CN212123616U - Equipment for heating, drying and carbonizing wood by electric heating plate under negative pressure environment - Google Patents
Equipment for heating, drying and carbonizing wood by electric heating plate under negative pressure environment Download PDFInfo
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- CN212123616U CN212123616U CN201922500865.5U CN201922500865U CN212123616U CN 212123616 U CN212123616 U CN 212123616U CN 201922500865 U CN201922500865 U CN 201922500865U CN 212123616 U CN212123616 U CN 212123616U
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Abstract
The utility model relates to a device for heating, drying and carbonizing combined treatment of wood by an electric heating plate under negative pressure environment, which comprises a vacuum tank body, a vacuum acquisition device, an in-tank electric heating device, an electric control cabinet and a control device, it is characterized in that the vacuum tank body is also provided with a high-pressure fine water atomization humidifying device, the electric heating device in the vacuum tank body consists of a plurality of electric heating plates, when in use, the electric heating plates and the wood to be processed are alternately placed in parallel to form a stack, the electric heating plates on the uppermost layer and the electric heating plates on the lowermost layer of the stack are both provided with heat insulation layers, the top of the stack is provided with a hydraulic pressure device, the wood processing equipment of the utility model can realize one-time loading of the wood, the method can be used for carrying out wood drying, wood carbonization treatment or combined treatment of wood drying and carbonization in the same equipment, and can realize the wood drying and wood carbonization treatment with high efficiency, rapidness and high quality.
Description
Technical Field
The utility model relates to a can carry out drying alone or carbonization alone to timber under negative pressure environment to and equipment that dry and carbonization jointly handled belongs to timber drying and timber thermal treatment (carbonization) modified field.
Background
The wood is a green renewable biological material, has the characteristics of environmental protection and sustainable utilization, has beautiful patterns and colors, high strength, easy processing and the like, and is widely applied to the production of buildings and indoor wood products from ancient times to present.
Wood is a biological material, and moisture in the wood has obvious influence on physical, chemical and other properties of the wood. The wet wood is easy to crack, deform, decay, mildew and the like. Therefore, the wood used on the building and the wood products must be dried to reduce the moisture content of the wood to the equilibrium moisture content corresponding to the use environment, so that the quality of the wood products can be ensured in the use process, and the cracking or the deformation is avoided.
With the restriction of natural protection forests in China and all countries around the world, the utilization of artificial forests is increasingly expanded, and artificial fast-growing forests have the defects of small diameter grade, young woods, large growth stress and the like.
Wood carbonization is an effective method for solving cracking, deformation, weather resistance and insect damage resistance of wood. The carbonized wood has good dimensional stability, uniform color, poor water absorption, excellent heat insulation and complete removal of wood resin. The physical and chemical properties of the wood can be greatly improved through heat treatment (wood carbonization), the application range of the wood is expanded, the quality and the added value of the wood are improved, and the wood can be widely applied to indoor and outdoor wooden products, decoration and ornament.
The water content required when the wood is carbonized is low, usually about 5%, so that the wood must be dried before carbonization, otherwise the wood is seriously deformed and even generates internal cracking in the carbonization process. The prior carbonization equipment is basically not suitable for early-stage wood drying, the materials need to be dried in other drying equipment in the early stage before carbonization and then are transported into a carbonization kiln, and the carbonization equipment has the disadvantages of complex and complicated operation, labor and force waste and low production efficiency.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electric plate heating wood drying and carbonization combined treatment's equipment to realize that timber once only loads, both can carry out wood drying in same equipment, wood carbonization handles, perhaps wood drying and carbonization combined treatment, realization wood drying and wood carbonization that can be high-efficient, quick, high-quality handle.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an equipment that dry and carbonization combined treatment of electric plate heating timber under negative pressure environment, includes the vacuum tank body, vacuum acquisition device, jar interior electric heater unit, automatically controlled cabinet and controlling means, the vacuum tank body still is provided with high-pressure thin water atomization humidification device, and the internal electric heater unit of vacuum tank comprises a plurality of electric heating board, and during the use, the electric heating board is parallel with the timber of waiting to process and is put alternately and form the stack, and the stack the superiors and the electrical heating board of lower floor all are equipped with the insulating layer, and the stack top is equipped with hydraulic pressure device.
The utility model discloses the accessible improves with following scheme:
the electric heating plate is composed of a heat dissipation aluminum plate, a high-temperature resistant insulating material and an inner conductive heating body.
One end of the vacuum tank body is provided with an electric movable door which can be opened or closed; the wood processing equipment further comprises a material loading device, wherein the material loading device comprises an in-tank track, an out-tank moving track, a rail car and a vacuum sucker hoisting device, the vacuum sucker hoisting device is arranged above the out-tank moving track, and the rail car can continuously run on the in-tank track and the out-tank moving track.
The vacuum tank body is also provided with a drainage device, the drainage device comprises an electric drainage valve, a drainage box and a drainage pipeline, and the drainage pipeline is sequentially communicated with the interior of the vacuum tank body, the drainage box and the electric drainage valve.
A high-temperature-resistant weighing sensing device used for weighing the wood moisture content inspection plate in real time is arranged in the vacuum tank body; and a temperature and humidity sensing device is arranged in the vacuum tank body.
The vacuum tank body is further provided with a high-definition peeping device, and the high-definition peeping device is connected with an out-tank display device through a video cable.
The vacuum acquisition device comprises a vacuum pump and a condenser, the vacuum pump is connected to the vacuum tank body through a pipeline, and the condenser is arranged between the vacuum pump and the vacuum tank body.
The utility model has the advantages that:
1. can carry out wood drying or timber carbonization alone in same equipment, also can dry wet timber earlier, carry out carbonization immediately after the drying, a tractor serves several purposes has reduced the link of loading, unloading many times, and the energy saving reduces the processing time of drying and carbonization, improves the efficiency and the utilization ratio of equipment, reduces enterprise's equipment purchasing cost.
2. The oxygen content is extremely low under the negative pressure condition in the tank body, the wood is guaranteed not to be oxidized in the carbonization process and the carbonization process is safe and fireproof, in addition, the low vacuum is favorable for controlling the color of the wood, the uniformity of the color in the carbonization process is guaranteed, the carbonization is uniform, and the carbonization quality is excellent.
3. The electric heating plate is composed of a special radiating aluminum plate, a high-temperature-resistant insulating material and a special internal conductive heating body, so that the electric heating plate has the characteristics of excellent anti-seismic property, voltage resistance, high thermal conductivity, high mechanical strength resistance and the like, has a high heating speed which is about 6 times faster than that of the conventional hot oil or steam heating, can realize the rapid heating of wood, and accelerates the drying speed and the carbonization speed.
4. Heating uniformly. In the past, when the heat conducting oil or other heat media are used for heating the heating plate, the inlet temperature is high, the outlet temperature is low, so that the whole carbonized material is piled with the temperature difference of 4-6 ℃, and when the carbonized material is heated by the electric heating plate, all the electric heating plates are heated simultaneously, so that the temperature is uniform, and the temperature difference is small (within +/-1 ℃).
5. And (6) intelligently controlling temperature. Through set up a plurality of temperature and humidity sensing device in the vacuum tank body, can be to same material heap, same heat realize deciding the layer, decide the control of regional different temperatures, also can carry out the difference control of different temperatures simultaneously to the temperature of every electric heating board of different positions, level, consequently, can realize the carbonization treatment of timber different temperatures simultaneously in same equipment according to the carbonization needs, whole process is realized intelligent control by temperature and humidity sensing device and heating device.
6. The device can realize continuous vacuum heating plate drying. When the equipment is used as vacuum drying equipment, after the electric heating plate is heated to the drying temperature, the continuous heating and drying of the wood under the vacuum condition can be realized, the drying speed is high, the drying temperature is low, the drying stress and the moisture content gradient are small, and the drying quality is good.
7. And (5) performing rapid cooling and wood moisture control treatment on the high-pressure fine water atomization device. Spray into the atomizing fog of high-pressure thin water through high-pressure thin water atomizing device to the internal, can realize the timber carbonization in-process at the internal rapid cooling of jar, enable the timber moisture absorption of carbonization later stage simultaneously and regain moisture. In addition, when the wood is carbonized under the periodic high humidity condition, the carbonization effect of the wood can be stabilized, and the size change and the rebound of the wood can be effectively avoided.
8. The equipment is green and environment-friendly, and the heat efficiency is high. This equipment carries out the carbonization under the negative pressure condition, because of the internal vacuum state that is of vacuum tank, therefore effectively avoids heat-conduction, and the heat of electric heating board is mostly absorbed by timber, and the heat loss is minimum with current other methods, and the thermal efficiency is high, and various volatile gases that produce in the timber carbonization process are condensed and are collected at the evacuation in-process simultaneously, do not discharge to the atmosphere, so this equipment is green treatment facility.
9. And (3) automatically detecting the water content on line in the drying and carbonizing processes. The processing equipment is internally provided with the high-temperature-resistant weighing sensing device, so that the weight and the moisture content change condition of the moisture content inspection plate can be detected in real time in the wood drying and high-temperature carbonization processes, the process parameters can be adjusted in time, and the optimized wood drying and carbonization processing is realized.
10. Wood color and surface quality on-line observation and template comparison. The color change of the wood and the deformation and cracking of the surface can be observed and compared on line in real time through the high-definition sight glass and the display, and an effective direct reference basis is provided for the drying and carbonization treatment of the wood.
Drawings
FIG. 1 is a schematic side view of the wood-treating apparatus in the example.
FIG. 2 is a schematic sectional view of a vacuum tank according to an embodiment of the present invention.
Reference numerals: 1. an electrically operated movable door; 2. a vacuum tank body; 3. a hydraulic pressurizing device; 4. an electrical heating plate; 5. wood to be processed; 6. an intake valve; 7. a hoisting machine; 8. a vacuum chuck; 9. a high-definition peeping device; 10. a track is moved outside the tank; 11. an electric drain valve; 12. a liquid level meter; 13. a drain tank; 14. a water inlet valve; 15. a condenser; 16. a vacuum pump; 17. an in-tank track; 18. a rail car 19, a suction cup vacuum pump; 20. a temperature and humidity sensing device; 21. an electric control cabinet; 22. a high temperature resistant weighing sensing device; 23. a high-pressure water atomization humidifying device.
Detailed Description
As shown in attached figures 1 and 2, the equipment for heating, drying and carbonizing combined treatment of wood by an electric heating plate in a negative pressure environment comprises a vacuum tank body 2, a vacuum acquisition device, an in-tank electric heating device, an electric control cabinet 21 and a control device, wherein the vacuum tank body 2 is also provided with a high-pressure water-mist humidifying device 23.
The electric heating device in the vacuum tank body 2 consists of a plurality of electric heating plates 4, and the electric heating plates 4 consist of a heat dissipation aluminum plate, a high-temperature resistant insulating material and an inner conductive heating body. When the electric heating plate stacking device is used, the electric heating plates 4 and wood 5 to be processed are placed in parallel and alternately to form a stack, the uppermost layer and the lowermost layer of the stack are provided with heat insulation layers, and the top of the stack is provided with the hydraulic pressure device 3.
One end of the vacuum tank body 2 is provided with an electric movable door 1 which can be opened or closed; the wood processing equipment further comprises a material loading device, wherein the material loading device comprises an in-tank track 17, an out-tank moving track 10, a rail car 18 and a vacuum chuck lifting device, the vacuum chuck lifting device is arranged above the out-tank moving track 10, and the rail car 18 can continuously run on the in-tank track 17 and the out-tank moving track 10.
The vacuum chuck hoisting device comprises a hoisting machine 7, a chuck vacuum pump 19 and a vacuum chuck 8.
The vacuum tank body 2 is further provided with a drainage device, the drainage device comprises an electric drainage valve 11, a drainage box 13 and a drainage pipeline, and the drainage pipeline is sequentially communicated with the interior of the vacuum tank body 2, the drainage box 13 and the electric drainage valve 11. The water inlet valve 14 is arranged on the drainage pipeline, and the liquid level meter 12 is arranged on the drainage tank 13.
A high-temperature-resistant weighing sensing device 22 for weighing the wood moisture content inspection plate in real time is arranged in the vacuum tank body 2; and a temperature and humidity sensing device 20 is arranged in the vacuum tank body 2.
The vacuum tank body 2 is further provided with a high-definition peeping device 9, and the high-definition peeping device 9 is connected with an out-tank display device through a video cable.
The vacuum obtaining device comprises a vacuum pump 16 and a condenser 15, the vacuum pump 16 is connected to the vacuum tank 2 through a pipeline, and the condenser 15 is arranged between the vacuum pump 16 and the vacuum tank 2.
The vacuum tank 2 is also provided with an air inlet valve 6 for pressure relief.
The treatment method for treating the wood by adopting the electric hot plate heating wood drying and carbonizing combined treatment equipment comprises the following steps:
1) and material loading: the timber with uniform thickness and higher water content is orderly stacked between the multiple layers of electric heating plates 4 of the rail car 18 in a single layer or multiple layers, the loading sequence is that firstly, one layer of electric heating plate 4 and one layer of timber are placed on the heat insulation layer of the rail car 18 to be accumulated and pushed to reach the rated stacking height, the uppermost layer of the timber stack is the electric heating plate 4 and the heat insulation layer, after the timber is stacked, the water content detection plate is put on the high temperature resistant weighing sensing device 22 in the vacuum tank body 2 according to the program and the power line of the electric heating plate 4 of the water content detection plate is connected, after the operation is finished, the rail car 18 is pushed into the vacuum tank body 2, the power supply connector and the temperature and humidity sensor connecting wire connector of each electric heating plate 4 are respectively inserted into the corresponding sockets in the vacuum tank body 2 in sequence, and then the timber after being loaded and the electric heating plate 4 are, finally, closing the electric movable door 1;
2) and vacuumizing the tank body: closing all connecting valves of the vacuum tank body 2, starting the vacuum acquisition device, controlling the pressure in the vacuum tank body 2 to be 3.4-6.7 kPa or 100-20 Pa, and pumping out air and oxygen in the vacuum tank body 2, between the electric heating plate 4 and the wood and in the wood through the vacuum pump 16 to avoid oxidation reaction and fire hazard in the wood carbonization process;
3) and wood vacuum drying treatment: maintaining the pressure in the vacuum tank body 2 to be near 6.7kPa, starting an in-tank electric heating device, controlling the temperature rise speed to be 4-6 ℃/h, heating the wood, and heating and drying the wood by using a vacuum hot plate after the temperature of the wood rises to a boiling point corresponding to the pressure in the vacuum tank body 2; controlling the temperature of the wood to be higher than the boiling point corresponding to the pressure in the vacuum tank body 2 by 3-5 ℃ in the drying process, so that the water in the wood is in a boiling state and migrates to the outside of the wood under the action of the internal and external pressure difference, and the state is maintained until the water content of the wood is reduced to be near the fiber saturation point (30%); then, adjusting the pressure in the vacuum tank body 2 to 6.7kPa, controlling the temperature of the electric heating plate 4 to be 40-50 ℃, and accelerating the evaporation of the bound water in the wood; when the water content is reduced to 20%, maintaining the pressure in the vacuum tank body 2 to be 6.7kPa, and controlling the temperature of the electric heating plate 4 to be 45-60 ℃ until the water content of the wood is reduced to 10%; when the water content is below 10%, maintaining the pressure in the vacuum tank body 2 at 3.4kPa, controlling the temperature of the electric heating plate 4 at 65-75 ℃, increasing the temperature of the bound water in the wood and the pressure difference between the internal environment and the external environment, accelerating the drying of the bound water, and maintaining the state until the water content of the wood is reduced to about 5%; water drained from the interior of the wood in the drying process is distributed to the bottom of the vacuum tank body 2 and drained to the drainage box 13 through the connecting pipeline, and the drainage valve is automatically opened to drain the interior water after the volume of the interior of the drainage box 13 reaches a set volume;
4) and carbonizing and preheating treatment: when the moisture content of the wood in the drying vacuum tank body 2 is reduced to 3%, the equipment enters a carbonization preheating stage; reducing the pressure in the vacuum tank body 2 to 1.0-2.0 kPa, starting an electric heating plate 4 for electric heating, heating the wood at a speed of 10-15 ℃/h, and keeping the temperature for 2h after heating to 130 ℃;
5) and carbonizing and heating: keeping the pressure of the vacuum tank body 2 at 1.0-2.0 kPa, continuously opening the electric heating plate 4 to heat the wood, and heating the wood in the tank to 180-240 ℃ at the temperature rising speed of 20-30 ℃/h;
6) and carbonization treatment: keeping the pressure of the vacuum tank body 2 at 1.0-2.0 kPa, keeping the temperature of the wood at the set carbonization temperature, and keeping the carbonization time for 3-5 h; water removed from the interior of the wood in the carbonization process flows to the bottom of the vacuum tank body 2 and is discharged to the water discharge tank 13 through the connecting pipeline, and the electric water discharge valve 11 is automatically opened to discharge the internal water after the volume in the water discharge tank 13 reaches a set volume;
7) and cooling: after carbonization, stopping heating the electric heating plate 4, adjusting the pressure in the vacuum tank body 2 to 6.7-13.4 kPa, and increasing the spraying amount of high-pressure fine water into the vacuum tank body 2 by the high-pressure fine water atomization humidifying device 23 to reduce the temperature of the wood and the heat treatment tank;
8) and wood moisture absorption and moisture regain treatment: when the temperature of the wood in the vacuum tank body 2 is reduced to 130 ℃, adjusting the pressure in the vacuum tank body 2 to 13.4-20.1 kPa; when the temperature is reduced to 110 ℃, adjusting the pressure in the vacuum tank body 2 to 26.8-40.2 kPa; when the temperature is reduced to 100 ℃, adjusting the pressure in the vacuum tank body 2 to 53.6-60.3 kPa, in the adjusting stage, the carbonized wood is subjected to moisture absorption and remoistening through high-pressure atomized water all the time, and after the normal pressure is recovered, the high-pressure fine water atomization humidifying device 23 is continuously used for spraying high-pressure fine water for atomization, so that the moisture content of the wood is increased to about 5-6, and the temperature is reduced to 40 ℃;
9) and material unloading: gradually recovering the pressure in the vacuum tank body 2 to normal pressure, opening the electric movable door 1, moving the rail car 18 out of the vacuum tank body 2, lifting the electric heating plate 4 layer by layer, and unloading the wood.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement modes, and are all included in the scope of the present invention.
Claims (5)
1. The utility model provides an equipment that dry and carbonization combined treatment of electric plate heating timber under negative pressure environment, includes the vacuum tank body, vacuum acquisition device, jar interior electric heater unit, automatically controlled cabinet and controlling means, its characterized in that, the vacuum tank body still is provided with high-pressure thin water atomization humidification device, the internal electric heater unit of vacuum tank comprises a plurality of electric heating board, and during the use, the electric heating board is parallel with the timber of treating processing and is put alternately and form the stack, and the stack superiors and lower floor's electric heating board all are equipped with the insulating layer, and the stack top is equipped with hydraulic pressure device.
2. The combined drying and carbonizing apparatus with electric heating plate under negative pressure as claimed in claim 1, wherein the electric heating plate is composed of a heat dissipating aluminum plate, a high temperature resistant insulating material and an internal conductive heating element.
3. The combined drying and carbonizing apparatus with electric heating plates under negative pressure as claimed in claim 1, wherein one end of the vacuum tank is provided with an electric movable door capable of being opened or closed; the wood processing equipment further comprises a material loading device, wherein the material loading device comprises an in-tank track, an out-tank moving track, a rail car and a vacuum sucker hoisting device, the vacuum sucker hoisting device is arranged above the out-tank moving track, and the rail car can continuously run on the in-tank track and the out-tank moving track.
4. The apparatus for combined drying and carbonizing wood material by heating with electric heating plate under negative pressure as claimed in claim 1, wherein the vacuum tank is further provided with a water discharge device comprising an electric water discharge valve, a water discharge tank and a water discharge pipe, the water discharge pipe being in communication with the inside of the vacuum tank, the water discharge tank and the electric water discharge valve in sequence.
5. The combined drying and carbonizing apparatus with electric heating plates under negative pressure as claimed in claim 1, wherein a high temperature resistant weighing sensor for real-time weighing of the board for testing moisture content of wood is disposed in the vacuum tank; and a temperature and humidity sensing device is arranged in the vacuum tank body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922500865.5U CN212123616U (en) | 2019-12-31 | 2019-12-31 | Equipment for heating, drying and carbonizing wood by electric heating plate under negative pressure environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922500865.5U CN212123616U (en) | 2019-12-31 | 2019-12-31 | Equipment for heating, drying and carbonizing wood by electric heating plate under negative pressure environment |
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| CN212123616U true CN212123616U (en) | 2020-12-11 |
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| CN201922500865.5U Active CN212123616U (en) | 2019-12-31 | 2019-12-31 | Equipment for heating, drying and carbonizing wood by electric heating plate under negative pressure environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111015854A (en) * | 2019-12-31 | 2020-04-17 | 中山市东成家具有限公司 | Equipment and method for drying and carbonizing wood by heating with electric heating plate under negative pressure environment |
| CN116061278A (en) * | 2022-11-24 | 2023-05-05 | 湖北萨莱玛木结构工程有限公司 | Expansion and shrinkage control equipment of building wooden structure |
-
2019
- 2019-12-31 CN CN201922500865.5U patent/CN212123616U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111015854A (en) * | 2019-12-31 | 2020-04-17 | 中山市东成家具有限公司 | Equipment and method for drying and carbonizing wood by heating with electric heating plate under negative pressure environment |
| CN116061278A (en) * | 2022-11-24 | 2023-05-05 | 湖北萨莱玛木结构工程有限公司 | Expansion and shrinkage control equipment of building wooden structure |
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