Desulfurization gypsum rotary dryer

Desulfurization gypsum rotary dryer

Our company is the first company in China to adopt three-layer rotary drum to dry desulfurization gypsum. This equipment saves energy by one-third compared with the traditional rotary tumble dryer, which greatly reduces the production cost. The equipment is suitable for the drying of materials such as gypsum and fly ash.

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  • Desulfurization gypsum rotary dryer
  • Desulfurization gypsum rotary dryer
  • Desulfurization gypsum rotary dryer
  • Desulfurization gypsum rotary dryer

Desulfurization gypsum exercise process: The main application of desulfurization gypsum is to use it as a retarder for cement, or to form hemihydrate gypsum for the manufacture of gypsum board, gypsum block and plaster. Building gypsum processing can be divided into direct method and indirect method according to different heat transfer methods:
1. Indirect method (two steps of drying and calcining): The two-step method of drying and calcining is based on the energy situation and environmental protection requirements of the power plant, and the free water that is easy to escape and the crystal water that is difficult to escape are placed in two equipments. It is more reasonable and also facilitates product structure adjustment and quality control. The device can produce dry dihydrate gypsum (for cement retarder) and super superior product beta gypsum.
2. Direct method (one-step method of drying and calcining): One-step drying and calcining method is a set of gypsum calcination process equipment designed and developed by using three-layer drum drying technology with extremely high heat and mass transfer efficiency. The process device can produce dry dihydrate gypsum (for cement retarder), and can also produce hemihydrate gypsum. The wind temperature for producing dry dihydrate gypsum is only 120 ° C, and the low temperature flue gas of the thermal power plant can be fully utilized.

The desulfurization gypsum enters the dryer drum from the feeding device to achieve downstream drying. The desulfurization gypsum is continuously copied and scattered under the inner layer of the copying plate to realize heat exchange in the spiral traveling mode, and the material is continuously in the middle layer. The ground is repeatedly advanced, and it is carried out in a two-step step. The material in the middle layer not only absorbs the heat emitted by the inner roller, but also absorbs the heat of the middle roller, and at the same time prolongs the drying time, and the material is optimally dried here. status. The material that achieves the drying effect quickly travels out of the drum under the action of hot air. The wet material that has not reached the drying effect cannot travel quickly due to its own weight, and the material is sufficiently dried in the rectangular copy board to thereby achieve the drying effect and complete the drying process.

Desulfurization gypsum rotary dryer Features:
1, 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;
2, 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.
1)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;
2)Patented layered Desulfurization gypsum rotary 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.
3, 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.
4, 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.
5, 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.
6, 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.
7, 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.
8, 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 Rotary Drum Dryer Specification:
 

Equipment

Capacity(t/d)

Moisture content of raw material(%)

Moisture content of final product(%)

Total power(kw)

Spatial footprint(m2)

1615

200

15-40

5-10

100

8*25

1916

300

15-40

5-10

120

8*26

2218

500

15-40

5-10

160

10*35

2520

700

15-40

5-10

200

10*40

2820

1000

15-40

5-10

290

12*40

3430

1500

15-40

5-10

420

15*46

4032

2000

15-40

5-10

500

15*50

Note: 

1. The internal structure of desulphurization gypsum and gypsum mineral powder drying equipment are completely different, and the specific consulting company is dedicated.
2. The production capacity of the equipment is directly related to the proportion of desulphurized gypsum and gypsum mineral powder to reduce the water content. The proportion of precipitation is large and the production capacity of the equipment is reduced accordingly.



Desulfurization gypsum rotary dryer overview:
Desulfurization gypsum rotary dryer is a kind of dryer equipment. With the increase of environmental awareness, China's emission control of sulfur dioxide in coal-fired flue gas of power plants is getting tighter and tighter, and desulfurization of power plants is imperative. At present, the treatment process and equipment for desulfurization gypsum are not completely the same as natural gypsum, such as in material transportation, dust treatment, calcination process, and the like. Desulfurization gypsum is also different from natural gypsum. For example, desulfurization gypsum has high purity, free water and fine particle size; particle size distribution is uniform, gradation is poor, and the water content of the standard thick is large. It is also worth noting that desulfurization gypsum and natural The source of gypsum is different. The unreacted calcium carbonate in the desulfurized gypsum is the main impurity and the calcium sulfite which is not completely oxidized, the composition of the limestone raw material is different, and the difference in the fineness of the processed limestone affects the quality of the desulfurized gypsum.

 The technology is at the leading level in China and its working principle. As follows: the desulfurization gypsum enters the inner layer of the three-layer drum from the feeding device to achieve downstream drying, and the desulfurization gypsum continuously picks up under the inner layer of the plate, and is scattered and spiraled to realize heat exchange, and the material moves to the inner layer. The other end enters the middle layer and is subjected to countercurrent drying. The material is continuously advanced in the middle layer and is in a two-step step backward. The material in the middle layer fully absorbs the heat emitted by the inner layer roller and absorbs the heat of the middle layer roller. At the same time, the drying time is extended and the material is optimally dried. The material goes to the other end of the middle layer and falls into the outer layer. The material travels in a rectangular multi-loop manner in the outer drum. The material that achieves the drying effect quickly travels out of the drum under the action of hot air. The wet material that does not reach the drying effect cannot be fast due to its own weight. As the material travels, the material is sufficiently dried in the rectangular copy board to thereby achieve a drying effect and complete the 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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