Biomass fiber continuous swelling technology and its special swelling equipment

A biomass fiber and puffing device technology, which is applied in the field of biomass development and utilization, can solve the problems of not being suitable for large-scale biomass fiber processing, large amounts of chemicals added, and harsh requirements, and achieve low overall cost of processes and devices , high working efficiency and mild operating conditions

Inactive Publication Date: 2004-11-03
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the puffing device is used for food and feed processing. It has two screw propulsion rods. The distance ratio of the starting section to the horizontal plane is 1:1, which is used as a feature to control the puffing process. Due to the small screw pitch and small feed volume, although it can work continuously, it is not suitable for large-scale biomass fiber processing, and requires a large amount of chemicals. demanding conditions

Method used

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  • Biomass fiber continuous swelling technology and its special swelling equipment
  • Biomass fiber continuous swelling technology and its special swelling equipment
  • Biomass fiber continuous swelling technology and its special swelling equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The continuous puffing treatment process that combines chemical pretreatment and high-pressure puffing treatment, the specific process is as follows:

[0024] 1. Chemical pretreatment: the rice straw is soaked in strong alkali NaOH (submerging the plant fiber amount) of 15% by volume percentage, and the soaking time is 20 hours, so as to weaken the chemical bond energy between the microfibers and lay the foundation for fiber expansion;

[0025] 2. Expansion treatment: using an expansion device, the chemically pretreated rice straw is pushed into a pressure forming chamber under the action of a high-pressure screw propulsion rod; in the pressure forming chamber, the temperature is adjusted by a thermal resistance heater to increase the temperature Up to 150°C, and make the water vapor pressure reach 15 kg, adjust the pH value to 8 with the strong alkali solution, spray out through the single hole of the puffing device, and puff;

[0026] When the jet flow is not smooth w...

Embodiment 2

[0032] The difference from Example 1 is:

[0033] Process:

[0034] 1. Chemical pretreatment: the wheat straw is soaked in 1% strong alkali KOH (submerging the plant fiber amount) with a percentage by weight, and the soaking time is 4 hours, so as to weaken the chemical bond energy between the microfibers and lay the foundation for fiber expansion;

[0035] 2. Expansion treatment: using an expansion device, push the chemically pretreated wheat straw into a pressure forming cavity with a high-pressure screw propulsion rod; in the pressure forming cavity, adjust the temperature through a thermal resistance heater to raise the temperature to 150°C, And make the water vapor pressure reach 1.5 kilograms, adjust the pH value to 7 with the strong alkali solution, spray out through the composite hole nozzle of the puffing device, and expand.

[0036] Special-purpose puffing device: as shown in Figures 1 and 3, the power source 1 is a diesel engine; the nozzle 8 is a composite hole no...

Embodiment 3

[0039] The difference from Example 1 is:

[0040] Process:

[0041] 1. Chemical pretreatment: Saw unused strong alkali NH with a volume percentage of 10% 4 OH soaking (submerging the amount of plant fibers), soaking time is 15 hours, to weaken the chemical bond energy between microfibers and lay the foundation for fiber expansion;

[0042] 2. Puffing treatment: using puffing device, push the chemically pretreated sawn into the pressure forming chamber with high-pressure screw propulsion rod; in the pressure forming chamber, adjust the temperature through the thermal resistance heater, and raise the temperature to 130°C , and make the water vapor pressure reach 3.5 kg; it is ejected through the composite hole nozzle of the puffing device, puffed.

[0043] Observed under a microscope, the degree of fiber damage reached 35-40%.

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Abstract

A process for continuously bulking biological fibres includes such steps as immersing the biological fibres in a solution of strong alkali for 3-24 hr, loading them into a pressure cavity by high-pressure bulking screw impeller, increasing the temp. to 100-160 deg.c and the pressure to 1.5-15 kg, regulating pH to 6-10 ejecting from the spout of the said impeller, and bulking. Its apparatus has 3 high-pressure impulsive screw arbors.

Description

technical field [0001] The invention relates to the development and utilization of biomass, in particular to a new technology for continuous expansion of biomass fibers and a special expansion device thereof. Background technique [0002] Biomass generally refers to all plants, and biomass as the research object generally refers to agricultural and forestry wastes, such as rice straw, wheat straw, corn straw and other crop straws. Biomass is known as the energy of tomorrow, and its development and utilization are imperative. It is of great significance in terms of waste resource recovery, energy structure conversion, and environmental protection. However, due to the particularity and complexity of the results of biomass fibers, the utilization of biomass is limited. Although some effective target products such as oil and ether can be obtained through pyrolysis, the efficiency is low and the environmental pollution is serious, which is not conducive to large-scale developmen...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): A23P30/30
Inventor李雪驼王海岩徐和利
OwnerDALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI