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Quick lime desiccant and production process thereof

A production process and technology of quicklime, applied in the direction of dispersion particle separation, chemical instruments and methods, separation methods, etc., can solve the problems of easy agglomeration on the surface of quicklime, affect the drying effect, reduce the particle size of quicklime, etc., and achieve good moisture absorption and drying effect , easy to operate, avoid under-burning or over-burning effect

Active Publication Date: 2013-04-24
ZHEJIANG JIANDE HONGXING CALCIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the surface of quicklime in the quicklime desiccant in the prior art is prone to agglomeration, reduce the particle size of quicklime and affect the drying effect, and provides quicklime with anti-caking, good hygroscopic drying effect and low cost desiccant

Method used

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  • Quick lime desiccant and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Limestone crushing: Limestone with a calcium carbonate content of 97% is crushed into particles with a particle size of 1-2 cm.

[0025] (2) Calcined material preparation: mix limestone particles and absolute ethanol evenly to obtain calcined material, wherein the weight ratio of absolute ethanol to limestone particles is 1:1.

[0026] (3) Preheating: put the calcined material into the preheater and preheat to 870°C, and the preheating heating rate is 10°C / min.

[0027] (4) Calcination: Send the preheated calcined material into the gas-fired lime rotary kiln, and calcinate at 1000°C for 20 minutes to obtain quick limestone.

[0028] (5) Discharge crushed material: After the quick limestone is cooled to 90°C, the material is discharged, and after discharge, the quick limestone is crushed into quicklime particles with a particle size of 1~2mm.

[0029] (6) Mixed packaging: Mix quicklime particles, sodium tripolyphosphate, chitosan and nano-silica with a particle size...

Embodiment 2

[0032] (1) Limestone crushing: Limestone with a calcium carbonate content of 98% is crushed into particles with a particle size of 1-2 cm.

[0033] (2) Calcined material preparation: mix limestone particles and absolute ethanol evenly to obtain calcined material, wherein the weight ratio of absolute ethanol to limestone particles is 1:2.

[0034](3) Preheating: put the calcined material into the preheater to preheat to 900°C, and the preheating temperature rise rate is 7°C / min.

[0035] (4) Calcination: Send the preheated calcined material into the gas-fired lime rotary kiln and calcinate at 1100°C for 10 minutes to obtain unslaked limestone.

[0036] (5) Discharge crushed material: After the quick limestone is cooled to 80°C, the material is discharged, and after discharge, the quick limestone is crushed into quicklime particles with a particle size of 1~2mm.

[0037] (6) Mixed packaging: Mix quicklime particles, sodium tripolyphosphate, chitosan and nano-silica with a parti...

Embodiment 3

[0039] (1) Limestone crushing: Limestone with a calcium carbonate content of 98% is crushed into particles with a particle size of 1-2 cm.

[0040] (2) Calcined material preparation: mix limestone particles and absolute ethanol evenly to obtain calcined material, wherein the weight ratio of absolute ethanol to limestone particles is 1:3.

[0041] (3) Preheating: put the calcined material into the preheater to preheat to 850°C, and the preheating temperature rise rate is 8°C / min.

[0042] (4) Calcination: Send the preheated calcined material into the gas-fired lime rotary kiln for 15 minutes at 1050°C to obtain quick limestone.

[0043] (5) Discharge crushed material: After the quick limestone is cooled to 100°C, the material is discharged. After the discharge, the quick limestone is crushed into quicklime particles with a particle size of 1~2mm.

[0044] (6) Mixed packaging: Mix quicklime particles, sodium tripolyphosphate, chitosan and nano-silica with a particle size of 20-...

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Abstract

The invention discloses a quick lime desiccant, which solves the problems that a quick lime desiccant in the prior art is prone to being caked, so that the granularity of the quick lime is lowered, and a drying effect is influenced. The quick lime is prepared by mixing the following components in percentage by weight: 0.1%-0.5% of sodium tripolyphosphate, 0.1%-0.5% of chitosan, 1%-5% of nano-silicon dioxide and the balance of quick lime particles. The quick lime desiccant has the advantages of anti-caking, favorable moisture absorption and drying effects, low cost and the like. The invention also discloses a production process of the quick lime desiccant. The production process of the quick lime desiccant mainly comprises the steps of smashing lime stones, preparing calcined materials, preheating the calcined materials, carrying out calcinations on the preheated materials, outputting and crushing the materials, and packaging the mixture. The production process has the advantages of simple steps and easiness in operation, and is suitable for industrial production. Moreover, according to the production process, the under burnt or overburning phenomenon of the lime stones can be efficiently avoided, and the quality of the prepared quick lime is favorable.

Description

technical field [0001] The invention relates to a desiccant, in particular to a quicklime desiccant and a production process thereof. Background technique [0002] The main component of quicklime desiccant is calcium oxide. The drying principle is that calcium oxide absorbs water to generate calcium hydroxide. Because quicklime desiccant has fast, stable and high-efficiency moisture absorption, the effect of drying and absorbing moisture is remarkable, and it is not affected by the ambient humidity. It is cheap and cost-effective. It is widely used in food, clothing, tea, leather, shoemaking, electrical appliances and other industries due to its high advantages. [0003] Traditional quicklime desiccants are usually packaged directly with quicklime. Quicklime is calcined in a lime kiln from limestone, marble and other stones containing a large amount of calcium carbonate. Calcium oxide in quicklime becomes calcium hydroxide after absorbing water, and hydrogen Calcium carbona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/28
Inventor 周建红
Owner ZHEJIANG JIANDE HONGXING CALCIUM
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