CN103585847B - A kind of desulfation dust-extraction device containing lead fume and method - Google Patents
A kind of desulfation dust-extraction device containing lead fume and method Download PDFInfo
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- CN103585847B CN103585847B CN201310574383.9A CN201310574383A CN103585847B CN 103585847 B CN103585847 B CN 103585847B CN 201310574383 A CN201310574383 A CN 201310574383A CN 103585847 B CN103585847 B CN 103585847B
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Abstract
The embodiment of the invention discloses a kind of desulfation dust-extraction device containing lead fume and method.This device, based on desulfurizing tower, includes 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 serum recycle pond, the lead dust clearance of this device is high, desulfuration efficiency good, continual and steady operation, operating cost are lower, solves the leaded sulfur content of flue gas, problem that desulfurated plaster lead tolerance exceeds standard.
Description
Technical field
The present invention relates to environmental protection technical field, particularly relate to a kind of desulfation dust-extraction device containing lead fume and method.
Background technology
Lead is a kind of than great (11.34), and the silver gray metal of fusing point low (327.1 DEG C), as a kind of extremely harmful heavy metal element, lead generally passes through respiratory tract, alimentary canal enters body, almost all causes damage to all organs, to the body development of children and Intelligence the most serious; SO
2be a kind of colourless gas with intense stimulus smell, the soluble blood in human body and other stickiness liquid, body immunity is declined, and resistance against diseases dies down, the SO in air
2respiratory inflammation, bronchitis, pulmonary emphysema, eye conjunctivitis disease etc. can be caused.According to the productive prospecting of enterprise of regeneration factory, a large amount of high-temperature dust-containing flue gas can be produced in secondary lead smelting process, generally enter in air after high temperature utilization, bag-type dust and wet desulphurization, but due to sack cleaner dust removing effects undesirable, a large amount of leaded flue dust is caused to enter desulphurization system with flue gas, the lead content of byproduct desulfurated plaster is exceeded standard, can only hazardous waste disposal be treated as, cannot utilize further.Meanwhile, due to problems such as the desulphurization system used now are generally Pneumatic emulsifying system or spray system, and fluctuation of service, easily occurs pipeline scale, blocking, desulfuration efficiency is unsatisfactory, and flue gas sulfur content is easy to exceed standard; Flue gas after desulfurization can take the leaded droplet of a part of sulfur-bearing out of in addition, the leaded sulfur content of flue gas entering air also can be made to exceed standard, if do not solve, can make an extremely bad impression to human body and environment.
In prior art, leaded sulphur-containing exhaust gas processing method is generally separately carried out dust removal process and sweetening process, namely 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 condition that operation is suitable, three class methods all can reach higher efficiency of dust collection, but electrostatic method easily causes reentrainment of dust, after pole plate dust thickness exceedes allowed band, efficiency of dust collection declines to a great extent; Filtration method is for bag-type dust, and after running a period of time, because of filter bag damage, the reasons such as the system failure, the efficiency of bag-type dust is unsatisfactory, and use the method for sack cleaner series connection, although efficiency of dust collection can reach more than 99%, invest too high, utilization rate of equipment and installations is low.Absorption process is for bubble tower, and desulfurization and dedusting two processes because of process integration for this reason, although it is large to avoid energy consumption, 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 the standard reaching high-efficiency desulfurization, present flue gas desulfurization mainly uses wet desulphurization, the capital equipment of different wet desulfurizing process is desulfurizing tower, essential difference is structure and the form of desulfurizing tower, the desulfurizing tower that present stage is applied mainly contains packed tower, bubble tower, spray column, wherein packed tower is early stage desulfurization turriform, due to corrosion, wearing and tearing, the problems such as blocking are serious, system cannot steady in a long-termly be run, bubble tower floor space is large, and byproduct desulfurated plaster lead tolerance is high, is difficult to process, spray column has a large amount of slurry droplet when running and enters air with flue gas, and flue gas lead tolerance is easy to exceed standard.Therefore design science, efficiently flue-gas dust-removing and desulfurization device and method, meeting relevant criterion with the leaded sulfur content of flue gas after ensureing flue-gas dust-removing and desulfurization, desulfurated plaster lead tolerance has been extremely urgent thing.
Summary of the invention
The object of this invention is to provide a kind of desulfation dust-extraction device containing lead fume and method, the lead dust clearance of this device is high, desulfuration efficiency good, continual and steady operation, operating cost are lower, solves the leaded sulfur content of flue gas, problem that desulfurated plaster lead tolerance exceeds standard.
Containing a desulfation dust-extraction device for lead fume, described device, based on desulfurizing tower, includes 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 serum recycle pond, wherein:
The lower left of described desulfurizing tower is described smoke inlet, is provided with dirt pocket between the tower body of described smoke inlet and described desulfurizing tower, is embedded with three layers of fiber braiding layer at described dirt pocket, and the below of described dirt pocket is the lead dust storage silo of collecting 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 described single filter layer up, be provided with the described booster fan for increasing flue gas flow rate between described equal air chamber and described single filter layer;
Be the desulfurization reaction zone of described desulfurizing tower above described single filter layer, around tower body, be fixed wtih homodisperse described slurries shower nozzle, 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 and the molecule with electric charge;
Be connected with described serum recycle pond bottom the tower body of described desulfurizing tower, slurries in described serum recycle pond 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 the process of desulfurization deleading enters air 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 sets 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 is 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 be made up of three layers of fiber braiding layer, described high-temperature flue gas is through described fiber braiding layer, and 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, upwards flow under the effect of booster fan, circulating pump simultaneously above serum recycle pond is started working, the saturated lime slurry prepared in described serum recycle pond is sent into described desulfurizing tower, the slurries shower nozzle be dispersed on tower body is had in described desulfurizing tower, described slurries shower nozzle is inclined upwardly with certain angle and continues the described saturated lime slurry of ejection to the desulfurization reaction zone in described desulfurizing tower, described saturated lime slurry scatters falling after peaking, and with the slurry liquid contacts newly sprayed, the absorption interface that continuous formation is new, smoke contacts after the described dust removal process flowed fully and upwards reacts, realize desulfurization process,
In described filter process, the flue gas after dust removal process, after described equal air chamber Homogeneous phase mixing, first filters through single filter layer, to absorb in described flue gas remaining leaded flue dust, then enters described desulfurizing tower and carry out desulphurization reaction; In described desulfurizing tower, and the lime slurry after the abundant haptoreaction of flue gas after described dust removal process continues to flow downward, will by cascade filtration layer before entering described serum recycle pond, to remove the leaded flue dust entering lime slurry;
In described separation process, steam-water separator and electric cleaner is utilized to remove by the steam droplet contained in the flue gas after desulfurization process with the granule of electric charge.
Described fiber braiding layer embeds in described dirt pocket with certain angle of inclination, is gathered on described fiber braiding layer after leaded soot dust granule is blocked, and falls into the lead dust storage silo of bottom subsequently.
As seen from the above technical solution provided by the invention, this device is based on desulfurizing tower, 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 serum recycle pond, the lead dust clearance of this device is high, desulfuration efficiency good, continual and steady operation, operating cost are lower, solves the leaded sulfur content of flue gas, problem that desulfurated plaster lead tolerance exceeds 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 used required in describing embodiment 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, under the prerequisite not paying creative work, other accompanying drawings can also be obtained 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.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art, not making the every other embodiment obtained 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 is based on desulfurizing tower, include smoke inlet 1, fiber braiding layer 2, lead dust storage silo 3, equal 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 serum recycle pond 14, wherein each several part annexation is:
The lower left of desulfurizing tower is described smoke inlet 1, is provided with dirt pocket, is embedded with three layers of fiber braiding layer 2 at described dirt pocket between described smoke inlet 1 and the tower body of described desulfurizing tower, and the below of described dirt pocket is the lead dust storage silo 3 of collecting 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 described single filter layer 6 up, be provided with the described booster fan 5 for increasing flue gas flow rate between described equal air chamber 4 and described single filter layer 6;
It is the desulfurization reaction zone of described desulfurizing tower above described single filter layer 6, homodisperse described slurries shower nozzle 7 is fixed wtih around tower body, 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 and the molecule with electric charge;
Be connected with described serum recycle pond 14 bottom the tower body of described desulfurizing tower, slurries in described serum recycle pond 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 the process of desulfurization deleading enters air 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 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.
Based on above-mentioned device, the embodiment of the present invention additionally provides a kind of desulfurization and dust-removal method containing lead fume, and described method comprises dedusting, desulfurization, filtration and is 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 be made up of three layers of fiber braiding layer, described high-temperature flue gas is through described fiber braiding layer, leaded soot dust granule is effectively tackled, and fall into the lead dust storage silo of bottom, be stacked into a certain degree feeding smelting furnace afterwards and carry out melting;
In described sweetening process, flue gas after dust removal process enters equal air chamber, upwards flow under the effect of booster fan, circulating pump simultaneously above serum recycle pond is started working, the saturated lime slurry prepared in described serum recycle pond is sent into described desulfurizing tower, the slurries shower nozzle be dispersed on tower body is had in described desulfurizing tower, described slurries shower nozzle is inclined upwardly with certain angle and continues the described saturated lime slurry of ejection to the desulfurization reaction zone in described desulfurizing tower, described saturated lime slurry scatters falling after peaking, and with the slurry liquid contacts newly sprayed, the absorption interface that continuous formation is new, react with the described smoke contacts upwards flowed fully, realize desulfurization process, the desulfuration efficiency of this sweetening process reaches more than 98%, here the slurry nozzle of unique design and spray angle extend the time of staying of slurries in tower body, and this desulfurizing tower tower body hollow, resistance is less, the possibility producing blocking 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 Homogeneous phase mixing, first filters through single filter layer, to absorb in the flue gas after described dust removal process remaining leaded flue dust, then enters described desulfurizing tower and carry out desulphurization reaction; In described desulfurizing tower, and the lime slurry after the abundant haptoreaction of flue gas after described dust removal process continues to flow downward, will by cascade filtration layer before entering described serum recycle pond, to remove the leaded flue dust entering lime slurry; Like this after double-filtration, can ensure that the lead dust content in desulfurated plaster in lead content and flue gas is extremely low;
In described separation process, flue gas after desulfurization process can take a large amount of steam droplets and some granules with electric charge out of, steam-water separator and electric cleaner can be utilized to remove by the steam droplet contained in the flue gas after desulfurization process with the granule of electric charge, leaded hardly to ensure 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 can change at any time after finding fiber braiding layer breakage, ensures 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 the lead dust storage silo of bottom subsequently.
In sum, what the embodiment of the present invention provided has following features containing the desulfation dust-extraction device of lead fume and method:
1) the flue gas lead tolerance after apparatus of the present invention process 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, decrease early investment and occupation area of equipment;
3) special in desulfurizing tower slurries sprinkler design, even if make slurries shower nozzle damage to some extent also can not affect smoke desulfurization efficiency, ensure the operation that desulfurizing tower is continual and steady, and maintenance is convenient;
4) in desulfurizing tower, the setting of double-filtration layer ensure that the lead dust clearance in flue gas, and the by-produced gypsum after desulfurization can effectively be recycled;
5) introducing of electric cleaner ensure that and enters atmospheric flue gas hardly containing molecule, solves the problem that flue gas lead tolerance exceeds standard.
The above; be only the present invention's preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within 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. the desulfation dust-extraction device containing lead fume, comprise desulfurizing tower, smoke inlet, all air chamber, slurries shower nozzle, steam-water separator and chimney, it is characterized in that, described device also comprises fiber braiding layer, lead dust storage silo, booster fan, single filter layer, electric cleaner, air-introduced machine, cascade filtration layer, circulating pump and serum recycle pond, wherein:
The lower left of described desulfurizing tower is described smoke inlet, is provided with dirt pocket between the tower body of described smoke inlet and described desulfurizing tower, is embedded with three layers of fiber braiding layer at described dirt pocket, and the below of described dirt pocket is the lead dust storage silo of collecting 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 described single filter layer up, be provided with the described booster fan for increasing flue gas flow rate between described equal air chamber and described single filter layer;
Be the desulfurization reaction zone of described desulfurizing tower above described single filter layer, around tower body, be fixed wtih homodisperse described slurries shower nozzle, 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 and the molecule with electric charge;
Be connected with described serum recycle pond bottom the tower body of described desulfurizing tower, slurries in described serum recycle pond 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 the process of desulfurization deleading enters air 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 sets 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 is 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 be made up of three layers of fiber braiding layer, described high-temperature flue gas is through described fiber braiding layer, and 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, upwards flow under the effect of booster fan, circulating pump simultaneously above serum recycle pond is started working, the saturated lime slurry prepared in described serum recycle pond is sent into described desulfurizing tower, the slurries shower nozzle be dispersed on tower body is had in described desulfurizing tower, described slurries shower nozzle is inclined upwardly with certain angle and continues the described saturated lime slurry of ejection to the desulfurization reaction zone in described desulfurizing tower, described saturated lime slurry scatters falling after peaking, and with the slurry liquid contacts newly sprayed, the absorption interface that continuous formation is new, smoke contacts after the described dust removal process flowed fully and upwards reacts, realize desulfurization process,
In described filter process, the flue gas after dust removal process, after described equal air chamber Homogeneous phase mixing, first filters through single filter layer, to absorb in described flue gas remaining leaded flue dust, then enters described desulfurizing tower and carry out desulphurization reaction; In described desulfurizing tower, and the lime slurry after the abundant haptoreaction of flue gas after described dust removal process continues to flow downward, will by cascade filtration layer before entering described serum recycle pond, to remove the leaded flue dust entering lime slurry;
In described separation process, steam-water separator and electric cleaner is utilized to remove by the steam droplet contained in the flue gas after desulfurization process 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, is gathered on described fiber braiding layer after leaded soot dust granule is blocked, and falls into the lead dust storage silo of bottom subsequently.
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| CN104500286B (en) * | 2014-12-25 | 2017-10-10 | 西京学院 | A kind of efficient air cleaner |
| 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 |
| 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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| CN202052447U (en) * | 2011-05-16 | 2011-11-30 | 福建泉州赛特电源科技有限公司 | Lead dust/lead smoke purifier |
| CN102626577A (en) * | 2012-04-09 | 2012-08-08 | 重庆大学 | Method and system for removing inhalable particles |
| CN102974188A (en) * | 2012-12-11 | 2013-03-20 | 中国瑞林工程技术有限公司 | Device and method for processing high temperature selenium-containing flue gas |
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| SE454327B (en) * | 1984-10-17 | 1988-04-25 | Skf Steel Eng Ab | KIT AND INSTALLATION FOR COOLING AND PURIFICATION OF GAS FROM DUST |
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| CN202052447U (en) * | 2011-05-16 | 2011-11-30 | 福建泉州赛特电源科技有限公司 | Lead dust/lead smoke purifier |
| CN102626577A (en) * | 2012-04-09 | 2012-08-08 | 重庆大学 | Method and system for removing inhalable particles |
| CN102974188A (en) * | 2012-12-11 | 2013-03-20 | 中国瑞林工程技术有限公司 | Device and method for processing high temperature selenium-containing flue gas |
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