CN106377987A - Flue gas wet-process denitration device and flue gas wet-process denitration method - Google Patents
Flue gas wet-process denitration device and flue gas wet-process denitration method Download PDFInfo
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- CN106377987A CN106377987A CN201610784987.XA CN201610784987A CN106377987A CN 106377987 A CN106377987 A CN 106377987A CN 201610784987 A CN201610784987 A CN 201610784987A CN 106377987 A CN106377987 A CN 106377987A
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- Prior art keywords
- flue gas
- alkali liquor
- bubbling bed
- absorption tower
- oxide layer
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- 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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- 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
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/106—Peroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
-
- 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 provides a flue gas wet-process denitration device and a flue gas wet-process denitration method. The flue gas wet-process denitration device provided by the invention comprises an alkali liquid absorption tower (9) and a bubbling bed oxidization layer (1) connected to a gas inlet end of the alkali liquid absorption tower (9); NO is oxidized into NO2 through the bubbling bed oxidization layer (1), and NO2 is absorbed and denitrified by the alkali liquid absorption tower (9); the denitration efficiency is high, and the device can be used for denitration treatment of flue gas with high NO content.
Description
Technical field
The present invention relates to environmental technology field, particularly to a kind of flue gas wet denitration device and flue gas wet denitration side
Method.
Background technology
With China's expanding economy, the environmental pollution bringing in energy-consuming is increasingly severe, adds China to SO2
The reinforcement of emission control and the increase of automobile quantity, NOxProgressively will be forereached SO to the contribution of acid rain2, our times various countries
Government pays much attention to NOxEmission control, many countries have formulated strict NOxDischarge standard.
At present, the dry fume denitration technology mainly selective catalytic reduction method (SCR) of research both at home and abroad, selectivity is non-
Catalytic reduction method (SNCR), absorption method, energetic plasma oxidizing process etc., SCR and SNCR is industrially applied, but
SCR method there is investment and operating cost is high, catalyst easy in inactivation, discharges N2O and NH3Deng secondary pollution, operating temperature range is narrow
Etc. defect；It is low to there is denitration efficiency in SNCR method, and operation temperature is high, and the shortcomings of NH_3 leakage；There is adsorption capacity not in absorption method
Enough big, resistance is larger, the shortcomings of regeneration is complex；There is the flue gas energy consumption processing unit volume in energetic plasma oxidizing process
Higher, required equipment and maintenance cost high, the shortcomings of device structure is complicated.
And wet denitration technology has process equipment simply, operation temperature is low, less energy consumption, the low advantage of processing cost.Mesh
Before, flue gas wet denitration technology mainly includes alkali absorption method, sour absorption process, oxidative absorption method, reducing absorping method, microbial method
And Absorption via Chemical Complexation.Wet flue gas denitration equipment mainly has packed tower absorption equipment and spray column absorption equipment.
Because NO is not acted on water and alkali substantially, the dissolubility in water is also very low, and therefore wet method typically only applies to locate
Reason contains NO2NO more than 50%xWaste gas is not it is impossible to the NO in removing flue gas is suitable for burning waste gas denitration.
Content of the invention
It is an object of the invention to provide a kind of flue gas wet denitration device and flue gas wet denitration method.The present invention carries
For flue gas wet denitration device can remove NO, achievable NO in flue gas2/ NO flue gas efficiently out of stock.
The invention provides a kind of flue gas wet denitration device, including alkali liquor absorption tower (9) and with described alkali liquor absorption
The bubbling bed oxide layer (1) that tower (9) inlet end connects.
Preferably, liquid filling body oxidant in described bubbling bed oxide layer (1).
Preferably, described liquid oxidizer includes hydrogen peroxide.
Preferably, the inlet end of described bubbling bed oxide layer (1) is connected with air inlet pipe (8).
Preferably, described alkali liquor absorption tower (9) inclusion is sequentially communicated gas distribution grid (7), absorbed layer (3) and escape pipe
(6) liquid distributor (4) that, and with the water inlet end of described absorbed layer (3) connects and connecting with the water side of described absorbed layer (3)
Outlet pipe (2), the inlet end of described gas distribution grid (7) is connected with the outlet side of bubbling bed oxide layer (1).
Preferably, it is filled with alkali liquor in described absorbed layer (3).
Preferably, the water inlet end of described liquid distributor (4) is connected with and water inlet pipe (5).
Present invention also offers a kind of flue gas wet denitration method, carry out denitration using technique scheme described device,
Comprise the following steps：
A () pending flue gas enters bubbling bed oxide layer (1), oxidation reaction obtains aoxidizing flue gas；
B the oxidation flue gas obtaining in () described step (a) enters alkali liquor absorption tower (9), be neutralized reaction.
Preferably, described step (b) is specially：Oxidation flue gas enters absorbed layer (3) by gas distribution grid (7), with alkali
Liquid occurs neutralization reaction to obtain denitration flue gas.
Preferably, described alkali liquor passes through water inlet pipe (5) and liquid distributor (4) enters absorbed layer (3).
The present invention provide flue gas wet denitration device include alkali liquor absorption tower (9) and with described alkali liquor absorption tower (9)
The bubbling bed oxide layer (1) that inlet end connects, is oxidized to NO by bubbling bed oxide layer (1) NO2, then through alkali liquor absorption tower
(9) absorb NO2Denitration, denitration efficiency is high, can be used for the denitration process of the high flue gas of NO content.
Brief description
Fig. 1 is the schematic diagram of flue gas wet denitration device provided in an embodiment of the present invention, and wherein, 1 is bubbling bed oxide layer,
2 is outlet pipe, and 3 is absorbed layer, and 4 is liquid distributing board, and 5 is water inlet pipe, and 6 is escape pipe, and 7 is gas distribution grid, and 8 is air inlet
Pipe, 9 is alkali liquor absorption tower.
Specific embodiment
The invention provides a kind of flue gas wet denitration device, including alkali liquor absorption tower (9) and with described alkali liquor absorption
The bubbling bed oxide layer (1) that tower (9) inlet end connects.
The out of stock device of flue gas wet method that the present invention provides includes bubbling bed oxide layer, in the present invention, described bubbling bed oxygen
Change in layer (1) and be preferably filled with liquid oxidizer；Described liquid oxidizer is preferably hydrogen peroxide.In the present invention, described liquid
The loading of oxidant is preferably 50～100%, more preferably 60～80%.
As shown in figure 1, in one embodiment of the invention, described bubbling bed oxide layer (1) and alkali liquor absorption tower (9) phase
Offside even is provided with inlet end, and described inlet end is connected with air inlet pipe (8).
The device that the present invention provides includes the alkali liquor absorption tower (9) being connected with the outlet side of described bubbling bed oxide layer (1),
The present invention does not have special restriction to the structure of described alkali liquor absorption tower (9), using well known to those skilled in the art for wet
The alkali liquor absorption tower of method denitration.As shown in figure 1, in an embodiment of the present invention, described alkali liquor absorption tower (9) is included successively
The gas distribution grid (7) of connection, absorbed layer (3) and escape pipe (6), and the cloth connecting with the water inlet end of described absorbed layer (3)
Outlet pipe (2), the inlet end of described gas distribution grid (7) and drum that liquid device (4) and the water side with described absorbed layer (3) connect
The outlet side connection of bubble bed oxide layer (1).
In an embodiment of the present invention, it is filled with alkali liquor in described absorbed layer (3).The present invention does not have to the species of described alkali liquor
There is special restriction, NO can be absorbed using well known to those skilled in the art2Alkali liquor.In the present invention, described alkali
The loading of liquid is preferably 50～100%, more preferably 60～80%.
In an embodiment of the present invention, the water inlet end of described liquid distributor (4) is connected with water inlet pipe (5).
Present invention also offers a kind of flue gas wet denitration method, carry out denitration using technique scheme described device,
Comprise the following steps：
A () pending flue gas enters bubbling bed oxide layer (1), oxidation reaction obtains aoxidizing flue gas；
B the oxidation flue gas obtaining in () described step (a) enters alkali liquor absorption tower (9), neutralization reaction obtains denitration flue gas.
The present invention makes pending flue gas enter bubbling bed oxide layer (1), and oxidation reaction obtains aoxidizing flue gas.In the present invention
In, there is oxidation reaction, the NO quilt in described flue gas with liquid oxidizer in bubbling bed oxide layer (1) in described pending flue gas
It is oxidized to NO2.In the present invention, described pending flue gas and the volume ratio of liquid oxidizer are preferably 1:2～8, more preferably
1:4～6.In the present invention, the temperature of described oxidation reaction is preferably more than 0 DEG C, more preferably room temperature.
After obtaining aoxidizing flue gas, described oxidation flue gas enters alkali liquor absorption tower (9), and neutralization reaction obtains denitration flue gas.?
In the present invention, described oxidation flue gas preferably enters absorbed layer (3) by gas distribution grid (7), occurs neutralization reaction to obtain with alkali liquor
To denitration flue gas.In the present invention, the NO in described oxidation flue gas2By alkali liquor absorption in absorbed layer, obtain denitration flue gas.?
In the present invention, described oxidation flue gas is preferably 1 with the volume ratio of alkali liquor:2～8, more preferably 1:4～6.In the present invention, institute
The temperature stating neutralization reaction is preferably more than 0 DEG C, more preferably room temperature.
In the present invention, described alkali liquor preferably passes through water inlet pipe (5) and liquid distributor (4) enters absorbed layer (3).In the present invention
In, described alkali liquor preferably in absorbed layer (3) absorbs NO2Pass through outlet pipe (2) afterwards to discharge.In the present invention, described liquid distributor
(4) alkali liquor can be made to be fully contacted with oxidation flue gas, improve denitration efficiency.
The above is only the preferred embodiment of the present invention, and not the present invention is made with any pro forma restriction.Should
Point out, for those skilled in the art, under the premise without departing from the principles of the invention, if can also make
Dry improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of flue gas wet denitration device, is connected including alkali liquor absorption tower (9) and with described alkali liquor absorption tower (9) inlet end
Bubbling bed oxide layer (1).
2. device according to claim 1 is it is characterised in that liquid filling body oxidant in described bubbling bed oxide layer (1).
3. device according to claim 2 is it is characterised in that described liquid oxidizer includes hydrogen peroxide.
4. the device according to claims 1 to 3 any one is it is characterised in that the air inlet of described bubbling bed oxide layer (1)
End is connected with air inlet pipe (8).
5. device according to claim 1 is it is characterised in that described alkali liquor absorption tower (9) includes the gas being sequentially communicated
Distribution grid (7), absorbed layer (3) and escape pipe (6), and the liquid distributor (4) that connects with the water inlet end of described absorbed layer (3) and with
Outlet pipe (2), the inlet end of described gas distribution grid (7) and the bubbling bed oxide layer of the water side connection of described absorbed layer (3)
(1) outlet side connection.
6. device according to claim 5 is it is characterised in that be filled with alkali liquor in described absorbed layer (3).
7. device according to claim 5 is it is characterised in that the water inlet end of described liquid distributor (4) is connected with water inlet pipe
(5).
8. a kind of flue gas wet denitration method, usage right require 1～7 in any one described device carry out out of stock, including with
Lower step：
A () pending flue gas enters bubbling bed oxide layer (1), oxidation reaction obtains aoxidizing flue gas；
B the oxidation flue gas obtaining in () described step (a) enters alkali liquor absorption tower (9), be neutralized reaction.
9. method according to claim 8 is it is characterised in that described step (b) is specially：Oxidation flue gas is divided by gas
Fabric swatch (7) enters absorbed layer (3), occurs neutralization reaction to obtain denitration flue gas with alkali liquor.
10. method according to claim 9 is it is characterised in that described alkali liquor passes through water inlet pipe (5) and liquid distributor (4) enters
Enter absorbed layer (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610784987.XA CN106377987A (en) | 2016-08-31 | 2016-08-31 | Flue gas wet-process denitration device and flue gas wet-process denitration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610784987.XA CN106377987A (en) | 2016-08-31 | 2016-08-31 | Flue gas wet-process denitration device and flue gas wet-process denitration method |
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| Publication Number | Publication Date |
|---|---|
| CN106377987A true CN106377987A (en) | 2017-02-08 |
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| CN201610784987.XA Pending CN106377987A (en) | 2016-08-31 | 2016-08-31 | Flue gas wet-process denitration device and flue gas wet-process denitration method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4419333A (en) * | 1980-03-01 | 1983-12-06 | Nukem Gmbh | Process for removal of nitrogen oxides |
| CN101306322A (en) * | 2008-02-22 | 2008-11-19 | 北京博奇电力科技有限公司 | Integrative coordinated desulfurization, denitration, demercuration device and technique using spray bubbling method |
| CN101785966A (en) * | 2010-03-02 | 2010-07-28 | 浙江菲达环保科技股份有限公司 | Method of advanced oxidation for NO in flue gas and device thereof |
| CN103007753A (en) * | 2012-12-31 | 2013-04-03 | 上海电气石川岛电站环保工程有限公司 | Heterogeneous Fenton reagent and preparation method and application thereof |
| CN203916431U (en) * | 2014-05-13 | 2014-11-05 | 浙江天蓝环保技术股份有限公司 | A kind of gaseous oxidation is in conjunction with the flue gas combined desulfurization and denitration device of wet absorption |
| CN204337995U (en) * | 2014-12-25 | 2015-05-20 | 北京从实和德环保科技有限公司 | A kind of Dume desulfurizing denitrogenation appts |
| CN105561769A (en) * | 2014-10-17 | 2016-05-11 | 华东理工大学 | Denitration device achieving denitration by using salt reinforcing hydrogen peroxide solution to oxidize NO and denitration method |
| CN105727712A (en) * | 2016-04-29 | 2016-07-06 | 济南乾坤环保设备有限公司 | Desulphurization, denitrification and dust removal integrated equipment of flue gas of coal-fired ceramic tunnel kiln |
-
2016
- 2016-08-31 CN CN201610784987.XA patent/CN106377987A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4419333A (en) * | 1980-03-01 | 1983-12-06 | Nukem Gmbh | Process for removal of nitrogen oxides |
| CN101306322A (en) * | 2008-02-22 | 2008-11-19 | 北京博奇电力科技有限公司 | Integrative coordinated desulfurization, denitration, demercuration device and technique using spray bubbling method |
| CN101785966A (en) * | 2010-03-02 | 2010-07-28 | 浙江菲达环保科技股份有限公司 | Method of advanced oxidation for NO in flue gas and device thereof |
| CN103007753A (en) * | 2012-12-31 | 2013-04-03 | 上海电气石川岛电站环保工程有限公司 | Heterogeneous Fenton reagent and preparation method and application thereof |
| CN203916431U (en) * | 2014-05-13 | 2014-11-05 | 浙江天蓝环保技术股份有限公司 | A kind of gaseous oxidation is in conjunction with the flue gas combined desulfurization and denitration device of wet absorption |
| CN105561769A (en) * | 2014-10-17 | 2016-05-11 | 华东理工大学 | Denitration device achieving denitration by using salt reinforcing hydrogen peroxide solution to oxidize NO and denitration method |
| CN204337995U (en) * | 2014-12-25 | 2015-05-20 | 北京从实和德环保科技有限公司 | A kind of Dume desulfurizing denitrogenation appts |
| CN105727712A (en) * | 2016-04-29 | 2016-07-06 | 济南乾坤环保设备有限公司 | Desulphurization, denitrification and dust removal integrated equipment of flue gas of coal-fired ceramic tunnel kiln |
Non-Patent Citations (1)
| Title |
|---|
| 柏源等: "燃煤烟气H2O2脱硝性能影响因素的实验研究", 《化工进展》 * |
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Application publication date: 20170208 |