CN115945027A - Adsorption tower adsorption self-adaptive adjustment method and system - Google Patents

Adsorption tower adsorption self-adaptive adjustment method and system Download PDF

Info

Publication number
CN115945027A
CN115945027A CN202211624893.8A CN202211624893A CN115945027A CN 115945027 A CN115945027 A CN 115945027A CN 202211624893 A CN202211624893 A CN 202211624893A CN 115945027 A CN115945027 A CN 115945027A
Authority
CN
China
Prior art keywords
adsorption
gas
opening
pressure
opening degree
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202211624893.8A
Other languages
Chinese (zh)
Other versions
CN115945027B (en
Inventor
朱杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wujiang Jianchun Petrochemical Machinery Co ltd
Original Assignee
Wujiang Jianchun Petrochemical Machinery Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wujiang Jianchun Petrochemical Machinery Co ltd filed Critical Wujiang Jianchun Petrochemical Machinery Co ltd
Priority to CN202211624893.8A priority Critical patent/CN115945027B/en
Publication of CN115945027A publication Critical patent/CN115945027A/en
Application granted granted Critical
Publication of CN115945027B publication Critical patent/CN115945027B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Separation Of Gases By Adsorption (AREA)

Abstract

The embodiment of the specification provides an adsorption self-adaptive adjusting system of an adsorption tower, which comprises at least two adsorption towers, a connecting pipeline, a control valve and a controller; each adsorption tower comprises a gas inlet and a gas outlet, and the gas inlet is connected with a gas inlet pipeline of the adsorption tower; the gas outlet is connected with a gas outlet pipeline of the adsorption tower; the air inlet and the air outlet are honeycomb-shaped; the connecting pipeline comprises a first connecting pipeline and a second connecting pipeline, and the first connecting pipeline is used for connecting the air inlet pipelines of the two adsorption towers; the second connecting pipeline is used for connecting the air outlet pipelines of the two adsorption towers; the control valve is arranged in the connecting pipeline and is used for adjusting the gas pressure and/or the flushing flow rate in each adsorption tower; the controller is used for: determining a target opening of the control valve based on gas related data in each adsorption tower, wherein the gas related data comprises gas pressure data and gas flow rate data; and adjusting the opening of the control valve based on the target opening.

Description

Adsorption tower adsorption self-adaptive adjustment method and system
Technical Field
The specification relates to the technical field of adsorption tower adjustment, in particular to an adsorption tower adsorption self-adaptive adjustment method and system.
Background
In industrial production, adsorption towers play an important role in gas separation, filtration, purification and the like, especially, exhaust gas generated in industrial production contains dust, particulate matters, harmful gases and the like, which cause pollution to the atmosphere and the environment, and the regulation of operating parameters (such as pressure, gas flow, flow rate and the like) of adsorption towers is very important.
In the actual production of the adsorption tower, the adsorption tower can be reasonably adjusted only by comprehensively considering the influence of multiple factors such as the treatment (such as adsorption and desorption) pressure, temperature, gas condition and the like in each link of the adsorption process in the production process. However, the gas conditions such as the type, the composition, the impurities and the like of the gas are greatly different, multiple factors such as pressure, temperature, gas flow rate and the like in the production process can fluctuate to different degrees, various factors also have mutual influence, and different adsorption towers also need to work cooperatively under the condition of fully considering various factors. Therefore, the adjustment of the adsorption tower in the production is a laborious and time-consuming matter, and improper adjustment can have adverse effect on the working effect of the adsorption tower and even seriously affect the production.
Therefore, the adsorption tower adsorption self-adaptive adjustment method and system can realize automatic and intelligent self-adaptive adjustment of each processing link of the adsorption tower adsorption process, reduce the cost of manpower, material resources and time, and simultaneously enable the process parameters adjusted in the adsorption tower adsorption process to be more accurate.
Disclosure of Invention
One of the embodiments of the present specification provides an adsorption tower adsorption adaptive regulation system, which includes at least two adsorption towers, a connecting pipeline, a control valve and a controller; each adsorption tower comprises a gas inlet and a gas outlet, and the gas inlet is connected with a gas inlet pipeline of the adsorption tower; the air outlet is connected with an air outlet pipeline of the adsorption tower; the air inlet and the air outlet are honeycomb-shaped; the connecting pipeline comprises a first connecting pipeline and a second connecting pipeline, and the first connecting pipeline is used for connecting the air inlet pipelines of the two adsorption towers; the second connecting pipeline is used for connecting the gas outlet pipelines of the two adsorption towers; the control valve is arranged in the connecting pipeline and is used for adjusting the gas pressure and/or the flushing flow rate in each adsorption tower; the controller is configured to: determining a target opening of the control valve based on gas related data within each of the adsorption columns, wherein the gas related data includes gas pressure data and gas flow rate data; and adjusting the opening degree of the control valve based on the target opening degree.
One of the embodiments of the present specification provides a method for adjusting an adsorption tower adsorption adaptive adjustment system, where the adsorption tower adsorption adaptive adjustment system includes at least two adsorption towers, a connection pipeline, a control valve, and a controller, and the method is executed by the controller, and the method includes: determining a target opening of the control valve based on gas related data within each of the adsorption columns, wherein the gas related data includes gas pressure data and gas flow rate data; and adjusting the opening degree of the control valve based on the target opening degree.
One of the embodiments of the present specification provides a computer-readable storage medium, where the storage medium stores computer instructions, and when the computer reads the computer instructions, the computer executes the foregoing method for adjusting an adsorption adaptive adjustment system of an adsorption tower.
Drawings
The present description will be further explained by way of exemplary embodiments, which will be described in detail by way of the accompanying drawings. These embodiments are not intended to be limiting, and in these embodiments like numerals refer to like structures, wherein:
FIG. 1 is an exemplary schematic diagram of an adsorption column adsorption adaptive tuning system according to some embodiments herein;
FIG. 2 is an exemplary flow chart of a method of adjusting a control valve according to some embodiments described herein;
FIG. 3 is an exemplary flow chart of a method of determining a target opening of a control valve according to some embodiments described herein;
FIG. 4 is a flow chart illustrating an exemplary method of determining a target opening for a control valve in accordance with certain embodiments of the present disclosure;
FIG. 5 is an exemplary diagram of a pressure rate of change prediction model in accordance with some embodiments described herein;
FIG. 6 is an exemplary schematic diagram of a flush model, shown in accordance with some embodiments herein;
fig. 7 is an exemplary flow chart of a method of controlling a pneumatic safety valve according to some embodiments shown herein.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present specification, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only examples or embodiments of the present description, and that for a person skilled in the art, the present description can also be applied to other similar scenarios on the basis of these drawings without inventive effort. Unless otherwise apparent from the context, or stated otherwise, like reference numbers in the figures refer to the same structure or operation.
It should be understood that "system," "device," "unit," and/or "module" as used herein is a method for distinguishing between different components, elements, parts, portions, or assemblies of different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.
The terms "a," "an," "the," and/or "the" are not intended to refer to the singular, but may include the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.
Flow charts are used in this description to illustrate operations performed by a system according to embodiments of the present description. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the various steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to the processes, or a certain step or several steps of operations may be removed from the processes.
FIG. 1 is an exemplary schematic diagram of an adsorption adaptive conditioning system for an adsorption column according to some embodiments herein. The adsorption column adsorption adaptive control system according to the embodiment of the present specification will be described in detail below. It should be noted that the following examples are only for explaining the present specification, and do not constitute a limitation to the present specification.
In some embodiments, the adsorption column adsorption adaptive conditioning system 100 (hereinafter referred to as system 100) may include at least two adsorption columns, connecting piping, control valves, and a controller.
The adsorption tower can treat the gas and/or the fixed particles discharged by the industry, and further purify and separate the gas discharged by the industry. Different types of adsorbents may be disposed in the adsorption tower. For example, the adsorbent may be an organic adsorbent (e.g., activated carbon adsorbent, carbonized resin), an inorganic adsorbent (e.g., silica gel, aluminum chloride), or the like.
The adsorption process of the adsorption tower can comprise a plurality of preset treatment links. For example, the adsorption process may include adsorption treatment, desorption treatment, and the like, wherein the desorption treatment may further include pressure equalization, forward discharge, reverse discharge, vacuum pumping/flushing, pressure equalization, final charging, and the like. The adsorption tower can perform adsorption treatment on different types of gases through different types of adsorbents. For example, the adsorption column may perform adsorption treatment of organic waste gas, odor, and the like in the raw material gas discharged industrially by an activated carbon adsorbent to purify the raw material gas; meanwhile, the adsorbent may be regenerated through the desorption process so that the adsorbent is subjected to the next adsorption process.
In some embodiments, the system 100 may include two or more numbers of adsorption columns. The multiple adsorption towers can independently or cooperatively work in each treatment link of the adsorption process according to production requirements (such as adsorption treatment efficiency, adsorbent regeneration utilization rate and production safety), process parameters (such as temperature, pressure and gas flow rate) configuration and the like. For example, in the adsorption treatment link, a single adsorption tower can be operated independently; an adsorption tower in the sequential process may be operated in conjunction with an adsorption tower in the rinse process.
The adsorption tower comprises an air inlet and an air outlet which are respectively connected with an air inlet pipeline and an air outlet pipeline. In some embodiments, the gas inlet and the gas outlet of the adsorption tower may be honeycomb-shaped, and the interior may include several sub-ducts. For example, the honeycomb-shaped air inlet and/or outlet may comprise a plurality of identical and evenly distributed sub-ducts, which merge at the air inlet duct.
In some embodiments, the sub-pipes in the honeycomb-shaped gas inlet and/or outlet of the adsorption tower may further include a pneumatic safety valve for performing an opening or closing process according to the gas pressure and/or gas flow rate in the adsorption tower, so as to adjust the gas pressure or gas flow rate in the adsorption tower. For example, the pneumatic safety valve may preset an opening pressure value according to an actual demand, and when the pressure value of the sub-pipeline provided with the pneumatic safety valve is greater than the preset opening pressure value, the pneumatic safety valve is opened; and when the pressure value of the sub-pipeline is reduced to be below the preset pressure value, closing the pneumatic safety valve. In some embodiments, the pneumatic safety valve may also be automatically opened or closed according to a preset opening pressure. In some embodiments, the number of pneumatic safety valves provided in the aforesaid sub-ducts may be configured according to production needs, for example, in proportion (e.g. 20%) to the total number of sub-ducts in the inlet and/or outlet.
The connection pipe may be used to connect adjacent two of the at least two adsorption columns. For example, the connecting pipeline may connect the gas outlet pipelines of the two adsorption towers through the first connecting pipeline, or connect the gas inlet pipelines of the two adsorption towers through the second connecting pipeline, thereby realizing the connection between the two adsorption towers.
In some embodiments, a plurality of juxtaposed subducts may be provided in the connecting duct. For example, the connecting duct may comprise a first sub-duct and a second sub-duct arranged side by side. Wherein the first subduct and the second subduct may be two identical ducts. In some embodiments, the connecting duct may have a plurality of different segments (e.g. 3 segments) with side-by-side sub-ducts disposed in the middle segment thereof and two other segments without sub-ducts.
A control valve is a device that can be used to control the passage of gas in a connecting duct. The control valve can control the flow of the gas in the connecting pipeline through different valve opening degrees, and then can adjust the pressure value or the gas flow speed in the adsorption tower or the connecting pipeline. Wherein the opening degree of the control valve may be a value in the interval of [0, 1]. For example, an opening of 0 indicates that the control valve is in a closed state; an opening of 1 indicates a fully open state, and an opening of 0.5 indicates a half open state.
In some embodiments, the control valve may comprise a plurality of different types of valves. For example, the control valve may include a switching valve, a regulating valve, and the like. In some embodiments, in the section of the connecting pipe where the sub-pipe is not provided, a switching valve may be provided for controlling whether the connecting pipe allows gas to flow, which may be configured to have only a completely closed state or a completely open state. The regulating valve can have any one of the opening degrees [0,1], and can regulate the flow of gas in the connecting pipeline.
In some embodiments, the regulating valve may be provided in a sub-pipe juxtaposed within the connecting pipe. For example, the regulating valve may include a first regulating valve corresponding to a first sub-pipeline and a second regulating valve corresponding to a second sub-pipeline in the connecting pipeline, and the first regulating valve and the second regulating valve are respectively used for regulating the gas flow of the first sub-pipeline and the second sub-pipeline. In some embodiments, the control valve may be one or a combination of a switching valve and a regulating valve, and the number of the control valves may be configured according to actual needs of production. This is not a limitation in the present specification.
In some embodiments, the control valve may be responsive to a valve command from the controller to effect the adjustment of the opening. For example, in response to a valve command with an opening of 0.4 sent by the controller, the control valve may be adjusted from the current opening (e.g., 0.8) to the opening of 0.4.
In some embodiments, the system 100 may further include a pressure acquisition device for acquiring real-time gas pressure data within the adsorption column. As shown in FIG. 1, the pressure collecting means may include a pressure collecting means 130-1 in the adsorption column 110-1, and a pressure collecting means 130-2 in the adsorption column 110-2. It is understood that the number of the pressure-collecting devices may correspond to the number of the adsorption columns.
It should be noted that the pressure acquisition device may be placed in a suitable location in the system 100 according to actual production requirements. For example, the pressure collecting device may be disposed in the gas outlet pipe or the gas inlet pipe of the adsorption tower, or may be disposed on both sides of a control valve (such as a switch valve or an adjustment valve) in the connection pipe, or the like.
In some embodiments, the system 100 may further include a flow rate detection device for obtaining a real-time gas flow rate in the adsorption tower. As shown in FIG. 1, the flow rate detection means may include a flow rate detection means 140-1 in the adsorption tower 110-1, and a flow rate detection means 140-2 in the adsorption tower 110-2. It is to be understood that the number of the flow rate detection means may correspond to the number of the adsorption towers.
It should be noted that the flow rate detection device can be placed at a suitable location in the system 100 according to actual production requirements. For example, the flow rate detection device may be disposed on the gas outlet pipe or the gas inlet pipe of the adsorption tower, or may be disposed on both sides of a control valve (a switching valve, a regulating valve) in the connection pipe, or the like.
The system 100 also includes a controller 150 that may be used to process data and/or information obtained from other components of the system 100 or other information sources. For example, the controller 150 may obtain data regarding the gas in each adsorption column. For example, the controller 150 may obtain the pressure value of each pressure collecting device to obtain the real-time pressure condition in the corresponding adsorption tower, and may also obtain the gas flow rate value of each flow rate detecting device to obtain the real-time flow rate condition in the corresponding adsorption tower. The controller 150 may also obtain other information during production, such as user demand information (e.g., pressure change rate requirements, gas flow rate requirements), information about the adsorption column (e.g., information about the adsorption column itself, information about the adsorbent in the adsorption column), the specifications of the pipeline (e.g., material, diameter, wall thickness of the pipeline), etc.
The controller 150 may also execute control instructions (e.g., program instructions) to perform one or more of the functions described herein. For example, the controller may adjust the opening of one or more control valves based on valve control commands. The valve control command may include information about the control valve (e.g., identification or number of the control valve, etc.) to control or adjust the specific control valve. For example, for the adjustment control valve, the controller may adjust the first adjustment valve to be closed or fully opened, or may adjust the opening degree of the second adjustment valve to any opening degree (e.g. 0.5) from 0 (closed) to 1 (fully opened). In some embodiments, the controller may control the on-off valve of the second connection pipeline to be in a closed state, and may control the on-off valve of the first connection pipeline to be in an open state and adjust the opening degree of one or more adjusting valves of the first connection pipeline, so as to implement independent or cooperative operation of the plurality of adsorption towers in the adsorption process. It can be understood that the opening, closing, opening degree adjustment and the like of different control valves (such as a switch valve and an adjusting valve) can be combined in each processing link of different adsorption processes to meet the actual production needs.
Some embodiments of the present description can implement, through the system 100, automatic and intelligent adjustment of the opening of the control valve in each production link of the adsorption tower according to the relevant data of the gas in the adsorption tower, so as to implement adaptive adjustment of the system 100.
It should be noted that the adsorption column adsorption adaptive conditioning system 100 is provided for illustrative purposes only and is not intended to limit the scope of this specification. It will be apparent to those skilled in the art that various modifications and variations can be made in light of the description herein. For example, the adsorption column adsorption adaptive conditioning system 100 may include other suitable component or components to achieve similar or different functions. However, variations and modifications may be made without departing from the scope of the present description.
FIG. 2 is an exemplary flow chart of a method of adjusting a control valve according to some embodiments described herein.
In some embodiments, the process 200 may be performed by a controller. As shown in fig. 2, the process 200 includes the following steps:
and step 210, determining a target opening of the control valve based on gas related data in each adsorption tower, wherein the gas related data comprises gas pressure data and gas flow rate data.
The gas related data may refer to information about gas in each of the at least two adsorption columns. The gas related data may include information on the type of gas, the composition of the gas, etc. For example, the gas may be a mixed gas that includes a plurality of different types of impurities, organic chemical components, and the like. In some embodiments, the gas related data may include gas pressure data, gas flow rate data, etc. in the adsorption column.
The gas related data can be obtained according to production scenes and various monitoring devices. For example, the type, composition, etc. of the feed gas may be determined according to the production scenario; pressure data, gas flow rate data and the like can be acquired through the pressure acquisition device and the flow rate detection device.
The target opening may refer to the opening of the control valve required in satisfying the adsorption process, wherein the opening may be used to characterize the degree to which the control valve is opened. The opening degree can be expressed by a numerical value in the interval of [0, 1]. Illustratively, 0 indicates that the control valve is fully closed, 1 indicates fully open, and 0.5 indicates half open. The target opening degree may also be expressed in various other preset forms. For example, the opening degree of the control valve may be mapped to a value (e.g., 5) or a percentage (e.g., 50%) of the [0, 10] interval. Reference is made to fig. 1 and its description for the relevant aspects of the adsorption process and control valves.
The target opening degree may be an opening degree of one or a combination of control valves of the plurality of control valves. For example, the target opening degree may be a combination of opening degrees of two parallel regulator valves in a connecting pipe of the outlet pipe. For example, the opening degree of the first regulating valve is 0.4, and the opening degree of the second regulating valve is 0.8. In some embodiments, the target opening degree may be represented by a vector (a, b), wherein elements a, b of the vector represent the opening degree of the first regulating valve and the opening degree of the second regulating valve, respectively. For example, the target opening degree formed by combining the opening degrees of the aforementioned first and second regulator valves may be represented by a vector (0.4, 0.8).
In some embodiments, the target opening may be preset based on production requirements or production experience. For example, a process time sequence table may be set according to different adsorption process flows, and corresponding target opening degrees may be preset for different processing links. The controller can obtain corresponding target opening from the process time sequence table according to information such as processing starting time points, processing duration and the like of all adsorption process processing links, and generates a valve instruction based on the target opening to adjust the opening of the corresponding control valve.
In some embodiments, the controller may analyze actual conditions in the adsorption tower in the adsorption process to determine a target opening degree, thereby implementing adaptive adjustment of the control valve. For example, the controller may determine the target opening degree according to a processing link of an adsorption process in which the adsorption tower is located, a real-time gas pressure condition in the adsorption tower, a gas flow rate condition, and the like.
In some embodiments, the controller may determine the target opening degree according to a condition of a pressure change rate in the adsorption tower such that the pressure change rate is controlled within a preset range. See fig. 3 and its description for more.
In some embodiments, the controller may further determine the target opening degree according to a relationship between a real-time gas flow rate of the adsorption tower and a preset gas flow rate threshold range, so that the real-time gas flow rate is within the preset flow rate range. See figure 4 and description for more.
Step 220, adjusting the opening of the control valve based on the target opening.
In some embodiments, the controller may generate a target valve command to adjust the corresponding control valve based on the target opening. For example, the controller may adjust the opening degree of the first regulator valve to 0.4 and the opening degree of the second regulator valve to 0.8 by the target valve command, respectively, according to the target opening degrees (0.4, 0.8).
Some embodiments of the present description determine the target opening of the control valve according to the real-time situation of the gas in the adsorption tower in each processing link of the adsorption process and the cooperative requirements of adsorption processing and desorption processing between different adsorption towers, and can implement adaptive adjustment to meet the accurate control of the pressure change rate and the gas flow rate.
FIG. 3 is an exemplary flow chart of a method of determining a target opening of a control valve according to some embodiments described herein.
In some embodiments, the process 300 may be performed by a controller. As shown in fig. 3, the process 300 includes the following steps:
and 310, acquiring real-time pressure data of each adsorption tower through a pressure acquisition device.
The real-time pressure data may include pressure data within the adsorption column at a point in time within a preset time period. The controller can acquire the pressure values of the adsorption tower at different time points in a preset time period based on a preset time step (such as 5 s) and generate a pressure value sequence. The preset time period may be the duration of each processing link in the adsorption process, for example, 30min for the adsorption processing, 20min for the desorption processing, and the like.
In some embodiments, the real-time pressure data may also include real-time pressure data between two connected adsorption columns. For example, for an adsorption column in a sequential process train and an adsorption column coupled thereto in a rinse process train, the real-time pressure data may include the real-time pressure differential between the two adsorption columns at the same time.
The controller can acquire real-time pressure data of the corresponding adsorption tower through a pressure acquisition device arranged in the adsorption tower.
And 320, determining a first opening corresponding to the first regulating valve and/or a second opening corresponding to the second regulating valve in the target opening based on the real-time pressure data and the preset pressure change rate.
The relevant contents regarding the target opening degree refer to fig. 2 and the description thereof.
The first opening degree may indicate a target opening degree for the first regulator valve. The second opening degree may indicate a target opening degree for the second regulator valve. The first opening degree and the second opening degree at different time points may be different opening degree values, and the first opening degree and the second opening degree may be a combination of a plurality of different opening degree values.
The pressure change rate may be indicative of the magnitude of change in the gas pressure in the adsorption column per unit time or within a preset time period. The rate of change of pressure may have a direction. For example, the rate of change of pressure may be 0.8MPa/min, i.e. representing an increase of 0.8MPa per minute; 50KPa/s represents a 50KPa reduction per second.
The preset pressure change rate may refer to a pressure change rate determined according to actual production demand. In different adsorption process treatment links, the pressure requirements are different, and in the process of adjusting the current pressure to the target pressure, the uniform change of the pressure is beneficial to the safe and stable operation of production.
In some embodiments, the controller may determine a real-time pressure change rate of each adsorption column over a preset time period based on the real-time pressure data, and adjust the first opening and/or the second opening in response to a difference between the real-time pressure change rate and the preset pressure change rate being greater than a first preset threshold.
The real-time pressure change rate may refer to the rate of change of the actual pressure over a period of time elapsed since the current time. For example, by the time of the past 1 minute to the present time, the pressure in the adsorption column decreases from 1.6MPa to 0.8MPa, and the real-time pressure change rate is-0.8 MPa/min.
The controller may adjust the first opening and/or the second opening according to a relationship between the real-time pressure change rate and a preset pressure change rate, so that the real-time pressure change rate is maintained within a fluctuation range in which the preset pressure change rate meets production requirements.
The first predetermined threshold may be used to characterize whether the deviation of the real-time rate of pressure change from the predetermined rate of pressure change meets production requirements. Which can be set manually based on production experience. For example, the first predetermined threshold may be 0.01MPa/min. It will be appreciated that the real-time pressure change rate fluctuates within a suitable range of the preset pressure change rate to facilitate the performance of the adsorption process.
In some embodiments, the controller may obtain a difference between the real-time pressure change rate and a preset pressure change rate, and when the difference is greater than a first preset threshold, the controller may adjust the first opening degree and/or the second opening degree. For example, a reference table of the current pressure change rate, the target opening degree, and the target pressure change rate may be set in advance, wherein the target opening degree in the reference table may include the opening degree of the first regulator valve and the opening degree of the second regulator valve, for example, (0.4,0.8). The controller may obtain a current pressure change rate, match a target opening degree corresponding to the current pressure change rate and a target pressure change rate (i.e., a preset pressure change rate) in the reference table, and adjust the opening degree of the first regulating valve and/or the second regulating valve based on the target opening degree.
In some embodiments, the controller may also determine the first opening and/or the second opening in real time based on a pressure rate of change prediction model. See fig. 4 and its description for more.
Some embodiments of the present disclosure determine the target opening degree according to a relationship between a real-time pressure change rate and a preset pressure change rate, which is helpful for maintaining the pressure change rate of the adsorption tower at a proper level, avoiding a safety problem (e.g., damage to the adsorbent) caused by a too fast pressure change, and avoiding an efficiency problem (e.g., low efficiency of the adsorbent to adsorb the gas) of the adsorption process caused by a too slow pressure change.
The controller may also determine the target opening degree according to a failure state of the first regulating valve or the second regulating valve.
In some embodiments, in response to a failure of one of the trim valves, the controller may lock the opening of the failed trim valve to the current opening and adjust the opening of the other trim valve. Details of how to determine the fault state of the regulating valve are described below.
The failure may include various types of failures, for example, the opening of the regulating valve cannot be adjusted due to reasons such as aging, rusting, and being stuck, and the like, and the regulating valve cannot respond to a control command. A malfunctioning regulator valve may be referred to as a malfunctioning valve. At this time, the controller may lock the opening degree of the failed valve (e.g., the first regulator valve) to the current opening degree (i.e., the first opening degree is not set), and regulate the opening degree of another regulator valve (e.g., the second regulator valve) by controlling the valve command.
For example, when the first regulating valve fails, the controller may use the current opening of the first regulating valve as the first opening, obtain a second opening corresponding to the second regulating valve according to a production requirement (e.g., a requirement on a pressure change rate in the adsorption column) in the adsorption process and the first opening, and then generate a target valve command by using the first opening and the second opening as target openings, or generate a valve command for the second opening alone to regulate the opening of the second regulating valve.
It can be understood that the opening of the plurality of regulating valves can be used for cooperatively regulating the real-time conditions (such as the pressure change rate) of each treatment link of the adsorption tower process. When a regulating valve fails and the failed valve cannot be maintained or replaced in time, the controller needs to adaptively adjust the opening of other regulating valves according to the current opening of the failed valve (for example, the opening is used as the target opening of the failed valve) to meet the production requirement.
In some embodiments of the present description, by providing the first regulating valve and the second regulating valve which are independent, it is helpful to ensure normal operation of the adsorption process of the adsorption tower to the maximum extent when one of the regulating valves fails, and it is avoided that the production is affected after the failure of the single regulating valve.
In some embodiments, the controller may troubleshoot the control valve based on a rate of change of pressure within the adsorption column and an adjustment of the opening of the control valve, wherein the troubleshooting may include a number of failed valves and a particular failed control valve.
In some embodiments, the controller may determine the fault condition of the regulating valve based on the real-time pressure change rate of the adsorption column and a pressure change rate prediction value (hereinafter may be simply referred to as a prediction value). For example, after the opening degree of the first regulating valve and/or the second regulating valve is regulated, the real-time pressure change rate is greatly different from the predicted value. It may be preliminarily determined that the opening degree adjustment of the first and/or second regulator valves is not effective and the first and/or second regulator valves are malfunctioning. Wherein the predicted value can be determined based on a pressure change rate prediction model, and the relevant content of the pressure change rate prediction model is shown in fig. 5 and the description thereof.
In some embodiments, in response to a first difference value between the real-time pressure change rate and the predicted value of each adsorption tower being greater than a second preset threshold value, the controller may set a plurality of sets of valve opening degrees to the regulating valve, each set of valve opening degrees including a first opening degree and a second opening degree; wherein the first opening degree and the second opening degree in each group of valve opening degrees are opposite in direction. For example, the opening degree of the first regulating valve is in the opening direction, and the opening degree of the second regulating valve is in the closing direction.
It is understood that the controller may obtain a predicted pressure change rate value corresponding to the current target opening degree based on the current target opening degree. In the process of adjusting the target opening degree, the controller cannot respond to the adjustment of the controller when the adjusting valve fails, so that the actual pressure change rate and the predicted value have a large difference, and one or more of the adjusting valves can be judged to have a failure.
The first difference value may refer to a deviation value of an actual pressure change rate from a predicted value at the current target opening, and may be used to indicate whether the regulating valve has a fault. A larger deviation value indicates a greater probability of the regulating valve failing.
The second predetermined threshold may be used to characterize the magnitude of the deviation of the first difference value. Which may be preset empirically. For example, 0.5MPa/min. When the first difference value is greater than a second preset threshold value, it can be characterized that at least one of the regulating valves is in fault.
In some embodiments, in response to the first difference value being greater than the second preset threshold value, the controller may set a plurality of sets of valve openings of the regulating valve to troubleshoot the regulating valve, wherein the regulating directions of the first opening and the second opening in each set of valve openings are opposite.
For example, the current damper opening is (0.5 ) and the multi-group damper opening may be (0.4, 06), (0.3, 0.7), (0.2, 0.8), etc. The controller may set each of the aforementioned plural sets of the opening degrees of the regulating valves to the first regulating valve and the second regulating valve, respectively, in accordance with a time-series rule (e.g., with 20s as one time step). And respectively obtaining the real-time pressure change rate under each group of valve openings and the pressure change rate predicted value under each group of valve openings, thereby obtaining a plurality of second difference values of the real-time pressure change rate and the predicted value of the pressure change rate under each group of valve openings. Illustratively, the aforementioned sets of valve opening degrees (0.4, 06), (0.3, 0.7), (0.2, 0.8) correspond to 3 second difference values.
The second difference value can be used for representing the difference value between the real-time pressure change rate and the predicted value when the fault is eliminated through the opening of a plurality of groups of regulating valves, and the plurality of second difference values obtained under the opening of each group of regulating valves can represent the confidence degree (credibility degree) of the fault of the regulating valves.
In some embodiments, the controller may perform troubleshooting on the adjustment valve based on steps S1 to S3 as follows:
in step S1, in response to that there is no change or a small change between the plurality of second difference values, the controller may determine that both the first regulating valve and the second regulating valve are faulty. It can be understood that, under a plurality of different sets of valve opening degrees, the second difference value is not changed, which indicates that the opening degrees of the regulating valves are not successfully regulated, i.e. the first regulating valve and the second regulating valve are in a fault state.
And S2, responding to the gradual increase of the second difference value, resetting the opening degrees of the plurality of groups of valves, and exchanging the opening degree change directions of the first regulating valve and the second regulating valve. The controller may obtain a real-time pressure change rate and a second difference value at each of the reset plurality of valve openings. When the opening of the valves in different groups is changed by the second difference value, the opening of at least one regulating valve is changed under the regulation of the controller, and the change direction of the opening of the first regulating valve and the second regulating valve is exchanged, so that the following steps can be further determined: whether the regulating valve with the changed opening degree is completely regulated according to the valve command of the controller (namely, a completely normal state).
And S3, responding to the fact that the second difference value is gradually reduced to be the same as the predicted value, and determining that one regulating valve is in fault and the other regulating valve is normal.
It can be understood that, in the process that the second difference value in step S2 becomes larger and the second difference value in step S3 is the same as the predicted value, it can be indicated that the adjustment of the opening of one of the adjustment valves is effective in real time according to the valve command of the controller. At this time, the controller may obtain the valve opening corresponding to the real-time pressure change rate that is the same as the predicted value. And the real-time pressure change rate is the same as the predicted value, and the opening degrees of the group of valves comprise the current opening degree of the normal valve and the current opening degree of the fault valve. For example, the opening of the group of valves is (0.3, 0.7), and the failed valve may be a first regulating valve corresponding to 0.3 or a second regulating valve corresponding to 0.7. In other words, the first regulator valve may be stuck at a position having an opening degree of 0.3, and the second regulator valve may be stuck at a position having an opening degree of 0.7. The controller may perform subsequent troubleshooting of the particular failed valve based on the opening being 0.3 or 0.7. See description below for details.
Some embodiments of the present disclosure adjust the regulating valves by setting a plurality of groups of regulating valve openings, and based on a deviation relationship between a real-time pressure change rate of each group of regulating valve openings and a predicted value, the number of faulty valves can be determined, and a current opening value of the faulty valves can be determined, so as to implement subsequent further determination of specific faulty valves.
In some embodiments, the controller may further determine the specific failed regulating valve after determining that the number of failed valves is one and the current opening degree of the failed valves (referred to as the failure opening degree herein) based on the foregoing step S3.
In response to one of the regulating valves being a failed valve and the other regulating valve being a normal valve, the controller may further set a plurality of sets of valve opening degrees based on the current valve opening degree (the valve opening degree determined in step S3), wherein one of the valve opening degrees of each of the further sets of valve opening degrees is fixed to the failed valve opening degree, and the opening degree of the other regulating valve is continuously adjusted in the same direction. For example, the opening of the other regulating valve may be gradually increased (opened) based on a preset opening step (e.g., 0.1).
If the second difference value between the actual pressure change rate and the predicted value of the adsorption tower is gradually increased under the opening degrees of the additionally arranged groups of valves, the regulating valve with the fixed opening degree is a fault valve, and the valve with the changed opening degree is a normal valve; otherwise, the regulating valve with the changed opening degree is a fault valve, and the regulating valve with the fixed opening degree is a normal valve.
For example, the first regulating valve is fixed at the fault opening (0.3 in the aforementioned step S3), and the opening of the second regulating valve is adjusted through multiple rounds, for example, the opening of the second regulating valve is adjusted to: first round 0.4, second round 0.5, third round 0.6, etc. If the second difference value is not changed (or is changed very little), the opening degree of the second regulating valve is not effective, the second regulating valve is a fault valve at the moment, and the current opening degree of the second regulating valve is the fault opening degree (such as 0.7), namely the second regulating valve is clamped at the position with the opening degree of 0.7; otherwise, if the change of the second difference value is gradually increased, it indicates that the opening adjustment of the second regulating valve is effective, at this time, the second regulating valve is a normal valve, the first regulating valve is a fault valve, and the opening is the aforementioned fault opening (for example, 0.3).
It should be noted that to determine the confidence level of a failed valve, the controller may determine whether the first regulator valve or the second valve is a failed valve based on multiple rounds of troubleshooting. For example, the first round may assume that the first regulating valve is a failed valve, and the opening degree of the first regulating valve is the failed opening degree (e.g., 0.3 or 0.7) of the step S3, or assume that the second regulating valve is a failed valve, and the opening degree of the second regulating valve may also be the failed opening degree (e.g., 0.3 or 0.7) of the step S3. And verifying the fault state of the first regulating valve or the second regulating valve through multiple rounds of investigation.
In some embodiments of the present description, by fixing one of the regulating valves and adjusting the opening of the other regulating valve, based on the deviation between the real-time pressure change rate and the predicted value, a specific faulty valve or a normal valve can be determined, and meanwhile, based on fixing one of the regulating valves as the faulty opening, the result of troubleshooting can be facilitated to be more targeted.
In some embodiments, the controller may fix the opening degree of the failed valve to the failed opening degree after determining the failed valve, and re-determine the opening degree of the normal valve based on the failed opening degree and the pressure change rate prediction model, thereby determining the target opening degree. With reference to the foregoing step S3, as an example only, based on that the first regulating valve determined in the foregoing step S3 is a failed valve, and the failed opening degree of the first regulating valve (e.g. 0.3), the controller may regard the opening degree of the failed valve as the first opening degree, and obtain the second opening degree corresponding to the second regulating valve according to the pressure change rate prediction model. Further, the second regulator valve can be adjusted by using the failure opening degree and the second opening degree as target opening degrees. For example only, the controller may generate a valve command corresponding to the second regulating valve based on the second opening degree to regulate the second regulating valve alone, since the opening degree of the failed valve cannot be regulated. See fig. 5 for relevant contents of the pressure rate of change prediction model.
It can be understood that, for a failed regulating valve, when a certain regulating valve cannot be regulated by regulating another regulating valve, the target opening degree which meets the production requirement (such as the pressure change rate) can still be obtained to the maximum extent through the normal regulating valve, so as to maintain the normal operation of the adsorption process.
In some embodiments of the present description, the opening degrees of the first regulating valve and the second regulating valve are adjusted according to real-time pressure data of the adsorption tower, so that the adsorption tower can be adaptively adjusted in each processing link of the adsorption process, and meanwhile, the first regulating valve and the second regulating valve can work in cooperation, thereby ensuring the effectiveness of adaptive adjustment to the maximum extent.
Fig. 4 is a flowchart illustrating an example method for determining a target opening of a control valve according to some embodiments of the present disclosure.
In some embodiments, the process 400 may be performed by a controller. As shown in fig. 4, the process 400 includes the following steps:
in some embodiments, the target opening degree is further related to a real-time purge flow rate of gas in the adsorption column, and the controller may determine the opening degree of the first regulating valve and/or the second regulating valve according to the real-time purge flow rate.
And step 410, acquiring the real-time flushing flow rate of each adsorption tower through a flow rate detection device.
The real-time purge flow rate may refer to the current purge rate of gas in the adsorption column. Which may be the gas flow rate of the flushing process in the desorption process. It should be noted that the flushing process may enable regeneration of the adsorbent in the adsorption column. The controller can obtain the real-time washing flow rate through the flow rate detection device. For the related contents of the flow rate detection device, refer to fig. 1 and the description thereof.
And step 420, determining a first opening corresponding to the first regulating valve and/or a second opening corresponding to the second regulating valve in the target opening based on the real-time flushing flow rate and the preset flushing flow rate threshold range.
The preset purge flow threshold range may refer to a range of gas flow rates that meet production requirements, which may be preset based on production experience. The preset purge flow rate threshold range may be set according to different types of adsorbents, and the composition (e.g., impurity components) of the gas to be treated. Wherein the preset flush flow rate threshold range includes a minimum flush flow rate threshold and a maximum flush flow rate threshold.
In some embodiments, the preset irrigation flow rate threshold range may be determined according to an irrigation model. See figure 6 and its description for the contents of the flush model.
In some embodiments, the controller may determine the target opening based on a relationship between the real-time rinse flow rate and a preset rinse flow rate threshold range. The relevant contents about the target opening degree refer to fig. 2 and the description thereof.
In response to the real-time flush flow rate being greater than the maximum flush threshold, the controller may determine a first adjustment magnitude based on a difference between the real-time flush flow rate and the maximum flush threshold, and determine a corresponding target gas flow rate value based on the first adjustment magnitude. The controller may perform a reduction process on a current opening degree of a control valve (e.g., the first regulating valve and/or the second regulating valve) based on the target gas flow rate, and adjust the current opening degree to a target opening degree corresponding to the target gas flow rate.
It should be noted that the first adjustment magnitude may be greater than the difference between the real-time irrigation flow rate and the maximum irrigation threshold. For convenience of description, the preset irrigation flow rate threshold range is only exemplified here, for example, the preset irrigation flow rate threshold range is [10, 20], the current real-time irrigation flow rate is 25, and the difference between the real-time irrigation flow rate and the maximum irrigation threshold is 25-20=5. The first modulation amplitude may be 6 and the target gas flow rate 25-6=19. The controller may perform the reducing process on the opening degree of the control valve based on the opening degree of the control valve corresponding to the target gas flow rate as a target opening degree.
In response to that the real-time purge flow rate is smaller than the minimum purge threshold, the controller may determine a second adjustment amplitude value based on a difference between the real-time purge flow rate and the minimum purge threshold, and determine a corresponding target gas flow rate based on the second adjustment amplitude, and the controller may perform an increase process on the current opening of the control valve based on the target gas flow rate to adjust to a target opening corresponding to the target gas flow rate.
The first adjustment magnitude may refer to a value that down-regulates the real-time flush flow rate. The method can represent the difference value between the target flushing flow rate after down regulation and the current real-time flushing flow rate. In some embodiments, the controller may determine the target irrigation flow rate based on the first adjustment magnitude such that the target irrigation flow rate is within a preset irrigation flow rate threshold range.
The second adjustment magnitude may refer to a value that adjusts the real-time flush flow rate upward. The difference value between the adjusted target flushing flow rate and the current real-time flushing flow rate can be represented. In some embodiments, the controller may determine the target irrigation flow rate based on the second adjustment magnitude such that the target irrigation flow rate is within a preset irrigation flow rate threshold range.
The controller may determine a target opening degree corresponding to the target rinsing flow rate based on the target rinsing flow rate after the down-regulation or the up-regulation. In some embodiments, the controller may determine the target flushing flow rate by the first adjustment amplitude or the second adjustment amplitude when the real-time flushing flow rate exceeds a preset flushing flow rate threshold range (e.g., is greater than a maximum flushing threshold or is less than a minimum flushing threshold) based on a preset relation table of the flushing flow rate and the target opening, acquire the target opening corresponding to the target flushing flow rate from the relation table based on the retrieval matching, and adjust the opening of the first regulating valve and/or the second regulating valve by a valve instruction.
In some embodiments, the first and second magnitudes of adjustment are also related to a preset rate of pressure change.
In some embodiments, after determining the target flow rate and the target opening degree corresponding to the target flow rate based on the first adjustment amplitude and/or the second adjustment amplitude, the controller may analyze the target opening degree through a pressure change rate prediction model to obtain a predicted value of the pressure change rate, and when the predicted value is smaller than a first preset threshold, the target opening degree may be used as a final target opening degree, and adjust the first regulating valve and/or the second regulating valve according to the target opening degree, otherwise, the first adjustment amplitude or the second adjustment amplitude may be gradually increased (e.g., accumulated based on the same values) through multiple rounds of iterations to obtain a new target flow rate and a corresponding target opening degree thereof, and until the predicted value of the corresponding pressure change rate at the new target opening degree is smaller than the first preset threshold, the final target opening degree is obtained.
The relevant contents about the first preset threshold value refer to fig. 3 and the description thereof. See fig. 5 for relevant contents of the pressure change rate prediction model.
In some embodiments of the present description, when the target opening degree is determined by the real-time flushing flow rate and the preset flushing flow rate range threshold, the pressure change rate is considered to be within a proper range, so that the uniformity of the pressure change can be fully considered in the determined target opening degree, and the normal operation of production can be better ensured.
Some embodiments of this description, through the real-time velocity of flow data that washes of adsorption tower, adjust the aperture of first adjusting valve and second adjusting valve, can adjust in each processing link of adsorption process to the adsorption tower in a self-adaptation way, simultaneously, based on the preset real-time velocity of flow that washes under the target aperture is adjusted, can protect the adsorbent better, improve the performance of adsorbent simultaneously.
FIG. 5 is an exemplary diagram of a pressure rate of change prediction model in accordance with some embodiments described herein.
In some embodiments, the adsorption tower includes an adsorption process and a desorption process, and the target opening degree may include a target adsorption opening degree at the time of the adsorption process and a target desorption opening degree at the time of the desorption process. The controller may determine the corresponding target opening degree based on a production demand of the adsorption process and/or the desorption process.
The target adsorption opening degree may refer to an opening degree of a control valve that satisfies a pressure change rate requirement when the adsorption tower performs adsorption treatment. In some embodiments, the adsorption tower may be configured to adjust the gas pressure to a predetermined pressure value during the adsorption process according to the production requirements (e.g., pressure requirements of the adsorbent) of the adsorption process, so as to optimize the adsorbent effect. It can be understood that, in different processes, the pressure requirements are different, and when the adsorption tower performs the adsorption treatment cycle, the controller can adjust the opening of the control valve to increase or decrease the value of the gas pressure in the adsorption tower to the preset adsorption pressure value. During the real-time pressure value increasing or decreasing process, the controller can adjust the control valve through different target adsorption opening degrees at a plurality of moments so as to maintain the pressure to be uniformly changed.
The target desorption opening degree may refer to an opening degree of a control valve that satisfies a pressure change rate requirement when the adsorption tower performs the desorption process. In some embodiments, when the adsorption tower performs the desorption process, the gas pressure needs to be reduced to a preset desorption pressure value according to the production requirement (for example) of the desorption process, so that the adsorbent releases the adsorbate (such as organic chemical substance and dust), thereby achieving the best effect of adsorbent regeneration. During the real-time gas pressure reduction process, the controller can adjust the control valve through different target desorption opening degrees at a plurality of moments so as to maintain the uniform pressure change.
In some embodiments, the controller may obtain a preset pressure change rate, the preset pressure change rate comprising an adsorption pressure change rate corresponding to an adsorption process and a desorption pressure change rate corresponding to a desorption process. Here, the adsorption pressure change rate and the desorption pressure change rate may be obtained based on production experience, and may be values manually set, for example.
In some embodiments, the controller may process the pressure difference of the connected adsorption columns, the opening of the control valve, the feed gas data, the pipeline data, and the adsorption column data based on the pressure change rate prediction model to determine the pressure change rate corresponding to different target openings.
The pressure change rate prediction model may refer to a model for predicting a pressure change rate in the adsorption column. In some embodiments, the pressure rate of change prediction model may be a trained machine learning model. For example, the pressure change rate prediction model may include any one or combination of a Recurrent Neural Network (RNN), a Long Short Term Memory (LSTM) model, a Deep Neural Network (DNN) model, or other customized model structures.
In some embodiments, the inputs to the pressure change rate prediction model include a pressure difference across the connected adsorption columns, the first opening and the second opening, feed gas data, pipeline data, adsorption column data, and the output pressure change rate is processed by the pressure change rate prediction model.
The pressure differential across the connected adsorption columns may be determined based on real-time pressure data. See fig. 2 and its description for relevant content regarding pressure data.
The first and second opening degrees may be a combination of the corresponding first opening degree of the first regulator valve and the corresponding second opening degree of the second regulator valve. Which may be a representation of a vector (a, b). Reference is made to fig. 2 and its description regarding the first opening angle and the second opening angle.
The feed gas data may include information on the type, composition and content or concentration of the feed gas.
The pipe data includes information on the material, diameter, wall thickness, etc. of the connecting pipe.
The adsorption tower data may include information on the type, height, volume, etc. of the adsorption tower. The adsorber data may also include information about the adsorbent (e.g., type, amount of adsorbent).
As shown in fig. 5, the controller may input the pressure difference 511, the first opening degree and the second opening degree 512, the feed gas data 513, the piping data 514, and the adsorption tower data 515 of the consecutive adsorption towers to the pressure change rate prediction model 520, and output the pressure change rate based on the processing of the pressure change rate prediction model 520.
In some embodiments, the pressure change rate prediction model may be obtained by training a plurality of sets of first training samples with first labels. Each set of first training samples may include sample pressure difference, sample first and second opening, sample feed gas data, sample pipeline data, and sample adsorption column data for the connected adsorption columns. Wherein the plurality of sets of first training samples may be obtained based on historical production data. For example, the aforementioned first training sample is obtained from historical production data over the past half year, 1 month. The first label may be a pressure change rate corresponding to each set of the first training samples. For example, the first label may be determined according to an actual pressure change rate of each set of first training sample data in the historical production within a corresponding historical time period. The first label can be labeled based on manual mode and the like.
In training the initial pressure rate of change prediction model, the controller may input a first training sample per set of samples to the pressure rate of change prediction model. The pressure change rate is output through the processing of the pressure change rate prediction model. The controller may construct a loss function based on the first label and the output of the pressure change rate prediction model, and iteratively update parameters of the pressure change rate prediction model based on the loss function until a preset condition is met and training is completed, so as to obtain a trained pressure change rate prediction model. The preset condition may be that the loss function is less than a threshold, convergence, or that the training period reaches a threshold.
In some embodiments, the controller determines the target opening degree corresponding to a preset pressure change rate according to a pressure change rate prediction model. For example, the controller may determine a plurality of pressure change rates (predicted values) based on a pressure change rate prediction model by setting preset pressure change rates for each process stage in the adsorption process according to different production requirements (e.g., type of adsorbent, pressure requirements). In actual production, the controller may use the first opening degree and the second opening degree corresponding to the predicted value closest to the preset pressure change rate as a target opening degree, and then adjust the corresponding first regulating valve and/or second regulating valve in each processing link in the adsorption process based on the target opening degree.
In some embodiments, the first opening and the second opening of the pressure rate of change prediction model input may be set to be evenly distributed based on the same difference. For example, the first opening may be a value in a sequence of opening degrees that increases according to the same opening step, illustratively, the opening step is 0.05, and then the first opening may be 0.05, 0.1, 0.15, 0.2, etc., and the second opening is the same. Accordingly, the first opening degree and the second opening degree may be vectors formed by combining the first opening degree value and the second opening degree value. It should be noted that, the opening step is only exemplary, the opening step of the first opening and the opening step of the second opening may be the same or different, and the value of the opening step may also be determined accurately according to the control of the regulating valve.
It can be understood that first aperture and second aperture set up to be based on the same difference evenly distributed, help training the richness of sample, simultaneously, can be so that the aperture of governing valve has certain regularity, promote the smoothness of governing valve's aperture regulation.
In some embodiments of the present description, a pressure change rate prediction model may be used to obtain a corresponding target opening degree in combination with a production requirement for uniform change of pressure, and adaptive adjustment of an adjustment valve may be performed based on the target opening degree.
FIG. 6 is an exemplary schematic diagram of a flush model according to some embodiments herein.
In some embodiments, the controller may determine the flush flow rate threshold range based on the flush model. The input of the flushing model comprises material information of the adsorbent, information of gas to be treated and a plurality of groups of flushing flow rates, and flushing results corresponding to the plurality of groups of flushing flow rates are output. Wherein, the flushing model is a machine learning model, and the flushing result comprises the damage of the adsorbent and the complete regeneration of the adsorbent.
The purge model may refer to a model for determining a threshold range of a purge flow rate of gas within the adsorption column. In some embodiments, the washing model may be a trained machine learning model. For example, the irrigation model may include any one or combination of a Recurrent Neural Network (RNN), long short term memory neural network (LSTM) model, deep Neural Network (DNN) model, or other customized model structure.
In some embodiments, the inputs to the flush model include material information for the sorbent, gas to be treated information, a plurality of sets of flush flow rates, and the flush results are output based on the processing of the flush model.
The material information of the adsorbent may include a type of the adsorbent. For example, activated carbon type.
The gas to be treated may be a certain mixed gas. The information of the gas to be processed comprises the type and the component of the gas to be processed. For example, the information on the gas to be processed may include the type, content, concentration, or the like of impurities.
The plurality of sets of rinse flow rates may be a combination of a plurality of rinse flow rates. The number of sets of flush flow rates may be one set or a preset number (e.g., 5 sets), which may be expressed in the form of a vector, for example, a vector (S) 1 ，S 2 ，S 3 ，S 4 ，S 5 ) 5 different flushing flow rates S1, S2, S3, S4, S5 can be represented.
In some embodiments, multiple sets of flush flow rates may be obtained based on historical data. It should be noted that the plurality of sets of purge flow rates may include a plurality of different adsorbents in the historical data, a plurality of different minimum purge flow rates and a maximum purge flow rate for different gases to be treated. For example, the plurality of sets of flushing flow rates may be a combination of a plurality of minimum flushing flow rates, or a combination of a plurality of maximum flushing flow rates.
In some embodiments, the plurality of sets of flow rates may be a minimum flow rate in the historical data for a particular adsorbent and a particular gas to be treated, and a plurality of flow rate values adjusted up or down based on a predetermined flow rate step (e.g., 0.1) based on the minimum flow rate. Illustratively, the minimum flow rate is 10, and the plurality of sets of flow rates may be (9.8, 9.9, 10, 10.1, 10.2); similarly, the plurality of sets of flow rates may also be a maximum flow rate (e.g. 20) in the historical data, and a plurality of flow rate values adjusted up and down based on a preset flow rate step (e.g. 0.1) based on the maximum flow rate, e.g. (19.8, 19.9, 20, 20.1, 20.2). And a plurality of sets of flow rate values corresponding to the minimum flow rate value and the maximum flow rate value are based on the flow rate values.
The flushing results include sorbent damage and complete regeneration of the sorbent, which can be represented by 0 and 1, with 0 representing either a damaged or incompletely regenerated sorbent and 1 representing a completely regenerated sorbent. The flush result may be determined based on the actual result of the adsorbent during production (e.g., after the flush treatment of the desorption treatment). For example, the sorbent may be evaluated based on its appearance, color, etc. to determine whether it is damaged or completely regenerated.
The flush result may correspond to each flush result for each of the plurality of sets of flush flow rates. Which may be represented in the form of a vector. E.g. the aforementioned sets of irrigation flow rates (S) 1 ，S 2 ，S 3 ，S 4 ，S 5 ) The flush result may then be a vector (R) 1 ，R 2 ，R 3 ，R 4 ，R 5 ) Wherein R is 1 ，R 2 ，R 3 ，R 4 ，R 5 Respectively corresponding to the flushing flow rate S 1 ，S 2 ，S 3 ，S 4 ，S 5 The result of the washing of (1). Exemplary, flush resultsMay be (0, 1).
As shown in fig. 6, the controller may input the material information 611 of the adsorbent, the gas to be treated information 612, and the plurality of sets of rinse flow rates 613 to the rinse model 620, and output a rinse result 630 based on the processing of the rinse model 620.
In some embodiments, through the washing model, the controller may obtain a plurality of washing results corresponding to a plurality of sets (e.g., a preset number n is 5) of flow rate values, and determine m sets (m is less than or equal to n) of flow rate values corresponding to a complete regeneration of the adsorbent (the washing result is 1), and the controller may further determine a minimum value or a maximum value of the m sets of flow rate values based on a sorting (e.g., descending or ascending) method, and use the minimum value as a minimum washing flow rate threshold value in the washing flow rate threshold range, and use the maximum value as a maximum washing flow rate threshold value in the washing flow rate threshold range.
Illustratively, for a certain adsorbent and gas to be treated, multiple sets of flow rate values (9.8, 9.9, 10, 10.1, 10.2) are obtained, where 10 is the minimum value in the historical data. With the rinse model, a rinse result of (1, 1) is obtained, and then the rinse result is a number of sets of flow rate values for complete regeneration of the adsorbent (rinse result of 1) of 9.8,9.9, 10, 10.1, 10.2, with a minimum value of 9.8, and 9.8 being the minimum rinse flow rate threshold in the rinse flow rate threshold range.
Similarly, the flow rate values of the plurality of groups are (19.8, 19.9, 20, 20.1, 20.2), wherein 20 is the maximum value in the historical data, and the washing result is (1, 0) obtained by the washing model, the flush result is that the sets of flow rate values corresponding to the complete regeneration of the adsorbent (flush result is 1) are 19.8, 19.9, 20, 20.1, the maximum value of which is 20.1, and 20.1 is the maximum flush flow rate threshold value in the flush flow rate threshold range. Based on the above procedure, a flushing flow rate threshold range of [9.8, 20.1] can be obtained. It should be noted that the controller may determine the minimum and maximum flush flow rate thresholds through multiple passes of processing based on the flush model. For example, in the foregoing example, since the minimum value of 9.8 corresponds to the flushing result that the adsorbent is completely regenerated, the flow rate value smaller than 9.8 may be continuously obtained in a preset flow rate step (e.g., 0.1) for the next processing, and thus a smaller minimum flushing flow rate threshold may be obtained, so that the boundary value (e.g., the minimum flushing flow rate threshold) of the flushing flow rate threshold range is more accurate.
In some embodiments, the washing model may be obtained by training a plurality of sets of second training samples with second labels. Each set of second training samples may include material information of the sample adsorbent, sample gas to be processed information, and sets of sample rinse flow rates. Wherein the plurality of sets of second training samples may be obtained based on historical production data. For example, from historical data of the flushing process, multiple sets of second training samples are obtained. The second label may be a washing result corresponding to each set of the second training samples. For example, the second label may be determined according to the result of whether the adsorbent corresponding to each set of second training sample data is damaged or whether the adsorbent is completely regenerated in the flushing process in the historical production. For example, when the sorbent is damaged or not fully regenerated, the second label may be 0; when the adsorbent is completely regenerated, the second label may be 1. The first label can be labeled based on manual mode and the like.
In training the initial flush model, the controller may input a second training sample for each set of samples to the flush model. And (5) outputting a washing result through the processing of the washing model. The controller may construct a loss function based on the second label and the output of the washing model, and iteratively update parameters of the washing model based on the loss function until the preset conditions are met and the trained washing model is obtained. The preset condition may be that the loss function is less than a threshold, convergence, or that the training period reaches a threshold.
Some embodiments of the present disclosure, determining the flushing flow rate threshold range through the flushing model, may enable the accuracy of the maximum threshold and the minimum threshold of the obtained flushing flow rate threshold range to be higher, and simultaneously, maintain the real-time flushing flow rate within the flushing flow rate threshold range, facilitate complete regeneration of the adsorbent, and prolong the service life of the adsorbent.
Fig. 7 is an exemplary flow chart of a method of controlling a pneumatic safety valve according to some embodiments shown herein.
In some embodiments, the flow 700 may be performed by a controller. As shown in fig. 7, the process 700 includes the following steps:
step 710, acquiring a gas pressure of at least one sub-pipe.
In some embodiments, the gas inlet and/or the gas outlet of the adsorption tower are respectively provided with a plurality of identical sub-pipelines, at least one sub-pipeline in the plurality of sub-pipelines is provided with a pneumatic safety valve, and the pneumatic safety valve is configured with a preset opening pressure. The controller may acquire the gas pressure of the at least one sub-pipe through the pressure acquisition device. Reference is made to fig. 1 and its description for the pneumatic safety valve and pressure acquisition device.
And 720, responding to the gas pressure of at least one sub-pipeline being larger than the preset opening pressure, and controlling the corresponding pneumatic safety valve of at least one sub-pipeline to open.
The preset cracking pressure may refer to a critical pressure value for controlling the pneumatic safety valve. The preset opening pressure can be set according to actual production requirements when the pneumatic safety valve is installed. When the real-time pressure value in the sub-pipeline provided with the pneumatic safety valve is larger than the preset opening pressure value, the controller can control the pneumatic safety valve to be opened so as to reduce the pressure in the adsorption tower, simultaneously enlarge the number of channels (sub-pipelines) through which gas flows and slow down the flushing flow rate of the gas.
And 730, controlling the corresponding pneumatic safety valve of the at least one sub-pipeline to be closed in response to the gas pressure of the at least one sub-pipeline being less than the preset opening pressure.
The controller may control the pneumatic safety valve to close as the pressure in the subduct decreases to a predetermined opening pressure. It can be understood that when the gas pressure in the adsorption tower is small, the number of passages (sub-pipes) through which the gas flows can be reduced by controlling the pneumatic safety valve of the sub-pipe to be closed, so that the low-pressure low-flow rate gas becomes more concentrated, which helps to maintain the pressure and the gas flow rate and avoid the continuous decrease of the pressure or the flushing flow rate.
In some embodiments, the pneumatic safety valves include a first number of first pneumatic safety valves and a second number of second pneumatic safety valves.
The preset opening pressures of the first pneumatic safety valve and the second pneumatic safety valve may be different. The first pneumatic relief valve may be assigned a pneumatic relief valve which is set with a higher preset opening pressure. The second pneumatic safety valve may be assigned a pneumatic safety valve configured with a lower preset opening pressure. The first pneumatic safety valve and the second pneumatic safety valve are configured with different preset opening pressures, and the gas pressure in the adsorption tower can be adjusted in a targeted manner at different rising stages so as to buffer the rising of the pressure or the gas flow speed too fast.
The corresponding preset pressures of the first pneumatic safety valve and the second pneumatic safety valve are related to a preset flushing flow rate threshold range. In some embodiments, the preset cracking pressure of the first pneumatic safety valve may be determined based on the corresponding gas pressure at the maximum flush flow rate threshold. The preset cracking pressure of the second pneumatic safety valve may be determined based on the pneumatic pressure corresponding to the minimum flush flow rate threshold. Wherein the preset flush flow rate threshold range may be determined based on the flush model. Reference is made to fig. 6 and its description regarding the irrigation flow rate threshold range and the irrigation model.
The first number may refer to the number of sub-pipes provided with the first pneumatic safety valve. The second number may refer to the number of sub-pipes provided with the second pneumatic safety valve.
In some embodiments, the sum of the first number and the second number does not exceed 20% of the number of all of the subducts.
Some embodiments of this description can adjust the change of gas pressure and velocity of flow in the adsorption tower through pneumatic relief valve, slow down the influence that the adsorbent received gas of higher velocity of flow erodees, when being favorable to the protection to the adsorbent, can reduce the influence of too high gas velocity of flow to adsorption tower, pipeline.
It should be noted that the above description of the flow is for illustration and description only and does not limit the scope of the application of the present specification. Various modifications and changes to the flow may occur to those skilled in the art, given the benefit of this disclosure. However, such modifications and variations are still within the scope of the present specification.
One of the embodiments of the present specification provides a computer-readable storage medium, where the storage medium stores computer instructions, and when the computer reads the computer instructions in the storage medium, the computer executes the foregoing method for adjusting the adsorption adaptive adjustment system of the adsorption tower.
Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing detailed disclosure is to be regarded as illustrative only and not as limiting the present specification. Various modifications, improvements and adaptations to the present description may occur to those skilled in the art, although not explicitly described herein. Such alterations, modifications, and improvements are intended to be suggested in this specification, and are intended to be within the spirit and scope of the exemplary embodiments of this specification.
Also, the description uses specific words to describe embodiments of the description. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means a feature, structure, or characteristic described in connection with at least one embodiment of the specification. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the specification may be combined as appropriate.
Additionally, the order in which elements and sequences are described in this specification, the use of numerical letters, or other designations are not intended to limit the order of the processes and methods described in this specification, unless explicitly stated in the claims. While various presently contemplated embodiments of the invention have been discussed in the foregoing disclosure by way of example, it is to be understood that such detail is solely for that purpose and that the appended claims are not limited to the disclosed embodiments, but, on the contrary, are intended to cover all modifications and equivalent arrangements that are within the spirit and scope of the embodiments herein. For example, although the system components described above may be implemented by hardware devices, they may also be implemented by software-only solutions, such as installing the described system on an existing server or mobile device.
Similarly, it should be noted that in the foregoing description of embodiments of the present specification, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to imply that more features are required than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.
Numerals describing the number of components, attributes, etc. are used in some embodiments, it being understood that such numerals used in the description of the embodiments are modified in some instances by the use of the modifier "about", "approximately" or "substantially". Unless otherwise indicated, "about", "approximately" or "substantially" indicates that the number allows a variation of ± 20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximations that may vary depending upon the desired properties of the individual embodiments. In some embodiments, the numerical parameter should take into account the specified significant digits and employ a general digit-preserving approach. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the range are approximations, in the specific examples, such numerical values are set forth as precisely as possible within the scope of the application.
For each patent, patent application publication, and other material, such as articles, books, specifications, publications, documents, etc., cited in this specification, the entire contents of each are hereby incorporated by reference into this specification. Except where the application history document does not conform to or conflict with the contents of the present specification, it is to be understood that the application history document, as used herein in the present specification or appended claims, is intended to define the broadest scope of the present specification (whether presently or later in the specification) rather than the broadest scope of the present specification. It is to be understood that the descriptions, definitions and/or uses of terms in the accompanying materials of this specification shall control if they are inconsistent or contrary to the descriptions and/or uses of terms in this specification.
Finally, it should be understood that the embodiments described herein are merely illustrative of the principles of the embodiments described herein. Other variations are also possible within the scope of this description. Thus, by way of example, and not limitation, alternative configurations of the embodiments of the specification can be considered consistent with the teachings of the specification. Accordingly, the embodiments of the present description are not limited to only those embodiments explicitly described and depicted herein.

Claims (11)

1. An adsorption self-adaptive adjusting system of an adsorption tower comprises at least two adsorption towers, a connecting pipeline, a control valve and a controller;
each adsorption tower comprises a gas inlet and a gas outlet, and the gas inlet is connected with a gas inlet pipeline of the adsorption tower; the gas outlet is connected with a gas outlet pipeline of the adsorption tower; the air inlet and the air outlet are honeycomb-shaped;
the connecting pipeline comprises a first connecting pipeline and a second connecting pipeline, and the first connecting pipeline is used for connecting the air inlet pipelines of the two adsorption towers; the second connecting pipeline is used for connecting the gas outlet pipelines of the two adsorption towers;
the control valve is arranged in the connecting pipeline and is used for adjusting the gas pressure and/or the gas flushing flow rate in each adsorption tower;
the controller is configured to:
determining a target opening of the control valve based on gas related data within each of the adsorption columns, wherein the gas related data includes gas pressure data and gas flow rate data;
and adjusting the opening of the control valve based on the target opening.
2. The system of claim 1, the first connecting conduit and/or the second connecting conduit comprising a first subduct and a second subduct arranged side-by-side;
the control valve comprises a regulating valve, the regulating valve comprises a first regulating valve and a second regulating valve, the first regulating valve is arranged on the first sub-pipeline, and the second regulating valve is arranged on the second sub-pipeline;
the target opening degree comprises a first opening degree corresponding to the first regulating valve and a second opening degree corresponding to the second regulating valve;
the adsorption tower further comprises:
the pressure acquisition device is used for acquiring real-time pressure data in each adsorption tower;
the controller is further configured to:
acquiring real-time pressure data of the pressure acquisition device;
determining the first opening degree and/or the second opening degree based on the real-time pressure data.
3. The system of claim 2, the adsorption column comprising an adsorption treatment and a desorption treatment;
the controller is further configured to:
acquiring a preset pressure change rate, wherein the preset pressure change rate comprises an adsorption pressure change rate corresponding to the adsorption treatment and a desorption pressure change rate corresponding to the desorption treatment;
determining a target adsorption opening degree during the adsorption treatment and a desorption opening degree during the desorption treatment based on the preset pressure change rate;
adjusting the first regulating valve and/or the second regulating valve based on the target adsorption opening and the desorption opening.
4. The system of claim 1, the adsorption column further comprising:
the flow velocity detection device is used for acquiring the real-time flushing flow velocity of the gas in each adsorption tower; the target opening degree is also related to the real-time flushing flow rate of the gas in the adsorption tower;
the controller is further configured to:
and determining the target opening degree of the control valve based on the acquired real-time flushing flow rate and a preset flushing flow rate threshold range.
5. The system of claim 1, wherein the gas inlet and the gas outlet of the adsorption tower are respectively provided with a plurality of sub-pipelines, and the plurality of sub-pipelines are intersected at the joint of the corresponding gas inlet pipeline or gas outlet pipeline of the adsorption tower; at least one of the plurality of sub-pipelines is provided with a pneumatic safety valve, and the pneumatic safety valve is configured with a preset opening pressure;
the controller is further configured to:
acquiring the gas pressure of the at least one sub-pipeline;
in response to the gas pressure of the at least one sub-pipeline being greater than the preset opening pressure, controlling the pneumatic safety valve corresponding to the at least one sub-pipeline to open;
and controlling the pneumatic safety valve corresponding to the at least one sub-pipeline to close in response to the gas pressure of the at least one sub-pipeline being less than the preset opening pressure.
6. A method of tuning an adsorption tower adsorption adaptive tuning system comprising at least two adsorption towers, connecting piping, control valves, and a controller, the method being performed by the controller, the method comprising:
determining a target opening of the control valve based on gas related data within each of the adsorption columns, wherein the gas related data includes gas pressure data and gas flow rate data;
and adjusting the opening of the control valve based on the target opening.
7. The method of claim 6, the control valve comprising a regulating valve comprising a first regulating valve and a second regulating valve, the target opening comprising a first opening corresponding to the first regulating valve and a second opening corresponding to the second regulating valve;
the determining the target opening degree of the control valve includes:
acquiring real-time pressure data in each adsorption tower based on a pressure acquisition device;
and determining the first opening degree and/or the second opening degree based on the real-time pressure data and a preset pressure change rate.
8. The method of claim 7, the adsorption column comprising an adsorption treatment and a desorption treatment; the target opening degree includes a target adsorption opening degree in the adsorption treatment and a desorption opening degree in the desorption treatment; the method further comprises the following steps:
acquiring a preset pressure change rate, wherein the preset pressure change rate comprises an adsorption pressure change rate corresponding to the adsorption treatment and a desorption pressure change rate corresponding to the desorption treatment;
determining a target adsorption opening degree during the adsorption treatment and a target desorption opening degree during the desorption treatment based on the preset pressure change rate;
adjusting the first regulating valve and/or the second regulating valve based on the target adsorption opening and the target desorption opening.
9. The method of claim 6, the target opening further being related to a real-time purge flow rate of gas within the adsorption column;
the determining the target opening degree of the control valve further includes:
acquiring the real-time washing flow rate of each adsorption tower through a flow rate detection device;
and determining the target opening degree of the control valve based on the real-time flushing flow rate and a preset flushing flow rate threshold range.
10. The method according to claim 6, wherein the gas inlet and/or the gas outlet of the adsorption tower are respectively provided with a plurality of identical sub-pipelines, at least one sub-pipeline of the plurality of sub-pipelines is provided with a pneumatic safety valve, and the pneumatic safety valve is configured with a preset opening pressure;
the method further comprises the following steps:
acquiring the gas pressure of the at least one sub-pipeline;
in response to the gas pressure of the at least one sub-pipeline being greater than the preset opening pressure, controlling the pneumatic safety valve corresponding to the at least one sub-pipeline to open;
and controlling the pneumatic safety valve corresponding to the at least one sub-pipeline to be closed in response to the gas pressure of the at least one sub-pipeline being less than the preset opening pressure.
11. A computer-readable storage medium storing computer instructions, which when read by the computer, cause the computer to execute the adsorption adaptive adjustment method of any one of claims 6 to 10.
CN202211624893.8A 2022-12-16 2022-12-16 Adsorption self-adaptive adjusting method and system for adsorption tower Active CN115945027B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211624893.8A CN115945027B (en) 2022-12-16 2022-12-16 Adsorption self-adaptive adjusting method and system for adsorption tower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211624893.8A CN115945027B (en) 2022-12-16 2022-12-16 Adsorption self-adaptive adjusting method and system for adsorption tower

Publications (2)

Publication Number Publication Date
CN115945027A true CN115945027A (en) 2023-04-11
CN115945027B CN115945027B (en) 2024-02-27

Family

ID=87297565

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211624893.8A Active CN115945027B (en) 2022-12-16 2022-12-16 Adsorption self-adaptive adjusting method and system for adsorption tower

Country Status (1)

Country Link
CN (1) CN115945027B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5495842A (en) * 1993-09-10 1996-03-05 Honda Giken Kogyo Kabushiki Kaisha Evaporative fuel-processing system for internal combustion engines
US20060288867A1 (en) * 2005-06-23 2006-12-28 Herb Blaine E Valve operation diagnostic method for pressure swing adsorption systems
CN101102829A (en) * 2004-12-17 2008-01-09 德士古发展公司 Apparatus and methods for producing hydrogen
CN205575628U (en) * 2015-12-18 2016-09-14 四川天采科技有限责任公司 It presses desorption PSA to carry device of hydrogen to realize two high bands
CN107349746A (en) * 2017-08-29 2017-11-17 四川天采科技有限责任公司 The pressure swing absorption process of pressure change coordinated signals in a kind of circulate operation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5495842A (en) * 1993-09-10 1996-03-05 Honda Giken Kogyo Kabushiki Kaisha Evaporative fuel-processing system for internal combustion engines
CN101102829A (en) * 2004-12-17 2008-01-09 德士古发展公司 Apparatus and methods for producing hydrogen
US20060288867A1 (en) * 2005-06-23 2006-12-28 Herb Blaine E Valve operation diagnostic method for pressure swing adsorption systems
CN205575628U (en) * 2015-12-18 2016-09-14 四川天采科技有限责任公司 It presses desorption PSA to carry device of hydrogen to realize two high bands
CN107349746A (en) * 2017-08-29 2017-11-17 四川天采科技有限责任公司 The pressure swing absorption process of pressure change coordinated signals in a kind of circulate operation

Also Published As

Publication number Publication date
CN115945027B (en) 2024-02-27

Similar Documents

Publication Publication Date Title
CN107833648B (en) Multi-control-area negative pressure control system and control method for marine nuclear power platform
CN110787600A (en) Closed two-tower dehydration device with regenerated gas dryer and dehydration method
CN107224843B (en) Compressed air dryer
CN107456845B (en) Pressure swing adsorption device and control method thereof
CN115945027B (en) Adsorption self-adaptive adjusting method and system for adsorption tower
CN103894044A (en) New device for drying acetylene
US6733568B2 (en) Method of controlling a plant for processing a gas by adsorption and corresponding processing plant
CN109876594B (en) Air adsorption purification system in air separation device
CN117764332A (en) Environment-friendly and efficient textile printing and dyeing wastewater treatment system
CN210572148U (en) Pretreatment system of online chromatographic analyzer
JP2008534250A (en) Method for adjusting an apparatus for gas adsorption treatment
CN210021626U (en) Automatic adsorption system suitable for tail gas concentration changes
CN114437846B (en) Optimization method for natural gas pressure swing adsorption denitrification based on computer
CN105126533A (en) Method, apparatus and system for controlling natural gas adsorption column, and purification system
CN214715469U (en) Automatic control device for flue gas balance system of active coke adsorption tower
CN212548938U (en) Waste gas treatment system with concentration buffer effect
CN110508094B (en) Organic waste gas recovery system and full-automatic control method thereof
CN111715041A (en) Waste gas treatment system with concentration buffer effect
CN108534282B (en) Double-channel air exhaust device and air exhaust method
JP6280715B2 (en) Gas separation device
CN208553669U (en) A kind of drying system for compressed gas
CN206075162U (en) A kind of many stove seat Pressure Control System for Coke-Oven based on PLC
CN111054190A (en) Linkage control system and method for compressed air dew point temperature main pipe
US5938816A (en) Process for purifying gases loaded in particular with chemical residues
CN203620474U (en) Molecular sieve purifying system in air separation facility

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant