Heat exchange fins and membrane heat exchange plates for heat exchangers

Abstract

The invention discloses a heat exchange fin for a heat exchanger and a film type heat exchange plate. The heat exchange fin comprises a bottom plate, a top plate and two round pipes, and the two round pipes are arranged in parallel, and long grooves are formed in the two round pipes in the axial direction. The top plate and the bottom plate are oppositely arranged; and the two sides of the bottom plate are connected with the bottom sides of the long grooves of the two round pipes respectively, and the two sides of the top plate are connected with the top sides of the long grooves of the two round pipes respectively. The film type heat exchange plate comprises a plurality of heat exchange fins and a plurality of fluid pipes; the heat exchange fins are arranged side by side, and the fluid pipes are arranged on the outer sides of the two round pipes of each heat exchange fin; and the fluid pipes are sequentially communicated. The heat exchange fin is novel in structure, the heat transfer performance can be effectively improved, and the heat exchange effect is strengthened. The film type heat exchange plate strengthens streaming of smoke, improves the heat transfer efficiency of a heat exchanger, prevents the fluid pipes of the heat exchanger from being directly scoured by the smoke, and prolongs the service life of the heat exchanger.

Description

technical field [0001] The invention relates to a heat exchange fin and a membrane heat exchange plate used in a heat exchanger. Background technique [0002] In coal-fired units, the boiler exhaust heat loss accounts for a large proportion of all heat losses, and reducing the boiler exhaust heat loss can greatly improve the boiler thermal efficiency. Generally, the exhaust gas temperature of thermal power unit boilers is relatively high, about 110°C to 160°C, so reducing the exhaust gas temperature can effectively reduce the heat loss of exhaust gas. Usually, a heat exchanger (commonly called a low-temperature economizer) can be installed in the low-temperature area of ​​the flue at the tail of the boiler, and the heat of the flue gas can be recovered by increasing the heating surface at the tail of the boiler to reduce coal consumption. [0003] The heat transfer deterioration caused by low heat transfer efficiency and fouling on the heat transfer surface is a common chro...

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Problems solved by technology

[0004] At the same time, regardless of industrial boilers or power plant boilers, there are different degrees of low-temperature corrosion problems on the rear heating surface, which directly affects the reliability and economy of the operation of the boiler protection equipment.

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