CN216868948U - Wood shaving drying production line with tail gas waste heat pre-drying device - Google Patents
Wood shaving drying production line with tail gas waste heat pre-drying device Download PDFInfo
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- CN216868948U CN216868948U CN202220657670.0U CN202220657670U CN216868948U CN 216868948 U CN216868948 U CN 216868948U CN 202220657670 U CN202220657670 U CN 202220657670U CN 216868948 U CN216868948 U CN 216868948U
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- wood
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- 238000001035 drying Methods 0.000 title claims abstract description 153
- 239000002023 wood Substances 0.000 title claims abstract description 92
- 239000007789 gas Substances 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 239000002918 waste heat Substances 0.000 title claims abstract description 20
- 238000007599 discharging Methods 0.000 claims abstract description 15
- 239000000428 dust Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000000446 fuel Substances 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 238000012216 screening Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 210000002268 wool Anatomy 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 244000166124 Eucalyptus globulus Species 0.000 description 1
- 240000006240 Linum usitatissimum Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 241000219000 Populus Species 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
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- Drying Of Solid Materials (AREA)
Abstract
The utility model discloses a wood shaving drying production line with a tail gas waste heat pre-drying device, and belongs to the field of shaving board production. The wood shaving drying device mainly comprises a material conveyor, a first elevator, wood shaving drying equipment and a dust remover and further comprises a pre-drying device, the material conveyor is connected with a first feeding port of the pre-drying device through a second elevator, a discharging port of the pre-drying device is connected with a second feeding port of the wood shaving drying equipment through the first elevator, a tail gas outlet of a boiler in the wood shaving drying equipment is connected with an air inlet of the pre-drying device through the first fan, and an air outlet of the pre-drying device is connected with the dust remover through the second fan. The utility model adds the pre-drying device, recycles the tail gas generated by the boiler in the original wood shaving drying production line, pre-dries the wet wood shavings by utilizing the waste heat of the tail gas, reduces the water content of the wet wood shavings, relieves the drying pressure of wood shavings drying equipment, and saves the fuel and electric energy consumption of the boiler. The utility model is mainly used for drying wood shavings.
Description
Technical Field
The utility model belongs to the field of shaving board production, and particularly relates to a shaving drying production line with a tail gas waste heat pre-drying device.
Background
The particle board is an artificial board made up by using wood particles (wood shavings, wood chips and saw dust, etc. of poplar, eucalyptus and miscellaneous wood) or non-wood plant particles (flax chips, bagasse and wheat straw) through the processes of drying, mixing with adhesive material and pressing under a certain temp. and pressure.
Wood wool drying equipment is one of key equipment in wood wool drying production line, and because the board-making raw materials are different, influenced by factors such as season, storage place, storage time, etc., the wet wood wool moisture content behind the shavings is very high and the difference is great. In order to ensure the stable quality of the shaving board product and improve the productivity, wet shavings are dried and are required to reach the process specification and uniform water content before being processed.
The existing wood shaving drying production line mainly comprises a screening mechanism, a material conveyor, a lifter, wood shaving drying equipment and a dust remover which are sequentially connected, wherein the wood shaving drying equipment takes high-temperature flue gas generated by a boiler as a drying heat medium, a fan provides conveying power for wood shavings and the flue gas, and wet wood shavings are separated by a cyclone separator or discharged by a blanking box after being dried by the drying equipment. The tail gas generated by the boiler contains a large amount of waste heat, the tail gas of the boiler is directly discharged after being dedusted by the bag-type deduster by the conventional wood shaving drying equipment, the bag needs to be irregularly cleaned due to large discharge amount, and the cleaned sewage is discharged after being treated again, so that the sewage treatment cost is high, a large amount of human resources are wasted, and simultaneously the waste heat in the tail gas is also wasted greatly.
Disclosure of Invention
The technical problem to be solved by the utility model is as follows: overcome prior art's not enough, provide a wood shavings drying production line with tail gas waste heat is drying device in advance, it is before wood shavings formal drying, add drying device in advance, with the tail gas recovery of boiler production among the drying production line of former wood shavings recycle, utilize the tail gas waste heat to carry out predrying to wet wood shavings, reduced the water content of wet wood shavings, alleviate wood shavings drying equipment's drying pressure to boiler fuel and power consumption have been saved.
The wood shaving drying production line with the tail gas waste heat pre-drying device comprises a material conveyor, a first elevator, wood shaving drying equipment and a dust remover, and further comprises the pre-drying device, the material conveyor is connected with a first feeding hole of the pre-drying device through a second elevator, a discharging hole of the pre-drying device is connected with a second feeding hole of the wood shaving drying equipment through the first elevator, a tail gas outlet of a boiler in the wood shaving drying equipment is connected with an air inlet of the pre-drying device through the first fan, and an air outlet of the pre-drying device is connected with the dust remover through the second fan. The pre-drying device is additionally arranged, the wet wood shavings are pre-dried by utilizing the waste heat in the tail gas of the boiler, the water content of the wet wood shavings is reduced while the energy is saved, and the energy consumption of the subsequent wood shavings drying equipment is greatly reduced.
Preferably, the pre-drying device comprises a pre-drying roller, a first feeding port and an air inlet are respectively arranged at the front end of the pre-drying roller, a feeding air locking valve is arranged at the first feeding port, a settling chamber is arranged at the rear end of the pre-drying roller, an air outlet is arranged above the settling chamber, a discharging port is arranged below the settling chamber, and a discharging air locking valve is arranged at the discharging port. Air locking valves are respectively added at the feed inlet and the discharge outlet, so that the pre-drying efficiency is improved.
Preferably, a flow guide mechanism which advances spirally from the feeding hole to the discharging hole is arranged on the inner wall of the pre-drying roller, the flow guide mechanism comprises a plurality of groups of straight flow guide plate groups, and an inclined flow guide plate group is arranged between every two adjacent straight flow guide plate groups.
Preferably, the straight guide plate group comprises a plurality of straight guide plates uniformly distributed on the inner wall of the pre-drying drum, the inclined guide plate group comprises a plurality of inclined guide plates uniformly distributed on the inner wall of the pre-drying drum, and the front end and the rear end of each inclined guide plate are respectively matched with two adjacent straight guide plates in the two straight guide plate groups. The guide mechanism is convenient for propelling the wet wood shavings forward, and meanwhile, in the rotating process of the pre-drying roller, the guide mechanism can bring the wet wood shavings to a high position to be lifted and scattered, so that the wet wood shavings are heated more uniformly.
Preferably, the included angle a between the oblique guide plate and the straight guide plate is 30-60 degrees. The included angle a is convenient for pushing the wet wood shavings to the direction of the discharge hole.
Preferably, a three-way valve is arranged at a discharge port of the pre-drying device, a first outlet of the three-way valve is connected with a second feed port through a first elevator, and a second outlet of the three-way valve is connected with the first feed port through a second elevator. The wet wood shavings can be conveniently pre-dried for multiple times through the three-way valve, and after the pre-drying reaches the standard, the wet wood shavings are conveniently fed into the wood shavings drying equipment for formal drying.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the utility model, the pre-drying device is additionally arranged in front of the wood shaving drying device, the pre-drying device recovers tail gas generated by an original wood shaving drying production line, waste heat in boiler tail gas is used as a drying heat medium to pre-dry wet wood shavings, so that the water content in the wet wood shavings is greatly reduced, the drying pressure of the wood shaving drying device is relieved, boiler fuel is saved, the electric energy consumption of a boiler is reduced, and meanwhile, the capacity of a subsequent wood shaving press is improved by 30%;
2. the flow guide mechanism is additionally arranged in the pre-drying roller, so that wet wood shavings can be conveniently pushed forward, and in the pre-drying process, the straight flow guide plate and the inclined flow guide plate in the flow guide mechanism are convenient to bring the wet wood shavings to a high position to be lifted and scattered, so that the wet wood shavings are heated more uniformly, and the pre-drying efficiency is improved;
3. the tail gas after the waste heat is collected is dedusted by the water film deduster, and compared with a cloth bag deduster in the prior art, the labor and sewage treatment cost is saved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the connection of a pre-drying apparatus to a dust collector;
fig. 3 is a schematic view of the internal structure of the pre-drying drum.
In the figure, 1, a screening mechanism; 2. a material conveyor; 3. a first hoister; 4. wood shaving drying equipment; 4.1, a feed inlet II; 4.2, a boiler; 5. a first fan; 6. a pre-drying device; 6.1, a first feeding hole; 6.2, a feeding airlock valve; 6.3, an air inlet; 6.4, a settling chamber; 6.5, an air outlet; 6.6, a discharge hole; 6.7, a discharging airlock valve; 6.8, a motor; 6.9, pre-drying the roller; 6.10, oblique guide plate; 6.11, a straight guide plate; 7. a dust remover; 8. a second hoisting machine; 9. a second fan; 10. a three-way valve; 11. a belt conveyor.
Detailed Description
The utility model will be further described with reference to the accompanying drawings in which:
example 1
As shown in fig. 1, the wood shaving drying production line with the exhaust gas waste heat pre-drying device comprises a material conveyor 2, a first elevator 3, a pre-drying device 6, wood shaving drying equipment 4 and a dust remover 7, wherein the material conveyor 2 is connected with a first feeding hole 6.1 of the pre-drying device 6 through a second elevator 8, a discharging hole 6.6 of the pre-drying device 6 is connected with a second feeding hole 4.1 of the wood shaving drying equipment 4 through a first elevator 3, a tail gas outlet of a boiler 4.2 in the wood shaving drying equipment 4 is connected with an air inlet 6.3 of the pre-drying device 6 through a first fan 5, and an air outlet 6.5 of the pre-drying device 6 is connected with the dust remover 7 through a second fan 9. Increase predrying device 6 before wood shavings drying equipment 4 to retrieve boiler 4.2's high temperature tail gas, this high temperature tail gas temperature is about 105 ℃, carry out predrying to wet wood shavings earlier through high temperature tail gas, make its water content descend, rethread wood shavings drying equipment 4 carries out formal drying, the drying pressure of wood shavings drying equipment 4 has been alleviateed, wood shavings drying efficiency is improved, save boiler fuel simultaneously, reduce boiler power consumption, the productivity that makes follow-up wood shavings press promotes greatly.
Example 2
As shown in fig. 2 and fig. 3, the pre-drying device 6 includes a pre-drying drum 6.9, a first feeding port 6.1 and an air inlet 6.3 are respectively arranged at the front end of the pre-drying drum 6.9, a first feeding port 6.1 is provided with a feeding air-lock valve 6.2, the rear end of the pre-drying drum 6.9 is provided with a settling chamber 6.4, an air outlet 6.5 is arranged above the settling chamber 6.4, a discharging port 6.6 is arranged below the settling chamber 6.4, and a discharging air-lock valve 6.7 is arranged at the discharging port 6.6. The feeding air locking valve 6.2 and the discharging air locking valve 6.7 prevent air leakage at the feeding port I6.1 and the discharging port I6.6, so that tail gas leakage and environment pollution are avoided, and meanwhile, the pre-drying efficiency is improved.
The inner wall of the pre-drying roller 6.9 is provided with a flow guide mechanism which spirally advances from the first feeding hole 6.1 to the second discharging hole 6.6, the flow guide mechanism comprises a plurality of groups of straight flow guide plate groups, and an inclined flow guide plate group is arranged between every two adjacent straight flow guide plate groups. The straight guide plate group comprises a plurality of straight guide plates 6.11 which are uniformly distributed on the inner wall of the pre-drying roller 6.9, the oblique guide plate group comprises a plurality of oblique guide plates 6.10 which are uniformly distributed on the inner wall of the pre-drying roller 6.9, as shown in figure 3, the front end and the rear end of each oblique guide plate 6.10 are respectively matched with two left-right adjacent straight guide plates 6.11 in the two groups of straight guide plate groups, so that the straight guide plates 6.11 are matched with the oblique guide plates 6.10 to form a spiral structure. The axial direction of the straight guide plate 6.11 is consistent with the axial direction of the pre-drying roller 6.9, and the included angle a between the oblique guide plate 6.10 and the straight guide plate 6.11 is 30-60 degrees; the rest is the same as in example 1. During manufacturing, the oblique guide plate 6.10 and the straight guide plate 6.11 are formed by bending steel plates, the bent steel plates are of 7-shaped structures, and the bottoms of the 7-shaped bent steel plates are fixedly connected with the inner wall of the pre-drying roller 6.9.
Example 3
A three-way valve 10 is arranged at a discharge port 6.6 of the pre-drying device 6, an outlet I of the three-way valve 10 is connected with a feed port II 4.1 through a first hoister 3, and an outlet II of the three-way valve 10 is connected with the feed port I6.1 through a second hoister 8; the rest is the same as in example 2.
When the wet wood shaving pre-drying device is installed, the front end of a material conveyor 2 is connected with a screening mechanism 1, a second elevator 8 sends wet wood shavings into a first feeding hole 6.1 through a belt conveyor 11, the rear end of a pre-drying roller 6.9 is arranged in a downward inclined mode, the wet wood shavings are conveniently pushed backwards during pre-drying, the inclination angle is controlled to be 2-5 degrees, the pre-drying roller 3 is supported through a base, a motor 6.8 is installed on the base, a gear ring is arranged on the pre-drying roller 6.9, and a gear matched with the gear ring is arranged at the output end of the motor 6.8. The motor 6.8 rotates to drive the gear to be meshed with the gear ring, so that the pre-drying roller 6.9 rotates, and pre-drying of wet wood shavings is carried out.
The working principle of the utility model is as follows: wet wood shavings are screened by the screening mechanism 1 and enter a second elevator 8 through the material conveyor 2, the second elevator 8 lifts the wet wood shavings, the wet wood shavings are conveyed into a first feed inlet 6.1 through a belt conveyor 11 and finally enter a pre-drying roller 6.9, a first motor 6.8 and a first fan 5 are started, the first fan 5 pumps high-temperature tail gas generated by a boiler 4.2 into the pre-drying roller 6.9, the motor 6.8 drives the pre-drying roller 6.9 to rotate, an inclined guide plate 6.10 and a straight guide plate 6.11 in the flow guide mechanism drive the wet wood shavings to rotate and push the wet wood shavings to the rear end of the pre-drying roller 6.9, and in the rotating process of the pre-drying roller 6.9, the inclined guide plate 6.10 and the straight guide plate 6.11 drive the wet wood shavings to be lifted to a high position and scattered, so that the wet wood shavings are fully contacted with the high-temperature tail gas, and the wet wood shavings are pre-dried through the high-temperature tail gas. The wood shavings after the pre-drying are discharged through the discharge hole 6.6 and the three-way valve 10, and if the pre-drying effect is not satisfactory, the wood shavings after the pre-drying can be sent into the pre-drying device 6 for re-pre-drying through the second outlet of the three-way valve 10. And tail gas after heat exchange enters the dust remover 7 through the air outlet 6.5 under the action of the second fan 9 for dust removal and then is discharged. If the pre-drying effect is satisfied, the pre-dried wood shavings are sent to the wood shavings drying device 4 for normal drying through the outlet of the three-way valve 10 and the first hoister 3, and the dried wood shavings enter the next process, which is the prior art and is not described again.
Claims (6)
1. The utility model provides a wood shavings drying production line with tail gas waste heat is drying device in advance, includes material conveyer (2), first (3) of lifting machine, wood shavings drying equipment (4) and dust remover (7), its characterized in that: still include drying device (6) in advance, material conveyer (2) are connected through second (8) of lifting machine and feed inlet (6.1) of drying device (6) in advance, discharge gate (6.6) of drying device (6) in advance are connected through first (3) of lifting machine and feed inlet two (4.1) of wood shavings drying equipment (4), the tail gas outlet of boiler (4.2) passes through first (5) of fan and is connected with air intake (6.3) of drying device (6) in wood shavings drying equipment (4), air outlet (6.5) of drying device (6) in advance are connected with dust remover (7) through second (9) of fan.
2. The wood shaving drying production line with the tail gas waste heat pre-drying device according to claim 1, characterized in that: the pre-drying device (6) comprises a pre-drying roller (6.9), a first feeding hole (6.1) and an air inlet (6.3) are respectively arranged at the front end of the pre-drying roller (6.9), a first feeding hole (6.1) is provided with a feeding air locking valve (6.2), the rear end of the pre-drying roller (6.9) is provided with a settling chamber (6.4), an air outlet (6.5) is arranged above the settling chamber (6.4), a discharge hole (6.6) is arranged below the settling chamber (6.4), and a discharge air locking valve (6.7) is arranged at the discharge hole (6.6).
3. The wood shaving drying production line with the tail gas waste heat pre-drying device according to claim 2, characterized in that: the inner wall of the pre-drying roller (6.9) is provided with a flow guide mechanism which spirally advances from the first feeding hole (6.1) to the second discharging hole (6.6), the flow guide mechanism comprises a plurality of groups of straight flow guide plate groups, and an inclined flow guide plate group is arranged between every two adjacent straight flow guide plate groups.
4. The wood shaving drying production line with the tail gas waste heat pre-drying device according to claim 3, characterized in that: the straight guide plate group comprises a plurality of straight guide plates (6.11) which are uniformly distributed on the inner wall of the pre-drying roller (6.9), the inclined guide plate group comprises a plurality of inclined guide plates (6.10) which are uniformly distributed on the inner wall of the pre-drying roller (6.9), and the front end and the rear end of each inclined guide plate (6.10) are respectively matched with two adjacent straight guide plates (6.11) in the two straight guide plate groups.
5. The wood shaving drying production line with the tail gas waste heat pre-drying device according to claim 4, characterized in that: the included angle a between the oblique guide plate (6.10) and the straight guide plate (6.11) is 30-60 degrees.
6. The wood shaving drying line with the exhaust gas waste heat pre-drying device according to any one of claims 1 to 5, characterized in that: a three-way valve (10) is arranged at a discharge port (6.6) of the pre-drying device (6), a first outlet of the three-way valve (10) is connected with a second feed port (4.1) through a first elevator (3), and a second outlet of the three-way valve (10) is connected with the first feed port (6.1) through a second elevator (8).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220657670.0U CN216868948U (en) | 2022-03-24 | 2022-03-24 | Wood shaving drying production line with tail gas waste heat pre-drying device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220657670.0U CN216868948U (en) | 2022-03-24 | 2022-03-24 | Wood shaving drying production line with tail gas waste heat pre-drying device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116379725A (en) * | 2023-03-08 | 2023-07-04 | 江苏力沛电力工程技术服务有限公司 | A high-moisture lignite pre-drying equipment integrated in a thermal power plant |
| CN116659220A (en) * | 2023-05-19 | 2023-08-29 | 中国中材国际工程股份有限公司 | A two-stage vertical drying equipment, system and method |
-
2022
- 2022-03-24 CN CN202220657670.0U patent/CN216868948U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116379725A (en) * | 2023-03-08 | 2023-07-04 | 江苏力沛电力工程技术服务有限公司 | A high-moisture lignite pre-drying equipment integrated in a thermal power plant |
| CN116379725B (en) * | 2023-03-08 | 2025-09-16 | 江苏力沛电力工程技术服务有限公司 | High-moisture lignite predrying equipment integrated to thermal power plant |
| CN116659220A (en) * | 2023-05-19 | 2023-08-29 | 中国中材国际工程股份有限公司 | A two-stage vertical drying equipment, system and method |
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