water spray desuperheater

Abstract

The invention relates to a water spraying temperature reducer, which comprises a spray nozzle, a spray nozzle first flange, a spray nozzle first atomization sleeve, a spray nozzle second flange, an inserting pipe and a steam pipe section, wherein the spray nozzle first atomization sleeve is arranged on the spray nozzle, atomization spray openings with the same number as water spray holes are formed in the spray nozzle first atomization sleeve, the axial center line of each atomization spray opening is coincident with the axial center line of the corresponding water spray hole, on the basis of the water spraying temperature reducer, an atomization grid, an evaporation pipe and a drain pipe are additionally arranged, and the water spraying temperature reducer with different efficacies can be formed. The water spraying temperature reducer has the beneficial effects that the serious defects in the prior art are overcome, the cooling water vaporization rate is improved, and the safety of equipment and steam pipelines is improved.

Description

technical field [0001] The invention relates to the technical field of steam desuperheaters, in particular to a water spray desuperheater. Background technique [0002] The water spray desuperheater is a desuperheating device that sprays cooling water directly into the superheated steam flow passing through the steam pipe. The principle is: when the cooling water is mixed into the superheated steam, it will absorb heat from the superheated steam and turn it into steam, and the superheated steam will reduce the temperature from the original high temperature point to a certain low temperature point due to the heat release, so as to achieve superheating. The purpose of steam desuperheating. If the cooling water is sprayed into the superheated steam pipe as very fine water droplets or mist, the cooling water and the superheated steam are mixed more uniformly by the steam flow. The water spray desuperheater is characterized by simple structure, large temperature adjustment rang...

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Problems solved by technology

[0004] According to "Research on Desuperheater of Atomizing Nozzle" ("Power Plant Auxiliary Machinery" 1992 Issue 03, Zhang Shiyong of Dongfang Steam Turbine Factory), "Improvement of Reheating Steam Nozzle Desuperheater" ("Jilin Electric Power" 1996 Issue 06 Changshan Power Plant Ning Wenju, Wang Zhongcai), "Spray desuperheater throat structure" (CN203628624U), "350MW tangential combustion supercritical boiler reheater desuperheater" (CN202452476U), "Overall regulation and water spray According to relevant materials such as "Steam Desuperheater" (CN101907290A) and the technical scheme disclosed in the above-mentioned US invention patent application, there are two serious defects in the prior art of water spray desuperheater: one is that the cooling water vaporization rate is low— —When the cooling water leaves the nozzle, it enters into the superheated steam flow in the shape of a truncated cone, and instantly creates a situation of more water and less steam in the middle of the truncated cone. Therefore, more cooling water settles to a low place in the steam flow before it can absorb heat and vaporize. On the inner wall of the steam pipe, the steam pipe is discharged along the drain pipe; second, the cooling water that fails to absorb heat and vaporize is sprayed on the inner wall of the steam pipe, which will not only affect the service life of the steam pipe, but also easily cause water inflow and water hammer of the equipment Vibration and other serious accident hazards

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