Melamine production off-gas recovery treatment device

Abstract

The utility model belongs to tail gas recovery processing technical field, concretely speaking is melamine production tail gas recovery processing device, including bottom plate, the bottom plate top solid connection has the storage bucket with first water pump, first water pump and storage bucket are linked through pipeline, first water pump output end installation has the feed pipe, the bottom plate top solid connection has the processing jar, the feed pipe is linked with processing jar, the feed pipe end is equipped with the spray subassembly, processing jar side wall solid connection has the motor, processing jar upper rotation is connected with the pivot, pivot solid connection in motor output end, processing jar inside rotation is connected with the stirring shaft, the stirring shaft is connected with the pivot through bevel gear group transmission, through above -mentioned structure, set up motor, pivot, stirring shaft, stirring rod and discharge solenoid valve, can make the ammonium salt solution in the processing jar temporary storage, and the solution is stirred to improve the evenness of the mixing between the solution, to improve the recovery effect of ammonia element in tail gas.

Description

Technical Field

[0001] This utility model belongs to the field of exhaust gas recovery and treatment technology, specifically a melamine production exhaust gas recovery and treatment device. Background Technology

[0002] Melamine is an important organic chemical raw material, with its core use being the production of melamine-formaldehyde resin, which is applied in wood processing, coatings, and plastics. During the production of melamine, a large amount of harmful exhaust gas is generated, which needs to be treated before it can be discharged. However, some useful ammonia, nitrogen, and carbon dioxide are present in the exhaust gas, which can be recycled and reused.

[0003] When using acidic solutions to react with ammonia in exhaust gas for recovery, a spraying method is usually used. This involves contacting the exhaust gas with the sprayed solution to produce a chemical reaction and obtain an ammonium salt solution. However, when using the spraying method to recover ammonia from exhaust gas, the continuous flow of the solution results in a short reaction time between the exhaust gas and the solution, leading to uneven reaction and poor recovery efficiency.

[0004] Therefore, this utility model provides a melamine production tail gas recovery and treatment device. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides a melamine production tail gas recovery and treatment device, which solves the technical problems in the prior art.

[0006] According to one aspect, at least one embodiment of the present invention provides a melamine production tail gas recovery and treatment device, including a base plate; a storage tank and a first water pump are fixedly connected to the top of the base plate; the first water pump and the storage tank are connected through a pipeline; a feed pipe is installed at the output end of the first water pump; a treatment tank is fixedly connected to the top of the base plate; the feed pipe is connected to the treatment tank; a spray assembly is provided at the end of the feed pipe; a motor is fixedly connected to the side wall of the treatment tank; a rotating shaft is rotatably connected to the treatment tank; the rotating shaft is fixedly connected to the output end of the motor; a stirring shaft is rotatably connected inside the treatment tank; the stirring shaft and the rotating shaft are driven by a bevel gear set; and a [missing information - likely a device or equipment] is provided inside the treatment tank. The system includes a protective assembly; multiple stirring rods fixed to the stirring shaft; a reflux pipe connected to the bottom of the treatment tank; a discharge solenoid valve installed on the reflux pipe; the reflux pipe connected to a storage tank; a liquid level sensor installed in the middle of the treatment tank; an exhaust pipe installed at the top of the treatment tank; a flow diversion assembly on the top of the bottom plate; a pretreatment assembly on the top of the bottom plate; and a scraper assembly inside the bottom plate. Through the above structure, with the motor, rotating shaft, stirring shaft, stirring rods, and discharge solenoid valve, the ammonium salt solution can be temporarily stored in the treatment tank, and the solution can be stirred to improve the uniformity of mixing between solutions, thereby improving the recovery effect of ammonia from the exhaust gas.

[0007] Preferably, the spraying assembly includes a water guide pipe; the water guide pipe is installed at the end of the feed pipe; multiple water outlet pipes are connected to the water guide pipe; the water outlet pipes have a ring structure; multiple water outlets are opened on the water outlet pipes; through the above structure, by setting the water guide pipe, water outlet pipes and water outlets, the liquid medicine can be sprayed more dispersedly in the treatment tank, thereby improving the uniformity of contact between the liquid medicine and the exhaust gas.

[0008] Preferably, the pretreatment component includes a treatment box; the treatment box is fixed to the top of the base plate; a guide rail is installed inside the treatment box; a fixing plate slides within the guide rail; multiple bag filter elements are detachably installed on the fixing plate; an air inlet pipe is connected to the side wall of the treatment box; a centrifugal fan is fixed to the side wall of the treatment box; the centrifugal fan is connected to the treatment box via a pipe; an air supply pipe is fixed to the output end of the centrifugal fan; the air supply pipe is connected to the treatment tank; a sealing component is provided on the side wall of the treatment box; a fixing component and a cleaning component are provided inside the treatment box; with the above structure, the treatment box, fixing plate, air inlet pipe, centrifugal fan, and air supply pipe can filter out dust in the exhaust gas before it enters the treatment tank, thereby reducing the possibility of dust entering the treatment tank and causing blockage and contamination of the solution.

[0009] Preferably, the sealing assembly includes a sealing ring; the sealing ring is fixed to the side wall of the treatment chamber; a door is hinged to the side wall of the treatment chamber; the door and the treatment chamber are fixed by a snap lock; with the above structure, the sealing ring and the door are set, and the snap lock connects the door and the treatment chamber, which facilitates opening and closing of the treatment chamber, thereby improving the convenience of removing and cleaning the bag filter element.

[0010] Preferably, the diversion assembly includes a water supply pipe; the water supply pipe is installed on the side wall of the storage tank; a second water pump is fixedly connected to the top of the bottom plate; the output end of the second water pump is fixedly connected to a connecting pipe; the connecting pipe is connected to the feed pipe; a one-way valve is installed on both the water supply pipe and the connecting pipe; the second water pump is connected to the water supply pipe and the connecting pipe; with the above structure, the water supply pipe, the second water pump and the connecting pipe are provided, which facilitates the feeding of the storage tank into the treatment tank by the second water pump when the first water pump fails, thereby improving the continuity of exhaust gas treatment.

[0011] Preferably, the cleaning component includes a first scraper; the first scraper is fixed to the bottom of the fixed plate; with the above structure, the first scraper is connected to the fixed plate, so that when the fixed plate is removed from the processing box, the first scraper can scrape and clean the bottom of the processing box, improving the convenience of cleaning the bottom of the processing box.

[0012] Preferably, the fixing component includes a positioning hole; the positioning hole is formed on the guide rail and the fixing plate; a fixing pin is installed in the positioning hole; through the above structure, the positioning hole and the fixing pin can improve the stability of the fixing plate on the guide rail and reduce the situation where the fixing plate slides out of the guide rail when the box door is opened.

[0013] Preferably, the protective component includes a fixed cover; the fixed cover is fixed inside the processing tank; the fixed cover has a spherical structure; the fixed cover is correspondingly arranged with the bevel gear set; through the above structure, the fixed cover can provide sealing protection for the bevel gear set, thereby improving the stability of the bevel gear set operation.

[0014] Preferably, the scraping assembly includes a pair of second scrapers; the pair of second scrapers are symmetrically fixed to the middle of the stirring shaft; with the above structure, the second scrapers scrape the inner wall of the processing tank, which can reduce the material residue on the inner wall of the processing tank and improve the material collection rate.

[0015] Preferably, the bottom of the treatment tank has a conical structure; with the above structure, when the solution is discharged from the bottom of the treatment tank, the conical structure at the bottom can reduce the dead corners inside, thereby reducing the possibility of solution residue in the treatment tank.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. The melamine production tail gas recovery and treatment device of this utility model is equipped with a motor, a rotating shaft, a stirring shaft, a stirring rod and a discharge solenoid valve, which can temporarily store the ammonium salt solution in the treatment tank and stir the solution to improve the uniformity of mixing between solutions, thereby improving the recovery effect of ammonia in the tail gas.

[0018] 2. The melamine production tail gas recovery and treatment device of this utility model is equipped with a water guide pipe, a water outlet pipe and a water outlet, which can improve the uniformity of contact between the liquid and the tail gas by spraying the liquid more dispersedly into the treatment tank. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0020] Figure 1 This is a perspective view of the present invention;

[0021] Figure 2 This is a schematic diagram of the processing tank in this utility model;

[0022] Figure 3 This is a schematic diagram of the water outlet pipe in this utility model;

[0023] Figure 4 This is a schematic diagram of the cooperation structure between the storage tank and the second water pump in this utility model;

[0024] Figure 5 This is a schematic diagram of the processing box in this utility model;

[0025] Figure 6 This is a schematic diagram of the cooperation structure between the fixing plate and the scraper in this utility model.

[0026] In the diagram: 1. Base plate; 11. Storage tank; 12. First water pump; 13. Feed pipe; 14. Processing tank; 15. Motor; 16. Rotating shaft; 17. Stirring shaft; 18. Stirring rod; 19. Discharge solenoid valve; 110. Liquid level sensor; 111. Exhaust pipe; 112. Return pipe; 2. Water guide pipe; 21. Water outlet pipe; 22. Water outlet; 3. Processing box; 31. Guide rail; 32. Fixing plate; 33. Bag filter element; 34. Air inlet pipe; 35. Centrifugal fan; 36. Air supply pipe; 4. Sealing ring; 41. Box door; 5. Water supply pipe; 51. Second water pump; 52. Connecting pipe; 6. First scraper; 7. Positioning hole; 71. Fixing pin; 8. Fixing cover; 9. Second scraper. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0028] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0029] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] like Figures 1 to 6As shown, the melamine production tail gas recovery and treatment device of this utility model embodiment includes a base plate 1; a storage tank 11 and a first water pump 12 are fixedly connected to the top of the base plate 1; the first water pump 12 and the storage tank 11 are connected by a pipeline; a feed pipe 13 is installed at the output end of the first water pump 12; a treatment tank 14 is fixedly connected to the top of the base plate 1; the feed pipe 13 is connected to the treatment tank 14; a spray assembly is provided at the end of the feed pipe 13; a motor 15 is fixedly connected to the side wall of the treatment tank 14; a rotating shaft 16 is rotatably connected to the treatment tank 14; the rotating shaft 16 is fixedly connected to the output end of the motor 15; the treatment tank 14 rotates internally. A stirring shaft 17 is connected; the stirring shaft 17 and the rotating shaft 16 are driven by a bevel gear set; a protective component is provided inside the processing tank 14; multiple stirring rods 18 are fixedly connected to the stirring shaft 17; a return pipe 112 is connected to the bottom of the processing tank 14; a discharge solenoid valve 19 is installed on the return pipe 112; the return pipe 112 is connected to the storage tank 11; a liquid level sensor 110 is installed in the middle of the processing tank 14; an exhaust pipe 111 is installed on the top of the processing tank 14; a diversion component is provided on the top of the bottom plate 1; a pretreatment component is provided on the top of the bottom plate 1; a scraper component is provided inside the bottom plate 1; during operation, acid... The acidic drug solution is added to the storage tank 11 through the feeding port at the top of the storage tank 11. Then, the first water pump 12 is started to draw the drug solution from the storage tank 11 and send it into the feed pipe 13. The drug solution enters the spray assembly from the feed pipe 13 and is sprayed into the treatment tank 14. When the exhaust gas enters the treatment tank 14, it will come into contact with the drug solution, causing a chemical reaction between the exhaust gas and the acidic drug solution to generate an ammonium salt solution, which is temporarily stored at the bottom of the treatment tank 14. At this time, the motor 15 can be started to drive the rotating shaft 16, the stirring shaft 17, and the stirring rod 18 to rotate. At this time, the stirring rod 18 will stir the solution temporarily stored at the bottom of the treatment tank 14. When the liquid level rises to the level sensor 110, The discharge solenoid valve 19 will open, allowing the solution temporarily stored in the treatment tank 14 to flow back from the return pipe 112 to the storage tank 11. If the concentration of the solution is low, the solution can be circulated again to increase the concentration. If the concentration meets the standard, the solution that has flowed back into the storage tank 11 can be discharged by opening the discharge pipe valve at the bottom of the storage tank 11. Through the above structure, with the motor 15, rotating shaft 16, stirring shaft 17, stirring rod 18 and discharge solenoid valve 19, the ammonium salt solution can be temporarily stored in the treatment tank 14 and the solution can be stirred to improve the uniformity of mixing between solutions, thereby improving the recovery effect of ammonia in the tail gas.

[0034] like Figures 2 to 3As shown, the spray assembly includes a water guide pipe 2; the water guide pipe 2 is installed at the end of the feed pipe 13; multiple water outlet pipes 21 are connected to the water guide pipe 2; the water outlet pipes 21 have a ring structure; multiple water outlets 22 are opened on the water outlet pipes 21; during operation, when the liquid medicine flows out from the end of the feed pipe 13, it will be diverted from the water guide pipe 2 into the multiple water outlet pipes 21, and then sprayed out from the multiple water outlets 22 on the water outlet pipes 21. At this time, the liquid medicine can be sprayed more dispersedly in the treatment tank 14. Through the above structure, by setting the water guide pipe 2, the water outlet pipe 21 and the water outlets 22, the liquid medicine can be sprayed more dispersedly in the treatment tank 14, thereby improving the uniformity of contact between the liquid medicine and the exhaust gas.

[0035] like Figures 1 to 5 As shown, the pretreatment component includes a treatment box 3; the treatment box 3 is fixedly connected to the top of the base plate 1; a guide rail 31 is installed inside the treatment box 3; a fixing plate 32 slides inside the guide rail 31; multiple bag filter elements 33 are detachably installed on the fixing plate 32; an air inlet pipe 34 is connected to the side wall of the treatment box 3; a centrifugal fan 35 is fixedly connected to the side wall of the treatment box 3; the centrifugal fan 35 is connected to the treatment box 3 through a pipe; an air supply pipe 36 is fixedly connected to the output end of the centrifugal fan 35; the air supply pipe 36 is connected to the treatment tank 14; a sealing component is provided on the side wall of the treatment box 3; a fixing component and a cleaning component are provided inside the treatment box 3; during operation, when the exhaust gas enters the... Before entering the treatment tank 14, the bag filter element 33 is installed on the fixing plate 32. Then, the fixing plate 32 is fixed to the guide rail 31 by the fixing assembly, and the treatment box 3 is sealed by the sealing assembly. Then, the centrifugal fan 35 is started to drive the exhaust gas into the treatment box 3 from the air inlet pipe 34. Then, the dust in the exhaust gas is filtered out by multiple fixing plates 32, and then enters the treatment tank 14 from the air delivery pipe 36. Through the above structure, the treatment box 3, fixing plate 32, air inlet pipe 34, centrifugal fan 35 and air delivery pipe 36 can filter out the dust in the exhaust gas before it enters the treatment tank 14, so as to reduce the possibility of dust entering the treatment tank 14 and causing blockage and contamination of the solution.

[0036] like Figures 1 to 5As shown, the sealing assembly includes a sealing ring 4; the sealing ring 4 is fixedly connected to the side wall of the processing chamber 3; a chamber door 41 is hinged to the side wall of the processing chamber 3; the chamber door 41 is fixed to the processing chamber 3 by a snap lock; during operation, when it is necessary to clean the bag filter element 33, the snap lock between the chamber door 41 and the processing chamber 3 can be opened, and after opening the chamber door 41, the fixing plate 32 can be removed from the guide rail 31. At this time, the fixing plate 32 and the bag filter element 33 can be removed from the processing chamber 3, and then the bag filter element can be cleaned. 33. Clean the impurities adhering to it, then insert the fixing plate 32 into the guide rail 31 and fix it with the fixing component. Then close the box door 41 and lock it with the snap lock. At this time, the sealing ring 4 is located at the connection between the treatment box 3 and the box door 41 to seal. With the above structure, the sealing ring 4 and the box door 41 are set, and the box door 41 and the treatment box 3 are connected with the snap lock. This makes it easy to open and close the treatment box 3, thereby improving the convenience of taking out the bag filter element 33 for cleaning.

[0037] like Figures 1 to 4 As shown, the diversion assembly includes a water supply pipe 5; the water supply pipe 5 is installed on the side wall of the storage tank 11; a second water pump 51 is fixedly connected to the top of the base plate 1; the output end of the second water pump 51 is fixedly connected to a connecting pipe 52; the connecting pipe 52 is connected to the feed pipe 13; a one-way valve is installed on both the water supply pipe 5 and the connecting pipe 52; the second water pump 51 is connected to the water supply pipe 5 and the connecting pipe 52; during operation, when the first water pump 12 fails, the second water pump 51 can be started, and the liquid medicine in the storage tank 11 enters the water supply pipe 5, then enters the connecting pipe 52, and then enters the feed pipe 13 from the connecting pipe 52, and then enters the guide pipe 2 and the outlet pipe 21 through the feed pipe 13. With the above structure, the water supply pipe 5, the second water pump 51 and the connecting pipe 52 are set up to facilitate the feeding of the storage tank 11 into the treatment tank 14 by the second water pump 51 when the first water pump 12 fails, which can improve the continuity of exhaust gas treatment.

[0038] like Figure 6 As shown, the cleaning assembly includes a first scraper 6; the first scraper 6 is fixed to the bottom of the fixed plate 32; during operation, when the fixed plate 32 is removed, the first scraper 6 will move at the bottom of the processing box 3, and at this time the first scraper 6 will scrape the bottom of the processing box 3, thereby scraping the impurities that have fallen to the bottom of the processing box 3 to the outside of the processing box 3. Through the above structure, the first scraper 6 is connected to the fixed plate 32, so that when the fixed plate 32 is removed from the processing box 3, the first scraper 6 can scrape and clean the bottom of the processing box 3, improving the convenience of cleaning the bottom of the processing box 3.

[0039] like Figure 6As shown, the fixing component includes a positioning hole 7; the positioning hole 7 is formed on the guide rail 31 and the fixing plate 32; a fixing pin 71 is installed in the positioning hole 7; during operation, after the fixing plate 32 is inserted into the guide rail 31, the guide rail 31 and the positioning hole 7 on the fixing plate 32 are aligned, and then the fixing pin 71 is inserted into the positioning hole 7, which can fix the guide rail 31 and the fixing plate 32. When it is necessary to remove the fixing plate 32, the fixing pin 71 can be pulled upward first, so that the fixing pin 71 is dislodged from the positioning hole 7, thereby releasing the fixing of the fixing plate 32. Through the above structure, the positioning hole 7 and the fixing pin 71 can improve the stability of the fixing plate 32 on the guide rail 31 and reduce the situation where the fixing plate 32 slides out of the guide rail 31 when the box door 41 is opened.

[0040] like Figure 2 and Figure 3 As shown, the protective assembly includes a fixed cover 8; the fixed cover 8 is fixed inside the processing tank 14; the fixed cover 8 has a spherical structure; the fixed cover 8 is correspondingly arranged with the bevel gear set; during operation, when the liquid medicine is sprayed downwards inside the processing tank 14, it will pass over the fixed cover 8. At this time, the fixed cover 8 will protect the bevel gear set inside, and the spherical structure of the fixed cover 8 can guide the liquid medicine, reducing the residue of the liquid medicine on the fixed cover 8. Through the above structure, the fixed cover 8 can provide sealing protection for the bevel gear set, thereby improving the stability of the bevel gear set operation.

[0041] like Figure 2 As shown, the scraping assembly includes a pair of second scrapers 9; the pair of second scrapers 9 are symmetrically fixed in the middle of the stirring shaft 17; during operation, when the stirring shaft 17 rotates, it will drive the pair of second scrapers 9 to rotate. At this time, the second scrapers 9 will scrape the inner wall of the processing tank 14, thereby scraping off the material adhering to the inner wall of the processing tank 14. Through the above structure, the second scrapers 9 are set to scrape the inner wall of the processing tank 14, which can reduce the material residue on the inner wall of the processing tank 14 and improve the material collection rate.

[0042] like Figure 1 As shown, the bottom of the treatment tank 14 has a conical structure; with the above structure, when the solution is discharged from the bottom of the treatment tank 14, the conical structure at the bottom can reduce the dead corners inside, thereby reducing the amount of solution remaining in the treatment tank 14.

[0043] During operation, acidic solution is added to storage tank 11 through the feed port at the top. Then, the first water pump 12 is started to draw the solution from storage tank 11 and send it into feed pipe 13. The solution enters the spray assembly from feed pipe 13 and is sprayed into treatment tank 14. When exhaust gas enters treatment tank 14, it comes into contact with the solution, causing a chemical reaction between the exhaust gas and the acidic solution to generate an ammonium salt solution, which is temporarily stored at the bottom of treatment tank 14. At this time, motor 15 can be started to drive shaft 16, stirring shaft 17, and stirring rod 18 to rotate. Stirring rod 18 will stir the solution temporarily stored at the bottom of treatment tank 14. When the liquid level rises to level sensor 110, discharge solenoid valve 19 will open, allowing the solution temporarily stored in treatment tank 14 to return through return pipe 112. The solution flows into the storage tank 11. If the concentration of the solution is low, it can be circulated again to increase the concentration. If the concentration reaches the standard, the solution that has been returned to the storage tank 11 can be discharged by opening the discharge pipe valve at the bottom of the storage tank 11. When the liquid flows out from the end of the feed pipe 13, it will be diverted from the water guide pipe 2 into multiple water outlet pipes 21, and then sprayed out from multiple water outlets 22 on the water outlet pipes 21. At this time, the liquid can be sprayed more dispersedly into the treatment tank 14. Before the exhaust gas enters the treatment tank 14, the bag filter element 33 is installed on the fixing plate 32, and then the fixing plate 32 is fixed to the guide rail 31 by the fixing assembly. The treatment tank 3 is sealed by the sealing assembly. Then, the centrifugal fan 35 is started to drive the exhaust gas into the air inlet pipe 34. Inside the treatment chamber 3, the exhaust gas passes through multiple fixing plates 32 to filter out dust, and then enters the treatment tank 14 through the gas delivery pipe 36. When the bag filter element 33 needs to be cleaned, the latch lock between the chamber door 41 and the treatment chamber 3 can be opened. After opening the chamber door 41, the fixing plates 32 can be removed from the guide rail 31. At this time, the fixing plates 32 and the bag filter element 33 can be removed from the treatment chamber 3. Then the bag filter element 33 can be cleaned to remove the impurities adhering to it. Then the fixing plates 32 are inserted into the guide rail 31 and fixed by the fixing components. Then the chamber door 41 is closed and locked by the latch lock. At this time, the sealing ring 4 is located at the connection between the treatment chamber 3 and the chamber door 41 to seal. When the first water pump 12 malfunctions... When the second water pump 51 is started, the liquid medicine in the storage tank 11 enters the water delivery pipe 5, then flows into the connecting pipe 52, and then into the feed pipe 13. From there, it enters the guide pipe 2 and the outlet pipe 21. When the fixing plate 32 is removed, the first scraper 6 moves at the bottom of the processing tank 3, scraping the bottom of the tank and removing impurities. After the fixing plate 32 is inserted into the guide rail 31, the guide rail 31 aligns with the positioning hole 7 on the fixing plate 32. The fixing pin 71 is then inserted into the positioning hole 7, fixing the guide rail 31 and the fixing plate 32. To remove the fixing plate 32, the fixing pin 71 can be pulled upwards.The fixing of the fixing plate 32 can be released by disengaging the fixing pin 71 from the positioning hole 7. When the liquid medicine is sprayed downwards in the treatment tank 14, it will pass over the fixing cover 8. At this time, the fixing cover 8 will protect the internal bevel gear set, and the spherical structure of the fixing cover 8 can guide the liquid medicine and reduce the residue of the liquid medicine on the fixing cover 8. When the stirring shaft 17 rotates, it will drive a pair of second scrapers 9 to rotate. At this time, the second scrapers 9 will scrape the inner wall of the treatment tank 14, thereby scraping off the material adhering to the inner wall of the treatment tank 14.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A melamine production tail gas recovery and treatment device, comprising a base plate (1); characterized in that: A storage tank (11) and a first water pump (12) are fixedly connected to the top of the base plate (1); the first water pump (12) and the storage tank (11) are connected by a pipe; a feed pipe (13) is installed at the output end of the first water pump (12); a processing tank (14) is fixedly connected to the top of the base plate (1); the feed pipe (13) is connected to the processing tank (14); a spray assembly is provided at the end of the feed pipe (13); a motor (15) is fixedly connected to the side wall of the processing tank (14); a rotating shaft (16) is rotatably connected to the processing tank (14); the rotating shaft (16) is fixedly connected to the output end of the motor (15); a stirring shaft (17) is rotatably connected inside the processing tank (14); the... The stirring shaft (17) and the rotating shaft (16) are driven by a bevel gear set; the processing tank (14) is equipped with a protective component; multiple stirring rods (18) are fixedly connected to the stirring shaft (17); the bottom of the processing tank (14) is connected to a return pipe (112); a discharge solenoid valve (19) is installed on the return pipe (112); the return pipe (112) is connected to the storage tank (11); a liquid level sensor (110) is installed in the middle of the processing tank (14); an exhaust pipe (111) is installed on the top of the processing tank (14); a diversion component is provided on the top of the bottom plate (1); a pretreatment component is provided on the top of the bottom plate (1); a scraper component is provided inside the bottom plate (1).

2. The melamine production tail gas recovery and treatment device according to claim 1, characterized in that: The spray assembly includes a water guide pipe (2); the water guide pipe (2) is installed at the end of the feed pipe (13); multiple water outlet pipes (21) are connected to the water guide pipe (2); the water outlet pipes (21) have a ring structure; multiple water outlets (22) are opened on the water outlet pipes (21).

3. The melamine production tail gas recovery and treatment device according to claim 1, characterized in that: The pretreatment assembly includes a treatment box (3); the treatment box (3) is fixed to the top of the base plate (1); a guide rail (31) is installed inside the treatment box (3); a fixing plate (32) slides inside the guide rail (31); multiple bag filter elements (33) are detachably installed on the fixing plate (32); an air inlet pipe (34) is connected to the side wall of the treatment box (3); a centrifugal fan (35) is fixed to the side wall of the treatment box (3); the centrifugal fan (35) is connected to the treatment box (3) through a pipe; an air supply pipe (36) is fixed to the output end of the centrifugal fan (35); the air supply pipe (36) is connected to the treatment tank (14); a sealing assembly is provided on the side wall of the treatment box (3); a fixing assembly and a cleaning assembly are provided inside the treatment box (3).

4. The melamine production tail gas recovery and treatment device according to claim 3, characterized in that: The sealing assembly includes a sealing ring (4); the sealing ring (4) is fixed to the side wall of the processing box (3); the side wall of the processing box (3) is hinged with a box door (41); the box door (41) is fixed to the processing box (3) by a snap lock.

5. The melamine production tail gas recovery and treatment device according to claim 1, characterized in that: The diversion assembly includes a water supply pipe (5); the water supply pipe (5) is installed on the side wall of the storage tank (11); a second water pump (51) is fixedly connected to the top of the bottom plate (1); the output end of the second water pump (51) is fixedly connected to the connecting pipe (52); the connecting pipe (52) is connected to the feed pipe (13); a one-way valve is installed on both the water supply pipe (5) and the connecting pipe (52); the second water pump (51) is connected to the water supply pipe (5) and the connecting pipe (52).

6. The melamine production tail gas recovery and treatment device according to claim 3, characterized in that: The cleaning assembly includes a first scraper (6); the first scraper (6) is fixed to the bottom of the fixed plate (32).

7. The melamine production tail gas recovery and treatment device according to claim 3, characterized in that: The fixing component includes a positioning hole (7); the positioning hole (7) is formed on the guide rail (31) and the fixing plate (32); a fixing pin (71) is installed in the positioning hole (7).

8. The melamine production tail gas recovery and treatment device according to claim 1, characterized in that: The protective assembly includes a fixed cover (8); the fixed cover (8) is fixed inside the processing tank (14); the fixed cover (8) has a spherical structure; the fixed cover (8) is correspondingly arranged with a bevel gear set.

9. The melamine production tail gas recovery and treatment device according to claim 1, characterized in that: The scraping assembly includes a pair of second scrapers (9); the pair of second scrapers (9) are symmetrically fixed to the middle of the stirring shaft (17).

10. The melamine production tail gas recovery and treatment device according to claim 1, characterized in that: The bottom of the processing tank (14) has a conical structure.

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