Flexible belt type demisting device

Abstract

The invention relates to the technical field of flue gas purification, in particular to a flexible belt type demisting device which is of a belt-shaped structure, a hollow water inlet main pipe (11) is arranged at the water inlet end of the belt-shaped structure, and a hollow water outlet main pipe (12) is arranged at the water outlet end of the belt-shaped structure; a plurality of flexible heat exchange pipes (2) are arranged between the water inlet main pipe(11) and the water outlet main pipe (12) in parallel; a plurality of weft rods (3) are arranged in parallel in the width direction of the belt-shaped structure; the heat exchange pipes (2) alternately penetrate through the upper portions and the lower portions of the adjacent weft rods (3), or the weft rods (3) alternately penetrate through the upper parts and the lower parts of the adjacent heat exchange pipes(2); and a pipe piece is formed by the strip-shaped structure with a certain length, and fluid enters from the water inlet main pipe (11) at the water inlet end of the pipe piece, passes through the heat exchange pipes (2) and flows out from the water outlet main pipe (12) at the water outlet end of the pipe piece.

Description

technical field [0001] The invention relates to the technical field of flue gas purification, in particular to a flexible belt-type demisting device. Background technique [0002] Wet desulfurization devices are installed in the flue gas discharge of coal-fired boilers such as sintering machines in former iron and steel plants and thermal power plants to remove SOx dust and other pollutants in the flue gas. The country also has very strict emission standards, but wet The spraying and other processes of the desulfurization device will cause the water vapor content in the flue gas to reach saturation, and it will condense when it is cold. At the same time, a large number of small diameter droplets will be entrained, and the solid particles below Pm5 will be discharged into the atmosphere together. It is difficult to achieve ultra-clean Emission standards, in addition, in economically developed areas, the density of thermal power plants is very high, even if they meet the requi...

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Problems solved by technology

[0002] Wet desulfurization devices are installed in the flue gas discharge of coal-fired boilers such as sintering machines in former iron and steel plants and thermal power plants to remove SOx dust and other pollutants in the flue gas. The country also has very strict emission standards, but wet The spraying and other processes of the desulfurization device will cause the water vapor content in the flue gas to reach saturation, and it will condense when it is cold. At the same time, a large number of small diameter droplets will be entrained, and the solid particles below Pm5 will be discharged into the atmosphere together. It is difficult to achieve ultra-clean Emission standards, in addition, in economically developed areas, the density of thermal power plants is very high, even if they meet the requirements of ultra-clean standards, it will still cause pollution in some areas, so some power generation units in the Pearl River Delta and Yangtze River Delta have proposed 1mg / Nm 3 Self-discharge requirements, which put forward higher technical requirements for the demisting device

[0003] Conventional wet electrostatic precipitators and baffle-type mist eliminators cannot meet the above requirements. Although the wire mesh demister can meet the above parameter requirements, due to the low porosity, the smoke resistance is very large, and the wire mesh is easy to Fouling and hardening cause unit failure and shutdown, making it difficult to meet the safety requirements of basic energy facilities such as thermal power plants

[0004] Although the flue gas condensers that have emerged on the market in recent years can well realize the function of condensing and eliminating white smoke, due to the limited structure, it is difficult to meet the above emission standards, generally only 5-10mg / Nm 3 emission concentration

In order to control the flow rate of the flue gas and reduce the entrainment of liquid droplets to the chimney, the cross-sectional area of ​​the heat exchanger has to be designed to be very large, resulting in problems such as difficulty in flue reconstruction, large engineering volume, and high engineering cost.

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