In response to China's new industrialization strategy, Rinland Environmental Protection has become the "green" wing of the new energy industry

Under the guidance of the "double carbon" goal, new energy systems represented by photovoltaics, wind energy, and energy storage have become an important direction for China's energy development. The photovoltaic industry is related to the conversion of light energy into electrical energy, such as the production, research and development, integration and investment operation of monocrystalline silicon, polycrystalline silicon solar cells, components and related products.

Among these industries, crystalline silicon modules account for 90% of the market and are the mainstream industry in the photovoltaic industry. Although solar energy is a green energy, the production process of crystalline silicon materials as a mainstream industry produces a large amount of wastewater. Crystalline silicon solar panels use hydrofluoric acid-based etchants and cleaning agents in production processes such as cleaning, texturing, cutting, and etching, resulting in a large amount of fluorine-containing wastewater.

The photovoltaic industry is developing rapidly, and the treatment of fluoride-containing wastewater is naturally urgent. The country and various localities have begun to introduce relevant standards, raising the fluoride emission standard in wastewater from 10.0 mg/L to the limit requirement of 1.0mg/L. Beginning in 2023, many provinces, including Jiangsu, Shandong, Anhui, and Henan, have tightened the concentration limit standards for fluoride in wastewater. Provinces and cities along the Yellow River have also comprehensively tightened fluoride emission standards. Guizhou, Guangdong, Hebei, Jiangxi, Chongqing and other provinces and cities are also gradually moving closer to high standards. This trend is irreversible.

Disadvantages of current fluorine-containing wastewater treatment methods in the traditional photovoltaic industry

At present, the two most widely used fluoride removal technologies in the treatment of fluoride-containing wastewater in the photovoltaic industry are calcium salt precipitation and aluminum salt coagulation. Calcium salt precipitation mainly uses calcium salt and fluoride to form calcium fluoride precipitation to remove pollutants. The method is simple and easy to handle, but the treated water is difficult to meet the standards. The aluminum salt coagulation method is often used to treat lower concentration (<20 mg/L) fluoride-containing wastewater, and the treatment cost for high-concentration fluoride-containing wastewater is high.

Solve the difficulties in treating fluorine-containing wastewater in the photovoltaic industry

Rinland Environmental Technology (Beijing) Corp., Ltd.has always focused on the field of deep defluoridation of fluoride-containing drinking water and fluorine-containing industrial wastewater, and continued to promote technological innovation. From the 11th Five-Year Plan to the 14th Five-Year Plan, it independently developed the third generation of fluoride removal core technology, and has accumulated rich and successful project cases in practice.

Relying on years of accumulated fluoride removal experience, Zhongke Rinland actively helps photovoltaic companies solve the problem of fluorine-containing wastewater treatment by using the technical combination of "high-efficiency fluoride removal integrated equipment + deep fluoride removal agent". This technology combination "occupies less space, operates stably, has low cost and is easy to operate". It effectively controls the form of equipment during the mixing and flocculation process, and uses the turbulent vortex control principle and boundary layer theory to achieve high mixing efficiency and full utilization of chemicals. Since the mixing, flocculation, and sedimentation parts all adopt high-efficiency treatment and separation methods, the overall technology can achieve more accurate control of water quality and stably meet standards compared with traditional treatment processes. At the same time, it also significantly reduces the amount of sludge generated and reduces treatment costs, achieving twice the result with half the effort. Fluoride can be stably reduced to less than 0.8 mg/L, meeting the current most stringent national and local standards of less than 1.0 mg/L.

In accordance with the national new industrialization strategy, promoting multi-faceted transformation such as high-end industrial structure, low-carbon energy consumption, recycling of resources, and clean production processes, building a new engine of green growth, and forging new advantages in green competition are the foundation of China's new industrial ecology. In response to the specific needs and many difficulties faced by photovoltaic, chip semiconductor and other industries in treating fluorine-containing wastewater, Zhongke Rinland has established a complete solution system, while continuing to maintain innovation and actively provide strong support for enterprises to solve the problem of fluorine-containing wastewater treatment.