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The green energy concept of new energy has made the photovoltaic industry rise rapidly. Polycrystalline silicon, as a raw material for photovoltaics, has no price at all. For a time, many Chinese companies have heard the news and poured into the development army, hoping to realize the myth of the phoenix in the crazy competition of silicon raw materials.
However, high pollution has smeared a black one for these originally green companies. In the beginning of April, "Washington Post" left the toxic substances to China in the Washington Post. Not only has China’s overseas listed PV companies suffered major losses, but it has also led people to question the hidden essence behind the high-profile environmental protection banner in China’s PV industry.
The silicon in Luoyang is the center of this storm. As a high-tech enterprise with high hopes, it was disclosed to dump the industrial by-product silicon tetrachloride at random, which seriously polluted local villages, farmland, rivers and air. The party, Luoyang Zhongsi, was aggrieved. They took out a sales contract, claiming that the silicon tetrachloride emitted was properly disposed of, and more than 80% of it was sold to a downstream plant that needs silicon tetrachloride. At the same time as the two sides insisted on each other, Shi Jundao, a former researcher of photovoltaic technology at the Chinese Academy of Sciences, had an embarrassing fact that recycling technology was of course under study, but these technologies are not yet mature.
But even if it can be recycled technically, the domestic market cannot absorb and digest such rapidly increasing silicon tetrachloride. It is only theoretically possible to fully reuse it. Professor Wang Zhanguo, an authoritative expert in polysilicon, a member of the Chinese Academy of Sciences, is concerned about the possible environmental pollution caused by a large number of polysilicon projects in China. He believes that the existing technology cannot completely solve the problem of recycling by-products.
The "Washington Post" report also pointed out that the investment in waste recycling requires a lot of capital and time costs, not to mention that the recovery temperature of more than 1,800 degrees Fahrenheit requires huge energy consumption, without installing pollution treatment technology, Chinese companies can save According to this, the Western media speculates that the root of pollution lies in the old problem of Chinese-style development: that is, the protection of the environment is given to the pursuit of interest.
The high-consumption and high-pollution attacks issued by the West erased the glory of China's photovoltaic powers. Professor Cui Rongqiang of Shanghai Jiaotong University retorted that it is a good thing to pay attention to photovoltaic pollution, but the international community should not only attack China's photovoltaic industry, if it is out Concerned about environmental protection, it is time to help Chinese companies solve problems and open up technology.
At present, the core technology for silicon tetrachloride treatment is still in the hands of 10 factories of 7 companies in 3 countries including the United States, Japan and Germany. However, for the reasons of intellectual property protection and strategic industries of polysilicon raw materials, they China has blocked this technology.
Regardless of the truth about pollution, the problem of blind development and repeated construction in China is enough to lead the way that irrational behavior without technical support will make PV and green gradually drift away.
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