Regenerated gas waste heat recovery system for ionic liquid desulfurization process

Through the system of parallel lean-rich liquid heat exchangers and phase change condensers combined with high-temperature heat pumps and energy storage tanks, the problem of large heat energy loss in the regeneration tower is solved, the efficient recovery of regeneration gas waste heat and intelligent management of heat energy are achieved, and steam consumption and operating costs are reduced.

CN120593548APending Publication Date: 2025-09-05XIAN JIAOTUO ENERGY TECH CO LTD
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Patent Information

Application Number
CN202510811513.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-18
Publication Date
2025-09-05

AI Technical Summary

Technical Problem

In the existing ionic liquid desulfurization process, the heat energy loss in the regeneration tower is large, especially the steam latent heat carried by the regeneration gas cannot be effectively recovered, resulting in increased heat consumption.

Method used

The system adopts parallel lean and rich liquid heat exchangers and phase change condensers combined with high-temperature heat pumps and energy storage tanks. Through multi-stage condensation and energy storage peak regulation, the latent heat of the regenerated gas is recovered and hot water is used instead of steam to heat the rich liquid. Intelligent management is achieved in combination with PLC control.

Benefits of technology

It achieves efficient recovery of waste heat from regenerated gas, reduces steam consumption and cooling load, improves thermal energy utilization efficiency, reduces operating costs and avoids waste heat.

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Abstract

The invention provides an ionic liquid desulfurization process regenerated gas waste heat recovery system which comprises an absorption tower, a regeneration tower, a first phase change condenser, a barren liquor cooler, a second phase change condenser, a steam-water separator, a regenerated gas cooler, a reboiler and an industrial heat energy conversion cold and heat balance island, the industrial heat energy conversion cold and heat balance island comprises a high-temperature heat pump, a low-temperature hot water energy storage tank, a high-temperature hot water energy storage tank, a water supplementing tank, a standby steam heat source plate heat exchanger and a PLC control unit. The steam consumption can be reduced, the cooling load of the regeneration gas is reduced, water and electricity are saved, and waste of waste heat of the regeneration gas is avoided; compared with a steam system, the adopted hot water system is greatly reduced in operation and maintenance cost, few matched equipment is needed, operation is more stable, and the water hammer phenomenon is avoided; by arranging the industrial heat energy conversion cold and heat balance island, intelligent centralized control of heat grade improvement, cold and heat combined supply and energy storage peak regulation and gradient utilization of energy electrification control are achieved.
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