Unlock instant, AI-driven research and patent intelligence for your innovation.

Separation device and process of biomass raw materials in wheat straws

A technology for biomass raw materials and wheat straw, which is applied in the field of separation of agricultural and forestry biomass raw materials, can solve the problems of changing the chemical structure of lignin or cellulose, increasing equipment costs, environmental pollution, etc. Waste, the effect of solving environmental pollution

Inactive Publication Date: 2013-12-11
HENAN UNIV OF SCI & TECH
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] According to the existing research status, there are still serious defects or deficiencies in the separation technology of wheat straw: all components in wheat straw cannot be separated, resulting in waste of raw materials; although some separation methods can separate the three components, but in Corrosive or volatile chemical reagents are used in the process of wheat straw treatment or separation, which will change the chemical structure of lignin or cellulose, cause serious environmental pollution, or increase equipment costs due to the use of corrosion-resistant or high-pressure resistant equipment; some separation The separation reagent of the method cannot be effectively recovered or recycled, or even if the separation reagent can be recovered, the recovery method is complicated, which is not conducive to popularization and use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Separation device and process of biomass raw materials in wheat straws
  • Separation device and process of biomass raw materials in wheat straws
  • Separation device and process of biomass raw materials in wheat straws

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A separation process of biomass raw materials in wheat straw, comprising the following steps:

[0039] 1) Crush the wheat straw to 40 mesh and add it to the mixing tank, pour water into the mixing tank, and stir to obtain a mixed slurry;

[0040] 2) Pump the mixed slurry into the high-pressure hydrolysis kettle, control the pressure at 0.15Mpa, and hydrolyze for 30 minutes;

[0041] 3) Pump the hydrolyzed mixed material into the high-temperature static separator. After static separation at (90°C), the supernatant of the high-temperature static separator is pumped into the evaporation crystallizer through the liquid phase outlet, and then centrifuged The hemicellulose product is obtained after the separator; the recovered water for evaporative crystallization is reused in step 1).

[0042] 4) The solid material in the lower layer of the high-temperature static separator is pumped into the extraction tank through the solid phase outlet, and the aqueous soluti...

Embodiment 2

[0051] A separation process of biomass raw materials in wheat straw, comprising the following steps:

[0052] 1) Crush the wheat straw to 60 mesh and add it to the mixing tank, pour water into the mixing tank, and stir to obtain a mixed slurry;

[0053] 2) Pump the mixed slurry into the high-pressure hydrolysis kettle, control the pressure at 1.2Mpa, and hydrolyze for 10 minutes;

[0054] 3) Pump the hydrolyzed mixed material into the high-temperature static separator. After static separation at (90°C), the supernatant of the high-temperature static separator is pumped into the evaporation crystallizer through the liquid phase outlet, and then centrifuged The hemicellulose product is obtained after the separator; the recovered water for evaporative crystallization is reused in step 1).

[0055] 4) The solid material in the lower layer of the high-temperature static separator is pumped into the extraction tank through the solid phase outlet, and the aqueous solutio...

Embodiment 3

[0059] A separation process of biomass raw materials in wheat straw, comprising the following steps:

[0060] 1) Crush the wheat straw to 50 mesh and add it to the mixing tank, pour water into the mixing tank, and stir to obtain a mixed slurry;

[0061] 2) Pump the mixed slurry into the high-pressure hydrolysis kettle, control the pressure to 0.8Mpa, and hydrolyze for 20 minutes;

[0062] 3) Pump the hydrolyzed mixed material into the high-temperature static separator. After static separation at (90°C), the supernatant of the high-temperature static separator is pumped into the evaporation crystallizer through the liquid phase outlet, and then centrifuged The hemicellulose product is obtained after the separator; the recovered water for evaporative crystallization is reused in step 1).

[0063] 4) The solid material in the lower layer of the high-temperature static separator is pumped into the extraction tank through the solid phase outlet, and the aqueous solutio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a separation device and a process of biomass raw materials in wheat straws. The process comprises the following steps: (1) crushing the wheat straws, then adding the wheat straws into a mixing and stirring pool and adding water for stirring; (2) pumping mixed pulp into a high-pressure hydrolysis kettle for performing hydrolysis; (3) pumping the hydrolyzed mixed material into a high-temperature stand separator, evaporating, crystallizing and separating supernatant liquid to obtain hemicelluloses; (4) pumping a lower solid material of the high-temperature stand separator into an extraction pool and filtering the extracted lower solid material to obtain celluloses; (5) enabling supernatant liquid to enter an acid-base adjusting pool, adding acid, stirring, standing, separating, then transferring the lower solid material to a filter, and filtering to obtain a lignin product. Through the separation process disclosed by the invention, the biomass raw materials of various components in the wheat straws can be separated, so that the effective transformation and utilization of the components of the wheat straws can be realized, thus solving the problem of the incapability of separating the components in the traditional separation method and simultaneously avoiding the waste of resources.

Description

technical field [0001] The invention relates to the technical field of separation of agricultural and forestry biomass raw materials, in particular to a separation device and process for biomass raw materials in wheat straw. Background technique [0002] With the gradual reduction of reserves of fossil resources such as coal and petroleum, and the increase in the demand for energy and raw materials in various countries, relying solely on fossil resources can no longer meet the needs of economic and social development. Finding substitutes for fossil resources has become the current and future development. trend. my country is rich in wheat straw resources, with an annual output of about 150 million tons of wheat straw. If we can fully and efficiently utilize this abundant renewable resource and convert it into high-value products or energy, it will play an important role in supplementing the shortage of gradually decreasing fossil resources and promoting the sustainable deve...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/14C08H7/00D21C5/00
Inventor 许爱荣王键吉卢伟伟姚开胜张益波
Owner HENAN UNIV OF SCI & TECH