Production method of desulfur denitrate dust collecting active coke

Abstract

The present invention relates to a method for producing desulfurization denitration dust-removing active coke by using brown coal as raw material. Said method includes the following steps: mixing brown coal and coking coal according to a certain mixing ratio, pulverizing them to obtain coal powder; adding coal tar and water base emulsifying agent to make them into coal paste; hydraulic strip-extruding to obtain strip granules, drying and charring in charring furnace, placing the above-mentioned material into activating furnace to make activation to obtain activated material, making natural oxidation so as to obtain the invented active coke.

Description

Technical field: [0001] The invention relates to a desulfurization and denitrification active coke and a production method, in particular to an active coke directly made from lignite capable of dedusting and a production process thereof. Background technique: [0002] At present, there are many activated carbon production methods used for flue gas desulfurization and denitrification. Most of the semi-coke activated carbon is chemically treated to increase the surface desulfurization and denitrification ability. Although the activated carbon of the above-mentioned production method can desulfurize and denitrify, there are still disadvantages such as small specific surface area, low strength, undeveloped mesopores, and poor desulfurization and denitrification effect. Due to different methods, the raw materials used are also different, and each has its advantages and disadvantages. For example, German BF Company uses lignite plus binder, which is used in dry desulfurization dev...

AI Technical Summary

Problems solved by technology

Although the activated carbon of the above production method can desulfurize and denitrify, there are still disadvantages such as small specific surface area, low strength, underdeveloped mesopores, and poor desulfurization and denitrification effects. Due to different methods, the raw materials used are also different, and each has its own advantages and disadvantages.

For example, German BF Company uses lignite plus binder, which is used in dry desulfurization device of thermal power plant after carbonization, which can only desulfurize, but cannot remove nitrogen oxides and dust; It is mixed with the binder under heating conditions, and after forming, it is dry-distilled and activated to form activated carbon. The process is relatively complicated; the method for preparing activated carbon disclosed in CN1202004C uses various gases such as ammonia, hydrogen, and ethylene in the oxidation-reduction process, which means that the cost is high. , and the process is complicated; CN1120746C discloses the activated coke preparation method, the activation time is 5-6 hours, and the strength of the prepared activated carbon is low; CN1089034C discloses a flue gas desulfurization catalyst and its application method, which only solves the desulfurization problem; CN1806910A The disclosed preparation method of activated coke for flue gas treatment needs to use KOH, KCl, NaOH, urea, etc., and grind the asphalt into 180-400 mesh at normal temperature, which is technically difficult and difficult to realize; CN1212887C discloses a simultaneous desulfurization Denitrification activated carbon and its application method have complicated process and high cost; a method for preparing activated carbon disclosed in CN1491886A needs to be reduced under the conditions of ammonia, hydrogen, methylamine, ethylene or acetylene, and the process conditions are complicated and the cost is high; CN1200876C discloses the production The method of desulfurization and denitrification activated carbon is to mix bituminous coal with coking coal, grind it, then mix it with coal tar, form it into strip particles through liquefaction, and make activated carbon through three stages of carbonization, activation and oxidation. The activated carbon prepared by this method is also There are disadvantages of high cost and small stacking weight