Polysilicon industry "suspended life" high energy consumption – polysi
Polysilicon is the world's major solar cell production of raw materials, while China has become the world's largest solar cell producer, but a long time, polysilicon rely heavily on imports from abroad at high prices, the domestic solar cell manufacturers to make only modest processing fee .
With the recent LDK, Sunbeam, and other enterprise in Sichuan to introduce foreign technology, have launched polysilicon project, self-sufficiency rate of China's polysilicon materials have been improved. However, because of technology and process control is not yet in place, China's polysilicon production costs of high energy consumption and, as the development of China's solar photovoltaic industry in a "Mishap", seems to gradually stronger at any time the Chinese polysilicon industry face "destruction" of the dangerous.
Single factory in Nanchang power consumption is equivalent to 1 / 4
Polysilicon in the current domestic production enterprises, come from behind LDK LDK PV Silicon Technology Co., the investment in polysilicon production called "generous", from the information already in the public view, the design capacity of 15,000 tons is the largest single-plant capacity.
This massive project is located in Xinyu City, Jiangxi Province Development Zone, Jinan international photovoltaic science and technology base covers an area of 1,162,000 square meters, annual output of 3,000 tons by the five electronic grade polycrystalline silicon production line formed by the current international epidemic " modified Siemens process "production of polysilicon materials. Project began in September 2007 the construction began pilot production in late 2009.
Polysilicon production of high energy consumption, which is the largest power consumption. According to Jiangxi Provincial Environmental Protection Bureau of the annual output of 15,000 tons of polysilicon Zevi project approval, the "After the project, the annual consumption of about 209,000 tons of diesel, two months of 3.2 billion kwh in electricity," consumption is equivalent to the one factory in Nanchang City consumption of 1 / 4; not consider the living power plant, the production of the comprehensive energy consumption per kilogram of polysilicon to 213 kwh.
Giant energy like this, a number of SMEs in the production of polysilicon on the higher energy consumption. Shijiazhuang East out of Silicon Technology Co., Ltd. was put into operation in December last year, a polysilicon business, annual output 200 tons. According to Office of Renzhang Xin said the company, investors, a leather company, mainly to see the industry make money, they bought a business from Luoyang modified Siemens process technology, started in July last year, day and night to catch the progress of less than half a year into production. Presently, the 18 tons of polysilicon per month, power consumption 3.5 million yuan to 0.5 yuan per kilowatt, the monthly power consumption 7 million kwh, the energy consumption of polysilicon production per kg to 389 kwh. All energy recovery two to three years
Such a high energy consumption, mean that the development of this industry should be limited to even prohibit development? In fact, the same energy-intensive industries, and China's steel, electrolytic aluminum and the two industries, the production of polysilicon consumption per unit output value is lower than the steel and aluminum.
CPPCC National Committee member, Nanchang University, Zhou Long, Dean of solar PV has specialized measurements are done, even though the energy consumption per ton polysilicon than steel and aluminum, but much higher than the price per ton polysilicon steel and aluminum, even if the price of polysilicon from a peak of 400 U.S. dollars per kilogram, about 70 U.S. dollars fell to the current level of energy consumption per unit output value of polysilicon still lower than the steel and aluminum.
From the production of polysilicon to the solar PV power generation, power consumption of the whole process, according to Suntech Power Control Co., Ltd., and Professor Zhou Lang's calculations, China's medium-light conditions in the area, install a 1 MW solar photovoltaic power generation systems, annual power output of 120 million kilowatt hours; and 1 watt polycrystalline silicon solar cells installed in accordance with the integrated power system production 3 kwh, a 1-megawatt solar photovoltaic power generation system production and installation of electricity 3000000 kilowatt-hour, only 2.5 years can balance their own power consumption recovery. Since each level of the difference in energy companies, domestic polysilicon solar photovoltaic system installed on the average production of energy recovery period between two to three years. With lower energy levels,
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