Vanillin

1. Material Overview

Vanillin, commonly known as vanilla powder, is one of the most produced synthetic flavorings. It possesses a strong and unique vanilla bean aroma, which is stable and does not easily volatilize at higher temperatures. It is susceptible to light and gradually oxidizes in air, and easily changes color when exposed to alkalis or alkaline substances. It can be used as a food additive, in the production of pharmaceutical intermediates, and also as a plant growth promoter, bactericide, lubricant defoamer, electroplating brightener, and conductive agent in printed circuit board production.

2. Process Introduction

The drying system adopts closed-loop circulation process with nitrogen protection for drying and cooling. The wet vanillin from the upstream section is fed into the fluid bed dryer. Inside the dryer, the material comes into contact with hot nitrogen above the air distribution plate, maintaining the fluidization state by suspending the material particles in the airflow. Dried product is cooling down by the cold nitrogen in the cooling section of the dryer, and it is finally discharged from the product outlet of dryer.

3. Technical Advantages

1) Utilizing closed-loop nitrogen circulation system with inert, sealed atmosphere can completely isolates oxygen, effectively preventing material oxidation.

2) The nitrogen circulation along with waste heat recovery ensures that hot air and nitrogen are not discharged externally, resulting in high heat utilization. Only a small amount of nitrogen needs to make up, and media loss and energy consumption are far lower than with open-loop nitrogen drying.

4. Technical Benefit

1) More stable product quality

Due to the closed inert atmosphere isolating external interference, combined with uniform temperature-controlled drying, materials remain free from oxidation and deterioration, resulting in high consistency in moisture content and quality, and significantly improved finished product qualification rate.

2) Lower overall operating costs

Closed-loop nitrogen recycling and efficient waste heat utilization significantly reduce energy consumption and nitrogen consumption; furthermore, the equipment has a simple structure and low failure rate, reducing daily maintenance and media usage costs simultaneously.

3) Environmental friendly protection

Fully enclosed operation eliminates waste gas and dust emissions, requiring no additional exhaust gas treatment equipment;

Continuous and stable operation can ensure large-scale production, reaching environmental standard without additional rectification risks.