CN114471400B - Temperature control method and control system for reactor - Google Patents
Temperature control method and control system for reactor Download PDFInfo
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- CN114471400B CN114471400B CN202111659112.4A CN202111659112A CN114471400B CN 114471400 B CN114471400 B CN 114471400B CN 202111659112 A CN202111659112 A CN 202111659112A CN 114471400 B CN114471400 B CN 114471400B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000001105 regulatory effect Effects 0.000 claims description 55
- 238000004321 preservation Methods 0.000 claims description 19
- 238000002425 crystallisation Methods 0.000 claims description 12
- 230000008025 crystallization Effects 0.000 claims description 12
- 230000001276 controlling effect Effects 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 3
- 238000001816 cooling Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 4
- 239000003814 drug Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 229940079593 drug Drugs 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0013—Controlling the temperature of the process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00054—Controlling or regulating the heat exchange system
- B01J2219/00056—Controlling or regulating the heat exchange system involving measured parameters
- B01J2219/00058—Temperature measurement
- B01J2219/0006—Temperature measurement of the heat exchange medium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00054—Controlling or regulating the heat exchange system
- B01J2219/00056—Controlling or regulating the heat exchange system involving measured parameters
- B01J2219/00058—Temperature measurement
- B01J2219/00063—Temperature measurement of the reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
- B01J2219/00094—Jackets
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Control Of Temperature (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The application relates to the field of reactors, in particular to a temperature control method and a temperature control system of a reactor. The application has the effects of conveniently controlling the cooling rate of the reactor and improving the temperature control precision.
Description
Technical Field
The application relates to the field of reactors, in particular to a temperature control method and a temperature control system for a reactor.
Background
In the production and preparation process of some medicines and the like, the medicines are gradually crystallized along with the change of the solution temperature, the crystal forms of the medicines are influenced by the too fast or the too slow temperature change in the crystallization process, and the medicine effect of the crystal forms is influenced by the quality. Therefore, temperature control within the reactor is particularly important.
At present, when a reactor is used for preparing medicines, a heating pipeline and a cooling pipeline are adopted to introduce a temperature regulating medium into a jacket of the reactor. The temperature control of the chemical reaction is performed by heat transfer between the temperature adjusting medium and the reactor.
In carrying out the present application, the inventors have found that at least the following problems exist in this technology: in the crystallization reaction which needs uniform cooling (such as cooling the solution at 80 ℃ to 20 ℃ and reducing the temperature by 1 ℃ per minute), medicines in the solution are continuously crystallized along with the continuous reduction of the temperature of the reactor, the specific heat capacity of the solution is always changed, the heat change in the crystallization process is difficult to calculate, and the cooling rate of the reactor is difficult to control.
Disclosure of Invention
In order to control the cooling rate of the reactor conveniently, the application provides a temperature control method and a temperature control system of the reactor.
The application provides a temperature control method of a reactor, which adopts the following technical scheme:
a method for controlling the temperature of a reactor, comprising the steps of:
monitoring the temperature of the solution in the reactor, and recording the time T0 required for the solution to reduce the fixed temperature T0;
monitoring the temperature of a temperature regulating medium entering a jacket of the reactor, and recording data into the temperature T1;
monitoring the temperature of the temperature regulating medium discharged from the reactor jacket and recording the data discharge temperature T2;
calculating a difference value T3 between the inlet temperature T1 and the outlet temperature T2, and calculating heat Q1 absorbed by the temperature regulating medium from the reactor according to the specific heat capacity of the temperature regulating medium and the specific heat capacity and the volume of the temperature regulating medium, wherein Q1 is the heat required to be emitted when the temperature of the solution is reduced by T0;
repeating the above operation, calculating the temperature change and the change of the heat emission during the crystallization of the solution, and controlling the temperature of the subsequent crystallization of the solution according to the calculation result.
By adopting the technical scheme, the heat dissipated in the crystallization process of the solution in the reactor is indirectly calculated by calculating the temperature difference between the temperature adjusting medium and the reactor before and after heat exchange and by calculating the heat lost by the temperature adjusting medium. According to the change of the heat emitted by the solution, the temperature of the temperature regulating medium is regulated, so that the temperature of the solution in the reactor is conveniently controlled, and the cooling rate of the solution in the reactor is conveniently controlled.
Optionally, in the crystallization process of the solution, a computer is used to control the temperature T1 and the flow of the temperature regulating medium entering the jacket of the reactor according to the change of T0 and the change of Q1 when the solution is crystallized.
By adopting the technical scheme, the flow and the temperature of the temperature regulating medium are automatically controlled by the computer, the control precision of the temperature and the flow of the temperature regulating medium is improved, and the control precision of the cooling rate of the solution in the reactor is improved.
Optionally, calculating a difference value T5 between the temperature T4 of the cold source and the entering temperature T1, calculating heat Q2 absorbed by the temperature-adjusting medium conveyed from the cold source to the jacket of the reactor according to the difference value T5, and reversely pushing by using the heat Q2 to adjust the temperature T4 of the cold source.
Through adopting above-mentioned technical scheme, through the adjustment to cold source temperature, the temperature of conveniently getting into the temperature regulating medium in the reactor is controlled in advance to calculate the heat of absorption or the giving off of temperature regulating medium in the transportation process in advance, further reduce the error to reactor temperature control, promote the control accuracy to reactor cooling rate.
Optionally, a PID controller is provided to receive temperature data in the reactor, temperature data entering the reactor jacket and temperature data of the temperature adjusting medium discharged from the reactor jacket, and the temperature T4 of the cold source is adjusted according to the change of the data.
By adopting the technical scheme, the PID controller is utilized to control the temperature of the cold source in real time, so that the temperature of the cold source can be conveniently and timely adjusted according to the change of the surrounding environment, and the control of the cooling rate of the solution in the reactor is improved.
Optionally, a pipeline of the heat source is connected in parallel on a pipeline of the cold source communicated with the reactor jacket, and the heat source is controlled to be connected and disconnected through a valve.
By adopting the technical scheme, the heating source is arranged to conveniently heat the reactor, so that the reactor is convenient to be used for different chemical reactions.
Optionally, a heat preservation pipe is connected in parallel on a pipeline for communicating the cold source with the reactor jacket, and the connection and disconnection of the heat preservation pipe are controlled through a valve.
By adopting the technical scheme, when the reactor needs to be insulated, the temperature adjusting medium passes through the insulating pipe, so that the influence of the dead zone of the valve on the temperature of the temperature adjusting medium is reduced, and the cooling precision of the reactor is improved.
On the other hand, the application also provides a temperature control system of the reactor, which adopts the following technical scheme:
the temperature control system of the reactor comprises a control host, the reactor, a conveying pipe group and a temperature adjusting component, wherein the control host is electrically connected with the temperature adjusting component, a jacket is arranged on the outer wall of the reactor, an input main pipe is communicated with the jacket, an output main pipe is communicated with the jacket, and the conveying pipe group is used for communicating the temperature adjusting component with the input main pipe and the output main pipe.
By adopting the technical scheme, the control host receives the temperature data of the temperature regulating medium in the input main pipe and the temperature data of the temperature regulating medium in the output main pipe, calculates the heat emitted by the solution according to the temperature data, automatically controls the temperature regulating assembly and improves the control precision of the temperature of the solution.
Optionally, the conveying pipe group comprises a first conveying pipe, a second conveying pipe and a heat preservation pipe, the first conveying pipe is communicated with the input main pipe and the output main pipe, the second conveying pipe is connected in parallel with the first conveying pipe, the heat preservation pipe is connected in parallel with the first conveying pipe, and the temperature adjusting component is arranged on the first conveying pipe and the second conveying pipe;
the first conveying pipe is provided with a first control valve, the second conveying pipe is provided with a second control valve, and the heat preservation pipe is provided with a third control valve.
Through adopting above-mentioned technical scheme, when keeping warm to the reactor, with first control valve and second control valve closure, open the third control valve, alleviate the problem of valve dead zone through the insulating tube, promote the precision to reactor temperature control.
Optionally, the temperature adjusting assembly includes a first temperature adjuster and a second temperature adjuster, the first temperature adjuster is disposed on the first conveying pipe, and the second temperature adjuster is disposed on the second conveying pipe.
Through adopting above-mentioned technical scheme, first attemperator is used for the cooling, and the second attemperator is used for heating, makes things convenient for the reactor to carry out different types of reactions, promotes the application scope of reactor.
Optionally, the system further comprises a PID controller, wherein the PID controller is electrically connected with the control host, a first temperature sensor is arranged on the output main pipe and is electrically connected with the control host and the PID controller, a second temperature sensor is arranged on the input main pipe and is electrically connected with the control host and the PID controller.
By adopting the technical scheme, the PID controller calculates the heat absorbed or lost in the process of conveying the temperature-adjusting medium, and controls the output temperature of the first temperature regulator and the second temperature regulator according to the heat lost or absorbed.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the control host receives temperature data of the temperature regulating medium in the input main pipe and temperature data of the temperature regulating medium in the output main pipe, calculates and calculates heat emitted by the solution according to the temperature data, automatically controls the temperature regulating assembly by combining with the PID controller, adjusts the output temperature of the temperature regulating assembly, and improves the control precision of the temperature of the solution;
2. and the first conveying pipe is connected with the heat preservation pipe in parallel, and when the reactor is insulated, a temperature-adjusting medium flows through the heat preservation pipe, so that the influence of a valve dead zone on the temperature control of the reactor is effectively relieved.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present application.
Fig. 2 is a block diagram showing a control host connection relationship.
Reference numerals illustrate: 1. a reactor; 2. a temperature regulating assembly; 21. a first thermostat; 22. a second attemperator; 3. a delivery tube group; 31. a first delivery tube; 32. a second delivery tube; 33. a heat preservation pipe; 4. a first control valve; 5. a second control valve; 6. a third control valve; 8. an input manifold; 9. an output manifold; 10. a first temperature sensor; 11. a second temperature sensor; 12. a temperature measuring rod; 13. a PID controller; 14. a transfer pump; 15. a control host; 16. and a jacket.
Detailed Description
The embodiment of the application discloses a temperature control method of a reactor, which comprises the following steps:
the method comprises the steps that a preset first heat exchanger pair is communicated with a jacket of a reactor through a pipeline, a first control valve is arranged on the pipeline, the first heat exchanger cools a temperature regulating medium in the pipeline, the first heat exchanger is a cold source, the first heat exchanger is electrically connected with a preset PID controller, the first heat exchanger sends temperature data T4 to the PID controller, and the PID controller receives and records the temperature data T4 sent by the first heat exchanger.
The temperature of the solution in the reactor is monitored in real time by the temperature measuring rod in the reactor, meanwhile, the measured temperature data T0 is sent to a preset control host by the temperature measuring rod, and the control host records time T0 required by reducing the temperature of the solution by 1 ℃.
The second temperature sensor monitors the temperature of the temperature regulating medium entering the jacket of the reactor, and is electrically connected with the control host and the PID controller, and the control host and the PID controller record data and enter the temperature T1.
The first temperature sensor monitors the temperature of the temperature regulating medium discharged from the jacket of the reactor, and is electrically connected with a control host and a PID controller, and the control host and the PID controller record data discharge temperature T2.
Calculating a difference value T3 between the inlet temperature T1 and the outlet temperature T2, and then calculating the heat quantity Q1 absorbed by the temperature-regulating medium of which the temperature is reduced by 1 ℃ according to the specific heat capacity of the temperature-regulating medium and the time T0 measured before, wherein Q1 is the heat quantity released by reducing the temperature by 1 ℃ of the solution.
As the medicine in the solution is crystallized, the concentration of the solution is always changed along with the continuous separation of the medicine from the solution, and Q1 is changed every time the solution is lowered by 1 ℃, namely, the time t0 required by the solution to be lowered by 1 ℃ every time is changed under the condition that the flow of the temperature regulating medium is unchanged. In order to ensure that the solution can be cooled at a uniform speed, the flow rate of the temperature regulating medium needs to be regulated according to the change condition of heat during the cooling of the solution. The control host machine makes a graph model from the change of the temperature T0 of the solution in the reactor and the change of the flow rate of the temperature regulating medium, and sends the graph model to the PID controller. The PID controller reads the graph model and adjusts the output temperature of the first heat exchanger and the flow rate of the temperature regulating medium according to the graph model. And the temperature and the flow rate of the temperature regulating medium are automatically controlled, so that the accuracy of the temperature control of the reactor is improved.
Due to the fact that the temperature of the surrounding environment inevitably changes when crystallization is carried out, at the moment, the heat exchanged with external heat when the temperature regulating medium is conveyed also changes, the PID controller calculates heat Q2 lost or obtained by heat exchange with external heat in the conveying process of the temperature regulating medium according to temperature data T4 sent by the first heat exchanger and entering temperature T1 sent by the second temperature sensor and a difference value T5 between the temperature data T4 and the temperature data T1, the output temperature of the first heat exchanger is adjusted, and the temperature control precision of the reactor is improved.
And a second heat exchanger is connected in parallel with a pipeline connected with the reactor jacket through the pipeline, a second control valve is arranged on the pipeline, and the second heat exchanger is used for heating a temperature-regulating medium. The second heat exchanger is arranged, so that the reactor is conveniently heated, and the reactor is conveniently adapted to different production requirements.
And a third control valve is arranged on the heat preservation pipe which is connected in parallel on the pipeline connected with the jacket of the reactor. After the temperature in the reactor reaches the threshold value, the reactor needs to be insulated, at the moment, the first control valve and the second control valve are closed, the third control valve is opened, and in the process of conveying the temperature regulating medium without calculation, the temperature is changed due to the influence of the external temperature, and at the moment, the temperature of the temperature regulating medium is the same as the temperature of the solution in the reactor, and heat exchange is avoided.
Under normal conditions, after long-term frequent use, the valve has the problem of dead zone, and at the moment, the temperature regulating medium passes through the first temperature regulator or the second temperature regulator, and the valve in the first temperature regulator or the second temperature regulator has trace leakage due to the dead zone and trace heat exchange with the temperature regulating medium, so that the temperature of the temperature regulating medium changes, the reaction temperature changes in the heat preservation process, and the reaction result is influenced.
Through setting up insulating tube, first control valve, second control valve and third control valve, when keeping warm the reactor, even the dead zone appears in first control valve, second control valve and the valve in first regulator and the second regulator, because the pressure that passes through in the insulating tube is less, a large amount of temperature regulating medium circulates in the insulating tube, and trace temperature regulating medium gets into first heat exchanger and second heat exchanger, has absorbed or lost very little part heat. After a trace amount of temperature-adjusting medium is mixed with the temperature-adjusting medium in the heat-preserving pipe, most of the temperature-adjusting medium is not subjected to heat transfer in the heat-preserving pipe, so that the temperature of the whole temperature-adjusting medium is difficult to influence, and the control accuracy of the temperature of the reactor is further improved.
Based on the above-mentioned reactor temperature control method, the embodiment of the application also discloses a temperature control system of the reactor, and the application is further described in detail below with reference to fig. 1-2.
Referring to fig. 1 and 2, the temperature control system of the reactor comprises a reactor 1, a conveying pipe group 3, a temperature regulating assembly 2, a control host 15 and a PID controller 13, wherein a jacket 16 is fixed on the outer wall of the reactor 1, a temperature measuring rod 12 is arranged in the reactor 1, an input main pipe 8 is communicated with the jacket 16, an output main pipe 9 is communicated with the jacket 16, the output main pipe 9 is arranged above the input main pipe 8, a conveying pump 14 is communicated with the input main pipe 8, and the conveying pipe group 3 communicates the temperature regulating assembly 2 with the input main pipe 8 and the output main pipe 9. The output manifold 9 is provided with a first temperature sensor 10, and the input manifold 8 is provided with a second temperature sensor 11. The first temperature sensor 10 is used to measure the discharge temperature T2, and the second temperature sensor 11 is used to measure the inlet temperature T1.
Referring to fig. 1 and 2, the temperature adjusting assembly 2 includes a first temperature adjuster 21 and a second temperature adjuster 22, the first temperature adjuster 21 being provided on the conveying pipe group 3, the second temperature adjuster 22 being provided on the conveying pipe group 3. The delivery pipe group 3 includes a first delivery pipe 31, a second delivery pipe 32 and a heat preservation pipe 33, the first delivery pipe 31 communicates the first temperature adjusting component 2 with the delivery header and the output header 9, the second delivery pipe 32 connects the second temperature adjuster 22 in parallel with the first delivery pipe 31, and the heat preservation pipe 33 is connected in parallel with the first delivery pipe 31. The first conveying pipe 31 is communicated with a first control valve 4, the second conveying pipe 32 is provided with a second control valve 5, and the heat preservation pipe 33 is communicated with a third control valve 6. Flow sensors are arranged on the first conveying pipe 31, the second conveying pipe 32 and the heat preservation pipe 33.
Referring to fig. 1 and 2, the control host 15 is electrically connected to the PID controller 13, and the temperature measuring rod 12, the three flow sensors, the first temperature sensor 10, and the second temperature sensor 11 are electrically connected to the control host 15. The temperature measuring bar 12 continuously transmits the temperature T0 of the solution in the reactor 1 to the control host 15, the control host 15 records the temperature data T0, the control host 15 records the temperature data received each time by a timer, and when the temperature T0 is reduced by 1 ℃, the control host 15 calculates a time interval T0 according to the time data recorded by the timer. The first temperature sensor 10 sends the measured discharge temperature T2 to the control host 15, the second temperature sensor 11 sends the measured inlet temperature T1 to the control host 15, the flow sensor sends the measured flow V of the temperature adjusting medium to the control host 15, and the control host 15 calculates the heat Q1 emitted by the solution at 1 ℃ according to the preset specific heat capacity of the temperature adjusting medium, the discharge temperature T2, the inlet temperature T1 and the flow V.
Referring to fig. 1 and 2, the control host 15 recalculates the flow VS of the temperature adjusting medium in the conveying pipe group 3 according to the heat Q1 emitted from the solution at each reduced temperature of 1 ℃ and the time interval T0 by controlling T0 as a design requirement value and keeping T1 always smaller than T0 and the difference value as a fixed value m, and makes a graph model of the change relation between T0 and VS and sends model data to the PID controller 13.
Referring to fig. 1 and 2, the pid controller 13 is electrically connected to the temperature measuring bar 12, the first temperature regulator 21, the second temperature regulator 22, the first temperature sensor 10, the second temperature sensor 11, the first control valve 4, the second control valve 5, the third control valve 6, and the three flow sensors. The PID controller 13 automatically controls the first thermostat 21, the second thermostat 22, the first control valve 4, the second control valve 5, and the third control valve 6 based on the map transmitted from the control host 15.
Since the first thermostat 21 and the second thermostat 22 are used only in the difference in effect, only the first thermostat 21 will be exemplified below.
Referring to fig. 1 and 2, simultaneously, the PID controller 13 receives the temperature signal T4 sent by the first thermostat 21, calculates the difference T5 between T4 and T1, and calculates the heat Q2 absorbed during the temperature-adjusting medium conveying process. And according to Q2 and T1, enabling T1 to meet the condition that T1 is always smaller than T0, and determining the value of T4 again under the condition that the difference value is a fixed value m. The PID controller 13 transmits the re-determined temperature data to the first thermostat 21, and the first thermostat 21 adjusts the output temperature to T4 after the re-determination after receiving the data transmitted by the PID controller 13.
Referring to fig. 1, when the solution in the reactor 1 is kept warm, the accuracy of temperature control of the reactor 1 can be effectively improved by closing the first control valve 4 and the second control valve 5 and opening the third control valve 6.
The implementation principle of the embodiment of the application is as follows: the heat absorbed by the temperature-measuring medium is calculated through temperature measurement before and after heat exchange between the temperature-adjusting medium and the reactor 1, so that the heat emitted in the solution crystallization process in the reactor 1 is indirectly obtained, and the temperature in the solution crystallization process is controlled more accurately. By arranging the control host 15 and the PID controller 13, the temperature of the reactor 1 is automatically controlled, and the output temperature of the first temperature regulator 21 can be regulated according to the conveying condition of the temperature regulating medium, so that the accuracy of the temperature control of the reactor 1 is further improved.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (7)
1. A method for controlling the temperature of a reactor, characterized by: the method comprises the following steps:
monitoring the temperature of the solution in the reactor, and recording the time T0 required for the solution to reduce the fixed temperature T0;
monitoring the temperature of a temperature regulating medium entering a jacket of the reactor, and recording data into the temperature T1;
monitoring the temperature of the temperature regulating medium discharged from the reactor jacket and recording the data discharge temperature T2;
calculating a difference value T3 between the inlet temperature T1 and the outlet temperature T2, and calculating heat Q1 absorbed by the temperature regulating medium from the reactor according to the specific heat capacity of the temperature regulating medium and the specific heat capacity and the volume of the temperature regulating medium, wherein Q1 is the heat required to be emitted when the temperature of the solution is reduced by T0;
repeating the above operation, calculating the temperature change and the change of the heat emission during solution crystallization, and controlling the temperature of the subsequent solution crystallization according to the calculation result;
in the process of crystallizing the solution, a computer is used for controlling the temperature T1 and the flow of a temperature regulating medium entering a jacket of the reactor according to the change of T0 and the change of Q1 when the solution is crystallized;
calculating a difference value T5 between the temperature T4 of the cold source and the entering temperature T1, calculating heat Q2 absorbed by the temperature regulating medium conveyed from the cold source to the reactor jacket according to the T5, and reversely pushing by utilizing the Q2 to adjust the temperature T4 of the cold source;
the PID controller is arranged to receive temperature data in the reactor, temperature data entering the reactor jacket and temperature data of a temperature regulating medium discharged from the reactor jacket, and the temperature T4 of the cold source is regulated according to the change of the data.
2. A method for controlling the temperature of a reactor according to claim 1, wherein: and a pipeline of a heat source is connected in parallel on a pipeline of the cold source communicated with the reactor jacket, and the heat source is controlled to be communicated and disconnected through a valve.
3. A method for controlling the temperature of a reactor according to claim 2, wherein: and a heat preservation pipe is connected in parallel on a pipeline for communicating the cold source with the reactor jacket, and the connection and disconnection of the heat preservation pipe are controlled through a valve.
4. A temperature control system for a reactor, characterized by: a temperature control method of a reactor (1) according to any one of claims 1 to 3, comprising a control host (15), the reactor (1), a conveying pipe group (3) and a temperature regulating assembly (2), wherein the control host (15) is electrically connected with the temperature regulating assembly (2), a jacket (16) is arranged on the outer wall of the reactor (1), an input main pipe (8) is communicated with the jacket (16), an output main pipe (9) is communicated with the jacket (16), and the conveying pipe group (3) is used for communicating the temperature regulating assembly (2) with the input main pipe (8) and the output main pipe (9).
5. A temperature control system for a reactor as set forth in claim 4, wherein: the conveying pipe group (3) comprises a first conveying pipe (31), a second conveying pipe (32) and a heat preservation pipe (33), the first conveying pipe (31) is communicated with the input main pipe (8) and the output main pipe (9), the second conveying pipe (32) is connected in parallel to the first conveying pipe (31), the heat preservation pipe (33) is connected in parallel to the first conveying pipe (31), and the temperature adjusting assembly (2) is arranged on the first conveying pipe (31) and the second conveying pipe (32);
the first conveying pipe (31) is provided with a first control valve (4), the second conveying pipe (32) is provided with a second control valve (5), and the heat preservation pipe (33) is provided with a third control valve (6).
6. A temperature control system for a reactor as set forth in claim 5, wherein: the temperature adjusting assembly (2) comprises a first temperature adjuster (21) and a second temperature adjuster (22), wherein the first temperature adjuster (21) is arranged on a first conveying pipe (31), and the second temperature adjuster (22) is arranged on a second conveying pipe (32).
7. A temperature control system for a reactor as set forth in claim 4, wherein: still include PID controller (13), PID controller (13) are connected with control host computer (15) electricity, be equipped with first temperature sensor (10) on output house steward (9), first temperature sensor (10) are connected with control host computer (15) and PID controller (13) electricity, be equipped with second temperature sensor (11) on input house steward (8), second temperature sensor (11) are connected with control host computer (15) and PID controller (13) electricity.
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| CN202111659112.4A CN114471400B (en) | 2021-12-30 | 2021-12-30 | Temperature control method and control system for reactor |
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| CN202111659112.4A CN114471400B (en) | 2021-12-30 | 2021-12-30 | Temperature control method and control system for reactor |
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| CN114471400B true CN114471400B (en) | 2023-11-28 |
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| CN111408326A (en) * | 2019-01-04 | 2020-07-14 | 中昊晨光化工研究院有限公司 | Reaction kettle temperature control method and system |
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