Increased dispersion waters, increasing the green roof, floor, exterior walls increase photocatalyst coating or with Chi, strengthen supervision cars, improve vehicle tail gas emission standards. The shortcomings of traditional methods of planting trees and grass control: haze days occurred mainly in low relative humidity in winter and spring, when self-purification capacity of the plant is very limited; thermal power plant pollution control: coal-fired power plants, etc. Basically scrubber has been installed, If further improve emission standards, will greatly increase the cost of thermal power, when the costs to lead to a substantial increase in social costs, and the share of thermal power plants PM2.5 pollution in the city is a small part; combustion treatment of crops: Control burning crops will lead to a substantial increase in government costs and difficult to control, to protect the interests of farmers, the government is difficult to formulate restrictive terms, even if developed, it is difficult to implement. The crop wastes (eg straw) processing to achieve subsidies will not last forever. For farmland, burning crops benefits outweigh the disadvantages, even if the pollution and its toxicity is low. Before large-scale integrated agriculture is not production, crop waste disposal is still difficult to solve. For example: the government invested a lot of money to repair marsh pond, but the high labor costs of its maintenance, resulting in a lot of people give up, and the use of liquefied petroleum gas. Industrial emissions of pollution control: relocation and control of industrial pollution, although industrial areas to solve the pollution concentration, one area to another makes more dispersed pollution, atmospheric background concentration value higher. Improved technology will control the sources of pollution, but a short time to improve emission standards will be making many small businesses unbearable, will result in imposition of a regional economic problems. Automotive pollution control: improving the emission standards to be gradual phase-out of old cars, which makes three to five years automotive pollution control is difficult to achieve, and automobile pollution has become a major source of pollution in urban PM2.5. Economic and technical feasibility analysis of technical feasibility analysis of the contamination 200μg/m3 calculations, 500m away from the high ground of space, the total pollutants 1000km2 is 100 tons, which is equivalent to the total pollutants in moderately polluted Beijing, a heavy vehicle to tow all of these pollutants. Saturated humidity at 10 ℃ air contained about 9.4g/m3, even in severe pollution 400μg/m3, the proportion of water vapor and contaminants not more than ten thousandths. Dust Removal safe and reliable, the technology is relatively mature. Existing spray and water treatment technology is more mature, these devices have been widely applied. Automatic control equipment and computer equipment also belongs to mature technology solutions. Spray a large surface after wetting, wetting the surface of a large number of these dust absorption, adsorption of soluble gases and solids; spray characteristics charge of: micron or less, the effect of electrostatic precipitator filtration and adsorption systems, uniform dispersion of charge spray particle concentration can occur when large fog mist demisting when the relative humidity is too saturated; charged mist can efficiently remove fine dust, accelerate the degradation of toxic substances; spray can cool down and clean air in the summer When can humidified air drying, air pollution is more serious; fog, mist particles due to the small diameter, easy to form rain, but in the larger fog mist spray, mist will quickly gather large particles and water droplets landing defogging for air purification; economic feasibility analysis 10% of the area of ??the city dispersed spray equipment to meet increased urban air purifier. Per square kilometer than 500 tons of water per day. When traffic is heavy equipment dispatched at the focus of the contaminated area, lower relative cost, the better. Feasibility Analysis of China's national conditions as the economic level, the environment and health have become increasingly demanding. The desire to spend money on all levels of government is also growing, the construction of urban levels of BT air purification and conditioning systems will help improve performance of; urban air purification system integrated environmental protection, electronics, communications, control, artificial climate, is a comprehensive and strong high-tech industry, is conducive to the government's industrial upgrading and transformation; BT construction of urban air purification system will be in the next five years, China's most popular items. Potential technology and potential technology patents urban governance PM2.5 and patented technology may form the main focus on: monitoring, control two areas, mainly in the following areas: monitoring: the atmosphere associated with PM2.5, tail gas monitoring, and evolution-related PM2.5 SOx, NOx and other pollutants monitoring, migration and evolution of atmospheric pollution data model; Governance: spray system (typical patent 02151992.7, "a spray cooling system Dust"), photocatalyst system, surface Catalysis and architectural systems, air pollution database (monitoring point, evolution and distribution of pollution, governance optimization model), roof systems (rainwater recycling, solar energy, water spray wetting, air purification systems), optimization of pavement materials, road rain and water reuse systems, communications and control systems, integrated pollution devices on streetlights degradation system. Century Environmental Technology Co., Ltd., Sichuan Zhongxing Contact: 18908170349 Ms. Wang, QQ2540290043 Company Address: North Ring Chengdu Jinniu Gulf of California Vanke V to send some 803 companies landline 028 -87682468, Fax 028 -87510231