一种脱氢生产环己酮废水回用系统
By directly reusing the wastewater generated from the cyclohexanone dehydrogenation process for cyclohexene purification in the cyclohexene tower, the problems of high energy consumption and resource waste in wastewater treatment during cyclohexanone production are solved, achieving gradient reuse of wastewater and environmental protection and energy-saving effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XUYANG ENG CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing cyclohexanone production process, wastewater treatment suffers from high energy consumption and low removal rate, and the consumption of high-purity water and wastewater discharge lead to resource waste and environmental problems.
Wastewater generated from the cyclohexanone dehydrogenation process is directly reused for cyclohexene purification in the cyclohexene tower. Through a multi-stage water seal tank and wastewater transfer pump system, the wastewater is centrally recovered and reused in stages, replacing high-purity water and simplifying the treatment process.
It reduced equipment investment and operating costs, decreased the consumption of high-purity water and wastewater discharge, and achieved wastewater recycling and environmental protection effects.
Smart Images
Figure CN224513222U_ABST
Abstract
Claims
1. A system for recycling wastewater produced in the dehydrogenation of cyclohexanol to cyclohexanone, comprising a wastewater input unit, characterized in that, The wastewater reuse system also includes a water seal tank and an olefin tower. The output end of the wastewater input unit is connected to the input end of the water seal tank, and the output end of the water seal tank is connected to the aqueous phase input end of the olefin tower.
2. The system for recycling wastewater from dehydrogenation production of cyclohexanone according to claim 1, characterized in that, The wastewater input unit includes a negative pressure tower ejector, a dehydration tower reflux tank, an alcohol-ketone drying tower reflux tank, and a light second tower reflux tank. The output ends of the negative pressure tower ejector, the dehydration tower reflux tank, the alcohol-ketone drying tower reflux tank, and the light second tower reflux tank are respectively connected to the water seal tank.
3. The system for recycling wastewater from dehydrogenation production of cyclohexanone according to claim 2, characterized in that, The water seal tank includes a first water seal tank, a second water seal tank, and a third water seal tank. The output end of the negative pressure tower ejector is connected to the input end of the first water seal tank. The output ends of the dehydration tower reflux tank and the alcohol-ketone drying tower reflux tank are respectively connected to the input end of the second water seal tank. The output end of the light tower reflux tank is connected to the input end of the third water seal tank. The output ends of the first, second, and third water seal tanks are respectively connected to the aqueous phase input end of the olefin tower.
4. The system for recycling wastewater from dehydrogenation production of cyclohexanone according to claim 3, characterized in that, The output ends of the first water seal tank, the second water seal tank, and the third water seal tank are respectively connected to the input end of the wastewater transfer pump, and the output end of the wastewater transfer pump is respectively connected to the aqueous phase input end of the three-stage alkenyl tower and the input end of the wastewater treatment system.
5. The system for recycling wastewater from dehydrogenation production of cyclohexanone according to claim 4, characterized in that, A shut-off valve assembly is provided between the water seal tank and the three-stage olefin tower. Wastewater from the first, second, and third water seal tanks is independently transported to the three-stage olefin tower and wastewater treatment system via a wastewater transfer pump and the shut-off valve assembly.
6. The system for recycling wastewater from dehydrogenation production of cyclohexanone according to claim 5, characterized in that, The wastewater transfer pumps include a first wastewater transfer pump, a second wastewater transfer pump, and a third wastewater transfer pump. The shut-off valve assembly includes a first water supply valve, a second water supply valve, a third water supply valve, a first drain valve, a second drain valve, and a third drain valve. The output end of the first water seal tank is connected to the input end of the first wastewater transfer pump. The output end of the first wastewater transfer pump is connected to the aqueous phase input end of the olefin tower and the input end of the wastewater treatment system via the first water supply valve and the first drain valve, respectively. The output end of the second water seal tank is connected to the input end of the second wastewater transfer pump. The output end of the second wastewater transfer pump is connected to the aqueous phase input end of the olefin tower and the input end of the wastewater treatment system via the second water supply valve and the second drain valve, respectively. The output end of the third water seal tank is connected to the input end of the third wastewater transfer pump. The output end of the third wastewater transfer pump is connected to the aqueous phase input end of the olefin tower and the input end of the wastewater treatment system via the third water supply valve and the third drain valve, respectively.