Wood high-heat evaporation drying heat treatment equipment

Abstract

The utility model discloses wood high-heat evaporation-drying heat treatment equipment, which relates to the technical field of wood processing and comprises a square closed drying chamber enclosed by six side walls including front, back, left, right, upper and lower surfaces, an access port is formed in the front side wall of the drying chamber, an access door is installed on the access port, and a lock is arranged between the access door and the access port; except the front side wall, the other five side walls sequentially comprise an inner plate layer, a cooling layer, a heat preservation layer and an outer plate layer from inside to outside, and cooling pipes are evenly laid in the cooling layer and fixed to the inner plate layer; a cooling medium is introduced into the cooling pipe; and two ends of the cooling pipe extend out of any side wall and are connected with a medium circulating device. A cooling medium is circularly introduced into the cooling pipe through the medium circulating device, heat in the drying chamber is transferred to the cooling pipe through the inner plate layer, and then the heat is taken out through the cooling medium, so that forced cooling of the drying chamber is achieved, the cooling speed is increased, and the overall wood evaporation drying efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wood processing, and particularly relates to a high-temperature steam drying and heat treatment device for wood. Background Art

[0002] The wood drying technology is to stack the wood in a drying chamber and dry it by baking with charcoal or passing hot air; after the wood drying treatment, it is necessary to cool down the drying chamber. During cooling, the drying chamber needs to be kept sealed to avoid the entry of external air into the drying chamber, which may cause the wood to catch fire.

[0003] The existing cooling method is natural cooling. However, due to the good sealing effect of the drying chamber, the natural cooling time is relatively long, generally lasting more than 24 hours, resulting in a relatively low overall drying efficiency of the wood. Content of the Utility Model

[0004] The purpose of the utility model is to provide a high-temperature steam drying and heat treatment device for wood, which improves the cooling speed of the wood after drying treatment, thereby improving the overall drying efficiency of the wood.

[0005] To achieve the above purpose, the utility model provides a high-temperature steam drying and heat treatment device for wood, which includes a square sealed drying chamber surrounded by six side walls in the front, back, left, right, up, and down directions; an inlet and outlet are provided on the front side wall of the drying chamber, and a door is installed on the inlet and outlet, and a lock is provided between the door and the inlet and outlet; the other five side walls except the front side wall include an inner plate layer, a cooling layer, a heat insulation layer, and an outer plate layer from the inside to the outside in sequence. Cooling pipes are evenly laid in the cooling layer, and the cooling pipes are fixed on the inner plate layer; a cooling medium is introduced into the cooling pipes, and both ends of the cooling pipes extend out of any side wall and are connected with a medium circulation device.

[0006] After adopting the above structure, by providing a cooling layer on the side wall of the drying chamber, cooling pipes are evenly laid in the cooling layer, a cooling medium is introduced into the cooling pipes, and the cooling medium is circulated into the cooling pipes through the medium circulation device. The heat in the drying chamber is transferred to the cooling pipes through the inner plate layer, and then the heat is carried out by the cooling medium, thereby realizing the forced cooling of the drying chamber, improving the cooling speed, and further improving the overall drying efficiency of the wood.

[0007] To ensure the hot air circulation efficiency in the drying chamber, a partition is fixedly installed in the drying chamber. The partition divides the drying chamber into upper and lower chambers. An air outlet is provided between the left side of the partition and the left side wall, and an air inlet is provided between the right side of the partition and the right side wall; a fan is installed in the upper chamber, and the blowing direction of the fan is from the air inlet towards the air outlet direction; a heating pipe is provided on the side of the fan's air outlet direction.

[0008] To avoid the fan drive device being affected by the hot air, while increasing the service life of the long shaft and preventing the long shaft from being corroded due to long-term exposure to high-temperature and high-humidity environments, the fan includes an exhaust fan fixed on the upper surface of the partition board and a fan drive device for driving the exhaust fan to rotate. The fan drive device is fixed outside the drying chamber, and its output shaft is connected to the exhaust fan through a long shaft; a long shaft sleeve is fixed on the drying chamber, and the long shaft is rotatably installed inside the long shaft sleeve.

[0009] To divert the high-temperature air flow and avoid turbulence at the corner positions, arc-shaped corners are provided at the connection positions of the left and right side walls and the upper and lower side walls of the drying chamber.

[0010] To prevent fires and avoid wood cracking caused by inconsistent humidity inside and outside the wood during the wood drying process, a fire prevention and humidification device is also provided inside the drying chamber; the fire prevention and humidification device includes a spray pipe installed inside the drying chamber, one end of the spray pipe extends out of the drying chamber and is connected to a water supply system and a steam system through a three-way pipeline; spray heads are evenly arranged along the length direction of the spray pipe, and the spray heads face the wood stacking position inside the drying chamber.

[0011] To increase the spray coverage area, the spray pipe includes a top spray pipe arranged above the wood stacking position and side spray pipes arranged on the left and right side walls.

[0012] To exhaust the waste gas from the drying chamber, an exhaust port is provided above the drying chamber, and the exhaust port only allows air to be discharged from inside the drying chamber.

[0013] To prevent the waste gas from polluting the environment, an exhaust pipe is installed on the exhaust port, and the exhaust pipe is connected to the outside through a dust removal system.

[0014] To improve the functionality of the dust removal system and play the roles of dust removal and anti-backflow, the dust removal system includes a dust removal cylinder, an exhaust pipe is arranged at the top of the dust removal cylinder, and the exhaust pipe is inserted into the dust removal cylinder; water is filled in the dust removal cylinder, and the liquid level of the water is kept higher than the outlet height of the exhaust pipe.

[0015] To facilitate the input of wood, tracks are provided at the bottom of the drying chamber, and the tracks extend inward from the inlet and outlet.

[0016] After adopting the above technical solutions, the beneficial effects of the present utility model are:

[0017] The utility model relates to a high-temperature steam drying and heat treatment equipment for wood, which solves the technical problem in the prior art that after the wood is steam-dried, the cooling speed in the drying chamber is too slow, resulting in low overall steam-drying efficiency of the wood. The utility model realizes forced cooling of the drying chamber by arranging a cooling layer on the side wall of the drying chamber, evenly laying cooling pipes in the cooling layer, introducing a cooling medium into the cooling pipes, circulating the cooling medium into the cooling pipes through a medium circulation device, transferring the heat in the drying chamber to the cooling pipes through the inner plate layer, and then taking out the heat through the cooling medium, thereby improving the cooling speed and further improving the overall steam-drying efficiency of the wood. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a high-temperature steam drying and heat treatment equipment for wood according to the utility model;

[0019] Figure 2 is a schematic structural diagram of a lock;

[0020] Figure 3 is Figure 1 the internal structural diagram of

[0021] Figure 4 is Figure 3 the side sectional view of

[0022] Figure 5 is Figure 1 the structural diagram of the rear side of

[0023] Figure 6 is the structural diagram of a dust removal system.

[0024] In the figure, 1 is the front side side wall, 11 is the inlet and outlet, 12 is the access door, 13 is the lock, 131 is the rotating shaft, 132 is the threaded column, 133 is the hand wheel, 134 is the U-shaped groove plate, 2 is the left side side wall, 21 is the inner plate layer, 22 is the cooling layer, 221 is the cooling pipe, 23 is the heat insulation layer, 24 is the outer plate layer, 25 is the arc-shaped corner, 3 is the partition board, 31 is the air outlet, 32 is the air inlet, 4 is the fan, 41 is the exhaust fan, 42 is the fan driving device, 421 is the long shaft, 43 is the long shaft sleeve, 5 is the heating pipe, 61 is the spray pipe, 611 is the spray head, 71 is the exhaust port, 72 is the exhaust pipe, 73 is the dust removal system, 731 is the dust removal cylinder, 732 is the air outlet pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following further elaborates the utility model in conjunction with the drawings.

[0026] All orientations mentioned in this specification are based on the orientation when a high-temperature steam drying and heat treatment equipment for wood according to the utility model is working properly, without limiting its orientation during storage and transportation, only representing the relative positional relationship, not the absolute positional relationship.

[0027] As shown Figure 1 in the figure, a high-temperature steam drying and heat treatment device for wood includes a square drying chamber surrounded by six side walls in the front, back, left, right, up, and down directions; an inlet and outlet 11 is provided on the front side wall 1 of the drying chamber, and a door 12 is installed on the inlet and outlet 11. The door 12 can be installed in an upward-opening or side-opening manner. In this embodiment, for the convenience of opening the door, the door 12 is installed in a side-opening manner. The specific installation method is as follows: the door 12 is hinged to one side of the inlet and outlet 11 through a hinge, and a lock 13 is provided between the door 12 and the inlet and outlet 11. A track is provided at the bottom of the drying chamber, and the track extends horizontally inward from the inlet and outlet 11.

[0028] As shown Figure 1 in and Figure 2 jointly, the lock 13 can adopt the structure in the prior art. In this embodiment, the lock 13 includes a rotating shaft 131 vertically installed on the side of the inlet and outlet 11 opposite to the hinge. A threaded column 132 is fixed on the rotating shaft 131, and a handwheel 133 is screwed on the top of the threaded column 132. A U-shaped groove plate 134 is provided on the side of the door 12 opposite to the hinged side. The opening of the U-shaped groove of the U-shaped groove plate 134 faces the direction of the threaded column 132, and the threaded column 132 is inserted into the U-shaped groove, and the handwheel 133 is pressed on the U-shaped groove plate 134. In order to achieve stable force, two locks 13 are provided up and down.

[0029] When it is necessary to open the door 12, rotate the handwheel 133 to loosen the U-shaped groove plate 134, pull the handwheel 133 outward, the rotating shaft 131 rotates, the threaded column 132 rotates outward, disengages from the U-shaped groove, and the door 12 can be opened; operate in the reverse direction, and the door 12 can be closed.

[0030] As shown Figure 3 in the figure, among the other five side walls except the front side wall 1, they are the rear side wall, the left side wall 2, the right side wall, the upper side wall, and the lower side wall respectively, and their structures are the same from the inside to the outside. Therefore, only the left side wall 2 will be taken as an example for detailed description below.

[0031] The left side wall 2 includes an inner plate layer 21, a cooling layer 22, an insulation layer 23 and an outer plate layer 24 from the inside to the outside. The inner plate layer 21 and the outer plate layer 24 are made of stainless steel plates, which play a role in protecting the inside of the side wall. Cooling pipes 221 are evenly laid in the cooling layer 22, and the cooling pipes 221 are fixed on the inner plate layer 21. The cooling pipes 221 are stainless steel cooling pipes. The cooling medium is passed through the cooling pipes 221, and both ends of the cooling pipes extend out of either side wall and are connected to a medium circulation device. The cooling medium can be water or air; if the cooling medium is water, the medium circulation device is an industrial refrigeration circulating chiller; if the cooling medium is air, the medium circulation device is a high-pressure vortex fan. The insulation layer 23 can be made of rock wool or other thermal insulation and flame retardant materials to achieve thermal insulation effects.

[0032] When the wood is evaporated and dried and the drying chamber needs to be cooled, the cooling medium is circulated into the cooling pipe 221 through the medium circulation device, and the heat in the drying chamber is transferred to the cooling pipe 221 through the inner plate layer 21, and then the heat is taken out of the drying chamber by the cooling medium, thereby achieving forced cooling of the drying chamber, improving the cooling speed, and ensuring the overall drying efficiency of the wood.

[0033] like Figure 3 and Figure 4 As shown in common, a partition 3 is fixedly installed in the drying chamber, and the partition 3 divides the drying chamber into two upper and lower chambers. An air outlet 31 is arranged between the left side of the partition 3 and the left side wall 2; an air inlet 32 ​​is arranged between the right side of the partition 3 and the right side wall; the upper chamber, the air outlet 31, the lower chamber and the air inlet 32 ​​constitute a circulation duct for the airflow.

[0034] A fan 4 is installed in the upper chamber, and the blowing direction of the fan 4 is from the air inlet 32 ​​to the air outlet 31; a heating pipe 5 is arranged on one side of the air outlet direction of the fan 4; the fan 4 can control the airflow in the drying chamber to circulate along the circulating air duct; the heating pipe 5 plays a role in heating the passing airflow. The heating pipe 5 can be an electric heating pipe or a graphene heating pipe.

[0035] The fan 4 includes an exhaust fan 41 fixed on the upper surface of the partition 3 and a fan driving device 42 for driving the exhaust fan 41 to rotate. The fan driving device 42 is a motor, which is fixed on the outside of the drying chamber. The output shaft of the motor is connected with a long shaft 421. Because the air in the drying chamber is in a high temperature and high humidity state, the long shaft 421 is exposed to such air for a long time, which is easy to cause corrosion; and the transmission shaft is expensive. In order to effectively protect the long shaft 421, an axial hole for the long shaft 421 to penetrate is opened on the drying chamber. A long shaft sleeve 43 is fixed in the axial hole. The long shaft 421 is rotatably installed in the long shaft sleeve 43, and one end of the long shaft 421 passing through the long shaft sleeve 43 is connected to the exhaust fan 41. The long shaft sleeve 43 wraps the long shaft 421, so that the long shaft sleeve 43 effectively protects the long shaft 421.

[0036] The blower 4 blows air towards the heating pipe 5. The air becomes high-temperature air after passing through the heating pipe 5, and then flows downward from the air outlet 31. The high-temperature air dries the wood in the lower chamber and then returns to the upper chamber from the air inlet 32 to participate in the cycle again. The inner circulation of air is realized through the circulation air duct, which improves the circulation efficiency of the high-temperature air and ensures the drying efficiency and effect.

[0037] To ensure the circulation effect of the hot air, multiple groups of blowers 4 are evenly arranged along the length direction of the drying chamber. In this embodiment, three groups are provided, and in actual application, other numbers of blowers can be set according to needs, and this embodiment does not limit this.

[0038] To avoid the formation of turbulence at the corner positions during the air flow, which affects its flow efficiency, arc-shaped corners 25 are provided at the connection positions of the left and right side walls and the upper and lower side walls. The arc-shaped corners 25 play a role in guiding the air flow.

[0039] Furthermore, during the wood drying process, two situations will occur. One situation is that the drying speed of the wood is too fast, resulting in the outer surface of the wood being dry while the water content inside is still very high, thus causing cracks on the wood surface; the other situation is that during the high-temperature drying process, the wood is prone to burning due to equipment or environmental factors.

[0040] To solve the above two situations, a fire prevention and humidification device is also provided in the drying chamber; the fire prevention and humidification device includes a spray pipe 61 installed in the drying chamber. One end of the spray pipe 61 extends out of the drying chamber and is connected to a water supply system and a steam system through a three-way pipeline; the water supply system provides spray water for the spray pipe 61, and the steam system provides steam for the spray pipe 61. Spray heads 611 are evenly arranged along the length direction of the spray pipe 61, and the spray heads 611 face the wood stacking position A in the drying chamber.

[0041] To increase the coverage area of the spray heads 611, the spray pipe 61 includes a top spray pipe 61 arranged at the bottom of the partition 3 and side spray pipes 61 arranged on the left and right side walls.

[0042] When the humidity monitoring device in the drying chamber detects that the humidity is lower than the normal value, steam is provided to the spray pipe 61 through the steam system, and the steam is sprayed onto the wood surface through the spray heads 611 to supplement moisture to the wood surface, thereby avoiding excessive differences in the moisture content of the wood and causing cracks.

[0043] When the wood catches fire, spray water is provided to the spray pipe 61 through the water supply system, and the spray water is sprayed onto the wood surface through the spray heads 611 to extinguish the fire and prevent a fire from occurring.

[0044] Such as Figure 4 、Figure 5 and Figure 6 As shown jointly by Figure 5 and Figure 6 , during the process of drying the wood until it is completely dry, after the internal moisture is evaporated, it needs to be discharged from the drying chamber. Therefore, an exhaust port 71 is provided above the drying chamber, and the exhaust port 71 only allows air to be discharged from the drying chamber. The gas discharged from the exhaust port 71 contains dust, water vapor or other partial impurities. In order to avoid directly discharging it into the air and causing pollution, an exhaust pipe 72 is installed on the exhaust port 71, and the exhaust pipe 72 is connected to the outside through a dust removal system 73.

[0045] The dust removal system 73 can adopt a water film dust collector. In this embodiment, the dust removal system includes a dust removal cylinder 731. An air outlet pipe 732 is provided at the top of the dust removal cylinder 731, and the exhaust pipe 72 is inserted into the dust removal cylinder 731. Water is filled in the dust removal cylinder 731, and the liquid level of the water is maintained higher than the air outlet height of the exhaust pipe 72. The gas discharged from the exhaust pipe 72 enters the water. After being absorbed by the water, part of the impurities are adsorbed, and then it is discharged through the air outlet pipe 732. This structure not only achieves the dust removal effect but also avoids the backflow of the outside air and plays the role of a one-way valve.

[0046] A high-temperature drying and heat treatment device for wood of the present utility model solves the technical problem in the prior art that after the wood is dried until it is completely dry, the cooling speed in the drying chamber is too slow, resulting in low overall drying efficiency of the wood. The present utility model realizes forced cooling of the drying chamber by providing a cooling layer on the side wall of the drying chamber, and cooling pipes are evenly laid in the cooling layer. A cooling medium is introduced into the cooling pipes, and the cooling medium is circulated into the cooling pipes through a medium circulation device. The heat in the drying chamber is transferred to the cooling pipes through the inner plate layer, and then the heat is carried out by the cooling medium, thereby improving the cooling speed and further improving the overall drying efficiency of the wood.

[0047] Certainly, the above description is not a limitation to the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the substantial scope of the present utility model should also belong to the protection scope of the present utility model.

Claims

1. A high-temperature steam drying and heat treatment equipment for wood, characterized in that: It includes a square closed drying room surrounded by six side walls including front, back, left, right, top and bottom; An entrance and an exit are arranged on the front side wall of the drying chamber, an entrance and an exit door are installed on the entrance and an entrance and an exit door are arranged between the entrance and the exit door and a lock; The other five side walls except the front side wall include an inner plate layer, a cooling layer, an insulation layer and an outer plate layer from the inside to the outside. Cooling pipes are evenly laid in the cooling layer and fixed on the inner plate layer. Cooling medium is passed through the cooling pipes and both ends of the cooling pipes extend out of any of the side walls and are connected to a medium circulation device.

2. The high-temperature steam drying and heat treatment equipment for wood according to claim 1, wherein: A partition is fixedly installed in the drying chamber, the partition divides the drying chamber into two upper and lower chambers, an air outlet is arranged between the left side of the partition and the left side wall, and an air inlet is arranged between the right side of the partition and the right side wall; A fan is installed in the upper chamber, and the blowing direction of the fan is from the air inlet toward the air outlet; a heating pipe is arranged on one side of the air outlet direction of the fan.

3. The high-temperature steam drying and heat treatment equipment for wood according to claim 2, wherein: The fan comprises an exhaust fan fixed on the upper surface of the partition and a fan driving device for driving the exhaust fan to rotate, wherein the fan driving device is fixed on the outside of the drying chamber, and an output shaft thereof is connected to the exhaust fan through a long shaft transmission; A long shaft sleeve is fixed on the drying chamber, and the long shaft is rotatably installed in the long shaft sleeve.

4. A high-temperature steam drying and heat treatment equipment for wood according to claim 1, characterized in that: Arc corners are arranged at the connection positions between the left and right side walls and the upper and lower side walls of the drying chamber.

5. The wood high-temperature steam drying and heat treatment equipment according to claim 2, characterized in that: The drying chamber is also provided with a fireproof humidifying device; the fireproof humidifying device comprises a spray pipe installed in the drying chamber, one end of which extends out of the drying chamber and is connected to a water supply system and a steam system through a three-way pipe; spray heads are evenly arranged along the length direction of the spray pipe, and the spray heads face the wood stacking position in the drying chamber.

6. The wood high-temperature steam drying and heat treatment equipment according to claim 5, characterized in that: The spray pipe comprises a top spray pipe arranged above the wood stacking position and side spray pipes arranged on the left and right side walls.

7. A high-temperature steam drying and heat treatment equipment for wood according to claim 1, characterized in that: An exhaust port is arranged above the drying chamber, and the exhaust port only allows air to be exhausted from the drying chamber.

8. The high-temperature steam drying and heat treatment equipment for wood according to claim 7, wherein: An exhaust pipe is installed on the exhaust port, and the exhaust pipe is connected to the outside world through a dust removal system.

9. A high-temperature steam drying and heat treatment device for wood according to claim 8, characterized in that: The dust removal system comprises a dust removal cylinder, the top of which is provided with an exhaust pipe, which is inserted into the dust removal cylinder; the dust removal cylinder is filled with water, and the water level is kept higher than the exhaust height of the exhaust pipe.

10. A high-temperature steam drying and heat treatment equipment for wood according to claim 1, characterized in that: A track is disposed at the bottom of the drying chamber, and the track extends inwardly from the inlet and outlet.

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