Large-scale modular assembly of high-efficiency condensing gas-fired hot water boilers

Abstract

The invention relates to a large-module assembled high-efficiency condensing gas-fired hot water boiler, which is characterized in that the boiler is divided into a hearth zone (100), a convection heating surface (200) and an economizer (300), the hearth zone (100) is arranged on the right side of the convection heating surface, the economizer (300) is arranged on the left side of the convection heating surface, the overall structure of the convection heating surface (200) is a dual-drum longitudinally-arranged D-shaped arrangement structure and comprises an upper drum (201), a lower drum (202), a convection tube bundle (203) and a convection heating surface full-membrane wall, and the convection tube bundle (203) is arranged between the upper drum (201) and the lower drum (202); the hearth zone (100) comprises a hearth zone upper header (101), a hearth zone lower header (102) and a hearth zone membrane wall; the economizer (300) is divided into a high-temperature section and a low-temperature section, the high-temperature section is a conventional heat exchange zone and the low-temperature section of the economizer is a condensing zone. The large-module assembled high-efficiency condensing gas-fired hot water boiler provided by the invention has the advantages that the thermal efficiency can reach 96 percent and is improved by 5 percent on the basis of the thermal efficiency of the original corresponding boiler, and the boiler resistance is controlled to be basically unchanged.

Description

technical field [0001] The invention relates to a fuel (gas) hot water boiler. It belongs to the technical field of heating equipment. Background technique [0002] In order to meet the requirements of sustainable development of the national economy and environmental protection, coal-based fuels have been gradually changed to oil and gas-based fuels. Oil and gas fuels are easy to transport and use. Under good combustion conditions, there is basically no environmental pollution and high calorific value, which makes oil and gas boilers realize automatic operation and high efficiency. In recent years, fuel-fired gas-fired boilers have been widely developed and used due to their small size, high degree of automation, easy installation, and convenient and flexible application under various heat media. [0003] In traditional oil-fired gas-fired boilers, due to flue gas resistance, low-temperature corrosion and other reasons, the exhaust gas temperature of the boiler is designed...

AI Technical Summary

Problems solved by technology

[0005] my country's condensing boilers are still basically in a blank state or in the initial stage. The main reason is that my country's lack of understanding of condensing boilers is an important reason, and the other reason is that manufacturers do not do enough to promote and develop condensing boilers.

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