High-temperature coal gas desulfurizer using coal ash as carrier and desulfurization device thereof

Abstract

The invention aims at solving the problem such as low desulphurization activity of desulfurizer, low mechanical strength, poor regeneration property and higher cost and the like, which discloses a high temperature desulfurizer which uses coal ash as carrier and a desulfurization device , the method comprises utilizing mechanical mixing method to mix multicomponent metal oxide, coal ash and adhesive of the activity component through machine, then extruding into strip shape by utilizing a self-made desulfurizer, drying formed desulfurizer under the temperature of 100-200 DEG C, and calcining under the temperature of 600-1000 DEG C, desulfurizer which is calcined is directly used to desulfurize coal gas under the high temperature. High-temperature desulfuration of hot coal gas adopts a circulating fluidized bed to achieve continuous desulfurization and regeneration, and desulfurizer can effectively remove H2S in high-temperature coal gas under the temperature scope which is 400-750 DEG C. Desulfurizer after being vulcanized can be regenerated in a fluid bed regenerating device. The high temperature desulfurizer has the advantages of simple preparation technique, simple equipment and low cost, which has higher vulcanization activity and sulfur capacity, excellent desulfurizing capacity and higher mechanical strength, and opens up a new approach which utilizes ash from power plant to be carrier to prepare high-temperature coal gas desulfurizer.

Description

Technical field: [0001] The invention relates to a high-temperature gas desulfurizer and a desulfurization device, in particular to a high-temperature gas desulfurizer and a desulfurizer with power plant fly ash as a carrier. The high-temperature gas desulfurizer prepared by the invention will be used in coal gasification-based The polygeneration system belongs to the field of clean coal technology. Background technique: [0002] my country is the largest coal producer in the world. In 2005, the coal output reached 2.12 billion tons, ranking first in the world. my country is one of the few countries in the world where coal is the primary energy source. In 2005, coal accounted for about 70% of my country's energy. With the increase of coal production year by year, the proportion of coal in the energy composition will further increase. About 70-80% of my country's coal consumption is used for combustion, of which power coal accounts for 53% of coal combustion, but the effici...

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Problems solved by technology

[0003] In order to solve the problems of low desulfurization activity, low mechanical strength, poor regeneration performance, high price, serious pulverization and complicated preparation process of the desulfurizer, the present invention proposes the following solutions: high-temperature gas with fly ash as the carrier Desulfurizer, the finished product desulfurizer is obtained by mechanically mixing, molding and calcining the multi-element metal oxides, fly ash and binder of the active component by mechanical mixing method; proportioning by weight percentage, the active component The content of multiple metal oxides is 20%-80% (wt, db), the content of fly ash is 10-60%, and the content of binder (kaoline) is 5-30%; its composition form is (Fe x Ce 1-x ) y (Mo, La) 1-y / (ash, kaoline); where the value of x is 0.2-0.7, and the value of y is 0.4-0.9; after uniformly mixing multi-component metal oxides with fly ash and binder according to the above ratio, use self-made desulfurizer to granulate Machine extrusion molding, the formed desulfurizer is dried at 100-200°C, and then calcined at 600-1000°C, and the calcined desulfurizer is directly used for high-temperature gas desulfurization

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