Manufacturing technology for low-sulfur activated carbon

Abstract

The invention provides a manufacturing technology for low-sulfur activated carbon. A desulfuration process, an alkali wash process and a drying process are added in a carbonizing process and an activation process, wherein a desulfurization agent of 10-30% is sprayed into the carbonized material to oxidize the contained sulfur element to a water-soluble compound to be removed through rinsing; an alkali liquor such as ammonia water is adopted for regulation for neutrality, and a drying process is conducted; in the carbonizing process, carbonizing agents such as ammonium dihydrogen phosphate or ammonium chloride can be used for impregnating the carbonized material for carbonizing processing under the working condition of 160-330 DEG C; the desulfurization agent is preferably a blend of nitric acid with concentration of 60-70% and hydrochloric acid with the concentration of 25-37%. The manufacturing technology can effectively remove the sulfur element in the activated carbon, so that the activated carbon has a wider application range and a better effect, the porosity of the activated carbon is increased, and the adsorptive property is remarkably improved.

Description

technical field [0001] The invention relates to a process for preparing activated carbon used in industry. Background technique [0002] To prepare activated carbon, it is necessary to prepare the carbonized material intermediate first. [0003] In the carbonization process for preparing carbonized materials and the activation process for making activated carbon, [0004] The carbon-containing raw materials used to make carbonized materials are generally coal, wood, fruit shells or plant roots. Sulfur is one of the essential nutrients for plants, and it accounts for a few percent of the dry weight of the plant (the way sulfur enters the plant: absorb sulfate from the soil, and transform it into cysteine ​​through biochemical action. Sulfur-containing biomass such as acid and protein; therefore, coal and wood shells from plants all contain sulfur elements). The carbonized raw materials are carbonized through the carbonization process (generally smoldering in isolated air a...

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Problems solved by technology

Although the invention mentions the obtaining of high-grade flue gas desulfurization activated carbon, the technical disclosure is insufficient, the process and the obtained desulfurization products lack organic connection, lack of analysis and explanation in line with chemical principles, and lack of practicability

[0011] On the web page of China Encyclopedia http: / / www.chinabaike.com / article / 316 / 327 / 2007 / 2007022156712.html, it is introduced that sulfuric acid liquid or hydrochloric acid vapor can be used as a carbonizing agent for wool to remove vegetable cellulose in wool Although the material process can remove trace amounts of sulfur, its technical purpose is not to remove sulfur, nor can it be removed completely.

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