Egg Tray Moisture Drying Tunnel Oven

The Egg Tray Moisture Drying Tunnel Oven is an industrial continuous drying equipment that uses a continuous conveying system combined with heating technologies such as hot air circulation, radiation heating, or microwave heating to rapidly evaporate and remove residual moisture from egg trays and pulp molded products.The equipment is mainly designed for efficient dehydration and drying of paper pulp molded products, enabling high-volume automated production.

Equipment Applications

Pulp Egg Tray Manufacturing Industry

Used for rapid drying of newly formed pulp products with high moisture content (typically 60%–70%), including:

Egg trays

Egg cartons

Other pulp molded packaging products

Industrial Paper Pulp Packaging Industry

Used for drying protective pulp inserts and cushioning materials for:

Electronic products

Household appliances

Instruments and equipment

Fruit and Vegetable Tray Production

Used for dehydration and drying of pulp trays designed for transportation of fruits such as:

Apples

Pears

Other agricultural products

Medical Pulp Molded Products

Used for drying environmentally friendly disposable medical consumables, such as:

Pulp bedpans

Pulp urinals

Other disposable medical paper products

Applicable Industry Standards

The design and manufacturing of this equipment generally follow the following standards (depending on specific countries and regions):

GB/T 31052

General safety requirements for machinery and industrial heating equipment.

GB 5226.1

Safety of machinery — Electrical equipment of machines, Part 1: General technical requirements.

JB/T 11384

Technical requirements and energy efficiency standards for tunnel drying machines.

Environmental Protection and Hygiene Standards

The equipment should comply with:

Local industrial exhaust emission requirements

Hygiene requirements for food-grade packaging production processes

Equipment Features

Continuous Automated Production

The conveyor system automatically loads and unloads products and can be directly connected with upstream molding machines, achieving high-capacity continuous production.

Precise Temperature Control

Adopts multi-zone independent temperature control with microcomputer/PLC regulation to ensure stable drying quality at each processing stage.

High Efficiency and Energy Saving

Equipped with hot air circulation and heat recovery systems to reduce heat loss and lower overall energy consumption.

Multiple Heating Source Options

According to customer energy conditions, the equipment can use different heating sources, including:

Natural gas

Steam

Biomass pellets

Diesel

Electric heating

FAQ

Q1: What is the typical drying cycle of an egg tray drying tunnel oven?

A: The drying time depends on the thickness of the egg tray and the initial moisture content. Generally, the residence time inside the tunnel oven is about 15–30 minutes.

Q2: What is the most commonly used heating source for this equipment?

A: Natural gas and steam are the most commonly used heating sources.

Natural gas heating provides low operating costs and good environmental performance. Factories equipped with boilers may also utilize waste heat steam for drying.

Q3: How can deformation of egg trays be prevented during the drying process?

A: The problem is solved through multi-stage temperature control:

Low-temperature moisture removal stage at the beginning

High-temperature drying stage in the middle

Cooling and shaping stage at the end

This gradual drying process effectively prevents deformation and shrinkage.

Q4: Does the equipment require a large installation area? How long is the drying tunnel?

A: The equipment generally requires a relatively long installation space. According to production capacity requirements, a single-layer tunnel oven is usually 20–50 meters long.

Multi-layer tunnel oven structures can also be designed to reduce floor space while maintaining production capacity.

Q5: What are the main daily maintenance requirements?

A: Daily maintenance mainly includes:

Regular cleaning of paper scraps and dust inside the drying chamber to prevent fire risks

Checking lubrication conditions of conveyor chains

Regular calibration and inspection of temperature sensor accuracy

Proper maintenance helps ensure stable operation and extends equipment service life.