Horizontal natural gas fired hot-water boiler

Abstract

The invention discloses a horizontal natural gas fired hot-water boiler, which comprises burners, a furnace chamber, a flue and a coal economizer, wherein the furnace chamber has a full-membrane type wall sealed structure consisting of a front water cooled wall, a side water cooled wall and a back water cooled wall; two burners are arranged at the front water cooled wall; two rows of boiler slag screens are arranged on the back water cooled wall at a furnace chamber outlet through which flue gas passes; a high-temperature stage convection bank is arranged behind the two rows of the boiler slag screens; a sealing device is arranged behind the high-temperature stage convection bank; the sealing device is welded with an expansion joint; the expansion joint is welded with the flue; the flue is connected with the coal economizer; an outlet water collection box of the coal economizer is connected with a lower collection box of the front water cooled wall; an upper collection box of the front water cooled wall is connected with an upper collection box of the side water cooled wall through a connection pipe; the upper collection box of the side water cooled wall is connected with an inletwater collection box of the convection bank through a connection pipe; an outlet water collection box of the convection bank is connected with a hot water outlet pipe; and an inlet water collection box and an outlet water collection box of the coal economizer, and the inlet water collection box and the outlet water collection box of the convection bank are vertically arranged outside the flue. The horizontal natural gas fired hot-water boiler is reasonable in design and simple in structure, is horizontal, does not have a boiler drum, is low in metal consumption and simple in manufacturing, and the boiler heat efficiency is more than or equal to 94 percent.

Description

Technical field: [0001] The invention relates to a natural gas-fired hot water boiler. Background technique: [0002] Conventional large-capacity natural gas-fired hot water boilers usually adopt a Π-shaped structure with a drum on the top. The product design cost is high, the manufacturing cycle is long, and the thermal efficiency of the boiler design is about 90%. At the same time, the owner's investment cost is also high. Invention content: [0003] The object of the present invention is to provide a horizontal natural gas fired hot water boiler without a drum. [0004] Product structure scheme of the present invention is: [0005] A horizontal natural gas-fired hot water boiler, including a burner, a furnace, a flue, and an economizer. It is characterized in that: the furnace adopts a full-membrane wall sealing structure composed of a front water wall, a side water wall, and a rear water wall. The two burners are arranged at the front water-cooled wall, and the rear ...

AI Technical Summary

Problems solved by technology

[0002] Conventional large-capacity natural gas-fired hot water boilers usually adopt a ∏-shaped structure with a drum on the top. The product design cost is high, the manufacturing cycle is long, and the thermal efficiency of the boiler design is about 90%. At the same time, the owner's investment cost is also large.

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