Energy saving and environmental protecting equipment and process for reducing white smoke in flue gas

Abstract

The invention relates to energy saving and environmental protecting equipment and a process for reducing white smoke in flue gas. The equipment is provided with a glass plate heat exchanger behind a desulfurization tower; an inlet position of the glass plate heat exchanger is respectively connected with a fan II for feeding normal-temperature air and an outlet of the desulfurization tower; a fan I is arranged in an outlet position of the glass plate heat exchanger; and the glass plate heat exchanger is connected with a condensate water discharge pipe extending to a desulfurization tower II or a sewage treatment place. The process uses cold air for exchanging heat with desulfurized flue gas, so that the temperature of the flue gas is further lowered, condensate water is separated out, and the separated condensate water can be recycled; the cold air is heated by the flue gas to form hot air; one part of the hot air serves as combustion assisting air to enter a hearth; and the other part of hot air is uniformly mixed with the cooled flue gas to slightly raise the temperature of the flue gas and to dilute water in the flue gas so as to difficultly form the white smoke rising and trailing phenomenon in a chimney outlet. The equipment and the process are better in application prospect.

Description

technical field [0001] The invention relates to an environmental protection equipment and process, in particular to an energy-saving and environmental protection equipment and process for reducing flue gas white smoke. Background technique [0002] The problem of ultra-low emission of smoke exhaust from power plant boilers and petrochemical heating furnaces has attracted widespread attention from all walks of life and the country's strong attention. Especially in developed areas such as the Yangtze River Delta, Pearl River Delta, Beijing and Tianjin along the southeast coast, the problem of white smoke from chimneys has become a hot issue that urgently needs to be solved. [0003] The wet desulfurization process refers to the use of lime (CaO), limestone (CaCO 3 ), sodium carbonate (Na 2 CO 3 ) and other alkaline pulp washing liquid as detergent, and the flue gas is washed in the desulfurization tower to remove SO in the flue gas 2 process method. For coal-fired power p...

AI Technical Summary

Problems solved by technology

However, GGH is mostly made of metal materials. During use, it often breaks down due to acid dew point corrosion, blockage, etc., and stops working. Therefore, it is urgent to develop a new equipment and process to control the problem of white smoke from the chimney

Images