A waste denitration plate catalyst mesh material separation device

Abstract

The present invention belongs to the technical field of denitration catalyst recovery, and discloses a waste denitration plate catalyst mesh material separation device, comprising a feeding device, a crushing device, a material guiding device, an extrusion device and a discharging device which are sequentially arranged along the feeding to discharging direction; the crushing device cooperates with the extrusion device to perform multi-stage crushing of the denitration plate catalyst; the discharging device comprises a circulating conveying device, a strong neodymium device and a steel mesh discharging device arranged above the extrusion device, and also comprises a catalyst discharging device arranged below the extrusion device; in summary, the plate denitration catalyst is crushed into particles of a required size through a multi-stage crushing method, and then the strong neodymium device is used to separate the steel mesh and the catalyst powder in the crushed particles in a magnetic attraction manner, thereby completing the separation and recovery of the plate denitration catalyst simply and quickly; and the overall process is completed fully automatically, with the advantages of high efficiency and low labor cost.

Description

Technical Field

[0001] The invention belongs to the technical field of denitration catalyst recovery, and in particular relates to a waste denitration plate-type catalyst mesh material separation device. Background Art

[0002] At present, the application of selective catalytic reduction (SCR) in the flue gas denitrification technology of coal-fired power plants is the most extensive and mature. According to statistics, the most common commercial catalysts on the market are the V2O5-WO3 (MoO3) / TiO2 series, and during the operation of the flue gas denitrification system of the power plant, the denitrification catalyst is usually deactivated due to blockage, poisoning, and sintering. Scholars pointed out that according to the current installed capacity of domestic power plants, by 2020, the domestic waste denitrification catalyst will exceed 38,000 tons, and the number will increase year by year as time goes by. In this regard, the Ministry of Environmental Protection has issued a special document: "For waste flue gas vanadium-titanium denitrification catalysts that cannot be regenerated due to crushing and other reasons, the metal resources such as vanadium, tungsten and titanium should be recycled as much as possible to avoid polluting the environment." Therefore, the efficient resource utilization of waste denitrification catalysts can not only effectively protect the environment, but also bring significant economic and social benefits.

[0003] Generally, waste honeycomb deNOx catalysts can be ground into powder of the required particle size using a grinding machine. However, since the powder of plate-type deNOx catalysts adheres to the steel mesh, if a grinding machine is used directly, not only will the steel mesh and powder form an indistinguishable mixture, but it will also easily damage the equipment.

[0004] In view of the above reasons, it is very necessary to propose a device in the present application that can effectively separate the steel mesh from the powder. Summary of the invention

[0005] In order to solve the problems raised in the above-mentioned background technology, the purpose of the present invention is to provide a waste denitration plate catalyst mesh separation device, firstly, the plate denitration catalyst is efficiently crushed, and then the steel mesh and the catalyst powder in the crushed mixture are separated by magnetic attraction, thereby effectively realizing the separation and independent recovery of the steel mesh and the powder, saving raw materials, reducing production costs, and achieving both environmental and economic benefits.

[0006] To achieve the above object, the present invention provides the following technical solution: a waste denitration plate catalyst mesh material separation device, comprising a feeding device, a crushing device, a material guiding device, an extrusion device and a discharging device arranged in sequence from the feeding direction to the discharging direction, wherein:

[0007] The feeding device is used to feed the untreated waste denitration plate catalyst into the crushing device;

[0008] The crushing device is used to preliminarily crush untreated waste denitration plate catalyst to obtain a preliminarily crushed mixture;

[0009] The material guiding device is used to guide the preliminary crushed mixture in the crushing device into the extrusion device;

[0010] The extrusion device is used for secondary extrusion and crushing of the primary crushed mixture to obtain a target particle mixture, wherein the target particle mixture includes steel mesh particles and catalyst particles;

[0011] The discharging device includes a circulating conveyor device, a strong neodymium device and a steel mesh discharging device arranged above the extrusion device, which are used to separate the steel mesh particles in the target particle mixture and also used for automatic discharging of the steel mesh particles; the circulating conveyor device adopts a belt conveyor device, and both sides of the belt conveyor device are connected with fixed mounting plates, the strong neodymium device is fixed between the two mounting plates and is located inside the circulating conveyor device, and is used for magnetically separating the steel mesh particles in the target particle mixture, and a scraping device is connected between the circulating conveyor device and the steel mesh discharging device, and is used to scrape the steel mesh particles attached to the circulating conveyor device onto the steel mesh discharging device;

[0012] The discharging device also includes a catalyst discharging device arranged below the extrusion device, which is used for automatically discharging catalyst particles in the target particle mixture.

[0013] Optionally, the feeding device adopts a crawler feeding device, and the inclination angle of the crawler feeding device is not greater than 18°, and the feeding density is not higher than 2.5t / m 2 .

[0014] Optionally, the crushing device adopts a hammer crusher with a crushing ratio of 10-40.

[0015] Optionally, a first crushing roller, a second crushing roller and a material guide filter are provided inside the crushing device; wherein: there are two first crushing rollers, which are symmetrically located below the discharge port of the crushing device, and the two first crushing rollers include an active roller and a driven roller; there are two second crushing rollers, which are respectively located below the two first crushing rollers, and the distance between the second crushing roller and the first crushing roller is smaller than the distance between the two first crushing rollers; the material guide filter is an inverted V-shaped structure, which is arranged between the two second crushing rollers, and is used to guide the mixture with a particle size larger than the filter holes of the material guide filter to between the second crushing roller and the first crushing roller.

[0016] Optionally, the extrusion device includes an outer box, and two spiral extrusion rollers installed in the outer box, and both spiral extrusion rollers can rotate forward and backward; the top of the outer box is connected to the material guiding device, and an upper discharge port is provided at the top of the outer box on one side of the material guiding device, and the upper discharge port cooperates with the neodymium strengthening equipment; a lower discharge port is provided at the bottom of the outer box, and the lower discharge port cooperates with the catalyst discharge device.

[0017] Optionally, an inner filter box is welded inside the outer box, and two spiral extrusion rollers are both located inside the inner filter box, and the width of the upper discharge port is greater than the width of the inner filter box.

[0018] Optionally, a material guide plate is welded inside the outer box and is located below the inner filter box. The material guide plate is an inverted V-shaped structure and is tilted so that the end away from the lower discharge port is higher than the end close to the lower discharge port. Two stirring mechanisms are also symmetrically installed inside the outer box, and the two stirring mechanisms are respectively close to the two sides of the material guide plate.

[0019] Optionally, the scraper device connected between the circulating conveyor device and the steel mesh discharging device includes: a limiting plate installed between the two mounting plates and located inside the circulating conveyor device; a scraper plate installed on the steel mesh discharging device and cooperating with the limiting plate to contact the bottom of the belt on the circulating conveyor device, so as to scrape off the steel mesh particles attached to the belt.

[0020] Optionally, the steel mesh discharging device also includes a mounting frame fixed to the bottom of the scraper plate, and a belt discharging device is installed in the mounting frame, and the belt discharging device is composed of two belt rollers and a discharging belt mounted on the belt rollers.

[0021] Optionally, one side of the scraper plate is inclined and extends to a position between two belt rollers on the belt discharging device.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) In the present invention, the plate-type denitration catalyst is crushed into particles of a desired size by a multi-stage crushing method, and then the steel mesh and the catalyst powder in the crushed particles are separated by magnetic attraction in combination with a strong neodymium device, thereby completing the separation and recovery of the plate-type denitration catalyst simply and quickly;

[0024] Moreover, the whole process is fully automated, which has the advantages of high efficiency and low labor cost;

[0025] In addition, during magnetic separation, the stirring mechanism is used for stirring and vibration so that the catalyst powder attached to the steel mesh particles falls off, further ensuring the separation quality.

[0026] (2) For the above-mentioned strong neodymium equipment, a circulating conveying device and a steel mesh discharging device are provided to automatically discharge the separated steel mesh particles;

[0027] In addition, a scraping device is connected between the circulating conveying device and the steel mesh discharging device, so that the steel mesh particles on the circulating conveying device can be effectively guided to the steel mesh discharging device, thereby ensuring the effective discharging of the steel mesh particles.

[0028] (3) The above-mentioned multi-stage crushing is jointly formed by a crushing device and an extrusion device; and in the extrusion device, guide plates are arranged at multiple angles, which, on the one hand, ensure that the mixed particles after the multi-stage crushing have enough time to be magnetically separated by the strong neodymium equipment, and on the other hand, ensure that the separated catalyst powder can form a moving discharge under its own gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A simplified structural diagram of the separation device provided by the present invention;

[0030] Figure 2 It is a schematic structural diagram of a separation device in one embodiment of the present invention;

[0031] Figure 3 for Figure 2 An axial cross-sectional view of an extrusion device in the separation device shown;

[0032] Figure 4 for Figure 2 A radial cross-sectional view of an extrusion device in the separation device shown;

[0033] Figure 5 for Figure 2 The coordination diagram of the circulating conveying device and the steel mesh discharging device in the separation device shown;

[0034] Figure 6 for Figure 2 A cross-sectional view of a steel mesh discharging device in the separation device shown;

[0035] Figure 7 for Figure 2 A in the enlarged view;

[0036] In the figure: 1-feeding device, 2-crushing device, 21-first crushing roller, 22-second crushing roller, 23-material guide filter, 3-material guide device, 4-circulating conveying device, 41-mounting plate, 42-limiting plate, 5-strong neodymium equipment, 6-extrusion device, 61-outer box, 62-spiral extrusion roller, 63-inner filter box, 64-material guide plate, 65-lower discharge port, 66-upper discharge port, 67-stirring mechanism, 7-steel mesh discharge device, 71-scraper plate, 72-mounting frame, 73-belt discharge device, 8-catalyst discharge device. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the embodiment of the present invention, a waste denitration plate catalyst mesh material separation device is provided. Figure 1 As shown, the separation device mainly includes a feeding device 1, a crushing device 2, a material guiding device 3, an extrusion device 6 and a discharging device which are arranged in sequence from the feeding direction to the discharging direction, wherein:

[0039] The feeding device 1 is used to feed the untreated waste denitration plate catalyst into the crushing device 2;

[0040] The crushing device 2 is used for preliminarily crushing the untreated waste denitration plate catalyst to obtain a preliminarily crushed mixture;

[0041] The material guiding device 3 is used to guide the preliminary crushed mixture in the crushing device 2 to the extrusion device 6;

[0042] The extrusion device 6 is used for secondary extrusion and crushing of the primary crushed mixture to obtain a target particle mixture, wherein the target particle mixture includes steel mesh particles and catalyst particles;

[0043] The discharging device includes a circulating conveyor 4, a strong neodymium device 5 and a steel mesh discharging device 7 arranged above the extrusion device 6, which are used to separate the steel mesh particles in the target particle mixture and also used for automatic discharging of the steel mesh particles; the circulating conveyor 4 adopts a belt conveyor, and both sides of the belt conveyor are connected with fixed mounting plates 41, the strong neodymium device 5 is fixed between the two mounting plates 41 and is located inside the circulating conveyor 4, and is used for magnetically separating the steel mesh particles in the target particle mixture, and a scraping device is connected between the circulating conveyor 4 and the steel mesh discharging device 7, and is used to scrape the steel mesh particles attached to the circulating conveyor 4 onto the steel mesh discharging device 7;

[0044] The discharging device further comprises a catalyst discharging device 8 disposed below the extrusion device 6 and used for automatically discharging catalyst particles in the target particle mixture.

[0045] In summary, in the present invention, the working principle of the overall separation device is:

[0046] The untreated waste denitration plate catalyst is fed into the crushing device 2 through the feeding device 1, and the waste denitration plate catalyst is preliminarily crushed in the crushing device 2 to obtain a preliminarily crushed mixture, and then the preliminarily crushed mixture is guided to the extrusion device 6 through the guiding device 3, and the secondary extrusion and crushing is carried out in the extrusion device 6 to obtain a target particle mixture. During the secondary extrusion and crushing process, the discharging device is opened, wherein:

[0047] The strong neodymium device 5 produces an adsorption effect on the steel mesh particles in the target particle mixture, so that the steel mesh particles are separated from the target particle mixture and attached to the circulating conveyor 4 to be circulated along with the circulating conveyor 4. When the steel mesh particles are conveyed to the position where the scraper device is located, they will be scraped off by the scraper device to fall on the steel mesh discharging device 7, and then the steel mesh particles are discharged through the steel mesh discharging device 7;

[0048] The remaining catalyst particles in the target particle mixture fall onto the catalyst discharging device 8, and the automatic discharging is completed.

[0049] The above method effectively realizes the separation of the steel mesh and the catalyst, and can effectively realize the independent recycling of the steel mesh and the catalyst.

[0050] In addition, when performing the above operations, all equipment must be lubricated at all lubrication points before starting up; and all bolts or other fixings used for fixing must be checked for looseness.

[0051] Specifically, in combination with the above structure and principle, the separation device provided by the present invention is further explained in the following embodiments:

[0052] Embodiment 1

[0053] In this embodiment:

[0054] Regarding the feeding device 1, a crawler feeding device is used, and the inclination angle of the crawler feeding device is not greater than 18°, a sheet-based rubber belt baffle is used as a carrier, the conveying speed is 10-20 meters / minute, and the feeding density is not higher than 2.5t / m 2 .

[0055] Regarding the crushing device 2, a hammer crusher is adopted, and the hammer head of the hammer crusher is a ring-type coal crusher with a steel ring. The discharge particle size is 0-10 mm, the eccentric shaft speed can be set to 290 revolutions / minute, and the crushing ratio can be set to 10-40, which can be effectively applied to materials with a compressive strength not exceeding 150Mpa.

[0056] The material guiding device 3 comprises a material guiding fan and a material guiding pipe, wherein the material guiding pipe is made of stainless steel and has a pipe diameter of 10 cm. When guiding the material, the material guiding fan is started, and driven by the wind force of the material guiding fan, the preliminary crushed mixture enters the extrusion device 6 along the material guiding pipe.

[0057] As for the circulating conveying device 4, a belt conveying device is adopted, and its transmission belt speed can be set to 10-20 meters / minute, and the driving power is 2.2KW.

[0058] Regarding the strong neodymium device 5, its magnetic field strength can be set to 40-100 mT.

[0059] As for the extrusion device 6, a screw extruder is used, and its rotation speed can be set to 10-110 revolutions / minute, and the total power is 2.5KW. In addition, a layer of screen is provided in the extrusion device 6, and the screen diameter is 180mm and the screen gap is 0.5mm.

[0060] As for the steel mesh discharging device 7 and the catalyst discharging device 8, both adopt belt discharging devices, and the discharging speed thereof can be set to 10-20 m / min.

[0061] Embodiment 2

[0062] In this embodiment:

[0063] Regarding the crushing device 2, a first crushing roller 21, a second crushing roller 22 and a material guide filter 23 are arranged inside the crushing device 2; wherein:

[0064] There are two first crushing rollers 21, which are symmetrically located below the feeding port of the crushing device 2, and the two first crushing rollers 21 include a driving roller and a driven roller;

[0065] There are two second crushing rollers 22, which are respectively located below the two first crushing rollers 21, and the distance between the second crushing roller 22 and the first crushing roller 21 is smaller than the distance between the two first crushing rollers 21;

[0066] The material guide filter 23 is an inverted V-shaped structure, and is disposed between the two second crushing rollers 22 , and is used to guide the mixture with a particle size larger than the filter holes of the material guide filter 23 to between the second crushing roller 22 and the first crushing roller 21 .

[0067] Based on the above structure, combined with Figure 2As shown, after the waste denitration plate catalyst falls into the crushing device 2, it is first crushed by two first crushing rollers 21. The two first crushing rollers 21 rotate in opposite directions, so that the waste denitration plate catalyst is brought into the two first crushing rollers 21 to form extrusion crushing. The crushed material falls on the material guide filter 23, and the particles whose particle size is smaller than the filter holes of the material guide filter 23 pass through the material guide filter 23 and fall directly, while the particles whose particle size is larger than the filter holes of the material guide filter 23 can be guided to the position where the second crushing roller 22 is located;

[0068] The second crushing roller 22 and the corresponding first crushing roller 21 rotate in opposite directions, so that the particles that have not passed through the material guide filter 23 are brought between the second crushing roller 22 and the first crushing roller 21, thereby forming secondary crushing, thereby effectively improving the crushing effect of the overall crushing device 2.

[0069] Specifically, the moving path of the denitration plate catalyst in the crushing device 2 is as follows: Figure 2 As shown by the arrow in the crushing device 2.

[0070] Regarding the material guiding device 3, the same structure as in the first embodiment can be adopted, or a Jiaolong feeder can be adopted for feeding.

[0071] As for the circulating conveying device 4 and the neodymium strengthening device 5, the same structure as that of the first embodiment is adopted.

[0072] Regarding the extrusion device 6, it includes:

[0073] An outer box 61, and two spiral extrusion rollers 62 installed in the outer box 61 and cooperating with each other, and the two spiral extrusion rollers 62 can rotate forward and reverse;

[0074] The top of the outer box 61 is connected to the material guide device 3, and an upper discharge port 66 is provided on the top of the outer box 61 on one side of the material guide device 3, and the upper discharge port 66 cooperates with the neodymium strengthening device 5;

[0075] A lower discharge port 65 is formed at the bottom of the outer box 61 , and the lower discharge port 65 cooperates with the catalyst discharge device 8 .

[0076] Specifically, during extrusion and crushing, the two spiral extrusion rollers 62 cooperate with each other to relatively extrude and crush the preliminary crushed mixture, thereby achieving the effect of secondary crushing, and the two spiral extrusion rollers 62 can rotate forward and reverse, so that the preliminary crushed mixture can be extruded and crushed multiple times in forward and reverse directions in the extrusion device 6, so that the target particle mixture finally obtained meets the required particle size.

[0077] Furthermore, regarding the extrusion device 6, it also includes:

[0078] An inner filter box 63 is welded inside the outer box 61 , and the two spiral extrusion rollers 62 are both located inside the inner filter box 63 . The width of the upper discharge port 66 is greater than the width of the inner filter box 63 .

[0079] Based on this, the target particles that meet the particle size are discharged through the inner filter box 63, while the target particles that do not meet the particle size are subjected to multiple extrusion crushing in forward and reverse directions, effectively ensuring the crushing effect and the uniformity of the target particle mixture.

[0080] In addition, the purpose of setting the width of the upper discharge port 66 larger than the width of the inner filter box 63 is to facilitate the magnetic attraction of the steel mesh particles in the target particle mixture by the strong neodymium equipment 5 to ensure the separation effect. When separating the steel mesh particles, the steel mesh particles are discharged through the upper discharge port 66.

[0081] Furthermore, regarding the extrusion device 6, it also includes:

[0082] A guide plate 64 is welded inside the outer box 61 and is located below the inner filter box 63. The guide plate 64 is an inverted V-shaped structure and is tilted, with one end away from the lower discharge port 65 being higher than the end close to the lower discharge port 65.

[0083] Two stirring mechanisms 67 are symmetrically installed in the outer box 61 , and the two stirring mechanisms 67 are respectively close to two sides of the material guide plate 64 .

[0084] Based on this, it can be known that the guide plate 64 not only has the effect of guiding the material to both sides, but also has the effect of guiding the material to the lower discharge port 65. Specifically, when guiding the material to both sides, the target particle mixture is guided to the position where the stirring mechanism 67 is located. At this time, the stirring mechanism 67 can be started to stir and vibrate, so that the catalyst still adhering to the steel mesh particles is shaken off, thereby effectively improving the separation quality of the steel mesh particles and the catalyst particles; and, in the process of stirring and separation, based on the gravity of the target particle mixture itself and the slope of the guide plate 64, the target particle mixture will gradually move to the position where the lower discharge port 65 is located, and during the movement, the steel mesh particles are magnetically separated by the strong neodymium device 5, so only the remaining catalyst particles will fall into the lower discharge port 65, and fall onto the catalyst discharge device 8 through the lower discharge port 65, realizing automatic separation and discharge.

[0085] As a specific embodiment, the stirring mechanism 67 can be composed of a stirring shaft and stirring blades. In this embodiment, the stirring shaft and the spiral extrusion roller 62 are driven by a motor.

[0086] In this embodiment, it is worth noting that the scraping device connected between the circulating conveying device 4 and the steel mesh discharging device 7 includes:

[0087] The limiting plate 42 is installed between the two mounting plates 41 and is located inside the circulating conveying device 4;

[0088] The scraper plate 71 is installed on the steel mesh discharging device 7 and cooperates with the limit plate 42 to abut against the bottom of the belt on the circulating conveyor 4 to scrape off the steel mesh particles attached to the belt.

[0089] Based on this, when the strong neodymium device 5 is kept turned on, the steel mesh particles can also effectively fall off from the circulating conveyor 4 and fall on the steel mesh discharging device 7, so as to ensure the effective discharging of the steel mesh particles. The setting of the limit plate 42 is to ensure that the scraper plate 71 can effectively bear the force of the belt on the circulating conveyor 4 and the scraper plate 71, so as to ensure that the scraper plate 71 can effectively perform the scraping operation of the steel mesh particles.

[0090] In this embodiment, it is worth mentioning that the steel mesh discharging device 7 also includes a mounting frame 72 fixed to the bottom of the scraper plate 71, and a belt discharging device 73 is installed in the mounting frame 72. The belt discharging device 73 is composed of two belt rollers and a discharging belt mounted on the belt rollers.

[0091] Preferably, the scraper plate 71 has one side inclined and extends to a position between two belt rollers on the belt discharging device 73 .

[0092] Based on this, the scraped steel mesh particles can accurately fall onto the belt discharging device 73 along the inclined surface, and the dropping position is between the two belt rollers, thereby further improving the accuracy of the dropping.

[0093] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste denitration plate catalyst mesh material separation device, characterized in that: The invention comprises a feeding device (1), a crushing device (2), a material guiding device (3), an extruding device (6) and a discharging device which are sequentially arranged along the direction from feeding to discharging, wherein: The feeding device (1) is used to feed untreated waste denitration plate catalyst into the crushing device (2); The crushing device (2) is used to preliminarily crush untreated waste denitration plate catalyst to obtain a preliminarily crushed mixture, and the crushing device (2) is provided with a first crushing roller (21), a second crushing roller (22) and a material guide filter (23) inside; wherein: There are two first crushing rollers (21) in total, which are symmetrically located below the discharge port of the crushing device (2), and the two first crushing rollers (21) include a driving roller and a driven roller; There are two second crushing rollers (22) respectively located below the two first crushing rollers (21), and the distance between the second crushing rollers (22) and the first crushing rollers (21) is smaller than the distance between the two first crushing rollers (21); The material guide filter (23) is in an inverted V-shaped structure and is arranged between the two second crushing rollers (22) to guide the mixture with a particle size larger than the filter holes of the material guide filter (23) to between the second crushing roller (22) and the first crushing roller (21); The material guiding device (3) is used to guide the preliminary crushed mixture in the crushing device (2) into the extrusion device (6); The extrusion device (6) is used for secondary extrusion and crushing of the primary crushed mixture to obtain a target particle mixture, wherein the target particle mixture includes steel mesh particles and catalyst particles. The extrusion device (6) includes an outer box (61) and two mutually matching spiral extrusion rollers (62) installed in the outer box (61), and the two spiral extrusion rollers (62) can both rotate forward and backward; The top of the outer box (61) is connected to the material guide device (3), and an upper material discharge port (66) is provided on the top of the outer box (61) on one side of the material guide device (3), and the upper material discharge port (66) cooperates with the neodymium strengthening device (5); The bottom of the outer box (61) is provided with a lower discharge port (65), and the lower discharge port (65) cooperates with the catalyst discharge device (8); The discharging device comprises a circulating conveying device (4) arranged above the extrusion device (6), a strong neodymium device (5) and a steel mesh discharging device (7), which are used to separate the steel mesh particles in the target particle mixture and are also used for automatic discharging of the steel mesh particles; the circulating conveying device (4) adopts a belt conveying device, and both sides of the belt conveying device are connected with fixed mounting plates (41); the strong neodymium device (5) is fixed between the two mounting plates (41) and is located inside the circulating conveying device (4), and is used to magnetically separate the steel mesh particles in the target particle mixture; a scraping device is connected between the circulating conveying device (4) and the steel mesh discharging device (7), and is used to scrape the steel mesh particles attached to the circulating conveying device (4) onto the steel mesh discharging device (7); The discharging device further comprises a catalyst discharging device (8) arranged below the extrusion device (6) and used for automatically discharging catalyst particles in the target particle mixture.

2. A waste denitration plate-type catalyst mesh material separation device according to claim 1, characterized in that: The feeding device (1) adopts a crawler feeding device, and the inclination angle of the crawler feeding device is not greater than 18°, and the feeding density is not higher than 2.5t / m 2 .

3. A waste denitration plate-type catalyst mesh material separation device according to claim 1, characterized in that: The crushing device (2) adopts a hammer crusher, and the crushing ratio is 10-40.

4. A waste denitration plate-type catalyst mesh material separation device according to claim 1, characterized in that: An inner filter box (63) is welded inside the outer box (61), and the two spiral extrusion rollers (62) are both located inside the inner filter box (63), and the width of the upper discharge port (66) is greater than the width of the inner filter box (63).

5. A waste denitration plate-type catalyst mesh material separation device according to claim 4, characterized in that: A material guide plate (64) is welded inside the outer box (61), and the material guide plate (64) is located below the inner filter box (63). The material guide plate (64) is an inverted V-shaped structure, and the material guide plate (64) is tilted, with an end away from the lower discharge port (65) being higher than an end close to the lower discharge port (65); Two stirring mechanisms (67) are symmetrically installed in the outer box (61), and the two stirring mechanisms (67) are respectively close to the two sides of the material guide plate (64).

6. A waste denitration plate-type catalyst mesh material separation device according to claim 1, characterized in that: The scraping device connected between the circulating conveying device (4) and the steel mesh discharging device (7) comprises: A limiting plate (42) is installed between the two installation plates (41) and is located inside the circulating conveying device (4); A scraper plate (71) is installed on the steel mesh discharging device (7) and cooperates with a limit plate (42) to abut against the bottom of the belt on the circulating conveyor (4) to scrape off steel mesh particles attached to the belt.

7. A waste denitration plate-type catalyst mesh material separation device according to claim 6, characterized in that: The steel mesh discharging device (7) further comprises a mounting frame (72) fixed to the bottom of the scraper plate (71), and a belt discharging device (73) is installed in the mounting frame (72), wherein the belt discharging device (73) is composed of two belt rollers and a discharging belt sleeved on the belt rollers.

8. A waste denitration plate-type catalyst mesh material separation device according to claim 7, characterized in that: One side of the scraper plate (71) is arranged obliquely and extends to a position between two belt rollers on the belt discharging device (73).

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