A method for rapid ammonia fumigation of wooden floor surfaces

Abstract

The invention provides a method for rapid ammonia fumigation of wooden floor surfaces, belonging to the technical field of garbage bins. The method comprises the following steps: dividing wooden floor boards into three categories according to the color difference and white edge color of the wooden floor boards; slowly spraying a mixed liquid of hydrogen peroxide, tannic acid and ferrous sulfate as an active agent on the surface of the wooden floor boards; passing the wooden floor boards through a fumigation box via a conveyor belt with the surface facing upward; slowly spraying liquid ammonia on the surface of the wooden floor boards, and recovering ammonia in the fumigation box in real time via a VOC filter module to avoid environmental pollution; turning the boards at intervals via an external turning machine, placing the boards in a balancing room for 12 hours for balancing, and then fumigating the boards to a desired color tone. In this way, the temperature and spraying amount of the ammonia fumigation can be controlled, and the ammonia fumigation is in a closed water-free environment to avoid moisture absorption and expansion of the panels. The production mode of the assembly line is adopted, thereby increasing output and reducing costs.

Description

Technical Field

[0001] The invention relates to the technical field of ammonia fumigation of wooden floors, and in particular to a method for rapid ammonia fumigation of wooden floor surfaces. Background Art

[0002] Ammonia fumigation treatment of wood surface can produce special effects that cannot be achieved by paint coloring. It is one of the most popular methods for treating wood color differences, white edges, knots and other natural styles in solid wood and solid wood composite flooring. It can not only highlight the texture structure of wood, with unique ammonia fumigation color, strong layering and three-dimensional sense, but also enhance the artistic effect of wood and improve the utilization rate of board materials.

[0003] Traditional ammonia fumigation involves stacking solid wood and engineered wood flooring panels layer by layer on racks, leaving the panels exposed. These panels are then placed in a closed ammonia fumigation chamber, surrounded by concentrated ammonia solution. The volatilized ammonia vapors then smoke the wood for a long period of time. However, existing methods present several challenges. First, traditional ammonia fumigation requires extensive manual labor for stacking and racking, which consumes manpower and time, increasing time costs. Second, prolonged exposure causes the wood flooring's surface to absorb moisture and expand, leading to dimensional instability. Third, the humidity and temperature of the weather make it difficult to effectively control.

[0004] In summary, it is necessary to improve the existing rapid ammonia fumigation method for wooden floor surfaces. Summary of the Invention

[0005] In order to comprehensively solve the above problems, especially to address the shortcomings of the existing technology, the present invention provides a method for rapid ammonia fumigation of wooden floor surfaces that can comprehensively solve the above problems.

[0006] To achieve the above objectives, the present invention adopts the following technical means:

[0007] The present invention provides a method for rapid ammonia fumigation of wooden floor surfaces, which adopts a rapid ammonia fumigation device for wooden floor surfaces, the device comprises a fumigation box, a conveyor belt is installed at the bottom of the fumigation box, a wooden floor is placed on the upper part of the conveyor belt, a VOC filter module is installed on the upper part of the fumigation box, a plate turning machine is installed on the side of the fumigation box, and a balancing room is provided at the rear end of the conveyor belt. The ammonia fumigation method of the device is as follows: pretreatment: the wooden floor boards are divided into three categories according to the color difference and white edge color degree: small color difference, medium color difference and large color difference, and a mixture of hydrogen peroxide, tannic acid and ferrous sulfate active agent is slowly sprayed on the surface of the wooden floor boards; the fumigation box is controlled : Place the wooden flooring panels face up on a conveyor belt and pass them through a smoking box, and keep the temperature in the smoking box constant at 40°C with an error of ±2°C; Smoking: Slowly spray liquid ammonia on the surface of the wooden flooring panels, and keep the smoking box filled with ammonia. After all the spraying is completed, move out of the smoking box. During the smoking process, the VOC filter module will operate in real time to recover the ammonia in the smoking box to avoid environmental pollution; Static balance: The wooden flooring panels are flipped at intervals by an external flipping machine, and are stacked face to face. They are placed in a balance room with a temperature of 40°C and a relative humidity of 30% for 12 hours to balance and produce the desired panel color.

[0008] Furthermore, in the pretreatment step, hydrogen peroxide, tannic acid, and ferrous sulfate are mixed in a ratio of 100:10:1, and the pH value of the mixed solution is 7.6, which is weakly alkaline.

[0009] Furthermore, in the pretreatment step, the spraying amount of the hydrogen peroxide, tannic acid and ferrous sulfate mixture is 10 to 30 g / m2, and the different color difference wooden floors are adjusted according to the depth, with a large spraying amount for light colors and a small spraying amount for dark colors, that is, 30 g / m2 for small color difference, 20 g / m2 for medium color difference, and 10 g / m2 for large color difference.

[0010] Furthermore, a mounting bracket is installed on the outside of the conveyor belt, a conveying drive motor is provided on one side of the conveyor belt, and a support bracket is provided at the bottom of the mounting bracket.

[0011] Furthermore, a controller is provided on one side of the smoking box, electric doors are provided on both sides of the smoking box, and a door driving motor is installed on one side of the electric door.

[0012] Furthermore, a clamping slide rail is installed at the top of the smoking box, and clamping drive motors are symmetrically installed on both sides of the clamping slide rail. A clamping screw is provided at the output end of the clamping drive motor, and a telescopic clamping plate is sleeved on the clamping screw. A telescopic drive motor is provided on one side of the telescopic clamping plate.

[0013] Furthermore, a spraying slide rail is provided in the middle position inside the clamping slide rail, and two sets of spraying drive motors are installed in the middle position of the spraying slide rail.

[0014] Furthermore, the output end of the spray drive motor is provided with a spray screw, and the spray screw is sleeved with an L-shaped spray port.

[0015] Furthermore, an ammonia liquid delivery pipe is provided on one side of the fumigation box, one end of the ammonia liquid delivery pipe is connected to the liquid ammonia tank, and an infusion pump is provided inside the liquid ammonia tank.

[0016] Furthermore, an electric heater is provided on one side of the smoking box, and a temperature sensor is installed on the inner side wall of the smoking box.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The invention adopts an ammonia fumigation method of liquid ammonia + auxiliary active mixed liquid to overcome the shortcomings of traditional ammonia fumigation. Liquid ammonia is directly sprayed on the surface of the wooden floor under a controlled flow rate, and the surface of the wooden floor is pretreated according to the color difference conditions to better handle different color differences. The auxiliary active mixed liquid of hydrogen peroxide, tannic acid and ferrous sulfate is sprayed all over or partially. The pH value is adjusted to 7.6 to be weakly alkaline. The spraying amount of the mixed liquid is 10-30g / m2. The boards with different color differences are adjusted according to the depth. The spraying amount of light colors is large, and the spraying amount of dark colors is small. In this way, the controllable degree of ammonia fumigation temperature and spraying amount is achieved. In addition, the ammonia fumigation is in a closed water-free environment to avoid moisture absorption and expansion of the panel. The production mode of the assembly line is adopted, which increases output and reduces cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 is a top view of the present invention;

[0021] Figure 3 It is a partial structural schematic diagram of the present invention;

[0022] Figure 4 It is a schematic diagram of the internal structure of the smoking box of the present invention;

[0023] Figure 5 It is a front view of the internal structure of the smoking box of the present invention.

[0024] In the picture:

[0025] 1. Mounting frame; 2. Support frame; 3. Conveyor drive motor; 4. Conveyor belt; 5. Smoking box; 6. Controller; 7. Electric door; 8. Door drive motor; 9. Clamping slide rail; 10. Clamping drive motor; 11. Telescopic drive motor; 12. Spraying slide rail; 13. Spraying drive motor; 14. Liquid ammonia tank; 15. Ammonia liquid pipe; 16. VOC filter module; 17. Electric heater; 18. Turnover machine; 19. Balancing room; 20. Wooden floor; 21. Temperature sensor; 101. Clamping screw; 102. Telescopic clamping plate; 131. Spraying screw; 132. L-shaped spray port. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] Example 1:

[0028] As attached Figure 1 and attached Figure 3 To the attached Figure 5 As shown, in one embodiment of the present invention, a method for rapid ammonia fumigation of a wooden floor surface is provided, which adopts a rapid ammonia fumigation device for a wooden floor surface, the device comprising a fumigation box 5, a conveyor belt 4 is installed at the bottom of the fumigation box 5, a wooden floor 20 is placed on the upper part of the conveyor belt 4, a VOC filter module 16 is installed on the upper part of the fumigation box 5, a plate turning machine 18 is installed on the side of the fumigation box 5, and a balancing room 19 is provided at the rear end of the conveyor belt 4, which is characterized in that: the ammonia fumigation method of the device is as follows: pretreatment: the wooden floor 20 is divided into three categories according to the color difference and white edge color of the surface: small color difference, medium color difference and large color difference, and a mixture of hydrogen peroxide, tannic acid and ferrous sulfate active agent is slowly sprayed on the surface of the wooden floor 20; fumigation box control: the wooden floor 20 is faced upward through the conveyor belt 4 and passed through the fumigation box 5, and the temperature in the fumigation box 5 is kept constant at 40°C with an error of ±2°C; fumigation: liquid ammonia is slowly sprayed on the surface of the wooden floor 20 , keep the smoking box 5 full of ammonia, and move out of the smoking box 5 after all the spraying is completed. During the smoking process, the VOC filter module 16 operates in real time to recover the ammonia in the smoking box 5 to avoid environmental pollution; static balance: the external flipping machine 18 flips the panels at intervals, allowing the wooden floor 20 boards to be stacked face to face, and placed in a balance room 19 at a temperature of 40°C and a relative humidity of 30% for 12 hours to smoke the required board color; in the pretreatment step, hydrogen peroxide, tannic acid, and ferrous sulfate are mixed in a ratio of 100:10:1, and the pH value of the mixed solution is 7.6, which is weakly alkaline; in the pretreatment step, the spraying amount of the hydrogen peroxide, tannic acid, and ferrous sulfate mixed solution is 10 to 30 g / m2, and the different color difference wooden floors 20 are adjusted according to the depth, with a large spray amount for light colors and a small spray amount for dark colors, i.e., 30 g / m2 for small color difference, 20 g / m2 for medium color difference, and 10 g / m2 for large color difference.

[0029] In this example, the pretreated wooden floor 20 is conveyed into the smoking box 5 with the surface facing upward. The smoking box 5 has an adjustable L-shaped spray port 132, which slowly sprays liquid ammonia onto the surface of the pretreated wooden floor 20. The box must be kept filled with ammonia gas.

[0030] Furthermore, 20 pairs of 2mm thick oak-faced large color-difference wooden floors with a specification of 910×120×15mm were sprayed with a surfactant mixture on the surface for pretreatment. The surfactant ratio was: hydrogen peroxide, tannic acid, and ferrous sulfate. The pH value was adjusted to 7.6 in a ratio of 100:10:1, which was weakly alkaline. The spraying amount was 10g / ㎡. If the different color-difference boards were adjusted according to the depth, the light-colored spraying amount was large and the dark-colored spraying amount was small.

[0031] Example 2:

[0032] As attached Figure 2 To the attached Figure 4 As shown, in one embodiment of the present invention, specifically, a mounting frame 1 is installed on the outside of the conveyor belt 4, a conveying drive motor 3 is provided on one side of the conveyor belt 4, and a support frame 2 is provided at the bottom of the mounting frame 1; a controller 6 is provided on one side of the smoking box 5, electric doors 7 are provided on both sides of the smoking box 5, and a door drive motor 8 is installed on one side of the electric door 7; a clamping slide rail 9 is installed on the top of the inside of the smoking box 5, and clamping drive motors 10 are symmetrically installed on both sides of the clamping slide rail 9, and a clamping screw rod 101 is provided at the output end of the clamping drive motor 10, and a telescopic clamping plate 102 is sleeved on the clamping screw rod 101. A telescopic drive motor 11 is provided on one side of the telescopic clamping plate 102; a spraying slide rail 12 is provided at the middle position inside the clamping slide rail 9, and two sets of spraying drive motors 13 are installed at the middle position of the spraying slide rail 12; a spraying screw 131 is provided at the output end of the spraying drive motor 13, and an L-shaped spraying port 132 is sleeved on the spraying screw 131; an ammonia liquid delivery pipe 15 is provided on one side of the fumigation box 5, and one end of the ammonia liquid delivery pipe 15 is connected to the liquid ammonia tank 14, and an infusion pump is provided inside the liquid ammonia tank 14; an electric heater 17 is provided on one side of the fumigation box 5, and a temperature sensor 21 is installed on the inner side wall of the fumigation box 5.

[0033] In this embodiment, during use, the conveying drive motor 3 drives the conveyor belt 4 to move at a constant speed, and the speed is maintained at 20 meters per minute. After the wooden floor 20 enters the smoking box 5, the electric doors 7 on both sides are closed to make the smoking box 5 in a closed state. Then, the wooden floor 20 is clamped and lifted by the clamping rails 9 and the telescopic clamping plates 102. Then, anhydrous liquid ammonia is sprayed onto the wooden floor 2 through the L-shaped spraying port 132 in the spraying rail 12. During the operation, the VOC filter module 16 operates in real time to recover ammonia.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0035] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for rapid ammonia fumigation of a wooden floor surface, using a rapid ammonia fumigation device for a wooden floor surface, the device comprising a fumigation box (5), a conveyor belt (4) installed at the bottom of the fumigation box (5), a wooden floor (20) placed on the upper portion of the conveyor belt (4), a VOC filter module (16) installed on the upper portion of the fumigation box (5), a plate turning machine (18) installed on the side of the fumigation box (5), and a balancing room (19) provided at the rear end of the conveyor belt (4), characterized in that: Ammonia fumigation method of the device: S1. Pretreatment: The wooden floor (20) is divided into three categories according to the color difference and white edge color of the wooden floor (20): small color difference, medium color difference, and large color difference. A mixture of hydrogen peroxide, tannic acid, and ferrous sulfate activator is slowly sprayed on the surface of the wooden floor (20); S2, smoke box control: the wooden floor (20) is placed with the board surface facing upwards through the conveyor belt (4), and passed through the smoke box (5), and the temperature in the smoke box (5) is kept constant at 40°C with an error of ±2°C; S3, fumigation: liquid ammonia is slowly sprayed on the surface of the wooden floor (20), and the fumigation box (5) is kept filled with ammonia gas. After all the spraying is completed, the fumigation box (5) is removed. During the fumigation process, the VOC filter module (16) operates in real time to recover the ammonia gas in the fumigation box (5) to avoid environmental pollution; S4, static balance: The external turning machine (18) turns the boards at intervals, allowing the wooden floor (20) to be stacked face to face, and placed in a balance room (19) at a temperature of 40°C and a relative humidity of 30% for 12 hours to smoke the desired board color; In step S1, hydrogen peroxide, tannic acid, and ferrous sulfate are mixed in a ratio of 100:10:1, and the pH value of the mixed solution is 7.6, which is weakly alkaline; In step S1, the spraying amount of the mixed solution of hydrogen peroxide, tannic acid and ferrous sulfate is 10 to 30 g / m2, and the wooden flooring (20) with different color differences is adjusted according to the depth, with a large spraying amount for light colors and a small spraying amount for dark colors, i.e., 30 g / m2 for small color differences, 20 g / m2 for medium color differences, and 10 g / m2 for large color differences; A mounting frame (1) is installed on the outside of the conveyor belt (4), a conveying drive motor (3) is provided on one side of the conveyor belt (4), and a support frame (2) is provided at the bottom of the mounting frame (1); A controller (6) is provided on one side of the smoking box (5), electric doors (7) are provided on both sides of the smoking box (5), and a door driving motor (8) is installed on one side of the electric door (7); A clamping slide rail (9) is installed at the top end of the smoking box (5), and clamping drive motors (10) are symmetrically installed on both sides of the clamping slide rail (9). The output end of the clamping drive motor (10) is provided with a clamping screw rod (101), and a telescopic clamping plate (102) is sleeved on the clamping screw rod (101), and a telescopic drive motor (11) is provided on one side of the telescopic clamping plate (102); A spraying slide rail (12) is provided at a middle position inside the clamping slide rail (9), and two sets of spraying drive motors (13) are installed at the middle position of the spraying slide rail (12); The output end of the spraying drive motor (13) is provided with a spraying screw (131), and an L-shaped spraying port (132) is sleeved on the spraying screw (131); The pretreated wooden floor (20) is transported into the smoking box (5) with the surface of the board facing upwards. The smoking box (5) has an adjustable L-shaped spray port (132). Liquid ammonia is slowly sprayed on the surface of the pretreated wooden floor (20). The box must always be filled with ammonia. A 2mm thick oak wood floor (20) with a large color difference and a size of 910×120×15mm is taken and the surface is sprayed with an active agent mixture to pretreat it. The active agent ratio is: hydrogen peroxide, tannic acid, and ferrous sulfate. The pH value is adjusted to 7.6 in a ratio of 100:10:1 to be weakly alkaline. The spraying amount is 10g / ㎡. If the different color difference boards are adjusted according to the depth, the light color spraying amount is large and the dark color spraying amount is small. During use, the conveying drive motor (3) drives the conveyor belt (4) to move at a constant speed, and the speed is maintained at 20 meters per minute. After the wooden floor (20) enters the smoking box (5), the electric doors 7 on both sides are closed to put the smoking box (5) in a closed state. Then, the wooden floor (20) is clamped and lifted by the clamping slide rail (9) and the telescopic clamping plate (102). Then, anhydrous liquid ammonia is sprayed onto the wooden floor (20) through the L-shaped spraying port 132 in the spraying slide rail 12. During the operation, the VOC filter module (16) operates in real time to recover ammonia.

2. The method for rapid ammonia fumigation of wooden floor surfaces according to claim 1, characterized in that: An ammonia liquid delivery pipe (15) is provided on one side of the fumigation box (5), one end of which is connected to a liquid ammonia tank (14), and an infusion pump is provided inside the liquid ammonia tank (14); an electric heater (17) is provided on one side of the fumigation box (5), and a temperature sensor (21) is installed on the inner side wall of the fumigation box (5).

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