CN103341310B - Method for recycling gas-state zero-valence mercury and sulfur dioxide from non-ferrous metal metallurgy smoke gas - Google Patents
Method for recycling gas-state zero-valence mercury and sulfur dioxide from non-ferrous metal metallurgy smoke gas Download PDFInfo
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Abstract
The invention relates to a method for recycling gas-state zero-valence mercury and sulfur dioxide from non-ferrous metal metallurgy smoke gas. The method comprises the following steps of: preparing composite absorption liquid by using mercury sulfate, ferric sulfate and sulfuric acid serving as the main components; efficiently absorbing the zero-valence mercury in the smoke gas by using an absorption tower; converting the zero-valence mercury to sulphurous acid mercury; reacting the ferric sulfate with the sulfur dioxide to generate sulfuric acid by; and decomposing the generated sulphurous acid mercury into elemental mercury and mercury sulfate by virtue of a recycling device. In comparison with the prior art, the method has the advantages that the absorption efficiency of the smoke gas zero-valance mercury can be improved, the use amount of absorbents is reduced and the recycling of the zero-valence mercury is realized. Besides, due to recycling of sulfur dioxide, sulfuric acid can be recycled, the reducing action of the sulfur dioxide on Hg<2+> is reduced, and the overall recovery of the zero-valence is improved. Thus, the method is particularly suitable for discharge control of smoke gas mercury with high sulfur dioxide concentration.
Description
Technical field
The invention belongs to the air pollution control technique of field of environment protection, especially relate to and a kind ofly remove from non-ferrous metal metallurgy flue gas and reclaim the method for gaseous state nonvalent mercury and sulfur dioxide relieving haperacidity.
Background technology
As everyone knows, mercury is a kind of toxic pollutant, has the features such as the bioconcentration of persistence, easily animal migration and height.It is not only also very large to the harm of ecological environment, and produces direct or indirect harm to health.The sixties in 20th century five break out " minamata disease " event in Japan, are namely once serious mercury pollution disasters.
United Nations Environment Programme (UNEP) is classified as mercury as global contaminant.The government-to-government talks committee the 5th meeting about mercury that in January, 2013 holds at Geneva, Switzerland, define " international control mercury pollution pact ", international community accelerates gradually to the paces that global mercury pollution controls.The mercury emission of current China is very large, and the Chinese government subjects huge international pressure just for this reason.In numerous mercury emissions source, the discharge capacity of non-ferrous metal metallurgy mercury in flue gas accounts for very large proportion.Tsing-Hua University's research shows: Mercury Emissions from Non-coal Sources in China in 2003 is 393t, wherein non-ferrous metal metallurgy discharge 330t, accounts for about 52% of the total mercury emission in the whole nation.But focus is all placed on the mercury control of coal-fired flue-gas by the outer most research of Present Domestic, ignores the research of non-ferrous metal metallurgy industry mercury control to a certain extent.Compared with coal-fired flue-gas, non-ferrous metal metallurgy flue gas has the features such as mercury concentration is high, sulfur dioxide concentration is high, production cycle fluctuation is large.So the removal of mercury technology being applicable to coal-fired flue-gas may not be effectively same in the mercury control of non-ferrous metal metallurgy flue gas.Meanwhile, although mercury is pollutant, is also a kind of scarce resource simultaneously, is all widely used in smelting, instrument manufacturing, chemical industry, medical industry and atomic energy industry etc.Therefore, for the feature that development non-ferrous metal metallurgy industry mercury in flue gas concentration is higher, should adopt to be recovered as main removal of mercury technology.Like this, both effectively can control the discharge of mercury in flue gas, the recycling to gas mercury can be realized again.
The roasting of non-ferrous metal metallurgy industry ore is generally carried out under the high temperature conditions, and the mercury overwhelming majority therefore in ore is with nonvalent mercury (Hg
0) form enter in flue gas.Different from coal-fired flue-gas, for the improvement of high concentration mercury fume, generally adopt the several methods such as condensation method, absorption method and absorption process both at home and abroad.Wherein namely the mercury in flue gas is concentrated cooling by specific condensing unit by the condensation method removal of mercury, and due to the saturated vapour pressure of mercury, sharply decline can condense from flue gas, thus reach the object be separated with flue gas.But the method mercury removal efficiency is on the low side, and energy consumption is comparatively large, general only as the pre-method for removing hydrargyrum of flue gas.Absorption method mainly utilizes selenium filter or carbon filter to adsorb the mercury in flue gas.But the adsorption capacity of selenium filter and carbon filter is generally only the 10-15% of own wt, therefore general being only applicable to, processes the lower flue gas of mercury content, is not suitable for the mercury process of non-ferrous metal metallurgy flue gas.Be mostly absorption process at the method for removing hydrargyrum that non-ferrous metal metallurgy sector application is many, wherein more representational is mercury chloride absorption process (Bo Lideng-Nuo Xinke absorption process).The essence of the method take mercuric chloride solution as absorbent, absorbs the nonvalent mercury in flue gas, and be translated into the calogreen (calomel) being insoluble in water, and calogreen can be used as product after precipitation and reclaims.At present, mercury chloride absorption process is one of the most effective gas mercury recovery process, occupies critical role in field of metallurgy.But there are some problems equally in this technique: first the gas mercury concentration of absorption tower entrance controls at 30mg/m by this technological requirement
3below, otherwise absorption efficiency has obvious decline, causes smoke mercury emission concentration over-standard; Secondly, in absorbing liquid, mercury chloride used is toxic articles equally, and its absorbing liquid concentration is generally about 3g/L, and use amount is comparatively large, there is larger environmental risk; 3rd, the outlet mercury concentration of this technique is generally 0.1mg/m
3, more and more stricter mercury emissions standard cannot be met.Therefore, a kind of new and effective stable absorption techniques is developed very necessary for the emission control and recycling realizing non-ferrous metal metallurgy gas mercury.
Summary of the invention
Object of the present invention be exactly provide to overcome defect that above-mentioned prior art exists a kind of efficient, stablize and there is the method reclaiming gaseous state nonvalent mercury and sulfur dioxide from non-ferrous metal metallurgy flue gas of anti-sulfur dioxide jamming performance.
Object of the present invention can be achieved through the following technical solutions: a kind of method reclaiming gaseous state nonvalent mercury and sulfur dioxide from non-ferrous metal metallurgy flue gas, is characterized in that, the method comprises following step:
The first step, is mixed with composite absorption liquid by mercuric sulfate, ferric sulfate and sulfuric acid and is stored in composite absorption liquid liquid pool (1);
Second step, composite absorption liquid in composite absorption liquid liquid pool (1) is sprayed in smoke absorption tower (4) by composite absorption liquid circulating slot (2), nonvalent mercury in the non-ferrous metal metallurgy flue gas of input smoke absorption tower (4) and sulfur dioxide are absorbed, wherein nonvalent mercury and mercuric sulfate react and generate mereurous sulfate, sulfur dioxide and ferric sulfate react and generate sulfuric acid and ferrous sulfate, and the composite absorption liquid after gas-liquid contact passes into recycling in composite absorption liquid circulating slot (2);
3rd step, until the ion concentration of mercury in composite absorption liquid circulating slot (2) drops to lower than after 25mmol/L, passes into part composite absorption liquid in mercury recovery device (9);
4th step, utilize mercury recovery device (9) by absorbing liquid in mereurous sulfate resolve into Elemental Mercury and mercuric sulfate absorbing liquid, wherein Elemental Mercury can reclaim as product after collecting purifying, and mercuric sulfate absorbing liquid returns in composite absorption liquid circulating slot (2) mercuric sulfate recycled to consume in supplementary flue gas nonvalent mercury absorption process;
5th step, until after the sulfate ion concentration in composite absorption liquid circulating slot (2) is greater than 8mol/L, pass into part composite absorption liquid in sulfuric acid solution separator (10); Sulfuric acid can as Product recycling after separation, purifying, concentrate, and remaining absorbing liquid then returns recycling in composite absorption liquid circulating slot (2).
Described composite absorption liquid key component is mercuric sulfate and sulfuric acid, in composite absorption liquid, mercuric sulfate concentration range is 50-200mmol/L, ferric sulfate concentration range is 0.5-1.5mol/L, sulfuric acid concentration ranges is 0.5-2.0mol/L, the temperature of composite absorption liquid remains on 40-60 DEG C, to guarantee the dissolving completely of mercuric sulfate.
Described smoke absorption tower (4) is spray column, packed tower or plate column.
Described mercury recovery device (9) is mainly photochemical reaction device, mereurous sulfate generates Elemental Mercury and mercuric sulfate through photodissociation, wherein Elemental Mercury can be used as Product recycling after collection, purifying, mercuric sulfate then passes in composite absorption liquid circulating slot (2) again, with the mercuric sulfate consumed in supplementary flue gas nonvalent mercury absorption process.
Described sulfuric acid solution separator (10) refers to membrane separation device or extraction separation device.
Research shows, take mercuric sulfate as absorbing liquid, the mercuric sulfate of low concentration can have higher absorption efficiency to nonvalent mercury, and when allocating a certain proportion of ferric sulfate in absorbing liquid into, this absorbing liquid not only can sulfur dioxide absorption make sulfuric acid, and can effectively resist sulfur dioxide to Hg
2+reduction.The present invention relates to key reaction equation is:
HgSO
4(l)+Hg
0(g)→Hg
2SO
4(s)
Hg
2SO
4→HgSO
4+Hg
0
Fe
2(SO
4)
3+SO
2+2H
2O→2FeSO
4+2H
2SO
4
2FeSO
4+SO
2+O
2→Fe
2(SO
4)
3
The mereurous sulfate that absorption plant generates is collected after coagulative precipitation, decomposed by methods such as photodissociation and generate mercuric sulfate and Elemental Mercury, mercuric sulfate is used for supplementing the mercuric sulfate consumed in flue gas nonvalent mercury absorption process, and Elemental Mercury can be used as Product recycling after collecting, purifying.
And sulfur dioxide is after the absorption of ferric sulfate, ferrous sulfate and sulfuric acid can be generated.Ferrous sulfate is reused through generating again ferric sulfate with sulfur dioxide and oxygen reaction.
With existing with mercury chloride be main component " Bo Lideng " technology compared with, the present invention has following advantages:
1, the composite absorption liquid that it is key component with mercuric sulfate, ferric sulfate and sulfuric acid that the present invention utilizes, can have higher absorption efficiency to nonvalent mercury, can ensure the qualified discharge of outlet mercury concentration under low concentration absorbing liquid condition;
2, the sulfuric acid that the present invention is used can be provided by the sulfur dioxide acid making system of enterprises, has both reduced process operation cost, has again reduced the environmental risk of toxic articles;
3, the present invention uses containing a certain amount of ferric sulfate in composite absorption liquid, and ferric sulfate can react with the sulfur dioxide in flue gas and generate ferrous sulfate and sulfuric acid, not only can reduce the generation of inferior sulfate radical thus reduce sulfur dioxide gas to Hg in absorbing liquid
2+reduction, high-concentration sulfur dioxide in flue gas can be carried out again effectively absorbing and relieving haperacidity, except the nonvalent mercury being applicable to general sulfur-containing smoke gas removes, be more applicable for removal and the recycling of non-ferrous metal metallurgy industry flue gas middle and high concentration mercury containing high-concentration sulfur dioxide and sulfur dioxide.
Accompanying drawing explanation
Fig. 1 is the equipment schematic diagram that the present invention adopts.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further described.The present embodiment is implemented under with technical solution of the present invention prerequisite, gives detailed embodiment and specific operation process, but protection scope of the present invention is not limited to following embodiment.
Main purpose of the present invention nonvalent mercury in general flue gas is carried out efficient absorption remove; Efficient absorption and recycling are carried out to the nonferrous smelting industry gas mercury containing middle and high concentration nonvalent mercury and higher concentration sulfur dioxide.In the implementation process of the present invention program, emphasis is to realize the efficient absorption of gas mercury for target.
Embodiment 1
Utilize glass bubbling device that a volume is 500mL as main reactor, in reactor, liquid measure remains on about 250mL.(1) composite absorption liquid is prepared: take certain mercuric sulfate and dissolved with sulfuric acid, and solution is heated to 40-60 degree, to ensure that mercuric sulfate dissolves completely, in composite absorption liquid, mercuric sulfate concentration is 50mmol/L, and sulfuric acid concentration is 0.5mol/L.(2) get the composite absorption liquid 250mL configured and be placed in bubbling reactor, in reactor, pass into initial nonvalent mercury concentration is 2mg/m
3simulated flue gas, flue gas flow controls at 1L/min, and record flue gas through the nonvalent mercury concentration of composite absorption liquid, and calculates the absorption removal efficiency of nonvalent mercury accordingly; Tail gas 5% liquor potassic permanganate absorbs; Device total output is provided by air pump.After adopting said method, the absorption efficiency of simulated flue gas nonvalent mercury reaches about 99%.(2), under same composite absorption liquid condition, passing into containing nonvalent mercury initial concentration in reactor is 2mg/m
3with containing 8000mg/m
3the simulated flue gas of sulfur dioxide, mixed flue gas flow-control is at 1L/min, and the mercury concentration of record flue gas after absorbing liquid absorbs, can calculate containing under high-concentration sulfur dioxide condition, the absorption efficiency of nonvalent mercury can about 50%.(3) in the composite absorption liquid of original preparation, add moderate amount of sulfuric acid iron, make ferric sulfate concentration be 1.0mol/L, mercuric sulfate concentration is 50mmol/L, and sulfuric acid concentration is 0.5mol/L; Passing into containing nonvalent mercury initial concentration in reactor is 2mg/m
3with containing 8000mg/m
3the simulated flue gas of sulfur dioxide, mixed flue gas flow-control is at 1L/min, after absorption reaction, calculate in flue gas containing under high-concentration sulfur dioxide condition, nonvalent mercury absorption efficiency can reach more than 95%, illustrates in absorbing liquid and adds the anti-sulfur dioxide jamming performance that appropriate sulfuric acid and chlorion can improve composite absorption liquid.And the removal efficiency of sulfur dioxide also reaches 85%, illustrate that this composite absorption liquid can effective sulfur dioxide absorption gas.
Embodiment 2
Utilize an internal diameter to be 100mm, the wet scrubber tower of the lucite material of long 1200mm is absorption reactor thermally.(1) composite absorption liquid is configured: take certain mercuric sulfate and dissolved with sulfuric acid, and solution is heated to 40-60 degree, to ensure that mercuric sulfate dissolves completely, in composite absorption liquid, mercuric sulfate concentration is 50mmol/L, and sulfuric acid concentration is 0.5mol/L.(2) be 2mg/m containing initial mercury concentration
3simulated flue gas enter from wash tower bottoms, through absorbing liquid washing after from top of tower get rid of enter online mercury vapourmeter, simulated flue gas flow is 3.0m
3/ h; Sprayed into through nozzle from tower top with the flow of 150mL/min by the composite absorption liquid prepared, scrubbing tower is squeezed in the Buffer Pool pump circulation from tower bottom after washing flue gas, and the liquid-gas ratio in absorption reactor thermally is 3.0L/m
3.(3) tail gas through mercury vapourmeter absorbs with 5% potassium permanganate.After adopting said method, in simulated flue gas, the absorption efficiency of nonvalent mercury can reach more than 90%.(4) the mercuric sulfate concentration in composite absorption liquid is increased to 100mmol/L, sulfuric acid concentration is 1.0mol/L, sprays in absorption reactor thermally under same flue gas condition and liquid-gas ratio condition, and result shows that the absorption efficiency of nonvalent mercury can reach more than 96%.(5) in composite absorption liquid, add a certain amount of ferric sulfate, make mercuric sulfate concentration in composite absorption liquid be 100mmol/L, ferric sulfate concentration is 1.0mol/L, and sulfuric acid concentration is 1.0mol/L, is 2mg/m by nonvalent mercury content
3be 8000mg/m with sulfur dioxide concentration
3simulated flue gas with 3.0m
3the flow of/h passes in absorption reactor thermally, and sprays in absorption reactor thermally by composite absorption liquid with the flow of 150mL/min, and result shows that the absorption efficiency of nonvalent mercury in flue gas can reach more than 85%, and sulfur dioxide absorption efficiency reaches about 80%.
Embodiment 3
The equipment adopted as shown in Figure 1, comprise composite absorption liquid liquid pool 1, composite absorption liquid circulating slot 2, smoke absorption tower 4, pump 8, mercury recovery device 9, sulfuric acid solution separator 10, smoke absorption tower 4 is spray column, side, bottom is provided with smoke absorption tower entrance 3, non-ferrous metal metallurgy flue gas inputs smoke absorption tower 4 from smoke absorption tower entrance 3, top is provided with absorbing liquid nozzle 7, tail gas demister 5 and smoke absorption tower outlet 6, wherein composite absorption liquid circulating slot 2 one end connects composite absorption liquid liquid pool 1, the other end connects pump 8 and absorbing liquid nozzle 7 successively by pipeline, by pump 8 by composite absorption liquid input absorbing liquid nozzle 7, spray in smoke absorption tower 4, mercury recovery device 9 connects pump 8 by branch road and exports, and be communicated with composite absorption liquid circulating slot 2, sulfuric acid solution separator 10 connects pump 8 by branch road and exports, and be communicated with composite absorption liquid circulating slot 2.
Adopt the said equipment from non-ferrous metal metallurgy flue gas, reclaim the method for gaseous state nonvalent mercury and sulfur dioxide, comprise following step:
The first step, is mixed with composite absorption liquid by mercuric sulfate, ferric sulfate and sulfuric acid and is stored in composite absorption liquid liquid pool 1; Described composite absorption liquid key component is mercuric sulfate and sulfuric acid, in composite absorption liquid, mercuric sulfate concentration is 200mmol/L, and ferric sulfate concentration is 1.5mol/L, and sulfuric acid concentration is 2.0mol/L, the temperature of composite absorption liquid remains on 40-60 DEG C, to guarantee the dissolving completely of mercuric sulfate.
Second step, composite absorption liquid in composite absorption liquid liquid pool 1 is sprayed in smoke absorption tower 4 by composite absorption liquid circulating slot 2, nonvalent mercury in the non-ferrous metal metallurgy flue gas of input smoke absorption tower 4 and sulfur dioxide are absorbed, wherein nonvalent mercury and mercuric sulfate react and generate mereurous sulfate, sulfur dioxide and ferric sulfate react and generate sulfuric acid and ferrous sulfate, and the composite absorption liquid after gas-liquid contact passes in composite absorption liquid circulating slot 2 and reuses; Smoke absorption tower 4 is spray column.
3rd step, until the ion concentration of mercury in composite absorption liquid circulating slot 2 drops to lower than after 25mmol/L, passes into part composite absorption liquid in mercury recovery device 9; Mercury recovery device 9 is mainly photochemical reaction device, mereurous sulfate generates Elemental Mercury and mercuric sulfate through photodissociation, wherein Elemental Mercury can be used as Product recycling after collection, purifying, mercuric sulfate then passes in composite absorption liquid circulating slot 2 again, with the mercuric sulfate consumed in supplementary flue gas nonvalent mercury absorption process.
4th step, utilize mercury recovery device 9 by absorbing liquid in mereurous sulfate resolve into Elemental Mercury and mercuric sulfate absorbing liquid, wherein Elemental Mercury can reclaim as product after collecting purifying, and mercuric sulfate absorbing liquid returns in composite absorption liquid circulating slot 2 mercuric sulfate recycled to consume in supplementary flue gas nonvalent mercury absorption process;
5th step, until after the sulfate ion concentration in composite absorption liquid circulating slot 2 is greater than 8mol/L, pass in sulfuric acid solution separator 10 by part composite absorption liquid; Sulfuric acid can as Product recycling after separation, purifying, concentrate, and remaining absorbing liquid then returns in composite absorption liquid circulating slot 2 and reuses; Described sulfuric acid solution separator 10 refers to membrane separation device or extraction separation device.
Embodiment 4
From non-ferrous metal metallurgy flue gas, reclaim the method for gaseous state nonvalent mercury and sulfur dioxide, comprise following step:
The first step, is mixed with composite absorption liquid by mercuric sulfate, ferric sulfate and sulfuric acid and is stored in composite absorption liquid liquid pool; Described composite absorption liquid key component is mercuric sulfate and sulfuric acid, in composite absorption liquid, mercuric sulfate concentration range is 50mmol/L, and ferric sulfate concentration range is 0.5mol/L, and sulfuric acid concentration ranges is 0.5mol/L, the temperature of composite absorption liquid remains on 40-60 DEG C, to guarantee the dissolving completely of mercuric sulfate.
Second step, composite absorption liquid in composite absorption liquid liquid pool is sprayed in smoke absorption tower by composite absorption liquid circulating slot, nonvalent mercury in the non-ferrous metal metallurgy flue gas of input smoke absorption tower and sulfur dioxide are absorbed, wherein nonvalent mercury and mercuric sulfate react and generate mereurous sulfate, sulfur dioxide and ferric sulfate react and generate sulfuric acid and ferrous sulfate, and the composite absorption liquid after gas-liquid contact passes in composite absorption liquid circulating slot and reuses; Smoke absorption tower is packed tower.
3rd step, until the ion concentration of mercury in composite absorption liquid circulating slot drops to lower than after 25mmol/L, passes into part composite absorption liquid in mercury recovery device; Mercury recovery device is mainly photochemical reaction device, mereurous sulfate generates Elemental Mercury and mercuric sulfate through photodissociation, wherein Elemental Mercury can be used as Product recycling after collection, purifying, mercuric sulfate then passes in composite absorption liquid circulating slot again, with the mercuric sulfate consumed in supplementary flue gas nonvalent mercury absorption process.
4th step, utilize mercury recovery device by absorbing liquid in mereurous sulfate resolve into Elemental Mercury and mercuric sulfate absorbing liquid, wherein Elemental Mercury can reclaim as product after collecting purifying, and mercuric sulfate absorbing liquid returns in composite absorption liquid circulating slot the mercuric sulfate recycled to consume in supplementary flue gas nonvalent mercury absorption process;
5th step, until after the sulfate ion concentration in composite absorption liquid circulating slot is greater than 8mol/L, pass in sulfuric acid solution separator by part composite absorption liquid; Sulfuric acid can as Product recycling after separation, purifying, concentrate, and remaining absorbing liquid then returns in composite absorption liquid circulating slot and reuses; Described sulfuric acid solution separator refers to membrane separation device or extraction separation device.
Claims (5)
1. from non-ferrous metal metallurgy flue gas, reclaim a method for gaseous state nonvalent mercury and sulfur dioxide, it is characterized in that, the method comprises following step:
The first step, is mixed with composite absorption liquid by mercuric sulfate, ferric sulfate and sulfuric acid and is stored in composite absorption liquid liquid pool (1);
Second step, composite absorption liquid in composite absorption liquid liquid pool (1) is sprayed in smoke absorption tower (4) by composite absorption liquid circulating slot (2), nonvalent mercury in the non-ferrous metal metallurgy flue gas of input smoke absorption tower (4) and sulfur dioxide are absorbed, wherein nonvalent mercury and mercuric sulfate react and generate mereurous sulfate, sulfur dioxide and ferric sulfate react and generate sulfuric acid and ferrous sulfate, and the composite absorption liquid after gas-liquid contact passes into recycling in composite absorption liquid circulating slot (2);
3rd step, until the ion concentration of mercury in composite absorption liquid circulating slot (2) drops to lower than after 25mmol/L, passes into part composite absorption liquid in mercury recovery device (9);
4th step, utilize mercury recovery device (9) that the mereurous sulfate in absorbing liquid is resolved into Elemental Mercury and mercuric sulfate absorbing liquid, wherein Elemental Mercury reclaims as product after collecting purifying, and mercuric sulfate absorbing liquid returns in composite absorption liquid circulating slot (2) mercuric sulfate recycled to consume in supplementary flue gas nonvalent mercury absorption process;
5th step, until after the sulfate ion concentration in composite absorption liquid circulating slot (2) is greater than 8mol/L, pass into part composite absorption liquid in sulfuric acid solution separator (10); Sulfuric acid is as Product recycling after separation, purifying, concentrate, and remaining absorbing liquid then returns recycling in composite absorption liquid circulating slot (2).
2. a kind of method reclaiming gaseous state nonvalent mercury and sulfur dioxide from non-ferrous metal metallurgy flue gas according to claim 1, it is characterized in that, described composite absorption liquid key component is mercuric sulfate, ferric sulfate and sulfuric acid, in composite absorption liquid, mercuric sulfate concentration range is 50-200mmol/L, ferric sulfate concentration range is 0.5-1.5mol/L, sulfuric acid concentration ranges is 0.5-2.0mol/L, and the temperature of composite absorption liquid remains on 40-60 DEG C, to guarantee the dissolving completely of mercuric sulfate.
3. a kind of method reclaiming gaseous state nonvalent mercury and sulfur dioxide from non-ferrous metal metallurgy flue gas according to claim 1, is characterized in that, described smoke absorption tower (4) is spray column, packed tower or plate column.
4. a kind of method reclaiming gaseous state nonvalent mercury and sulfur dioxide from non-ferrous metal metallurgy flue gas according to claim 1, it is characterized in that, described mercury recovery device (9) is photochemical reaction device, mereurous sulfate generates Elemental Mercury and mercuric sulfate through photodissociation, wherein Elemental Mercury through collecting, after purifying as Product recycling, mercuric sulfate then passes in composite absorption liquid circulating slot (2) again, with the mercuric sulfate consumed in supplementary flue gas nonvalent mercury absorption process.
5. a kind of method reclaiming gaseous state nonvalent mercury and sulfur dioxide from non-ferrous metal metallurgy flue gas according to claim 1, is characterized in that, described sulfuric acid solution separator (10) refers to membrane separation device or extraction separation device.
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| CN101590362B (en) * | 2009-06-12 | 2012-06-27 | 浙江天蓝环保技术股份有限公司 | Flue gas mercury absorption liquid with functions of oxidizing and fixing synchronously |
| CN102688677B (en) * | 2012-06-12 | 2014-08-20 | 上海交通大学 | Method for enhancing total mercury recovery rate of metallurgical fume by reducing bivalent mercury |
| CN103143252B (en) * | 2013-02-22 | 2015-06-10 | 广东电网公司电力科学研究院 | Additive capable of simultaneous desulphurization and demercuration and preparation method thereof |
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