CN112473552B - Dust separation and collection system of prilling tower - Google Patents
Dust separation and collection system of prilling tower Download PDFInfo
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- CN112473552B CN112473552B CN202011285461.XA CN202011285461A CN112473552B CN 112473552 B CN112473552 B CN 112473552B CN 202011285461 A CN202011285461 A CN 202011285461A CN 112473552 B CN112473552 B CN 112473552B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
- B01D46/2414—End caps including additional functions or special forms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/4227—Manipulating filters or filter elements, e.g. handles or extracting tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
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Abstract
The invention discloses a dust separation and collection system of a prilling tower, which comprises a urea prilling tower, wherein two ends of the urea prilling tower are respectively and fixedly connected with a collection box, a driving assembly and an extrusion assembly are fixedly arranged inside the collection box, a spray header is embedded into the top of the inner wall of the collection box in a penetrating manner, a discharge assembly is fixedly arranged at the bottom of the collection box, and a recovery box is detachably arranged at one end of the urea prilling tower corresponding to the discharge assembly. According to the invention, the water absorption sponge is soaked by the spray header, the flue gas drives the transmission shaft to rotate through the fan blades in the driving pipe, when the flue gas penetrates through the through hole and the water absorption sponge is discharged outwards, the urea dust is dissolved in the water absorption sponge, the transmission shaft drives the fixed support to rotatably match the telescopic rod, the damping spring, the fixed support and the rotating roller, and the water in the water absorption sponge is extruded and dropped to the bottom of the collecting box to complete dust separation and recovery, so that the purposes of thorough separation of gas and urea dust and high recovery rate can be realized.
Description
Technical Field
The invention relates to the technical field of dust recovery equipment for urea production, in particular to a dust separation and collection system of a prilling tower.
Background
At present, in most chemical fertilizer production enterprises, tail gas of a urea prilling tower is usually carried with non-negligible urea dust and ammonia gas, and urea dust and ammonia which are easy to dissolve in water and a condensate which is not easy to dissolve in water exist. Some manufacturers reform 20 ten thousand tons of urea per year on the basis of 4 ten thousand tons of urea per year, the quality of harmful substances such as dust and the like discharged by a prilling tower is continuously increased along with the expansion of production, the dust concentration of tail gas is generally 300-700 mg/Nm < 3 >, and the environmental pollution is increasingly serious; in general, a 20 ten thousand ton granulation tower produced every year can pollute the environment with the radius of 6Km, and form an atmospheric environment with strong corrosion.
However, in the prior art, when the dust recovery device is actually used, the dust recovery efficiency of the traditional dust recovery device for urea production is low, and the separation of gas and dust is not thorough, so that the dust pollution on a production site is serious.
Disclosure of Invention
The invention aims to provide a dust separation and collection system of a prilling tower, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the urea granulation tower comprises a urea granulation tower, collecting boxes are fixedly connected to two ends of the urea granulation tower, a driving assembly and an extrusion assembly are fixedly arranged in each collecting box, a spray header penetrates through and is embedded in the top of the inner wall of each collecting box, a discharge assembly is fixedly arranged at the bottom of each collecting box, a recovery box is detachably mounted at one end of each corresponding discharge assembly of the urea granulation tower, each driving assembly comprises a driving pipe, the driving pipes are fixedly connected to the inner wall of each collecting box, the bottoms of the driving pipes penetrate through the collecting boxes and extend into the urea granulation tower, a first connecting frame is fixedly connected to the middle of the inner wall of each driving pipe, a transmission shaft is rotatably connected to the middle of the corresponding fixing frame through bearings, the transmission shaft is rotatably connected to the middle of the side wall of each driving pipe through bearings, fan blades are fixedly connected to the surfaces of the transmission shaft, each extrusion assembly comprises a fixed disk, the fixed disks are fixedly connected to the inner walls of the collecting boxes, a plurality of through holes are formed in the middle of the fixed disks, water absorption sponges are uniformly connected to the top and the bottom of the fixed disks, fixed surfaces of the corresponding fixed disks are fixedly connected to the fixed supports, a damping roller is fixedly connected to the fixed support, and a telescopic rod is fixedly connected to the inner wall of the fixed support.
Preferably, the top of the collection box is fixedly connected with a connecting rod, the top of the connecting rod is fixedly connected with a top cover, and the inner wall of the top of the urea granulation tower is fixedly connected with an end cover.
Preferably, the inner diameter of the middle part of the driving pipe is smaller than the inner diameters of the two ends of the driving pipe, and the inside of the driving pipe is respectively communicated with the collecting box and the urea prilling tower.
Preferably, the through-hole is the flaring formula structure for the top, the quantity of live-rollers is four, and every two live-rollers are a set of, and is two sets of the live-rollers sets up for symmetry axis symmetry about the horizontal axis of fixed disk mid point.
Preferably, the top fixedly connected with first retainer plate of driving tube, a plurality of mouths that leak have been seted up to the corresponding first retainer plate position ground lateral wall of driving tube, and the mouth that leaks is located the one end of first retainer plate surface, the inside of leaking the mouth of a river communicates with the top and the bottom homogeneous phase of collecting box respectively.
Preferably, the fixed surface of transmission shaft is connected with the guide housing, the cross section of guide housing is the arc structure, the top fixedly connected with second retainer plate of guide housing, and the surface of second retainer plate rotates through the bearing and is connected with the support frame, support frame fixed connection is at the inner wall of collecting box.
Preferably, the discharging assembly comprises a discharging pipe, the discharging pipe is fixedly embedded into the bottom of the collecting box, the inside of the discharging pipe is communicated with the inside of the collecting box, a threaded sleeve is connected to the surface of the discharging pipe in a threaded manner, a plurality of second connecting frames are fixedly connected to the bottom of the threaded sleeve, a filter screen is fixedly connected between every two adjacent second connecting frames, and a fixing block is fixedly connected to the bottom of each second connecting frame.
Preferably, the top fixedly connected with locating lever of fixed block, and the surperficial activity of locating lever has cup jointed the uide bushing, the top fixedly connected with balancing weight of uide bushing, the bottom fixedly connected with sealing washer of balancing weight, and the sealing washer closely laminates in the inner wall bottom of the corresponding delivery pipe position of collecting box, the top fixedly connected with gasbag of balancing weight.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, flue gas is pressurized in the driving pipe, so that the flue gas can drive the transmission shaft to rotate through the fan blades, the water-absorbing sponge is soaked through the spray header, when the flue gas penetrates through the through hole at the top of the collecting box and is discharged outwards through the water-absorbing sponge, urea dust is dissolved in water of the water-absorbing sponge, and water-insoluble dust is absorbed in the water-absorbing sponge;
2. the invention also can prevent water drops dropping from the extrusion component from dropping into the urea granulation tower from the inside of the driving pipe by arranging the first fixed ring, the water leaking port and the guide cover, thereby influencing the normal work of the urea granulation tower, when the water solution at the bottom of the collecting box is more, the buoyancy generated by the water solution can drive the air bag to move upwards, and when the air bag moves upwards, the air bag can drive the sealing ring to move upwards through the balancing weight, thereby separating the sealing ring from the bottom of the inner wall of the position of the corresponding discharge pipe of the collecting box, at the moment, the water solution in the collecting box can drop downwards through the discharge pipe, and has a filtering effect through the filter screen between the second connecting frames, so that the dust insoluble in the water solution is filtered, thereby improving the recycling rate of the urea dust in the dust, when the solution is less, the balancing weight can drive the sealing ring to be tightly attached to the bottom of the inner wall of the position of the corresponding discharge pipe of the collecting box under the action of the gravity of the balancing weight, thereby preventing the smoke from being discharged from the discharge pipe, the up and down movement of the balancing weight can be guided by arranging the positioning rod and the guide sleeve, and the screw thread sleeve, thereby facilitating the replacement of the dust and cleaning the surface of the filter screen.
Drawings
FIG. 1 is a front sectional view of the whole structure of a dust separating and collecting system of a prilling tower according to the present invention;
FIG. 2 is a front sectional view of a collecting box structure of a dust separating and collecting system of a prilling tower according to the present invention;
FIG. 3 is a front sectional view of an extrusion assembly of a dust separation and collection system of a prilling tower according to the present invention;
FIG. 4 is a front sectional view of a driving assembly of a dust separation and collection system of a prilling tower according to the present invention;
FIG. 5 is an enlarged view of the structure A in FIG. 4 of a dust separating and collecting system of a prilling tower according to the present invention;
fig. 6 is a top view of a screw sleeve structure of a dust separation and collection system of a prilling tower.
In the figure: 1. a urea prilling tower; 2. a collection box; 3. a drive assembly; 301. a drive tube; 302. a first connecting frame; 303. a drive shaft; 304. a fan blade; 4. an extrusion assembly; 401. fixing the disc; 402. a through hole; 403. a water-absorbing sponge; 404. a fixed bracket; 405. a telescopic rod; 406. a damping spring; 407. a fixed mount; 408. a rotating roller; 5. a shower head; 6. a connecting rod; 7. a top cover; 8. a discharge assembly; 801. a discharge pipe; 802. a threaded sleeve; 803. a second link frame; 804. a filter screen; 805. a fixed block; 806. positioning a rod; 807. a guide sleeve; 808. a counterweight block; 809. a seal ring; 810. an air bag; 9. a recycling bin; 10. An end cap; 11. a first retainer ring; 12. a water leakage port; 13. a guide housing; 14. a second retainer ring; 15. A support frame.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution: comprises a urea granulation tower 1, wherein collecting boxes 2 are respectively and fixedly arranged at two ends of the urea granulation tower 1, a driving component 3 and an extrusion component 4 are fixedly arranged inside the collecting boxes 2, a spray header 5 is embedded in the top of the inner wall of the collecting boxes 2 in a penetrating manner, a discharge component 8 is fixedly arranged at the bottom of the collecting boxes 2, a recovery box 9 is detachably arranged at one end of the urea granulation tower 1 corresponding to the discharge component 8, the driving component 3 comprises a driving pipe 301, the driving pipe 301 is fixedly arranged on the inner wall of the collecting boxes 2, the bottom of the driving pipe 301 penetrates through the collecting boxes 2 and extends into the urea granulation tower 1, a first connecting frame 302 is fixedly arranged in the middle of the inner wall of the driving pipe 301, the middle part of the first connecting frame 302 is rotatably connected with a transmission shaft 303 through a bearing, and the transmission shaft 303 is rotatably connected in the middle of the side wall of the driving pipe 301 through a bearing, fixed surface of transmission shaft 303 installs flabellum 304, extrusion subassembly 4 includes fixed disk 401, fixed disk 401 fixed mounting is at the inner wall of collecting box 2, a plurality of through-holes 402 have been seted up at the middle part of fixed disk 401, do not fixed mounting have sponge 403 that absorbs water is equallyd divide to the top and the bottom of fixed disk 401, do not fixed mounting have fixed bolster 404 are equallyd divide to the surface of the corresponding fixed disk 401 position of transmission shaft 303, and fixed bolster 404 rotates the inner wall of connecting at collecting box 2 through the bearing, the one end fixed mounting of the corresponding fixed disk 401 position of fixed bolster 404 has telescopic link 405, the fixed surface of telescopic link 405 installs damping spring 406, the one end fixed mounting that fixed bolster 404 position was kept away from to telescopic link 405 has mount 407, and the inner wall of mount 407 rotates through the bearing and is connected with live-roll 408, and the surface of live-roll 408 closely laminates with sponge 403's surface that absorbs water.
The top of collecting box 2 is fixed with connecting rod 6, and the top fixed mounting of connecting rod 6 has top cap 7, and the inner wall fixed mounting at the top of urea prilling tower 1 has end cover 10.
The internal diameter in the middle of driving tube 301 is less than the internal diameter at both ends of driving tube 301, and the inside of driving tube 301 communicates with the inside homogeneous phase of collecting box 2 and urea prilling tower 1 respectively.
The top of the through hole 402 is in a flaring structure, the number of the rotating rollers 408 is four, every two rotating rollers 408 form a group, and the two groups of rotating rollers 408 are symmetrically arranged about the horizontal axis of the midpoint of the fixed disk 401.
The top fixed mounting of driving tube 301 has first retainer plate 11, and a plurality of mouths of leaking have been seted up to the lateral wall of the corresponding first retainer plate 11 position of driving tube 301, and the mouth of leaking 12 is located the one end of the 11 surfaces of first retainer plate, and the inside of the mouth of leaking 12 communicates with the top and the bottom homogeneous phase of collecting box 2 respectively.
The fixed surface of transmission shaft 303 installs guide housing 13, and the cross section of guide housing 13 is the arc structure, and the top fixed mounting of guide housing 13 has second retainer plate 14, and the surface of second retainer plate 14 rotates through the bearing and is connected with support frame 15, and support frame 15 fixed mounting is at the inner wall of collecting box 2.
The discharging assembly 8 comprises a discharging pipe 801, the discharging pipe 801 is fixedly embedded at the bottom of the collecting box 2, the inside of the discharging pipe 801 is communicated with the inside of the collecting box 2, a threaded sleeve 802 is connected to the surface of the discharging pipe 801 in a threaded manner, a plurality of second connecting frames 803 are fixedly installed at the bottom of the threaded sleeve 802, a filter screen 804 is fixedly installed between every two adjacent second connecting frames 803, and a fixing block 805 is fixedly installed at the bottom of each second connecting frame 803.
The top of the fixed block 805 is fixedly provided with a positioning rod 806, the surface of the positioning rod 806 is movably sleeved with a guide sleeve 807, the top of the guide sleeve 807 is fixedly provided with a balancing weight 808, the bottom of the balancing weight 808 is fixedly provided with a sealing ring 809, and the sealing ring 809 is tightly attached to the bottom of the inner wall of the collecting box 2 corresponding to the position of the discharge pipe 801, the top of the balancing weight 808 is fixedly provided with an air bag 810, the arrangement of the first fixing ring 11, the water leakage port 12 and the guide cover 13 can prevent the water drops dropped from the squeezing assembly 4 from falling into the urea prilling tower 1 from the interior of the driving pipe 301, thereby affecting the normal operation of the urea prilling tower 1, when the water solution at the bottom of the collection box 2 is more, the buoyancy generated by the water solution drives the air bag 810 to move upwards, when the air bag 810 moves upwards, the air bag 810 drives the sealing ring 809 to move upwards through the counterweight block 808, so that the seal 809 is separated from the bottom of the inner wall of the collection tank 2 at the position corresponding to the drain pipe 801, the aqueous solution inside the collection tank 2 can drip down through the drain pipe 801, and the water-insoluble dust in the water solution is filtered by the filter screen 804 between the second connecting frames 803, so that the recycling rate of the urea dust in the dust is improved, and when the solution is less, under the action of the gravity of the weight 808, the weight 808 drives the sealing ring 809 to be closely attached to the bottom of the inner wall of the corresponding discharge pipe 801 of the collection box 2, thereby preventing the smoke from being discharged from the discharge pipe 801, and the positioning rod 806 and the guide sleeve 807 can play a role of guiding the up-and-down movement of the balancing weight 808, and the drainage pipe 801 is in threaded connection with the threaded sleeve 802, so that when the surface of the filter screen 804 is dusty, the filter screen can be conveniently replaced and cleaned.
The working principle is as follows: when the device is used, when smoke generated in the urea granulation tower 1 blows towards the top of the urea granulation tower 1, the smoke can enter the inside of the collection box 2 through the driving pipe 301, because the inner diameter of the middle of the driving pipe 301 is smaller than the inner diameters of the two ends of the driving pipe 301, the smoke can be pressurized in the process of entering the collection box 2 through the inside of the driving pipe 301, so that the smoke can drive the transmission shaft 303 to rotate through the fan blades 304, when the smoke penetrates through the driving pipe 301, the smoke can move upwards in the collection box 2, the smoke is sprayed to the position of the extrusion assembly 4 through the spray header 5, so that the water absorption sponge 403 is soaked, when the smoke penetrates through the through hole 402 and the water absorption sponge 403 at the top of the collection box 2 to be discharged outwards, urea dust in the smoke can be dissolved in water in the water absorption sponge 403, water-insoluble dust can be adsorbed in the water absorption sponge 403, when the transmission shaft 303 rotates, the transmission shaft 303 can drive the fixed support 404 to rotate, the fixed support 404 can tightly rotate on the surface of the water absorption sponge 403 through the telescopic rod 405 and the fixed frame 407, the water absorption sponge 403 can be adsorbed, the water film, the water of the water absorption sponge 403, the water absorption sponge 403 can be separated, and the water can be dropped into the collection box 2, and the water can be dropped into the water solution, and the dust collected water can be recovered, and the water can be completely, and the water can be recovered, and dropped into the water.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a prilling tower dust separation collecting system, includes urea prilling tower (1), its characterized in that: the urea granulation tower comprises a urea granulation tower (1), wherein the two ends of the urea granulation tower (1) are respectively and fixedly connected with a collection box (2), the interior of the collection box (2) is fixedly provided with a driving component (3) and an extrusion component (4), the top of the inner wall of the collection box (2) is penetrated and embedded with a spray header (5), the bottom of the collection box (2) is fixedly provided with a discharge component (8), one end of the urea granulation tower (1) corresponding to the discharge component (8) is detachably provided with a recovery box (9), the driving component (3) comprises a driving pipe (301), the driving pipe (301) is fixedly connected with the inner wall of the collection box (2), the bottom of the driving pipe (301) penetrates through the collection box (2) and extends to the interior of the urea granulation tower (1), the middle part of the inner wall of the driving pipe (301) is fixedly connected with a first connecting frame (302), the middle part of the first connecting frame (302) is rotatably connected with a transmission shaft (303) through a bearing, the transmission shaft (303) is rotatably connected with the middle part of the side wall of the driving pipe (301) through the bearing, the surface of the transmission shaft (303) is fixedly connected with fan blades (304), the extrusion component (4) comprises a plurality of fixed discs (401) fixedly connected with the inner wall of the collection box (401), and a plurality of fixed disc (401), the top and the bottom of the fixed disk (401) are respectively and fixedly connected with a water absorption sponge (403), the surface of the transmission shaft (303) corresponding to the position of the fixed disk (401) is respectively and fixedly connected with a fixed support (404), the fixed support (404) is rotatably connected to the inner wall of the collection box (2) through a bearing, one end of the fixed support (404) corresponding to the position of the fixed disk (401) is fixedly connected with a telescopic rod (405), the surface of the telescopic rod (405) is fixedly connected with a damping spring (406), one end of the telescopic rod (405) far away from the position of the fixed support (404) is fixedly connected with a fixed frame (407), the inner wall of the fixed frame (407) is rotatably connected with a rotating roller (408) through a bearing, and the surface of the rotating roller (408) is tightly attached to the surface of the water absorption sponge (403);
the inner diameter of the middle part of the driving pipe (301) is smaller than the inner diameters of the two ends of the driving pipe (301), and the inside of the driving pipe (301) is respectively communicated with the inside of the collection box (2) and the inside of the urea prilling tower (1);
the top of the driving pipe (301) is fixedly connected with a first fixing ring (11), the side wall of the driving pipe (301) corresponding to the position of the first fixing ring (11) is provided with a plurality of water leakage ports (12), the water leakage ports (12) are located at one end of the outer surface of the first fixing ring (11), and the insides of the water leakage ports (12) are respectively communicated with the top and the bottom of the collecting box (2);
the surface of the transmission shaft (303) is fixedly connected with a guide cover (13), the cross section of the guide cover (13) is of an arc structure, the top of the guide cover (13) is fixedly connected with a second fixing ring (14), the surface of the second fixing ring (14) is rotatably connected with a support frame (15) through a bearing, and the support frame (15) is fixedly connected to the inner wall of the collection box (2);
the discharge assembly (8) comprises a discharge pipe (801), the discharge pipe (801) is fixedly embedded at the bottom of the collection box (2), the interior of the discharge pipe (801) is communicated with the interior of the collection box (2), a threaded sleeve (802) is connected to the surface of the discharge pipe (801) in a threaded manner, a plurality of second connecting frames (803) are fixedly connected to the bottom of the threaded sleeve (802), a filter screen (804) is fixedly connected between every two adjacent second connecting frames (803), and a fixing block (805) is fixedly connected to the bottom of each second connecting frame (803);
the top fixedly connected with locating lever (806) of fixed block (805), and the surperficial activity of locating lever (806) has cup jointed uide bushing (807), the top fixedly connected with balancing weight (808) of uide bushing (807), the bottom fixedly connected with sealing washer (809) of balancing weight (808), and sealing washer (809) closely laminate in the inner wall bottom of corresponding delivery pipe (801) position of collecting box (2), the top fixedly connected with gasbag (810) of balancing weight (808).
2. The prilling tower dust separation and collection system of claim 1, wherein: the top of the collection box (2) is fixedly connected with a connecting rod (6), the top of the connecting rod (6) is fixedly connected with a top cover (7), and the inner wall of the top of the urea granulation tower (1) is fixedly connected with an end cover (10).
3. The prilling tower dust separation and collection system of claim 1, wherein: through-hole (402) are flaring formula structure for the top, the quantity of live-rollers (408) is four, and per two live-rollers (408) are a set of, and are two sets of live-rollers (408) are for the symmetry axis symmetry setting about the horizontal axis of fixed disk (401) mid point.
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| CN202011285461.XA CN112473552B (en) | 2020-11-17 | 2020-11-17 | Dust separation and collection system of prilling tower |
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| CN202011285461.XA CN112473552B (en) | 2020-11-17 | 2020-11-17 | Dust separation and collection system of prilling tower |
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