Device and method for treating carbon black tail gas and application of tail gas

Abstract

The invention discloses a device and a method for treating carbon black tail gas and an application of the tail gas. The device comprises a carbon black tail gas pressurizing fan, a dehydration tower and a dehydrated tail gas fan, which are connected in sequence, wherein the upper part of the dehydration tower is further connected with a spraying water pump; the lower part of the dehydration tower is further connected with a circulating cooling water system; the circulating cooling water system is further connected with the spraying water pump; and the dehydration tower sequentially comprises a de-foaming device, a liquid distributor, a gas-liquid distributor and a gas initial distributor from top to bottom. According to the device disclosed by the invention, a lot of water in the carbon black tail gas can be effectively removed, the calorific value of the carbon black tail gas is improved, the dew point of the tail gas is reduced, the corrosion to equipment is relieved, harmful substances including carbon black dust are removed, the quality of the carbon black tail gas is improved, national energy conservation and emission reduction are met, and an industrial policy of the circular economy is developed; the device has obvious economic benefits and social benefits; and the treated carbon black tail gas replaces melted-down coal gas of a coke furnace and the replaced melted-down coal gas with the high calorific value is supplied for cities, so that effective and recycled utilization of resources is achieved.

Description

technical field [0001] The invention relates to a technology for treating carbon black tail gas, in particular to a dehydration and purification treatment of carbon black tail gas. Background technique [0002] Carbon black tail gas is a low calorific value harmful gas containing combustible components emitted during the production of carbon black. CO, H in the tail gas 2 , CmHn, H 2 S and other gases directly discharged into the air will cause serious pollution to the atmospheric environment. [0003] At present, there are mainly two ways to deal with carbon black tail gas in China. One way is to discharge directly at high altitude after being incinerated by the incinerator. Although this method basically meets the environmental protection requirements, it does not make effective use of the heat source, and the low calorific value of the tail gas is about 510Kcal / Nm 3 ~630Kcal / Nm 3 (The low calorific value of carbon black tail gas varies with the variety of carbon blac...

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Problems solved by technology

One way is to discharge directly at high altitude after being incinerated by the incinerator. Although this method basically meets the environmental protection requirements, it does not make effective use of the heat source, and the low calorific value of the tail gas is about 510Kcal / Nm 3 ~630Kcal / Nm 3 (The low calorific value of carbon black tail gas varies with the variety of carbon black produced), and the economy is not good

The other is burned by a boiler to produce steam for production and domestic use or to drive a steam turbine generator set to generate electricity. It is economical, but the water content of the high-humidity carbon black tail gas is about 38% to 41%, and the low calorific value of the tail gas is about 510Kcal / N m 3 ~630Kcal / Nm 3 (The composition of carbon black tail gas varies with the type of carbon black produced), low combustion temperature, incomplete tail gas combustion, low heat utilization efficiency, and serious corrosion of equipment and pipelines

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