CN203396254U - Device for reducing generation and emission of sintering dioxin - Google Patents
Device for reducing generation and emission of sintering dioxin Download PDFInfo
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- CN203396254U CN203396254U CN201320345606.XU CN201320345606U CN203396254U CN 203396254 U CN203396254 U CN 203396254U CN 201320345606 U CN201320345606 U CN 201320345606U CN 203396254 U CN203396254 U CN 203396254U
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Abstract
The utility model discloses a device for reducing the generation and emission of sintering dioxin. The device comprises a sintering machine, air boxes of the sintering machine and a large flue of the sintering machine, wherein the large flue of the sintering machine is divided into two independent sections, namely an emission flue and a circulation flue; the emission flue is communicated with the air boxes on the front section of the sintering machine; the circulation flue is communicated with the air boxes on the rear section of the sintering machine; an outlet of the emission flue is communicated with an emission pipeline; a sealing cover is arranged on the front section of the sintering machine; the circulation flue is connected with an inlet of a circulation fan through an exhaust circulation pipeline; an outlet of the circulation fan is communicated with the sealing cover through a gas transmission pipeline; circular cooling air circulation pipeline parallel to the exhaust circulation pipeline is communicated with the inlet of the circulation fan; an inlet of the circular cooling air circulation pipeline is communicated with a circular cooling fan cover of a circular cooler. According to the device, most of dioxin in sintering exhaust is introduced into a sintered material layer, and is decomposed in a sintering combustion zone, so that the generation and emission of the dioxin in the whole sintering process are reduced.
Description
Technical field
The utility model is about sintering process and device in a kind of field of metallurgy, relates in particular to a kind of device that reduces sintering generation of dioxin and discharge.
Background technology
Sintering circuit Shi dioxin pollutant in steel and iron industry produces more production unit.Result of study shows, sintering produces bioxin and accounts for 17.6% of total displacement, is only second to waste incineration, occupies second.For a long time, domestic steel industry does not produce enough attention for the reduction of discharging of bioxin.China as " about the Convention of Stockholm 》 signatories to a treaty of persistence organic pollutant (POPs), the obligated discharge of taking necessary means and measure to control dioxin pollutant.
Existing sintering process bioxin Prevention Technique is mainly divided into two classes, one class methods are to control according to the generation of the formation mechanism Dui dioxins materials of sintering process Zhong bioxin, these class methods are mainly to realize by materials such as the compound ,Lv source of containing benzene ring structure in minimizing raw materials for sintering and catalytic materials, but this method has certain limitation, larger to raw-material dependence, can not meet the needs that modern iron ore sintering is produced completely; And another kind of method is the reduction of discharging measure of carrying out for generating dioxins materials, mainly contain active carbon adsorption, selective catalytic reduction, desulphurization denitration method etc., these end treatment methods have played certain positive role for the reduction of discharging of sintering circuit bioxin, but they are still to exist in varying degrees up-front investment large, the problems such as operating cost is high, and technology complexity and removal efficiency are lower.
Thus, the inventor, by means of being engaged in experience and the practice of relevant industries for many years, proposes a kind of device that reduces sintering generation of dioxin and discharge, to overcome the defect of prior art.
Utility model content
The purpose of this utility model is to provide a kind of device that reduces sintering generation of dioxin and discharge, to realize the reduction of discharging of bioxin Zhong whole sintering process.
Another object of the present utility model is to provide a kind of device that reduces sintering generation of dioxin and discharge, rationally to utilize sinter fume waste heat, energy-saving and cost-reducing, reduces operating cost.
The purpose of this utility model is achieved in that a kind of device that reduces sintering generation of dioxin and discharge; The sintering machine large flue that described device includes sintering machine, sintering machine wind box and is communicated with sintering machine wind box; Described sintering machine large flue is divided into two sections of separate discharge flue and cycle flues; Described discharge flue is communicated with sintering machine leading portion bellows, and described cycle flue is communicated with sintering machine back segment bellows; The outlet of described discharge flue and discharge tube conducting; Described sintering machine leading portion is provided with seal closure; Described cycle flue is connected with a circulating fan import by a waste gas circulation pipeline, and circulating fan outlet is communicated in seal closure by a gas pipeline; Article one, the ring cold wind circulating line conducting being arranged in parallel with waste gas circulation pipeline is in circulating fan import; The import of described ring cold wind circulating line is communicated with the ring cool wind hood of central cooler.
In a better embodiment of the present utility model, the entrance point of described circulating fan is provided with an air valve; The port of export of described circulating fan is provided with a content of oxygen detecting device.
In a better embodiment of the present utility model, in described waste gas circulation pipeline and ring cold wind circulating line, be respectively equipped with a control valve.
In a better embodiment of the present utility model, in described waste gas circulation pipeline, be provided with high-temperature dust removing device.
In a better embodiment of the present utility model, described cycle flue one end is provided with converts cold blast sliding valve.
In a better embodiment of the present utility model, the import of described ring cold wind circulating line is communicated with the 3rd section of ring cool wind hood of central cooler.
In a better embodiment of the present utility model, in described discharge tube, be sequentially with main deduster, main exhauster, flue gas purifying equipment and chimney.
From the above mentioned, the utility model is the waste gas of the sintering machine back segment bellows that Shou Ji bioxin content is higher, mix and allocate into after certain quantity of fresh air with the cooling hot blast of central cooler, being back in the seal closure on sintering machine top and carrying out sintering, and waste gas in sintering machine leading portion bellows discharges.The utility model passes into sinter bed by the most bioxin in sintered discharge gas, and it is decomposed at sintering combustion band, thereby has reduced whole sintering process dioxin emission amount; Sintering discharging waste gas reduces simultaneously, can improve follow-up gas cleaning efficiency, and reduce follow-up gas cleaning cost; In addition, the sensible heat in waste gas also will be fully utilized, and finally realize the effect of energy-saving and emission-reduction.
Accompanying drawing explanation
The following drawings is only intended to the utility model to schematically illustrate and explain, does not limit scope of the present utility model.Wherein:
Fig. 1: be the apparatus structure schematic diagram of the utility model minimizing sintering generation of dioxin and discharge.
The specific embodiment
For technical characterictic of the present utility model, object and effect being had more clearly, understand, now contrast accompanying drawing the specific embodiment of the present utility model is described.
As shown in Figure 1, the utility model proposes a kind of device 100 that reduces sintering generation of dioxin and discharge; The sintering machine large flue 3 that described device 100 includes sintering machine 1, sintering machine wind box 2 and is communicated with sintering machine wind box, described sintering machine is provided with igniter 12; In the present embodiment, described sintering machine large flue 3 is divided into two sections of separate discharge flues 31 and cycle flue 32; Described discharge flue 31 is communicated with sintering machine leading portion bellows 21, and described cycle flue 32 is communicated with sintering machine back segment bellows 22; The outlet of described discharge flue 31 and discharge tube 4 conductings, waste gas sintering machine leading portion being produced by discharge tube 4 discharges, and is sequentially with main deduster 41, main exhauster 42, flue gas purifying equipment 43 and chimney 44 in described discharge tube 4; Described sintering machine 1 leading portion is provided with seal closure 11; Described cycle flue 32 is connected with circulating fan 5 imports by a waste gas circulation pipeline 321, in described waste gas circulation pipeline 321, is provided with high-temperature dust removing device 3211; Circulating fan 5 outlets are communicated in seal closure 11 by a gas pipeline 6; Article one, ring cold wind circulating line 71 conductings that are arranged in parallel with waste gas circulation pipeline 321 are in circulating fan 5 imports; The import of described ring cold wind circulating line 71 is communicated with the ring cool wind hood 72 of central cooler 7, in the present embodiment, the import of described ring cold wind circulating line 71 is (approximately 100～150 ℃ of these part wind-warm syndrome that are communicated with the 3rd section of central cooler 7 ring cool wind hood 72, and dustiness is extremely low), described ring air-cooler 7 is provided with a plurality of air blasts 73; Thus, high-temp waste gas in sintering machine back segment bellows is collected by cycle flue, after high-temperature dust removal, mixed with central cooler hot blast, the seal closure that passes into sintering machine leading portion top is interior for sintering.
The generation of sintering process Zhong bioxin is mainly by three kinds of forms, and the one, in dedusting ash, other technique returning charges, bring bioxin into and decompose completely; The 2nd, some chloride precursor compounds are by catalysis Sheng Cheng bioxin; The 3rd, the organic or inorganic chlorine in large molecular carbon and flying dust matrix generates through catalysis, and this is also the main source of sintering process Zhong bioxin.Research shows, the generation of sintering dioxins materials mainly occurs in drying and preheating band (250～450 ℃), after generation, bioxin transports downwards with air-flow, afterwards by lower floor's compound adsorption and enrichment, is finally transported to sintering machine delivery end (that is: the back segment of sintering machine).When combustion zone combustion front moves to sinter bed bottom, by bed of material enrichment bioxin, be released again.Thereby the content of ， bioxin is lower in the initial several bellows of sintering machine (the leading portion bellows of sintering machine), meanwhile, EGT is also lower, and along with the carrying out of sintering process, in sintering machine afterbody bellows, dioxins materials content is higher, and now EGT is also higher.
And the utility model is selected this part higher (that is: the back segment of sintering machine) high-temperature flue gas of bioxin content to recycle bioxin to pass through sinter bed in cyclic process, when it is during by high-temp combustion band, there is combustion decomposition, then reduce the discharge of bioxin.In addition, in cycle gas, contain a small amount of SO simultaneously
2, its generation to sintering process Zhong bioxin has larger inhibitory action, thereby further reduces the generation of bioxin.
Further, as shown in Figure 1, in the present embodiment, the entrance point of described circulating fan 5 is provided with an air valve 51; The port of export of described circulating fan 5 is provided with a content of oxygen detecting device 52; In order to coordinate the oxygen content in controlled circulation gas; The oxygen content that passes into the gas in sintering machine leading portion top seal cover 11 is detected by content of oxygen detecting device 52, according to testing result, determines whether open air valve 51, controls thus the injection rate of fresh air.
In the present embodiment, in described waste gas circulation pipeline 321 and ring cold wind circulating line 71, be respectively equipped with a control valve 8, to control air quantity.
Further, as shown in Figure 1, in the present embodiment, described cycle flue 32 is provided with converts cold blast sliding valve 322, for controlling EGT, and protection system safety.
The utility model also proposes a kind of method that device 100 that utilizes above-mentioned minimizing sintering generation of dioxin and discharge reduces discharging, the method is that sintering machine large flue is divided into two sections of separate discharge flue and cycle flues, discharge flue is communicated with sintering machine leading portion bellows, cycle flue is communicated with sintering machine back segment bellows, in sintering machine back segment bellows, high-temp waste gas is collected by cycle flue, after high-temperature dust removal, mix with central cooler hot blast, allocate into after a certain amount of fresh air, the seal closure that passes into sintering machine leading portion top is interior for sintering again; Waste gas in sintering machine leading portion bellows is collected and is discharged by discharge tube by discharging flue.
The sintered discharge gas that the method is higher by bioxin content and wind-warm syndrome is higher returns to the seal closure on sintering machine top, when realizing hot gas sintering, has reduced total emission volumn and the total exhaust gas volumn of the outer row of sintering of dioxins materials in sintering process; The method is rationally utilized sinter fume waste heat, energy-saving and cost-reducing, and the minimizing of waste gas total release will cause the treating capacity of follow-up fume purifying processes to reduce, and efficiency improves, and investment and operating cost are reduced.
In the method, the oxygen content that passes into the gas in sintering machine leading portion top seal cover is detected by content of oxygen detecting device, controls the injection rate of fresh air according to testing result.
The idiographic flow of this method is made to description below:
During SINTERING PRODUCTION, chassis is when sintering machine leading portion moves, by main exhauster 42, carry out exhausting, recyclegas in seal closure 11 participates in sintering process by sinter bed, the waste gas generating is collected to discharge flue 31 by sintering machine leading portion bellows, then pass through successively main deduster 41, main exhauster 42, flue gas purifying equipment 43, finally by chimney 44, discharged; When chassis runs to sintering machine back segment, by circulating fan 5, carry out exhausting, chassis top is without seal closure, sintering process is used air, the waste gas generating is collected to cycle flue 32 by the bellows of sintering machine back segment, after mixing with the 3rd section of cooling air of central cooler, through circulating fan 5, introduce seal closure 11, to provide sintering machine leading portion to carry out sintering process after high-temperature dust removing device 3211.On cycle flue 32, arrange and convert cold blast sliding valve 322, when EGT too high (surpassing hot precipitator working temperature) time opens, be blended into part cold wind and control EGT; On waste gas circulation pipeline 321 and ring cold wind circulating line 71, control valve 8 is set respectively, in order to regulate two parts gas flow; Circulating fan 5 front and back arrange respectively air valve 51, content of oxygen detecting device 52, by allocating amount of fresh air controlled circulation gas oxygen content into, to guarantee that sintering process normally carries out.
From the above mentioned, the method that the utility model adopts is the waste gas of the sintering machine back segment bellows that Shou Ji bioxin content is higher, mix with the cooling hot blast of central cooler and allocate into after certain quantity of fresh air, be back in the seal closure on sintering machine top and carry out sintering, and waste gas in sintering machine leading portion bellows discharges.The utility model passes into sinter bed by the most bioxin in sintered discharge gas, and it is decomposed at sintering combustion band, thereby has reduced whole sintering process dioxin emission amount; Sintering discharging waste gas reduces simultaneously, can improve follow-up gas cleaning efficiency, and reduce follow-up gas cleaning cost; In addition, the sensible heat in waste gas also will be fully utilized, and finally realize the effect of energy-saving and emission-reduction.
The foregoing is only the schematic specific embodiment of the utility model, not in order to limit scope of the present utility model.Any those skilled in the art, is not departing from equivalent variations and the modification of having done under the prerequisite of design of the present utility model and principle, all should belong to the scope of the utility model protection.
Claims (7)
1. a device that reduces sintering generation of dioxin and discharge; The sintering machine large flue that described device includes sintering machine, sintering machine wind box and is communicated with sintering machine wind box; It is characterized in that: described sintering machine large flue is divided into two sections of separate discharge flue and cycle flues; Described discharge flue is communicated with sintering machine leading portion bellows, and described cycle flue is communicated with sintering machine back segment bellows; The outlet of described discharge flue and discharge tube conducting; Described sintering machine leading portion is provided with seal closure; Described cycle flue is connected with a circulating fan import by a waste gas circulation pipeline, and circulating fan outlet is communicated in seal closure by a gas pipeline; Article one, the ring cold wind circulating line conducting being arranged in parallel with waste gas circulation pipeline is in circulating fan import; The import of described ring cold wind circulating line is communicated with the ring cool wind hood of central cooler.
2. the device of minimizing sintering generation of dioxin as claimed in claim 1 and discharge, is characterized in that: the entrance point of described circulating fan is provided with an air valve; The port of export of described circulating fan is provided with a content of oxygen detecting device.
3. the device of minimizing sintering generation of dioxin as claimed in claim 1 and discharge, is characterized in that: in described waste gas circulation pipeline and ring cold wind circulating line, be respectively equipped with a control valve.
4. the device of minimizing sintering generation of dioxin as claimed in claim 3 and discharge, is characterized in that: in described waste gas circulation pipeline, be provided with high-temperature dust removing device.
5. the device of minimizing sintering generation of dioxin as claimed in claim 4 and discharge, is characterized in that: described cycle flue one end is provided with converts cold blast sliding valve.
6. the device of minimizing sintering generation of dioxin as claimed in claim 1 and discharge, is characterized in that: the import of described ring cold wind circulating line is communicated with the 3rd section of ring cool wind hood of central cooler.
7. the device of minimizing sintering generation of dioxin as claimed in claim 1 and discharge, is characterized in that: in described discharge tube, be sequentially with main deduster, main exhauster, flue gas purifying equipment and chimney.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320345606.XU CN203396254U (en) | 2013-06-17 | 2013-06-17 | Device for reducing generation and emission of sintering dioxin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320345606.XU CN203396254U (en) | 2013-06-17 | 2013-06-17 | Device for reducing generation and emission of sintering dioxin |
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| CN203396254U true CN203396254U (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320345606.XU Expired - Lifetime CN203396254U (en) | 2013-06-17 | 2013-06-17 | Device for reducing generation and emission of sintering dioxin |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292608A (en) * | 2013-06-17 | 2013-09-11 | 中冶京诚工程技术有限公司 | Device and method for reducing generating and discharging of sintered dioxin |
| CN103884199A (en) * | 2014-04-09 | 2014-06-25 | 中冶北方（大连）工程技术有限公司 | Sintering exhaust gas emission reduction treatment process and system |
| CN103884198A (en) * | 2014-04-09 | 2014-06-25 | 中冶北方（大连）工程技术有限公司 | Device and method for dust collection and discharge of sintering flue gas |
| CN107051202A (en) * | 2017-06-13 | 2017-08-18 | 武汉钢铁有限公司 | Sinter flue gas section cyclic coupling flue dust self-catalysis denitrating system |
| CN107413193A (en) * | 2017-06-13 | 2017-12-01 | 武汉钢铁有限公司 | One kind sintering flue gas section cyclic flue dust catalytic denitration technique |
| TWI661169B (en) * | 2017-02-27 | 2019-06-01 | 日商製鐵設備技術股份有限公司 | Sintering machine |
-
2013
- 2013-06-17 CN CN201320345606.XU patent/CN203396254U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292608A (en) * | 2013-06-17 | 2013-09-11 | 中冶京诚工程技术有限公司 | Device and method for reducing generating and discharging of sintered dioxin |
| CN103884199A (en) * | 2014-04-09 | 2014-06-25 | 中冶北方（大连）工程技术有限公司 | Sintering exhaust gas emission reduction treatment process and system |
| CN103884198A (en) * | 2014-04-09 | 2014-06-25 | 中冶北方（大连）工程技术有限公司 | Device and method for dust collection and discharge of sintering flue gas |
| CN103884198B (en) * | 2014-04-09 | 2015-06-17 | 中冶北方（大连）工程技术有限公司 | Device and method for dust collection and discharge of sintering flue gas |
| TWI661169B (en) * | 2017-02-27 | 2019-06-01 | 日商製鐵設備技術股份有限公司 | Sintering machine |
| CN107051202A (en) * | 2017-06-13 | 2017-08-18 | 武汉钢铁有限公司 | Sinter flue gas section cyclic coupling flue dust self-catalysis denitrating system |
| CN107413193A (en) * | 2017-06-13 | 2017-12-01 | 武汉钢铁有限公司 | One kind sintering flue gas section cyclic flue dust catalytic denitration technique |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140115 |
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| CX01 | Expiry of patent term |