The Mercury Emission of Flue Gas from Cement Kiln Control Technology Research

摘要

Mercury emissions from cement plants has attracted the attention of the world, the United States and the European Union and other developed countries have already made strictly limitations of mercury emission from cement plants, China has also been developed to limitation of mercury emission from cement plants. Mercury of cement plants comes mainly from coal and raw materials, and mercury from flue gas can be removed by removal equipment, so you can use mercury control technology to remove mercury in flue gas. Depending on the different size and raw materials, of the plants, and mercury emissions under different conditions is not the same, so there is no mature mercury removal technology can be applied directly. 1 Overview Mercury is a toxic heavy metal and non-essential element for the organism. Mercury in the organism can be transformed into methylmercury, producing a strong toxicity, and it will be gradually enriched to high-end along the food chain, and ultimately it will affect human health, and do harm to the body. Mercury released into the atmosphere may be in the range of regional and global atmospheric circulation with long-distance transmission. Cement industry is an important part of our national economy, the actual production of cement for 20 years ranks first in the world. Cement produces a large number of air pollution, as shown in Figure 1. China's cement production continued to grow from 2005 to 2013, it accounts for over 50% of the world, as shown in Figure 2. During the cement production process, in addition to conventional pollutants, it produces special heavy metal contaminants.