Method for processing biological particles using lignin in paper-making waste liquid

A technology of biomass particles and papermaking waste liquid, which is applied in the direction of wood processing appliances, hollow objects, applications, etc., can solve the problems of rare utilization, and achieve the effects of reducing pollution, enhancing bonding, improving durability and relaxation density

Inactive Publication Date: 2007-11-14
SHENYANG INST OF ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Papermaking black liquor contains a large amount of lignin, but so far, more than 95% of lignin is still used as paper pulping waste, which is directly discharged into rivers with wastewater or burned after being concentrated, and is rarely used.

Method used

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  • Method for processing biological particles using lignin in paper-making waste liquid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Biomass pellets are made from bark and lignin with a moisture content of less than 20% by the following steps:

[0018] 1. Pulverization: The bark is pulverized by a pulverizer and processed into a fine powder of more than 35 mesh.

[0019] Mixing: the bark fine powder and lignin are in the following weight ratio: fine powder 74%, lignin 18%, water 8%, and mix evenly.

[0020] Granulation: low-pressure extrusion molding at room temperature, the molding can use screw extrusion technology, piston extrusion technology and roller molding technology.

[0021] Drying: The formed biomass particles are heated and dried to enhance their strength.

[0022] 2. Crushing: The bark is crushed by a pulverizer and processed into particles below 35 mesh and above 15 mesh.

[0023] Mixing: the bark particles and lignin are mixed in the following weight ratio: 60% of particles, 30% of lignin, and 10% of water. well mixed.

[0024] Granulation: low-pressure extrusion molding at room te...

Embodiment 2

[0033] The processing steps of embodiment 2 are basically the same as that of embodiment 1, the difference is that the biomass particles of embodiment 2 are made of branches and lignin with a water content lower than 20%.

Embodiment 3

[0035] The processing steps of Example 3 are basically the same as those of Example 1, the difference being that the biomass particles of Example 3 are made of wood chips and lignin with a water content lower than 20%.

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Abstract

A method to process biomass pellets by using lignin in pulping waste liquor relates to molding technique of biomass pellets. It takes grinding matters of barks, branches, genus aralias, sawdust, straw, rice husk and bagasse as materials and adopts lignin distilled from pulping waste liquor as bond. They are mixed and pressed under normal temperature and low pressure for molding. The weight ratio of them is: biomass materials 40%-98% and lignin 1%-50%. Mix them and add some water. The pellets in this invention take natural and renewable crops as main materials and add combustibles-lignin as bond, which increases the burning heat and reduces the environmental pollution and energy consumption.

Description

technical field [0001] The invention relates to a biomass pellet forming technology, in particular to a method for processing biomass pellets by using lignin in papermaking waste liquid. Background technique [0002] At present, the fuels commonly used in production are mostly fossil fuels such as coal, oil, and natural gas. These are non-renewable energy sources. Due to a large number of mining and use, the fuel reserves have declined sharply, and they have now constituted the basis for the development of human existence today. One of the three major crises, the development of a new type of energy to replace fossil energy is imminent. [0003] Biomass pellet fuel is a new type of energy, mainly used for gasification and combustion. As a large agricultural country, my country is rich in biomass resources. In the rural areas of our country, a large amount of agricultural straw and grain husks are discarded or rotted by themselves every year, and some are directly incinerated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N5/00
Inventor 徐有宁张小勇刘悦刘雨菂蔡云平
Owner SHENYANG INST OF ENG
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