Large-sized grate firing pressurized phase inversion heat-exchanging hot water boiler

Abstract

The invention relates to a large grate firing, pressure, phase transition and heat exchange hot water boiler, which can be widely applied in the industrial field of large-scale centralized heat supply. The hot water boiler is composed of a longitudinal boiler barrel, a crossbar container, a communication pipe, a wall pipe, a waterwall, a convection bank and a heat exchanger; the boiler body is compact in structure with strong integrity, which greatly reduces the steel support of the non-heating surface; the water channel of the heat exchanger characterized by multipass and non-clapboard is perfectly matched with the boiler; the water circulation in the boiler is uniformly descended or ascended by automatic adjustment; the dust in the boiler is subsided by gravitation after a plurality of times of capacity expansion and deceleration, and then the dust is separated by inertia in a multipass flow, in this way, the initial emission concentration of dust is greatly reduced; the vertical arrangement of the convection bank and transverse scouring greatly reduce the heating surface and lower the heat resistance and flow resistance. By adopting a full membrane water wall, the hot water boiler of the invention has a long flow of dust, good heat exchange effect and high heat availability. Besides, the hot water boiler is characterized in that the boiler is free from scaling, oxygen corrosion and pollution discharging, and free from using a water softening plant or a de-oxygenization device. Therefore, the boiler of the invention is a centralized heating boiler characterized by remarkable high efficiency, energy and water conservation, power consumption reduction, and carbon emission reduction.

Description

technical field [0001] The present invention relates to four major boiler series, that is, large-scale layer-fired pressure phase-change hot water, natural circulation hot water, steam and heat and power cogeneration boilers, and especially relates to a layer-fired pressure phase boiler for large-scale central heating. Change hot water boiler. Background technique [0002] There are many types of large-scale central heating hot water boilers currently popular in the market. Although there are differences, they all have common shortcomings. One is that the water quality requirements are relatively high. Once scale is generated, the lighter ones will increase thermal resistance and reduce thermal efficiency , In severe cases, violent tube accidents occur. Therefore, expensive water softening equipment and chemicals are required, strict water quality testing is required, and regular sewage discharge is required, which not only increases initial investment and operating costs, ...

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Problems solved by technology

[0004] Most of the phase-change hot water boilers sold in the market are used in small pressureless boilers. Due to the technical defects of the water return structure of the heat exchanger, that is, the multi-return water channels are separated by partitions in one drum. , so that the reliability of manufacturing quality is reduced, and it is difficult to overhaul and repair. Due to the small temperature difference between the saturation temperature and the low temperature without pressure, the heating surface required is increased, and the cost of the heat exchanger that has already increased is greatly increased. Therefore, the original It has the performance advantage of phase change heat, but loses the market competitive advantage, and it is more difficult to realize the large-scale phase change heat

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