The coal mine ground air compressor room is the core facility in the coal mine production system, and its use runs through many key links of mining operations. The following four dimensions of technical functions, equipment configuration, design principles and safety and environmental protection are described:
1. core functions
- power supply
- provide high-pressure gas source for underground pneumatic tools (such as rock drills, sandblasting machines, drilling machines) to support roadway excavation, coal seam drilling and other operations.
- Drive mine ventilation equipment to ensure underground air quality standards.
- mine ventilation
- the ventilation system is driven by compressed air to deliver ground fresh air to the underground, dilute harmful gases (such as gas), and ensure the safety of miners.
- Auxiliary Job Support
- drainage system: Provide power for the water pump and discharge groundwater in time.
- Lubrication and cooling: Provide lubricating gas source for mining equipment and reduce working temperature.
2. Device Configuration
| Equipment Name | function Description |
|---|
| air Compressor | screw or piston compressor is used to compress the air to 0.7-1.0MPa, and the output flow rate can reach 10-100m & sup3;/min |
| gas tank | store compressed air, balance the peak gas consumption, and the capacity is usually 20%-30% of the compressor discharge. |
| Dry purification system | freeze dryer + multi-stage filter to remove moisture, oil and particulate matter to ensure gas cleanliness up to ISO 8573-1 standard |
| cooling system | air-cooled or water-cooled device, control the exhaust temperature ≤ ambient temperature 15 ℃, and prevent the equipment from overheating |
| control System | integrated PLC control cabinet to realize automatic pressure adjustment, fault alarm and remote monitoring |
3. Design Principles
- site selection requirements
- keep away from dust pollution sources and flammable and explosive materials warehouses, and keep a noise isolation zone ≥ 50 m with the office area.
- It is preferred to choose a high-lying, well-ventilated location to facilitate heat dissipation and equipment transportation.
- Building Code
- the reinforced concrete structure is adopted, the wall surface is installed with silencing cotton + double-layer sound insulation doors and windows, and the indoor noise is ≤ 85dB.
- Set up independent ventilation system, air change times ≥ 6 times per hour, and ensure the temperature of the machine room ≤ 40 ℃.
- Electrical safety
- double-loop power supply + UPS standby power supply is adopted to ensure uninterrupted operation of the compressor unit.
- Equipped with lightning protection grounding system, grounding resistance ≤ 4Ω, to prevent lightning damage to equipment.
4. safety and environmental protection
- safety facilities
- install combustible gas alarm device, linkage explosion-proof exhaust fan, and automatically start ventilation when the gas concentration exceeds the standard.
- Configure fire extinguishers, sandboxes and other fire fighting equipment, and regularly drill emergency evacuation plans.
- energy saving measures
- using waste heat recovery technology, the compressor waste heat is used for mine wellhead insulation or domestic hot water supply.
- Equipped with frequency conversion control system, the compressor power is automatically adjusted according to the gas consumption, and the energy saving efficiency is increased by 30%.
5. operation and maintenance management
- daily inspection check the oil level and pressure parameters in each shift and record the operation log.
- Regular maintenance: Replace the air filter element every 2000 hours, and replace the lubricating oil and oil filter every 4000 hours.
- Emergency Response: Establish a 24-hour duty system with fault response time ≤ 30 minutes.
Coal mine ground air compressor room provides a key guarantee for coal mine safety production through stable and efficient gas supply. Its design and operation and maintenance must strictly follow industry standards to ensure equipment reliability, personnel safety and environmental friendliness.
