Gas cylinder heat treatment furnace

High Production Capacity Up to 50 t/h (walking beam type); 250 units/h (chain conveyor type); covers annealing, normalizing, quenching, and tempering Precise Temperature Control Accuracy ±5°C, uniformity ±5°C across the entire length; complies with GB/T 9452 and TSG 07; zoned pulse combustion prevents direct flame impingement on workpieces Superior Insulation Modular box-type structure; high-temperature castables, heavy-duty bricks, and aluminum silicate fiber insulation ensure low casing temperature rise Heat-Resistant Drive System VFD-controlled gear reducer with high-temperature sprockets and chains; stainless steel supports (Φ22mm, 150mm spacing) ensure long-term stability at 600°C Efficient Combustion 150,000 kcal/h high-velocity burners; three-zone pulse control; precise air-fuel ratio adjustment minimizes scale formation Fully Automated Control Siemens PLC with 15-inch touchscreen; DCS integration; data storage and traceability; manual backup mode available for PLC anomalies Waste Heat Recovery & Smart Line Flue gas waste heat preheats combustion air; compatible with quenching tanks, in-line hardness testing, and data uploading to meet smart factory requirements Green & Energy-Efficient Pulse combustion saves 10–15% energy; waste heat utilization; supports natural gas, electric, or coal gas heating; no flue gas leakage; ISO14000 compliant

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Chain Conveyor Annealing Furnace for LPG Cylinder Stress Relieving Heat Treatment

The Chain-Conveyor Annealing Furnace (Model DB-YTH-A and similar series) is a professional continuous heat treatment furnace specially developed for LPG cylinder production lines. It is primarily applied for stress relieving and normalizing heat treatment of welded gas cylinders, eliminating welding residual stress, improving material ductility and structural stability, and ensuring the safety and durability of finished gas cylinders. This industrial annealing furnace supports multiple heating sources including LPG, natural gas, and fuel oil, offering flexible fuel adaptation to meet different factory energy configuration and production conditions. With fully automatic ignition, intelligent constant temperature control, and optional paper and paperless temperature data recording functions, the equipment realizes standardized, traceable, and unmanned heat treatment production, which is an essential core equipment for formal LPG cylinder manufacturing factories.

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Different from batch-type heat treatment furnaces, our continuous chain conveyor annealing furnace adopts a three-stage segmented temperature control design, including preheating zone, constant temperature heating zone, and slow cooling zone. The scientific zoning process effectively avoids cylinder deformation, cracking and performance instability caused by rapid temperature change during heat treatment. The whole production process runs continuously and stably, with an hourly output reaching 180 to 250 LPG cylinders, perfectly matching medium and large-scale automated cylinder production lines. Targeted at 10–15 kg conventional welded LPG cylinders, this furnace realizes precise and consistent heat treatment within a process temperature range of 650°C to 720°C, with temperature control accuracy controlled within ±5°C, ensuring uniform heating effect for each workpiece and stable product quality.

In terms of heating and energy-saving configuration, the natural gas-fired version (8500 kcal/Nm³ calorific value) is equipped with 6 sets of high-speed burners with a single heat load of 150,000 kcal/h, adopting three-zone pulse intelligent combustion control technology. The overall thermal load of the equipment is about 743,750 kcal/h, with extremely low single-cylinder energy consumption, effectively reducing production costs. The fuel consumption per LPG cylinder is controlled within ≤0.30 Nm³, which has significant energy-saving and environmental protection advantages compared with traditional annealing furnaces. The furnace body adopts modular combined design, with single-section furnace module dimensions of 2500 × 1250 × 1450 mm and an inner opening of 650 mm. The furnace length and burner quantity can be customized according to customers’ daily production capacity requirements, realizing personalized configuration from small-batch to high-yield production.

For long-term continuous industrial operation, the equipment is equipped with a high-stability transmission drive system, composed of variable-frequency cycloidal pin-wheel reducer, high-temperature resistant chain and sprocket (600°C high-temperature resistance rating), and Φ22 stainless steel support components. The optimized drive structure ensures stable conveying, low noise and long service life in high-temperature working environments, avoiding jitter, stalling and workpiece deviation during cylinder conveying. In terms of intelligent control, the whole furnace adopts Siemens PLC + HMI touchscreen integrated control system, with independent backup temperature controllers reserved. It supports automatic temperature adjustment, real-time data monitoring, operation parameter recording and manual emergency switching, making the operation process simple, intuitive and highly intelligent.

Industrial heat treatment equipment prioritizes operational safety, and this LPG cylinder annealing furnace is equipped with complete safety protection systems. It features a power-loss automatic quick-shutoff valve for gas pipelines, branch end gas venting and purging devices, and over-temperature automatic alarm and protection functions. These multi-layer safety mechanisms effectively prevent gas leakage, over-temperature failure and equipment abnormalities, ensuring safe and compliant long-term operation of the production line. Widely applicable for standardized heat treatment of welded LPG cylinders, this continuous chain annealing furnace features high automation, high precision, high efficiency and low energy consumption, and has become the preferred continuous heat treatment equipment for Gas Cylinder Manufacturing enterprises worldwide.

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Full Technical Specifications of LPG Cylinder Chain Conveyor Annealing Furnace

Parameter Name	Technical Specifications
Applicable Workpieces	10–15 kg LPG cylinders, welded gas cylinders
Design Output	180–250 cylinders/hour (maximum)
Process Temperature	650–720°C (stable control)
Fuel Type	Natural gas (8,500 kcal/Nm³), LPG, fuel oil optional
Thermal Load	Approx. 743,750 kcal/h
Burner Configuration	6 × 150,000 kcal/h high-speed burners; three-zone pulse control
Energy Consumption per Cylinder	≤ 0.30 Nm³/cylinder
Furnace Module Dimensions	2,500 × 1,250 × 1,450 mm/section; inner opening 650 mm
Drive System	Variable-frequency cycloidal pin-wheel reducer + high-temperature resistant chain/sprocket (600°C) + Φ22 stainless steel supports
Temperature Control Zones	Preheating zone, heating zone, cooling zone (three zones)
Temperature Control Precision	≤ ±5°C
Safety Features	Power-loss gas line quick-shutoff valve, branch-end vent/purge, over-temperature alarm
Control Method	Siemens PLC + HMI touchscreen + independent temperature controller for manual backup