Gypsum Rotary Drum Dryer Features:
The gypsum fixed-speed and quantitative feeder solves the problems of feed and dryer homogeneity, fixed the problem of intermittent feeding, material blocking, and large instantaneous amount of materials. It is a prerequisite for improving the evaporation intensity.
1，Uniquely design of buffer silo and feeding mechanism overcame the intermittent feeding and flickering problems caused by uneven feeding;
2，In the front end of the dryer,we add a large tilt angle non-powered screw propeller, not only uniformly send material into the drying section of the feed gypsum, but also to further cut large pieces of plaster to disperse;
3，Optimizing the internal structure of the dryer maximized the heat exchange area between the material and the hot air is the basis for improving the evaporation intensity.
4，Continuously optimize the internal structure of the drum and the design of the lifting plate. The final shape is the unique drum internal lift plate structure and the mixing zone layout with different functions. The drum full section "material curtain" has no dead corner, no gaps, and maximum Limit the increase of the area of heat exchange between the gypsum and the hot air, so that the moisture in the gypsum will rapidly increase in temperature, vaporize and evaporate, and will be taken away by hot air;
5，Patented layered rotary drum dryer. According to the law of different size of particles in inside of the roller the speed of heating is way different, set up a multi-component drying device, put small size, control of small particles of material due to excessive drying and chalking, large particles of heat inside and outside the material is not uniform dryness, we need to ensure dry uniformity.
6，The hot air furnace is rationally selected to optimize its internal structural design and masonry quality, reduce the air leakage rate, reduce the oxygen content in the hot air to less than 5%, and the temperature of any process requiring 700-1100°C can be arbitrarily controlled and used as a dryer. Providing a homogeneous and stable heat source is a reliable guarantee for the high-strength operation of the gypsum dryer.
7，The measurement and control technology system adopts a computer operation platform and frequency conversion PLC control technology, online interlocking control of temperature, pressure, oxygen concentration, device speed and other process parameters, to achieve automatic detection and control of the entire system, with centralized, on-site switching function, guarantee The system operates with maximum output, optimal quality, most energy-saving mode, and safe explosion-proof operation.
8，Optimize the configuration of gravity settlement + cyclone dust collector + wet / bag three dust collector, dust concentration <30-50mg/Nm3, to ensure that the exhaust emissions standards.
9，The first modular design, manufacturing, transportation, installation, service concept and assembly test platform, to optimize the design and manufacturing, more convenient transportation and installation services to return customers, to ensure maximum customer benefits.
10，Solve the problem that the water vapor returns to the material after the system temperature decreases during the same direction movement caused by the dehumidification of the conventional dryer, and increase the drying efficiency to achieve the purpose of deep dewatering.
11，The dryer adopts the double sealing mode of fish scales or mazes and expandable graphite packing mechanical seals to ensure that the dryer system is closed and oxygen-tight and safe to operate.
Gypsum is a mineral whose main chemical component is calcium sulphate, mainly from ancient salt lakes or sediments of lagoons. Natural dihydrate gypsum (CaSO4·2H2O) is also called raw gypsum. After calcination and grinding, β-type hemihydrate gypsum (CaSO4·1/2H2O), that is, building gypsum, also known as plaster and plaster. If the calcination temperature is 190 °C, the model gypsum can be obtained, and its fineness and whiteness are higher than that of the building gypsum. If the gypsum is calcined at 400-500 °C or higher, the floor gypsum will be solidified and hardened, but the strength, wear resistance and water resistance after hardening are better than ordinary building gypsum.
The gypsum itself is relatively viscous and the wet gypsum will be transported by the roller conveyor into the feed hopper during the drying process. The feed hopper is directly connected to the drying drum, and the wet plaster will enter the drying drum from the feeding hopper and start to contact with the hot air flow inside the drying drum to start the entire gypsum drying process. The entire gypsum drying process can be divided into three major blocks. The first is that the wet gypsum is in contact with the hot air flow inside the drying drum, and the moisture in the gypsum is evaporated by the temperature difference between the hot air flow and the wet gypsum; the copy board provided on the inner wall of the second drying drum The copy board can continuously pick up the gypsum, not only can move the plaster, but also in the process of copying and sprinkling the gypsum in the copy board, the gypsum can fully contact with the hot air flow, thereby being more rapid and sufficient. It is a heat exchange between the hot air and the gypsum; the inner wall of the third drum is provided with a green cleaning device, which cleans the agglomerates generated during the drying process and the materials adhered to the wall to prevent clogging. .
The working principle of Gypsum Rotary Dryer as following: After entering the drying drum, the wet materials are spitting into the following working areas: First, the material guiding zone. Plaster enters this zone and contacts with high temperature hot air to quickly evaporate moisture. The material is in a large lifting flight angle is transferred to the next working area under the splicing; Second, the copy board area, in which the gypsum is drop and pick up by the lifting flight to form the material curtain state. At this time, the material in full contact with the hot air, and the moisture in the plaster is rapid. The evaporative stripping becomes water vapor, and the water vapor is drawn away immediately by the induced draft fan to achieve the purpose of gypsum drying; the gypsum is dried in this zone to a loose state with moisture below 5-10% (or lower), after heat exchange of the material The required moisture state is reached and the final discharge zone is entered. The third is the discharge zone. The roller does not have a copy board in this zone. The material slides in this zone to the discharge port to complete the entire drying process.
Pre-sale
1. According to your needs, select right model for you.
2. According to your special requirements, design customized solution and manufacture customized products for you.
3. Welcome your visit.
Sale
1. Sign contract, pay deposit, we arrange production.
2. Product acceptance.
3. Help you formulate construction scheme.
After-sale
1. Assign engineer service for you on-site freely.
2. Install and adjust device, train how to operate.
3. After installation, leaving 1-2 technical staff to help you on-site production, until achieve customer satisfaction.
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