Application of electric heating in antifreeze of drainage pipes in coal mines

The coal mine drainage system is crucial to the safe production of coal mines. However, in cold environments, drainage pipes are very easy to freeze, which will seriously affect the drainage function. The emergence of electric heating technology provides an effective solution for the antifreeze of coal mine drainage pipes, and it has many unique application advantages in the coal mine operating environment.

The hazards of freezing of drainage pipes in coal mines and the necessity of electric heating

1. Hazards of freezing

Once the drainage pipes in coal mines are frozen, it will hinder the discharge of water in the mine. The failure to discharge the accumulated water in time may cause the mine to be flooded, damage underground equipment, and threaten the lives of miners. For example, in some cold winters in mining areas, if there are no effective anti-freeze measures, drainage problems may occur within a few hours after the drainage pipes freeze.

2. Necessity of electric heating

Electric heating can continuously provide heat to the drainage pipes to prevent the water in the pipes from freezing. Compared with traditional insulation measures, electric heating has better temperature control performance and can flexibly adjust the temperature according to actual needs to ensure that the drainage pipes are always unobstructed in cold weather and ensure the normal operation of the coal mine drainage system.

Specific application of electric heating in coal mine drainage pipes

1. Selection of heating system

Select a suitable electric heating system according to the diameter, length and ambient temperature of the coal mine drainage pipe. For drainage pipes with larger diameters and longer lengths, it is necessary to select electric heating cables with larger power and higher heating efficiency. For example, for drainage pipes with a diameter of 10-20 cm and a length of more than 100 meters, electric heating cables with a power of 30-50 watts per meter may be selected.

2. Installation layout

The electric heating cable should be evenly wound around the drainage pipe to ensure even heat distribution. The joints and elbows of the pipes should be treated with emphasis, and the winding density of the electric heating cable can be appropriately increased to avoid freezing in these parts due to rapid heat dissipation. At the same time, the electric heating cable should be waterproofed and moisture-proofed to prevent the performance of the electric heating system from being affected by the humid environment underground.

Control and maintenance of electric heating system

1. Temperature control

Use intelligent temperature control system to set appropriate temperature threshold. When the temperature of the drain pipe is lower than the set value, the electric heating starts automatically; when the temperature is higher than the set value, the electric heating stops automatically. This can ensure the antifreeze effect and save energy. For example, setting the temperature threshold at 2-5℃ can effectively prevent water from freezing and avoid unnecessary energy consumption.

2. Daily maintenance

Regularly check the operation of the electric heating system, check whether the electric heating cable is damaged or aged, and whether the wiring is firm. Repair or replace parts in time for any problems found. At the same time, pay attention to check whether the temperature sensor is working properly to ensure the accuracy of temperature control.

Electric heating plays an irreplaceable role in the antifreeze of coal mine drainage pipes. It ensures that the coal mine drainage pipes are unobstructed in cold environments through reasonable selection, correct installation layout, and effective control and maintenance, thereby ensuring the stable operation of the coal mine drainage system and providing strong support for coal mine safety production.