Steam Generation Control System Startup Venting
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Solution Overview
Problem
Steam generation apparatuses used in enhanced oil recovery require efficient control of process variables during startup and continuous operation to manage steam quality and pressure effectively, as existing systems lack comprehensive monitoring and control mechanisms.
Innovation Solution
A steam generation apparatus comprising a feedwater supply system, a steam generation system, and a delivery system, along with a control system that includes sensors, valves, and a programmable logic controller (PLC) to monitor and control physical parameters such as flow rate, pressure, and temperature, ensuring the quality and pressure of steam are within desired parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If comprehensive monitoring and control mechanisms are added to steam generation apparatus, then steam quality and pressure control is improved, but device complexity increases
Solution Approach 1:
The control system is segmented into multiple independent components including pressure sensors, temperature sensors, flow meters, and a PLC controller. Each component monitors a specific parameter and reports to the central controller, allowing distributed monitoring that improves reliability while keeping individual components simple and manageable.
Solution Approach 2:
The system implements feedback control where sensors continuously monitor steam pressure, temperature, and flow rate, and the PLC controller adjusts operational parameters in real-time based on this feedback. This closed-loop control ensures steam quality remains within desired parameters while automating the control process to manage system complexity.
2Measurement precision
If multiple sensors and control devices are installed, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The PLC controller serves multiple functions including data acquisition from various sensors, process control, alarm management, and data logging. This multi-functional approach consolidates what would otherwise require multiple separate control devices, maintaining measurement precision while reducing overall system complexity.
Solution Approach 2:
Multiple sensing functions (pressure, temperature, flow rate monitoring) are merged into a unified control system architecture where the PLC controller integrates data from all sensors and coordinates control actions. This consolidation maintains comprehensive monitoring capability while simplifying the control architecture compared to having separate standalone control systems for each parameter.
3Reliability
If steam is vented to reservoir during startup, then operational safety is improved, but loss of substance increases
Solution Approach 1:
During startup, the system performs preliminary venting of steam to the reservoir before connecting to the main delivery system. This preliminary action ensures that any contaminants, water carryover, or unstable steam conditions are eliminated before steam is directed to the oil reservoir, ensuring operational safety while minimizing subsequent steam loss through proper system conditioning.
Solution Approach 2:
The venting system is integrated into the startup sequence as an automatic self-service function. The PLC controller automatically activates venting during startup based on detected conditions, and the system self-regulates the venting process to achieve safe operating parameters without requiring manual intervention, thereby ensuring safety while optimizing steam utilization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus ensures efficient and safe operation by maintaining desired steam quality and pressure, optimizing oil recovery by effectively managing steam injection, reducing operational costs, and enhancing the durability and efficiency of the steam generation process.
Implementation Method 1
steam generation system... producing at least one of water and steam... capable of producing at least one of water and steam of varying quality
Implementation Method 2
feedwater supply system that includes a feedwater pump
Data Source
AI summary
The current disclosure relates to a method of steam generation. Particularly, the current disclosure relates to steam generation supply apparati and associated control systems that are used for enhanced oil recovery. Certain embodiments are provided including methods and associated control systems related to the startup as well as main steam pressure header control or maintenance of a desired steam quality for such steam generation systems during normal operation.