1. A method for efficiently recovering and treating pine wood nematode infected wood is characterized by comprising the following steps: the method comprises the following steps:

step one, sorting epidemic trees: cutting the epidemic trees into original wood sections of 1400-1600 mm by using an electric saw, removing tips and branches by using the electric saw, classifying according to the diameter of the original wood sections, and placing unusable waste materials such as tips, branches, sawdust and barks in an iron bucket for later use;

step two, processing the single plate: rotary-cutting the log section into a single board with the thickness of 2-4 mm along the length direction by using a single board rotary cutter without a clamping shaft;

step three, single plate sorting: sorting and cutting the veneer after rotary cutting, drying the qualified veneer, and placing sawdust and unqualified veneer waste into an iron bucket for later use;

step four, preprocessing the qualified veneer: preparing 25-30% of flame retardant liquid, placing the qualified veneer in the flame retardant liquid for dipping treatment for 5-7 h, and drying at the temperature of 75-85 ℃ until the water content is 8% -10%;

step five, qualified single-plate assembly of blanks: carrying out double-sided gluing on the pretreated qualified single board, and assembling the glued single board into a blank, wherein the number of the single board layers is singular and at least 3;

step six, pressing and warehousing: putting the obtained group blank into a cold press for cold pressing treatment, taking out after cold pressing, putting into a hot press for hot-pressing gluing, taking out after hot-pressing gluing, placing indoors, cooling to room temperature, inspecting and warehousing;

step seven, waste processing: crushing the waste collected in the iron bucket to prepare a mixed material, then heating the crushed mixed material in carbonization equipment, and performing thermal decomposition to prepare a carbon product raw material.

2. The method for efficiently recovering and treating the pine wood nematode infected wood according to claim 1, is characterized in that: in the third step, the drying temperature is 75-85 ℃, and the qualified veneer needs to be dried until the water content is 6-10%.

3. The method for efficiently recovering and treating the pine wood nematode infected wood according to claim 1, is characterized in that: in the third step, the sorting method of the veneers specifically comprises the steps of selecting one surface with the most wormholes in the veneers for metering, cutting the veneers into 1300 x 1260mm specification when the number of the wormholes is 10-30, cutting the veneers into 1300 x 430mm specification when the number of the wormholes is 30-50, and placing the veneers into an iron bucket if the number of the wormholes is more than 50, wherein the veneers are unqualified.

4. The method for efficiently recovering and treating the pine wood nematode infected wood according to claim 1, is characterized in that: in the fourth step, the flame retardant liquid consists of the following components in parts by weight: 7-12 parts of tributyl phosphate; 10-16 parts of nitric acid; 6-10 parts of aluminum hydroxide; 8-12 parts of borate; 80-130 parts of water.

5. The method for efficiently recovering and treating the pine wood nematode infected wood according to claim 1, is characterized in that: in the fifth step, the glue coating amount is 350-400 g/m²。

6. The method for efficiently recovering and treating the pine wood nematode infected wood according to claim 1, is characterized in that: in the fifth step, the grain directions of every two adjacent layers of single plates are crosswise and vertical, the single plate joint is tightly attached as much as possible when assembling, and the single plates cannot be overlapped or have gaps.

7. The method for efficiently recovering and treating the pine wood nematode infected wood according to claim 1, is characterized in that: in the sixth step, cold pressing is carried out under the condition of 1.1-1.3 MPa, the aging time is 100-180 min, hot pressing is carried out under the conditions of the temperature of 110-115 ℃ and the pressure of 1.1-1.3 MPa, and the hot pressing time is 12-18 min.

Background

Pine wilt disease, also known as pine wilt, is a devastating epidemic of pine, and is a disease caused by pine nematodes (Bursaphelenchus xylophilus) which can cause extensive withering of pine such as masson pine. Up to now in 1982, over 5000 million strains of Pinus massoniana have been caused to become epidemic trees. Pine wilt disease is extremely spread and devastating, and can cause thousands of economic losses. According to a pine wood nematode disease area and a wood epidemic management method (revised by the State forest and grass Bureau in 2018), the direct effective measure mainly adopted for controlling the pine wood nematode disease at present is to cut down the diseased wood and grind (chipping) or burn the diseased wood on site to prevent the healthy pinus massoniana from infecting the pine wood nematode disease. However, if the felling trees are not scientifically processed, the waste of resources and the secondary spread of disease sources can be caused. Therefore, how to treat the great amount of fell disease infected trees, improve the resource recycling value and prevent the secondary diffusion of the fell disease infected trees becomes a hot problem of research.

At present, the main methods for treating the epidemic trees comprise in-situ burning, heat treatment, microwave treatment and the like. Although the treatment methods have certain success and recover part of loss, the treatment methods cause serious pollution to the environment and consume a large amount of energy, so the method for efficiently recovering and treating the pine wood nematode infected wood is provided.

Disclosure of Invention

The invention mainly aims to provide a method for efficiently recovering and treating pine wood nematode infected trees, which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

a method for efficiently recovering and treating pine wood nematode infected wood comprises the following steps:

step one, sorting epidemic trees: cutting the epidemic trees into original wood sections of 1400-1600 mm by using an electric saw, removing tips and branches by using the electric saw, classifying according to the diameter of the original wood sections, and placing unusable waste materials such as tips, branches, sawdust and barks in an iron bucket for later use;

step two, processing the single plate: rotary-cutting the log section into a single board with the thickness of 2-4 mm along the length direction by using a single board rotary cutter without a clamping shaft;

step three, single plate sorting: sorting and cutting the veneer after rotary cutting, drying the qualified veneer, and placing sawdust and unqualified veneer waste into an iron bucket for later use;

step four, preprocessing the qualified veneer: preparing 25-30% of flame retardant liquid, placing the qualified veneer in the flame retardant liquid for dipping treatment for 5-7 h, and drying at the temperature of 75-85 ℃ until the water content is 8% -10%;

step five, qualified single-plate assembly of blanks: carrying out double-sided gluing on the pretreated qualified single board, and assembling the glued single board into a blank, wherein the number of the single board layers is singular and at least 3;

step six, pressing and warehousing: putting the obtained group blank into a cold press for cold pressing treatment, taking out after cold pressing, putting into a hot press for hot-pressing gluing, taking out after hot-pressing gluing, placing indoors, cooling to room temperature, inspecting and warehousing;

step seven, waste processing: crushing the waste collected in the iron bucket to prepare a mixed material, then heating the crushed mixed material in carbonization equipment, and performing thermal decomposition to prepare a carbon product raw material.

Preferably, in the third step, the drying temperature is 75-85 ℃, and the qualified veneers need to be dried until the water content is 6-10%.

Preferably, in the third step, the sorting method of the veneers specifically includes selecting one surface with the most wormholes in the veneers for metering, when the number of the wormholes is 10-30, cutting the veneers into 1300 x 1260mm specification, when the number of the wormholes is 30-50, cutting the veneers into 1300 x 430mm specification, when the number of the wormholes is more than 50, the veneers are unqualified, and the veneers need to be placed in an iron bucket.

Preferably, in the fourth step, the flame retardant liquid consists of the following components in parts by weight: 7-12 parts of tributyl phosphate; 10-16 parts of nitric acid; 6-10 parts of aluminum hydroxide; 8-12 parts of borate; 80-130 parts of water.

Preferably, in the fifth step, the glue coating amount is 350-400 g/m²。

Preferably, in the fifth step, the grain directions of every two adjacent layers of single plates are crosswise and vertical, and the joints of the single plates are as close as possible when assembling, and cannot be superposed or have gaps.

Preferably, in the sixth step, the cold pressing is performed under the condition of 1.1-1.3 MPa, the aging time is 100-180 min, the hot pressing is performed under the conditions of the temperature of 110-115 ℃ and the pressure of 1.1-1.3 MPa, and the hot pressing time is 12-18 min.

Preferably, the wooden plug is sterilized.

Compared with the prior art, the invention has the following beneficial effects:

1. in the invention, through multi-process treatment, pine wood nematode infected wood can be made into plywood with better quality, so that forest resources are saved, and the obtained plywood has the characteristics of thorough insecticidal treatment, high strength and low production cost.

2. In the invention, the fire-retardant liquid composed of specific components is permeated into the cell cavities, cell walls and intercellular spaces of the epidemic trees through an impregnation process, so that the fire resistance of the plywood is improved, and meanwhile, tributyl phosphate and nitric acid in the fire-retardant liquid can kill the pine wood nematodes remained in the wormholes, thereby ensuring thorough pest killing.

3. In the invention, the residual waste is crushed and carbonized to prepare the carbon product raw material, thereby changing waste into valuable, increasing economic benefit, reducing environmental pollution, killing nematodes and vector insects in the infected wood during carbonization, effectively preventing the spread and spread of diseases, and the pest-removing effectiveness can reach 100%.

4. The method is simple, convenient and practical, has low investment and low treatment cost, and has high economic benefit.

Drawings

FIG. 1 is a flow chart of the method for efficiently recovering and treating pine wood nematode infected trees of the present invention.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

As shown in fig. 1, a method for efficiently recovering and treating pine wood nematode infected wood comprises the following steps:

step one, sorting epidemic trees: cutting the epidemic trees into 1400 log sections by an electric saw, removing tips and branches by the electric saw, classifying according to the diameter of the log sections, and placing unusable waste materials such as tips, branches, sawdust and barks in an iron bucket for later use;

step two, processing the single plate: a veneer rotary cutter without a clamping shaft is used for rotary cutting the log section along the length direction into veneers with the thickness of 2 mm;

step three, single plate sorting: the veneer after rotary cutting is sorted and cut, the specific sorting method of the veneer comprises the steps of selecting one surface with the most wormholes in the veneer for metering, when the number of the wormholes is 10-30, cutting the veneer into 1300 x 1260mm specification, when the number of the wormholes is 30-50, cutting the veneer into 1300 x 430mm specification, when the number of the wormholes is more than 50, the veneer is unqualified, placing the veneer in an iron bucket, drying the qualified veneer, wherein the drying temperature is 75 ℃, the qualified veneer needs to be dried to the moisture content of 6%, and placing sawdust and unqualified veneer waste in the iron bucket for later use;

step four, preprocessing the qualified veneer: preparing 25% flame retardant liquid, wherein the flame retardant liquid comprises the following components in parts by weight: 7 parts of tributyl phosphate; 10 parts of nitric acid; 6 parts of aluminum hydroxide; 8 parts of borate; 80 parts of water, soaking the qualified veneer in flame retardant liquid for 5 hours, and drying at the temperature of 75 ℃ until the water content is 8%;

step five, qualified single-plate assembly of blanks: carrying out double-sided gluing on the pretreated qualified veneer, wherein the gluing amount is 350g/m²Assembling the glued single boards, wherein the number of the single boards is odd and is at least 3, and the grain directions of every two adjacent single boards are crosswise and perpendicularStraight, the single board joint is tightly attached as much as possible when assembling, and no superposition or gap exists;

step six, pressing and warehousing: putting the obtained group blank into a cold press for cold pressing treatment, taking out after cold pressing, putting into a hot press for hot pressing gluing, taking out after hot pressing gluing, placing indoors and cooling to room temperature, inspecting and warehousing, performing cold pressing under the condition of 1.1MPa for 100min, performing hot pressing at the temperature of 110 ℃ and the pressure of 1.1MPa for 12 min;

step seven, waste processing: crushing the waste collected in the iron bucket to prepare a mixed material, then heating the crushed mixed material in carbonization equipment, and performing thermal decomposition to prepare a carbon product raw material.

Example two

As shown in fig. 1, a method for efficiently recovering and treating pine wood nematode infected wood comprises the following steps:

step one, sorting epidemic trees: cutting the epidemic trees into original wood sections of 1600mm by an electric saw, removing tips and branches by the electric saw, classifying according to the diameter of the original wood sections, and placing unusable waste materials such as tips, branches, sawdust, barks and the like into an iron bucket for later use;

step two, processing the single plate: a veneer rotary cutter without a clamping shaft is used for rotary cutting the log section along the length direction into veneers with the thickness of 4 mm;

step three, single plate sorting: the veneer after rotary cutting is sorted and cut, the specific sorting method of the veneer comprises the steps of selecting one surface with the most wormholes in the veneer for metering, when the number of the wormholes is 10-30, cutting the veneer into 1300 x 1260mm specification, when the number of the wormholes is 30-50, cutting the veneer into 1300 x 430mm specification, when the number of the wormholes is more than 50, the veneer is unqualified, placing the veneer in an iron bucket, drying the qualified veneer, wherein the drying temperature is 85 ℃, the qualified veneer needs to be dried to the moisture content of 10%, and placing sawdust and unqualified veneer waste in the iron bucket for later use;

step four, preprocessing the qualified veneer: preparing 30% flame retardant liquid, wherein the flame retardant liquid comprises the following components in parts by weight: 12 parts of tributyl phosphate; 16 parts of nitric acid; 10 parts of aluminum hydroxide; 12 parts of borate; 130 parts of water, soaking the qualified veneer in flame retardant liquid for 7 hours, and drying at 85 ℃ until the water content is 10%;

step five, qualified single-plate assembly of blanks: carrying out double-sided gluing on the pretreated qualified single board, wherein the gluing amount is 400g/m²Assembling the glued single boards, wherein the number of the single boards is singular and at least 3, the grain directions of every two adjacent single boards are crosswise and vertical, and the splicing seams of the single boards are tightly attached as much as possible and cannot be overlapped or have gaps when assembling;

step six, pressing and warehousing: putting the obtained group blank into a cold press for cold pressing treatment, taking out after cold pressing, putting into a hot press for hot pressing gluing, taking out after hot pressing gluing, placing indoors and cooling to room temperature, inspecting and warehousing, performing cold pressing under the condition of 1.3MPa for 180min, performing hot pressing at the temperature of 115 ℃ and the pressure of 1.3MPa for 18 min;

step seven, waste processing: crushing the waste collected in the iron bucket to prepare a mixed material, then heating the crushed mixed material in carbonization equipment, and performing thermal decomposition to prepare a carbon product raw material.

EXAMPLE III

As shown in fig. 1, a method for efficiently recovering and treating pine wood nematode infected wood comprises the following steps:

step one, sorting epidemic trees: cutting the epidemic trees into log sections of 1500mm by an electric saw, removing tips and branches by the electric saw, classifying according to the diameter of the log sections, and placing unusable waste materials such as tips, branches, sawdust, barks and the like into an iron bucket for later use;

step two, processing the single plate: a veneer rotary cutter without a clamping shaft is used for rotary cutting the log section along the length direction into a veneer with the thickness of 3 mm;

step three, single plate sorting: the veneer after rotary cutting is sorted and cut, the specific sorting method of the veneer comprises the steps of selecting one surface with the most wormholes in the veneer for metering, when the number of the wormholes is 10-30, cutting the veneer into 1300 x 1260mm specification, when the number of the wormholes is 30-50, cutting the veneer into 1300 x 430mm specification, when the number of the wormholes is more than 50, the veneer is unqualified, placing the veneer in an iron bucket, drying the qualified veneer, wherein the drying temperature is 80 ℃, the qualified veneer needs to be dried to the moisture content of 8%, and placing sawdust and unqualified veneer waste in the iron bucket for later use;

step four, preprocessing the qualified veneer: preparing 25-30% of flame retardant liquid, wherein the flame retardant liquid comprises the following components in parts by weight: 10 parts of tributyl phosphate; 13 parts of nitric acid; 8 parts of aluminum hydroxide; 10 parts of borate; 105 parts of water, soaking the qualified veneer in flame retardant liquid for 6 hours, and drying at the temperature of 80 ℃ until the water content is 9%;

step five, qualified single-plate assembly of blanks: carrying out double-sided gluing on the pretreated qualified single board, wherein the gluing amount is 375g/m²Assembling the glued single boards, wherein the number of the single boards is singular and at least 3, the grain directions of every two adjacent single boards are crosswise and vertical, and the splicing seams of the single boards are tightly attached as much as possible and cannot be overlapped or have gaps when assembling;

step six, pressing and warehousing: putting the obtained group blank into a cold press for cold pressing treatment, taking out after cold pressing, putting into a hot press for hot pressing gluing, taking out after hot pressing gluing, placing indoors and cooling to room temperature, inspecting and warehousing, performing cold pressing under the condition of 1.2MPa for 140min, performing hot pressing at the temperature of 113 ℃ and the pressure of 1.2MPa for 15 min;

step seven, waste processing: crushing the waste collected in the iron bucket to prepare a mixed material, then heating the crushed mixed material in carbonization equipment, and performing thermal decomposition to prepare a carbon product raw material.

The three groups of embodiments can carry out efficient recovery processing on the pine wood nematode infected wood, after multi-process processing, the obtained plywood has the characteristics of thorough insecticidal processing, high strength and low production cost, the rest waste materials are crushed, and then carbonized to prepare the carbon product raw material, thereby changing waste into valuable, increasing economic benefit, reducing environmental pollution, eliminating nematodes and vector insects in the infected wood in the carbonization process, effectively preventing the spread and spread of the disease, and achieving the pest removal effectiveness of 100 percent.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.