We provide solutions related to crystallization operations based on our extensive track record with independently developed DP-type crystallizers and crystal Oslo-type crystallizers.
**Principle** This is a crystallization device that employs a unique DP (Double Propeller) blade with counter-rotating inner and outer blades installed inside and outside the draft tube. This integrated blade (double propeller) simultaneously creates an upward flow (inside) and a downward flow (outside) in the draft tube, achieving an ideal mixing state in industrial crystallization characterized by "large circulation volume at low rotational speed." **Features** Large Circulation Volume A good mixing state is formed within the device, allowing for a uniform operating supersaturation, which results in the production of high-quality crystals. Additionally, since local supersaturation is less likely to occur, it is possible to suppress the generation of microcrystals and scaling. Sharp Particle Size Distribution Due to the low rotational speed, there is a high suppression effect on nucleation. Furthermore, by adjusting the rotational speed of the double propeller, the circulation volume within the tank can be changed arbitrarily, allowing for adjustment to the desired operating supersaturation. This enables the production of crystals with a sharp particle size distribution, ranging from large to small diameters. High Reliability in Scale-Up Since the operating supersaturation is used as the scale-up factor, reliable and easy scale-up is ensured.
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basic information
Corresponds to crystallization due to evaporation and cooling. Heat exchange can be selected from external heat exchangers, jackets, elements, etc. A scraping mechanism can be installed on the jacket surface.
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Inorganic compounds: Ammonium sulfate, nickel sulfate, sodium persulfate, alum, potassium chloride, barium chloride, sodium nitrate, silver nitrate, sodium carbonate, sodium bicarbonate, potassium carbonate, sodium phosphate, sodium hypophosphite, boric acid, and many others. Organic compounds: Bisphenol A (BPA), caprolactam, acrylamide, hydroquinone, adipic acid, ammonium adipate, fumaric acid, trehalose, aspartame, amino acids, and many others.
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Company information
Tsukishima Kikai Co., Ltd. has been providing industrial machinery manufacturing and plant engineering since its establishment in 1905. In April 2023, it was reorganized as a business company under Tsukishima Holdings Co., Ltd. due to a group restructuring. <Tsukishima Holdings Co., Ltd. Consolidated Information> Securities Code: 6332, Listed on the Tokyo Stock Exchange Prime Market Founded: August 1905 Capital: 6.6 billion yen Number of Employees: 3,575 (as of March 31, 2025) 【Unit Operation Equipment】 - We have specialists well-versed in core technologies centered on crystallization, filtration, drying, weighing, and mixing, and we offer a rich lineup of products. - By manufacturing key and large equipment in our own factory, we provide high-quality machinery. - Our R&D center holds numerous test machines, allowing for tests that combine multiple operations. 【Process Engineering】 - We have numerous EPC achievements, primarily in chemical, food, and battery manufacturing plants, both domestically and internationally. - Through collaboration with overseas group company bases, we provide extensive support to our customers. - Leveraging our core technology experience and knowledge, we offer optimal process proposals that combine equipment from other companies as well.