CN103884199A - Sintering exhaust gas emission reduction treatment process and system - Google Patents
Sintering exhaust gas emission reduction treatment process and system Download PDFInfo
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- CN103884199A CN103884199A CN201410139877.9A CN201410139877A CN103884199A CN 103884199 A CN103884199 A CN 103884199A CN 201410139877 A CN201410139877 A CN 201410139877A CN 103884199 A CN103884199 A CN 103884199A
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Abstract
The invention relates to a sintering exhaust gas emission reduction treatment process. The treatment process is characterized in that hot exhaust gas produced in a production process of a sintering machine enters a sintering main dust falling tube through a sintering air bellow, the hot exhaust gas passes through a main electric dust remover for dust removal and then is exhausted through a main exhaust fan, a part of the sintering exhaust gas exhausted through the main exhaust fan enters a smoke treatment device and then is exhausted into the atmosphere through a main chimney after being treated, and the other part of the sintering exhaust gas enters a smoke circulating system, passes through a circulating pipeline through a circulating fan and is fed into a circulating smoke cover covering the upper portion of a trolley of the sintering machine to be involved in the sintering process again. On the condition that rated air volume of the main exhaust fan is not reduced, the amount of sintering exhaust gas exhausted into the atmosphere is reduced, the aim of emission reduction is achieved, and investment and operation expenses of a matched desulphurization system are reduced.
Description
Technical field
The invention belongs to the technical field of SINTERING PRODUCTION in metallurgy industry, especially a kind of sintered discharge gas reduces discharging treatment process and system.
Background technology
In sintering production process, a large amount of hot waste gas be can produce, dust, CO, CO in hot waste gas, contained
2, SO
2, heavy metal contaminants and dioxin-like chemical, it the has features such as pollutant levels are lower, smoke components relative complex, poor stability, serious environment pollution.According to national requirements for environmental protection, newly-built sintering machine system must auxiliary construction flue gas treatment facility.Environmental Protection in China requirement is at present to force desulfurization, but along with social development, other pollutant in sinter fume also will be forced to remove, the flue gas treatment facility of existing minority iron and steel enterprise configuration also simultaneously can denitration except desulfurization, de-dioxin, removing heavy-metal, deliming dirt, but the pollutant removing is more, the investment of flue gas treatment facility is larger, also exists the problem that operating cost is high, efficiency is low, byproduct is complicated and intractability is large simultaneously.The exhausted air quantity that main exhauster of sintering is discharged is determining the scale of the treating apparatus such as follow-up desulfurization, and the exhausted air quantity of processing is larger, and flue gas processing device scale is larger, and corresponding one-time investment and operating cost will be larger.If in the situation that not reducing main exhauster nominal air delivery, can reduce the processing air quantity of the flue gas processing device systems such as desulfurization, not only can reduce investment outlay and operating cost, entering airborne exhausted air quantity also can reduce, meet the reduction of discharging environmental protection policy that country advocates, this is the idealized selection of current each iron and steel enterprise.
Summary of the invention
The object of the invention is for one sintered discharge gas reduction of discharging treatment process and system is safely and effectively provided, in the situation that not reducing main exhauster nominal air delivery, reduce the sintered discharge gas amount entering in atmosphere, realize the object of " reduction of discharging ", and reduce investment and the operating cost of supporting desulphurization system.
Technical scheme of the present invention is:
A kind of sintered discharge gas reduces discharging treatment process, it is characterized in that: the hot waste gas producing in sintering machine production process enters in the main depositing dust pipe of sintering by sintering bellows, after main electric cleaner dedusting, discharged by main exhauster, the sintered discharge gas that described main exhauster is discharged, a part enters flue gas processing device, after processing, enters atmosphere by main chimney; Another part enters smoke circulating system, and that converts by circulating fan and circulating fan that wind apparatus I sends into by circulating line that sintering pallet top covers converts in the circulating flue gas cover of wind apparatus II and again participate in sintering process with circulating flue gas cover.
Above-mentioned sintered discharge gas reduces discharging treatment process, and the sintered discharge gas that described main exhauster is discharged reduces noise treatment.
To supplemental oxygen in cover, guarantee that sintering production process is unaffected so that oxygen content gas can not meet SINTERING PRODUCTION in circulating flue gas cover in the situation that.Convert converting air quantity and all can regulating of wind apparatus for two, wherein said circulating flue gas cover is converted the air quantity of converting that air quantity is greater than circulating fan and converts wind apparatus I of converting of wind apparatus II.
A kind of sintered discharge gas that is applied to above-mentioned technique reduces discharging treatment system, comprise the main depositing dust pipe of two sintering for being communicated with sintering bellows, be located at two main electric cleaners of the main depositing dust pipe of the sintering port of export, be located at two main exhausters of the main electric cleaner port of export, flue gas processing device and be located at the main chimney of the flue gas processing device port of export, it is characterized in that: described flue gas processing device arrival end is connected with the port of export of a main exhauster wherein, the port of export of another main exhauster utilizes circulating line to be communicated with the circulating flue gas cover that is covered in sintering pallet top, described circulating line is provided with circulating fan.
Above-mentioned sintered discharge gas reduces discharging treatment system, is equipped with muffler, to play respectively noise reduction function on the circulating line between the connecting pipe between described flue gas processing device and main exhauster, described circulating fan and main exhauster.
Above-mentioned sintered discharge gas reduces discharging treatment system, is provided with circulating fan and converts wind apparatus I above described circulating flue gas cover, is provided with circulating flue gas cover and converts wind apparatus II on the pipeline before described circulating fan entrance.
Above-mentioned sintered discharge gas reduces discharging treatment system, and the inlet duct sectional area of described circulating flue gas cover is greater than circulating fan outlet conduit sectional area, and circulating fan exit flow flow velocity is reduced, and guarantees that air-flow evenly enters in circulating flue gas cover.
The sintered discharge gas that another kind is applied to above-mentioned technique reduces discharging treatment system, comprise the main depositing dust pipe of sintering for being communicated with sintering bellows, be located at the main electric cleaner of the main depositing dust pipe of the sintering port of export, be located at the main exhauster of the main electric cleaner port of export, flue gas processing device and be located at the main chimney of the flue gas processing device port of export, it is characterized in that: the described main exhauster port of export is connected with distribution of air flow pipeline, described distribution of air flow pipeline has two exhanst gas outlets, and one of them exhanst gas outlet is connected with described flue gas processing device arrival end, another exhanst gas outlet is communicated with the circulating flue gas cover that is covered in sintering pallet top by circulating line, described circulating line is provided with circulating fan.
Above-mentioned sintered discharge gas reduces discharging treatment system, and the connecting pipe between described distribution of air flow pipe head and main exhauster is provided with muffler, to play noise reduction function.
Above-mentioned sintered discharge gas reduces discharging treatment system, above described circulating flue gas cover, be provided with circulating fan and convert wind apparatus I, on pipeline before described circulating fan entrance, be provided with circulating flue gas cover and convert wind apparatus II, to supplemental oxygen in cover, guarantee that sintering production process is unaffected so that oxygen content gas can not meet SINTERING PRODUCTION in circulating flue gas cover in the situation that.
Above-mentioned sintered discharge gas reduces discharging treatment system, and the inlet duct sectional area of described circulating flue gas cover is greater than circulating fan outlet conduit sectional area, and circulating fan exit flow flow velocity is reduced, and guarantees that air-flow evenly enters in circulating flue gas cover.
The invention has the beneficial effects as follows:
1, because a sintered discharge gas part enters outer row after flue gas processing device, another part enters smoke circulating system, again participates in sintering process, therefore the outer discharge capacity of sintered discharge gas has reduced 50%, emission reduction effect is obvious; Flue gas processing device (desulphurization system) is processed exhausted air quantity and is reduced 50%, has significantly reduced one-time investment and the operating cost of flue gas processing device;
2,50% sintering hot waste gas participates in sintering process again by the circulatory system, and the heat of bringing into can reduce the solid burnup of sintering process, and energy-saving effect is obvious; Meanwhile, the sulphur in waste gas is played to enrichment, be conducive to the desulfurization work of follow-up flue gas processing device.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention (corresponding embodiment 1);
Fig. 2 is the structural representation (corresponding embodiment 2) of another embodiment of the present invention.
Sequence number explanation in figure: sintering pallet 1, the main depositing dust pipe 2 of sintering, main electric cleaner 3, main exhauster 4, muffler 5, flue gas processing device 6, main chimney 7, circulating line 8, circulating fan 9, circulating flue gas cover 10, circulating fan are converted wind apparatus I 11, distribution of air flow pipeline 12, and circulating flue gas cover is converted wind apparatus II 13.
The specific embodiment
Embodiment 1
As shown in Figure 1, this sintered discharge gas reduces discharging treatment system, comprise the main depositing dust pipe 2 of two sintering for being communicated with sintering bellows, be located at main depositing dust pipe 2 ports of export of sintering two main electric cleaners 3, be located at two main exhausters 4, the flue gas processing device 6 of main electric cleaner 3 ports of export and be located at the main chimney 7 of flue gas processing device 6 ports of export.Described flue gas processing device 6 arrival ends are connected with the port of export of a main exhauster 4 wherein, and the port of export of another main exhauster 4 utilizes circulating line 8 to be communicated with the circulating flue gas cover 10 that is covered in sintering pallet 1 top.Except chassis area and the required area of maintenance chassis that sintering ignition furnace covers, all the other chassis are all under the covering of circulating flue gas cover 10.Above described circulating flue gas cover 10, be provided with circulating fan and convert wind apparatus I 11, on pipeline before described circulating fan 9 entrances, be provided with circulating flue gas cover and convert wind apparatus II 13, to supplemental oxygen in cover, guarantee that sintering production process is unaffected so that oxygen content gas can not meet SINTERING PRODUCTION in circulating flue gas cover in the situation that.
Fully mix in order to guarantee circulating flue gas and to convert general mood stream, convert converting air quantity and all can regulating of wind apparatus for two, wherein said circulating flue gas cover is converted the air quantity of converting that air quantity is greater than circulating fan and converts wind apparatus I 11 of converting of wind apparatus II 13.
Described circulating line 8 is provided with circulating fan 9, and the nominal air delivery of described circulating fan 9 equals the air quantity of a main exhauster 3, and air inlet is arranged on main exhauster 4 exits, does not need for the supporting cleaner of circulating fan 9.On circulating line 8 between connecting pipe between described flue gas processing device 6 and main exhauster 4 and described circulating fan 9 and main exhauster 4, be equipped with muffler 5.The inlet duct sectional area of circulating flue gas cover 10 is greater than circulating fan 9 outlet conduit sectional areas, circulating fan 9 exit flow flow velocitys are reduced, guarantee that air-flow evenly enters in circulating flue gas cover 10, supporting expansion joint and the valve (not shown) etc. of being provided with of described circulating line 8.
Waste gas treatment process process: the hot waste gas producing in sintering machine production process enters in two main depositing dust pipes 2 of sintering by sintering bellows, after two main electric cleaner 3 dedustings, discharged by two main exhausters 4 respectively, the sintered discharge gas that described main exhauster 4 is discharged reduces respectively after noise treatment by two mufflers 5, the sintered discharge gas that main exhauster 4 is discharged enters flue gas processing device 6, and the flue gas after processing reaches environmental protection standard and enters atmosphere by main chimney 7; The waste gas that another main exhauster 4 is discharged enters smoke circulating system, is sent in the circulating flue gas cover 10 that is covered in sintering pallet 1 top and is again participated in sintering process by circulating line 8 by circulating fan 9.
As shown in Figure 2, this sintered discharge gas reduces discharging treatment system, comprises the main depositing dust pipe 2 of a sintering for being communicated with sintering bellows, the main electric cleaner 3 of being located at main depositing dust pipe 2 ports of export of sintering, the main exhauster 4 of being located at main electric cleaner 3 ports of export, flue gas processing device 6 and is located at the main chimney 7 of flue gas processing device 6 ports of export.Described main exhauster 4 ports of export are connected with distribution of air flow pipeline 12, described distribution of air flow pipeline 12 has two exhanst gas outlets, and one of them exhanst gas outlet is connected with described flue gas processing device 6 arrival ends, another exhanst gas outlet is communicated with the circulating flue gas cover 10 that is covered in sintering pallet 1 top by circulating line 8, except chassis area and the required area of maintenance chassis that sintering ignition furnace covers, all the other chassis are all under the covering of circulating flue gas cover 10, and described circulating line 8 is provided with circulating fan 9.
Connecting pipe between described distribution of air flow pipeline 12 arrival ends and main exhauster 4 is provided with muffler 5.Described circulating flue gas cover 10 tops are provided with converts wind apparatus I 11, pipeline before the entrance of described circulating fan 9 is provided with converts wind apparatus II 13, with in the situation that the interior oxygen content gas of circulating flue gas cover 10 can not meet SINTERING PRODUCTION to cover in supplemental oxygen, guarantee that sintering production process is unaffected.
Fully mix in order to guarantee circulating flue gas and to convert general mood stream, the air quantity of converting of converting wind apparatus II 13 is greater than the air quantity of converting of converting wind apparatus I 11.
The waste gas average mark that described distribution of air flow pipeline 12 is discharged main exhauster 4 is made into two parts, introduces in two pipelines.The disposal ability of described flue gas processing device 6 is equivalent to the half of the outer waste discharge tolerance of main exhauster 4, extracts the half of the exhausted air quantity that main exhauster 4 discharges and carries out the processing such as desulfurization.
The nominal air delivery of described circulating fan 9 equals the half of the air quantity of a main exhauster 4, and air inlet is arranged on main exhauster 4 exits, does not need for the supporting cleaner of circulating fan 9.
The inlet duct sectional area of described circulating flue gas cover 10 is greater than circulating fan 9 outlet conduit sectional areas, circulating fan 9 exit flow flow velocitys are reduced, guarantee that air-flow evenly enters in circulating flue gas cover 10, supporting expansion joint and the valve (not shown) etc. of being provided with of described circulating line 8.
Waste gas treatment process process: the hot waste gas producing in sintering machine production process enters in the main depositing dust pipe 2 of sintering by sintering bellows, after main electric cleaner 3 dedustings, discharged by main exhauster 4, the sintered discharge gas that described main exhauster 4 is discharged is reduced to enter into distribution of air flow pipeline 12 after noise treatment by muffler 5, the waste gas average mark that main exhauster 4 is discharged is made into two parts, and enter different pipelines by two exhanst gas outlets, be that half waste gas enters flue gas processing device 6, the flue gas after processing reaches environmental protection standard and enters atmosphere by main chimney 7; The waste gas of half enters smoke circulating system in addition, is sent in the circulating flue gas cover 10 that is covered in sintering pallet 1 top and is again participated in sintering process by circulating line 8 by circulating fan 9.
Claims (10)
1. a sintered discharge gas reduces discharging treatment process, it is characterized in that: the hot waste gas producing in sintering machine production process enters in the main depositing dust pipe of sintering by sintering bellows, after main electric cleaner dedusting, discharged by main exhauster, the sintered discharge gas that described main exhauster is discharged, a part enters flue gas processing device, after processing, enters atmosphere by main chimney; Another part enters smoke circulating system, and that converts by circulating fan and circulating fan that wind apparatus I sends into by circulating line that sintering pallet top covers converts in the circulating flue gas cover of wind apparatus II and again participate in sintering process with circulating flue gas cover.
2. sintered discharge gas according to claim 1 reduces discharging treatment process, it is characterized in that: the sintered discharge gas that described main exhauster is discharged reduces noise treatment.
3. sintered discharge gas according to claim 1 reduces discharging treatment process, it is characterized in that: described circulating flue gas cover is converted the air quantity of converting that air quantity is greater than circulating fan and converts wind apparatus I of converting of wind apparatus II.
4. one kind is applied to the sintered discharge gas reduction of discharging treatment system of technique as claimed in claim 1, comprise the main depositing dust pipe of two sintering for being communicated with sintering bellows, be located at two main electric cleaners of the main depositing dust pipe of the sintering port of export, be located at two main exhausters of the main electric cleaner port of export, flue gas processing device and be located at the main chimney of the flue gas processing device port of export, it is characterized in that: described flue gas processing device arrival end is connected with the port of export of a main exhauster wherein, the port of export of another main exhauster utilizes circulating line to be communicated with the circulating flue gas cover that is covered in sintering pallet top, described circulating line is provided with circulating fan.
5. sintered discharge gas according to claim 3 reduces discharging treatment system, it is characterized in that: on the circulating line between the connecting pipe between described flue gas processing device and main exhauster, described circulating fan and main exhauster, be equipped with muffler.
6. sintered discharge gas according to claim 3 reduces discharging treatment system, it is characterized in that: above described circulating flue gas cover, be provided with circulating fan and convert wind apparatus I, be provided with circulating flue gas cover and convert wind apparatus II on the pipeline before described circulating fan entrance.
7. sintered discharge gas according to claim 3 reduces discharging treatment system, it is characterized in that: the inlet duct sectional area of described circulating flue gas cover is greater than circulating fan outlet conduit sectional area.
8. one kind is applied to the sintered discharge gas reduction of discharging treatment system of technique as claimed in claim 1, comprise the main depositing dust pipe of sintering for being communicated with sintering bellows, be located at the main electric cleaner of the main depositing dust pipe of the sintering port of export, be located at the main exhauster of the main electric cleaner port of export, flue gas processing device and be located at the main chimney of the flue gas processing device port of export, it is characterized in that: the described main exhauster port of export is connected with distribution of air flow pipeline, described distribution of air flow pipeline has two exhanst gas outlets, and one of them exhanst gas outlet is connected with described flue gas processing device arrival end, another exhanst gas outlet is communicated with the circulating flue gas cover that is covered in sintering pallet top by circulating line, described circulating line is provided with circulating fan.
9. the sintered discharge gas of stating according to Claim 8 reduces discharging treatment system, it is characterized in that: the connecting pipe between described distribution of air flow pipe head and main exhauster is provided with muffler.
10. the sintered discharge gas of stating according to Claim 8 reduces discharging treatment system, it is characterized in that: described circulating flue gas cover top is provided with oxygen supplementing device, and the inlet duct sectional area of described circulating flue gas cover is greater than circulating fan outlet conduit sectional area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410139877.9A CN103884199A (en) | 2014-04-09 | 2014-04-09 | Sintering exhaust gas emission reduction treatment process and system |
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| CN201410139877.9A CN103884199A (en) | 2014-04-09 | 2014-04-09 | Sintering exhaust gas emission reduction treatment process and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556108A (en) * | 2017-09-27 | 2019-04-02 | 山东省冶金设计院股份有限公司 | A kind of sintering flue gas circulatory system |
| CN110579113A (en) * | 2019-09-30 | 2019-12-17 | 马鞍山钢铁股份有限公司 | Sintering machine exhaust gas recycling system |
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| JP2001241863A (en) * | 2000-02-29 | 2001-09-07 | Kobe Steel Ltd | Exhaust gas circulating sintering operation method |
| CN101024143A (en) * | 2007-01-12 | 2007-08-29 | 中冶长天国际工程有限责任公司 | Sinter-smoke circulation collected desulfurizing method and apparatus |
| CN101539371A (en) * | 2009-04-23 | 2009-09-23 | 上海宝钢工程技术有限公司 | First flue gas dust removal and waste heat recovery system for electric stove |
| CN102003886A (en) * | 2010-11-05 | 2011-04-06 | 浙江菲达脱硫工程有限公司 | Sintering machine flue gas separation conduction type desulfurizing device and method |
| CN203396254U (en) * | 2013-06-17 | 2014-01-15 | 中冶京诚工程技术有限公司 | Device for reducing generation and emission of sintering dioxin |
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2014
- 2014-04-09 CN CN201410139877.9A patent/CN103884199A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001241863A (en) * | 2000-02-29 | 2001-09-07 | Kobe Steel Ltd | Exhaust gas circulating sintering operation method |
| CN101024143A (en) * | 2007-01-12 | 2007-08-29 | 中冶长天国际工程有限责任公司 | Sinter-smoke circulation collected desulfurizing method and apparatus |
| CN101539371A (en) * | 2009-04-23 | 2009-09-23 | 上海宝钢工程技术有限公司 | First flue gas dust removal and waste heat recovery system for electric stove |
| CN102003886A (en) * | 2010-11-05 | 2011-04-06 | 浙江菲达脱硫工程有限公司 | Sintering machine flue gas separation conduction type desulfurizing device and method |
| CN203396254U (en) * | 2013-06-17 | 2014-01-15 | 中冶京诚工程技术有限公司 | Device for reducing generation and emission of sintering dioxin |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556108A (en) * | 2017-09-27 | 2019-04-02 | 山东省冶金设计院股份有限公司 | A kind of sintering flue gas circulatory system |
| CN110579113A (en) * | 2019-09-30 | 2019-12-17 | 马鞍山钢铁股份有限公司 | Sintering machine exhaust gas recycling system |
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Application publication date: 20140625 |