CN106914119A - A kind of utilization dust waste water removes the device of mercury in flue gas - Google Patents
A kind of utilization dust waste water removes the device of mercury in flue gas Download PDFInfo
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- CN106914119A CN106914119A CN201710167138.4A CN201710167138A CN106914119A CN 106914119 A CN106914119 A CN 106914119A CN 201710167138 A CN201710167138 A CN 201710167138A CN 106914119 A CN106914119 A CN 106914119A
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- Prior art keywords
- waste water
- flue gas
- mercury
- removes
- magnetic
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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
- B01D53/79—Injecting reactants
-
- 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
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- 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
Abstract
A kind of utilization dust waste water removes the device of mercury in flue gas, for in the flue gas demercuration of coal-burning power plant, including denitrator, deduster and desulfurizing tower, denitrator, deduster and desulfurizing tower are sequentially connected by flue, in denitrator 3 atomizers of anterior setting, 2 atomizers are set before deduster, vulcanized sodium pond and magnetic adsorbent storage tank are set up, for removing the mercury in flue gas.Simple structure of the present invention, demercuration efficiency is high, and the recyclable recycling of additive, it is adaptable to industrialized production.
Description
Technical field
The present invention provides the device that a kind of utilization dust waste water removes mercury in flue gas, is particularly well-suited to the flue gas of coal-burning power plant
In demercuration, belong to the processing technology field of waste gas.
Background technology
Coal is produced compared with multi-pollutant in combustion as topmost fuel in power plant combustion, mainly there is SO2、
CO, nitrogen oxides etc., Hg are one of trace elements in coal, and it discharges into the atmosphere with burning of coal with flue gas.Due to Hg
Pollutant has stronger physiological-toxicity and bioaccumulation, and high risks, therefore various countries can be produced to human and environment to flue gas
The content of middle Hg has strict emission standards.
Hg in flue gas has three kinds of existing forms, respectively：HgP, Hg0, Hg2+, its discharge ratio is respectively 16%, 61%
With 23%.In three kinds of mercury elements of form, HgPCan be removed, Hg by particulate control device (such as electrostatic precipitator)2+Can lead to
Absorption method, washing method is crossed to remove, and Hg0It is difficult to directly remove, at present generally Hg0It is oxidized to Hg2+, and then Hg is all de-
Remove.
The content of the invention
The present invention is the drawback of solution prior art, there is provided a kind of utilization dust waste water removes the device of mercury in flue gas, its
Demercuration efficiency is high, and the repeatable utilization of day class.
Technical problem of the present invention is solved by the following technical programs：
A kind of utilization dust waste water removes the device of mercury in flue gas, including denitrator, deduster and desulfurizing tower, the denitration
Device, deduster and desulfurizing tower are sequentially connected by flue, and desulfurization tower bottom is provided with waste water tank, and the waste water tank middle part is provided with
Waste pipe, the other end of waste pipe is parallel with 5 atomizers, and waste water tank is externally provided with vulcanized sodium pond, vulcanized sodium pond with it is useless
Water pot is connected by jet, and filter, fluid reservoir and water pump, the storage are sequentially provided between the waste water tank and atomizer
Flow container top sets magnetic adsorbent storage tank.
Above-mentioned utilization dust waste water removes the device of mercury in flue gas, sets up retracting device, and the retracting device includes reclaiming
Pond, magnetic disk and scraper plate, the recovery pond are connected with liquid storage pot bottom, and recovery pond middle part is provided with overflow plate, the magnetic circle
Disk is arranged on the inflow side of overflow plate, and the latter half is arranged in recovery pond, and the magnetic disk includes two sides, away from overflow plate
Side is insulating materials, is magnetic material near overflow plate side；The scraper plate be arranged on magnetic disk magnetic material side, length with
Magnetic disk radius is identical.
Above-mentioned utilization dust waste water removes the device of mercury in flue gas, and the magnetic adsorbent in the magnetic adsorbent storage tank is
Selenium receive modification rice corpuscles load or ferriferous oxide magnetic carbon-nano tube composite material one or two.
Above-mentioned utilization dust waste water removes the device of mercury in flue gas, and the waste water pot bottom is provided with pipeline, and pipeline passes through water
Pump connects desulfurizing tower.
Above-mentioned utilization dust waste water removes the device of mercury in flue gas, and the atomizer is distributed as：Denitrator front portion sets
3 are put, 2 are set before deduster.
Above-mentioned utilization dust waste water removes the device of mercury in flue gas, and air preheater, denitrator are provided with after the denitrator
Warm area be 320-420 DEG C, the warm area of air preheater is 150-200 DEG C, and the warm area of deduster is 100-150 DEG C.
Above-mentioned utilization dust waste water removes the device of mercury in flue gas, and the waste pipe is provided with air compressor.
The present invention has advantages below：
The present invention further removes the mercury contained in flue gas using the waste water in boiler smoke, each due to containing in flue gas
Plant ionic species, such as Cl-、Cu2+Plasma can make Hg0It is oxidized to Hg2+, Hg2+Reacted with vulcanized sodium, and be eliminated.Hg0Utilize
Chemical removal rate can reach 98%, to magnetic adsorbent is added in waste water, remove remaining sub-fraction Hg0, set and reclaim dress
Put, the magnetic adsorbent in recoverable wastewater, magnetic adsorbent secondary can be utilized, energy-conserving and environment-protective.
Brief description of the drawings
Fig. 1 is schematic flow sheet of the present invention；
Fig. 2 is magnetic disk structural representation of the present invention.
Each sequence number is expressed as in figure：1st, boiler, 2, denitrator, 3, air preheater, 4, deduster, 5, desulfurization
Tower, 6, chimney, 7, waste water tank, 8, fluid reservoir, 9, water pump, 10, air compressor, 11, atomizer, 12, vulcanized sodium pond, 13,
Filter, 14, jet, 15, flue, 16, waste pipe, 17, magnetic adsorbent storage tank, 18, recovery pond, 19, motor,
20th, magnetic disk, 21, scraper plate, 22, overflow plate, 23, bearing.
Specific embodiment
Refering to accompanying drawing 1, the present invention includes denitrator 2, deduster 4 and desulfurizing tower 5, the denitrator 2, deduster 4 with it is de-
Sulphur tower 5 is sequentially connected by flue 15, and the bottom of desulfurizing tower 5 is provided with waste water tank 7, and the middle part of the waste water tank 7 is provided with waste pipe
Road, the other end of waste pipe is parallel with 5 atomizers 11, and atomizer 11 is located in flue 15, the peripheral hardware of waste water tank 7
There is vulcanized sodium pond 12, vulcanized sodium pond 12 is connected with waste water tank 7 by jet 14.By the flue gas discharged in boiler 1, via flue gas
By denitrator 2, the warm area of denitrator 2 is 320-420 DEG C to pipeline, for removing nitride in flue gas, afterwards by deduster
4, deduster removes Hgp (particle mercury) by electrostatic interaction, finally by desulfurizing tower 5, the sulfide in removing flue gas, mist
Change nozzle 11 to remaining desulfurization wastewater in penetrating desulfurizing tower 5 in pipeline, desulfurization wastewater contains Cl-、Cu2+Plasma, makes Hg0Quilt
It is oxidized to Hg2+, to spraying into vulcanized sodium, Hg in waste water tank 72+In waste water tank 7, generate solids of sedimentation with vulcanized sodium and be removed.
Filter 13, fluid reservoir 8 and water pump 9 are sequentially provided between the waste water tank 7 and atomizer 11, in order to prevent mist
Change nozzle 11 to be blocked by the solid particle in waste water, the setting filter 13 between waste water tank 8 and atomizer 11, and fluid reservoir
8 waste water being used for after stored filter, make the wastewater flow stabilization that atomizer 11 sprays.
The bottom of the waste water tank 7 is provided with pipeline, and pipeline connects desulfurizing tower 5, partial desulfurization waste liquid can be beaten by water pump 9
It is back in desulfurizing tower and is reused, improves the utilization rate of desulfurization waste liquor.
In order that the Hg of residual0It is removed, magnetic adsorbent storage tank 17, magnetic adsorbent storage is set at the top of fluid reservoir 8
Selenium nano particles load and ferriferous oxide magnetic carbon-nano tube composite material are contained with tank 17, are used to adsorb residual in flue gas
Hg0, make the in hgher efficiency of removing.
Retracting device is set up, for reclaiming the magnetic adsorbent in waste water, the retracting device includes recovery pond 18, magnetic
Disk 20 and scraper plate 21, the recovery pond 18 are connected with the bottom of fluid reservoir 8, and the middle part of recovery pond 18 is provided with overflow plate 22, the magnetic
Property disk 20 be arranged on the inflow side of overflow plate 22, the latter half is arranged in recovery pond 18, and the magnetic disk 20 includes two
Face, is insulating materials away from the side of overflow plate 22, is magnetic material near the side of overflow plate 22；The scraper plate 21 is arranged on magnetic disk
20 magnetic material side, length is identical with the radius of magnetic disk 20, scraper plate 21 and the top half angle R of magnetic disk 201It is 45
DEG C, with horizontal direction angle R2It is 30 DEG C.Magnetic disk rotation takes magnetic adsorbent out of solution, is scraped by scraper plate 17 and collected
To in catalyst collection pond, the magnetic adsorbent for gathering can further regenerate and use.
The atomizer is distributed as：Denitrator 3, before deduster 4 set 2, atomizer into multigroup distribution, to cigarette
Hg in gas0Repeatedly aoxidized, to ensure the Hg in flue gas0It is fully oxidized and dispels.
Air preheater 3 is provided with after the denitrator 2, the warm area of denitrator 2 is 320-420 DEG C, at this temperature, Hg0
It is oxidized to Hg2+Efficiency up to more than 98%, the warm area of air preheater 3 is 150-200 DEG C, at this temperature, Hg0It is oxidized
It is Hg2+Efficiency up to more than 90%, the warm area of deduster 4 is 100-150 DEG C, at this temperature, Hg0It is oxidized to Hg2+Effect
Rate is up to 40% or so.The waste pipe 16 is provided with air compressor 10.
Claims (7)
1. a kind of utilization dust waste water removes the device of mercury in flue gas, including denitrator (2), deduster (4) and desulfurizing tower (5),
Characterized in that, the denitrator (2), deduster (4) are sequentially connected with desulfurizing tower (5) by flue (15), desulfurizing tower
(5) bottom is provided with waste water tank (7), and waste water tank (7) middle part is provided with waste pipe (16), and the other end of waste pipe (16) is simultaneously
5 atomizers (11) are associated with, waste water tank (7) is externally provided with vulcanized sodium pond (12), and vulcanized sodium pond (12) are with waste water tank (7) by spray
Loophole (14) is connected, and filter (13), fluid reservoir (8) and water are sequentially provided between the waste water tank (7) and atomizer (11)
Pump (9), fluid reservoir (8) top sets magnetic adsorbent storage tank (17).
2. a kind of utilization dust waste water according to claim 1 removes the device of mercury in flue gas, it is characterised in that set up back
Receiving apparatus, the retracting device includes recovery pond (18), magnetic disk (20) and scraper plate (21), the recovery pond (18) and liquid storage
Tank (8) bottom is connected, and recovery pond (18) middle part is provided with overflow plate (22), and the magnetic disk (20) is installed in overflow plate (22)
Inflow side, the latter half is arranged in recovery pond (18), and the magnetic disk (20) includes two sides, is away from overflow plate (22) side
Insulating materials, is magnetic material near overflow plate (22) side；Magnetic material of the scraper plate (21) installed in magnetic disk (20)
Side, length is identical with magnetic disk (20) radius.
3. a kind of utilization dust waste water according to claim 2 removes the device of mercury in flue gas, it is characterised in that the magnetic
Property adsorbent tank (17) in magnetic adsorbent for selenium receive the load of modification rice corpuscles or ferriferous oxide magnetic carbon nano-tube it is compound
Material one or two.
4. a kind of utilization dust waste water according to claim 3 removes the device of mercury in flue gas, it is characterised in that described useless
Water pot (7) bottom is provided with pipeline, and pipeline connects desulfurizing tower (5) by water pump (9).
5. a kind of utilization dust waste water according to claim 4 removes the device of mercury in flue gas, it is characterised in that the mist
Change being distributed as nozzle：Denitrator (2) is anterior to set setting 2 before 3, deduster (4).
6. a kind of utilization dust waste water according to claim 5 removes the device of mercury in flue gas, it is characterised in that described de-
Air preheater (3) is provided with after nitre device (2), the warm area of denitrator (2) is 320-420 DEG C, and the warm area of air preheater (3) is
150-200 DEG C, the warm area of deduster (4) is 100-150 DEG C.
7. a kind of utilization dust waste water according to claim 6 removes the device of mercury in flue gas, it is characterised in that described useless
Waterpipe (16) is provided with air compressor (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710167138.4A CN106914119A (en) | 2017-03-20 | 2017-03-20 | A kind of utilization dust waste water removes the device of mercury in flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710167138.4A CN106914119A (en) | 2017-03-20 | 2017-03-20 | A kind of utilization dust waste water removes the device of mercury in flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106914119A true CN106914119A (en) | 2017-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710167138.4A Pending CN106914119A (en) | 2017-03-20 | 2017-03-20 | A kind of utilization dust waste water removes the device of mercury in flue gas |
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| CN (1) | CN106914119A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107930359A (en) * | 2017-12-21 | 2018-04-20 | 华北电力大学（保定） | The apparatus and method that elemental mercury in coal-fired flue-gas is removed using desulfurization wastewater |
Citations (4)
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|---|---|---|---|---|
| CN105233687A (en) * | 2015-10-21 | 2016-01-13 | 华北电力大学（保定） | Method for removing elemental mercury in coal-fired flue gas |
| CN105289261A (en) * | 2015-11-20 | 2016-02-03 | 中南大学 | Washing liquid for eluting mercury in mercury-containing flue gas and method for recovering mercury form mercury-containing flue gas |
| CN205102149U (en) * | 2015-10-27 | 2016-03-23 | 浙江天地环保工程有限公司 | Multiple gas cleaning is demercuration device in coordination |
| CN106334623A (en) * | 2016-10-09 | 2017-01-18 | 京磁材料科技股份有限公司 | Disc type magnetic mud separating device |
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2017
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Patent Citations (4)
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|---|---|---|---|---|
| CN105233687A (en) * | 2015-10-21 | 2016-01-13 | 华北电力大学（保定） | Method for removing elemental mercury in coal-fired flue gas |
| CN205102149U (en) * | 2015-10-27 | 2016-03-23 | 浙江天地环保工程有限公司 | Multiple gas cleaning is demercuration device in coordination |
| CN105289261A (en) * | 2015-11-20 | 2016-02-03 | 中南大学 | Washing liquid for eluting mercury in mercury-containing flue gas and method for recovering mercury form mercury-containing flue gas |
| CN106334623A (en) * | 2016-10-09 | 2017-01-18 | 京磁材料科技股份有限公司 | Disc type magnetic mud separating device |
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| 刘纪福等: "《余热回收的原理与设计》", 30 June 2016, 哈尔滨工业大学出版社 * |
| 张杨阳: "基于新材料的气态元素汞脱除技术基础研究", 《中国优秀硕士学位论文全文数据库》 * |
| 胡将军等: "《烟气脱汞》", 29 February 2016, 中国电力出版社 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107930359A (en) * | 2017-12-21 | 2018-04-20 | 华北电力大学（保定） | The apparatus and method that elemental mercury in coal-fired flue-gas is removed using desulfurization wastewater |
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Application publication date: 20170704 |
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