China ventilation system underground mine | hstarschiller.com
2020-10-15
1 Project Overview Ventilation system underground mine project is located in Yantai City, Shandong Province. It is a gold mining project for China National Gold Group Co., Ltd. The mine depth is 1500 meters. The temperature of the surrounding rock at the working face is expected to reach 43°C when the shaft reaches the bottom, and the temperature of the working face is required to be maintained at 25-28°C. 2. Ventilation requirements for underground mines Project Category Working space shaft of a well net diameter Ventilation parameters Air volume Number of operations Auxiliary shaft 50 meters 8.2 meter 8 times/h 21000 m3/h 8~10 people 3 Underground mine ventilation systems-- project design focus (1) Heavy load, high temperature, high humidity, (2) Poor environment, dust flying around the mine; (3) Long mine roadway, high system pressure, large cooling loss; (4) Fresh air circulation, large temperature difference; (5) The working conditions of the mining level change greatly in each period; (6) The wind speed of the mining face is difficult to control, and the wind speed is too low, and the phenomenon of harmful and toxic gas stratification is easy to occur. If the wind speed is too high, it is easy to cause dust flying and cause secondary pollution. 4 scheme design The design principle considers the customer's investment cost, delivery time, cost performance, safety and stability. The system is supplied with a complete set of equipment. The refrigeration section, the surface cooling section, and the air supply section are made into a skid model in the factory. It can be used after the on-site positioning, which greatly shortens the delivery time, reduces on-site installation costs, and reduces investment costs. 5. Project configuration Device name Cooling capacity Cooling power Air volume Supply air dynamic pressure Remarks Special refrigeration skid for mine 600kw 165kw 21000m3/h 7500pa Full fresh air 6. Program advantages (1) The whole set of equipment is produced and installed in the factory, shortening the delivery time and installation cycle; (2) The equipment is debugged in the factory to ensure reliable operation of the equipment ; (3) The integrated equipment can reduce the initial investment cost (civil construction and installation costs) ); (4) The equipment is cost-effective and has a high utilization rate. After the project is completed, it can be used for other projects; (5) The three-level meter cools down and the air outlet temperature is lower; (6) The system is designed with double vents, adopted in transition seasons and winter Fresh air is supplied to reduce operating costs. 7. Advantages of ventilation system in mining A. High efficiency and energy saving, matching the efficient flooded type heat exchanger produced by H.Stars Group. The chiller COP is as high as: 3.3 B. Reliable operation, adopting Hanbell high-efficiency compressor, high compression ratio, high energy efficiency, stable performance, multi-level energy adjus...
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