Method for preparing coal gas, top-grade active carbon, water glass and silicate phosphate from rice hulls

A technology of activated carbon and silicon phosphate, applied in the direction of phosphate, phosphorus oxyacid, silicate, etc., can solve the problems of low utilization rate of gas, waste of resources, inability to process rice husk carbon deeply, etc., to expand the scope of application and market good prospects

Active Publication Date: 2010-11-24
长沙稻香农业科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its advantages are relatively simple equipment, low cost, and easy construction. The disadvantage is that the gas utilization rate is low (generally about 30%), and it is not easy to connect to the grid for power supply; for large-scale power plants (installed capacity ≥ 100 MW), gas turbines are commonly used for power generation. Its biggest advantage That is, the gas utilization rate is high (about 40%), and it is easy to connect to the grid for power supply; for medium-sized power plants, supercritical steam turbines are commonly used to generate electricity, and the ...

Method used

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  • Method for preparing coal gas, top-grade active carbon, water glass and silicate phosphate from rice hulls
  • Method for preparing coal gas, top-grade active carbon, water glass and silicate phosphate from rice hulls
  • Method for preparing coal gas, top-grade active carbon, water glass and silicate phosphate from rice hulls

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Experimental program
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Effect test

Embodiment 1

[0048] Embodiment 1: After 7.5 tons of rice husks are used to generate electricity, high-quality activated carbon, water glass primary product and silicon phosphate primary product are produced.

[0049] The first step: add 7.5 tons of rice husks to the gas generator in stages, smolder, carbonize and activate at 550-580 ° C to generate gas for power generation. After carbonization and activation, the husk is discharged from the bottom of the furnace to obtain 2.5 tons of rice husk charcoal, and its iodine adsorption value is 110mg / g;

[0050] The second step: Add 2.5 tons of the obtained rice husk charcoal into 3.3 tons of sodium hydroxide solution with a concentration of 22%, pump it into the reaction kettle, stir and heat it to 130-140°C, and react for 4-5 hours. The solid-liquid mixture is filtered, the filtrate is water glass, and the filter residue is the first-grade activated carbon after drying, weighing about 1.8 tons (the activated carbon particles contain a large amo...

Embodiment 2

[0055] Embodiment 2: After 7.5 tons of rice husks are used to generate electricity, high-quality activated carbon and the first product of silicon phosphate and the first product of water glass are produced.

[0056] The first step: add 7.5 tons of rice husks to the gas generator in stages, smolder, carbonize and activate at 550-580 ° C to generate gas for power generation. After carbonization and activation, the husk is discharged from the bottom of the furnace to obtain 2.5 tons of rice husk charcoal, and its iodine adsorption value is 110mg / g;

[0057] The second step: Add 2.5 tons of the obtained rice husk charcoal to 2.5 tons of phosphoric acid solution with a concentration of 22%, pump it into the reaction kettle, stir and heat to 130-140°C, and react for 4-5 hours, and the solid-liquid obtained after the reaction The mixture is filtered, the filtrate is silicon phosphate, and the filter residue is primary activated carbon after drying, weighing about 1.8 tons (activated...

Embodiment 3

[0063] After generating electricity from 7.5 tons of rice husks, high-quality activated carbon, primary silicon phosphate and primary water glass are produced.

[0064] The first step: add 7.5 tons of rice husks to the gas generator in stages, smolder, carbonize and activate at 550-580 ° C to generate gas for power generation. After carbonization and activation, the husk is discharged from the bottom of the furnace to obtain 2.5 tons of rice husk charcoal, and its iodine adsorption value is 110mg / g;

[0065] The second step: add 2.5 tons of the obtained rice husk charcoal into 2.5 tons of phosphoric acid solution with a concentration of 22%, heat to 130-140°C, react for 4-5 hours, filter the solid-liquid mixture obtained after the reaction, and the filtrate is It is silicon phosphate, and after the filter residue is dried, it is the first-grade activated carbon, weighing about 1.8 tons (activated carbon particles contain a large amount of silicon phosphate), and its iodine ads...

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Abstract

The invention relates to a method for preparing coal gas, high-grade active carbon, water glass and silicate phosphate from rice hulls, which comprises the following steps of: smouldering, carbonizing and activating the rice hulls to produce the coal gas for power generation and to obtain rice hull carbon; activating the rice hull carbon with acid and alkaline to obtain low-grade active carbon, packaging the low-grade active carbon in a dust-proof explosion-proof sealed mode, and activating at moderate temperature, secondary high temperature and high temperature to finally obtain the high-grade active carbon and produce the water glass and the silicate phosphate simultaneously. The defect of low-grade active carbon prepared from the rice hull carbon in the prior art is overcome. The invention has reasonable technological method and technological process, and solves the technical obstacles on moderate temperature and high temperature activation of the rice hull carbon. The rice hull carbon obtained after preparing the coal gas from the rice hulls can be directly used for producing the high-grade active carbon, the water glass and the silicate phosphate, and the economical benefits and the social benefits of the rice hulls are effectively increased. Large-scale industrial production can be realized, and a new approach is provided for realizing a complete industrial chain of agriculture industrialization and rice processing.

Description

technical field [0001] The invention relates to a comprehensive development and utilization method of rice husks, in particular to a method for preparing gas, high-grade activated carbon, water glass and silicon phosphate from rice husks. Background technique [0002] Although the utilization of rice husk has existed since ancient times, such as heating as fuel, making toothbrush powder, cosmetic face whitening powder, heat preservation ash, etc., it is basically burned, which not only has a low utilization rate, but also pollutes the environment. In the past 30 years, due to the lack of non-renewable resources, the demand for environmental protection and the development of science and technology, people have made research on the utilization of renewable rice husks, especially the comprehensive utilization, and some progress has been made in the past 10 years. For example, use rice husks to prepare activated carbon or water glass or white carbon black (SiO2), and some have a...

Claims

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Application Information

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IPC IPC(8): C01B31/08C01B33/32C01B25/26
Inventor 成如山成宇
Owner 长沙稻香农业科技有限公司
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