Boiler water wall and boiler

Abstract

The invention discloses a boiler water cooled wall and a boiler. The boiler water cooled wall comprises a plurality of water cooled wall pipes (1) extending in parallel; on the side, facing the interior of a hearth, of the boiler water cooled wall, first fins (3) are arranged on at least part of the water cooled wall pipes (1), are fixed on one sides of the middle planes (A) of the water cooled wall pipes (1), and extend along the pipe walls of the water cooled wall pipes (1) in the longitudinal direction; and each of the first fins (3) and the pipe wall of the corresponding water cooled wall pipe (1) form an obtuse angle beta, the pipe wall is positioned on the side, deviating from the middle plane (A), of the first fin (3), and the middle plane (A) extends along the middle of the corresponding water cooled wall pipe (1) in the longitudinal direction and is perpendicular to the boiler water cooled wall. The boiler water cooled wall and the boiler can effectively prevent abrasion of the lateral surface areas of the water cooled wall pipes, are low in cost, and less affect the heat exchanging efficiency of the water cooled wall pipes.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to a boiler water wall and a boiler. Background technique [0002] Circulating fluidized bed is a new generation of high-efficiency, low-pollution and clean combustion technology developed internationally in recent years, and it has been rapidly commercialized internationally. However, because the particle size of the coal it burns is 0-9mm, and it is the bottom air supply mode, the ash particles carried by the high-temperature flue gas wear more seriously on the heating surfaces of the boiler than the pulverized coal furnace, especially the circulating flow. The wear of the water-cooled wall tubes of the chemical bed boiler is particularly prominent. The wear of the water-cooled wall tubes will cause the wall of the water-cooled wall tubes to thin and even burst, which directly affects the safe operation of the boiler. [0003] The specific process of water wall tube wear is as fo...

AI Technical Summary

Problems solved by technology

This will reduce the heating surface of the boiler, which will cause the boiler bed temperature to rise, which will have a great impact on the safe operation of the boiler and environmental protection emissions, and the design and installation costs are high

[0008] The above-mentioned first and second anti-wear measures did not solve the problem of the wear of the water-cooled wall tube by the vortex flow of the flue gas flow at the water-cooled wall. Although the third anti-wear measure can prevent the water-cooled wall from forming a wall-attached flow to a certain extent, And then prevent it from forming a vortex flow, but there are defects as mentioned above

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