Intelligent tetrafluoroethane deacidification unit control method
By adopting intelligent control methods in the deacidization process of tetrafluoroethane, comprehensively monitoring and adjusting reactant parameters, the problem of inconvenient monitoring and control of reactant parameters in the prior art is solved, and the deacidization effect of tetrafluoroethane is improved.
Patent Information
- Application Number
- CN202411712700.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-03-14
AI Technical Summary
In the prior art, during the deacidification process of tetrafluoroethane, it is not convenient to conduct comprehensive monitoring and control of reactant parameters, resulting in affecting the deacidification effect of tetrafluoroethane.
A tetrafluoroethane intelligent deacidation unit control method is adopted to achieve comprehensive monitoring and regulation of reactant parameters by preparing the control system, including reflux module, collection module, deacidation module, purification module, purification module, drying module, distillation module, quality index monitoring module, monitoring module and adjustment module.
In the process of deacidification of tetrafluoroethane, it is possible to facilitate comprehensive monitoring and control of reactant parameters, thereby ensuring the deacidification effect of tetrafluoroethane.
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Abstract
Description
Technical Field
[0001] The invention relates to the technical field of tetrafluoroethane, and in particular to a tetrafluoroethane intelligent deacidification unit control method. Background Art
[0002] Tetrafluoroethane (1,1,1,2-tetrafluoroethane) does not damage the ozone layer at all because R-134a belongs to the HFC class of substances (non-ODS substances Ozone-depleting Substances). It is an environmentally friendly refrigerant recognized and recommended for use by most countries in the world. It is also a mainstream environmentally friendly refrigerant and is widely used in the initial installation and re-addition during maintenance of new refrigeration and air-conditioning equipment. The raw materials for the preparation of tetrafluoroethane are trichloroethylene and anhydrous hydrogen fluoride. In addition to tetrafluoroethane, chlorotrifluoroethane, 1,1-difluoro-2-chloroethylene, hydrogen chloride and trace amounts of other low-boiling substances, the reaction products also contain a large amount of unreacted anhydrous hydrogen fluoride, which affects the product quality and price, and thus affects the economic benefits of the enterprise. In the post-processing process, in addition to separating the organic substances chlorotrifluoroethane, 1,1-difluoro-2-chloroethylene and low-boiling substances in the product, it is also necessary to separate the acidic substances anhydrous hydrogen fluoride and hydrogen chloride in the components, and finally obtain tetrafluoroethane products with qualified purity. In the process of tetrafluoroethane deacidification, the state of the reactants needs to be controlled in real time to ensure that the deacidification effect meets the standards.
[0003] In the prior art, it is not convenient to fully monitor and control the parameters of the reactants during the deacidification process of tetrafluoroethane, which affects the deacidification effect of tetrafluoroethane. To this end, we propose a tetrafluoroethane intelligent deacidification unit control method to solve the above problem. Summary of the invention
[0004] The purpose of the present invention is to solve the problem that in the prior art, it is not convenient to comprehensively monitor and control the parameters of the reactants during the deacidification process of tetrafluoroethane, thereby affecting the deacidification effect of tetrafluoroethane, and a method for controlling a tetrafluoroethane intelligent deacidification unit is proposed.
[0005] The present application provides a tetrafluoroethane intelligent deacidification unit control method using the following technical solutions:
[0006] A method for controlling a tetrafluoroethane intelligent deacidification unit comprises the following steps:
[0007] S1: Prepare a control system, the control system includes a reflux module and a collection module, the reflux module and the collection module are connected to the same deacidification module, the deacidification module is connected to a purification module, the purification module is connected to a purification module, the purification module is connected to a drying module, the drying module is connected to a distillation module, the distillation module is connected to a quality index monitoring module, the quality index monitoring module is connected to a finished product processing module, the deacidification module, the purification module and the purification module are respectively connected to a first monitoring module, a second monitoring module and a third monitoring module, the first monitoring module, the second monitoring module and the third monitoring module are connected to the same acquisition module, the acquisition module is connected to a second judgment module, the second judgment module is connected to a control module, the control module is connected to a regulating module, the deacidification module is connected to a detection module, the detection module is connected to an evaluation module, the evaluation module is connected to a first judgment module, the first judgment module is connected to a conveying module, and the conveying module is connected to the reflux module and the purification module;
[0008] S2: The crude tetrafluoroethane raw material is collected by the collection module and transported to the deacidification module. The deacidification module reacts the crude tetrafluoroethane raw material to remove impurities. The reactants after the impurities are removed enter the purification module for purification. The purified reactants enter the drying module for water alkali washing and drying. The distillation module distills the dried tetrafluoroethane to obtain a tetrafluoroethane product. The quality index monitoring module monitors the indicators of the tetrafluoroethane product. The finished product processing module packages the products that pass the monitoring.
[0009] S3: When the deacidification module reacts the crude tetrafluoroethane raw material, the detection module detects the acidity of the reactant after impurities are removed, and the evaluation module evaluates the acidity. The first judgment module makes a judgment based on the evaluation result. If the acidity is qualified, the conveying module conveys the reactant after impurities are removed to the purification module for purification. If the acidity is unqualified, the conveying module conveys the reactant after impurities are removed to the reflux module, and the reflux module conveys the reactant to the deacidification module for secondary impurity removal.
[0010] S4: Finally, the parameters of the deacidification module, the purification module and the purification module are monitored respectively by the first monitoring module, the second monitoring module and the third monitoring module, the acquisition module acquires the monitoring data, the second judgment module makes a judgment based on the acquired parameters, and finally, the parameters of the deacidification module, the purification module and the purification module are adjusted by the control module and the adjustment module.
[0011] Furthermore, the first monitoring module includes a first temperature monitoring unit, a first pressure monitoring unit and a flow monitoring unit, the first temperature monitoring unit is connected to the first pressure monitoring unit, and the first pressure monitoring unit is connected to the flow monitoring unit.
[0012] Furthermore, the second monitoring module includes a second temperature monitoring unit, a second pressure monitoring unit and a liquid level monitoring unit, the second temperature monitoring unit is connected to the second pressure monitoring unit, and the second pressure monitoring unit is connected to the liquid level monitoring unit.
[0013] Further, the third monitoring module includes a third temperature monitoring unit, a third pressure monitoring unit and a conversion rate monitoring unit, the third temperature monitoring unit is connected to the third pressure monitoring unit, and the third pressure monitoring unit is connected to the conversion rate monitoring unit.
[0014] Furthermore, the quality indicator monitoring module includes a purity monitoring unit, a moisture content monitoring unit and a residue monitoring unit, the purity monitoring unit is connected to the moisture content monitoring unit, and the moisture content monitoring unit is connected to the residue monitoring unit.
[0015] Furthermore, the deacidification module is used to perform a preliminary reaction to remove impurities from the crude tetrafluoroethane raw material, the purification module is used to further purify the reactant, and the purification module is used to perform a heating purification reaction on the purified reactant.
[0016] Furthermore, the detection module is used to detect the acidity of the reactants of the preliminary impurity removal reaction of the deacidification module, the evaluation module is used to evaluate the detection result, and the first judgment module is used to judge the deacidification effect according to the evaluation result.
[0017] Furthermore, the first monitoring module is used to monitor the reactant temperature, pressure and flow parameters of the deacidification module, the second monitoring module is used to monitor the reactant temperature, pressure and liquid level of the purification module, and the third monitoring module is used to monitor the reactant temperature, pressure and conversion rate of the purification module.
[0018] Furthermore, the acquisition module is used to acquire monitoring data, the second judgment module is used to evaluate and judge the acquired data, the control module is used to drive the adjustment module, and the adjustment module is used to adjust and set parameters.
[0019] Furthermore, the distillation module is used to perform distillation treatment on the dried tetrafluoroethane, the quality indicator monitoring unit is used to monitor the quality indicators of the finished tetrafluoroethane, and the finished product processing module is used to package the finished tetrafluoroethane.
[0020] In summary, the present application includes at least one of the following beneficial technical effects:
[0021] 1. This scheme collects the crude tetrafluoroethane raw material through the collection module and transports it to the deacidification module. The deacidification module reacts the crude tetrafluoroethane raw material to remove impurities. The reactants after impurities are removed enter the purification module for purification. The purified reactants enter the drying module for water alkali washing and drying treatment. The distillation module distills the dried tetrafluoroethane to obtain the tetrafluoroethane finished product. The quality index monitoring module monitors the indicators of the tetrafluoroethane finished product. The finished product processing module packages the products that pass the monitoring.
[0022] 2. In this scheme, when the deacidification module reacts the crude tetrafluoroethane raw material, the detection module detects the acidity of the reactant after the impurities are removed, and the acidity is evaluated by the evaluation module. The first judgment module makes a judgment based on the evaluation result. If the acidity is qualified, the conveying module conveys the reactant after impurities are removed to the purification module for purification. If the acidity is unqualified, the conveying module conveys the reactant after impurities are removed to the reflux module, and the reflux module conveys the reactant to the deacidification module for secondary impurity removal.
[0023] 3. This scheme monitors the parameters of the deacidification module, the purification module and the purification module respectively through the first monitoring module, the second monitoring module and the third monitoring module, the acquisition module collects the monitoring data, the second judgment module makes a judgment based on the collected parameters, and finally adjusts the parameters of the deacidification module, the purification module and the purification module through the control module and the adjustment module.
[0024] The present invention can facilitate comprehensive monitoring and control of reactant parameters during the tetrafluoroethane deacidification process, thereby ensuring the deacidification effect of tetrafluoroethane. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 This is a structural block diagram of a control system of a tetrafluoroethane intelligent deacidification unit control method proposed by the present invention;
[0026] Figure 2 This is a structural block diagram of a first monitoring module of a tetrafluoroethane intelligent deacidification unit control method proposed by the present invention;
[0027] Figure 3 This is a structural block diagram of a second monitoring module of a tetrafluoroethane intelligent deacidification unit control method proposed by the present invention;
[0028] Figure 4 This is a structural block diagram of the third monitoring module of the tetrafluoroethane intelligent deacidification unit control method proposed by the present invention;
[0029] Figure 5 This is a structural block diagram of a quality indicator monitoring module of a tetrafluoroethane intelligent deacidification unit control method proposed in the present invention. DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0031] Embodiment 1
[0032] Reference Figure 1-Figure 5 , a tetrafluoroethane intelligent deacidification unit control method, comprising the following steps:
[0033] S1: Prepare a control system, the control system includes a reflux module and a collection module, the reflux module and the collection module are connected to the same deacidification module, the deacidification module is connected to the purification module, the purification module is connected to the purification module, the purification module is connected to the drying module, the drying module is connected to the distillation module, the distillation module is connected to the quality index monitoring module, the quality index monitoring module is connected to the finished product processing module, the deacidification module, the purification module and the purification module are respectively connected to the first monitoring module, the second monitoring module and the third monitoring module, the first monitoring module, the second monitoring module and the third monitoring module are connected to the same acquisition module, the acquisition module is connected to the second judgment module, the second judgment module is connected to the control module, the control module is connected to the adjustment module, the deacidification module is connected to the detection module, the detection module is connected to the evaluation module, the evaluation module is connected to the first judgment module, the first judgment module is connected to A conveying module is provided, the conveying module is connected with a reflux module and a purification module, the deacidification module is used for performing a preliminary reaction and impurity removal on a crude tetrafluoroethane raw material, the purification module is used for further purifying the reactant, the purification module is used for heating and purifying the purified reactant, the detection module is used for detecting the acidity of the reactant in the preliminary impurity removal reaction of the deacidification module, the evaluation module is used for evaluating the detection result, the first judgment module is used for judging the deacidification effect according to the evaluation result, the collection module is used for collecting monitoring data, the second judgment module is used for evaluating and judging the collected data, the control module is used for driving the adjustment module, the adjustment module is used for adjusting and setting parameters, the distillation module is used for distilling the dried tetrafluoroethane, the quality index monitoring unit is used for monitoring the quality index of the finished tetrafluoroethane, and the finished product processing module is used for packaging the finished tetrafluoroethane;
[0034] S2: The crude tetrafluoroethane raw material is collected by the collection module and transported to the deacidification module. The deacidification module reacts the crude tetrafluoroethane raw material to remove impurities. The reactants after the impurities are removed enter the purification module for purification. The purified reactants enter the drying module for water alkali washing and drying. The distillation module distills the dried tetrafluoroethane to obtain a tetrafluoroethane product. The quality index monitoring module monitors the indicators of the tetrafluoroethane product. The finished product processing module packages the products that pass the monitoring.
[0035] S3: When the deacidification module reacts the crude tetrafluoroethane raw material, the detection module detects the acidity of the reactant after impurities are removed, and the evaluation module evaluates the acidity. The first judgment module makes a judgment based on the evaluation result. If the acidity is qualified, the conveying module conveys the reactant after impurities are removed to the purification module for purification. If the acidity is unqualified, the conveying module conveys the reactant after impurities are removed to the reflux module, and the reflux module conveys the reactant to the deacidification module for secondary impurity removal.
[0036] S4: Finally, the parameters of the deacidification module, the purification module and the purification module are monitored respectively by the first monitoring module, the second monitoring module and the third monitoring module, the acquisition module acquires the monitoring data, the second judgment module makes a judgment based on the acquired parameters, and finally, the parameters of the deacidification module, the purification module and the purification module are adjusted by the control module and the adjustment module.
[0037] Reference Figure 2-Figure 5 The first monitoring module includes a first temperature monitoring unit, a first pressure monitoring unit and a flow monitoring unit, the first temperature monitoring unit is connected to the first pressure monitoring unit, the first pressure monitoring unit is connected to the flow monitoring unit, the second monitoring module includes a second temperature monitoring unit, a second pressure monitoring unit and a liquid level monitoring unit, the second temperature monitoring unit is connected to the second pressure monitoring unit, the second pressure monitoring unit is connected to the liquid level monitoring unit, the third monitoring module includes a third temperature monitoring unit, a third pressure monitoring unit and a conversion rate monitoring unit, the third temperature monitoring unit is connected to the third pressure monitoring unit, the third pressure monitoring unit is connected to the conversion rate monitoring unit , the first monitoring module is used to monitor the reactant temperature, pressure and flow parameters of the deacidification module, the second monitoring module is used to monitor the reactant temperature, pressure and liquid level of the purification module, the third monitoring module is used to monitor the reactant temperature, pressure and conversion rate of the purification module, the quality indicator monitoring module includes a purity monitoring unit, a moisture content monitoring unit and a residue monitoring unit, the purity monitoring unit is connected to the moisture content monitoring unit, the moisture content monitoring unit is connected to the residue monitoring unit, the quality indicator monitoring module adopts a quality indicator monitoring algorithm, and the quality indicator monitoring algorithm includes titration analysis, ultraviolet spectrophotometry and high performance liquid chromatography;
[0038] Titration analysis
[0039] Titration analysis is mainly used for the content determination of raw materials, including direct titration and residual titration. The formula of direct titration is:
[0040]
[0041] Where W is the sample weight of the test product, V is the volume of the titrant consumed in the titration, T is the mass of the drug being tested per milliliter of titrant, and F is the correction factor for the titrant concentration;
[0042] UV spectrophotometry
[0043] Ultraviolet spectrophotometry is used to determine the content of raw materials and preparations, including the reference comparison method and the absorption coefficient method. The formula for the reference comparison method is:
[0044]
[0045] Among them, C X and C R are the concentrations of the test and reference solutions, respectively, and A X and A R are the absorbance of the test and reference solutions, respectively;
[0046] High performance liquid chromatography
[0047] High performance liquid chromatography is a commonly used analytical method for separating and quantitatively analyzing chemical components. Its calculation formula depends on the specific analysis purpose and usually involves factors such as the sample's absorbance, concentration, and volume.
[0048] The implementation principle of this embodiment is as follows: when in use, the crude tetrafluoroethane raw material is collected by the collection module and transported to the deacidification module, the deacidification module reacts the crude tetrafluoroethane raw material to remove impurities, the reactant after the impurities are removed enters the purification module for purification, the reactant after purification enters the drying module for water alkali washing and drying treatment, the distillation module distills the dried tetrafluoroethane to obtain a tetrafluoroethane finished product, the quality index monitoring module monitors the index of the tetrafluoroethane finished product, the finished product processing module packages the monitored qualified products, when the deacidification module reacts the crude tetrafluoroethane raw material, the detection module detects the acidity of the reactant after the impurities are removed, and evaluates the acidity of the reactant. The module evaluates the acidity, and the first judgment module makes a judgment based on the evaluation result. If the acidity is qualified, the conveying module conveys the reactant after impurity removal to the purification module for purification. If the acidity is unqualified, the conveying module conveys the reactant after impurity removal to the reflux module, and the reflux module conveys the reactant to the deacidification module for secondary impurity removal. Finally, the first monitoring module, the second monitoring module and the third monitoring module respectively monitor the parameters of the deacidification module, the purification module and the purification module, the acquisition module collects the monitoring data, the second judgment module makes a judgment based on the collected parameters, and finally, the control module and the adjustment module adjust the parameters of the deacidification module, the purification module and the purification module.
[0049] Embodiment 2
[0050] The difference between this embodiment and the first embodiment is that the collecting module is connected to the metering module, and the metering module is connected to the automatic feeding module. The specific gravity of the raw material can be measured by the metering module, and the automatic feeding module automatically feeds the raw material to improve the deacidification efficiency of tetrafluoroethane.
[0051] Embodiment 3
[0052] The difference between this embodiment and the first embodiment is that the deacidification module, the purification module and the purification module are connected to the same risk assessment module, and the risk assessment module is used to collect and assess the risk factors of the deacidification module, the purification module and the purification module.
[0053] Embodiment 4
[0054] The difference between this embodiment and the third embodiment is that the risk assessment module is connected to the trigger module, the trigger module is connected to the alarm module, the trigger module triggers the alarm module according to the assessment result, and the alarm module can issue a warning to improve the safety of operation.
[0055] Embodiment 5
[0056] The difference between this embodiment and the fourth embodiment is that the risk assessment module is connected to the exception handling solution module, and the exception handling solution module is used to provide a disposal solution according to the assessment result to avoid blind disposal after the reaction is abnormal and cause safety accidents.
[0057] Experimental example
[0058] By comparing the tetrafluoroethane intelligent deacidification unit control scheme proposed in Examples 1 to 5 with the conventional deacidification unit control scheme, the experimental data are as follows:
[0059] Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Improved safety Improved safety Improved safety Improved safety Improved safety 10% 12% 15% 18% 20%
[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A method for controlling a tetrafluoroethane intelligent deacidification unit, characterized in that: The following steps are involved: S1: Prepare a control system, the control system includes a reflux module and a collection module, the reflux module and the collection module are connected to the same deacidification module, the deacidification module is connected to a purification module, the purification module is connected to a purification module, the purification module is connected to a drying module, the drying module is connected to a distillation module, the distillation module is connected to a quality index monitoring module, the quality index monitoring module is connected to a finished product processing module, the deacidification module, the purification module and the purification module are respectively connected to a first monitoring module, a second monitoring module and a third monitoring module, the first monitoring module, the second monitoring module and the third monitoring module are connected to the same acquisition module, the acquisition module is connected to a second judgment module, the second judgment module is connected to a control module, the control module is connected to a regulating module, the deacidification module is connected to a detection module, the detection module is connected to an evaluation module, the evaluation module is connected to a first judgment module, the first judgment module is connected to a conveying module, and the conveying module is connected to the reflux module and the purification module; S2: The crude tetrafluoroethane raw material is collected by the collection module and transported to the deacidification module. The deacidification module reacts the crude tetrafluoroethane raw material to remove impurities. The reactants after the impurities are removed enter the purification module for purification. The purified reactants enter the drying module for water alkali washing and drying. The distillation module distills the dried tetrafluoroethane to obtain a tetrafluoroethane product. The quality index monitoring module monitors the indicators of the tetrafluoroethane product. The finished product processing module packages the products that pass the monitoring. S3: When the deacidification module reacts the crude tetrafluoroethane raw material, the detection module detects the acidity of the reactant after impurities are removed, and the evaluation module evaluates the acidity. The first judgment module makes a judgment based on the evaluation result. If the acidity is qualified, the conveying module conveys the reactant after impurities are removed to the purification module for purification. If the acidity is unqualified, the conveying module conveys the reactant after impurities are removed to the reflux module, and the reflux module conveys the reactant to the deacidification module for secondary impurity removal. S4: Finally, the parameters of the deacidification module, the purification module and the purification module are monitored respectively by the first monitoring module, the second monitoring module and the third monitoring module, the acquisition module acquires the monitoring data, the second judgment module makes a judgment based on the acquired parameters, and finally, the parameters of the deacidification module, the purification module and the purification module are adjusted by the control module and the adjustment module.
2. A tetrafluoroethane intelligent deacidification unit control method according to claim 1, characterized in that: The first monitoring module includes a first temperature monitoring unit, a first pressure monitoring unit and a flow monitoring unit. The first temperature monitoring unit is connected to the first pressure monitoring unit, and the first pressure monitoring unit is connected to the flow monitoring unit.
3. A tetrafluoroethane intelligent deacidification unit control method according to claim 2, characterized in that: The second monitoring module includes a second temperature monitoring unit, a second pressure monitoring unit and a liquid level monitoring unit. The second temperature monitoring unit is connected to the second pressure monitoring unit, and the second pressure monitoring unit is connected to the liquid level monitoring unit.
4. A tetrafluoroethane intelligent deacidification unit control method according to claim 3, characterized in that: The third monitoring module includes a third temperature monitoring unit, a third pressure monitoring unit and a conversion rate monitoring unit. The third temperature monitoring unit is connected to the third pressure monitoring unit, and the third pressure monitoring unit is connected to the conversion rate monitoring unit.
5. A tetrafluoroethane intelligent deacidification unit control method according to claim 4, characterized in that: The quality indicator monitoring module includes a purity monitoring unit, a moisture content monitoring unit and a residue monitoring unit. The purity monitoring unit is connected to the moisture content monitoring unit, and the moisture content monitoring unit is connected to the residue monitoring unit.
6. A tetrafluoroethane intelligent deacidification unit control method according to claim 5, characterized in that: The deacidification module is used for performing a preliminary reaction to remove impurities from the crude tetrafluoroethane raw material, the purification module is used for further purifying the reactant, and the purification module is used for performing a heating purification reaction on the purified reactant.
7. A tetrafluoroethane intelligent deacidification unit control method according to claim 6, characterized in that: The detection module is used to detect the acidity of the reactants of the initial impurity removal reaction of the deacidification module, the evaluation module is used to evaluate the detection result, and the first judgment module is used to judge the deacidification effect according to the evaluation result.
8. A tetrafluoroethane intelligent deacidification unit control method according to claim 7, characterized in that: The first monitoring module is used to monitor the reactant temperature, pressure and flow parameters of the deacidification module, the second monitoring module is used to monitor the reactant temperature, pressure and liquid level of the purification module, and the third monitoring module is used to monitor the reactant temperature, pressure and conversion rate of the purification module.
9. A tetrafluoroethane intelligent deacidification unit control method according to claim 8, characterized in that: The acquisition module is used to acquire monitoring data, the second judgment module is used to evaluate and judge the acquired data, the control module is used to drive the adjustment module, and the adjustment module is used to adjust and set parameters.
10. A tetrafluoroethane intelligent deacidification unit control method according to claim 9, characterized in that: The distillation module is used to carry out distillation treatment on the dried tetrafluoroethane, the quality index monitoring unit is used to monitor the quality index of the finished tetrafluoroethane, and the finished product processing module is used to package the finished tetrafluoroethane.