CN221062216U - Urea prilling tower with wet dedusting deamination function - Google Patents
Urea prilling tower with wet dedusting deamination function Download PDFInfo
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- CN221062216U CN221062216U CN202322832815.3U CN202322832815U CN221062216U CN 221062216 U CN221062216 U CN 221062216U CN 202322832815 U CN202322832815 U CN 202322832815U CN 221062216 U CN221062216 U CN 221062216U
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- demister
- prilling tower
- pipeline
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000004202 carbamide Substances 0.000 title claims abstract description 39
- 230000009615 deamination Effects 0.000 title claims abstract description 20
- 238000006481 deamination reaction Methods 0.000 title claims abstract description 20
- 239000000428 dust Substances 0.000 claims abstract description 40
- 239000007789 gas Substances 0.000 claims abstract description 28
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000003546 flue gas Substances 0.000 claims abstract description 19
- 239000003595 mist Substances 0.000 claims abstract description 16
- 238000000926 separation method Methods 0.000 claims abstract description 14
- 239000002253 acid Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 9
- 238000005554 pickling Methods 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 21
- 239000007921 spray Substances 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 238000011010 flushing procedure Methods 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 6
- 235000000396 iron Nutrition 0.000 claims description 3
- 210000004907 gland Anatomy 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 30
- 229910021529 ammonia Inorganic materials 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000001914 filtration Methods 0.000 abstract description 9
- 238000011282 treatment Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 3
- 230000010354 integration Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 12
- 230000009471 action Effects 0.000 description 8
- 239000006227 byproduct Substances 0.000 description 7
- 238000005469 granulation Methods 0.000 description 5
- 230000003179 granulation Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- SSBRSHIQIANGKS-UHFFFAOYSA-N [amino(hydroxy)methylidene]azanium;hydrogen sulfate Chemical compound NC(N)=O.OS(O)(=O)=O SSBRSHIQIANGKS-UHFFFAOYSA-N 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 239000000618 nitrogen fertilizer Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000011232 storage material Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000005399 mechanical ventilation Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 229940090357 urea paste Drugs 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a urea prilling tower with wet dedusting and deamination functions, which comprises a prilling tower, wherein a tray liquid-holding layer, an acid washing layer, a demister separating layer and a wet electric dust removing layer are sequentially distributed in the prilling tower from bottom to top; the bottom of the granulating tower is provided with a circulating water tank which is communicated with a circulating port in the granulating tower; two sides of the granulating tower are provided with air inlets for conveying flue gas into the granulating tower; the top of the granulating tower is also provided with a plurality of axial flow fans which are used for overcoming internal resistance and facilitating gas discharge; the utility model adopts a multistage cooperative treatment process of 'tray liquid-holding layer filtration, acid mist absorption, demister liquid-gas separation, wet electric dust removal deep purification and induced draft fan integration process', recycles dust and free ammonia in tail gas discharged from a granulating tower, reduces energy consumption of equipment production, and solves the problems of resource waste and environmental pollution.
Description
Technical Field
The utility model relates to the technical field of urea production equipment, in particular to a urea prilling tower with wet dust removal and deamination functions.
Background
China is a large country for urea production, and small-particle and medium-particle urea is the most, and at present, a technology for cooling and forming molten urea in the falling process by a prilling tower is mostly adopted. The urea prilling tower is a key device in urea production, and the urea prilling tower is cooled and solidified and formed in the falling process by natural ventilation and mechanical ventilation, and most of urea prilling tower adopts a bottom shutter natural ventilation mode, but more urea powder and trace free ammonia are produced in the prilling tower prilling process due to the reasons of the defects of a prilling tower nozzle, the operation process, the reaction of urea and the like, and the urea powder and trace free ammonia enter the cooling air, so that the environment is polluted.
Most of urea dust carried in the gas exhausted from the urea prilling tower can fall on the ground within a few kilometers nearby, not only corrode objects, but also harm the growth of crops, cause the wilting of branches and leaves of nearby trees, destroy greening of factories and clean civilization production, and simultaneously damage the health of people. If the urea dust in the exhaust gas is not reasonably utilized, the energy consumption of production equipment can be increased, the competitive capacity of enterprises in the market can be weakened, and the survival and development of the enterprises are limited.
At present, the mode of dedusting the tail gas of the granulation tower in the market mainly comprises two modes of water washing spray dedusting and dry type filtering dedusting, wherein the water washing spray dedusting mainly comprises the step of arranging a water spray tower at the top of the granulation tower to spray dedusting, but the problems of blockage, tail gas emission tailing with liquid and the like caused by easy corrosion and deformation of filler are easily caused. The dry type filtering dust removal is mainly cloth bag dust removal, and the problems that a urea paste suction bag is blocked when the cloth bag dust removal is specifically used, NH3 cannot be treated and the like can occur.
Disclosure of Invention
The utility model aims to solve the technical problems of providing the urea prilling tower with the wet dedusting and deamination functions, which can recycle dust and free ammonia in tail gas discharged from the prilling tower, and simultaneously solve the problems of water washing spray dedusting and dry filtering dedusting, reduce the energy consumption of equipment production and solve the problems of resource waste and environmental pollution.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows.
The urea prilling tower with the wet dedusting and deamination functions comprises a prilling tower arranged on a base, wherein a tray liquid-holding layer, an acid washing layer, a demister separating layer and a wet electric dedusting layer are sequentially distributed in the prilling tower from bottom to top; the bottom of the granulating tower is provided with a circulating water tank which is communicated with a circulating port in the granulating tower; two sides of the granulating tower are provided with air inlets for conveying flue gas into the granulating tower; the top of the granulation tower is also provided with a plurality of axial flow fans which are used for overcoming internal resistance and are convenient for gas discharge.
The urea prilling tower with the wet dedusting and deamination functions comprises a tray liquid-holding layer, wherein the tray liquid-holding layer comprises a mounting frame arranged on the inner wall of the prilling tower, and the mounting frame is of an annular structure formed by connecting a plurality of annular angle irons; a plurality of first supporting beams are arranged on the mounting frame, and a plurality of trays perpendicular to the first supporting beams are arranged between the first supporting beams.
The tray comprises a perforated bottom plate provided with a plurality of through holes; one side of the bottom plate with holes is provided with a first bending plate, and the middle part of the bottom plate with holes is provided with a second bending plate vertical to the first bending plate.
The urea prilling tower with the wet dedusting and deamination functions comprises the pickling layer, wherein the pickling layer comprises a pickling pipeline, and the pickling pipeline is arranged in the prilling tower through a spraying support piece; the bottom of the pickling pipeline is provided with a plurality of first nozzles which spray downwards; and a circulating pickling pump for circularly conveying the dilute sulfuric acid slurry is further arranged on the pickling pipeline.
The urea prilling tower with the wet dedusting and deamination functions comprises a plurality of second supporting beams arranged in the prilling tower, and demister modules for gas-liquid separation are arranged between the second supporting beams; a pressing plate of the gland demister module is arranged above the second supporting beam and is connected with the second supporting beam through a threaded column; the demister separating layer further comprises a pipeline support located below the second supporting beam, a flushing pipeline is mounted on the pipeline support through a hoop, and a second spray nozzle spraying upwards is arranged on the flushing pipeline.
The urea prilling tower with the wet dedusting and deamination functions is characterized in that a demister corrugated plate for separating and capturing mist is arranged in the demister module; the demister corrugated plate comprises a clamping strip arranged in the demister module, and a plurality of demister blades are clamped on the clamping strip.
The urea prilling tower with the wet dedusting and deamination functions comprises a spraying flushing layer arranged at the top of the wet electric dedusting layer, a wet electric heating air module and a plurality of third supporting beams arranged inside the prilling tower; a plurality of anode tubes which are arranged in parallel are arranged on the third support beam, and cathode wires are arranged in the anode tubes; the upper and lower ends of the cathode wire are respectively arranged on the cathode fixing frame, and the circumference of the granulating tower is also provided with a cathode fixer; the two sides of the granulation tower are respectively provided with a grounding module, a plurality of insulation box devices are circumferentially arranged in the granulation tower, and the insulation box devices are connected with a high-frequency power supply.
The wet electric heating air module comprises a hot air pipeline communicated with a hot air fan, and the two hot air pipelines are connected through a three-way valve; the other valve port of the three-way valve is connected with the electric heater through a pipeline.
By adopting the technical scheme, the utility model has the following technical progress.
The utility model provides a urea prilling tower with wet dedusting and deamination functions, which adopts a multistage cooperative treatment process of 'tray liquid-holding layer filtration, acid mist absorption, demister liquid-gas separation, wet electric dedusting deep purification and induced draft fan integrated process', and recycles dust and free ammonia in exhaust gas discharged from the prilling tower, and the generated byproduct urea sulfate is a high-quality sulfur-containing nitrogen fertilizer product, can be used as a novel phase-change heat storage material, reduces energy consumption of equipment production, and solves the problems of resource waste and environmental pollution.
The utility model adopts the demister to separate gas from liquid and separate aerosol and suspended dust particles in gas by a wet electric precipitation method, thereby avoiding the problem that urea dust is easy to absorb moisture.
Drawings
FIG. 1 is a schematic diagram of a specific structure of the present utility model;
FIG. 2 is a top view of the liquid-holding layer of the tray of the present utility model;
FIG. 3 is a schematic view of a specific structure of the tray according to the present utility model;
FIG. 4 is a schematic diagram showing a specific structure of the pickling layer according to the present utility model;
FIG. 5 is a flow chart of the operation of the acid wash layer of the present utility model;
FIG. 6 is a schematic view of a separator layer of a demister according to the present utility model;
FIG. 7 is an enlarged view of a portion of the portion X of FIG. 6;
FIG. 8 is an enlarged view of a portion of Y in FIG. 6;
FIG. 9 is an enlarged view of a portion of FIG. 7 at Z;
FIG. 10 is a schematic view showing a specific structure of the wet electric dust removing layer according to the present utility model;
FIG. 11 is a top view of a wet electric dust collector according to the present utility model;
Fig. 12 is a schematic structural diagram of the wet electric hot air pipeline according to the present utility model.
Wherein: 1. the system comprises a prilling tower, 2, a base, 3, a circulating water tank, 4, an air inlet, 5, a circulating port, 6, a tray liquid holding layer, 61, 611, a perforated bottom plate, 612, a first folding plate, 613, a second folding plate, 62, a mounting bracket, 63, a first support beam, 7, a pickling layer, 71, a pickling pipe, 72, a first nozzle, 73, a spray support, 74, a circulating pickling pump, 75, a byproduct discharge system, 8, a mist eliminator separation layer, 81, a second support beam, 82, a mist eliminator module, 83, a pressure plate, 84, a threaded column, 85, a mist eliminator corrugated plate, 851, a clamping strip, 852, mist eliminator blades, 86, pipe support, 87, hoops, 88, a flushing pipe, 89, a second nozzle, 9, a wet electric dust removal layer, 91, a third support beam, 92, an anode pipe, 93, a cathode wire, 94, a cathode fixing frame, 95, a grounding module, 96, an insulation box device, 97, a high frequency power supply, 98, a wet electric heating air module, 981, a hot air fan 982, a pipeline, 983, a three-way, an electric heater, a three-way valve, a 10, a mist eliminator, a three-way valve, a 10, a fan, a housing, a fan, a 98.
Detailed Description
The utility model will be described in further detail with reference to the drawings and the detailed description.
The utility model provides a urea prilling tower with wet dedusting deamination function, as shown in fig. 1 through 11, including installing prilling tower 1 on base 2, the inside of prilling tower 1 has distributed tray liquid-holding layer 6 from bottom to top in proper order, pickling layer 7, defroster separating layer 8, wet electric dust removal layer 9, the bottom of prilling tower 1 is provided with circulation basin 3, circulation basin 3 communicates with the inside circulation mouth 5 of prilling tower 1, the both sides of prilling tower 1 are provided with the air inlet 4 that carries the flue gas in to prilling tower 1, the top of prilling tower 1 still is provided with a plurality of axial fan 11 that are used for overcoming the internal resistance.
The tray liquid-holding layer 6 comprises a mounting frame 62 mounted on the inner wall of the prilling tower 1, the mounting frame 62 is of an annular structure formed by connecting a plurality of annular angle irons, as shown in fig. 2, a plurality of first supporting beams 63 are arranged on the mounting frame 62, and a plurality of trays 61 perpendicular to the first supporting beams 63 are mounted between the first supporting beams 63.
The tray 61 includes a perforated bottom plate 611 provided with a plurality of through holes, and as shown in fig. 3, a first bending plate 612 is provided at one side of the perforated bottom plate 611, and a second bending plate 613 perpendicular to the first bending plate 612 is provided at the middle of the perforated bottom plate 611.
The spraying agent can fall on the tray to form a layer of liquid-holding layer in the spraying working process, when the flue gas passes through the tray, the gas-liquid disturbance is severe, the tray presents a state similar to boiling, the collision probability and the contact area of particulate matters and water in the flue gas are increased, the specific surface area increased by the atomized liquid film layer can be fully utilized to fully exchange with urea dust particles in the flue gas, and the spraying area is increased due to the fact that the structure of the tray 61 is relatively outwards protruded, so that more spraying liquid is attached to the tray, the contact area and the contact efficiency of the spraying liquid and the flue gas are improved, and the wet dust removal effect is enhanced.
The pickling layer 7 comprises a pickling pipeline 71, as shown in fig. 4, the pickling pipeline 71 is installed in the prilling tower 1 through a spraying support 73, a plurality of first nozzles 72 spraying downwards are arranged at the bottom of the pickling pipeline 71, and a pressure gauge for detecting the pressure in the pipeline and a pressure transmitter for dredging the pressure of the pipeline are also installed on the pickling pipeline 71.
The dilute sulfuric acid slurry in the pickling storage tank is sent into the pickling pipeline 71 through the circulating pickling pump 74 to be split, as shown in fig. 5, the slurry sprayed from the first nozzle 72 is atomized to form dispersed small droplets to run downwards, the dispersed small droplets are fully contacted with free ammonia in the tail gas in a countercurrent manner, not only is the free ammonia in the tail gas washed, but also part of dust particles in the tail gas are contacted with the droplets to be trapped, the free ammonia in the tail gas is neutralized and absorbed with a certain proportion of dilute sulfuric acid, and the reacted byproduct urea sulfate flows to the byproduct discharge system 75 to be recycled.
The demister separation layer 8 includes a plurality of second support beams 81 installed in the prilling tower 1, as shown in fig. 7, demister modules 84 for gas-liquid separation are installed between the second support beams 81, a pressing plate 83 pressing the demister modules 84 is installed above the second support beams 81, and the pressing plate 83 is connected with the second support beams 81 through screw columns 84.
The demister separation layer 8 further includes a pipe support 86 located below the second support beam 81, and as shown in fig. 8, a flushing pipe 88 is mounted on the pipe support 86 through a hoop 87, and a second nozzle 89 for spraying upward is provided on the flushing pipe 88.
The demister module 84 is internally provided with a demister corrugated plate 85 for separating and capturing mist, and as shown in fig. 9, the demister corrugated plate 85 comprises a clamping strip 851 installed in the demister module 84, and a plurality of demister blades 852 are clamped on the clamping strip 851.
The demister blades 852 separate the mist so that the mist collides with the surface of the wavy blade to form a liquid film, the liquid film moves upwards along with the airflow to the turning positions of the demister blades 852 to be separated, and the demisted gas continues to move upwards.
The wet electric precipitation layer 9 comprises a plurality of third supporting beams 91 installed inside the prilling tower 1, as shown in fig. 10, a plurality of anode pipes 92 arranged in parallel are installed on the third supporting beams 91, cathode wires 93 are installed in the anode pipes 92, the upper ends and the lower ends of the cathode wires 93 are respectively installed on a cathode fixing frame 94, and cathode fixing devices 99 are installed on the periphery of the prilling tower 1.
The grounding modules 95 are respectively installed on both sides of the prilling tower 1, and a plurality of insulation box devices 96 are circumferentially arranged inside the prilling tower 1, and as shown in fig. 11, the insulation box devices 96 are connected with a high-frequency power supply 97.
The wet electric dust collector 9 further includes a wet electric hot air module 98, as shown in fig. 12, the wet electric hot air module 98 includes a hot air pipeline 982 communicated with a hot air fan 981, the two hot air pipelines 982 are connected through a three-way valve 983, and the other valve port of the three-way valve 983 is connected with an electric heater 984 through a pipeline.
The top of the wet electric dust removal layer 9 is provided with a spray rinsing layer 10, a corona layer is generated around a corona wire under the action of a strong electric field between an anode tube 92 and a cathode wire 93, and air in the corona layer is subjected to avalanche ionization, so that a large amount of negative ions and a small amount of positive ions are generated.
The dust particles entering the wet electric dust collector 9 along with the flue gas collide with the positive ions and the negative ions under the action of the high-frequency power supply 97 to be charged, and the charged dust particles move to the anode due to the action of the coulomb force of the high-voltage electrostatic field.
When the dust reaches the anode, the charges carried by the dust are released, dust and mist particles are collected by the anode, and the collected dust forms a water film under the action of the upper spray flushing layer 10 and flows to the lower liquid accumulation groove from the upper part by flushing, so that the dust and the mist are separated from the flue gas.
The working mode and principle of the utility model are as follows: the flue gas discharged during the production of the prilling tower 1 enters the tower body from the air inlet 4 under the action of the axial flow fan 11 at the top of the tower, and is filtered and absorbed by the liquid-holding layer 6 of the tray to carry out primary filtration, so that most of urea particles and free ammonia are removed, the liquid-holding layer 6 of the tray has better capturing performance on tiny dust, gaseous pollutants can be washed, the removal efficiency of more than 60% can be achieved, the urea dust after filtration is controlled to be about 50mg/m 3, and the ammonia is controlled to be about 20mg/m 3.
The purified flue gas flows into the acid washing layer 7 for acid removal treatment, dilute sulfuric acid slurry sent into the acid washing pipeline 71 through the circulating acid washing pump 74 is sprayed out from the first nozzle 72, dispersed small liquid drops are formed by atomizing the slurry to move downwards and fully contact with free ammonia in the tail gas in a countercurrent way, so that the free ammonia in the tail gas is washed, part of dust particles in the tail gas are contacted with the liquid drops to be trapped, free ammonia in the tail gas is neutralized and absorbed by a certain proportion of dilute sulfuric acid, and urea sulfate byproduct generated after the reaction is sent to the byproduct emission system 75 for recycling.
The flue gas after the deacidification treatment is continuously led to the downstream, the flue gas is subjected to flow guiding treatment through a demister corrugated plate 85 in a demister separation layer 8, liquid drops and mist collide on demister blades 852 to form a liquid film under the action of inertia force, the liquid film moves forward along with air flow to a turning position to be separated, and the liquid film falls into a slurry pond under the action of gravity, so that gas-liquid separation is realized, and the flue gas flowing through the demister separation layer 8 is discharged after meeting demisting requirements.
Finally, the flue gas after multiple treatments enters the wet electric precipitation layer 9 for secondary filtration, and the collected dust particles are collected to a circulating groove below through the action of electric field force and separated from the purified flue gas, so that the secondary reaction of the flue gas is not participated, the secondary entrainment of tail gas is avoided, and the flue gas reaching the standard after reaching the standard is discharged through a pipeline and a power device.
The utility model provides a urea prilling tower with wet dedusting and deamination functions, which adopts a multistage cooperative treatment process of 'tray liquid-holding layer filtration, acid mist absorption, demister liquid-gas separation, wet electric dedusting deep purification and induced draft fan integrated process', and recycles dust and free ammonia in exhaust gas discharged from the prilling tower, and the generated byproduct urea sulfate is a high-quality sulfur-containing nitrogen fertilizer product, can be used as a novel phase-change heat storage material, reduces energy consumption of equipment production, and solves the problems of resource waste and environmental pollution.
The utility model adopts the demister to separate gas from liquid and separate aerosol and suspended dust particles in gas by a wet electric precipitation method, thereby avoiding the problem that urea dust is easy to absorb moisture.
Claims (6)
1. The utility model provides a urea prilling tower with wet dedusting deamination function, includes prilling tower (1), its characterized in that: a tray liquid-holding layer (6), an acid washing layer (7), a demister separating layer (8) and a wet electric dust removing layer (9) are sequentially distributed in the granulating tower (1) from bottom to top; the bottom of the granulating tower (1) is provided with a circulating water tank (3), and the circulating water tank (3) is communicated with a circulating port (5) in the granulating tower (1); two sides of the granulating tower (1) are provided with air inlets (4) for conveying flue gas into the granulating tower (1); the top of the granulating tower (1) is also provided with a plurality of axial flow fans (11) which are used for overcoming internal resistance and facilitating gas discharge;
The tray liquid-holding layer (6) comprises a mounting frame (62) arranged on the inner wall of the prilling tower (1), and the mounting frame (62) is of an annular structure formed by connecting a plurality of annular angle irons; a plurality of first supporting beams (63) are arranged on the mounting frame (62), and a plurality of trays (61) which are perpendicular to the first supporting beams (63) are arranged between the first supporting beams (63);
The tray (61) comprises a perforated bottom plate (611) provided with a plurality of through holes; a first bending plate (612) is arranged on one side of the perforated bottom plate (611), and a second bending plate (613) perpendicular to the first bending plate (612) is arranged in the middle of the perforated bottom plate (611).
2. The urea prilling tower with wet dedusting and deamination functions according to claim 1, wherein: the pickling layer (7) comprises a pickling pipeline (71), and the pickling pipeline (71) is arranged in the granulating tower (1) through a spraying support piece (73); a plurality of first nozzles (72) which spray downwards are arranged at the bottom of the pickling pipeline (71); the pickling pipeline (71) is also provided with a circulating pickling pump (74) for circulating and conveying the dilute sulfuric acid slurry.
3. The urea prilling tower with wet dedusting and deamination functions according to claim 1, wherein: the demister separation layer (8) comprises a plurality of second supporting beams (81) arranged in the prilling tower (1), and demister modules (82) for gas-liquid separation are arranged between the second supporting beams (81); a pressing plate (83) of a gland demister module (82) is arranged above the second supporting beam (81), and the pressing plate (83) is connected with the second supporting beam (81) through a threaded column (84); the demister separation layer (8) further comprises a pipeline support (86) positioned below the second support beam (81), a flushing pipeline (88) is arranged on the pipeline support (86) through a hoop (87), and a second spray nozzle (89) spraying upwards is arranged on the flushing pipeline (88).
4. A urea prilling tower with wet dedusting deamination function according to claim 3, characterized in that: a demister corrugated plate (85) for separating and capturing mist is arranged inside the demister module (82); the demister corrugated plate (85) comprises a clamping strip (851) arranged in the demister module (82), and a plurality of demister blades (852) are clamped on the clamping strip (851).
5. The urea prilling tower with wet dedusting and deamination functions according to claim 1, wherein: the wet electric dust removal layer (9) comprises a spray flushing layer (10) arranged at the top of the wet electric dust removal layer (9), a wet electric hot air module (98) and a plurality of third supporting beams (91) arranged in the granulating tower (1); a plurality of anode pipes (92) which are arranged in parallel are arranged on the third supporting beam (91), and cathode wires (93) are arranged in the anode pipes (92); the upper end and the lower end of the cathode wire (93) are respectively arranged on a cathode fixing frame (94), and a cathode fixer (99) is also arranged on the periphery of the prilling tower (1); the two sides of the granulating tower (1) are respectively provided with a grounding module (95), a plurality of insulating box devices (96) are circumferentially arranged in the granulating tower (1), and the insulating box devices (96) are connected with a high-frequency power supply (97).
6. The urea prilling tower with wet dedusting and deamination functions according to claim 5, wherein: the wet electric hot air module (98) comprises a hot air pipeline (982) communicated with a hot air fan (981), and the two hot air pipelines (982) are connected through a three-way valve (983); the other valve port of the three-way valve (983) is connected with the electric heater (984) through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322832815.3U CN221062216U (en) | 2023-10-23 | 2023-10-23 | Urea prilling tower with wet dedusting deamination function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322832815.3U CN221062216U (en) | 2023-10-23 | 2023-10-23 | Urea prilling tower with wet dedusting deamination function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221062216U true CN221062216U (en) | 2024-06-04 |
Family
ID=91253963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322832815.3U Active CN221062216U (en) | 2023-10-23 | 2023-10-23 | Urea prilling tower with wet dedusting deamination function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221062216U (en) |
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2023
- 2023-10-23 CN CN202322832815.3U patent/CN221062216U/en active Active
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