Novel three-return-stroke water tube boiler

Abstract

The invention discloses a novel three-return-stroke water tube boiler. The novel three-return-stroke water tube boiler comprises a first return stroke hearth, a second return stroke structure, a third return stroke structure, a smoke outlet channel, a supporting steel frame, a middle boiler barrel, an upper boiler barrel and a lower boiler barrel, wherein the lower boiler barrel and the middle boiler barrel are arranged on the supporting steel frame, the lower boiler barrel is located below the middle boiler barrel, a hearth front membrane type wall, a hearth rear membrane type wall, a right membrane type wall and a middle membrane type wall are arranged on the inner wall of the first return stroke hearth, and the hearth front membrane type wall, the hearth rear membrane type wall, the right membrane type wall and the middle membrane type wall communicate with the middle boiler barrel and the lower boiler barrel; and the second return stroke structure comprises a convection bank, a convection bank rear membrane type wall, a smoke channel front membrane type wall and a left membrane type wall, the convection bank, the convection bank rear membrane wall, the smoke channel front membrane wall and the left membrane wall communicate with the middle boiler barrel and the lower boiler barrel. According to the novel three-return-stroke water tube boiler, the heat energy utilization rate is high, modular delivery of the boiler is achieved, transportation is convenient, assembling is rapid, steel consumption is reduced, and the occupied area is reduced.

Description

technical field [0001] The invention relates to the technical field of fuel gas boilers, in particular to a novel three-pass water tube boiler. Background technique [0002] A boiler is a device that uses coal, oil, natural gas, biomass and other fuels to generate heat through combustion to generate steam or hot water. It belongs to an energy conversion device. In recent years, due to increasingly serious environmental protection problems, coal-fired boilers have gradually been replaced by fuel-fired gas boilers, and fuel-fired gas water tube and fire tube boilers have been vigorously developed. Among them, the oil-fired gas-fired water-tube boiler is widely recognized by the public because of its structural safety superior to that of the oil-fired gas-fired fire-tube boiler. Existing large-scale fuel-fired gas-fired water-tube boilers usually adopt a two-pass structure, but this structure is not used in actual manufacturing and use. There are also many disadvantages in the...

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Problems solved by technology

Among them, the oil-fired gas-fired water-tube boiler is widely recognized by the public because of its structural safety superior to that of the oil-fired gas-fired fire-tube boiler. There are also many disadvantages in the process, such as: 1. The efficiency of the two-pass water tube boiler is low in terms of heat energy utilization; On the one hand, the user unit needs to assemble the bulk spare parts on site, the construction period is too long, and the installation cost is too high. At the same time, because the two-pass water tube boiler needs to be fixed with a steel frame, the steel consumption increases, resulting in waste of steel resources; 4. In use On the one hand, the boiler occupies a large area, resulting in waste of land resources

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