Auxiliary steam header steam supply system

By adding a third transmission branch pipe to the steam transmission bypass structure and connecting it to the auxiliary steam header, and controlling it with valves, the steam supply problem after the thermal power plant unit is shut down is solved, ensuring the continuity of production when the boiler is not shut down.

CN224470207UActive Publication Date: 2026-07-07HUADIAN POWER INTERNATIONAL CORPORATION LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HUADIAN POWER INTERNATIONAL CORPORATION LTD
Filing Date
2025-08-09
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

After all units of the thermal power plant are shut down, the steam supply for the turbine shaft seal, the steam source for urea to ammonia production, the heat tracing of the urea to ammonia supply pipeline, and the steam source for air preheater soot blowing are lost while the boilers are not shut down, affecting normal production operations.

Method used

Based on the existing steam transmission bypass structure, a third transmission branch pipe is added to connect to the auxiliary steam header. The steam flow direction is controlled by valve switching to realize steam supply to the auxiliary steam header, which meets the needs of turbine shaft seal, urea ammonia production, urea ammonia supply pipeline heat tracing and air preheater soot blowing.

Benefits of technology

Steam was supplied to the auxiliary steam header while the boiler was running, ensuring the normal start-up and production operation of the unit.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224470207U_ABST
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Abstract

The utility model relates to auxiliary steam header steam source supply system, including four branch pipes connected with rear smoke well lower collecting box, four branch pipes all are connected with the transportation main pipe, the three -way joint is connected in the end of transportation main pipe, one interface of three -way joint is connected with first transportation branch pipe, another interface of three -way joint is connected with second transportation branch pipe, the end of first transportation branch pipe is connected main condenser, the end of second transportation branch pipe is connected fixed row hydrophobic expansion vessel, connect third transportation branch pipe on first transportation branch pipe, the end of third transportation branch pipe is connected with auxiliary steam header, the utility model is based on the existing steam transportation bypass structure, carries out the structural reconstruction, adds third transportation branch pipe and connects to auxiliary steam header, reaches the steam in transportation main pipe under the condition of not fire extinguishing state in boiler after all unit complete shutdown, will steam to auxiliary steam header steam supply purpose, satisfies steam turbine shaft seal, urea ammonia, urea ammonia supply pipeline heat tracing and auxiliary steam to air preheater soot blowing steam requirement.
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