Layered Temperature Control Dehumidifying Element
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Solution Overview
Problem
Conventional adsorption type compressed air drying devices suffer from energy loss and non-uniform temperature distribution during the regeneration process, leading to prolonged regeneration time and increased energy consumption due to heat and mass transfer between hot air and pipeline walls, and convection-based heating.
Innovation Solution
A dehumidifying unit with a direct heating desorption material wound on ribbed frames, featuring a preheater for uniform temperature control, temperature sensors for feedback, and a layered temperature control method that maintains regeneration temperature within a tolerable range, reducing energy consumption and improving regeneration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hot air is used for moisture desorption and adsorbent regeneration, then the adsorbent can be regenerated effectively, but heat and mass transfer occurs between the hot air and pipeline walls causing energy loss
Solution Approach 1:
The patent extracts the heating function from the pipeline system and concentrates it directly at the adsorbent location. By placing heating elements within the adsorption towers, the system eliminates the need to heat large volumes of air in pipelines, thereby reducing heat loss to pipeline walls while maintaining effective adsorbent regeneration.
Solution Approach 2:
The patent introduces heating elements as intermediaries between the energy source and the adsorbent. These heating elements directly heat the adsorbent material without requiring large volumes of hot air to be circulated through pipelines, thus eliminating the harmful heat transfer to pipeline walls while still achieving effective regeneration.
2Reliability
If hot air convection is used to heat the adsorbent, then the adsorbent can be regenerated, but non-uniform temperature distribution occurs with highest temperature at inlet and lowest at outlet, prolonging regeneration time
Solution Approach 1:
The patent segments the heating function into multiple distributed heating elements positioned throughout the adsorption tower. This segmentation allows simultaneous heating at multiple locations within the adsorbent bed, creating uniform temperature distribution and eliminating the time delay associated with sequential heating from inlet to outlet.
Solution Approach 2:
The patent transitions from one-dimensional convective heating (hot air flowing through the adsorbent bed) to three-dimensional direct heating (heating elements distributed throughout the adsorbent bed). This dimensional change enables simultaneous heating throughout the entire adsorbent volume, achieving uniform temperature distribution and significantly reducing regeneration time.
3Reliability
If conventional heating process is used, then lower-temperature waste air must be discharged first, but this increases energy consumption
Solution Approach 1:
The patent replaces the mechanical convective heating system with a direct electrical or thermal heating system. Instead of using hot air convection to transfer heat, the system uses heating elements that directly convert energy to heat the adsorbent, eliminating the need to heat and circulate large volumes of air and thereby reducing energy consumption.
Solution Approach 2:
The patent changes the heating parameter from indirect convective heating to direct heating. By using heating elements that directly contact or are positioned within the adsorbent bed, the system achieves rapid and efficient heating without the energy losses associated with heating and circulating large volumes of air, thus reducing overall energy consumption.
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 solution achieves uniform temperature control during the regeneration process, enhancing the dehumidification performance and reducing energy consumption by optimizing the heating and cooling processes.
Implementation Method 1
an adsorbent, such as silica gel, zeolite or activated carbon, is filled in the adsorption towers. The adsorbent is used for dehumidifying air by adsorption
Implementation Method 2
a heater is generally used to heat the adsorbent inside the adsorption tower to desorb moisture from the adsorbent and regenerate the adsorbent. To perform the moisture desorption and adsorbent regeneration process, air to be used for the process is first heated by radiation, convection or heat and mass transfer
Implementation Method 3
two conductive plates conductively connected to portions of the metal sheet exposed from the two desorption sides of the direct heating desorption material
Data Source
AI summary
A dehumidifying unit, a layered temperature control dehumidifying element, a drying device and a temperature control method thereof are provided. The dehumidifying element has a plurality of dehumidifying units. The dehumidifying units are made of a direct heating desorption material and used for dehumidifying air by adsorption and capable of being regenerated by desorption. By performing temperature compensation through a preheater and performing a layered temperature control method on the dehumidifying element, the disclosure achieves a uniform temperature control on the air flow passage of the dehumidifying element so as to improve regeneration performance of the dehumidifying element and reduce energy consumption of the drying device.