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Process for extracting rice and wheat straw fiber by adopting weak alkali method

A technology of alkaline extraction and rice straw, which is applied in fiber raw material treatment, pulping liquid regeneration, pulp beating/refining methods, etc., can solve the problems of large wastewater discharge, large water consumption, and high energy consumption. To achieve the effect of improving the extraction rate

Inactive Publication Date: 2017-12-26
TIANJIN RONGYEDA TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the present invention aims to propose a process for extracting rice-wheat stalk fibers by weak alkali method, which provides a process with less water consumption, low energy consumption and high fiber extraction rate, and other substances in rice-wheat stalks can be Precipitation and utilization, no waste water discharge, to solve the problems of large water consumption, high energy consumption, low fiber yield, unusable other effective substances, large waste water discharge, etc.

Method used

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  • Process for extracting rice and wheat straw fiber by adopting weak alkali method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare infiltration solution:

[0032] Dissolve 80 parts of sodium bicarbonate in 400 parts of water to form a solution, then add 5 parts of alkaline xylanase, 3 parts of fatty alcohol surface penetrant, 3 parts of activated carbon catalyst, 3 parts of oxidized polyethylene wax, 3 parts epoxidized soybean oil, mixed well.

[0033] The rice straw is first crushed, cut into a small section of straw, and then kneaded and slag removed, the rice straw is initially pretreated, and debris such as debris is removed.

[0034] Then put the straw section into the infiltration tank, add weakly alkaline infiltration solution into the infiltration tank according to the ratio of straw mass:infiltration solution mass=4:0.5, and infiltrate for 5 hours. The soaked straw section is put into a rubbing machine for rubbing. During the rubbing process, the soaking liquid is continuously added. The quality of the soaking liquid is half of the mass of the soaking liquid added for the first ti...

Embodiment 2

[0037] Prepare infiltration solution:

[0038] 84 parts of sodium carbonate are dissolved in 450 parts of water to form a solution, then add 4 parts of alkaline xylanase, 3 parts of fatty alcohol surface penetrants, 3 parts of activated carbon catalysts, 3 parts of oxidized polyethylene wax, 4 parts of epoxidized soybean oil, and stir evenly.

[0039] The rice straw is first crushed, cut into a small section of straw, and then kneaded and slag removed, the rice straw is initially pretreated, and debris such as debris is removed.

[0040] Then put the straw section into the infiltration tank, add weakly alkaline infiltration solution into the infiltration tank according to the ratio of straw mass: infiltration solution mass = 4.5:0.5, and infiltrate for 4 hours. The soaked straw section is put into a rubbing machine for rubbing. During the rubbing process, the soaking liquid is continuously added. The quality of the soaking liquid is half of the mass of the soaking liquid adde...

Embodiment 3

[0043] Prepare infiltration solution:

[0044] Dissolve 85 parts of sodium bicarbonate in 450 parts of water to form a solution, then add 5 parts of alkaline xylanase, 3 parts of fatty alcohol surface penetrants, 4 parts of activated carbon catalysts, 4 parts of oxidized polyethylene wax, 2 parts epoxidized soybean oil, mixed well.

[0045] The rice straw is first crushed, cut into a small section of straw, and then kneaded and slag removed, the rice straw is initially pretreated, and debris such as debris is removed.

[0046] Then put the straw section into the infiltration tank, add weakly alkaline infiltration solution into the infiltration tank according to the ratio of straw mass:infiltration solution mass=4:0.5, and infiltrate for 5 hours. The soaked straw section is put into a rubbing machine for rubbing. During the rubbing process, the soaking liquid is continuously added. The quality of the soaking liquid is half of the mass of the soaking liquid added for the first ...

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Abstract

The invention provides a process for extracting rice and wheat straw fiber by adopting a weak alkali method. The process sequentially comprises the steps of mechanical straw crushing, infiltration, rubbing, thermal grinding, rinsing and liquid separation, wherein the pre-rubbing and residue-removal process is also arranged between the mechanical crushing process and the infiltration process, an infiltration fluid is prepared from, by mass, 75-90 parts of strong alkali and weak acid salt, 3-5 parts of biological enzyme, 1-4 parts of penetrating agent, 2-5 parts of catalyst, 2-5 parts of softening agent, 1-4 parts of stabilizer and 300-550 parts of water. The process is low in water consumption, low in energy consumption and high in fiber extracting rate, other substances in rice and wheat straw can precipitate out for utilization, no wastewater is discharged, and accordingly the problems of high water consumption, high energy consumption, low fiber yield, unavailability of other active substances, large wastewater discharging amount and the like are solved.

Description

technical field [0001] The invention belongs to the technical field of fiber extraction technology from straw, and in particular relates to a technology for extracting fiber from rice straw with a weak alkali method. Background technique [0002] At present, domestic rice straw fiber extraction mainly includes chemical methods such as caustic soda method, sulfate method, and ammonia-soda method, supplemented by mechanical methods. The disadvantages of these traditional methods are large water consumption, high energy consumption, low fiber yield, other substances in the straw except fiber such as lignin and pectin cannot be reused, and a large amount of sewage needs to be discharged. Moreover, the extraction rate of fibers is low, and the reagents used are more dangerous, which is not conducive to the operation safety of the staff. Contents of the invention [0003] In view of this, the present invention aims to propose a process for extracting rice-wheat stalk fiber by a...

Claims

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Application Information

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IPC IPC(8): D21B1/06D21B1/16D21D1/00D21C9/02D21C11/00D21C5/00
CPCD21B1/06D21B1/16D21C5/00D21C9/02D21C11/00D21D1/004
Inventor 王从容
Owner TIANJIN RONGYEDA TECH DEV