High Capacity Liquid Asphalt Storage Tank System
Product Description
A liquid asphalt storage tank is a sealed steel tank used for long-term, large-capacity storage of high-temperature liquid asphalt. It is the core equipment for material storage, thermal insulation, and transfer in asphalt mixing plants, modified asphalt production lines, waterproofing membrane manufacturing, and the carbon industry, providing a stable source of asphalt for the entire production system.
Main Classification
By structure
Horizontal asphalt storage tank: Most commonly used, standard for job sites/asphalt mixing plants. Capacity 5–100 tons, movable, fast installation, small footprint.
Vertical asphalt storage tank: Large fixed storage tank, capacity 100–5,000 tons, used for asphalt depots and large mixing plants, high storage capacity.
By heating method (three main types)
Thermal oil circulation heating (most recommended): Thermal oil coils arranged inside the tank with an external thermal oil heater. Uniform heating, no asphalt coking or aging, stable temperature control. Industry mainstream.
Fuel oil/gas direct heating: Fast temperature rise, low cost, suitable for remote job sites. Pay attention to exhaust and explosion protection.
Electric heating: Used for small tanks, clean with no open flame, suitable for waterproofing and small repair projects.
Core structure (three-layer tank + systems)
Inner tank: Q235B carbon steel, thickness 6–10 mm, resistant to high-temperature asphalt corrosion. Equipped with internal thermal oil coils, localized rapid heating zone, and ultra-low level asphalt extraction port, allowing complete drainage of asphalt from tank bottom.
Insulation layer: 100–150 mm high-density rock wool/aluminum silicate, outer layer covered with aluminum sheet cladding. Excellent thermal insulation performance, temperature drop <1°C/h.
Outer shell: Carbon steel protective cladding, weatherproof (rain and sun protection).
Auxiliary systems:
Temperature control system: Automatic temperature control, typical storage temperature 130–160°C.
Asphalt pump + feed/discharge piping: Connects to melter for feeding and to construction equipment for discharging.
Level gauge, pressure gauge, breather valve, manhole, explosion-proof device.
Optional mixing device to prevent localized solidification and stratification.
Key technical features
Localized rapid heat extraction: Only heats the discharge zone instead of the entire tank, energy-saving, does not degrade overall asphalt quality.
Constant temperature storage: Maintains asphalt in a fluid state throughout storage, preventing solidification, carbonization, and degradation.
Closed-loop environmental protection: Equipped with breather valve and fume collection system, reduces asphalt fume emissions.
Continuous asphalt supply: Integrates with asphalt melter to achieve a complete system of solid asphalt melting → liquid asphalt storage → continuous discharge.
Common specifications (weight/capacity)
Small job sites: 5t, 10t, 20t horizontal tanks
Medium mixing plants: 30t, 50t, 80t, 100t horizontal tanks
Large asphalt depots: 200t–2000t vertical tanks
Operating principle
Hot liquid asphalt is fed into the tank from an asphalt melter or unloading system.
The internal coils continuously heat the tank, maintaining the asphalt at a constant temperature in a fluid state.
During production, the asphalt pump draws asphalt from the tank bottom, passing it through a filter and heater before delivering it to the process.
Impurities settle at the tank bottom and are periodically removed through the drain port.
Difference from buffer tank
Liquid asphalt storage tank: Large capacity, long-term storage, overall heating, main material storage.
Asphalt buffer tank: Small capacity, short-term transfer, pressure stabilization and degassing, intermediate link.
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