Control method and device of absorption and desorption tower and control system of absorption and desorption tower

Abstract

The invention provides an absorption and desorption tower control method and device and an absorption and desorption tower control system. The method comprises the steps that related parameters of an absorption and desorption tower are obtained, and the related parameters comprise one or more of tower top pressure, tower top temperature, absorbent flow, rich gas flow, rich gas condensate flow, tower kettle liquid level, tower kettle temperature, feeding temperature and tower top fuel gas flow; a content generation model is constructed, the content generation model is obtained through training of multiple sets of training data, and each set of training data in the multiple sets of training data comprises historical related parameters obtained in the historical time period and historical alkane content corresponding to the historical related parameters; inputting the related parameters into a content generation model to obtain alkane contents corresponding to the related parameters; controlling the operation of the absorption and desorption tower according to the alkane content, so that the difference value between the alkane content and the target alkane content is smaller than a preset difference value. The scheme solves the problem that the stable operation of the absorption and desorption tower cannot be effectively controlled.

Description

Technical Field

[0001] The present application relates to the technical field of absorption and desorption tower operation control, and in particular, to a control method for an absorption and desorption tower, a control device for an absorption and desorption tower, a computer program product, and an absorption and desorption tower control system. Background Art

[0002] In order to achieve the recovery of light hydrocarbons in the petroleum refining process, the commonly used method is the process flow of absorption, desorption and stabilization tower. However, the current solution cannot effectively control the smooth operation of the absorption and desorption tower. Summary of the invention

[0003] The main purpose of the present application is to provide a control method for an absorption and desorption tower, a control device for an absorption and desorption tower, a computer program product and an absorption and desorption tower control system, so as to at least solve the problem in the prior art that the absorption and desorption tower cannot be effectively controlled to operate smoothly.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a control method for an absorption and stripping tower is provided, comprising: obtaining relevant parameters of the absorption and stripping tower, wherein the relevant parameters include one or more of tower top pressure, tower top temperature, absorbent flow rate, rich gas flow rate, rich gas condensate flow rate, tower bottom liquid level, tower bottom temperature, feed temperature, and tower top fuel gas flow rate; constructing a content generation model, wherein the content generation model is trained using multiple groups of training data, and each group of training data in the multiple groups of training data includes historical relevant parameters obtained within a historical time period and historical alkane contents corresponding to the historical relevant parameters; inputting the relevant parameters into the content generation model to obtain the alkane content corresponding to the relevant parameters; controlling the operation of the absorption and stripping tower according to the alkane content so that the difference between the alkane content and the target alkane content is less than a preset difference.

[0005] Optionally, the operation of the absorption and desorption tower is controlled according to the alkane content, including: obtaining a target difference between the alkane content and a standard alkane content; and adjusting the bottom temperature of the absorption and desorption tower according to the target difference, wherein the target difference and the bottom temperature are negatively correlated.

[0006] Optionally, the operation of the absorption and stripping tower is controlled according to the alkane content, including: obtaining a target difference between the alkane content and a standard alkane content; and adjusting the top pressure of the absorption and stripping tower according to the target difference, wherein the target difference and the top pressure are positively correlated.

[0007] Optionally, the operation of the absorption and desorption tower is controlled according to the alkane content, including: obtaining a target difference between the alkane content and a standard alkane content; adjusting the opening of an absorbent regulating valve of the absorption and desorption tower according to the target difference, wherein the target difference and the opening of the absorbent regulating valve are positively correlated, and the absorbent regulating valve is used to adjust the absorbent flow rate.

[0008] Optionally, controlling the operation of the absorption and desorption tower according to the alkane content includes: obtaining a first predetermined operation, wherein the first predetermined operation is an operation acting in a control device, selecting a single control parameter to control the operation of the absorption and desorption tower, the control device being used to control the operation of the absorption and desorption tower, the control parameter being the bottom temperature, the top pressure or the opening of an absorbent regulating valve; in response to the first predetermined operation, controlling the operation of the absorption and desorption tower with a selected single target control parameter; obtaining a second predetermined operation, wherein the second predetermined operation is an operation acting in the control device, selecting a plurality of the control parameters to control the operation of the absorption and desorption tower; in response to the second predetermined operation, controlling the operation of the absorption and desorption tower with a plurality of selected target control parameters.

[0009] Optionally, the operation of the absorption and stripping tower is controlled according to the alkane content, including: when the operation of the absorption and stripping tower is controlled by the tower top pressure, obtaining a target difference between the alkane content and a standard alkane content; based on the target difference, controlling the operation of the absorption and stripping tower in a priority order, wherein the priority of using the tower bottom temperature is higher than the priority of using the absorbent regulating valve.

[0010] Optionally, controlling the operation of the absorption and desorption tower according to the alkane content includes: sending the control parameters to a DCS system by means of OPC communication; and controlling the operation of the absorption and desorption tower by means of the DCS system.

[0011] According to another aspect of the present application, a control device for an absorption and stripping tower is provided, comprising: an acquisition unit, used to acquire relevant parameters of the absorption and stripping tower, wherein the relevant parameters include one or more of tower top pressure, tower top temperature, absorbent flow rate, rich gas flow rate, rich gas condensate flow rate, tower bottom liquid level, tower bottom temperature, feed temperature, and tower top fuel gas flow rate; a construction unit, used to construct a content generation model, wherein the content generation model is obtained by training using multiple groups of training data, and each group of training data in the multiple groups of training data includes historical relevant parameters obtained within a historical time period and historical alkane contents corresponding to the historical relevant parameters; a processing unit, used to input the relevant parameters into the content generation model to obtain the alkane content corresponding to the relevant parameters; and a control unit, used to control the operation of the absorption and stripping tower according to the alkane content, so that the difference between the alkane content and the target alkane content is less than a preset difference.

[0012] According to another aspect of the present application, a computer program product is provided, comprising a computer program, wherein when the computer program is executed by a processor, the steps of any one of the control methods for the absorption and desorption towers are implemented.

[0013] According to another aspect of the present application, an absorption and desorption tower control system is provided, comprising: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include a control method for executing any one of the absorption and desorption towers.

[0014] By applying the technical solution of the present application, model parameters are learned and trained through a series of relevant parameters of the absorption and desorption towers, and a content generation model is constructed. The alkane content can be predicted through the content generation model, and the operation of the absorption and desorption tower is controlled based on the alkane content as a correction coefficient to achieve full absorption and utilization of the alkane content, making the operation of the absorption and desorption tower more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 A hardware structure block diagram of a mobile terminal for executing an absorption and desorption tower control method provided in an embodiment of the present application is shown;

[0017] Figure 2 A schematic flow chart of an absorption and desorption tower control method provided according to an embodiment of the present application is shown;

[0018] Figure 3 A schematic diagram of the absorption and desorption tower process is shown;

[0019] Figure 4 A schematic diagram of the control principle is shown;

[0020] Figure 5 A schematic diagram of the tower bottom temperature control scheme is shown;

[0021] Figure 6 A schematic diagram of the tower top pressure control scheme is shown;

[0022] Figure 7 A schematic diagram of the absorbent flow control scheme is shown;

[0023] Figure 8 A structural block diagram of an absorption and desorption tower control device provided according to an embodiment of the present application is shown.

[0024] The above drawings include the following reference numerals:

[0025] 102, processor; 104, memory; 106, transmission device; 108, input and output devices. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] Specifically, in the process control of the absorption and desorption tower, we mainly focus on the tower bottom temperature, tower top pressure and absorbent flow rate. At present, the tower bottom temperature is generally controlled by extracting materials from the tower bottom for heat exchange, that is, the materials extracted from the bottom of the tower enter the heat exchanger for heat exchange with other high-temperature heat sources to achieve temperature control; while the tower top pressure is generally controlled by controlling the tower top gas extraction flow rate; the absorbent flow rate is controlled by single-loop setting based on experience. By controlling the tower bottom temperature, pressure and absorbent flow rate on site, the C3 and above components in the rich gas can be recycled.

[0030] Specifically, in the prior art, the set points of the bottom temperature and the top pressure of the absorption and stripping tower are generally set according to the indicators during the device design or according to the daily product component test results. The main disadvantages include: if the temperature and pressure set points remain unchanged, they cannot adapt to the current operating conditions. Even if they are adjusted after the component test results come out, there is a serious lag and they cannot adapt to the real-time changes in the operating conditions. When the rich gas components entering the absorption and stripping tower change, for example, when the top fuel gas components increase, it is likely to cause a large disturbance due to untimely regulation of the top pressure, further causing imbalance in the operation of the entire tower. The absorbent flow set point is fixed and cannot be adaptively adjusted when the rich gas components change. For example, when the content of C3 and above increases, the absorbent may be insufficient, resulting in the inability to completely recover light hydrocarbons above C3. When the light hydrocarbons above C3 decrease, a certain degree of waste of absorbent is caused. Each controlled variable is in an isolated control state and cannot be coordinated and controlled from the overall perspective of the operation of the absorption and stripping tower, which often results in the phenomenon of losing one thing while focusing on another.

[0031] For the convenience of description, some nouns or terms involved in the embodiments of the present application are explained below:

[0032] Absorption-desorption tower: It is a petroleum term and belongs to a type of chemical equipment. Absorption-desorption tower is a petroleum term published in 1994. It refers to equipment in which the absorption and desorption processes are carried out in the same tower. This equipment is designed to complete the absorption and desorption operations in a single device, thereby improving the efficiency and cost-effectiveness of the industrial process. The equipment in which the absorption process and the desorption process are carried out in the same tower is called an absorption-desorption tower, which is a chemical term published by the whole country in 2017. This concept expands the application scope of the absorption-desorption tower, making it not only limited to the petroleum industry, but also widely used in the chemical industry, especially in occasions where absorption and desorption operations are required at the same time. Absorption tower and desorption tower are two different equipment, but together they form the basis of absorption and desorption operations. Absorption tower is a device for realizing absorption operation, while desorption tower is a device used to separate part of the solute in the solvent through gas or steam. These two equipment play a vital role in industrial processes, especially in occasions where gas or liquid needs to be purified and valuable components need to be recovered.

[0033] As introduced in the background technology, the prior art is unable to effectively control the smooth operation of the absorption and desorption tower. To solve the above problem, the embodiments of the present application provide a control method for an absorption and desorption tower, a control device for an absorption and desorption tower, a computer program product and an absorption and desorption tower control system.

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0035] The method embodiments provided in the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 FIG. 1 is a hardware structure block diagram of a mobile terminal of a control method for an absorption and desorption tower according to an embodiment of the present invention. Figure 1 As shown, the mobile terminal may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the mobile terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0036] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the display method of device information in the embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, the above method is implemented. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The transmission device 106 is used to receive or send data via a network. The above-mentioned specific examples of the network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0037] In this embodiment, a control method for an absorption and desorption tower running on a mobile terminal, a computer terminal or a similar computing device is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0038] Figure 2 Schematic diagram of a control method for an absorption and desorption tower according to an embodiment of the present application. Figure 2 As shown, the method comprises the following steps:

[0039] Step S201, obtaining relevant parameters of the absorption and desorption tower, wherein the relevant parameters include one or more of tower top pressure, tower top temperature, absorbent flow rate, rich gas flow rate, rich gas condensate flow rate, tower bottom liquid level, tower bottom temperature, feed temperature, and tower top fuel gas flow rate;

[0040] Specifically, the above parameters are explained as follows:

[0041] Tower top pressure: refers to the pressure value at the top of the desorption tower, which is an important parameter reflecting the gas flow state and operation conditions in the tower. Generally speaking, the higher the tower top pressure, the denser the gas in the tower, and the better the absorption effect may be.

[0042] Tower top temperature: refers to the temperature at the top of the desorption tower, which affects the thermodynamic properties of the absorption process and has an important influence on the solubility and mass transfer rate of the absorbent.

[0043] Absorbent flow rate: refers to the flow rate of absorbent entering the stripping tower, which affects the distribution of the absorbent in the tower and the absorption efficiency.

[0044] Rich gas flow rate: refers to the rich gas flow rate discharged from the top of the stripping tower. The rich gas contains the absorbed components. The absorption effect can be understood by monitoring the rich gas flow rate.

[0045] Rich gas condensate flow rate: refers to the flow rate of rich gas condensed into liquid in the condenser, which is usually proportional to the rich gas flow rate.

[0046] Tower bottom liquid level: refers to the liquid level height of the liquid contained in the tower bottom at the stripping tower. Changes in liquid level may affect the distribution of liquid phase in the tower and operational stability.

[0047] Tower bottom temperature: refers to the temperature of the liquid in the tower bottom, which is usually monitored together with the tower bottom liquid level to determine the thermal equilibrium state in the tower.

[0048] Feed temperature: refers to the temperature of the raw material or waste gas entering the stripping tower, which affects the heat transfer and absorption effect of the absorbent.

[0049] Tower top fuel gas flow rate: refers to the flow rate of fuel gas used to provide heat, which affects the heating effect and operational stability of the stripping tower.

[0050] Step S202, constructing a content generation model, wherein the content generation model is obtained by training using multiple sets of training data, each set of training data in the multiple sets of training data includes historical related parameters obtained in a historical time period and historical alkane contents corresponding to the historical related parameters;

[0051] Specifically, the content generation model predicts or generates the output of alkane content based on the relevant input parameters. In order to train this model, a large amount of historical data needs to be collected as a training set. These data are organized into multiple groups, each of which contains relevant parameters (such as temperature, pressure, flow, etc.) obtained in the same historical time period and the alkane content corresponding to these parameters. The model can learn the mapping relationship from input parameters to output alkane content.

[0052] Step S203, inputting the above-mentioned related parameters into the above-mentioned content generation model to obtain the alkane content corresponding to the above-mentioned related parameters;

[0053] Specifically, when the relevant parameters are input into the content generation model, the model will perform calculations and inferences based on internal logic and rules, and output the alkane content corresponding to the relevant parameters.

[0054] Step S204, controlling the operation of the absorption and desorption tower according to the alkane content, so that the difference between the alkane content and the target alkane content is less than a preset difference.

[0055] Specifically, based on the feedback information of the alkane content, the operating parameters of the absorption and desorption tower are adjusted to improve the separation effect or adjust the alkane content. The target alkane content is an ideal value or expected value set according to the production process requirements or product quality standards. By adjusting the operating parameters of the absorption and desorption tower, the actual alkane content gradually approaches and stabilizes near the target value, while ensuring that the difference from the target value is less than a preset acceptable range (i.e., the preset difference).

[0056] Through this embodiment, through a series of relevant parameters of the absorption and desorption tower, the model parameters are learned and trained, and a content generation model is constructed. The alkane content can be predicted through the content generation model, and then the operation of the absorption and desorption tower is controlled according to the alkane content as a correction coefficient to achieve full absorption and utilization of the alkane content, making the absorption and desorption tower run more smoothly.

[0057] Specifically, in order to address the problem that components above C3 in the fuel gas at the top of the absorption and desorption tower cannot be completely absorbed or the absorption capacity is insufficient, this solution collects and processes the sampling data in the production process, establishes a soft measurement model for the C3 content in dry gas based on an artificial neural network, and inputs a series of auxiliary variables (rich gas feed flow, feed temperature, absorption tower top temperature, pressure, etc.) according to the factors that have a greater impact on the absorption effect, and conducts learning and training of the model parameters. The content of components above C3 is predicted through the neural network model, and then the controllable variables such as operating pressure, oil-gas ratio, and operating temperature are corrected according to the prediction results of the soft measurement model and the online component measurement results, so as to achieve closed-loop optimization control of the C3 content.

[0058] Specifically, the absorption and desorption tower process diagram is as follows Figure 3 As shown in the figure, the main control parameters include tower top pressure, tower top temperature, absorbent flow, rich gas flow, rich gas condensate flow, tower bottom liquid level, tower bottom temperature, etc., among which pressure is abbreviated as PI, temperature is abbreviated as TI, flow is abbreviated as FI, and liquid-gas ratio is abbreviated as LI. The main control target is to absorb the content of C3, C4, C5, and C6 on the fuel gas production pipeline at the top of the desorption tower.

[0059] Specifically, in conventional operation, since the dry gas components are unknown, the parameters can only be controlled through experience and regular manual sampling and analysis results, which makes it difficult to achieve timely control. This scheme establishes a soft measurement model for the dry gas components of the absorption and desorption tower, using neural network technology, and using parameters such as tower top pressure, tower top temperature, absorbent flow, rich gas flow, rich gas condensate flow, tower bottom liquid level, tower bottom temperature, etc. as model inputs to predict the C3, C4, C5, and C6 components in the dry gas as output. Figure 4 As shown, Figure 4 The neural network soft measurement model is the content generation model of this scheme.

[0060] Specifically, the soft sensor model results are used to correct controllable variables such as operating pressure, absorbent flow, and operating temperature. A manual selection interface can also be added to select single or combined control according to actual conditions. By controlling the dry gas components, components above C3 can be prevented from being introduced into the dry gas and burned as fuel gas, causing waste.

[0061] In the specific implementation process, the operation of the absorption and desorption tower is controlled according to the alkane content, which can be achieved through the following steps: obtaining a target difference between the alkane content and the standard alkane content; adjusting the bottom temperature of the absorption and desorption tower according to the target difference, wherein the target difference and the bottom temperature are negatively correlated.

[0062] In this scheme, the bottom temperature can be used to control the operation of the absorption and desorption tower. By accurately controlling the bottom temperature, the C2 light components in the crude naphtha can be effectively desorbed, and it is also beneficial to control the content of components above C3 in the dry gas. This can further achieve full absorption and utilization of the alkane content, and further ensure that the absorption and desorption tower operates more smoothly.

[0063] Specifically, the tower bottom temperature is controlled in cascade, and the light hydrocarbon content is used as a correction to control the heat exchange flow of the tower bottom heat source. When the content of components above C3 at the top of the tower increases, it indicates that the operating temperature is too high, and more heavy components are brought to the top of the tower. At this time, the tower bottom temperature set point needs to be lowered. The control scheme is as follows Figure 5 shown.

[0064] Specifically, this scheme includes temperature control, and the analysis data of the neural network soft measurement model is introduced into the control model. When the predicted result shows that the components above C3 in the dry gas at the top of the tower increase by 1%-3%, the tower bottom temperature is controlled to decrease by 3-5°C through the tower bottom heat source regulating valve. Accurately controlling the tower bottom temperature can effectively desorb the C2 light components in the crude naphtha, and is also conducive to controlling the content of components above C3 in the dry gas.

[0065] In some embodiments, controlling the operation of the absorption and desorption tower according to the alkane content can be achieved through the following steps: obtaining a target difference between the alkane content and the standard alkane content; adjusting the top pressure of the absorption and desorption tower according to the target difference, wherein the target difference and the top pressure are positively correlated.

[0066] In this scheme, the tower top pressure can be used to control the operation of the absorption and desorption tower. By accurately controlling the tower top pressure, it can be beneficial to improve the gas flow and mass transfer efficiency, which can further achieve full absorption and utilization of the alkane content and further ensure that the absorption and desorption tower operates more smoothly.

[0067] Specifically, the tower top pressure is controlled by the pressure series fuel gas flow rate, and the fuel gas valve is also controlled by the light hydrocarbon content. When the content of components above C3 at the top of the tower increases, it indicates that the tower top pressure is low at this time, and the fuel gas set point needs to be reduced. The control scheme is as follows Figure 6 shown.

[0068] Specifically, this solution includes pressure regulation. The pressure of the absorption and desorption tower should be properly controlled. During normal periods, it should be 0.05-0.1MPa lower than that of the stabilization tower to facilitate the improvement of gas flow and mass transfer efficiency. When the components above C3 in the dry gas at the top of the tower increase in the prediction results of the neural network soft measurement model, the control model will automatically increase the pressure of the absorption and desorption tower by about 0.1MPa.

[0069] In the specific implementation process, the operation of the absorption and desorption tower is controlled according to the alkane content, which can be achieved through the following steps: obtaining a target difference between the alkane content and the standard alkane content; adjusting the opening of the absorbent regulating valve of the absorption and desorption tower according to the target difference, wherein the target difference and the opening of the absorbent regulating valve are positively correlated, and the absorbent regulating valve is used to adjust the absorbent flow rate.

[0070] In this scheme, the opening of the absorbent regulating valve can be used to control the operation of the absorption and stripping tower. By accurately controlling the opening of the absorbent regulating valve and stabilizing the increase in the amount of absorbent, the average driving force of the absorption operation will increase, which means that components above C3 in the gas are more easily absorbed, thereby improving the absorption efficiency. This can further achieve full absorption and utilization of the alkane content, further ensuring that the absorption and stripping tower operates more smoothly.

[0071] Specifically, the absorbent flow rate is controlled by a single loop, and the light hydrocarbon content at the top of the tower is added for correction. When the content of components above C3 at the top of the tower increases, it indicates that the absorption capacity is insufficient and the flow regulating valve needs to be opened; when the content of components above C3 decreases to a certain limit value, it indicates that the absorbent flow rate is too large and there is a certain degree of waste, so the regulating valve can be appropriately closed. Control schemes such as Figure 7As shown, the absorbent may be naphtha.

[0072] Specifically, this solution also includes liquid-gas ratio control. When the liquid-gas ratio increases, the amount of stable naphtha increases, which will lead to an increase in the average driving force of the absorption operation, which means that components above C3 in the gas are more easily absorbed, thereby improving the absorption efficiency. The liquid-gas ratio in actual operation is 1.1-1.5 times the minimum liquid-gas ratio. When the components above C3 in the top dry gas in the prediction results of the neural network soft measurement model increase, the control model will automatically increase the flow rate of stable naphtha at the top of the absorption and desorption tower.

[0073] In some embodiments, controlling the operation of the absorption and desorption tower according to the alkane content can be achieved through the following steps: obtaining a first predetermined operation, wherein the first predetermined operation is an operation acting in a control device, selecting a single control parameter to control the operation of the absorption and desorption tower, the control device is used to control the operation of the absorption and desorption tower, and the control parameter is the bottom temperature, the top pressure or the opening of the absorbent regulating valve; in response to the first predetermined operation, controlling the operation of the absorption and desorption tower with a selected single target control parameter; obtaining a second predetermined operation, wherein the second predetermined operation is an operation acting in the control device, selecting a plurality of the control parameters to control the operation of the absorption and desorption tower; in response to the second predetermined operation, controlling the operation of the absorption and desorption tower with a plurality of selected target control parameters.

[0074] In this scheme, the operation of the absorption and desorption tower can be controlled by a single control parameter or by a combination of multiple control parameters. The absorption and desorption tower can be regarded as a whole for optimization control to avoid excessive operation of a single process and affect the overall efficiency. The specific selection can be made according to the actual situation. In this way, different control strategies can be implemented to make the control of the absorption and desorption tower operation more in line with the actual situation, reduce manual operation, and reduce labor intensity.

[0075] Specifically, the content setting values ​​of C3, C4, C5, and C6 alkanes (C3 is a saturated hydrocarbon compound containing three carbon atoms, C4 is a saturated hydrocarbon compound containing four carbon atoms, C5 is a saturated hydrocarbon compound containing five carbon atoms, and C6 is a saturated hydrocarbon compound containing six carbon atoms) are set on the DCS monitoring screen, and process calculations are performed based on the contents of C3, C4, C5, and C6 alkanes in the test results. The control module outputs the corrected absorption tower operating pressure, operating temperature, absorbent flow rate and other parameters, and coordinates and controls the various operating indicators of the absorption tower to achieve the final component requirements.

[0076] Specifically, this solution also includes an overall coordinated control strategy, which treats the absorption and stripping tower as a whole for optimized control to avoid excessive operation of a single process that affects the overall efficiency. According to the actual production situation, the operating parameters such as temperature, pressure and flow rate are adjusted in time to adapt to changes in raw material composition and flow rate. When the neural network soft measurement model predicts changes in the composition of the top dry gas while stably controlling the pressure of the absorption and stripping tower, the control model gives priority to adjusting the tower bottom temperature and then the liquid-vapor ratio, that is, automatically adjusting the flow rate of the absorbent-stabilized naphtha according to the top dry gas flow rate.

[0077] In the specific implementation process, the operation of the absorption and desorption tower is controlled according to the above-mentioned alkane content, which can be achieved through the following steps: when the operation of the absorption and desorption tower is controlled by the above-mentioned top pressure, the target difference between the above-mentioned alkane content and the standard alkane content is obtained; according to the above-mentioned target difference, the operation of the absorption and desorption tower is controlled in order of priority, wherein the priority of using the above-mentioned tower bottom temperature is higher than the priority of using the above-mentioned absorbent regulating valve.

[0078] In this scheme, a priority control strategy is adopted to adjust the alkane content to the target value. This strategy first considers adjusting the tower bottom temperature, because temperature changes can directly affect the separation efficiency and distribution of each component in the tower, which is a more direct and effective adjustment method. If the satisfactory adjustment effect cannot be achieved by adjusting the tower bottom temperature alone, consider using auxiliary means such as the absorbent regulating valve for fine-tuning. By accurately controlling the tower top pressure and adjusting the tower bottom temperature according to the target difference, the separation of each component in the tower can be more effectively controlled, thereby improving the purity and yield of the product. The tower bottom temperature adjustment is preferred because its effect is usually more significant and direct than adjusting the absorbent flow rate. This can reduce unnecessary absorbent consumption, reduce operating costs, and reduce energy consumption. The priority control strategy helps to avoid system fluctuations caused by large adjustments to multiple control variables at the same time, thereby improving the stability and reliability of the entire system.

[0079] Specifically, the priority order of the overall control strategy may be: tower top pressure>tower bottom temperature>absorbent regulating valve.

[0080] Specifically, this solution is suitable for reducing the content of C3-C6 in dry gas to above 6% before use and below 3% after use, thereby avoiding the loss of C3-C6 to dry gas as fuel gas, thereby correspondingly increasing the yield of liquefied petroleum gas.

[0081] Specifically, this scheme establishes a soft measurement model for C3 content in dry gas based on an artificial neural network to predict the content of components above C3. Then, based on the prediction results of the soft measurement model and the online component measurement results, the content of components above C3 in the top fuel gas is used as a correction to coordinate and control control parameters such as the top pressure, bottom temperature, and absorbent flow rate, so as to achieve more sufficient absorption and utilization of components above C3, while making the absorption and desorption tower run more smoothly.

[0082] In some embodiments, controlling the operation of the absorption and desorption tower according to the alkane content can be achieved through the following steps: using OPC communication to send the control parameters to the DCS system; using the DCS system to control the operation of the absorption and desorption tower.

[0083] In this solution, OPC is a standard based on OLE (Object Linking and Embedding) technology, designed for industrial automation control. OPC communication is used to transfer control parameters (such as tower top pressure, tower bottom temperature, absorbent flow, etc.) from the source system (such as PLC) to the DCS system. The DCS system is a highly integrated and distributed control system that can monitor and control multiple processes at the same time. By sending the control parameters to the DCS system, centralized management and optimized control of the entire process can be achieved. After receiving the control parameters, the DCS system will accurately control the operation of the absorption and desorption tower according to the preset control logic and algorithm. Connecting different systems through OPC communication improves the integration of the entire industrial automation system. The DCS system has powerful data processing and control capabilities, and can monitor and adjust control parameters in real time to ensure that the absorption and desorption tower operates in the best state.

[0084] Specifically, this solution is equipped with corresponding detection instruments and DCS system for implementing automatic control, including tower top, tower bottom temperature, tower top pressure, tower top fuel gas flow, absorbent flow, etc., and the on-site valves have a certain adjustment margin.

[0085] Specifically, this solution collects parameter signals of the DCS system to the advanced control system through OPC communication, and returns the calculated control result signal to the DCS system to achieve control.

[0086] Specifically, the advantages of this solution include: the various index parameters of the absorption and desorption tower are no longer controlled in isolation, and the top pressure, bottom temperature and absorbent flow rate are coordinated and controlled with the content of components above C3 as a unified index, which can significantly improve the recovery rate of light hydrocarbons; to a certain extent, it can offset the impact of changes in rich gas components on the smooth operation of the absorption tower, reduce the disturbance of various index parameters, thereby reducing manual operations and reducing labor intensity; the absorbent flow rate can be adjusted at any time according to the light hydrocarbon components, which to a certain extent reduces the circulation of the absorbent in the system and reduces energy loss.

[0087] The embodiment of the present application also provides a control device for an absorption and desorption tower. It should be noted that the control device for the absorption and desorption tower of the embodiment of the present application can be used to execute the control method for the absorption and desorption tower provided in the embodiment of the present application. The device is used to implement the above-mentioned embodiments and preferred implementation modes, and those that have been explained will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware for a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0088] The control device of the absorption and desorption tower provided in the embodiment of the present application is introduced below.

[0089] Figure 8 is a structural block diagram of a control device for an absorption and desorption tower according to an embodiment of the present application. Figure 8 As shown, the device comprises:

[0090] The acquisition unit 10 is used to acquire relevant parameters of the absorption and desorption tower, wherein the relevant parameters include one or more of tower top pressure, tower top temperature, absorbent flow rate, rich gas flow rate, rich gas condensate flow rate, tower bottom liquid level, tower bottom temperature, feed temperature, and tower top fuel gas flow rate;

[0091] A construction unit 20 is used to construct a content generation model, wherein the content generation model is obtained by training using multiple sets of training data, each set of training data in the multiple sets of training data includes historical related parameters obtained in a historical time period and historical alkane contents corresponding to the historical related parameters;

[0092] The processing unit 30 is used to input the above-mentioned related parameters into the above-mentioned content generation model to obtain the alkane content corresponding to the above-mentioned related parameters;

[0093] The control unit 40 is used to control the operation of the absorption and desorption tower according to the alkane content so that the difference between the alkane content and the target alkane content is less than a preset difference.

[0094] Through this embodiment, through a series of relevant parameters of the absorption and desorption tower, the model parameters are learned and trained, and a content generation model is constructed. The alkane content can be predicted through the content generation model, and then the operation of the absorption and desorption tower is controlled according to the alkane content as a correction coefficient to achieve full absorption and utilization of the alkane content, making the absorption and desorption tower run more smoothly.

[0095] During the specific implementation process, the control unit includes a first acquisition module and a first processing module. The first acquisition module is used to obtain the target difference between the above-mentioned alkane content and the standard alkane content; the first processing module is used to adjust the above-mentioned bottom temperature of the above-mentioned absorption and desorption tower according to the above-mentioned target difference, wherein the above-mentioned target difference and the above-mentioned bottom temperature are negatively correlated.

[0096] In this scheme, the bottom temperature can be used to control the operation of the absorption and desorption tower. By accurately controlling the bottom temperature, the C2 light components in the crude naphtha can be effectively desorbed, and it is also beneficial to control the content of components above C3 in the dry gas. This can further achieve full absorption and utilization of the alkane content, and further ensure that the absorption and desorption tower operates more smoothly.

[0097] In some embodiments, the control unit also includes a second acquisition module and a second processing module, the second acquisition module is used to obtain the target difference between the above-mentioned alkane content and the standard alkane content; the second processing module is used to adjust the above-mentioned top pressure of the above-mentioned absorption and desorption tower according to the above-mentioned target difference, wherein the above-mentioned target difference and the above-mentioned top pressure are positively correlated.

[0098] In this scheme, the tower top pressure can be used to control the operation of the absorption and desorption tower. By accurately controlling the tower top pressure, it can be beneficial to improve the gas flow and mass transfer efficiency, which can further achieve full absorption and utilization of the alkane content and further ensure that the absorption and desorption tower operates more smoothly.

[0099] During the specific implementation process, the control unit also includes a third acquisition module and a third processing module. The third acquisition module is used to obtain the target difference between the above-mentioned alkane content and the standard alkane content; the third processing module is used to adjust the opening of the absorbent regulating valve of the above-mentioned absorption and desorption tower according to the above-mentioned target difference, wherein the above-mentioned target difference and the opening of the above-mentioned absorbent regulating valve are positively correlated, and the above-mentioned absorbent regulating valve is used to adjust the above-mentioned absorbent flow rate.

[0100] In this scheme, the opening of the absorbent regulating valve can be used to control the operation of the absorption and stripping tower. By accurately controlling the opening of the absorbent regulating valve and stabilizing the increase in the amount of absorbent, the average driving force of the absorption operation will increase, which means that components above C3 in the gas are more easily absorbed, thereby improving the absorption efficiency. This can further achieve full absorption and utilization of the alkane content, further ensuring that the absorption and stripping tower operates more smoothly.

[0101] In some embodiments, the control unit further includes a fourth acquisition module, a first control module, a fifth acquisition module, and a second control module. The fourth acquisition module is used to acquire a first predetermined operation, wherein the first predetermined operation is an operation of acting in the control device to select a single control parameter to control the operation of the absorption and desorption tower, the control device is used to control the operation of the absorption and desorption tower, and the control parameter is the tower bottom temperature, the tower top pressure, or the opening of the absorbent regulating valve; the first control module is used to respond to the first predetermined operation and use a selected single target control parameter to control the operation of the absorption and desorption tower; the fifth acquisition module is used to acquire a second predetermined operation, wherein the second predetermined operation is an operation of acting in the control device to select a plurality of the control parameters to control the operation of the absorption and desorption tower; the second control module is used to respond to the second predetermined operation and use a plurality of selected target control parameters to control the operation of the absorption and desorption tower.

[0102] In this scheme, the operation of the absorption and desorption tower can be controlled by a single control parameter or by a combination of multiple control parameters. The absorption and desorption tower can be regarded as a whole for optimization control to avoid excessive operation of a single process and affect the overall efficiency. The specific selection can be made according to the actual situation. In this way, different control strategies can be implemented to make the control of the absorption and desorption tower operation more in line with the actual situation, reduce manual operation, and reduce labor intensity.

[0103] In the specific implementation process, the control unit also includes a sixth acquisition module and a third control module. The sixth acquisition module is used to obtain the target difference between the above alkane content and the standard alkane content when the above tower top pressure is used to control the operation of the above absorption and desorption tower; the third control module is used to control the operation of the above absorption and desorption tower according to the priority order according to the above target difference, wherein the priority of using the above tower bottom temperature is higher than the priority of using the above absorbent regulating valve.

[0104] First consider adjusting the tower bottom temperature, because temperature changes can directly affect the separation efficiency and distribution of each component in the tower, which is a more direct and effective means of adjustment. If satisfactory adjustment effect cannot be achieved by adjusting the tower bottom temperature alone, consider using auxiliary means such as absorbent regulating valves for fine-tuning. By accurately controlling the tower top pressure and preferentially adjusting the tower bottom temperature according to the target difference, the separation of each component in the tower can be more effectively controlled, thereby improving the purity and yield of the product. The tower bottom temperature adjustment is preferred because its effect is usually more significant and direct than adjusting the absorbent flow rate. This can reduce unnecessary absorbent consumption, reduce operating costs, and reduce energy consumption. The priority control strategy helps to avoid system fluctuations caused by large adjustments to multiple control variables at the same time, thereby improving the stability and reliability of the entire system.

[0105] In some embodiments, the control unit further includes a sending module and a fourth control module. The sending module is used to send the control parameters to the DCS system by means of OPC communication; the fourth control module is used to control the operation of the absorption and desorption tower by means of the DCS system.

[0106] In this solution, OPC is a standard based on OLE (Object Linking and Embedding) technology, designed for industrial automation control. OPC communication is used to transfer control parameters (such as tower top pressure, tower bottom temperature, absorbent flow, etc.) from the source system (such as PLC) to the DCS system. The DCS system is a highly integrated and distributed control system that can monitor and control multiple processes at the same time. By sending the control parameters to the DCS system, centralized management and optimized control of the entire process can be achieved. After receiving the control parameters, the DCS system will accurately control the operation of the absorption and desorption tower according to the preset control logic and algorithm. Connecting different systems through OPC communication improves the integration of the entire industrial automation system. The DCS system has powerful data processing and control capabilities, and can monitor and adjust control parameters in real time to ensure that the absorption and desorption tower operates in the best state.

[0107] The control device of the absorption and desorption tower includes a processor and a memory. The acquisition unit, construction unit, processing unit and control unit are all stored in the memory as program units, and the processor executes the program units stored in the memory to realize the corresponding functions. The modules are all located in the same processor; or, the modules are located in different processors in any combination.

[0108] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the problem that the absorption and desorption tower cannot be effectively controlled to run smoothly in the prior art can be solved by adjusting the kernel parameters.

[0109] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0110] An embodiment of the present invention provides a computer-readable storage medium, which includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute the control method of the absorption and desorption tower.

[0111] Specifically, the control method of the absorption and desorption tower includes:

[0112] Step S201, obtaining relevant parameters of the absorption and desorption tower, wherein the relevant parameters include one or more of tower top pressure, tower top temperature, absorbent flow rate, rich gas flow rate, rich gas condensate flow rate, tower bottom liquid level, tower bottom temperature, feed temperature, and tower top fuel gas flow rate;

[0113] Step S202, constructing a content generation model, wherein the content generation model is obtained by training using multiple sets of training data, each set of training data in the multiple sets of training data includes historical related parameters obtained in a historical time period and historical alkane contents corresponding to the historical related parameters;

[0114] Step S203, inputting the above-mentioned related parameters into the above-mentioned content generation model to obtain the alkane content corresponding to the above-mentioned related parameters;

[0115] Step S204, controlling the operation of the absorption and desorption tower according to the alkane content, so that the difference between the alkane content and the target alkane content is less than a preset difference.

[0116] An embodiment of the present invention provides a processor, and the processor is used to run a program, wherein the control method of the absorption and desorption tower is executed when the program is running.

[0117] Specifically, the control method of the absorption and desorption tower includes:

[0118] Step S201, obtaining relevant parameters of the absorption and desorption tower, wherein the relevant parameters include one or more of tower top pressure, tower top temperature, absorbent flow rate, rich gas flow rate, rich gas condensate flow rate, tower bottom liquid level, tower bottom temperature, feed temperature, and tower top fuel gas flow rate;

[0119] Step S202, constructing a content generation model, wherein the content generation model is obtained by training using multiple sets of training data, each set of training data in the multiple sets of training data includes historical related parameters obtained in a historical time period and historical alkane contents corresponding to the historical related parameters;

[0120] Step S203, inputting the above-mentioned related parameters into the above-mentioned content generation model to obtain the alkane content corresponding to the above-mentioned related parameters;

[0121] Step S204, controlling the operation of the absorption and desorption tower according to the alkane content, so that the difference between the alkane content and the target alkane content is less than a preset difference.

[0122] An embodiment of the present invention provides a device, the device including a processor, a memory, and a program stored in the memory and executable on the processor, and when the processor executes the program, at least the following steps are implemented:

[0123] Specifically, the control method of the absorption and desorption tower includes:

[0124] Step S201, obtaining relevant parameters of the absorption and desorption tower, wherein the relevant parameters include one or more of tower top pressure, tower top temperature, absorbent flow rate, rich gas flow rate, rich gas condensate flow rate, tower bottom liquid level, tower bottom temperature, feed temperature, and tower top fuel gas flow rate;

[0125] Step S202, constructing a content generation model, wherein the content generation model is obtained by training using multiple sets of training data, each set of training data in the multiple sets of training data includes historical related parameters obtained in a historical time period and historical alkane contents corresponding to the historical related parameters;

[0126] Step S203, inputting the above-mentioned related parameters into the above-mentioned content generation model to obtain the alkane content corresponding to the above-mentioned related parameters;

[0127] Step S204, controlling the operation of the absorption and desorption tower according to the alkane content, so that the difference between the alkane content and the target alkane content is less than a preset difference.

[0128] The devices in this article can be servers, PCs, PADs, mobile phones, etc.

[0129] A computer program product includes a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above method in each embodiment of the present application are implemented.

[0130] Specifically, the control method of the absorption and desorption tower includes:

[0131] Step S201, obtaining relevant parameters of the absorption and desorption tower, wherein the relevant parameters include one or more of tower top pressure, tower top temperature, absorbent flow rate, rich gas flow rate, rich gas condensate flow rate, tower bottom liquid level, tower bottom temperature, feed temperature, and tower top fuel gas flow rate;

[0132] Step S202, constructing a content generation model, wherein the content generation model is obtained by training using multiple sets of training data, each set of training data in the multiple sets of training data includes historical related parameters obtained in a historical time period and historical alkane contents corresponding to the historical related parameters;

[0133] Step S203, inputting the above-mentioned related parameters into the above-mentioned content generation model to obtain the alkane content corresponding to the above-mentioned related parameters;

[0134] Step S204, controlling the operation of the absorption and desorption tower according to the alkane content, so that the difference between the alkane content and the target alkane content is less than a preset difference.

[0135] An absorption and desorption tower control system includes one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the above-mentioned memory and are configured to be executed by the above-mentioned one or more processors, and the one or more programs include a control method for executing any one of the above-mentioned absorption and desorption towers.

[0136] Specifically, the control method of the absorption and desorption tower includes:

[0137] Step S201, obtaining relevant parameters of the absorption and desorption tower, wherein the relevant parameters include one or more of tower top pressure, tower top temperature, absorbent flow rate, rich gas flow rate, rich gas condensate flow rate, tower bottom liquid level, tower bottom temperature, feed temperature, and tower top fuel gas flow rate;

[0138] Step S202, constructing a content generation model, wherein the content generation model is obtained by training using multiple sets of training data, each set of training data in the multiple sets of training data includes historical related parameters obtained in a historical time period and historical alkane contents corresponding to the historical related parameters;

[0139] Step S203, inputting the above-mentioned related parameters into the above-mentioned content generation model to obtain the alkane content corresponding to the above-mentioned related parameters;

[0140] Step S204, controlling the operation of the absorption and desorption tower according to the alkane content, so that the difference between the alkane content and the target alkane content is less than a preset difference.

[0141] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0142] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0143] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0144] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0145] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0146] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0147] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0148] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0149] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0150] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0151] 1) A control method for an absorption and desorption tower of the present application is used to learn and train model parameters through a series of relevant parameters of the absorption and desorption tower, and a content generation model is constructed. The alkane content can be predicted through the content generation model, and then the operation of the absorption and desorption tower is controlled based on the alkane content as a correction coefficient to achieve full absorption and utilization of the alkane content, making the absorption and desorption tower run more smoothly.

[0152] 2) A control device for an absorption and desorption tower in the present application conducts learning and training of model parameters through a series of relevant parameters of the absorption and desorption tower, and constructs a content generation model. The alkane content can be predicted through the content generation model, and then the operation of the absorption and desorption tower is controlled based on the alkane content as a correction coefficient, so as to achieve full absorption and utilization of the alkane content and make the operation of the absorption and desorption tower more stable.

[0153] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A control method for an absorption and desorption tower, characterized in that: include: Obtaining relevant parameters of the absorption and desorption tower, wherein the relevant parameters include one or more of tower top pressure, tower top temperature, absorbent flow rate, rich gas flow rate, rich gas condensate flow rate, tower bottom liquid level, tower bottom temperature, feed temperature, and tower top fuel gas flow rate; Constructing a content generation model, wherein the content generation model is obtained by training using multiple sets of training data, each set of training data in the multiple sets of training data includes historical related parameters obtained within a historical time period and historical alkane contents corresponding to the historical related parameters; Inputting the relevant parameters into the content generation model to obtain the alkane content corresponding to the relevant parameters; The operation of the absorption and desorption tower is controlled according to the alkane content so that the difference between the alkane content and the target alkane content is less than a preset difference.

2. The method according to claim 1, characterized in that Controlling the operation of the absorption and desorption tower according to the alkane content includes: Obtaining a target difference between the alkane content and a standard alkane content; The bottom temperature of the absorption and desorption tower is adjusted according to the target difference, wherein the target difference and the bottom temperature are negatively correlated.

3. The method according to claim 1, characterized in that Controlling the operation of the absorption and desorption tower according to the alkane content includes: Obtaining a target difference between the alkane content and a standard alkane content; The tower top pressure of the absorption and desorption tower is adjusted according to the target difference, wherein the target difference and the tower top pressure are positively correlated.

4. The method according to claim 1, characterized in that: Controlling the operation of the absorption and desorption tower according to the alkane content includes: Obtaining a target difference between the alkane content and a standard alkane content; According to the target difference, the opening of the absorbent regulating valve of the absorption and desorption tower is adjusted, wherein the target difference and the opening of the absorbent regulating valve are positively correlated, and the absorbent regulating valve is used to adjust the absorbent flow rate.

5. The method according to claim 1, characterized in that Controlling the operation of the absorption and desorption tower according to the alkane content includes: Obtaining a first predetermined operation, wherein the first predetermined operation is an operation acting in a control device to select a single control parameter to control the operation of the absorption and desorption tower, the control device is used to control the operation of the absorption and desorption tower, and the control parameter is the tower bottom temperature, the tower top pressure, or the opening of the absorbent regulating valve; In response to the first predetermined operation, the absorption and desorption tower is controlled to operate using a selected single target control parameter; Obtaining a second predetermined operation, wherein the second predetermined operation is an operation of acting in the control device to select and adopt a plurality of the control parameters to control the operation of the absorption and desorption tower; In response to the second predetermined operation, the operation of the absorption and desorption tower is controlled by using a plurality of selected target control parameters.

6. The method according to claim 5, characterized in that Controlling the operation of the absorption and desorption tower according to the alkane content includes: Under the condition that the tower top pressure is used to control the operation of the absorption and desorption tower, obtaining a target difference between the alkane content and a standard alkane content; According to the target difference, the operation of the absorption and desorption tower is controlled in a priority order, wherein the priority of adopting the tower bottom temperature is higher than the priority of adopting the absorbent regulating valve.

7. The method according to claim 5, characterized in that Controlling the operation of the absorption and desorption tower according to the alkane content includes: The control parameters are sent to the DCS system by means of OPC communication; The DCS system is used to control the operation of the absorption and desorption tower.

8. A control device for an absorption and desorption tower, characterized in that: include: An acquisition unit, used to acquire relevant parameters of the absorption and desorption tower, wherein the relevant parameters include one or more of tower top pressure, tower top temperature, absorbent flow, rich gas flow, rich gas condensate flow, tower bottom liquid level, tower bottom temperature, feed temperature, and tower top fuel gas flow; A construction unit, used for constructing a content generation model, wherein the content generation model is obtained by training using multiple sets of training data, each set of training data in the multiple sets of training data includes historical related parameters obtained in a historical time period and historical alkane contents corresponding to the historical related parameters; A processing unit, used for inputting the relevant parameters into the content generation model to obtain the alkane content corresponding to the relevant parameters; A control unit is used to control the operation of the absorption and desorption tower according to the alkane content so that the difference between the alkane content and the target alkane content is less than a preset difference.

9. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the control method of the absorption and desorption tower described in any one of claims 1 to 7 are implemented.

10. An absorption and desorption tower control system, characterized in that: include: One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include a control method for executing the absorption and desorption tower described in any one of claims 1 to 7.

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