Treatment method and recycling system for industrial wastewater of polycrystalline silicon batteries
A waste water treatment system and technology of polycrystalline silicon cells, which are applied in the fields of energy waste water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. The effect of protecting the environment, saving water resources and reducing treatment costs
Inactive Publication Date: 2014-09-10
SUZHOU SUJING ENVIRONMENTAL ENG
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Problems solved by technology
However, as an emerging industry that produces clean energy, the production process of polysilicon batteries is actually not clean, and the wastewater discharged from the production of polysilicon batteries contains nitrogen, phosphorus, and fluorine, which will cause serious environmental pollution and ecological damage.
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[0025] The preferred embodiment of the present invention will be described in detail below in conjunction with accompanying drawing:
[0026] According to the water quality characteristics of wastewater produced by different processes, nitrogen-containing waste gas washing water, nitrogen-containing concentrated liquid tank drainage and other concentrated nitrogen wastewater are introduced into the concentrated nitrogen wastewater regulating tank 1, and phosphorus-containing wastewater, nitrogen-containing acid tank cleaning water and other dilute nitrogen wastewater are introduced. The dilute nitrogen waste water is collected separately in the regulating pool 7 .
[0027] Such as figure 1 As shown, the concentrated nitrogen wastewater is lifted to the reaction tank 2 through the pump, and NaOH is added for neutralization reaction, and fully stirred, the pH is adjusted to 6.5~7.5, and the flocculant cationic polyacrylamide PAM is added to produce flocculent solids, and then ad...
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Abstract
The invention relates to a treatment method for industrial wastewater of polycrystalline silicon batteries. The treatment method comprises the following steps: different-source treatment, precipitation treatment, triple effect evaporation treatment, reprecipitation treatment, filtration treatment and reverse osmosis treatment. According to the invention, wastewater with concentrated nitrogen, diluted nitrogen, and phosphorus is collected respectively; through the adoption of different treatment methods, the efficiency of denitrogenation and dephosphorization is improved, and the treatment cost is lowered; on the other hand, the industrial wastewater of the polycrystalline silicon batteries are recycled after being subjected to treatments of filtration and reverse osmosis, so that water resources are saved, and the environmental protection is facilitated.
Description
technical field [0001] The invention relates to a wastewater treatment method, in particular to a treatment method for polycrystalline silicon cell production wastewater and a recycling system thereof. Background technique [0002] Under the influence of the global energy crisis, the development of the renewable energy industry has attracted more and more attention from the governments of various countries. Utilizing the inexhaustible clean energy endowed by nature, such as solar energy, wind energy, tidal energy, etc., can not only solve the problem of energy shortage in the future, but also effectively protect the environment. Driven by relevant policies, regulations, and technology, my country's photovoltaic industry has developed rapidly. However, as an emerging industry that produces clean energy, the production process of polysilicon cells is actually not clean, and the wastewater discharged from polysilicon cells contains nitrogen, phosphorus, and fluorine, which wil...
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IPC IPC(8): C02F9/10C02F9/04
CPCY02W10/33Y02W10/37
Inventor 陈茂林钱震梅益军孙华谢贯虹
Owner SUZHOU SUJING ENVIRONMENTAL ENG