CN108816768B - Multistage separation degritting's wood flour dirt recovery unit - Google Patents
Multistage separation degritting's wood flour dirt recovery unit Download PDFInfo
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- CN108816768B CN108816768B CN201810679926.6A CN201810679926A CN108816768B CN 108816768 B CN108816768 B CN 108816768B CN 201810679926 A CN201810679926 A CN 201810679926A CN 108816768 B CN108816768 B CN 108816768B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
- B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/02—Arrangement of air or material conditioning accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/06—Feeding or discharging arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/01—Selective separation of solid materials carried by, or dispersed in, gas currents using gravity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/04—Selective separation of solid materials carried by, or dispersed in, gas currents by impingement against baffle separators
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- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a wood dust recycling device for multistage separation and desanding, which mainly comprises a wood dust bin, a discharge rotary valve I, a motor I, a feeding screw, a vertical blanking pipe, an inclined blanking pipe, a sand grain separation chamber, a motor II, a fan I, sand grains and impurity conveying pipes, a discharge rotary valve II, a vertical sand grain separation pipe, a wood dust conveying pipe I and a fan II; a main air inlet and a fence are arranged at the position where the inclined blanking pipe is communicated with the sand grain separation chamber; the main air inlet is provided with a main air door; an auxiliary air inlet is arranged at the position where the wood dust conveying pipe I is communicated with the vertical sand separating pipe (18); the auxiliary air inlet is provided with an auxiliary air door. The invention has simple structure, high separation efficiency and good sand removal effect, can control the air flow speed in the sand remover, and can respectively and automatically convey the separated wood dust and sand into corresponding external equipment.
Description
Technical Field
The invention belongs to dust separation equipment, and particularly relates to a wood powder dust recycling device for multistage separation and sand removal.
Background
Surface sanding is the last processing procedure in the fiberboard production process. It is calculated that the amount of wood powder dust produced after sanding the fiberboard is about 3-4% of the amount of the fiberboard product. China is the first fiber board production in the world, and the annual quantity of sand wood dust is remarkable. Regarding the treatment of the sanded wood dust of the fiber board, the wood dust is recovered by dust collection equipment in most of the current fiber board production enterprises in China due to the consideration of resource saving, and then is mixed with the fiber in proportion as an additional raw material for being reused for pressing the fiber board. The recycling of the sanding wood dust can reduce the waste of resources and the production cost, and the sanding wood dust can also fill fiber gaps in the fiber board, thereby improving the density of the fiber board and the quality of the board surface. Therefore, recycling the fiberboard sanding wood dust has become a common knowledge for fiberboard manufacturers. However, at present, all enterprises face a common problem in the process of recycling wood dust: this is the process of sanding the fiberboard, the sand particles on the sand belt are continuously shed and mixed into the sanded wood dust, and then enter the fiberboard product by being mixed with the fiber raw material. When sanding a fiberboard containing sand particles, the sand particles contained in the fiberboard can cause serious damage to the sanding process: firstly, the sand grains block the sand cutting, so that the quality of the board surface is rough, the product is reduced, and the like; secondly, because the sand grains have a gnawing effect on the abrasive belt, the abrasive belt is abnormally desanding, the service life of the abrasive belt is reduced, and because the abrasive belt is expensive, the sanding cost is greatly increased. More seriously, the sand particles which are abnormally fallen off return to the raw material bin through dust collection equipment and then enter the fiberboard, so that vicious circle is repeatedly formed, and the enterprise is very headache. For this reason, the inventors have proposed some proposals, such as chinese patent application No. 2014208041607, chinese patent application No. 2014208041842, and chinese patent application No. 2015101573109, which achieve effective separation of wood dust and sand particles to some extent, but they have disadvantages such as low separation efficiency, non-adjustable air flow rate, uncontrollable sand particle separation effect, inability to automatically transport separated sand particles and impurities, and so on.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the wood powder recycling device for multistage separation and desanding, which has the advantages of simple structure, high separation efficiency and controllable separation effect.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a wood powder recovery device for multistage separation and sand removal mainly comprises a wood powder bin, a discharge rotary valve I, a motor I, a feeding screw, a vertical blanking pipe, an inclined blanking pipe, a sand separation chamber, a motor II, a fan I, sand and impurity conveying pipes, a discharge rotary valve II, a vertical sand separation pipe, a wood powder conveying pipe I and a fan II; the discharging rotary valve I is arranged between the wood dust bin and the feeding screw; one end of the feeding screw is connected with a power output shaft of the motor I, and the other end of the feeding screw is connected with one end of the vertical blanking pipe; the other end of the vertical blanking pipe is communicated with the sand separation chamber through an inclined blanking pipe; the discharging rotary valve II is arranged between the sand grain separation chamber and the sand grain and impurity conveying pipe, and the control end of the discharging rotary valve II is connected with the power output shaft of the motor II; one end of the sand grain and impurity conveying pipe is connected with the fan I; the fan II is communicated with the sand separation chamber through a wood dust conveying pipe I and a vertical sand separation pipe in sequence;
a sand blocking wall is arranged at the communication position of the sand separating chamber and the vertical sand separating pipe, and is obliquely arranged inwards;
a main air inlet and a fence are arranged at the position where the inclined blanking pipe is communicated with the sand grain separation chamber; the main air inlet is provided with a main air door; the fence is obliquely arranged on a main channel of wood dust above the sand grain separation chamber;
an auxiliary air inlet is arranged at the position where the wood dust conveying pipe I is communicated with the vertical sand grain separating pipe; the auxiliary air inlet is provided with an auxiliary air door;
wood dust and sand impurities in the wood dust bin enter a feeding spiral from a discharging rotary valve I at the bottom of the wood dust bin, then enter a sand separation chamber through a vertical blanking pipe and an inclined blanking pipe in sequence for preliminary separation, and the large-particle sand impurities fall into the bottom of the sand separation chamber under the action of gravity; the wood dust and the sand impurities with fine particles enter a vertical sand separating pipe for further separation under the action of air flow, the sand impurities with fine particles fall into the bottom of a sand separating chamber under the action of gravity and are sent into sand and impurity conveying pipelines by a discharging rotary valve II together with the sand impurities with large particles, and finally are sent out of the wood dust recycling device for multistage separation and sand removal by a fan I; the wood dust after further separation is sent out of the wood dust recycling device for multistage separation and desanding by a fan II through a wood dust conveying pipe I.
Further, the inclination of the fence is the same as that of the inclined blanking pipe.
Further illustratively, the sand separating chamber is provided with a viewing window.
Further stated, the fan I is communicated with a combustion furnace arranged outside through a pneumatic conveying pipe.
Further stated, the fan II is communicated with an externally arranged fiber dryer through a wood powder conveying pipe II.
The invention is based on the principle of structural design:
in the air, the object can be supported in the air without falling down at the air flow velocity V s Referred to as the levitation speed of the object. From physics, it is known that: the suspension speed of particulate matter in air can be determined by:
wherein: v (V) s Suspension speed (m/s), d of particulate matter s Diameter (m), gamma of particulate matter s -weight of particulate matter (kg/m) 3 )，γ a -severe air (kg/m) 3 )。
From the above formula, it can be seen that: suspension velocity V of particulate matter in air flow s Diameter d of particle s Severe gamma s Related to the following. I.e. particles of the same diameter, with larger weight, larger suspension speed and smaller weightThe suspension speed is small. Particles of the same weight have a large suspending speed when they have a large diameter and have a small suspending speed when they have a small diameter.
The object to which the invention is directed is wood dust and sand particles in an air stream. It is evident that in general the sand particles are of greater diameter and weight than wood dust, i.e. d s sand grain ＞d s-shaped wood powder dust 、γ s sand grain ＞γ s-shaped wood powder dust . Thus, the suspension speed of the sand grains is constantly greater than that of the wood dust, i.e. V s sand grain ＞V s-shaped wood powder dust . Currently, the materials of abrasive belt sand grains are mainly white corundum, brown corundum or silicon carbide. Through measurement and calculation, the suspension speed of sand grains is about 2.5 times of that of wood dust, namely V s sand grain ＝2.5V s-shaped wood powder dust 。
According to the invention, by utilizing the principle that the suspension speed difference exists between sand grains and wood dust, the wood dust recovery device for multistage separation and sand removal is additionally arranged in the log dust conveying pipeline, and on the premise that the air flow and the flow speed in the log dust conveying pipeline are unchanged, only wood dust can reach the end point of the wood dust conveying pipeline and enter the fiber drying pipeline, so that sand grains can not reach the end point and are retained in and separated from a sand grain separation chamber of the wood dust recovery device for multistage separation and sand removal, thereby achieving the purpose of removing the sand grains in the wood dust.
The working principle (working process) of the invention is as follows:
when the work starts, the main air door is opened, the auxiliary air door is closed, and the fan I, the fan II, the motor I and the motor II are started. Under the action of negative pressure generated by the fan II, air enters the sand separation chamber from the main air inlet, and then enters the fiber dryer through the vertical sand separation pipe, the wood dust conveying pipe I, the fan II and the wood dust conveying pipe II. The wood dust in the wood dust bin falls into a feeding spiral through a discharging rotary valve I, and the feeding spiral conveys the wood dust into a vertical blanking pipe of the sand remover under the driving of a motor I and then enters an inclined blanking pipe. When wood dust vertically falls down through the inclined blanking pipe in the vertical blanking pipe, the wood dust is sheared and collided with the inclined pipe wall of the inclined blanking pipe to be dispersed, and then slides into a sand grain separation chamber of the sand remover along an inclined plane. After entering the sand separating chamber, the wood dust is carried by the air flow from right to left. The wood powder dust which is not completely dispersed in the inclined blanking pipe is continuously dispersed under the action of the fence, so that the sand grains and the wood powder dust are fully separated. Since the air flow velocity in the sand separating chamber is set between the wood dust and the suspension velocity of the sand, i.e. the air flow velocity in the sand separating chamber is higher than the suspension velocity of the wood dust and lower than the suspension velocity of the sand. Therefore, the air flow in the sand separating chamber, which is higher than the suspension speed of wood dust, can carry the wood dust all the way through the vertical sand separating pipe, the wood dust conveying pipe I, the fan II and the wood dust conveying pipe II to enter the fiber dryer for recycling. And the sand cannot be carried forward further because the air flow rate in the sand separating chamber is lower than the suspension speed of the sand. Therefore, most sand falls into the bottom of the sand separating chamber under the action of gravity, is sent into the sand and impurity conveying pipeline by the unloading rotary valve II, and is finally sent into the combustion furnace by the blower I through the pneumatic conveying pipe for incineration and conversion into heat energy. Part of sand which is carried forward by wood dust collides with the sand blocking wall and is rebounded back to the bottom of the sand separating chamber to be separated. Part of the sand entering the vertical sand separation pipe is separated by sedimentation back into the sand separation chamber without obtaining sufficient suspension air flow velocity. Obviously, when the main air door is fully closed and the auxiliary air door is fully opened, all dust and sand are settled into the sand separating chamber and are sent into the combustion furnace for combustion by the discharging rotary valve II and the fan I. Therefore, as long as the opening degrees of the main air door and the auxiliary air door are properly coordinated, sand grains in wood dust can be completely separated by the sand remover, and the sand removal rate can reach 100% at most, so that the aim of thoroughly removing sand is fulfilled.
The invention has the advantages that:
1. the invention has simple structure, high separation efficiency and good sand removal effect, can control the air flow speed in the sand remover, and can respectively and automatically convey the separated wood dust and sand into corresponding external equipment.
2. The wood powder and dust recycling device for multistage separation and sand removal adopts a box-shaped structure with any section of equal width and rectangle, and is easy to process and manufacture.
3. The wood powder recycling device for multistage separation and sand removal is provided with two air inlets: a main air inlet and a secondary air inlet. The main air inlet is responsible for providing power and speed for wood dust, and pure wood dust can be carried by air current and smoothly enter the fiber drying pipeline for recycling. The auxiliary air inlet is used for adjusting the air flow speed in the sand separation chamber so as to obtain the required sand separation effect. The specific adjusting method is as follows: when the opening degree of the sub damper is increased, the air flow rate in the sand separation chamber is decreased, and when the opening degree of the sub damper is decreased, the air flow rate in the sand separation chamber is increased.
4. According to the wood powder recovery device for multistage separation desanding, the wood powder discharging pipeline adopts a composite pipeline form of a vertical discharging pipeline and an inclined discharging pipeline, so that the dispersion of agglomerated wood powder is facilitated. The agglomerated wood dust conveyed by the feeding screw moves in a free falling manner in the vertical blanking pipe at first, then enters the inclined blanking pipe and is sheared and collided with the inclined pipe wall of the inclined blanking pipe to be dispersed.
5. According to the wood powder recycling device for multistage separation and sand removal, the fence is arranged on the main channel of the wood powder above the sand separation chamber, so that the structural wood powder can be dispersed again, and the sand and the wood powder can be fully separated.
6. According to the wood powder and dust recycling device for multistage separation and sand removal, the inclined sand blocking wall is arranged at the end of the wood powder and dust main channel of the sand separation chamber, and part of sand passes through the sand separation chamber along with air flow, and is rebounded to the bottom of the sand separation chamber after impacting the sand blocking wall to be separated.
7. The wood powder and dust recycling device for multistage separation and sand removal is provided with the vertical sand separation pipe, and part of sand grains are settled back to the bottom of the sand grain separation chamber to be separated again due to insufficient suspension speed after entering the vertical sand separation pipe along with wood powder and dust.
8. According to the wood powder and dust recycling device for multistage separation and sand removal, the discharging rotary valve is arranged at the bottom of the sand separation chamber, so that separated sand, impurities and coarse wood powder and dust can be conveyed into the sand and impurity conveying pipes at any time, and the sand, impurities and coarse wood powder and dust are conveyed to the combustion furnace through the fan to be combusted and converted into heat energy.
9. According to the wood powder and dust recycling device for multistage separation and sand removal, the transparent observation window is arranged on the front face of the box wall of the sand separation chamber, the separation effect of sand can be directly observed through the observation window, and the main air door and the auxiliary air door are adjusted according to observation conditions, so that the optimal sand removal effect is obtained.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Reference numerals: the wood dust bin 1, a discharge rotary valve I2, a motor I3, a feeding screw 4, a vertical blanking pipe 5, an inclined blanking pipe 6, a main air door 7, a main air inlet 8, a fence 9, a sand grain separation chamber 10, a motor II 11, a pneumatic conveying pipe 12, a fan I13, sand grains and impurity conveying pipes 14, a discharge rotary valve II 15, an observation window 16, a sand grain blocking wall 17, a vertical sand grain separation pipe 18, an auxiliary air inlet 19, an auxiliary air door 20, a wood dust conveying pipe I21, a fan II 22 and a wood dust conveying pipe II 23.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Examples:
as shown in figure 1, the wood dust recycling device for multistage separation and sand removal mainly comprises a wood dust bin 1, a discharge rotary valve I2, a motor I3, a feeding screw 4, a vertical blanking pipe 5, an inclined blanking pipe 6, a sand separation chamber 10, a motor II 11, a fan I13, a sand and impurity conveying pipe 14, a discharge rotary valve II 15, a vertical sand separation pipe 18, a wood dust conveying pipe I21 and a fan II 22; the discharging rotary valve I2 is arranged between the wood dust bin 1 and the feeding screw 4; one end of the feeding screw 4 is connected with a power output shaft of the motor I3, and the other end of the feeding screw 4 is connected with one end of the vertical blanking pipe 5; the other end of the vertical blanking pipe 5 is communicated with a sand separation chamber 10 through an inclined blanking pipe 6; the discharging rotary valve II 15 is arranged between the sand separation chamber 10 and the sand and impurity conveying pipe 14, and the control end of the discharging rotary valve II 15 is connected with the power output shaft of the motor II 11; one end of the sand and impurity conveying pipe 14 is connected with the fan I13; the fan II 22 is communicated with the sand separation chamber 10 through a wood dust conveying pipe I21 and a vertical sand separation pipe 18 in sequence;
a sand blocking wall 17 is arranged at the communication position of the sand separating chamber 10 and the vertical sand separating pipe 18, and the sand blocking wall 17 is obliquely arranged inwards;
a main air inlet 8 and a fence 9 are arranged at the communication position of the inclined blanking pipe 6 and the sand separation chamber 10; the main air inlet 8 is provided with a main air door 7; the fence 9 is obliquely arranged on the main channel of wood dust above the sand separation chamber 10, and the inclination of the fence 9 is the same as that of the oblique blanking pipe 6;
an auxiliary air inlet 19 is arranged at the communication position of the wood dust conveying pipe I21 and the vertical sand separating pipe 18; the auxiliary air inlet 19 is provided with an auxiliary air door 20;
wood dust and sand impurities in the wood dust bin 1 enter a feeding screw 4 from a discharging rotary valve I2 at the bottom of the wood dust bin 1, then enter a sand separation chamber 10 through a vertical blanking pipe 5 and an inclined blanking pipe 6 in sequence for preliminary separation, and the large-particle sand impurities fall into the bottom of the sand separation chamber 10 under the action of gravity; the wood dust and the sand impurities with fine particles enter a vertical sand separation pipe 18 for further separation under the action of air flow, the sand impurities with fine particles fall into the bottom of a sand separation chamber 10 under the action of gravity, are sent into a sand and impurity conveying pipeline 14 together with the sand impurities with large particles by a discharge rotary valve II 15, and are finally sent out of the wood dust recycling device for multistage separation and sand removal by a fan I13; the wood dust after further separation is sent out of the wood dust recycling device for multistage separation and desanding by a fan II 22 through a wood dust conveying pipe I21.
. The sand separation chamber 10 is provided with a viewing window 16. The fan I13 is communicated with a combustion furnace arranged outside through a pneumatic conveying pipe 12. The fan II 22 is communicated with an externally arranged fiber dryer through a wood powder conveying pipe II 23.
Claims (4)
1. A multistage separation degritting's wood flour dirt recovery unit, its characterized in that: the wood dust separating device mainly comprises a wood dust bin (1), a discharging rotary valve I (2), a motor I (3), a feeding screw (4), a vertical blanking pipe (5), an inclined blanking pipe (6), a sand separating chamber (10), a motor II (11), a fan I (13), sand and impurity conveying pipes (14), a discharging rotary valve II (15), a vertical sand separating pipe (18), a wood dust conveying pipe I (21) and a fan II (22); the discharging rotary valve I (2) is arranged between the wood dust bin (1) and the feeding screw (4); one end of the feeding screw (4) is connected with a power output shaft of the motor I (3), and the other end of the feeding screw (4) is connected with one end of the vertical blanking pipe (5); the other end of the vertical blanking pipe (5) is communicated with the sand separation chamber (10) through an inclined blanking pipe (6); the discharging rotary valve II (15) is arranged between the sand separation chamber (10) and the sand and impurity conveying pipe (14), and the control end of the discharging rotary valve II (15) is connected with the power output shaft of the motor II (11); one end of the sand and impurity conveying pipe (14) is connected with the fan I (13); the fan II (22) is communicated with the sand separation chamber (10) through the wood dust conveying pipe I (21) and the vertical sand separation pipe (18) in sequence;
a sand blocking wall (17) is arranged at the communication position of the sand separating chamber (10) and the vertical sand separating pipe (18), and the sand blocking wall (17) is obliquely arranged inwards;
a main air inlet (8) and a fence (9) are arranged at the communication position of the inclined blanking pipe (6) and the sand separation chamber (10); the main air inlet (8) is provided with a main air door (7); the fence (9) is obliquely arranged on a main channel of wood dust above the sand separation chamber (10); the inclination of the fence (9) is the same as that of the inclined blanking pipe (6);
an auxiliary air inlet (19) is arranged at the position where the wood dust conveying pipe I (21) is communicated with the vertical sand grain separating pipe (18); the auxiliary air inlet (19) is provided with an auxiliary air door (20);
wood dust and sand impurities in the wood dust bin (1) enter a feeding screw (4) from a discharging rotary valve I (2) at the bottom of the wood dust bin (1), then enter a sand separation chamber (10) through a vertical blanking pipe (5) and an inclined blanking pipe (6) in sequence for preliminary separation, and the large-particle sand impurities fall into the bottom of the sand separation chamber (10) under the action of gravity; wood dust and fine-grain sand impurities enter a vertical sand grain separation pipe (18) for further separation under the action of air flow, the fine-grain sand impurities fall into the bottom of a sand grain separation chamber (10) under the action of gravity and are sent into sand grains and impurity conveying pipes (14) together with large-grain sand impurities by a discharge rotary valve II (15), and finally are sent out of the wood dust recycling device for multistage separation and sand removal by a fan I (13); the wood dust after further separation is sent out of the wood dust recycling device for multistage separation and desanding by a fan II (22) through a wood dust conveying pipe I (21).
2. The multistage separation desanding wood dust recycling device according to claim 1, wherein: the sand separation chamber (10) is provided with an observation window (16).
3. The multistage separation desanding wood dust recycling device according to claim 1, wherein: the fan I (13) is communicated with a combustion furnace arranged outside through a pneumatic conveying pipe (12).
4. The multistage separation desanding wood dust recycling device according to claim 1, wherein: the fan II (22) is communicated with an externally arranged fiber dryer through a wood powder conveying pipe II (23).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810679926.6A CN108816768B (en) | 2018-06-27 | 2018-06-27 | Multistage separation degritting's wood flour dirt recovery unit |
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| CN201810679926.6A CN108816768B (en) | 2018-06-27 | 2018-06-27 | Multistage separation degritting's wood flour dirt recovery unit |
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| CN108816768B true CN108816768B (en) | 2023-07-25 |
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| CN111279875A (en) * | 2018-12-07 | 2020-06-16 | 耒阳市绿联生态农业有限公司 | Straw cuts up retrieves trimmer |
| CN112044776A (en) * | 2020-09-01 | 2020-12-08 | 许婷婷 | Industrial raw material grading dust removal circulating device |
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