Chinese abstract
Coal is China's most main source of energy, and it in our country's energy production and consumption are about 75%. Our coal reserves is rich, during the next thirty a 50 years, coal-based energy structure can't change, coal energy basis position will not change. With the improvement of coal mining mechanization degree and geological conditions change, coal quality have worsen trend.
Coal production and utilization of environment will cause pollution. Coal itself irrefragable and its cause the worsening of the environmental consequences, make coal energy of cleaner production and to utilize become a facing an important and urgent task. Therefore, vigorously develop coal cleaner production and utilization of coal industry, to promote the sustainable development of social economy and further promote the healthy and steady development has important realistic significance to the sustainable development of the human society has very positive role.
Coal cleaning has become a modern production of coal industry indispensable important links and clean coal technology of source technology, is the basis and premise of coal processing. So-called coal cleaning is the use of physical, chemical and physical method, the coal into different quality, specification product process. Coal cleaning can remove impurities, including coal gangue and 50 to 70 per cent of sulphur, enhance the coal quality of products and the increase of coal varieties, reduce ineffective transportation, improve efficiency, saving energy, reduce S02, NOX and soot emissions.
Choose coal as the basis of clean coal technology, mature technology, less investment, operation cost is low, coal processing - CWM, coal gasification, coal liquefaction of premise. State the clean coal technology as a guarantee of national economy sustainable and healthy development of the important means.
This paper firstly coal washing the main theoretical knowledge and process methods are introduced, and combining the current situation of development at home and abroad, and then through combining qixing coal preparation plant actual production conditions, from coal production process based on coal cleaner production status of research and investigation, touch contamination actuality and the producing blowdown key and through qualitative comparison or quantitative analysis of coal washery, to evaluate the status quo of cleaner production, and identify the key point, finally, according to the key point set of cleaner production goals and solutions.
Key word: clean production, of slime water treatment, coal cleaning technology, coal washing water closed-circuit circulation