A new ammonia evaporation energy-saving process system

By adding a secondary ammonia stripping unit and a flash tank after the ammonia stripping tower in a coking plant, and combining it with a steam ejector to achieve multiple cycles of steam utilization, the problem of high steam consumption is solved, and significant energy saving, consumption reduction and low carbon goals are achieved. It is applicable to both direct and indirect ammonia stripping systems.

CN120903613BActive Publication Date: 2026-05-01HAILIYUAN (TIANJIN) ENG TECH CO LTD
2 Cites 0 Cited by

Patent Information

Application Number
CN202511140101.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-08-14
Publication Date
2026-05-01
Estimated Expiration
2045-08-14

AI Technical Summary

Technical Problem

The existing ammonia stripping towers in coking plants have high steam consumption, resulting in energy waste and high carbon emissions, and the cost of upgrading the existing system is also high.

Method used

A secondary ammonia stripping unit is connected in series after the original ammonia stripping tower to introduce new steam for secondary treatment. The waste heat of the wastewater is recovered by a flash tank to generate flash steam. The flash steam is mixed with the new steam by a steam ejector, pressurized and returned to the system to achieve multiple cycles of steam utilization.

Benefits of technology

Without large-scale modifications to existing systems, steam consumption can be reduced by 35% to 45%, steam utilization can be improved, energy consumption and carbon emissions can be reduced, operating costs and equipment maintenance costs can be lowered, and different operating conditions can be adapted to achieve automated operation.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The present application relates to the field of coking, synthetic ammonia and the like containing ammonia wastewater treatment, and discloses a novel ammonia evaporation energy-saving process system, a primary ammonia evaporation tower, an intermediate pressurizing pump set, a water flow regulating device, a secondary ammonia evaporation device, a flash tank, a steam ejector, a pressurizing pump set and a control unit. After the ammonia-containing wastewater is preliminarily treated by the primary ammonia evaporation tower, it is delivered to the secondary ammonia evaporation device by the pressurizing pump, and introduced into new steam for secondary ammonia evaporation. After the secondary ammonia evaporation, the wastewater flows into the flash tank to produce flash steam by cooling and pressure reduction, and the flash steam is pressurized by mixing with the new steam through the steam ejector, and then returns to the primary ammonia evaporation tower or the secondary ammonia evaporation device, so that the steam is recycled multiple times. The system can effectively reduce the new steam consumption by 35-45% under the premise of ensuring the stability of the ammonia nitrogen index of the effluent, improve the energy utilization rate, reduce carbon emissions, and is suitable for direct ammonia evaporation and indirect ammonia evaporation systems.
Need to check novelty before this filing date? Find Prior Art