CN218098751U - On-line measuring device for viscosity of olefin polymer solution - Google Patents
On-line measuring device for viscosity of olefin polymer solution Download PDFInfo
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- CN218098751U CN218098751U CN202222266558.7U CN202222266558U CN218098751U CN 218098751 U CN218098751 U CN 218098751U CN 202222266558 U CN202222266558 U CN 202222266558U CN 218098751 U CN218098751 U CN 218098751U
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Abstract
The utility model discloses an olefin polymer solution viscosity on-line measuring device, pressure sensor is connected with polymerization ware and detects polymerization ware pressure in order to detect, pressure sensor and pressure regulating valve are connected with the controller electricity respectively, be responsible for line and polymerization ware's exit linkage, pressure regulating valve sets up on being responsible for the line, still include branch road pipeline, entry pipeline valve, viscosimeter entry valve, viscosity measurement appearance, viscosimeter exit valve, export pipeline valve, the one end of branch road pipeline and polymerization ware's export or be responsible for the line connection, the other end of branch road pipeline and be responsible for the line connection back, the branch road pipeline forms parallelly connected with being responsible for the line, entry pipeline valve, viscosimeter entry valve, viscosity measurement appearance, viscosimeter exit valve, export pipeline valve along the one end to the other end of branch road pipeline in proper order with branch road tube coupling. The utility model discloses can promote the measurement accuracy of olefin polymer solution viscosity, reduce the measurement deviation.
Description
Technical Field
The utility model relates to a viscosity measurement of rubber production raw and other materials, concretely relates to olefin polymer solution viscosity on-line measuring device.
Background
In the actual continuous industrial production of olefin solution polymerization, a long process flow is usually involved, the sampling detection of the quality of a polymer finished product usually has obvious time lag, and data cannot be reflected to the control of an on-site production process in time. Therefore, timely and accurate monitoring of the olefin polymerization reaction product solution is an effective means for ensuring the optimal production process control and product quality control, thereby improving the production benefit.
However, the actual production process conditions for olefin solution polymerization usually involve high temperature and high pressure, and the on-line measurement is often limited and influenced by the process conditions. The olefin polymer solution is a raw material for preparing rubber, the viscosity of the olefin polymer solution has a great influence on the quality of the rubber, and the viscosity is too low or too high, which can cause the synthesized rubber to be unqualified. Therefore, how to improve the precision of on-line measurement of the viscosity of the olefin polymer solution has important guiding value for timely adjusting the process control parameters in the polymerization production process.
Disclosure of Invention
The utility model provides an olefin polymer solution viscosity on-line measuring device, the utility model discloses can promote the measurement accuracy of olefin polymer solution viscosity, reduce the measurement deviation.
The device comprises a polymerization reactor, a main pipeline, a pressure sensor, a pressure regulating valve and a controller, wherein the pressure sensor is connected with the polymerization reactor to detect the pressure of the polymerization reactor, the pressure sensor and the pressure regulating valve are respectively electrically connected with the controller, the main pipeline is connected with an outlet of the polymerization reactor, the pressure regulating valve is arranged on the main pipeline, the device also comprises a branch pipeline, an inlet pipeline valve, a viscometer inlet valve, a viscometer outlet valve and an outlet pipeline valve, one end of the branch pipeline is connected with the outlet of the polymerization reactor or the main pipeline, the branch pipeline is connected with the main pipeline in parallel after the other end of the branch pipeline is connected with the main pipeline, and the inlet pipeline valve, the viscometer inlet valve, the viscometer outlet valve and the outlet pipeline valve are sequentially connected with the branch pipeline from one end to the other end of the branch pipeline.
During measurement, the inlet pipeline valve, the viscometer inlet valve, the viscometer outlet valve and the outlet pipeline valve are in an open state, and the viscosity measuring instrument works. The outlet pressure of the polymerization reactor is detected by a pressure sensor and then sent to a controller, the controller judges whether the pressure is in a set range, and if not, the controller controls the opening of a pressure regulating valve to be large or small, so that the pressure of the olefin polymer solution flowing into the branch pipeline is ensured. The first flow sensor provides a detection signal to the controller after detecting the flow rate of the olefin polymer solution in the branch pipeline, the controller controls the opening of the first flow regulating valve, and the flow rate of the polymer solution flowing through the viscosity measuring instrument is controlled by controlling the first flow regulating valve. The temperature of the polymer solution flowing through the viscosity meter was measured by a temperature sensor. Therefore, the viscosity of the polymer solution can be measured in real time by the viscosity measuring instrument after the proper pressure and flow are set.
Drawings
FIG. 1 is a schematic view of an on-line measuring apparatus for the viscosity of an olefin polymer solution;
reference numbers in the figures:
the device comprises a polymerization reactor A, a main pipeline B, a branch pipeline C, a flushing main pipeline D, a viscosity measuring instrument 1, a pressure sensor 2, a pressure regulating valve 3, a first flow sensor 4, a first flow regulating valve 5, a temperature sensor 6, a second flow sensor 7, a second flow regulating valve 8, an inlet pipeline valve 9, a second discharge valve 10, a viscometer inlet valve 11, a viscometer outlet valve 12, an outlet pipeline valve 13, a first discharge valve 14, a first flushing valve 15, a second flushing valve 16 and a third flushing valve 17.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the utility model discloses an olefin polymer solution viscosity on-line measuring device, including polymerization ware A, main line B, pressure sensor 2, pressure regulating valve 3, controller (not shown in the figure), pressure sensor 2 is connected with polymerization ware A in order to detect and detect polymerization ware A pressure, and pressure sensor 2 and pressure regulating valve 3 are connected with the controller electricity respectively, and main line B and polymerization ware A's exit linkage, and pressure regulating valve 3 sets up on main line B. The utility model provides a controller is the industrial computer, and the industrial computer controls the aperture that corresponding valve opened according to the signal that each sensor provided, for example the aperture increases or reduces or closes completely.
The utility model discloses still include branch road pipeline C, entry pipeline valve 9, viscosimeter inlet valve 11, viscosity measurement appearance 1, viscosimeter outlet valve 12, export pipeline valve 13, branch road pipeline C's one end and polymerization reactor A's export or be responsible for line B and be connected, branch road pipeline C's the other end and be responsible for line B and be connected the back, branch road pipeline C and be responsible for line B and form parallelly connected, entry pipeline valve 9, viscosimeter inlet valve 11, viscosity measurement appearance 1, viscosimeter outlet valve 12, export pipeline valve 13 are connected with branch road pipeline C along branch road pipeline C's one end to the other end in proper order. As the viscosity measuring instrument 1, a viscosity measuring instrument manufactured by E + H company is preferably used.
The distance between the connecting part of the branch pipeline C and the outlet of the polymerization reactor A or the main pipeline B and the outlet of the polymerization reactor A is less than 50 times of the inner diameter of the main pipeline B. The smaller the distance between the inlet line valve 9 and the polymerization reactor A, the better, but not more than 20 m at the maximum from the reactor outlet, the smaller the distance, the more accurate the measurement result can be.
The utility model discloses still include temperature sensor 6, temperature sensor 6 is connected with branch road pipeline C in order to detect the temperature of the olefin polymer solution that flows through in the branch road pipeline C, and temperature sensor 6 still is connected with the controller electricity.
The utility model also comprises a first flow sensor 4 and a first flow regulating valve 5, wherein the first flow sensor 4 is used for detecting the flow of the olefin polymer solution in the branch pipeline C, and the first flow sensor 4 is electrically connected with the controller; the controller is electrically connected to the first flow rate adjustment valve 5 to adjust the opening degree of the first flow rate adjustment valve 5.
During measurement, the inlet pipeline valve 9, the viscometer inlet valve 11, the viscometer outlet valve 12 and the outlet pipeline valve 13 are in an open state, and the viscosity measuring instrument 1 works. The pressure at the outlet of the polymerization reactor A is detected by the pressure sensor 2 and then sent to the controller, the controller judges whether the pressure is in the set range, if not, the controller controls the pressure regulating valve 3 to be opened or closed, thereby ensuring the pressure of the olefin polymer solution flowing into the branch pipeline C. The first flow sensor 4 provides a detection signal to the controller after detecting the flow rate of the olefin polymer solution in the branch line C, and the controller controls the opening of the first flow regulating valve 5 to control the flow rate of the polymer solution flowing through the viscosity measuring instrument 1 by controlling the first flow regulating valve 5. The temperature of the polymer solution flowing through the viscosity meter 1 is measured by the temperature sensor 6. Therefore, the viscosity measuring instrument 1 can measure the viscosity of the polymer solution in real time by setting an appropriate pressure and flow rate.
Table 1 shows the on-line measurement of the viscosity of the ethylene propylene diene terpolymer solution using the on-line measurement apparatus for the viscosity of the olefin polymer solution of this example. Compared with the traditional rotor viscometer, the online measurement device for the viscosity of the olefin polymer solution of the embodiment has smaller measurement standard deviation value, and can reflect the viscosity of the olefin polymer solution more accurately.
TABLE 1
The utility model discloses applicable viscosity measurement scope includes 0.5 to 6000 mPas, preferably 20 to 3000 mPas, more preferably 50 to 2500 mPas
When measuring some polymer solutions, the easy scale deposit of viscosity measuring apparatu 1 device inside and pipeline, consequently the utility model discloses in set up the flushing assembly, the flushing assembly includes: the flushing device comprises a main flushing pipeline D, a second flow sensor 7, a second flow regulating valve 8, a first flushing valve 15 and a first discharge valve 14, wherein the main flushing pipeline D is arranged in parallel with a branch pipeline C, the second flow sensor 7 is arranged on the main flushing pipeline D, and the second flow sensor 7 is electrically connected with a controller; the second flow regulating valve 8 is arranged on the flushing main pipeline D, and the second flow regulating valve 8 is electrically connected with the controller; one end of the first flushing valve 15 is connected with a main flushing pipeline D, and the other end of the first flushing valve 15 is connected with a branch pipeline C; one end of the first discharge valve 14 is connected to the branch line C, the other end of the first discharge valve 14 is a free end, and the first discharge valve 14 is connected in parallel to the outlet line valve 13.
In this embodiment, the connection of the first flush valve 15 to the main flush line D is located upstream of the viscometer inlet valve 11 and the first drain valve 14 is located downstream of the viscometer outlet valve 12.
The flushing assembly further comprises a second flushing valve 16 and a second discharge valve 10, one end of the second flushing valve 16 is connected with the flushing main pipeline D, the other end of the second flushing valve 16 is connected with the branch pipeline C, the part of the second flushing valve 16 connected with the branch pipeline C is located at the downstream of the viscometer outlet valve 12, one end of the second discharge valve 10 is connected with the branch pipeline C, and the second discharge valve 10 is located at the upstream of the viscometer inlet valve 11.
The flushing assembly further comprises a third flushing valve 17, one end of the third flushing valve 17 is connected with the flushing main pipeline D, the other end of the third flushing valve 17 is connected with the branch pipeline C, and the part of the third flushing valve 17 connected with the branch pipeline C is located on the downstream of the part of the second flushing valve 16 connected with the branch pipeline C.
After the flushing solvent is input into the flushing main pipeline D, the second flow sensor 7 detects the flow of the flushing solvent in the flushing main pipeline D, and provides a detection signal for the controller, the controller outputs a control signal to control the opening degree of the second flow regulating valve 8, and the flushing solvent flowing out of the second flow regulating valve 8 has the following flow paths, specifically as follows:
in the step (1), the first flush valve 15, the viscometer inlet valve 11, the viscometer 1, the viscometer outlet valve 12, the first flow rate adjustment valve 5, and the first drain valve 14 are opened, the inlet line valve 9, the second drain valve 10, the second flush valve 16, the third flush valve 17, and the outlet line valve 13 are all closed, and at this time, the flush solvent flows through the first flush valve 15, the viscometer inlet valve 11, the viscometer 1, the viscometer outlet valve 12, the first flow rate adjustment valve 5, and the first drain valve 14 in this order, and is finally discharged from the first drain valve 14.
And (2) enabling the first flushing valve 15, the viscometer inlet valve 11, the viscosity meter 1, the viscometer outlet valve 12, the first flow regulating valve 5 and the outlet pipeline valve 13 to be in an open state, enabling the inlet pipeline valve 9, the second discharge valve 10, the second flushing valve 16, the third flushing valve 17 and the first discharge valve 14 to be in a closed state, and enabling the flushing solvent to sequentially flow through the first flushing valve 15, the viscometer inlet valve 11, the viscosity meter 1, the viscometer outlet valve 12, the first flow regulating valve 5 and the outlet pipeline valve 13 and finally enter the main pipeline B.
And (3) enabling the second flushing valve 16, the viscometer outlet valve 12, the viscometer 1, the viscometer inlet valve 11 and the second discharge valve 10 to be in an open state, enabling the inlet pipeline valve 9, the outlet pipeline valve 13, the first flow regulating valve 5, the first discharge valve 14, the first flushing valve 15 and the third flushing valve 17 to be in a closed state, and enabling the flushing solvent to sequentially flow through the second flushing valve 16, the viscometer outlet valve 12, the viscometer 1, the viscometer inlet valve 11 and the second discharge valve 10 and finally be discharged from the second discharge valve 10.
And (4) enabling the second flushing valve 16, the viscometer outlet valve 12, the viscosity meter 1, the viscometer inlet valve 11 and the inlet pipeline valve 9 to be in an open state, enabling the second discharge valve 10, the outlet pipeline valve 13, the first flow regulating valve 5, the first discharge valve 14, the first flushing valve 15 and the third flushing valve 17 to be in a closed state, and enabling the flushing solvent to sequentially flow through the second flushing valve 16, the viscometer outlet valve 12, the viscosity meter 1, the viscometer inlet valve 11 and the inlet pipeline valve 9 and finally enter the main pipeline B.
And (5) opening the third flushing valve 17, the first flow regulating valve 5, the viscometer outlet valve 12, the viscometer 1, the viscometer inlet valve 11 and the second drain valve 10, closing the inlet line valve 9, the outlet line valve 13, the first drain valve 14, the first flushing valve 15 and the second flushing valve 16, and discharging the flushing solvent from the second drain valve 10 after the flushing solvent sequentially flows through the third flushing valve 17, the first flow regulating valve 5, the viscometer outlet valve 12, the viscometer 1, the viscometer inlet valve 11 and the second drain valve 10.
And (6) enabling the third flushing valve 17, the first flow regulating valve 5, the viscometer outlet valve 12, the viscosity meter 1, the viscometer inlet valve 11 and the inlet pipeline valve 9 to be in an open state, enabling the second discharge valve 10, the outlet pipeline valve 13, the first discharge valve 14, the first flushing valve 15 and the second flushing valve 16 to be in a closed state, and enabling the flushing solvent to sequentially flow through the third flushing valve 17, the first flow regulating valve 5, the viscometer outlet valve 12, the viscosity meter 1, the viscometer inlet valve 11 and the inlet pipeline valve 9 and finally enter the main pipeline B.
The flushing modes can be combined for use to form forward flushing and backward flushing, so that the flushing of pipelines and valves is more clean.
Claims (8)
1. The device for online measuring the viscosity of the olefin polymer solution comprises a polymerization reactor (A), a main pipeline (B), a pressure sensor (2), a pressure regulating valve (3) and a controller, wherein the pressure sensor (2) is connected with the polymerization reactor (A) to detect and detect the pressure of the polymerization reactor (A), the pressure sensor (2) and the pressure regulating valve (3) are respectively electrically connected with the controller, the main pipeline (B) is connected with an outlet of the polymerization reactor (A), the pressure regulating valve (3) is arranged on the main pipeline (B), it is characterized by also comprising a branch pipeline (C), an inlet pipeline valve (9), a viscometer inlet valve (11), a viscometer (1), a viscometer outlet valve (12) and an outlet pipeline valve (13), wherein one end of the branch pipeline (C) is connected with the outlet of the polymerization reactor (A) or the main pipeline (B), after the other end of the branch pipeline (C) is connected with the main pipeline (B), the branch pipeline (C) is connected with the main pipeline (B) in parallel, the inlet pipeline valve (9), the viscometer inlet valve (11), the viscometer (1), the viscometer outlet valve (12) and the outlet pipeline valve (13) are sequentially connected with the branch pipeline (C) from one end to the other end of the branch pipeline (C).
2. The olefin polymer solution viscosity on-line measuring device according to claim 1, characterized in that: the distance between the connecting part of the branch pipeline (C) and the outlet of the polymerization reactor (A) or the main pipeline (B) and the outlet of the polymerization reactor (A) is less than 50 times of the inner diameter of the main pipeline (B).
3. The olefin polymer solution viscosity on-line measuring device according to claim 1, further comprising a temperature sensor (6), wherein the temperature sensor (6) is connected to the branch line (C) to detect the temperature of the olefin polymer solution flowing through the branch line (C), and the temperature sensor (6) is further electrically connected to the controller.
4. The olefin polymer solution viscosity on-line measuring device according to claim 1, further comprising:
a first flow sensor (4) for detecting the flow rate of the olefin polymer solution in the branch pipeline (C), wherein the first flow sensor (4) is electrically connected with the controller;
and the controller is electrically connected with the first flow regulating valve (5) to regulate the opening degree of the first flow regulating valve (5).
5. The olefin polymer solution viscosity on-line measuring device of claim 1, further comprising a flushing assembly, wherein the flushing assembly comprises:
a flushing main line (D);
the second flow sensor (7), the second flow sensor (7) is arranged on the flushing main pipeline (D), and the second flow sensor (7) is electrically connected with the controller;
the second flow regulating valve (8), the second flow regulating valve (8) is arranged on the flushing main pipeline (D), and the second flow regulating valve (8) is electrically connected with the controller;
one end of the first flushing valve (15) is connected with the main flushing pipeline (D), and the other end of the first flushing valve (15) is connected with the branch pipeline (C);
and one end of the first discharge valve (14) is connected with the branch pipeline (C).
6. The olefin polymer solution viscosity on-line measuring device according to claim 5, characterized in that the connection position of the first flushing valve (15) and the main flushing pipeline (D) is positioned at the upstream of the inlet valve (11) of the viscometer, and the first discharge valve (14) is positioned at the downstream of the outlet valve (12) of the viscometer.
7. The olefin polymer solution viscosity on-line measuring device of claim 5 or 6, characterized in that the flushing component further comprises a second flushing valve (16) and a second discharge valve (10), one end of the second flushing valve (16) is connected with the main flushing pipeline (D), the other end of the second flushing valve (16) is connected with the branch pipeline (C), the connection position of the second flushing valve (16) and the branch pipeline (C) is located at the downstream of the viscometer outlet valve (12), one end of the second discharge valve (10) is connected with the branch pipeline (C), and the second discharge valve (10) is located at the upstream of the viscometer inlet valve (11).
8. The olefin polymer solution viscosity on-line measuring device of claim 7, characterized in that the flushing component further comprises a third flushing valve (17), one end of the third flushing valve (17) is connected with the main flushing pipeline (D), the other end of the third flushing valve (17) is connected with the branch pipeline (C), and the connecting part of the third flushing valve (17) and the branch pipeline (C) is positioned at the downstream of the connecting part of the second flushing valve (16) and the branch pipeline (C).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222266558.7U CN218098751U (en) | 2022-08-26 | 2022-08-26 | On-line measuring device for viscosity of olefin polymer solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222266558.7U CN218098751U (en) | 2022-08-26 | 2022-08-26 | On-line measuring device for viscosity of olefin polymer solution |
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|---|---|
| CN218098751U true CN218098751U (en) | 2022-12-20 |
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| CN202222266558.7U Active CN218098751U (en) | 2022-08-26 | 2022-08-26 | On-line measuring device for viscosity of olefin polymer solution |
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| CN (1) | CN218098751U (en) |
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2022
- 2022-08-26 CN CN202222266558.7U patent/CN218098751U/en active Active
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