Mine Cooling System Using Ice Slurry Cold Storage Technology for Secondary Side Fluid

Abstract

The invention discloses a mine cooling system using an ice slurry cold storage technology on a secondary side fluid, and relates to a mine cooling system. A primary refrigerating medium is cooled to 10 DEG C below zero by a low-temperature screw ethylene glycol unit 1 of the system; 35% of the ethylene glycol is conveyed to an ice slurry preparation device 3 by a primary refrigerating medium pump; soft and fluffy ice crystals particles are generated on the tube wall through heat exchange of the primary refrigerating medium in the ice slurry preparation device and secondary refrigerating medium containing an additive blocking the growth and antifreeze properties of the ice crystal; the ice crystal particles are scraped off through a reciprocating polyurethane scraping device to form IPF (ice packing factor) 2%-30% ice slurry; the IPF 2%-30% ice slurry is conveyed to a gate way air cooling unit 6 and a mining air cooler 10 by a cold insulation pipeline 5, so as to exchange heat with air flow in the air cooler, thereby the temperature of the air flow is reduced. Through the heat exchange of the cooling water and air flow inside a re-cooling device 9, the temperature of the cooling water is reduced to 32 DEG C, and then the cooling water is returned to the low-temperature screw ethylene glycol unit 1 to complete underground heat removal circulation. The system can be widely applied to controlling high-temperature heat damage to underground mining work surfaces of coal mines and non-coal mines.

Description

technical field [0001] The invention relates to a mine cooling system, in particular to a mine cooling system in which the secondary side fluid adopts ice slurry cold storage technology. Background technique [0002] When the air temperature in the underground environment exceeds 28°C, the incidence of miners increases significantly. When the temperature exceeds 30°C, fatal accidents begin to occur. Fainted at the underground work site. In the Xinwensun Village Mine before 1984 (before the underground cooling system was put into operation), the incidence rate of miners who worked at high-temperature underground operations was 1.83 times higher than that at normal temperature (below 28°C), and the highest was 3.61 times. Article 102 of my country's "Coal Mine Safety Regulations" stipulates that "the air temperature of the mining face of the production mine shall not exceed 26°C, and the air temperature of the electromechanical chamber shall not exceed 30°C; ... the air tempe...

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Problems solved by technology

For example, Sanhejian Mine in Xuzhou, Panyi and Pansan mines of Huainan Mining Group Co., Ltd. during the construction period, all reached 30°C~35°C high temperature heat damage, which affected the progress of the project. Horizontal development and excavation, Fengcheng Jianxin Mine -600m horizontal development and excavation encountered high temperature heat damage at 31 ℃ ~ 35 ℃, Fengfeng Group Company Wutongzhuang Mine encountered high-temperature hot water gushing out at the excavation working face, resulting in wind at the excavation working face The temperature is as high as 34°C, and there are many similar high-temperature heat damages. At present, the high-temperature heat damage control equipment in the deep mining face of mines is very short, which cannot meet the safe and efficient production in deep mines, and restricts the sustainable development of deep mining in mines.

[0005] At present, the control of high-temperature heat hazards in mines mainly adopts increasing ventilation intensity to improve the ambient temperature of the mining face. For those that cannot be solved by ventilation measures, local or centralized artificial cooling measures are generally adopted to implement underground chillers. However, the chillers are large in size and difficult to transport and install underground. Inconvenient; the laying distance of cold water pipelines is long, the investment cost is high, and the energy consumption of operation is large. According to the statistical analysis of large-scale mine cooling systems at home and abroad, the total installed capacity of a large-scale centralized mine cooling system is as high as 2500~4500kW, and the energy consumption of the mine cooling system It accounts for about 15%~20% of the total energy consumption of the mine production system, and the use of ice slurry cooling system as the secondary refrigerant is one of the means to effectively solve the system energy consumption and the excessive volume of underground equipment

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