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A kind of method for removing pulp by wet method of corn stalk

A corn stalk, wet process technology, applied in papermaking, textile and papermaking, fiber raw material processing and other directions, can solve the problem of difficult separation of skin and pith, and achieve improved feed intake and digestibility, good palatability, and good air permeability. Effect

Active Publication Date: 2019-03-01
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the skin and pith are difficult to separate in the current corn stalk papermaking process, and to provide a wet method for removing pith from corn stalks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0016] Specific implementation mode one: corn stalk wet pitting is carried out according to the following steps:

[0017] 1. Cut corn stalks;

[0018] 2. Use a hydraulic pulper to unclog the cut corn stalks to obtain corn stalk pulp;

[0019] 3. Screen and filter the corn stalk pulp with a pulp sifter to obtain the corn stalk pulp;

[0020] 4. Concentrate and dehydrate the corn stalk slurry with a pulper to obtain the corn stalk husk after pitting.

[0021] The method of this embodiment has no requirement on the diameter of the corn stalks, which can save the screening section for raw materials. All the water used in the method of this embodiment can be recycled and reused directly, which saves a lot of water resources.

specific Embodiment approach 2

[0022] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in Step 1, the corn stalks are cut to a length of 2±0.2 cm. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0023] Embodiment 3: The differences between this embodiment and Embodiment 1 or 2 are: the mass concentration of corn stalks in the hydropulper in Step 2 is 6%-8%, and the rotor speed is 1200-1800r / min. Other steps and parameters are the same as those in Embodiment 1 or 2.

[0024] In step 2 of this embodiment, the pulping temperature is normal temperature, and the pulping and dissolving time is 1 to 5 minutes.

[0025] In the method of this embodiment, the strength difference of the pith is used to break the pith of the corn stalk into small particles, and the particle size of the pith particles is reduced as much as possible, so that it can be dispersed and removed in water. The method of this embodiment can protect the vascular tissue in the corn stalk husk from being damaged.

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PUM

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Abstract

The invention discloses a wet depithing method for corn straw, relates to a wet depithing method for straw, and solves the problem of difficulty in separating peel from pith in existing corn straw papermaking procedures. The wet depithing method for corn straw includes: firstly, shearing the corn straw; secondly, defibering the sheared corn straw by the aid of a hydraulic pulper to obtain corn straw pulp; thirdly, screening and filtering the corn straw pulp by the aid of pulp screens to obtain corn straw slurry; fourthly, concentrating and dehydrating the corn straw slurry by the aid of a slurry squeezing machine. The wet depithing method has the advantages that the depithing rate of the wet depithing method is 85%-92%, and the depithing effect is obviously 10-20% higher than that of existing depithing dry methods, semi-wet methods and wet methods and existing pith scraping machines for sugarcane.

Description

technical field [0001] The invention relates to a straw wet pulp removal method. Background technique [0002] As a by-product of my country's main crop corn, corn stalks have an annual output of up to 250 million tons. At present, most of the corn stalks are burned on the spot, which not only causes a lot of waste of straw resources, but also leads to the use of corn stalks in animal husbandry and further rational development and utilization. The rate is very low, and it causes huge pollution to the environment. Due to the special components of corn stalks, transportation costs and storage difficulties, resource utilization is not strong. [0003] The fiber component in corn straw mainly exists in the outer skin of rice straw, which has high strength and good toughness, and its performance is similar to that of reed, so it should be a good material for making paper; therefore, corn straw papermaking is the first choice for recycling straw resources A new way out. In the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21B1/06D21B1/34D21D5/02D21C3/00
CPCD21B1/061D21B1/345D21C3/00D21D5/02
Inventor 岳金权赵银玲张阳阳郑丁源
Owner NORTHEAST FORESTRY UNIVERSITY