Boiler smoke and steam energy-saving low-carbon haze reducing system

Abstract

The invention relates to a boiler smoke and steam energy-saving low-carbon haze reducing system. The boiler smoke and steam energy-saving low-carbon haze reducing system comprises a boiler smoke and steam energy-saving micro-emission device, a condensate water recycling device and a condensate water treatment system. The boiler smoke and steam energy-saving micro-emission device is used for treating smoke exhausted by a boiler in a heat exchange manner, the water content in the smoke is reduced, smoke and steam micro emissions are achieved, four-phase dividing of steam condensation, smoke exhausting, condensate water extraction and dust deposition is achieved in the heat exchange process, and extracted condensate water is supplied into the condensate water recycling device through a condensate water drainage pipeline. The condensate water recycling device is used for collecting the condensate water extracted by the boiler smoke and steam energy-saving micro-emission device and supplying the condensate water into the condensate water treatment system. The condensate water treatment system is used for further treating the acidic condensate water, and the discharge or reusing standardis met. According to the system, steam in the smoke can be effectively condensed and exhausted, gasification latent heat of the steam is utilized, salt generated when acidic gas ingredients in the smoke directly or indirectly react with alkaline matter in the presence of water is controlled or reduced, and then atmosphere haze pollution related with the smoke is controlled or reduced.

Description

technical field [0001] The invention relates to a boiler flue gas energy-saving low-carbon haze reduction system, which is mainly used for large-scale cooling of boiler flue gas to generate vapor-liquid phase change to recover heat energy, and at the same time solve the problems of acidic water corrosion and blockage of flue flue, and ensure the recovery of waste heat of flue gas Steady running control of the specific heat required for desulfurization and desulfurization. Background technique [0002] Existing energy-saving equipment and systems for boiler flue gas cooling, heat exchange through interval heat exchange, and recover the heat energy in the flue gas. The heat exchange parts in the heat exchange equipment are usually tubes or coils, which are limited by the design specifications Condensation must not be allowed in the flue of the boiler and the acidic water condensed from the flue gas will not corrode the pipes, etc. The existing energy-saving equipment can use t...

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Problems solved by technology

[0002] Existing energy-saving equipment and systems for boiler flue gas cooling, heat exchange through interval heat exchange, and recover the heat energy in the flue gas. The heat exchange parts in the heat exchange equipment are usually tubes or coils, which are limited by the design specifications Condensation must not be allowed in the flue of the boiler and the acidic water condensed from the flue gas will not corrode the pipes, etc. The existing energy-saving equipment can use the sensible heat in the flue gas, and the water vapor contains a large amount of latent heat of vaporization but has not been released, forming energy. waste and environmental pollution

[0003] On the other hand, this kind of flue gas not only has a high temperature, but also has a high moisture content, which provides the required moisture for acid gases such as sulfur dioxide to combine with water to form acidic substances, and then react with alkaline components in the flue gas to form salts. Studies have shown that this salt is an important source and cause of atmospheric haze pollution, especially severe haze. Only by controlling the temperature of the flue gas to not be lower than the dew point, although it has an obvious effect in avoiding corrosion of pipelines by acidic condensed water, but Not only does the above-mentioned waste of heat energy exist, but it is also not conducive to the control of haze pollution caused by flue gas

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