Coal yards in the geothermal power generation industry are storage areas for coal used as supplemental fuel in some geothermal power plant operations.

Coal yards are designed to safely store coal, and easily transport it to boilers or other combustion units.

Some common coal yard problems and their solutions are as follows.

1. Problem: Coal Self-Ignition

Coal spontaneous combustion is a phenomenon where coal ignites on its own without an external source of fire. This is caused by the oxidation of coal, which generates heat, and when this heat cannot dissipate quickly enough, the temperature of the coal rises to the ignition point. The impact and losses from coal spontaneous combustion include:

Environmental Impact

• Emission of hazardous gases (carbon monoxide, sulfur dioxide, nitrogen oxides)
• Air pollution and ecosystem damage

Health Impact

• Respiratory diseases (bronchitis, asthma, COPD)
• Gas poisoning (carbon monoxide)

Economic Impact

• Material losses (damage to mines, infrastructure, equipment)
• Production disruptions and firefighting costs

Solution: CoalGuard 575, Coal Spontaneous Combustion Inhibitor

This is a polymer product designed to prevent coal spontaneous combustion by forming a film that coats the surface of the coal, preventing direct contact with air.

Features and Benefits of CoalGuard 575

• Reduces coal oxidation under hot weather conditions
• Minimizes spontaneous combustion issues
• Maintains coal moisture stability from external factors
• Non toxic, non flammable, non corrosive
• Biodegradable

Application Method

• Dilution ratio of 1:40 to 1:250
• 2-10 liters of diluted solution per ton of material, full body treatment

2. Problem: Coal Fire Suppression

Coal fires can have severe environmental, health, and economic impacts. If coal fire suppression is not handled quickly, the losses can be significant.

Solution: FireShield 108, Coal Fire Suppressant

This product functions as a fire suppressant for coal spontaneous combustion. FireShield 108 offers a fast, effective, and safe solution to tackle spontaneous fires in coal stockpiles, protecting the environment and ensuring personnel safety.

Features and Benefits of FireShield 108

• Excellent wetting ability
  Carries more water to wet and cool the coal, extinguishing the fire faster
• Excellent penetration
  Lowers the surface tension of the coal, allowing water to penetrate more easily into the stockpile crevices and quickly extinguish the fire.
• Prolonged re-ignition prevention
  Interrupts the chemical reaction of spontaneous combustion and prevents re-ignition for a longer period.
• Highly economical usage
  Effectively extinguishes fires with a concentration of only 1-3%.
• Safe for users and the environment
  Water-based, safe, easy to use, non-toxic, and biodegradable.

Application Method

• Prepare FireShield 108 with a concentration of 1-3%, using either fresh or saltwater
• Use an applicator to quickly spread the foam and penetrate the coal pile
• Handle fires as early as possible with minimal risk to involved personnel
• Personnel should always face away from the direction of smoke or fire
• Firefighting should always be done in pairs, with one person acting as a supporter

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