Crop straw crushing and sorting integrated device and method

The invention relates to a technology for crop straws and straws, which is applied in the field of crop straw man-made panels, and can solve the problems of affecting the bonding strength and surface quality of man-made panels, reducing the utilization rate of straw raw materials, and low screening efficiency, so as to improve the sorting effect and improve the sorting efficiency. The effect of good effect and improved appearance quality

Inactive Publication Date: 2019-03-26
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the fluffy volume of crop straw scraps (fibers), the units are easy to cross each other and agglomerate, and the crushed straw scraps (fibers) are easy to gather under the crusher, and the screening efficiency of coarse and fine materials through swing screens or roller screens is low. ,poor effect
Moreover, sand, rice grains, straw knots and other impurities in the straw debris (fiber) will damage the saw blades of the sawing machine in the subsequent cutting process of the board, and rice grains and straw knots will affect the wood-based panels. Internal bond strength and surface quality
When the sand, rice grains and straw knots in the straw are screened and removed by the swing screen or the roller screen, some fine straw fragments (fibers) that can be used in the production of straw wood-based panels will be removed at the same time, reducing the utilization rate of straw raw materials

Method used

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  • Crop straw crushing and sorting integrated device and method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0030] like figure 1As shown, an embodiment of the crop straw crushing and sorting integrated device of the present invention includes a straw crusher 1 and a centrifugal separator group 2 . Wherein, a screen 5 is provided directly under the straw crusher 1; the centrifugal separator group 2 includes a first centrifugal separator 21, a second centrifugal separator 22 and a third centrifugal separator 23 connected in sequence, and the first centrifugal separator The lower parts of the device 21, the second centrifugal separator 22 and the third centrifugal separator 23 are all provided with a one-way discharge valve 4. The first centrifugal separator 21 is connected to the bottom of the straw crusher 1 through an air pipe, and the third centrifugal separator 23 is connected to the induced draft fan 3 through an air pipe. The straw crusher 1 is connected with the sorting device (centrifugal separator group 2). After the straw is crushed by the straw crusher 1, the straw is init...

Embodiment 2

[0033] An embodiment of the crop straw crushing and sorting integrated method of the present invention comprises the following steps:

[0034] (1) Start the induced draft fan 3, the one-way discharge valve 4 at the bottom of the three centrifugal separators and the driving motor of the straw crusher 1 in sequence.

[0035] (2) The straw is sent into the straw crusher 1 from the upper feed port of the straw crusher 1 with a power of 90kW according to the conveying speed of 1.5 tons per hour; To the screen cloth 5 that mesh diameter is 8mm; Under the effect of negative pressure, rice straw fragment enters the first centrifugal separator 21 that cylindrical body diameter is 2000mm by the mesh of screen cloth 5 and air duct; The large-grain straw fragments (below 10 mesh), sand grains, rice grains, and straw knots that cannot be used for the production of straw-based panels will be separated together under the action of the first centrifugal separator 21. The power at the bottom o...

Embodiment 3

[0045] An embodiment of the crop straw crushing and sorting integrated method of the present invention comprises the following steps:

[0046] (1) Start the induced draft fan 3, the one-way discharge valve 4 at the bottom of the three centrifugal separators and the driving motor of the straw crusher 1 in sequence.

[0047] (2) The wheat straw is sent into the straw crusher 1 from the upper feed port of the straw crusher 1 with a power of 75kW according to the conveying speed of 1.2 tons per hour; To the screen cloth 5 that mesh diameter is 10mm; Under the effect of negative pressure, the wheat straw scrap enters the first centrifugal separator 21 that cylindrical device body diameter is 1800mm by the mesh of screen cloth 5 and air duct; Under the action of the large particle wheat straw debris (below 10 mesh) that can not be used for wheat straw wood-based panel production and sand grain, wheat grain, wheat straw knot etc. are separated together, the power that is positioned a...

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Abstract

The invention discloses a crop straw crushing and sorting integrated device and method. The device comprises a straw crusher and a sorting device. The straw crusher is connected with one end of the sorting device through an air pipe. The other end of the sorting device is connected with an induced draft fan through an air pipe. The sorting device is a centrifugal separator set. The centrifugal separator set comprises a first centrifugal separator, a second centrifugal separator and a third centrifugal separator which are connected in sequence. The straw crusher is connected with the first centrifugal separator through an air pipe. The third centrifugal separator is connected with the induced draft fan through an air pipe. By the adoption of the crop straw crushing and sorting integrated device, the production efficiency of crop straw artificial boards is greatly improved, the utilization rate of crushed aggregates is greatly increased, and the artificial boards made of the crushed aggregates obtained through the device are high in internal bond strength and good in surface quality.

Description

technical field [0001] The invention belongs to the technical field of crop straw man-made board manufacturing, and in particular relates to an integrated device and method for crushing and sorting crop straws. Background technique [0002] The crop straw wood-based panel is a kind of composite material prepared by cold pressing or hot pressing process with crop straw scraps (fiber) and inorganic adhesive or organic adhesive as the main raw materials. The two key processes in the material preparation section of the production of crop straw wood-based panels are straw crushing and sorting of coarse and fine materials for the core and surface of straw wood-based panels. [0003] The two processes of straw crushing and coarse and fine material sorting in the existing crop straw wood-based panel production process are usually independent. The crop straw crushing is realized by a straw crusher, and the crushed straw debris (fiber) is coarse, Fine material sorting is usually achi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C18/14B02C23/08B02C23/14B02C23/16
CPCB02C18/14B02C23/08B02C23/14B02C23/16B02C2023/165
Inventor 郑霞李新功吴义强
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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