The Zero-pressure Proportional Gas-fired Tunnel Furnace is a continuous gas-fired baking system that integrates a proportional control system with zero-pressure gas supply technology. This design ensures that—prior to entering the combustion system—the gas and air achieve pressure equilibrium and undergo thorough mixing. Featuring a tunnel-style structural design, the equipment facilitates a stable heating process as products are conveyed through it, making it ideally suited for high-volume, continuous production environments. Its core functionality relies on the synergistic interaction between a proportional motor and an air-fuel valve, which allows gas to enter the combustion stage at near-atmospheric pressure, thereby fundamentally enhancing combustion stability and thermal energy utilization efficiency. The system employs a multi-zone furnace chamber design; through independent temperature control systems in various sections, it enables the dynamic regulation of heat distribution while working in conjunction with a conveyor system to ensure the uniform transport of products. As a vital category of industrial-grade baking equipment, the Zero-pressure Proportional Gas-fired Tunnel Furnace occupies a pivotal position within modern food processing lines, serving as a fundamental cornerstone for achieving automated and continuous production.

1. Precise Control:

The Zero-pressure Proportional Gas-fired Tunnel Furnace employs an intelligent control system integrated with PID algorithms to provide real-time regulation of the gas-to-air ratio and temperature, maintaining temperature control accuracy within a range of ±1°C. A proportional motor, paired with an air-fuel valve, facilitates the dynamic mixing of gas and air, thereby eliminating the combustion fluctuation issues commonly associated with traditional systems. The entire unit supports independent control across multiple temperature zones, ensuring that different products processed within the same equipment achieve consistent heating profiles—a critical requirement for meeting the strict consistency standards of industrial baking.

2. High Efficiency and Energy Savings:

The interior of the furnace chamber features an aluminized steel structure with a radiant reflectivity ranging from 50% to 70%, effectively enhancing thermal energy utilization. By leveraging zero-pressure combustion technology to minimize gas wastage, the Zero-pressure Proportional Gas-fired Tunnel Furnace achieves an overall energy consumption reduction of 15% to 25% compared to traditional equipment. The design incorporates thickened thermal insulation cotton to minimize heat loss and maintain a stable thermal environment within the furnace, thereby helping businesses reduce operational costs during high-volume production runs.

3. Stable Combustion:

Through zero-pressure proportional mixing technology, this equipment ensures that gas is thoroughly blended with air before entering the combustion zone, resulting in significantly enhanced flame stability. The combustion pressure operates close to atmospheric pressure, thereby mitigating the risks of flashback and incomplete combustion. During prolonged operation, the Zero-pressure Proportional Gas-fired Tunnel Furnace maintains a continuous and stable output, reducing the likelihood of downtime and boosting the production line's capacity for continuous operation.

4. Durable Construction:

The conveyor chains and guide rails are fabricated from high-strength manganese steel, offering exceptional heat resistance; this material choice extends their service life by 30% to 50% under long-term operating conditions. The furnace body structure is engineered using industrial-grade steel, designed to withstand the demands of heavy-load, continuous production environments. The Zero-pressure Proportional Gas-fired Tunnel Furnace retains its mechanical stability even under high-temperature conditions, thereby reducing the frequency of maintenance and lowering replacement costs.

5. Uniform Baking:

The rear section of the equipment is equipped with a multi-stage adjustable heat intensity system, allowing for the precise distribution of thermal energy based on specific product requirements. The final two zones feature a hot air circulation structure that ensures uniform heat distribution throughout the furnace chamber, effectively eliminating issues related to localized overheating. Consequently, the Zero-pressure Proportional Gas-fired Tunnel Furnace enables precise control over product coloration consistency, minimizes baking variations, and enhances the overall quality stability of the finished products.

1. Bread Production Facilities:

In industrialized bread production, the Zero-pressure Proportional Gas-fired Tunnel Furnace is utilized for the continuous baking of products such as sandwich loaves and dinner rolls. Designed to accommodate standard 400×600 baking trays, the equipment ensures stable conveyance and uniform heating. Through multi-zone temperature control, the internal texture and external coloration of the bread remain consistent, thereby enhancing product standardization and meeting the demands of large-scale production.

2. Biscuit Processing Plants:

Biscuit production imposes strict requirements on temperature profiles; this equipment facilitates precise control over product expansion and shaping through temperature regulation across various furnace zones. The Zero-pressure Proportional Gas-fired Tunnel Furnace supports multiple configurations—such as three-tray and four-tray structures—to maximize production output efficiency. Its stable combustion system minimizes the rate of defective products, making it ideally suited for environments requiring continuous, long-duration production.

3. Cake Baking Production Lines:

In the processing of cake products, the equipment employs a hot-air circulation system to enhance heating uniformity, ensuring consistent surface coloration across all products. The Zero-pressure Proportional Gas-fired Tunnel Furnace is well-suited for the mass production of standardized cake bases. Its temperature control system allows for precise adjustments tailored to specific recipes, thereby guaranteeing the structural integrity of the final product.

4. Frozen Food Factories:

The pre-processing stage of frozen food production often requires a stable baking phase; this equipment is ideal for baking pizza bases and other semi-finished products. The Zero-pressure Proportional Gas-fired Tunnel Furnace offers continuous processing capabilities that seamlessly integrate with the pace of assembly-line operations. Its uniform heating minimizes product deformation, thereby enhancing the effectiveness of the subsequent freezing process.

5. Central Kitchen Processing Centers:

Central kitchens demand high levels of equipment stability and efficiency; this unit is therefore well-suited for the production of a diverse range of food products. The Zero-pressure Proportional Gas-fired Tunnel Furnace is designed for continuous, long-duration operation, effectively meeting the demands of centralized food supply operations. By allowing for flexible adjustments to heat output and temperature zone distribution, the equipment can readily adapt to the specific processing requirements of various products, thereby boosting overall production efficiency.

1. Clean the furnace regularly

It is recommended to clean the furnace thoroughly once a week to remove accumulated grease, residue or other impurities. Use a soft cloth or special cleaning tool to wipe the surface of the aluminum plate, and avoid using corrosive cleaning agents to avoid damaging the material.

2. Check the combustion system

Check the working status of the burner, air-gas valve and proportional motor once a month to ensure the normal operation of each component. If the burner flame is unstable or gas leaks, the machine should be shut down for inspection immediately.

3. Lubricate the conveying system

The conveyor chain and guide rails need to be regularly added with high-temperature lubricating oil. It is recommended to lubricate and maintain once a quarter. When lubricating, be careful not to over-lubricate to avoid oil leakage and contamination of the product.

4. Test the insulation material

Check the integrity of the insulation cotton once a year to observe whether it is damaged or aging. If necessary, replace the new insulation material in time to ensure the insulation performance of the equipment.

5. Calibrate the temperature control system

Calibrate the PID temperature control system once every six months to ensure the accuracy of the temperature sensor and controller. Professional measuring tools should be used during calibration, and the operation should be strictly in accordance with the equipment manual.

6. Operator training

Regularly organize operators to participate in equipment use and maintenance training to help them become familiar with the equipment's operating specifications and daily maintenance points, thereby reducing the risk of human operating errors.

With advanced equipment and skilled personnel, we provide customized design, manufacturing, installation, debugging, and after-sales maintenance of intelligent mechanical equipment.

We deeply understand that every customer has diverse needs. Therefore, we provide professional customized baking solution services, tailoring baking engineering machines according to customers' actual requirements. From the functional configuration to the design of the machine, we fully consider customers' personalized needs to ensure that every machine becomes a proud product for the customer.

KC-SMART provides cutting-edge solutions tailored to the baking industry. Our intelligent mechanical equipment is widely used in the production of diverse baked goods, including bread, mooncakes, cookies, and cakes.

At KC-SMART, we actively participate in industry-leading trade shows to showcase our advanced intelligent mechanical equipment for the global baking industry. These exhibitions provide an excellent platform to connect with clients, discuss their specific needs, and demonstrate our solutions for powder transportation, mixing, fermentation, baking, cooling, and material handling.