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US 12,611,616 B2Granted
System and method for managing crystallization process in a process control plant
AssigneeSiemens Aktiengesellschaft
InventorHarshad Nerurkar
Life of this patent
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Abstract
A method for managing crystallization process in a process control plant is provided. The method includes capturing process parameters of an operating reactor unit in a process control plant. The method includes predicting desired process parameters based on first set of parameters and the captured process parameters. The first set of parameters includes information related to process dynamics and process disturbances associated with the operating reactor unit. Furthermore, the method includes controlling process control loop associated with the operating reactor unit based on the desired process parameters and the first set of parameters.
Claims14
A method for crystallization cooling control in a process plant, the method comprising:
- capturing process parameters of an operating reactor unit in a process plant, wherein the process parameters are captured via one or more sensing unit;
- predicting desired process parameters based on first set of parameters and the captured process parameters, wherein the first set of parameters comprises information related to process dynamics and process disturbances associated with the operating reactor unit, where the step of predicting the desired process parameters further comprises:
- determining actual flow of utility into the operating reactor unit based on the captured process parameters;
- comparing the desired utility flow for the operating reactor unit with the actual flow of utility to determine a utility flow error value;
- generating a control signal indicating a change of position of a smart positioner associated with the operating reactor unit based on the utility flow error value;
- determining current position of the smart positioner using the captured process parameters;
- transmitting the generated control signal to the smart positioner via a control system;
- determining hysteresis value associated with the smart positioner;
- and
- repositioning the smart positioner based on the transmitted control signal, wherein the repositioning of the smart positioner rectifies the utility flow error value to zero value;
- and
- controlling process control loop associated with the operating reactor unit based on the desired process parameters, the first set of parameters and the utility flow error;
- wherein the process parameters comprise cooling rate, super saturation, temperature of the operating reactor unit, properties of utilities, parameters related to utility flow management, smart positioner properties, and the like and wherein the utility flow management comprises managing desired utility at desired temperature, at desired time, and at desired flow.
10 more elements
A process plant comprising:
- one or more operating reactor unit comprising:
- an enclosure capable of yielding a solid product from a solution through a crystallization process, wherein the enclosure comprises:
- a crystallization mass;
- and wherein:
- a mass temperature sensor for measuring temperature of the crystallization mass;
- one or more external temperature sensors for measuring utility jacket inlet and outlet temperature and steam inlet temperature;
- one or more flow meters for measuring one or more utility flow rate with respect to the one or more operating reactor unit and measuring steam flow rate;
- one or more automatic control valves comprising a smart positioner for positioning a control element and controlling flow of utility into the one or more operating reactor unit;
- and
- a control system coupled to the one or more automatic control valves, one or more flow meters, the mass temperature sensor and the one or more external temperature sensors, wherein the control system is programmed to:
- capture process parameters of the one or more operating reactor unit, wherein the process parameters are captured via the one or more flow meters, the mass temperature sensor and the one or more external temperature sensors;
- predict desired process parameters based on first set of parameters and the captured process parameters, wherein the first set of parameters comprises information related to process dynamics and process disturbances associated with the one or more operating reactor unit, where the step of predicting the desired process parameters further comprises:
- determining actual flow of utility into the operating reactor unit based on the captured process parameters;
- comparing the desired utility flow for the operating reactor unit with the actual flow of utility to determine a utility flow error value;
- generating a control signal indicating a change of position of a smart positioner associated with the operating reactor unit based on the utility flow error value;
- determining current position of the smart positioner using the captured process parameters;
- transmitting the generated control signal to the smart positioner via a control system;
- determine hysteresis value associated with the smart positioner;
- and repositioning the smart positioner based on the transmitted control signal, wherein the repositioning of the smart positioner rectifies the utility flow error value to zero value;
- and
- control process control loop associated with the one or more operating reactor unit based on the desired process parameters, the first set of parameters, and the utility flow error;
- wherein the process parameters comprise cooling rate, super saturation, temperature of the operating reactor unit, properties of utilities, parameters related to utility flow management, smart positioner properties, and the like and wherein the utility flow management comprises managing desired utility at desired temperature, at desired time, and at desired flow.
19 more elements
A control unit comprising:
- a processor;
- and
- a memory coupled to the processor, wherein the memory comprises a process control module stored in the form of machine-readable instructions and executable by the processor, wherein that the process control module is programmed to:
- capture process parameters of an operating reactor unit in a process plant, wherein the process parameters are captured via one or more sensing unit;
- predict desired process parameters based on first set of parameters and the captured process parameters, wherein the first set of parameters comprises information related to process dynamics and process disturbances associated with the operating reactor unit, where the step of predicting the desired process parameters further comprises:
- determining actual flow of utility into the operating reactor unit based on the captured process parameters;
- comparing the desired utility flow for the operating reactor unit with the actual flow of utility to determine a utility flow error value;
- generating a control signal indicating a change of position of a smart positioner associated with the operating reactor unit based on the utility flow error value;
- determining current position of the smart positioner using the captured process parameters;
- transmitting the generated control signal to the smart positioner via a control system;
- determining hysteresis value associated with the smart positioner;
- and
- repositioning the smart positioner based on the transmitted control signal, wherein the repositioning of the smart positioner rectifies the utility flow error value to zero value;
- and
- control process control loop associated with the operating reactor unit based on the desired process parameters, the first set of parameters and the utility error;
- wherein the process parameters comprise cooling rate, super saturation, temperature of the operating reactor unit, properties of utilities, parameters related to utility flow management, smart positioner properties, and the like and wherein the utility flow management comprises managing desired utility at desired temperature, at desired time, and at desired flow.
13 more elements
Dependencies are inferred from the claim text.