Industrial Drying & Dehydration Systems

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Tunnel Dryer

Introduction

A Tunnel Dryer is a continuous industrial drying system in which product is transported through a long, enclosed drying tunnel on carts, conveyor belts, hanging frames, or other carriers, while drying air is circulated through the tunnel to remove moisture from the product as it progresses from the wet inlet to the dry outlet. The tunnel format provides a large effective drying length within a relatively compact footprint through the use of an elongated drying path, and the ability to design multiple independently controlled temperature and humidity zones along the tunnel length allows the drying conditions to be precisely tailored to the moisture-release characteristics of the specific product. Tunnel dryers are used for an extremely wide range of products including food items (fruits, vegetables, pasta, meat products, crackers), pharmaceutical granules, ceramics, bricks, tiles, wood products, textiles, and agricultural materials.

Why Choose Kerone Tunnel Dryer

At Kerone, we manufacture various type of tunnel of varying shapes and sizes, with different tunnel construction, size of tunnel and tray capacity, length of tunnel, conveyer speed (Adjustable), rate of circulation of air, control panel and etc. Tunnel dryers are enhancement to the tray dryers, it makes the trays mobile. The material to be dried are fed from one end in the air heated tunnel for drying and collected from the other end. The name is derived due to its construction which looks like tunnel. In tunnel dryer based on the selection of technology the drying process can be completed while material transfers through tunnel.
The source of heating can be of 1) Hot air circulation 2) Infrared 3) Microwave or 4) Radio frequency.

Types and Features of Tunnel Dryer

Kerone manufactures several configurations of tunnel dryer, each optimized for specific industrial processes. Depending on material properties and production scale, options include continuous, batch, or hybrid models with stainless steel construction and advanced control interfaces. The systems integrate high-performance components such as air recirculation units, heat recovery modules, and smart sensors for process efficiency and energy savings.

Tunnel dryer commonly used to get manufactured with the hot air for drying of material, however the advancement in the heating technology has enabled the tunnel dryer with advanced and faster drying techniques such as microwave/ RF/ Infrared. Typically tunnel consist of door at one end that opened as closes when material is to be fed, when trolley is pushed or travelled in tunnel then door get closed and the hot air is circulated within tunnel with the help of fans, on completion of drying process the outlet gate opens and the material is collected. Air movement, circulation, and heating methods vary in tunnel dryers. Three different arrangements, namely, counterflow, parallel flow, and combined flow.

Features of Tunnel Dryers:

Insulated inner surface to eliminate energy loss and ensure maximum energy efficiency
High-quality heat exchanger that ensures low air moisture content
Enhanced handling and improved operational life
Roller or belt conveyor system to move the material efficiently
Strong construction to withstand moist materials and changing operating conditions
Advanced air circulation system to improve airflow and reduce drying time
Available in multiple length and width configurations
Accurately designed and calibrated control mechanism
Available in automated or semi-automated structures
Minimal environmental losses
Touchscreen control panel to set temperature and conveyor speed
Flexible integration of preferred drying technology
Uniform drying of all types of input materials
Long-lasting powder coating finish
Provision for multiple drying zones
Modular assembly for easy transport and installation
Engineered for controlled environments to ensure fast and trouble-free drying
Optimized air patterns for efficient and safe drying
Designed to handle a wide range of drying conditions

Key Features

High drying efficiency with precise temperature regulation.
Custom-built for specific material characteristics and moisture levels.
Energy-saving design with optimized air circulation and heat recovery.
Fully automatic operation with real-time process monitoring.
Durable stainless steel construction for hygiene and longevity.
Uniform drying with minimal product degradation or discoloration.
Suitable for continuous and batch processing modes.
User-friendly interface with programmable control systems.

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Our advanced AI, ML, and IoT technologies, this solution delivers smarter automation, real-time insights, and predictive intelligence to enhance efficiency and drive future-ready growth.

Real-Time Monitoring & Control

Continuous tracking of process parameters with instant adjustments.

Predictive Maintenance

Intelligent fault detection to prevent failures before they occur.

Adaptive Process Optimization

Dynamic tuning of operations for maximum output and efficiency.

Cloud Dashboards & Analytics

Unified access to real-time insights and performance trends.

Energy & Resource Savings

Smarter utilization of energy to cut costs and reduce waste.

Secure IoT Connectivity

Encrypted data flow with seamless integration across plant systems.

Applications of Tunnel Dryer

Kerone’s tunnel dryer are used in multiple industries where efficient moisture removal and product consistency are essential. Common applications include:

Food Industry

Drying of fish, seafood, spices, fruits, and vegetables.

Pharmaceutical

Moisture control for herbal extracts and powders.

Chemical

Drying of compounds, catalysts, and pigments.

Agriculture

Processing of seeds, grains, and herbs.

Industrial

Dehydration of materials requiring uniform temperature distribution.

Kerone’s tunnel dryer exemplify innovation, reliability, and customization. Built with advanced heating systems and intelligent control, they ensure high efficiency, uniform drying, and consistent output quality. From small-scale production to large industrial setups, Kerone continues to provide world-class drying technology to meet evolving market demands.