Process for high-temperature flue gas purification, white smoke elimination and waste heat recovery

Abstract

The invention relates to the technical field of flue gas or waste gas treatment, in particular to a process for high-temperature flue gas purification, white smoke elimination and waste heat recovery.The process comprises a flue gas purification, white smoke elimination and heat recovery all-in-one machine. The all-in-one machine comprises a total heat recovery device, a high-temperature sensibleheat recovery device, a salt solution moisture absorption device and a reheating air supply device. The total heat recovery device comprises a high-temperature total heat recovery device, a medium-temperature total heat recovery device and a low-temperature total heat recovery device. The high-temperature total heat recovery device comprises an ash-water separation device and a high-temperature heat recovery plate heat exchanger A. The ash-water separation device comprises a full-automatic rotary cage type filter unit and a filter press. The salt solution moisture absorption device is provided with a solution regeneration device. The purification and white smoke elimination effects on high-temperature dusty smoke (or high-temperature industrial waste gas) are well achieved through a whitesmoke elimination unit, the ideal environment-friendly effect is achieved, meanwhile, waste heat in the smoke is recycled to the maximum degree, and economic benefits and social benefits are improved.

Description

technical field [0001] The invention relates to the technical field of flue gas or waste gas treatment, in particular to a high-temperature flue gas purification and whitening waste heat recovery process. Background technique [0002] High-temperature flue gas (or industrial waste gas) contains various complex solid and gas pollutants. At present, the high-temperature flue gas (or industrial waste gas) of many boilers is directly discharged into the atmosphere without any treatment, causing serious environmental pollution. , especially excessive nitrogen oxides can also lead to severe smog. In addition, a large amount of heat in the flue gas is directly discharged into the atmosphere without recycling, which not only causes a lot of energy waste, but also aggravates the greenhouse effect of the atmosphere and deteriorates the ecological environment. When the atmospheric temperature is low, the water vapor in the exhausted flue gas (or industrial waste gas) is easily condens...

AI Technical Summary

Problems solved by technology

[0002] High-temperature flue gas (or industrial waste gas) contains various complex solid and gas pollutants. At present, the high-temperature flue gas (or industrial waste gas) of many boilers is directly discharged into the atmosphere without any treatment, causing serious environmental pollution. , especially if nitrogen oxides exceed the standard, it will also lead to severe smog

In addition, a large amount of heat in the flue gas is directly discharged into the atmosphere without recycling, which not only causes a lot of energy waste, but also aggravates the greenhouse effect of the atmosphere and deteriorates the ecological environment.

When the atmospheric temperature is low, the water vapor in the exhausted flue gas (or industrial waste gas) is easily condensed into water mist, resulting in a large number of "smoke plumes" at the chimney discharge port, causing serious visual pollution and air pollution

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