CN106422715A - Integrated wet-process flue gas purifying system and flue gas purifying method - Google Patents
Integrated wet-process flue gas purifying system and flue gas purifying method Download PDFInfo
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- CN106422715A CN106422715A CN201610544719.0A CN201610544719A CN106422715A CN 106422715 A CN106422715 A CN 106422715A CN 201610544719 A CN201610544719 A CN 201610544719A CN 106422715 A CN106422715 A CN 106422715A
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- Prior art keywords
- flue gas
- absorption tower
- circulating pump
- temperature plasma
- washing absorption
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- 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
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
-
- 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
- B01D53/64—Heavy metals or compounds thereof, e.g. mercury
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/60—Heavy metals or heavy metal compounds
- B01D2257/602—Mercury or mercury compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/818—Employing electrical discharges or the generation of a plasma
Abstract
The invention relates to an integrated wet-process flue gas purifying system and a flue gas purifying method. The integrated wet-process flue gas purifying system comprises a pretreatment device, a low-temperature plasma oxidation device, a washing absorption tower, a byproduct recycling device and a chimney, wherein the low-temperature plasma oxidation device is mounted on a pipe between the pretreatment device and the washing absorption tower, and is communicated with the flue gas inlet of the washing absorption tower; the washing absorption tower comprises a wet-process electrostatic deduster, a demister, an upper-loop sprinkling layer, a tray, a lower-loop sprinkling layer and a tower kettle from top to bottom. The flue gas purifying method comprises the following steps: preliminarily filtering and dedusting flue gas in the pretreatment device; oxidizing the flue gas in the low-temperature plasma oxidation device; enabling the flue gas to enter the washing absorption tower, and desulfurizing, denitrifying and removing mercury through alkaline water sprinkling; further dedusting and purifying the flue gas by the wet-process electrostatic deduster, and discharging the flue gas from the chimney. The integrated wet-process flue gas purifying system is low in energy consumption and safe and reliable in equipment operation and can treat a variety of pollutants at the same time.
Description
Technical field
The present invention relates to the smoke gas treatment technical field such as metallurgy, sintering machine, coal-burning boiler, chemical industry is and in particular to a kind of collect
Become wet type flue gas desulphurization system and flue gas purifying method.
Background technology
At present, contained SO in the flue gas or industrial tail gas of the discharge of the industries such as coal fired power generation, metallurgy, chemical industryx（Sulphur oxygen
Compound）、NOx（Nitrogen oxides）And heavy metal（Mercurous heavy metal）Deng pollutant, environment is caused with serious pollution.With
The increasingly stringent of pollutant catabolic gene standard it is necessary to remove to multiple pollutant simultaneously, but if to multi-pollutant respectively
Removing then needs to introduce many complete equipments, and faces the problems such as investment is huge, and floor space is many.Multi-pollutant is removed simultaneously can
It is prevented effectively from the problems referred to above, thus worldwide extensively carried out the research to smoke multi-pollutant control technology.
The active coke absorption method desulphurization and denitration method risen, even if carried out desulfurization, taken off using set of device simultaneously
Set of device is also divided into two sections of before and after and carries out desulfurization or denitration process respectively by nitre, and denitration efficiency low be only 30～
40%, SR is big, and system energy consumption is higher.In addition, the method adopts activated coke moving bed to adsorb, the activated coke after absorption
Deliver to desorber through conveyer, after desorption, then through conveyer, activated coke is delivered to adsorption tower.This cyclic process is lived
Property Jiao breakage occur, granularity reduces it is necessary to exclude short grained coke powder, is continuously replenished new activated coke, and activated coke is used
Amount is quite big.Whole system equipment is many, complex structure, high energy consumption, easily produces fault, can affect the normal operation of system.
Popularization and application are extremely difficult now, and utilization rate is than relatively low.
Content of the invention
The purpose of the present invention is, the problem existing for prior art, provide a kind of integrated wet type flue gas desulphurization system with
Flue gas purifying method, under cryogenic, with low energy consumption, the purified treatment of realizing flue gas safety, and can be
Realize desulphurization and denitration and removal of mercury integration, desulphurization and denitration and removal of mercury process is simple in same system, improve denitration efficiency, real
Show the recycling of sulphur, invention also provides the flue gas purifying method of a kind of integrated wet desulphurization, denitration and the removal of mercury.
For achieving the above object, the technical scheme of present invention offer is：
A kind of integrated wet type flue gas desulphurization system, including pretreating device, low-temperature plasma oxidation unit, washing absorption tower, pair
Product circulation and stress device and chimney；Wherein, described low-temperature plasma oxidation unit is arranged on described pretreating device and washing
On pipeline between absorption tower, and connect with the gas approach of described washing absorption tower；Described washing absorption tower is included from up to
Under the wet cottrell that sets gradually, demister, upper loop spraying layer, pallet, lower loop spraying layer and tower reactor, described tower
The outside setting circulating pump of kettle, and pass through described circulating pumpIt is connected with lower loop spraying layer and demister；Set in described tower reactor
It is equipped with agitator, outside is additionally provided with an air blast；Neat stress outlet and the described chimney of described washing absorption tower pass through pipeline
Connect, and a valve is provided with pipeline.
Preferably, described byproduct circulation and stress device includes crystallizer, centrifuge, dryer, comminutor, material storing box
And transporting equipment；Described crystallizer passes through circulating pumpConnect to described tower reactor bottom；Described centrifuge, dryer, granulation
It is provided with described transporting equipment between machine and material storing box；Described centrifuge side is connected to separation liquid tank by pipeline；Described
Setting circulating pump outside separation liquid tank, and pass through described circulating pumpIt is connected with described tower reactor；
Preferably, on the connecting line between described chimney and described pretreating device and described low temperature plasma oxidation device
It is provided with valve.
Preferably, it is provided with air-introduced machine between described pretreating device and described low temperature plasma oxidation device.
Preferably, described flue gas purification system system further includes loop circulating slot, described upper loop circulating slot with
Described pallet is connected by pipeline；Setting circulating pump outside the circulating slot of described upper loop, and pass through described circulating pumpConnect
To described upper loop spraying layer.
Preferably, described flue gas purification system further includes absorbent supply groove, sets outside described absorbent supply groove
Put circulating pump, and pass through described circulating pumpConnect to described upper loop spraying layer.
Preferably, described flue gas purification system further includes water device for supplying, described water device for supplying pass through pipeline with
Described electrostatic dust collection equipment connects with upper loop circulating slot.
Present invention also offers a kind of flue gas purifying method, comprise the following steps：
The first step：Flue gas carries out preliminary dust removal by filtration in pretreating device；
Second step：Flue gas after preliminary dust removal by filtration delivers to low temperature plasma oxidation device through air-introduced machine, in low-temperature plasma
In body oxidation unit, sulfur dioxide in flue gas, nitrogen oxides and mercury are oxidized to the water soluble acids such as sulfur trioxide, nitrogen dioxide
Gas and mercury oxide solid suspension；
3rd step：Flue gas after oxidation enters described washing absorption tower, sprays desulphurization and denitration and the removal of mercury through buck, by described
Demister dehydrates；
4th step：Flue gas after dehydration enters the further udst separation of described wet cottrell, and the flue gas after purification is through cigarette
Chimney discharges.
Compared with prior art, beneficial effects of the present invention are：
（1）Present system is novel in design, technological process simple optimizing, and energy-conserving and environment-protective are it is achieved that the cigarette of circulating integration
Gas purified treatment, makes desulphurization and denitration and removal of mercury synchronous high-efficiency in same process system flow process carry out, abundant to late-stage products
Recycling not only effectively prevent secondary pollution environment, additionally aids increase income, correspondingly, reduces financial cost.
（2）The innovative design of the present invention, in whole technical process, in addition to the self-contained heat of the flue gas of input, no
Any heat temperature raising link, at low temperature or can complete desulphurization and denitration and the removal of mercury under normal temperature, effectively ensure system
Run safety.
Brief description
Fig. 1 is a kind of schematic diagram of embodiment of a kind of integrated wet type flue gas desulphurization system of the present invention.
Specific embodiment
Below the specific embodiment of the present invention is described in further detail；Following examples are used for the present invention is described,
But it is not limited to the scope of the present invention.
With reference to Fig. 1, the integrated wet type flue gas desulphurization system of the present invention includes pretreating device（1）, low-temperature plasma oxidation
Device（2）, washing absorption tower（3）, byproduct circulation and stress device and chimney（5）.
Low-temperature plasma oxidation unit（2）It is arranged on pretreating device（1）And washing absorption tower（3）Between pipeline on,
And the gas approach with washing absorption tower（31）Connection.
Washing absorption tower is disposed with wet cottrell from top to bottom（32）, demister（33）, upper loop spray
Layer（34）, pallet（35）, lower loop spraying layer（36）And tower reactor（37）；Tower reactor（37）Outside setting one circulating pump（91）, and
By described circulating pump（9）With lower loop spraying layer（36）And demister（33）It is connected；Tower reactor（37）Inside it is provided with agitator
（371）, outside is additionally provided with an air blast（372）；The neat stress outlet of washing absorption tower（38）With chimney（5）By pipeline even
Connect, and a valve is provided with pipeline（11）.
Byproduct circulation and stress device includes crystallizer（41）, centrifuge（42）, dryer（44）, comminutor（45）,
Material storing box（46）And transporting equipment（43）；Crystallizer（41）By circulating pump（92）Connect to tower reactor（37）Bottom；Described
Centrifuge（42）, dryer（44）, comminutor（45）And material storing box（46）Between be provided with described transporting equipment（43）；Described
Centrifuge（42）Side is connected to separation liquid tank by pipeline（47）；Separation liquid tank（47）Outside setting circulating pump（93）, and
By circulating pump（93）With tower reactor（37）It is connected；
Chimney（5）With pretreating device（1）With low temperature plasma oxidation device（2）Between connecting line on be provided with valve
Door（11）.
Pretreating device（1）With low temperature plasma oxidation device（2）Between be provided with air-introduced machine（10）.
Flue gas purification system system further includes loop circulating slot（6）, upper loop circulating slot（6）With pallet（35）Logical
Cross pipeline to connect；Upper loop circulating slot（6）Outside setting one circulating pump（94）, and pass through circulating pump（94）Connect supreme
Loop spraying layer（34）.
Flue gas purification system further includes absorbent supply groove（7）, absorbent supply groove（7）Outside setting circulating pump
（95）, and pass through circulating pump（95）Connect supreme loop spraying layer（34）.
Flue gas purification system further includes water device for supplying（8）, water device for supplying（8）Set with electrostatic precipitation by pipeline
Standby（32）With upper loop circulating slot（6）Connection.
A kind of flue gas purifying method, comprises the following steps：
The first step：Flue gas carries out preliminary dust removal by filtration in pretreating device；
Second step：Flue gas after preliminary dust removal by filtration delivers to low temperature plasma oxidation device through air-introduced machine, in low-temperature plasma
In body oxidation unit, sulfur dioxide in flue gas, nitrogen oxides and mercury are oxidized to the water soluble acids such as sulfur trioxide, nitrogen dioxide
Gas and mercury oxide solid suspension；
3rd step：Flue gas after oxidation enters described washing absorption tower, sprays desulphurization and denitration and the removal of mercury through buck, by described
Demister dehydrates；
4th step：Flue gas after dehydration enters the further udst separation of described wet cottrell, and the flue gas after purification is through cigarette
Chimney discharges.
This embodiment is the basic embodiment of the flue gas purifying method of the present invention, also can make improvements, obtain more
Preferred embodiment.
Claims (8)
1. a kind of integrated wet type flue gas desulphurization system it is characterised in that：Including pretreating device, low-temperature plasma oxidation unit,
Washing absorption tower, byproduct circulation and stress device and chimney；Described low-temperature plasma oxidation unit is arranged on described pre-treatment dress
Put on the pipeline and washing absorption tower between, and connect with the gas approach of described washing absorption tower；Described washing absorption tower bag
Include the wet cottrell setting gradually from top to bottom, demister, upper loop spraying layer, pallet, lower loop spraying layer and tower
Kettle, the outside setting circulating pump of described tower reactor, and pass through described circulating pumpIt is connected with lower loop spraying layer and demister；Described
It is provided with agitator, outside is additionally provided with an air blast in tower reactor；Neat stress outlet and the described chimney of described washing absorption tower
Connected by pipeline, and a valve is provided with pipeline.
2. integrated wet type flue gas desulphurization system according to claim 1 it is characterised in that：Described byproduct circulation and stress dress
Put including crystallizer, centrifuge, dryer, comminutor, material storing box and transporting equipment；Described crystallizer passes through circulating pump
Connect to described tower reactor bottom；Described centrifuge, dryer, it is provided with described transporting equipment between comminutor and material storing box；
Described centrifuge side is connected to separation liquid tank by pipeline；Setting circulating pump outside described separation liquid tank, and by described
Circulating pumpIt is connected with described tower reactor.
3. integrated wet type flue gas desulphurization system according to claim 1 it is characterised in that：Described chimney and described pre-treatment
It is provided with valve on connecting line between device and described low temperature plasma oxidation device.
4. integrated wet type flue gas desulphurization system according to claim 1 it is characterised in that：Described pretreating device with described
It is provided with air-introduced machine between low temperature plasma oxidation device.
5. integrated wet type flue gas desulphurization system according to claim 1 it is characterised in that：Described flue gas purification system enters one
Step includes upper loop circulating slot, and described upper loop circulating slot is connected by pipeline with described pallet；Outside the circulating slot of described upper loop
Portion arranges circulating pump, and pass through described circulating pumpConnect to described upper loop spraying layer.
6. integrated wet type flue gas desulphurization system according to claim 1 it is characterised in that：Described flue gas purification system enters one
Step includes absorbent supply groove, setting circulating pump outside described absorbent supply groove, and pass through described circulating pumpConnect to institute
State loop spraying layer.
7. integrated wet type flue gas desulphurization system according to claim 1 it is characterised in that：Described flue gas purification system enters one
Step includes water device for supplying, and described water device for supplying is connected with described electrostatic dust collection equipment and upper loop circulating slot by pipeline.
8. a kind of flue gas purifying method it is characterised in that：Comprise the following steps：
The first step：Flue gas carries out preliminary dust removal by filtration in pretreating device；
Second step：Flue gas after preliminary dust removal by filtration delivers to low temperature plasma oxidation device through air-introduced machine, in low-temperature plasma
In body oxidation unit, sulfur dioxide in flue gas, nitrogen oxides and mercury are oxidized to the water soluble acids such as sulfur trioxide, nitrogen dioxide
Gas and mercury oxide solid suspension；
3rd step：Flue gas after oxidation enters described washing absorption tower, sprays desulphurization and denitration and the removal of mercury through buck, by described
Demister dehydrates；
4th step：Flue gas after dehydration enters the further udst separation of described wet cottrell, and the flue gas after purification is through cigarette
Chimney discharges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610544719.0A CN106422715A (en) | 2016-07-12 | 2016-07-12 | Integrated wet-process flue gas purifying system and flue gas purifying method |
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| CN201610544719.0A CN106422715A (en) | 2016-07-12 | 2016-07-12 | Integrated wet-process flue gas purifying system and flue gas purifying method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020098574A1 (en) * | 2018-09-08 | 2020-05-22 | 浙江大维高新技术股份有限公司 | Method and apparatus for purifying waste incineration flue gas |
| CN113041803A (en) * | 2019-12-27 | 2021-06-29 | 苏州五蕴明泰科技有限公司 | Method and electronic device for treating exhaust gases in cement manufacturing enterprises |
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| WO2020098574A1 (en) * | 2018-09-08 | 2020-05-22 | 浙江大维高新技术股份有限公司 | Method and apparatus for purifying waste incineration flue gas |
| CN113041803A (en) * | 2019-12-27 | 2021-06-29 | 苏州五蕴明泰科技有限公司 | Method and electronic device for treating exhaust gases in cement manufacturing enterprises |
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Application publication date: 20170222 |