JIANG Long;

• 1:North China Electric Power Research Institute Co.
• 2:Ltd.

Abstract：

Coal is the main energy source of electric power in China.600 million tons of fly ash is produced in hte coal-fired power plant of China produces every year,accounting for half of the world's total output of fly ash.The comprehensive utilization rate of fly ash in China is only 70%.In order to fully understand the comprehensive utilization of fly ash in China and improve the comprehensive utilization of fly ash in China,the main utilization situation,relevant standards,relevant laws and policies,and main utilization ways of fly ash at home and abroad were introduced.By comparing the utilization status at home and abroad,the rationalization suggestions of comprehensive utilization of fly ash in China in the future were put forward from three aspects: utilization ways,standard formulation,laws and regulations.The comprehensive utilization rate of fly ash in China is the same as the world average level,but there are some problems in the comprehensive utilization of fly ash in China due to the large output,uneven distribution and existing national energy policies,such as shrinking demand for traditional building materials,seasonal effects,lack of guidance and no compulsory use of policies,imperfect standard system,low proportion of high value-added utilization,etc.Fly ash is mainly used in building materials industry in China. Compared with other developed countries,its application rate in road and mine backfilling is relatively low.Due to the wide distribution of coal-fired power plants and the demand reduction of building materials industry in the western region of China,the comprehensive utilization of fly ash is far lower than the national water level.The index range and limit value of China's standard on fly ash are relatively loose than those of foreign countries,and most of the fields involved are traditional building materials and infrastructure construction,which cannot guide the application of fly ash in other fields well.Most of the existing relevant policies are to encourage the use of fly ash,which is lack of mandatory,and the content of policies cannot effectively improve the subjective initiative of the ash production enterprises.In order to better promote the comprehensive utilization of fly ash in China,we should start from the following aspects in the future combined with own national conditions and compared with the current situation of developed countries: increase the application of fly ash in construction,filling,agriculture,environmental protection and high value-added utilization; promote the application of fly ash in landfill and agriculture in the western region of China; improve the standards of various utilization ways,which should reflect our own particularity of our country in the standard formulation and give priority to the formulation of local standards; the current utilization of fly ash in China depends too much on the policy,so the policy content should guide the ash production enterprises in detail,so as to improve the subjective initiative of ash treatment of ash producing enterprises; increase the policy of compulsory utilization of fly ash; improve the transparency of solid waste utilization information,and strengthen the social supervision of comprehensive utilization of fly ash.

Key Words： coal-fired power plant;fly ash;comprehensive utilization;standard system

Abstract:

Keywords:

Foundation: 国家电网华北电科院自有基金资助项目(KJJ2019040)

Authors: JIANG Long;

DOI: 10.13226/j.issn.1006-6772.F19062501

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