CN103585847A - Device and method for removing sulfur and dust in lead-bearing flue gas - Google Patents
Device and method for removing sulfur and dust in lead-bearing flue gas Download PDFInfo
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- CN103585847A CN103585847A CN201310574383.9A CN201310574383A CN103585847A CN 103585847 A CN103585847 A CN 103585847A CN 201310574383 A CN201310574383 A CN 201310574383A CN 103585847 A CN103585847 A CN 103585847A
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Abstract
The embodiment of the invention discloses a device and method for removing sulfur and dust in lead-bearing flue gas. With a desulfurizing tower serving as the main body, the device includes a flue gas inlet, fiber woven layers, a lead dust storage bin, a gas equalizing chamber, a booster fan, a first filter layer, slurry nozzles, a steam separator, an electric dust remover, an induced draft fan, a chimney, a second filter layer, a circulating pump and a slurry circulation tank. The device has the advantages of high lead dust removal rate and desulfurization efficiency, continuity and stability of operation, and low operating costs, and can solve the problems of excessive lead and sulfur contents of flue gas and excessive lead content of desulfurization gypsum.
Description
Technical field
The present invention relates to environmental protection technical field, relate in particular to a kind of desulfation dust-extraction device and method containing lead fume.
Background technology
Lead is a kind of than great (11.34), and the silver gray metal of fusing point low (327.1 ℃), as a kind of extremely harmful heavy metal element, lead generally passes through respiratory tract, alimentary canal enters body, almost all organs is all caused damage, the most serious to children's body development and Intelligence; SO
2be a kind of colourless gas with intense stimulus smell, the soluble blood in human body and other stickiness liquid, decline body immunity, and resistance against diseases dies down, the SO in atmosphere
2can cause respiratory inflammation, bronchitis, pulmonary emphysema, eye conjunctivitis disease etc.According to the production feature of enterprise of regeneration factory, in secondary lead smelting process, can produce a large amount of high-temperature dust-containing flue gas, generally after high temperature utilization, bag-type dust and wet desulphurization, enter in atmosphere, yet because sack cleaner dust removing effects is undesirable, cause a large amount of leaded flue dust to enter desulphurization system with flue gas, the lead content of byproduct desulfurated plaster is exceeded standard, can only treat as hazardous waste disposal, cannot further utilize.Meanwhile, because the desulphurization system of using is now generally Pneumatic emulsifying system or spray system,, easily there is pipeline scale in fluctuation of service, the problems such as obstruction, and desulfuration efficiency is unsatisfactory, and flue gas sulfur content is easy to exceed standard; Flue gas after desulfurization can be taken the leaded droplet of a part of sulfur-bearing out of in addition, also can make the leaded sulfur content of flue gas that enters atmosphere exceed standard, if do not solve, can make an extremely bad impression to human body and environment.
In prior art scheme, leaded sulphur-containing exhaust gas processing method is generally separately carried out dust removal process and sweetening process, first carry out flue gas ash removal, then carry out flue gas desulfurization.The method of flue gas ash removal mainly contains electrostatic method, filtration method and absorption process, under the suitable condition of operation, three class methods all can reach higher efficiency of dust collection, but electrostatic method easily causes reentrainment of dust, pole plate dust thickness surpasses after allowed band, and efficiency of dust collection declines to a great extent; Filtration method be take bag-type dust as example, after operation a period of time, and because of filter bag damage, the reasons such as the system failure, the efficiency of bag-type dust is unsatisfactory, uses the method for sack cleaner series connection, although efficiency of dust collection can reach more than 99%, invests too highly, and utilization rate of equipment and installations is low.Absorption process be take bubble tower as example, because of process integration for this reason desulfurization and two processes of dedusting, although avoided energy consumption large, safeguard the problems such as complicated, and efficiency of dust collection is high, lead dust is easy to enter desulfurated plaster, and the subsequent treatment of desulfurated plaster is more bothered.
Flue gas desulfurization is mainly divided into dry desulfurization and wet desulphurization, wherein dry desulfurization mainly contains electron-beam desulfurization technique, dry method injection desulfurization technology etc., because dry desulfurization itself is difficult to reach the standard of high-efficiency desulfurization, wet desulphurization is mainly used in present flue gas desulfurization, the capital equipment of different wet desulfurizing process is desulfurizing tower, main difference is structure and the form of desulfurizing tower, present stage, applied desulfurizing tower mainly contained packed tower, bubble tower, spray column, wherein packed tower is early stage desulfurization turriform, due to corrosion, wearing and tearing, the problems such as obstruction are serious, system cannot steady in a long-term be moved, bubble tower floor space is large, and byproduct desulfurated plaster lead tolerance is high, is difficult to process, during spray column operation, have a large amount of slurries drops and enter atmosphere with flue gas, flue gas lead tolerance is easy to exceed standard.Therefore designing a science, flue-gas dust-removing and desulfurization device and method efficiently, has been extremely urgent thing to guarantee that the leaded sulfur content of flue gas after flue-gas dust-removing and desulfurization, desulfurated plaster lead tolerance meet relevant criterion.
Summary of the invention
The object of this invention is to provide a kind of desulfation dust-extraction device and method containing lead fume, the lead dust clearance of this device is high, desulfuration efficiency good, continual and steady operation, operating cost are lower, has solved the problem that the leaded sulfur content of flue gas, desulfurated plaster lead tolerance exceed standard.
Containing a desulfation dust-extraction device for lead fume, described device be take desulfurizing tower as main body, includes smoke inlet, fiber braiding layer, lead dust storage silo, all air chamber, booster fan, single filter layer, slurries shower nozzle, steam-water separator, electric cleaner, air-introduced machine, chimney, cascade filtration layer, circulating pump and slurries circulatory pool, wherein:
The lower left of described desulfurizing tower is described smoke inlet, between described smoke inlet and the tower body of described desulfurizing tower, is provided with dirt pocket, at described dirt pocket, is embedded with three layers of fiber braiding layer, and the below of described dirt pocket is for collecting the lead dust storage silo of lead dust;
High-temperature flue gas after secondary lead smelting enters described equal air chamber after described dirt pocket dedusting, the below of described equal air chamber is provided with described cascade filtration layer, and be provided with up described single filter layer, between described equal air chamber and described single filter layer, be provided with the described booster fan for increasing flue gas flow rate;
Above described single filter layer, be the desulfurization reaction zone of described desulfurizing tower, at tower body, be fixed wtih homodisperse described slurries shower nozzle around, described slurries shower nozzle sprays lime slurry at a certain angle obliquely;
The top of described desulfurization reaction zone is provided with described steam-water separator and described electric cleaner, for separating of leaded steam with the molecule of electric charge;
The tower body bottom of described desulfurizing tower is connected with described slurries circulatory pool, slurries in described slurries circulatory pool are sent in described desulfurization reaction zone via described circulating pump, the tower body top exhanst gas outlet of described desulfurizing tower is connected with described chimney, and the flue gas after desulfurization deleading is processed enters atmosphere via described air-introduced machine.
The number of plies of described fiber braiding layer can increase and decrease according to actual conditions.
The angle of inclination of described fiber braiding layer in described dirt pocket is 30-45 °.
The quantity of described slurries shower nozzle is set according to the amount of smoke treatment, and the spray angle of described slurries shower nozzle is 60-75 °.
Described electric cleaner adopts two-region pole plate type electrostatic dust remover.
Containing a desulfurization and dust-removal method for lead fume, described method comprises dedusting, desulfurization, filtration and separated Four processes, wherein:
In described dust removal process, high-temperature flue gas after secondary lead smelting enters into via the smoke inlet of desulfurizing tower the dirt pocket being comprised of three layers of fiber braiding layer, during the described fiber braiding layer of described high-temperature flue gas process, leaded soot dust granule is effectively tackled, and falls into the lead dust storage silo of bottom;
In described sweetening process, flue gas after dust removal process enters equal air chamber, under the effect of booster fan, upwards flow, the circulating pump of slurries circulatory pool top is started working simultaneously, the saturated lime slurry preparing in described slurries circulatory pool is sent into described desulfurizing tower, in described desulfurizing tower, there is the slurries shower nozzle being dispersed on tower body, described slurries shower nozzle is inclined upwardly with certain angle and the desulfurization reaction zone in described desulfurizing tower continues the described saturated lime slurry of ejection, the falling of scattering after peaking of described saturated lime slurry, and contact with the slurries of new ejection, constantly form new absorption interface, fully with the flue gas haptoreaction making progress after the described dust removal process flowing, realizing desulfurization processes,
In described filter process, the flue gas after dust removal process, after described equal air chamber evenly mixes, first filters through single filter layer, absorbs leaded flue dust remaining in described flue gas, then enters described desulfurizing tower and carry out desulphurization reaction; In described desulfurizing tower, and the lime slurry after the abundant haptoreaction of the flue gas after described dust removal process continues to flow downward, and will pass through cascade filtration layer, to remove the leaded flue dust that enters lime slurry before entering described slurries circulatory pool;
In described separation process, utilize steam-water separator and electric cleaner by the steam droplet containing in the flue gas after desulfurization is processed and remove with the granule of electric charge.
Described fiber braiding layer embeds in described dirt pocket with certain angle of inclination, after leaded soot dust granule is blocked, is gathered on described fiber braiding layer, falls into subsequently the lead dust storage silo of bottom.
As seen from the above technical solution provided by the invention, this device be take desulfurizing tower as main body, include smoke inlet, fiber braiding layer, lead dust storage silo, equal air chamber, booster fan, single filter layer, slurries shower nozzle, steam-water separator, electric cleaner, air-introduced machine, chimney, cascade filtration layer, circulating pump and slurries circulatory pool, the lead dust clearance of this device is high, desulfuration efficiency good, continual and steady operation, operating cost are lower, has solved the problem that the leaded sulfur content of flue gas, desulfurated plaster lead tolerance exceed standard.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain other accompanying drawings according to these accompanying drawings.
The structural representation of the leaded desulfurating dust removing device for flue gas that Fig. 1 provides for the embodiment of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to protection scope of the present invention.
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail, be illustrated in figure 1 the structural representation of the leaded desulfurating dust removing device for flue gas that the embodiment of the present invention provides, described in figure, device be take desulfurizing tower as main body, include smoke inlet 1, fiber braiding layer 2, lead dust storage silo 3, all air chamber 4, booster fan 5, single filter layer 6, slurries shower nozzle 7, steam-water separator 8, electric cleaner 9, air-introduced machine 10, chimney 11, cascade filtration layer 12, circulating pump 13 and slurries circulatory pool 14, wherein each several part annexation is:
The lower left of desulfurizing tower is described smoke inlet 1, between described smoke inlet 1 and the tower body of described desulfurizing tower, is provided with dirt pocket, at described dirt pocket, is embedded with three layers of fiber braiding layer 2, and the below of described dirt pocket is for collecting the lead dust storage silo 3 of lead dust;
High-temperature flue gas after secondary lead smelting enters described equal air chamber 4 after described dirt pocket dedusting, the below of described equal air chamber 4 is provided with described cascade filtration layer 12, and be provided with up described single filter layer 6, between described equal air chamber 4 and described single filter layer 6, be provided with the described booster fan 5 for increasing flue gas flow rate;
It above described single filter layer 6, is the desulfurization reaction zone of described desulfurizing tower, at tower body, be fixed wtih homodisperse described slurries shower nozzle 7 around, described slurries shower nozzle 7 sprays lime slurry at a certain angle obliquely, to extend the time of staying of slurries in desulfurizing tower;
The top of described desulfurization reaction zone is provided with described steam-water separator 8 and described electric cleaner 9, for separating of leaded steam with the molecule of electric charge;
The tower body bottom of described desulfurizing tower is connected with described slurries circulatory pool 14, slurries in described slurries circulatory pool 14 are sent in described desulfurization reaction zone via described circulating pump 13, the tower body top exhanst gas outlet of described desulfurizing tower is connected with described chimney 11, and the flue gas after desulfurization deleading is processed enters atmosphere via described air-introduced machine 10.
In specific implementation process, described fiber braiding layer 2 also available other materials replaces, and the number of plies can increase and decrease according to actual conditions, and this fiber braiding layer 2 angle of inclination in described dirt pocket is 30-45 °
The material of above-mentioned desulfurizing tower and related accessory can be 316L stainless steel.
The quantity of described slurries shower nozzle 7 can be set according to the amount of smoke treatment, and can change, and the spray angle of described slurries shower nozzle 7 is 60-75 °.
In addition, in filter process, single filter layer 6 and cascade filtration layer 12 can be changed at any time after inefficacy; Electric cleaner 9 can adopt two-region pole plate type electrostatic dust remover.
Device based on above-mentioned, the embodiment of the present invention also provides a kind of desulfurization and dust-removal method containing lead fume, and described method comprises dedusting, desulfurization, filtration and separated Four processes, wherein:
In described dust removal process, high-temperature flue gas after secondary lead smelting enters into via the smoke inlet of desulfurizing tower the dirt pocket being comprised of three layers of fiber braiding layer, during the described fiber braiding layer of described high-temperature flue gas process, leaded soot dust granule is effectively tackled, and fall into the lead dust storage silo of bottom, be stacked into and to a certain degree send into afterwards smelting furnace and carry out melting;
In described sweetening process, flue gas after dust removal process enters equal air chamber, under the effect of booster fan, upwards flow, the circulating pump of slurries circulatory pool top is started working simultaneously, the saturated lime slurry preparing in described slurries circulatory pool is sent into described desulfurizing tower, in described desulfurizing tower, there is the slurries shower nozzle being dispersed on tower body, described slurries shower nozzle is inclined upwardly with certain angle and the desulfurization reaction zone in described desulfurizing tower continues the described saturated lime slurry of ejection, the falling of scattering after peaking of described saturated lime slurry, and contact with the slurries of new ejection, constantly form new absorption interface, fully with the described flue gas haptoreaction upwards flowing, realizing desulfurization processes, the desulfuration efficiency of this sweetening process reaches more than 98%, here the slurry nozzle of unique design and spray angle have extended the time of staying of slurries in tower body, and this desulfurizing tower tower body hollow, resistance is less, the possibility that produces obstruction and fouling is more much smaller than the desulfurizing tower of other types,
In described filter process, the flue gas after dust removal process, after described equal air chamber evenly mixes, first filters through single filter layer, absorbs leaded flue dust remaining in the flue gas after described dust removal process, then enters described desulfurizing tower and carry out desulphurization reaction; In described desulfurizing tower, and the lime slurry after the abundant haptoreaction of the flue gas after described dust removal process continues to flow downward, and will pass through cascade filtration layer, to remove the leaded flue dust that enters lime slurry before entering described slurries circulatory pool; Like this after double-filtration, can guarantee that in desulfurated plaster, the lead dust content in lead content and flue gas is extremely low;
In described separation process, flue gas after desulfurization is processed can be taken a large amount of steam droplets and some granules with electric charge out of, can utilize steam-water separator and electric cleaner by the steam droplet containing in the flue gas after desulfurization is processed and remove with the granule of electric charge, leaded hardly to guarantee in the flue gas after processing.
In addition, in specific implementation, above-mentioned fiber braiding layer embeds in described dirt pocket with certain angle of inclination, once find can change at any time after fiber braiding layer breakage, guarantees that flue gas ash removal rate is more than 98%; And leaded soot dust granule is gathered in after being blocked on described fiber braiding layer, fall into subsequently the lead dust storage silo of bottom.
In sum, the embodiment of the present invention provides desulfation dust-extraction device and method containing lead fume have following features:
1) the flue gas lead tolerance after apparatus of the present invention are processed is lower than 0.3mg/m
3, SO
2concentration is lower than 40ml/m
3;
2) in conjunction with flue gas ash removal and flue gas desulfurization course, set rational desulfurization and dust-removal method, desulfurization and dedusting is incorporated on a kind of device, reduced early investment and occupation area of equipment;
3) special slurries sprinkler design in desulfurizing tower, even if make slurries shower nozzle damage also and can not affect smoke desulfurization efficiency to some extent, guarantee the continual and steady operation of desulfurizing tower, and maintenance is convenient;
4) in desulfurizing tower, arranging of double-filtration layer guaranteed the lead dust clearance in flue gas, and the by-produced gypsum after desulfurization can effectively be recycled;
5) introducing of electric cleaner has guaranteed to enter atmospheric flue gas and has contained hardly molecule, solves the problem that flue gas lead tolerance exceeds standard.
The above; be only the present invention's specific embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (7)
1. containing a desulfation dust-extraction device for lead fume, it is characterized in that, described device be take desulfurizing tower as main body, include smoke inlet, fiber braiding layer, lead dust storage silo, equal air chamber, booster fan, single filter layer, slurries shower nozzle, steam-water separator, electric cleaner, air-introduced machine, chimney, cascade filtration layer, circulating pump and slurries circulatory pool, wherein:
The lower left of described desulfurizing tower is described smoke inlet, between described smoke inlet and the tower body of described desulfurizing tower, is provided with dirt pocket, at described dirt pocket, is embedded with three layers of fiber braiding layer, and the below of described dirt pocket is for collecting the lead dust storage silo of lead dust;
High-temperature flue gas after secondary lead smelting enters described equal air chamber after described dirt pocket dedusting, the below of described equal air chamber is provided with described cascade filtration layer, and be provided with up described single filter layer, between described equal air chamber and described single filter layer, be provided with the described booster fan for increasing flue gas flow rate;
Above described single filter layer, be the desulfurization reaction zone of described desulfurizing tower, at tower body, be fixed wtih homodisperse described slurries shower nozzle around, described slurries shower nozzle sprays lime slurry at a certain angle obliquely;
The top of described desulfurization reaction zone is provided with described steam-water separator and described electric cleaner, for separating of leaded steam with the molecule of electric charge;
The tower body bottom of described desulfurizing tower is connected with described slurries circulatory pool, slurries in described slurries circulatory pool are sent in described desulfurization reaction zone via described circulating pump, the tower body top exhanst gas outlet of described desulfurizing tower is connected with described chimney, and the flue gas after desulfurization deleading is processed enters atmosphere via described air-introduced machine.
2. according to claim 1 containing the desulfation dust-extraction device of lead fume, it is characterized in that,
The number of plies of described fiber braiding layer can increase and decrease according to actual conditions.
3. according to claim 1 containing the desulfation dust-extraction device of lead fume, it is characterized in that,
The angle of inclination of described fiber braiding layer in described dirt pocket is 30-45 °.
4. according to claim 1 containing the desulfation dust-extraction device of lead fume, it is characterized in that,
The quantity of described slurries shower nozzle is set according to the amount of smoke treatment, and the spray angle of described slurries shower nozzle is 60-75 °.
5. according to claim 1 containing the desulfation dust-extraction device of lead fume, it is characterized in that,
Described electric cleaner adopts two-region pole plate type electrostatic dust remover.
6. containing a desulfurization and dust-removal method for lead fume, it is characterized in that, described method comprises dedusting, desulfurization, filtration and separated Four processes, wherein:
In described dust removal process, high-temperature flue gas after secondary lead smelting enters into via the smoke inlet of desulfurizing tower the dirt pocket being comprised of three layers of fiber braiding layer, during the described fiber braiding layer of described high-temperature flue gas process, leaded soot dust granule is effectively tackled, and falls into the lead dust storage silo of bottom;
In described sweetening process, flue gas after dust removal process enters equal air chamber, under the effect of booster fan, upwards flow, the circulating pump of slurries circulatory pool top is started working simultaneously, the saturated lime slurry preparing in described slurries circulatory pool is sent into described desulfurizing tower, in described desulfurizing tower, there is the slurries shower nozzle being dispersed on tower body, described slurries shower nozzle is inclined upwardly with certain angle and the desulfurization reaction zone in described desulfurizing tower continues the described saturated lime slurry of ejection, the falling of scattering after peaking of described saturated lime slurry, and contact with the slurries of new ejection, constantly form new absorption interface, fully with the flue gas haptoreaction making progress after the described dust removal process flowing, realizing desulfurization processes,
In described filter process, the flue gas after dust removal process, after described equal air chamber evenly mixes, first filters through single filter layer, absorbs leaded flue dust remaining in described flue gas, then enters described desulfurizing tower and carry out desulphurization reaction; In described desulfurizing tower, and the lime slurry after the abundant haptoreaction of the flue gas after described dust removal process continues to flow downward, and will pass through cascade filtration layer, to remove the leaded flue dust that enters lime slurry before entering described slurries circulatory pool;
In described separation process, utilize steam-water separator and electric cleaner by the steam droplet containing in the flue gas after desulfurization is processed and remove with the granule of electric charge.
7. the desulfurization and dust-removal method containing lead fume as claimed in claim 6, it is characterized in that, described fiber braiding layer embeds in described dirt pocket with certain angle of inclination, after leaded soot dust granule is blocked, is gathered on described fiber braiding layer, falls into subsequently the lead dust storage silo of bottom.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104500286A (en) * | 2014-12-25 | 2015-04-08 | 雷同飞 | Efficient air filter |
| CN105833709A (en) * | 2016-04-29 | 2016-08-10 | 东莞市恒升环保科技有限公司 | Gas desulfuration device and desulfuration method |
| CN105879582A (en) * | 2016-06-16 | 2016-08-24 | 山西北极熊环境科技有限公司 | Multi-pollutant treatment device and method for carbon dioxide capturing |
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| JPS6197014A (en) * | 1984-10-17 | 1986-05-15 | エスケ−エフ ステイ−ル エンジニアリング アクテイエボラ−グ | Method and apparatus for cooling gas and removing dust from gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105833709A (en) * | 2016-04-29 | 2016-08-10 | 东莞市恒升环保科技有限公司 | Gas desulfuration device and desulfuration method |
| CN105879582A (en) * | 2016-06-16 | 2016-08-24 | 山西北极熊环境科技有限公司 | Multi-pollutant treatment device and method for carbon dioxide capturing |
| CN105879582B (en) * | 2016-06-16 | 2019-08-02 | 山西北极熊环境科技有限公司 | A kind of multi-pollutant abatement equipment and method for collecting carbonic anhydride |
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| CN103585847B (en) | 2015-08-19 |
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