CN116808803B - Desulfurization system - Google Patents
Desulfurization system Download PDFInfo
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- CN116808803B CN116808803B CN202311087998.9A CN202311087998A CN116808803B CN 116808803 B CN116808803 B CN 116808803B CN 202311087998 A CN202311087998 A CN 202311087998A CN 116808803 B CN116808803 B CN 116808803B
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- flue gas
- tower body
- desulfurization
- desulfurization slurry
- wall
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 200
- 230000023556 desulfurization Effects 0.000 title claims abstract description 200
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 155
- 239000003546 flue gas Substances 0.000 claims abstract description 155
- 239000002002 slurry Substances 0.000 claims abstract description 149
- 230000007246 mechanism Effects 0.000 claims abstract description 106
- 238000005507 spraying Methods 0.000 claims abstract description 88
- 238000012856 packing Methods 0.000 claims abstract description 62
- 239000000779 smoke Substances 0.000 claims abstract description 26
- 238000001556 precipitation Methods 0.000 claims description 61
- 230000003647 oxidation Effects 0.000 claims description 52
- 238000007254 oxidation reaction Methods 0.000 claims description 52
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 40
- 230000003009 desulfurizing effect Effects 0.000 claims description 31
- 238000009827 uniform distribution Methods 0.000 claims description 29
- 239000010865 sewage Substances 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 21
- 238000004537 pulping Methods 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000003860 storage Methods 0.000 claims description 13
- 230000004308 accommodation Effects 0.000 claims description 10
- 230000001502 supplementing effect Effects 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 5
- 239000013589 supplement Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 15
- 239000000945 filler Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 239000003595 mist Substances 0.000 description 1
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- 239000002244 precipitate Substances 0.000 description 1
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- 239000002594 sorbent Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The invention provides a desulfurization system, and belongs to the technical field of thermal power plant desulfurization. Comprising the following steps: the flue gas guiding mechanism, the first packing layer, the first spraying mechanism, the second packing layer and the second spraying mechanism are arranged in the tower body along the flue gas flowing direction; the flue gas guiding mechanism forms a first flue gas channel at the middle part of the tower body; the first packing layer is arranged above the first flue gas channel through the first mounting frame, is not contacted with the inner wall of the tower body, and forms a second flue gas channel with the inner wall of the tower body; the first spraying mechanism is used for spraying desulfurization slurry to the second flue gas channel and the first packing layer; the second filling layer is arranged above the second flue gas channel through a second mounting frame and is contacted with the inner wall of the tower body, and the second mounting frame forms a third flue gas channel at the middle part of the tower body; the second spraying mechanism is used for spraying desulfurization slurry to the second packing layer and the third flue gas channel. The invention has simple structure and low manufacturing cost, can effectively reduce the phenomenon of smoke adherence flow and improve the desulfurization efficiency.
Description
Technical Field
The invention relates to the technical field of desulfurization of thermal power plants, in particular to a desulfurization system.
Background
The desulfurization working principle of the desulfurization tower is generally based on wet desulfurization technology, and is mainly divided into two steps of absorption and reaction: the absorption steps are as follows: when sulfur dioxide flue gas generated in the combustion process enters a desulfurizing tower, the sulfur dioxide flue gas contacts an absorbent (usually alkaline solution) sprayed into the desulfurizing tower; a commonly used sorbent is limestone slurry (a mixture of limestone and water); the reaction steps are as follows: in the desulfurizing tower, sulfate ions react with alkaline components (such as calcium hydroxide or ammonia) in the absorbent. The chemical reactions occurring in this process will produce sulfate compounds which precipitate and thereby remove sulfur dioxide from the flue gas. Through continuous circulation and replenishment of the absorbent, the desulfurizing tower can continuously remove sulfur dioxide, SO that SO in the flue gas 2 The concentration is reduced to a level that meets environmental emission standards.
The main technical problems existing in the prior art are as follows: first, increase the tray in the desulfurizing tower inside, improve flue gas flow homogeneity, improve the desulfurization efficiency of desulfurizing tower, reduce the emission of dust simultaneously. However, the traditional tray can not reduce the phenomenon of smoke adherence flow in the desulfurizing tower caused by the fact that liquid slurry particles near the tower wall are adsorbed by the tower wall, so that the desulfurizing and dedusting effects are not ideal; the invention provides an improvement scheme, such as opening holes in the middle part of a tray, sealing the edge annular region, opening the holes in the middle part of the tray by 0.3-0.5, and keeping the distance from the inner edge of the non-opening region to the inner wall of the tower by 1% D-5% D, wherein D is the inner diameter of the desulfurizing tower, the non-opening region of the tray is tilted upwards, and an included angle of 120-150 degrees is formed between the non-opening region and the opening region, so that the relative deviation of the flue gas velocity at the spraying layer in the tower can be improved by more than 10%, the flue gas wall-attaching phenomenon in the desulfurizing tower can be effectively reduced, the environment-friendly and economic benefits are realized, and the flue gas wall-attaching phenomenon still exists.
Yet another problem in the prior art is: the desulfurizing tower has large volume, the venturi structure and the dome structure are improved through the finite element analysis result, as shown in fig. 10 and 11, although the flow field distribution of the system can be improved, the operation efficiency of the system is improved, the problem of the smoke adherence flow is reduced, the smoke flow rate in the tower is reduced, the smoke is fully expanded and uniformly distributed in the tower, the diameter of the tower body is greatly increased, the height of the tower body is increased, and the manufacturing cost and the construction difficulty of the desulfurizing tower are caused by adopting the strength of the connection of the venturi structure and the dome structure.
Therefore, in the prior art, the phenomenon of smoke adherence wall flow generated after liquid slurry particles near the tower wall are adsorbed by the tower wall exists, so that the desulfurization and dust removal effects are not ideal enough, in addition, the desulfurization tower is connected by adopting a Venturi structure and a dome-shaped space structure, and the manufacturing cost and the construction difficulty of the desulfurization tower are improved.
Disclosure of Invention
The embodiment of the invention aims to provide a desulfurization system which is used for solving the defects that in the prior art, the phenomenon of smoke wall-attached flow generated after liquid slurry particles near the tower wall are adsorbed by the tower wall is not ideal enough in desulfurization and dust removal effects, and a venturi structure and a dome-shaped and space-square structure are adopted for connection of a desulfurization tower, so that the cost and construction difficulty of the desulfurization tower are high.
In order to achieve the above object, an embodiment of the present invention provides a desulfurization system including:
the tower body is internally provided with a desulfurization component, and flue gas enters the tower body from a flue gas inlet at the bottom of the tower body and is discharged from a flue gas outlet at the top of the tower body after desulfurization by the desulfurization component;
the desulfurization assembly includes:
the flue gas guiding mechanism, the first packing layer, the first spraying mechanism, the second packing layer and the second spraying mechanism are sequentially arranged along the flue gas flowing direction;
the flue gas guiding mechanism is arranged on the inner wall of the tower body, and a first flue gas channel is formed in the middle of the tower body;
the first packing layer is arranged in the tower body through a first mounting frame and is positioned above the first smoke channel, the first packing layer is not contacted with the inner wall of the tower body, and a second smoke channel is formed between the first mounting frame and the inner wall of the tower body;
the first spraying mechanism is arranged in the tower body, is opposite to the second flue gas channel and the first packing layer, and is used for spraying desulfurization slurry to the second flue gas channel and the first packing layer to react with sulfur dioxide in flue gas;
the second packing layer is arranged on the tower body through a second mounting frame and is positioned above the second flue gas channel, the second packing layer is in contact with the inner wall of the tower body, and a third flue gas channel is formed in the middle of the tower body by the second mounting frame;
The second spraying mechanism is arranged in the tower body, is opposite to the second packing layer and the third flue gas channel and is used for spraying desulfurization slurry to the second packing layer and the third flue gas channel to react with sulfur dioxide in flue gas.
Optionally, a demister is arranged above the second spraying mechanism in the tower body, and the demister is used for removing liquid drops entrained in the gas;
an alloy tray is arranged below the smoke guide mechanism in the tower body, and a plurality of smoke through holes are formed in the alloy tray at intervals.
Optionally, an oxidation precipitation area is arranged at the bottom end of the tower body, the oxidation precipitation area is used for collecting desulfurization slurry sprayed out by the first spraying mechanism and the second spraying mechanism, and the flue gas inlet is positioned above the oxidation precipitation area;
a gas supply pipeline and a stirrer are arranged in the tower body, and are both positioned in the oxidation precipitation zone, and the gas supply pipeline is used for supplying oxidation gas into the tower body; the stirrer is used for stirring the desulfurization slurry;
the bottom of the oxidation and precipitation area is provided with a first sewage drain pipe, and a first sewage drain pump is arranged on the first sewage drain pipe.
Optionally, the desulfurization system further includes:
the desulfurization slurry supplementing mechanism is used for supplementing desulfurization slurry to the oxidation precipitation zone;
the desulfurization slurry replenishing mechanism includes:
a storage tank for storing a desulfurizing agent;
the pulping tank is connected with the storage tank and the water inlet pipeline and used for mixing the desulfurizing agent and water to prepare desulfurizing slurry, and the pulping tank is communicated to the oxidation precipitation zone through a first pipeline and used for supplementing the desulfurizing slurry to the oxidation precipitation zone;
the first pipeline is provided with a first desulfurization slurry conveying pump.
Optionally, the desulfurization system further includes:
the desulfurization slurry circulating mechanism is used for pumping desulfurization slurry into the first spraying mechanism and the second spraying mechanism;
the desulfurization slurry circulation mechanism includes:
the inlet of the desulfurization slurry circulating pool is communicated with the oxidation precipitation zone, and the outlet of the desulfurization slurry circulating pool is respectively communicated with the first spraying mechanism and the second spraying mechanism through corresponding second pipelines;
each second pipeline is provided with a second desulfurization slurry conveying pump and a valve;
the bottom of the desulfurization slurry circulating pool is provided with a second sewage drain pipe, and a second sewage drain pump is arranged on the second sewage drain pipe;
The outlet of the desulfurization slurry circulating pool is also connected with a corresponding second pipeline through a standby pipeline, and a third desulfurization slurry conveying pump and a valve are arranged on the standby pipeline.
Optionally, the desulfurization system further includes:
the liquid level detection mechanism is arranged in the oxidation precipitation zone and the desulfurization slurry circulating pool and is used for controlling the desulfurization slurry supplementing mechanism to supplement desulfurization slurry into the oxidation precipitation zone when the liquid level in the oxidation precipitation zone is lower than a first set value and generating an alarm when the liquid level in the desulfurization slurry circulating pool is lower than a second set value; the second set value is smaller than the first set value.
Optionally, the flue gas guiding mechanism includes:
the support plate is fixed on the inner wall of the tower body, and a plurality of leakage holes are formed in the support plate at intervals;
the guide piece is vertically arranged in the middle of the supporting disc, and the middle of the supporting disc and the guide piece is hollow to form the first flue gas channel;
the hollow flow guide pipes are arranged on the lower end face of the supporting disc, and each flow guide pipe is communicated with a corresponding leak hole;
and one end of each supporting rib is connected with the outer wall of the flow guide piece, and the other end is connected with the inner wall of the tower body.
Optionally, the first mounting frame includes:
the first uniform distribution plate is provided with a first side wall on the upper end face, a first accommodating space is formed between the first uniform distribution plate and the first side wall, the first packing layer is positioned in the first accommodating space, a plurality of uniform distribution holes are formed in the first uniform distribution plate at intervals, and a second flue gas channel is formed between the first side wall and the inner wall of the tower body;
the connecting rods are arranged at intervals, one end of each connecting rod is connected with the first side wall, the other end of each connecting rod is connected with the inner wall of the tower body, or the connecting rods are arranged at intervals, the end of each connecting rod is connected with the inner wall of the tower body, a horizontal mounting surface is formed among the connecting rods, and the first uniform distribution plate is arranged on the connecting rods and positioned on the mounting surface.
Optionally, the second mounting frame includes:
the second equipartition board, the second equipartition board is connected with the inner wall of tower body, the middle part position of second equipartition board is provided with the passageway, second equipartition board up end is provided with the second lateral wall, the second equipartition board the second lateral wall with constitute the second accommodation space between the inner wall of tower body, the second packing layer is located in the second accommodation space, the interval is provided with a plurality of equipartition holes on the second equipartition board, the second lateral wall with form the third flue gas passageway between the passageway of second equipartition board middle part position.
Optionally, the first spraying mechanism includes:
the first spraying sub-mechanism is arranged in the tower body, is opposite to the second flue gas channel and is used for spraying desulfurization slurry to the second flue gas channel to react with sulfur dioxide in the flue gas;
the second spraying sub-mechanism is arranged in the tower body, is opposite to the first packing layer, is positioned above the first spraying sub-mechanism and is used for spraying desulfurization slurry to the first packing layer to react with sulfur dioxide in the flue gas.
According to the technical scheme, the smoke flow path is limited through the smoke guide mechanism, and meanwhile, the first packing layer, the first spraying mechanism, the second packing layer and the second spraying mechanism are combined, so that the targeted treatment of smoke is realized, the structure is simple, the manufacturing cost is low, and the use of the profile special-shaped structure is reduced; and the wall-attached flow phenomenon of the flue gas can be effectively reduced, the desulfurization efficiency, the desulfurization effect and the service life are improved, and the environmental protection and economic benefits are better.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain, without limitation, the embodiments of the invention. In the drawings:
FIG. 1 is a schematic view of a first desulfurization system according to the present invention;
FIG. 2 is a schematic diagram of a second desulfurization system according to the present invention;
FIG. 3 is a bottom view of the smoke guide mechanism provided by the present invention;
FIG. 4 is a schematic cross-sectional view of a smoke guiding mechanism provided by the invention;
FIG. 5 is a schematic view of a first mounting bracket according to the present invention;
FIG. 6 is a schematic view of a second first mount according to the present invention;
FIG. 7 is a schematic view of a second mounting bracket according to the present invention;
FIG. 8 is a top view of a first spray sub-mechanism provided by the present invention;
FIG. 9 is a top view of a second spray sub-mechanism provided by the present invention;
FIG. 10 is a schematic view of a first desulfurizing tower according to the prior art;
FIG. 11 is a schematic view of a second desulfurizing tower according to the prior art.
Description of the reference numerals
1-a tower body; 2-a smoke guiding mechanism; 3-a first filler layer;
4-a first spraying mechanism; 5-a second filler layer; 6-a second spraying mechanism;
7-a desulfurization slurry replenishing mechanism; 8-a desulfurization slurry circulation mechanism; 9-a liquid level detection mechanism;
11-a demister; 12-alloy tray; 13-oxidizing and precipitating area;
14-a gas supply line; 15-a stirrer; 16-a first sewage drain;
17-a first sewage pump; 21-a support plate; 22-a flow guide;
23-a flow guiding pipe; 24-supporting ribs; 31-a first mounting frame;
41-a first spray sub-mechanism; 42-a second spray sub-mechanism; 51-a second mount;
71-a storage tank; 72-pulping tank; 73-a water inlet pipeline;
74-a first conduit; 75-a first desulfurization slurry delivery pump; 81-a desulfurization slurry circulating tank;
82-a second conduit; 83-a second desulfurization slurry delivery pump; 84-valve;
85-a second sewage drain; 86-a second sewage pump; 87-spare pipe;
88-a third desulfurization slurry delivery pump; 101-a flue gas inlet; 102-a flue gas outlet;
103-venturi structure; 104-a nozzle; 105-dome space structure;
121-smoke through holes; 201-a first flue gas channel; 301-a second flue gas channel;
302-uniformly distributing holes; 501-a third flue gas channel; 211-leak holes;
311-a first uniform distribution plate; 312-a first sidewall; 313-a first accommodation space;
314-connecting rods; 511-a second equipartition plate; 512-second sidewalls;
513-a second accommodation space.
Detailed Description
The following describes the detailed implementation of the embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In the embodiments of the present invention, unless otherwise indicated, terms such as "upper, lower, left, and right" and "upper, lower, left, and right" are used generally referring to directions or positional relationships based on those shown in the drawings, or those conventionally used in the use of the inventive products. "inner and outer" means either within or outside the space shown in the structure of the drawings.
The terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
The terms "parallel", "perpendicular", and the like do not denote that the components are required to be absolutely parallel or perpendicular, but may be slightly inclined. For example, "parallel" merely means that the directions are more parallel than "perpendicular" and does not mean that the structures must be perfectly parallel, but may be slightly tilted.
The terms "horizontal," "vertical," "overhang," and the like do not denote that the component is required to be absolutely horizontal, vertical, or overhang, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
Furthermore, the terms "substantially," "essentially," and the like, are intended to be limited to the precise form disclosed herein and are not necessarily intended to be limiting. For example: the term "substantially equal" does not merely mean absolute equal, but is difficult to achieve absolute equal during actual production and operation, and generally has a certain deviation. Thus, in addition to absolute equality, "approximately equal to" includes the above-described case where there is a certain deviation. In other cases, the terms "substantially", "essentially" and the like are used in a similar manner to those described above unless otherwise indicated.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
FIG. 1 is a schematic view of a first desulfurization system according to the present invention; FIG. 2 is a schematic diagram of a second desulfurization system according to the present invention; FIG. 3 is a bottom view of the smoke guide mechanism provided by the present invention; FIG. 4 is a schematic cross-sectional view of a smoke guiding mechanism provided by the invention; FIG. 5 is a schematic view of a first mounting bracket according to the present invention; FIG. 6 is a schematic view of a second first mount according to the present invention; FIG. 7 is a schematic view of a second mounting bracket according to the present invention; FIG. 8 is a top view of a first spray sub-mechanism provided by the present invention; fig. 9 is a top view of a second spray sub-mechanism provided by the present invention.
As shown in fig. 1-2, the present embodiment provides a desulfurization system including:
the tower body 1 is internally provided with a desulfurization component, flue gas enters the tower body 1 from a flue gas inlet 101 at the bottom of the tower body 1, and is discharged from a flue gas outlet 102 at the top of the tower body 1 after desulfurization by the desulfurization component;
the desulfurization assembly includes:
the flue gas guiding mechanism 2, the first packing layer 3, the first spraying mechanism 4, the second packing layer 5 and the second spraying mechanism 6 are sequentially arranged along the flue gas flowing direction;
the flue gas guiding mechanism 2 is arranged on the inner wall of the tower body 1, and a first flue gas channel 201 is formed in the middle of the tower body 1;
the first packing layer 3 is arranged in the tower body 1 through a first mounting frame 31 and is positioned above the first flue gas channel 201, and the first mounting frame 31 is not contacted with the inner wall of the tower body 1 and forms a second flue gas channel 301 with the inner wall of the tower body 1;
the first spraying mechanism 4 is arranged in the tower body 1, is opposite to the second flue gas channel 301 and the first packing layer 3, and is used for spraying desulfurization slurry to the second flue gas channel 301 and the first packing layer 3 to react with sulfur dioxide in flue gas;
the second packing layer 5 is arranged on the tower body 1 through a second mounting frame 51 and is positioned above the second flue gas channel 301, the second packing layer 5 is in contact with the inner wall of the tower body 1, and the second mounting frame 51 forms a third flue gas channel 501 in the middle of the tower body 1;
The second spraying mechanism 6 is disposed in the tower body 1, opposite to the second packing layer 5 and the third flue gas channel 501, and is used for spraying desulfurization slurry to the second packing layer 5 and the third flue gas channel 501 to react with sulfur dioxide in flue gas.
In this embodiment, the tower body 1 may be configured as a hollow cylindrical tower body, a rectangular tower body, or the like, and the corresponding smoke guiding mechanism 2, the first packing layer 3, the first spraying mechanism 4, the second packing layer 5, and the second spraying mechanism 6 are matched with the structure of the tower body 1.
Specifically, a flue gas guiding mechanism 2 is arranged in the tower body 1, the flue gas guiding mechanism 2 is fixed with the inner wall of the tower body 1, a first flue gas channel 201 is formed in the axial direction of the middle position of the tower body 1, flue gas is only transmitted upwards through the first flue gas channel 201, the flow speed of the flue gas is increased, and meanwhile, the wall flow effect of the flue gas is reduced; after the flue gas passes through the first flue gas channel 201, the first packing layer 3 arranged above the first flue gas channel 201 is in contact with the flue gas, and as the first packing layer 3 is arranged in the middle of the axial direction of the tower body 1 through the first mounting frame 31, the flue gas directly contacts with the first packing layer 3, and most of the flue gas passes through spherical packing in the first packing layer 3, so that the contact area between desulfurization slurry and the flue gas is further increased, the desulfurization efficiency is improved, and a small part of the flue gas is upwards transmitted from the second flue gas channel 301 formed by the first mounting frame 31 and the inner wall of the tower body 1, and in the process, the first spraying mechanism 4 can spray desulfurization slurry downwards to react with sulfur dioxide in the flue gas; the reacted flue gas continues to move upwards to reach the second packing layer 5, and as the second packing layer 5 is arranged on the inner wall of the tower body 1 through the second mounting frame 51 and is contacted with the inner wall of the tower body 1, the second mounting frame 51 forms a third flue gas channel 501 in the axial direction of the tower body 1, most of flue gas is conveyed upwards from the third flue gas channel 501, and a small part of flue gas enters the second packing layer 5, so that the edge slipping problem of flue gas at the tower wall position is further reduced, and the contact area between desulfurization slurry and the flue gas is further increased; meanwhile, the second spraying mechanism 6 sprays desulfurization slurry to the second packing layer 5 and the third flue gas channel 501, reacts with sulfur dioxide still existing in the flue gas, and further removes sulfur dioxide in the flue gas.
In this embodiment, the spherical filler in the first filler layer 3 and the second filler layer 5 is formed by two hemispheres, each hemisphere is provided with 12 half fan-shaped blades, the fan-shaped blades of the two hemispheres are staggered with each other, the middle part of the multi-surface hollow sphere is provided with a reinforcing ring along the whole circumference, the upper part and the lower part of the ring are respectively provided with twelve spherical petals, the upper spherical petals and the lower spherical petals are staggered with each other and are radially arranged along the central axis, so that the mass transfer area can be further increased, and the desulfurization effect is improved.
Further, as shown in fig. 2, a demister 11 is disposed in the tower body 1 above the second spraying mechanism 6, and the demister 11 is used for removing liquid droplets entrained in the gas.
Specifically, the demister 11 is also called as a demister gas distributor, and can effectively remove mist of 3-5 um. In the present embodiment, a cleaning water pipe is connected to the demister 11, and water is supplied through the cleaning water pipe to clean the demister 11.
Further, as shown in fig. 2, an alloy tray 12 is disposed in the tower body 1 below the flue gas guiding mechanism 2, and a plurality of flue gas through holes 121 are disposed on the alloy tray 12 at intervals.
Specifically, the alloy tray 12 is arranged in the tower body 1, so that the flow uniformity of the flue gas can be improved, and the flue gas is conveyed upwards through the flue gas through holes 121, so that the desulfurization efficiency of the desulfurization tower is improved, and meanwhile, the emission of dust is reduced. The smoke through-holes 121 may be provided as hexagonal holes.
Further, as shown in fig. 2, an oxidation and precipitation area 13 is disposed at the bottom end of the tower body 1, the oxidation and precipitation area 13 is used for collecting desulfurization slurry sprayed by the first spraying mechanism 4 and the second spraying mechanism 6, and the flue gas inlet 101 is located above the oxidation and precipitation area 13;
a gas supply pipeline 14 and a stirrer 15 are arranged in the tower body 1 and are both positioned in the oxidation precipitation zone 13, and the gas supply pipeline 14 is used for supplying oxidizing gas to the flue gas in the tower body 1; the stirrer 15 is used for stirring the desulfurization slurry;
the bottom of the oxidation and precipitation zone 13 is provided with a first sewage drain pipe 16, and the first sewage drain pipe 16 is provided with a first sewage drain pump 17.
Specifically, the bottom end of the tower body 1 is of a closed structure, so that an oxidation and precipitation area 13 is formed at the bottom end of the tower body 1, and desulfurization slurry sprayed out by the first spraying mechanism 4 and the second spraying mechanism 6 flows downwards due to gravity after contact reaction with flue gas and finally is converged in the oxidation and precipitation area 13.
In addition, a gas supply pipe 14 is provided in the tower 1, and the gas supply pipe 14 is located in the oxidation and precipitation zone 13 and is normally located above the liquid surface of the collected desulfurization slurry, so that the reaction effect between the desulfurization slurry and the flue gas is improved by feeding the oxidation gas into the tower 1. The gas supply pipe 14 is radially connected with a plurality of Y-shaped nozzles, and oxidized air is supplied to the gas supply pipe 14 by an air blower provided outside the tower body 1.
More specifically, in the spraying process, the desulfurization slurry has certain loss, so that the desulfurization slurry needs to be supplemented into the tower body, and in order to make the supplemented desulfurization slurry and the desulfurization slurry converged in the oxidation precipitation zone 13 convect and uniformly mix, a stirrer 15 is arranged in the oxidation precipitation zone 13 at the bottom end of the tower body 1 and used for stirring the desulfurization slurry, so that the desulfurization slurry is uniformly mixed, the reaction effect of the desulfurization slurry and the flue gas is ensured, the stirrer 15 is driven to rotate by a motor arranged outside the tower body 1, and a propeller type stirrer can be adopted.
Because the desulfurization slurry reacts with the flue gas to form sulfate and is precipitated at the bottom end of the oxidation and precipitation zone 13, a first sewage drain pipe 16 is arranged at the bottom of the oxidation and precipitation zone 13, a first sewage drain pump 17 is arranged on the first sewage drain pipe 16, the precipitated sulfate is removed, specifically, the bottom of the oxidation and precipitation zone 13 is provided with an inclined plane, and a pipe opening of the first sewage drain pipe 16 is arranged at the lowest position of the inclined plane so as to ensure the sewage drain effect.
Further, as shown in fig. 2, the desulfurization system further includes:
a desulfurization slurry replenishing mechanism 7, which is communicated with the oxidation precipitation zone 13 and is used for replenishing desulfurization slurry to the oxidation precipitation zone 13;
The desulfurization slurry replenishing mechanism 7 includes:
a storage tank 71 for storing a desulfurizing agent;
a pulping tank 72 connected to the storage tank 71 and the water inlet pipe 73 for mixing the desulfurizing agent and water to obtain a desulfurizing slurry, the pulping tank 72 being connected to the oxidation-precipitation zone 13 through a first pipe 74 for supplementing the desulfurizing slurry to the oxidation-precipitation zone 13;
the first pipeline 74 is provided with a first desulfurization slurry delivery pump 75.
In this embodiment, the desulfurizing agent is typically lime powder; the storage tank 71 is provided above the pulping tank 72 and connected by a pipe. When desulfurization slurry is required to be added into the tower body 1, a certain amount of lime powder is conveyed into the pulping tank 72 through the storage tank 71, a certain amount of water is injected into the pulping tank 72 through the water inlet pipeline 73, the desulfurization slurry is formed by stirring, and the desulfurization slurry is conveyed to the oxidation and precipitation zone 13 through the first pipeline 74 and the first desulfurization slurry conveying pump 75 arranged on the first pipeline 74 to supplement the desulfurization slurry. By adopting the mode, the preparation of the slurry is carried out when the desulfurization slurry is needed to be supplemented, so that the activity can be ensured, and the reaction efficiency of the flue gas and sulfur dioxide can be improved.
In another embodiment, the oxidation-precipitation zone 13 is further connected to the pulping tank 72 through a pipeline, and in the case that the liquid levels of the desulfurization slurry in the oxidation-precipitation zone 13 and the desulfurization slurry circulation tank 81 meet corresponding set values, the concentration of alkaline ions in the desulfurization slurry circulation tank 81 is detected, and if the concentration is smaller than the set value of the concentration, the desulfurization slurry collected in the oxidation-precipitation zone 13 is conveyed into the pulping tank 72, and a certain amount of desulfurizing agent is added through the storage tank 71 to increase the concentration of alkaline ions in the desulfurization slurry, and then conveyed back into the oxidation-precipitation zone 13 for desulfurization circulation.
Further, as shown in fig. 2, the desulfurization system further includes:
the inlet end of the desulfurization slurry circulation mechanism 8 is connected with the oxidation precipitation zone 13, and the outlet end of the desulfurization slurry circulation mechanism 8 is communicated with the first spraying mechanism 4 and the second spraying mechanism 6 and is used for pumping desulfurization slurry into the first spraying mechanism 4 and the second spraying mechanism 6;
the desulfurization slurry circulation mechanism 8 includes:
the inlet of the desulfurization slurry circulation tank 81 is communicated with the oxidation precipitation zone 13, and the outlet of the desulfurization slurry circulation tank 81 is respectively communicated with the first spraying mechanism 4 and the second spraying mechanism 6 through corresponding second pipelines 82;
a second desulfurization slurry delivery pump 83 and a valve 84 are provided on each second conduit 82;
specifically, by the operating power of the second desulfurization slurry delivery pump 83 provided on the second pipe 82 and the opening degree of the valve 84, the pressure and flow rate of the desulfurization slurry entering the first shower mechanism 4 and the second shower mechanism 6 can be controlled, enabling precise control.
In addition, the inlet of the desulfurization slurry circulation tank 81 is connected with the oxidation-precipitation zone 13 through a pipe, and the position of the pipe is spaced apart from the bottom end surface of the oxidation-precipitation zone 13 by a certain distance, so that the sulfate deposited on the oxidation-precipitation zone 13 is reduced as much as possible and enters the desulfurization slurry circulation tank 81.
Further, as shown in fig. 2, a second sewage drain pipe 85 is disposed at the bottom of the desulfurization slurry circulation tank 81, and a second sewage drain pump 86 is disposed on the second sewage drain pipe 85.
In the present embodiment, although the first drain pipe 16 is already provided at the bottom of the chemical precipitation zone 13, part of the sulfate enters the desulfurization slurry circulation tank 81 along with the desulfurization slurry, and therefore, the second drain pipe 85 is provided at the bottom of the desulfurization slurry circulation tank 81, and at the same time, the second drain pump 86 is provided on the second drain pipe 85, but when the drain is required, the drain is discharged by controlling the operation of the second drain pump 86.
Further, as shown in fig. 2, the outlet of the desulfurization slurry circulation tank 81 is further connected to a corresponding second pipeline 82 through a backup pipeline 87, and a third desulfurization slurry delivery pump 88 and a valve 84 are disposed on the backup pipeline 87.
In this embodiment, in order to avoid that the second desulfurization slurry delivery pump 83 and the valve 84 disposed on the second pipe 82 are in a damaged or overhauled state, the desulfurization slurry cannot be normally supplied to the first spraying mechanism 4 and the second spraying mechanism 6, and the redundant design is adopted, the inlet of the standby pipe 87 is connected with the outlet of the desulfurization slurry circulation tank 81, the outlet of the standby pipe 87 is connected with the corresponding second pipe 82, and the standby pipe 87 is provided with the third desulfurization slurry delivery pump 88 and the valve 84, so as to realize backup, thereby ensuring normal supply of desulfurization slurry; the spare pipeline 87 is connected with the outlet of the desulfurization slurry circulating pool 81 through the same pipeline, the second pipeline 82 is connected through a corresponding branch pipeline, and the third desulfurization slurry conveying pump 88 and the valve 84 are arranged on the corresponding branch pipeline, so that independent control of each branch pipeline is realized.
Further, as shown in fig. 2, the desulfurization system further includes:
the liquid level detection mechanism 9 is arranged in the oxidation and precipitation zone 13 and the desulfurization slurry circulating pool 81, and is used for controlling the desulfurization slurry supplementing mechanism 7 to supplement desulfurization slurry into the oxidation and precipitation zone 13 when the liquid level in the oxidation and precipitation zone 13 is lower than a first set value, and generating an alarm when the liquid level in the desulfurization slurry circulating pool 81 is lower than a second set value; the second set value is smaller than the first set value.
Specifically, the oxidation-precipitation zone 13 and the desulfurization slurry circulation tank 81 are in communication with each other, and therefore, generally, the page heights of the oxidation-precipitation zone 13 and the desulfurization slurry circulation tank 81 will remain the same. In the present embodiment, the liquid level detection mechanism 9 is provided to include: a liquid level gauge, a liquid level detection sensor, etc. for detecting the slurry level height in the oxidation and precipitation zone 13 and the desulfurization slurry circulation tank 81; the desulfurization slurry desulfurization device also comprises a controller which is connected with the alarm mechanism and the desulfurization slurry supplementing mechanism 7. When the liquid level of the oxidation and precipitation zone 13 is detected to be lower than a first set value, the controller controls the desulfurization slurry supplementing mechanism 7 to work (comprising controlling the storage tank 71 to inject a preset amount of desulfurizing agent into the pulping tank 72, controlling the water inlet pipeline 73 to inject a preset amount of water into the pulping tank 72, controlling the pulping tank 72 to pulp, and controlling the first desulfurization slurry conveying pump 75 to work after a preset pulping time period elapses), so as to supplement desulfurization slurry into the oxidation and precipitation zone 13; when it is detected that the liquid level in the desulfurization slurry circulation tank 81 is lower than the second set value, a blockage may occur in the pipeline between the oxidation and precipitation zone 13 and the desulfurization slurry circulation tank 81, and an alarm is generated to remind the staff to carry out maintenance. Typically, the second set point is less than the first set point.
Further, as shown in fig. 2 to 4, the smoke guiding mechanism 2 includes:
a support plate 21, wherein the support plate 21 is fixed on the inner wall of the tower body 1, and a plurality of leakage holes 211 are formed on the support plate 21 at intervals;
the guide piece 22 is vertically arranged in the middle of the supporting disc 21, and the middle of the supporting disc 21 and the middle of the guide piece 22 are hollow to form the first flue gas channel 201;
a plurality of hollow flow guide pipes 23 arranged on the lower end surface of the supporting plate 21, wherein each flow guide pipe 23 is communicated with a corresponding leakage hole 211;
and a plurality of supporting ribs 24 are arranged at intervals, one end of each supporting rib 24 is connected with the outer wall of the flow guiding piece 22, and the other end is connected with the inner wall of the tower body 1.
Specifically, in the present embodiment, if the tower body 1 is cylindrical in shape, the support plate 21 and the deflector 22 are also provided in a hollow cylindrical shape; if the tower 1 is in the shape of a long body, both the support plate 21 and the deflector 22 may be provided in the shape of a hollow rectangular parallelepiped. The supporting disk 21 and the flow guiding piece 22 can be in a T-shaped structure and manufactured in an integral mode so as to improve the structural strength; the guide piece 22 is vertically arranged in the middle of the supporting disc 21, can be arranged on the upper end face of the supporting disc 21 to form an inverted T-shaped structure, can also be arranged on the lower end face of the supporting disc 21 to form a T-shaped structure, and the supporting disc 21 and the guide piece 22 are hollow to form a first flue gas channel 201 for flue gas to pass through.
Since the desulfurization slurry is continuously sprayed all the time in the desulfurization process, in order to prevent the slurry from being accumulated on the supporting plate 21 or dropping on the supporting plate 21, the slurry flows downwards from the first flue gas channel 201 to form a fluid sealing interface to affect the normal movement of the flue gas, a plurality of drain holes 211 are arranged on the supporting plate 21 at intervals, hollow guide pipes 23 are arranged on the lower end surface of the supporting plate 21, each guide pipe 23 is communicated with the corresponding drain hole 211 to realize the guide conveying of the desulfurization slurry on the upper end surface of the supporting plate 21, the desulfurization slurry enters the guide pipe 23 through the drain hole 211, falls on the alloy tray 12 from the bottom end of the guide pipe 23, and finally returns to the oxidation precipitation zone 13.
Meanwhile, in order to ensure the strength of the connection structure, a plurality of spaced supporting ribs 24 are provided, one end of each supporting rib 24 is connected with the outer wall of the flow guiding member 22, and the other end is connected with the inner wall of the tower body 1. The support ribs 24 may be disposed horizontally or obliquely.
In another embodiment, in order to ensure guiding and conveying of the desulfurization slurry, the upper end face of the supporting plate 21 is set to be of a concave, U-shaped or inverted trapezoid structure with high edges and low middle, the desulfurization slurry is guaranteed to be converged at the lowest position of the upper end face of the supporting plate 21, the guide pipes 23 and the drain holes 211 are arranged at the lowest position of the upper end face of the supporting plate 21, all the guide pipes 23 form circular rings or square distribution, and the desulfurization slurry is guaranteed to be conveyed downwards through the drain holes 211 and the guide pipes 23 and cannot be converged at the upper end face of the supporting plate 21. In addition, the lower end surface of the support plate 21 is provided as an inclined surface.
Further, as shown in fig. 5, the first mounting frame 31 includes:
the first uniform distribution plate 311, a first side wall 312 is arranged on the upper end surface of the first uniform distribution plate 311, a first accommodating space 313 is formed by the first uniform distribution plate 311 and the first side wall 312, the first packing layer 3 is positioned in the first accommodating space 313, a plurality of uniform distribution holes 302 are formed in the first uniform distribution plate 311 at intervals, and a second flue gas channel 301 is formed by the first side wall 312 and the inner wall of the tower body 1;
specifically, the first uniform distribution plate 311 plays a role in uniformly distributing flue gas, and also plays a role in supporting and accommodating the first filler layer 3. The first uniform distribution plate 311 and the first side wall 312 adopt an integrated structure to form a semi-closed cylinder, have a first accommodating space 313, and are positioned in the axial direction of the middle position of the tower body 1. In order to ensure that the flue gas can enter the first filler layer 3, a plurality of uniform distribution holes 302 are formed in the first uniform distribution plate 311 at intervals for the flue gas to pass through.
Further, a plurality of connecting rods 314 are disposed at intervals, one end of each connecting rod 314 is connected to the first side wall 312, and the other end is connected to the inner wall of the tower body 1.
In this embodiment, as shown in fig. 5, the connecting rod 314 is a cross rod having an X-shaped structure, and one end is connected to the first sidewall 312 and the other end is connected to the inner wall of the tower 1, so as to improve the strength of the connecting structure. The connecting rods 314 may be arranged in three, in a triangular configuration or in four, in a square configuration.
Further, the end of each connecting rod 314 is connected with the inner wall of the tower body 1, a horizontal installation surface is formed between the connecting rods 314, and the first uniform distribution plates 311 are arranged on the connecting rods 314 and are positioned on the installation surface.
In another embodiment, as shown in fig. 6, the connecting rods 314 are a plurality of connecting rods 314 horizontally arranged on the inner wall of the tower body 1 at intervals, a horizontal mounting surface is formed between the plurality of connecting rods 314, and the first uniform distribution plate 311 is arranged on the connecting rods 314. If the tower body 1 is square, the connecting rods 314 are a plurality of connecting rods 314 with the same length, and if the tower body 1 is cylindrical, the connecting rods 314 are a plurality of connecting rods 314 with different lengths.
Further, as shown in fig. 7, the second mounting frame 51 includes:
the second equipartition board 511, the second equipartition board 511 is connected with the inner wall of tower body 1, second equipartition board 511 middle part is provided with the passageway, and the up end is provided with second lateral wall 512, second equipartition board 511 second lateral wall 512 with constitute second accommodation space 513 between the inner wall of tower body 1, second packing layer 5 is located in the second accommodation space 513, the interval is provided with a plurality of equipartition holes 302 on the second equipartition board 511, second lateral wall 512 with the passageway of second equipartition board 511 middle part position forms third flue gas passageway 501.
Specifically, in the present embodiment, if the tower body 1 is square, the second uniform distribution plate 511 has a square structure, and if the tower body 1 is cylindrical, the second uniform distribution plate 511 has a circular annular sheet structure.
The second equipartition board 511 is connected with the inner wall contact of tower 1, and its middle part is provided with the passageway, is provided with second lateral wall 512 on the second equipartition board 511 of passageway edge, and first equipartition board 311 both plays the effect of equipartition flue gas, also plays the effect of supporting and holding second packing layer 5 simultaneously. The second uniformly distributed plate 511, the second side wall 512 and the inner wall of the tower body 1 form a second accommodating space 513, and the second packing layer 5 is located in the second accommodating space 513. In order to ensure that the flue gas can enter the second filler layer 5, a plurality of uniform distribution holes 302 are arranged on the second uniform distribution plate 511 at intervals for the flue gas to pass through. The second side wall 512 and the second uniform distribution plate 511 form an inverted T-shaped structure, and the second side wall 512 and the channel at the middle of the second uniform distribution plate 511 form a third flue gas channel 501.
The second accommodating space 513 is filled with the spherical filler, so that the spherical filler can be partially attached to the tower wall of the tower body 1, the problem of uneven absorption caused by smoke sliding is solved, the filler is configured, the weight of the tower is lighter, the structural load is low, and the service life of the desulfurization system is prolonged.
More specifically, in one embodiment, the width of the first flue gas channel 201 is smaller than the width of the first filler layer 3, and the width of the third flue gas channel 501 is smaller than or equal to the width of the first filler layer 3, so as to reduce the wall flow condition and improve the desulfurization effect.
Further, as shown in fig. 2, 8-9, the first spraying mechanism 4 includes:
the first spraying sub-mechanism 41 is arranged in the tower body 1, is opposite to the second flue gas channel 301, and is used for spraying desulfurization slurry to the second flue gas channel 301 to react with sulfur dioxide in flue gas;
the second spraying sub-mechanism 42 is disposed in the tower body 1, opposite to the first packing layer 3, and above the first spraying sub-mechanism 41, and is configured to spray desulfurization slurry to the first packing layer 3 to react with sulfur dioxide in the flue gas.
Specifically, the first spraying mechanism 4 is divided into a first spraying sub-mechanism 41 and a second spraying sub-mechanism 42, so that the first spraying sub-mechanism 41 sprays only the flue gas conveyed upward through the second flue gas channel 301; the second spraying sub-mechanism 42 sprays only the flue gas which is conveyed upwards through the first packing layer 3, so that the mutual influence in the spraying process is avoided, and the desulfurization effect in the spraying process is improved.
In this embodiment, the first spraying sub-mechanism 41 and the second spraying sub-mechanism 42 have different shapes and structures, and when the tower body 1 is a hollow cylinder, the silicon carbide spray heads 411 in the first spraying sub-mechanism 41 form annular structure distribution, and the silicon carbide spray heads 411 in the second spraying sub-mechanism 42 form circular structure distribution.
Through the technical means, the desulfurization system can effectively treat free moisture, so that the free moisture in flue gas at the outlet of the demister is not more than 45mg/Nm < 3 >, the desulfurization efficiency is high, and the desulfurization efficiency can be ensured to reach more than 95%; the tower body reduces the use of the profile special-shaped structure, can realize the same technical effect as venturi, reduces the manufacturing cost and can be widely applied; the tower body is uniform in structure, so that the heat insulation configuration of the desulfurizing tower is facilitated, the flue gas and the sprayed desulfurizing slurry perform convection heat exchange, and the working temperature is effectively ensured to be higher than the dew point temperature; the three-stage spraying mode has small influence on the gas phase, improves the wall flow condition, and increases the service efficiency and service life of the demister.
The foregoing details of the optional implementation of the embodiment of the present invention have been described in detail with reference to the accompanying drawings, but the embodiment of the present invention is not limited to the specific details of the foregoing implementation, and various simple modifications may be made to the technical solution of the embodiment of the present invention within the scope of the technical concept of the embodiment of the present invention, and these simple modifications all fall within the protection scope of the embodiment of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, various possible combinations of embodiments of the present application are not described in detail.
Those skilled in the art will appreciate that all or part of the steps in implementing the methods of the embodiments described above may be implemented by a program stored in a storage medium, including instructions for causing a single-chip microcomputer, chip or processor (processor) to perform all or part of the steps of the methods of the embodiments described herein. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In addition, any combination of various embodiments of the present application may be performed, so long as the concept of the embodiments of the present application is not violated, and the disclosure of the embodiments of the present application should also be considered.
Claims (8)
1. A desulfurization system, characterized in that the desulfurization system comprises:
the desulfurization device comprises a tower body (1), wherein a desulfurization component is arranged in the tower body (1), flue gas enters the tower body (1) from a flue gas inlet (101) at the bottom of the tower body (1), and is discharged from a flue gas outlet (102) at the top of the tower body (1) after being desulfurized by the desulfurization component;
the desulfurization assembly includes:
the flue gas guiding mechanism (2), the first packing layer (3), the first spraying mechanism (4), the second packing layer (5) and the second spraying mechanism (6) are sequentially arranged along the flue gas flowing direction;
the flue gas guiding mechanism (2) is arranged on the inner wall of the tower body (1), a first flue gas channel (201) is formed in the middle of the tower body (1), and the flue gas guiding mechanism (2) comprises:
the support plate (21), the support plate (21) is fixed on the inner wall of the tower body (1), and a plurality of leak holes (211) are formed in the support plate (21) at intervals;
the guide piece (22) is vertically arranged in the middle of the supporting disc (21), and the middle of the supporting disc (21) and the middle of the guide piece (22) are hollow to form the first flue gas channel (201);
a plurality of hollow flow guide pipes (23) arranged on the lower end surface of the supporting disc (21), wherein each flow guide pipe (23) is communicated with a corresponding drain hole (211);
A plurality of supporting ribs (24) which are arranged at intervals, wherein one end of each supporting rib (24) is connected with the outer wall of the flow guiding piece (22), and the other end is connected with the inner wall of the tower body (1);
the first packing layer (3) is arranged in the tower body (1) through a first mounting frame (31) and is positioned above the first flue gas channel (201), the first packing layer (3) is not contacted with the inner wall of the tower body (1), and a second flue gas channel (301) is formed between the first mounting frame (31) and the inner wall of the tower body (1);
the first spraying mechanism (4) is arranged in the tower body (1), is opposite to the second flue gas channel (301) and the first packing layer (3), and is used for spraying desulfurization slurry to the second flue gas channel (301) and the first packing layer (3) to react with sulfur dioxide in flue gas;
the second packing layer (5) is arranged on the tower body (1) through a second mounting frame (51) and is positioned above the second flue gas channel (301), the second packing layer (5) is in contact with the inner wall of the tower body (1), and the second mounting frame (51) forms a third flue gas channel (501) at the middle position of the tower body (1);
The second spraying mechanism (6) is arranged in the tower body (1), is opposite to the second packing layer (5) and the third flue gas channel (501), and is used for spraying desulfurization slurry to the second packing layer (5) and the third flue gas channel (501) to react with sulfur dioxide in flue gas;
the first spraying mechanism (4) comprises:
the first spraying sub-mechanism (41) is arranged in the tower body (1) and is opposite to the second flue gas channel (301) and is used for spraying desulfurization slurry to the second flue gas channel (301) to react with sulfur dioxide in flue gas;
the second spraying sub-mechanism (42) is arranged in the tower body (1), is opposite to the first packing layer (3), is positioned above the first spraying sub-mechanism (41), and is used for spraying desulfurization slurry to the first packing layer (3) to react with sulfur dioxide in the flue gas.
2. The desulfurization system according to claim 1, characterized in that a demister (11) is arranged above the second spraying mechanism (6) in the tower body (1), the demister (11) being used for removing liquid droplets entrained in gas;
alloy trays (12) are arranged below the smoke guide mechanism (2) in the tower body (1), and a plurality of smoke through holes (121) are formed in the alloy trays (12) at intervals.
3. The desulfurization system according to claim 1, characterized in that an oxidation and precipitation zone (13) is arranged at the bottom end of the tower body (1), the oxidation and precipitation zone (13) is used for collecting desulfurization slurry sprayed by the first spraying mechanism (4) and the second spraying mechanism (6), and the flue gas inlet (101) is positioned above the oxidation and precipitation zone (13);
a gas supply pipeline (14) and a stirrer (15) are arranged in the tower body (1), the gas supply pipeline (14) and the stirrer (15) are both positioned in the oxidation precipitation zone (13), and the gas supply pipeline (14) is used for supplying oxidizing gas into the tower body (1); the stirrer (15) is used for stirring the desulfurization slurry;
the bottom of the oxidation and precipitation zone (13) is provided with a first sewage drain pipeline (16), and the first sewage drain pipeline (16) is provided with a first sewage drain pump (17).
4. The desulfurization system of claim 3, further comprising:
a desulfurization slurry replenishing mechanism (7) for replenishing desulfurization slurry to the oxidation and precipitation zone (13);
the desulfurization slurry replenishing mechanism (7) comprises:
a storage tank (71) for storing a desulfurizing agent;
A pulping tank (72) connected with the storage tank (71) and a water inlet pipeline (73) for mixing a desulfurizing agent and water to prepare a desulfurizing slurry, wherein the pulping tank (72) is communicated with the oxidation precipitation zone (13) through a first pipeline (74) for supplementing the desulfurizing slurry to the oxidation precipitation zone (13);
a first desulfurization slurry delivery pump (75) is arranged on the first pipeline (74).
5. The desulfurization system of claim 4, further comprising:
a desulfurization slurry circulation mechanism (8) for pumping desulfurization slurry to the first spray mechanism (4) and the second spray mechanism (6);
the desulfurization slurry circulation mechanism (8) comprises:
the inlet of the desulfurization slurry circulating pool (81) is communicated with the oxidation precipitation zone (13), and the outlet of the desulfurization slurry circulating pool (81) is respectively communicated with the first spraying mechanism (4) and the second spraying mechanism (6) through corresponding second pipelines (82);
each second pipeline (82) is provided with a second desulfurization slurry conveying pump (83) and a valve (84);
a second sewage drain pipeline (85) is arranged at the bottom of the desulfurization slurry circulating pool (81), and a second sewage drain pump (86) is arranged on the second sewage drain pipeline (85);
The outlet of the desulfurization slurry circulating pool (81) is also connected with a corresponding second pipeline (82) through a standby pipeline (87), and a third desulfurization slurry conveying pump (88) and a valve (84) are arranged on the standby pipeline (87).
6. The desulfurization system of claim 5, further comprising:
the liquid level detection mechanism (9) is arranged in the oxidation precipitation zone (13) and the desulfurization slurry circulating pool (81) and is used for controlling the desulfurization slurry supplementing mechanism (7) to supplement desulfurization slurry into the oxidation precipitation zone (13) when the liquid level in the oxidation precipitation zone (13) is lower than a first set value and generating an alarm when the liquid level in the desulfurization slurry circulating pool (81) is lower than a second set value; the second set value is smaller than the first set value.
7. The desulfurization system according to claim 1, characterized in that said first mounting frame (31) comprises:
the first uniform distribution plate (311), the up end of first uniform distribution plate (311) is provided with first lateral wall (312), first accommodation space (313) is formed between first uniform distribution plate (311) and first lateral wall (312), first packing layer (3) are located in first accommodation space (313), a plurality of uniform distribution holes (302) are arranged on first uniform distribution plate (311) at intervals, and second flue gas channel (301) is formed between first lateral wall (312) and inner wall of tower body (1);
A plurality of connecting rods (314) which are arranged at intervals, wherein one end of each connecting rod (314) is connected with the first side wall (312), and the other end of each connecting rod (314) is connected with the inner wall of the tower body (1); or a plurality of connecting rods (314) which are arranged at intervals, wherein the end part of each connecting rod (314) is connected with the inner wall of the tower body (1), a horizontal installation surface is formed among the plurality of connecting rods (314), and the first uniform distribution plate (311) is arranged on the connecting rods (314) and is positioned on the installation surface.
8. The desulfurization system according to claim 1, characterized in that said second mounting frame (51) comprises:
the second equipartition board (511), the inner wall connection of second equipartition board (511) and tower body (1), the middle part position of second equipartition board (511) is provided with the passageway, and the up end is provided with second lateral wall (512), second equipartition board (511) second lateral wall (512) with constitute second accommodation space (513) between the inner wall of tower body (1), second packing layer (5) are located in second accommodation space (513), the interval is provided with a plurality of equipartition holes (302) on second equipartition board (511), second lateral wall (512) with form third flue gas passageway (501) between the passageway of second equipartition board (511) middle part position.
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| CN202311087998.9A CN116808803B (en) | 2023-08-28 | 2023-08-28 | Desulfurization system |
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| CN202311087998.9A CN116808803B (en) | 2023-08-28 | 2023-08-28 | Desulfurization system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| US6923852B2 (en) * | 2002-10-24 | 2005-08-02 | The Babcock & Wilcox Company | Flue gas desulfurization system with a stepped tray |
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| CN116808803A (en) | 2023-09-29 |
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