Condenser for boiler tail gas

Abstract

The invention provides a condenser for boiler tail gas. The condenser comprises a square supporting frame, wavy heat exchange fins, cooling water pipe components, a water inlet manifold and a water outlet manifold, wherein the supporting frame comprises a front end plate, a rear end plate, an upper top plate and a lower bottom plate; the cooling water pipe components comprise a plurality of straight pipes arranged side by side and U-shaped connectors for connecting the straight pipes in series; round holes allowing the straight pipes to be inserted therein are arranged in the heat exchange fins; the heat exchange fins are overlapped together and vertically placed in the supporting frame; strip-shaped holes allowing the cooling water pipe components to penetrate out are arranged in the endplates; the cooling water pipe components are sequentially arranged in the height direction of the supporting frame; the water inlet ends of the cooling water pipe components are communicated with thewater inlet manifold; the water outlet ends of the cooling water pipe components are communicated with the water outlet manifold; and the lower bottom plate is connected to a condensate water discharging pipe. According to the condenser, a heat exchange material is made of corrosion-resistant stainless steel with a high finned ratio, the steel consumption is reduced by 50% or above compared witha common spiral finned tube heat exchanger, the specially-designed sine wave heat exchange fins are integrally formed in a three-dimensional mode at a time, heat transfer is enhanced at the gas side,the character of the heat exchange fin is more beneficial to condensate discharge, and high efficiency and energy saving are achieved.

Description

technical field [0001] The invention belongs to the technical field of boiler tail gas treatment and relates to a boiler tail gas condenser. Background technique [0002] The design exhaust gas temperature of most gas (oil) hot water boilers used in China is above 160°C, while that of steam boilers is as high as 220°C. This is to avoid acidic substances such as sulfur contained in the fuel and NOx compounds produced during the combustion process. When the temperature is less than 150°C, it will produce acid condensation at the tail of the heating surface and corrode the tail heating surface, reducing the strength of the tail heating surface and causing harm. The safe operation of the boiler makes the boiler scrapped in advance. Therefore, the design exhaust temperature of domestic and foreign conventional oil-fired gas boilers is generally higher than 160°C, and the thermal efficiency is generally 86-90%. Caused a large amount of flue gas sensible heat and latent heat to b...

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Problems solved by technology

But this kind of fin dissipates heat slowly, resulting in poor condensation effect

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