Modularized multi-boiler-barrel longitudinal boiler structure

Abstract

The invention relates to the technical field of boilers, in particular to a modularized multi-boiler-barrel longitudinal boiler structure. The modularized multi-boiler-barrel longitudinal boiler structure comprises an upper boiler barrel, the steam outlet end of the upper boiler barrel is connected with one ends of N steam-water outlet pipes respectively, N is larger than or equal to 2, the other ends of the N steam-water outlet pipes are connected with the water inlet ends of two convection modules respectively, and the water outlet ends of the left side and the right side of each convection module are connected with one ends of two downcomers respectively; and the water return end of the upper boiler barrel is connected with one end of a centralizing pipe, the other end of the centralizing pipe is connected with one ends of two dispersing pipes, the other ends of the two dispersing pipes are connected with the steam outlet ends of two hearth modules respectively, combustors are arranged in the hearth modules, and the steam inlet ends of the two sides of each hearth module are connected with the other ends of the two downcomers respectively. A hearth and a convection bank film are modularly designed, the problem that transportation of a single upper boiler barrel is limited is solved, and the rated evaporation capacity of a boiler is greatly improved; and the double-hearth module is adopted, so that the thermal load of a single hearth is reduced, the generation of nitrogen oxides is inhibited, and more powerful, environment-friendly and combustion are realized.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to a modular multi-drum vertical boiler structure. Background technique [0002] For a long time, my country's energy consumption has been dominated by coal. With the advancement of modernization, more and more frequent smog, acid rain, greenhouse effect and other extreme weather have reflected the disadvantages of using coal as fuel, and promoted the energy transformation of society. The idea of ​​energy consumption from coal to gas. Existing oil and gas upper drums, low-parameter and small-capacity WNS steam upper drums, can also be double-drum vertical chamber burners, or pure bulk Π-shaped structure, bulk upper drums need to be installed on site For installation, the installation period is long, the welding workload on site is large, and the labor consumption is high. The development structure of the existing SZS upper drum is a furnace consisting of a membrane wall on one side...

AI Technical Summary

Problems solved by technology

[0003] The double-drum vertical chamber-burning furnace is limited by the structural mode. The arrangement of the upper drum of this type is too compact, and the radiation heating surface of the furnace of the upper drum and the convection heating surface of the second channel cannot be too large. As the rated pressure rises, the requirements for the steam in the upper drum will be further increased, which will inevitably require a larger drum and more space to improve the quality of steam

The transportation size and on-site installation workload limit the height of the upper drum and the diameter of the drum

Moreover, the drum of the double-drum vertical chamber burner is due to the volumetric heat load of the radiated heating surface, the structural form, the diameter of the drum is larger, and the weakening coefficient of the hole bridge is smaller, so the wall thickness of the drum is increased to meet the strength. Requirements, and when the wall thickness of the drum exceeds the heat treatment limit of GB / T16507 "Water Pipe Upper Drum", the overall heat treatment of the upper drum is required, which not only increases the processing cost, but also restricts the upper drum due to the structural size of the heating furnace. The size of the structure should not be too large

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