Curved surface hearth of natural gas burning boiler

Abstract

The invention provides a curved surface hearth of a natural gas burning boiler. The curved surface hearth comprises a burner and a boiler body with a water-cooling membrane wall, wherein an installation guide pipe is fixedly arranged on the front side of the boiler body; a tail corrugated membrane wall is vertically arranged on the rear side in the boiler body; a top corrugated membrane wall is horizontally arranged in the boiler body; a tail water-cooling wet back flue is formed between the rear side of the tail corrugated membrane wall and the water-cooling membrane wall on the rear side ofthe boiler body; a top horizontal channel is formed between the top of the top corrugated membrane wall and the water-cooling membrane wall on the top of the boiler body; a smoke steering channel communicating with the front side of the top horizontal channel is formed between the front side edge of the top corrugated membrane wall and the water-cooling membrane wall on the front side of the boiler body; and the burner is arranged in the installation guide pipe. According to the curved surface hearth, the flowing time of smoke in the boiler is prolonged, meanwhile, the heating area can be multiplied in unit space through the corrugated water-cooling membrane walls, the boundary layer of the smoke can be well damaged through the design of the corrugated structure, the function of enhancingheat transfer is achieved, more heat can be absorbed, and the heat of the high-temperature smoke coming out of the hearth can be reduced.

Description

technical field [0001] The invention belongs to the technical field of boiler energy saving and environmental protection, and in particular relates to a curved furnace of a natural gas-fired boiler. Background technique [0002] With the in-depth advancement of my country's "coal to gas" policy, natural gas boilers are also gradually moving from small tonnage to large tonnage boilers. One of the assembled boilers is the SZS type quick assembly. This kind of boiler is assembled in the boiler manufacturer. Then transported to the site, the user’s water and electricity can be used immediately, the installation time is short, the cost is low, and the product quality is high. After adopting the full-membrane wall structure, the boiler leakage rate is low, the boiler thermal efficiency is high, and the boiler load capacity is strong. Based on the above Advantages, the SZS-type natural gas-fired boiler has a good development prospect in the market. [0003] The typical structure of ...

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Problems solved by technology

[0004] In the process of enlarging the D-type boiler, because the structure of the boiler is too compact, the convection tube bundle and the furnace of the boiler cannot be too large, and after the boiler tonnage becomes larger, the quality requirements of the boiler steam are also high, but it is used to connect The upper and lower drums of the convection tube bundle should not be too large, so that if the steam quality of the boiler is to be improved, the diameter of the upper drum must be increased, and because it is delivered as a whole, the transportation size also limits the increase in the volume of this D-type boiler. Convection tube bundles, furnaces, boiler drums, and transportation restrictions have led to technical contradictions in the process of enlarging the D-type boiler, and the contradiction between the large-scale requirements of the boiler and the inability to arrange too many heating surfaces under the existing structure

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