Method for dipping-high-temperature heat treatment of wood by using compound mildew-proof preservative solution

Abstract

The invention discloses a method for dipping and high-temperature heat treatment of wood through a compound mildew-proof preservative solution, and relates to the technical field of wood preservative treatment, and the method comprises the following steps: firstly carrying out wood pretreatment, then carrying out mildew-proof preservative solution soaking treatment, then carrying out high-temperature heat treatment, and finally carrying out quality inspection and surface treatment on the wood. According to the method, the wood is soaked in the mildew-proof preservative solution, so that growth of microorganisms such as fungi, bacteria and insects is effectively killed and inhibited, and the corrosion resistance of the wood is remarkably improved; through high-temperature heat treatment, mildew-proof components in the wood are more stable and not prone to loss, and therefore the mildew-proof period of the wood is prolonged; the molecular structure in the wood is recombined through high-temperature heat treatment, the internal stress is reduced, and the dimensional stability and deformation resistance of the wood are improved; in the heat treatment process, cellulose, lignin and other components of the wood are chemically changed, so that the hardness of the wood is enhanced, and the wear resistance and durability of the wood are improved.

Description

Technical Field

[0001] The invention relates to the technical field of wood antiseptic treatment, in particular to a method for impregnating and heat treating wood with a composite anti-mildew and antiseptic liquid at a high temperature. Background Art

[0002] Wood antiseptic treatment is an indispensable process step to ensure the long-term use of wood outdoors or in humid environments. Its necessity lies in significantly improving the durability and stability of wood. As a natural material, wood is susceptible to various factors such as moisture, decay, and insect pests, which lead to its strength loss and shortened service life. Therefore, a method of impregnating wood with a composite anti-mildew and antiseptic liquid and performing high-temperature heat treatment was proposed. Summary of the invention

[0003] The purpose of the present invention is to provide a method for impregnating and heat treating wood with a composite anti-mildew and anti-corrosion liquid at high temperature, so as to solve the problem that wood is easily affected by various factors such as moisture, decay, and insect pests, resulting in reduced strength and shortened service life as mentioned in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a method for impregnating and high-temperature heat treating wood with a composite anti-mildew and anti-corrosion liquid, comprising the following steps: S1. Wood pretreatment; S2, soaking treatment with anti-mildew and anti-corrosion liquid; S3, high temperature heat treatment; S4. Post-processing.

[0005] Preferably, the wood pretreatment comprises the following steps: S11, preliminarily dry the wood and control the moisture content of the wood to 8% to 12%; S12. Modify the wood, remove the bark, knots and unify the length and width; S13. Stack the wood on the pallet in sequence, in a staggered arrangement, leaving gaps between each layer of wood, and stack the wood into piles.

[0006] Preferably, the mildew and antiseptic liquid immersion treatment comprises the following steps: S21, add the mildew and corrosion prevention solution prepared by ACQ and water into the soaking tank, the ratio of ACQ to water is 1:12-15; S22, during the soaking process, the soaking liquid is continuously circulated by a water pump; S23. After the soaking is completed, the wood is drained, excess soaking liquid is removed, and then the drained wood is dried.

[0007] Preferably, the high temperature heat treatment comprises the following steps: S31. Before heat treatment, trim the wood again to ensure that the wood surface is flat and free of defects; S32, heating stage, starting from room temperature and gradually heating up to the target treatment temperature in stages according to the type and thickness of the wood; S33. During the insulation stage, the temperature should be kept within the target treatment temperature range, i.e., 180°C to 250°C, and the temperature fluctuation should be controlled within a certain range to ensure the stability and consistency of the treatment effect; S34. During the cooling stage, the temperature should be gradually reduced from the target treatment temperature in the insulation stage to room temperature. The cooling rate should not be too fast to avoid cracks or deformation of the wood due to rapid cooling.

[0008] Preferably, the post-processing comprises the following steps: S41. Quality inspection: Conduct quality inspection on heat-treated wood; S42. Surface treatment: Carry out necessary surface treatment on the heat-treated wood as required.

[0009] In the present invention, by soaking in the anti-mildew and anti-corrosion liquid, the effective ingredients in the anti-mildew and anti-corrosion liquid can penetrate into the interior of the wood, effectively kill and inhibit the growth of microorganisms such as fungi, bacteria, insects, etc., and significantly improve the anti-corrosion performance of the wood; after high-temperature heat treatment, the anti-mildew components inside the wood are more stable and not easy to lose, thereby extending the anti-mildew period of the wood; high-temperature heat treatment reorganizes the molecular structure inside the wood, reduces internal stress, and improves the dimensional stability and deformation resistance of the wood; during the heat treatment process, components such as cellulose and lignin of the wood undergo chemical changes, thereby enhancing the hardness of the wood and improving its wear resistance and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The present invention is a process flow chart of a method for impregnating and high-temperature heat treating wood with a composite anti-mildew and anti-corrosion liquid. DETAILED DESCRIPTION

[0011] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0012] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] Example See also Figure 1 As shown, a method for impregnating and high-temperature heat treating wood with a composite anti-mildew and anti-corrosion liquid comprises the following steps: Step 1: Wood pretreatment; Specifically, the wood is first dried preliminarily, and the moisture content of the wood is controlled at 8% to 12% to ensure effective penetration of the anti-mildew and anti-corrosion liquid. The wood is then trimmed, peeled, knotted, and the length and width are unified. The wood is then stacked on the pallet in sequence, one layer vertically and one layer horizontally, in an alternating manner, with gaps left between each layer, and the wood is stacked into piles. If it is cylindrical wood, the surface of the wood is trimmed, and two axially symmetrical planes are trimmed on the outer surface of the wood to facilitate stacking.

[0015] Step 2: Soaking in anti-mildew and antiseptic liquid; Specifically, stacked wood is placed in a soaking pool, and an anti-mildew and anti-corrosion solution prepared by ACQ and water is added into the soaking pool, with the ratio of ACQ to water being 1:12-15. During the soaking process, the soaking liquid is continuously circulated by a water pump, and the soaking liquid flows through the gaps reserved when the wood is stacked to ensure that all parts of the wood can be evenly soaked, and the soaking time is not less than 12 hours. After the soaking is completed, the wood is drained to remove excess soaking liquid, and then the drained wood is dried to remove excess moisture in the wood and prevent the preservative liquid from crystallizing or precipitating inside the wood.

[0016] Step 3: high temperature heat treatment; Specifically, before heat treatment, the wood is trimmed again to ensure that the wood surface is flat and flawless. The wood is heat treated by heat treatment equipment. During the heating stage, the temperature is gradually increased from room temperature, with the starting temperature being 60°C to 75°C. Then, according to the type and thickness of the wood, the temperature is gradually increased in stages to the target treatment temperature. The target treatment temperature is generally between 180°C and 250°C, depending on the type of wood, the purpose of heat treatment and subsequent use requirements. The heating rate should not be too fast, and it should be uniform and stable to avoid cracks or deformation of the wood due to rapid heating. After heating, it is kept warm, and the temperature during the insulation stage should be maintained at the target treatment temperature. The temperature should be within the range of 180℃ to 250℃. The temperature fluctuation should be controlled within a certain range to ensure the stability and consistency of the treatment effect. The insulation time needs to be 2 to 6 hours to make the temperature inside the wood evenly distributed. At the same time, ensure that the preservative liquid can stably play an anti-corrosion role at high temperature. After insulation, the temperature should be cooled. The temperature in the cooling stage should be gradually reduced from the target treatment temperature in the insulation stage to room temperature. The cooling rate should not be too fast to avoid cracks or deformation of the wood due to rapid cooling. The cooling process may take several hours to more than ten hours. During the cooling process, open the ventilation system of the heat treatment equipment to accelerate the cooling and discharge the volatile substances released by the wood.

[0017] Step 4: Post-processing; Specifically, after heat treatment, the treated wood is subjected to quality inspection, including tests on anti-corrosion performance, dimensional stability, mechanical properties, etc., to ensure that the wood quality meets relevant standards and requirements. As needed, the heat-treated wood is subjected to necessary surface treatment, such as sanding, painting, etc., to improve the aesthetics and durability of the wood.

[0018] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for impregnating and heat treating wood with a composite anti-mildew and anti-corrosion liquid, characterized in that: The following steps are involved: S1. Wood pretreatment; S2, soaking treatment with anti-mildew and anti-corrosion liquid; S3, high temperature heat treatment; S4. Post-processing.

2. The method for impregnating and heat treating wood with a composite mildew and antiseptic liquid according to claim 1, characterized in that: In step S1, the wood pretreatment comprises the following steps: S11, preliminarily dry the wood and control the moisture content of the wood to 8% to 12%; S12. Modify the wood, remove the bark, knots and unify the length and width; S13. Stack the wood on the pallet in sequence, in a staggered arrangement, leaving gaps between each layer of wood, and stack the wood into piles.

3. The method for impregnating and heat treating wood with a composite mildew and antiseptic liquid according to claim 1, characterized in that: In step S2, the mildew and antiseptic liquid immersion treatment includes the following steps: S21, add the mildew and corrosion prevention solution prepared by ACQ and water into the soaking tank, the ratio of ACQ to water is 1:12-15; S22, during the soaking process, the soaking liquid is continuously circulated by a water pump; S23. After the soaking is completed, the wood is drained, excess soaking liquid is removed, and then the drained wood is dried.

4. The method for impregnating and heat treating wood with a composite mildew and antiseptic liquid according to claim 1, characterized in that: In step S3, the high temperature heat treatment comprises the following steps: S31. Before heat treatment, trim the wood again to ensure that the wood surface is flat and free of defects; S32, heating stage, starting from room temperature and gradually heating up to the target treatment temperature in stages according to the type and thickness of the wood; S33. During the insulation stage, the temperature should be kept within the target treatment temperature range, i.e., 180°C to 250°C, and the temperature fluctuation should be controlled within a certain range to ensure the stability and consistency of the treatment effect; S34. During the cooling stage, the temperature should be gradually reduced from the target treatment temperature in the insulation stage to room temperature. The cooling rate should not be too fast to avoid cracks or deformation of the wood due to rapid cooling.

5. The method for impregnating and heat treating wood with a composite mildew and antiseptic liquid according to claim 1, characterized in that: In step S4, the post-processing includes the following steps: S41. Quality inspection: Conduct quality inspection on heat-treated wood; S42. Surface treatment: Carry out necessary surface treatment on the heat-treated wood as required.

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