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Method for separating lignin from bagasse, and special equipment thereof

A technology of separation equipment and special equipment, which is applied in the field of waste recycling of agricultural products, can solve the problems of high energy consumption, organic wastewater, and high equipment requirements, and achieve the effects of low energy consumption, increased crushing speed, and high energy-flux density

Inactive Publication Date: 2018-08-21
广西洋荣科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, although the technical ionic liquid solvents in these reports are more environmentally friendly in industrial application, it is difficult to use them on a large scale to completely separate lignin from bagasse, and the traditional method of separating lignin consumes much energy when used industrially. Large, high equipment requirements, and organic waste water will be generated due to the use of a large amount of organic solvents

Method used

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  • Method for separating lignin from bagasse, and special equipment thereof
  • Method for separating lignin from bagasse, and special equipment thereof
  • Method for separating lignin from bagasse, and special equipment thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] The method for separating lignin from bagasse, concrete operations are as follows:

[0042] (1) Bagasse pretreatment: first put the bagasse into a 90°C water bath for 30 minutes, and then dry the bagasse treated in the water bath by air blast to make the natural moisture content of the bagasse < 8%;

[0043] (2) Bagasse steam explosion pulping: Put the bagasse processed by blast drying in step (1) into the steam explosion pulping equipment, first inject water vapor to pressurize to 1.3MPa, keep the pressure for 10min, and then Increase the pressure to 1.5MPa, immediately open the valve to release the pressure, blast the bagasse into a cotton-like bagasse slurry, and carry out blast drying treatment on the obtained bagasse slurry again, so that the natural moisture of the bagasse slurry is <4%. Then the bagasse slurry is pulverized to 40 mesh to obtain bagasse slurry powder;

[0044] (3) Ultrasonic separation: Add the bagasse slurry powder obtained in step (2) into dist...

Embodiment 2

[0051] The method for separating lignin from bagasse, concrete operations are as follows:

[0052] (1) Bagasse pretreatment: first put the bagasse into a 100°C water bath for cleaning for 20 minutes, and then dry the bagasse treated in the water bath to make the natural moisture content of the bagasse < 8%;

[0053] (2) Bagasse steam explosion pulping: put the bagasse processed by blast drying in step (1) into the steam explosion pulping equipment, first inject water vapor to pressurize to 1.5MPa, keep the pressure for 8min, and then Increase the pressure to 1.7MPa, immediately open the valve to release the pressure, blast the bagasse into a cotton-like bagasse slurry, and carry out blast drying treatment on the obtained bagasse slurry again, so that the natural moisture of the bagasse slurry is <4%. Then the bagasse slurry is pulverized to 80 mesh to obtain bagasse slurry powder;

[0054] (3) Ultrasonic separation: Add the bagasse slurry powder obtained in step (2) into dist...

Embodiment 3

[0060] The method for separating lignin from bagasse, concrete operations are as follows:

[0061] (1) Bagasse pretreatment: first put the bagasse into a water bath at 90°C for 20 minutes, and then dry the bagasse treated in the water bath to make the natural moisture content of the bagasse < 8%;

[0062] (2) Bagasse steam explosion pulping: Put the bagasse processed by blast drying in step (1) into the steam explosion pulping equipment, first inject steam to pressurize to 1.3MPa, keep the pressure for 8min, and then Increase the pressure to 1.5MPa, immediately open the valve to release the pressure, blast the bagasse into a cotton-like bagasse slurry, and carry out blast drying treatment on the obtained bagasse slurry again, so that the natural moisture of the bagasse slurry is <4%. Then the bagasse slurry is pulverized to 80 mesh to obtain bagasse slurry powder;

[0063] (3) Ultrasonic separation: Add the bagasse slurry powder obtained in step (2) into distilled water and s...

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Abstract

The invention discloses a method for separating lignin from bagasse, and special equipment thereof. The method mainly comprises: (1) bagasse pretreatment; (2) steam explosion; (3) ultrasonic separation; 4) alkali extraction; (5) acid precipitation; and (6) drying refining. The present invention further provides the special equipment used by the method. According to the present invention, by adopting the synergetic treatment method of steam explosion and ultrasonic separation, the effective wall breaking on the bagasse is ensured, and the separation efficiency of the lignin is significantly improved so as to substantially improve the separation purity of the lignin in the bagasse; and the organic solvent is not used, and the designed equipment can ensure the smooth recovery of the waste liquid generated in the preparation process, such that the method is environmentally friendly.

Description

technical field [0001] The invention belongs to the field of recycling agricultural product waste, in particular to a method for separating lignin from bagasse and special equipment thereof. Background technique [0002] Lignin is a natural aromatic polymer compound composed of phenylpropane units linked by ether bonds (-O-) and carbon bonds (C-C). In plant fibers, lignin content is second only to cellulose and hemicellulose, and is the third largest natural organic matter, accounting for about 5-30%. Human beings have studied cellulose for thousands of years, but the study of lignin started in 1930, and the development is relatively slow. Lignin has good dispersibility, flame retardancy, solvent resistance, thermal stability, and its molecules have a variety of active functional groups (aryl, phenolic hydroxyl, alcoholic hydroxyl, carbonyl, methoxy, carboxyl, conjugated double etc.), which have high utilization value in modern industry; at present, high-quality lignin has...

Claims

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Application Information

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IPC IPC(8): C08H7/00
CPCC08H6/00
Inventor 梁志鹏淡贵添
Owner 广西洋荣科技有限公司
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