A device for preventing chimney rain and gypsum rain by heating the inner wall of wet chimney with integrated heat preservation block

Abstract

The invention discloses a chimney rain and gypsum rain prevention device for heating wet chimney inner cylinder wall through integrated heat insulation blocks. The device comprises the integrated heat insulation blocks laid on the surface of the outer wall of an inner cylinder of a chimney, temperature sensors, microcomputer controllers and integrated heat insulation block power sources, wherein the temperature sensors, the microcomputer controllers and the integrated heat insulation block power sources are arranged on the outer wall of the inner cylinder of the chimney; the temperature sensors are connected with the microcomputer controllers; the microcomputer controllers are connected with the integrated heat insulation block power sources; the integrated heat insulation block power sources are connected with the integrated heat insulation blocks. The chimney rain and gypsum rain prevention device for heating the wet chimney inner cylinder wall through the integrated heat insulation blocks can basically eliminate condensate generated on the wall of the inner cylinder when smoke sends out heat due to temperature differences between the smoke and the wall of the inner cylinder and between the smoke and the external environment, and effectively reduce the liquid drop content in the smoke and the condensate re-entrainment phenomenon, thereby effectively solving the phenomena such as the chimney rain, the gypsum rain and the acid mist settlement beside the chimney.

Description

Technical field [0001] The invention relates to the field of chimneys, in particular to a device for preventing and controlling chimney rain and gypsum rain with an integrated thermal insulation block to heat the inner wall of a wet chimney. Background technique [0002] The current wet desulfurization process commonly used in thermal power plants without a flue gas heating system makes the temperature of the flue gas discharged into the chimney around 50 ℃, and the wet flue gas is easy to condense and form droplets during the discharge process, which is not only very corrosive to the chimney It is strengthened, and if it is not effectively lifted, it will diffuse into the atmosphere. Some of the large droplets that are too late to diffuse and evaporate will fall to the ground around the chimney. These settled droplets are acidic and contain a certain amount of SO 2 , SO 3 And gypsum slurry, etc., will cause certain corrosion to equipment, facilities and buildings in the settleme...

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Problems solved by technology

For example, the device disclosed in the Chinese patent with the patent number "201220569152.X" and the patent name "wet flue gas flue condensate collection device", but this device cannot fundamentally reduce the condensation caused by the temperature difference between the external environment and the flue gas Liquid volume

[0007] However, the above-mentioned methods have high technical risks, and some are only in the research and experiment stage. Whether they can be applied to large-capacity power plant boilers remains to be practiced, and it cannot fundamentally eliminate the "chimney rain" and "gypsum rain" caused by low flue gas temperature. Phenomenon

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