Modular extrusion aluminum condensation heat exchanger and condensation boiler

Abstract

The invention discloses a modular extrusion aluminum condensation heat exchanger and condensation boiler. According to the opposite arrangement of a burner and the extrusion aluminium condensation heat exchanger, the single, left-right or upper-lower split condensation boiler is formed, and the condensation boiler is composed of extrusion aluminium heat transfer units, an inlet gradually expandingflue, a dew tray, an inlet header, an outlet header and the fully premixed fire exhaust burner; after extrusion forming, an aluminium rod becomes the extrusion aluminium heat transfer unit with complete waterways by the secondary machining and assembly, and the extrusion aluminium heat transfer units are combined into the condensation heat exchanger or a main part of the condensation boiler; a combustion head of the fully premixed fire exhaust burner extends between the extrusion aluminum heat transfer units to avoid the deformation and leakage of a sealing cover plate caused by flame erosion; extrusion aluminium has the advantages of high tensile strength, low density and corrosion resistance, and the cost of the extrusion aluminium is only 30% that of cast aluminium-silicon and 60% thatof stainless steel; and according to the surplus design of the extrusion aluminium heat transfer units, the efficiency of the boiler is improved by more than 6%, energy and gas are saved, and the shortage of natural gas is alleviated.

Description

technical field [0001] The invention relates to the technical field of oil-fired gas boiler and flue gas waste heat recovery, in particular to a modular condensing gas-fired boiler using extruded aluminum as a material and a modular condensing heat exchanger for recovering latent heat from the tail gas of the fuel-fired gas boiler. Background technique [0002] To solve the huge shortage of heating natural gas, on the one hand, open source, on the other hand, reduce expenditure. Throttling requires increasing the efficiency of natural gas boilers to save natural gas. The current central heating natural gas boiler can only realize the condensation of flue gas when the return water temperature is low (below 58°C), and utilize the latent heat of water vapor in the flue gas. When used for radiator heating, the return water temperature is generally above 60°C, relying on boiler return water can no longer achieve flue gas condensation, resulting in a huge waste of latent heat of ...

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Problems solved by technology

[0005] In order to reduce the cost of the flue gas condensing heat exchanger and promote the development of waste heat recovery technology for fuel gas boilers, the purpose of the present invention is to provide a modular extruded aluminum condensing heat exchanger and an integrated extruded aluminum condensing boiler, The invention solves the problems that the flue gas condensation heat exchanger is easy to corrode, high in cost, and occupies a large area. By introducing a variety of cold sources such as heat pumps and domestic water, the waste heat of the flue gas is recycled, and the water vapor in the flue gas is c

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