CN104069724A - Sintering flue gas seawater desulfurization system and desulfurization method - Google Patents
Sintering flue gas seawater desulfurization system and desulfurization method Download PDFInfo
- Publication number
- CN104069724A CN104069724A CN201310100894.7A CN201310100894A CN104069724A CN 104069724 A CN104069724 A CN 104069724A CN 201310100894 A CN201310100894 A CN 201310100894A CN 104069724 A CN104069724 A CN 104069724A
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- CN
- China
- Prior art keywords
- seawater
- gas
- flue gas
- spray column
- enters
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- 239000013535 sea water Substances 0.000 title claims abstract description 70
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 31
- 230000023556 desulfurization Effects 0.000 title claims abstract description 27
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 239000003546 flue gas Substances 0.000 title claims abstract description 25
- 238000005245 sintering Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims description 21
- 239000007921 spray Substances 0.000 claims abstract description 29
- 239000007789 gas Substances 0.000 claims abstract description 20
- 239000000654 additive Substances 0.000 claims abstract description 19
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000000996 additive effect Effects 0.000 claims abstract description 18
- 238000005273 aeration Methods 0.000 claims abstract description 17
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 13
- 239000012670 alkaline solution Substances 0.000 claims abstract description 7
- 239000003517 fume Substances 0.000 claims description 22
- 238000010521 absorption reaction Methods 0.000 claims description 13
- 210000002966 serum Anatomy 0.000 claims description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Substances [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 159000000000 sodium salts Chemical class 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000012716 precipitator Substances 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The invention discloses a sintering flue gas seawater desulfurization system, wherein an additive slurry tank and an additive control system are arranged on a pipeline before seawater enters a spray tower, sintering flue gas enters a gas-gas heat exchanger after passing through an electric precipitator, the flue gas reacts with seawater in the spray tower after entering the spray tower, and an alkaline solution with the concentration of 0.3-0.6mol/L is added into the spray tower through the additive slurry tank, so that the liquid-gas ratio is controlled to be 2-5: 1L/m3Heating to above dew point in the gas-gas heat exchanger, and discharging from chimney; the seawater absorbing sulfur dioxide is discharged into a liquid discharge tank from the bottom of the spray tower, then is aerated and oxidized in an aeration tank, finally enters a mixing tank, is mixed with fresh seawater and then is discharged after reaching the standard. The natural alkalinity of the seawater is utilized, a small amount of additives are added to desulfurize the sintering flue gas, the generated sodium salt does not pollute the ocean, and meanwhile, the operation cost of desulfurizing the sintering flue gas can be reduced.
Description
Technical field
The invention belongs to the environmental protection technical field of sintering flue gas desulfurization, relate in particular to a kind of sintering fume seawater desulfurization system and sulfur method.
Background technology
Natural sea-water is alkalescence conventionally, makes seawater have natural soda acid buffer capacity and the ability of sulfur dioxide absorption.Sea water desulfuration technology comes from U.S.'s Guam test of 1981 in the application of thermal power plant, within 1988 subsequently and 1994, successively build up seawater desulfurization device in TATA Utilities Electric Co. of India, and nineteen ninety-five, Spain set up 4 cover seawater desulfurization devices.Seawater desulfurizing process has a lot of successful experiences on treatment of Power flue gas.But up to the present, do not have the sinter fume of iron and steel enterprise to adopt seawater desulfurizing process.For sea water desulfuration, one of main operating cost is power consumption, because sinter fume sulfur content is low compared with power-plant flue gas, so sintering fume seawater desulfurization is suitable.
New by looking into, retrieve some relevant patents.(CN101732961A) invent as " a kind of seawater desulfurizing process ", the natural basicity of this patent utilization seawater is carried out desulfurization, is applicable to the flue gas desulfurization processing such as power plant." a kind of sea water desulfuration method and apparatus and heat-exchange system " (CN 102029104A) invention provides a kind of characteristic of utilizing seawater to wash the sulfur dioxide in flue gas, reaches the object sulfur removal technology of gas cleaning." the flue gas Deuslfurizing system for sea water of application boiler blowdown water " (CN 102343209A) invention utilizes boiler blowdown water and sea water mixing, can improve the alkalescence of absorption liquid, thereby increase desulfuration efficiency." Deuslfurizing system for sea water " (CN101143299A) invented, and this invention is mainly for exhaust gas volumn, and the parameter such as basicity and the temperature macro-control of sulfur content, seawater is adjusted in time seawater and distributed and aeration rate when parameter changes.
Existing seawater desulfurizing process cannot meet sintering flue gas desulfurization.Therefore inventing the seawater desulfurizing process that a kind of operating cost is cheap is highly significant.
Summary of the invention
The invention provides a kind of steel enterprise sintering flue gas seawater desulfurizing process, utilize the natural basicity of seawater and add a small amount of additive to carry out desulfurization to sinter fume, the sodium salt of generation does not produce pollution to ocean, can reduce the operating cost of sintering flue gas desulfurization simultaneously.
Concrete technical scheme of the present invention is:
This method is mainly to utilize the natural basicity of seawater to carry out desulfurization to sinter fume, adds a small amount of additive simultaneously, reduces liquid-gas ratio, reduces operating cost.
One of technical solution of the present invention, a kind of sintering fume seawater desulfurization system, comprises that sinter fume is by the electric cleaner of pipeline process, gas-to-gas heat exchanger, spray column, chimney; Seawater enters clean-up pit by the pipeline spray column of flowing through, and aeration tank and mixing pit, is characterized in that: additive serum pot and additive control system are set on the pipeline before seawater enters spray column.
Two of technical solution of the present invention, sintering fume seawater desulfurization method, it is characterized in that: sinter fume is after electric cleaner, the hot side that enters airair heat exchanger (GGH) lowers the temperature to improve the sulfur dioxide absorption efficiency in absorption tower, heat is passed to the gas after desulfurizing and purifying simultaneously, made more than gas temperature after desulfurizing and purifying reaches dew point.Flue gas enters after spray column, reacts with the seawater in spray column, and in spray column, adding concentration by additive serum pot is the alkaline solution of 0.3-0.6mol/L, makes liquid-gas ratio be controlled at 2-5:1 L/m
3, be warmed up to dew point in GGH more than, discharged by chimney; The seawater of sulfur dioxide absorption enters clean-up pit by spray column bottom, and then aeration oxidation in aeration tank, finally enters mixing pit, mixes then qualified discharge with fresh seawater.
Alkaline solution can be NaOH, KOH, Na
2cO
3, NaHCO
3any one solution.
A kind of patent of sintering fume seawater desulfurization technique can be applied to iron and steel enterprise by seawater desulfurizing process.Current existing seawater desulfurizing process is widely used at power plant desulfurization, but very not applicable sintering flue gas desulfurization, the example of not applying in iron and steel enterprise.This patent can well address this problem, and the operating cost that reduces sintering flue gas desulfurization can not pollute ocean simultaneously.
Brief description of the drawings
Fig. 1 is a kind of process chart of sintering fume seawater desulfurization.
Wherein, 1 chimney, 2 blower fans, 3 bypass valves, 4 electric cleaners, 5 gas-to-gas heat exchangers, 6 inlet flue gas monitoring systems, 7 spray columns, 8 demisters, 9 sprayers, 10 absorption tower seawater control systems, 11 additive serum pots, 12 additive control systems, 13 Aeration fans, 14 clean-up pits, 15 aeration tanks, 16 aeration tank PH monitoring systems, 17 mixing pit PH monitoring systems, 18 mixing pit seawater control systems, 19 mixing pits.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
A kind of sintering fume seawater desulfurization system, comprises that sinter fume is by the electric cleaner 4 of pipeline process, gas-to-gas heat exchanger 5, spray column 7, chimney 1; Seawater enters clean-up pit 14 by the pipeline spray column 7 of flowing through, and aeration tank 15 and mixing pit 19, arrange additive serum pot 11 and additive control system 12 on the pipeline before seawater enters spray column 7.
Absorption tower seawater control system 10 is arranged between sprayer 9 and additive control system 12.
Inlet flue gas monitoring system 6 is arranged between gas-to-gas heat exchanger 5 and spray column 7, is mainly that the concentration of the sulfur dioxide to entering spray column 7 and flow record with absorption tower seawater control system 10 and additive control system 12 and match.
Aeration tank PH monitoring system 16 is arranged between aeration tank 15 and mixing pit 19, records seawater pH value and reaches more than 5.8, enters mixing pit.
Mixing pit PH monitoring system 17 is arranged in mixing pit 19, mixing pit seawater control system 18 is arranged on the pipeline that fresh seawater enters mixing pit 19, under the control of mixing pit PH monitoring system and mixing pit seawater control system, make pH value in mixing pit be greater than 6.5, can up to standardly enter ocean.
Blower fan 2 is arranged between chimney 1 and gas-to-gas heat exchanger 5.
Bypass valve 3 is arranged between electric cleaner 4 and blower fan 2, if desulphurization plant keeps in repair, bypass valve is opened, and flue gas directly discharges.
Sinter fume is after electric cleaner 4, enter airair heat exchanger 5 (GGH), flue gas enters after spray column 7, by the sprayer 9 in spray column 7 by seawater with vaporific ejection, flue gas is fully reacted with the seawater of spray column, and demister 8 effects are to reduce steam to enter chimney.It is the alkaline solution of 0.4mol/L that seawater in spray absorber adds concentration by additive serum pot 11, makes liquid-gas ratio be controlled at 2-5:1 L/m
3, reacted flue gas is discharged by chimney 1 be warmed up to dew point in airair heat exchanger 5GGH more than; The seawater of sulfur dioxide absorption enters clean-up pit 14 by spray-absorption tower bottom, and then aeration oxidation in aeration tank 15, finally enters mixing pit 19, mixes then qualified discharge with fresh seawater.
Alkaline solution, liquid-gas ratio are as shown in table 1.
Aeration tank PH monitoring system 16 records seawater pH value and reaches more than 5.8, enters mixing pit 19.
Under the control of mixing pit PH monitoring system 17 and mixing pit seawater control system 18, make pH value in mixing pit be greater than 6.5, can up to standardly enter ocean.
Chemical equation involved in the present invention is:
SO
2+2OH
-=SO
3 2-+H
2O
SO
2+CO
3 2-=SO
3 2-+CO
2
SO
2+2HCO
3 -=SO
3 2-+CO
2+H
2O
SO
3 2-+SO
2+H
2O=2HSO
3 -
2SO
3 2-+O
2=2SO
4 2-
Table 1
Claims (3)
1. a sintering fume seawater desulfurization system, comprises that sinter fume is by the electric cleaner (4) of pipeline process, gas-to-gas heat exchanger (5), spray column (7), chimney (1); Seawater enters clean-up pit (14) by the pipeline spray column (7) of flowing through, aeration tank (15) and mixing pit (19), is characterized in that: enter additive serum pot (11) and additive control system (12) are set on spray column (7) pipeline before at seawater.
2. one kind is utilized the sintering fume seawater desulfurization method of sintering fume seawater desulfurization system described in claim 1, it is characterized in that: sinter fume is after electric cleaner (4), the hot side that enters airair heat exchanger (5) lowers the temperature to improve the sulfur dioxide absorption efficiency in absorption tower, heat is passed to the gas after desulfurizing and purifying simultaneously, make more than gas temperature after desulfurizing and purifying reaches dew point, flue gas enters after spray column (7), react with the seawater in spray column, in spray column, adding concentration by additive serum pot (11) is the alkaline solution of 0.3-0.6mol/L, make liquid-gas ratio be controlled at 2-5:1 L/m
3, be warmed up to dew point in airair heat exchanger (5) more than, discharged by chimney (1), the seawater of sulfur dioxide absorption enters clean-up pit (14) by spray column bottom, and then aeration oxidation in aeration tank (15), finally enters mixing pit (19), mixes then qualified discharge with fresh seawater.
3. sintering fume seawater desulfurization method according to claim 2, is characterized in that: alkaline solution is NaOH KOH, Na
2cO
3, NaHCO
3any one solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310100894.7A CN104069724A (en) | 2013-03-27 | 2013-03-27 | Sintering flue gas seawater desulfurization system and desulfurization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310100894.7A CN104069724A (en) | 2013-03-27 | 2013-03-27 | Sintering flue gas seawater desulfurization system and desulfurization method |
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| Publication Number | Publication Date |
|---|---|
| CN104069724A true CN104069724A (en) | 2014-10-01 |
Family
ID=51591569
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310100894.7A Pending CN104069724A (en) | 2013-03-27 | 2013-03-27 | Sintering flue gas seawater desulfurization system and desulfurization method |
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| Country | Link |
|---|---|
| CN (1) | CN104069724A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108525501A (en) * | 2017-07-24 | 2018-09-14 | 丁武轩 | Apparatus for desulfurizing exhaust gas |
| CN108704446A (en) * | 2018-06-04 | 2018-10-26 | 广州引航者信息科技有限公司 | A kind of marine exhaust desulfurizer and method |
| CN110657438A (en) * | 2018-06-28 | 2020-01-07 | 上海卓佑实业有限公司 | Treatment process of waste combustion gas |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101636217A (en) * | 2006-09-05 | 2010-01-27 | 克鲁有限公司 | Desulfurization process for flue gases |
| CN102407067A (en) * | 2010-09-21 | 2012-04-11 | 鞍钢股份有限公司 | Sintering flue gas seawater desulfurization process and desulfurization system |
-
2013
- 2013-03-27 CN CN201310100894.7A patent/CN104069724A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101636217A (en) * | 2006-09-05 | 2010-01-27 | 克鲁有限公司 | Desulfurization process for flue gases |
| CN102407067A (en) * | 2010-09-21 | 2012-04-11 | 鞍钢股份有限公司 | Sintering flue gas seawater desulfurization process and desulfurization system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108525501A (en) * | 2017-07-24 | 2018-09-14 | 丁武轩 | Apparatus for desulfurizing exhaust gas |
| CN108636076A (en) * | 2017-07-24 | 2018-10-12 | 丁武轩 | A kind of desulfurizer |
| CN108704446A (en) * | 2018-06-04 | 2018-10-26 | 广州引航者信息科技有限公司 | A kind of marine exhaust desulfurizer and method |
| CN110657438A (en) * | 2018-06-28 | 2020-01-07 | 上海卓佑实业有限公司 | Treatment process of waste combustion gas |
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Application publication date: 20141001 |