| Customization: | Available |
|---|---|
| Condition: | New |
| Automation: | Automatic |
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Using hydrochloric acid to produce calcium chloride dihydrate process:
Hydrochloric acid and limestone were put into the reaction tank according to a certain ratio, and the reaction was carried out under agitation to produce acid calcium chloride solution; Add lime milk to adjust the pH of feed liquid; The material liquid is filtered through the plate and frame filter press and clarified in the clarifying tank; After natural circulation evaporation in the single-effect evaporator, forced circulation evaporation in the two-effect evaporator, high temperature concentration in the three-effect evaporator, up to 68%, and then through the slicer for production, into sheet products; Then the belt conveyor enters the vibrating fluidized bed for drying. When the calcium chloride content reaches 70-74%, it is transferred to the roller cooler for cooling, and the packaging is stored.
Features:
1) The fluidization is uniform and stable, no dead bed and blow through phenomenon, and can obtain uniform, dry and cooled products.
2) Vibration motor running smoothly, easy maintenance, low noise, long equipment life.
3) Good adjustability, the thickness of the material layer, the residence time in the machine, the amplitude of the machine can be adjusted stepless within the design range.
4) The working environment is clean and can be continuously operated.
5) The heating method is direct steam heating, high thermal efficiency, good energy saving effect, energy saving 30%-60%.
Production process of anhydrous calcium chloride using waste hydrochloric acid:
The by-product hydrochloric acid, waste acid and limestone were put into the reaction tank according to a certain ratio, and the reaction was carried out under agitation to produce acid calcium chloride solution; Add lime milk to adjust the pH of feed liquid; The material liquid is filtered through the plate and frame filter press and clarified in the clarifying tank; The clear liquid is sent into the spray tower to form a very fine mist liquid bead, and the filtered and heated air and flow contact, the water evaporates instantly, and the finished product is dried in a very short time. Through the cyclone powder collector and the cloth bag powder collector, the finished product is entered into the finished powder bin for measurement and packaging.
Features:
1) Calcium chloride products are obtained by spray drying process. It is suitable for producing powder and granular solid products from solution, emulsion, suspension and paste liquid raw materials.
2) Fast drying speed and stable product. After the solution is atomized, the heat exchange area is increased, and 95%-98% of the water can be evaporated instantly in the hot air flow, and the product generation time is only a few seconds, reducing the corrosion of the solution to the equipment.
3) The product has high purity, good quality, uniform particles and good fluidity.
4) The production process is simple and the operation control is convenient. One production into powder products, no need to crush and screening, reduce the production process.
5) The use of titanium alloy atomization disk, zirconia ceramic nozzle, PP pipe and other technical measures effectively reduce the corrosion of the equipment, extend the service life of the equipment.
6) The atomizer adopts high-precision bearings and all gear grinding, the accuracy is above 5, and the long cantilever structure can realize automatic alignment and reduce the vibration of the spindle and atomizing disk.
7) Small and medium-sized spray dryer and intermittent operation can be manually controlled, suitable for products that are relatively easy to dry; In the case of large-scale continuous production and not easy to dry, automatic control can be used to control the water content in a narrow range.
Lime production line,table of main technical and economic indicators
| NO. | The name of the marker | Unit | Number value |
| 1 | Number of shaft kilns | set | 2 |
| 2 | Single kiln inside/outside diameter | m | 2.85/4.3 |
| 3 | Effective calcination height | m | 21 |
| 4 | Utilization coefficient | t/m3.d | ~0.8 |
| 5 | Daily lime | t/d | ≥70 |
| 6 | Average operation rate | % | ≥95 |
| 7 | Lime decomposition rate | % | >90 |
| 8 | Limestone consumption | t/t. Ash | 1.65 |
| 9 | Calcination temperature | ºC | 1100-1200 |
| 10 | Natural gas consumption | m3/mt Ash | 125 |
| 11 | Power consumption | kWh/t | <18 |
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