CN211577750U - TDA reation kettle pressure control device - Google Patents
TDA reation kettle pressure control device Download PDFInfo
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- CN211577750U CN211577750U CN201922474303.8U CN201922474303U CN211577750U CN 211577750 U CN211577750 U CN 211577750U CN 201922474303 U CN201922474303 U CN 201922474303U CN 211577750 U CN211577750 U CN 211577750U
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Abstract
The utility model discloses a TDA reaction kettle pressure control device, which comprises a pressure sensor, a controller, a frequency converter and an electric control valve, wherein the pressure sensor is used for detecting the air pressure in a reaction kettle body, and converted into electric signals to be output to a signal regulating unit for processing, the signal regulating unit comprises a filter adjustable circuit and a reference stabilizing circuit, the controller controls the working state of the electric control valve through a frequency converter, the filter adjustable circuit eliminates interference clutter in the detection signals by utilizing the principle of a double-T band elimination filter, the influence of the self mechanical vibration interference of the pressure sensor on the air pressure detection is effectively avoided, the reference stabilizing circuit further stabilizes the output signals of the filter adjustable circuit, and the detection signal is isolated and output by utilizing the voltage follower principle, the stability of air pressure detection is improved, the anti-interference capability is strong, and the accuracy of the TDA reaction kettle pressure control is greatly improved.
Description
Technical Field
The utility model relates to a reation kettle control technical field especially relates to a TDA reation kettle pressure control device.
Background
The reaction kettle is a container provided with physical or chemical reaction, realizes the heating, evaporation, cooling and low-speed mixing functions required by the process by the structural design and parameter configuration of the container, and is reaction equipment commonly used in chemical plants. In the working process of the reaction kettle, the pressure in the kettle body needs to be strictly controlled, so that the safety and stability of the reaction process are ensured. For example, in the synthesis process of diethyltoluenediamine (DETDA), gas is required to be introduced through an electric control valve, and the pressure in the reaction kettle body is ensured to be stable. Wherein, pressure sensor in the reation kettle is responsible for detecting the internal atmospheric pressure of jar, but the internal chemical reaction of jar arouses the pressure source unstable, and pressure sensor itself has mechanical vibration to disturb, causes atmospheric pressure to detect unstablely, and anti-interference ability is not strong, influences TDA reation kettle pressure control accuracy.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
In view of the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a pressure control device for a TDA reaction kettle.
The technical scheme for solving the problem is as follows: the utility model provides a TDA reation kettle pressure control device, includes pressure sensor, controller, converter and automatically controlled valve, pressure sensor is used for detecting internal atmospheric pressure of reation kettle jar to convert the signal of telecommunication into and handle in exporting the signal conditioning unit, the signal conditioning unit includes adjustable filter circuit and benchmark stabilizing circuit, the adjustable filter circuit's of filter input is connected pressure sensor's output, the adjustable filter circuit's of filter output is connected benchmark stabilizing circuit's input, benchmark stabilizing circuit's output is connected the controller, the controller passes through the operating condition of the automatically controlled valve of converter control.
Further, the filtering adjustable circuit comprises a capacitor C1, one end of the capacitor C1 is connected to the output end of the pressure sensor, the other end of the capacitor C1 is connected to one ends of the resistor R2 and the capacitor C2, and is grounded through a resistor R1, the other end of the resistor R2 is connected to one ends of the resistor R3 and the capacitor C4, the other end of the capacitor C2 is connected to one ends of the capacitor C3 and the adjustable resistor RP1, the other ends of the resistor R3 and the capacitor C3 are connected to the non-inverting input end of the operational amplifier AR1, the inverting input end and the output end of the operational amplifier AR1 are connected to one end of the adjustable resistor RP2 through a resistor R4, the other end of the adjustable resistor RP2 is grounded, the sliding end of the adjustable resistor RP2 is connected to the non-inverting input end of the operational amplifier AR2, and the inverting input end and the output end of the operational amplifier.
Further, the reference stabilizing circuit comprises a voltage stabilizing diode DZ1, the cathode of the voltage stabilizing diode DZ1 is connected with the output end of the operational amplifier AR1, the anode of the voltage stabilizing diode DZ1 is connected with one end of a resistor R5, a resistor R6, a capacitor C5 and the non-inverting input end of the operational amplifier AR3, the other end of the resistor R5 is connected with a +5V power supply, the other ends of the resistor R6 and the capacitor C5 are grounded, and the inverting input end of the operational amplifier AR3 is connected with the output end of the operational amplifier AR3 and the controller through the resistor R7.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the filter adjustable circuit eliminates interference clutter in a detection signal by using a double-T band-stop filter principle, effectively avoids the influence of self mechanical vibration interference of the pressure sensor P1 on air pressure detection, and changes the Q value of the filter adjustable circuit by adjusting the resistance values of the adjustable resistors RP1 and RP2, so that the noise interference is eliminated to the maximum extent, the use and the adjustment are convenient, and the application range is wide;
2. the reference stabilizing circuit further stabilizes the output signal of the filter adjustable circuit, and utilizes the voltage follower principle to isolate the output of the detection signal, thereby improving the stability of air pressure detection, having strong anti-interference capability and greatly improving the accuracy of the pressure control of the TDA reaction kettle.
Drawings
Fig. 1 is a schematic diagram of the filter adjustable circuit of the present invention.
Fig. 2 is a schematic diagram of the reference stabilization circuit of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings 1 to 2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
A TDA reaction kettle pressure control device comprises a pressure sensor P1, a controller, a frequency converter and an electric control valve. The pressure sensor P1 is used for detecting the internal atmospheric pressure of reation kettle jar to convert into the signal of telecommunication and export and handle in the signal conditioning unit, the signal conditioning unit includes filtering adjustable circuit and benchmark stabilizing circuit, the output of pressure sensor P1 is connected to filtering adjustable circuit's input, filtering adjustable circuit's output is connected the input of benchmark stabilizing circuit, the output connection controller of benchmark stabilizing circuit, the controller passes through the operating condition of converter control electric control valve.
In order to improve the air pressure detection precision in the reaction kettle tank body, firstly, a detection signal of the pressure sensor P1 is sent to a filtering adjustable circuit for processing. As shown in fig. 1, the filtering adjustable circuit includes a capacitor C1, one end of a capacitor C1 is connected to the output end of the pressure sensor P1, the other end of a capacitor C1 is connected to one end of a resistor R2 and one end of a capacitor C2, and is grounded through a resistor R1, the other end of the resistor R2 is connected to one end of a resistor R3 and one end of a capacitor C4, the other end of a capacitor C2 is connected to one end of a capacitor C3 and one end of an adjustable resistor RP1, the other ends of a resistor R3 and a capacitor C3 are connected to the non-inverting input end of an operational amplifier AR1, the inverting input end and the output end of the operational amplifier AR1 are connected to one end of an adjustable resistor RP2 through a resistor R4, the other end of an adjustable resistor RP2 is grounded, the sliding end of the adjustable resistor RP2 is connected to the non-inverting input end of the operational amplifier AR 86.
After being coupled by a capacitor C1, a detection signal of the pressure sensor P1 is sent to an R active double-T filter network consisting of capacitors C2-C3, resistors R2, R3 and an adjustable resistor RP1 for filtering, and operational amplifiers AR1 and AR2 are connected in series to form positive feedback regulation on the filtering. Interference clutter in the detection signals can be eliminated by utilizing the principle of the double-T band elimination filter, and the influence of self mechanical vibration interference of the pressure sensor P1 on air pressure detection is effectively avoided. Because the frequency of interference signals bred by the pressure sensors P1 of different models is different, the Q value of the filtering adjustable circuit can be changed by adjusting the resistance values of the adjustable resistors RP1 and RP2, so that the noise interference is eliminated to the maximum extent, the use and the adjustment are convenient, and the application range is wide.
As shown in fig. 2, the reference stabilizing circuit includes a zener diode DZ1, a cathode of the zener diode DZ1 is connected to an output terminal of the operational amplifier AR1, an anode of the zener diode DZ1 is connected to one end of the resistors R5, R6, the capacitor C5 and a non-inverting input terminal of the operational amplifier AR3, the other end of the resistor R5 is connected to a +5V power supply, the other ends of the resistor R6 and the capacitor C5 are grounded, and an inverting input terminal of the operational amplifier AR3 is connected to an output terminal of the operational amplifier AR3 and the controller through the resistor R7.
After the output signal of the filter adjustable circuit is stabilized in amplitude through a voltage stabilizing diode DZ1, the resistors R5 and R6 divide the voltage of the +5V power supply by adopting a series voltage dividing principle, so that a reference voltage is applied to the stabilized signal, the air pressure detection signal is subjected to a recognition standard, and the capacitor C5 stabilizes the reference voltage. And finally, the operational amplifier AR3 adopts the voltage follower principle to isolate and output the detection signal, thereby well ensuring the stability of the controller for receiving the detection signal and avoiding the interference on the receiving end of the controller.
The utility model discloses when specifically using, the internal atmospheric pressure of pressure sensor P1 real-time detection reation kettle jar, the adjustable circuit of filtering utilizes the interference clutter of two T band elimination filter principles in to the detected signal to eliminate, effectively avoids pressure sensor P1 self mechanical vibration to disturb the influence that detects to atmospheric pressure. The Q value of the filter adjustable circuit is changed by adjusting the resistance values of the adjustable resistors RP1 and RP2, so that the noise interference is eliminated to the maximum extent, the use and the adjustment are convenient, and the application range is wide. The reference stabilizing circuit further stabilizes the output signal of the filtering adjustable circuit, and utilizes the voltage follower principle to isolate and output the detection signal, thereby improving the stability of air pressure detection. The controller compares the output signal value of the signal regulating unit with a set value and controls the opening and closing state of the electric control valve through the frequency converter according to the comparison difference value, so that constant-pressure operation in the management of the reaction kettle is realized. The utility model discloses to jar internal gas pressure detection accuracy, the interference killing feature is strong, has greatly improved the accuracy to TDA reation kettle pressure control.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (3)
1. The utility model provides a TDA reation kettle pressure control device, includes pressure sensor, controller, converter and electric control valve, its characterized in that: the pressure sensor is used for detecting the internal atmospheric pressure of reation kettle jar to convert the signal of telecommunication into and handle in exporting the signal conditioning unit, the signal conditioning unit includes filtering adjustable circuit and benchmark stabilizing circuit, filtering adjustable circuit's input is connected pressure sensor's output, filtering adjustable circuit's output is connected benchmark stabilizing circuit's input, benchmark stabilizing circuit's output is connected the controller, the controller passes through the operating condition of converter control electric control valve.
2. The TDA reactor pressure control apparatus of claim 1, wherein: the filtering adjustable circuit comprises a capacitor C1, one end of a capacitor C1 is connected with the output end of the pressure sensor, the other end of a capacitor C1 is connected with one ends of a resistor R2 and a capacitor C2 and is grounded through a resistor R1, the other end of the resistor R2 is connected with one ends of a resistor R3 and a capacitor C4, the other end of a capacitor C2 is connected with one ends of a capacitor C3 and an adjustable resistor RP1, the other ends of the resistor R3 and the capacitor C3 are connected with the non-inverting input end of an operational amplifier AR1, the inverting input end and the output end of the operational amplifier AR1 are connected with one end of an adjustable resistor RP2 through a resistor R4, the other end of the adjustable resistor 63RP 28 is grounded, the sliding end of the adjustable resistor RP2 is connected with the non-inverting input end of an operational amplifier AR2, and the inverting input end and the output end of the operational.
3. The TDA reactor pressure control apparatus of claim 2, wherein: the reference stabilizing circuit comprises a voltage stabilizing diode DZ1, the cathode of the voltage stabilizing diode DZ1 is connected with the output end of the operational amplifier AR1, the anode of the voltage stabilizing diode DZ1 is connected with one end of a resistor R5, a resistor R6 and a capacitor C5 and the non-inverting input end of the operational amplifier AR3, the other end of the resistor R5 is connected with a +5V power supply, the other ends of the resistor R6 and the capacitor C5 are grounded, and the inverting input end of the operational amplifier AR3 is connected with the output end of the operational amplifier AR3 and the controller through the resistor R7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922474303.8U CN211577750U (en) | 2019-12-31 | 2019-12-31 | TDA reation kettle pressure control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922474303.8U CN211577750U (en) | 2019-12-31 | 2019-12-31 | TDA reation kettle pressure control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211577750U true CN211577750U (en) | 2020-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922474303.8U Active CN211577750U (en) | 2019-12-31 | 2019-12-31 | TDA reation kettle pressure control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211577750U (en) |
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2019
- 2019-12-31 CN CN201922474303.8U patent/CN211577750U/en active Active
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