The Nan Xin Cement Plant - Suzhou, Jiangsu Province
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By using CP and CE in order to control dust emission and to implement recycling as well as production expansion, the Nan Xin Cement plant in Suzhou, Jiangsu province invested more than 2 million RMBs to convert wet-membrane collection equipment, the low efficiency type, into a bag house with high efficiency. From the process, the local emission standard for dust has been reached, and in addition, it obtained remarkable economic benefits. The dust collected with the membrane had a high moisture content and was difficult for raw material substitution. With the bag house technique, dust can be recycled and reused. The estimated annual amount of dust collected is more than 8,000 tons. If the original material costs about 100 RMB per ton, an annual saving is of 800,000 RMB, with an addition of 300,000 RMB from the deduction in discharge/emission fees, a total benefit of one million RMB is realized. Extra operation cost and labor amounts to about 700,000 RMB, so the net economic benefit is 300,000 BMB and the amortized capital investment for the equipment can be repaid within eight years.
(The above information is taken from a 2004 case study prepared by Mr. Wang Hengchen on the Cement Manufacturing sector and its prospects for implementing Cleaner Production and Circular Economy goals. Please see the full case study Cleaner Production and Circular Economy for Cement Industrial Sector in China.)
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ŠNDRC 2000-2006