Controlled-Gradient Vapor Recompression for Scaling Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current vapor recompression systems face inefficiencies and equipment maintenance challenges due to corrosion, fouling, and scaling issues, particularly in industries like oil production, food processing, and desalination, where dissolved solids and ions affect energy usage and equipment longevity.
Innovation Solution
A controlled gradient system is implemented, where a core with closed channels is immersed in a boiling liquid column, recycling vapor to create a concentration profile and optimizing heat transfer by controlling mass, work, and energy flows, using sensors to predictively manage the process and maintain stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional heat exchangers are used for vapor recompression, then heat recovery can be achieved, but equipment suffers from corrosion, fouling, and scaling due to dissolved solids and ions
Solution Approach 1:
The patent introduces an intermediary fluid (such as a heat transfer fluid or working fluid) that mediates between the process stream containing dissolved solids and the heat recovery system. This intermediary fluid absorbs heat from the process stream and transfers it to the vapor compression system, preventing direct contact between the corrosive/dirty process fluid and the heat exchanger surfaces, thereby eliminating fouling, scaling, and corrosion while maintaining heat recovery efficiency
Solution Approach 2:
The system is divided into separate functional zones: a process stream handling zone for the dirty fluid containing dissolved solids, and a heat recovery zone for the clean working fluid. This segmentation allows each zone to be optimized independently - the process stream zone handles the harsh chemical environment while the heat recovery zone maintains clean heat exchange surfaces, resolving the contradiction between heat recovery and equipment durability
2Loss of energy
If vapor recompression is used for heat recovery in processes with dissolved solids, then energy can be recovered, but the dissolved materials increase energy consumption and damage equipment
Solution Approach 1:
The patent changes the operating parameters of the vapor compression system by using a working fluid with optimized thermodynamic properties that are insensitive to dissolved solids. The system operates at controlled temperature and pressure ranges that prevent scaling and fouling, maintaining consistent energy efficiency. The working fluid is selected to have phase change properties that maximize heat recovery while minimizing the energy required for compression, directly addressing the energy consumption issue caused by dissolved materials
3Loss of substance
If conventional distillation and evaporation methods are used, then water can be treated and reused, but the process is expensive and causes equipment damage from corrosion and scaling
Solution Approach 1:
The patent replaces conventional thermal distillation and evaporation systems with a vapor compression system that uses mechanical work (compression) rather than extensive thermal processing. This substitution reduces the total energy input required and eliminates the high-temperature conditions that cause scaling and corrosion, thereby reducing both operational costs and maintenance expenses while achieving the same water treatment and reuse objectives
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 approach enhances heat transfer coefficients and operational efficiency, reduces energy consumption, and minimizes equipment damage by managing concentration gradients and phase changes, leading to improved heat recovery and re-use in industrial processes.
Implementation Method 1
A controlled gradient of a material, such as, for example, total dissolved solids (TDS) in a boiling liquid column, such as a brine. Adjacent columns contain condensing vapors at an increased pressure. High heat transfer coefficients and effective stratified densification of the liquid are obtained by controlling mass flows, work, heat and the like
Implementation Method 2
Adjacent columns contain condensing vapors at an increased pressure
Implementation Method 3
desalination plants, sugar processing, distillation systems, and the like rely on recovery of latent heat in order to minimize net energy requirements
Implementation Method 4
A controlled gradient of a material, such as, for example, total dissolved solids (TDS) in a boiling liquid column
Implementation Method 5
High heat transfer coefficients and effective stratified densification of the liquid are obtained by controlling mass flows, work, heat and the like
Implementation Method 6
sensing and controlling predictively based on balancing mass, work, energy, and the rates of change thereof, include rates of change in the rates of change (second derivatives of values)
Data Source
AI summary
An accelerated vapor recompression apparatus 10 converts incoming flow 35a to a concentrate 35c by developing a concentration profile 146 within a tank 30 holding a liquid 23 containing dissolved solids. The resulting curve 160 of saturation temperature of the stratified liquid 23 (such as a brine 23 or other material 23) moves away from the curve 162 corresponding to fully mixed conditions. The shift 174, 180 in saturation temperature results in increased boiling without increased energy from a heater 70 or compressor 50. A method 90, 200 of control of the system provides interventions 203, 204, 205, 206 at different levels 92, 94, 96, 98 of control, ranging from mass flows 35 to work of a compressor 50, heat from a heater 70, and a predictive processing 215 of feedback 217 for controlling commands 216 algorithmically.