CN109999652A - Boiler fired coal flue gas purification device - Google Patents
Boiler fired coal flue gas purification device Download PDFInfo
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- CN109999652A CN109999652A CN201910276411.6A CN201910276411A CN109999652A CN 109999652 A CN109999652 A CN 109999652A CN 201910276411 A CN201910276411 A CN 201910276411A CN 109999652 A CN109999652 A CN 109999652A
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- light
- catalyzed reaction
- reaction case
- flue gas
- tio
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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
- B01D53/86—Catalytic processes
- B01D53/8665—Removing heavy metals or compounds thereof, e.g. mercury
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20707—Titanium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20738—Iron
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
-
- 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)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (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)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The present invention relates to a kind of boiler fired coal flue gas purification devices, with at least one electrostatic precipitator, at least one light-catalyzed reaction case, the electrostatic precipitator lower part connects light-catalyzed reaction case by connecting pipe, the light-catalyzed reaction case is placed in shell, LED lamp tube is placed in the left and right sides in light-catalyzed reaction case in shell, and load is posted in front and rear sides Fe-TiO2The square metal net of catalyst；Present invention is generally directed to coal fired boiler of power plant, the heavy metal in flue gas being discharged is difficult to the problem of removing, and when external environment illumination abundance, light source is entered in pipeline by tempered glass piece, the Fe-TiO in light-catalyzed reaction case2The hole and vapor generated through excited by visible light react generation hydroxyl radical free radical by gaseous elemental heavy metal oxidation, and be adsorbed on TiO2Surface, (such as rainy days, night etc.) replaces external environmental light by the LED lamp tube in light-catalyzed reaction case when external environment illumination is inadequate.
Description
Technical field
The present invention relates to a kind of coal steam-electric plant smoke purification techniques, specially a kind of boiler fired coal flue gas processing device.
Background technique
Industrial waste gas pollution be at this stage by for an emphasis outstanding, in the epoch of this rapid industrial development, we
All always by the compressing of exhaust gas.Wherein, the maximum a part of industrial waste gas accounting is exactly Thermal Power Generation Industry, steam turbine in industry
Mainly using as fuel.A large amount of flue dust is generated after burning, sulphur, nitrogen oxide and heavy metal component, these are harmful
Gas is discharged into atmosphere, seriously polluted the atmospheric environment of surrounding, and especially thermal power plant has focused largely on city and suburban area, again
Belong to low-altitude discharged, if be not controlled, great threat can all be constituted to people's lives and human health.
The smoke pollution of coal-burning boiler is primarily referred to as sulphur, nitrogen oxide and heavy metal component and a large amount of dust, wherein
Gas includes: carbon monoxide, carbon dioxide, oxynitrides, oxygen sulfur compound, volatile organic matter etc..Solid particle class
It include: carbon black, macromolecule organic, heavy metal etc..
Often since oxygen supply is insufficient or the factors such as unreasonable of chamber structure design generate flue dust when fuel combustion,
There are about 100,000,000 tons of flue gases to be discharged into air every year in the whole world.Wherein toxic metals and carcinogen, the harm to human body containing there are many
It is very big.
Since flue-gas temperature is excessively high, and flow velocity is fast, what to traditional purified treatment, to have caused very big difficult and certain
Limitation, common purification device can remove sulphur removal, nitrogen oxide and part dust substantially, but some heavy metals are but
It is difficult to remove, such as mercury metal etc., the Technical comparing of separating beavy metal is few in power plant at present.
Summary of the invention
The purpose of the present invention is to solve the above-mentioned problems, and provides a kind of boiler fired coal flue gas purification device.
The purpose of the present invention is achieved through the following technical solutions:
A kind of boiler fired coal flue gas purification device, have at least one electrostatic precipitator, at least one light-catalyzed reaction case,
The electrostatic precipitator lower part connects light-catalyzed reaction case by connecting pipe, and the light-catalyzed reaction case is placed in shell, outside
LED lamp tube is placed in the left and right sides in light-catalyzed reaction case in shell, and load is posted in front and rear sides Fe-TiO2The square of catalyst
Metal mesh；The electrostatic precipitator is made of corona electrode, adsorption electrode, ash bucket, and the corona electrode is separately positioned on electrostatic
On shell of dust remover bosom and wall, adsorption electrode is arranged in corona electrode top, electrostatic precipitator shell lower end air inlet
Connecting pipe is connected, two sides connect ash bucket, and fan is housed between the corona electrode and adsorption electrode, and fan can will be attached to
Particulate matter on corona electrode and adsorption electrode dispels, and falls in the ash bucket of lower part.
Further, it is with holes on the duct wall outside the light-catalyzed reaction case, size complete phase is installed in aperture
The tempered glass piece of same light-permeable, tempered glass edge and duct wall are tightly connected.
Further, the length of the LED lamp tube is the 2/3 of light-catalyzed reaction case, and outside is provided with glass protecting cover.
Further, the power of the LED lamp tube is less than 35w.
Further, the shell is the cylinder of half hollow out shape, sufficiently catalytic convenient for the entrance of visible light and environment light
It is supported on the online catalyst of square metal.
Further, the boiler fired coal flue gas purification device is connect by industrial connector (6) with external pipe.
Further, for the boiler fired coal flue gas purification device in extraneous ambient lighting abundance, it is anti-that light source enters photocatalysis
After answering in the pipeline of case, the Fe-TiO in light-catalyzed reaction case2The hole generated through excited by visible light reacts with vapor
Gaseous elemental heavy metal oxidation is adsorbed on TiO by the hydroxyl radical free radical of generation2Surface；When external environment illumination is inadequate,
External environmental light is replaced by the LED lamp tube in light-catalyzed reaction case, and then is attracted to TiO2Particle surface, another small part gaseous state
Mercury is directly oxidized to bivalent mercury by LED lamp tube, and generates mercury oxide with oxygen, equally by TiO2Absorption.
The beneficial effects of the present invention are:
Present invention is generally directed to coal fired boiler of power plant, the heavy metal in flue gas being discharged is difficult to the problem of removing, extraneous
When ambient lighting abundance, light source is entered in pipeline by tempered glass piece, the Fe-TiO in light-catalyzed reaction case2Swash through visible light
Send out the hole generated and vapor react generation hydroxyl radical free radical by gaseous elemental heavy metal oxidation, and be adsorbed on TiO2
Surface, (such as rainy days, night etc.) replaces extraneous ring by the LED lamp tube in light-catalyzed reaction case when external environment illumination is inadequate
Border light.Electrostatic precipitator is by remaining loose dust collection in ash bucket.It is easy to operate, install convenient, the powder in ash bucket
Dirt is easy cleaning.
Fe-TiO2As photochemical catalyst, it is had several advantages that
1. degradation speed is fast, the OH that light excites hole to generate is strong oxidative free radical, can in a relatively short period of time at
Most of organic matters of the decomposition of function including hardly degraded organic substance.
2. non-selectivity of degrading, can almost degrade any organic pollutant.
3. range of degrading is wide.
4. reaction condition is mild, small investment, low energy consumption, and light can be occurred and urge by being irradiated or being exposed under sunlight with LED light
Change chemical reaction.
5. consersion unit is simple, easily operated control.Light-catalyzed reaction has stability, under normal circumstances, loads Fe-
TiO2Photochemical catalyst can be used for multiple times, and not influence reaction effect, and catalytic action is persistently long-acting.
The advantages of present invention is by changing structural pipe wall and using tempered glass is as follows:
1. external environmental light can be entered in pipeline by tempered glass, directly and Fe-TiO2Effect
2. intensity improves several times, bending resistance compared with simple glass.
3. at low cost compared to other translucent material smooth glass pieces, effect is good.
Detailed description of the invention
Fig. 1 is boiler fired coal flue gas purification device structure sectional view of the invention
Fig. 2 is shell mechanism schematic diagram；
Fig. 3 is in Fig. 1 along A-A cross-sectional view；
In figure: 1- air inlet, 2-LED fluorescent tube, 3- shell, 4- ash bucket, 5- connecting pipe, 6- industrial connector, 7- corona
Electrode A, 8- corona electrode B, 9- fan blade, 10 adsorption electrodes, the gas outlet 11-, 13-Fe-TiO2Square metal net.
Specific embodiment
Below with reference to picture, the present invention is described in detail with specific embodiment, it is clear that described embodiment is only this
A part of the embodiment of invention, instead of all the embodiments.Based on the embodiment of the present invention, creative work is not being made
Under the premise of other all embodiments obtained, belong to the scope of protection of the invention.
As shown in Fig. 1 to Fig. 3, a kind of boiler fired coal flue gas purification device, including purification shell, shell 3, LED lamp tube 2,
Ash bucket 4, connecting pipe 5, industrial connector 6, corona electrode A, B7,8, fan blade 9, adsorption electrode 10 etc..
It purifies enclosure interior and electrostatic precipitator is housed, and electrostatic precipitator is located above light-catalyzed reaction case.Electrostatic precipitation
Device is by corona electrode A, B7, and 8, adsorption electrode 10, ash bucket 4 forms, and corona electrode A, B7,8 are separately positioned on light-catalyzed reaction case
On bosom and wall, the setting of adsorption electrode 10 purifies shell lower end air inlet 1 and passes through connecting pipe on the top corona electrode B8
5 connected with outer casing 3 and light-catalyzed reaction case, two sides connect ash bucket 4, and purification shell upper end is equipped with gas outlet 11.Fan 9 is mounted on electricity
Dizzy 8 top of electrode B, the particulate matter being attached on corona electrode B8 and adsorption electrode 10 can be dispelled, fall to lower part ash bucket 4
In, it greatly improves the efficiency of air cleaning and carries out the period of internal cleaning.Outside passes through industrial connector (6) and practical pipe
Road installation.
Such as Fig. 1, shown in 3, shell 3 is provided with light-catalyzed reaction case, and load has Fe-TiO2Square metal net 12, light
It is catalyzed in reaction chamber and LED lamp tube 2 is housed.
Be with holes on the duct wall outside light-catalyzed reaction case, spacing according to the specific size of light-catalyzed reaction case and
It is fixed, the tempered glass piece of the identical light-permeable of size is installed, tempered glass piece edge has reached with duct wall in aperture
Hermetically sealed state.The product that the present invention is developed is mainly for the heavy metal substance in fire coal boiler fume, such as gaseous mercury hardly possible
The problem of to remove, pollute environment.In the light-catalyzed reaction case in shell 3, LED lamp tube, front and rear sides are placed in the left and right sides
Post load Fe-TiO2Square metal net 12.When external environment illumination abundance, light source enters photocatalysis by tempered glass piece
Fe-TiO in the pipeline of reaction chamber, in light-catalyzed reaction case2The hole generated through excited by visible light reacts with vapor
Gaseous elemental heavy metal oxidation is adsorbed on TiO by the hydroxyl radical free radical of generation2Surface, when external environment illumination is inadequate (such as
Rainy days, night etc.) by the LED lamp tube in light-catalyzed reaction case replace external environmental light.And then it is attracted to TiO2Particle table
Face (concrete principle is explained later), another small part gaseous mercury is directly oxidized to bivalent mercury by LED light, and generates and aoxidize with oxygen
Mercury, equally by TiO2Absorption.Remaining loose dust collection in ash bucket, is prevented toxic gas from arranging by electrostatic precipitator
Out.
Illustrate: including that four LED lamp tubes are placed in tempered glass protective cover in light-catalyzed reaction case, prevent by
High-temperature flue gas corrodes, and wall loading has Fe-TiO in shell 32Square metal net 12, maximize reaction surface area, increase reaction
Efficiency, tobacco pipe are placed in outside connecting pipe, are easily installed and are dismantled, more easy to clean.
Tempered glass protective cover specific size, size, spacing is depending on the size of practical pipeline, and uniform discharge is in shell
On 3 walls, edge and shell 3 reach the state being fully sealed.
Electrostatic precipitator lower part is equipped with ash bucket, for collecting by the adsorbed particulate matter of electrostatic equipment.It is equipped in tobacco pipe
For measuring the device of internal capacity, dust is placed excessively by line clogging.The shelling machine of light-catalyzed reaction case is at half hollow out
Shape facilitates environment light is sufficiently catalytic to be supported on the online catalyst of square metal.Since the flue gas of coal-burning boiler discharge is height
Warm flue gas, all material should be heat-resisting material.To adapt to thermal power plant's exhaust structure, shell is set as cylindric, and surrounding is all provided with
There is industrial connector, connect with wall surface, and do not use and be fully sealed between light-catalyzed reaction case and dust-extraction unit, facilitates installation
With disassembly.
Photochemical catalyst major function in light-catalyzed reaction case is to provide reacting environment and generates active material, to aoxidize cigarette
Pollutant in gas, achievees the purpose that purifying smoke.
TiO2+hv→h++e- (1)
h++OH-→·OH (2)
h++H2O→·OH+H+ (3)
e-+O2→·O2 - (4)
H2O+·O2 -→HO2·+OH- (5)
2HO2·+e-+H2O→H2O2+OH- (6)
H2O2+e-→·OH+OH (7)
H2O2+·O2 -→·OH+H+ (8)
The specific working principle is as follows: coal-fired boiler smoke purifying device is placed directly in exhaust pipe, even by industry
It connects device 6 to be connected with external pipe inner wall, flue gas is followed by light-catalyzed reaction case 2, connecting pipe 5, electrostatic precipitator 7.Cigarette
When gas passes through light-catalyzed reaction case, Fe-TiO2The hole and vapor generated through excited by visible light reacts the hydroxyl of generation
Free radical is by gaseous elemental heavy metal oxidation.Heavy metallic oxide is attracted to Fe-TiO in turn2Particle surface, it is another some
Simple substance heavy metal directly aoxidizes after irradiation, is converted into the oxide easily removed.And visible light passes through cigarette by outside
Tempered glass piece in feed channel injects photocatalysis reaction chamber, in external light source deficiency, generates visible light by LED lamp tube,
The consumption of the energy is greatly reduced, while also solving in pipeline the problems such as without visible light, the flue gas after catalysis passes through connecting tube
Road 5 enters in electrostatic precipitator, and the harmful substance of suction-operated does not occur but by catalytic action by Electrostatic Absorption, is deposited in
In lower section ash bucket 4, flue gas is further processed, finally the flue gas Jing Guo purified treatment is discharged into air by gas outlet 11.
Claims (7)
1. a kind of boiler fired coal flue gas purification device, there is at least one electrostatic precipitator, at least one light-catalyzed reaction case,
Be characterized in that: the electrostatic precipitator lower part connects light-catalyzed reaction case by connecting pipe, and the light-catalyzed reaction case is placed in
In shell, LED lamp tube is placed in the left and right sides in the light-catalyzed reaction case in shell, and load is posted in front and rear sides Fe-TiO2It urges
The square metal net of agent；The electrostatic precipitator is made of corona electrode, adsorption electrode, ash bucket, the corona electrode difference
Among electrostatic precipitator enclosure interior and on wall, adsorption electrode is arranged in corona electrode top, electrostatic precipitator shell for setting
Lower end air inlet connects connecting pipe, and two sides connect ash bucket, fan is housed, fan can between the corona electrode and adsorption electrode
To dispel the particulate matter being attached on corona electrode and adsorption electrode, and fall in the ash bucket of lower part.
2. boiler fired coal flue gas purification device according to claim 1, it is characterised in that: outside the light-catalyzed reaction case
Duct wall on be with holes, the tempered glass piece of the identical light-permeable of size, tempered glass edge are installed in aperture
It is tightly connected with duct wall.
3. boiler fired coal flue gas purification device according to claim 1, it is characterised in that: the length of the LED lamp tube is
The 2/3 of light-catalyzed reaction case, outside are provided with glass protecting cover.
4. boiler fired coal flue gas purification device according to claim 1, it is characterised in that: the power of the LED lamp tube is small
In 35w.
5. boiler fired coal flue gas purification device according to claim 1, it is characterised in that: the shell is half hollow out shape
Cylinder, convenient for visible light entrance and environment light is sufficiently catalytic is supported on the online catalyst of square metal.
6. boiler fired coal flue gas purification device according to claim 1, it is characterised in that: the boiler fired coal gas cleaning
Device is connect by industrial connector (6) with external pipe.
7. -6 any boiler fired coal flue gas purification device according to claim 1, it is characterised in that: the boiler fired coal cigarette
Air purifying apparatus is in extraneous ambient lighting abundance, after light source enters in the pipeline of light-catalyzed reaction case, in light-catalyzed reaction case
Fe-TiO2Through excited by visible light generate hole and vapor react generation hydroxyl radical free radical by gaseous elemental a huge sum of money
Belong to oxidation, and is adsorbed on TiO2Surface；When external environment illumination is inadequate, replaced by the LED lamp tube in light-catalyzed reaction case
External environmental light, and then it is attracted to TiO2Particle surface, another small part gaseous mercury are directly oxidized to bivalent mercury by LED lamp tube,
And mercury oxide is generated with oxygen, equally by TiO2Absorption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910276411.6A CN109999652A (en) | 2019-04-08 | 2019-04-08 | Boiler fired coal flue gas purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910276411.6A CN109999652A (en) | 2019-04-08 | 2019-04-08 | Boiler fired coal flue gas purification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109999652A true CN109999652A (en) | 2019-07-12 |
Family
ID=67170262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910276411.6A Pending CN109999652A (en) | 2019-04-08 | 2019-04-08 | Boiler fired coal flue gas purification device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109999652A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101314149A (en) * | 2007-05-31 | 2008-12-03 | 孙作达 | Combined indoor environment air purifier of papery adsorption electrodes |
| CN103007745A (en) * | 2012-12-18 | 2013-04-03 | 武汉大学 | Electro-catalytic on-line flue gas conditioning system and method |
| CN109013058A (en) * | 2018-09-27 | 2018-12-18 | 上海电力学院 | A kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device |
-
2019
- 2019-04-08 CN CN201910276411.6A patent/CN109999652A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101314149A (en) * | 2007-05-31 | 2008-12-03 | 孙作达 | Combined indoor environment air purifier of papery adsorption electrodes |
| CN103007745A (en) * | 2012-12-18 | 2013-04-03 | 武汉大学 | Electro-catalytic on-line flue gas conditioning system and method |
| CN109013058A (en) * | 2018-09-27 | 2018-12-18 | 上海电力学院 | A kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device |
Non-Patent Citations (2)
| Title |
|---|
| 代学伟等: "Fe 掺杂TiO2催化剂制备及其光催化脱汞机理", 《环境科学研究》 * |
| 龚金科主编: "《热动力设备排放污染及控制》", 31 July 2007, 中国电力出版社 * |
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Application publication date: 20190712 |