Hydroxide drying equipment What is hydroxide?
The hydroxide refers to an inorganic compound formed by a metal cation or an ammonium ion and a hydrogen atomic group, and is also called a base, and is a hydroxide of a metal element (including ammonium).
For non-metal hydroxides, it is generally not referred to as hydroxide, except for ammonia monohydrate (also known as ammonium hydroxide), which has a weakly basic aqueous solution.
Hydroxide 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 rotating stirring paddle, the material is dispersed under the action of impact, friction and shearing force, the block material is rapidly pulverized, and it is fully contacted with hot air and 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 material is not dried or the bulk material is subjected to centrifugal force. , fell to the bottom and was crushed and dried.
Hydroxide drying equipment Features:
◎ Organic combination of swirling, fluidizing, spraying and pulverizing 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 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.
Hydroxide 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.
How to choose a flash dryer?
We know that the flash dryer is a high-quality drying equipment. It is a new type of continuous drying equipment that integrates drying, crushing and sieving. We all know that he has many advantages, but we still need to pay attention to some when purchasing. Matters, because the current production of flash dryers is more manufacturers, how to pick good and cheap in many suppliers is not easy. Before buying, we should first understand the basics of the flash dryer and we should consider the use of the flash dryer.
Method / Step:
1. Physical and chemical properties of materials to be dried, material form, water content, water content, water of crystallization, particle size, bulk density, viscosity, heat sensitivity, softening point, phase transition point, thixotropic property, toxicity, corrosiveness, odor, flammability , explosive, electrostatic, gas permeability, agglomeration, easy comminution of crystals or particles, etc. will affect the drying effect
2. The drying characteristics of the material, the drying curve, the critical moisture content and the equilibrium moisture content under the selected drying conditions. Dry production requirements and long-term planning, the impact of material commodity value and drying effect, such as product moisture, pollution, temperature, wear, chalking, crushing, rehydration, etc. on the value of the commodity, the recovery rate of the material Claim.
3. Due to the same drying method, the heat energy consumed by drying and dehydrating one kilogram is basically the same, and the capacity of the heat source (hot air stove, steam radiator, etc.) of the dryer is also certain, so the main technical index of the dryer - drying capacity It is often based on the amount of dewatering per hour (or the amount of dehydration). This indicator is determined under certain conditions, such as wet material type, initial moisture content, final moisture content, hot air temperature, ambient temperature and humidity, and the like. As long as one of the conditions changes, it has an impact on the production capacity of the dryer, and sometimes the impact is still large.
4, wet material type Here refers to the combination of material and moisture. The wet material can be divided into capillary porous materials. The moisture is mainly combined with the capillary force, such as sand, silica, activated carbon, and ceramics. The bonding strength between moisture and materials is small, and drying is easy; colloidal materials, The combination of moisture and material penetration is dominant, such as glue and flour dough. The material generally exhibits high viscosity, and the combined strength of moisture and material is large, and drying is difficult. Capillary porous colloidal materials have the above two types of substances. The nature of such materials as peat, clay, wood, fabric, grain, leather, etc., but the form of moisture combination between such materials is also different, the copper enamel plant determines the difficulty of dehydration under the same conditions. Not the same.
5, hot air temperature or dry medium temperature, is a pipe jacking condition in the dry. The higher the hot air temperature, the more heat energy is contained, and the lower the relative humidity of the hot air, the stronger the ability to absorb water and carry moisture, which is very favorable for drying, and the drying heat efficiency is also high. In many drying equipment, when the other conditions are constant, the dewatering capacity of the dryer is substantially proportional to the change in hot air temperature. When selecting the drying equipment, it is necessary to have sufficient data for the ultimate temperature of the damaged material. When the material permits, try to select the high temperature medium. In particular, many drying methods, especially rapid drying, the temperature of the dried material is much lower than the drying medium temperature. For example, the hot air temperature of the airflow dryer is as high as 250 ° C or higher, and the discharge temperature is generally below 60 ° C. .
2019 05/21