Supercritical Water Oil Purification Pressure Buffering and Discharge
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Solution Overview
Problem
High-pressure fluid processes, such as supercritical water treatment of used oil, face challenges in efficiently feeding fluids at high pressure and discharging them at ambient pressure while minimizing turbulence and remixing of phases, leading to reactor and pipeline precipitation issues.
Innovation Solution
The apparatus employs free piston reciprocating pumps with a fluid pressure buffer system, alternating high- and low-pressure cycles, and a pipeline pig cleaning system to manage pressure transitions and reduce turbulence during discharge, ensuring efficient fluid handling and cleaning of pipelines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional pressure reduction methods are used during discharge, then pressure is reduced efficiently, but turbulence and remixing of liquid phases occur
Solution Approach 1:
The pressure reduction valve is designed with a movable needle that can dynamically adjust the opening area. The valve transitions from a fully closed state to a gradually opening state, controlling the pressure reduction rate dynamically. This dynamic control allows efficient pressure reduction while minimizing turbulence and maintaining phase separation stability.
Solution Approach 2:
The invention changes the pressure parameter in a controlled manner during discharge. By adjusting the valve opening area, the pressure reduction rate is optimized to balance between discharge efficiency and maintaining stable phase separation, preventing remixing of liquid phases.
2Stress or pressure
If high pressure is maintained throughout the discharge process, then phase separation is maintained, but pressure reduction to ambient pressure is not achieved
Solution Approach 1:
The system performs preliminary pressure reduction in stages before final discharge to ambient pressure. The pressure reduction valve gradually reduces pressure from high process pressure to intermediate levels, and finally to ambient pressure, making the discharge operation feasible while maintaining phase separation during the transition.
Solution Approach 2:
The pressure reduction process occurs in periodic stages: first maintaining high pressure for phase separation, then gradually reducing pressure through controlled valve opening, and finally discharging to ambient pressure. This periodic action resolves the contradiction between maintaining pressure and achieving discharge.
3Productivity
If rapid pressure reduction is implemented, then discharge efficiency is improved, but turbulence increases causing phase remixing
Solution Approach 1:
The pressure reduction valve provides dynamic control over the pressure reduction rate. By adjusting the needle position, the system can control the opening area to achieve optimal pressure reduction speed that maintains both discharge efficiency and phase separation stability, avoiding excessive turbulence.
Solution Approach 2:
The invention optimizes the pressure reduction parameter by controlling the valve opening area. This parameter change allows the system to achieve efficient discharge while maintaining stable phase separation, preventing the turbulence that would cause phase remixing.
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
This solution enables efficient feeding and discharging of high-pressure fluids with minimal turbulence and remixing, effectively addressing the challenges of pressure management and pipeline cleaning in high-pressure processes, ensuring continuous and non-turbulent fluid flow.
Implementation Method 1
a fluid pressure buffer system including at least one buffer fluid pump that is in fluid communication with the fluid feed and fluid discharge pumps... alternating high- and low-pressure cycles
Implementation Method 2
pipeline pig cleaning apparatus and methods for use with such apparatus and processes
Data Source
AI summary
This present disclosure relates to feeding and discharging fluids to and from a high-pressure process and is described using the example of supercritical water treatment of used oil. The apparatus comprises a fluid feed pump that feeds unprocessed process fluid into a high-pressure process, a fluid discharge pump and a fluid pressure buffer system.