CN223701166U - Waste wood recycling, pulverizing and processing line and wood processing system - Google Patents

Abstract

A waste wood recycling and powder processing line and a wood processing system are disclosed. The waste wood recycling and powder processing line includes a two-stage vibrating screen with a first-stage screen and a second-stage screen arranged sequentially from high to low. A coarse powder processing line includes a coarse powder conveyor belt for receiving coarse powder above the first-stage screen. A medium powder conveyor belt receives medium powder above the second-stage screen at its input end, and its conveying end is connected to the input end of a secondary crushing device. The output end of the secondary crushing device is connected to the input end of a medium powder fine screening device, and its output end is connected to the input end of a medium powder receiving device. A fine powder conveyor belt receives fine powder below the second-stage screen at its input end. A fine powder iron removal device is installed on the fine powder conveyor belt, and its conveying end is connected to the input end of the fine powder receiving device. This solution solves the problems of cumbersome processing steps, high processing costs, and large space occupation caused by long-term accumulation of waste wood in the factory.

Description

Waste wood recycling, pulverizing and processing line and wood processing system

Technical Field

The utility model relates to the field of wood processing devices, in particular to a waste wood recycling powder process processing line and a wood processing system.

Background

The wood in the existing wood processing factory is left with waste wood after being processed by a plurality of processing procedures, and the waste wood can be accumulated in a factory building for a long time, so that a large amount of space of the factory building is occupied, and the problems of high storage cost and complicated processing steps exist. This is because wood, after being shredded into powder, forms different particle sizes, respectively; in the prior art, powder with different particle sizes can be directly utilized, but the application of wood powder can be different due to different particle sizes. If the powder is applied directly without further sieving, the properties of the final application may be affected, for example, the composite board may have problems such as excessively low strength.

Disclosure of utility model

The utility model aims to provide a waste wood recycling and pulverizing processing line, which is characterized in that waste wood is directly conveyed to a primary crushing device through a feeding conveying device, coarse powder, medium powder and fine powder are sieved by utilizing a second-order vibration sieve, and powder with different particle diameters can be output to a coarse powder treatment branching line, a medium powder treatment branching line and a fine powder treatment branching line, so that the waste wood is directly and automatically finely sieved to the required fine powder.

The utility model also provides a wood processing system provided with the waste wood recycling and pulverizing processing line.

To achieve the purpose, the utility model adopts the following technical scheme:

A waste wood recycling and pulverizing processing line comprises a feeding and conveying device, a primary crushing device, a second-order vibrating screen, a coarse powder processing branching, a medium powder processing branching and a fine powder processing branching;

The feeding conveying device is used for conveying waste wood to the input ends of the first crushing device and the top of the second vibrating screen sequentially, wherein the second vibrating screen is provided with a first-order screen and a second-order screen sequentially from high to low, and the caliber of the screen of the first-order screen is larger than that of the screen of the second-order screen;

The coarse powder treatment branching line is provided with a coarse powder conveying belt, the coarse powder conveying belt is used for receiving coarse powder above the first-order screen mesh, and the conveying tail end of the coarse powder conveying belt is communicated with the input end of the primary crushing device;

The medium powder treatment branching line comprises a medium powder conveying belt, a medium powder deironing device, a secondary crushing device, a medium powder fine screening device and a medium powder receiving device;

The input end of the medium powder conveying belt receives medium powder above the second-order screen mesh, the medium powder iron removing device is arranged on the medium powder conveying belt, and the conveying tail end of the medium powder conveying belt is communicated with the input end of the secondary crushing device;

the fine powder treatment branching comprises a fine powder conveying belt, a fine powder iron removing device and a fine powder receiving device;

the fine powder receiving device comprises a fine powder conveying belt, a fine powder iron removing device, a fine powder receiving device and a fine powder conveying belt, wherein the input end of the fine powder conveying belt receives fine powder below the second-order screen through the second-order screen, the fine powder iron removing device is arranged on the fine powder conveying belt, and the conveying tail end of the fine powder conveying belt is communicated with the input end of the fine powder receiving device.

Optimally, the device also comprises a preliminary vibrating screen;

the primary vibrating screen is arranged at the conveying end of the feeding conveying device, the conveying end of the feeding conveying device sequentially passes through the primary vibrating screen, the primary crushing device and the second-order vibrating screen, and the primary vibrating screen is provided with an impurity screen.

Optimally, the coarse powder treatment branching further comprises a coarse powder conveying air pipe and a coarse powder fan;

The coarse powder conveying air pipe is characterized in that the input end of the coarse powder conveying air pipe is communicated with the second-order vibrating screen and is positioned above the screen of the first-order screen, the output end of the coarse powder conveying air pipe is communicated with the conveying end of the coarse powder conveying belt, and the coarse powder fan is arranged in the coarse powder conveying air pipe.

Optimally, the medium powder treatment branching line also comprises a medium powder hopper bin, a medium powder conveying air pipe and a medium powder fan;

The inner cavity of the middle powder hopper bin is gradually reduced from top to bottom;

The input end of the medium powder conveying air pipe is communicated with the second-order vibrating screen and is positioned above the screen of the second-order screen, the medium powder blower is arranged on the medium powder conveying air pipe, the output end of the medium powder conveying air pipe is communicated with the input end above the medium powder hopper bin, and the output end below the medium powder hopper bin is aligned with the conveying end of the medium powder conveying belt.

Optimally, the medium powder iron removing device comprises a medium powder magnet roller;

The medium powder magnet roller is contacted with or close to the conveying end of the medium powder conveying belt.

Optimally, the medium powder treatment branching line comprises a medium powder rack;

The secondary crushing device and the medium powder fine screening device are respectively arranged on the upper layer of the medium powder rack from top to bottom, and the medium powder receiving device is arranged on the lower layer of the medium powder rack;

The device for removing iron from the middle powder comprises an iron outlet pipe and an iron receiving container;

The middle powder magnet roller is positioned on the upper layer of the middle powder rack, the iron discharging pipe is arranged on the middle powder rack, the input end of the iron discharging pipe is positioned on the upper layer of the middle powder rack, and the output end of the iron discharging pipe is positioned on the lower layer of the middle powder rack and communicated with the iron receiving container below.

Optimally, the fines disposal separation line further comprises a fines output conduit;

The upper end of the fine powder output conduit is communicated with the second-order vibrating screen and is positioned below the screen of the second-order screen, and the lower end of the fine powder output conduit is in butt joint with the conveying end of the fine powder conveying belt.

Optimally, the fine powder treatment branching line further comprises a fine powder shielding hood;

The fine powder shielding hood is arranged on the fine powder conveying belt, covers the periphery of the fine powder conveying belt between the conveying initial end and the fine powder iron removing device, and the lower end of the fine powder output guide pipe is communicated with the fine powder shielding hood.

Optimally, the fine powder iron removing device comprises a fine powder iron removing moving mechanism, a fine powder iron removing electromagnet and a fine powder iron removing container;

The fine powder iron removing moving mechanism is arranged above the fine powder conveying belt, the fine powder iron removing container is arranged beside the fine powder conveying belt, and the output end of the fine powder iron removing moving mechanism is connected with the fine powder iron removing electromagnet and used for driving the fine powder iron removing electromagnet to move so that the fine powder iron removing electromagnet moves between the conveying end of the fine powder conveying belt and the fine powder iron removing container.

A wood processing system is provided with the waste wood recycling powder process line.

Compared with the prior art, one of the technical schemes has the following beneficial effects:

The utility model provides a waste wood retrieves powder process line, it is directly carried to primary breaker through material loading conveyer with waste wood, and the second order shakes out coarse powder, middling and fine powder with the second order of recycle, can export the powder of different particle diameters to coarse powder processing separated time, middling processing separated time and fine powder processing separated time again to directly with waste wood automatic fine screening to required fine powder, solved current waste wood's processing step loaded down with trivial details and processing cost and pile up the problem that leads to occupation space big at the factory building for a long time.

Drawings

FIG. 1 is a schematic view showing the construction of one embodiment of a waste wood recycling pulverizing line;

FIG. 2 is a schematic diagram of one embodiment of a middling treatment split;

FIG. 3 is a schematic diagram of one embodiment of a fines handling distribution line.

Wherein:

The device comprises a feeding conveying device 1, a primary crushing device 2, a second-order vibrating screen 3, a coarse powder treatment branching 4, a medium powder treatment branching 5 and a fine powder treatment branching 6, and a primary vibrating screen 7;

A first-order screen 31 and a second-order screen 32;

A coarse powder conveying belt 41, a coarse powder conveying air pipe 42 and a coarse powder blower 43;

A medium powder conveyer belt 51, a medium powder deironing device 52, a secondary crushing device 53, a medium powder fine screening device 54, a medium powder receiving device 55, a medium powder hopper bin 56, a medium powder conveying air pipe 57, a medium powder fan 58 and a medium powder rack 59;

a middle powder magnet roller 521, a tapping pipe 522, a receiving container 523;

A fine powder conveying belt 61, a fine powder iron removing device 62, a fine powder receiving device 63, a fine powder output conduit 64, a fine powder shielding hood 65;

a fine powder iron removal moving mechanism 621, a fine powder iron removal electromagnet 622, and a fine powder iron removal container 623;

Impurity screen 71.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly, for distinguishing between the descriptive features, and not sequentially, and not lightly. In the description of the present utility model, unless otherwise indicated, the meaning of "plurality" is two or more.

1-3, A waste wood recycling and pulverizing processing line comprises a feeding conveying device 1, a primary crushing device 2, a second-order vibrating screen 3, a coarse powder processing branching 4, a medium powder processing branching 5 and a fine powder processing branching 6;

The feeding and conveying device 1 is characterized in that the conveying end of the feeding and conveying device 1 is used for sequentially conveying waste wood to the input ends at the tops of the primary crushing device 2 and the second-order vibrating screen 3, the second-order vibrating screen 3 is sequentially provided with a first-order screen 31 and a second-order screen 32 from high to low, and the screen aperture of the first-order screen 31 is larger than that of the second-order screen 32;

The coarse powder treatment branching 4 is provided with a coarse powder conveying belt 41, the coarse powder conveying belt 41 is used for receiving coarse powder above the first-stage screen 31, and the conveying tail end of the coarse powder conveying belt 41 is communicated with the input end of the primary crushing device 2;

The medium powder treatment branching line 5 comprises a medium powder conveying belt 51, a medium powder deironing device 52, a secondary crushing device 53, a medium powder fine screening device 54 and a medium powder receiving device 55;

The input end of the medium powder conveyer belt 51 receives medium powder above the second-order screen 32, the medium powder iron removing device 52 is arranged on the medium powder conveyer belt 51, and the conveying end of the medium powder conveyer belt 51 is communicated with the input end of the secondary crushing device 53, the output end of the secondary crushing device 53 is communicated with the input end of the medium powder fine screening device 54, and the output end of the medium powder fine screening device 54 is communicated with the input end of the medium powder receiving device 55;

the fine powder treatment branching 6 comprises a fine powder conveying belt 61, a fine powder iron removing device 62 and a fine powder receiving device 63;

The input end of the fine powder conveying belt 61 receives fine powder below the second-order screen 32 of the second-order vibrating screen 3, the fine powder iron removing device 62 is arranged on the fine powder conveying belt 61, and the conveying end of the fine powder conveying belt 61 is communicated with the input end of the fine powder receiving device 63.

This scheme provides a waste wood retrieves powder process line, it carries waste wood to primary breaker 2 through material loading conveyer 1 directly, and the second order shakes 3 of recycling and separates coarse powder, middling and fine powder, can export the powder of different particle diameters to coarse powder processing separated time 4, middling processing separated time 5 and fine powder processing separated time 6 again to directly with waste wood automatic fine screening to required fine powder, solved current waste wood's processing step loaded down with trivial details and processing cost and pile up the problem that occupation space is big at the factory building for a long time.

Specifically, the feeding and conveying device 1 is used for inputting waste wood, and the conveying end of the feeding and conveying device 1 sequentially outputs the waste wood to the primary crushing device 2 and the second-order vibrating screen 3; the primary crushing device 2 is used for crushing the waste wood, the waste wood is crushed into powder with different thicknesses, the powder is output to the secondary vibrating screen 3, the screen mesh of the primary screen 31 and the screen mesh of the secondary screen 32 are arranged in the secondary vibrating screen 3, the screen mesh of the primary screen 31 is larger than the screen mesh of the secondary screen 32, coarse powder is arranged above the screen of the primary screen 31, the middle powder and the fine powder can pass through the primary screen 31, the middle powder is arranged above the screen of the secondary screen 32, the fine powder can normally pass through the secondary screen 32, the coarse powder, the middle powder and the fine powder can be respectively transferred to different processing procedures, for coarse powder, only the screen mesh of the primary screen 31 is required to be transferred to the coarse powder processing branching 4 in a manual or mechanical automation mode, for middle powder, only the middle powder above the screen mesh of the secondary screen 32 is required to be transferred to the middle powder processing branching 5 in a free falling mode, the fine powder can be transferred below the secondary screen 32 and directly or indirectly to the fine powder processing 6, in the coarse powder processing 4, the coarse powder is conveyed to the crushing branching device 41 and is output to the crushing device for recycling until the coarse powder is separated from the crushing branching line to the crushing route for forming the fine powder. In the middle powder treatment branching 5, the middle powder conveying belt 51 receives middle powder and conveys the middle powder to the secondary crushing device 53, a middle powder iron removing device 52 can be arranged between the input end and the output end of the middle powder conveying belt 51, iron of the middle powder can be mainly removed, the influence of iron on secondary crushing of the middle powder is avoided, the secondary crushing device 53 continues to crush the middle powder for the second time, the middle powder is further crushed into smaller particle size and is transferred to the middle powder fine screening device 54, the middle powder fine screening device 54 screens the crushed middle powder again and outputs qualified powder to the middle powder receiving device 55, in the fine powder treatment branching 6, the fine powder conveying belt 61 receives fine powder below a second-order screen 32, the fine powder only needs to be simply removed by the fine powder iron removing device 62, the fine powder is good product, and the fine powder can be directly output to the fine powder receiving device 63.

The feeding conveyor 1 is a known mechanism having a driving and moving function, for example, a conveyor belt structure, a conveyor roller structure, a traveling carriage, etc., and may be a single mechanism or a combination of a plurality of mechanisms, as long as the conveyance of the waste wood to the primary crushing device 2 and the secondary vibrating screen 3 is achieved.

Optimally, the device also comprises a preliminary vibrating screen 7;

the primary vibrating screen 7 is arranged at the conveying end of the feeding conveying device 1, the conveying end of the feeding conveying device 1 sequentially passes through the primary vibrating screen 7, the primary crushing device 2 and the second-order vibrating screen 3, and the primary vibrating screen 7 is provided with an impurity screen 71.

The feeding and conveying device 1 of the scheme is preferably provided with the impurity screen 71 by passing through the preliminary vibration screen 7 before outputting the waste wood to the primary crushing device 2, wherein the preliminary vibration screen 7 is provided with the impurity screen 71, the impurity screen 71 is used for separating the waste wood, the waste wood can be normally conveyed to the impurity screen 71, and when the waste wood passes through the impurity screen 71, the preliminary vibration screen 7 can be started, the impurity screen 71 vibrates, so that dust, cement and other impurities on the waste wood can be directly passed through the impurity screen 71 and continuously conveyed to the direction of the primary crushing device 2, and the impurities such as dust, cement and the like vibrate to be above or below the impurity screen 71, so that the impurities are primarily separated from the waste wood, the influence of the impurities on subsequent procedures is avoided, and the treatment cost of the impurities is reduced.

Optimally, the coarse powder treatment branching 4 also comprises a coarse powder conveying air pipe 42 and a coarse powder blower 43;

The input end of the coarse powder conveying air pipe 42 is communicated with the second-order vibrating screen 3 and is positioned above the screen of the first-order screen 31, the output end of the coarse powder conveying air pipe 42 is communicated with the conveying end of the coarse powder conveying belt 41, and the coarse powder fan 43 is arranged on the coarse powder conveying air pipe 42.

The coarse powder blower 43 is provided in the coarse powder conveying air duct 42, and is configured to form a negative pressure in the coarse powder conveying air duct 42, and suck coarse powder above the first-stage screen 31 by the negative pressure, so that the coarse powder is directly or indirectly output to the coarse powder conveying belt 41, and the coarse powder conveying belt 41 outputs the coarse powder to the input end of the primary crushing device 2, and the primary crushing device 2 re-crushes the coarse powder.

Optimally, the medium powder treatment branching 5 also comprises a medium powder hopper bin 56, a medium powder conveying air pipe 57 and a medium powder fan 58;

the inner cavity of the middle powder hopper bin 56 is gradually reduced from high to low;

The input end of the medium powder conveying air pipe 57 is communicated with the second-order vibrating screen 3 and is positioned above the screen of the second-order screen 32, the medium powder blower 58 is arranged on the medium powder conveying air pipe 57, the output end of the medium powder conveying air pipe 57 is communicated with the input end above the medium powder hopper bin 56, and the output end below the medium powder hopper bin 56 is aligned with the conveying end of the medium powder conveying belt 51.

The middle powder blower 58 is arranged in the middle powder conveying air pipe 57, can form negative pressure in the middle powder conveying air pipe 57, and the middle powder conveying air pipe 57 sucks middle powder above the second-order screen 32 in the second-order vibrating screen 3, and outputs the middle powder to the input end above the middle powder funnel bin 56 through the middle powder conveying air pipe 57, and the inner cavity of the middle powder funnel bin 56 is narrowed from high to low, so that the middle powder can fall to the output end at the bottom of the middle powder funnel bin 56 along the inner cavity contour, and is intensively output to the conveying end of the middle powder conveying belt 51, and the problem that the middle powder is accumulated at the bottom of the middle powder funnel bin 56 and cannot be discharged can be prevented.

Optimally, the medium powder iron removing device 52 comprises a medium powder magnet roller 521;

The middling magnet roller 521 is in contact with or close to the conveying end of the middling conveyor belt 51.

The middle powder magnet roller 521 can be contacted with or close to the middle powder at the conveying end of the middle powder conveying belt 51, the distance between the iron of the middle powder and the middle powder magnet roller 521 is the shortest, and the iron removing effect is the best.

Optimally, the middling treatment branching 5 comprises a middling rack 59;

The secondary crushing device 53 and the middle powder fine screening device 54 are respectively arranged on the upper layer of the middle powder rack 59 from top to bottom, and the middle powder receiving device 55 is arranged on the lower layer of the middle powder rack 59;

The middle powder iron removing device 52 comprises an iron outlet pipe 522 and an iron receiving container 523;

The middle powder magnet roller 521 is positioned on the upper layer of the middle powder frame 59, the iron outlet pipe 522 is arranged on the middle powder frame 59, the input end of the iron outlet pipe 522 is positioned on the upper layer of the middle powder frame 59, and the output end of the iron outlet pipe 522 is positioned on the lower layer of the middle powder frame 59 and communicated with the iron receiving container 523 below.

The middle powder frame 59 divides the middle powder treatment branching line 5 into an upper layer and a lower layer, the gravity effect can be used for collecting secondary crushed middle powder and iron, the vertical space of a factory building is reasonably utilized, specifically, the middle powder conveying belt 51 continuously conveys the middle powder to the secondary crushing device 53 from bottom to top, the secondary crushing device 53 only needs to crush the middle powder for secondary crushing, the subsequent use of the middle powder can be met, the crushed middle powder falls to the middle powder fine screening device 54, the middle powder fine screening device 54 carries out fine screening on the crushed middle powder, the fine screened middle powder is finally output to the middle powder receiving device 55 from the lower part of the middle powder fine screening device 54, and part of oversize residues remained in the middle powder fine screening device 54 can flow back to the secondary crushing device 53 manually or in a negative pressure mode or are discarded. The input end of the iron outlet pipe 522 is positioned on the intermediate powder frame 59, and the iron absorbed by the intermediate powder magnet roller 521 can be put into the iron outlet pipe 522 in a manual or mechanical conveying mode, and the iron can be downwards output from the iron outlet pipe 522 to the lower iron receiving container 523.

Optimally, the fines disposal separation 6 further comprises a fines output conduit 64;

The upper end of the fine powder output conduit 64 is communicated with the second-order vibrating screen 3 and is positioned below the screen of the second-order screen 32, and the lower end of the fine powder output conduit 64 is butted with the conveying end of the fine powder conveying belt 61.

Since the fine powder is output below the second-order screen 32 of the second-order vibrating screen 3, the fine powder can be directly output to the fine powder conveying belt 61 through the fine powder output conduit 64 by the gravity action of the fine powder, and the fan structure provided at the fine powder output conduit 64 can be omitted.

Optimally, the fine powder treatment branching line 6 further comprises a fine powder shielding hood 65;

The fine powder shielding hood 65 is mounted on the fine powder conveying belt 61, the fine powder shielding hood 65 covers the periphery of the fine powder conveying belt 61 from the conveying start end to the fine powder iron removing device 62, and the lower end of the fine powder output conduit 64 is communicated with the fine powder shielding hood 65.

The fine powder is collected below the screen mesh of the second-order screen mesh 32, and the fine powder is easy to float in the mid-air after falling when being received by adopting gravity, so that the fine powder shielding hood 65 is arranged between the conveying start end of the fine powder conveying belt 61 and the fine powder iron removing device 62, the fine powder shielding hood 65 shields the outer side of the fine powder conveying belt 61, the fine powder can be prevented from being separated from the fine powder conveying belt 61 after being output, the loss of the fine powder is avoided, and the fine powder can finally fall to the fine powder conveying belt 61 under the action of gravity after only being scattered for a certain distance along the length direction of the fine powder shielding hood 65.

Optimally, the fine powder iron removing device 62 comprises a fine powder iron removing moving mechanism 621, a fine powder iron removing electromagnet 622 and a fine powder iron removing container 623;

The fine powder iron removing moving mechanism 621 is installed above the fine powder conveying belt 61, the fine powder iron removing container 623 is disposed beside the fine powder conveying belt 61, and an output end of the fine powder iron removing moving mechanism 621 is connected to the fine powder iron removing electromagnet 622 and is used for driving the fine powder iron removing electromagnet 622 to move, so that the fine powder iron removing electromagnet 622 moves between a conveying end of the fine powder conveying belt 61 and the fine powder iron removing container 623.

The output end of the fine powder iron removing moving mechanism 621 is movable, and can drive the fine powder iron removing electromagnet 622 to move back and forth between the conveying end of the fine powder conveying belt 61 and the fine powder iron removing container 623, meanwhile, the fine powder iron removing electromagnet 622 is an electromagnet, and has magnetic force in an electrified state, and can adsorb iron in fine powder on the fine powder conveying belt 61, after a specific time, the fine powder iron removing moving mechanism 621 drives the fine powder iron removing electromagnet 622 to move from the fine powder conveying belt 61 to the position above the fine powder iron removing container 623, and at the moment, the adsorbed iron can be output to the fine powder iron removing container 623 only by powering off the fine powder iron removing electromagnet 622, so that the iron removing function is achieved.

The fine iron removal moving mechanism 621 is a well-known mechanism having a driving moving function, for example, a combination of a cylinder, an oil cylinder, a motor and a screw, a conveyor belt structure, or the like, as long as the fine iron removal electromagnet 622 is moved.

A wood processing system is provided with the waste wood recycling powder process line.

The waste wood recycling powder process line can be applied to wood processing and used for recycling waste wood in wood processing.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.

Claims (10)

1. The waste wood recycling and pulverizing processing line is characterized by comprising a feeding conveying device, a primary crushing device, a second-order vibrating screen, a coarse powder treatment branching, a medium powder treatment branching and a fine powder treatment branching;

The feeding conveying device is used for conveying waste wood to the input ends of the first crushing device and the top of the second vibrating screen sequentially, wherein the second vibrating screen is provided with a first-order screen and a second-order screen sequentially from high to low, and the caliber of the screen of the first-order screen is larger than that of the screen of the second-order screen;

The coarse powder treatment branching line is provided with a coarse powder conveying belt, the coarse powder conveying belt is used for receiving coarse powder above the first-order screen mesh, and the conveying tail end of the coarse powder conveying belt is communicated with the input end of the primary crushing device;

The medium powder treatment branching line comprises a medium powder conveying belt, a medium powder deironing device, a secondary crushing device, a medium powder fine screening device and a medium powder receiving device;

The input end of the medium powder conveying belt receives medium powder above the second-order screen mesh, the medium powder iron removing device is arranged on the medium powder conveying belt, and the conveying tail end of the medium powder conveying belt is communicated with the input end of the secondary crushing device;

the fine powder treatment branching comprises a fine powder conveying belt, a fine powder iron removing device and a fine powder receiving device;

the fine powder receiving device comprises a fine powder conveying belt, a fine powder iron removing device, a fine powder receiving device and a fine powder conveying belt, wherein the input end of the fine powder conveying belt receives fine powder below the second-order screen through the second-order screen, the fine powder iron removing device is arranged on the fine powder conveying belt, and the conveying tail end of the fine powder conveying belt is communicated with the input end of the fine powder receiving device.

2. The waste wood recycling pulverizing line according to claim 1, further comprising a preliminary vibrating screen;

the primary vibrating screen is arranged at the conveying end of the feeding conveying device, the conveying end of the feeding conveying device sequentially passes through the primary vibrating screen, the primary crushing device and the second-order vibrating screen, and the primary vibrating screen is provided with an impurity screen.

3. The waste wood recycling pulverizing line according to claim 1, wherein the coarse powder treatment line further comprises a coarse powder transfer air pipe and a coarse powder blower;

The coarse powder conveying air pipe is characterized in that the input end of the coarse powder conveying air pipe is communicated with the second-order vibrating screen and is positioned above the screen of the first-order screen, the output end of the coarse powder conveying air pipe is communicated with the conveying end of the coarse powder conveying belt, and the coarse powder fan is arranged in the coarse powder conveying air pipe.

4. The waste wood recycling and pulverizing line according to claim 1, wherein the medium powder treatment branching line further comprises a medium powder hopper, a medium powder conveying air pipe and a medium powder blower;

The inner cavity of the middle powder hopper bin is gradually reduced from top to bottom;

The input end of the medium powder conveying air pipe is communicated with the second-order vibrating screen and is positioned above the screen of the second-order screen, the medium powder blower is arranged on the medium powder conveying air pipe, the output end of the medium powder conveying air pipe is communicated with the input end above the medium powder hopper bin, and the output end below the medium powder hopper bin is aligned with the conveying end of the medium powder conveying belt.

5. The waste wood recycling pulverizing process line according to claim 1, wherein the medium powder iron removing device comprises a medium powder magnet roller;

The medium powder magnet roller is contacted with or close to the conveying end of the medium powder conveying belt.

6. The waste wood recycling pulverizing line according to claim 5, wherein the medium powder treating line comprises a medium powder frame;

The secondary crushing device and the medium powder fine screening device are respectively arranged on the upper layer of the medium powder rack from top to bottom, and the medium powder receiving device is arranged on the lower layer of the medium powder rack;

The device for removing iron from the middle powder comprises an iron outlet pipe and an iron receiving container;

The middle powder magnet roller is positioned on the upper layer of the middle powder rack, the iron discharging pipe is arranged on the middle powder rack, the input end of the iron discharging pipe is positioned on the upper layer of the middle powder rack, and the output end of the iron discharging pipe is positioned on the lower layer of the middle powder rack and communicated with the iron receiving container below.

7. The waste wood recycling pulverizing line according to claim 1, wherein the fine powder treating line further comprises a fine powder output pipe;

The upper end of the fine powder output conduit is communicated with the second-order vibrating screen and is positioned below the screen of the second-order screen, and the lower end of the fine powder output conduit is in butt joint with the conveying end of the fine powder conveying belt.

8. The waste wood recycling pulverizing line according to claim 7, wherein the fine powder disposal line further comprises a fine powder shielding hood;

The fine powder shielding hood is arranged on the fine powder conveying belt, covers the periphery of the fine powder conveying belt between the conveying initial end and the fine powder iron removing device, and the lower end of the fine powder output guide pipe is communicated with the fine powder shielding hood.

9. The waste wood recycling pulverizing line according to claim 1, wherein the fine iron removing device comprises a fine iron removing moving mechanism, a fine iron removing electromagnet and a fine iron removing container;

The fine powder iron removing moving mechanism is arranged above the fine powder conveying belt, the fine powder iron removing container is arranged beside the fine powder conveying belt, and the output end of the fine powder iron removing moving mechanism is connected with the fine powder iron removing electromagnet and used for driving the fine powder iron removing electromagnet to move so that the fine powder iron removing electromagnet moves between the conveying end of the fine powder conveying belt and the fine powder iron removing container.

10. A wood working system, characterized in that a waste wood recycling pulverizing line according to any one of claims 1 to 9 is provided.