CN109107342A - Multi-stage spray venturi desulfation dust-extraction device and its method - Google Patents
Multi-stage spray venturi desulfation dust-extraction device and its method Download PDFInfo
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- CN109107342A CN109107342A CN201710487338.8A CN201710487338A CN109107342A CN 109107342 A CN109107342 A CN 109107342A CN 201710487338 A CN201710487338 A CN 201710487338A CN 109107342 A CN109107342 A CN 109107342A
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- desulfurizing agent
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- venturi
- desulfurization
- pipe
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- 238000000605 extraction Methods 0.000 title claims abstract description 22
- 239000007921 spray Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 72
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 65
- 239000003546 flue gas Substances 0.000 claims abstract description 42
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 39
- 230000023556 desulfurization Effects 0.000 claims abstract description 38
- 239000003517 fume Substances 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 239000000428 dust Substances 0.000 claims abstract description 30
- 238000005507 spraying Methods 0.000 claims abstract description 29
- 239000007789 gas Substances 0.000 claims abstract description 19
- 238000004140 cleaning Methods 0.000 claims abstract description 15
- 238000004062 sedimentation Methods 0.000 claims abstract description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 33
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 30
- 229910052742 iron Inorganic materials 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 14
- 125000004122 cyclic group Chemical group 0.000 claims description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 10
- 239000005864 Sulphur Substances 0.000 claims description 8
- 239000002608 ionic liquid Substances 0.000 claims description 7
- 150000002500 ions Chemical class 0.000 claims description 7
- 239000008258 liquid foam Substances 0.000 claims description 7
- 230000008602 contraction Effects 0.000 claims description 6
- 230000000737 periodic effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000011593 sulfur Substances 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 125000005909 ethyl alcohol group Chemical group 0.000 claims description 2
- -1 volume ratio 2:3:6 Substances 0.000 claims description 2
- 238000001727 in vivo Methods 0.000 claims 1
- 239000000843 powder Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 14
- 239000000243 solution Substances 0.000 description 11
- 238000012546 transfer Methods 0.000 description 8
- 238000002156 mixing Methods 0.000 description 5
- 238000005192 partition Methods 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 235000011121 sodium hydroxide Nutrition 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- KAIPKTYOBMEXRR-UHFFFAOYSA-N 1-butyl-3-methyl-2h-imidazole Chemical compound CCCCN1CN(C)C=C1 KAIPKTYOBMEXRR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 150000002460 imidazoles Chemical class 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
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
- B01D53/14—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 by absorption
- B01D53/1406—Multiple stage absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- 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
- B01D53/14—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 by absorption
- B01D53/1456—Removing acid components
-
- 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
- B01D53/14—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 by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/30—Ionic liquids and zwitter-ions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to a kind of desulphurization and dust removal integrated devices, especially multi-stage spray venturi desulfation dust-extraction device and its method.Including fume pipe, desulfurizing agent delivery pipe, the top desulfurized dust collection column and sedimentation basin equipped with cleaning flue gases outlet being connect with Venturi tube both ends, the desulfurizing agent delivery pipe is connect by desulfurization and dedusting delivery pump with desulfurizing agent reservoir, the fume pipe is tangentially connected in desulfurization and dedusting tower bottom, several spraying baffles are equipped in the fume pipe connecting with the venturi tube inlet section, the spraying baffle bottom end is equipped with atomizer, and spraying baffle arrival end is connect with desulfurizing agent delivery pipe；Desulfurization and dedusting tower bottom is equipped with liquid line, and outlet tube is connected to above sedimentation basin；Any spraying baffle spraying baffle interlaced arrangement adjacent thereto is in fume pipe.The present invention compared with prior art, has the advantages that structure is simple, occupied area is small, exhaust gases passes are short, air-flow stroke is long, easy to maintenance, with low investment, desulfurization dust-removing efficiency is high.
Description
Technical field
The present invention relates to a kind of desulphurization and dust removal integrated device, especially multi-stage spray venturi desulfation dust-extraction device and its
Method.
Background technique
In existing various wet flue gas desulfuration dedusting devices, venturi spray desulfation dust-extraction device structure letter in contrast
List, small investment, treatment effect are higher.Existing venturi desulfurization and dedusting is usually the flue gas before flue gas enters king-tower
Pipe is equipped with Venturi throat, is disposed with one or more atomizers on the same section before Venturi throat, reaches
Washing water and smoke contacts exchange mass transfer, the purpose of desulfurization and dedusting.But the washing water of this disposable short time connects with flue gas
The disadvantages of touching, exchange are easy to appear mass transfer and are not enough, and the reaction time is too short, so being difficult to meet environmental protection higher and higher at present
The requirement of discharge, while needing to design high flue gas flow rate, therefore flue gas resistance is high, the pressure loss is big, and power consumption is high.
Summary of the invention
The object of the present invention is to provide a kind of multi-stage spray venturi desulfation dust-extraction device, simple, with low investment with structure,
Power consumption is low, the good device of desulfurization and dedusting effect.
To solve the above problems, the present invention provides multi-stage spray venturi desulfation dust-extraction device, specific technical solution is as follows:
Multi-stage spray venturi desulfation dust-extraction device, fume pipe, desulfurizing agent including connecting with Venturi tube both ends convey
Pipe, top are equipped with the desulfurized dust collection column and sedimentation basin of cleaning flue gases outlet, and the desulfurizing agent delivery pipe is conveyed by desulfurization and dedusting
Pump is connect with desulfurizing agent reservoir, and the fume pipe is tangentially connected in desulfurization and dedusting tower bottom, with the venturi tube inlet Duan Lian
It is equipped with several spraying baffles in the fume pipe that connects, the spraying baffle bottom end is equipped with atomizer, spraying baffle arrival end and de-
The connection of sulphur agent delivery pipe；Desulfurization and dedusting tower bottom is equipped with liquid line, and outlet tube is connected to above sedimentation basin.
Preferably, any spraying baffle spraying baffle interlaced arrangement adjacent thereto is in fume pipe；It is described any
Spraying baffle is horizontal by 30~45° angle.
Preferably, the fume pipe middle section of the venturi tube inlet section connection is additionally provided with cyclic annular ejection section, the cyclic annular spray
It penetrates portion's bottom annular and is evenly distributed with several atomizers.
Preferably, the cyclic annular ejection section exit diameter is less than inlet diameter, exit diameter: flue gas bore is
0.6~0.8.
Preferably, desulfurizing agent reservoir is divided into the first reservoir and the second reservoir, and it is defeated that desulfurizing agent delivery pipe is divided into the first desulfurizing agent
Pipe and the second desulfurizing agent delivery pipe are sent, the spraying baffle arrival end is connect with the first desulfurizing agent delivery pipe, and cyclic annular ejection section enters
Mouth end is connect with the second desulfurization conveying dedusting liquid delivery pipe.
Preferably, ultrasonic unit is additionally provided in the desulfurized dust collection column.
Preferably, demister and demister washer jet, institute are additionally provided in the desulfurized dust collection column, above ultrasonic unit
Demister is stated set on desulfurization and dedusting top of tower, demister washer jet is set to below demister.
The present invention also provides a kind of desulfurization and dust-removal method, this method uses above-mentioned multi-stage spray venturi desulfurization and dedusting
Device includes the following steps:
A, flue gas enters in desulfation dust-extraction device from fume pipe, and the first desulfurizing agent delivery pipe takes off first in the first reservoir
Sulphur agent is transported in fume pipe and mixes with flue gas；
B, the second desulfurizing agent in the second reservoir is transported to fume pipe by cyclic annular ejection section by the second desulfurizing agent delivery pipe
Middle section, the second desulfurizing agent are mixed with flue gas, first and second desulfurizing agent absorbs the sulfur and dust in absorption flue gas；
C, gas-liquid mixture enters in Venturi tube and is sufficiently mixed, and flue gas flow rate is 30- in the contraction flow region of Venturi tube (4)
70m/s, mixed high-speed gas-liquid mixture are centrifugated after entering cylindrical desulfurized dust collection column along a tangential direction, adsorption liquid
Body flow to tower bottom along desulfurization and dedusting tower body inner wall, is finally discharged into sedimentation basin from outlet tube, gas and a part of unsegregated micro-
Small liquid foam further separates after ultrasonic unit acts on, into demister, and clean gas is exported from cleaning flue gases and is discharged；
D, periodic cleaning demister.
As further improved, first desulfurizing agent is the sodium hydroxide solution that mass concentration is 5~15%, described
Second desulfurizing agent is iron-based ion doctor solution, and the iron-based ion doctor solution is the desulfurization of iron-based ionic liquid, water, ethyl alcohol composition
Liquid, volume ratio 2:3:6, gas liquid ratio are 3~5:1.The iron-based ionic liquid the preparation method comprises the following steps: by chlorination 1- butyl -3- first
Base imidazoles and FeCl3·6H2O by 1:2 molar ratio be mixed reaction for 24 hours, institute's score layer solution go upper layer obtain it is iron-based from
Sub- liquid.
As further improved, the acting frequency of ultrasonic unit (13) is 45~250KHz, the sound intensity is 0.2~
0.5KW/m2。
According to wet method sulphur removing and dust removing principle it is found that desulfurization and dedusting effect mixed with the mass transfer of desulfurization and dedusting liquid and flue gas whether
Sufficiently, the length of mixed duration is related, and the mass transfer mixing of desulfurization and dedusting liquid and flue gas is more abundant, and mixed duration is got over
Long, desulfurization and dedusting effect is better.Meanwhile needing to be effectively separated gas-liquid mixture after desulfurization and dedusting, reduce gas-liquid mixed
Object is discharged into environment with flue gas.
The principle of the present invention is, on fume pipe, front and back is disposed with multistage atomizing nozzle, desulfurizing agent and relatively high flow velocity
Flue gas carry out repeat impact and meet mixing, there is the longer mixing desulfurization and dedusting reaction time, it is then common into venturi
Pipe, accelerates suddenly in the contraction flow region flue gas flow rate of Venturi tube, big with relative mass, and slower desulfurizing agent is accelerated to form fierceness
Impact, further strengthens the mass transfer immixture of desulfurizing agent and flue gas, to realize the abundant mass transfer of desulfurization and dedusting liquid and flue gas
Mix purpose.Then the gas-liquid mixture tangential direction of high speed enters cylindrical desulfurization and dedusting tower body, and gas-liquid mixture is being centrifuged
It is separated under power effect, liquid flow to tower bottom along desulfurization and dedusting tower body inner wall under the effect of gravity, is finally discharged into from outlet tube
Sedimentation basin.The ultrasonic wave effect that gas and a part of unsegregated minute liquid foam are generated by ultrasonic unit, generates vibration, coagulates
Poly-, electromagnetic adsorption etc., makes minute liquid foam and dust granules become larger, further separates into demister, and clean gas is from cleaning
Exhanst gas outlet discharge.Demister carries out periodic cleaning by demister washer jet.
Compared with prior art, device is with structure is simple, occupied area is small, exhaust gases passes are short, air-flow row by the present invention
The advantages that journey is long, easy to maintenance, with low investment, and desulfurization dust-removing efficiency is high；Desulfurization and dust-removal method provided by the invention, passes through hydroxide
Soda lye pre-absorption, the biabsorption reaction that iron-based ionic liquid reabsorbs make a whole set of desulphurization system not only adapt to high temperature, complicated
Sulfur-containing smoke gas situation, moreover it is possible to reach higher desulfurization dust-removing efficiency.
Detailed description of the invention
Fig. 1 is the structural front view of the embodiment of the present invention 1；
Fig. 2 is the structural front view of the embodiment of the present invention 3；
Fig. 3 is A-A cross-sectional view of the invention；
Fig. 4 is B-B cross-sectional view of the invention；
Fig. 5 is the structural front view of the embodiment of the present invention 4.
Appended drawing reference are as follows: 1- fume pipe, 2- are sprayed baffle, 3- atomizer, 4- desulfurizing agent delivery pipe, the first desulfurization of 401-
Agent delivery pipe, 402- the second desulfurizing agent delivery pipe, 5- Venturi tube, 6- ring-type ejection section, 7- desulfurizing agent reservoir, 701- first are de-
Sulphur agent reservoir, 702- the second desulfurizing agent reservoir, 8- delivery pump, 9- sedimentation basin, 10- outlet tube, 11- bracket, 12- desulfurization and dedusting
Tower, 13- ultrasonic unit, 14- demister washer jet, 15- demister, the outlet of 16- cleaning flue gases.
Specific embodiment
Now in conjunction with embodiment, the invention will be further described.
Embodiment 1
Be sprayed venturi desulfation dust-extraction device as shown in Figure 1 for a kind of off line of embodiment of the invention, including with literary mound
In 5 both ends of the pipe fume pipe 1, desulfurizing agent delivery pipe 4, desulfurized dust collection column 12 and the sedimentation basin 9 that connect, set at the top of desulfurized dust collection column 12
There are cleaning flue gases to export 14,12 bottom of desulfurized dust collection column is equipped with outlet tube 10 and bracket 11；The desulfurizing agent delivery pipe 4 passes through defeated
Pump is sent 8 to connect with desulfurizing agent reservoir 7, as shown in figure 3, the fume pipe 1 is tangentially connected in 12 tower body bottom of desulfurized dust collection column, with
Spraying baffle 2 equipped with multilayer arrangement in the fume pipe 1 of 5 entrance of the Venturi tube connection, spraying 2 bottom end of baffle are set
There is atomizer 3, spraying 2 arrival end of baffle is connect with desulfurizing agent delivery pipe 4；12 bottom of desulfurized dust collection column is equipped with outlet tube 10,
Outlet tube 10 is connected to 9 top of sedimentation basin；8 entrance of delivery pump is connected to desulfurizing agent reservoir 7；The outlet of delivery pump 8 is conveyed with desulfurizing agent
Pipe 4 is connected to；Desulfurizing agent delivery pipe 4 is connected to atomizer 2；Sedimentation basin 9 and desulfurizing agent reservoir 7 are close to the two is by being lower than pond
The partition wall of body connects, and after 9 liquid level of sedimentation basin is more than at the top of partition wall, supernatant is entered in desulfurizing agent reservoir 7 by partition wall overflow, by
Reuse in 8 pumped back desulfation dust-extraction device of delivery pump.Ultrasonic unit 13, ultrasonic unit are additionally provided in the desulfurized dust collection column
13 tops are additionally provided with demister 15 and demister washer jet 14, and the demister 15 is set to 12 top of desulfurized dust collection column, foam removal
Device washer jet 14 is set to 15 lower section of demister.According to the size of desulfurating dust-removing equipment and treatment effect requirement, one can be set
Layer or multilayer spraying baffle 2, each layer, which is sprayed baffle 2, can be set one or more atomizers 3；By spraying baffle 2, atomization
One or more units can be set into the unit that nozzle 3 and Venturi tube 5 form.
On fume pipe 1, front and back is disposed with multistage atomizing nozzle 3, and the flue gas progress of desulfurizing agent and relatively high flow velocity is more
Secondary Shocks meet mixing, and due to the effect of spraying baffle 2, air-flow is formed in the tube baffling, have longer mixing desulfurization and dedusting
Then reaction time enters Venturi tube 5 jointly, accelerates suddenly in the contraction flow region flue gas flow rate of Venturi tube 5, with relative mass
Greatly, accelerate slower desulfurizing agent to form fierce impact, further strengthen the mass transfer immixture of desulfurizing agent and flue gas, thus real
The abundant mass transfer of existing desulfurization and dedusting liquid and flue gas mixes purpose.Then the gas-liquid mixture tangential direction of high speed enters cylindrical de-
12 tower body of sulphur gas wash tower, gas-liquid mixture are separated under the action of the centrifugal force, and liquid is under the effect of gravity along desulfurized dust collection column
12 inner walls flow to tower bottom, are finally discharged into sedimentation basin from outlet tube 10.Gas and a part of unsegregated minute liquid foam are by ultrasound
The ultrasonic wave effect that wave apparatus 13 generates, generates vibration, cohesion, electromagnetic adsorption etc., minute liquid foam and dust granules is made to become larger, into
Enter demister 15 further to separate, clean gas is discharged from cleaning flue gases outlet 16.Demister 15 is by demister washer jet
14 carry out periodic cleaning.
Embodiment 2
It is required according to the size of different desulfurating dust-removing equipments, treatment effect and investment cost, on the basis of embodiment 1
Ultrasonic unit 13 can be saved.
Embodiment 3
As shown in Fig. 2, unlike the first embodiment, spraying baffle 22 interlaced arrangement of spraying baffle adjacent thereto is in cigarette
In tracheae 1.As shown in figure 4,1 middle section of fume pipe of 5 entrance of the Venturi tube connection is additionally provided with cyclic annular ejection section 6, it is described
Cyclic annular 6 bottom annular of ejection section is evenly distributed with several atomizers 3.The exit diameter of cyclic annular ejection section 6 is less than inlet diameter, out
Diameter is 0.6~0.8 times of 1 internal diameter of fume pipe at mouthful.The small design of import large outlet makes 1 middle section of fume pipe form a class
Like the contraction mouth of Venturi tube, forming first order air-flow and change section, subsequent Venturi tube 5 forms second level air-flow and changes section,
Multi-stage airflow variation, enhances gas-liquid mixed, can effectively improve desulfurization and dedusting effect.
As a further improvement of the present invention, the spraying baffle 2 can also be formed in pipe horizontal by 30~45° angle
Inclined plate is also convenient for dust and flows downward while increasing air-flow traveling distance.
Embodiment 4
As shown in figure 5, as different from Example 3, desulfurizing agent reservoir is divided into the first reservoir 701 and the second reservoir 702, take off
Sulphur agent delivery pipe 4 is divided for the first desulfurizing agent delivery pipe 401 and the second desulfurizing agent delivery pipe 402, spraying 2 arrival end of baffle with
The connection of first desulfurizing agent delivery pipe 401, cyclic annular ejection section arrival end are connect with the second desulfurizing agent delivery pipe 402.
Flue gas enters in desulfation dust-extraction device from fume pipe 1, and the first desulfurizing agent delivery pipe 401 will be in the first reservoir 701
The sodium hydrate aqueous solution of first desulfurizing agent 5% is transported in fume pipe 1 and mixes with flue gas, carries out pre- desulfurization and dedusting；Second is de-
The iron-based ion doctor solution of the second desulfurizing agent in second reservoir 702 is passed through cyclic annular ejection section 6 and is transported to cigarette by sulphur agent delivery pipe 402
1 middle section of tracheae.The doctor solution that the iron-based ion doctor solution is iron-based ionic liquid, water, ethyl alcohol form, volume ratio 2:3:6.Its
In, iron-based ionic liquid the preparation method comprises the following steps: by chlorination 1- butyl -3- methylimidazole and FeCl3·6H2O is mixed by the molar ratio of 1:2
Conjunction is stirred to react for 24 hours, and institute's score layer solution goes to upper layer to obtain iron-based ionic liquid.In desulfation dust-extraction device, gas liquid ratio 5:1.
The iron-based ion doctor solution of second desulfurizing agent is mixed with flue gas, first and second desulfurizing agent absorb jointly absorption flue gas in sulfur and
Dust forms gas-liquid mixture；Gas-liquid mixture, which enters in Venturi tube 5, to be sufficiently mixed, flue gas in the contraction flow region of Venturi tube 4
Flow velocity is 30-70m/s, and mixed high-speed gas-liquid mixture is centrifuged after entering cylindrical desulfurized dust collection column 12 along a tangential direction
Separation adsorbs liquid along wall in 12 body of desulfurized dust collection column and flow to tower bottom, is finally discharged into precipitating from the outlet tube 10 of tower body bottom
Pond 9, gas and a part of unsegregated minute liquid foam further separate after the effect of ultrasonic unit 13, into demister 15,
Clean gas is discharged from cleaning flue gases outlet 16；Periodic cleaning demister 15 as needed.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is replaced on an equal basis.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (10)
1. multi-stage spray venturi desulfation dust-extraction device, including fume pipe (1), the desulfurizing agent being connect with Venturi tube (5) both ends
Delivery pipe (4), top are equipped with the desulfurized dust collection column (12) and sedimentation basin (9) of cleaning flue gases outlet (16), the desulfurizing agent conveying
Pipe (4) is connect by delivery pump (8) with desulfurizing agent reservoir (7), and the fume pipe (1) is tangentially connected in desulfurized dust collection column (12) bottom
Portion, which is characterized in that several spraying baffle (2), institute are equipped in the fume pipe (1) connecting with the Venturi tube (5) entrance
Spraying baffle (2) bottom end is stated equipped with atomizer (3), spraying baffle (2) arrival end is connect with desulfurizing agent delivery pipe (4)；Desulfurization
Gas wash tower (12) bottom is equipped with outlet tube (10), and outlet tube (10) is connected to above sedimentation basin (9).
2. multi-stage spray venturi desulfation dust-extraction device according to claim 1, which is characterized in that any spraying gear
Plate (2) spraying baffle (2) interlaced arrangement adjacent thereto is in fume pipe (1)；Any spraying baffle (2) horizontal by
30~45° angle.
3. multi-stage spray venturi desulfation dust-extraction device according to claim 1, which is characterized in that the Venturi tube
(5) fume pipe (1) middle section of entrance connection is additionally provided with cyclic annular ejection section (6), and described ring-type ejection section (6) bottom annular is uniformly distributed
Several atomizers (3).
4. multi-stage spray venturi desulfation dust-extraction device according to claim 3, which is characterized in that the ring-type ejection section
(6) exit diameter is less than inlet diameter, exit diameter: fume pipe (1) internal diameter is 0.6~0.8.
5. multi-stage spray venturi desulfation dust-extraction device according to claim 3, which is characterized in that desulfurizing agent reservoir is divided into
First reservoir (701) and the second reservoir (702), desulfurizing agent delivery pipe (4) are divided into the first desulfurizing agent delivery pipe (401) and second de-
Sulphur agent delivery pipe (402), spraying baffle (2) arrival end are connect with the first desulfurizing agent delivery pipe (401), and cyclic annular ejection section enters
Mouth end is connect with the second desulfurizing agent delivery pipe (402).
6. multi-stage spray venturi desulfation dust-extraction device according to claim 1, which is characterized in that the desulfurized dust collection column
Inside it is additionally provided with ultrasonic unit (13).
7. multi-stage spray venturi desulfation dust-extraction device according to claim 6, which is characterized in that the desulfurized dust collection column
(12) demister (15) and demister washer jet (14), the demister (15) are additionally provided in, above ultrasonic unit (13)
At the top of desulfurized dust collection column (12), demister washer jet (14) is set to below demister (15).
8. a kind of desulfurization and dust-removal method, using any multi-stage spray venturi desulfation dust-extraction device of claim 1~7,
It is characterized by comprising the following steps:
A, flue gas enters in desulfation dust-extraction device from fume pipe (1), and the first desulfurizing agent delivery pipe (401) is by the first reservoir (701)
The first interior desulfurizing agent is transported in fume pipe (1) and mixes with flue gas；
B, the second desulfurizing agent in the second reservoir (702) is passed through cyclic annular ejection section (6) and conveyed by the second desulfurizing agent delivery pipe (402)
To fume pipe (1) middle section, the second desulfurizing agent is mixed with flue gas, first and second desulfurizing agent absorbs the sulfur and powder in absorption flue gas
Dirt；
C, gas-liquid mixture enters in Venturi tube (5) and is sufficiently mixed, and flue gas flow rate is 30- in the contraction flow region of Venturi tube (4)
70m/s, mixed high-speed gas-liquid mixture enter cylindrical desulfurized dust collection column (12) along a tangential direction and are centrifugated afterwards, inhale
Along desulfurized dust collection column (12), wall flow to tower bottom to attached liquid body in vivo, is finally discharged into sedimentation basin from the outlet tube (10) of tower body bottom
(9), gas and a part of unsegregated minute liquid foam further divide after ultrasonic unit (13) act on into demister (15)
From clean gas is discharged from cleaning flue gases outlet (16)；
D, periodic cleaning demister.
9. desulfurization and dust-removal method according to claim 8, which is characterized in that it is 5 that first desulfurizing agent, which is mass concentration,
~15% sodium hydroxide solution, second desulfurizing agent are iron-based ion doctor solution, and the iron-based ion doctor solution is iron-based
The doctor solution that ionic liquid, water, ethyl alcohol form, volume ratio 2:3:6, gas liquid ratio are 3~5:1.
10. desulfurization and dust-removal method according to claim 8, which is characterized in that the acting frequency of ultrasonic unit (13) is
45~250KHz, the sound intensity are 0.2~0.5KW/m2。
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