CN209501351U - A kind of chimney photocatalysis mercury removal device - Google Patents
A kind of chimney photocatalysis mercury removal device Download PDFInfo
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- CN209501351U CN209501351U CN201822043848.9U CN201822043848U CN209501351U CN 209501351 U CN209501351 U CN 209501351U CN 201822043848 U CN201822043848 U CN 201822043848U CN 209501351 U CN209501351 U CN 209501351U
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- chimney
- removal device
- mercury removal
- photochemical catalyst
- photocatalysis
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Abstract
The utility model relates to a kind of chimney photocatalysis mercury removal devices, including chimney (1) and air-introduced machine (3), described air-introduced machine (3) one end is connect by air-introduced machine exit passageway (2) with chimney (1) bottom, air-introduced machine (3) other end is connected with electric precipitator export pipeline (6), photochemical catalyst grid (4) are equipped with inside the chimney (1), are provided with the transparent glass (5) for making visible light-transmissive in chimney (1) one side wall.Compared with prior art, the utility model is come into full contact with using visible light and photocatalyst surface, and then light-catalyzed reaction occurs, and photochemical catalyst is made grid-like, further increases catalytic efficiency.The utility model principle is simple, and demercuration efficiency is high, is easy to commercial introduction, improves the environmental protection grade of factory, avoids factory's surrounding enviroment and destroyed by organic pollutant, protect the health of factory's nearby residents.
Description
Technical field
The utility model relates to flue gas demercuration technical fields, and in particular to a kind of chimney photocatalysis mercury removal device.
Background technique
Energy structure in China is mainly based on fossil fuel, and wherein coal resources are one of most important fossil energy again,
The ingredient of coal is extremely complex, in addition to containing elements such as C, H, O, N and S, also containing Hg, As, Se, Pb and Cd etc. to environment and people
The biggish trace element of class health hazard.In the combustion process of coal, Hg is with particle mercury, gaseous state bivalent mercury (Hg2+) and it is single
Matter mercury (Hg0) form be discharged into atmosphere, and can for a long time stop in an atmosphere, cause whole world mercury pollution, Hgp), mercury be ratio
More stable metal, at room temperature not oxidation by air are heated to boiling and just slowly act on forming mercury oxide with oxygen.Mercury is in nature
Boundary exists in the form of mercury metal, inorganic mercury and organic mercury.Dimercurion and sulphion (S2-) there is very strong affinity, once
Hg2+With S2-It meets, is just combined into stable HgS precipitating rapidly.The solid matters pair such as organic matter, clay mineral, metal oxide
Mercury compound has adsorption capacity, and suction-operated is related with solid species and mercury compound form and environmental condition.Divalent
Mercury (Hg2+) soluble easily in water, and easily adsorbed by the particulate matter in flue gas, therefore easily by wet method sulphur removing and dust removing equipment or electrostatic precipitation
Equipment separation.Nonvalent mercury is not soluble in water, and dedusting or desulphurization plant are difficult to capture, and almost all is discharged into the atmosphere.Long ago
The mankind just recognize that mercury is a kind of noxious material, and nineteen ninety, in the air cleaner bill (CAAA) of U.S.'s publication, mercury is to come
Primary toxic metals substance, 1992, Basel Convention provided any mercurous or mercury compound and its contaminated object
Matter is accordingly to be regarded as poisonous and harmful substance, and mercury is slower to the pollution effect of ecological environment, but its duration of pollution is longer, to the mankind
It causes to seriously threaten with ecological environment.
Flue gas takes off method for removing hydrargyrum mainly include the following types: demercuration before burning, demercuration after demercuration, burning in burning.At present also
Without it is a kind of efficiently using removing means carry out demercuration, in addition, the research of existing new adsorbent is also few, and there is
Carry out source problem.Activated carbon application is most extensive, but it applies at high cost in power plant's demercuration, does not carry out widely in power plant at present
It promotes.
In conclusion in order to reach the requirement of coal-fired flue-gas discharge standard, the smoke pollution of research and development efficiently, inexpensive
Object removing sulfuldioxide seems particularly necessary.
Patent CN107694334A discloses photocatalysis mercury removal device in a kind of chimney, is mounted on inside chimney, for taking off
Except the mercury in flue gas, including shell, set on the photocatalysis demercuration unit and UV lamp unit of interior of shell, photocatalysis demercuration unit
It is made of multiple sheet metals, sheet metal is radially arranged inside the housing centered on the central axes of shell, metal foil
Plate surface load has the nanocatalyst with photocatalysis and adsorption dual function, when the flue gas in chimney passes through sheet metal,
It is contacted with nanocatalyst, by catalysis oxidation, absorption.But the utility model device includes ultraviolet source, lacks transparent glass,
Photocatalysis demercuration can not be carried out using visible light, and heavy metal Hg is removed insufficient.
Utility model content
The purpose of this utility model is exactly to solve the above-mentioned problems and provides a kind of chimney photocatalysis mercury removal device, the dress
It sets and oxidation removal is carried out to the nonvalent mercury in flue gas using visible light, existing power-plant flue gas control device can be made up to heavy metal
The deficiency of mercury removal, and can ultraviolet source etc. be installed, demercuration efficiency is further increased according to the actual situation.
The purpose of this utility model is achieved through the following technical solutions:
A kind of chimney photocatalysis mercury removal device, including chimney and air-introduced machine, described air-introduced machine one end are exported by air-introduced machine
Channel is connect with chimney bottom, and the air-introduced machine other end is connected with electric precipitator export pipeline, and photocatalysis is equipped with inside the chimney
Agent grid is provided with the transparent glass for making visible light-transmissive in the chimney one side wall.
Further, the transparent glass is borate glass, translucent effect more preferably, conducive to photocatalysis demercuration into
Row, and ensure the safety of chimney side setting glass.
Further, the chimney is coated with Noctilucent material painting in the other side inner wall surface opposite with the transparent glass
Layer, at the night that visible light light intensity reduces or visible light is faint, Noctilucent material coating, which shines, is catalyzed photochemical catalyst demercuration.
Further, the Noctilucent material coating is high temperature resistant long acting Noctilucent material, and operating temperature is up to 1080 DEG C,
Long-acting illuminating 8~12 hours.
Further, the transparent glass is arranged in from top to bottom on chimney wall.
Further, the photochemical catalyst grid divides multilayer to be arranged inside chimney from the bottom up.
Further, the photochemical catalyst grid is honeycomb type, and the distribution area of photochemical catalyst is bigger, is conducive to improve
Catalytic efficiency.Photochemical catalyst grid with a thickness of 1.5-2.5m, the regular hexagon side length of honeycomb is 25-35cm, further preferably,
Photochemical catalyst grid with a thickness of 2m, the regular hexagon side length of honeycomb is 30cm, the distance between photochemical catalyst grid layer and layer
Impartial distribution is substantially come with the height of chimney, in 30-50m.
Further, negative photocatalyst-bearing on the photochemical catalyst grid.
Further, the photochemical catalyst is bismuth-based catalysts.
The photochemical catalyst that the utility model selects is bismuth-based catalysts, specific reaction mechanism are as follows: when radiation of visible light is catalyzed
Agent, acid iodide oxygen bismuth catalyst surface generates photo-generate electron-hole separation, as light induced electron is by Bi3 +It captures, due to pole gesture electric field
Effect, hole will migrate into IO3 -.Just because of the presence of Lacking oxygen, light induced electron and hole will not be compound, this is extended
The disengaging time of photo-generate electron-hole, allows light induced electron to have time enough to react with surface active molecules.Reaction side
Formula is as follows:
BiOIO3+hv→BiOIO3+h++e–
H2O→H++H-
OH-+h+→·OH
2·OH+Hg0→HgO+H2O
O2+4H++4e-→2H2O
Traditional power-plant flue gas control equipment cannot effectively remove heavy metal Hg, compared with existing fume control system,
The utility model comes into full contact with visible light with photocatalyst surface, and when illumination is strong, visible light is irradiated to photocatalysis by glass
Agent surface, and then light-catalyzed reaction occurs, it is coated with Noctilucent material on the wall surface on the inside of chimney with transmitting light from side surface glass phase pair,
The night that visible light light intensity reduces or visible light is faint can also carry out photocatalysis demercuration reaction.Simultaneously because being provided with uniformly coating
The photochemical catalyst grid of photochemical catalyst, further increase catalytic efficiency.The utility model principle is simple, demercuration efficiency
Height is easy to commercial introduction, improves the environmental protection grade of factory, avoids factory's surrounding enviroment and is destroyed by organic pollutant, protection
The healths of factory's nearby residents.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of chimney photocatalysis mercury removal device；
Fig. 2 is round honeycomb type raster plane schematic diagram；
In figure: 1- chimney；2- air-introduced machine exit passageway；3- air-introduced machine；4- photochemical catalyst grid；5- transparent glass；6- electricity
House outlet pipeline；7- Noctilucent material coating.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
Embodiment
A kind of chimney photocatalysis mercury removal device, as shown in Figure 1, including chimney 1,3 one end of air-introduced machine is exported by air-introduced machine
Channel 2 is connect with 1 bottom of chimney, and 3 other end of air-introduced machine is connected with electric precipitator export pipeline 6, and photochemical catalyst grid 4 is set to
Inside chimney 1, the side of chimney 1 is provided with transparent glass 5, the other side inner wall surface of chimney 1 is coated with Noctilucent material coating
7, as Shenzhen credit Dexing Science and Technology Ltd. produce long-acting noctilucent powder, operating temperature up to 1080 DEG C, can long-acting illuminating 8~
12 hours, and can recycle, at the night that visible light light intensity reduces or visible light is faint, the luminous catalysis light of Noctilucent material is urged
Agent demercuration.Photochemical catalyst is uniformly coated by photochemical catalyst grid 4, and photochemical catalyst cell structure is as shown in Fig. 2, be bee
Nido thickness is about 2 meters, honey comb like regular hexagon side length is 30 centimetres, and distance between layers is substantially with the height of chimney
It spends and carrys out impartial distribution, by taking height is 180 meters of chimney as an example, flue gas is then spaced since top from the inflow of 20 meters or so of bottom
40 meter amperes fill a honeycomb type photochemical catalyst grid, install 3 altogether.The distribution area of photochemical catalyst is bigger, is conducive to improve and urge
Change efficiency.Flue gas leads to concatenated electric precipitator outlet, under the action of air-introduced machine, enters chimney by air-introduced machine outlet, in cigarette
Circular gratings in chimney at the uniform velocity by being coated with photochemical catalyst, it is seen that light is irradiated to the surface of photochemical catalyst by the glass of light transmission
It is reacted with the nonvalent mercury in flue gas.
Further, the glass of chimney side setting is transparent borate glass, first is that ensuring translucency, two are to ensure that
The safety of chimney side setting glass.
Further, three pieces of transparent glass are arranged in uniform intervals on chimney, and photochemical catalyst grid is respectively provided with below glass,
The nonvalent mercury in flue gas is promoted more fully to react with photochemical catalyst.
It can understand the above description of the embodiments is intended to facilitate those skilled in the art and use practical
It is novel.Person skilled in the art obviously easily can make various modifications to these embodiments, and illustrating herein
General Principle be applied in other embodiments without having to go through creative labor.Therefore, the utility model is not limited to above-mentioned
Embodiment, those skilled in the art's announcement according to the present utility model, do not depart from improvement that the utility model scope is made and
Modification should be all within the protection scope of the utility model.
Claims (10)
1. a kind of chimney photocatalysis mercury removal device, including chimney (1) and air-introduced machine (3), described air-introduced machine (3) one end passes through air inducing
Machine exit passageway (2) is connect with chimney (1) bottom, and air-introduced machine (3) other end is connected with electric precipitator export pipeline (6), described
Photochemical catalyst grid (4) are equipped with inside chimney (1), which is characterized in that being provided in chimney (1) one side wall keeps visible light saturating
The transparent glass (5) crossed.
2. a kind of chimney photocatalysis mercury removal device according to claim 1, which is characterized in that the transparent glass (5)
For borate glass.
3. a kind of chimney photocatalysis mercury removal device according to claim 1, which is characterized in that the chimney (1) with institute
It states and is coated with Noctilucent material coating (7) in the opposite other side inner wall surface of transparent glass (5).
4. a kind of chimney photocatalysis mercury removal device according to claim 3, which is characterized in that the Noctilucent material coating
It (7) is high temperature resistant long acting Noctilucent material.
5. a kind of chimney photocatalysis mercury removal device according to claim 1, which is characterized in that the transparent glass (5)
It is arranged on chimney (1) wall from top to bottom.
6. a kind of chimney photocatalysis mercury removal device according to claim 1, which is characterized in that the photochemical catalyst grid
(4) divide multilayer setting internal in chimney (1) from the bottom up.
7. a kind of chimney photocatalysis mercury removal device according to claim 6, which is characterized in that the photochemical catalyst grid
(4) be honeycomb type, photochemical catalyst grid (4) with a thickness of 1.5-2.5m, the regular hexagon side length of honeycomb is 25-35cm.
8. a kind of chimney photocatalysis mercury removal device according to claim 7, which is characterized in that the photochemical catalyst grid
(4) distance between layers is 30-50m.
9. a kind of chimney photocatalysis mercury removal device according to claim 7, which is characterized in that the photochemical catalyst grid
(4) negative photocatalyst-bearing on.
10. a kind of chimney photocatalysis mercury removal device according to claim 9, which is characterized in that the photochemical catalyst is bismuth
Base catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822043848.9U CN209501351U (en) | 2018-12-06 | 2018-12-06 | A kind of chimney photocatalysis mercury removal device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822043848.9U CN209501351U (en) | 2018-12-06 | 2018-12-06 | A kind of chimney photocatalysis mercury removal device |
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| CN209501351U true CN209501351U (en) | 2019-10-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109529606A (en) * | 2018-12-06 | 2019-03-29 | 上海电力学院 | A kind of chimney photocatalysis mercury removal device |
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2018
- 2018-12-06 CN CN201822043848.9U patent/CN209501351U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109529606A (en) * | 2018-12-06 | 2019-03-29 | 上海电力学院 | A kind of chimney photocatalysis mercury removal device |
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