A tail gas treatment device for a urea granulation tower

Abstract

The present invention belongs to the technical field of urea granulation towers, and specifically relates to an exhaust gas treatment device for a urea granulation tower, which is characterized in that it comprises: a treatment body, which comprises a treatment shell, wherein an air inlet is provided on one side of the lower end of the treatment shell, an air outlet is provided on the upper end, and a treatment center column is fixedly installed on the middle part of the inner side; a treatment mechanism, which comprises an electrostatic dust removal unit; the problems to be solved in this scheme are that the dust removal is not thorough during spraying and filtering in the current granulation tower, the risk of secondary pollution, the difficulty in equipment maintenance and the insufficient degradation of organic matter; this scheme breaks through the single technical bottleneck by coupling the triple mechanism of electrostatic dust removal (physical) + photocatalytic oxidation (chemical) + mechanical cleaning (dynamic) through the designed treatment mechanism, rotating cleaning mechanism and spraying mechanism, and electrostatic dust removal (physical) + photocatalytic oxidation (chemical) + mechanical cleaning (dynamic). When in use, electrostatic adsorption is carried out by the cooperation of the electrostatic precipitator cathode plate and the electrostatic precipitator anode plate, and the guide extension channel of the rotating spiral blade is cooperated to ensure more sufficient adsorption treatment.

Description

Technical Field

[0001] The invention belongs to the technical field of urea granulation towers, and particularly relates to a tail gas treatment device of a urea granulation tower. Background Art

[0002] The urea granulation tower is a device for producing granular urea. The urea solution is evaporated and concentrated to above 99.5%. The resulting urea melt is pumped to the top of the granulation tower, where it is sprayed by nozzles as droplets. After contact with air in a countercurrent, it cools and solidifies into granular urea with a particle size of 0.8 to 2.5 mm. To prevent urea dust from polluting the environment, a filter or water spray wet dust removal device is installed on the top of the granulation tower.

[0003] At present, the treatment of tail gas from urea granulation tower mainly adopts wet spray dust removal or mechanical filtration technology, but it still has the following key defects:

[0004] Incomplete dust removal: Traditional spraying technology has low capture efficiency (only 60% to 70%) for micron-sized urea dust (<10μm), and is prone to forming aerosols and escaping;

[0005] Secondary pollution risk: urea-containing wastewater generated by wet dust removal requires additional treatment, increasing operating costs;

[0006] Difficult equipment maintenance: Dust easily adheres to the tower wall and electrode plates, requiring frequent shutdowns for cleaning, affecting production efficiency;

[0007] Insufficient degradation of organic matter: VOCs such as ammonia and trace formaldehyde in tail gas cannot be removed by conventional electrostatic or filtration and require subsequent combustion treatment (high energy consumption);

[0008] Therefore, it is necessary to design a tail gas treatment device for a urea granulation tower to solve the above problems. Summary of the Invention

[0009] The object of the present invention is to provide a tail gas treatment device for a urea granulation tower to solve the problems raised in the above background technology.

[0010] To achieve the above object, the present invention provides the following technical solution: a tail gas treatment device for a urea granulation tower, characterized in that it comprises:

[0011] The processing body includes a processing shell, wherein the lower end of the processing shell is provided with an air inlet, the upper end is provided with an air outlet, and the middle part of the inner side of the processing shell is fixedly installed with a processing column;

[0012] The treatment mechanism includes an electrostatic precipitator unit, including an electrostatic precipitator cathode plate fixed to the inner wall of the treatment housing and an electrostatic precipitator anode plate fixedly mounted on the surface of the treatment column, wherein the electrostatic precipitator cathode plate and the electrostatic precipitator anode plate are both annular structures and fixed by a mounting groove;

[0013] The treatment mechanism also includes a UV photocatalytic oxidation unit, including a UV photodecomposition lamp installed on the surface of the treatment column and a photocatalyst layer coated on the surface of the electrostatic precipitator anode plate, wherein the photocatalyst layer is a TiO2 nano-coating, and the electrostatic precipitator anode plate adopts a honeycomb structure;

[0014] The rotary cleaning mechanism includes a rotary seat rotatably mounted on the top of the processing column, a rotary motor driving the rotary seat, a cleaning scraper fixed to the edge of the rotary seat, and a spirally arranged rotating spiral blade, wherein the cleaning scraper rod and the rotating spiral blade are provided with a silicone scraper;

[0015] The spray mechanism includes a spray pump, a spray pipe and a spray head provided inside the treatment column, and is used for circulating and spraying the adsorbed urea particles;

[0016] The filter mechanism is installed at the upper end of the processing shell and includes a filter shell and a built-in filter element, which is used to absorb water vapor in the exhaust gas.

[0017] Preferably, an inner reinforcing frame and a connecting block are provided on the inner side of the rotating spiral blade, and a mounting slot is provided on the surface thereof to be engaged and fixed with the mounting block of the silicone scraper blade.

[0018] Preferably, the spray mechanism further comprises a filter rack provided at the lower end of the processing center column and a cleaning scraper slidably matched therewith, and the cleaning scraper is linked to the rotating seat via a cleaning connecting rod.

[0019] Preferably, an inner reinforcement column is provided inside the processing column, and the spray pipe is passed through the inner reinforcement column, with the upper end connected to the spray head and the lower end connected to the spray pump.

[0020] Preferably, a positioning frame is provided in the filter seat of the filter mechanism to fix the filter core, and the bottom is connected to the discharge port through a discharge ball valve.

[0021] Preferably, a partition plate and a top guide plate are provided on the inner side of the upper end of the processing column to optimize the airflow distribution.

[0022] Preferably, the air inlet and the air outlet are respectively provided with an air inlet fan and an air outlet fan for controlling the air flow rate.

[0023] Preferably, the wavelength of the UV light decomposition lamp is 254 nm, and it works synergistically with the TiO2 nano-coating to decompose organic matter.

[0024] Preferably, a filter outlet is provided at the upper end of the filter seat, and the position of the filter outlet corresponds to the position of the air outlet, and a filter inlet is provided at the lower end of the filter seat.

[0025] Preferably, a mounting box is fixedly mounted on the upper side of the filter housing, a rotating motor in the mounting box is connected to the rotating seat via a rotating shaft for driving the rotating seat, and a cleaning brush is fixedly mounted on the inner side of the rotating spiral blade.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. Through the designed processing mechanism, rotating cleaning mechanism and spraying mechanism, through the coupling of the triple mechanisms of electrostatic precipitator (physical) + photocatalytic oxidation (chemical) + mechanical cleaning (dynamic), a single technical bottleneck is broken through. When in use, the electrostatic precipitator cathode plate and the electrostatic precipitator anode plate are combined for electrostatic adsorption, and the guide extension channel of the rotating spiral blade ensures more sufficient adsorption treatment. The electrostatic precipitator anode plate adopts a honeycomb structure and is coated with a TiO2 / g-C3N4 composite catalyst. Under the irradiation of UV lamp, hydroxyl radicals are generated to achieve simultaneous dust adsorption and organic matter oxidation. UV photolysis replaces the traditional combustion method and there is no secondary CO2 emission.

[0028] 2. Through the designed spray mechanism, when in use, the spray liquid is extracted from the bottom of the inner side of the processing shell through the spray pump, and the dust is sprayed out through the spray head to spray and flush the dust, thereby cooperating with the electrostatic precipitator cathode plate and the electrostatic precipitator anode plate to enhance the dust removal effect.

[0029] 3. Through the designed rotating cleaning mechanism, the rotating motor drives the rotating shaft and the rotating seat to rotate during use. The rotating seat drives the cleaning scraper rod and the rotating spiral blade to rotate. The cleaning scraper rod and the silicone scraper are used to clean the surface of the treatment column and the inner wall of the treatment shell, and the spray head is used to spray to clean the adsorbed urea particles, so as to facilitate recycling and reuse.

[0030] 4. Through the designed filtering mechanism, the exhaust gas is filtered through the filter element in the filter seat, and the moisture in the gas is filtered out and discharged through the discharge ball valve and the discharge port, reducing the discharge of water vapor during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention;

[0032] Figure 2 Schematic diagram of the processing structure of the present invention;

[0033] Figure 3 It is a schematic diagram of the cleaning structure of the present invention;

[0034] Figure 4 This is a schematic diagram of the installation structure of the silicone scraper of the present invention;

[0035] Figure 5 This is a schematic diagram of the treatment column structure of the present invention;

[0036] Figure 6 This is a schematic diagram of the top guide structure of the present invention;

[0037] Figure 7This is a schematic diagram of the top buffer structure of the present invention;

[0038] Figure 8 This is a schematic diagram of the spray water absorption structure of the present invention;

[0039] Figure 9 This is a schematic diagram of the internal structure of the filter housing of the present invention;

[0040] Figure 10 It is a schematic structural diagram of the filter seat of the present invention;

[0041] Figure 11 Schematic diagram of the structure of the electrostatic precipitator anode plate of the present invention;

[0042] In the figure: 1. Processing body; 11. Processing shell; 12. Air inlet; 13. Air outlet; 14. Processing center column; 15. Air outlet fan; 16. Air inlet fan; 17. Inner reinforcement column; 18. Separator; 19. Top guide plate; 2. Filter mechanism; 21. Filter shell; 22. Filter seat; 23. Filter element; 24. Positioning frame; 25. Discharge ball valve; 26. Discharge port; 27. Filter inlet; 28. Filter outlet; 3. Rotating cleaning mechanism; 31. Mounting box; 32. Rotating motor; 33. Rotating shaft; 34. Rotating seat; 35. Cleaning scraper; 36. Rotating spiral blade; 361. Inner reinforcement frame; 362. Connecting block; 37. Silicone scraper; 371. Mounting block; 372. Mounting slot; 38. Cleaning brush; 4. Processing mechanism; 41. Electrostatic precipitator cathode plate; 42. Electrostatic precipitator anode plate; 421. Photocatalyst layer; 43. Mounting slot; 44. UV light decomposition lamp; 5. Spraying mechanism; 51. Spray head; 52. Spray pipe; 53. Spray pump; 54. Filter rack; 55. Cleaning scraper; 56. Cleaning connecting rod. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0044] Example 1: Please refer to Figures 1 to 11 The present invention provides a technical solution: a tail gas treatment device for a urea granulation tower, comprising a treatment body 1, a filtering mechanism 2 is installed at the upper end of the treatment body 1, a rotating cleaning mechanism 3 is provided in the middle of the treatment body 1, and a treatment mechanism 4 is installed inside the treatment body 1;

[0045] The treatment body 1 includes a treatment shell 11, an air inlet 12 is provided on one side of the lower end of the treatment shell 11, a filter mechanism 2 is installed on the upper end of the treatment shell 11, and an air outlet 13 is provided on one side of the filter mechanism 2. A treatment center column 14 is fixedly installed in the middle of the inner side of the treatment shell 11 by bolts, a spray mechanism 5 is provided on the inner side of the treatment center column 14, an air outlet fan 15 is installed on the inner side of the air outlet 13, and an air intake fan 16 is installed on the inner side of the air inlet 12. A partition plate 18 is provided on the inner side of the upper end of the treatment center column 14, and a top guide plate 19 is provided between the partition plates 18. When in use, the partition plate 18 and the top guide plate 19 strengthen support, thereby ensuring greater stability during use;

[0046] The treatment mechanism 4 includes an electrostatic precipitator unit and a UV photocatalytic oxidation unit, which includes an electrostatic precipitator cathode plate 41 fixed on the inner wall of the treatment shell 11 and an electrostatic precipitator anode plate 42 fixedly installed on the surface of the treatment column 14. The electrostatic precipitator anode plate 42 adopts a honeycomb structure with 200-300 holes / square inch. The inner wall of the treatment shell 11 and the surface of the treatment column 14 are provided with mounting grooves 43. The electrostatic precipitator cathode plate 41 and the electrostatic precipitator anode plate 42 are fixed in the mounting grooves 43 by screws. The surface of the treatment column 14 is fixed with a UV light decomposition lamp 44 by screws, and a photocatalyst layer 421 coated on the surface of the electrostatic precipitator anode plate 42. The photocatalyst layer is a TiO2 nano-coating. The wavelength of the UV light decomposition lamp 44 is 254nm, which synergizes with the TiO2 nano-coating to decompose organic matter. The dust cathode plate 41 and the electrostatic precipitator anode plate 42 generate electrostatic adsorption dust removal, adsorb and recover particulate matter such as urea in the exhaust gas, and at the same time, the irradiation of the UV light decomposition lamp 44 decomposes and oxidizes organic matter in the exhaust gas, converting it into low molecular compounds, water and carbon dioxide, thereby purifying the exhaust gas. The TiO2 / g-C3N4 composite catalyst with a TiO2 nano-coating on the surface generates hydroxyl radicals (·OH) under the irradiation of the UV light decomposition lamp 44 (254nm), thereby achieving simultaneous dust adsorption and organic matter oxidation. The electrostatic precipitator cathode plate 41 and the electrostatic precipitator anode plate 42 are both set to be ring-shaped, and are connected to an external power supply through a built-in connecting wire, ensuring that the electrostatic precipitator cathode plate 41 and the electrostatic precipitator anode plate 42 are more effective when in use;

[0047] From the above description, it can be seen that the present invention has the following beneficial effects: when in use, electrostatic adsorption is carried out by cooperating with the electrostatic precipitator cathode plate 41 and the electrostatic precipitator anode plate 42, and the guide extension channel of the rotating spiral blade 36 is used to ensure that the adsorption treatment is more sufficient. At the same time, when used in conjunction with the UV light decomposition lamp 44, the purpose of simultaneous electrostatic adsorption and photocatalytic oxidation can be achieved, so that the urea dust is directly degraded into CO2 and H2O after being adsorbed, avoiding secondary accumulation.

[0048] Further, see Figures 1 to 11 The rotating cleaning mechanism 3 includes a rotating seat 34 rotatably mounted on the top of the processing column 14 and an installation box 31 fixedly mounted on the top of the filtering mechanism 2. A rotating motor 32 is fixedly mounted on the inner side of the installation box 31. The rotating motor 32 is fixedly mounted with a rotating shaft 33 through an output shaft. One end of the rotating shaft 33 is fixedly mounted to the rotating seat 34 by bolts. A cleaning scraper 35 is fixedly mounted on the edge of the rotating seat 34 by bolts. A rotating spiral piece 36 is provided on the outer side of the cleaning scraper 35. A silicone scraper 37 is provided on the inner side of the cleaning scraper 35 and the outer side of the rotating spiral piece 36. A cleaning brush piece 38 is fixedly mounted on the inner side of the rotating spiral piece 36. The rotating motor 32 drives the rotating shaft 33 and the rotating seat 34 to rotate, and the rotating seat 34 drives the cleaning scraper 35 and the rotating spiral piece 36 to rotate. As the blade 36 rotates, the particles adsorbed on the inner wall of the processing shell 11 and the surface of the processing column 14 are scraped off through the cleaning scraper rod 35 and the silicone scraper 37; an inner reinforcing frame 361 is fixedly installed on the inner side of the rotating spiral blade 36, and a connecting block 362 is fixedly installed on one side of the inner reinforcing frame 361, and one end of the connecting block 362 is fixed on the cleaning scraper rod 35. When in use, the inner reinforcing frame 361 is used to ensure that the rotating spiral blade 36 will not be deformed, and the connecting block 362 is used to strengthen the connection between the rotating spiral blade 36 and the cleaning scraper rod 35; a mounting groove 372 is provided on the surface of the rotating spiral blade 36, and a mounting block 371 is provided on the inner side of the silicone scraper 37, which is embedded in the mounting groove 372, which ensures that the silicone scraper 37 is fixed more stably during installation.

[0049] The rotary cleaning mechanism 3 adopts the above technical solution. When in use, the rotary motor 32 drives the rotary shaft 33 and the rotary seat 34 to rotate, and the rotary seat 34 drives the cleaning scraper 35 and the rotating spiral piece 36 to rotate. The cleaning scraper 35 and the silicone scraper 37 are used to clean the surface of the processing column 14 and the inner wall of the processing shell 11, and the spray head 51 is used to spray to clean the adsorbed urea particles, thereby facilitating recycling and reuse.

[0050] Example 2: Please refer to Figures 1 to 11As shown, on the basis of embodiment 1, the present invention provides a technical solution: an inner reinforcing column 17 is installed inside the processing column 14, and the inner reinforcing column 17 is fixedly connected to the processing column 14 through a support block. The spray mechanism 5 includes a spray pump 53 installed at the bottom of the inner side of the processing column 14, a spray pipe 52 installed inside the inner reinforcing column 17 and a spray head 51 installed on the processing column 14. Both ends of the spray pipe 52 are connected to the spray head 51 and the spray pump 53. The spray liquid is drawn out from the bottom of the inner side of the processing shell 11 through the operation of the spray pump 53, and is sprayed out through the spray pipe 52 and the spray head 51 for spraying. While washing the particles with water, the urea scraped off the inner wall of the treatment shell 11 and the surface of the treatment column 14 is washed down; a filter rack 54 is fixedly installed on the outer side of the lower end of the treatment column 14, and one end of the spray pump 53 is connected to the inner side of the filter rack 54. The filter rack 54 filters the spray liquid and extracts it for use again; a cleaning scraper 55 is slidably installed on the outer side of the filter rack 54, and a cleaning connecting rod 56 is fixedly installed on the upper side of the cleaning scraper 55 by screws. The upper end of the cleaning connecting rod 56 is fixedly connected to the rotating seat 34 by bolts. The cleaning scraper 35 rotates to drive the cleaning connecting rod 56 and the cleaning scraper 55 to clean the surface of the filter rack 54;

[0051] The spray mechanism 5 using the above technical solution draws spray liquid from the bottom inside the processing shell 11 through the spray pump 53 when in use, and sprays the dust through the spray head 51 to spray and flush the dust, thereby cooperating with the electrostatic precipitator cathode plate 41 and the electrostatic precipitator anode plate 42 to enhance the dust removal effect.

[0052] Further, see Figures 1 to 11 The filter mechanism 2 includes a filter housing 21 fixedly mounted on the processing housing 11 by bolts and a filter seat 22 installed in the filter housing 21. The installation box 31 and the rotating motor 32 are installed on the filter housing 21, and the rotating shaft 33 is installed in the filter housing 21. The lower end of the filter seat 22 is connected to the interior of the processing housing 11 and is equipped with a discharge ball valve 25 and a discharge port 26. The upper end of the filter seat 22 is provided with a filter outlet 28, and the position of the filter outlet 28 corresponds to the position of the air outlet 13. The lower end of the filter seat 22 is provided with a filter inlet 27. When in use, the exhaust gas after spraying and adsorption enters the inner side of the filter seat 22 through the filter inlet 27 and is adsorbed by the filter element 23, thereby adsorbing water vapor and discharging it through the filter outlet 28; a positioning frame 24 is fixedly mounted on the inner side of the filter seat 22 by screws, and a filter element 23 is provided on the inner side of the positioning frame 24. The discharge port 26 is connected to the lower end of the filter element 23 through the discharge ball valve 25, which is convenient for installing and using the filter element 23 when in use, ensuring that the filter element 23 is installed more stably.

[0053] The filter mechanism 2 adopts the above technical solution, filters the discharged gas through the filter element 23 in the filter seat 22, and at the same time filters out the moisture in the gas, and discharges it through the discharge ball valve 25 and the discharge port 26, thereby reducing the discharge of water vapor during use.

[0054] The working principle and use process of the present invention are as follows: when in use, the air inlet 12 is connected to the exhaust port of the urea granulation tower, and the exhaust gas is allowed to enter the treatment shell 11 by cooperating with the blower and the air inlet fan 16. The exhaust gas is guided to flow by the rotating spiral blade 36 outside the treatment column 14, and the electrostatic adsorption dust removal generated by the electrostatic precipitator cathode plate 41 and the electrostatic precipitator anode plate 42 is used to adsorb and recover particulate matter such as urea in the exhaust gas. At the same time, the irradiation of the UV light decomposition lamp 44 decomposes and oxidizes the organic matter in the exhaust gas, converting it into low molecular compounds, water and carbon dioxide, thereby achieving the purification of the exhaust gas. At the same time, the rotating motor 32 drives the rotating shaft 33 and the rotating seat 34 to rotate, and the rotating seat 34 drives the cleaning scraper 35 and the rotating spiral blade 36 to rotate. The particles adsorbed on the inner wall of the treatment shell 11 and the surface of the treatment center column 14 are scraped off by the silicone scraper 37, guided to fall by the rotating spiral blade 36, and drawn out from the bottom inner side of the treatment shell 11 by the spray pump 53, and sprayed out through the spray pipe 52 and the spray head 51 for spraying. While washing the residual particles in the exhaust gas with water, the urea scraped off the inner wall of the treatment shell 11 and the surface of the treatment center column 14 is washed down, and at the same time, the filter rack 54 filters the spray liquid and extracts it for use again, and the cleaning scraper rod 35 rotates to drive the cleaning connecting rod 56 and the cleaning scraper rack 55 to clean the surface of the filter rack 54, thereby ensuring that it is more convenient to extract the spray liquid. The exhaust gas after spray adsorption is adsorbed by the filter element 23 in the filter seat 22, and then discharged through the filter outlet 28 and the air outlet 13.

[0055] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0056] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A tail gas treatment device for a urea granulation tower, characterized in that: include: A processing body (1) includes a processing shell (11), an air inlet (12) is provided on one side of the lower end of the processing shell (11), an air outlet (13) is provided on the upper end, and a processing center column (14) is fixedly installed in the middle of the inner side; A treatment mechanism (4) includes an electrostatic precipitator unit, including an electrostatic precipitator cathode plate (41) fixed to the inner wall of a treatment housing (11) and an electrostatic precipitator anode plate (42) fixedly mounted on the surface of a treatment column (14), wherein the electrostatic precipitator cathode plate (41) and the electrostatic precipitator anode plate (42) are both annular structures and are fixed by a mounting groove (43); The treatment mechanism (4) further includes a UV photocatalytic oxidation unit, including a UV photodecomposition lamp (44) installed on the surface of the treatment column (14) and a photocatalyst layer (421) coated on the surface of the electrostatic precipitator anode plate (42), wherein the photocatalyst layer is a TiO2 nano-coating, and the electrostatic precipitator anode plate (42) adopts a honeycomb structure; A rotary cleaning mechanism (3) comprises a rotary seat (34) rotatably mounted on the top of the processing column (14), a rotary motor (32) driving the rotary seat (34), a cleaning scraper (35) fixed to the edge of the rotary seat (34), and a spirally arranged rotating spiral piece (36), wherein a silicone scraper (37) is provided on the cleaning scraper (35) and the rotating spiral piece (36); A spray mechanism (5) comprising a spray pump (53), a spray pipe (52) and a spray head (51) arranged inside the treatment column (14), for circulated spraying of the adsorbed urea particles; A filter mechanism (2) is mounted on the upper end of the processing housing (11), comprising a filter housing (21) and a built-in filter element (23), for absorbing water vapor in the exhaust gas; An inner reinforcing frame (361) and a connecting block (362) are provided on the inner side of the rotating spiral blade (36), and a mounting slot (372) is provided on the surface thereof for engaging and fixing with the mounting block (371) of the silicone scraper (37); The spray mechanism (5) further includes a filter rack (54) provided at the lower end of the processing center column (14) and a cleaning scraper (55) slidably engaged therewith, the cleaning scraper (55) being linked to the rotating seat (34) via a cleaning connecting rod (56); An inner reinforcement column (17) is provided inside the treatment column (14), a spray pipe (52) is passed through the inner reinforcement column (17), and the upper end of the spray pipe (52) is connected to the spray head (51) and the lower end is connected to the spray pump (53); A partition plate (18) and a top guide plate (19) are provided on the inner side of the upper end of the processing center column (14) for optimizing airflow distribution; A mounting box (31) is fixedly mounted on the upper side of the filter housing (21). A rotating motor (32) in the mounting box (31) is connected to a rotating seat (34) via a rotating shaft (33) for driving the rotating seat (34). A cleaning brush (38) is fixedly mounted on the inner side of the rotating spiral sheet (36).

2. The tail gas treatment device of the urea granulation tower according to claim 1, characterized in that: A positioning frame (24) is provided in the filter seat (22) of the filter mechanism (2) to fix the filter core (23), and the bottom is connected to the discharge port (26) through the discharge ball valve (25).

3. The tail gas treatment device of the urea granulation tower according to claim 1, characterized in that: The air inlet (12) and the air outlet (13) are respectively provided with an air inlet fan (16) and an air outlet fan (15) for controlling the air flow rate.

4. The tail gas treatment device of the urea granulation tower according to claim 1, characterized in that: The UV light decomposition lamp (44) has a wavelength of 254 nm and works synergistically with the TiO2 nano-coating to decompose organic matter.

5. The tail gas treatment device of the urea granulation tower according to claim 2, characterized in that: A filter outlet (28) is provided at the upper end of the filter seat (22), and the position of the filter outlet (28) corresponds to the position of the air outlet (13). A filter inlet (27) is provided at the lower end of the filter seat (22).

Images