Flue gas de-whitening device and technology for carbon black drying furnace

Abstract

The invention provides a flue gas de-whitening device and technology for a carbon black drying furnace. The device comprises a heat exchanger, a de-whitening tower and a cooling tower, wherein a liquid tank, at least one circulating liquid distributor, at least one packing layer, a cooling water distributor and a demister are arranged in a tower body from bottom to top in sequence; a flue gas inlet and a condensate outlet are formed in the lower side wall, located on the liquid tank, of the tower body; a flue gas outlet is formed in the upper side wall, located above the demister, of the towerbody; the heat exchanger is communicated with the flue gas inlet; the flue gas outlet is communicated with the heat exchanger; the heat exchanger is communicated with a chimney and the external carbon black drying furnace; the condensate outlet is communicated with an inlet of the cooling tower; an outlet of the cooling tower is communicated with the cooling water distributor. According to the flue gas de-whitening device and technology for the carbon black drying furnace, white visual pollution of flue gas can be obviously eliminated, and particularly, the effect is more remarkable in winter; meanwhile, collected condensate is recycled, water resources can be recycled at 35m<3> / h, so that production cost is substantially reduced, and the water resources are saved.

Description

technical field [0001] The invention belongs to the technical field of flue gas dewhitening, and in particular relates to a flue gas dewhitening device and process of a carbon black drying furnace. Background technique [0002] The exhaust gas furnace equipment supporting the carbon black drying furnace with an annual output of 40,000 tons / year, the fuel is generally carbon black exhaust gas or coke oven gas, and the exhaust gas volume after combustion of a single furnace is about 35000-450000Nm 3 / h / line, the moisture content of the flue gas on the wet base is 40-50%, and the main component of the flue gas on the dry base is CO 2 , N 2 , O 2 , The temperature at the outlet of the dryer is about 160-180 ℃, after the bag filter is used for dust removal to collect carbon black, it is emptied through the chimney. [0003] However, the flue gas discharged through the exhaust bag filter contains about 40%-50% water vapor, which causes waste of water resources on the one hand, ...

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Problems solved by technology

[0004] In order to solve the problems of white visual pollution and waste of water resources caused by flue gas discharge in the prior art, the object of the present invention is to provide a device for removing whitening of flue gas from a carbon black drying furnace. Furnace flue gas de-whitening process; through the flue gas de-whitening device and its process treatment, the white visual pollution of the flue gas can be obviously eliminated, especially in winter; the condensed water collected by the device is recycled, about 35m of water resources can be recycled 3 / h, greatly reducing production costs and saving water resources

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