Drying equipment in the industrial use is very extensive, many areas are required to use the drying equipment, the same drying equipment in the pharmaceutical industry also has an important role. Today, I will bring eight kinds of drying equipment in the chemical and pharmaceutical industry applications. Analysis on the Application of Eight Kinds of Drying Equipment in Chemical and Pharmaceutical Industry.

(1) belt dryer
The belt dryer consists of several individual unit sections. Each unit section includes a circulating fan, a heating device, a separate or common fresh air pumping system and an exhaust gas exhaust system. Independent control of the operating parameters of the drying medium quantity, temperature, humidity, and exhaust gas recirculation can be achieved, ensuring the reliability of the operation of the belt dryer and the optimization of the operating conditions. With dry machine operation is flexible, wet material feed, drying process in a completely sealed box, the working conditions are better, to avoid the leakage of dust. For the permeability of good sheet, strip, granular material drying, dehydrated vegetables, Chinese Herbal Pieces and other high water content and material temperature is not allowed to high material is particularly appropriate.

(2) roller scraper dryer
The roller scraper dryer is a continuous operation device for drying the liquid phase material or the strip material attached to the outer wall of the cylinder by rotating the cylinder by heat conduction. The liquid to be dried is fed into the trough of the drum dryer from the high-level tank. Driven drum drive under the drive, according to the provisions of the rotation speed. Material by the film device, in the roller wall to form a film. The tube is continuously fed into the heating medium, and the cylinder is heated to heat the moisture of the film to vaporize the moisture of the film. The material required for drying is scraped off by a scraper and conveyed to a storage tank by a screw to be packed. Evaporated to remove the moisture, depending on its nature can be sealed through the cover, the introduction of the appropriate treatment device; generally water vapor, can be directly from the roof of the exhaust pipe into the atmosphere. The machine is mainly used for processing liquid materials, both through the steam, hot water or hot oil heating and drying, but also through the cold water cooling chip. According to the different material properties and process requirements using immersion, spray, grinding and other auxiliary materials feeding method.

(3) hollow blade dryer (leaf dryer)
Hollow paddle dryer, also known as the blade dryer, mainly by the jacket with the W-shaped shell and two hollow shaft and gear transmission components. The shaft is arranged with hollow blades, and the shaft end is provided with a rotary joint through which the heat medium is introduced. The heat required to dry the moisture is transferred to the material by the inner wall of the W-shaped groove with the jacket and the hollow blade wall. Material During the drying process, hollow shaft with hollow blades in the heating of the material while the material is stirred, so that the heating surface of the update. Is a continuous conduction heating dryer. Heating medium is steam, hot water or conducting oil. The heating medium is led into the shell jacket and two hollow blade shafts, and the material is heated and dried by conduction heating, and the structure of the hollow blade shaft of different materials is different. The machine is suitable for processing all kinds of paste paste, granular, powder and other materials with good thermal stability, under special conditions can also be dried and heat-sensitive materials in the process of drying solvent recovery. Commonly used in carbon black, light calcium carbonate, titanium dioxide, barium carbonate, nitrile acid, gypsum, clay, manganese dioxide, nylon and polyester chips, polyethylene, polypropylene (recovery solvent) materials such as drying or cooling.

(4) vacuum rake dryer
Dry material from the rake dryer above the middle of the shell to join in the rotation of the rake teeth stirring, the material contact with the shell wall, the surface constantly updated, the material being dried by steam (or hot water, heat transfer oil ) Indirect heating, but the material moisture vaporization, vaporization of the water pumped away by the vacuum pump in a timely manner. Dry material is heated by the indirect heating of the carrier, so that moisture in the material vaporization, vaporization of water from the vacuum pump in a timely manner.
As the operating vacuum is high, generally in the range of 400 ~ 700mmHg, the dry material surface water vapor pressure is much larger than the evaporator space of the dryer shell water vapor pressure. Which is conducive to be dried inside the material moisture and surface water discharge, is conducive to drying the water molecules of material movement, to achieve the purpose of drying. Vacuum rake dryer for heat-sensitive, easy to oxidize the material at high temperatures or dry easily laminated materials, as well as the drying of the steam to be recycled materials. Typical drying materials are sodium propylene sulfonate, CMC, phthalocyanine blue, dye intermediates, carboxymethyl starch, maltodextrin, anthraquinone sulfonic acid and so on.

(5) double cone rotary vacuum dryer
Biconical rotary vacuum drying machine body, such as olive-like shape, both ends of a cover, the middle set up two axes to support the body. The body has a jacket to heat, drying the body can be rotated, so that the material and the wall is often replaced contact, to overcome the vacuum oven material mainly depends on the heating tube conduction and thermal efficiency of the shortcomings. Rotary vacuum dryer in fine chemicals, medicine and other aspects have been widely used, the viscosity of the process of rotation or strong adhesion of the material does not apply. The equipment is mainly used for concentrating, mixing, drying and low temperature drying materials (such as biochemical products) of powder, granular and fibrous materials in pharmaceutical, chemical and food industries. It is more suitable for oxidation, volatile, heat sensitive Strong irritation, toxic materials and drying of materials that do not allow the destruction of crystals.

(6) Spray Dryer
Spray drying is the most widely used process in the liquid process forming and drying industry. It is most suitable for the production of powdery, granular solid products from solutions, emulsions, suspensions and pastes. Therefore, spray-drying is an ideal process when particle size distribution, residual moisture content, bulk density and particle shape of the finished product must meet precise criteria.

(7) vacuum oven
As the decompression, evaporation of volatile materials contained in the evaporation temperature can be reduced, suitable for a variety of thermal, easily oxidized material drying. This device is usually a cylinder or other vacuum-operated shell, with electric or hot water, heat oil through the heating plate or heating pipe for heating, suitable for small batch batch production.

Oven is a universal drying equipment, a wide range of applications, is a tray-style intermittent drying equipment, used in pharmaceutical, chemical, food. Light industry, heavy industry and other materials and products, heat curing, drying and dehydration. Such as raw materials, crude drugs, Chinese medicine Pieces, extract, powder, granules, granules, water pills, packaging bottles, pigment dyes, dehydrated vegetables, dried fruits, sausages, plastic resin, electrical components.

(8) rotary flash dryer
The material to be dried is fed into the drying chamber through the screw feeder, and is crushed by the stirring paddle at the lower part of the dryer. The pulverized material is fully contacted with the hot air and flows upward under the dual action of the stirring paddle and the air flow divider and is dried and passed through the classifier Screening Granularity and moisture Qualified material Rotate down to dry until qualified.

Features: Drying speed. 1-10 seconds to complete the dryer; material residence time can be adjusted. Can be adjusted between 1-500s, suitable for the drying of heat-sensitive materials; a variety of feeding device for choice, feeding continuous and stable, will not produce bridging phenomenon; drying chamber high circumferential gas velocity, material retention time is short, Sticky wall and heat-sensitive material deterioration; drying chamber equipped with grading ring and swirl pieces, material fineness and final moisture adjustable controllable; high drying strength.