Preparation system and method of mercury-removing sulfur-carrying activated carbon/coke

Abstract

The invention discloses a preparation system and method of mercury-removing sulfur-carrying activated carbon/coke. The preparation system comprises a thermal carbon reduction tower, a first separatorand an activated carbon sulfur carrier, wherein the thermal carbon reduction tower provides an environment making SO2 in flue gas and a carbon material to achieve thermal carbon reduction and produceselemental sulfur vapor; the gas outlet end of the thermal carbon reduction tower is connected with a first separator, the first separator is used for gas-solid separation; the gas outlet end of the first separator is communicated with the lower end of the activated carbon sulfur carrier, the solid outlet end of the first separator is communicated with the upper end of the activated carbon sulfurcarrier, and the activated carbon sulfur carrier is connected with an activated carbon/coke storage tank. A small amount of calcium sulfate presents in the coke required for thermal carbon reduction,in the process of thermal carbon reduction, calcium sulfate and a carbon material generate calcium sulfide at 400-900 DEG C, the elemental sulfur vapor generated by the thermal reaction of the calciumsulfide and carbon forms calcium sulfide in the range of 750-1000 DEG C, and the calcium persulfate has good mercury removing capability.

Description

technical field [0001] The invention belongs to the field of preparation of activated carbon mercury removal materials, and in particular relates to a preparation system and method for sulfur resource utilization of mercury removal sulfur-loaded activated carbon / coke. Background technique [0002] Mercury is highly toxic, carcinogenic, persistent, highly corrosive, difficult to degrade and easy to accumulate, and has always been a difficult point in environmental governance. Mercury has extremely high physiological toxicity. Any form of mercury in the environment can be converted into highly toxic methylmercury under certain conditions, which will cause great damage to the central nervous system of the human body after entering the human body. With the continuous increase of coal-fired units in my country, the combustion of fuel coal, and the use of mercury-containing catalysts in petrochemical industries, a large amount of mercury in different forms is emitted into the atmo...

AI Technical Summary

Problems solved by technology

Activated carbon is a kind of adsorbent with well-developed pore structure and stable chemical properties. Although it has a high specific surface area, the mercury removal ability of ordinary activated carbon is usually relatively low due to the high volatility of mercury and the weak binding between mercury and the surface of carbon. weak

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