Pressurized Vessel Injection System for High-Pressure Convey Lines
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Solution Overview
Problem
Back pressure along the convey line in dry bulk sorbent injection systems limits the magnitude of convey pressure, hindering the effective delivery of sorbent materials for pollution control in industrial boilers and electric generating units.
Innovation Solution
A material delivery system that pressurizes vessels connected to the convey line via a pressurization line, allowing for higher convey pressures and reliable injection of sorbent materials into the flue ducts using a rotary feed device and multiple pressurized vessels, minimizing air leakage and pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If material is injected into the convey line at atmospheric pressure, then the vessel can be easily filled and pressurized, but the convey line pressure remains limited and cannot overcome back pressure effectively
Solution Approach 1:
The vessel is pre-pressurized to convey line pressure through the pressurization line before material injection. This preliminary pressurization ensures that the vessel internal pressure matches the convey line pressure, enabling effective material injection against back pressure without requiring the entire pressurization system to continuously maintain high pressure
Solution Approach 2:
The pressurization line acts as an intermediary component that selectively transfers pressure from the convey line to the vessel. This intermediate pressurization mechanism allows the vessel to be pressurized on-demand without requiring complex continuous pressurization systems, resolving the contradiction between achieving high convey line pressure and maintaining system simplicity
2Productivity
If back pressure is reduced in the convey line, then material flow rate increases, but the system cannot maintain high convey pressure needed for effective pollutant capture
Solution Approach 1:
The vessel is pre-pressurized to match convey line pressure before injection. This ensures that pressure differential is maintained across the injection point, allowing material to be injected into the high-pressure convey line without creating excessive back pressure that would reduce flow rate
Solution Approach 2:
The system changes the pressure parameter of the vessel dynamically by pressurizing it to match the convey line pressure. This parameter adjustment allows the vessel to inject material effectively into the high-pressure convey line, maintaining both high convey pressure and adequate material flow rate for pollutant capture
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 system achieves increased convey line pressure and flow rate, enabling more efficient injection of sorbent materials into flue ducts, thereby enhancing pollution control by reducing emissions of acid gases and mercury.
Implementation Method 1
the vessel is pressurized at the convey line pressure through connection to the convey line via a pressurization line upstream of the vessel
Data Source
AI summary
A conveying system for injecting material at a convey line pressure is disclosed. Material is injected into the convey line through a feed device from a pressurized vessel pressurized at the convey line pressure. In illustrated embodiments, the vessel is pressurized at the convey line pressure through connection to the convey line. As described, the vessel is connected to the convey line through a pressurization line to pressurize the vessel at the convey line pressure. In illustrated embodiments described the pressurization line is opened and closed via a valve to control pressurization of the vessel at the convey line pressure. In illustrated embodiments, convey line pressure is applied to multiple vessels of a conveying system through one or more pressurization lines to inject material into the convey line.