Single-Layer Chamber Clay Bricks Making Drying Machine Tunnel Dryer Brick Oven

I. Structural Features:

1. Channel-type tunnel structure with a single-layer track inside.

2. Hot air is supplied by dedicated heat sources (such as kiln waste heat, hot air furnaces) and blown uniformly along the tunnel direction through fans.

3. Brick green bodies advance at a constant speed on kiln cars, sequentially undergoing prehe

1. Through-type single-layer tunnel dryer: Features low equipment investment and simple operation, making it suitable for medium and small brick factories with relatively fixed processes; 

2. Recirculating single-layer tunnel dryer: Characterized by higher equipment complexity and investment, but offers better drying performance and energy efficiency, suitable for large brick factories and diversified product production.

Block drying rooms are key equipment in brick production, primarily used to remove moisture from brick blanks to prevent cracking or deformation during the firing process. Depending on structural form, heat source type, and degree of automation, common block drying rooms mainly include the following categories:

I. Classification by Structural Form

1. Tunnel Dryers

Characteristics: Continuous operation, suitable for large-scale production. Brick blanks are pushed into the dryer by drying cars and move slowly along tracks, undergoing four stages: preheating, heating up, high-temperature drying, and cooling.

Advantages: Short drying cycle (generally 8~24 hours), uniform hot air distribution, low energy consumption.

Applicable Scenarios: Large-scale production of sintered bricks, load-bearing hollow bricks, etc.

2. Chamber Dryers

Characteristics: Intermittent operation, batch feeding and batch discharging, simple structure, low investment.

Advantages: Suitable for small and medium-sized enterprises or trial production of special varieties, flexible operation.

Limitations: Lower thermal efficiency, higher risk of uneven drying.

3. Vertical Dry Kilns

Characteristics: Vertically arranged, utilizing gravity to allow material to flow downward from top to bottom, saving floor space.

Application: Mostly used for powder or granular materials; less commonly used for brick blanks, but with attempts in specific processes.

II. Classification by Heat Source

1. Waste Heat Utilization Dryers

Utilize waste heat from the exhaust and cooling sections of the firing kiln as the heat source, resulting in significant energy savings. Common in modern brick factories, often used in conjunction with tunnel dryers, reducing operating costs by over 20%.

2. Steam Heated Dryers

Use saturated steam as the heating medium, heating the kiln air through aluminum fin heaters. Temperature control is stable, suitable for red bricks or special bricks with high requirements for temperature and humidity.

3. Coal/Gas Direct-Fired Dryers

Heat air directly through a combustion furnace, with rapid temperature rise and low initial investment. The disadvantage is higher pollution, and they are gradually being replaced by environmentally friendly equipment.

III. Core Components

A complete block drying room typically consists of the following systems:

- Kiln Structure: Brick-concrete or metal structure with an insulation layer to reduce heat loss.

- Heating System: Includes fire pits, furnaces, chimneys, or steam pipelines.

- Ventilation System: Equipped with high-temperature resistant fans to achieve hot air circulation, commonly featuring combinations of under-air supply, side-air supply, and upper-moisture exhaust.

- Moisture Removal System: Regulates humidity by adjusting through roof exhaust ports or side wall air inlet holes to ensure timely removal of moisture.

- Control System: Primarily manual control (for ordinary dryers) or equipped with temperature and humidity sensors and PLC automatic regulation (for modern dryers).

IV. Selection Recommendations

- Production Volume Orientation: For daily output exceeding 100,000 blocks, prioritize tunnel dryers; for small batches, chamber dryers can be selected.

- Energy Saving Requirements: It is recommended to (kiln waste heat recovery system) to reduce fuel consumption.

- Automation Level: Large production lines should be equipped with variable frequency fans + intelligent temperature control systems to improve drying stability.