A multi-veneer wood drying equipment

Abstract

This invention provides a multi-veneer wood drying device, comprising: a hot air device, an oven device, and a wood conveying device; wherein, the hot air device is used to generate heating gas and transmit the heating gas to the oven device to achieve hot air drying of the veneer wood; the oven device is arranged on one side of the hot air device outlet to provide a sealed or non-sealed space for wood drying; the wood conveying device is arranged inside the oven device and along the length of the oven device to hold a plurality of veneer wood pieces, and the wood conveying device has at least two layers, upper and lower, for conveying the veneer wood pieces and circulating them within the oven device until drying is complete. The drying device in this embodiment can replace the traditional flat-laying method of veneer wood drying, can dry large quantities of veneer wood, and has good drying quality and high drying efficiency.

Description

Technical Field

[0001] This invention relates to the field of wood processing, and more particularly to a multi-veneer wood drying equipment. Background Technology

[0002] Drying of plank timber is a crucial wood processing step that improves timber quality, performance, and utilization while meeting the requirements of various applications, making it an indispensable part of the timber processing industry. Freshly felled timber contains a large amount of moisture. Without drying, the high moisture content makes it prone to the growth of mold and fungi, leading to rot and mildew, thus reducing the quality of the timber. After drying, the moisture content of the timber is reduced, and its weight is also reduced. This not only facilitates the transportation of timber but also helps to improve the overall utilization rate of timber. Drying can reduce the shrinkage, deformation, and cracking of timber, thereby improving its mechanical properties, such as bending, compressive, and tensile strength. Drying can improve the stability and durability of timber, making it more suitable for applications in construction, furniture, and other fields. Dried timber is easier to process and manufacture in subsequent stages. Drying can shorten the timber production cycle. In fields such as construction and furniture manufacturing, time is often a critical factor, so accelerating the timber processing through drying can improve production efficiency.

[0003] In southern regions, where timber is primarily sourced, traditional solar drying methods are still used. Natural air drying involves piling timber in open areas or sheds, utilizing the atmosphere as a heat and moisture transfer medium and solar radiation for convection heat exchange to remove moisture. Due to limitations imposed by natural conditions, this method is time-consuming, requires large areas, and results in high moisture content, warping, susceptibility to insects and mold, and high labor costs. While existing air-source heat pump dryers are primarily used for drying diverse materials and are suitable for many industries, they have limitations in the simple drying of timber, resulting in smaller quantities of timber being dried and higher operating costs. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a multi-veneer wood drying device to eliminate or improve one or more defects existing in the prior art.

[0005] The technical solution of the present invention is as follows:

[0006] A multi-veneer wood drying device, the drying device comprising: a hot air device, a drying oven device, and a wood conveying device;

[0007] The hot air device is at least used to generate heating gas and transmit the heating gas to the drying oven to achieve hot air drying of veneer wood;

[0008] The drying oven is arranged on one side of the hot air outlet of the hot air device to provide a closed or non-closed space for drying wood.

[0009] The wood conveying device is arranged inside the drying oven and along the length of the drying oven. It is used to place a number of veneer wood pieces. The wood conveying device has at least two layers, upper and lower, and is used to convey the veneer wood pieces so that they circulate within the drying oven until drying is complete.

[0010] In some embodiments, the drying oven apparatus includes a drying chamber and at least one cooling corridor, the cooling corridor being arranged at least on one side of the drying chamber and communicating with the drying chamber and the hot air device, for returning cooled gas to the hot air device.

[0011] In some embodiments, the drying chamber is connected to the hot air device, and the drying device is provided with an inclined plate, a top plate and / or a bottom plate.

[0012] The inclined plate is located on the side of the drying chamber facing the hot air device. The drying chamber is provided with at least a main air inlet, a top air inlet and / or a bottom air inlet at the part of the inclined plate, which are respectively used to correspond to the main drying chamber, the top air inlet channel and / or the bottom air inlet channel where the veneer wood is located.

[0013] In some embodiments, the top plate is arranged parallel to the top of the main drying chamber, the bottom plate is arranged parallel to the bottom of the main drying chamber, and the inclined plate is arranged at one end of the main drying chamber facing the hot air device and is inclined from top to bottom toward one side of the main drying chamber.

[0014] At least one of the top plate, bottom plate, and inclined plate is used to absorb and store heat, such that the top plate radiates heat to the top, bottom, or side of the veneer wood.

[0015] The top air inlet channel and / or the bottom air inlet channel are designed as a sealed structure at non-air inlet locations, or are connected to the main drying chamber at the end or middle of the top air inlet channel and / or the bottom air inlet channel.

[0016] In some embodiments, the hot air device includes a main furnace, a first auxiliary furnace, and a ventilation device;

[0017] The main furnace and the first auxiliary furnace are connected through a first flue gas passage at their upper parts to realize the waste heat recovery of the flue gas from the main furnace by the first auxiliary furnace.

[0018] The main furnace is equipped with a first heat exchanger, which is arranged along the length of the oven device. The first heat exchanger is used to realize the heat exchange between the inside and outside of the main furnace to heat the gas.

[0019] A second heat exchanger is arranged inside the first auxiliary furnace. The second heat exchanger is arranged along the length of the oven device. The second heat exchanger is used to realize the heat exchange between the inside and outside of the first auxiliary furnace to heat the gas.

[0020] The ventilation device is installed at a position corresponding to the positions of the first heat exchanger and the second heat exchanger. The ventilation device is arranged on the side of the main furnace and the first auxiliary furnace away from the oven device, and is used to blow cooling gas toward the first heat exchanger for heating, forming a heated airflow that then enters the oven device. And / or, the ventilation device is arranged on the side of the main furnace and the first auxiliary furnace facing the oven device, and is used to draw out the gas heated by the first heat exchanger and blow it toward the oven device.

[0021] In some embodiments, the hot air device further includes a second auxiliary furnace, which is connected to the first auxiliary furnace through a second flue gas passage at its upper part, for realizing the condensation of water vapor or water vapor in the return gas;

[0022] A third heat exchanger is arranged inside the second auxiliary furnace to dissipate heat from the second auxiliary furnace to the outside, or to increase the condensation surface area inside the furnace;

[0023] At least one of the first heat exchanger, the second heat exchanger, and the third heat exchanger is at least one of the following: plate heat exchanger, finned heat exchanger, spiral heat exchanger, and shell-and-tube heat exchanger.

[0024] In some embodiments, the cooling corridor includes a first cooling corridor disposed on one side of the drying oven assembly in the width direction. The first cooling corridor communicates with the middle and / or tail end of the drying oven body and with one and / or two layers of the drying oven body. The first cooling corridor is also configured to communicate with the main furnace and / or the first auxiliary furnace for returning cooled gas to the main furnace and / or the first auxiliary furnace; and / or

[0025] The cooling corridor includes a second cooling corridor, which is arranged on the other side of the oven assembly in the width direction. The second cooling corridor is connected to the middle and / or tail end of the drying chamber. The second cooling corridor is connected to the first and / or second layers of the drying chamber. The second cooling corridor is also configured to be connected to the main furnace and / or the first auxiliary furnace for returning the cooled gas to the main furnace and / or the first auxiliary furnace.

[0026] In some embodiments, the first cooling corridor and / or the second cooling corridor are disposed inside or outside the drying chamber; and / or

[0027] The first cooling corridor and / or the second cooling corridor have a stepped structure, with the upper step shorter than the lower step. The upper step connects to the second floor of the drying chamber, with the connection point located at the middle of the upper step connection point along the length of the drying chamber, and is equipped with a ventilation fan. The lower step connects to the first floor of the drying chamber, with the connection point located at the rear of the lower step connection point along the length of the drying chamber; and / or

[0028] The first cooling corridor is located on the side of the oven assembly corresponding to the main furnace. The first cooling corridor also includes a main reflux channel and a first auxiliary furnace inlet channel. The main reflux channel is connected to the air inlet of the first heat exchanger and / or the second heat exchanger. One of the first auxiliary furnace inlet channels is connected to the upper part of the first auxiliary furnace, and the other is connected to the lower part of the first auxiliary furnace; and / or

[0029] The second cooling corridor is located on the side of the oven device corresponding to the first auxiliary furnace. The second cooling corridor also includes a second inlet channel for the first auxiliary furnace, one of which is connected to the upper part of the first auxiliary furnace, and the other is connected to the lower part of the first auxiliary furnace.

[0030] The first inlet channel and the second inlet channel of the first auxiliary furnace are used to introduce cooled gas containing water vapor into the furnace of the first auxiliary furnace. After mixing with the flue gas from the main furnace, the heat of the steam-like gas in the first auxiliary furnace is more easily absorbed by the second heat exchanger and used to heat the drying gas circulating outside the furnace.

[0031] In some embodiments, a water storage tank is provided at the bottom of the second auxiliary furnace, the water storage tank being in communication with the furnace interior of the second auxiliary furnace for collecting condensate from the second auxiliary furnace, and the water storage tank being equipped with a drain pipe; and / or

[0032] The upper middle part of the second auxiliary furnace is equipped with a pressure relief pipe or an exhaust pipe; and / or

[0033] The main furnace is any one of a gas-fired furnace, an oil-fired furnace, an electric furnace, a coal-fired furnace, an industrial combustion furnace, or a biomass combustion furnace; and / or

[0034] The hot air device is equipped with a conveyor belt for feeding the main furnace.

[0035] In some embodiments, at least one outer wall of the main furnace is provided with first heat dissipation fins for dissipating heat from the circulating gas participating in the drying process within the hot air device; and / or

[0036] The outer wall of the first flue gas passage is provided with a second heat dissipation fin to dissipate the heat of the circulating gas participating in the drying process within the hot air device; and / or

[0037] The second flue gas passage is equipped with an overflow fan, which makes it easier for the gas in the first auxiliary furnace to enter the second auxiliary furnace; and / or

[0038] The ventilation device includes a blower and a ventilator. The blower has a larger power than the ventilator. The blower is located on the air inlet side of the first heat exchanger of the main furnace, and the ventilator is located on the air inlet side of the second heat exchanger of the first auxiliary furnace.

[0039] In some embodiments, the timber conveying device includes:

[0040] The flexible transmission mechanism includes a transmission component using belt drive or chain drive and a matching transmission wheel. The transmission component is mounted on the transmission wheel and extends along the length direction of the oven device. Two sets of the flexible transmission mechanism are symmetrically arranged in the width direction of the oven device. The flexible transmission mechanism is located at the middle position in the height direction of the oven device to divide its main drying chamber into upper and lower layers.

[0041] Several wooden carrying baskets, each including a base and a basket frame, the basket frame having multiple slots for vertically inserting veneer wood; the bottom end of the base is fixedly mounted on the transmission components on both sides, and the basket frame is connected to the top end of the base by a pin, so that the basket frame can be kept horizontal by gravity; when multiple wooden carrying baskets are arranged, each wooden carrying basket is spaced apart.

[0042] In some embodiments, the transmission component is a double-row chain, which is divided and fixedly connected by a fixedly provided baffle. The baffle has a raised upright plate, which is fixedly connected to the base of the wooden basket.

[0043] The top of the wooden basket has a vertical rod extending downwards. The vertical rod is connected to the top of the base by a pin. The length of the vertical rod is configured such that the height of the center of gravity of the wooden basket after bearing the wooden planks is lower than the center of the pin.

[0044] The timber conveying device further includes a corner guide, which is fixedly installed on the outside of the transmission wheel of the transmission member to prevent the transmission member from being driven to jump by the baffle with the upright plate.

[0045] The multi-veneer wood drying equipment in this embodiment of the invention can be used for large-scale wood hot air drying processes, replacing the traditional flat-laying drying method of veneer wood. It can dry a large amount of veneer wood with good drying quality and high drying efficiency.

[0046] Additional advantages, objects, and features of the invention will be set forth in part in the description which follows, and will also become apparent in part to those skilled in the art upon studying the following text, or may be learned by practice of the invention.

[0047] Those skilled in the art will understand that the objectives and advantages achievable with the present invention are not limited to those specifically described above, and that the above and other objectives achievable with the present invention will become clearer from the following detailed description. Attached Figure Description

[0048] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, are not intended to limit the scope of the invention. The components in the drawings are not drawn to scale but are merely illustrative of the principles of the invention. For ease of illustration and description of certain parts of the invention, corresponding portions in the drawings may be enlarged, i.e., may appear larger relative to other components in an exemplary device actually manufactured according to the invention. In the drawings:

[0049] Figure 1 This is a three-dimensional structural diagram of a multi-veneer wood drying device according to an embodiment of the present invention.

[0050] Figure 2 This is a top view of a multi-veneer wood drying device according to an embodiment of the present invention.

[0051] Figure 3 for Figure 2 A half-section stereoscopic view.

[0052] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0053] Figure 5 This is a three-dimensional structural diagram of an oven device according to an embodiment of the present invention.

[0054] Figure 6 This is a top view of an oven apparatus according to an embodiment of the present invention.

[0055] Figure 7 for Figure 6 A half-section stereoscopic view.

[0056] Figure 8 This is a three-dimensional structural diagram of a portion of the hot air device in one embodiment of the present invention.

[0057] Figure 9 This is a three-dimensional structural diagram of a portion of the hot air device in one embodiment of the present invention, taken from another perspective.

[0058] Figure 10This is a cross-sectional schematic diagram of a portion of the hot air device structure in one embodiment of the present invention.

[0059] Figure 11 This is a three-dimensional structural diagram of a portion of the timber conveying device in one embodiment of the present invention.

[0060] Figure 12 This is a schematic diagram of the principle of a multi-veneer wood drying device according to an embodiment of the present invention.

[0061] Figure 13 This is a schematic diagram of the air inlet channel of an oven device in one embodiment of the present invention.

[0062] Figure label:

[0063] 1. Hot air device; 11. Main furnace; 111. First heat exchanger; 112. First heat dissipation fins; 12. First auxiliary furnace; 121. Second heat exchanger; 13. Second auxiliary furnace; 131. Third heat exchanger; 132. Exhaust pipe; 14. Ventilation device; 141. Blower; 142. Ventilator; 101. First flue gas passage; 101-1. Second heat dissipation fins; 102. Second flue gas passage; 102-1. Flow fan; 15. Water storage tank; 151. Drain pipe; 16. Conveyor belt device;

[0064] 2. Drying Oven Device; 21. Drying Chamber Body; 211. Inclined Plate; 212. Top Plate; 213. Bottom Plate; 21-1. Main Air Inlet; 21-2. Top Air Inlet; 21-3. Bottom Air Inlet; 21-A. Main Drying Chamber; 21-B. Top Air Inlet Channel; 21-C. Bottom Air Inlet Channel; 22. First Cooling Corridor; 221. Main Reflux Channel; 222A. First Inlet Channel of First Auxiliary Furnace; 222B. Second Inlet Channel of First Auxiliary Furnace; 23. Second Cooling Corridor;

[0065] 3. Timber conveying device; 31. Flexible transmission mechanism; 311. Transmission component; 312. Transmission wheel; 313. Baffle; 314. Vertical plate; 32. Wooden board basket; 321. Base; 322. Basket; 323. Pin; 324. Vertical rod; 33. Corner guide. Detailed Implementation

[0066] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this invention are used to explain the invention, but are not intended to limit the invention.

[0067] It should also be noted that, in order to avoid obscuring the invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the invention are shown in the accompanying drawings, while other details that are not closely related to the invention are omitted.

[0068] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, element, step, or component, but does not exclude the presence or addition of one or more other features, elements, steps, or components.

[0069] It should also be noted that, unless otherwise specified, the term "connection" in this article can refer not only to a direct connection, but also to an indirect connection involving an intermediary.

[0070] In the following description, embodiments of the invention will be illustrated with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar parts, or the same or similar steps.

[0071] To address or improve upon the existing methods of drying veneer wood and the poor applicability of existing drying equipment, this invention provides a multi-veneer wood drying device (hereinafter referred to as the drying device). This drying device replaces the traditional method of laying veneer wood flat to dry, and can dry a large quantity of veneer wood with good drying quality and high drying efficiency.

[0072] In some embodiments, such as Figure 1 As shown, the drying equipment includes: a hot air device 1, a drying oven device 2, and a wood conveying device 3, etc.

[0073] The hot air device 1 is used to generate heating gas and transmit the heating gas to the drying oven 2 to achieve hot air drying of the veneer wood. The drying oven 2 is arranged on one side of the hot air device 1 to provide a sealed or non-sealed space for drying the wood. The wood conveying device 3 is arranged inside the drying oven 2 and along the length of the drying oven 2. It is used to place a number of veneer wood pieces. The wood conveying device 3 has at least two layers and is used to convey the veneer wood pieces, allowing them to circulate within the drying oven 2 until drying is complete.

[0074] In the above embodiments, the hot air device 1 is mainly used to generate heated gas and allow the gas to enter the drying oven device 2. The hot air device 1 can use various heating methods, such as electric heating, gas heating, and biomass energy, to provide the necessary heat energy and realize the hot air drying process of the wood. The design of the drying oven device 2 allows for the creation of a controlled environment inside, enabling the wood to be heated and ventilated evenly to ensure the drying effect. The closed or non-closed space mentioned here refers to the state of communication between the drying oven device 2 and the outside atmosphere, such as complete isolation and sealing, or it may also have a certain pressure relief port or ventilation port to prevent safety accidents caused by excessive air pressure inside the device. The wood conveying device 3 of the drying oven device 2 is arranged in at least two layers, that is, a large number of wooden boards can be arranged at different heights, saving floor space. The wood conveying device 3 can move the wood in various ways, such as double-layer up-and-down circular movement or single-layer reciprocating movement.

[0075] The drying equipment in this embodiment of the invention operates as follows: Hot air device 1 generates heated gas and transmits it to oven device 2. Oven device 2 provides a space where the wood can be heated and ventilated. Wood conveying device 3 is responsible for placing the veneer wood in a suitable position and circulating it within oven device 2 to ensure thorough drying.

[0076] In some embodiments, such as Figure 2 , Figure 5 and Figure 6 As shown, the drying oven device 2 includes a drying chamber 21 and at least one cooling corridor. The cooling corridor is arranged at least on one side of the drying chamber 21 and is connected to the drying chamber 21 and the hot air device 1, for returning cooled gas to the hot air device 1. One of the functions of the cooling corridor is to return cooled gas to the hot air device 1, which helps to save energy and reduces the system's heat loss by reusing the cooled gas.

[0077] In the above embodiments, the cooling corridor can be a sealed structure such as a channel or pipe, used to receive cooling gas inside the drying chamber 21. This cooling gas may also carry a large amount of moisture volatilized from the veneer wood. The cooling corridor is connected to the drying chamber 21 and the hot air device 1, ensuring that the gas generated by the hot air device 1 can flow back to the hot air device 1 after cooling. This circulation design helps improve the system's energy efficiency and facilitates the return of moisture volatilized from the veneer wood to the hot air device 1 for condensation and discharge or participation in part of the thermal circulation process.

[0078] The drying equipment in this embodiment of the invention can be used for large-scale wood hot air drying processes, wherein the cyclical design of drying and cooling helps to improve the efficiency of the entire system. In practical applications, this drying equipment can be precisely controlled and monitored to ensure optimal drying effect and energy utilization.

[0079] In some embodiments, such as Figure 3 and Figure 7 As shown, the drying chamber 21 is connected to the hot air device 1. The drying device is provided with an inclined plate 211, a top plate 212 and / or a bottom plate 213. The inclined plate 211 is located on the side of the drying chamber 21 facing the hot air device 1. The drying chamber 21 is provided with at least a main air inlet 21-1, a top air inlet 21-2 and / or a bottom air inlet 21-3 at the position of the inclined plate 211, which are respectively used to correspond to the main drying chamber 21-A, the top air inlet channel 21-B and / or the bottom air inlet channel 21-C where the veneer wood is located.

[0080] The air inlet path or heat transfer method of the heating airflow in the drying chamber 21 of the present invention can be designed in various ways. For example, only thermal convection heating of the heating airflow is used. In this case, all the heating airflow can be introduced into the main drying chamber 21-A. Given that the main drying chamber 21-A is relatively long, and the end near the hot air device 1 receives a large amount of high-temperature heating airflow, while the end away from the hot air device 1 (the end) will inevitably have a lower end temperature if it relies solely on the flow of heating airflow in the main drying chamber 21-A.

[0081] To achieve multiple air intake methods, multiple air intake ducts or inlets can be designed, such as the main air inlet 21-1, the top air inlet 21-2, and / or the bottom air inlet 21-3, corresponding respectively to the main drying chamber 21-A, the top air intake channel 21-B, and / or the bottom air intake channel 21-C where the veneer wood is located. Figure 13 As shown, optionally, the top air intake channel 21-B and / or the bottom air intake channel 21-C can be selectively opened or closed.

[0082] Depending on the type of wood and drying process requirements, such as when uniform temperature drying is selected, the air intake method of the drying chamber 21 can be set to multi-point air intake. Multi-point air intake here includes different air intake positions along its length (such as the front, middle, and end), and also different air intake positions along its height (such as the top and bottom). It is understood that in some embodiments, only the main air inlet 21-1 can be configured to intake air, while the other air intake channels are closed, which can act as a heat storage body or radiant heat source to ensure a certain degree of airtightness, prevent heat loss, or increase the drying effect.

[0083] In some embodiments, such as Figure 3 and Figure 7 As shown, the top plate 212 is arranged parallel to the top of the main drying chamber 21-A, the bottom plate 213 is arranged parallel to the bottom of the main drying chamber 21-A, and the inclined plate 211 is arranged at the end of the main drying chamber 21-A facing the hot air device 1 and is inclined from top to bottom toward the main drying chamber 21-A; at least one of the top plate 212, bottom plate 213 and inclined plate 211 is used to absorb and store heat, such that the top plate 212 radiates heat to the top, bottom or side of the veneer wood; the top air inlet channel 21-B and / or the bottom air inlet channel 21-C are designed as a closed structure sealed at non-air inlet positions, or communicate with the main drying chamber 21-A at the end or middle of the top air inlet channel 21-B and / or the bottom air inlet channel 21-C.

[0084] In the above embodiment, the top plate 212 is arranged parallel to the top of the main drying chamber 21-A, and the bottom plate 213 is arranged parallel to the bottom of the main drying chamber 21-A. These plates not only serve as structural components of the drying chamber 21, but also function to absorb and store heat. The inclined design of the sloping plate 211 helps guide hot air flow into the interior of the main drying chamber 21-A, ensuring that the hot air can evenly cover the veneer wood. During operation, the top plate 212, bottom plate 213, and sloping plate 211 absorb heat and continuously radiate heat to the adjacent veneer wood and the atmosphere of the main drying chamber 21-A, helping to maintain the temperature inside the oven. As at least one possible implementation, these design features optimize the system's hot air flow and heat utilization to improve the drying effect of the wood and the system's energy efficiency; they also emphasize considerations for heat absorption, storage, and release to ensure the stability and consistency of the system.

[0085] Optionally, depending on the functional requirements of the drying system, the heat and humidity conditions it must withstand, and the system design requirements (considering factors such as the physical properties, thermal properties, high-temperature resistance, and cost of the materials), the top plate 212, bottom plate 213, and inclined plate 211 can be made of metal materials, ceramic materials, plastics with good thermal conductivity, heat storage materials, glass fiber, and composite materials. Metal materials, such as aluminum and stainless steel, have good thermal conductivity and corrosion resistance, making them suitable for environments requiring high thermal conductivity and high temperature conditions. Ceramic materials have good thermal insulation and high-temperature resistance, and can be used for heat storage, absorbing heat energy and releasing it when needed. Some special plastics, such as polyamide and polyetheretherketone, have good thermal conductivity and are suitable for applications requiring operation within a specific temperature range. If heat storage is required, specially designed phase change materials or other heat storage materials can be considered; these materials can absorb and release heat energy, helping to maintain the temperature inside the oven. Glass fiber has certain thermal insulation and high-temperature resistance, making it suitable for applications requiring operation in high-temperature environments. Some composite materials, such as carbon fiber composites, have good strength and lightweight properties, making them suitable for applications requiring structural strength and lightweight design.

[0086] Similarly, the drying chamber 21 and cooling corridor of the oven unit 2 can be made of materials with good thermal insulation properties, such as rock wool board (mineral wool board), aluminum silicate felt (fiber felt), polyurethane foam board, glass wool board, foam plastics, and / or composite insulation materials. Rock wool is an insulation material with excellent thermal insulation performance. Rock wool board can be used in the chamber of the oven unit 2 to reduce heat conduction and improve the system's energy efficiency. Aluminum silicate felt is a lightweight and soft insulation material, also suitable for use in insulation chambers. Polyurethane foam board has a low thermal conductivity and is suitable for the insulation design of the chamber. Similar to rock wool, glass wool is another insulation material, often used in environments with high insulation requirements (such as hot air unit 1). Lightweight foam plastics, such as polystyrene (EPS) or polyurethane foam, are also common insulation materials, suitable for some low-temperature applications (such as cooling corridors). When selecting materials, factors such as the structural strength, high-temperature resistance, and corrosion resistance of the chamber also need to be considered, as different application scenarios may require different insulation performance and material properties.

[0087] The hot air device 1 in this embodiment of the invention can employ various heating and air supply methods. As at least one feasible method, such as... Figure 3 , Figure 8 and Figure 9 As shown, the hot air device 1 includes a main furnace 11, a first auxiliary furnace 12, and a ventilation device 14, etc.

[0088] The main furnace 11 and the first auxiliary furnace 12 are connected by a first flue gas passage 101 at their upper parts, so as to realize the waste heat recovery of the flue gas from the main furnace 11 by the first auxiliary furnace 12; this design helps to improve the energy efficiency of the system and effectively utilize thermal energy.

[0089] The main furnace 11 is equipped with a first heat exchanger 111, which is arranged along the length of the oven assembly 2. The first heat exchanger 111 is used to exchange heat between the inside and outside of the main furnace 11 to heat the gas. The first auxiliary furnace 12 is equipped with a second heat exchanger 121, which is also arranged along the length of the oven assembly 2. The second heat exchanger 121 is used to exchange heat between the inside and outside of the first auxiliary furnace 12 to heat the gas. These two heat exchangers, arranged along the length of the oven assembly 2, facilitate heat exchange between the inside and outside of the main furnace 11 and the first auxiliary furnace 12, thereby heating the gas. This configuration helps to create a thermal energy cycle in the system.

[0090] like Figure 10 As shown, the ventilation device 14 is installed in a position corresponding to the positions of the first heat exchanger 111 and the second heat exchanger 121. The ventilation device 14 is arranged on the side of the main furnace 11 and the first auxiliary furnace 12 away from the drying oven 2, and is used to blow cooling gas towards the first heat exchanger 111 for heating, forming a heated airflow that then enters the drying oven 2. Alternatively, the ventilation device 14 is arranged on the side of the main furnace 11 and the first auxiliary furnace 12 facing the drying oven 2, and is used to extract the gas heated by the first heat exchanger 111 and blow it towards the drying oven 2. This design helps to guide the heated gas into the drying oven, achieving hot air drying of the materials.

[0091] As at least one possible implementation, the ventilation device 14 described herein includes not only air circulation equipment such as a fan, but also supports or air chamber enclosures. For example, as Figure 10 As shown, the air inlet side of the first heat exchanger 111 of the main furnace 11 and the second heat exchanger 121 of the first auxiliary furnace 12 is covered by a duct casing, which helps guide the gas flow and prevent external factors from affecting the air inlet. These fans are fixedly mounted on the duct casing by supports, ensuring the stability of the fans during operation and enabling them to effectively draw gas in and blow it into the interior of the heat exchangers. The gas entering the first heat exchanger 111 and the second heat exchanger 121 is drawn in by the fans and blown into the heat exchangers. This design helps to centrally manage gas flow and ensure that it proceeds according to design requirements within the system. The use of the duct casing protects critical components from external environmental interference and guides gas flow, improving system efficiency and stability.

[0092] In some embodiments, the hot air device 1 further includes a second auxiliary furnace 13, which is connected to the first auxiliary furnace 12 via a second flue gas passage 102 at its upper part, for condensing water vapor or water vapor in the return gas. A third heat exchanger 131 is arranged inside the second auxiliary furnace 13 for dissipating heat outwards or increasing the condensation surface area inside the furnace. The second auxiliary furnace 13 has a lower ambient temperature within its cavity in the hot air device 1. Introducing the second auxiliary furnace 13 into the system allows for the condensation of water vapor or water vapor in the return gas, thereby improving the system's thermal energy utilization efficiency. The third heat exchanger 131 helps to control the temperature more effectively in the system and to better utilize waste heat.

[0093] Overall, the hot air device 1 of this embodiment of the invention includes multiple flue gas passages, heat exchangers, and auxiliary furnaces, aiming to achieve effective heating of the gas through condensation and heat exchange, and improve energy efficiency throughout the system. In practical applications, the hot air device 1 can be precisely controlled and monitored to ensure that all parts work together to achieve optimal system performance.

[0094] Optionally, at least one of the first heat exchanger 111, the second heat exchanger 121, and the third heat exchanger 131 is at least one of a plate heat exchanger, a finned heat exchanger, a spiral heat exchanger, and a shell-and-tube heat exchanger. A plate heat exchanger consists of a series of flat plates with channels between them, allowing heat exchange to occur through the surface of the plates. This structure helps increase the heat exchange surface area and improve heat exchange efficiency. A finned heat exchanger increases the surface area and improves heat exchange efficiency by adding fins to the surface of the pipes. Fins can take different shapes, such as flat fins and spiral fins. A spiral heat exchanger uses spiral pipes, achieving heat exchange between gases through multiple spiral channels. This structure has high heat exchange efficiency and a compact design, but requires a high-power ventilation device 14.

[0095] As at least one feasible approach, the first heat exchanger 111, the second heat exchanger 121, and the third heat exchanger 131 employ shell-and-tube heat exchangers. These heat exchangers consist of multiple circular tubes (such as seamless steel pipes) arranged within the furnace. The flue gas from the main furnace 11 directly heats the circular tubes, rapidly raising their temperature. Flue gas and water vapor in the first auxiliary furnace 12 mix to heat the circular tubes, while cooling gas flows within the tubes for heating. This design offers structural stability and high reliability. The selection of a suitable type of heat exchanger depends on the specific heat exchange requirements and application scenario.

[0096] In some embodiments, such as Figures 1-2 and Figures 5-6As shown, the cooling corridor includes a first cooling corridor 22, which is arranged on one side of the drying oven 2 in the width direction. The first cooling corridor 22 communicates with the middle and / or tail end of the drying chamber 21, and with the first and / or second layers of the drying chamber 21. The first cooling corridor 22 is also configured to communicate with the main furnace 11 and / or the first auxiliary furnace 12, for returning the cooled gas to the main furnace 11 and / or the first auxiliary furnace 12. The first cooling corridor 22 can cover one side of the entire drying oven 2, ensuring that the veneer wood at each layer can be uniformly returned with cooling gas carrying moisture. The communication with the main furnace 11 and / or the first auxiliary furnace 12 enables the reuse of the returned gas, improving the energy efficiency of the system.

[0097] In some embodiments, such as Figure 2 or Figure 6 As shown, the cooling corridor includes a second cooling corridor 23, which is arranged on the other side of the oven device 2 in the width direction. The second cooling corridor 23 is connected to the middle and / or tail end of the drying chamber 21. The second cooling corridor 23 is connected to the first and / or second layer of the drying chamber 21. The second cooling corridor 23 is also configured to be connected to the main furnace 11 and / or the first auxiliary furnace 12 for returning the cooled gas to the main furnace 11 and / or the first auxiliary furnace 12.

[0098] Similar to the first cooling corridor 22, the introduction of the second cooling corridor 23 expands the cooling coverage area, ensuring that the cooling gas carrying water vapor can be uniformly refluxed on all sides of the oven device 2 in the width direction. Communication with the main furnace 11 and / or the first auxiliary furnace 12 allows the cooled gas to be effectively utilized in the system, improving system energy efficiency. Since the second cooling corridor 23 is far from the main furnace 11, a dedicated communication channel is not required, or the ambient atmosphere within the hot air device 1 can be used for flow.

[0099] In some embodiments, the first cooling corridor 22 and / or the second cooling corridor 23 are disposed inside or outside the drying chamber 21. If the first cooling corridor 22 and / or the second cooling corridor 23 are disposed inside the drying chamber 21, they can be directly connected to the internal space of the drying oven 2. Alternatively, the cooling corridors can be disposed outside the drying chamber 21. This design involves an external connection between the cooling corridors and the drying chamber 21, allowing for gas exchange via suitable channels, interfaces, or fans. This approach allows for more flexible system design and operation, and avoids reducing the straight-through of the main drying chamber 21-A or increasing air resistance.

[0100] In some embodiments, such as Figure 5As shown, the first cooling corridor 22 and / or the second cooling corridor 23 have a stepped structure, with the upper step being shorter than the lower step. The upper step connects to the second layer of the drying chamber 21, with the connection point located at the middle of the upper step connection point in the length direction of the drying chamber 21, and is equipped with a ventilation fan. The lower step connects to the first layer of the drying chamber 21, with the connection point located at the tail end of the lower step connection point in the length direction of the drying chamber 21. According to thermodynamic laws, the hot air pressure is higher in the middle position of the main drying chamber 21-A. The design of the upper step connection point directs the internal hot air towards the cooling corridor, achieving a pressure relief effect. In addition, a ventilation fan is installed at the position connecting to the second layer of the drying chamber 21 (at the middle of the length direction of the drying chamber). The ventilation fan increases airflow, promotes the cooling effect, and ensures gas flow in the upper cooling area of ​​the drying chamber 21. This stepped structure design allows for cooling zones at different heights, which helps to accommodate multi-level material layouts and promotes gas flow through equipment such as ventilation fans, thereby improving the cooling effect.

[0101] Furthermore, in some embodiments, the first cooling corridor 22 is located on the side of the oven device 2 corresponding to the main furnace 11. The first cooling corridor 22 also includes a main reflux channel 221 and two first auxiliary furnace first inlet channels 222A. The main reflux channel 221 is connected to the air inlet end of the first heat exchanger 111 and / or the second heat exchanger 121. One of the first auxiliary furnace first inlet channels 222A is connected to the upper part of the first auxiliary furnace 12, and the other first auxiliary furnace first inlet channel 222A is connected to the lower part of the first auxiliary furnace 12.

[0102] like Figure 10 As shown, the main reflux channel 221 has a large cross-sectional area, such as a straight rectangular or other large channel structure, and is the main functional component for realizing gas reflux. The main reflux channel 221 is connected to the air inlet of the first heat exchanger 111 and the second heat exchanger 121, that is, the chamber or space environment where the main furnace 11 and the first auxiliary furnace 12 of the hot air device 1 are located.

[0103] In some embodiments, the second cooling corridor 23 is located on the side of the oven device 2 corresponding to the first auxiliary furnace 12. The second cooling corridor 23 also includes two second inlet channels 222B for the first auxiliary furnace, one of which connects to the upper part of the first auxiliary furnace 12, and the other connects to the lower part of the first auxiliary furnace 12. In this embodiment, two cooling corridors are provided, located on different sides of the oven device 2, corresponding to the main furnace 11 and the first auxiliary furnace 12 respectively. The main reflux channel 221 guides the cooled gas to the first heat exchanger 111 and / or the second heat exchanger 121 to achieve efficient utilization of thermal energy and reuse of circulating gas. The first inlet channel 222A and the second inlet channel 222B of the first auxiliary furnace are used to guide the cooled gas containing water vapor to different parts of the first auxiliary furnace 12, further regulating the temperature and gas flow in the first auxiliary furnace 12.

[0104] In some embodiments, such as Figure 8 and Figure 9 As shown, the first auxiliary furnace inlet channel 222A and the second auxiliary furnace inlet channel 222B are used to introduce cooled gas containing water vapor into the first auxiliary furnace 12. After mixing with the flue gas from the main furnace 11, the heat of the steam-like gas in the first auxiliary furnace 12 is more easily absorbed by the second heat exchanger 121 and used to heat the drying gas circulating outside the furnace. The design of the first auxiliary furnace inlet channel 222 (first auxiliary furnace inlet channel 222A and first auxiliary furnace inlet channel 222B) introduces gas containing water vapor and mixes it with the flue gas from the main furnace 11, promoting the formation of steam-like gas, thereby transferring heat more effectively and improving the thermal energy utilization efficiency of the system.

[0105] The function of the first auxiliary furnace inlet channel 222 is to introduce cooled gas into the first auxiliary furnace 12. After the moisture in the veneer wood evaporates, it mixes with the returning cooling gas. Inside the first auxiliary furnace 12, the introduced cooled gas mixes with the flue gas from the main furnace 11. This mixing helps to form a gas mixture containing water vapor, which has certain advantages for the subsequent heat transfer process. After the cooling gas mixes with the flue gas flowing through the main furnace 11, the cooling gas has a large amount of water vapor. When it encounters the hot flue gas flow, the water vapor condenses into clouds or water droplets, resulting in hot water droplets adhering to the circular tubes inside the first auxiliary furnace 12. This makes the first auxiliary furnace 12 present a steam or vapor state, maximizing the retention of heat energy in the first auxiliary furnace 12 and achieving heat energy recycling.

[0106] In some embodiments, such as Figure 8 and Figure 9As shown, a water storage tank 15 is provided at the bottom of the second auxiliary furnace 13. The water storage tank 15 is connected to the furnace interior of the second auxiliary furnace 13 and is used to collect condensate from the second auxiliary furnace 13. The water storage tank 15 is equipped with a drain pipe 151. Condensate is generated in the second auxiliary furnace 13 and flows into the water storage tank 15. The condensate is water formed by gas cooling during the heat exchange process of veneer wood. The main function of the water storage tank 15 is to collect the water condensed from the second auxiliary furnace 13 and store it for further treatment or utilization. The drain pipe 151 can be used to guide the condensate outside the system or to its treatment equipment.

[0107] Combination Figure 12 This further explains the drying principle of the drying equipment in the embodiments of the present invention.

[0108] The combustion heat and flue gas path design of the hot air device 1: fuel is burned in the main furnace 11, and the main heat is used to heat the first heat exchanger 111. The exhaust gas from the main furnace 11 also contains some heat, which is recovered and utilized by the first auxiliary furnace 12. The exhaust gas from the main furnace 11 is introduced into the first auxiliary furnace 12 and mixed with the reflux cooling gas to heat the second heat exchanger 121. The remaining flue gas is introduced into the second auxiliary furnace 13. At this time, the heat is reduced and there is no value for recovery and utilization. After the moisture is condensed, it can be directly discharged to the outside or treated as tail gas, carbon dioxide adsorption, etc.

[0109] The circulating gas path design of hot air device 1 and oven device 2: The heat exchangers of the main furnace 11 and the first auxiliary furnace 12 heat the gas and blow it to the oven device 2 using a fan. The air intake path of the oven device 2 is mainly from the main air inlet 21-1 into the main drying chamber 21-A (but not limited to this). After the veneer wood absorbs heat and cools, the cooling gas carries a large amount of water vapor and returns to the hot air device 1 from the cooling corridors on both sides. Most of the cooling gas circulates through the main return channel 221, and a small part of the cooling gas enters the first auxiliary furnace 12 through the first furnace inlet channel 222A of the first auxiliary furnace.

[0110] Water vapor condensation discharge path design: A small portion of the cooling gas enters the first auxiliary furnace 12 through the first inlet channel 222A of the first auxiliary furnace, creating a steam atmosphere, which helps the first auxiliary furnace 12 to more efficiently recover and utilize the residual heat of the exhaust gas from the main furnace 11, and then enters the second auxiliary furnace 13, which is finally used for exhaust and drainage.

[0111] In some embodiments, such as Figure 9 As shown, the upper middle part of the second auxiliary furnace 13 is provided with a pressure relief pipe or exhaust pipe 132, which is used to discharge or release the overpressure gas or waste gas accumulated in the system. The design of the pressure relief pipe or exhaust pipe 132 can help control the pressure in the system and prevent problems caused by excessive pressure.

[0112] In some embodiments, the main furnace 11 is any one of a gas furnace, an oil furnace, an electric furnace, a coal furnace, an industrial combustion furnace, or a biomass combustion furnace. The main furnace 11 in these embodiments can be configured in various ways, selecting different types of combustion furnaces to meet specific drying requirements. Each type of combustion furnace has its own advantages and applicable scenarios.

[0113] As at least one feasible approach, the main furnace 11 employs a biomass combustion furnace, utilizing waste materials from veneer wood production. Biomass combustion furnaces use renewable biomass resources as fuel, and compared to traditional fossil fuels, the carbon dioxide released during combustion is recycled, resulting in a smaller environmental impact. Utilizing waste materials from veneer wood production as fuel achieves effective resource recycling. This helps reduce waste volume and improve the overall efficiency of the production process. Using waste as fuel can reduce energy costs. Moreover, biomass fuels are generally relatively inexpensive, contributing to lower production costs. Employing biomass combustion furnaces, particularly waste wood, aligns with sustainability principles. Biomass combustion typically provides a stable heat output, offering reliable thermal support for the drying process.

[0114] In some embodiments, such as Figure 8 and Figure 9 As shown, the hot air unit 1 is equipped with a conveyor belt device 16 for feeding the main furnace 11. The main function of the conveyor belt device 16 is to transport wood, waste wood, or other biomass fuels to the main furnace 11 for combustion. Using the conveyor belt device 16 allows for partially or fully automated material feeding. This helps improve operational efficiency and reduce manual intervention. For systems employing biomass combustion furnaces, the conveyor belt device 16 effectively transports waste wood or other biomass fuels to the main furnace 11, helping to ensure energy supply.

[0115] In some embodiments, such as Figure 9 As shown, at least one outer wall of the main furnace 11 is provided with first heat dissipation fins 112 for dissipating the heat of the circulating gas participating in drying within the hot air device 1. As at least one possible implementation, the top of the main furnace 11 may be provided with first heat dissipation fins 112, which may have a sheet-like or fin-like structure, the purpose of which is to transfer the heat generated by the main furnace 11 to the circulating gas within the hot air device 1. In this way, the radiant heat from the main furnace 11 in areas other than the first heat exchanger can be effectively utilized, improving the system's energy efficiency.

[0116] In some embodiments, such as Figure 9As shown, the outer wall of the first flue gas passage 101 is provided with a second heat dissipation fin 101-1 to dissipate the heat of the circulating gas participating in drying within the hot air device 1. The first flue gas passage 101 can also be regarded as a heat exchanger, which can transfer the heat of the flue gas to the circulating gas within the hot air device 1, which helps to improve the utilization efficiency of thermal energy. One or more sets of first flue gas passages 101 can be provided.

[0117] The hot air device 1 in this embodiment of the invention achieves effective heat transfer and utilization by setting heat dissipation fins on the main furnace 11 and the flue gas passage, which helps to improve the energy efficiency of the entire system.

[0118] In some embodiments, such as Figure 9 As shown, the second flue gas passage 102 is equipped with an overflow fan 102-1, which makes it easier for the gas in the first auxiliary furnace 12 to enter the second auxiliary furnace 13. The overflow fan 102-1 is a device used to promote gas flow, reduce the resistance to gas flow, and allow the gas to enter the second auxiliary furnace 13 more smoothly. This helps to ensure that heat can be effectively transferred to the second auxiliary furnace 13, improving the efficiency of the entire system. Multiple sets of second flue gas passages 102 can be provided to accelerate the speed at which cooling gas enters the second auxiliary furnace 13. Optionally, the second flue gas passages 102 are arranged on one side or at the top of the second auxiliary furnace 13, which is not the first flue gas passage 101.

[0119] In some embodiments, such as Figure 8 As shown, the ventilation device 14 includes a blower 141 and a ventilator 142. The blower 141 has a higher power than the ventilator 142. The blower 141 is located on the air inlet side of the first heat exchanger 111 of the main furnace 11, and the ventilator 142 is located on the air inlet side of the second heat exchanger 121 of the first auxiliary furnace 12. The blower 141 has a larger power, which can enhance the ventilation effect before the flue gas of the main furnace 11 passes through the first heat exchanger 111, so as to ensure efficient heat transfer and allow more of the heating airflow from the first heat exchanger 111 of the main furnace 11 to enter the drying oven device 2. In this embodiment of the invention, the ventilation device 14 can use a high-temperature resistant fan, which can ensure that the ventilation device 14 operates safely and stably in high-temperature environments and meets the needs of practical applications.

[0120] In some embodiments, the interior of the main furnace 11 may be lined with refractory bricks, and includes a wood dust combustion material inlet and a blower. The blower may be a high-pressure blower, which pressurizes the gas and sends it into the furnace through a rotating impeller to provide sufficient oxygen for combustion and improve combustion efficiency.

[0121] In some embodiments, such as Figure 3 , Figure 7 and Figure 11As shown, the wood conveying device 3 includes a flexible transmission mechanism 31 and several wooden board baskets 32. The combination of the flexible transmission mechanism 31 and the wooden board baskets 32 enables efficient conveying and drying of the wood. The symmetrical arrangement and double-layer configuration of the flexible transmission mechanism 31 help improve the stability and heat transfer of the wood, and also saves equipment floor space, making it suitable for large-scale drying of veneer wood. The wooden board baskets 32 provide an efficient and compact arrangement for drying veneer wood.

[0122] Taking the up-and-down circular motion as an example, the flexible transmission mechanism 31 includes a transmission component 311 using belt drive or chain drive and a matching transmission wheel 312. The transmission component 311 is mounted on the transmission wheel 312 and extends along the length direction of the drying oven device 2. Two sets of the flexible transmission mechanism 31 are symmetrically arranged in the width direction of the drying oven device 2. The flexible transmission mechanism 31 is located at the middle position in the height direction of the drying oven device 2, so as to divide its main drying chamber 21-A into upper and lower layers.

[0123] The wood moves within the oven in a circular, up-and-down circulation pattern, with layers shifting and lifting on both sides to ensure that all parts of the wood come into contact with hot air, resulting in more even drying. During this circulation, the wood constantly moves closer to and further away from the air inlet of the main drying chamber 21-A, which helps the wood to be affected by different temperatures and humidity levels within the main drying chamber 21-A, thus achieving a more uniform drying effect.

[0124] The wooden basket 32 ​​includes a base 321 and a basket 322. The basket 322 has multiple slots for vertically inserting veneer wood. The bottom end of the base 321 is fixedly mounted on the transmission components 311 on both sides. The basket 322 is connected to the top end of the base 321 via a pin 323, allowing the basket 322 to remain horizontal under gravity. When multiple wooden baskets 32 are arranged, they are spaced apart. Optionally, the basket 322 can be fitted with 100 veneer wood pieces placed side by side. Reinforcing bars can be welded to different placement positions to avoid affecting air circulation.

[0125] The wood conveying device 3 and conveying method in this embodiment of the invention can maximize the use of heat energy in the oven to ensure that the wood is fully heated and achieves the expected drying effect. This also helps reduce moisture differences in the wood and improves the uniformity of drying. The wood basket 32 ​​can maximize the capacity of the basket 322 while ensuring a stable and uniform layout of the veneer wood in the oven. Welded steel bars help maintain the position of the wood boards while avoiding negative impacts on gas flow, thereby achieving a more efficient drying process.

[0126] In some embodiments, such as Figure 4 and Figure 11 As shown, the transmission component 311 is a double-row chain. The double-row chain provides a larger transmission area, allowing the chain to better distribute the load, thereby improving transmission efficiency. It is also suitable for large-scale drying of veneer wood, improving drying efficiency. The double-row chain structure is more stable during movement, less prone to swaying or deviating from the track, improving the system's stability and balance.

[0127] Furthermore, the double-row chains are divided and fixedly connected by fixedly installed baffles 313. The baffles 313 have protruding sections. The upright plates 314 are fixedly connected to the base 321 of the wooden basket 32. The baffles 313 are a structure between the double-row chains, used to fix the two chains together. The upright plates 314 are spaced apart on the double-row chains. The upright plates 314 can be integrally formed with the baffles 313 or welded together. The upright plates 314 may have multiple connecting holes to achieve a fixed connection with the base 321 of the wooden basket 32 ​​using threaded connectors. The arrangement of the connecting holes can be varied, such as using a more stable triangular distribution. Optionally, the base 321 of the wooden basket 32 ​​can also use a triangular structure.

[0128] Furthermore, such as Figure 4 As shown, the timber conveying device 3 also includes a corner guide 33, which is fixedly disposed on the outside of the transmission member 311 on the transmission wheel 312 to prevent the transmission member 311 from being driven upward by the baffle 313 with the upright plate 314, thus maintaining the stable operation of the timber conveying device 3. The corner guide 33 may have a certain arc or inclination angle.

[0129] In some embodiments, such as Figure 11 As shown, a vertical rod 324 extends downward from the top of the basket 322 of the wooden board basket 32. The vertical rod 324 is connected to the top of the base 321 by a pin 323. The length of the vertical rod 324 is configured such that the height of the center of gravity of the wooden board basket 32 ​​after bearing the wooden board is lower than the axis of the pin 323, so as to maintain the stability of the wooden board basket 32.

[0130] In some embodiments, such as Figure 4 As shown, the rotation drive of the transmission wheel 312 can be driven by an electric motor or a hydraulic motor. For example, a three-phase asynchronous motor and a reducer can be used. The motor is reduced in speed by the reducer, which drives the chain to rotate. The speed is relatively slow, thereby driving the wooden basket 32 ​​to rotate in a U-shape.

[0131] In addition, the timber conveying device 3 can also be equipped with a support frame made of quilted structure splicing to support the flexible transmission mechanism 31 and several wooden board baskets 32. The number of wooden board baskets 32 can be set to dozens (e.g., 22 or more). The mechanical support strength of the support frame and the flexible transmission mechanism 31 should meet the design requirements or leave a certain strength margin.

[0132] The workflow for drying a large number of single wood panels using the drying equipment in this embodiment of the invention is as follows:

[0133] 1) Loading veneer timber: Individual veneer boards can be inserted into the veneer basket 32 ​​manually or by a robotic arm. The insertion of individual veneer boards into the veneer basket 32 ​​can be done on the timber conveying device 3 or in the factory. The entire veneer basket 32 ​​can then be installed. The operation position for directly inserting timber or disassembling the veneer basket 32 ​​can be at the end of the drying chamber 21.

[0134] 2) Turn on the hot air device 1: After the veneer boards are loaded, the end of the drying chamber 21 can be closed, and waste wood can be added to the conveyor belt device 16 to achieve heating.

[0135] 3) The drying oven device 2 and the wood conveying device 3 start working, and a large number of single wood planks of the whole batch are dried in the drying equipment.

[0136] Compared to the 24-48 hours required for drying in existing drying rooms, the drying equipment in this embodiment of the invention can control the drying cycle of a single batch of wood boards (e.g., with a standard setting of moisture content below 10%) within seven or eight hours, greatly shortening the drying time; the number of people on duty can be reduced to one or two, saving manpower.

[0137] The high efficiency and energy saving of the drying equipment in this embodiment of the invention are attributed to its advanced drying technology and system design. Specifically, the drying equipment optimizes heat conduction and airflow to ensure that heat is transferred to the wood panels evenly and efficiently, while minimizing energy loss. Furthermore, the drying equipment in this embodiment of the invention can also employ an intelligent control system, which can precisely adjust parameters such as the type of wood panel, humidity inside the oven, and other parameters to achieve a rapid and accurate drying effect.

[0138] The drying equipment in the embodiments of the invention significantly improves production efficiency, reduces costs, and better meets market demands by shortening the drying cycle and saving manpower. Simultaneously, the substantial reduction in drying time also reduces the exposure time of the wood during the drying process, potentially helping to minimize wood deformation and quality loss.

[0139] In this invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with or in place of features of other embodiments.

[0140] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the embodiments of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-veneer wood drying equipment, characterized in that, The drying equipment includes: a hot air device (1), a drying oven device (2), and a wood conveying device (3); The hot air device (1) is used at least to generate heating gas and transmit the heating gas to the drying oven device (2) to realize hot air drying of veneer wood; the hot air device (1) includes a main furnace (11), a first auxiliary furnace (12), a second auxiliary furnace (13) and a ventilation device (14). The main furnace (11) is equipped with a first heat exchanger (111), and the first auxiliary furnace (12) is equipped with a second heat exchanger (121). The main furnace (11) and the first auxiliary furnace (12) are connected through a first flue gas passage (101) at their upper parts to realize the waste heat recovery of the flue gas from the main furnace (11) by the first auxiliary furnace (12). The second auxiliary furnace (13) is connected to the first auxiliary furnace (12) through a second flue gas passage (102) at its upper part to realize the condensation of water vapor in the return gas. The drying oven device (2) is arranged on one side of the hot air device (1) to provide a closed or non-closed space for drying wood; the drying oven device (2) includes a drying chamber (21) and at least one cooling corridor, and the cooling corridor is connected to the drying chamber (21) and the hot air device (1) to return the cooled gas to the hot air device (1). The cooling corridor includes a first cooling corridor (22) and a second cooling corridor (23); the first cooling corridor (22) and the second cooling corridor (23) are in a stepped structure, with the upper step being shorter than the lower step. The upper step is connected to the second layer of the drying box (21), and the lower step is connected to the first layer of the drying box (21). The first cooling corridor (22) is located on the side of the oven device (2) corresponding to the main furnace (11), and the first cooling corridor (22) also includes a main reflux channel (221) and a first auxiliary furnace inlet channel (222A); the second cooling corridor (23) is located on the side of the oven device (2) corresponding to the first auxiliary furnace (12), and the second cooling corridor (23) also includes a first auxiliary furnace second inlet channel (222B). The first auxiliary furnace first inlet channel (222A) and the first auxiliary furnace second inlet channel (222B) are used to introduce cooled gas containing water vapor into different parts of the first auxiliary furnace (12). After mixing with the flue gas of the main furnace (11), the heat of the steam gas in the first auxiliary furnace (12) is more easily absorbed by the second heat exchanger (121) and heated by the drying gas circulating outside the furnace. The wood conveying device (3) is arranged inside the oven device (2) and along the length of the oven device (2) for placing a number of the veneer woods. The wood conveying device (3) has at least two layers, and is used to convey the veneer woods so that they circulate within the oven device (2) until drying is completed.

2. The multi-veneer wood drying equipment according to claim 1, characterized in that, The cooling corridor is arranged at least on one side of the drying chamber (21).

3. The multi-veneer wood drying equipment according to claim 2, characterized in that, The drying chamber (21) is connected to the hot air device (1), and the drying chamber (21) is provided with an inclined plate (211), a top plate (212) and / or a bottom plate (213). The inclined plate (211) is located on the side of the drying chamber (21) facing the hot air device (1). The drying chamber (21) is provided with at least a main air inlet (21-1), a top air inlet (21-2) and / or a bottom air inlet (21-3) at the part of the inclined plate (211), which are respectively used to correspond to the main drying chamber (21-A), the top air inlet channel (21-B) and / or the bottom air inlet channel (21-C) where the veneer wood is located.

4. The multi-veneer wood drying equipment according to claim 3, characterized in that, The top plate (212) is arranged parallel to the top of the main drying chamber (21-A), the bottom plate (213) is arranged parallel to the bottom of the main drying chamber (21-A), and the inclined plate (211) is arranged at one end of the main drying chamber (21-A) facing the hot air device (1) and is inclined from top to bottom toward the side of the main drying chamber (21-A). At least one of the top plate (212), bottom plate (213) and inclined plate (211) is used to absorb and store heat, such that the top plate (212) radiates heat to the top, bottom or side of the veneer wood. The top air inlet channel (21-B) and / or the bottom air inlet channel (21-C) are designed as a sealed structure at non-air inlet locations, or are connected to the main drying chamber (21-A) at the end or middle of the top air inlet channel (21-B) and / or the bottom air inlet channel (21-C).

5. The multi-veneer wood drying equipment according to claim 2, characterized in that, The first heat exchanger (111) is arranged along the length of the oven device (2). The first heat exchanger (111) is used to realize the heat exchange between the inside and outside of the main furnace (11) to heat the gas. The second heat exchanger (121) is arranged along the length of the oven device (2). The second heat exchanger (121) is used to realize the heat exchange between the inside and outside of the first auxiliary furnace (12) to heat the gas. The ventilation device (14) is installed at a position corresponding to the positions of the first heat exchanger (111) and the second heat exchanger (121). The ventilation device (14) is arranged on the side of the main furnace (11) and the first auxiliary furnace (12) away from the oven device (2) to blow cooling gas toward the first heat exchanger (111) for heating, forming a heated airflow that then enters the oven device (2). Alternatively, the ventilation device (14) is arranged on the side of the main furnace (11) and the first auxiliary furnace (12) facing the oven device (2) to extract the gas heated by the first heat exchanger (111) and blow it toward the oven device (2).

6. The multi-veneer wood drying equipment according to claim 5, characterized in that, The second auxiliary furnace (13) is equipped with a third heat exchanger (131) for dissipating heat outward from the second auxiliary furnace (13) or increasing the condensation surface area inside the furnace; At least one of the first heat exchanger (111), the second heat exchanger (121) and the third heat exchanger (131) is at least one of the plate heat exchanger, the finned heat exchanger, the spiral heat exchanger and the shell and tube heat exchanger.

7. The multi-veneer wood drying equipment according to claim 5, characterized in that, The first cooling corridor (22) is arranged on one side of the oven assembly (2) in the width direction. The first cooling corridor (22) communicates with the middle and / or tail end of the drying chamber (21). The first cooling corridor (22) communicates with one and / or two layers of the drying chamber (21). The first cooling corridor (22) is also configured to communicate with the main furnace (11) and / or the first auxiliary furnace (12) for returning the cooled gas to the main furnace (11) and / or the first auxiliary furnace (12); and / or Alternatively, the second cooling corridor (23) is arranged on the other side of the oven device (2) in the width direction. The second cooling corridor (23) is connected to the middle and / or tail end of the drying box (21). The second cooling corridor (23) is connected to the first and / or second layer of the drying box (21). The second cooling corridor (23) is also configured to be connected to the main furnace (11) and / or the first auxiliary furnace (12) for returning the cooled gas to the main furnace (11) and / or the first auxiliary furnace (12).

8. The multi-veneer wood drying equipment according to claim 7, characterized in that, The first cooling corridor (22) and / or the second cooling corridor (23) are disposed inside or outside the drying chamber (21); and / or The upper step is connected to the drying chamber (21) at the middle of the upper step in the length direction of the drying chamber (21), and is equipped with a ventilation fan. The lower step is connected to the drying chamber (21) at the tail end of the lower step in the length direction of the drying chamber (21); and / or The main return channel (221) is connected to the air inlet of the first heat exchanger (111) and / or the second heat exchanger (121), wherein one of the first auxiliary furnace first inlet channels (222A) is connected to the upper part of the first auxiliary furnace (12), and the other first auxiliary furnace first inlet channel (222A) is connected to the lower part of the first auxiliary furnace (12); and / or One of the first auxiliary furnace second inlet channels (222 B) is connected to the upper part of the first auxiliary furnace (12), and the other of the first auxiliary furnace second inlet channels (222 B) is connected to the lower part of the first auxiliary furnace (12).

9. The multi-veneer wood drying equipment according to claim 6, characterized in that, The bottom of the second auxiliary furnace (13) is provided with a water storage tank (15), which is connected to the furnace interior of the second auxiliary furnace (13) for collecting condensate from the second auxiliary furnace (13). The water storage tank (15) is equipped with a drain pipe (151); and / or The second auxiliary furnace (13) is provided with a pressure relief pipe or exhaust pipe (132) in the upper middle part; and / or The main furnace (11) is any one of a gas furnace, oil furnace, electric furnace, coal furnace, industrial combustion furnace, or biomass combustion furnace; and / or The hot air device (1) is equipped with a conveyor belt device (16) for feeding the main furnace (11).

10. The multi-veneer wood drying equipment according to claim 6, characterized in that, At least one outer wall of the main furnace (11) is provided with first heat dissipation fins (112) for dissipating heat from the circulating gas involved in drying within the hot air device (1); and / or The outer wall of the first flue gas passage (101) is provided with a second heat dissipation fin (101-1) to dissipate the heat of the circulating gas participating in drying within the hot air device (1); and / or The second flue gas passage (102) is equipped with an overflow fan (102-1) to make it easier for the gas in the first auxiliary furnace (12) to enter the second auxiliary furnace (13); and / or The ventilation device (14) includes a blower (141) and a ventilator (142). The blower (141) has a larger power than the ventilator (142). The blower (141) is located on the air inlet side of the first heat exchanger (111) of the main furnace (11), and the ventilator (142) is located on the air inlet side of the second heat exchanger (121) of the first auxiliary furnace (12).

11. The multi-veneer wood drying equipment according to claim 1, characterized in that, The timber conveying device (3) includes: The flexible transmission mechanism (31) includes a transmission component (311) using belt drive or chain drive and a matching transmission wheel (312). The transmission component (311) is mounted on the transmission wheel (312) and extends along the length direction of the oven device (2). Two sets of the flexible transmission mechanism (31) are symmetrically arranged in the width direction of the oven device (2). The flexible transmission mechanism (31) is located in the middle position in the height direction of the oven device (2) to divide its main drying chamber (21-A) into upper and lower layers. Several wooden baskets (32) are provided, each basket (32) including a base (321) and a basket (322). The basket (322) has multiple slots for vertically inserting veneer wood. The bottom end of the base (321) is fixedly mounted on the transmission components (311) on both sides. The basket (322) is connected to the top end of the base (321) by a pin (323), so that the basket (322) can be kept horizontal by gravity. When multiple wooden baskets (32) are arranged, each wooden basket (32) is spaced apart.

12. The multi-veneer wood drying equipment according to claim 11, characterized in that, The transmission component (311) is a double-row chain. The double-row chains are divided and fixedly connected by a fixedly installed baffle (313). The baffle (313) has a raised upright plate (314). The upright plate (314) is fixedly connected to the base (321) of the wooden basket (32). The top of the basket (322) of the wooden board basket (32) extends downward with a vertical rod (324). The vertical rod (324) is connected to the top of the base (321) by a pin (323). The length of the vertical rod (324) is configured such that the height of the center of gravity of the wooden board basket (32) after bearing the wooden board is lower than the center of the pin (323). The timber conveying device (3) further includes: a corner guide (33), which is fixedly disposed on the outside of the transmission member (311) on the transmission wheel (312) to prevent the transmission member (311) from being driven to jump by the baffle (313) with the upright plate (314).

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