CN112090266A - Wet desulphurization device - Google Patents
Wet desulphurization device Download PDFInfo
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- CN112090266A CN112090266A CN202010952987.2A CN202010952987A CN112090266A CN 112090266 A CN112090266 A CN 112090266A CN 202010952987 A CN202010952987 A CN 202010952987A CN 112090266 A CN112090266 A CN 112090266A
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- flue gas
- desulfurization
- desulfurization tower
- tower
- rectification module
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 171
- 239000003546 flue gas Substances 0.000 claims abstract description 170
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 145
- 230000023556 desulfurization Effects 0.000 claims abstract description 145
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 26
- 238000005507 spraying Methods 0.000 claims abstract description 23
- 230000001737 promoting effect Effects 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 abstract description 25
- 239000000428 dust Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to the technical field of environment-friendly treatment equipment, and provides a wet desulphurization device for solving the technical problems of overlarge diameter of a desulphurization tower and high operation cost in the prior art, wherein the device comprises: the device comprises a desulfurizing tower, and a flue gas inlet section, a desulfurizing effect-improving component, a spraying layer and a demisting layer which are sequentially arranged in the desulfurizing tower from bottom to top; a flue gas rectification module is arranged in the desulfurization effect-improving component; the flue gas rectification module distributes the flue gas from the flue gas inlet section into a flue gas flow rate close to the center of the flue gas discharge hole and a flue gas flow rate far away from the periphery of the center of the flue gas discharge hole; the liquid drops sprayed out of the spraying layer form a distribution pattern that the liquid drops in the center of the spraying layer are high and the liquid drops around the spraying layer are low. The flue gas rectification module and the corresponding distribution pattern that sprays the layer in this application can improve the utilization ratio and the desulfurization efficiency that spray the thick liquid to reduce the volume of desulfurizing tower, reduce investment cost and working costs.
Description
Technical Field
The invention relates to the technical field of environment-friendly treatment equipment, in particular to a wet desulphurization device.
Background
With the improvement of atmospheric environmental protection requirements in non-electric power industries, devices such as medium and small boilers, industrial kilns and ships and the like begin to be provided with wet desulphurization systems for treating SO2 and dust in discharged flue gas. Different from the desulfurization tower for flue gas desulfurization of a thermal power plant, the diameter of the desulfurization tower is greatly reduced along with the reduction of the amount of flue gas, the negative influence of the inner wall surface effect of the desulfurization tower on the desulfurization efficiency is very large, and the flue gas desulfurization efficiency is difficult to reach the standard when design parameters similar to those of the desulfurization tower of the thermal power plant are adopted; therefore, when designing the desulfurization tower, the diameter of the desulfurization tower is often selected to be large, resulting in high investment and operation costs.
In order to improve the desulfurization efficiency of the medium-diameter desulfurization tower and the small-diameter desulfurization tower and ensure that the flue gas is discharged up to standard, the wet desulfurization tower needs to be upgraded. The current non-electric power industry flue gas desulfurization technologies mainly comprise wet desulfurization, semi-dry desulfurization and dry desulfurization, the wet desulfurization is divided into technologies of a calcium method, a sodium method, a magnesium method, a seawater method and the like according to different desulfurizers, and the main desulfurizing towers are in the forms of spray tower washing, packed bed washing, venturi washing and the like. Wherein the spray tower washing has advantages such as resistance is little, the energy consumption is low, simple structure, nevertheless also has the desulfurizing tower diameter too big, and the working costs is high, needs to carry out the upgrading transformation of improving effect urgently.
Disclosure of Invention
In order to solve the technical problems of overlarge diameter and high operating cost of a desulfurization tower in the prior art, the invention provides the wet desulfurization device, the formed smoke distribution pattern is consistent with the distribution of slurry sprayed by a spraying layer in the wet desulfurization device in the tower, so that the full contact between gas and liquid is realized, the utilization rate and the desulfurization efficiency of the sprayed slurry are improved, the size of the desulfurization tower is reduced, and the investment cost and the operating cost are reduced.
The embodiment of the invention provides a wet desulphurization device, which is characterized by comprising:
the device comprises a desulfurizing tower, and a flue gas inlet section, a desulfurizing effect-improving component, a spraying layer and a demisting layer which are sequentially arranged in the desulfurizing tower from bottom to top;
a flue gas rectification module is arranged in the desulfurization effect-improving component and comprises a hollow flue gas discharge hole and guide vanes extending from the inner side arm of the desulfurization tower to the discharge hole;
the flue gas rectification module is used for controlling the flue gas from the flue gas inlet section to be distributed into a flue gas flow rate close to the center of the flue gas discharge hole and a flue gas flow rate far away from the periphery of the center of the flue gas discharge hole; the liquid drops sprayed out of the spraying layer form a distribution pattern that the liquid drops in the center of the spraying layer are high and the liquid drops around the spraying layer are low.
In a preferred implementation manner of the embodiment of the present invention, a flue gas inlet is formed at the bottom of the flue gas inlet section of the desulfurization tower, and a flue gas outlet is formed at the top of the desulfurization tower.
In a further preferred implementation manner of the embodiment of the present invention, the flue gas inlet is located at the bottom of the desulfurization tower, an air-lift cap is disposed above the inlet flue, and the guide vanes in the flue gas rectification module are arranged in an axisymmetric manner, so that the flue gas enters the desulfurization tower in an axisymmetric manner.
In a preferred implementation manner of the embodiment of the present invention, a flue gas inlet is formed in a wall surface of a flue gas inlet section of the desulfurization tower, and a flue gas outlet is formed in a top of the desulfurization tower.
In a further preferred embodiment of the present invention, the flue gas inlet is located on a side wall of the desulfurization tower, the guide vanes in the flue gas rectification module are eccentrically arranged, and the eccentric flue gas discharge hole is close to the side wall of the desulfurization tower where the flue gas inlet is located.
In a preferred embodiment of the present invention, the guide vane includes a short side, a long side, and an arc connecting the short side and the long side.
In a further preferred embodiment of the present invention, the short side is parallel to a centerline of the desulfurization tower; the width of the long side in the direction perpendicular to the central line of the desulfurization tower is different along with the distance from the central line of the desulfurization tower, and the width is larger as the distance is farther; the included angle between the long edge and the cross section of the desulfurizing tower is 20-65 degrees.
In a preferred implementation manner of the embodiment of the present invention, one end of a guide vane in the flue gas rectification module is connected to an inner wall of the desulfurization tower.
In a preferred implementation manner of the embodiment of the present invention, the desulfurization effect-enhancing assembly further includes an external cylinder, and a side wall of the external cylinder abuts against an inner wall of the desulfurization tower; and one end of a guide vane in the smoke rectification module is connected with the inner wall of the external cylinder.
In a preferred embodiment of the present invention, the distance between adjacent guide vanes is different along the radial direction of the desulfurization tower, and the distance from the center line of the desulfurization tower is smaller.
By adopting the technical scheme provided by the invention, the flue gas flow field distribution is interfered by the flue gas rectification module, so that the flue gas flow field distribution and the spray liquid drop distribution tend to be consistent, the contact strength and the uniformity of the flue gas and the spray liquid drops are improved, and the desulfurization efficiency is further improved; the negative influence of the wall effect on the desulfurization efficiency is reduced. The flue gas rectification module is used for controlling the flue gas from the flue gas inlet section to be distributed into a flue gas flow rate close to the center of the flue gas discharge hole and a flue gas flow rate far away from the periphery of the center of the flue gas discharge hole; the liquid drops sprayed out of the spraying layer are distributed in such a way that the liquid drops in the center of the spraying layer are high and the liquid drops around the spraying layer are low; therefore, the concentration distribution patterns of the flue gas and the spray liquid drops are consistent, so that the gas and the liquid are uniformly mixed, and the desulfurization and dust removal efficiency is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure and/or process particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
Fig. 1 is a schematic structural diagram of a wet desulfurization apparatus according to an embodiment of the present invention.
Fig. 2 is a top view of a desulfurization effect promoting assembly in a wet desulfurization device according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a desulfurization effect-promoting component in a wet desulfurization device from another view according to an embodiment of the present invention.
Fig. 4 is a partial schematic view of a desulfurization effect-promoting component in a wet desulfurization device according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a wet desulfurization apparatus according to a second embodiment of the present invention.
Fig. 6 is a top view of a desulfurization effect promoting assembly in a wet desulfurization device according to a second embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a desulfurization effect-promoting component in a wet desulfurization device in another view according to a second embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that the detailed description is only for the purpose of making the invention easier and clearer for those skilled in the art, and is not intended to be a limiting explanation of the invention; moreover, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are all within the scope of the present invention.
Additionally, the steps illustrated in the flow charts of the drawings may be performed in a control system such as a set of controller-executable instructions and, although a logical ordering is illustrated in the flow charts, in some cases, the steps illustrated or described may be performed in an order different than that illustrated herein.
The technical scheme of the invention is described in detail by the figures and the specific embodiments as follows:
the application provides a wet flue gas desulfurization device, this wet flue gas desulfurization device includes:
the desulfurization tower 110, 210, and the flue gas inlet section, desulfurization efficiency-improving component 150, 250, spray layer 120, 220, demisting layer 130, 230 that set up in the desulfurization tower from bottom to top in proper order.
A flue gas rectification module is arranged in the desulfurization effect-improving component and comprises hollow flue gas discharge holes 156 and 256 and guide vanes 152 and 252 extending from the inner side arms of the desulfurization tower to the discharge holes 156 and 256;
the flue gas inlet can be arranged at the bottom, such as a bottom flue gas inlet, according to different types of the desulfurizing tower; or on the side wall, such as the side wall flue gas inlet; the top of the desulfurizing tower is provided with a flue gas outlet; the flue gas rectification module guides the flue gas from the flue gas inlet to the central area of the desulfurizing tower, and reduces the flue gas flow velocity of a low-concentration spray liquid drop area near the wall surface; the desulfurization reactant sprayed out of the spraying layer is uniformly contacted with the rectified flue gas, and the flue gas is cooled, desulfurized and dedusted; at least one dust and mist removing device is arranged in the mist removing layer.
The flue gas rectification module is used for controlling the flue gas from the flue gas inlet section to be distributed into a flue gas flow rate close to the center of the flue gas discharge hole and a flue gas flow rate far away from the periphery of the center of the flue gas discharge hole.
Example one
As shown in fig. 1 to 4, the present embodiment provides a type I wet desulfurization apparatus 100, where the wet desulfurization apparatus 100 includes:
the desulfurizing tower 110, and set up flue gas inlet section 150 in the desulfurizing tower from bottom to top in proper order, the effect subassembly 150 is carried in the desulfurization, sprays layer 120, defogging layer 130.
A flue gas rectification module is arranged in the desulfurization efficiency-improving component 150, and the flue gas rectification module comprises a hollow flue gas discharge hole 156 and a guide vane 152 extending from the inner side arm of the desulfurization tower to the discharge hole.
The flue gas rectification module in the desulfurization effect-improving component 150 guides the flue gas from the flue gas inlet to the central area of the desulfurization tower 110, and reduces the flue gas flow velocity of the low-concentration spray liquid drop area near the wall surface; the desulfurization reactant sprayed out of the spray layer 120 is uniformly contacted with the rectified flue gas, and the flue gas is cooled, desulfurized and dedusted; at least one dust and mist eliminator is arranged in the mist eliminating layer 130.
The flue gas rectification module is used for controlling the flue gas from the flue gas inlet section to be distributed into a flue gas flow rate close to the center of the flue gas discharge hole 156 and a flue gas flow rate far away from the periphery of the center of the flue gas discharge hole 156; the liquid drops sprayed out of the spraying layer form a distribution pattern that the liquid drops in the center of the spraying layer are high and the liquid drops around the spraying layer are low.
The flue gas rectification module intervenes the flow field distribution of the flue gas, so that the distribution of the flue gas flow field and the distribution of the spray liquid drops tend to be consistent, the contact strength and the uniformity of the flue gas and the spray liquid drops are improved, and the desulfurization efficiency is further improved; the negative influence of the wall effect on the desulfurization efficiency is reduced. The flue gas rectification module is used for controlling the flue gas from the flue gas inlet section to be distributed into a flue gas flow rate close to the center of the flue gas discharge hole and a flue gas flow rate far away from the periphery of the center of the flue gas discharge hole; therefore, the concentration distribution patterns of the flue gas and the spray liquid drops tend to be consistent, so that the gas and the liquid are uniformly mixed, and the desulfurization and dust removal efficiency is improved.
As shown in fig. 1, in the preferred embodiment of the present invention, the bottom of the flue gas inlet section 140 of the desulfurization tower is provided with a flue gas inlet, and the top of the desulfurization tower is provided with a flue gas outlet 170.
As shown in fig. 2-4, in a further preferred embodiment of this embodiment, the flue gas inlet is located at the bottom of the desulfurization tower, the inlet flue is provided with a gas lifting cap 160 above the inlet flue, and the guide vanes 152 in the flue gas rectification module are arranged in an axisymmetric manner, so that the flue gas enters the desulfurization tower 110 in an axisymmetric manner.
As shown in fig. 4, the guide vane 152 includes a short side 152a, a long side 152b, and a circular arc 152c connecting the short side 152a and the long side 152 b. The guide vane 152 is L-shaped with an arc transition 152c between the long side 152b and the short side 152 a; the short side is vertically upward and parallel to the center line of the desulfurizing tower 110, and the heights are the same along the radial direction of the desulfurizing tower 110; the length of the long side 152b is different along the radial direction of the desulfurization tower 110, and the longer the long side 152b is from the center line of the desulfurization tower 110. Specifically, the short side 152a is parallel to the centerline of the desulfurization tower 110; the width of the long side 152c in the direction perpendicular to the center line of the desulfurization tower 110 differs depending on the distance from the center line of the desulfurization tower 110, and the width increases as the distance increases; the included angle between the long side 152b and the cross section of the desulfurizing tower is 20-65 degrees.
As shown in fig. 2-4, in the preferred embodiment of this embodiment, the desulfurization promoting assembly further includes an outer cylinder 154, and the sidewall of the outer cylinder 154 abuts against the inner wall of the desulfurization tower 110; and one end of the guide vane 152 in the flue gas rectification module is connected with the inner wall of the circumscribed cylinder 154. In the present embodiment, the distance between adjacent guide vanes 152 is different along the radial direction of the desulfurization tower, and the distance from the center line of the desulfurization tower is smaller.
When the desulfurization effect-improving component 150 is used, the number of the guide vanes 152 is set to be 8-30, and the included angle between one side of the long edge of each vane and the cross section of the tower is 20-65 degrees; the ratio of the projection area of the desulfurization promoting component 150 on the cross section of the tower to the cross section of the tower is less than 0.75.
In the actual work process, when handling the flue gas volume great, adopt the desulfurizing tower of great diameter, the fairing projected area ratio of this moment gets less value, and when the flue gas volume was less, the desulfurizing tower diameter diminishes, and fairing projected area ratio gets great value.
As shown in fig. 1, in a preferred embodiment of the present embodiment, the temperature-reducing spray layers 120 are 1 to 3 layers, and when the temperature-reducing spray layers 120 are a plurality of layers, the spray layers 120 are arranged at intervals in the height direction of the desulfurization tower.
Of course, the present embodiment is not limited to this, and for example, one end of the guide vane 152 in the flue gas rectification module is connected to the inner wall of the desulfurization tower 110.
In the working process, at least one group of desulfurization efficiency-improving components 150 are arranged in the wet desulfurization device 100, and the flue gas rectification modules in the desulfurization efficiency-improving components 150 radially set different resistance coefficients for flue gas, so that the flue gas is guided to gather towards the center of the tower, and the flue gas forms a distribution pattern with high central flow velocity and low peripheral flow velocity.
In the working process, the flue gas to be treated enters the reaction tower from the side through the inlet flue of the desulfurizing tower 110; after entering the high-temperature flue gas (120 ℃), the high-temperature flue gas to be treated is firstly rectified in a flue gas flow field through the desulfurization effect-improving assembly 150, so that high-speed airflow is far away from the wall surface and is converged to the center, and then the flue gas enters the spraying layer. For the medium and small diameter desulfurizing tower, the influence of the tower wall surface on the nozzle distribution and the liquid drop distribution is large, and the liquid drops sprayed by the nozzles inevitably form a distribution pattern that the liquid drop concentration in the central area is large and the liquid drops in the periphery are small. The flue gas reversely contacts with the spray liquid drops in the area between the desulfurization effect-improving component 150 and the spray layer 120, so as to realize temperature reduction, speed reduction, desulfurization and dust removal; in this interval, the flue gas distribution pattern and the liquid drop distribution pattern are high in center and low in periphery, so that gas-liquid contact is sufficient, the mixing strength is high, the utilization rate of the spraying solution is improved, and the desulfurization efficiency and the dust removal efficiency of the desulfurization tower 110 are improved. The flue gas then enters a demister 130 to remove fog drops and partial particles carried by the flue gas; and finally, discharging the purified flue gas from a chimney and allowing the purified flue gas to enter the atmosphere.
Example two
As shown in fig. 5 to 7, in the present embodiment, a U-shaped wet desulfurization apparatus 200 is provided, and the wet desulfurization apparatus 200 also includes: the desulfurization tower 210, and set up flue gas inlet section 240 in the desulfurization tower 210 from bottom to top in proper order, the subassembly 250 is carried in the desulfurization, sprays layer 220, defogging layer 230. Wherein, the spraying layer 220 and the demisting layer 230 are the same as those of the first embodiment, but the position of the flue gas inlet section 240 is different from that of the first embodiment, and the structure of the desulfurization promoting component 250 is different from that of the first embodiment.
Specifically, as shown in fig. 5-7, the wall of the flue gas inlet section 240 of the desulfurization tower 210 is provided with a flue gas inlet, and the top of the desulfurization tower 200 is provided with a flue gas outlet 270.
As shown in fig. 5-7, the flue gas inlet 270 is located on the sidewall of the desulfurization tower 200, the guide vanes 252 in the flue gas rectification module are arranged in an eccentric manner, and the eccentric flue gas discharge hole 156 is close to the sidewall of the desulfurization tower 200 where the flue gas inlet is located; i.e., the central axis of the discharge holes 156 of the flue gas straightening module is closer to the sidewall of the desulfurization tower 200 where the flue gas inlet 270 is located, relative to the central axis of the desulfurization tower 210.
The guide vane 252 also includes a short side 2152a, a long side 252b, and a circular arc 252c connecting the short side 252a and the long side 252 b.
The guide vanes 252 may be directly welded to the wall of the desulfurization tower 210, or may be welded to one cylinder 254, and may be installed in the desulfurization tower 210 after being subjected to an anti-corrosion treatment. For an eccentric flue gas rectification module, the angle of the central point of the flue gas rectification module must also meet the design requirements.
In this embodiment, the long side 252b of the guide vane 252 forms a preset included angle with the flow direction of the flue gas; and the ratio of the projection of the guide vane 252 on the cross section of the desulfurization tower 210 to the cross section of the desulfurization tower 210 is controlled within a certain range. Further, the spacing between two adjacent guide vanes 252 is different in the radial direction, with the spacing decreasing the further away from the tower centerline. And the cooling spray layer 220 is 1-3 layers, and when the cooling spray layer 220 is a plurality of layers, the spray layers are arranged at intervals in the height direction of the desulfurization tower.
Although the flue gas rectification modules provided by the embodiment are eccentrically distributed, the eccentricity is closely related to the diameter of the desulfurization tower and the shape of the inlet flue, and specific project specific analysis is required. The flue gas flow field is rectified into a part of pattern with axial symmetry, high center and low periphery by the flue gas rectification module which is eccentrically arranged, so that the concentration distribution pattern of the flue gas and the concentration distribution pattern of the spray liquid drops are consistent, the uniform mixing of gas and liquid is realized, and the desulfurization and dust removal efficiency is improved; realizing the economic operation of the desulphurization device.
It should be noted that the wet desulfurization apparatus 200 provided in this embodiment can be used in combination with the wet desulfurization apparatus 100 provided in the first embodiment (including both apparatuses at the same time) to form a wet desulfurization system; a flue gas inlet 270 corresponding to the first embodiment may be additionally disposed in the wet desulfurization device 200 provided in this embodiment, and the desulfurization effect-promoting component 150 provided in the first embodiment is also used in combination; therefore, the application scene of the wet desulphurization device is wider, and the different embodiments belong to the protection scope of the application.
Finally, it should be understood that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make many changes and simple substitutions to the technical solution of the present invention without departing from the technical solution of the present invention, and the technical solution of the present invention is protected by the following claims.
Claims (10)
1. A wet desulfurization apparatus, comprising:
the device comprises a desulfurizing tower, and a flue gas inlet section, a desulfurizing effect-improving component, a spraying layer and a demisting layer which are sequentially arranged in the desulfurizing tower from bottom to top;
a flue gas rectification module is arranged in the desulfurization effect-improving component and comprises a hollow flue gas discharge hole and guide vanes extending from the inner side arm of the desulfurization tower to the discharge hole;
the flue gas rectification module is used for controlling the flue gas from the flue gas inlet section to be distributed into a flue gas flow rate close to the center of the flue gas discharge hole and a flue gas flow rate far away from the periphery of the center of the flue gas discharge hole; the liquid drops sprayed out of the spraying layer form a distribution pattern that the liquid drops in the center of the spraying layer are high and the liquid drops around the spraying layer are low.
2. The device of claim 1, wherein the bottom of the flue gas inlet section of the desulfurization tower is provided with a flue gas inlet, and the top of the desulfurization tower is provided with a flue gas outlet.
3. The device of claim 2, wherein the flue gas inlet is positioned at the bottom of the desulfurization tower, an air lifting cap is arranged above the inlet flue, and the guide vanes in the flue gas rectification module are arranged in an axisymmetric manner, so that the flue gas enters the desulfurization tower in an axisymmetric manner.
4. The device of claim 1, wherein the wall of the flue gas inlet section of the desulfurization tower is provided with a flue gas inlet, and the top of the desulfurization tower is provided with a flue gas outlet.
5. The device of claim 4, wherein the flue gas inlet is located on the side wall of the desulfurization tower, the guide vanes in the flue gas rectification module are arranged in an eccentric manner, and the eccentric flue gas discharge hole is close to the side wall of the desulfurization tower where the flue gas inlet is located.
6. The device of any one of claims 1-5, wherein the guide vanes comprise a short side, a long side, and a circular arc connecting the short side and the long side.
7. The apparatus of claim 6, wherein the short side is parallel to a centerline of the desulfurization tower; the width of the long side in the direction perpendicular to the central line of the desulfurization tower is different along with the distance from the central line of the desulfurization tower, and the width is larger as the distance is farther; the included angle between the long edge and the cross section of the desulfurizing tower is 20-65 degrees.
8. The device according to any one of claims 1 to 5, wherein one end of the guide vane in the flue gas rectification module is connected with the inner wall of the desulfurization tower.
9. The apparatus of any one of claims 1-5, wherein the desulfurization promoting assembly further comprises an outer cylinder, a sidewall of the outer cylinder abutting an inner wall of the desulfurization tower; and one end of a guide vane in the smoke rectification module is connected with the inner wall of the external cylinder.
10. The apparatus of any one of claims 1 to 5, wherein the spacing between adjacent guide vanes is different in a radial direction of the desulfurization tower and is smaller as the distance from the center line of the desulfurization tower increases.
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| CN202010952987.2A CN112090266A (en) | 2020-09-11 | 2020-09-11 | Wet desulphurization device |
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