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The veneer dryer is mainly used for drying veneer and plywood, and it is an important machine for the production of plywood. Due to the high moisture content inside the freshly cut veneer, wood veneers usually need to be dried before being put into use, so that the wood is not prone to moisture, insects and other problems in the subsequent process. The main purpose of the plywood machinery is to reduce the moisture content of the veneer to meet the requirements, while reducing material loss. Dried materials are easy to transport and store. As natural drying technology is far from meeting the needs of production development, various mechanized veneer drying machine is becoming more and more important.
Roller and mesh belt veneer dryers are widely used in the leveling and drying of wood veneers, plywood.
It has the characteristics of high thermal efficiency and small heat loss. It can automatically collect materials, save labor, large drying output, small footprint, high drying strength, fuel saving, secondary use of hot air, increase heating speed, and the veneer is flat after drying. , the moisture content reaches the standard. Veneer dryer with an integral energy-saving hot air stove (note: the heat source can be selected by oneself), and coal and wood scraps can be used as fuel to quickly achieve the heat required for drying. Veneer drying machine can be customized on demand. Can effectively improve work efficiency and plywood product quality.
Wood drying equipment is an ideal plywood machinery for wood preservation, insect-proof, anti-corrosion, anti-oxidation, and moisture-proof. The drying result of this woodworking equipment also determines the production quality and production capacity of wood processing enterprises.
Veneer drying equipment has a good effect on drying logs. The characteristics of the roller veneer dryer are more obvious, mainly in several aspects:
Drying wood with a roller veneer dryer is more than ten times faster than drying it naturally. Moreover, the drying quality is good and the drying defects are few. When the wood is heated by high frequency, the temperature is uniform, and if the drying process is well controlled, the wood can be dried without internal cracks, surface cracks and end cracks, so that there will be no loss during the drying process of the wood . The correct drying process can greatly reduce the damage rate and save raw material resources.
The roller veneer dryer is suitable for all kinds of wood, not easy to dry and other materials. Wood that is difficult to dry or cannot be dried by other methods can be solved by high-frequency vacuum drying. In terms of size, the width of the roller veneer dryer can also be adjusted according to actual needs, which can realize the simultaneous drying of multiple boards.
The roller veneer dryer is not only excellent in high efficiency and modernization, but also energy-saving and environmentally friendly without excessive pollution. Both the high-frequency generator and the drying room have taken good safety protection measures and sealing measures. The working environment is improved and the labor intensity is reduced. The thermal conversion rate is high, the energy consumption is small, and the cost of drying is relatively low. Small footprint, effectively saving land resources.
Automatic roller veneer dryer plywood machinery are automatic operation, the drying process is simple, and the process is simple and easy to master. In addition, it can also realize single-unit automation and multi-unit control automation. The use and maintenance are relatively simple, and the stability has been effectively guaranteed.
Natural air drying does not require a lot of energy input and is an environmentally friendly drying method. However, because air drying cannot make the veneer meet the final moisture content standard of less than 12%, it takes a long time, occupies a large area, and the drying result is unstable. Factories with large output or high requirements on veneer quality usually choose artificial forced drying - veneer dryer.
During the process, other issues such as temperature, humidity, and time should be considered. There are strict regulations on each item, and exceeding the index will affect the quality of the board.
The wood is treated before entering the roller drying machine and can be stacked with varying degrees of humidity. Pre-sorting before drying is not a time-consuming operation. It can make the initial moisture content of the same batch of dried wood within a certain range, which is beneficial to the temperature operation during the drying process and the moisture content between the dried wood is uniform, and it is not easy to appear partly single. The board drying result is too dry, and some veneers do not meet the drying standard.
After the wood enters the interior of the machine, it is heated and evaporated, and the construction technology of high temperature and rapid drying is adopted. The processed board is not easy to crack and deform. In the production process, the temperature, humidity, time, etc. should be strictly controlled. The temperature must be kept at a constant temperature. The main factors that affect the quality are moisture, humidity, drying and shrinkage. If the moisture treatment is not qualified, cracks or deformation will occur, or even severe cracking.
The first stage is to increase the temperature of the board by heating, so that the moisture inside the wood evaporates. The moisture in the wood will evaporate into the air, and then the veneer dryer evaporates the moisture through heat;
The second stage is continuous heating, because the veneer has just come into contact with the heat generated by the machine, and the temperature cannot reach the purpose of drying, so continuous heating is required to quickly evaporate the moisture in the wood;
The third stage is to lower the temperature. When the temperature of the wood veneer reaches a certain level, the evaporation rate of the water in the veneer will decrease, because most of the water in the wood has not evaporated, and the remaining heat is enough to remove the remaining water in the wood.
The fourth stage is cooling, but if the moisture content of the veneer reaches the dry standard, it needs to be transported to the cooling room for cooling. Sufficient cooling time can make the veneer not easy to get damp due to seasonal environment and other factors.
The automatic plywood drying machinery consumes a lot of heat during use. In order to save money, when designing the veneer dryer drying line, it is necessary to reduce heat energy consumption and increase the output of the drying system, thereby effectively increasing the drying speed. How to reduce the heat energy consumption of veneer drying equipment?
The use of waste heat circulation improves the thermal efficiency of the veneer drying machine, but it should be noted that as the number of cycles increases, the moisture content also increases, and the efficiency will decrease but increase the drying time and cost. Therefore, there should be a waste heat cycle, generally in the percentage Between twenty and thirty.
In addition to waste heat circulation, indirect heat exchange equipment can also be used to recover heat at the outlet of the veneer drying equipment for secondary circulation, which can be realized only by supporting relevant equipment.
During the drying process, if the insulation work of the equipment is qualified, the heat loss can be effectively reduced. To ensure that the thickness of the insulation layer is reasonable and stable, and to achieve a relative balance, fans and induced draft fans are usually used in series, which can effectively avoid the decline in the thermal efficiency of the drying equipment.
The energy consumption of the veneer dryer is mainly composed of steam moisture and exhaust gas, and the proportion of exhaust gas is relatively large. Therefore, it is necessary to reasonably control the moisture content of the material and the temperature of the exhaust gas entering the cyclone separator.
Veneer drying equipment is an important plywood machinery for processing veneer materials. A good use method determines the production quality and production capacity of the processing enterprise, while controlling costs.
Moisture content refers to the proportion of water in wood. Generally speaking, solid wood furniture has higher requirements for wood moisture content. If the water content of solid wood furniture is high, the furniture itself is easy to deteriorate and have spots, which is not conducive to furniture. usage of. On the contrary, if the moisture content is low, it is easy to cause the board to break and so on. Therefore, it is necessary to keep the moisture content of the wood consistent with the moisture content of the air. But how do you stay consistent? This requires a veneer dryer.
As a special drying equipment, the veneer dryer has a strong drying function, and it passes a lot of heat. The wood can be dried to remove the moisture in the cells, and its size will not change.
The control of wood moisture content is a problem that people can't see and easily overlook when buying furniture, but it is directly related to whether the furniture will be deformed or cracked. If the veneer dryer is not good and the moisture content control is not in place, even if the furniture is beautiful in shape and fine in workmanship, it is difficult to ensure that the furniture will not be deformed and cracked. When the veneer is placed in a certain environment, its moisture content will tend to an equilibrium value for a long enough time. When the moisture content is higher than the equilibrium moisture content of the environment, the veneer will dehumidify and shrink, otherwise it will absorb moisture and expand. Drying should be proper, not as dry as possible.
During the use of the veneer dryer, failures may occur, mainly due to wear and tear, and need to be replaced with new ones. When the veneer dryer is in normal use, the lubricating oil should be replaced after the fan has been running for 72 hours to ensure the normal operation of the fan. During use, if the screw is found to be loose, it should be tightened in time, so as not to affect the normal use of the equipment. Check before turning on the power, especially check whether the parts are loose or the motor oil is insufficient.
Clean the dust collection box every day to remove all dust and keep it ventilated to achieve a better drying effect, add lubricating oil to the bearings to ensure a more stable operation, and avoid increased friction and affect the efficiency of use.
1. Don't put a lot of planks at one time
When using the veneer dryer for drying work, be careful not to place too many veneers at one time to save trouble. This situation will affect the drying effect of the veneer and cause damage to the equipment to a certain extent.
2. The placed planks are guaranteed to be even
In order to ensure a good drying effect of veneers, when placing wooden boards, it is recommended to place veneers with uniform thickness and consistent size, so as to ensure the drying quality of veneers.
3. Pay attention to the ventilation of the equipment
During the drying process, because the internal temperature of the equipment is high, attention should be paid to the heat dissipation of the equipment itself. For the drying effect and the long-term use of the equipment, when using, pay attention to keep the ventilation and heat dissipation of the equipment.
4. Daily maintenance and maintenance
When the equipment is not in use, it is necessary to clean the equipment, inspect and repair the parts of the equipment, and pay attention to the use of lubricating oil for maintenance of the parts and joints of the equipment. In the process of using the veneer dryer, attention should be paid to the use of electricity to avoid problems with the circuit or boards that will affect the use. The power supply voltage equipped with the equipment cannot exceed the rated voltage value.
Good equipment is inseparable from good maintenance and maintenance. Good daily maintenance of the veneer dryer protects the performance and service life of the equipment, reduces energy waste, and provides a safe working environment.
Heating medium | steam system/oil system |
Veneer thickness(mm) | >1.7 - 6 |
Veneer initial moisture content | 80% |
Veneer final moisture content | 10% |
Work layers | 4 |
Length of heating chamber(mm) | n×2000 |
Length of cooling chamber(mm) | m×2000 |
Drying capacity | 6 |
Steam consumption | 3800 kg / h |
1. Modular design, easy to install
Modular prefabricated construction with minimal on-site assembly. Bolt structure, welded structure are available.
2. Fine machining, long service life
1) Frame: high-quality special-shaped steel pipe truss and columns, with good rigidity, firm connection, simple structure and easy installation.
2) Roller bearings are high-quality high-purity electrochemical graphite bearings, which are wear-resistant and high-temperature resistant.
3) Graphite bearing: High-quality high-purity electrochemical graphite bearing, reliable material, reasonable formula, wear-resistant and high-temperature resistant, not easy to break and durable, and has a long service life.
4) Spray box: Variable cross-section shape, the hot air spray speed of each nozzle hole in the length direction is consistent, ensuring uniform final moisture content of the veneer.
5) Hot air blower: imported high-flow and high static pressure centrifugal fan, vertical structure, manganese steel impeller, non-ferrous metal fireproof friction ring, which can effectively avoid fire hazard inside the machine.
6) Thermal cycle system: Steel-aluminum composite rolled sheet heat pipe heater. The heat dissipation area per unit length of the heat pipe is large, and the thermal conductivity K=58 under the working wind speed. And the optimized structural design with low resistance ensures the technical characteristics of high efficiency and energy saving.
7) The heating chamber has strong airtightness and effective heat preservation. The insulated floor protects the foundation and prevents heat loss, efficient thermal energy.
The whole machine is made of high-quality cold-rolled thin steel plate, which is anti-rust and corrosion-resistant. The internal components of the equipment are all sprayed with red lead antirust primer or high temperature resistant silver powder paint, and the outer surface parts are sprayed with polyurethane wrinkle paint after installation.
3. Whole plant planning, installation guidance
The veneer dryer is mainly used for drying veneer and plywood, and it is an important machine for the production of plywood. Due to the high moisture content inside the freshly cut veneer, wood veneers usually need to be dried before being put into use, so that the wood is not prone to moisture, insects and other problems in the subsequent process. The main purpose of the plywood machinery is to reduce the moisture content of the veneer to meet the requirements, while reducing material loss. Dried materials are easy to transport and store. As natural drying technology is far from meeting the needs of production development, various mechanized veneer drying machine is becoming more and more important.
Roller and mesh belt veneer dryers are widely used in the leveling and drying of wood veneers, plywood.
It has the characteristics of high thermal efficiency and small heat loss. It can automatically collect materials, save labor, large drying output, small footprint, high drying strength, fuel saving, secondary use of hot air, increase heating speed, and the veneer is flat after drying. , the moisture content reaches the standard. Veneer dryer with an integral energy-saving hot air stove (note: the heat source can be selected by oneself), and coal and wood scraps can be used as fuel to quickly achieve the heat required for drying. Veneer drying machine can be customized on demand. Can effectively improve work efficiency and plywood product quality.
Wood drying equipment is an ideal plywood machinery for wood preservation, insect-proof, anti-corrosion, anti-oxidation, and moisture-proof. The drying result of this woodworking equipment also determines the production quality and production capacity of wood processing enterprises.
Veneer drying equipment has a good effect on drying logs. The characteristics of the roller veneer dryer are more obvious, mainly in several aspects:
Drying wood with a roller veneer dryer is more than ten times faster than drying it naturally. Moreover, the drying quality is good and the drying defects are few. When the wood is heated by high frequency, the temperature is uniform, and if the drying process is well controlled, the wood can be dried without internal cracks, surface cracks and end cracks, so that there will be no loss during the drying process of the wood . The correct drying process can greatly reduce the damage rate and save raw material resources.
The roller veneer dryer is suitable for all kinds of wood, not easy to dry and other materials. Wood that is difficult to dry or cannot be dried by other methods can be solved by high-frequency vacuum drying. In terms of size, the width of the roller veneer dryer can also be adjusted according to actual needs, which can realize the simultaneous drying of multiple boards.
The roller veneer dryer is not only excellent in high efficiency and modernization, but also energy-saving and environmentally friendly without excessive pollution. Both the high-frequency generator and the drying room have taken good safety protection measures and sealing measures. The working environment is improved and the labor intensity is reduced. The thermal conversion rate is high, the energy consumption is small, and the cost of drying is relatively low. Small footprint, effectively saving land resources.
Automatic roller veneer dryer plywood machinery are automatic operation, the drying process is simple, and the process is simple and easy to master. In addition, it can also realize single-unit automation and multi-unit control automation. The use and maintenance are relatively simple, and the stability has been effectively guaranteed.
Natural air drying does not require a lot of energy input and is an environmentally friendly drying method. However, because air drying cannot make the veneer meet the final moisture content standard of less than 12%, it takes a long time, occupies a large area, and the drying result is unstable. Factories with large output or high requirements on veneer quality usually choose artificial forced drying - veneer dryer.
During the process, other issues such as temperature, humidity, and time should be considered. There are strict regulations on each item, and exceeding the index will affect the quality of the board.
The wood is treated before entering the roller drying machine and can be stacked with varying degrees of humidity. Pre-sorting before drying is not a time-consuming operation. It can make the initial moisture content of the same batch of dried wood within a certain range, which is beneficial to the temperature operation during the drying process and the moisture content between the dried wood is uniform, and it is not easy to appear partly single. The board drying result is too dry, and some veneers do not meet the drying standard.
After the wood enters the interior of the machine, it is heated and evaporated, and the construction technology of high temperature and rapid drying is adopted. The processed board is not easy to crack and deform. In the production process, the temperature, humidity, time, etc. should be strictly controlled. The temperature must be kept at a constant temperature. The main factors that affect the quality are moisture, humidity, drying and shrinkage. If the moisture treatment is not qualified, cracks or deformation will occur, or even severe cracking.
The first stage is to increase the temperature of the board by heating, so that the moisture inside the wood evaporates. The moisture in the wood will evaporate into the air, and then the veneer dryer evaporates the moisture through heat;
The second stage is continuous heating, because the veneer has just come into contact with the heat generated by the machine, and the temperature cannot reach the purpose of drying, so continuous heating is required to quickly evaporate the moisture in the wood;
The third stage is to lower the temperature. When the temperature of the wood veneer reaches a certain level, the evaporation rate of the water in the veneer will decrease, because most of the water in the wood has not evaporated, and the remaining heat is enough to remove the remaining water in the wood.
The fourth stage is cooling, but if the moisture content of the veneer reaches the dry standard, it needs to be transported to the cooling room for cooling. Sufficient cooling time can make the veneer not easy to get damp due to seasonal environment and other factors.
The automatic plywood drying machinery consumes a lot of heat during use. In order to save money, when designing the veneer dryer drying line, it is necessary to reduce heat energy consumption and increase the output of the drying system, thereby effectively increasing the drying speed. How to reduce the heat energy consumption of veneer drying equipment?
The use of waste heat circulation improves the thermal efficiency of the veneer drying machine, but it should be noted that as the number of cycles increases, the moisture content also increases, and the efficiency will decrease but increase the drying time and cost. Therefore, there should be a waste heat cycle, generally in the percentage Between twenty and thirty.
In addition to waste heat circulation, indirect heat exchange equipment can also be used to recover heat at the outlet of the veneer drying equipment for secondary circulation, which can be realized only by supporting relevant equipment.
During the drying process, if the insulation work of the equipment is qualified, the heat loss can be effectively reduced. To ensure that the thickness of the insulation layer is reasonable and stable, and to achieve a relative balance, fans and induced draft fans are usually used in series, which can effectively avoid the decline in the thermal efficiency of the drying equipment.
The energy consumption of the veneer dryer is mainly composed of steam moisture and exhaust gas, and the proportion of exhaust gas is relatively large. Therefore, it is necessary to reasonably control the moisture content of the material and the temperature of the exhaust gas entering the cyclone separator.
Veneer drying equipment is an important plywood machinery for processing veneer materials. A good use method determines the production quality and production capacity of the processing enterprise, while controlling costs.
Moisture content refers to the proportion of water in wood. Generally speaking, solid wood furniture has higher requirements for wood moisture content. If the water content of solid wood furniture is high, the furniture itself is easy to deteriorate and have spots, which is not conducive to furniture. usage of. On the contrary, if the moisture content is low, it is easy to cause the board to break and so on. Therefore, it is necessary to keep the moisture content of the wood consistent with the moisture content of the air. But how do you stay consistent? This requires a veneer dryer.
As a special drying equipment, the veneer dryer has a strong drying function, and it passes a lot of heat. The wood can be dried to remove the moisture in the cells, and its size will not change.
The control of wood moisture content is a problem that people can't see and easily overlook when buying furniture, but it is directly related to whether the furniture will be deformed or cracked. If the veneer dryer is not good and the moisture content control is not in place, even if the furniture is beautiful in shape and fine in workmanship, it is difficult to ensure that the furniture will not be deformed and cracked. When the veneer is placed in a certain environment, its moisture content will tend to an equilibrium value for a long enough time. When the moisture content is higher than the equilibrium moisture content of the environment, the veneer will dehumidify and shrink, otherwise it will absorb moisture and expand. Drying should be proper, not as dry as possible.
During the use of the veneer dryer, failures may occur, mainly due to wear and tear, and need to be replaced with new ones. When the veneer dryer is in normal use, the lubricating oil should be replaced after the fan has been running for 72 hours to ensure the normal operation of the fan. During use, if the screw is found to be loose, it should be tightened in time, so as not to affect the normal use of the equipment. Check before turning on the power, especially check whether the parts are loose or the motor oil is insufficient.
Clean the dust collection box every day to remove all dust and keep it ventilated to achieve a better drying effect, add lubricating oil to the bearings to ensure a more stable operation, and avoid increased friction and affect the efficiency of use.
1. Don't put a lot of planks at one time
When using the veneer dryer for drying work, be careful not to place too many veneers at one time to save trouble. This situation will affect the drying effect of the veneer and cause damage to the equipment to a certain extent.
2. The placed planks are guaranteed to be even
In order to ensure a good drying effect of veneers, when placing wooden boards, it is recommended to place veneers with uniform thickness and consistent size, so as to ensure the drying quality of veneers.
3. Pay attention to the ventilation of the equipment
During the drying process, because the internal temperature of the equipment is high, attention should be paid to the heat dissipation of the equipment itself. For the drying effect and the long-term use of the equipment, when using, pay attention to keep the ventilation and heat dissipation of the equipment.
4. Daily maintenance and maintenance
When the equipment is not in use, it is necessary to clean the equipment, inspect and repair the parts of the equipment, and pay attention to the use of lubricating oil for maintenance of the parts and joints of the equipment. In the process of using the veneer dryer, attention should be paid to the use of electricity to avoid problems with the circuit or boards that will affect the use. The power supply voltage equipped with the equipment cannot exceed the rated voltage value.
Good equipment is inseparable from good maintenance and maintenance. Good daily maintenance of the veneer dryer protects the performance and service life of the equipment, reduces energy waste, and provides a safe working environment.
Heating medium | steam system/oil system |
Veneer thickness(mm) | >1.7 - 6 |
Veneer initial moisture content | 80% |
Veneer final moisture content | 10% |
Work layers | 4 |
Length of heating chamber(mm) | n×2000 |
Length of cooling chamber(mm) | m×2000 |
Drying capacity | 6 |
Steam consumption | 3800 kg / h |
1. Modular design, easy to install
Modular prefabricated construction with minimal on-site assembly. Bolt structure, welded structure are available.
2. Fine machining, long service life
1) Frame: high-quality special-shaped steel pipe truss and columns, with good rigidity, firm connection, simple structure and easy installation.
2) Roller bearings are high-quality high-purity electrochemical graphite bearings, which are wear-resistant and high-temperature resistant.
3) Graphite bearing: High-quality high-purity electrochemical graphite bearing, reliable material, reasonable formula, wear-resistant and high-temperature resistant, not easy to break and durable, and has a long service life.
4) Spray box: Variable cross-section shape, the hot air spray speed of each nozzle hole in the length direction is consistent, ensuring uniform final moisture content of the veneer.
5) Hot air blower: imported high-flow and high static pressure centrifugal fan, vertical structure, manganese steel impeller, non-ferrous metal fireproof friction ring, which can effectively avoid fire hazard inside the machine.
6) Thermal cycle system: Steel-aluminum composite rolled sheet heat pipe heater. The heat dissipation area per unit length of the heat pipe is large, and the thermal conductivity K=58 under the working wind speed. And the optimized structural design with low resistance ensures the technical characteristics of high efficiency and energy saving.
7) The heating chamber has strong airtightness and effective heat preservation. The insulated floor protects the foundation and prevents heat loss, efficient thermal energy.
The whole machine is made of high-quality cold-rolled thin steel plate, which is anti-rust and corrosion-resistant. The internal components of the equipment are all sprayed with red lead antirust primer or high temperature resistant silver powder paint, and the outer surface parts are sprayed with polyurethane wrinkle paint after installation.
3. Whole plant planning, installation guidance
