Working principle:
① The scraper evaporator is started, and a vacuum pump is used to extract vacuum to form negative pressure inside the cylinder. Wastewater enters the scraper evaporator;
② Using steam, thermal oil or hot water as heat sources, the heat source enters the jacket layer and continuously heats the wastewater;
③ Due to the vacuum inside the cylinder, the sewage quickly begins to boil, producing a large amount of water vapor. By using cooling water and water vapor for heat exchange, the water vapor is liquefied into distilled water;
④ The scraper is tightly attached to the inner wall, constantly scraping to avoid scaling on the cylinder wall;
⑤ The wastewater is constantly evaporating, and the concentration of residual wastewater gradually increases. Due to the loss of moisture, it gradually approaches the solid state;
⑥ When the wastewater inside the cylinder is dried to a solid state (with a moisture content below 20%), the equipment stops heating and uses the physical properties of the blade scraper to push the solid waste out of the cylinder;
⑦ Solids are collected and packaged, while liquids continue to be returned to the process for evaporation treatment. Solids are collected and packaged, while liquids continue to be returned to the process for evaporation treatment.
The processing capacity and size power of the scraper crystallization equipment:
| Processing capacity kg/h |
External dimensions (mm) length * width * height |
Weight/kg |
Energy consumption per ton of water kW. h |
| 50 |
two thousand five hundred and twelve × one thousand two hundred and eighty-three × two thousand seven hundred and ten |
1570 |
1.2 tons of steam |
| 150 |
three thousand one hundred and five × one thousand three hundred and seventy-five × three thousand four hundred and twenty-six |
2250 |
1.2 tons of steam |
| 250 |
four thousand two hundred and two × one thousand five hundred and thirty-three × three thousand seven hundred and seventy-five |
2700 |
1.2 tons of steam |
| 375 |
four thousand seven hundred and six × one thousand six hundred and thirty-three × three thousand nine hundred and forty-three |
3900 |
1.2 tons of steam |
| 500 |
four thousand eight hundred and twenty-four × one thousand eight hundred and thirty-three × four thousand three hundred and two |
4200 |
1.2 tons of steam |
| 750 |
four thousand seven hundred and six × two thousand eight hundred and seventy-eight × three thousand nine hundred and forty-three |
6900 |
1.2 tons of steam |
| 1000 |
four thousand eight hundred and twenty-four × three thousand two hundred and seventy-eight × four thousand three hundred and two |
7800 |
1.2 tons of steam |
