Thermo-Vacuum Drying Using Steam Ejector for Faster Moisture Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional drying methods are energy-intensive, time-consuming, and inefficient, leading to greenhouse gas emissions and water waste, with direct heat contact causing quality deterioration and VOC absorption in dried materials.
Innovation Solution
The thermo-vacuum drying method utilizes a closed cycle of heat and vacuum to evaporate moisture 5-10 times faster than conventional methods, with heat regeneration and water recycling, reducing energy consumption and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional thermal drying with direct heat contact is used, then drying capability is achieved, but energy consumption is high and drying time is prolonged
Solution Approach 1:
The invention changes the pressure parameter from atmospheric to vacuum conditions, which fundamentally alters the drying mechanism. Under vacuum, water evaporates at lower temperatures and the vapor is immediately removed, breaking the equilibrium that limits conventional drying. This parameter change enables faster drying with reduced energy input since sensible heating is minimized and latent heat is efficiently utilized for moisture removal.
Solution Approach 2:
The invention exploits the phase transition of water from liquid to vapor under vacuum conditions. By maintaining vacuum throughout the drying process, water rapidly transitions to vapor phase and is continuously evacuated, preventing re-condensation. This continuous phase transition driven by vacuum pressure differential is the core mechanism that achieves both high drying speed and energy efficiency.
2Loss of substance
If conventional thermal drying is used, then moisture is removed, but drying time is prolonged
Solution Approach 1:
The invention uses vacuum as an inert environment that favors moisture removal. The vacuum atmosphere prevents re-absorption of moisture vapor by the dried material and eliminates air interference in the drying process. This controlled inert environment ensures continuous unidirectional moisture transfer from the material to the vacuum space, achieving complete moisture removal in reduced time.
3Productivity
If direct heat contact drying is used, then drying efficiency is improved, but quality deterioration and VOC absorption occur
Solution Approach 1:
The invention introduces vacuum as an intermediary medium between the heat source and the material surface. Instead of direct heat contact, heat is transferred through the vacuum environment primarily via radiation and convection of hot gas streams that are rapidly removed. This intermediary vacuum environment prevents direct thermal degradation and VOC absorption while maintaining high drying efficiency through continuous vapor evacuation.
4Loss of substance
If conventional drying systems are used, then drying function is provided, but water is wasted and environmental impact increases
Solution Approach 1:
The invention implements water recovery by condensing the vapor removed under vacuum. The condensed water is collected and can be reused, transforming what would be waste in conventional systems into a recoverable resource. This recovery mechanism eliminates water loss and prevents the discharge of contaminated vapor to the environment, directly addressing both water conservation and environmental protection goals.
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 saves up to 50% of drying heat and nearly 100% of water, achieving a combined energy factor 50% higher than conventional dryers, with reduced operational costs and improved durability.
Implementation Method 1
a vacuum ejector driven by high-pressure gaseous flow... to evacuate evaporated moisture from the dryer vessel
Implementation Method 2
Heat is applied to the object in the dryer vessel to evaporate moisture from the object within the dryer vessel
Data Source
AI summary
Methods and systems for the thermo-vacuum drying and processing of objects such as clothes. A vacuum ejector driven by high-pressure steam is employed to evacuate evaporated moisture mixed with air from a dryer vessel producing an intensification of the drying process such as can significantly reduce the energy and time requirements for the drying process and increase water utilization.