Intermittent bamboo wood drying device and method

Abstract

The intermittent bamboo drying device comprises a feeding mechanism, a kiln body, a discharging mechanism and a bamboo powder collecting and conveying mechanism, a plurality of bamboo conveying mechanisms which are arranged side by side up and down to form multiple layers are arranged in the kiln body, and the feeding end of the lower-layer bamboo conveying mechanism is correspondingly arranged below the discharging end of the upper-layer bamboo conveying mechanism. The feeding mechanism is in butt joint with the feeding end of the uppermost bamboo wood conveying mechanism, the discharging mechanism is in butt joint with the discharging end of the lowermost bamboo wood conveying mechanism, and the bamboo powder collecting and conveying mechanism is arranged below the lowermost bamboo wood conveying mechanism. The method comprises the steps of kiln body preheating, device starting, bamboo wood feeding, drying treatment, bamboo wood discharging, balance treatment and falling material cleaning. According to the device and method, efficient drying of the bamboo wood can be achieved, the drying uniformity of the bamboo wood inside and outside the wood pile can be guaranteed, the temperature and humidity of a medium in the drying kiln can be adjusted and controlled, and the drying energy consumption can be reduced to the maximum extent while the drying quality is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of bamboo drying, and relates to an intermittent bamboo drying device and method, in particular to a primary drying and secondary drying device and a drying method for bamboo bundles in recombinant bamboo manufacturing. Background Art

[0002] Recombined bamboo is a new type of bamboo composite material that is processed into strips of bamboo, bamboo filaments or rolled into bamboo bundles, dried and impregnated once, dried to the required moisture content twice, and then cured at high temperature and high pressure. It has the advantages of high strength, good weather resistance and corrosion resistance, and beautiful texture. It has completely changed people's traditional perception of bamboo products. It is a pioneering new bamboo product. It has become one of the mainstream products of my country's bamboo industry and is widely used in architectural decoration, furniture manufacturing, gardening and other fields. Drying is an important production process in the manufacturing process of recombined bamboo. Its energy consumption accounts for about 40%-70% of the total processing energy consumption, and the drying time exceeds 50% of the time used in all processes of recombinant bamboo production. Correct and reasonable drying of bamboo (bamboo bundles) is not only the key to ensuring the quality of recombinant bamboo products, but also an important technical means to improve production efficiency, reduce energy consumption, and achieve low-carbon green manufacturing. At present, in production, the more common methods of primary drying (drying of bamboo bundles before dipping) and secondary drying (drying of bamboo bundles after dipping) of bamboo bundles are tunnel kiln drying, conventional periodic vertical kiln drying, traditional continuous mesh belt drying, etc. Among them, tunnel kiln drying has the advantages of small one-time investment and low technical requirements, but has disadvantages such as high energy consumption and uneven drying of bamboo bundles; conventional vertical kiln drying has the advantages of large loading capacity, low energy consumption, and good overall uniformity of drying, but it has problems such as long drying time, large difference in moisture content of bamboo bundles inside and outside the pile, and adhesive pre-curing phenomenon in the dipping bamboo bundles; continuous mesh belt drying kiln has the advantages of short drying time and continuous drying process, but it has problems such as high energy (electricity and heat) consumption and difficulty in achieving precise control of drying medium conditions. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an intermittent bamboo material drying device and method with short drying time, low energy consumption and good drying uniformity.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions.

[0005] An intermittent bamboo material drying device comprises a feeding mechanism, a kiln body, a discharging mechanism and a bamboo powder collecting and conveying mechanism. The kiln body is provided with a plurality of bamboo material conveying mechanisms arranged side by side up and down to form multiple layers. Among the bamboo material conveying mechanisms in adjacent layers, the feeding end of the bamboo material conveying mechanism in the lower layer is correspondingly arranged below the discharging end of the bamboo material conveying mechanism in the upper layer, so as to receive the bamboo material dropped from the discharging end of the bamboo material conveying mechanism in the upper layer. The feeding mechanism is connected to the feeding end of the bamboo material conveying mechanism in the uppermost layer, and the discharging mechanism is connected to the discharging end of the bamboo material conveying mechanism in the lowermost layer. The bamboo powder collecting and conveying mechanism is arranged below the bamboo material conveying mechanism in the lowermost layer, so as to collect the dropped bamboo material from the multiple layers of bamboo material conveying mechanisms above.

[0006] In the above-mentioned intermittent bamboo drying device, preferably, the kiln body is provided with a first chamber and a second chamber, the first chamber and the second chamber are connected through a first connecting port and a second connecting port, each of the bamboo conveying mechanisms is arranged in the first chamber, a heating mechanism is provided in the first chamber and / or the second chamber, a fan is provided in the second chamber or at the first connecting port, and an air inlet and an air exhaust port are provided on the kiln body, the air inlet is connected to the second chamber, and the air exhaust port is connected to the first chamber or the second chamber.

[0007] In the above-mentioned intermittent bamboo drying device, preferably, the second chamber is located above the first chamber, and the second chamber is provided with a partition between the first connecting port and the second connecting port, the partition is provided with a connecting hole, the fan is arranged at the connecting hole, the air inlet and the air outlet are respectively connected to the space on both sides of the partition, and the heating mechanism is respectively arranged on both sides of the partition in the second chamber.

[0008] In the above-mentioned intermittent bamboo drying device, preferably, the second chamber is arranged at the lower part of one side of the first chamber, the heating mechanism is respectively arranged in the first chamber and at the second connecting port, the fan is arranged at the first connecting port, the air inlet is connected to the second chamber, and the air outlet is connected to the first chamber.

[0009] In the above-mentioned intermittent bamboo drying device, preferably, the second chamber is arranged on one side of the first chamber, a partition is provided between the second chamber and the first connecting port and the second connecting port, a connecting hole is provided on the partition, the fan is arranged at the connecting hole, the air inlet and the air outlet are respectively connected to the space on both sides of the partition, and the heating mechanism is arranged on one side of the partition in the second chamber.

[0010] The intermittent bamboo drying device mentioned above preferably further comprises a control module for regulating the temperature and humidity in the kiln body, and the loading mechanism, the discharging mechanism and the multi-layer bamboo conveying mechanism are all connected to the control module.

[0011] In the above-mentioned intermittent bamboo drying device, preferably, a material guiding mechanism is provided between the feeding end and the discharging end of the bamboo material conveying mechanism of adjacent layers; a feeding port is provided at the top of one side of the kiln body and a discharging port is provided at the bottom of the other side, or a feeding port is provided at the top of one side of the kiln body and a discharging port is provided at the bottom; the loading mechanism is connected to the bamboo material conveying mechanism of the uppermost layer through the feeding port, and the discharging mechanism is connected to the bamboo material conveying mechanism of the lowermost layer through the discharging port.

[0012] In the above-mentioned intermittent bamboo drying device, preferably, the bamboo conveying mechanism includes a plurality of rows of chain conveying assemblies arranged horizontally at intervals; and the feeding mechanism includes a chain transmission assembly.

[0013] As a general technical concept, the present invention also provides an intermittent bamboo drying method, which is implemented using the above-mentioned intermittent bamboo drying device and includes the following steps:

[0014] The air inlet and the air outlet provided in the kiln body are closed, the fan and the heating mechanism provided in the kiln body are turned on, the temperature in the kiln body is increased to the set temperature, the feeding mechanism and the multi-layer bamboo conveying mechanism are turned on, the feeding mechanism conveys the bamboo to the feeding end of the bamboo conveying mechanism of the uppermost layer, when the bamboo moves to the other end of the bamboo conveying mechanism of this layer, the bamboo conveying mechanism pauses, and after an intermittent set time, continues to move, the bamboo flips downward and falls onto the bamboo conveying mechanism of the next layer moving in the opposite direction at the same speed, when the bamboo moves to the other end of the bamboo conveying mechanism of this layer, the bamboo conveying mechanism pauses again, and after an intermittent set time, continues to move, the bamboo falls downward onto the bamboo conveying mechanism of the next layer moving in the opposite direction at the same speed, after so many round trips, the dry bamboo falls onto the bamboo conveying mechanism of the lowermost layer, and is conveyed to the outside of the kiln body through the discharging mechanism.

[0015] In the above-mentioned intermittent bamboo drying method, preferably, when the primary drying method is adopted (mainly for unimpregnated bamboo), the temperature in the kiln body is increased to 70°C to 95°C, and when the secondary drying method is adopted (mainly for impregnated bamboo), the temperature in the kiln body is increased to 50°C to 70°C; during the drying process, the temperature in the kiln body is kept constant and the relative humidity is controlled between 45% and 65%.

[0016] In the above-mentioned intermittent bamboo drying method, preferably, when conveying bamboo, the chain transmission assembly provided by the feeding mechanism and the chain conveying assembly provided by the bamboo conveying mechanism keep the running line speed consistent, the running line speed is controlled at 1m / min to 5m / min, the intermittent setting time is controlled at 10min to 30min, and the number of layers of the bamboo conveying mechanism is controlled at 3 to 12 layers.

[0017] In the above-mentioned intermittent bamboo drying method, preferably, the dried bamboo sent out of the kiln body is bundled to obtain bamboo bundles, the weight of each bamboo bundle is controlled to be 3kg-15kg, and multiple bamboo bundles are arranged into multiple layers of bamboo bundles arranged up and down, and two adjacent bamboo bundle layers are separated by partitions, the thickness of the partitions is 3cm-8cm, and an air flow channel of 5cm-10cm is reserved between the bamboo bundles in the same layer; and a balancing treatment is performed, the balancing temperature is controlled between 25°C and 30°C, and the relative humidity is controlled between 60% and 80%.

[0018] In the above-mentioned intermittent bamboo drying method, preferably, when the bamboo moves in the kiln body or flips over and falls from the upper bamboo conveying mechanism to the lower bamboo conveying mechanism, the bamboo powder or bamboo chips on the bamboo fall onto the bamboo powder collecting and conveying mechanism, and are finally conveyed to the outside of the kiln body, and the conveying speed of the bamboo powder collecting and conveying mechanism is controlled within 20m / min.

[0019] In the above-mentioned intermittent bamboo material drying method, preferably, the bamboo material comprises one or both of bamboo bundles and bamboo strips.

[0020] In the above intermittent bamboo drying method, preferably, the temperature and humidity in the kiln body are controlled by the control module.

[0021] In the present invention, the distance of each intermittent movement of the bamboo conveying mechanism is the length of one layer of the bamboo conveying mechanism, and the running speed and time interval are determined comprehensively based on factors such as the paving thickness of the bamboo (such as bamboo bundles), the initial and final moisture contents of the bamboo, the medium temperature, the length of each layer of the transmission chain, the number of chain layers, and the like.

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] The present invention provides an intermittent bamboo drying device and method. The drying device includes a feeding mechanism, a kiln body, a discharging mechanism, a bamboo powder collecting and conveying mechanism, and a control module. The kiln body is provided with a plurality of bamboo conveying mechanisms arranged side by side up and down. The bamboo can be turned down by the upper bamboo conveying mechanism and fall onto the next bamboo conveying mechanism. The device and method of the present invention can not only realize the efficient drying of bamboo, reduce the trouble caused by the existing forklift loading and unloading kiln, and completely save the cost of making material iron racks, but also realize multiple turning of bamboo during the drying process, ensure the uniformity of drying of bamboo bundles inside and outside the material pile, and can arbitrarily adjust and control the temperature and humidity of the medium in the drying kiln, while ensuring the drying quality, and can reduce the drying energy consumption to the greatest extent. Compared with conventional periodic vertical kiln drying, the drying time is shortened by more than 60%, greatly reducing or even avoiding the pre-curing of phenolic resin adhesive, and providing the prerequisite for the subsequent preparation of high-quality recombinant bamboo; compared with traditional continuous mesh belt drying, the drying and transmission energy consumption is reduced by more than 10%. The device of the present invention has a compact and simple structure, strong versatility, and relatively low cost, and is suitable for large-scale promotion and use in reconstituted bamboo manufacturing enterprises.

[0024] The intermittent bamboo drying device and method of the present invention can realize single drying and double drying of bamboo (bamboo bundles), which is of great significance for improving the quality of reconstituted bamboo products, increasing production efficiency and reducing energy consumption, and can provide important technical support for the field of bamboo processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the main structure of the intermittent bamboo drying device of embodiments 1-3 of the present invention.

[0026] Figure 2 Schematic diagram of the kiln structure of the intermittent bamboo material drying device of Embodiments 1-3 of the present invention.

[0027] Figure 3 It is a schematic structural diagram of the feeding mechanism of the intermittent bamboo material drying device of embodiments 1-3 of the present invention.

[0028] Figure 4 It is a schematic diagram of the main cross-sectional structure of the kiln body in Example 1 of the present invention.

[0029] Figure 5 It is a schematic diagram of the side sectional structure of the kiln body in Example 1 of the present invention.

[0030] Figure 6 It is a schematic diagram of the side sectional structure of the kiln body in Example 2 of the present invention.

[0031] Figure 7 It is a schematic diagram of the main cross-sectional structure of the kiln body in Example 2 of the present invention.

[0032] Figure 8It is a schematic diagram of the main cross-sectional structure of the kiln body in Example 3 of the present invention.

[0033] Fig. 9 It is a schematic diagram of the top cross-sectional structure of the kiln body in Example 3 of the present invention.

[0034] The symbols in the figure represent:

[0035] 1. Feeding mechanism; 11. Feeding frame; 12. Feeding transmission chain; 13. Feeding transmission gear; 14. Feeding drive motor; 2. Kiln body; 201. Feeding port; 202. Discharging port; 21. First chamber; 22. Second chamber; 23. First connecting port; 24. Second connecting port; 25. Air inlet; 26. Air outlet; 27. Partition; 271. Connecting hole; 3. Discharging mechanism; 4. Bamboo powder collecting and conveying mechanism; 5. Control module; 6. Bamboo material conveying mechanism; 7. Heating mechanism; 8. Fan; 9. Material guiding mechanism. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby. The materials and instruments used in the following embodiments are all commercially available.

[0037] Example 1

[0038] An intermittent bamboo material drying device of the present invention, such as Figures 1 to 3 As shown, it includes a feeding mechanism 1, a kiln body 2, a discharging mechanism 3 and a bamboo powder collecting and conveying mechanism 4. A plurality of bamboo material conveying mechanisms 6 are arranged side by side up and down to form multiple layers in the kiln body 2. In the bamboo material conveying mechanisms 6 of adjacent layers, the feeding end of the lower bamboo material conveying mechanism 6 is correspondingly arranged below the discharging end of the upper bamboo material conveying mechanism 6 to receive the bamboo material dropped from the discharging end of the upper bamboo material conveying mechanism 6. The feeding mechanism 1 is connected to the feeding end of the uppermost bamboo material conveying mechanism 6, and the discharging mechanism 3 is connected to the discharging end of the lowermost bamboo material conveying mechanism 6. The bamboo powder collecting and conveying mechanism 4 is arranged below the lowermost bamboo material conveying mechanism 6 to collect the dropped materials on the upper multiple layers of bamboo material conveying mechanisms 6.

[0039] The device of the present invention can not only realize the efficient drying of bamboo materials, reduce the trouble caused by the existing forklift loading and unloading kiln, completely save the cost of making material iron racks, but also realize multiple turning of bamboo materials during the drying process, ensure the uniformity of drying of bamboo bundles inside and outside the material pile, and arbitrarily adjust and control the temperature and humidity of the medium in the drying kiln, while ensuring the drying quality, it can also reduce the drying energy consumption to the greatest extent.

[0040] In this embodiment, Figure 4 and Figure 5As shown, a first chamber 21 and a second chamber 22 are provided in the kiln body 2, and the first chamber 21 and the second chamber 22 are connected via a first connecting port 23 and a second connecting port 24. The multi-layer bamboo material conveying mechanism 6 is arranged in the first chamber 21, a heating mechanism 7 is provided in the second chamber 22, a fan 8 is provided in the second chamber 22, and an air inlet 25 and an air outlet 26 are provided on the kiln body 2. The air inlet 25 is connected to the second chamber 22, and the air outlet 26 is connected to the second chamber 22.

[0041] In this embodiment, the second chamber 22 is located above the first chamber 21. The second chamber 22 is provided with a partition 27 between the first connecting port 23 and the second connecting port 24. The partition 27 is provided with a connecting hole 271. The fan 8 is arranged at the connecting hole 271. The air inlet 25 and the air outlet 26 are respectively connected to the space on both sides of the partition 27. The heating mechanism 7 is respectively arranged on both sides of the partition 27 in the second chamber 22.

[0042] The kiln body 2 of this embodiment is a top fan drying kiln body, the fan 8 is an axial flow fan, the fan model is No. 6 or No. 8, and the center distance between each fan 8 is controlled to be 1m-3m. The partition 27 is an aluminum partition, which can completely separate the positive pressure chamber and the negative pressure chamber of the fan 8 during operation. The air inlet 25 and the air outlet 26 can be set to an automatic opening and closing form. The air inlet 25 and the air outlet 26 are square in shape, and the side length is between 20cm-40cm. The length L of the kiln body 2 is between 6m-50m.

[0043] In this embodiment, a material guiding mechanism 9 is provided between the feeding end and the discharging end of the bamboo material conveying mechanism 6 of adjacent layers.

[0044] In this embodiment, a feed port 201 is provided at the top of one side of the kiln body 2, and a discharge port 202 is provided at the bottom of the other side. The feeding mechanism 1 is connected to the uppermost bamboo material conveying mechanism 6 through the feed port 201, and the discharge mechanism 3 is connected to the lowermost bamboo material conveying mechanism 6 through the discharge port 202. The discharge mechanism 3 can be an extension section of the lowermost bamboo material conveying mechanism 6.

[0045] In this embodiment, the bamboo material conveying mechanism 6 includes multiple rows of chain conveying assemblies arranged horizontally at intervals; the feeding mechanism 1 includes a feeding frame 11, a chain transmission assembly arranged on the feeding frame 11 and a feeding drive motor 14, and the chain transmission assembly includes a feeding transmission chain 12 and a feeding transmission gear 13 arranged at intervals on the feeding transmission chain 12.

[0046] In this embodiment, the intermittent bamboo material drying device further includes a control module 5 for regulating the temperature and humidity in the kiln body 2, and the loading mechanism 1, the discharging mechanism 3 and the multi-layer bamboo material conveying mechanism 6 are all connected to the control module 5. When the relative humidity in the kiln body 2 is higher than the set value, the control module 5 sends a control signal to open the air inlet 25 and the air outlet 26 to discharge the humid air; when the relative humidity in the kiln body 2 is lower than the set value, the control module 5 sends a control signal to close the air inlet 25 and the air outlet 26. When the temperature in the kiln body 2 is higher than the set value, the control module 5 sends a control signal to close the heating mechanism 7 and stop heating; when the temperature in the kiln body 2 is lower than the set value, the control module 5 sends a control signal to open the heating mechanism 7 to increase the temperature of the drying medium in the kiln body.

[0047] Figure 4 and Figure 5 In the embodiment, the first chamber 21 is used to install the bamboo material conveying mechanism 6, and the second chamber 22 is mainly used to install the heating mechanism 7 and the fan 8. The partition plate 27 is arranged between the first connecting port 23 and the second connecting port 24 in the second chamber 22 to completely separate the positive pressure area and the negative pressure area on both sides of the fan 8, to prevent the drying medium from directly passing through the gap between the fans 8 and directly returning from the positive pressure area of ​​the fan to the negative pressure area, and to ensure that the drying medium enters the first chamber 21 from the second chamber 22 through the connecting port 23 or the connecting port 24, and flows through the bamboo material to be dried placed on the bamboo material conveying mechanism 6.

[0048] Example 2

[0049] An intermittent bamboo drying device of the present invention, such as Figures 1 to 3 As shown, it includes a feeding mechanism 1, a kiln body 2, a discharging mechanism 3 and a bamboo powder collecting and conveying mechanism 4. A plurality of bamboo material conveying mechanisms 6 are arranged side by side up and down to form multiple layers in the kiln body 2. In the bamboo material conveying mechanisms 6 of adjacent layers, the feeding end of the lower bamboo material conveying mechanism 6 is correspondingly arranged below the discharging end of the upper bamboo material conveying mechanism 6 to receive the bamboo material dropped from the discharging end of the upper bamboo material conveying mechanism 6. The feeding mechanism 1 is connected to the feeding end of the uppermost bamboo material conveying mechanism 6, and the discharging mechanism 3 is connected to the discharging end of the lowermost bamboo material conveying mechanism 6. The bamboo powder collecting and conveying mechanism 4 is arranged below the lowermost bamboo material conveying mechanism 6 to collect the dropped materials on the upper multiple layers of bamboo material conveying mechanisms 6.

[0050] The device of the present invention can not only realize the efficient drying of bamboo materials, reduce the trouble caused by the existing forklift loading and unloading kiln, completely save the cost of making material iron racks, but also realize multiple turning of bamboo materials during the drying process, ensure the uniformity of drying of bamboo bundles inside and outside the material pile, and arbitrarily adjust and control the temperature and humidity of the medium in the drying kiln, while ensuring the drying quality, it can also reduce the drying energy consumption to the greatest extent.

[0051] In this embodiment, Figure 6 and Figure 7 As shown, a first chamber 21 and a second chamber 22 are provided in the kiln body 2, and the first chamber 21 and the second chamber 22 are connected via a first connecting port 23 and a second connecting port 24. The multi-layer bamboo material conveying mechanism 6 is arranged in the first chamber 21, a heating mechanism 7 is provided in the first chamber 21, a fan 8 is provided at the first connecting port 23, and an air inlet 25 and an air outlet 26 are provided on the kiln body 2. The air inlet 25 is connected to the second chamber 22, and the air outlet 26 is connected to the first chamber 21.

[0052] In this embodiment, the second chamber 22 is disposed at a lower portion of one side of the first chamber 21 , the heating mechanism 7 is disposed in the first chamber 21 and at the second connecting port 24 , and the fan 8 is disposed at the first connecting port 23 .

[0053] The kiln body 2 of this embodiment is a side blower drying kiln, the fan 8 is an axial flow fan, the fan model is No. 6 or No. 8, and the center distance between each fan 8 is controlled to be 1m-3m. The first chamber 21 and the second chamber 22 are formed by arranging a partition 27 in the kiln body 2. The partition 27 is an aluminum partition, which can completely separate the positive pressure chamber and the negative pressure chamber of the fan 8 during operation. The distance h between the aluminum partition and the side wall of the kiln body 2 is 30cm-50cm. The air inlet 25 and the exhaust port 26 can be set to an automatic opening and closing form. The air inlet 25 and the exhaust port 26 are square in shape, and the side length is between 20cm-40cm. The length L of the kiln body 2 is between 6m-50m.

[0054] In this embodiment, a material guiding mechanism 9 is provided between the feeding end and the discharging end of the bamboo material conveying mechanism 6 of adjacent layers.

[0055] In this embodiment, a feed port 201 is provided at the top of one side of the kiln body 2, and a discharge port 202 is provided at the bottom of the other side. The feeding mechanism 1 is connected to the uppermost bamboo material conveying mechanism 6 through the feed port 201, and the discharge mechanism 3 is connected to the lowermost bamboo material conveying mechanism 6 through the discharge port 202. The discharge mechanism 3 can be an extension section of the lowermost bamboo material conveying mechanism 6.

[0056] In this embodiment, the bamboo material conveying mechanism 6 includes a plurality of rows of chain conveying components arranged horizontally at intervals; the feeding mechanism 1 includes a chain transmission component.

[0057] In this embodiment, the intermittent bamboo drying device also includes a control module 5 for regulating the temperature and humidity in the kiln body 2. The loading mechanism 1, the discharging mechanism 3 and the multi-layer bamboo conveying mechanism 6 are all connected to the control module 5. The control process can refer to Example 1.

[0058] and Figure 4 and Figure 5In comparison, the second chamber 22 is arranged at the bottom of one side of the kiln body to reduce the construction cost of the drying kiln body; in Example 1, the first chamber 21 and the second chamber 22 are arranged up and down, and in Example 2, they are arranged left and right. In Example 2, the heating mechanism 7 is arranged on the left and right sides to ensure the uniformity of heating of the drying medium.

[0059] Example 3

[0060] An intermittent bamboo material drying device of the present invention, such as Figures 1 to 3 As shown, it includes a feeding mechanism 1, a kiln body 2, a discharging mechanism 3 and a bamboo powder collecting and conveying mechanism 4. A plurality of bamboo material conveying mechanisms 6 are arranged side by side up and down to form multiple layers in the kiln body 2. In the bamboo material conveying mechanisms 6 of adjacent layers, the feeding end of the lower bamboo material conveying mechanism 6 is correspondingly arranged below the discharging end of the upper bamboo material conveying mechanism 6 to receive the bamboo material dropped from the discharging end of the upper bamboo material conveying mechanism 6. The feeding mechanism 1 is connected to the feeding end of the uppermost bamboo material conveying mechanism 6, and the discharging mechanism 3 is connected to the discharging end of the lowermost bamboo material conveying mechanism 6. The bamboo powder collecting and conveying mechanism 4 is arranged below the lowermost bamboo material conveying mechanism 6 to collect the dropped materials on the upper multiple layers of bamboo material conveying mechanisms 6.

[0061] The device of the present invention can not only realize the efficient drying of bamboo materials, reduce the trouble caused by the existing forklift loading and unloading kiln, completely save the cost of making material iron racks, but also realize multiple turning of bamboo materials during the drying process, ensure the uniformity of drying of bamboo bundles inside and outside the material pile, and arbitrarily adjust and control the temperature and humidity of the medium in the drying kiln, while ensuring the drying quality, it can also reduce the drying energy consumption to the greatest extent.

[0062] In this embodiment, Figure 8 and Fig. 9 As shown, a first chamber 21 and a second chamber 22 are provided in the kiln body 2, and the first chamber 21 and the second chamber 22 are connected via a first connecting port 23 and a second connecting port 24. A multi-layer bamboo material conveying mechanism 6 is provided in the first chamber 21, a heating mechanism 7 is provided in the second chamber 22, a fan 8 is provided in the second chamber 22, and an air inlet 25 and an air outlet 26 are provided on the kiln body 2, the air inlet 25 is connected to the second chamber 22, and the air outlet 26 is connected to the second chamber 22.

[0063] In this embodiment, the second chamber 22 is arranged on one side of the first chamber 21, and a partition 27 is provided in the second chamber 22 between the first connecting port 23 and the second connecting port 24. A connecting hole 271 is provided on the partition 27, and the fan 8 is arranged at the connecting hole 271. The air inlet 25 and the air outlet 26 are respectively connected to the space on both sides of the partition 27. The heating mechanism 7 is arranged on one side of the partition 27 in the second chamber 22, and the other side is convenient for personnel to enter and facilitate maintenance.

[0064] The kiln body 2 of this embodiment is an end fan drying kiln body, the fan 8 is an axial flow fan, and the fan model is No. 8 or No. 10. The partition 27 is an aluminum partition, which can completely separate the positive pressure chamber and the negative pressure chamber of the fan 8 during operation. The air inlet 25 and the air outlet 26 can be set to an automatic opening and closing form. The air inlet 25 and the air outlet 26 are square in shape, and the side length is between 20cm-40cm. The length L of the kiln body 2 is between 6m-10m.

[0065] In this embodiment, a material guiding mechanism 9 is provided between the feeding end and the discharging end of the bamboo material conveying mechanism 6 of adjacent layers.

[0066] In this embodiment, a feed port 201 is provided at the top of one side of the kiln body 2, and a discharge port 202 is provided at the bottom. The feeding mechanism 1 is connected to the uppermost bamboo material conveying mechanism 6 through the feed port 201, and the discharge mechanism 3 is connected to the lowermost bamboo material conveying mechanism 6 through the discharge port 202. The discharge mechanism 3 can be an extension of the lowermost bamboo material conveying mechanism 6.

[0067] In this embodiment, the bamboo material conveying mechanism 6 includes a plurality of rows of chain conveying components arranged horizontally at intervals; the feeding mechanism 1 includes a chain transmission component.

[0068] In this embodiment, the intermittent bamboo drying device also includes a control module 5 for regulating the temperature and humidity in the kiln body 2. The loading mechanism 1, the discharging mechanism 3 and the multi-layer bamboo conveying mechanism 6 are all connected to the control module 5. The control process can refer to Example 1.

[0069] In the above embodiments 1-3, the application examples (working principles) of each intermittent bamboo drying device are as follows:

[0070] An intermittent bamboo drying method of the present invention is implemented using the intermittent bamboo drying device of embodiments 1-3, comprising the following steps:

[0071] S1. Kiln preheating: close the air inlet 25 and the air outlet 26 of the kiln body 2, turn on the fan 8 and the heating mechanism 7 in the kiln body 2, and raise the temperature in the kiln body 2 to the set temperature, wherein the primary drying temperature is set at 70°C to 95°C, and the secondary drying temperature is set at 50°C to 70°C.

[0072] S2. Opening device: Open the feeding mechanism 1 and the multi-layer bamboo material conveying mechanism 6 in the kiln body 2, so that the running line speed of the chain transmission component of the feeding mechanism 1 and the chain conveying component of the bamboo material conveying mechanism 6 are consistent. The running speed of the bamboo material conveying mechanism 6 can be comprehensively determined according to factors such as the bamboo bundle paving thickness, initial moisture content and final moisture content, medium temperature, length of each layer of the bamboo material conveying mechanism 6, and the number of layers of the bamboo material conveying mechanism 6. The running line speed is usually controlled at 1m / min to 5m / min.

[0073] S3. Bamboo bundle loading: Bamboo materials (usually bamboo bundles) are evenly laid on the chain transmission assembly of the loading mechanism 1 by mechanical or manual loading. The number of layers of bamboo bundles is controlled at 1-6 layers. The bamboo bundles can be laid manually or automatically by a thickness determination device.

[0074] S4, drying treatment: the feeding mechanism 1 transports the evenly laid bamboo bundles to the feeding end of the uppermost bamboo material conveying mechanism 6, and the bamboo bundles move driven by the chain conveying assembly of the bamboo material conveying mechanism 6. When the bamboo bundles move to the other end of the bamboo material conveying mechanism 6 of this layer, the bamboo bundle conveying mechanism 6 pauses, and after a rest of 10 minutes to 30 minutes, it continues to move. Under the joint action of the material guiding mechanism 9 (such as a guide plate) and gravity, the bamboo bundles flip downward and fall onto the next layer of bamboo material conveying mechanism 6 moving in the opposite direction at the same speed. When the bamboo bundles move to the other end of the bamboo material conveying mechanism 6 of this layer (i.e., the distance of one layer of bamboo material conveying mechanism 6), the bamboo material conveying mechanism 6 pauses again, and after a rest of 10 minutes to 30 minutes, it continues to move, and the bamboo bundles fall downward onto the next layer of bamboo material conveying mechanism 6 moving in the opposite direction at the same speed. After so many round trips, the dried bamboo bundles fall onto the bamboo material conveying mechanism 6 of the lowermost layer. The number of layers of the multi-layer bamboo material conveying mechanism 6 is 3 to 12 layers; during the drying process, the temperature in the kiln body 2 is kept constant, and the relative humidity is controlled between 45% and 65%, which can be regulated by the control module 5.

[0075] S5, bamboo bundles out of the kiln: the dried bamboo bundles on the bottom bamboo material conveying mechanism 6 are transported to the outside of the kiln body 2 through the discharging mechanism 3 (extension section of the chain conveying assembly), and then the dried bamboo bundles are unloaded from the discharging mechanism 3 and bundled by mechanical unloading or manual unloading to obtain bamboo bundles, and the weight of each bamboo bundle is controlled to be 3kg to 15kg.

[0076] S6. Balancing treatment: stack the above-mentioned bamboo bundles in a balancing warehouse for balancing treatment, arrange multiple bamboo bundles into multiple layers of bamboo bundles arranged up and down, separate the upper and lower layers of bamboo bundles with a thickness of 3cm to 8cm, and retain 5cm to 10cm of air flow channels between the bamboo bundles in the same layer. The temperature of the balancing warehouse is controlled between 25 and 30°C, and the relative humidity is controlled between 60% and 80%.

[0077] S7, falling material cleaning: when the bamboo bundle moves in the kiln body 2 or flips over and falls from the upper bamboo material conveying mechanism 6 to the lower bamboo material conveying mechanism 6, the bamboo powder or bamboo chips on the bamboo bundle will fall onto the bamboo powder collecting and conveying mechanism 4 at the bottom of the kiln body 2. When the bamboo powder or bamboo chips on the bamboo powder collecting and conveying mechanism 4 accumulate to a certain extent, the bamboo powder collecting and conveying mechanism 4 can be driven by a motor to convey the bamboo powder or bamboo chips to the outside of the kiln body 2. The conveying speed of the bamboo powder collecting and conveying mechanism 4 is controlled within 20 m / min.

[0078] Example 4

[0079] An intermittent bamboo drying method of the present invention is implemented using the intermittent bamboo drying device of Example 1 (including a top blower drying kiln body), comprising the following steps:

[0080] S1. Kiln preheating: close the air inlet 25 and the air outlet 26 of the kiln body 2, turn on the fan 8 and the heating mechanism 7 in the kiln body 2, and use a secondary drying method to increase the temperature in the kiln body 2 and maintain it at 60°C.

[0081] S2. Opening device: Open the feeding mechanism 1 and the multi-layer bamboo material conveying mechanism 6 in the kiln body 2, so that the running linear speed of the chain transmission component of the feeding mechanism 1 and the chain conveying component of the bamboo material conveying mechanism 6 are consistent, and the running linear speed is 4m / min.

[0082] S3. Bamboo bundle loading: The glue-impregnated bamboo bundles are evenly laid on the chain transmission assembly of the loading mechanism 1 outside the kiln by manual loading, and the number of layers of the glue-impregnated bamboo bundles is 1.

[0083] S4, drying treatment: the feeding mechanism 1 transports the evenly laid bamboo bundles to the feeding end of the uppermost bamboo material conveying mechanism 6, and the impregnated bamboo bundles move driven by the chain conveying assembly of the bamboo material conveying mechanism 6. When the impregnated bamboo bundles move to the other end of the bamboo material conveying mechanism 6 of this layer, the bamboo bundle conveying mechanism 6 pauses, and after a rest of 15 minutes, it continues to move. Under the joint action of the material guiding mechanism 9 (such as a guide plate) and gravity, the bamboo bundles flip downward and fall onto the next layer of bamboo material conveying mechanism 6 moving in the opposite direction at the same speed. When the bamboo bundles move to the other end of the bamboo material conveying mechanism 6 of this layer (i.e., the distance of 36m of the length of one layer of bamboo material conveying mechanism 6), the bamboo material conveying mechanism 6 pauses again, and after a rest of 15 minutes, it continues to move, and the bamboo bundles fall downward onto the next layer of bamboo material conveying mechanism 6 moving in the opposite direction at the same speed. After 6 round trips, the dried bamboo bundles fall onto the bamboo material conveying mechanism 6 of the lowermost layer. The multi-layer bamboo material conveying mechanism 6 has 7 layers, and the effective length of each layer is 36 meters. During the drying process, the temperature in the kiln body 2 is kept constant, and the relative humidity is controlled at 50%, which can be regulated by the control module 5.

[0084] S5, bamboo bundles out of the kiln: the dried bamboo bundles on the bottom bamboo material conveying mechanism 6 are transported to the outside of the kiln body 2 through the discharging mechanism 3 (extension section of the chain conveying assembly), and then the dried bamboo bundles are unloaded from the discharging mechanism 3 and bundled by mechanical unloading or manual unloading. The weight of each bamboo bundle is controlled at 5kg.

[0085] S6. Balancing treatment: The bundled dried bamboo bundles are stacked in a balancing warehouse for balancing treatment. Multiple bamboo bundles are arranged into multiple layers of bamboo bundles, and the upper and lower layers of bamboo bundles are separated by a 3 cm thick partition bar. A 6 cm air flow channel is retained between the bamboo bundles in the same layer. The temperature in the balancing warehouse is controlled at 27°C and the relative humidity is controlled at 65%.

[0086] S7, falling material cleaning: when the bamboo bundle moves in the kiln body 2 or flips over and falls from the upper bamboo material conveying mechanism 6 to the lower bamboo material conveying mechanism 6, the bamboo powder or bamboo chips on the bamboo bundle will fall onto the bamboo powder collecting and conveying mechanism 4 at the bottom of the kiln body 2. When the bamboo powder or bamboo chips on the bamboo powder collecting and conveying mechanism 4 accumulate to a certain extent, the bamboo powder collecting and conveying mechanism 4 can be driven by a motor to convey the bamboo powder or bamboo chips to the outside of the kiln body 2. The conveying speed of the bamboo powder collecting and conveying mechanism 4 is controlled at 5m / min.

[0087] The total drying time of the impregnated bamboo bundle is about 168 minutes. Compared with the conventional periodic vertical kiln drying, the drying time is shortened by 90%, and the drying uniformity is improved by 60%. Compared with the traditional continuous mesh belt drying, the running time of the transmission chain is reduced by 60%, and the total drying energy consumption is reduced by about 10%. If the transmission chain runs too slowly and the intermittent residence time is too long, the moisture content of the impregnated bamboo bundle will be too low, which will affect the fluidity of the adhesive during the hot pressing process and ultimately affect the gluing quality of the reconstructed bamboo; if the transmission chain runs too fast and the intermittent residence time is too short, the moisture content of the impregnated bamboo bundle will be too high, which will ultimately affect the gluing quality of the reconstructed bamboo.

[0088] Example 5

[0089] An intermittent bamboo drying method of the present invention is implemented using the intermittent bamboo drying device of Example 2 (including a side blower drying kiln body). The process of this method is basically the same as that of Example 4, except that: the temperature inside the kiln body is set at 65°C, and the number of layers of the impregnated bamboo bundles is 3; the number of layers of the multi-layer bamboo conveying mechanism 6 in the kiln body 2 is 9, the effective length of each layer is 40 meters, the running speed of the bamboo conveying mechanism 6 is 2.5m / min, and the intermittent stop time of each time is 18min; during the drying process, the relative humidity of the drying medium in the kiln body is controlled at 52%.

[0090] Example 6

[0091] An intermittent bamboo drying method of the present invention is implemented using the intermittent bamboo drying device of Example 3 (including an end fan drying kiln body). The process of this method is basically the same as that of Example 4, except that: the dried bamboo bundles are unimpregnated bamboo bundles, a one-time drying method is adopted, the temperature in the kiln body 2 is set at 85°C, and the number of layers of bamboo bundles is 2; the number of layers of the multi-layer bamboo conveying mechanism 6 in the kiln body 2 is 6, the effective length of each layer is 8 meters, the running speed of the bamboo conveying mechanism 6 is 2m / min, and the intermittent stop time of each time is 25min; during the drying process, the relative humidity of the drying medium in the kiln body is controlled at 60%.

[0092] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above in the preferred embodiment, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention, still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An intermittent bamboo drying device, characterized in that: The kiln comprises a feeding mechanism (1), a kiln body (2), a discharging mechanism (3) and a bamboo powder collecting and conveying mechanism (4). The kiln body (2) is provided with a plurality of bamboo material conveying mechanisms (6) arranged side by side up and down to form multiple layers. In the bamboo material conveying mechanisms (6) of adjacent layers, the feeding end of the bamboo material conveying mechanism (6) of the lower layer is arranged correspondingly below the discharging end of the bamboo material conveying mechanism (6) of the upper layer, and is used to receive bamboo material dropped from the discharging end of the bamboo material conveying mechanism (6) of the upper layer. The feeding mechanism (1) is connected to the feeding end of the bamboo material conveying mechanism (6) of the uppermost layer, and the discharging mechanism (3) is connected to the discharging end of the bamboo material conveying mechanism (6) of the lowermost layer. The bamboo powder collecting and conveying mechanism (4) is arranged below the bamboo material conveying mechanism (6) of the lowermost layer, and is used to collect the dropped bamboo material on the multiple layers of bamboo material conveying mechanisms (6) above.

2. The intermittent bamboo drying device according to claim 1, characterized in that: The kiln body (2) is provided with a first chamber (21) and a second chamber (22), the first chamber (21) and the second chamber (22) are connected via a first connecting port (23) and a second connecting port (24), each of the bamboo material conveying mechanisms (6) is arranged in the first chamber (21), a heating mechanism (7) is arranged in the first chamber (21) and / or the second chamber (22), a fan (8) is arranged in the second chamber (22) or at the first connecting port (23), and an air inlet (25) and an air outlet (26) are arranged on the kiln body (2), the air inlet (25) is connected to the second chamber (22), and the air outlet (26) is connected to the first chamber (21) or the second chamber (22).

3. The intermittent bamboo drying device according to claim 2, characterized in that: The second chamber (22) is located above the first chamber (21); a partition (27) is provided between the first connecting port (23) and the second connecting port (24) in the second chamber (22); a connecting hole (271) is provided on the partition (27); the fan (8) is arranged at the connecting hole (271); the air inlet (25) and the air outlet (26) are respectively connected to the space on both sides of the partition (27); and the heating mechanism (7) is respectively arranged on both sides of the partition (27) in the second chamber (22).

4. The intermittent bamboo drying device according to claim 2, characterized in that: The second chamber (22) is arranged at a lower part of one side of the first chamber (21); the heating mechanism (7) is arranged in the first chamber (21) and at the second connecting port (24), respectively; the fan (8) is arranged at the first connecting port (23); the air inlet (25) is connected to the second chamber (22); and the air outlet (26) is connected to the first chamber (21).

5. The intermittent bamboo drying device according to claim 2, characterized in that: The second chamber (22) is arranged on one side of the first chamber (21); a partition (27) is arranged between the second chamber (22) and the first connecting port (23) and the second connecting port (24); a connecting hole (271) is arranged on the partition (27); the fan (8) is arranged at the connecting hole (271); the air inlet (25) and the air outlet (26) are respectively connected to the space on both sides of the partition (27); and the heating mechanism (7) is arranged on one side of the partition (27) in the second chamber (22).

6. The intermittent bamboo material drying device according to any one of claims 1 to 5, characterized in that: It also comprises a control module (5) for regulating the temperature and humidity in the kiln body (2); the loading mechanism (1), the discharging mechanism (3) and the multi-layer bamboo material conveying mechanism (6) are all connected to the control module (5).

7. The intermittent bamboo material drying device according to any one of claims 1 to 5, characterized in that: A material guiding mechanism (9) is provided between the feeding end and the discharging end of the bamboo material conveying mechanism (6) of adjacent layers; a feeding port (201) is provided at the top of one side of the kiln body (2), and a discharging port (202) is provided at the bottom of the other side, or a feeding port (201) is provided at the top of one side of the kiln body (2), and a discharging port (202) is provided at the bottom; the loading mechanism (1) is connected to the bamboo material conveying mechanism (6) of the uppermost layer through the feeding port (201), and the discharging mechanism (3) is connected to the bamboo material conveying mechanism (6) of the lowermost layer through the discharging port (202).

8. The intermittent bamboo material drying device according to any one of claims 1 to 5, characterized in that: The bamboo material conveying mechanism (6) comprises a plurality of rows of chain conveying components arranged horizontally and spaced apart; the feeding mechanism (1) comprises a chain transmission component.

9. An intermittent bamboo drying method, characterized in that: The intermittent bamboo drying device according to any one of claims 1 to 8 is implemented, comprising the following steps: The air inlet (25) and the air outlet (26) provided in the kiln body (2) are closed, the fan (8) and the heating mechanism (7) provided in the kiln body (2) are turned on, the temperature in the kiln body (2) is raised to a set temperature, the feeding mechanism (1) and the multi-layer bamboo material conveying mechanism (6) are turned on, the feeding mechanism (1) conveys the bamboo material to the feeding end of the bamboo material conveying mechanism (6) on the uppermost layer, and when the bamboo material moves to the other end of the bamboo material conveying mechanism (6) on that layer, the bamboo material conveying mechanism (6) stops moving, and the bamboo material conveying mechanism (6) is temporarily stopped. After a set pause time, the bamboo material continues to move, and the bamboo material turns downward and falls onto the bamboo material conveying mechanism (6) of the next layer that moves in the opposite direction at the same speed. When the bamboo material moves to the other end of the bamboo material conveying mechanism (6) of this layer, the bamboo material conveying mechanism (6) stops moving again, and after a set pause time, the bamboo material continues to move downward and falls onto the bamboo material conveying mechanism (6) of the next layer that moves in the opposite direction at the same speed. After such multiple round trips, the dried bamboo material falls onto the bamboo material conveying mechanism (6) of the lowest layer and is conveyed to the outside of the kiln body (2) through the discharging mechanism (3).

10. The intermittent bamboo drying method according to claim 9, characterized in that: When the primary drying method is adopted, the temperature in the kiln body (2) is increased to 70° C. to 95° C., and when the secondary drying method is adopted, the temperature in the kiln body (2) is increased to 50° C. to 70° C.; during the drying process, the temperature in the kiln body (2) is kept constant, and the relative humidity is controlled between 45% and 65%; When conveying bamboo, the chain transmission assembly provided by the feeding mechanism (1) and the chain conveying assembly provided by the bamboo conveying mechanism (6) maintain a consistent running line speed, the running line speed is controlled at 1 m / min to 5 m / min, the intermittent setting time is controlled at 10 min to 30 min, and the number of layers of the bamboo conveying mechanism (6) is controlled at 3 to 12 layers; The dried bamboos sent out of the kiln body (2) are bundled to obtain bamboo bundles, the weight of each bamboo bundle is controlled to be 3kg to 15kg, and the multiple bamboo bundles are arranged into multiple layers of bamboo bundles arranged up and down, and two adjacent bamboo bundle layers are separated by a partition bar, the thickness of the partition bar is 3cm to 8cm, and an air flow channel of 5cm to 10cm is reserved between the bamboo bundles in the same layer; and a balancing treatment is performed, the balancing temperature is controlled between 25°C and 30°C, and the relative humidity is controlled between 60% and 80%; When the bamboo material moves in the kiln body (2) or turns over and falls from the upper bamboo material conveying mechanism (6) to the lower bamboo material conveying mechanism (6), the bamboo powder or bamboo scraps on the bamboo material fall onto the bamboo powder collecting and conveying mechanism (4) and are finally conveyed to the outside of the kiln body (2). The conveying speed of the bamboo powder collecting and conveying mechanism (4) is controlled within 20 m / min. The bamboo material includes one or both of bamboo bundles and bamboo strips; The temperature and humidity in the kiln body (2) are controlled by the control module (5).

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