Method for arranging water-cooled wall of vertical pipe panel of internal thread pipe with non-uniform caliber

Abstract

The invention relates to a method for arranging a water-cooled wall of a vertical pipe panel of an internal thread pipe with a non-uniform caliber, which is characterized in that a one-rising water-cooled wall of a vertical pipe panel is adopted, and the vertical pipe panel adopts an internal thread pipe with a non-uniform caliber; the vertical pipe panel is divided into a plurality of sets of water-cooled wall pipe panels in the width or depth direction of a furnace, and each set of water-cooled wall pipe panels comprises internal thread pipes with the same average internal diameters; according to the specific condition, the width of each set of water-cooled wall pipe panels ranges from 1 to 8 m; and in each set of water-cooled wall pipe panels, the difference between the maximum or minimum flow of each internal thread pipe and the average flow cannot be higher than 5% of the average flow. According to the invention, a throttle washer at the lower part of the traditional water-cooled wall is canceled, and the working medium in the pipe is at middle or low quality flow velocity so that the pressure drop of the water-cooled wall and the power consumption of the water pump are reduced, and the operating cost of a boiler is saved.

Description

technical field [0001] The invention relates to a method for arranging a water cooling wall of a boiler, in particular to an arranging method for a water cooling wall of a vertical tube panel of an inner threaded pipe with a non-uniform pipe diameter. Background technique [0002] my country's primary energy consumption is dominated by coal, and coal-fired power generation accounts for about 75% of the total power generation. Since electric power is the largest coal user, ensuring the safe operation of coal-fired power plant boilers and reducing water-wall tube burst accidents caused by thermal deviations is a major way to improve coal utilization. At present, my country's power stations are developing towards high-parameter, large-capacity and large-scale ultra-supercritical units. Regardless of the four-corner tangential combustion method, the swirl combustion method, or the front and rear wall confrontation combustion method, the problem of uneven heat load distribution ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to reduce the maintenance cost of the boiler and the complexity of the boiler operation, and at the same time take into account the safety of the furnace hydrodynamics, and provide a boiler water-cooled boiler that is easy to install and maintain, low-cost to operate, and requires low operation. wall arrangement

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