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Spray drying is to disperse the solution into very fine droplets, so that it can quickly form spherical dry powder in the air in a short time (a few seconds). Spray drying not only dries quickly, but also provides powder products with a certain range of particle sizes, which can be cooled and granulated. Our spray drying technology has been identified, and certain technical indicators have met and surpassed the indicators of the century-old Danish Nile (NiRO).
Scope of this technology
Spray drying is widely used in medicine, food, ceramics and forest products, such as tannic acid, tannin extract, gynostemma pentaphyllum, animal gum, synthetic gum, starch, dyes, cosmetics, animal and vegetable proteins, milk powder, spices, natural pigments , Yeast, sugar, enzyme preparation, penicillin, streptomycin, etc. This technology is applied to the flue gas desulfurization of Baima Power Plant in Neijiang City, and the desulfurization rate can reach more than 85%. It has won the first prize of scientific and technological progress of the Ministry of Energy, and was awarded the "National Key Scientific and Technological Tackling Problem" by the State Planning Commission, the National Science and Technology Commission and the Ministry of Finance Certificate of Honor for Major Achievements ".
Technical key and characteristics
——High-speed centrifugal atomization technology: it can run stably and long-term at 1-35,000 rpm. Due to the high speed, the spray distance is shortened, the tower diameter is small, and the cost of basic construction is reduced. 2. The droplets are fine and uniform, ensuring the quality of the product. 3. The tower body is compact, with high mass and heat transfer efficiency.
——High material yield: Due to the unique cyclone separation technology used in this system, when the pressure drop is below 150mm / water column, the material recovery rate can reach 98% (cutting diameter is 20 microns), and low-pressure vertical Venturi can also be used The cyclone scrubber can be combined with a second-stage recovery rate exceeding 99.99%.
——The first domestic "dimensional star valve": this device can make the powder in the drying tower and the lower part of the cyclone smoothly discharge to the outside of the tower, overcoming the valve core jamming and channeling caused by the air leakage during discharge due to the negative pressure in the system Wind and other topics.
——Temperature feedback speed regulation: when feeding high-viscosity materials, a single screw pump is used, and the outlet temperature feedback speed regulation is used to ensure that the final moisture content of the product reaches a constant.
——The novel and unique "Hose Diaphragm Pump": Our institute has also researched and developed the "Hose Diaphragm Pump", which avoids the friction between the pump core and the rubber sleeve of the screw pump. Due to the double isolation, the feed liquid can be made pure, free from pollution, and the pressure and flow are stable.
——Three-fluid airflow fountain fog technology: It is specially suitable for materials with high viscosity and high solid content. This device has passed the provincial appraisal in 1984 and won the first prize.
——The spray drying system has complete specifications and can meet the requirements of different users. The spraying liquid can be processed from 0.5 kg / hour to 10 kg / hour. There are seven specifications for users to choose.
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