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Founded in 1992, Nanjing XinHeDa Machinery Co., Ltd. is a professional manufacturer of mixing equipment. Since its establishment, the company has been focusing on the scientific and technological development of fluid machinery, and growing in practice. The company has 72 employees, including five professors, six senior engineers and fixed assets of more than 42.5 million yuan. Relying on the research and development strength of Hehai University and its own technological innovation ability, the company has been engaged in the research and development of energy-saving new stirring paddles, and has invested a lot of human and material resources in this work. The school fluid machinery laboratory also gave active cooperation and support, and achieved great success in the design of impeller profile and model amplification technology. Nanjing XinHeDa Machinery Co., Ltd. has produced more than 1000 sets of mixing equipment since 1992. The mixing equipment is mainly used in various chemical fields such as sulfuric acid phosphate, compound fertilizer, calcium feeding, non-ferrous smelting, organic and inorganic chemical industry. Most of them are used in the phosphoric acid extraction reaction tank. In view of the special requirements for this process (stirring purposes such as reaction, suspension, crystallization), the company adopts the energy-saving variable cross-section adjustable angle agitator specially researched by the water conservancy model laboratory of Hehai University. In order to improve the phosphorus yield of P2O5, calcium sulfate crystal, which is one of the products after chemical reaction in phosphoric acid extraction reaction tank, is mixed in phosphoric acid. In order to improve the phosphorus yield of P2O5, calcium sulfate crystal is expected to be complete, coarse, uniform and stable, which can increase the filtration capacity and washing rate. In this process, the crystal formation is closely related to the agitation kinetics. For example, if the stirring intensity is too high, the strong local disturbance is unfavorable to the crystal forming; if the stirring intensity is too low, the chemical reaction will be easily affected by precipitation. What kind of mixing intensity is good, which puts forward higher requirements for the blade shape. The variable cross-section agitator blade developed and manufactured by our company can form uniform flow field and circulate in the extraction tank when it works. Due to the unequal inclination angle of each cross-section of the blade, the blade can meet the fluid smoothly when it moves, which fundamentally eliminates the generation of local vortex and flow separation. This kind of agitation has remarkable effect on mixing materials, smoothing streamline, growing long crystal and saving energy consumption. In order to further adapt to the different shapes of extraction tanks, different ore raw materials, different technological processes and production changes of various production plants, the unit designed and manufactured the paddles into a structural form with adjustable installation position. The user can adjust the blade angle properly in the use process to increase or reduce the operation demand of mixing circulation. With the simulation mixing experiment system, the constantly updated fluid technology strength and the increasingly perfect after-sales service system, the company has become a strong and influential professional mixer manufacturer at home and abroad. Our honest quality and technology are always the source of life for the enterprise. The company always adheres to the theme of scientific research and development, user-centered, talent based, management and development promotion, so that the enterprise is stepping into the track of institutionalization, standardization, procedure and scientific marketization. In the face of a better future, the company is still as always to develop high-tech, develop front-end products as the theme, and the majority of users at home and abroad hand in hand to establish a friendly relationship of cooperation, dedicated to the majority of users.

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