Flow regulating device for boiler superheater or reheater distributing header branch pipe

Abstract

The invention discloses a flow regulating device for a boiler superheater or a reheater distributing header branch pipe. The flow regulating device comprises a main header body, an inner sleeve and an importing pipe, the inner sleeve is arranged in a cavity of the main header body, the outer wall of the inner sleeve and the inner wall of the main header body form an annular cavity, a plurality of through holes are reserved in the sleeve wall of the inner sleeve, the left end of the inner sleeve is blocked at the left end of the main header body through a left sealing connecting unit, the right end of the inner sleeve is blocked at the right end of the main header body through a right sealing connecting unit, the importing pipe is in butt joint with the left end of the inner sleeve, the importing pipe after being in butt joint is communicated with the inner sleeve, superheated steam from the superheater or the reheater is imported into the inner sleeve by the importing sleeve and is imported into a branch pipe after being secondly distributed in the annual cavity formed by the inner sleeve and the main header body so as to regulate flow in the branch pipe. The flow regulating device can regulate steam flow from the branch pipe according to running condition of utility boiler heated wall temperature.

Description

technical field [0001] The invention relates to a flow regulating device for a boiler superheater or a reheater, in particular to a flow regulating device for a distribution header branch pipe of a boiler superheater or a reheater. Background technique [0002] During the operation of power plant boilers, high-temperature superheaters and reheaters are washed by high-temperature flue gas. In order to ensure the safety of these high-temperature heating surfaces, throttle coils are generally installed at the outlets of parallel branch pipes of superheater and reheater headers. , to adjust the flow distribution of superheated and reheated steam in the branch pipe of the header. During operation, the uneven flow distribution in the parallel branch pipes of the distribution header of the superheater will cause local overheating of the pipes. However, the traditional header will generate local eddy current at the entrance of the T-shaped tee, resulting in uneven pressure of the h...

AI Technical Summary

Problems solved by technology

[0006] The flow regulating device of the present invention eliminates the influence of eddy current on the static pressure by distributing the steam twice, and can promote the uniform distribution of high-temperature superheated steam or reheated steam. By changing the geometric structure and position of each component in the flow regulating device, the solution Problems of Flow Regulation in Branch Pipes of Distribution Headers of Superheater and Reheater

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