CN101732971A - Sintering smoke purifying method - Google Patents
Sintering smoke purifying method Download PDFInfo
- Publication number
- CN101732971A CN101732971A CN 201010100756 CN201010100756A CN101732971A CN 101732971 A CN101732971 A CN 101732971A CN 201010100756 CN201010100756 CN 201010100756 CN 201010100756 A CN201010100756 A CN 201010100756A CN 101732971 A CN101732971 A CN 101732971A
- Authority
- CN
- China
- Prior art keywords
- dust
- gas
- dust collector
- pulse bag
- desulfurizing tower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Treating Waste Gases (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention relates to a sintering smoke purifying method comprising the following steps: sintering smoke passes through a desulfurizing tower to remove 70-80% of contained SO2 gas; then smoke enters a pulse bag dust remover to filter and remove most dust and harmful substance; 8-10% of SO2 gas is removed to finally obtain clean gas which is discharged into air via a sintering main fan; dust in the pulse bag dust remover contains parts of desulfurizing agent which does not totally react, so that desulfurizing agent can return back to the desulfurizing tower to use continuously. Compared with the prior art, the flow of the invention is half of that of the prior art, the investment is lowered by about 50%, the maintenance workload is greatly lowered, the operation energy consumption is lowered by above 40%, externally-discharged dust density of the deduster is less than or equal to 10 mg/ Nm3, and desulfurizing efficiency is 80-90%; and meanwhile, the invention also can remove most harmful substances in sintering smoke, such as HCl, NOx, HF, heavy metal, dioxin and the like.
Description
Technical field
The present invention relates to a kind of industrial smoke purifying, especially relate to a kind of purification method of sinter fume.
Background technology
Sintering is an important step in the smelting iron and steel flow process, is the various iron-smelting raw materials that can not directly enter blast furnace are heated to 1300～1500 ℃, makes material sinter bulk into.Produce a large amount of ash-laden gas in the sintering process, major pollutants are dust and SO in the flue gas
2, the about 0.5～15g/Nm of dust concentration
3, SO
2About 600～the 2000mg/Nm of concentration
3, water content (volume ratio) is about 10%, also contains harmful substances such as pernicious gases such as small amount of H Cl, NOx, HF and heavy metal, bioxin, about 100～180 ℃ of flue-gas temperature.The SO that produces in the sintering process
2Account for 40～60% of whole steel smelting procedure.
At present in the world electrostatic precipitator is all mainly adopted in the improvement of sintering flue dust, its advantage is that the deduster pressure loss is little, and operating cost is lower, and Maintenance and Repair are simpler, but its shortcoming is the efficiency of dust collection instability, and concentration of emission often surpasses national standard 120mg/Nm
3, and along with the progressively strict of environmental protection standard (required sintering discharging dust concentration≤50mg/Nm as being about to tentative national standard
3), electrostatic precipitator has been difficult to adapt to new requirement.The pulse bag-type dust-removing technology has obtained considerable technological achievement and use experience through years of development, and its great advantage is that efficiency of dust collection is high and stable, and its concentration of emission can stably be controlled at 10mg/Nm
3Below, and resistance can be controlled in 500～600Pa (suitable with electrostatic precipitator), its filter element only is a filter bag, life-span of the filter bag can reach 3 years, and change bag than electrostatic precipitator change pole plate, polar curve is convenient.
For SO
2Improvement, all transplant the relevant desulfur technology of coal-burning boiler at present in the world, the desulfurizer of behind the sintering main air blower, connecting.To so far, the domestic desulfur technologies such as wet method, semidry method and dry method that adopted are applied to nearly ten sintering machines, and desulfuration efficiency is about 80～95%, can reach environmental requirement substantially.But the desulfurizer of connecting behind the sintering main air blower is long from the dedusting to the desulfurization process, the energy consumption height, and the Maintenance and Repair workload is big, the operating cost height.
Summary of the invention
Purpose of the present invention is exactly the purification method that the sinter fume that a kind of technological process is short, cost is lower, energy consumption is less is provided for the defective that overcomes above-mentioned prior art existence.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of purification method of sinter fume is characterized in that, this method may further comprise the steps: sinter fume is removed wherein contained SO through desulfurizing tower
2The 70-80% of gas, flue gas enters pulse bag type dust collector then, removes by filter most of dust, harmful substance, and removes the SO of 8-10% again
2Gas, the clean gas that finally obtains enters atmosphere through the sintering main air blower, contains the not desulfurizing agent of complete reaction of part in the dust that pulse bag type dust collector is collected, and therefore can return desulfurizing tower and continue to use.Compared with prior art, the present invention shortens half than prior art, and investment descends about 50%, and maintenance workload descends greatly, and operation energy consumption descends more than 40%, and deduster effluxes dust concentration≤10mg/Nm
3, desulfuration efficiency 80-90% also can remove most HCl, NO in the flue gas simultaneously
x, HF, heavy metal be Ji harmful substances such as bioxin.
Described desulfurizing tower adopts recirculating fluidized bed, and the desulfurizing agent that desulfurizing tower uses is basic anhydride, and is wetting through atomized water spray.
Described pulse bag type dust collector is made up of deashing device, upper box, air outlet, middle casing, card, filter bag, deflector, air inlet and ash bucket etc., described deashing device is located in the upper box, described air outlet is located at a side of upper box, casing is connected with upper box by card in described, described filter bag is located in the middle casing, described deflector is located at a side of filter bag, and described air inlet is located at ash bucket top, and described ash bucket is located at the bottom of this deduster.
The pulse valve employing patent No. in the described deashing device is that the patent of ZL200720074665.2 is made, and winding-up pipe employing application number is 200810033951.3 patent making.
The wind speed of described air inlet and air outlet is 5-6m/s.
Described deflector guiding dust-contained airflow flows downward, and crude particle dust wherein falls into ash bucket, and the air-flow of removing crude particle dust then is folded to and enters the filter bag filtration uniformly.
Compared with prior art, technological process of the present invention is shortened half than prior art flow process, and investment descends about 50%, and maintenance workload descends greatly, and operation energy consumption descends more than 40%, and deduster effluxes dust concentration≤10mg/Nm
3, desulfuration efficiency 80-90% also can remove most HCl, NO in the sinter fume simultaneously
x, HF, heavy metal be Ji harmful substances such as bioxin.
Description of drawings
Fig. 1 is a process chart of the present invention;
Fig. 2 is the structural representation of pulse bag type dust collector;
Fig. 3 is the structural representation of deashing device.
1 is that deashing device, 2 is that upper box, 3 is that card, 4 is that filter bag, 5 is that deflector, 6 is that middle casing, 7 is that ash bucket, 8 is that air inlet, 9 is that air outlet, 10 is that pulse valve, 11 is that gas bag, 12 is to jet to manage among the figure.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment
A kind of purification method of sinter fume, its flow process as shown in Figure 1, this method may further comprise the steps: contain SO
2The sinter fume of gas, sintering dust and harmful substance HCl gas, HF gas, nitride, heavy metal lead, manganese and bioxin is removed wherein contained SO through behind the desulfurizing tower
2Gas about 80%, this desulfurizing tower adopts recirculating fluidized bed, and the desulfurizing agent that desulfurizing tower uses is calcium oxide, and is wetting through atomized water spray.The flue gas that comes out from desulfurizing tower enters pulse bag type dust collector, removes by filter most of dust, harmful substance HCl, HF, nitride, heavy metal lead, manganese Ji bioxin and SO
2Gas about 10% filters back dust concentration≤10mg/Nm
3, the clean gas that finally obtains enters atmosphere through the sintering main air blower, and the desulfurizing agent of the not complete reaction that contains in the dust that pulse bag type dust collector is collected can return desulfurizing tower with dust to be continued to use, and the waste material that pulse bag type dust collector obtains is removed and is got final product.
The structure of pulse bag type dust collector as shown in Figure 2, form by deashing device 1, upper box 2, card 3, filter bag 4, deflector 5, middle casing 6, ash bucket 7, air inlet 8, air outlet 9, deashing device 1 is located in the upper box 2, this deashing device 1 is that the pulse valve 10 of ZL200720074665.2 and application number are 200810033951.3 winding-up pipe 12 by the patent No. of my company invention, be connected through gas bag 11, pulse valve 10 is located at the top of gas bag 11, winding-up pipe 12 is connected with the bottom of gas bag 11, as shown in Figure 3.Adopt computer the deduster interior flow field to be carried out determining after the numerical computations again the structure and the installation site of deduster internal structure and deflector 5.Air outlet 9 is located at a side of upper box 2, and middle casing 6 is connected with upper box 2 by card 3, and in the casing 6, deflector 5 was located at a side of filter bag 4 during filter bag 4 was located at, and air inlet 8 is located at middle casing 6 bottoms, and ash bucket 7 is located at the bottom of this deduster.Deflector guiding dust-contained airflow flows downward, and crude particle dust wherein falls into ash bucket, and the air-flow of removing crude particle dust then is folded to and enters the filter bag filtration uniformly.
Claims (6)
1. the purification method of a sinter fume is characterized in that, this method may further comprise the steps: sinter fume is removed wherein contained SO through desulfurizing tower
2The 70-80% of gas, flue gas enters pulse bag type dust collector then, removes by filter most of dust, harmful substance, and removes the SO of 8-10% again
2Gas, the clean gas that finally obtains enters atmosphere through the sintering main air blower, contains the not desulfurizing agent of complete reaction of part in the dust that pulse bag type dust collector is collected, and therefore can return desulfurizing tower and continue to use.Compared with prior art, the present invention shortens half than prior art flow process, and investment descends about 50%, and maintenance workload descends greatly, and operation energy consumption descends more than 40%, and deduster effluxes dust concentration≤10mg/Nm
3, desulfuration efficiency 80-90% also can remove most HCl, NO in the flue gas simultaneously
x, HF, heavy metal be Ji harmful substances such as bioxin.
2. the purification method of a kind of sinter fume according to claim 1 is characterized in that, described desulfurizing tower adopts recirculating fluidized bed, and the desulfurizing agent that desulfurizing tower uses is basic anhydride, and is wetting through atomized water spray.
3. the purification method of a kind of sinter fume according to claim 1, it is characterized in that, described pulse bag type dust collector is by deashing device, upper box, air outlet, middle casing, card, filter bag, deflector, composition such as air inlet and ash bucket, described deashing device is located in the upper box, described air outlet is located at a side of upper box, casing is connected with upper box by card in described, described filter bag is located in the middle casing, described deflector is located at a side of filter bag, described air inlet is located at ash bucket top, and described ash bucket is located at the bottom of this deduster.
4. pulse bag type dust collector according to claim 3 is characterized in that, the pulse valve employing patent No. in the described deashing device is that the patent of ZL200720074665.2 is made, and winding-up pipe employing application number is 200810033951.3 patent making.
5. pulse bag type dust collector according to claim 3 is characterized in that, the wind speed of described air inlet and air outlet is 5-6m/s.
6. pulse bag type dust collector according to claim 3 is characterized in that, described deflector guiding dust-contained airflow flows downward, and crude particle dust wherein falls into ash bucket, and the air-flow of removing crude particle dust then is folded to and enters the filter bag filtration uniformly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010100756 CN101732971B (en) | 2010-01-25 | 2010-01-25 | Sintering smoke purifying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010100756 CN101732971B (en) | 2010-01-25 | 2010-01-25 | Sintering smoke purifying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101732971A true CN101732971A (en) | 2010-06-16 |
| CN101732971B CN101732971B (en) | 2013-08-28 |
Family
ID=42457308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010100756 Active CN101732971B (en) | 2010-01-25 | 2010-01-25 | Sintering smoke purifying method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101732971B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105757699A (en) * | 2013-01-07 | 2016-07-13 | 宋朋泽 | Dust removal purifying system and method for flue gas |
| CN108815976A (en) * | 2018-09-05 | 2018-11-16 | 安徽磐盛新型材料科技有限公司 | A kind of kiln gas dust separation system |
| CN116510452A (en) * | 2023-05-29 | 2023-08-01 | 兰溪华能输送设备制造有限公司 | Air box type pulse bag dust collector |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2413776Y (en) * | 2000-03-07 | 2001-01-10 | 朝阳市电子除尘设备厂 | Improved low-voltage pulse bag type dust remover |
| CN2813075Y (en) * | 2005-11-11 | 2006-09-06 | 中钢设备公司 | Sintering machine head smoke desulfurizing device |
| CN201081027Y (en) * | 2007-09-13 | 2008-07-02 | 上海信孚环保技术工程有限公司 | Pulse valve |
| CN101518704B (en) * | 2008-02-27 | 2011-11-23 | 上海信孚环保技术工程有限公司 | Blowing tube |
| CN101559323B (en) * | 2009-06-03 | 2011-09-14 | 周建安 | Digestive circulating fluid bed flue gas desulfurization method and device |
| CN101628200B (en) * | 2009-08-13 | 2012-09-26 | 福建龙净脱硫脱硝工程有限公司 | Desulfurization device and desulfurization method for wastewater containing a plurality of organic pollutants |
-
2010
- 2010-01-25 CN CN 201010100756 patent/CN101732971B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105757699A (en) * | 2013-01-07 | 2016-07-13 | 宋朋泽 | Dust removal purifying system and method for flue gas |
| CN108815976A (en) * | 2018-09-05 | 2018-11-16 | 安徽磐盛新型材料科技有限公司 | A kind of kiln gas dust separation system |
| CN116510452A (en) * | 2023-05-29 | 2023-08-01 | 兰溪华能输送设备制造有限公司 | Air box type pulse bag dust collector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101732971B (en) | 2013-08-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206762557U (en) | The biomass electric power plant system for cleaning fume of dry desulfurization and low-temperature denitration | |
| CN106861350A (en) | The biomass electric power plant gas cleaning handling process and system of dry desulfurization and low-temperature denitration | |
| CN205127642U (en) | Dust removal purification system of lime production line | |
| CN204320062U (en) | A kind of high effective flue gas cleaning system | |
| CN208356505U (en) | A kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas | |
| CN105642104A (en) | Deep purification method and device of flue gas after wet-process desulfurization | |
| CN101530736A (en) | High-efficiency desulfurization and dust-removal method for glass kiln | |
| CN201320442Y (en) | Flue-gas dust removal and purification device | |
| CN101732971B (en) | Sintering smoke purifying method | |
| CN201094901Y (en) | Sintered frame head flue gas desulfurization dust removing integrated device | |
| CN203764071U (en) | Environment-friendly treatment and purification system for flue gas of cremation machines | |
| CN101474525A (en) | Bag-type dust remover with simultaneous desulphurization and denitrification functions | |
| CN202823149U (en) | Cloth bag dust-removing semi-dry process desulfurization dust removal device | |
| CN202605926U (en) | Smoke multilevel wet dust-removal decontamination device | |
| CN109966814A (en) | A kind of processing unit for fire coal boiler fume | |
| CN101301572B (en) | Dry-wet mixed type dust-removing and desulfurizing integrated device | |
| CN215085839U (en) | Dust removal system for sintering flue gas pollutants of industrial furnace | |
| CN205391987U (en) | Bag dust remover air inlet dust collector in advance that dehumidifies | |
| CN205288076U (en) | Flue gas deep purification device behind wet flue gas desulfurization | |
| CN105688527B (en) | Device and method for removing sulphur dioxide and dioxin from sintering flue gas | |
| CN201551960U (en) | Wet-type desulphurization duster | |
| CN211274048U (en) | Tail flue gas dust remover of waste incineration boiler | |
| CN210320122U (en) | Biomass boiler flue gas combined purification device | |
| CN1219583C (en) | High temperature fume dust removal, desulfurization device and its control technology | |
| CN204338010U (en) | For removing the dust pelletizing system of sulfur dioxide in sintering flue gas and dioxin |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |