Recovery system of waste heat in petrochemical plant
By combining multi-stage heat pump units and boiler units, the problem of waste heat recovery in petrochemical plants has been solved, enabling efficient utilization of waste heat at different temperatures and flow rates, improving energy efficiency and reducing coal consumption.
CN122191832APending Publication Date: 2026-06-12JIANGSU HEHAI URBAN ENERGY CONSERVATION RES INST CO LTD +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIANGSU HEHAI URBAN ENERGY CONSERVATION RES INST CO LTD
- Filing Date
- 2024-12-11
- Publication Date
- 2026-06-12
AI Technical Summary
Technical Problem
Waste heat recovery in petrochemical plants is difficult to efficiently handle high, medium, and low temperature waste heat at different temperatures and flow rates, leading to energy waste and environmental pollution.
Method used
A multi-stage heat pump unit and boiler unit combined system, along with a circulating water system and a high-temperature condensate circulation system, is adopted to achieve efficient recovery and utilization of waste heat through multi-source combined utilization and cascade utilization.
Benefits of technology
It significantly improves energy efficiency, with an overall COP of 7 and a single-line output power of 50MW, reducing coal consumption, lowering waste heat emissions, and improving the environment.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122191832A_ABST
Abstract
The present application relates to a kind of petroleum chemical plant waste heat recovery system, it includes circulating water system, high temperature condensate circulating system, heat pump unit and boiler unit, high temperature condensate circulating system is used to recycle and utilize the high temperature condensate of petroleum chemical plant after first steam and second steam use, heat pump unit is gradually heated to heating water by absorbing the waste heat in circulating water system and high temperature condensate circulating system, the steam of boiler unit is partly used to make the high temperature condensate of high temperature condensate circulating system into second steam;Another part is directly supplied to the production line of petroleum chemical plant with first steam.The waste heat recovery system of petroleum chemical plant of the present application is used by multi-source combination and cascade utilization, uses the mode of optimized boiler steam distribution, comprehensive recovery circulating water waste heat, high-efficiency recycling high temperature condensate and stable heating municipal water, realizes the utilization of a large number of different temperature, different flow high, medium and low temperature waste heat.
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