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Iron and steel industry

Laiwu Iron and Steel Group Taidong Industrial Co., LTD

Project name: Steel fly ash comprehensive utilization of potassium sodium crystal salt
Customer unit: Laiwu Iron and Steel Group Taidong Industrial Co., LTD
Scheme design: 10t/h steel fly ash comprehensive utilization of potassium sodium crystallization salt separation system

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Project Introduction
Scheme design: 10t/h steel fly ash comprehensive utilization of potassium sodium crystallization salt separation system
1. Product scheme: hydrolysis softening +MVR evaporator + sodium chloride-potassium chloride evaporation crystallization
2. Material name: potassium chloride and sodium chloride solution
3. Feed: Potassium chloride 8-14.6%, sodium chloride 2-3.6%
4. Material initial temperature: 25℃ (set)
5. Cooling water inlet temperature: 30℃ ~ 32℃
6. Cooling water outlet temperature: 35℃ ~ 40℃
7. Evaporator capacity: 300t/d
8. Evaporation capacity of evaporator: 9-10t/h
9. Evaporator material: wastewater contains high concentration of sodium chloride, serious corrosion of general materials, so TA2 is used as the main material

Product Features
MVR is the abbreviation of mechanical vapor recompression technology, which uses the secondary steam and energy generated by the evaporation system itself to compress low-grade steam into a high-grade steam heat source through the mechanical work of the steam compressor. This cycle provides heat energy to the evaporation system, reducing the demand for external energy, thereby improving thermal efficiency, reducing energy consumption, reducing pollution, and achieving the purpose of energy saving.
Project results
1. The equipment has been put into operation for 4 years, and the operating cost of a ton of water has been reduced to 400~450 yuan, which has eased the pressure of flying ash landfill in rigid landfills.
2. Realized resource recycling:
Sodium chloride purity is greater than 97.5%, industrial dry salt grade, in line with GB/T5462-2015 index requirements.
Potassium chloride purity is greater than 90%, industrial grade, in line with GB/T7118-2008 index requirements.
3. This project is a model project for collaborative disposal of fly ash in the iron and steel industry, and the process technology is currently at the domestic and foreign level.
Project site
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