High Performance Production Equipment in Calcium Chloride Manufacturing Process
I. Brief Introduction
The atomized solution is sprayed into fluidized bed granulator by spray gun,and the atomized droplets touch with the crystal nucleus layer directly.The droplets adhere to the surface of crystal nucleus and form local infiltration layer.In the meantime,the tiny powders adhere to the local infiltration layer,and the water is removed.Because of the remove of water,the powders and droplets become lamellar and adhere to the surface of crystal nucleus.With the process repeated,the crystal nucleus become larger and larger.In the fluidized bed granulation aera,the crystal nucleus is adhered to water droplets constantly.The crystal nucleus impact with each other,and water is removed gradually.All these make granules grow bigger gradually,layer by layer,and in uniform,also together with the evaporation of water.So,this method ensure the uniform and compact structure of granules,also increase its intensity.Its working principle is mostly accumulated coating granulation,few is reunited granulation.
II. Working Principle and Production Capacity
The raw material is calcium chloride solution. In the whole production process, the major indicator of production cost is energy consumption. After atomized by the spray gun, the calcium chloride solution is touched with the high temperature hot air directly in fluidized bed. The drying touch area is increased more than 1000 times after liquid atomization, and intense heat and mass transfer improve thermal efficiency greatly, and also reduce cost. This technology is the best design of calcium chloride granulation.
A connected atomizer is specially designed in the fluidized bed, the calcium chloride solution is atomized into small droplets through atomizer. The material liquids and droplets contact with different particulate material in the fluidized bed, and adhere to the particle surface to finish dry granulation process.We can get material particles of different size by adjusting the particle shaping system.
Product Parameter
1. Concentration of calcium chloride solution: 35-55%
2. Calcium chloride product: 94%
3. Temperature of solution: <60ºC
4. Capacity: ≥20000 tons per year
Product Name
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Calcium chloride granulation plant/Calcium chloride granulation plant/Calcium chloride equipment from Shandong Banghua
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CaCl2 concentration
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35%-55%
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CaCl2 concentration
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94%
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Power voltage
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380V (±5%)
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Frequency
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50Hz (±1%)
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Power consumption
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115~125 KWh
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Natural gas consumption
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180~190m3
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Circulating cooling water
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2 m3
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III. Features
A. Set spray, drying and granulation in one, make granulation realized in one step,and save energy.
B. Parallel flow way of spray drying is adopted, so that heat sensitive materials can be easily operated.
C. Two stage drying methods: use spray drying and fluidized bed drying, so the water content can be very low.
D. Equipment is operated under closed negative pressure, so no dust generated.
IV. Key to Continuous Working
Continuous fluidized bed spray granulation technology can realize 30 days trouble-free continuous running. The following three tasks must be done to ensure continuous running.
1. Establish a good state of initial fluidization. Unique advanced air distribution plate design provides the premise for combination of liquid and solid with well-proportioned.
2. Unique spray gun provides a micro granulation process for combination of liquid and solid with well-proportioned.
3. Accurate automation process control. PLC or DCS control system is adopted.
V. Energy Saving and Environment Friendly
The positive pressure gas hot air furnace is chosen as the heating source. It can reduce the powder consumption. Instead of the high-temperature relay high-power fan in the negative pressure gas furnace, it chooses the normal temperature supply fan. This can extend the service life of the fan, with small power of draft fan.
As to the waste heat utilization of flue gas exhaust (150-160ºC), the waste heat and calcium powder from the spray tower can increase the calcium chloride concentration. The solution enters into the granulator after the temperature reaches to 60ºC. It will reduce power consumption. The exhaust gas temperature is about 80ºC, and the discharge quantity reduce almost 30%.
For the exhaust gas from the system, it is further washed through the exhaust dust removal tower, and reaches to the environmental protection standard. When the temperature is reduced to 60ºC, it will be discharged to the air.
VI.Company Information
Banghua International Granulation Engineering Co., Limited (hereafter referred as Banghua) was established in 2008.Combining process, engineering experience and manufacturing capabilities, Banghua positions itself in the market of advanced process solutions and process equipment.Banghua provides advanced process technology and complete sets of equipment according to customer's specific requirements.Since 2008, Banghua focus on:
A.Calcium Chloride (CaCl2) Production Line (Granulation Line or Flaking Line)
B.Potassium Sulfate (K2SO4) Production Line
C.Calcium Hypochlorite Production Line
D.Hot Air Furnace & Heat Exchanger
E.Rotating belt Condensation Granulator
Banghua avails one design center and two manufacturing sites, with a total covered surface in excess of 10000 m2. Proprietary equipment is manufactured in the two manufacturing facilities.