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The new technology of PVC made by dry acetylene was jointly developed by Shandong Shouguang Xinlong Electrochemical Group and Beijing Ruisida Chemical Equipment Co., Ltd., and was put into production in September 2006. According to Yang Xiuling, deputy general manager of Shouguang Xinlong Electrochemical Group, who is responsible for demonstration production, the technology uses water to spray on the calcium carbide powder in a mist state to decompose it. The calcium carbide residue is a dry powder with a water content of 4% to 10%. The hydrolysis of calcium carbide The rate is greater than 99%. Water consumption is only one-tenth of the original, low power consumption, pollution and zero emissions. At the same time, the carbide slag produced by dry acetylene technology can be used to make bricks, cement and as a bleaching agent. The operation in the past year shows that, based on the annual production of 100,000 tons of polyvinyl chloride, the new process product yield is 2.5% higher than the original process, and the annual cost savings are nearly ten million yuan. At the end of last year, experts from the China Chlor-Alkali Industry Association conducted a technical appraisal of the technology. The appraisal opinion was: filling the domestic gap, saving energy, saving water, reducing floor space, saving investment, and effectively solving the wet acetylene production The calcium carbide slag pollution problem in the process has good economic and social benefits, which is conducive to the sustainable development of polyvinyl chloride production by the calcium carbide process, and has a very good promotion value in the industry.
It is understood that due to relatively low production costs, the long-term production of polyvinyl chloride (wet method) by calcium carbide method still dominates the PVC industry in China. The calcium carbide method consumes a large amount of water in the production process and generates a large amount of carbide slag, which brings environmental pressure to the company. If foreign technology is introduced, it will cost tens of millions of yuan and even billions of yuan. According to Yang Xiuling, China's independent research and development of dry-process acetylene technology, including technology patent fees and a full set of equipment is only more than 300 million. More importantly, this technology overcomes the disadvantages of wet technology in energy conservation and environmental protection and brings a technological revolution to PVC production. The State Environmental Protection Administration just saw the advanced nature of the technology before listing it in the National Advanced Pollution Prevention and Control Demonstration Technology Directory and the State Environmental Protection Technology Catalogue encouraged by the State.
Dry Acetylene New Technology Included in National Demonstration
The reporter learned from Shandong Shouguang Xinlong Electrochemical Group on the 21st that the demonstration operation in the past year showed that China's first new technology for dry acetylene-based polyvinyl chloride shows outstanding comparative advantages in terms of environmental protection and water saving. Recently, this new technology was listed by the State Environmental Protection Administration as "National Advanced Pollution Prevention and Control Demonstration Technology Catalogue" and "National Encouraged Development of Environmental Protection Technology Catalogue".