CN218339010U - Automatic control system of bromine distillation tower - Google Patents
Automatic control system of bromine distillation tower Download PDFInfo
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- CN218339010U CN218339010U CN202120951344.6U CN202120951344U CN218339010U CN 218339010 U CN218339010 U CN 218339010U CN 202120951344 U CN202120951344 U CN 202120951344U CN 218339010 U CN218339010 U CN 218339010U
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- distillation tower
- bromine
- bromine distillation
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Abstract
The embodiment of the utility model provides a bromine distillation column automatic control system, include: the system comprises an image acquisition camera arranged at the position of a window of a bromine distillation tower, a temperature sensor arranged at the top of the bromine distillation tower, a chlorine valve arranged on a chlorine pipeline of the bromine distillation tower, a steam valve arranged on a steam pipeline of the bromine distillation tower, a pressure sensor arranged on an outlet pipeline of the steam valve, an industrial personal computer and a controller; the image acquisition camera is connected with the industrial personal computer; the industrial personal computer is connected with the controller; the controller is connected with the temperature sensor, the chlorine valve, the steam valve and the pressure sensor. Use the embodiment of the utility model provides a scheme can improve bromine and draw degree of automation, reduces operator's manipulation strength.
Description
Technical Field
The utility model relates to a bromine draws automatic control technical field, especially relates to a bromine distillation column automatic control system.
Background
Distillation is a very important link in bromine extraction, and the control of the distillation process determines the yield and quality of bromine to a great extent. In the traditional process, an operator observes the color change of reactants in a distillation tower through a window on the distillation tower to determine the position of a reaction section, and then adjusts the opening degree of a chlorine valve to ensure the stability of the position of the reaction section. The operation process is more subjective and depends on personal experience, so that the control process is unstable and has large fluctuation, and the yield and the quality of products are finally influenced.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a bromine distillation column automatic control system to reach the technological effect that improves bromine and draw automated production level.
The utility model discloses an aspect of implementation provides a bromine distillation column automatic control system, includes: the system comprises an image acquisition camera arranged at the position of a window of a bromine distillation tower, a temperature sensor arranged at the top of the bromine distillation tower, a chlorine valve arranged on a chlorine pipeline of the bromine distillation tower, a steam valve arranged on a steam pipeline of the bromine distillation tower, a pressure sensor arranged on an outlet pipeline of the steam valve, an industrial personal computer and a controller;
the image acquisition camera is connected with the industrial personal computer;
the industrial personal computer is connected with the controller;
the controller is connected with the temperature sensor, the chlorine valve, the steam valve and the pressure sensor.
Compared with the prior art, the beneficial effects of the utility model reside in that: by applying the scheme provided by the embodiment of the utility model, the opening degree of the steam valve is automatically adjusted by utilizing the collected temperature value in the tower and the pressure value behind the valve, so that the temperature in the tower is automatically stabilized within a certain range; and after the temperature is stable, the real-time position of the reaction section is automatically identified by using an image identification technology, and the opening of the chlorine valve is automatically adjusted by using a deviation value between the real-time position and a target position, so that the automation degree of bromine extraction is improved, and the operation intensity of an operator is reduced.
Optionally, a dark shield is sleeved outside the bromine distillation tower window and the image acquisition camera.
Optionally, the image capturing camera includes: the device comprises a first image acquisition camera arranged at the position of an upper window of the bromine distillation tower and a second image acquisition camera arranged at the position of a lower window of the bromine distillation tower.
Optionally, the controller is a PLC controller.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural diagram of an automatic control system of a bromine distillation tower provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
Referring to fig. 1, the embodiment of the present invention provides a bromine distillation tower automatic control system, including: the system comprises an image acquisition camera arranged at the position of a window of a bromine distillation tower, a temperature sensor arranged at the top of the bromine distillation tower, a chlorine valve arranged on a chlorine pipeline of the bromine distillation tower, a steam valve arranged on a steam pipeline of the bromine distillation tower, a pressure sensor arranged on an outlet pipeline of the steam valve, an industrial personal computer and a controller;
the image acquisition camera is connected with the industrial personal computer;
the industrial personal computer is connected with the controller;
the controller is connected with the temperature sensor, the chlorine valve, the steam valve and the pressure sensor.
In the implementation, the dark color shields are sleeved outside the window of the bromine distillation tower and the image acquisition camera, so that the phenomenon that the colors of the reactants in the acquired window are deviated due to the change of external natural light is avoided.
In an implementation, an image capture camera includes: the device comprises a first image acquisition camera arranged at the position of an upper window of the bromine distillation tower and a second image acquisition camera arranged at the position of a lower window of the bromine distillation tower.
In implementation, the controller is a PLC controller.
In the bromine distillation column automatic control process:
the industrial personal computer obtains a target temperature value for temperature control and a target position value for controlling the position of the reaction section, and transmits the target temperature value and the target position value to the controller;
the pressure sensor acquires a pressure value behind the steam valve and transmits the pressure value behind the steam valve to the controller;
the temperature sensor collects the temperature value in the bromine distillation tower and transmits the temperature value to the controller;
the method comprises the following steps that image acquisition equipment acquires a real-time image of a reaction between mother liquor containing HBr in a bromine distillation tower and chlorine, the real-time position of a reaction section is identified based on the color of reactants in the real-time image, the real-time position is sent to an industrial personal computer, and the industrial personal computer transmits the real-time position to a controller; in the implementation, the mother solution rich in HBr is sprayed from top to bottom, and the chlorine gas introduced from the bottom moves from bottom to top, the former is orange red, and the latter is cyan, so that the position of the reaction section of the contact of the two is easily determined by color. In this embodiment, the optimal reaction zone position is in the upper window, and the mother liquor flows downwards from the top of the tower, just passes through the upper edge of the upper window but does not pass through the center of the upper window. If the chlorine flow is large, the position of the reaction section can be upwards topped, and if the chlorine flow is small, the position of the reaction section can sink, so that the control of the position of the reaction section can be realized by adjusting the opening degree of a chlorine valve.
The controller calculates a temperature deviation value between the temperature value and the target temperature value, the temperature deviation value is used as the input of a preset temperature PID control model, and a pressure set value is calculated through the preset temperature PID control model;
calculating a pressure deviation value between a pressure set value and a post-valve pressure value, taking the pressure deviation value as an input of a preset pressure PID control model, calculating an opening set value of the steam valve through the preset pressure PID control model, and adjusting the opening of the steam valve by using the opening set value; in the implementation, the hysteresis property of the temperature and the positive correlation relationship between the temperature and the pressure are considered, so the control process introduces the pressure after the valve to form cascade PID control, namely the pressure after the valve is controlled according to the temperature difference of the tower temperature, and then the opening degree of the steam valve is controlled according to the deviation of the set value and the actual value of the pressure after the valve; specifically, the pressure in the tower is stabilized through a preset pressure PID control model, and then the temperature of the tower is controlled through the tower pressure. Wherein the deviation of the collected tower temperature and the set target temperature (82 ℃) is used as the input of a preset temperature PID control model, and the pressure set value is used as the output of the temperature PID control model; and then the deviation of the actual tower pressure and the pressure set value is used as the input of a preset pressure PID control model, and the steam valve opening set value is used as the output of the preset pressure PID control model. The input and the output are controlled by PID model parameters, so that the adjustment of the opening of the steam valve can automatically control the tower temperature to fluctuate up and down by a small margin near a set value.
In the implementation, the pressure in the tower fluctuates sharply due to poor stability of steam input, so in the process of calculating the pressure deviation value between the pressure set value and the pressure value after the valve, the average value of the pressure value after the valve within a certain time can be counted to calculate the pressure deviation value, and the influence caused by sharp fluctuation of the pressure in the tower is reduced.
And calculating a position deviation value between the real-time position and the target position, taking the position deviation value as the input of a preset chlorine PID control model, calculating to obtain an opening set value of the chlorine valve through the preset chlorine PID control model, and adjusting the opening of the chlorine valve by using the opening set value.
Specifically, the preset value temperature PID control model and the preset pressure PID control model are models obtained by setting parameters Kp, tt and Td of the initial PID control model based on a change rule that the opening of the steam valve is larger, the pressure value after the valve is larger, and the temperature value in the distillation tower is larger;
the preset chlorine PID control model is a model obtained by setting Kp, tt and Td parameters of the initial PID control model based on the control rule that the chlorine flow increasing reaction section position rises and the chlorine flow decreasing reaction section position falls.
In an implementation, the setting of the Kp, tt, td parameters of the initial PID control model includes:
setting the integral coefficient Tt to infinity, setting the differential coefficient Td to zero, canceling integral and differential actions, modifying the proportional coefficient Kp from small to large, observing the response of the system until the response speed is high and the overshoot of a certain range exists, and if the static difference of the system is within a specified range and the response curve meets the design requirement, finishing the parameter setting;
if the static difference of the system does not meet the design requirement, gradually reducing the integral coefficient Tt, observing the output of the model until the static difference of the system is gradually reduced, and the speed of eliminating the static difference meets the design requirement;
if the design requirement can not be met after the above two steps of parameter setting, gradually increasing the differential coefficient Td, observing overshoot and stability, and simultaneously correspondingly fine-adjusting the proportional coefficient Kp and the integral coefficient Tt until the static difference and the speed of system adjustment reach the design requirement.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (4)
1. An automatic control system of a bromine distillation tower, which is characterized by comprising: the system comprises an image acquisition camera arranged at the position of a window of a bromine distillation tower, a temperature sensor arranged at the top of the bromine distillation tower, a chlorine valve arranged on a chlorine pipeline of the bromine distillation tower, a steam valve arranged on a steam pipeline of the bromine distillation tower, a pressure sensor arranged on an outlet pipeline of the steam valve, an industrial personal computer and a controller;
the image acquisition camera is connected with the industrial personal computer;
the industrial personal computer is connected with the controller;
the controller is connected with the temperature sensor, the chlorine valve, the steam valve and the pressure sensor.
2. The bromine distillation tower automatic control system of claim 1, wherein a dark shield is sleeved outside the bromine distillation tower window and the image acquisition camera.
3. The bromine distillation column automatic control system of claim 1, wherein the image acquisition camera comprises: the device comprises a first image acquisition camera arranged at the position of an upper window of the bromine distillation tower and a second image acquisition camera arranged at the position of a lower window of the bromine distillation tower.
4. The bromine distillation column automatic control system of claim 1, wherein the controller is a PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202120951344.6U CN218339010U (en) | 2021-05-06 | 2021-05-06 | Automatic control system of bromine distillation tower |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120951344.6U CN218339010U (en) | 2021-05-06 | 2021-05-06 | Automatic control system of bromine distillation tower |
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| CN218339010U true CN218339010U (en) | 2023-01-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113082759A (en) * | 2021-05-06 | 2021-07-09 | 唐山海港旭宁化工有限公司 | Automatic control system and control method for bromine distillation tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113082759A (en) * | 2021-05-06 | 2021-07-09 | 唐山海港旭宁化工有限公司 | Automatic control system and control method for bromine distillation tower |
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