Dust recovery and treatment device in compound fertilizer production process

Abstract

The utility model discloses a dust recovery and treatment device in a compound fertilizer production process, and relates to the technical field of high-tower compound fertilizer production. The device comprises a dust removal box, the dust removal box is internally divided into a dust transfer bin on the left side and a dust filtration treatment bin on the right side; the dust transfer bin and the dust filtration treatment bin are separated through a vertical partition plate fixed in the dust removal box; the upper side of the vertical partition plate is provided with a first port, and the lower side is provided with a second port; a supporting shaft is arranged in the middle of the dust transfer bin in the front-back direction. The front and rear ends of the supporting shaft are rotationally connected with the front and rear sides of the dedusting box; the supporting shaft is driven by a driving motor fixed on the outer wall of the dust removal box; a guide plate is fixedly sleeved outside the supporting shaft; the front end and the rear end of the guide plate slidably abut against the front side and the rear side in the dust transfer bin correspondingly. The tail gas dust recycling device has the beneficial effects that the process flow can be simplified, the efficiency can be improved and the cost can be reduced under the condition that the high tail gas dust recycling rate can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of high tower compound fertilizer production, in particular to a dust recovery and treatment device in the production process of compound fertilizer. Background Technique

[0002] At present, the production process of high tower melt granulation compound fertilizer mainly utilizes the characteristics that liquid ammonium nitrate or urea can form a low-temperature eutectic with materials such as monoammonium phosphate and potash fertilizers (potassium chloride, potassium sulfate). Monoammonium phosphate, potash fertilizers, etc. are added to liquid ammonium nitrate or molten urea, and a nitrogen, phosphorus, and potassium eutectic with good fluidity is formed through rapid mixing. Then, it is sprayed into a granulation tower through a special granulator (spray head). The liquid droplets exchange heat with cold air during the falling process and form spherical particles by relying on surface tension. After that, they are cooled, screened, and packaged into the warehouse after surface oil powder conditioning and wrapping. Dust will be generated during the cooling of compound fertilizer in a cooling drum and a powder cooler, screening by a drum screening machine, and wrapping oil powder by a wrapping drum. Without treatment, it will cause a too poor on-site environment and be not environmentally friendly, and also cause waste of materials.

[0003] The current dust treatment method usually intercepts large-particle material dust through a dust collector and then recycles it through a return material system. For small dust particles in the tail gas, the tail gas is washed by a water scrubbing tower to wash down the fine dust particles, and then recycled after the washing liquid reaches a certain concentration. Although this method has a high recovery rate of dust materials, the process flow is too complex, the efficiency is low, and the cost is high. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is, aiming at the above-mentioned existing technical deficiencies, to provide a dust recovery and treatment device in the production process of compound fertilizer, which can streamline the process flow, improve efficiency, and reduce costs while ensuring a relatively high recovery rate of tail gas dust.

[0005] The technical solution adopted by the utility model is: to provide a dust recovery and treatment device in the production process of compound fertilizer, including a dust removal box; the interior of the dust removal box is divided into a dust transfer bin on the left side and a dust filtering and treatment bin on the right side; the dust transfer bin and the dust filtering and treatment bin are separated by a vertical partition fixed inside the dust removal box; a first through port is opened on the upper side of the vertical partition, and a second through port is opened on the lower side;

[0006] A support shaft is arranged in the middle of the dust transfer bin along the front-back direction; the front and rear ends of the support shaft are respectively rotatably connected to the front and rear sides of the dust removal box; the support shaft is driven by a driving motor fixed on the outer wall of the dust removal box; a guiding plate is fixedly sleeved outside the support shaft; the front and rear ends of the guiding plate are respectively slidably abutted against the front and rear inner sides of the dust transfer bin; the upper and lower inner sides of the dust transfer bin are respectively arc-shaped structures; the upper and lower ends of the guiding plate are respectively slidably abutted against the upper and lower inner sides of the dust transfer bin; the left part of the upper end of the dust transfer bin is communicated with a dust inlet, and the left part of the lower end is communicated with a dust outlet;

[0007] A plurality of filtering components are distributed in the dust filtering and processing bin from left to right; each filtering component includes a vertically arranged support plate; the front and rear ends of the support plate are respectively slidably abutted against the front and rear inner sides of the dust filtering and processing bin; a circular installation opening is formed in the middle of the support plate; an annular installation frame is rotatably connected in the installation opening correspondingly; a dust filtering net is fixedly arranged inside the installation frame; a sealing insertion strip is fixed at the upper end of the support plate; a plurality of limiting insertion openings are formed at the top of the dust filtering and processing bin; the support plates pass through the limiting insertion openings one by one, and the sealing insertion strips are inserted and sealed with the limiting insertion openings one by one; the filtering aperture of the dust filtering net on the filtering component gradually decreases from left to right;

[0008] A dust suction pump and a blower are respectively fixed on the upper and lower sides of the right end of the dust removal box; the dust suction port of the dust suction pump is communicated with the upper side of the right end of the dust filtering and processing bin; the air blowing port of the blower is communicated with an exhaust air pipe; a plurality of air outlet branch pipes are communicated with the exhaust air pipe; the air outlet branch pipes are hermetically inserted into the bottom of the dust filtering and processing bin; the air outlet of each air outlet branch pipe is correspondingly directed to the lower part on the right side of the dust filtering net; a dust guiding pipe is arranged at the bottom of the dust removal box; a plurality of introducing branch pipes are communicated with the dust guiding pipe; the introducing branch pipes are correspondingly communicated with the bottom of the dust removal box and are located on the right side of each dust filtering net; the dust guiding pipe is connected to the side part of the dust outlet.

[0009] To further optimize the technical solution, a plurality of dust blocking plates are arranged on the lower side inside the dust filtering and processing bin of a dust recovery and treatment device in the compound fertilizer production process from left to right; the dust blocking plates are arranged along the left-right direction; the front and rear ends of the dust blocking plates are correspondingly fixed to the front and rear inner sides of the dust filtering and processing bin, and the leftmost dust blocking plate is correspondingly fixed to the vertical partition plate, and the rightmost dust blocking plate is correspondingly fixed to the right end of the dust filtering and processing bin; the filtering components respectively pass through the gaps between adjacent dust blocking plates.

[0010] To further optimize the technical solution, a plurality of first hatch doors are installed on the upper part of the dust filtering and processing bin of a dust recovery and treatment device in the compound fertilizer production process; the first hatch doors correspond to the side parts of the installation frames one by one; a second hatch door is installed on the lower part of the dust filtering and processing bin; the second hatch door corresponds to the space at the bottom of the dust filtering and processing bin.

[0011] To further optimize this technical solution, multiple hole seats are fixed on the top of the dust removal box of a dust recovery and treatment device during the production process of compound fertilizers; positioning holes are opened on the sealing insert; the hole seats correspond to the positioning holes one by one, and locking pins for connecting with the positioning holes are inserted into the hole seats.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. The driving motor can drive the guiding plate to rotate forward and backward, and can separate one of the dust inlet and the dust outlet so that it is not communicated with the dust filtering treatment chamber, ensuring that when sucking dust, the residual dust discharged will not be sucked back through the dust outlet, and when blowing dust, the dust will not be blown back into the compound fertilizer production equipment through the dust inlet, thus ensuring the reliability when sucking dust and blowing dust work separately.

[0014] 2. Due to the suction of the dust suction pump, the dust can be intercepted in turn by the dust filtering nets on each filtering component. The filtering aperture of the dust filtering nets on the filtering component gradually decreases from left to right, enabling the filtering precision to be improved successively, thereby ensuring a high interception rate for the dust and making the amount of dust contained in the tail gas after filtration meet the emission requirements.

[0015] 3. The air outlet of the blower is communicated with an exhaust duct, and a plurality of air outlet branch pipes are communicated with the exhaust duct. The air outlet of each air outlet branch pipe faces the lower part on the right side of the dust filtering net one by one, and can blow air from the right side to the lower part of each dust filtering net. Combining with the effect that the installation frame can rotate in the installation opening to change the acting position of the dust filtering net, the residual dust on the dust filtering net can be blown away more comprehensively, facilitating the recovery of the residual dust and the timely cleaning of the dust filtering net. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is another working state schematic diagram of the present utility model;

[0018] Figure 3 is an exploded structural diagram of the filtering component.

[0019] In the figure, 1. dust removal box; 2. dust transfer bin; 3. dust filtering treatment chamber; 4. vertical partition board; 5. first through port; 6. second through port; 7. support shaft; 8. driving motor; 9. guiding plate; 10. dust inlet; 11. dust outlet; 12. support plate; 13. installation opening; 14. installation frame; 15. dust filtering net; 16. sealing insert; 17. limiting socket; 18. dust suction pump; 19. blower; 20. exhaust duct; 21. air outlet branch pipe; 22. dust guiding pipe; 23. introduction branch pipe; 24. dust baffle; 25. first warehouse door; 26. second warehouse door; 27. hole seat; 28. positioning hole; 29. locking pin. DETAILED DESCRIPTION OF THE INVENTION

[0020] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] As Figure 1-2 shown, a dust recovery and treatment device in the production process of compound fertilizer includes a dust removal box 1; the interior of the dust removal box 1 is divided into a dust transfer bin 2 on the left side and a dust filtration treatment bin 3 on the right side; the dust transfer bin 2 and the dust filtration treatment bin 3 are separated by a vertical partition plate 4 fixed inside the dust removal box 1; a first through port 5 is opened on the upper side of the vertical partition plate 4, and a second through port 6 is opened on the lower side;

[0022] A support shaft 7 is arranged in the middle of the dust transfer bin 2 along the front-rear direction; the front and rear ends of the support shaft 7 are respectively rotatably connected to the front and rear sides of the dust removal box 1; the support shaft 7 is driven by a driving motor 8 fixed on the outer wall of the dust removal box 1; a guiding plate 9 is sleeved and fixed on the support shaft 7; the front and rear ends of the guiding plate 9 respectively slide and abut against the front and rear sides inside the dust transfer bin 2; the upper and lower sides inside the dust transfer bin 2 are respectively arc-shaped structures; the upper and lower ends of the guiding plate 9 respectively slide and abut against the upper and lower sides inside the dust transfer bin 2; the left upper part of the dust transfer bin 2 is communicated with a dust inlet 10, and the left lower part is communicated with a dust outlet 11;

[0023] As Figure 1-3 shown, a plurality of filtering components are distributed in the dust filtration treatment bin 3 from left to right; the filtering component includes a vertically arranged support plate 12; the front and rear ends of the support plate 12 respectively slide and abut against the front and rear sides inside the dust filtration treatment bin 3; a circular installation port 13 is opened in the middle of the support plate 12; a ring-shaped installation frame 14 is rotatably connected corresponding to the installation port 13; a dust filtration net 15 is fixedly arranged inside the installation frame 14; a sealing insertion strip 16 is fixed at the upper end of the support plate 12; a plurality of limiting sockets 17 are opened at the top of the dust filtration treatment bin 3; the support plate 12 passes through the limiting sockets 17 one by one, and the sealing insertion strip 16 is inserted and sealed with the limiting sockets 17 one by one; the filtering aperture of the dust filtration net 15 on the filtering component gradually decreases from left to right;

[0024] A dust suction pump 18 and a blower 19 are respectively fixed on the upper and lower sides at the right end of the dust removal box 1; the dust suction port of the dust suction pump 18 is communicated with the upper right side of the dust filtration treatment bin 3; the air blowing port of the blower 19 is communicated with an exhaust air pipe 20; a plurality of air outlet branch pipes 21 are communicated with the exhaust air pipe 20; the air outlet branch pipes 21 are hermetically inserted into the bottom of the dust filtration treatment bin 3; the air outlet of the air outlet branch pipe 21 respectively faces the lower part on the right side of the dust filtration net 15; a dust guiding pipe 22 is arranged at the bottom of the dust removal box 1; a plurality of introduction branch pipes 23 are communicated with the dust guiding pipe 22; the introduction branch pipes 23 are respectively communicated with the bottom of the dust removal box 1 and are located on the right side of each dust filtration net 15; the dust guiding pipe 22 is connected to the side part of the dust outlet 11.

[0025] It is connected to the compound fertilizer production equipment through the dust inlet 10 and to the external dust collection device through the dust outlet 11, enabling this device to filter, intercept, and recover dust.

[0026] During the dust suction operation, the guiding plate 9 is adjusted to the position as shown by the action of the driving motor 8 (a stepper reduction motor can be used). Figure 1 The negative pressure suction generated by the operation of the dust suction pump 18 acts on the compound fertilizer production equipment through the dust inlet 10. Dust can then pass through the dust transfer bin 2 into the dust filtering and treatment bin 3 in sequence and be intercepted step by step by multiple dust filtering nets 15. Since the filtering aperture of the dust filtering nets 15 on the filtering component gradually decreases from left to right, the filtering accuracy can be improved successively, ensuring a high interception rate for dust and enabling the amount of dust contained in the filtered tail gas to meet the emission requirements. Additionally, at this time, the dust outlet 11 is separated by the guiding plate 9 and is not connected to the dust filtering and treatment bin 3, so the negative pressure suction does not act on the dust outlet 11, preventing the dust discharged into the external dust collection device from being sucked back through the dust outlet 11 and ensuring the reliability of the operation.

[0027] After a long time of dust suction and interception, a relatively large amount of dust will remain on the dust filtering net 15, especially on the upper part, affecting the efficiency of filtering and intercepting dust. At this time, the installation frame 14 can be appropriately rotated (first lift the filtering component slightly from the limiting socket 17, adjust it, and then put it back), changing the dust suction position of the dust filtering net 15, adjusting the part with more residual dust on the upper part to the lower side of the dust filtering and treatment bin 3, and then adjusting the guiding plate 9 to the position as shown. Figure 2 Through the action of the fan 19, the air outlet branch pipe 21 blows air from the back of the dust filtering net 15, so that the dust on the dust filtering net 15 at the lower side position of the dust filtering and treatment bin 3 can be blown off, realizing the partial cleaning of the dust filtering net 15. Through the connection of the dust outlet 11 to the external dust collection device and the connection of the introduction branch pipe 23 to the right side part of the filtering component, the cleaned dust can be led out of the dust removal box 1.

[0028] By changing the position of the dust filtering net 15 as the installation frame 14 rotates, the cleaning of different positions of the dust filtering net 15 can be realized. By adjusting the relatively clean position of the dust filtering net 15 to the upper part of the dust filtering and treatment bin 3, the dust filtering effect of the filtering component can be guaranteed. Coupled with the timely removal of the removed dust, the long-term stable and reliable operation of this device is ensured. Moreover, the process of this device is simple. Using the dust filtering nets 15 with gradually increasing filtering accuracy to intercept dust can ensure the interception rate of dust, without the need for water washing for dust removal, reducing costs and improving efficiency.

[0029] As Figure 1-2As shown in the figure, a plurality of dust baffle plates 24 are arranged from left to right on the lower side inside the dust filtering treatment bin 3; the dust baffle plates 24 are arranged in the left-right direction; the front and rear ends of the dust baffle plates 24 are fixedly corresponding to the front and rear sides inside the dust filtering treatment bin 3, and the leftmost dust baffle plate 24 is fixedly corresponding to the vertical partition plate 4, and the rightmost dust baffle plate 24 is fixedly corresponding to the right end of the dust filtering treatment bin 3; the filtering components respectively pass through the gaps between adjacent dust baffle plates 24.

[0030] The dust baffle plates 24 can play a certain separating effect on the upper and lower parts of the dust filtering net 15, so that the dust filtering work of the dust filtering net 15 and the cleaning work of the dust filtering net 15 can be less interfered, and the respective effects can be guaranteed respectively.

[0031] As Figure 1-2 shown in the figure, a plurality of first chamber doors 25 are installed on the upper part of the dust filtering treatment bin 3; the first chamber doors 25 correspond to the side parts of the installation frame 14 one by one; a second chamber door 26 is installed on the lower part of the dust filtering treatment bin 3; the second chamber door 26 corresponds to the bottom space of the dust filtering treatment bin 3.

[0032] By opening the first chamber doors 25, the position of the dust filtering net 15 can be rotated and adjusted for the installation frame 14 without lifting the filtering components, making the operation more convenient; by opening the second chamber door 26, it is convenient to clean the bottom of the dust filtering treatment bin 3 after the device has been used for a long time.

[0033] As Figure 1-3 shown in the figure, a plurality of hole seats 27 are fixed on the top of the dust removal box 1; positioning holes 28 are formed in the sealing insert strips 16; the hole seats 27 correspond to the positioning holes 28 one by one, and locking pins 29 for connecting with the positioning holes 28 are inserted on the hole seats 27. The filtering components can be locked by the locking pins 29, so that the filtering components are ensured to be firm when the device works.

[0034] It can be understood that the present utility model is described by some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A dust recovery and treatment device in the process of compound fertilizer production, characterized by: The dust removal box (1) comprises a dust transfer bin (2) on the left and a dust filtering bin (3) on the right; the dust transfer bin (2) and the dust filtering bin (3) are separated by a vertical partition (4) fixed inside the dust removal box (1); a first opening (5) is formed on the upper side of the vertical partition (4), and a second opening (6) is formed on the lower side; A support shaft (7) is provided in the middle of the dust transfer bin (2) along the front-to-back direction; the front and rear ends of the support shaft (7) are respectively rotatably connected to the front and rear sides of the dust removal box (1); the support shaft (7) is driven by a driving motor (8) fixed to the outer wall of the dust removal box (1); a guide plate (9) is fixed to the outer shell of the support shaft (7); the front and rear ends of the guide plate (9) are respectively slidably abutted against the front and rear sides of the interior of the dust transfer bin (2); the upper and lower sides of the interior of the dust transfer bin (2) are respectively arc-shaped structures; the upper and lower ends of the guide plate (9) are respectively slidably abutted against the upper and lower sides of the interior of the dust transfer bin (2); the upper left portion of the dust transfer bin (2) is connected to a dust inlet (10), and the lower left portion is connected to a dust outlet (11); The dust filter processing chamber (3) is provided with a plurality of filter components distributed from left to right; the filter component comprises a vertically arranged support plate (12); the front and rear ends of the support plate (12) are respectively slidably abutted against the front and rear sides of the dust filter processing chamber (3); a circular mounting opening (13) is provided in the middle of the support plate (12); a ring-shaped mounting frame (14) is correspondingly rotatably connected in the mounting opening (13); a dust filter net (15) is correspondingly fixed in the mounting frame (14); a sealing insert (16) is fixed at the upper end of the support plate (12); a plurality of limiting inserts (17) are provided at the top of the dust filter processing chamber (3); the support plates (12) pass through the limiting inserts (17) one by one, and the sealing inserts (16) and the limiting inserts (17) are correspondingly plugged and sealed one by one; the filter aperture of the dust filter net (15) on the filter component gradually decreases from left to right; A dust suction pump (18) and a fan (19) are fixed to the upper and lower sides of the right end of the dust removal box (1), respectively; the dust suction port of the dust suction pump (18) is connected to the upper side of the right end of the dust filter processing chamber (3); the blowing port of the fan (19) is connected to an exhaust pipe (20); the exhaust pipe (20) is connected to a plurality of air outlet branch pipes (21); the air outlet branch pipes (21) are sealed and penetrate into the bottom of the dust filter processing chamber (3); the air outlets of the air outlet branch pipes (21) are one-to-one corresponding to the lower part of the right side of the dust filter net (15); a dust duct (22) is arranged at the bottom of the dust removal box (1); the dust duct (22) is connected to a plurality of inlet branch pipes (23); the inlet branch pipes (23) are one-to-one corresponding to the bottom of the dust removal box (1) and are located on the right side of each dust filter net (15); the dust duct (22) is connected to the side of the dust discharge port (11).

2. The dust recovery and treatment device in the compound fertilizer production process according to claim 1 is characterized in that: A plurality of dust shields (24) are arranged from left to right on the lower side of the interior of the dust filter processing bin (3); the dust shields (24) are arranged in the left-right direction; the front and rear ends of the dust shields (24) are fixed correspondingly to the front and rear sides of the interior of the dust filter processing bin (3), and the leftmost dust shield (24) is fixed correspondingly to the vertical partition (4), and the rightmost dust shield (24) is fixed correspondingly to the right end of the dust filter processing bin (3); and the filter components respectively pass through the gaps between adjacent dust shields (24).

3. The dust recovery and treatment device in the compound fertilizer production process according to claim 1 is characterized in that: A plurality of first bin doors (25) are installed on the upper part of the dust filter processing bin (3); the first bin doors (25) correspond one-to-one with the side parts of the installation frame (14); a second bin door (26) is installed on the lower part of the dust filter processing bin (3); the second bin door (26) corresponds to the bottom space of the dust filter processing bin (3).

4. The dust recovery and treatment device in the compound fertilizer production process according to claim 1 is characterized in that: A plurality of hole seats (27) are fixed on the top of the dust removal box (1); a positioning hole (28) is formed on the sealing insert (16); the hole seats (27) correspond to the positioning holes (28) one by one, and a locking pin (29) for connecting with the positioning hole (28) is inserted on the hole seat (27).

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