A boiler soot blowing steam waste heat recovery system

By adjusting the angle of attack and pitch of the flexible guide vane array through the equipment and control devices in the boiler soot blowing steam waste heat recovery system, the problem of reduced heat exchange efficiency caused by alternating thermal stress and mechanical impact was solved, and stable heat exchange of the system was achieved.

CN122408064APending Publication Date: 2026-07-17HUANENG LINYI POWER GENERATION CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUANENG LINYI POWER GENERATION CO LTD
Filing Date
2026-04-20
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In existing technologies, the recovery of waste heat from boiler soot blowing steam is subject to alternating thermal stress and mechanical impact, which damages the steady-state film-like condensation layer on the surface of the heat exchange tubes, resulting in obstructed latent heat transfer and a decrease in system heat exchange efficiency.

Method used

A boiler soot blowing steam waste heat recovery system is adopted, including a warm-pipe exhaust steam diversion pipe, a pulse energy dissipation premixing component, a desuperheating water supply branch pipe, a pressure sensing component, an acoustic emission monitoring component, and a piezoelectric actuation component. The angle of attack and pitch of the flexible guide vane array are adjusted by the control device to adjust the flow cross-sectional area and realize dynamic closed-loop adaptation of momentum exchange between gas and liquid phases.

Benefits of technology

It effectively avoids alternating thermal stress and mechanical impact, maintains the integrity of the steady-state film condensation layer on the surface of the heat exchange tube, and improves the overall heat exchange efficiency of the system.

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Abstract

The present application relates to boiler soot blowing steam waste heat recovery technical field, especially to a kind of boiler soot blowing steam waste heat recovery system, including equipment device and communication connection control device;Equipment device contains warm pipe exhaust steam drainage pipe, pulse energy-absorbing premixing component, desuperheating water supply branch pipe, low-pressure bypass exhaust steam main pipe, pressure sensing component, acoustic emission monitoring component and piezoelectric actuator component.Warm pipe exhaust steam enters pressure relief diffusion into variable cross-section cyclone shear phase change cavity after entering expansion buffer chamber, impact the cyclone water film formed by desuperheating water and separate into atomized droplet group, absorb heat and phase change into homogeneous phase steam-water mixture.Control device calculates shear kinetic energy threshold according to the analog voltage signal output by sensing component, drives piezoelectric actuator component to adjust the angle of attack and pitch of flexible guide vane array, realizes dynamic closed-loop adaptation to thermodynamic boundary conditions.
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