure is calculated using the following formula:
wherein PSP 2 Is the second target vapor pressure; PSP' 0 Is a second vapor pressure threshold; l (L) e Is the difference between the current tower kettle liquid level and the first target tower kettle liquid level.
The second target valve opening is calculated using the following equation:
wherein VO is 2 Is the second target valve opening; VO'. 0 The second current valve opening; p (P) e2 Is the difference between the second target vapor pressure and the second current vapor pressure.
Example IV
A fourth embodiment of the present invention provides a storage medium for storing computer instructions that, when executed by a computer, are configured to perform all the steps of the rectifying column control method in any of the method embodiments described above.
Example five
As shown in fig. 4, a hardware structure schematic diagram of an electronic device for controlling a rectifying tower according to a fifth embodiment of the present invention includes:
at least one processor 401; the method comprises the steps of,
a memory 402 communicatively coupled to the at least one processor 401; wherein,
the memory 402 stores instructions executable by the at least one processor 401, the instructions being executable by the at least one processor 401 to enable the at least one processor 401 to perform the rectification column control method as described previously.
One processor 401 is illustrated in fig. 4.
The electronic device is preferably a controller of the present invention.
The electronic device may further include: an input device 403 and an output device 404.
The processor 401, memory 402, input device 403, and output device 404 may be connected by a bus or other means, which is illustrated as a bus connection.
The memory 402 is used as a non-volatile computer readable storage medium, and may be used to obtain a non-volatile software program, a non-volatile computer executable program, and modules, such as program instructions/modules corresponding to the rectifying column control method in the embodiments of the present application, for example, the method flows shown in fig. 2-3. The processor 401 executes various functional applications and data processing by running nonvolatile software programs, instructions and modules acquired in the memory 402, that is, implements the rectifying column control method in the above-described embodiment.
Memory 402 may include an acquisition program area and an acquisition data area, wherein the acquisition program area may acquire an operating system, at least one application program required for a function; the acquisition data area may acquire data created according to the use of the rectifying column control method, and the like. In addition, memory 402 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 402 may optionally include memory remotely located with respect to processor 401, which may be connected via a network to the apparatus performing the rectification column control method. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 403 may receive input user clicks and generate signal inputs related to user settings and function control of the rectifying column control method. The output 404 may include a display device such as a display screen.
The rectification column control method in any of the method embodiments described above is performed in the one or more modules, which are retrieved in the memory 402, when executed by the one or more processors 401.
The product can execute the method provided by the embodiment of the application, and has the corresponding functional modules and beneficial effects of the execution method. Technical details not described in detail in this embodiment may be found in the methods provided in the embodiments of the present application.
The electronic device of the embodiments of the present invention exists in a variety of forms including, but not limited to:
(1) The electronic control unit (Electronic Control Unit, ECU) is also called as a "traveling computer", "vehicle-mounted computer", etc. The device mainly comprises a microprocessor (CPU), a memory (ROM, RAM), an input/output interface (I/O), an analog-to-digital converter (A/D), and large-scale integrated circuits such as shaping and driving.
(2) Mobile communication devices, which are characterized by mobile communication functionality and are aimed at providing voice, data communication. Such terminals include smart phones (e.g., iPhone), multimedia phones, functional phones, and low-end phones, among others.
(3) Ultra mobile personal computer equipment, which belongs to the category of personal computers, has the functions of calculation and processing and generally has the characteristic of mobile internet surfing. Such terminals include PDA, MID, and UMPC devices, etc.
(4) Portable entertainment devices such devices can display and play multimedia content. Such devices include audio, video players (e.g., iPod), palm game consoles, electronic books, and smart toys and portable car navigation devices.
(5) The server is similar to a general computer architecture in that the server is provided with high-reliability services, and therefore, the server has high requirements on processing capacity, stability, reliability, safety, expandability, manageability and the like.
(6) Other electronic devices with data interaction function.
Further, the logic instructions in the memory 402 described above may be implemented in the form of software functional units and may be retrieved from a computer readable storage medium for sale or use as a stand alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product, which is obtained in a storage medium and includes several instructions for causing a mobile terminal (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of acquiring program codes.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment of the invention. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be obtained in a computer readable storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A rectifying column control method, characterized by comprising:
acquiring the current tower kettle liquid level and the current tower kettle temperature of the rectifying tower in real time;
controlling the running state of the rectifying tower according to the current tower kettle liquid level, the current tower kettle temperature and preset target rectifying tower information, wherein the target rectifying tower information comprises a first target tower kettle liquid level, a first target tower kettle temperature and a second target tower kettle temperature, the first target tower kettle temperature is smaller than the second target tower kettle temperature, and the running state comprises a concentration state, a liquid collecting state and a extraction state: if the current tower kettle liquid level is smaller than the first target tower kettle liquid level, controlling the rectifying tower to be in the liquid collecting state: if the current tower kettle liquid level is smaller than the first target tower kettle liquid level, acquiring a first current steam pressure of the rectifying tower, a preset first steam pressure threshold value and a first current valve opening of a steam regulating valve; controlling a first target steam pressure of the rectifying tower and a first target valve opening of the steam regulating valve according to the current tower kettle temperature, the second target tower kettle temperature, the first current steam pressure, the first steam pressure threshold and the first current valve opening until the current tower kettle liquid level is equal to the first target tower kettle liquid level; if the current tower kettle liquid level is greater than the first target tower kettle liquid level, controlling the rectifying tower to be in the concentration state: if the current tower kettle liquid level is greater than the first target tower kettle liquid level, acquiring a second current steam pressure of the rectifying tower, a preset second steam pressure threshold value and a second current valve opening of a steam regulating valve; controlling a second target steam pressure of the rectifying tower and a second target valve opening of the steam regulating valve according to the current tower kettle liquid level, the first target tower kettle liquid level, the second current steam pressure, the second steam pressure threshold and the second current valve opening until the current tower kettle temperature is equal to the first target tower kettle temperature; and if the current tower kettle liquid level is equal to the first target tower kettle liquid level and the current tower kettle temperature is equal to the second target tower kettle temperature, controlling the rectifying tower to be in the extraction state.
2. The rectifying column control method of claim 1, wherein said controlling a first target vapor pressure of said rectifying column and a first target valve opening of said vapor regulating valve in accordance with said current column bottom temperature, said second target column bottom temperature, said first current vapor pressure, said first vapor pressure threshold value, and said first current valve opening comprises:
calculating the first target steam pressure according to the first steam pressure threshold value and the difference value between the current tower kettle temperature and the second target tower kettle temperature;
and calculating the first target valve opening according to the first current valve opening and the difference value between the first target steam pressure and the first current steam pressure.
3. The rectifying column control method of claim 1, wherein said controlling a second target vapor pressure of said rectifying column and a second target valve opening of said vapor regulating valve in accordance with said current column bottom liquid level, said first target column bottom liquid level, said second current vapor pressure, said second vapor pressure threshold value, and said second current valve opening comprises:
calculating the second target steam pressure according to the second steam pressure threshold value and the difference value between the current tower kettle liquid level and the first target tower kettle liquid level;
and calculating the second target valve opening according to the second current valve opening and the difference value between the second target steam pressure and the second current steam pressure.
4. The rectifying column control method of claim 1, wherein said controlling said rectifying column to said extracted state if said current column bottom liquid level is equal to said first target column bottom liquid level and said current column bottom temperature is equal to said second target column bottom temperature comprises:
if the current tower kettle liquid level is equal to the first target tower kettle liquid level and the current tower kettle temperature is equal to the second target tower kettle temperature, stopping controlling the steam pressure and the steam regulating valve of the rectifying tower, and opening the extraction valve and timing.
5. The rectifying column control method of claim 4, wherein said target rectifying column information further comprises a second target column bottom liquid level, said second target column bottom liquid level being smaller than said first target column bottom liquid level, said stopping controlling said rectifying column's steam regulating valve and steam pressure, opening a take-off valve and timing, further comprising, after that:
and if the current tower kettle liquid level is smaller than the second target tower kettle liquid level, or the timing reaches a preset time threshold, closing the extraction valve, and controlling the rectifying tower to be in the liquid collection state or the concentration state.
6. A storage medium storing computer instructions which, when executed by a computer, are adapted to carry out all the steps of the rectifying column control method according to any one of claims 1 to 5.
7. An electronic device, comprising:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the rectification column control method of any one of claims 1-5.
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