Rotary Hemp Drying with Two-Stage CBD Preservation

Solution Overview

Problem

Conventional rotary dryers destroy cannabidiol (CBD) in hemp plants due to high heat exposure and moisture content, causing degradation and fire hazards.

Innovation Solution

A two-stage drying process using a modified rotary dryer with an offset hot air inlet, reduced inlet temperature, and unique flight design to preserve CBD, involving chopping hemp into segments and passing through the dryer twice with controlled temperatures and flight patterns to prevent direct heat exposure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional rotary dryers with high inlet temperatures are used to dry hemp stalks, then the moisture content is reduced effectively, but the cannabidiol (CBD) in the buds is destroyed

Engineering Contradiction:

Improvedrying efficiencyVSAvoidCBD degradation

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The hemp plant is divided into two distinct parts for processing: stalks and buds. The stalks are dried separately using high-temperature conventional rotary drying to reduce moisture content, while the buds are processed separately to preserve CBD. This segmentation allows each component to be treated according to its specific requirements without compromising the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The buds containing CBD are extracted or separated from the stalks before the drying process. This extraction allows the buds to be handled separately, preventing exposure to the high temperatures that would otherwise be necessary for effective stalk drying. The stalks can then be dried using conventional high-temperature methods without affecting the CBD in the buds.

Inventive Principle:

Principle #2Taking out (Extraction)

2Speed

If high temperature is applied to dry hemp with 60-80% moisture content, then drying speed increases, but CBD boiling and destruction occurs

Engineering Contradiction:

Improvedrying speedVSAvoidCBD destruction

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The hemp plant is divided into two distinct parts for processing: stalks and buds. The stalks are dried separately using high-temperature conventional rotary drying to reduce moisture content, while the buds are processed separately to preserve CBD. This segmentation allows each component to be treated according to its specific requirements without compromising the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The buds containing CBD are extracted or separated from the stalks before the drying process. This extraction allows the buds to be handled separately, preventing exposure to the high temperatures that would otherwise be necessary for effective stalk drying. The stalks can then be dried using conventional high-temperature methods without affecting the CBD in the buds.

Inventive Principle:

Principle #2Taking out (Extraction)

3Loss of time

If hemp stalks are stored with high moisture content, then processing can be delayed, but molding and decay occur quickly

Engineering Contradiction:

Improvestorage timeVSAvoidmolding and decay

Core Design Contradiction:

Loss of timeVSObject-affected harmful factors

Solution Approach 1:

The hemp plant is divided into two distinct parts for processing: stalks and buds. The stalks are dried separately using high-temperature conventional rotary drying to reduce moisture content, while the buds are processed separately to preserve CBD. This segmentation allows each component to be treated according to its specific requirements without compromising the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The buds containing CBD are extracted or separated from the stalks before the drying process. This extraction allows the buds to be handled separately, preventing exposure to the high temperatures that would otherwise be necessary for effective stalk drying. The stalks can then be dried using conventional high-temperature methods without affecting the CBD in the buds.

Inventive Principle:

Principle #2Taking out (Extraction)

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

Preserves CBD in hemp plants by maintaining temperatures below its boiling point and ensuring even drying, reducing moisture content from 60-80% to 10% without damaging the CBD.

Implementation Method 1

Bulk solids, such as agricultural products, are dried in the rotary drum by heat exchange between products and the carrier gas being circulated

Methodology Applied

Scientific EffectEvaporation: Evaporation

Implementation Method 2

a carrier gas circulation system for the drum

Methodology Applied

Scientific EffectConvection: Convection

Implementation Method 3

The interior surface of the drums include some form of flights or fins that lift the material as the drum rotates inside the cylinder

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS20260026539A1Hemp Drying Process

Publication Date: 2026.01.29 PLAYER TYLER

AI summary

A method of drying hemp plants using a rotary drying system that dries the plants without damaging the cannabidiol in the plants.