CN110618233A - On-line esterification rate analyzer - Google Patents
On-line esterification rate analyzer Download PDFInfo
- Publication number
- CN110618233A CN110618233A CN201810627019.7A CN201810627019A CN110618233A CN 110618233 A CN110618233 A CN 110618233A CN 201810627019 A CN201810627019 A CN 201810627019A CN 110618233 A CN110618233 A CN 110618233A
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- China
- Prior art keywords
- control panel
- control
- esterification rate
- detector
- storage unit
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- 230000032050 esterification Effects 0.000 title claims abstract description 33
- 238000005886 esterification reaction Methods 0.000 title claims abstract description 33
- 238000004364 calculation method Methods 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 229920000728 polyester Polymers 0.000 claims abstract description 14
- 238000004458 analytical method Methods 0.000 claims abstract description 12
- 230000003993 interaction Effects 0.000 claims description 6
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000012863 analytical testing Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012821 model calculation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
-
- 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]
- G05B19/41875—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 quality surveillance of production
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- 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)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Manufacturing & Machinery (AREA)
- Medicinal Chemistry (AREA)
- Quality & Reliability (AREA)
- Food Science & Technology (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
Abstract
The invention discloses an on-line esterification rate analyzer, which comprises: the detector is arranged on the polyester material pipeline and used for collecting and detecting material data in the polyester material pipeline in real time; the detector is provided with a 485 serial port, and the material data is sent to the control panel in an MODBUS protocol form through the 485 serial port; the control panel is provided with a control calculation unit and a storage unit; the control calculation unit is used for carrying out real-time calculation analysis on the detection data and obtaining a calculation result; the storage unit is used for storing the detection data and the operation result obtained by the control operation unit; the DCS control system is connected with the control panel through a shielding cable, and the control panel sends the operation result to the DCS control system through the shielding cable at a current of 4-20 mA. The invention has simple structure and easy realization; the labor cost can be reduced, and the esterification rate control scheme can be adjusted in real time based on the detection data.
Description
Technical Field
The invention belongs to the technical field of petrochemical polyester industry, and particularly relates to an online esterification rate analyzer.
Background
In the petrochemical polyester industry, the content of terminal carboxyl groups (-COOH) is an important index for representing the quality of slices, and the quality of products and the direct economic benefit of enterprises are directly influenced by the content of the terminal carboxyl groups (-COOH). During the polymerization, the control of the esterification rate is the most important and direct means for ensuring the content of terminal carboxyl groups (-COOH) in the chips. In the conventional scheme, the esterification rate can only be obtained by sampling and analyzing by an examiner periodically, the analysis frequency is 1 time/shift (8 hours), the analysis time is more than 2 hours, and errors of analysis equipment, artificial factors, operation and sampling methods and the like exist. When the esterification rate data is abnormal, real data or analysis errors cannot be judged in time, the control scheme is adjusted according to the result through sampling analysis and cannot be in place at one time, the control fluctuation of the actual esterification rate is large, a large number of defective products can occur, and great loss is caused to a factory. In addition, the process of analytical testing requires personnel to be scheduled for regular shifts, which consumes a significant amount of labor cost. Therefore, how to develop a novel online esterification rate analyzer, which can acquire the detection data in real time and adjust the control scheme accordingly according to the detection data, and effectively reduce the labor cost is the direction that the skilled person needs to research.
Disclosure of Invention
The invention aims to provide an online esterification rate analyzer which can reduce the labor cost and realize real-time adjustment of an esterification rate control scheme based on detection data.
The specific technical scheme adopted is as follows:
an on-line esterification rate analyzer, comprising: the detector is arranged on the polyester material pipeline and used for collecting and detecting material data in the polyester material pipeline in real time; the detector is provided with a 485 serial port, and the material data is sent to the control panel in an MODBUS protocol form through the 485 serial port; the control panel is internally provided with a control calculation unit and a storage unit; the control calculation unit is used for carrying out real-time calculation analysis on the detection data and obtaining a calculation result; the storage unit is used for storing the detection data and the operation result obtained by the control operation unit; the DCS control system is connected with the control panel through a shielding cable, and the control panel sends the operation result to the DCS control system through the shielding cable at a current of 4-20 mA.
By adopting the technical scheme: the material data collected by the detector is output to the control panel in real time, a module unit in the control panel carries out real-time operation analysis according to the material data and feeds back an analysis result to the DCS control system, and the DCS control system correspondingly adjusts the esterification rate control scheme according to the fed-back analysis result, so that the real-time adjustment of the esterification rate control scheme is realized, the problems in the prior art are solved, and the working efficiency is greatly improved.
Preferably, in the above on-line esterification ratio analyzer: the detector is connected with the control panel through a shielded cable; the detector sends material data to the control panel through a shielded cable at a current of 4-20 mA.
By adopting the technical scheme: the shielded cable is used for transmitting signals and is taken as a precaution measure for communication faults, and the real-time performance and the effectiveness of data analysis and calculation are guaranteed.
More preferably, in the above on-line esterification ratio analyzer: the control panel is also provided with an information interaction device which is used for accessing the storage unit and reading and displaying the detection data and the operation result stored in the storage unit. Further preferred are: the information interaction device is formed by adopting a touch screen.
By adopting the technical scheme: engineers can inquire the historical data of the flow, the density, the temperature, the esterification rate value and the like of the materials on the touch screen at any time, and fine-tune calibration is carried out on the esterification rate value at any time according to judgment. And sending the calibrated parameters such as the esterification rate value, the flow of the materials and the like into a Distributed Control System (DCS) for an operator to monitor in a form of 4-20 mA current signals through a cable.
Compared with the prior art, the invention has simple structure and easy realization; the labor cost can be reduced, and the esterification rate control scheme can be adjusted in real time based on the detection data.
Drawings
The invention will be described in further detail with reference to the following detailed description and accompanying drawings:
FIG. 1 is a schematic structural view of example 1 of the present invention;
figure 2 is a process flow diagram implemented using the technical solution of example 1.
The correspondence between each reference numeral and the part name is as follows:
1. a detector; 2. a control panel; 3. a DCS control system; 4. a shielded cable.
Detailed Description
In order to more clearly illustrate the technical solution of the present invention, the following will be further described with reference to various embodiments.
FIG. 1 shows example 1 of the present invention:
an on-line esterification rate analyzer, comprising: the device comprises a detector 1, a control panel 2 and a DCS control system 3, wherein the detector 1 is arranged on a polyester material pipeline and is used for collecting and detecting material data in the polyester material pipeline in real time; the detector 1 is provided with a 485 serial port, and the material data is sent to the control panel 2 in an MODBUS protocol form through the 485 serial port; the control panel 2 is internally provided with a control calculation unit and a storage unit; the control calculation unit is used for carrying out real-time calculation analysis on the detection data and obtaining a calculation result; the storage unit is used for storing the detection data and the operation result obtained by the control operation unit; the DCS control system 3 is connected with the control panel 2 through a shielding cable 4, and the control panel 2 sends an operation result to the DCS control system 3 through the shielding cable 4 at a current of 4-20 mA.
In order to prevent communication faults, a shielding cable 4 is also arranged between the detector 1 and the control panel 2 and is connected with each other; the detector 1 sends material data to the control panel 2 through the shielded cable 4 at a current of 4-20 mA. And the control panel 2 is also provided with an information interaction device which is used for accessing the storage unit and reading and displaying the detection data and the operation result stored in the storage unit. The information interaction device can be formed by adopting a touch screen. Other devices having the same function may be selected.
The working process is as follows:
firstly, an industry expert sums up the standard value of the esterification rate of the current material according to the types of polyester materials and products according to industry experience for many years. After the analyzer control calculation unit receives signals of flow, temperature, density and the like of materials, a primary online esterification rate real-time value is obtained by combining standard values provided by experts in the polyester industry and calculating through a formula of a series of empirical models: (t, P, ρ, L, F) + standard value model calculation + empirical coefficient = real-time value of online esterification rate. After the real-time value of the on-line esterification rate is obtained through calculation, the final value of the esterification rate is obtained through processing such as filtering, fine tuning and calibration, and the like, and the final value is output to a touch screen of a module calculation unit and an item distributed control system for monitoring by an engineer. In practice, the working conditions of the polyester materials are different according to the difference of the field production process. Therefore, by adopting the scheme, according to the investigation condition of the production process, a standard value corresponding to the material and the working condition is provided by combining with the industry experience. The product integrates the standard value into a calculation formula of the esterification rate, so that the calculation error of the esterification rate is effectively reduced, and the calculation result is customized for the actual polyester material of a factory.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. The protection scope of the present invention is subject to the protection scope of the claims.
Claims (4)
1. An on-line esterification rate analyzer, characterized by comprising: the device comprises a detector (1), a control panel (2) and a DCS control system (3), wherein the detector (1) is installed on a polyester material pipeline and used for collecting and detecting material data in the polyester material pipeline in real time;
the detector (1) is provided with a 485 serial port, and the material data is sent to the control panel (2) in an MODBUS protocol form through the 485 serial port;
a control calculation unit and a storage unit are arranged in the control panel (2); the control calculation unit is used for carrying out real-time calculation analysis on the detection data and obtaining a calculation result; the storage unit is used for storing the detection data and the operation result obtained by the control operation unit;
DCS control system (3) is connected through shielded cable (4) between control panel (2), control panel (2) are through shielded cable (4) with 4 ~ 20mA electric current with the operation result send DCS control system (3).
2. The on-line esterification rate analyzer according to claim 1, wherein: the detector (1) is connected with the control panel (2) through a shielded cable (4); the detector (1) sends material data to the control panel (2) through the shielded cable (4) with 4-20 mA current.
3. The on-line esterification rate analyzer according to claim 1, wherein: the control panel (2) is also provided with an information interaction device which is used for accessing the storage unit and reading and displaying the detection data and the operation result stored in the storage unit.
4. The on-line esterification rate analyzer according to claim 2, wherein: the information interaction device is formed by adopting a touch screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810627019.7A CN110618233A (en) | 2018-06-19 | 2018-06-19 | On-line esterification rate analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810627019.7A CN110618233A (en) | 2018-06-19 | 2018-06-19 | On-line esterification rate analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110618233A true CN110618233A (en) | 2019-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810627019.7A Pending CN110618233A (en) | 2018-06-19 | 2018-06-19 | On-line esterification rate analyzer |
Country Status (1)
| Country | Link |
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| CN (1) | CN110618233A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1552753A (en) * | 2003-05-30 | 2004-12-08 | 华东理工大学 | Soft measure for polyester product quality target and process operating optimization method |
| CN101915742A (en) * | 2010-08-10 | 2010-12-15 | 北京路源光科技有限公司 | Raman technology based biodiesel on-line detector |
| CN203688530U (en) * | 2014-01-02 | 2014-07-02 | 沈阳大学 | Intelligent detection device of polyester esterification rate |
| CN207216404U (en) * | 2017-05-17 | 2018-04-10 | 扬州君禾薄膜科技有限公司 | The network automatically control device of Pet Production Line |
-
2018
- 2018-06-19 CN CN201810627019.7A patent/CN110618233A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1552753A (en) * | 2003-05-30 | 2004-12-08 | 华东理工大学 | Soft measure for polyester product quality target and process operating optimization method |
| CN101915742A (en) * | 2010-08-10 | 2010-12-15 | 北京路源光科技有限公司 | Raman technology based biodiesel on-line detector |
| CN203688530U (en) * | 2014-01-02 | 2014-07-02 | 沈阳大学 | Intelligent detection device of polyester esterification rate |
| CN207216404U (en) * | 2017-05-17 | 2018-04-10 | 扬州君禾薄膜科技有限公司 | The network automatically control device of Pet Production Line |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Room 238, 2nd Building, 9th Building, 62 Zhongshan Road, Songjiang District, Shanghai 201600 Applicant after: Shanghai Fuling Automation Control System Co.,Ltd. Address before: Room 238, 2nd Building, 9th Building, 62 Zhongshan Road, Songjiang District, Shanghai 201600 Applicant before: SHANGHAI FL-AUTOMATION Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191227 |