英语作文 怎么解决大气污染问题

英语作文 怎么解决大气污染问题

(1) the current low efficiency due to the burning device, make a lot of energy consumption in the form of heat, and thermal pollution. According to the statistics, civil burning device thermal efficiency is about 10% one 40%, industrial boiler is about 20% to 70%, a coal-fired power plant energy efficiency is about 40%, nuclear power stations is about 33%. Heat energy effective utilization rate of average only about 30% of our country. If the heat energy utilization ratio increased by 10%, means that 15% of the thermal pollution under control. Increase the thermal efficiency to more than 40% in China (the equivalent of industrial developed country level) is possible. This can greatly reduce thermal pollution. (2) the use of waste heat may also reduce heat pollution. For example, the factory waste steam through to take a bath for heat exchanger, or temperature waste heat used to heat needs raw materials; Recycling the waste heat, save energy and prevent the heat pollution environment. (3) the use of cooling air cooling to reduce thermal pollution. Many enterprises of hot steam, heat directly discharge makes pollution. If use the cooling tower or cooling pool containing hot exhaust cooling first, and then discharge, is an easy way to solve the thermal pollution. The cooling tower, which has two kinds of dry and wet towers. Dry tower is to reach the purpose of cooling by heat conduction and convection. Wet can use natural ventilation cooling tower, also can use the method of mechanical ventilation to accelerate cooling. The cooling tower and cooling has been widely used in power station, metallurgy factories and mines.