The North Star Solar Photovoltaic:

Energy consumption, environmental protection standards related to the majority of enterprises

    To convert solar energy into electrical energy, sound green and environmental protection. In fact, the conversion process are threatening our environment. Not technology can alleviate this fact, but a lot of our country enterprises far enough. Although in the past few years, the development of solar energy photovoltaic industry in the world is immersed in trough, but up to now, many domestic enterprises still did not solve the serious problem of environmental pollution. After spending three or four months time visited investigated more than 10 domestic photovoltaic enterprises, a few days ago, the international environmental organisation Greenpeace released" Chinese Photovoltaic Industry Cleaner Production Research Report" ( later referred to as" report" ) came to the conclusion: the domestic photovoltaic industry clean production situation is not satisfactory.

Cleaner production remains in the slogan and form

   Now, China has become the largest producer of solar photovoltaic equipment, its crop occupies almost half of the world, but on the other hand, the rapid expansion of the upstream industry also photovoltaic in China has brought serious pollution. Taking photovoltaic industry upstream polysilicon links for example, China more than 70polysilicon in the enterprise, only 20reached in 2011the ministry promulgates" polysilicon industry access conditions" requirement, more than 2/ 3 of the polysilicon enterprises in energy consumption and environmental protection are not standard. In addition to the polysilicon links, in the lower reaches of the more than 200PV enterprises, there are only a handful of listed companies issued corporate social responsibility report, disclosure of its energy levels and the "three wastes" ( waste gas, solid waste, liquid waste discharge ). " This exposes China PV enterprises awareness of cleaner production is insufficient, still stays in the slogan and form. The resulting illegal, illegal hidden troubles, such as in a conventional pollution control has many loopholes." Greenpeace climate and energy project director Li Ang said.

Photovoltaic pollution may have triggered the cancer

    The photovoltaic industry pollution, many people's impression of the United States from2008," Washington Post" an article entitled" solar company put the rubbish left China" report, this paper reported the Henan Luoyang in a polysilicon producers emission of silicon tetrachloride caused serious pollution problem. The article says," and the company factory in shiny white tower is in sharp contrast, near the village remains bleak. About 9 months ago, the villagers found their crops on a layer of white powder, and started to wither." Zhejiang Province branch crystal energy pollution event is another typical example. From September 15th last year, Zhejiang Province, Haining City, Huazhen red dawn village villagers, began to denounce the branch crystal energy environmental pollution problem, whole village 300 villagers, unexpectedly 6leukemia,31 patients with cancer, the villagers think this is crystal branch energy caused by pollution. Subsequently, crystal branch energy held a press release, issued a public apology, recognition of fluorine containing solid waste dumps, resulting in heavy rain after discharge was near to river pollution, but the company says pollution and the disease and it doesn't matter. The two pollution accident just domestic photovoltaic industry pollution "the tip of the iceberg". The data shows, the relevant departments of the State Environmental Monitoring18photovoltaic company 2006 ~ 2011record shows, most companies due to environmental standards were ordered rectification or stop. These photovoltaic enterprises without authorization or wastewater discharge, or waste gas treatment is not strict enough, and it is in the environmental protection problems, and now more and more enterprises are still in environmental monitoring to line of sight.

Pollution is not a technical problem

    Since it will cause serious pollution, why should we large-scale development of solar photovoltaic industry? Many people feel quite tangled. Greenpeace released report points out, China PV industry to realize the clean production and no technical bottleneck. Domestic engaged in a solar energy photovoltaic production equipment and technical personnel tell reporter, now outside of high pollution question, is actually not understand modern photovoltaic equipment production technology by. At present about photovoltaic equipment pollution, the most prominent of polysilicon is generated in the production process of silicon tetrachloride is a toxic gas, reacts with the water to generate hydrochloric acid, contact ground soil acidification hardens, cause barren. But in fact, if by hydrogenation apparatus, the silicon tetrachloride hydrogenation reaction, generate trichlorosilane back system for recycling. In addition, polysilicon production process to produce hydrogen (explosive ) and hydrogen chloride ( strong acidic gas ), are available in the system as an intermediate raw material circulation use. While the trichloro hydrogen silicon purification, cannot use the chlorosilane impurities, by adding alkali to form neutral stability, residue, can be used as a building material or filling roadbed, for the production of sewage, can also be in the early treatment and then discharged into the sewage treatment plant.

The enterprise and the government has inescapable responsibility

  The Greenpeace report also pointed out, the enterprise and the government has inescapable responsibility. Some companies will still stay in the end treatment clean production stage, the management cost is high, the effect is not ideal; and the environmental protection departments in the photovoltaic industry development in the process of matching the lack of supervision, pollution control facilities are not in place, the photovoltaic industry environmental problems hidden danger. However, the NDRC Energy Research Institute researcher Jiang Kejun appears, after these years of sustainable management, China's solar PV industry development in the serious pollution problem has been basically halt. Current to China PV industry, how to standardize its development is a pressing matter of the moment. Jiang Kejun thinks, in recent years China 's solar PV industry, is in a high-speed expansion after cooling and transition period. " In the future, as long as the existing scale do fine, do a good job of environmental pollution control, the industry of the future will be able to enter into a benign cycle, will not be a big problem."

    In view of the outside questioned: Europe and the United States developed vigorously develop solar photovoltaic industry, but the upstream pollution industry chain transfer to developing countries such as China. Jiang Kejun thinks, this view does not accord with actual, he said, one aspect of the developed countries in Europe and America, now have their own polysilicon and other upstream equipment production; in addition, the industry in the upstream of the main focus of China and other developing countries is not what they want to do. " These countries want to in their own development, but as a result of manpower cost than the developing countries such as China is much higher, they in the cost competition out of weakness, it is that they can't control." Jiang Kejun said, these years the development of PV industry in China, to a great extent is the use of the comparative advantages in cost.

24 years of photovoltaic power generation are zero carbon emission

   For the solar photovoltaic industry in the future, experts said, the industry still has a better future. In the Greenpeace report, the study compared the photov oltaic power generation and fossil energy in the energy consumption and performance, calculated: photovoltaic energy recovery period of only 1.3years, and its service life is25 years, which means that after about 24years of photovoltaic power generation are zero carbon emission. " Even after taking into account the photovoltaic manufacturing process energy consumption and carbon emissions, photovoltaic power generation carbon emissions is still the fossil energy1/ 10 to1 /20, in energy conservation and emission reduction with there is nothing comparable to this superiority." Li Ang said. On the whole, solar photovoltaic powereneration is still clean and efficient energy sources, we can not because the industry appeared a few problems, then down at one stroke." Chinese Academy of Sciences of the experts