CN114200900A - Dispersion control system for THF recovery device - Google Patents
Dispersion control system for THF recovery device Download PDFInfo
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- CN114200900A CN114200900A CN202111431881.9A CN202111431881A CN114200900A CN 114200900 A CN114200900 A CN 114200900A CN 202111431881 A CN202111431881 A CN 202111431881A CN 114200900 A CN114200900 A CN 114200900A
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- 238000011084 recovery Methods 0.000 title claims abstract description 27
- 239000006185 dispersion Substances 0.000 title claims abstract description 18
- 238000004886 process control Methods 0.000 claims abstract description 46
- 238000012544 monitoring process Methods 0.000 claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims description 29
- 230000008569 process Effects 0.000 claims description 28
- 230000006870 function Effects 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 5
- 208000032953 Device battery issue Diseases 0.000 claims description 3
- 239000006227 byproduct Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 229920001896 polybutyrate Polymers 0.000 abstract description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 41
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 22
- 229920003023 plastic Polymers 0.000 description 8
- 239000004033 plastic Substances 0.000 description 8
- 229920000704 biodegradable plastic Polymers 0.000 description 5
- 229920006238 degradable plastic Polymers 0.000 description 3
- 238000005886 esterification reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
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- 239000000047 product Substances 0.000 description 2
- 238000004092 self-diagnosis Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 239000000010 aprotic solvent Substances 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- PTIXVVCRANICNC-UHFFFAOYSA-N butane-1,1-diol;hexanedioic acid Chemical compound CCCC(O)O.OC(=O)CCCCC(O)=O PTIXVVCRANICNC-UHFFFAOYSA-N 0.000 description 1
- JYLRDAXYHVFRPW-UHFFFAOYSA-N butane-1,1-diol;terephthalic acid Chemical compound CCCC(O)O.OC(=O)C1=CC=C(C(O)=O)C=C1 JYLRDAXYHVFRPW-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 150000004292 cyclic ethers Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- -1 heterocyclic organic compound Chemical class 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- WHRNULOCNSKMGB-UHFFFAOYSA-N tetrahydrofuran thf Chemical compound C1CCOC1.C1CCOC1 WHRNULOCNSKMGB-UHFFFAOYSA-N 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/33—Director till display
- G05B2219/33273—DCS distributed, decentralised controlsystem, multiprocessor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Testing And Monitoring For Control Systems (AREA)
Abstract
The present invention provides a dispersion control system for a THF recovery apparatus, comprising: the system comprises a process control layer, an operation monitoring layer and a data service layer, wherein the process control layer is arranged at each part of the THF recovery device, and the operation monitoring layer and the data service layer are arranged in a central control room; the invention can recover THF in PBAT production process as byproduct to be utilized, thereby improving economic benefit, accurately controlling whole production flow of rectification, improving byproduct production rate while ensuring production safety, and effectively realizing controllability of production process.
Description
Technical Field
The invention relates to the technical field of fine chemical engineering control systems, in particular to a decentralized control system for a THF (tetrahydrofuran) recovery device.
Background
The plastic industry has the advantages of easily available materials, low price, convenient processing, light weight, durability and the like, is widely applied to various social fields, and brings great convenience to the life of people. The current annual plastic yield is about 4 hundred million tons internationally, and the annual waste plastic amount is more than 3000 ten thousand tons. A large amount of waste plastic products are difficult to decompose, which forms increasingly serious white pollution and influences the human living environment, the food safety and the sustainable development. Therefore, the preparation of environmentally friendly degradable materials to replace traditional plastics has become a problem that the plastics industry faces to be solved.
Degradable plastics are generally classified into photodegradable plastics, thermo-oxidative degradable plastics and biodegradable plastics. The biggest problem of the application of the photodegradable plastic and the thermo-oxidative degradable plastic is limited by the degradation condition, the degradation is incomplete, and the application is limited. The biodegradable plastic can be completely decomposed in a short time under the composting condition, returns to autodecomposition and is green and environment-friendly. PBAT belongs to thermoplastic biodegradable plastic, is a copolymer of butanediol adipate and butanediol terephthalate, has the characteristics of PBA and PBT, and has better ductility and elongation at break as well as better heat resistance and impact property; in addition, the biodegradable plastic has excellent biodegradability, and is one of the best degradable materials for active research and market application of biodegradable plastics.
PBAT can be produced by a direct continuous esterification production process at present, but THF and water are still inevitable in the esterification reaction although the degree of side reaction can be reduced in the esterification reaction process. THF is low in toxicity, but high in concentration is easily harmful to human bodies, and if THF is directly discharged to sewage treatment, THF can cause harm to bacteria in a sewage treatment system. Tetrahydrofuran (Tetrahydrofuran) is a heterocyclic organic compound with molecular formula C4H8And O. Belongs to ethers, is a complete hydrogenation product of aromatic compound furan, and is a colorless organic liquid which can be mixed and dissolved with water and has small viscosity at normal temperature and normal pressure. The chemical formula of such cyclic ethers can be written as (CH)2)4And O. It is a commonly used medium polarity aprotic solvent due to its long liquid range. Therefore, THF can be recovered and utilized as a byproduct to improve economic efficiency.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a dispersion control system for a THF recovery apparatus to solve the problems set forth in the background art described above.
The technical problem solved by the invention is realized by adopting the following technical scheme: a dispersion control system for a THF recovery apparatus, comprising: the system comprises a process control layer, an operation monitoring layer and a data service layer, wherein the process control layer is arranged at each part of the THF recovery device, and the operation monitoring layer and the data service layer are arranged in a central control room;
the process control layer consists of a process control station and a process interface unit and completes the direct control of the DCS on the process and the data acquisition, real-time storage and transmission functions of process variables;
the operation monitoring layer is a main man-machine interface of the DCS, consists of an operation station, an engineer station and a history recording workstation, is mutually independent of the control station, and processes and stores data from the process control layer to realize the function of centralized operation management;
the data service layer is an intermediate layer for data exchange between the internal network and the external network of the DCS and is used for providing data services for users indirectly participating in the production process.
The data service layer exchanges data with the process control layer and the operation monitoring layer through the proxy server or the firewall equipment, and does not directly establish data communication with the process control layer and the operation monitoring layer; data servers directly related to production operations or system management are not implemented at the data services layer.
The process control station is based on a multifunctional controller with a microprocessor, the controller is provided with a nonvolatile memory, software and field data are stored for more than 72 hours when a battery fails, and the process control station also has a battery failure alarm function.
The process interface unit comprises an I/O card, a DO card, a DI card, an AO card, an AI card, a temperature signal input card, a pressure signal input card, a flow signal input card, a communication module, a control valve assembly and a liquid level control assembly.
The operation stations are provided with hard disk drives, so that the main machines can work independently, the operation stations are provided with independent computer main machines, and the operation stations of the system can work in parallel, namely when one operation station fails, the other operation station can operate.
The engineer station is provided with a hard disk drive, so that the host can work independently, the engineer station is provided with an independent computer host, and the engineer stations of the system can work in parallel, namely when a certain engineer station fails, the engineer station can be operated by another engineer station.
The data service layer is in communication connection with a printer, the printer is installed in a central control room, and the network printer can automatically and continuously print reports, alarms and system maintenance records and can also print reports, screen pictures and configuration data tables according to command requirements.
The power supply module comprises a common power supply, and an incoming line is used for lighting of the system, a fan and power utilization of an overhaul socket; two single-phase UPS power supplies, the inlet wire is used for the system power supply.
Compared with the prior art, the invention has the beneficial effects that: the invention can recover THF in PBAT production process as byproduct to be utilized, thereby improving economic benefit, accurately controlling the whole production flow, ensuring production safety, improving byproduct production rate, and effectively realizing controllability of production process.
Drawings
FIG. 1 is a system architecture diagram of the present invention.
Detailed Description
In order to make the technical means, the characteristics, the objectives and the functions of the present invention easy to understand, the present invention will be further described with reference to the following specific drawings and embodiments.
Example 1
As shown in fig. 1, a dispersion control system for a THF recovery apparatus, comprising: the system comprises a process control layer, an operation monitoring layer and a data service layer, wherein the process control layer is arranged at each part of the THF recovery device, and the operation monitoring layer and the data service layer are arranged in a central control room; the power supply module comprises a common power supply, and an incoming line is used for lighting of the system, a fan and power utilization of an overhaul socket; two single-phase UPS power supplies, the inlet wire is used for the system power supply.
Example 2
As shown in fig. 1, a dispersion control system for a THF recovery apparatus, comprising: the system comprises a process control layer, an operation monitoring layer and a data service layer, wherein the process control layer is arranged at each part of the THF recovery device, and the operation monitoring layer and the data service layer are arranged in a central control room; the process control layer consists of a process control station and a process interface unit and completes the direct control of the DCS on the process and the data acquisition, real-time storage and transmission functions of process variables; the operation monitoring layer is a main man-machine interface of the DCS, consists of an operation station, an engineer station and a history recording workstation, is mutually independent of the control station, and processes and stores data from the process control layer to realize the function of centralized operation management; the data service layer is an intermediate layer for data exchange between the internal network and the external network of the DCS and is used for providing data services for users indirectly participating in the production process. The data service layer exchanges data with the process control layer and the operation monitoring layer through the proxy server or the firewall equipment, and does not directly establish data communication with the process control layer and the operation monitoring layer; data servers directly related to production operations or system management are not implemented at the data services layer.
Example 3
As shown in fig. 1, a dispersion control system for a THF recovery apparatus, comprising: the system comprises a process control layer, an operation monitoring layer and a data service layer, wherein the process control layer is arranged at each part of the THF recovery device, and the operation monitoring layer and the data service layer are arranged in a central control room; the process control layer consists of a process control station and a process interface unit and completes the direct control of the DCS on the process and the data acquisition, real-time storage and transmission functions of process variables; the process control station is based on a multifunctional controller with a microprocessor, the controller is provided with a nonvolatile memory, software and field data are stored for more than 72 hours when a battery fails, and the process control station also has a battery failure alarm function. The process interface unit comprises an I/O card, a DO card, a DI card, an AO card, an AI card, a temperature signal input card, a pressure signal input card, a flow signal input card, a communication module, a control valve assembly and a liquid level control assembly.
Example 4
As shown in fig. 1, a dispersion control system for a THF recovery apparatus, comprising: the system comprises a process control layer, an operation monitoring layer and a data service layer, wherein the process control layer is arranged at each part of the THF recovery device, and the operation monitoring layer and the data service layer are arranged in a central control room; the process control layer consists of a process control station and a process interface unit and completes the direct control of the DCS on the process and the data acquisition, real-time storage and transmission functions of process variables; the operation monitoring layer is a main human-computer interface of the DCS and comprises an operation station, an engineer station and a history recording work station, wherein the operation station is provided with a hard disk drive, so that a host can work independently, the operation station is provided with an independent computer host, the operation stations of the system can work in parallel, and when a certain operation station fails, the operation station can be operated by another operation station. The engineer station is provided with a hard disk drive, so that the host can work independently, the engineer station is provided with an independent computer host, and the engineer stations of the system can work in parallel, namely when a certain engineer station fails, the engineer station can be operated by another engineer station.
Example 5
As shown in fig. 1, a dispersion control system for a THF recovery apparatus, comprising: the system comprises a process control layer, an operation monitoring layer and a data service layer, wherein the process control layer is arranged at each part of the THF recovery device, and the operation monitoring layer and the data service layer are arranged in a central control room; the process control layer consists of a process control station and a process interface unit and completes the direct control of the DCS on the process and the data acquisition, real-time storage and transmission functions of process variables; the operation monitoring layer is a main man-machine interface of the DCS, consists of an operation station, an engineer station and a history recording workstation, is mutually independent of the control station, and processes and stores data from the process control layer to realize the function of centralized operation management; the data service layer is an intermediate layer for data exchange between the internal network and the external network of the DCS and is used for providing data services for users indirectly participating in the production process. The data service layer is in communication connection with a printer, the printer is installed in a central control room, and the network printer can automatically and continuously print reports, alarms and system maintenance records and can also print reports, screen pictures and configuration data tables according to command requirements.
Among the continuous and discrete control functions, the continuous process control can perform basic regulation and advanced control, and the controller should provide at least the following functions and algorithms: various PID controls (including self-tuning PID control); squaring/squaring; adding/subtracting/multiplying/dividing four arithmetic operations; carrying out piecewise linearization; lead/lag; delaying time; maximum/minimum selection; the function occurs; folding lines; program setting; signal conversion; signal amplitude limiting; selecting a signal; a rate of change limit; performing temperature and pressure mass flow compensation operation; accumulating and averaging; sampling and holding; and (4) user-defined function blocks.
In the discrete control, at least the following algorithms should be provided: controlling a switch; and, or, not logic; counting/timing; step control of a standard program; and (4) user-defined function blocks.
The operation station provides necessary display and operation pictures for the operator to monitor the production process, and can perform different operations such as monitoring, control and the like on data resources on the network according to needs and access data of any controller on the network. The operation station should have at least three levels (operator, manager, engineer) of operation authority, which is defined cryptographically. When the operation station runs the configuration software, the configuration environment of the engineer station can be provided, and the operation station has the same functions as the engineer station. Each operating station should be capable of processing at least 30000 bit numbers, 500 flow charts and 100 reports, and the refreshing time of the pictures and data does not exceed 1 second. The operator station's control and adjustment function should pop up a window of adjustment instruments through the flow chart, which should include at least PV, SV, MV bar charts, data real time trends, and a list of loop parameters including P, I, D parameter inputs. The trend display function of the operator station should include real-time trend display and historical trend display. The sampling time of the real-time trend curve is preferably 1 second, and the sampling time of the historical trend curve can be set to be 1 minute to 1 month. The operation station has perfect alarm function, and can obviously distinguish process variable alarm and system fault alarm, and can display alarm state in any picture. The alarm system can be used for randomly grading, partitioning and grouping process variable alarms, can automatically record and print alarm information and distinguish first event alarms, and the time resolution of alarm recording and displaying is not more than 10 milliseconds.
The average failure time MTTF of each device or component of the process control layer is not less than 100000 h, the average failure time MTTF of the controller is not less than 150000 h, and the total system failure rate lambda (h) of the control station is less than 1 x 10-6. The average time to failure MTBF of the operation monitoring layer device should not be less than 80000 h. The mean time to repair MTTR (excluding off-board component acquisition time) for individual devices or components of the process control layer should be less than 4 hours. The system should have complete redundancy function, and according to needs, a control unit, a power supply unit, a communication unit (including a communication medium and a communication interface), various I/O cards (except RTD and TC cards), and the like of the system should be configured as 1: 1 redundant architecture. Various plug-in cards of the system can be plugged and replaced on line. The redundant devices must be capable of online self-diagnosis, error warning, and error-free switching. The system must have perfect hardware and software fault diagnosis and self-diagnosis functions, automatically record fault alarm and prompt maintenance personnel to maintain on a maintenance picture of the DCS operation station.
The immunity of the invention is not lower than the requirements of GB/T17626.2-4 and GB/T17626.8, and the invention has the capability of automatically recovering the function after the interference source disappears. The electromagnetic radiation values of the system components and the auxiliary components should meet the requirements in SH/T3092-2013.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A dispersion control system for a THF recovery apparatus, comprising: the method is characterized in that: the system comprises a process control layer, an operation monitoring layer and a data service layer, wherein the process control layer is arranged at each part of the THF recovery device, and the operation monitoring layer and the data service layer are arranged in a central control room;
the process control layer consists of a process control station and a process interface unit and completes the direct control of the DCS to the process and the data acquisition, real-time storage and transmission functions of the process variables;
the operation monitoring layer is a main man-machine interface of the DCS, consists of an operation station, an engineer station and a history recording work station, is mutually independent of the control station, processes and stores data from the process control layer, and realizes the function of centralized operation management;
the data service layer is an intermediate layer for data exchange between the internal network and the external network of the DCS and is used for providing data services for users indirectly participating in the production process.
2. The dispersion control system for a THF recovery apparatus according to claim 1, characterized in that: the data service layer exchanges data with the process control layer and the operation monitoring layer through the proxy server or the firewall equipment, and does not directly establish data communication with the process control layer and the operation monitoring layer; data servers directly related to production operations or system management are not implemented at the data services layer.
3. The dispersion control system for a THF recovery apparatus according to claim 1, characterized in that: the process control station is based on a multifunctional controller with a microprocessor, the controller is provided with a nonvolatile memory, software and field data are stored for more than 72 hours when a battery fails, and the process control station also has a battery failure alarm function.
4. The dispersion control system for a THF recovery apparatus according to claim 1, characterized in that: the process interface unit comprises an I/O card, a DO card, a DI card, an AO card, an AI card, a temperature signal input card, a pressure signal input card, a flow signal input card, a communication module, a control valve assembly and a liquid level control assembly.
5. The dispersion control system for a THF recovery apparatus according to claim 1, characterized in that: the operation stations are provided with hard disk drives, so that the main machines can work independently, the operation stations are provided with independent computer main machines, and the operation stations of the system can work in parallel, namely when one operation station fails, the other operation station can operate.
6. The dispersion control system for a THF recovery apparatus according to claim 1, characterized in that: the engineer station is provided with a hard disk drive, so that the host can work independently, the engineer station is provided with an independent computer host, and the engineer stations of the system can work in parallel, namely when a certain engineer station fails, the engineer station can be operated by another engineer station.
7. The dispersion control system for a THF recovery apparatus according to claim 1, characterized in that: the data service layer is in communication connection with a printer, the printer is installed in a central control room, and the network printer can automatically and continuously print reports, alarms and system maintenance records and can also print reports, screen pictures and configuration data tables according to command requirements.
8. The dispersion control system for a THF recovery apparatus according to claim 1, characterized in that: the power supply module comprises a common power supply, and an incoming line is used for lighting of the system, a fan and power utilization of an overhaul socket; two single-phase UPS power supplies, the inlet wire is used for the system power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111431881.9A CN114200900A (en) | 2021-11-29 | 2021-11-29 | Dispersion control system for THF recovery device |
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| CN202111431881.9A CN114200900A (en) | 2021-11-29 | 2021-11-29 | Dispersion control system for THF recovery device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101705154A (en) * | 2009-11-11 | 2010-05-12 | 合肥工业大学 | Method for preparing ethyl ester biodiesel by cotton seed oil |
| CN106674158A (en) * | 2015-11-06 | 2017-05-17 | 南通德益化工有限公司 | Recovery technology of tetrahydrofuran |
| CN111158327A (en) * | 2020-01-10 | 2020-05-15 | 深圳市芭田生态工程股份有限公司 | Production monitoring system of production equipment |
| CN113325809A (en) * | 2020-02-28 | 2021-08-31 | 费希尔-罗斯蒙特系统公司 | Dual mode model based process control |
| CN113461644A (en) * | 2021-07-21 | 2021-10-01 | 江苏盈天化学有限公司 | Method for recovering tetrahydrofuran from waste solvent |
-
2021
- 2021-11-29 CN CN202111431881.9A patent/CN114200900A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101705154A (en) * | 2009-11-11 | 2010-05-12 | 合肥工业大学 | Method for preparing ethyl ester biodiesel by cotton seed oil |
| CN106674158A (en) * | 2015-11-06 | 2017-05-17 | 南通德益化工有限公司 | Recovery technology of tetrahydrofuran |
| CN111158327A (en) * | 2020-01-10 | 2020-05-15 | 深圳市芭田生态工程股份有限公司 | Production monitoring system of production equipment |
| CN113325809A (en) * | 2020-02-28 | 2021-08-31 | 费希尔-罗斯蒙特系统公司 | Dual mode model based process control |
| CN113461644A (en) * | 2021-07-21 | 2021-10-01 | 江苏盈天化学有限公司 | Method for recovering tetrahydrofuran from waste solvent |
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| Title |
|---|
| 郭满吉;乔飞;窦海;: "PBT废液回收焚烧处理" * |
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