Corner tube type forced circulating coal powder burning hot water boiler

Abstract

The invention discloses a corner tube type forced circulating coal powder burning hot water boiler. The corner tube type forced circulating coal powder burning hot water boiler comprises a boiler body; a combustion chamber and a heating chamber are formed in the furnace body; a vertical film type water cooling screen is arranged between the combustion chamber and the heating chamber and used for separating the combustion chamber and the heating chamber; a coal powder combustor is arranged at the upper end of the combustion chamber; a snake-shaped pipe convection heating surface is arranged in the heating chamber; film type water cooling walls are distributed on the inner walls of the combustion chamber and the heating chamber; a secondary air structure is arranged in the middle part of the combustion chamber. According to the boiler, the combustion heat can be effectively absorbed; the heat can be effectively absorbed and utilized through the film type cold water wall, the film type water cooling screen and the snake-shaped pipe, so that the heat utilization rate and the heat supply efficiency can be increased, and the heat supply cost can be reduced; a U-shaped flame and smoke channel is adopted, so that the flame length can be effectively utilized; the secondary air structure is adopted, thus the heat efficiency of the boiler can be increased, the generated nitric oxide can be reduced, and the energy saving and environmental protection performances of the boiler can be improved; in addition, the boiler is compact in structure and needs a small place.

Description

technical field [0001] The invention relates to a hot water boiler, in particular to a corner tube forced circulation coal pulverized hot water boiler. Background technique [0002] Hot water boilers use fuel combustion to heat water to provide hot water or heat buildings. The utilization rate of hot water boilers to fuel combustion heat has become an important performance of hot water boilers. The high heat utilization rate can not only increase the thermal power of the hot water boiler, but also improve the fuel utilization rate, reduce fuel consumption and heating cost. However, the existing hot water boilers have poor design for the combustion flue, and the absorption and utilization rate of heat in the flue gas is low, which is not conducive to improving the performance of the boiler and reducing the cost. Existing boilers often adopt a simple heat exchange structure in the heat absorption structure, which reduces the heat absorption efficiency of flue gas and flame, ...

AI Technical Summary

Problems solved by technology

However, the existing hot water boilers are poorly designed for the combustion flue, and the absorption and utilization rate of heat in the flue gas is low, which is not conducive to improving the performance of the boiler and reducing the cost

Existing boilers often adopt a simple heat exchange structure in the heat absorption structure, which reduces the heat absorption efficiency of the flue gas and flame, resulting in the defects of low heating efficiency and low fuel utilization rate of the boiler

[0003] At the same time, the existing boilers are arranged horizontally, which occupies a large area, which is not conducive to improving the efficiency of land use

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