Crushing and recycling device for XPS extruded sheet waste

Abstract

The utility model discloses an XPS (extruded polystyrene) extruded sheet waste crushing and recycling device, which belongs to the technical field of waste recycling and comprises a crushing shell with a crushing cavity inside, the top of the crushing shell is communicated with a feed hopper, the bottom of the crushing shell is provided with a discharge port, and a grading crushing mechanism with a screening function is arranged in the crushing cavity. And meanwhile, a cooling mechanism used for controlling the temperature of the graded crushing mechanism is arranged in the crushing cavity, a granulation mechanism communicating with the discharging opening is arranged at the bottom of the crushing shell, and a waste gas treatment system is connected to the granulation mechanism. The waste material crushing device can crush waste materials in a grading manner, so that the qualified waste materials are prevented from being repeatedly crushed to generate excessive powder; and meanwhile, the crushing rollers can be cooled in the crushing process, and the temperature of the crushing rollers is prevented from being too high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of waste recovery, and specifically relates to an XPS extruded sheet waste crushing and recycling device. BACKGROUND

[0002] XPS extruded sheet is made of polystyrene foam, has low density (30-45 kg / m 3 ), high closed cell rate (>92%) and flame-retardant modification features.

[0003] Traditional waste crushing and recycling equipment relies on the shearing force between single-stage crushing rollers to crush XPS extruded sheet waste.

[0004] At the same time, the crushing roller will rub against the waste at high speed, causing local friction to heat up to 120℃, which will soften the waste and cause it to adhere to the crushing roller, and will also cause the flame retardant in the waste to decompose and release toxic gases. SUMMARY

[0005] To solve the problem of excessive powder after crushing the waste multiple times by traditional single-stage crushing rollers, and to solve the problem of local friction heating up to 120℃ caused by high-speed friction between the crushing roller and the waste, the utility model provides an XPS extruded sheet waste crushing and recycling device that can crush the waste in stages, prevent qualified waste from being crushed repeatedly and causing excessive powder, and cool the crushing roller during the crushing process to prevent the temperature of the crushing roller from being too high.

[0006] The technical solution of the utility model is as follows:

[0007] An XPS extruded sheet waste crushing and recycling device includes a crushing shell with a crushing cavity inside, a feed hopper connected to the top of the crushing shell, a discharge port provided at the bottom of the crushing shell, a grading crushing mechanism with screening function provided inside the crushing cavity, a cooling mechanism for controlling the temperature of the grading crushing mechanism provided inside the crushing cavity, a granulating mechanism provided at the bottom of the crushing shell and connected to the discharge port, and a waste gas treatment system connected to the granulating mechanism.

[0008] The further improvement of the technical scheme of the utility model lies in that the hierarchical crushing mechanism comprises a first crushing roller group arranged correspondingly to the feeding hopper and the discharging port at the upper part of the crushing cavity, and a second crushing roller group is symmetrically arranged at the lower part of the first crushing roller group in the crushing cavity.

[0009] The further improvement of the technical scheme of the utility model above lies in that the first crushing roller group comprises two first crushing rollers arranged side by side in the crushing cavity, the roll necks of the two first crushing rollers are each provided with a first gear engaged with each other, and the roll neck of any one of the first crushing rollers is provided with a first driven wheel; wherein the outer wall of the crushing shell is provided with a driving motor, and the output shaft of the driving motor is provided with a driving wheel connected to the first driven wheel through a first synchronous belt.

[0010] The further improvement of the technical scheme of the utility model above lies in that each of the second crushing roller groups comprises two second crushing rollers arranged below the first crushing roller, the roll necks of the two second crushing rollers are each provided with a second gear engaged with each other, and the roll neck of any one of the second crushing rollers is provided with a second driven wheel connected to the driving wheel through a second synchronous belt.

[0011] The further improvement of the technical scheme of the utility model lies in that the cooling mechanism comprises a water outlet pipe arranged in the crushing cavity, the water outlet pipe is provided with a spray head for spraying water mist towards the first crushing roller and the second crushing roller, and one side of the crushing cavity is provided with a cold water storage tank in communication with the water outlet pipe through a water conveying pipe; wherein the water conveying pipe comprises a main water conveying pipe in communication with a water pump arranged on the cold water storage tank, and the main water conveying pipe is in communication with the water outlet pipe through a branch water conveying pipe.

[0012] The further improvement of the technical scheme of the utility model above lies in that the first crushing roller and the second crushing roller are each provided with a cooling cavity along the length direction of the roller, and the two ends of the first crushing roller and the second crushing roller are respectively connected to a water inlet head and a water outlet head in communication with the cooling cavity; wherein the water inlet head is connected to the main water conveying pipe through the branch water conveying pipe, and the water outlet head is in communication with the cold water storage tank through a backwater pipe.

[0013] The further improvement of the technical scheme of the utility model above lies in that the side wall of the cold water storage tank is provided with a strip-shaped observation hole for observing the internal liquid level, and the top of the cold water storage tank is connected to a water adding pipe; wherein the outer wall of the cold water storage tank is provided with a refrigeration mechanism for cooling the internal fresh water.

[0014] The further improvement of the technical scheme of the utility model lies in that the waste gas treatment system comprises a gas extraction pipe connected to the granulating mechanism, and an activated carbon adsorption layer and a fan are arranged in the gas extraction pipe from inside to outside.

[0015] With the above technical scheme, the technical progress achieved by the utility model includes:

[0016] The utility model discloses a hierarchical crushing mechanism, can carry out hierarchical crushing to the XPS extruded sheet waste that enters the crushing chamber through the feed hopper, that is, after the primary crushing of waste, the crushed waste is screened, the unqualified crushed waste is secondary crushed, and the qualified crushed waste directly enters the granulating mechanism through the discharge port, preventing the overmuch powder caused by the secondary crushing of the qualified crushed waste, thereby preventing the strength of the regenerated particles from dropping; meanwhile, the cooling mechanism can cool the hierarchical crushing mechanism, preventing the softening and adhesion of the waste on the crushing roller on one hand, and preventing the thermal decomposition of the flame retardant in the waste on the other hand; the waste is directly crushed and then granulated in the granulating mechanism, compared with the separate arrangement of the crushing device and the granulating device, the time of the crushed waste entering the granulating mechanism is shortened, and the waste gas treatment system can treat the waste gas generated in the granulating mechanism, preventing air pollution.

[0017] The utility model discloses a primary crushing roller set for primary crushing of the waste, and the primary crushed waste rolls downwards along the screen, and the qualified crushed waste falls to the discharge port through the screen, preventing the secondary crushing of the qualified crushed waste; the unqualified crushed waste moves along the screen to the secondary crushing roller set for secondary crushing.

[0018] The utility model discloses a driving motor drives the driving wheel to rotate, thereby driving the primary driven wheel to rotate, finally making the two primary crushing rollers relatively rotate to primary crush the waste; when the driving wheel rotates, the secondary driven wheel is also driven to rotate, making the two secondary crushing rollers in the same group relatively rotate to secondary crush the waste; the primary crushing roller set and the secondary crushing roller set share one driving motor, which can save the number of driving motors, thereby saving the cost.

[0019] The cooling mechanism sprays water mist to the primary crushing roller and the secondary crushing roller, keeping the primary crushing roller and the secondary crushing roller at a low temperature, thereby preventing the softening and adhesion of the waste on the primary crushing roller and the secondary crushing roller on one hand, and preventing the thermal decomposition of the flame retardant in the waste on the other hand.

[0020] The utility model also can pass through the cooling water to the cooling cavity of the primary crushing roller and the secondary crushing roller, achieving the purpose of cooling the primary crushing roller and the secondary crushing roller.

[0021] In this invention, the strip-shaped observation hole allows for real-time observation of the cooling water level in the cold storage tank; the water inlet pipe facilitates the addition of cooling water to the cold storage tank; and the refrigeration mechanism cools the cooling water returning to the cold storage tank, thus facilitating its spraying onto the primary and secondary crushing rollers or its introduction into the cooling chamber. Attached Figure Description

[0022] Figure 1 and Figure 2 This is a schematic diagram of the XPS extruded board waste crushing and recycling device from different angles.

[0023] Figure 3 This is a cross-sectional structural diagram of the crushing shell of an XPS extruded board waste crushing and recycling device according to this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the protective shell and the crushing shell after separation of the XPS extruded board waste crushing and recycling device according to this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of an XPS extruded board waste crushing and recycling device after the crushing shell and the right side plate have been separated.

[0026] In the attached diagram: 1. Crushing shell; 11. Feed inlet; 12. Feed hopper; 13. Discharge outlet; 14. Protective shell; 15. Guide plate;

[0027] 2. Grading and crushing mechanism; 21. Primary crushing roller assembly; 211. Primary crushing roller; 212. Primary gear; 213. Primary driven pulley; 214. Primary synchronous belt; 22. Secondary crushing roller assembly; 221. Secondary crushing roller; 222. Secondary gear; 223. Secondary synchronous belt; 224. Secondary driven pulley; 23. Screen; 24. Drive motor; 25. Drive wheel;

[0028] 3. Cooling mechanism; 31. Water outlet pipe; 32. Spray head; 33. Cold water storage tank; 34. Main water supply pipe; 35. Branch water supply pipe; 36. Water inlet; 37. Water outlet; 38. Return water pipe;

[0029] 4. Granulation mechanism;

[0030] 5. Exhaust gas treatment system; 51. Exhaust pipe; 52. Fan. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. In the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concept of this utility model.

[0032] refer to Figure 1 and Figure 2 As can be seen, this utility model includes a crushing shell 1, which has a crushing chamber inside. A feed inlet 11 is located at the center of the top of the crushing shell 1, and a feed hopper 12 connected to the feed inlet 11 is fixedly connected to the top plate of the crushing shell 1. Meanwhile, a discharge outlet 13 is located at the center of the bottom plate of the crushing shell 1. (Continuing to refer to...) Figures 1-3 It is known that a grading and pulverizing mechanism 2 is provided inside the pulverizing chamber, and a cooling mechanism 3 is also provided inside the pulverizing chamber. The cooling mechanism 3 can control the temperature of the grading and pulverizing mechanism 2 to prevent the temperature of the grading and pulverizing mechanism 2 from becoming too high. At the same time, a granulation mechanism 4 (such as a traditional screw granulator or twin-screw granulator) is fixedly connected to the bottom of the pulverizing chamber and communicates with the discharge port 13. The outer shell of the granulation mechanism 4 is also connected to an exhaust gas treatment system 5. In order to facilitate the discharge of the pulverized waste material through the discharge port 13 to the granulation mechanism 4 after being pulverized by the grading and pulverizing mechanism 2, refer to Figure 3 It can be seen that a guide plate 15 is provided in the crushing chamber below the grading crushing mechanism 2, which is inclined towards the discharge port 13.

[0033] The grading and crushing mechanism 2 of this invention includes a primary crushing roller group 21 located on the upper side inside the crushing chamber. This primary crushing roller group 21 is located on the same vertical plane as the feed inlet 11 and the discharge outlet 13. Simultaneously, the grading and crushing mechanism 2 also includes two secondary crushing roller groups 22 located below the primary crushing roller group 21, and the two secondary crushing roller groups 22 are symmetrically arranged with the line connecting the feed inlet 11 and the discharge outlet 13 as the center line. (Reference) Figure 3 As can be seen, in this embodiment, the primary crushing roller assembly 21 includes two horizontal primary crushing rollers 211 symmetrically arranged with the line connecting the feed inlet 11 and the discharge outlet 13 as the center line; continuing to refer to Figure 3 Each set of secondary crushing rollers 22 includes two horizontal secondary crushing rollers 221.

[0034] In this embodiment, to facilitate the screening of the waste material after initial crushing and to guide the unqualified waste material into the secondary crushing roller group 22, a downwardly inclined screen 23 is provided below the primary crushing roller group 21. The angle of the screen 23 is between 10° and 30°, preferably 20°. The top of the screen 23 is located below the middle position of the two primary crushing rollers 211, and the bottom of the screen 23 is located above the middle position of the two secondary crushing rollers 221 in the same group. Simultaneously, to facilitate the separate introduction of the unqualified waste material into the two secondary crushing roller groups 22, this embodiment... Figure 3 As shown, there are two sieves 23, and the two sieves 23 are arranged in a cone shape.

[0035] To facilitate the rotation of the primary crushing roller 211 and the secondary crushing roller 221, refer to... Figure 4As can be seen, in this embodiment, the roller diameter of each primary crushing roller 211 extends through the side wall of the crushing housing 1 to the outside of the crushing housing 1. Simultaneously, a primary gear 212 is fixedly fitted (e.g., with an interference fit) on the roller diameter of the primary crushing roller 211 located outside the crushing housing 1. The primary gears 212 on two primary crushing rollers 211 mesh and connect together. Thus, driving only one primary crushing roller 211 is sufficient to make both primary crushing rollers 211 rotate simultaneously in opposite directions. (Continue referring to...) Figure 4 As can be seen, similar to the primary crushing roller 211, the roller diameter on one side of each secondary crushing roller 221 extends through the side wall of the crushing housing 1 to the outside of the crushing housing 1. At the same time, the roller diameter of the secondary crushing roller 221 located outside the crushing housing 1 is fixedly fitted with a secondary gear 222 (such as an interference fit). The secondary gears 222 on the two secondary crushing rollers 221 in the same group are meshed and connected together. In this way, only one secondary crushing roller 221 needs to be driven to make the two secondary crushing rollers 221 in the same group rotate in opposite directions at the same time.

[0036] In this embodiment, a drive motor 24 is located on the outer wall of the crushing housing 1 between the primary crushing roller group 21 and the two secondary crushing roller groups 22. The output shaft of the drive motor 24 is fixedly fitted with a drive wheel 25, and one of the two primary crushing rollers 211 is fixedly fitted with a primary driven wheel 213. The primary driven wheel 213 is connected to the drive wheel 25 through a primary synchronous belt 214. In this embodiment, one of the two secondary crushing rollers 221 in the same group is fixedly fitted with a secondary driven wheel 224. The secondary driven wheel 224 is connected to the drive wheel 25 through a secondary synchronous belt 223. To protect the workers, a protective shell 14 is detachably connected to the side wall of the crushing housing 1 by bolts. The drive motor 24, drive wheel 25, primary gear 212, secondary gear 222, primary driven wheel 213, secondary driven wheel 224, primary synchronous belt 214, and secondary synchronous belt 223 are all located inside the protective shell 14. The drive motor 24 drives the drive wheel 25 to rotate clockwise. The rotating drive wheel 25 drives the first-stage driven wheel 213 and the two second-stage driven wheels 224 to rotate clockwise at the same time, so that the two first-stage crushing rollers 211 and the two second-stage crushing rollers 221 in the same group rotate towards each other to crush the waste.

[0037] Of course, three drive motors 24 can also be provided. The primary crushing roller group 21 and the two crushing roller groups are each driven by one drive motor 24. The primary crushing roller group 21 and the two crushing roller groups are driven to rotate by their respective drive motors 24.

[0038] In this invention, the cooling mechanism 3 can cool the grading and pulverizing mechanism 2 through water mist cooling. (Reference) Figure 1 , Figure 2 and Figure 5As can be seen, in this embodiment, water mist cooling includes multiple water outlet pipes 31 located above the primary crushing roller group 21 and the secondary crushing roller group 22 on the inner wall of the crushing shell 1. Specifically, each crushing roller group has a corresponding water outlet pipe 31, and each water outlet pipe 31 is fixedly connected to multiple spray nozzles 32 that spray water mist toward the corresponding crushing roller group. To facilitate water supply to the above-mentioned water outlet pipes 31, the cooling mechanism 3 also includes a cold water storage tank 33 located on the outside of the crushing shell 1. The cold water storage tank 33 is filled with cooling water, and a water pump is provided on the outer wall of the cold water storage tank 33. The water inlet of the water pump is connected to the inside of the cold water storage tank 33, and the water outlet of the water pump is connected to the water outlet pipe 31 in sequence through the main water supply pipe 34 and the branch water supply pipe 35.

[0039] The aforementioned water mist cooling method can also be replaced by heat absorption cooling. When using heat absorption cooling, it includes cooling chambers located inside the primary crushing roller 211 and the secondary crushing roller 221, arranged along the length of the primary crushing roller 211 and the secondary crushing roller 221. Both ends of the primary crushing roller 211 and the secondary crushing roller 221 are fixedly connected to inlet heads 36 and outlet heads 37, which are connected to the cooling chambers of the corresponding crushing rollers. Meanwhile, the inlet head 36 is connected to the cold water storage tank 33 via a rotary sealing joint, a branch water pipe 35, a main water pipe 34, and a water pump. The outlet head 37 is connected to the cold water storage tank 33 via a rotary sealing joint and a return water pipe 38.

[0040] Furthermore, in this embodiment, water mist cooling and heat absorption cooling can be combined to achieve a better cooling effect on the primary crushing roller 211 and the secondary crushing roller 221.

[0041] To facilitate cooling of the cooling water in the cold water storage tank 33, a refrigeration mechanism (not shown in the figure) is connected to the cold water storage tank 33. In this embodiment, the refrigeration mechanism includes a refrigerant circulation side and a water circulation side. The refrigerant circulation side includes a semi-hermetic screw compressor → condenser → expansion valve → plate evaporator. The water circulation side includes the cold water storage tank 33 → circulating water pump → plate evaporator. The cooled water flowing out of the plate evaporator returns to the cold water storage tank 33 after cooling. The above-mentioned refrigeration mechanism can maintain the cooling water in the cold water storage tank 33 at 5-10℃.

[0042] In addition, the refrigeration mechanism described above in this embodiment can also be replaced with other industrial refrigeration machines to cool the cooling water in the cold water storage tank 33.

[0043] To facilitate observation of the cooling water level in the cold water storage tank 33, a strip-shaped observation hole and an observation window (not shown in the figure) are provided on the side wall of the cold water storage tank 33. Simultaneously, to facilitate the replenishment of cooling water into the cold water storage tank 33, a vertical water inlet pipe (not shown in the figure) is fixedly connected to the top of the cold water storage tank 33, and a water inlet switch is provided on this water inlet pipe. In this embodiment, to maintain the temperature of the cooling water in the cold water storage tank 33, the outer wall of the cold water storage tank 33 may also be covered with an insulation layer (such as insulation cotton, insulation foam, etc.).

[0044] The waste gas treatment system 5 in this invention can treat the waste gas generated in the granulation unit 4, preventing the waste gas from polluting the air. (Reference) Figure 1 and Figure 2 As can be seen, in this embodiment, the exhaust gas treatment system 5 includes an exhaust pipe 51 connected to the granulation mechanism 4. The exhaust pipe 51 has an adsorption layer (such as an activated carbon layer or other layers that can absorb exhaust gas) arranged inside it. At the same time, a fan 52 is provided at the outer end of the exhaust pipe 51, which can draw the exhaust gas generated by the granulation mechanism 4 into the exhaust pipe 51 and adsorb it through the adsorption layer.

[0045] To facilitate the repair and replacement of components inside the crushing housing 1, the top plate, bottom plate, and four side plates of the crushing housing 1 are detachably connected by bolts. Therefore, when it is necessary to repair or replace components inside the crushing housing 1, the corresponding plates can be removed for repair or replacement.

[0046] The working principle of the XPS extruded board waste crushing and recycling device in this embodiment is as follows:

[0047] Workers add waste material into the feed hopper 12. The waste material enters the primary crushing roller group 21 through the feed hopper 12 for preliminary crushing. The pre-crushed waste material falls onto the screen 23 and rolls down along the screen 23. The qualified waste material falls through the screen 23 to the discharge port 13. The unqualified waste material (i.e., the particle size is too large) rolls along the screen 23 to the secondary crushing roller group 22. The secondary crushing roller group 22 performs secondary crushing on the unqualified waste material. All the crushed waste material enters the granulation mechanism 4 through the discharge port 13. At the same time, when the granulation mechanism 4 is in use, the blower 52 works to extract the generated exhaust gas.

[0048] During the crushing of the aforementioned waste material, the cooling mechanism 3 cools down the primary crushing roller 211 and the secondary crushing roller 221, thereby preventing the high-speed friction between the crushing roller and the waste material from causing local frictional heating to 120°C. On the one hand, this prevents the waste material from softening and sticking to the crushing roller, and on the other hand, it prevents the flame retardant in the waste material from undergoing thermal decomposition.

[0049] Specifically, when using water mist for cooling, water mist can be sprayed onto the primary crushing roller and the secondary crushing roller at regular intervals (e.g., every 1 minute, spraying for 10 seconds) through the spray head 32, thereby cooling the primary crushing roller 211 and the secondary crushing roller 221.

[0050] When using heat absorption cooling, the water pump pumps the cooling water in the cold storage tank 33 into the cooling chambers of the primary crushing roller 211 and the secondary crushing roller 221 through the main water supply pipe 34 and the branch water supply pipe 35. The cooling water absorbs the heat from the primary crushing roller 211 and the secondary crushing roller 221. The cooled water after absorbing heat flows back into the cold storage tank 33, and the cooling water in the cold storage tank 33 is cooled by the refrigeration mechanism, which facilitates recycling.

[0051] Of course, to achieve a better cooling effect, water mist cooling and heat absorption cooling can be used in combination.

[0052] In the above embodiments, this utility model provides an XPS extruded board waste crushing and recycling device. The device features a graded crushing mechanism that grades and crushes XPS extruded board waste entering the crushing chamber through the feed hopper. After initial crushing, the waste is screened, and unqualified waste undergoes secondary crushing. Qualified waste directly enters the granulation mechanism through the outlet, preventing excessive powder production and resulting in poor particle size distribution, thus preventing a decrease in the strength of recycled particles. Simultaneously, the cooling mechanism cools the graded crushing mechanism, preventing the waste from softening and sticking to the crushing rollers, and preventing the thermal decomposition of flame retardants in the waste. Furthermore, the waste directly enters the granulation mechanism after crushing, shortening the time it takes for the crushed waste to enter the granulation mechanism compared to separate crushing and granulation devices. Additionally, the exhaust gas treatment system treats the exhaust gas generated in the granulation mechanism, preventing air pollution.

[0053] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention. The technical content for which protection is sought in the present invention has been fully described in the claims.

Claims

1. An XPS extruded board waste crushing and recycling device, comprising a crushing shell (1) with a crushing chamber inside, a feeding hopper (12) connected to the top of the crushing shell (1), and a discharge port (13) provided at the bottom of the crushing shell (1), characterized in that: The crushing chamber is equipped with a grading crushing mechanism (2) with screening function. At the same time, the crushing chamber is equipped with a cooling mechanism (3) for controlling the temperature of the grading crushing mechanism (2). The bottom of the crushing shell (1) is equipped with a granulation mechanism (4) connected to the discharge port (13). The granulation mechanism (4) is connected to a waste gas treatment system (5).

2. The XPS extruded board waste crushing and recycling device according to claim 1, characterized in that: The graded crushing mechanism (2) includes a primary crushing roller group (21) located at the upper part of the crushing chamber and corresponding to the feed hopper (12) and the discharge port (13). A secondary crushing roller group (22) is symmetrically arranged on both sides below the primary crushing roller group (21) in the crushing chamber. A screen (23) extending towards the secondary crushing roller group (22) is arranged in a conical shape below the primary crushing roller group (21).

3. The XPS extruded board waste crushing and recycling device according to claim 2, characterized in that: The primary crushing roller group (21) includes two primary crushing rollers (211) arranged side by side in the crushing chamber. Each of the two primary crushing rollers (211) is fitted with a meshing primary gear (212) on its roller neck, and a primary driven wheel (213) is fitted on the roller neck of any one of the primary crushing rollers (211). The outer wall of the crushing shell (1) is provided with a drive motor (24), and the output shaft of the drive motor (24) is fitted with a drive wheel (25) that is connected to the primary driven wheel (213) through a primary synchronous belt (214).

4. The XPS extruded board waste crushing and recycling device according to claim 3, characterized in that: Each of the two secondary crushing roller groups (22) includes two secondary crushing rollers (221) located below the primary crushing roller (211). The roller necks of the two secondary crushing rollers (221) are fitted with meshing secondary gears (222), and the roller neck of any one of the secondary crushing rollers (221) is fitted with a secondary driven wheel (224) connected to the driving wheel (25) via a secondary synchronous belt (223).

5. An XPS extruded board waste crushing and recycling device according to any one of claims 1-4, characterized in that: The cooling mechanism (3) includes a water outlet pipe (31) located in the crushing chamber. The water outlet pipe (31) is equipped with a spray head (32) that sprays water mist toward the first-stage crushing roller (211) and the second-stage crushing roller (221). A cold water storage tank (33) is provided on one side of the crushing chamber and is connected to the water outlet pipe (31) through a water supply pipe. The water supply pipe includes a main water supply pipe (34) connected to a water pump installed on the cold water storage tank (33). The main water supply pipe (34) is connected to the water outlet pipe (31) through a branch water supply pipe (35).

6. The XPS extruded board waste crushing and recycling device according to claim 5, characterized in that: Both the primary crushing roller (211) and the secondary crushing roller (221) have cooling chambers along their length. At the same time, the two ends of the primary crushing roller (211) and the secondary crushing roller (221) are respectively connected to a water inlet (36) and a water outlet (37) that are connected to their respective cooling chambers. The water inlet (36) is connected to the main water supply pipe (34) through a branch water supply pipe (35), and the water outlet (37) is connected to the cold water storage tank (33) through a return water pipe (38).

7. The XPS extruded board waste crushing and recycling device according to claim 6, characterized in that: The side wall of the cold water storage tank (33) is provided with a strip-shaped observation hole for observing the internal liquid level, and the top of the cold water storage tank (33) is connected to a water filling pipe; wherein, the outer wall of the cold water storage tank (33) is provided with a refrigeration mechanism for cooling the internal clean water.

8. The XPS extruded board waste crushing and recycling device according to claim 1, characterized in that: The exhaust gas treatment system (5) includes an exhaust pipe (51) connected to the granulation mechanism (4). An activated carbon adsorption layer and a fan (52) are arranged sequentially from the inside to the outside inside the exhaust pipe (51).

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