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A reaction device and method for producing alumina

A reaction device, alumina technology, applied in chemical instruments and methods, inorganic chemistry, aluminum compounds, etc., can solve problems such as long service life, achieve long service life, shorten reaction time, and stable reaction

Inactive Publication Date: 2015-12-09
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a reaction device and method for producing alumina in order to solve the problems in the current technology. Features such as high conversion rate
Long device life

Method used

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  • A reaction device and method for producing alumina
  • A reaction device and method for producing alumina
  • A reaction device and method for producing alumina

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Put heat transfer oil or molten salt into the outer jacket (13) to preheat the combined spiral reactor (6), when the temperature inside the combined spiral tube reactor (6) reaches 280°C, turn on the drive motor ( 12) Ready to feed. Ammonium sulfate is added to the combined spiral reactor (6) through the metering feeding device (3) at the bottom of the ammonium sulfate premixing metering tank (1); according to the ratio of ammonium sulfate:fly ash of 1:1, the pulverized coal The ash is fed into the combined spiral reactor (6) from the fly ash storage metering bin (4) through the gravimetric feeder (5). The combined spiral reactor (6) is composed of 5 spiral tube reactors (8), including 2 single-screw reactors (11), and its dimensions are: length 5m, width 0.4m, height 0.6m, 3 A twin-screw reactor (12), whose external dimensions are: length 5m, width 0.6m, height 0.6m. The ammonia gas released by the reaction decomposition enters the gas collection pipe (9) through the...

Embodiment 2

[0052] Put heat transfer oil or molten salt into the outer jacket to preheat the combined spiral reactor. When the temperature inside the combined spiral reactor reaches 310°C, turn on the drive motor to prepare for feeding. Ammonium sulfate is added to the combined spiral reactor through the metering feeding device at the bottom of the ammonium sulfate premixing metering tank; according to the ratio of ammonium sulfate: fly ash of 1.5:1, the fly ash is stored from the fly ash storage metering bin through The gravimetric feeder is added to the combined screw reactor. The combined spiral reactor consists of 10 helical tube reactors, including 5 single-screw reactors, whose dimensions are: length 8m, width 0.6m, height 0.9m, and 5 twin-screw reactors, whose dimensions It is: length 8m, width 1.1m, height 0.9m. The ammonia gas released by the reaction decomposition enters the gas collection pipe through the gas outlet pipe on the upper part of each spiral tube reactor and leads ...

Embodiment 3

[0055] Put heat transfer oil or molten salt into the outer jacket to preheat the combined spiral reactor. When the temperature inside the combined spiral reactor reaches 350°C, turn on the drive motor to prepare for feeding. Ammonium sulfate is added into the combined spiral reactor through the metering feeding device at the bottom of the ammonium sulfate premixing metering tank; according to the ratio of ammonium sulfate: fly ash is 2.5:1, the fly ash is stored from the fly ash storage metering bin through The gravimetric feeder is added to the combined screw reactor. The combined spiral reactor consists of 13 helical tube reactors, including 9 single-screw reactors, whose dimensions are: length 8m, width 0.7m, height 1m, and 4 twin-screw reactors, whose dimensions are : Length 8m, width 1m, height 1m. The ammonia gas released by the reaction decomposition enters the gas collection pipe through the gas outlet pipe on the upper part of each spiral tube reactor and leads to th...

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Abstract

The invention relates to a reaction device and method for producing aluminum oxide, and particularly relates to a reaction device and method for producing aluminum oxide by taking pulverized fuel ash as a raw material. The reaction device comprises an ammonium sulfate pre-mixing measuring tank, a pulverized fuel ash storing-measuring bin, a combined spiral reactor, a material receiving tank and a gas collecting pipe, wherein the ammonium sulfate pre-mixing measuring tank and the pulverized fuel ash storing-measuring bin are arranged above the combined spiral reactor and are connected with an upmost inlet in the combined spiral reactor through connecting pipes at the bottom parts of the ammonium sulfate pre-mixing measuring tank and the pulverized fuel ash storing-measuring bin; and the material receiving tank is arranged below the combined spiral reactor and is connected with a lowest outlet in the combined spiral reactor through a connecting pipe at the top part of the material receiving tank. By the device and the method, the problems related to large-scaled production are solved; the device and the method have the characteristics of continuous production, high capacity of single-set device, reaction stability, high utilization rate or conversion rate of the raw material, and the like; the combined spiral reactor has the advantages of long service life, low production cost and the like; and the device and the method have a broad market prospect.

Description

technical field [0001] The invention relates to a reaction device and method for producing alumina, in particular to a device and method for extracting alumina from fly ash. Background technique [0002] In 1996, the national fly ash discharge exceeded 100 million tons, in 2000 it reached 120 million tons, and in 2005 it was 300 million tons. According to the 2009 forecast of the Fly Ash Professional Committee of the China Association of Comprehensive Utilization of Resources, my country's fly ash emissions will reach 540 million tons in 2015. In my country, fly ash is mainly used for construction materials, such as the production of fly ash concrete, fly ash cement, fly ash bricks, wall materials and building backfill, etc., and can also be used in agriculture, such as improving soil and making fertilizer , to reclaim the land and return it to the field. [0003] Fly ash is derived from the inorganic components in coal. Its chemical composition is mainly silica and aluminu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/26
Inventor 赵凤云刘硕刘玉敏胡永其张文娇崔蕊刘亚青
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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