CN114307606A - SO in sintering flue gas ultralow emission system3Removing device - Google Patents
SO in sintering flue gas ultralow emission system3Removing device Download PDFInfo
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- CN114307606A CN114307606A CN202210038852.4A CN202210038852A CN114307606A CN 114307606 A CN114307606 A CN 114307606A CN 202210038852 A CN202210038852 A CN 202210038852A CN 114307606 A CN114307606 A CN 114307606A
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- ammonia water
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- 239000003546 flue gas Substances 0.000 title claims abstract description 80
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 238000005245 sintering Methods 0.000 title claims abstract description 21
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 69
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 69
- 238000005507 spraying Methods 0.000 claims abstract description 53
- 238000010521 absorption reaction Methods 0.000 claims abstract description 40
- 239000007921 spray Substances 0.000 claims abstract description 32
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000012856 packing Methods 0.000 claims abstract description 29
- 238000003795 desorption Methods 0.000 claims abstract description 27
- 239000002002 slurry Substances 0.000 claims abstract description 15
- 238000003860 storage Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000006477 desulfuration reaction Methods 0.000 abstract description 2
- 230000023556 desulfurization Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 229910021529 ammonia Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 239000000779 smoke Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 230000003009 desulfurizing effect Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- -1 powder metallurgy Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
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Abstract
The invention relates to the technical field of desulfurization equipment, and provides SO in a sintering flue gas ultralow emission system3The removing device comprises a removing tower, wherein the bottom of the removing tower is used for containing alkaline slurry and is provided with a flue gas inlet and a flue gas outlet, an absorption spraying layer is arranged inside the removing tower and is communicated with the alkaline slurry through a circulating pump, the flue gas inlet is positioned between the liquid level of the alkaline slurry and the absorption spraying layer, and the removing device also comprises SO3The desorption layer is arranged inside the desorption tower, is positioned above the absorption spray layer and below the flue gas outlet, comprises a pre-defogging layer, a packing layer, an ammonia water spray layer and a tail-end defogging layer which are sequentially arranged from bottom to top, wherein the ammonia water spray layer is communicated with the ammonia water storage tank through a delivery pump and is used for removing ammonia waterAnd (3) spraying ammonia water inside the tower, and contacting the flue gas with the ammonia water sprayed by the ammonia water spraying layer after the flue gas passes through the packing layer. The problem that ammonia water and flue gas cannot be fully contacted when the desorption tower in the related technology is used and SO in the flue gas is caused is solved by additionally arranging the packing layer3The problem of incomplete removal.
Description
Technical Field
The invention relates to the technical field of desulfurization equipment, in particular to SO in a sintering flue gas ultralow emission system3And a removing device.
Background
In the steel production industry, a sintering process is commonly used, wherein sintering refers to converting a powdery material into a compact, and is a traditional process, people have long utilized the process to produce ceramics, powder metallurgy, refractory materials, ultra-high temperature materials and the like, generally speaking, after powder is formed, the compact obtained by sintering is a polycrystalline material, and the microstructure of the compact consists of crystals, glass bodies and air holes. A large amount of flue gas can be produced in the sintering process generally, certain harmful substances can be contained in the flue gas, a desorption tower can be generally used when the flue gas is treated, but certain inconvenience exists in the existing desorption tower when the existing desorption tower is used, and ammonia water and the flue gas can not be in sufficient contact when the existing desorption tower is used, SO that SO in the flue gas is caused3The removal is incomplete.
Disclosure of Invention
The invention provides SO in a sintering flue gas ultralow emission system3The removal device solves the problem that ammonia water and flue gas can not be fully contacted when the removal tower in the related technology is used, SO that SO in the flue gas is generated3The problem of incomplete removal.
The technical scheme of the invention is as follows:
SO in sintering flue gas ultralow emission system3A removal device, comprising:
the bottom of the removing tower is used for containing alkaline slurry and is provided with a flue gas inlet and a flue gas outlet,
the absorption spraying layer is arranged in the desorption tower and is communicated with the alkaline slurry through a circulating pump, the flue gas inlet is positioned between the liquid level of the alkaline slurry and the absorption spraying layer,
further comprising:
SO3the desorption layer sets up inside the desorption tower, be located the absorption sprays the layer top, is located the exhanst gas outlet below, including from the bottom up set gradually remove fog layer, packing layer, aqueous ammonia in advance and spray layer and terminal defogging layer, the aqueous ammonia sprays the layer and passes through delivery pump and aqueous ammonia holding vessel intercommunication, be used for to desorption tower inside sprays the aqueous ammonia, the flue gas passes through behind the packing layer, with the aqueous ammonia sprays the aqueous ammonia contact of layer injection.
As a further technical solution, the pre-defogging layer includes:
the tubular demister is arranged in the desorption tower and is positioned above the absorption spraying layer,
the first demisting layer is arranged in the removing tower and is positioned above the tubular demister,
and the second demisting layer is arranged inside the removing tower, is arranged at an interval with the first demisting layer and is positioned above the first demisting layer, and the flue gas sequentially passes through the tubular demister, the first demisting layer and the second demisting layer.
As a further technical solution, the method further comprises:
a separation louver layer arranged between the absorption spray layer and the SO3Between the removal layers, comprising
A control member disposed inside the stripping column,
the louver blades are provided with a plurality of louver blades which are all rotatably arranged on the inner wall of the removing tower, the control part drives the louver blades to rotate, and after the louver blades rotate, the absorption spraying layer and the SO are sprayed3The channels between the removal layers become larger or smaller.
As a further technical scheme, the control member is provided with teeth, the control member is movably arranged in the removal tower, one end of the control member penetrates through the inner wall of the removal tower and is used for being connected with a power source, the louver is provided with a gear, a rotating shaft of the louver on the inner wall of the removal tower is perpendicular to the arrangement direction of the control member, and the louver is controlled to rotate on the inner wall of the removal tower through the meshing relationship of the teeth and the teeth of the gear after the control member is moved.
As a further technical scheme, the number of the separation louver layers is two, and one separation louver layer is arranged between the absorption spraying layer and the SO3And the other one is arranged between the ammonia water spraying layer and the tail end demisting layer.
As a further technical scheme, the first demisting layer, the second demisting layer and the tail end demisting layer are all herringbone demisters and are provided with cleaning spray heads.
As a further technical scheme, the conveying pumps are provided with two conveying pumps, and the ammonia water spraying layer is communicated with the ammonia water storage tank through any one conveying pump.
The working principle and the beneficial effects of the invention are as follows:
in the prior art, when flue gas generated in the sintering process is treated, a desulfurizing tower is generally adopted, the desulfurizing tower is widely used at present, but in practical application, the problem still exists, namely SO is treated3When the ammonia gas is removed, the ammonia gas can be used, but the ammonia gas and SO injected in the process are discharged from bottom to top in the removing tower due to the smoke gas3The contact area and the contact time are both relatively short, and in order to prolong the reaction time in the prior art, the height of a removal tower is generally increased, so that the time and the labor are wasted, and the input cost is increased.
In order to solve the technical problems and break through the traditional idea of solving the problems, the flue gas is slowed down to be discharged by the arrangement of the structure in the removal tower, the flue gas is fully contacted and reacted with the ammonia water sprayed by the ammonia water spraying layer in the removal tower, the height of the removal tower does not need to be increased, and the SO can be increased3The absorption effect of (1).
The specific idea is to arrange SO above the absorption spray layer3A desorption layer for removing SO2Remove SO2The smoke continuously passes through the pre-defogging layer, the filler layer and the ammonia water for sprayingLayer and terminal defogging layer, wherein, terminal defogging layer and the effect of defogging except that defogging in advance defogging layer also can play the emission velocity who slows down the flue gas, and especially terminal defogging layer can make the aqueous ammonia that sprays the layer and spray out between the two can prolong contact time with the flue gas in this space with the aqueous ammonia, and further, add the packing layer, and the packing layer has a plurality of particulate matters, and the interpolation of packing layer can increase aqueous ammonia and SO3By which the SO can be increased3The absorption effect of the device can effectively prevent the fog drops from being discharged to exceed the standard and prevent SO in the flue gas after the flue gas is sintered and desulfurized by the aid of the pre-defogging layer and the tail end defogging layer3The concentration is about 5-40mg/Nm3, the content is less, the injection amount of ammonia water with 5% concentration is less, therefore, the water balance in the desulfurizing tower can not be influenced, and the using effect is better compared with the traditional mode.
The specific technical scheme is that SO in the sintering flue gas ultralow emission system3The removing device comprises a lower SO2And SO located above3Of the removal unit, SO located below2The removing unit adopts the traditional operation, namely alkaline slurry below the removing tower passes through a circulating pump and then is sprayed out of an absorption spraying layer, the absorption spraying layer can be a plurality of layers, for example, the absorption spraying layer is arranged into four layers, and SO is removed2The flue gas continuously passes through the pre-defogging layer, the packing layer, the ammonia water spraying layer and the tail-end defogging layer upwards and then is discharged from the flue gas outlet, wherein the removing tower is a wet removing tower, the packing layer is additionally arranged behind the pre-defogging layer in the wet removing tower, the thickness of the packing layer is 200mm, the ammonia water spraying layer is arranged at the upper part of the packing layer, and the ammonia water with the concentration of 5% is sprayed to ensure that NH is sprayed3With SO in flue gas3Reaction to form (NH)4)2SO4And (NH)4)2SO3，(NH4)2SO4And (NH)4)2SO3Is very soluble in water (NH)4)2SO4And (NH)4)2SO3The solution finally falls into the bottom of the removing tower, a tail end demisting layer is additionally arranged above the packing layer, the condition that the discharge of fog drops in the flue gas exceeds the standard is effectively prevented, and the packing layer increases ammonia water and SO3The contact area of the contact is relatively practical.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of an absorbing spray layer of the present invention;
FIG. 3 is a schematic view of the structure of a partitioning louver layer according to the present invention;
in the figure: 1. a removing tower, 2, alkaline slurry, 3, a flue gas inlet, 4, a flue gas outlet, 5, an absorption spraying layer, 6, a liquid level, 7 and SO3The device comprises a removing layer, 8, a pre-defogging layer, 9, a packing layer, 10, an ammonia water spraying layer, 11, a tail end defogging layer, 12, a conveying pump, 13, an ammonia water storage tank, 14, a tubular defogger, 15, a first defogging layer, 16, a second defogging layer, 17, a separation louver layer, 18, a control part, 19, a louver sheet, 20 and a cleaning spray head.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 inventive step, are intended to be within the scope of the present invention.
As shown in fig. 1 to 3, the present embodiment proposes
SO in sintering flue gas ultralow emission system3A removal device, comprising:
the bottom of the removing tower 1 is used for containing alkaline slurry 2 and is provided with a flue gas inlet 3 and a flue gas outlet 4,
an absorption spraying layer 5 arranged inside the desorption tower 1, the absorption spraying layer 5 is communicated with the alkaline slurry 2 through a circulating pump, a flue gas inlet 3 is positioned between the liquid level 6 of the alkaline slurry 2 and the absorption spraying layer 5,
further comprising:
SO3a removing layer 7 arranged inside the removing tower 1, above the absorbing and spraying layer 5 and below the flue gas outlet 4, and comprising a plurality of layers arranged from bottom to top in sequenceThe device comprises a pre-defogging layer 8, a packing layer 9, an ammonia water spraying layer 10 and a tail end defogging layer 11, wherein the ammonia water spraying layer 10 is communicated with an ammonia water storage tank 13 through a conveying pump 12 and is used for spraying ammonia water into the desorption tower 1, and the flue gas passes through the packing layer 9 and then contacts with the ammonia water sprayed by the ammonia water spraying layer 10.
In the prior art, when flue gas generated in the sintering process is treated, a desulfurizing tower is generally adopted, the desulfurizing tower is widely used at present, but in practical application, the problem still exists, namely SO is treated3When the ammonia gas is removed, the ammonia gas can be used, but the ammonia gas and SO injected in the process are discharged from bottom to top in the removing tower 1 due to the flue gas3The contact area and the contact time are both relatively short, and in order to prolong the reaction time in the prior art, the height of the removing tower 1 is generally increased, so that time and labor are wasted, and the input cost is increased.
In this embodiment, in order to solve above technical problem, broken through the thinking of traditional solution problem, through the setting of desorption tower 1 inner structure for the flue gas slows down the emission, sprays the abundant contact reaction of layer 10 injection aqueous ammonia with the aqueous ammonia in desorption tower 1, need not to improve desorption tower 1's height, also can improve SO3The absorption effect of (1).
The specific idea is to arrange the SO above the absorption spray layer 53A desorption layer 7 and an absorption spray layer 5 for removing SO2Remove SO2The flue gas continue to go up through in advance defogging layer 8, packing layer 9, the aqueous ammonia sprays layer 10 and terminal defogging layer 11, wherein, terminal defogging layer 11 and in advance defogging layer 8 except the effect of defogging, also can slow down the emission velocity of flue gas, especially terminal defogging layer can make aqueous ammonia between the two spray the aqueous ammonia that layer 10 sprayed out can with the flue gas in this space, the extension contact time, and further, add packing layer 9, packing layer 9 has a plurality of particulate matters, the adduction of packing layer 9 can increase aqueous ammonia and SO3By which the SO can be increased3The absorption effect of (2) and the pre-defogging layer (8) and the tail-end defogging layer (11) can effectively prevent the fog drops from being discharged to exceed the standard and prevent the sintering flue gas from being removedSO in post-sulfur flue gas3The concentration is about 5-40mg/Nm3, the content is less, the injection amount of ammonia water with 5% concentration is less, therefore, the water balance in the desulfurizing tower can not be influenced, and the using effect is better compared with the traditional mode.
The specific technical scheme is that SO in the sintering flue gas ultralow emission system3The removing device comprises a lower SO2And SO located above3Of the removal unit, SO located below2The removal unit adopts the traditional operation, namely the alkaline slurry 2 below the removal tower 1 passes through the circulating pump and then is sprayed out from the absorption spraying layer 5, the absorption spraying layer 5 can be a plurality of layers, the embodiment is provided with four layers, and SO is removed2The flue gas continue upwards through remove fog layer 8 in advance, packing layer 9, aqueous ammonia spray layer 10 and terminal demisting layer 11 after and discharge from exhanst gas outlet 4, wherein desorption tower 1 is wet process desorption tower 1, add packing layer 9 behind the remove fog layer 8 in advance in wet process desorption tower 1, packing layer 9 thickness is 200mm, set up aqueous ammonia spray layer 10 on packing layer 9 upper portion, spray the aqueous ammonia of 5% concentration, make NH3With SO in flue gas3Reaction to form (NH)4)2SO4And (NH)4)2SO3，(NH4)2SO4And (NH)4)2SO3Is very soluble in water (NH)4)2SO4And (NH)4)2SO3The solution finally falls into the bottom of the removing tower 1, a tail end demisting layer 11 is additionally arranged above the packing layer 9, the excessive discharge of fog drops in the flue gas is effectively prevented, and the packing layer 9 increases ammonia water and SO3The contact area of the contact is relatively practical.
Further, the preliminary defogging layer 8 includes:
a tubular demister 14 arranged inside the removing tower 1 and above the absorbing and spraying layer 5,
a first demisting layer 15 which is arranged inside the removing tower 1 and is positioned above the tubular demister 14,
and the second demisting layer 16 is arranged inside the removing tower 1, is arranged at intervals with the first demisting layer 15 and is positioned above the first demisting layer 15, and the flue gas sequentially passes through the tubular demister 14, the first demisting layer 15 and the second demisting layer 16.
In this embodiment, in order to make in advance defogging layer 8 can not only the defogging impurity that can also get rid of big granule, remove fog layer 16 through tubular defroster 14, first defogging layer 15 and second and cooperate the defogging for before flue gas and aqueous ammonia contact, can leading carry out the defogging edulcoration, and in advance defogging layer 8 can reduce the velocity of flow of flue gas, make the abundant contact of aqueous ammonia and flue gas.
The removing tower 1 is detachably connected with the first demisting layer 15, the second demisting layer 16 and the terminal demisting layer 11 through hexagon bolts.
Further, still include:
a separation louver layer 17 arranged between the absorption spray layer 5 and the SO3Between the removing layer 7, further between the absorbing spray layer 5 and the pre-demisting layer 8, comprising
A control member 18, disposed inside the stripping column 1,
In this embodiment, in order to make the sintering flue gas have ultralow SO in the system3In the removal device, the SO located below2Can be sufficiently reacted by the absorption of SO and the shower layer 53The separation louver layers 17 are arranged between the removing layers 7, the control piece 18 controls the louver blades 19 to rotate, the upper portion of the absorption spraying layer 5 can be covered, a small amount of gas can pass through the covered portion, but most of the gas can be prevented from being discharged upwards, and at the moment, the absorption spraying layer 5 located below can be fully reacted with smoke.
In addition, the separation louver layer 17 also has the function of air distribution, so that the flue gas can be uniformly distributed in the interior of the removal tower 1.
Furthermore, the control part 18 is provided with teeth, the control part 18 is movably arranged in the removing tower 1, one end of the control part passes through the inner wall of the removing tower 1 and then is used for being connected with a linear power source, the louver blade 19 is provided with a gear, the rotating shaft of the louver blade 19 on the inner wall of the removing tower 1 is vertical to the arrangement direction of the control part 18, and after the control part 18 moves, the louver blade 19 is controlled to rotate on the inner wall of the removing tower 1 through the meshing relationship of the teeth and the teeth of the gears.
In this embodiment, a specific form of rotation of the louvres 19 is provided. Because louvre 19 is a plurality of, if use control 18 to control louvre 19's turned angle respectively, it is asynchronous to probably make louvre 19's swing, interferes the collision each other, causes the dead phenomenon of card, and it sets up in the inside of desorption tower 1, highly also in the position in the middle, and the maintenance is very inconvenient, in case the problem appears, is difficult to solve fast. Therefore, the control element 18 is used for synchronously controlling the rotation of the louvres 19, so that a plurality of louvres 19 can synchronously rotate in parallel, the control element 18 only needs to move linearly, and the control element 18 and the inner wall of the removal tower can be sealed by adopting a linear sealing element.
Further, in order to make the sealing between the control part 18 and the removing tower 1 better, the control part 18 and the inner wall of the removing tower do not move relatively, and a static sealing relationship is formed between the control part 18 and the inner wall of the removing tower, specifically, the control part 18 can be divided into a tooth section with teeth and a driving section, the driving section is provided with a telescopic cylinder, the telescopic cylinder can be an air cylinder or an oil cylinder, because the required driving force is not large, the air cylinder is generally selected for driving, a cylinder body of the telescopic cylinder is arranged on the inner wall of the removing tower 1, and a telescopic end of the telescopic cylinder extends into the removing tower to drive the teeth to move linearly, so that the sealing effect between the control part 18 and the removing tower 1 is better.
Further, the swing of shutter 19 can control the wind direction of flue gas, can also evenly distribute the wind.
Further, the partition louver layer 17 has two, one is disposed between the absorption shower layer 5 and the SO3And the other one is arranged between an ammonia water spraying layer 10 and a tail end demisting layer 11.
In this embodiment, the effect of two separation louver layers 17 is different for each part, and one is located between absorption spray layer 5 and the defogging layer 8 in advance, and the other is located between ammonia water spray layer 10 and the terminal defogging layer 11, and louver 19 swings the back for only a small amount of flue gas can pass the gap between louver 19, slows down the discharge velocity of flue gas.
The two layers of the separated louver layers 17 have various use forms, the two layers of the separated louver layers 17 are in a closed state, the smoke gas amount in the area between the two layers is small, and the spraying of the ammonia water spraying layer 10 is not facilitated, so that the use is generally carried out in a state that one layer is opened and the other layer is closed.
The first state: only when the separating louver layer 17 between the ammonia water spraying layer 10 and the tail end defogging layer 11 is in an approximately closed state, the smoke is gathered below the separating louver layer 17 at the position, the upward speed of the smoke passing through the separating louver layer 17 is reduced, the later smoke is discharged upwards, the smoke can be accumulated at the ammonia water spraying layer 10 and the pre-defogging layer 8, the upper layer speed is reduced, the smoke passes through the ammonia water spraying layer 10 and the pre-defogging layer 8 after the density of the smoke is increased, and the smoke passes through the ammonia water spraying layer 10 and the pre-defogging layer 8 repeatedly, so that the ammonia water spraying layer 10 and the pre-defogging layer 8 are recycled, and the utilization rate is improved.
And a second state: only when the separation louver layer 17 between the absorption spraying layer 5 and the pre-demisting layer 8 is in an approximately closed state, the flue gas is gathered at the absorption spraying layer 5, so that the flue gas can be in sufficient contact with the absorption spraying layer.
Generally, the first use state or the second use state is selected according to the specific content of impurities in the flue gas, and the swing angle of the louver blades 19 can be adjusted according to the actual situation.
Further, the first demisting layer 15, the second demisting layer 16 and the terminal demisting layer 11 are all chevron-shaped demisters, and each has a cleaning nozzle 20.
In this embodiment, the cleaning nozzle 20 is used to clean the first defogging layer 15, the second defogging layer 16 and the terminal defogging layer 11, and operates intermittently.
Further, the transfer pump 12 has two, and the aqueous ammonia shower layer 10 is communicated with the aqueous ammonia storage tank 13 through any one of the transfer pumps 12.
In this embodiment, two transfer pumps 12 are provided, and are connected in parallel to serve as a backup.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. SO in sintering flue gas ultralow emission system3A removal device, comprising:
a removing tower (1), the bottom of which is used for containing alkaline slurry (2) and is provided with a flue gas inlet (3) and a flue gas outlet (4),
the absorption spraying layer (5) is arranged inside the desorption tower (1), the absorption spraying layer (5) is communicated with the alkaline slurry (2) through a circulating pump, the flue gas inlet (3) is positioned between the liquid level (6) of the alkaline slurry (2) and the absorption spraying layer (5),
it is characterized by also comprising:
SO3the removing layer (7) is arranged inside the removing tower (1), is positioned above the absorbing and spraying layer (5), is positioned below the flue gas outlet (4), and comprises a pre-removing fog layer (8), a packing layer (9), an ammonia water spraying layer (10) and a tail-end removing fog layer (11) which are sequentially arranged from bottom to top, wherein the ammonia water spraying layer (10) is communicated with an ammonia water storage tank (13) through a delivery pump (12) and is used for spraying ammonia water into the removing tower (1), and flue gas is contacted with the ammonia water sprayed by the ammonia water spraying layer (10) after passing through the packing layer (9),
a separation louver layer (17), the separation louver layer (17) having two, one arranged between the absorption spray layer (5) and the SO3Between desorption layer (7), another setting is in aqueous ammonia sprays layer (10) and between terminal defogging layer (11), separate louver layer (17) all include:
a control member (18) arranged inside the stripping column (1),
shutter plate (19), a plurality of has, all rotates to be set up desorption tower (1) inner wall, control (18) drive a plurality of shutter plate (19) rotate, a plurality of shutter plate (19) rotate the back, absorb spray layer (5) with SO3The channels between the removal layers (7) become larger or smaller,
the control piece (18) is provided with teeth, the control piece (18) is movably arranged inside the removing tower (1), one end of the control piece penetrates through the inner wall of the removing tower (1) and then is connected with a power source, the louver blade (19) is provided with a gear, the rotating shaft of the louver blade (19) on the inner wall of the removing tower (1) is perpendicular to the arrangement direction of the control piece (18), and after the control piece (18) moves, the louver blade (19) is controlled to rotate on the inner wall of the removing tower (1) through the meshing relationship of the teeth and the teeth.
2. The ultralow-emission system for SO in sintering flue gas as set forth in claim 13A removal device, characterized in that the pre-demisting layer (8) comprises:
a tubular demister (14) arranged inside the desorption tower (1) and positioned above the absorption spraying layer (5),
a first demisting layer (15) which is arranged in the interior of the removing tower (1) and is positioned above the tubular demister (14),
and the second demisting layer (16) is arranged in the removing tower (1), is arranged at intervals with the first demisting layer (15), is positioned above the first demisting layer (15), and is used for allowing flue gas to sequentially pass through the tubular demister (14), the first demisting layer (15) and the second demisting layer (16).
3. The ultralow-emission system for SO in sintering flue gas as set forth in claim 23The removing device is characterized in that the first demisting layer (15), the second demisting layer (16) and the tail end demisting layer (11) are all herringbone demisters and are provided with cleaning spray heads (20).
4. The ultralow-emission system for SO in sintering flue gas as set forth in claim 13The removing device is characterized in that the number of the delivery pumps (12) is two, and the ammonia water spraying layer (10) is communicated with the ammonia water storage tank (13) through any one of the delivery pumps (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210038852.4A CN114307606A (en) | 2022-01-13 | 2022-01-13 | SO in sintering flue gas ultralow emission system3Removing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210038852.4A CN114307606A (en) | 2022-01-13 | 2022-01-13 | SO in sintering flue gas ultralow emission system3Removing device |
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| CN114307606A true CN114307606A (en) | 2022-04-12 |
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| CN202210038852.4A Pending CN114307606A (en) | 2022-01-13 | 2022-01-13 | SO in sintering flue gas ultralow emission system3Removing device |
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