CN114063673A - Reaction kettle temperature control method and system and storage medium - Google Patents
Reaction kettle temperature control method and system and storage medium Download PDFInfo
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- CN114063673A CN114063673A CN202111317426.6A CN202111317426A CN114063673A CN 114063673 A CN114063673 A CN 114063673A CN 202111317426 A CN202111317426 A CN 202111317426A CN 114063673 A CN114063673 A CN 114063673A
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- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
Abstract
The application discloses a reaction kettle temperature control method, a reaction kettle temperature control system and a storage medium, which are used for realizing feedforward control of a reaction kettle with jacket heat exchange and overcoming the hysteresis of the reaction kettle with jacket heat exchange. The method comprises the following steps: in the production process of the reaction kettle, determining the adjustment amount of the jacket material flow of the reaction kettle and the adjustment time corresponding to the adjustment amount of the jacket material of the reaction kettle when the feedforward control is carried out on the temperature of the reaction kettle; and adjusting the material flow in the reaction kettle jacket according to the adjustment amount and the adjustment time of the material flow of the reaction kettle jacket so as to realize the control of the temperature of the reaction kettle at each moment. By adopting the scheme provided by the application, the feedforward control of the reaction kettle with the heat exchange of the jacket can be realized, and the hysteresis of the temperature control of the reaction kettle with the heat exchange of the jacket is overcome.
Description
Technical Field
The application relates to the technical field of temperature control, in particular to a reaction kettle temperature control method, a reaction kettle temperature control system and a storage medium.
Background
The reaction kettle is widely applied to the fields of petroleum, chemical industry, rubber, medicine, food and the like, and is a pressure container for completing the technological processes of vulcanization, nitration, hydrogenation, alkylation, polymerization, condensation and the like. In the production process by utilizing the reaction kettle, the yield of the produced product is influenced by the internal temperature of the reaction kettle, and the yield can reach a more ideal level by keeping the internal production environment of the reaction kettle at a proper temperature.
Suitable temperatures corresponding to various types of products or production processes are well known to those skilled in the art, but it is not easy to control the temperature in the reaction kettle so that the temperature in the reaction kettle is maintained at the suitable temperature, in the prior art, the temperature in the reactor is controlled by proportional-integral-derivative control, for example, when the temperature exceeds the set interval, the adjustment amount of the jacket material is calculated by a proportional-integral-derivative algorithm, thereby changing the heat dissipation speed of the jacket material to the reaction kettle by increasing or decreasing the jacket material, so as to quickly return the temperature in the reaction kettle to the set interval, therefore, for the reaction kettle with jacket heat exchange, the temperature control of the reactor depends on the material (such as water or other medium) in the jacket to carry heat out or transfer heat to the reaction kettle, so the temperature control has obvious hysteresis. This hysteresis makes the temperature outside the set range for a longer time, which affects the yield of the product. If a method for feedforward control of a jacket heat exchange reaction kettle can be provided, the hysteresis of temperature control of the jacket heat exchange reaction kettle is overcome, and the time for which the temperature is out of a set interval can be reduced.
Therefore, it is an urgent technical problem to provide a method for controlling the temperature of a reaction kettle to realize the feedforward control of the reaction kettle with jacket heat exchange and overcome the hysteresis of the temperature control of the reaction kettle with jacket heat exchange.
Disclosure of Invention
The application provides a reaction kettle temperature control method, a reaction kettle temperature control system and a storage medium, which are used for realizing feedforward control of a reaction kettle with jacket heat exchange and overcoming the hysteresis of the reaction kettle with jacket heat exchange.
The application provides a reaction kettle temperature control method, which comprises the following steps:
in the production process of the reaction kettle, acquiring historical operating data, set parameters and temperature values of jacket materials of the reaction kettle in the production process of a batch of secondary production of the reaction kettle;
determining the adjustment quantity of the flow of the jacket material of the reaction kettle according to the historical operation data, the temperature value of the jacket material of the reaction kettle in the production process and the set parameters;
determining the adjusting time corresponding to the adjusting quantity of the jacket material of the reaction kettle when the temperature of the reaction kettle is subjected to feedforward control according to the temperature value of the jacket material of the reaction kettle and the adjusting quantity of the flow of the jacket material of the reaction kettle;
and adjusting the material flow in the reaction kettle jacket according to the adjustment amount and the adjustment time of the material flow of the reaction kettle jacket so as to realize the control of the temperature of the reaction kettle at each moment.
The beneficial effect of this application lies in: the adjustment quantity of the flow of the jacket material of the reaction kettle can be determined according to historical operating data, the temperature value of the jacket material of the reaction kettle in the production process and set parameters; and then determining the adjusting time corresponding to the adjusting quantity of the jacket material of the reaction kettle when the feedforward control is carried out on the reaction kettle, wherein the adjusting time corresponding to the adjusting quantity of the jacket material of the reaction kettle and the adjusting quantity of the flow of the jacket material of the reaction kettle adjust the flow of the material in the jacket of the reaction kettle during the feedforward control so as to realize the control of the temperature of the reaction kettle at each moment.
In one embodiment, determining the adjustment amount of the flow rate of the jacket material of the reaction kettle according to the historical operation data, the temperature value of the jacket material of the reaction kettle in the production process and the set parameters comprises:
acquiring the mass heat capacity of materials in the reaction kettle, the mass of the materials in the reaction kettle, the time interval of the last batch of data record and the mass heat capacity of the jacket materials of the reaction kettle;
and determining the adjustment quantity of the flow of the jacket material of the reaction kettle according to the temperature value of the jacket material of the reaction kettle, the deviation of the historical operating data and the set parameters, the mass heat capacity of the materials in the reaction kettle, the mass of the materials in the reaction kettle, the time interval recorded by the data of the previous batch and the mass heat capacity of the jacket material of the reaction kettle in the production process.
In one embodiment, the determining the adjustment amount of the flow rate of the jacket material of the reaction kettle according to the temperature value of the jacket material of the reaction kettle, the deviation of the historical operating data and the set parameter, the mass heat capacity of the material in the reaction kettle, the mass of the material in the reaction kettle, the time interval recorded by the data of the previous batch and the mass heat capacity of the jacket material of the reaction kettle in the current production process comprises:
substituting the temperature value of the jacket material of the reaction kettle, the historical operating data, the set parameters, the mass heat capacity of the material in the reaction kettle, the mass of the material in the reaction kettle, the time interval recorded by the data of the previous batch and the mass heat capacity of the jacket material of the reaction kettle into the following formula to determine the adjustment amount of the flow rate of the jacket material of the reaction kettle:
wherein, Δ Fjacket[i]The amount of the material flow of the reaction kettle jacket is adjusted;
the mass heat capacity of the materials in the reaction kettle; mrectorThe mass of the materials in the reaction kettle; pv [ i ]]The ith temperature data recorded in the historical operating data set;sp[i]setting the ith temperature data in the parameter array; t is tintervalThe time interval recorded for the previous batch of data;
the mass heat capacity of the jacket material of the reaction kettle; t isjacketThe temperature of the jacket material of the reaction kettle; wherein, the [ alpha ], [ beta ] -a]For rounding calculations, n is a positive integer.
In one embodiment, the determining, according to the temperature value of the reactor jacket material and the adjustment amount of the flow rate of the reactor jacket material, an adjustment timing corresponding to the adjustment amount of the reactor jacket material when performing the feedforward control on the reactor temperature includes:
acquiring historical operation data, the temperature difference between a reaction kettle and a jacket material during single batch operation, the mass flow of the jacket material of the reaction kettle, the fluctuation period of the internal temperature of the reaction kettle, and the peak time difference between the fluctuation of the jacket water flow and the fluctuation of the internal temperature of the reaction kettle;
determining an advance corresponding to the adjustment quantity of the jacket material of the reaction kettle according to the temperature value of the jacket material of the reaction kettle, the adjustment quantity of the flow of the jacket material of the reaction kettle, historical operation data, the temperature difference between the jacket material and the reaction kettle in single batch operation, the mass flow of the jacket material of the reaction kettle, the fluctuation cycle of the internal temperature of the reaction kettle, and the peak time difference between the fluctuation of the flow of the jacket water and the fluctuation of the internal temperature of the reaction kettle;
and determining the adjusting time corresponding to the adjusting quantity of the jacket material of the reaction kettle when the feedforward control is carried out on the temperature of the reaction kettle according to the advance corresponding to the adjusting quantity of the jacket material of the reaction kettle.
The method has the advantages that the advance corresponding to the adjustment quantity of the jacket material of the reaction kettle can be determined, so that the adjustment time corresponding to the adjustment quantity of the jacket material of the reaction kettle when the feed-forward control is carried out on the temperature of the reaction kettle is determined according to the advance corresponding to the adjustment quantity of the jacket material of the reaction kettle, and the feed-forward control on the temperature of the reaction kettle is realized according to the advance corresponding to the adjustment quantity of the jacket material of the reaction kettle.
In one embodiment, the determining the advanced amount corresponding to the adjustment amount of the jacket material of the reaction kettle according to the temperature value of the jacket material of the reaction kettle, the adjustment amount of the flow rate of the jacket material of the reaction kettle, historical operation data, the temperature difference between the reaction kettle and the jacket material during single batch operation, the mass flow rate of the jacket material of the reaction kettle, the fluctuation period of the internal temperature of the reaction kettle, and the peak time difference between the fluctuation of the flow rate of the jacket water and the fluctuation of the internal temperature of the reaction kettle comprises:
wherein n isadjust[i]The lead corresponding to the adjustment amount of the jacket material of the reaction kettle; pv [ i ]](ii) the ith temperature data recorded for the historical operating dataset; t isjacketThe temperature of the jacket material of the reaction kettle; delta t is the temperature difference between the reaction kettle and the jacket material when in single-batch operation; fjacketMass flow of the jacket material of the reaction kettle; Δ Fjacket[i]The amount of the material flow of the reaction kettle jacket is adjusted; t isTIs the period of fluctuation of the internal temperature of the reaction kettle, TDThe peak time difference between the flow fluctuation of the jacket material and the temperature fluctuation in the reaction kettle is obtained; t is tintervalThe time interval of the last batch of data records.
In one embodiment, determining an adjustment timing corresponding to an adjustment amount of a jacket material of a reaction kettle when feedforward control is performed on a temperature of the reaction kettle according to an advance amount corresponding to the adjustment amount of the jacket material of the reaction kettle comprises:
solving for i-nadjust[i]A value;
if i-nadjust[i]If the value is less than or equal to 1, the adjusting time corresponding to the ith material adjusting amount is the preset time corresponding to the first adjustment of the jacket material of the reaction kettle;
if i-nadjust[i]If the value is more than 1, the adjustment time corresponding to the ith adjustment amount is the preset i-n time for carrying out the ith-n time on the jacket material of the reaction kettleadjust[i]And adjusting the corresponding time.
In one embodiment, the adjusting the material flow in the reactor jacket according to the adjustment amount and the adjustment timing of the material flow in the reactor jacket comprises:
determining a feed-forward value of the adjustment quantity of the jacket material of the reaction kettle according to the adjustment quantity of the jacket material of the reaction kettle, the adjustment time and the advance quantity;
and adjusting the material flow in the reaction kettle jacket according to the feed-forward value.
In one embodiment, the determining a feed-forward value of the reactor jacket material adjustment amount according to the reactor jacket material adjustment amount, the adjustment timing and the advance comprises:
when one adjusting time of the jacket materials of the reaction kettle only corresponds to one adjusting quantity of the jacket materials of the reaction kettle, determining the adjusting quantity of the jacket materials of the reaction kettle corresponding to the adjusting time as a feedforward value of the adjusting quantity of the jacket materials of the reaction kettle;
when one adjusting time of the jacket materials of the reaction kettle corresponds to a plurality of jacket material adjusting quantities of the reaction kettle, determining the sum of the plurality of jacket material adjusting quantities of the reaction kettle corresponding to the adjusting time as a feedforward value of the jacket material adjusting quantities of the reaction kettle.
The present application further provides a reaction kettle temperature control system, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to implement the method of controlling the temperature of a reaction vessel as described in any one of the above embodiments.
The present application also provides a computer-readable storage medium, wherein when instructions in the storage medium are executed by a processor corresponding to the reaction kettle temperature control system, the reaction kettle temperature control system can implement the reaction kettle temperature control method described in any one of the embodiments.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present application is further described in detail by the accompanying drawings and examples.
Drawings
The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application and not to limit the application. In the drawings:
FIG. 1 is a flow chart of a method for controlling the temperature of a reaction vessel according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of a method for controlling temperature in a reactor according to another embodiment of the present disclosure;
FIG. 3 is a flow chart of a method for controlling the temperature of a reaction vessel according to yet another embodiment of the present disclosure;
FIG. 4 is a schematic flow chart of information during operation of a reaction vessel temperature control system according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a hardware structure of a temperature control system of a reactor according to the present application.
Detailed Description
The preferred embodiments of the present application will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein only to illustrate and explain the present application and not to limit the present application.
FIG. 1 is a flow chart of a method for controlling the temperature of a reaction vessel according to an embodiment of the present invention, as shown in FIG. 1, the method can be implemented as the following steps S11-S14:
in step S11, in the production process of the reaction kettle, obtaining historical operating data, set parameters and temperature values of jacket materials of the reaction kettle in the production process of a previous batch of secondary production of the reaction kettle;
in step S12, determining an adjustment amount of the flow rate of the jacket material of the reaction kettle according to the historical operation data, the temperature value of the jacket material of the reaction kettle in the current production process and the set parameters;
in step S13, determining an adjustment time corresponding to the adjustment amount of the jacket material of the reaction kettle when performing feedforward control on the temperature of the reaction kettle according to the temperature value of the jacket material of the reaction kettle and the adjustment amount of the flow rate of the jacket material of the reaction kettle;
in step S14, the material flow in the reactor jacket is adjusted according to the adjustment amount and the adjustment timing of the material flow in the reactor jacket, so as to control the temperature of the reactor at each time.
In the production process of the reaction kettle, historical operating data, set parameters and temperature values of jacket materials of the reaction kettle in the production process of the previous batch of secondary production of the reaction kettle are obtained; specifically, for example, the last batch data recording time interval is tintervalWith a single secondary production period of tbatchAnd then the recording number of the historical operation data collection module is as follows:
wherein]Is calculated for rounding. Historical operating data is collected by the historical operating data collecting module, and the historical operating data recorded by the historical operating data collecting module is recorded in an array pv [ n ]]The setting parameters are recorded in an array sp [ n ]](ii) a The historical operation data at least comprises the actual temperature value in the previous secondary production process, and the setting parameters at least comprise the setting value of the temperature. Secondly, still need obtain this production in-process reation kettle jacket material's temperature value, in actual production in-process, need continue to inject the material into for reation kettle jacket to take out the unnecessary heat in the reation kettle, consequently, this production in-process reation kettle jacket material's temperature value can refer to the material temperature value before injecting into reation kettle jacket.
Determining the adjustment quantity of the flow of the jacket material of the reaction kettle according to the historical operation data, the temperature value of the jacket material of the reaction kettle in the production process and the set parameters; specifically, the mass heat capacity of the materials in the reaction kettle, the mass of the materials in the reaction kettle, the time interval recorded by the data of the previous batch and the mass heat capacity of the jacket materials of the reaction kettle are obtained; and determining the adjustment quantity of the material flow of the reaction kettle jacket according to the temperature value of the reaction kettle jacket material in the production process, the deviation of the historical operation data and the set parameters, the mass heat capacity of the material in the reaction kettle, the mass of the material in the reaction kettle, the time interval recorded by the previous batch of data and the mass heat capacity of the reaction kettle jacket material.
Wherein, the above-mentioned adjustment volume according to the temperature value of reation kettle jacket material in this production process, the deviation of historical operating data and set parameter, the quality heat capacity of reation kettle internal material, the quality of reation kettle internal material, the time interval of last batch time data record and the quality heat capacity of reation kettle jacket material determine reation kettle jacket material flow includes: substituting the temperature value of the jacket material of the reaction kettle, the historical operating data, the set parameters, the mass heat capacity of the material in the reaction kettle, the mass of the material in the reaction kettle, the time interval recorded by the data of the previous batch and the mass heat capacity of the jacket material of the reaction kettle in the production process into the following formula to determine the adjustment quantity of the flow of the jacket material of the reaction kettle:
wherein, Δ Fjacket[i]The amount of the material flow of the reaction kettle jacket is adjusted;
the mass heat capacity of the materials in the reaction kettle; mrectorThe mass of the materials in the reaction kettle; pv [ i ]]The ith temperature data recorded in the historical operating data set; sp [ i ]]Setting the ith temperature data in the parameter array; t is tintervalThe time interval recorded for the previous batch of data;
the mass heat capacity of the jacket material of the reaction kettle; t isjacketThe temperature of the jacket material of the reaction kettle; wherein, the [ alpha ], [ beta ] -a]To getAnd n is a positive integer.
Determining the adjusting time corresponding to the adjusting quantity of the jacket material of the reaction kettle when the temperature of the reaction kettle is subjected to feedforward control according to the temperature value of the jacket material of the reaction kettle and the adjusting quantity of the flow of the jacket material of the reaction kettle; specifically, historical operation data, the temperature difference between a reaction kettle and a jacket material during single batch operation, the mass flow of the jacket material of the reaction kettle, the internal temperature fluctuation period of the reaction kettle, and the peak time difference between the water flow fluctuation of the jacket and the internal temperature fluctuation of the reaction kettle are obtained; determining an advanced amount corresponding to the adjustment amount of the jacket material of the reaction kettle according to the temperature value of the jacket material of the reaction kettle, the adjustment amount of the flow of the jacket material of the reaction kettle, historical operating data, the temperature difference between the jacket material and the reaction kettle in single batch operation, the mass flow of the jacket material of the reaction kettle, the internal temperature fluctuation period of the reaction kettle, and the peak time difference between the jacket water flow fluctuation and the internal temperature fluctuation of the reaction kettle; and determining the adjusting time corresponding to the adjusting quantity of the jacket material of the reaction kettle when the feedforward control is carried out on the temperature of the reaction kettle according to the advance corresponding to the adjusting quantity of the jacket material of the reaction kettle.
Determining the lead corresponding to the adjustment quantity of the jacket material of the reaction kettle according to the temperature value of the jacket material of the reaction kettle, the adjustment quantity of the flow of the jacket material of the reaction kettle, historical operating data, the temperature difference between the jacket material and the reaction kettle in single batch operation, the mass flow of the jacket material of the reaction kettle, the fluctuation cycle of the internal temperature of the reaction kettle, the crest time difference between the fluctuation of the flow of the jacket water and the fluctuation of the internal temperature of the reaction kettle, and the method comprises the following steps:
wherein n isadjust[]The lead corresponding to the adjustment amount of the jacket material of the reaction kettle; pv [ i ]](ii) the ith temperature data recorded for the historical operating dataset; t isjacketThe temperature of the jacket material of the reaction kettle; delta t is the temperature difference between the reaction kettle and the jacket material when in single-batch operation; fjacketMass flow of jacket material for reaction kettle； ΔFjacket[i]The amount of the material flow of the reaction kettle jacket is adjusted; t isTIs the period of fluctuation of the internal temperature of the reaction kettle, TDThe peak time difference between the flow fluctuation of the jacket material and the temperature fluctuation in the reaction kettle is obtained; t is tintervalThe time interval of the last batch of data records.
And determining the adjusting time corresponding to the adjusting quantity of the jacket material of the reaction kettle when the feedforward control is carried out on the temperature of the reaction kettle according to the advance corresponding to the adjusting quantity of the jacket material of the reaction kettle, comprising the following steps:
solving for i-nadjust[i]A value;
if i-nadjust[i]If the value is less than or equal to 1, the adjusting time corresponding to the ith material adjusting amount is the preset time corresponding to the first adjustment of the jacket material of the reaction kettle;
if i-nadjust[i]If the value is more than 1, the adjustment time corresponding to the ith adjustment amount is the preset i-n time for carrying out the ith-n time on the jacket material of the reaction kettleadjust[i]And adjusting the corresponding time.
Adjusting the material flow in the reaction kettle jacket according to the adjustment amount and the adjustment time of the material flow of the reaction kettle jacket so as to realize the control of the temperature of the reaction kettle at each moment; specifically, a feed-forward value of the adjustment amount of the jacket material of the reaction kettle is determined according to the adjustment amount of the jacket material of the reaction kettle, the adjustment time and the advance; and adjusting the material flow in the reaction kettle jacket according to the feed-forward value.
Wherein, the determining of the feedforward value of the adjustment quantity of the jacket material of the reaction kettle according to the adjustment quantity of the jacket material of the reaction kettle, the adjustment time and the advance comprises the following steps: when one adjusting machine of the jacket materials of the reaction kettle only corresponds to one adjusting quantity of the jacket materials of the reaction kettle, determining the adjusting quantity of the jacket materials of the reaction kettle corresponding to the adjusting time as a feed-forward value of the adjusting quantity of the jacket materials of the reaction kettle; when one adjusting time of the jacket materials of the reaction kettle corresponds to a plurality of jacket material adjusting quantities of the reaction kettle, determining the sum of the plurality of jacket material adjusting quantities of the reaction kettle corresponding to the adjusting time as a feedforward value of the jacket material adjusting quantities of the reaction kettle.
The reactor temperature control method of the present application is exemplified below by way of example:
taking PVC polymerization process temperature control as an example, the polymerization monomer is vinyl chloride, a kettle type heat exchanger is adopted for polymerization, and a jacket is used for heat removal; the mass of the materials in the reaction kettle is 30000kg, the mass heat capacity is 3.5 kJ/kg/DEG C, the mass flow of the jacket materials of the reaction kettle is 2000kg/h, the mass heat capacity is 4.2 kJ/kg/DEG C, and the temperature of the jacket materials is 20 ℃;
the temperature difference between the reaction kettle and the jacket material in single-batch operation is 40 ℃, the fluctuation cycle of the internal temperature of the reaction kettle is 1.5h, the peak time difference between the flow fluctuation of the jacket material and the internal temperature fluctuation of the reaction kettle is 0.3h, and the single-batch secondary production cycle is 5.2 h.
Selecting the recording time interval of the previous batch of data as 1h, and then recording the number of the historical operation data collection modules as follows:
the actual temperature value recorded by the historical operation data collection module is recorded in an array pv [5 ]]＝[60.2,60.1,60,59.8,59.7]The recorded temperature set point is recorded in the array sp [5 ]]＝ [60,60,60,60,60]；
And (3) substituting the corresponding parameter values into the formula (1) to determine the adjustment amount of the jacket material flow of the reaction kettle, which is as follows:
secondly, substituting the corresponding parameter values into the formula (2) to determine the lead corresponding to the adjustment amount of the jacket material of the reaction kettle, which is as follows:
that is, if the temperature of the reactor is adjusted once per hour, i.e. one hour is an adjustment period, the temperature is adjusted for the first time when the reactor is just started to produce, and the temperature is adjusted for the second time after one hour, and so on. Then, after the advance is calculated, the advance corresponding to each jacket material adjustment amount needs to be pushed forward for two adjustment periods. That is, to allow the temperature to reach the desired value in one cycle, the jacket material flow rate needs to be adjusted two cycles in advance.
Solving for i-nadjust[i]The values are as follows:
1-nadjust[1]＝-1
2-nadjust[2]＝0
3-nadjust[3]＝1
4-nadjust[4]＝2
5-nadjust[1]＝3
it can be found by calculation that the jacket material adjustment amount originally corresponding to the first adjustment period becomes-1, and the jacket material adjustment amount originally corresponding to the second adjustment period becomes 0, that is, the jacket material adjustment amounts originally corresponding to the first adjustment period and the second adjustment period need to be adjusted before the start of production, which is obviously not appropriate, and therefore, based on the above description, if i-n is determinedadjust[i]If the value is less than or equal to 1, the adjusting time corresponding to the ith material adjusting amount is the preset time corresponding to the first adjustment of the jacket material of the reaction kettle; namely, the jacket material adjustment amounts originally corresponding to the first adjustment period, the second adjustment period and the third adjustment period correspond to the time corresponding to the first adjustment (namely, the first adjustment period) after the advance is calculated.
As can be seen from the above description, the rule of the feedforward calculation is: when one adjusting time of the jacket materials of the reaction kettle only corresponds to one adjusting quantity of the jacket materials of the reaction kettle, determining the adjusting quantity of the jacket materials of the reaction kettle corresponding to the adjusting time as a feedforward value of the adjusting quantity of the jacket materials of the reaction kettle; when an adjusting time of the jacket material of the reaction kettle corresponds to a plurality of jacket material adjusting quantities of the reaction kettle, determining the sum of the plurality of jacket material adjusting quantities of the reaction kettle corresponding to the adjusting time as a feedforward value of the jacket material adjusting quantities of the reaction kettle, and obtaining the following result according to a feedforward value calculation method:
FV[1]＝ΔFjacket[1]+ΔFjacket[2]+ΔFjacket[3]＝125+62.5+0＝187.5
FV[2]＝ΔFjacket[4]＝-125
FV[3]＝ΔFjacket[5]＝-187.5
FV[4]＝0
FV[5]＝0
therefore, the original output values of the temperature control PID controller in the batch production process at each moment are assumed to be: 10. 50, 30, -50, -25; after adjustment according to the feedforward value, the output value at the corresponding time is adjusted to 197.5, -75, -157.5, -50, -25.
Fig. 4 is a schematic view showing the flow of information during operation of the reactor temperature control system according to the present application, wherein the values of the measured temperature of the batch reactor, the set control value and the actual control value at different time intervals of the temperature of the previous batch, the feedforward calculated value of the jacket material corresponding to each time interval under the operation condition of the production cycle, the adjustment signal of the reactor temperature controller, and the measured temperature of the reactor are shown. According to the scheme and the figure 4, the method adopts a feedforward control method, the heat exchange of the jacket is adjusted in advance, and the hysteresis of the control process is overcome. Meanwhile, in order to obtain the optimal feedforward control feedforward value and make up for the influence of process change among different batches, the calculation of the feedforward adjustment value uses the operation data of the previous batch to make up for the defects of steady-state and dynamic control in the previous batch control. The flow of the jacket material is adjusted in each batch of production process based on historical operation data in the previous batch of production process, so that the overall trend of temperature control is continuously optimized, and the control effect is finally kept in the optimal state through continuous iterative optimization of different batches, thereby being beneficial to maintaining the control stability among different batches and further improving the batch stability of product control in the intermittent process.
It is understood that, when the temperature in the historical operating data and the set parameter of the previous batch is approximately the same, the control effect can be considered to have reached the optimal state, and then, in the production process of the batch, the control parameter of the previous batch can be directly used for control without calculation, that is, the application can also be implemented as follows:
and when the temperature difference between the actual temperature value in the historical operating data in the previous batch of production process and the temperature set value at the corresponding moment in the set parameters is smaller than a preset difference value, acquiring a feed-forward value adopted in the previous batch of secondary production process to adjust the material flow in the reaction kettle jacket.
The beneficial effect of this application lies in: the adjustment quantity of the flow of the jacket material of the reaction kettle can be determined according to historical operating data, the temperature value of the jacket material of the reaction kettle in the production process and set parameters; and then determining the adjusting time corresponding to the adjusting quantity of the jacket material of the reaction kettle when the feedforward control is carried out on the reaction kettle, wherein the adjusting time corresponding to the adjusting quantity of the jacket material of the reaction kettle and the adjusting quantity of the flow of the jacket material of the reaction kettle adjust the flow of the material in the jacket of the reaction kettle during the feedforward control so as to realize the control of the temperature of the reaction kettle at each moment.
In one embodiment, the above step S12 can be implemented as the following steps S21-S22:
in step S21, obtaining the mass heat capacity of the material inside the reaction kettle, the mass of the material inside the reaction kettle, the time interval recorded by the data of the previous batch, and the mass heat capacity of the jacket material of the reaction kettle;
in step S22, the adjustment amount of the flow rate of the jacket material of the reaction vessel is determined according to the temperature value of the jacket material of the reaction vessel in the current production process, the deviation between the historical operating data and the set parameter, the mass heat capacity of the material inside the reaction vessel, the mass of the material inside the reaction vessel, the time interval recorded by the previous batch data, and the mass heat capacity of the jacket material of the reaction vessel.
In one embodiment, the above step S22 can be implemented as the following steps:
substituting the temperature value of the jacket material of the reaction kettle, the historical operating data, the set parameters, the mass heat capacity of the material in the reaction kettle, the mass of the material in the reaction kettle, the time interval recorded by the data of the previous batch and the mass heat capacity of the jacket material of the reaction kettle into the following formula to determine the adjustment amount of the flow rate of the jacket material of the reaction kettle:
wherein, Δ Fjacket[i]The amount of the material flow of the reaction kettle jacket is adjusted;
the mass heat capacity of the materials in the reaction kettle; mrectorThe mass of the materials in the reaction kettle; pv [ i ]]The ith temperature data recorded in the historical operating data set; sp [ i ]]Setting the ith temperature data in the parameter array; t is tintervalThe time interval recorded for the previous batch of data;
the mass heat capacity of the jacket material of the reaction kettle; t isjacketThe temperature of the jacket material of the reaction kettle; wherein, the [ alpha ], [ beta ] -a]For rounding calculations, n is a positive integer.
In one embodiment, the above step S13 may be implemented as the following steps A1-A3:
in step A1, obtaining historical operation data, temperature difference between the reaction kettle and jacket materials in single batch operation, mass flow of the jacket materials of the reaction kettle, temperature fluctuation period inside the reaction kettle, and peak time difference between jacket water flow fluctuation and temperature fluctuation inside the reaction kettle;
in step a2, determining an advance corresponding to the adjustment amount of the jacket material of the reaction kettle according to the temperature value of the jacket material of the reaction kettle, the adjustment amount of the flow rate of the jacket material of the reaction kettle, historical operation data, the temperature difference between the jacket material and the reaction kettle in single batch operation, the mass flow rate of the jacket material of the reaction kettle, the internal temperature fluctuation period of the reaction kettle, and the peak time difference between the jacket water flow fluctuation and the internal temperature fluctuation of the reaction kettle;
in step a3, determining an adjustment timing corresponding to the adjustment amount of the jacket material of the reaction kettle when performing feed-forward control on the temperature of the reaction kettle according to the advance corresponding to the adjustment amount of the jacket material of the reaction kettle.
The method has the advantages that the advance corresponding to the adjustment quantity of the jacket material of the reaction kettle can be determined, so that the adjustment time corresponding to the adjustment quantity of the jacket material of the reaction kettle when the feed-forward control is carried out on the temperature of the reaction kettle is determined according to the advance corresponding to the adjustment quantity of the jacket material of the reaction kettle, and the feed-forward control on the temperature of the reaction kettle is realized according to the advance corresponding to the adjustment quantity of the jacket material of the reaction kettle.
In one embodiment, the above step a2 can be implemented as the following steps:
wherein n isadjust[i]The lead corresponding to the adjustment amount of the jacket material of the reaction kettle; pv [ i ]](ii) the ith temperature data recorded for the historical operating dataset; t isjacketThe temperature of the jacket material of the reaction kettle; delta t is the temperature difference between the reaction kettle and the jacket material when in single-batch operation; fjacketMass flow of the jacket material of the reaction kettle; Δ Fjacket[i]The amount of the material flow of the reaction kettle jacket is adjusted; t isTIs the period of fluctuation of the internal temperature of the reaction kettle, TDThe peak time difference between the flow fluctuation of the jacket material and the temperature fluctuation in the reaction kettle is obtained; t is tintervalThe time interval of the last batch of data records.
In one embodiment, the above step a3 can be implemented as the following steps:
solving for i-nadjust[i]A value;
if i-nadjust[i]If the value is less than or equal to 1, the adjusting time corresponding to the ith material adjusting amount is the preset time corresponding to the first adjustment of the jacket material of the reaction kettle;
if i-nadjust[i]If the value is more than 1, the adjustment time corresponding to the ith adjustment amount is the preset i-n time for carrying out the ith-n time on the jacket material of the reaction kettleadjust[i]And adjusting the corresponding time.
In one embodiment, as shown in FIG. 3, the above step S14 can be implemented as the following steps S31-S32:
in step S31, determining a feed-forward value of the reactor jacket material adjustment amount according to the reactor jacket material adjustment amount, the adjustment timing, and the advance amount;
in step S32, the material flow rate in the reactor jacket is adjusted according to the feed forward value.
In one embodiment, the above step S31 can be implemented as the following steps B1-B2:
in step B1, when an adjustment timing of the jacket material of the reaction kettle corresponds to only one adjustment amount of the jacket material of the reaction kettle, determining that the adjustment amount of the jacket material of the reaction kettle corresponding to the adjustment timing is a feed-forward value of the adjustment amount of the jacket material of the reaction kettle;
in step B2, when an adjustment timing of the reactor jacket material corresponds to a plurality of adjustment amounts of the reactor jacket material, determining a sum of the adjustment amounts of the reactor jacket material corresponding to the adjustment timing as a feed-forward value of the adjustment amounts of the reactor jacket material.
Fig. 5 is a schematic diagram of a hardware structure of a temperature control system 500 of a reaction vessel according to the present application, including:
at least one processor 520; and the number of the first and second groups,
a memory 504 communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to implement the method of controlling the temperature of a reaction vessel as described in any one of the above embodiments.
Referring to fig. 5, the reactor temperature control system 500 may include one or more of the following components: processing component 502, memory 504, power component 506, multimedia component 508, audio component 510, input/output (I/O) interface 512, sensor component 514, and communication component 516.
The processing assembly 502 generally controls the overall operation of the reactor temperature control system 500. The processing components 502 may include one or more processors 520 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 502 can include one or more modules that facilitate interaction between the processing component 502 and other components. For example, the processing component 502 can include a multimedia module to facilitate interaction between the multimedia component 508 and the processing component 502.
The memory 504 is configured to store various types of data to support operation of the reactor temperature control system 500. Examples of such data include instructions for any application or method operating on the reactor temperature control system 500, such as text, pictures, video, and the like. The memory 504 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The multimedia assembly 508 includes a screen that provides an output interface between the reaction vessel temperature control system 500 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 508 may also include a front facing camera and/or a rear facing camera. When the reactor temperature control system 500 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and/or the rear-facing camera can receive external multimedia data. Each of the front camera and the rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 510 is configured to output and/or input audio signals. For example, the audio assembly 510 includes a Microphone (MIC) configured to receive an external audio signal when the autoclave temperature control system 500 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 504 or transmitted via the communication component 516. In some embodiments, audio component 510 further includes a speaker for outputting audio signals.
The I/O interface 512 provides an interface between the processing component 502 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor assembly 514 includes one or more sensors for providing various aspects of condition assessment for the reactor temperature control system 500. For example, the sensor assembly 514 may include an acoustic sensor. In addition, sensor assembly 514 may detect an open/closed state of reactor temperature control system 500, the relative positioning of the components, such as the display and keypad of reactor temperature control system 500, and sensor assembly 514 may also detect a change in the position of reactor temperature control system 500 or a component of reactor temperature control system 500, the presence or absence of user contact with reactor temperature control system 500, the orientation or acceleration/deceleration of reactor temperature control system 500, and a change in the temperature of reactor temperature control system 500. The sensor assembly 514 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 514 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 514 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 516 is configured to enable the reactor temperature control system 500 to provide wired or wireless communication capabilities with other devices and cloud platforms. The reaction vessel temperature control system 500 may have access to a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 516 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 516 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the reaction vessel temperature control system 500 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components for performing the above-described reaction vessel temperature control method.
The present application also provides a computer-readable storage medium, wherein when instructions in the storage medium are executed by a processor corresponding to the reaction kettle temperature control system, the reaction kettle temperature control system can implement the reaction kettle temperature control method described in any one of the embodiments.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A method for controlling the temperature of a reaction vessel, comprising:
in the production process of the reaction kettle, acquiring historical operating data, set parameters and temperature values of jacket materials of the reaction kettle in the production process of a batch of secondary production of the reaction kettle;
determining the adjustment quantity of the flow of the jacket material of the reaction kettle according to the historical operation data, the temperature value of the jacket material of the reaction kettle in the production process and the set parameters;
determining the adjusting time corresponding to the adjusting quantity of the jacket material of the reaction kettle when the temperature of the reaction kettle is subjected to feedforward control according to the temperature value of the jacket material of the reaction kettle and the adjusting quantity of the flow of the jacket material of the reaction kettle;
and adjusting the material flow in the reaction kettle jacket according to the adjustment amount and the adjustment time of the material flow of the reaction kettle jacket so as to realize the control of the temperature of the reaction kettle at each moment.
2. The method of claim 1, wherein determining the adjustment amount of the flow rate of the reactor jacket material according to the historical operating data, the temperature value of the reactor jacket material in the current production process and the set parameters comprises:
acquiring the mass heat capacity of materials in the reaction kettle, the mass of the materials in the reaction kettle, the time interval of the last batch of data record and the mass heat capacity of the jacket materials of the reaction kettle;
and determining the adjustment quantity of the flow of the jacket material of the reaction kettle according to the temperature value of the jacket material of the reaction kettle, the deviation of the historical operating data and the set parameters, the mass heat capacity of the materials in the reaction kettle, the mass of the materials in the reaction kettle, the time interval recorded by the data of the previous batch and the mass heat capacity of the jacket material of the reaction kettle in the production process.
3. The method of claim 2, wherein determining the adjustment amount of the flow rate of the jacket material of the reaction vessel based on the temperature value of the jacket material of the reaction vessel, the deviation of the historical operating data and the setting parameter, the mass heat capacity of the material in the reaction vessel, the mass of the material in the reaction vessel, the time interval recorded by the data of the previous batch and the mass heat capacity of the jacket material of the reaction vessel in the current production process comprises:
substituting the temperature value of the jacket material of the reaction kettle, the historical operating data, the set parameters, the mass heat capacity of the material in the reaction kettle, the mass of the material in the reaction kettle, the time interval recorded by the data of the previous batch and the mass heat capacity of the jacket material of the reaction kettle into the following formula to determine the adjustment quantity of the flow of the jacket material of the reaction kettle:
wherein, Δ Fjacket[i]The amount of the material flow of the reaction kettle jacket is adjusted;
the mass heat capacity of the materials in the reaction kettle; mrectorThe mass of the materials in the reaction kettle; pv [ i ]]The ith temperature data recorded in the historical operating data set; sp [ 2 ]]Setting the ith temperature data in the parameter array; t is tintervalThe time interval recorded for the previous batch of data;
the mass heat capacity of the jacket material of the reaction kettle; t isjacketThe temperature of the jacket material of the reaction kettle; wherein, the [ alpha ], [ beta ] -a]For rounding calculations, n is a positive integer.
4. The method of claim 1, wherein the determining the timing of the adjustment of the reactor jacket material adjustment based on the temperature of the reactor jacket material and the adjustment of the flow rate of the reactor jacket material during the feedforward control of the reactor temperature comprises:
acquiring historical operation data, the temperature difference between a reaction kettle and a jacket material during single batch operation, the mass flow of the jacket material of the reaction kettle, the fluctuation period of the internal temperature of the reaction kettle, and the peak time difference between the fluctuation of the water flow of the jacket and the fluctuation of the internal temperature of the reaction kettle;
determining an advance corresponding to the adjustment quantity of the jacket material of the reaction kettle according to the temperature value of the jacket material of the reaction kettle, the adjustment quantity of the flow of the jacket material of the reaction kettle, historical operation data, the temperature difference between the jacket material and the reaction kettle in single batch operation, the mass flow of the jacket material of the reaction kettle, the fluctuation cycle of the internal temperature of the reaction kettle, and the peak time difference between the fluctuation of the flow of the jacket water and the fluctuation of the internal temperature of the reaction kettle;
and determining the adjusting time corresponding to the adjusting quantity of the jacket material of the reaction kettle when the feedforward control is carried out on the temperature of the reaction kettle according to the advance corresponding to the adjusting quantity of the jacket material of the reaction kettle.
5. The method of claim 4, wherein determining the lead corresponding to the adjustment of the reactor jacket material based on the temperature value of the reactor jacket material, the adjustment of the flow rate of the reactor jacket material, historical operating data, the temperature difference between the reactor and the jacket material during single batch operation, the mass flow rate of the reactor jacket material, the period of the fluctuation of the internal temperature of the reactor, and the peak time difference between the fluctuation of the flow rate of the jacket water and the fluctuation of the internal temperature of the reactor comprises:
wherein n isadjust[i]The lead corresponding to the adjustment amount of the jacket material of the reaction kettle; pv [ i ]]The ith temperature data recorded in the historical operating data set; t isjacketThe temperature of the jacket material of the reaction kettle; delta t is the temperature difference between the reaction kettle and the jacket material during single batch operation; fjacketMass flow of the jacket material of the reaction kettle; Δ Fjacket[i]The amount of the material flow of the reaction kettle jacket is adjusted; t isTIs the period of fluctuation of the internal temperature of the reaction kettle, TDThe peak time difference between the flow fluctuation of the jacket material and the temperature fluctuation in the reaction kettle is obtained; t is tintervalThe time interval of the last batch of data records.
6. The method of claim 5, wherein determining the timing of the adjustment of the amount of the jacket material in the reactor during the feedforward control of the temperature of the reactor according to the advance of the amount of the jacket material in the reactor, comprises:
solving for i-nadjust[i]A value;
if i-nadjust[i]If the value is less than or equal to 1, the adjusting time corresponding to the ith material adjusting amount is the preset time corresponding to the first adjustment of the jacket material of the reaction kettle;
if i-nadjust[i]If the value is more than 1, the adjustment time corresponding to the ith adjustment amount is the preset i-n time for carrying out the ith-n time on the jacket material of the reaction kettleadjust[i]And adjusting the corresponding time.
7. The method of claim 6, wherein said adjusting the flow of material in the reactor jacket based on the amount and timing of the adjustment of the flow of material in the reactor jacket comprises:
determining a feed-forward value of the adjustment quantity of the jacket material of the reaction kettle according to the adjustment quantity of the jacket material of the reaction kettle, the adjustment time and the advance quantity;
and adjusting the material flow in the reaction kettle jacket according to the feed-forward value.
8. The method of claim 7, wherein said determining a feed forward value for said reactor jacket material adjustment based on said reactor jacket material adjustment, an adjustment timing, and said advance comprises:
when one adjusting time of the jacket materials of the reaction kettle only corresponds to one adjusting quantity of the jacket materials of the reaction kettle, determining the adjusting quantity of the jacket materials of the reaction kettle corresponding to the adjusting time as a feed-forward value of the adjusting quantity of the jacket materials of the reaction kettle;
when one adjusting time of the jacket materials of the reaction kettle corresponds to a plurality of jacket material adjusting quantities of the reaction kettle, determining the sum of the plurality of jacket material adjusting quantities of the reaction kettle corresponding to the adjusting time as a feedforward value of the jacket material adjusting quantities of the reaction kettle.
9. A reaction vessel temperature control system, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to implement the method of any one of claims 1-8.
10. A computer-readable storage medium, wherein instructions in the storage medium, when executed by a corresponding processor of a reactor temperature control system, enable the reactor temperature control system to implement the reactor temperature control method of any one of claims 1-8.
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