Sodium metasilicate is a low molecular crystal obtained by the thermal reaction of common blistering alkali with caustic soda. The products are anhydrous, pentahydrate and nonahydrate. Among them, the nonahydrate exists only in the Chinese market and was in the 1980s. Emergency products with low technical content, which are urgently needed to be developed with sodium silicate, have a melting point of only 42 ° C and can easily become liquid or paste when stored.
Sodium metasilicate drying equipment Working principle:
The hot air tangentially enters the bottom of the dryer and is driven by the agitator to form a powerful rotating wind field. The paste material enters the dryer by the screw feeder. Under the strong action of the high-speed rotary stirring paddle, the material is dispersed by the impact, friction and shearing force, the block material is rapidly pulverized, and it is in full contact with the hot air and is heated. ,dry. The dehydrated dry material rises with the hot gas flow, and the classification ring intercepts the large particles. The small particles are discharged from the center of the ring to the outside of the dryer, and are recovered by the cyclone separator and the dust collector. The dry particles or the bulk material are subjected to centrifugal force to the wall. , fell to the bottom and was crushed and dried.
Sodium metasilicate drying equipment Features:
◎ Organic combination of swirling, fluidizing, spraying and crushing and grading techniques.
◎Compact equipment, small size, high production efficiency, continuous production, realized
◎ "Small equipment, large production".
◎ Large drying strength, low energy consumption and high thermal efficiency.
◎The material has a short residence time and good finished product quality, which can be used for drying heat sensitive materials.
◎ Negative pressure or micro-negative pressure operation, good airtightness, high efficiency and elimination of environmental pollution.
Sodium metasilicate drying equipment
Organic substances: Atrazine (pesticide insecticide), lauric acid barrier, benzoic acid, benzoic acid, bactericidal Dan, sodium oxalate, cellulose acetate, organic pigments, etc.
Dyes: antimony, black iron oxide, indigo pigment, butyric acid, titanium hydroxide, zinc sulfide, various azo dye intermediates.
Inorganic materials: borax, calcium carbonate, hydroxide, copper sulfate, iron oxide, barium carbonate, antimony trioxide, various metal hydroxides, various heavy metal salts, synthetic cryolite, and the like.
Food: soy protein, gelatinized starch, wine trough, wheat sugar, wheat starch, etc.
What are the basic components required for the construction of a flash dryer?
The flash drying system provides basic and auxiliary components such as air heating systems, fans, cyclone/bag filters, twin propellers, rotary valves, mechanical dispersion and cage shredders/free shredders.
The air heating system of the flash dryer includes a steam heater and a hot air generator, and the steam heater, that is, the fin tube heater, uses steam as a heating medium for temperatures up to 175 ° C - 150 ° C; hot air generator That is, for higher temperatures, direct or indirect combustion of a hot air generator using oil or natural gas as a heating medium is ^. The type of generator and the choice of fuel to use depend on the product being dried.
Double impeller coal feeders: These are biaxial paddle mixers that provide varying pitches for varying degrees of capacity and mixing. These hybrid block materials, such as filter cakes and materials, are ideal for mixing free flow into high moisture dry matter.
Mechanical scraper: The mechanical scatterer has the function of increasing the heat transfer effect by accelerating the diffusion of the material into the drying tube, which usually forms part of the drying tube, but the hot gas does not flow through the scatterer.
Rotary valve: These are used as air seals when introducing material into a hot air duct or when using material from a cyclone. The material of the structure will depend on the nature of the product being processed.
Cage Crusher/Free Crusher: This machine is used to smash the pieces of moist material and also dry some, which accelerates the rapid drying of the wet material, because the hot air enters the mill from the middle of its front door and flows into the dryer through its upper part. Wind tunnel.
