A denitration pipeline anti-blocking and anti-crystallization control method and system based on state monitoring

An adaptive control method combining multi-segment zoned heating units and temperature sensors has solved the blockage problem in ammonia delivery pipelines caused by crystallization and particulate matter accumulation, achieving energy consumption optimization and system stability, and supporting maintenance without interrupting production.

CN122399533APending Publication Date: 2026-07-17大唐三门峡电力有限责任公司

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
大唐三门峡电力有限责任公司
Filing Date
2026-04-23
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In existing industrial exhaust gas denitrification systems, ammonia delivery pipelines are prone to blockage due to crystallization and particulate matter accumulation. Traditional heating devices cannot adapt to changes in operating conditions, resulting in energy waste and partial failures.

Method used

By combining multi-segment zoned heating units with temperature sensors, the heating power is dynamically adjusted through real-time monitoring of pipeline temperature, flow rate, and differential pressure. Combined with PID algorithms and differential pressure change rate to determine blockage risk, adaptive control is achieved.

Benefits of technology

It enables precise control of the temperature throughout the pipeline, reduces energy consumption, prevents blockages, ensures stable system operation, reduces production accidents, and supports maintenance without interrupting production.

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Abstract

本发明公开了一种基于状态监测的脱硝管道防堵防结晶控制方法及系统,属于工业脱硝设备控制技术领域,通过多维度采集管道全域温度、氨气流量、进出口压差参数;计算压差变化率并动态修正阈值,判定堵塞风险;基于基准温度进行基础功率调整,结合堵塞风险、氨气流量进行功率关联与适配调整;通过闭环反馈校准功率,配合故障补偿与多重警报实现安全保护,通过数据获取模块、状态判断与功率计算模块、加热控制模块、存储与警报模块,与脱硝管道的分区加热单元、各类传感器配合实现结晶处的疏通,本发明实现加热功率自适应调控,兼顾防堵防结晶效果与能耗控制,提升脱硝管道运行的稳定性与安全性。
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