How to Select the Best Calcium Chloride Technology

1. Introduction of CalciumChloride

Calcium chloride,with thechemical formula CaCl2. Slightly bitter, tasteless, typical ionic halide, white or off-white, available in flake, spherical, irregular granular, powdery form. It has extremely strong hygroscopic properties and is widely used in snow melting agents, desiccants, oilfield cementing agents, etc. In industrial production, calcium chloride exists mainly in the form of anhydrous calcium chloride and dihydrate calcium chloride.Anhydrous calcium chloride is mainlythesphericaltype; calcium chloride dihydrate,with thechemical formula CaCl2•2H2O, and can be divided intogranule, flake, and powder according to its shape.

The main sources of calcium chloride raw materials are: Supernatant of distilled ammonia produced in the ammonia-soda process of soda ash production, wasteHClproduced in the production of epichlorohydrin, fluorine chemicals, chlor-alkali, compound fertilizer, polysilicon and other industries, etc.

The calcium chloride drying process directly determines the product purity and market competitiveness.

2. The TechnicalIndicators of Calcium Chloride Drying

2. 1 Technology Comparison of Calcium Chloride Drying

Comparison ofspray fluid beddryerand spray tower technology for granulation and drying of anhydrous calcium chloride

Process Parameters	Spray Fluid Bed Dryer	Spray Tower
Maximum capacity of single machine t/a	50000	10000
Exhaust gas dust content %	5%	15%
Particle size mm	1-6	1-2
Floor space	Small	Large
Operating cycle	More than 6 months	Less than 1 month
Final products uniformity	Uniform	Nonuniform

Technology Comparison of Fixed Fluid Bed Dryer and Vibrating Fluid Bed Dryer for CaCl2 Dihydrate Drying

Process Parameters	Fixed Fluid Bed Dryer	Vibrating Fluid Bed Dryer
Maximum capacity of single machine TPA	150000	50000
System floor area	Small	Large (about twice as much as the fixed fluid bed dryer)
Maintenance frequency	Low	High
Operating cycle	Long (continuous operating)	Short (less than 1 month)

2. 2 Typical Indicators and Consumption of Calcium Chloride Drying

Process Indicators ofCaCl2Dryer

Consumption Comparison List of CaCl2 Granule and CaCl2 Flake

Note: The steam price is 260 yuan/ton, the electricity price is 0. 7 yuan/kWh, and thecapacityis 100, 000TPA.

3. Analysis ofMainstreamCalcium Chloride Drying Technologies

3. 1 SprayFluidBedDryingTechnology (optimal selection for anhydrous CalCl2 granule products)

Operating process:

Waste acid solution → calcium chloride reaction neutralization system → calcium chloride spray fluid beddryer→ anhydrous calcium chloridegranule

Advantages:The material can be dried, cooled and granulated at the same time. Improve the fluidity, dispersibility and solubility of thegranules.

3. 2 FluidBedDryingTechnology (optimal selection for CalCl2 dihydrate flake products)

Operating process: low concentration calcium chloride solution → calcium chloride evaporation and concentration system → calcium chloride flake machine → calcium chloride fluid bed drying system → calcium chloride dihydrate flake

Advantages: large drying capacity of a single machine, stable operation, long service life, applicable to the drying production of calcium chloride dihydrate flake astheby-product in various industries.

3. 3 SprayRotaryGranulationTechnology (optimal selection for CalCl2 dihydrate granule products)

Operating process: low concentration calcium chloride solution → calcium chloride evaporation concentration system → spray rotary dryer → calcium chloridedihydrate granule

Advantages:steam rotary drying device ofcalciumchloride dihydrate granule,with thevariable frequency control of the rotating machine, adjustable speed, adjustable residence time in the dryer, controllable material drying degree and discharge temperature; no manual block arrangement process is required, no operator is required on site; strong adaptability to feed fluctuations.

4.EquipmentSelection Guide

4. 1 Determine theForms:

Granule(cementing agent, desiccant) → spray fluid bed drying technology, spray rotary granulation technology

Flake (snow-meltingagent) → fluid bed drying technology

4. 2 Review theVendor'sAbility

With customized design capabilities, Tianli has a complete set of process packages for calcium chloride production technology. Tianli has developed a series of nozzles suitable for 69% concentration calcium chloride solution.

In terms of patent technology, Tianli has applied for 11 patents in the field of calcium chloride and has been granted 10 patents (patent number: ZL202221735849. X).

4. 3 EnvironmentalRequirements

Tianli calcium chloride drying technology has small tail gas volume, and the core technology ensures that the tail gas meets the standard (≤50mg/m³).

5. Referenceof Tianli Calcium Chloride Drying

1)Jiangxi Jinghao Calcium Chloride Dihydrate Flake Project

Material:Calcium Chloride Dihydrate Flake

Industry: Well and rock salt

Process: fixed fluid bed dryer

Single machine capacity:13 TPH

Calcium chloride raw material content: 68-70%

Calcium chlorideproduct content: 74%

2) Dofluoro 10, 000 TPA anhydrous calcium chloride granulation project

Material:anhydrous calciumchloride granule

Industry: Fluorine Chemicals

Process: spray fluid bed dryer

Single machine capacity: 2 TPH

Calcium chloride raw material content: 30-40%

Calcium chloride product content: 94-96%

3)Shandong Haihua 80, 000 TPA calcium chloride dihydrate granulation project

Material: Calcium chloride dihydrate

Industry: Salt chemical industry

Process: Spray rotary granulation dryer

Single machine capacity: 13 TPH

Calcium chloride raw material content: 65-69%

Calcium chloride product content: 77%

6. Conclusion

Tianli calcium chloride drying system can run continuously at full load for a long time, with little dust generation and low failure rate during operation, effectively reducing the maintenance time of the system. The products produced have uniform particles, large bulk density, high product purity, and product indicators can meet the highest requirements of the industry. Tianli Company hastheClass A chemical design institute, which can provide customers with professional services in process design, productmanufacturing, installation and commissioning, and technology upgrades.