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The innovated tubular rotary cooling furnace is a remarkable patented product invented by our company in 2008. It has been running stably for over ten years with the multiple advantages including small size, high cooling heat transfer efficiency, low operation and maintenance cost, no water waste, no pollution and zero discharge on site, which is easy, cost-saving and more friendly to the environment.
The temperature for fluorgypsum feed is 250℃, the discharge temperature can be below 60℃. Also the discharge temperature can be flexibly adjusted according to the needs, which is definitely technological revolution victory compared to the old water-shower structured cooling machine. Shandong Zibo Bofenglizhong Chemical Co., Ltd. from Hydrogen fluoride industry has equipped its two production lines (capacity of 50,000 tons) with two sets of φ2×18m fluorine gypsum coolers which has been put into operation and production successfully.
So far our tubular rotary cooling furnace has been applied to different industries including coal chemical engineering, lithium salt, activated carbon, and Hydrogen fluoride gypsum cooling, and our equipment and technologies has been fully recognized by these industries with capacity over ten million or ten thousands tons.
The regular equipment specifications areφ2×18m、φ2.5×13.7m、φ2.5×18m, and we can also tailor made equipment specifications based on user’s requirement (feed amount, temperature, material properties, etc.), in order to meet various working conditions.
In terms of sealing and cooling methods, please refer to the below details for equipment structure and the technical advancement:
Feed screw 2. Feed tank 3. Sealing device 4. Roller 5. cylinder
6. big gear ring 7. Roller 8. discharge box 9. rotating joint
10. rotating joint supports 11. discharge box supports
12. blocking roller device 13. conveyor
14. heating exchange system 15. Support Roller 16. Feed tank supports
The cooling furnace adopts the Tubular heat exchange cooling system. It provides large exchange area to improves the heat exchange efficiency, so the material cooling speed is fast. And the cooling water does not make direct contact with the material, and is circulated in the relatively closed pipeline with nearly zero consumption.
The front end of the cooling furnace is equipped with a material guide screw, which can feed the material into the cooling zone faster. Then the material will be cooled after indirect heat exchange with the cooling water through the tube wall when going through the cooling zone, and then be discharged from the discharge port. The tube is supported by a tube frame fixed on the cylinder, and the floating connection structure is used between the tube frame and the tube in order to avoid the damages caused by thermal expansion and cold contraction.
The cooling water enters the heat exchange system through the rotary joint at the end of the furnace for heat exchange and cooling purpose. After heat exchange, the cooling water flows out from the central water pipe through the return pipe. The adopted countercurrent method will optimize the cooling efficiency on materials.
The discharge sealing function is good and easy to operate. The discharge seal between the two sides of the discharge box and the cylinder adopts a flexible double seal sheet, and the flexible sheet is connected with heat-resisting and wear-resistant sealing blocks. The wear-resistant sealing blocks are closely attached to the sealing surface of the cylinder through the elastic deformation of the flexible sheet and the counterweight added to the steel wire rope wrapped around the flexible sheet, keeping the gas and dust inside the discharge box. The sealing condition will be changed by adjusting the number of counterweight blocks which will guarantee the sealing performance of discharge and also extend the service time of counterweight blocks.
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