Rectification column control method and device, electronic equipment and storage medium

Abstract

The application discloses a rectifying tower control method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring the current tower pressure of the rectifying tower; determining the pressure interval corresponding to the tower pressure; the rectifying tower comprises at least two non-overlapping pressure intervals, each pressure interval corresponds to a process parameter set, and each process parameter set comprises at least one parameter value of a process parameter; and the rectifying tower is adjusted according to the parameter value of the process parameter in the process parameter set corresponding to the pressure interval.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rectification column, and particularly to a rectification column control method and device, an electronic device and a storage medium. BACKGROUND

[0002] The low-temperature rectification process is to separate light and heavy components by using the difference in boiling points of each component of the material at a specific temperature and pressure. The low-temperature rectification separation process has multiple variables, and the multiple variables are coupled and related. When the related technology controls the rectification column, adjusting a certain parameter will cause other parameters to change, resulting in inaccurate control of the rectification column and unstable operation of the rectification column. SUMMARY

[0003] Therefore, the embodiments of the present application provide a rectification column control method and device, an electronic device and a storage medium, aiming to improve the accuracy of rectification column control.

[0004] The technical scheme of the embodiments of the present application is as follows:

[0005] In a first aspect, the embodiments of the present application provide a rectification column control method, which comprises:

[0006] Obtaining the current column pressure of the rectification column;

[0007] Determining the pressure interval corresponding to the column pressure; the rectification column comprises at least two non-overlapping pressure intervals, each pressure interval corresponds to a process parameter set, and each process parameter set comprises at least one parameter value of a process parameter;

[0008] Adjusting the rectification column according to the parameter values of the process parameters in the process parameter set corresponding to the pressure interval.

[0009] In the above scheme, the at least one process parameter comprises any one of the following:

[0010] The feed flow rate of the rectification column;

[0011] The nitrogen discharge pressure of the condensation column corresponding to the rectification column;

[0012] The heating power of the reboiler corresponding to the rectification column.

[0013] In the above scheme, the at least one process parameter comprises: the feed flow rate of the rectification column; the feed loop of the rectification column is provided with a flow meter and a first adjusting valve;

[0014] The adjusting of the rectification column according to the parameter values of the process parameters in the process parameter set corresponding to the pressure interval comprises:

[0015] determining a first opening degree of a first regulating valve corresponding to a feed flow of the rectifying tower;

[0016] adjusting the opening degree of the first regulating valve to the first opening degree to adjust the feed flow of the rectifying tower.

[0017] In the above scheme, after adjusting the opening degree of the first regulating valve, the method further comprises:

[0018] determining whether the feed flow of the rectifying tower is successfully adjusted according to the value of the flow meter.

[0019] In the above scheme, the at least one process parameter comprises a heating power of a reboiler corresponding to the rectifying tower;

[0020] The control loop of the reboiler comprises a voltage transmitter and a current transmitter, and the adjusting the rectifying tower according to the parameter value of the process parameter in the process parameter set corresponding to the pressure interval comprises:

[0021] determining a first voltage value and a first current value corresponding to the heating power of the reboiler;

[0022] adjusting the voltage value and the current value of the voltage transmitter and the current transmitter according to the first voltage value and the first current value to adjust the heating power of the reboiler.

[0023] In the above scheme, the at least one process parameter comprises a nitrogen discharge pressure of a condensing tower corresponding to the rectifying tower; a pressure sensor and a second regulating valve are arranged in a nitrogen discharge pipeline of the condensing tower;

[0024] The adjusting the rectifying tower according to the parameter value of the process parameter in the process parameter set corresponding to the pressure interval comprises:

[0025] determining a second opening degree of the second regulating valve corresponding to the nitrogen discharge pressure;

[0026] adjusting the opening degree of the second regulating valve to the second opening degree to adjust the nitrogen discharge pressure of the condensing tower corresponding to the rectifying tower.

[0027] In the above scheme, the nitrogen discharge pipeline of the condensing tower is further provided with a temperature sensor; a liquid inlet nitrogen pipeline of the condensing tower is provided with a solenoid valve; and the method further comprises:

[0028] obtaining a temperature value measured by the temperature sensor;

[0029] if the temperature value is greater than or equal to a set value, opening the solenoid valve; and if the temperature value is less than the set value, closing the solenoid valve.

[0030] In a second aspect, an embodiment of the present application provides a rectification column control device, which comprises:

[0031] an acquisition module configured to acquire a current column pressure of the rectification column;

[0032] a determination module configured to determine a pressure interval corresponding to the column pressure; the rectification column comprises at least two non-overlapping pressure intervals, each pressure interval corresponds to a set of process parameters, and each set of process parameters comprises at least one parameter value of a process parameter;

[0033] an adjustment module configured to adjust the rectification column according to the parameter value of the process parameter in the set of process parameters corresponding to the pressure interval.

[0034] In a third aspect, an embodiment of the present application provides an electronic device, which comprises a processor and a memory, and the processor and the memory are connected to each other, wherein the memory is configured to store a computer program, the computer program comprises program instructions, and the processor is configured to invoke the program instructions to execute the steps of the rectification column control method provided in the first aspect of the present application.

[0035] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, which comprises: the computer readable storage medium stores a computer program. The computer program is executed by a processor to implement the steps of the rectification column control method provided in the first aspect of the present application.

[0036] The embodiment of the present application acquires the current column pressure of the rectification column, determines the pressure interval corresponding to the column pressure, and adjusts the rectification column according to the parameter value of the process parameter in the set of process parameters corresponding to the pressure interval. The rectification column comprises at least two non-overlapping pressure intervals, each pressure interval corresponds to a set of process parameters, and each set of process parameters comprises at least one parameter value of a process parameter. The embodiment divides different column pressure intervals to configure corresponding sets of process parameters, matches the corresponding set of process parameters according to the current column pressure of the rectification column, and adjusts the rectification column. The embodiment can automatically adjust the process parameters of the rectification column according to the current column pressure, improves the accuracy of the process parameter control of the rectification column, and ensures that the rectification column can run smoothly. A series of coupling parameters do not need to be set manually, the process operation is reduced, the working efficiency of the rectification column is improved, and effective separation of the low-temperature rectification column is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is an implementation flow diagram of a rectification column control method provided by an embodiment of the present application;

[0038] Figure 2 is a structural schematic diagram of a rectification device provided by an embodiment of the present application;

[0039] Figure 3 is an implementation flowchart of another rectification column control method provided by an embodiment of the present application;

[0040] Figure 4 is an implementation flowchart of another rectification column control method provided by an embodiment of the present application;

[0041] Figure 5 is an implementation flowchart of another rectification column control method provided by an embodiment of the present application;

[0042] Figure 6 is a schematic diagram of a rectification column control device provided by an embodiment of the present application;

[0043] Figure 7 is a schematic diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of the present application.

[0045] Low-temperature rectification process is widely used in chemical, petrochemical, and oil refining production. Low-temperature rectification process separates light and heavy components by using the difference in boiling points of each component of the material at a specific temperature and pressure. A low-temperature rectification column is composed of many tower segments and is a typical distributed parameter system with many variables and complex internal mechanisms. The rectification column has a large time constant and a slow response to control action, which is a typical large time-delay system.

[0046] Low-temperature rectification separation process has multiple controlled variables and multiple manipulated variables, and is a complex control process with large hysteresis. The controlled variables include temperature, reboiler power, and tower pressure difference; the manipulated variables include overhead discharge flow and bottom discharge flow. Taking the reboiler power as an example, the manipulated variables are voltage and current. When adjusting the process parameters of the rectification column, the adjustment of one process parameter may cause changes in multiple other process parameters. Therefore, by reasonably selecting the process parameters for control, the coupling relationship of the system can be reduced, and the stable operation of the rectification column can be effectively maintained.

[0047] The related art usually only adjusts one process parameter to control the rectification column, but the change of this process parameter also causes changes in other process parameters of the rectification column, which may make the rectification column unable to operate stably.

[0048] In view of the above-mentioned problems of the prior art, the embodiments of the present application provide a rectifying tower control method, which can improve the accuracy of process parameter control of the rectifying tower. In order to illustrate the technical solutions of the present application, the following will be described by specific embodiments.

[0049] Figure 1 is a flowchart of an implementation of a rectifying tower control method provided by the embodiments of the present application. The execution subject of the rectifying tower control method is an electronic device, which includes a desktop computer, a notebook computer, a server and the like. The server can be a physical device or a virtualized device deployed in the cloud. Referring to Figure 1 , the rectifying tower control method comprises:

[0050] S101, obtaining the current column pressure of the rectifying tower.

[0051] In an embodiment, a pressure sensor is installed in the rectifying tower, and the current column pressure of the rectifying tower is obtained by acquiring the pressure value measured by the pressure sensor. Here, multiple pressure sensors can be installed to increase the accuracy of pressure measurement of the rectifying tower.

[0052] S102, determining the pressure interval corresponding to the column pressure; the rectifying tower comprises at least two non-overlapping pressure intervals, each pressure interval corresponds to a process parameter set, and each process parameter set comprises at least one parameter value of a process parameter.

[0053] In this embodiment, the column pressure is divided into multiple pressure intervals, and each pressure interval is non-overlapping. For example, the pressure interval A is less than 0.12mpa; the pressure interval B is 0.12mpa-0.15mpa; and the pressure interval C is 0.15mpa-0.18mpa.

[0054] Determine which pressure interval the current column pressure of the rectifying tower is located in. For example, if the current column pressure is 0.13mpa, it can be determined that the current column of the rectifying tower is located in the pressure interval B.

[0055] In this embodiment, a process parameter set is preset for each pressure interval, and the process parameter set comprises multiple parameter values of process parameters. The process parameter refers to the control parameter of the rectifying tower, for example, the process parameters include the feed flow of the rectifying tower, the discharge flow of the rectifying tower, the refrigeration power of the condensing tower and the heating power of the reboiler, etc.

[0056] Because the rectifying tower works at low temperature, and only under a certain pressure, the separation effect of the rectifying tower is the best, so in this embodiment, the column pressure is taken as the main control object, and by dividing different column pressure intervals, the corresponding process parameters are configured for each pressure interval, so that the complex process can be simplified, and the restriction relationship of the internal multivariable coupling of the rectifying tower is considered as little as possible.

[0057] In an embodiment, the present embodiment divides the column pressure into several pressure levels such as A, B, C, etc., divides the feed flow into three flow rates of low speed, normal and high speed, and divides the heating power of the reboiler into three levels of low power, normal and high power. When the running pressure is below A, it indicates that the column pressure is too low, and the feed flow is adjusted to high speed and the reboiler heating power is adjusted to high power. When the running pressure is between A and B, the feed flow and the reboiler heating power are adjusted to normal values. When the running pressure is between B and C, the feed flow is adjusted to low speed and the reboiler heating is adjusted to low power. When the running pressure is greater than C, the feed and the reboiler heating power are stopped.

[0058] For example, the process parameter set corresponding to the pressure interval A is {feed flow 15 L / M, reboiler heating power 1000 W}; the process parameter set corresponding to the pressure interval B is {feed flow 12 L / M, reboiler heating power 800 W}; and the process parameter set corresponding to the pressure interval C is {feed flow 10 L / M, reboiler heating power 600 W}.

[0059] The parameter values of the process parameters in the process parameter set corresponding to each pressure interval are obtained by process personnel according to experience and experiments.

[0060] S103, according to the parameter values of the process parameters in the process parameter set corresponding to the pressure interval, adjusting the distillation column.

[0061] Here, the current column pressure of the distillation column is located in which pressure interval, and the distillation column is adjusted according to the parameter values of the process parameters in the process parameter set corresponding to the pressure interval. Specifically, the parameter values of the process parameters of the distillation column are set to the parameter values of the process parameters in the process parameter set corresponding to the pressure interval.

[0062] In this way, the distillation column will operate according to the process parameters corresponding to the pressure interval, and when the current column pressure of the distillation column is too high, the column pressure can be reduced through the matching process parameters; when the current column pressure of the distillation column is too low, the column pressure can also be increased through the matching process parameters, so that the internal column pressure of the distillation column returns to normal.

[0063] Among them, the current column pressure of the distillation column can be obtained every set time interval, and the distillation column can be adjusted according to the parameter values of the process parameters corresponding to the pressure interval where the column pressure is located, which can improve the accuracy of the process parameter control of the distillation column.

[0064] This embodiment uses column pressure as the primary control object. By dividing the column into different pressure ranges, different process parameters are matched. The column operates according to the corresponding process parameter values ​​based on its current pressure range, achieving accurate control and effective separation in cryogenic distillation, ensuring stable operation. This embodiment eliminates the need for manual setting of a series of coupling parameters, automatically setting process parameter values ​​based on the current column pressure. This simplifies the complex process, reducing the need to consider internal multivariate coupling constraints, effectively minimizing process operations, and improving the column's efficiency.

[0065] This invention, in its embodiments, obtains the current pressure of the distillation column, determines the corresponding pressure range, and adjusts the distillation column according to the parameter values ​​in the process parameter set corresponding to that pressure range. The distillation column includes at least two non-overlapping pressure ranges, each pressure range corresponding to a process parameter set, and each process parameter set including the parameter value of at least one process parameter. This embodiment adjusts the distillation column by dividing it into different pressure ranges and matching the corresponding process parameter set based on the current pressure. This embodiment can automatically adjust the process parameters of the distillation column according to the current pressure, improving the accuracy of process parameter control and ensuring stable operation of the distillation column. It eliminates the need for manual setting of a series of coupling parameters, reduces process operations, improves the working efficiency of the distillation column, and achieves effective separation in low-temperature distillation.

[0066] The above embodiments are applied when the distillation column is already in steady-state operation. According to process requirements, the cryogenic distillation column can be divided into two stages: preheating and steady-state operation. The preheating stage refers to the state where the condenser begins to cool to a steady state and the distillation column begins to be fed to saturation. During this stage, no control is needed for the feed flow rate, the reboiler is not heated, and liquid nitrogen is introduced into the condenser for cooling. Once the feed rate to the distillation column reaches a certain mass, it enters the steady-state stage, where the scheme described in the above embodiments can be implemented.

[0067] like Figure 2 As shown, Figure 2 This is a schematic diagram of a distillation apparatus provided in an embodiment of the present invention. The distillation apparatus mainly includes a distillation column, a condenser, and a reboiler.

[0068] The feed material enters the distillation column through a pneumatic regulating valve, and the feed flow rate can be adjusted using both the valve and a flow meter. A condenser is installed at the top of the distillation column to condense the overhead vapor into liquid. Part of the condensate becomes the overhead product, while the remainder is returned to the top as reflux, allowing for mass transfer between the vapor and liquid phases within the column. The most commonly used condenser is a shell-and-tube heat exchanger. For small distillation columns, the condenser can be installed at the top; for larger columns, the condenser is installed separately and includes a reflux trough, with the reflux pumped to the top of the column.

[0069] The bottom of the rectifying column is provided with a reboiler, which is used to send the partially vaporized column bottom liquid back to the rectifying column, so that the contact mass transfer between the vapor and liquid phases in the column can be carried out. The reboiler of a small rectifying column has a small heat transfer area and can be directly arranged at the bottom of the column, which is commonly referred to as a distillation kettle. The reboiler of a large rectifying column has a large heat transfer area and is installed separately from the column body, and the thermosyphon type and kettle type reboilers are most commonly used. The thermosyphon type reboiler is a vertical placed tube-shell heat exchanger. The liquid is partially vaporized when passing through the tube side of the heat exchanger from bottom to top, and is heated by the heat carrier in the shell side. Its advantages are fast liquid circulation speed, good heat transfer effect, and short liquid residence time in the heater; however, the base of such a rectifying column is relatively high in order to generate the required pressure head for liquid circulation.

[0070] The condenser is cooled by liquid nitrogen, and the liquid nitrogen inlet pipeline of the condenser is provided with a solenoid valve, which can control the entry of liquid nitrogen into the condenser. The nitrogen discharge pipeline of the condenser is also provided with a temperature sensor and a regulating valve, and the regulating valve can adjust the nitrogen discharge pressure. The temperature sensor is used to monitor the nitrogen discharge temperature, so as to determine whether to open the solenoid valve of the liquid nitrogen inlet pipeline.

[0071] In an embodiment, the at least one process parameter includes any one of the following:

[0072] The feed flow rate of the rectifying column;

[0073] The nitrogen discharge pressure of the condensing column corresponding to the rectifying column;

[0074] The heating power of the reboiler corresponding to the rectifying column.

[0075] Reference Figure 3 In an embodiment, when the at least one process parameter includes the feed flow rate of the rectifying column; the feed circuit of the rectifying column is provided with a flow meter and a first regulating valve;

[0076] The adjusting the rectifying column according to the parameter values of the process parameters in the process parameter set corresponding to the pressure interval includes:

[0077] S301, determining a first opening degree of a first regulating valve corresponding to the feed flow rate of the rectifying column;

[0078] S302, adjusting the opening degree of the first regulating valve to the first opening degree, so as to adjust the feed flow rate of the rectifying column.

[0079] In the embodiment, different openings of the first regulating valve correspond to different feed flow rates, and the correspondence between the opening of the first regulating valve and the feed flow rate can be obtained through experiments in advance and stored. When the feed flow rate needs to be adjusted, the first opening of the first regulating valve corresponding to the feed flow rate is obtained, and then the opening of the first regulating valve is adjusted to the first opening, so as to adjust the feed flow rate of the rectifying tower.

[0080] After adjusting the opening of the first regulating valve, the method further comprises:

[0081] According to the value of the flow meter, it is determined whether the feed flow rate of the rectifying tower is successfully adjusted.

[0082] In actual application, the feed flow rate can be adjusted by a proportional-integral-derivative (PID) controller program, and the feed flow rate is adjusted by adjusting the opening of the first regulating valve, so as to realize PID control of the flow rate.

[0083] The first regulating valve in the embodiment corresponds to a pneumatic regulating valve in Figure 1 The feed flow rate can be adjusted by the first regulating valve and the flow meter.

[0084] Referring to Figure 4 In an embodiment, the at least one process parameter includes a heating power of a reboiler corresponding to the rectifying tower.

[0085] The control loop of the reboiler includes a voltage transmitter and a current transmitter, and the adjusting of the rectifying tower according to the parameter value of the process parameter in the process parameter set corresponding to the pressure interval comprises:

[0086] S401, determining a first voltage value and a first current value corresponding to the heating power of the reboiler;

[0087] S402, adjusting the voltage value and the current value of the voltage transmitter and the current transmitter according to the first voltage value and the first current value, so as to adjust the heating power of the reboiler.

[0088] In the embodiment, the heating power of the reboiler can be adjusted by adjusting the voltage value of the voltage transmitter and the current value of the current transmitter in the control loop of the reboiler. Different heating powers correspond to different voltage values and current values. The correspondence between the heating power and the voltage value of the voltage transmitter and the current value of the current transmitter is obtained by experiment in advance and stored. When the heating power of the reboiler needs to be adjusted, the corresponding first voltage value and first current value are obtained according to the heating power of the reboiler, the voltage value of the voltage transmitter is adjusted to the first voltage value, and the current value of the current transmitter is adjusted to the first current value, so as to adjust the heating power of the reboiler.

[0089] In actual application, the power control loop of the reboiler includes electrical elements such as a voltage transmitter, a current transmitter, and a solid-state relay. The heating power of the reboiler can be adjusted by a PID program. After the heating power is set, the PID controller outputs a PWM signal to the solid-state relay to control the voltage and current of the voltage transmitter and the current transmitter. The heating power can be calculated according to the voltage and current of the output power supply.

[0090] Reference Figure 5 In an embodiment, the at least one process parameter includes: a nitrogen discharge pressure of a condensation tower corresponding to the rectifying tower; and a pressure sensor and a second adjusting valve arranged in a nitrogen discharge pipeline of the condensation tower.

[0091] The adjusting the rectifying tower according to the parameter value of the process parameter in the process parameter set corresponding to the pressure interval includes:

[0092] S501, determining a second opening degree of the second adjusting valve corresponding to the nitrogen discharge pressure.

[0093] S502, adjusting the opening degree of the second adjusting valve to the second opening degree, so as to adjust the nitrogen discharge pressure of the condensation tower corresponding to the rectifying tower.

[0094] Because the liquid nitrogen in the condenser will vaporize due to heat absorption in the heat exchange process, if the second adjusting valve has a too small opening degree, more and more nitrogen will be discharged from the condenser, and the pressure will become higher and higher. If the second adjusting valve has a too large opening degree, the nitrogen will be quickly discharged from the condenser, and the pressure in the condenser will become smaller and smaller. The more the nitrogen in the condenser, the worse the refrigeration effect; the more the liquid nitrogen in the condenser, the better the refrigeration effect. Therefore, by adjusting the opening degree of the second adjusting valve, the nitrogen discharge pressure of the condensation tower is adjusted, and the refrigeration effect of the condenser can be controlled.

[0095] In actual application, the corresponding relationship between the nitrogen discharge pressure and the opening degree of the second regulating valve can be determined by experiment in advance to establish the PID control algorithm, and when the nitrogen discharge pressure of the condenser is adjusted, the opening degree of the second regulating valve is adjusted by the PID control algorithm to adjust the opening degree of the second regulating valve to the second opening degree, so as to adjust the nitrogen discharge pressure of the nitrogen discharge pipeline.

[0096] The second regulating valve in the embodiment corresponds to the regulating valve in the nitrogen discharge pipeline of the condenser, and the second regulating valve can adjust the nitrogen discharge pressure. Figure 2

[0097] In the above embodiment, the nitrogen discharge pipeline of the condenser is further provided with a temperature sensor, and the liquid nitrogen inlet pipeline of the condenser is provided with an electromagnetic valve; the method further comprises:

[0098] obtaining the temperature value measured by the temperature sensor;

[0099] If the temperature value is greater than or equal to the set value, the electromagnetic valve is opened; if the temperature value is less than the set value, the electromagnetic valve is closed.

[0100] The higher the temperature value of the temperature value measured by the temperature sensor, the higher the temperature of the nitrogen in the nitrogen discharge pipeline of the condenser, and when the temperature value is greater than or equal to the set value, it indicates that the liquid nitrogen in the condenser is insufficient, and the electromagnetic valve of the liquid nitrogen inlet pipeline of the condenser is opened to make the liquid nitrogen enter the condenser, so as to reduce the temperature of the discharged nitrogen and enhance the refrigeration effect of the condenser.

[0101] In an embodiment, when the tower bottom of the rectifying tower discharges, a temperature PID controller composed of a reboiler and a temperature sensor installed in the discharge circuit can be used to heat and pressurize the discharge medium, and then discharge it to the next stage equipment. When the temperature is less than the threshold value, the heating power of the reboiler is increased by the PID controller. If it is a multi-stage rectifying tower cascade, the next stage equipment is the feed of the next stage rectifying tower; if it is a single tower, the discharged product is gas.

[0102] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0103] It should be understood that when used in the present specification and the appended claims, the terms "comprise" and "include" indicate the presence of described features, whole, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, whole, steps, operations, elements, components and / or sets thereof.

[0104] It should be noted that the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.​

[0105] In addition, in the embodiments of the present application, "first", "second", and the like are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence.

[0106] Reference Figure 6 , Figure 6 is a schematic diagram of a rectification column control device provided by an embodiment of the present application, as shown in the figure, the device comprises: Figure 6

[0107] an acquisition module, configured to acquire a current column pressure of a rectification column;

[0108] a determination module, configured to determine a pressure interval corresponding to the column pressure; the rectification column comprises at least two non-overlapping pressure intervals, each pressure interval corresponds to a set of process parameters, and each set of process parameters comprises at least one parameter value of a process parameter;

[0109] an adjustment module, configured to adjust the rectification column according to the parameter value of the process parameter in the set of process parameters corresponding to the pressure interval.

[0110] In an embodiment, the at least one process parameter comprises any one of the following:

[0111] a feed flow rate of the rectification column;

[0112] a nitrogen discharge pressure of a condensation column corresponding to the rectification column;

[0113] a heating power of a reboiler corresponding to the rectification column.

[0114] In an embodiment, the at least one process parameter comprises: a feed flow rate of the rectification column; a feed loop of the rectification column is provided with a flow meter and a first adjustment valve;

[0115] The adjustment module adjusts the rectification column according to the parameter value of the process parameter in the set of process parameters corresponding to the pressure interval, comprising:

[0116] determining a first opening degree of the first adjustment valve corresponding to the feed flow rate of the rectification column;

[0117] adjusting the opening degree of the first adjustment valve to the first opening degree, so as to adjust the feed flow rate of the rectification column;

[0118] determining whether the feed flow rate of the rectification column is successfully adjusted according to the value of the flow meter.

[0119] In an embodiment, the at least one process parameter comprises: a heating power of a reboiler corresponding to the rectification column;

[0120] ​The control loop of the reboiler comprises a voltage transmitter and a current transmitter, and the adjusting module adjusts the rectifying tower according to the parameter values of the process parameters in the process parameter set corresponding to the pressure interval, including:

[0121] determining a first voltage value and a first current value corresponding to the heating power of the reboiler;

[0122] adjusting the voltage value and the current value of the voltage transmitter and the current transmitter according to the first voltage value and the first current value, so as to adjust the heating power of the reboiler.

[0123] In an embodiment, the at least one process parameter comprises a nitrogen discharge pressure of a condensing tower corresponding to the rectifying tower, and the nitrogen discharge pipeline of the condensing tower is provided with a pressure sensor and a second adjusting valve;

[0124] The adjusting module adjusts the rectifying tower according to the parameter values of the process parameters in the process parameter set corresponding to the pressure interval, including:

[0125] determining a second opening degree of the second adjusting valve corresponding to the nitrogen discharge pressure;

[0126] adjusting the opening degree of the second adjusting valve to the second opening degree, so as to adjust the nitrogen discharge pressure of the condensing tower corresponding to the rectifying tower.

[0127] In an embodiment, the nitrogen discharge pipeline of the condensing tower is further provided with a temperature sensor, and the liquid inlet nitrogen pipeline of the condensing tower is provided with a solenoid valve; the device further comprises:

[0128] a temperature acquisition module configured to acquire a temperature value measured by the temperature sensor;

[0129] a control module configured to open the solenoid valve if the temperature value is greater than or equal to a set value, and close the solenoid valve if the temperature value is less than the set value.

[0130] In actual application, the acquisition and determination module and the adjusting module can be implemented by a processor in an electronic device, such as a central processing unit (CPU), a digital signal processor (DSP), a microcontroller unit (MCU), or a field programmable gate array (FPGA).

[0131] It should be noted that the rectification tower control device provided in the above embodiment is only used for example in the division of the above modules when controlling the rectification tower. In actual application, the above processing distribution can be completed by different modules according to the needs, that is, the internal structure of the device is divided into different modules to complete all or part of the above-described processing. In addition, the rectification tower control device and the rectification tower control method provided in the above embodiment belong to the same concept, and the specific implementation process is described in the method embodiment, which will not be repeated here.

[0132] The rectification tower control device can be in the form of an image file, which can be run in the form of a container or a virtual machine after being executed to realize the rectification tower control method described in the present application. Of course, it is not limited to the form of an image file, and any software form that can realize the rectification tower control method described in the present application is within the protection scope of the present application.

[0133] Based on the hardware implementation of the above program modules, and in order to realize the method of the present application, the present application further provides an electronic device. Figure 7 The hardware structure of the electronic device of the present application is shown in Figure 7 The electronic device includes:

[0134] The communication interface can interact with other devices such as network devices and the like;

[0135] The processor is connected with the communication interface to realize information interaction with other devices, and is used to run the computer program to execute the method provided by one or more technical solutions of the electronic device. The computer program is stored on the memory.

[0136] The above electronic device can also be connected Figure 2 The condenser, reboiler, electromagnetic valve, regulating valve, flow meter, temperature sensor, pressure sensor and the like in the electronic device.

[0137] Of course, in actual application, each component in the electronic device is coupled together through a bus system. It can be understood that the bus system is used to realize the connection and communication between the components. The bus system includes a data bus, a power bus, a control bus and a state signal bus. However, in order to clearly illustrate, all kinds of buses are marked as a bus system in Figure 7 .

[0138] The electronic device described above can be in the form of a cluster, such as a cloud computing platform. A cloud computing platform is a business form that uses computing virtualization, network virtualization, and storage virtualization technology to organize multiple independent server physical hardware resources into a pooled resource. It is a structure of software-defined resources based on the development of virtualization technology, and can provide resources such as virtual machines and containers. By eliminating the fixed relationship between hardware and operating systems, relying on network connectivity to schedule unified resources, and then providing the required virtual resources and services, it is a new type of IT and software delivery mode, with characteristics such as flexibility, elasticity, distribution, multi-tenancy, and on-demand.

[0139] Current cloud computing platforms support several service modes:

[0140] SaaS (Software as a Service): Cloud computing platform users do not need to purchase software, but instead rent software deployed on the cloud computing platform. Users do not need to maintain the software, and the software service provider will fully manage and maintain the software.

[0141] PaaS (Platform as a Service): Cloud computing platform users (usually software developers) can build new applications or extend existing applications on the architecture provided by the cloud computing platform, without having to purchase development, quality control, or production servers.

[0142] IaaS (Infrastructure as a Service): Cloud computing platforms provide data centers, infrastructure hardware, and software resources over the Internet. IaaS mode cloud computing platforms can provide servers, operating systems, disk storage, databases, and / or information resources.

[0143] The memory in the embodiments of the present application is used to store various types of data to support the operation of the electronic device. Examples of these data include: any computer programs for operating on the electronic device.

[0144] It is understood that the memory can be a volatile memory or a nonvolatile memory, and can also include both volatile and nonvolatile memory. Among them, the nonvolatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a ferromagnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM). The magnetic surface memory can be a disk memory or a tape memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example and not limitation, many forms of RAM can be used, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), sync link dynamic random access memory (SLDRAM), and direct rambus random access memory (DRRAM). The memory described in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0145] The method disclosed by the embodiments of the present application can be applied to a processor or implemented by the processor. The processor can be an integrated circuit chip with a signal processing capability. In the implementation process, the steps of the above method can be completed by using an integrated logic circuit or an instruction in the form of software in the processor. The processor can be a general-purpose processor, a DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The processor can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiments of the present application, the processor can be directly implemented by a hardware coding processor, or implemented by a combination of hardware and software modules in the coding processor. The software module can be located in a storage medium, and the storage medium is located in the memory, and the processor reads the program in the memory to complete the steps of the above method in combination with the hardware.

[0146] Alternatively, the processor implements the corresponding procedures realized by the electronic device in each method of the embodiments of the present application when executing the program, and details are not described herein.

[0147] In the exemplary embodiments, the embodiments of the present application also provide a storage medium, that is, a computer storage medium, specifically a computer readable storage medium, for example, a first memory for storing a computer program, and the computer program can be executed by a processor of an electronic device to complete the steps of the above method. The computer readable storage medium can be an FRAM, a ROM, a PROM, an EPROM, an EEPROM, a Flash Memory, a magnetic surface memory, an optical disc, or a CD-ROM, etc.

[0148] In the several embodiments provided by the present application, it should be understood that the disclosed device, electronic device and method can be implemented in other manners. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed coupling, direct coupling or communication connection between the components can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0149] The units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, that is, can be located in one place, or can be distributed on multiple network units; some or all of the units can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0150] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be a separate unit, or two or more units can be integrated in one unit; the integrated unit can be realized in the form of hardware or in the form of hardware plus software functional unit.

[0151] Those skilled in the art can understand that all or part of the steps of the above-mentioned method embodiments can be completed by program instruction related hardware, and the foregoing program can be stored in a computer readable storage medium, and the program executes the steps of the above-mentioned method embodiments when executed; and the foregoing storage medium includes mobile storage equipment, ROM, RAM, magnetic disc or optical disc and various storage program codes.

[0152] Alternatively, the integrated unit of the present application can be stored in a computer readable storage medium if it is realized in the form of a software functional module and sold or used as an independent product. Based on this understanding, the technical solutions of the embodiments of the present application can be embodied in the form of a software product, which is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in the embodiments of the present application. The foregoing storage medium includes mobile storage equipment, ROM, RAM, magnetic disc or optical disc and various storage program codes.

[0153] It should be noted that the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0154] In addition, in the present application, "first", "second", etc. are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0155] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A rectifier column control method, characterized by, The method comprises: acquiring a current column pressure of a distillation column; determining a pressure interval corresponding to the column pressure; the distillation column comprises at least two non-overlapping pressure intervals, each pressure interval corresponds to a process parameter set, and each process parameter set comprises parameter values of multiple process parameters; adjusting the distillation column according to the parameter values of the process parameters in the process parameter set corresponding to the pressure interval; wherein the process parameters comprise a feed flow of the distillation column, a nitrogen discharge pressure of a condensation column corresponding to the distillation column, and a heating power of a reboiler corresponding to the distillation column; when the process parameters comprise the feed flow of the distillation column, a feed loop of the distillation column is provided with a flow meter and a first adjusting valve; the adjusting of the distillation column according to the parameter values of the process parameters in the process parameter set corresponding to the pressure interval comprises: determining a first opening degree of the first adjusting valve corresponding to the feed flow of the distillation column; and adjusting the opening degree of the first adjusting valve to the first opening degree, so as to adjust the feed flow of the distillation column; when the process parameters comprise the heating power of the reboiler corresponding to the distillation column, a control loop of the reboiler comprises a voltage transmitter and a current transmitter; the adjusting of the distillation column according to the parameter values of the process parameters in the process parameter set corresponding to the pressure interval comprises: determining a first voltage value and a first current value corresponding to the heating power of the reboiler; and adjusting the voltage value and the current value of the voltage transmitter and the current transmitter according to the first voltage value and the first current value, so as to adjust the heating power of the reboiler; when the process parameters comprise the nitrogen discharge pressure of the condensation column corresponding to the distillation column, a nitrogen discharge pipeline of the condensation column is provided with a pressure sensor and a second adjusting valve; the adjusting of the distillation column according to the parameter values of the process parameters in the process parameter set corresponding to the pressure interval comprises: determining a second opening degree of the second adjusting valve corresponding to the nitrogen discharge pressure; and adjusting the opening degree of the second adjusting valve to the second opening degree, so as to adjust the nitrogen discharge pressure of the condensation column corresponding to the distillation column.

2. The method of claim 1, wherein, After adjusting the opening degree of the first adjusting valve, the method further comprises: determining whether the feed flow of the distillation column is successfully adjusted according to the value of the flow meter.

3. The method of claim 1, wherein, The nitrogen discharge pipeline of the condensation column is further provided with a temperature sensor; a liquid inlet nitrogen pipeline of the condensation column is provided with an electromagnetic valve; the method further comprises: acquiring a temperature value measured by the temperature sensor; if the temperature value is greater than or equal to a set value, opening the electromagnetic valve; if the temperature value is less than the set value, closing the electromagnetic valve.

4. A rectifying column control device characterized by comprising: The distillation column control device is used to execute the distillation column control method in any one of claims 1 to 3, and comprises: an acquiring module, configured to acquire a current column pressure of a distillation column; a determining module, configured to determine a pressure interval corresponding to the column pressure; the distillation column comprises at least two non-overlapping pressure intervals, each pressure interval corresponds to a process parameter set, and each process parameter set comprises parameter values of multiple process parameters; an adjusting module, configured to adjust the rectifying tower according to a parameter value of a process parameter in a process parameter set corresponding to the pressure interval; wherein the process parameter comprises a feed flow of the rectifying tower, a nitrogen discharge pressure of a condensing tower corresponding to the rectifying tower, and a heating power of a reboiler corresponding to the rectifying tower.

5. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor implements the rectifying tower control method in any one of claims 1 to 3 when executing the computer program.

6. A computer readable storage medium characterized by, The computer readable storage medium stores a computer program, and the computer program comprises program instructions which, when executed by a processor, cause the processor to execute the rectifying tower control method in any one of claims 1 to 3.

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