CN205850577U - The removing system of Hg2+ in a kind of flue gas - Google Patents
The removing system of Hg2+ in a kind of flue gas Download PDFInfo
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- CN205850577U CN205850577U CN201620839775.2U CN201620839775U CN205850577U CN 205850577 U CN205850577 U CN 205850577U CN 201620839775 U CN201620839775 U CN 201620839775U CN 205850577 U CN205850577 U CN 205850577U
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- slurry
- flue gas
- petrolenum sulfoxide
- oil water
- sulfoxide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
Hg in this utility model one flue gas2+Removing system, removing Hg2+The recycling of hydrargyrum resource it is capable of while pollution.It includes wet desulfurization system and petrolenum sulfoxide piece-rate system；Wet desulfurization system includes wet desulfuration tower, the slurry pool that wet desulfuration tower is internally formed, connect the oxidation smoke inlet of flue, the tank used for storing ammonia and petrolenum sulfoxide stock solution storage tank arranged is connected with slurry pool, it is arranged on the spraying layer above oxidation smoke inlet, and connects spraying layer and the slurry circulating pump of slurry pool；Petrolenum sulfoxide piece-rate system includes that primary oil water separator, the input of primary oil water separator connect with slurry pool, and the output of oil phase outfan is containing Hg2+Petrolenum sulfoxide, aqueous phase outfan output reclaim desulfurization slurry, its aqueous phase outfan connect spraying layer.By adding in desulfurization slurry by water-fast petrolenum sulfoxide, blended spray is with by the Hg in flue gas2+Trap in petrolenum sulfoxide, it is achieved to Hg in flue gas2+Removing.
Description
Technical field
This utility model relates to environmental technology field, is specially Hg in a kind of flue gas2+Removing system.
Background technology
Hydrargyrum is a kind of poisonous heavy metal element, is also one of important atmosphere pollution.According to statistics, in atmospheric environment about
The hydrargyrum of 31% comes from the coal combustion of thermal power plant, and it is designed into the industries such as electric power, Industrial Boiler, Ferrous Metallurgy, coal-fired mercury pollution
Have become as the another severe environments problem that the world today generally acknowledges.To this end, Environmental Protection Department and State General Administration for Quality Supervision were in 2012 1
Within 1st, combine issue " fossil-fuel power plant atmospheric pollutant emission standard " moon, first the discharge value of hydrargyrum in China's power-plant flue gas is limited
At 0.03mg/m3, the research determining flue gas demercuration technology in national policy regulation aspect will have important social economy's valency
Value.
Mercury In Coal Combustion Flue Gas is mainly with element mercury (Hg0), mercury oxide (Hg2+) and particulate Hg (Hgp) three kinds of forms exist.Hg2 +And HgpBecause of himself physicochemical properties, easily remove in wet desulphurization and dust arrester.But, Hg0Volatile and be insoluble in
Water, it is difficult to removing in conventional flue gas purifying equipment, almost all is discharged in air, greatly endangers health.Root
" the Mercury delivered in 10:1183-1192 in 2010 according to Atmospheric Chemistry and Physics
Emission and speciation of coal-fired power plants in China ", Fuel delivered in 2008
Document " The role of flue gas desulphurisation in mercury speciation and
Distribution in a lignite burning power plant ", and environmental project journal was at 2008 1 (2):
Content in " the demercuration research simultaneously of wet flue gas desulfurization system " disclosed in 64-69 shows: in wet desulphurization device, Hg2+
Removal efficiency close to 100%.But, owing to having the ion of reproducibility in desulfurization slurry containing many, Fuel magazine is in 2010
Article " the Removal of Hg delivered in year 89:3167-31770from flue gases in wet FGD by
Catalytic oxidation with air-An experimental study " show, the Hg being dissolved in serosity2+Can quilt
Gradually it is reduced into Hg0, cause by Hg in flue gas after desulfurization slurry0Concentration is higher than air inlet on the contrary.As Wang Yue army is open in 2011
Zhejiang University Ph.D. Dissertation " gas phase nonvalent mercury catalysis oxidation and bivalent mercury liquid phase scrubbing, reduction process research " middle finger
Go out: when absorption liquid pH is between 4.5～5.5, calcio system has the Hg of nearly 70%2+It is reduced.To this end, Fuel magazine in
Article " the Mercury removal from coal combustion by Fenton delivered in 86:2789-2797 for 2007
Reactions-Part A:Bench-scale tests " open interpolation Fenton reagent (Fe in desulfurization slurry3+/H2O2)、
Journal of Hazardous Materials magazine is at report " the The role of of 183:132-137 in 2010
Iodine monochloride for the oxidation of elemental mercury ") disclosed in interpolation chlorination
Iodine and Fuel are at report " the Effect of adding aluminum salts to wet FGD of 96:568-571 in 2012
Systems upon the stabilization of mercury " " disclosed in interpolation aluminium salt etc. to suppress Hg2+Reduction,
And achieve certain effect.Although this method has certain application prospect, but need to add oxygen when using this method in desulfurization slurry
The amount of agent and catalyst is relatively big, can affect the composition of slurry to a great extent, and then affect desulfurized effect.Additionally, add
The addition of agent will reduce gypsum qualitt.Additionally, after the hydrargyrum in fire coal boiler fume is directly carried out removing process, do not returned
Receiving also is the waste to hydrargyrum resource.
Utility model content
For problems of the prior art, this utility model provides Hg in a kind of flue gas2+Removing system, use letter
Single, convenience and high-efficiency, at removing Hg2+The recycling of hydrargyrum resource it is capable of while pollution.
This utility model is to be achieved through the following technical solutions:
Hg in a kind of flue gas2+Removing system, including wet desulfurization system and petrolenum sulfoxide piece-rate system；
Described wet desulfurization system includes the slurry pool that wet desulfuration tower, wet desulfuration tower are internally formed, and connects flue
Oxidation smoke inlet, connect with slurry pool arrange tank used for storing ammonia and petrolenum sulfoxide stock solution storage tank, be arranged on oxidation flue gas enter
Spraying layer above Kou, and connect spraying layer and the slurry circulating pump of slurry pool；
Described petrolenum sulfoxide piece-rate system includes primary oil water separator, the input of primary oil water separator and serosity
Pond connects, and the output of oil phase outfan is containing Hg2+Petrolenum sulfoxide, aqueous phase outfan output reclaim desulfurization slurry, its aqueous phase outfan
Connect spraying layer.
Preferably, also include that petrolenum sulfoxide regenerative system, described petrolenum sulfoxide regenerative system include two grades of oil-water separation
Device and the hydrochloric acid tank being connected on two grades of oil water separators；The input of two grades of oil water separators and primary oil water separator
Oil phase outfan connects, oil phase outfan output regeneration petrolenum sulfoxide, aqueous phase outfan output Hg2+Resolving hydrochloric acid liquid, its oil
Phase output terminal connects spraying layer.
Further, the Hg being connected to two grades of oil water separator aqueous phase outfans is also included2+Electrolysis unit, Hg2+Electrolysis unit
For by Hg2+Resolving hydrochloric acid liquid carry out electrolysis process obtain hydrargyrum, Hg2+Connect on electrolysis unit and have for storing hydrargyrum
Liquid pure hydrargyrum collection device.
Further, the aqueous phase outfan of primary oil water separator and the oil phase outfan of two grades of oil water separators connect respectively
It is connected on the outlet side of slurry circulating pump.
Preferably, slurry pool is provided with stirring system.
Preferably, in wet desulfuration tower, spraying layer has been sequentially arranged above except mist layer and exhanst gas outlet.
Compared with prior art, this utility model has a following useful technique effect:
Water-fast petrolenum sulfoxide is added in desulfurization slurry by this utility model, by mixing spray with by flue gas
Hg2+Trap in petrolenum sulfoxide, it is achieved to Hg in flue gas2+Removing.Utilize petrolenum sulfoxide water insoluble and density is less than 1
Character, Hg will have been trapped by simple oil water separator2+Petrolenum sulfoxide separate with desulfurization slurry, by separate
Containing Hg2+Petrolenum sulfoxide collect；Then hydrochloric acid solution it is added thereto to, with the Hg trapped by petrolenum sulfoxide2+Parse
Come, it is achieved the regeneration to petrolenum sulfoxide；The Hg of a new round is carried out in petrolenum sulfoxide after regeneration is passed through desulfurizing tower again2+Catch
Collection, finally by Hg2+Resolving hydrochloric acid liquid carry out electrolysis process, high-purity hydrargyrum can be prepared, prepared high-purity hydrargyrum can be
Alleviate the present situation of China's hydrargyrum scarcity of resources to a certain extent.Additionally, the exploitation of this demercuration system is also avoided that the Hg in flue gas2+Enter
Enter desulfurization slurry, exempt Hg2+Discharging again in desulfurization slurry, causes environmental pollution.
Accompanying drawing explanation
Fig. 1 is the structural representation schematic diagram removing system described in this utility model example.
In figure: tank used for storing ammonia 1, stirring system 2, aoxidize smoke inlet 3, spraying layer 4, demister system 5, exhanst gas outlet 6, slurry
Liquid circulating pump 7, primary oil water separator 8, two grades of oil water separators 9, Hg2+Electrolysis unit 10, liquid pure hydrargyrum collection device 11, stone
Oil sulfoxide stock solution storage tank 12, hydrochloric acid tank 13.
Detailed description of the invention
Below in conjunction with specific embodiment, this utility model is described in further detail, described in be to this utility model
Explanation rather than restriction.
Hg in this utility model one flue gas2+Removing system have only on conventional desulfurization system-based set up include
The petrolenum sulfoxide piece-rate system of primary oil water separator 8, include the petrolenum sulfoxide regenerative system of two grades of oil water separators 9, Hg2+Electricity
Solve device 10 and liquid pure hydrargyrum collection device 11, it is adaptable to coal fired boiler of power plant, steel sintering machine, Industrial Boiler, industry kiln
Stove etc. produce containing Hg2+Fume treatment.
Wherein, wet desulfurization system includes the slurry pool that wet desulfuration tower, wet desulfuration tower are internally formed, and connects flue
Oxidation smoke inlet 3, connects the tank used for storing ammonia 1 and petrolenum sulfoxide stock solution storage tank 12 arranged, is arranged on oxidation flue gas with slurry pool
Spraying layer 4 above entrance 3, except mist layer 5 and exhanst gas outlet 6, and connect spraying layer 4 and the slurry circulating pump 7 of slurry pool；Slurry
Liquid pool is provided with stirring system 2.
Petrolenum sulfoxide piece-rate system includes primary oil water separator 8, and the input of primary oil water separator 8 is with slurry pool even
Logical, the output of oil phase outfan is containing Hg2+Petrolenum sulfoxide, aqueous phase outfan output reclaim desulfurization slurry.
Petrolenum sulfoxide regenerative system, described petrolenum sulfoxide regenerative system includes two grades of oil water separators 9 and is connected to two
Hydrochloric acid tank 13 on level oil water separator 9；The input of two grades of oil water separators 9 is defeated with the oil phase of primary oil water separator 8
Go out end to connect, oil phase outfan output regeneration petrolenum sulfoxide, aqueous phase outfan output Hg2+Resolving hydrochloric acid liquid.
The oil phase outfan of the aqueous phase outfan of primary oil water separator 8 and two grades of oil water separators 9 is connected to respectively
The outlet side of slurry circulating pump 7, is connected with spraying layer 4.
Two grades of oil water separator 9 aqueous phase outfans connect Hg2+Electrolysis unit 10, Hg2+Electrolysis unit 10 is for by Hg2+'s
Resolving hydrochloric acid liquid carries out electrolysis process and obtains hydrargyrum, Hg2+Connecting on electrolysis unit 10 has the liquid pure hydrargyrum for storing hydrargyrum to receive
Acquisition means 11.
This utility model in use, by adding Hg in desulfurization slurry2+The petrolenum sulfoxide that complexing power is strong, with de-
Hg in smoke abatement gas2+, exempt Hg in conventional wet lay desulfurization technology2+Reduction in desulfurization slurry discharges again.Demercuration absorbent stone
Oil sulfoxide is with sour crude or high sulfur-containing diesel as raw material, is prepared, its water insoluble and density ratio by oxidation, extract and separate
Water is little, it is adaptable to wet desulfurization system.Concrete comprises the steps.
1) in wet desulfurization system, water-fast petrolenum sulfoxide is added in desulfurization slurry by mixing spray with
By the Hg in flue gas2+Trap in petrolenum sulfoxide, it is achieved to Hg in flue gas2+Removing.
2) Hg will have been trapped2+The step that separates with desulfurization slurry of petrolenum sulfoxide, be recycled after separation desulfurization slurry and
Containing Hg2+Petrolenum sulfoxide；
3) by separate containing Hg2+Petrolenum sulfoxide collect after, add the Hg that trapped by petrolenum sulfoxide of hydrochloric acid solution2+
Parse, obtain regenerating petrolenum sulfoxide and Hg2+Resolving hydrochloric acid liquid, and will reclaim desulfurization slurry and regeneration petrolenum sulfoxide again
It is linked in wet desulfurization system, re-starts desulfurization and Hg2+Trapping.
4) by Hg2+Resolving hydrochloric acid liquid carry out electrolysis process prepare hydrargyrum step.
The flue gas used in this preferred embodiment is laboratory simulation flue gas.Laboratory simulation flue gas consists of N2、O2、HCl、
Hg0, at HCl and O2Under conditions of existence, use SCR denitration by Hg0It is oxidized to Hg2+, Hg in flue gas subsequently2+With oil
Sulfoxide contacts with desulfurization slurry mixed liquor and is caught by petrolenum sulfoxide, Hg0Oxygenation efficiency and Hg2+Removal efficiency Ontario method
(ASTM D6784-02) analyzes.
When in simulated flue gas, HCl concentration is 350mg/m3、O2When concentration is 10%, Hg0Oxygenation efficiency close to 100%.Now
With petrolenum sulfoxide for demercuration absorbent, its Hg2+Removal efficiency is up to 99%.Catch with the hydrochloric acid solution washing of 2-8M, preferably 6M subsequently
Collect Hg2+Petrolenum sulfoxide, the Hg trapped2+Washing is got off, to realize regeneration and the Hg of petrolenum sulfoxide2+Focus on,
Wherein the regeneration rate of petrolenum sulfoxide is 96.8%.Under the effect of high concentration HCl, H+And Hg2+Be combined with sulfoxide group competitively,
Although Hg2+Binding ability be better than H+But, H+Quantity far more than Hg2+；Additionally, Cl-To Hg2+There is stronger complexation make
With.So that Hg2+It is to take off from petrolenum sulfoxide, it is achieved the regeneration of petrolenum sulfoxide.And petrolenum sulfoxide is added desulfurization slurry
In liquid, desulfuration efficiency is not produced impact.And in the petrolenum sulfoxide after regeneration is passed through desulfurizing tower again, carry out the Hg of a new round2+
Trapping, finally by Hg2+Resolving hydrochloric acid liquid carry out electrolysis process, by Hg2+It is electrolyzed to produce Hg0, high-purity hydrargyrum can be prepared, made
Standby high-purity hydrargyrum can alleviate the present situation of China's hydrargyrum scarcity of resources to a certain extent.
According to the experimental result of laboratory simulation flue gas, can instruct in actual coal-burning power plant wet desulfuration tower in serosity
Add water-fast petrolenum sulfoxide, to remove the Hg in flue gas2+, to be prevented effectively from Hg2+Enter in desulfurization slurry, cause hydrargyrum
Discharge again.
It should be noted that above-mentioned embodiment is illustrative, it not determinate, it is impossible to come with above-mentioned embodiment
Limit protection domain of the present utility model.
Claims (6)
1. Hg in a flue gas2+Removing system, it is characterised in that include wet desulfurization system and petrolenum sulfoxide piece-rate system；
Described wet desulfurization system includes the slurry pool that wet desulfuration tower, wet desulfuration tower are internally formed, and connects the oxygen of flue
Change smoke inlet (3), connect the tank used for storing ammonia (1) and petrolenum sulfoxide stock solution storage tank (12) arranged with slurry pool, be arranged on oxidation
The spraying layer (4) of smoke inlet (3) top, and connect spraying layer (4) and the slurry circulating pump (7) of slurry pool；
Described petrolenum sulfoxide piece-rate system includes primary oil water separator (8), the input of primary oil water separator (8) and slurry
Liquid pool connects, and the output of oil phase outfan is containing Hg2+Petrolenum sulfoxide, aqueous phase outfan output reclaim desulfurization slurry, its aqueous phase export
End connects spraying layer (4).
Hg in a kind of flue gas the most according to claim 12+Removing system, it is characterised in that also include petrolenum sulfoxide again
Raw system, described petrolenum sulfoxide regenerative system includes two grades of oil water separators (9) and is connected on two grades of oil water separators (9)
Hydrochloric acid tank (13)；The input of two grades of oil water separators (9) is connected with the oil phase outfan of primary oil water separator (8),
Oil phase outfan output regeneration petrolenum sulfoxide, aqueous phase outfan output Hg2+Resolving hydrochloric acid liquid, its oil phase outfan connect spray
Layer (4).
Hg in a kind of flue gas the most according to claim 22+Removing system, it is characterised in that also include being connected to two grades
The Hg of oil water separator (9) aqueous phase outfan2+Electrolysis unit (10), Hg2+Electrolysis unit (10) is for by Hg2+Resolving hydrochloric acid
Liquid carries out electrolysis process and obtains hydrargyrum, Hg2+There is the liquid pure hydrargyrum collection device for storing hydrargyrum electrolysis unit (10) upper connection
(11)。
Hg in a kind of flue gas the most according to claim 22+Removing system, it is characterised in that primary oil water separator (8)
Aqueous phase outfan and the oil phase outfan of two grades of oil water separators (9) be connected to the outlet side of slurry circulating pump (7) respectively.
Hg in a kind of flue gas the most according to claim 12+Removing system, it is characterised in that slurry pool is provided with and stirs
Mix system (2).
Hg in a kind of flue gas the most according to claim 12+Removing system, it is characterised in that spray in wet desulfuration tower
Layer (4) has been sequentially arranged above except mist layer (5) and exhanst gas outlet (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620839775.2U CN205850577U (en) | 2016-08-04 | 2016-08-04 | The removing system of Hg2+ in a kind of flue gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620839775.2U CN205850577U (en) | 2016-08-04 | 2016-08-04 | The removing system of Hg2+ in a kind of flue gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106076107A (en) * | 2016-08-04 | 2016-11-09 | 西安热工研究院有限公司 | Hg in a kind of flue gas2+removing System and method for |
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- 2016-08-04 CN CN201620839775.2U patent/CN205850577U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106076107A (en) * | 2016-08-04 | 2016-11-09 | 西安热工研究院有限公司 | Hg in a kind of flue gas2+removing System and method for |
| CN106076107B (en) * | 2016-08-04 | 2018-08-07 | 西安热工研究院有限公司 | Hg in a kind of flue gas2+Removing System and method for |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170104 Termination date: 20190804 |