The flash
Dryer is used to mix and crush the bulk wet material and ensure that the particles do not stay too long in the high temperature zone of the drying chamber. Therefore, the stirring leaves and the bottom of the chamber and the wall of the chamber should have a reasonable clearance, and the rotational speed of the stirring should also be reasonably selected. There is a good seal between the agitator shaft and the bottom of the drying chamber. The classifier is a perforated ring, similar to an orifice flowmeter, but with an angle, the size and height of the hole diameter depends on the distribution of product particles. When the height is constant, the smaller the hole diameter, the finer the product particle size, the more the flash drying. The addition of a grading ring in the cylinder is one of the focuses of the third-generation product new technology development developed by Anhai Dano. It is very important to control the particle size of the product and greatly improves the product qualification rate. Rotary flash dryers are used to dry the moisture outside the material. The wet material is separated from the heated air stream through the drying air duct of the flash drying apparatus and drying takes place between seconds. Rotary flash dryers are not used in many industrial fields, including foods, chemicals, minerals, and polymers. The combination of materials is also common, including powders, lumps, granules, flakes, pastes, and gels. In the
Case of slurries, pastes, or viscous materials, backmixing of dry and wet materials is required. The flash dryer drying chamber is equipped with a grading ring and a swirling sheet, and the material fineness and the final moisture are adjustable. (For example, the final moisture of calcium carbonate can be adjusted to ≤0.1%) Compared with other drying methods, the specific gravity of the material can be effectively increased. In the drying chamber, the gas velocity is high in the circumferential direction and the material residence time is short. This effectively prevents sticking of the material and the deterioration of the heat-sensitive material. Due to the gas-solid two-phase rotation. The inertia of solid phase is greater than that of gas phase. The relative velocity between solid and gas phases is large, and the heat transfer between the two phases is enhanced. Therefore, the aircraft production intensity is high. The flash dryer has a wide application range, large production capacity, good product quality, high efficiency and energy saving. Flash dryer anti-corrosion process description: First, the use of ordinary carbon steel electrostatic spraying polyester resin powder coating Its corrosion resistance is completely comparable with stainless steel. Because of its toughness, durability, and good decorative properties, the powder coating has excellent outdoor weather resistance and heat resistance, and the mechanical processing factory has excellent corrosion resistance and chalk resistance, excellent gloss and shade properties. Therefore, electrostatic powder coating is completely suitable for the preservation of the dryer shell. Second, the use of stainless steel cold-rolled plate Flash dryer dryer cover plate is mostly made of cold-rolled stainless steel, and thus cost is high. Why use stainless steel instead of ordinary carbon steel, because the device will be exposed to a variety of corrosive materials and gases in the working state, and stainless steel corrosion resistance is very superior, and therefore made of stainless steel cold-rolled plate. III. Application of electrostatic powder coating in the manufacture of flash dryers Traditional paint coatings are liquids, which contain large amounts of organic solvents such as ester ketones and hydrocarbons, causing a series of troubles for production, storage, transportation and construction. Explosive and unsafe. Due to certain toxicity, it volatilizes into the atmosphere and seriously pollutes the environment. Therefore, paint experts at home and abroad are all devoted to the development of new coatings that use little or no solution. One of the new coatings is powder coating. Phosphating - passivation process In the manufacture of flash dryers, 70% of the parts are carbon steel structures. Due to the long turnover time between processes, a large amount of rust is generated on the surface, and more labor is required to remove rust before painting. Phosphating - passivation technology, LED display is through electrical and electrochemical reactions, through a one-time treatment, can make full of rust steel workpiece, the surface shows the original color of the metal, while generating a dense defense on the metal surface Rust film layer. Can be placed in moist air for more than ten days without rust. Its operation method is simple, it can improve the working environment, reduce labor intensity, and save manpower and material resources. The phosphating-passivation treatment solution contains emulsifiers, molybdates, soluble phosphates, and various acids. This method is not only used in the above-mentioned models, but other similar structures or frames can be used for corrosion protection. deal with.
