CN204401075U - A kind of sintering process SO2, dioxin works in coordination with emission-reducing system - Google Patents
A kind of sintering process SO2, dioxin works in coordination with emission-reducing system Download PDFInfo
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- CN204401075U CN204401075U CN201420634003.6U CN201420634003U CN204401075U CN 204401075 U CN204401075 U CN 204401075U CN 201420634003 U CN201420634003 U CN 201420634003U CN 204401075 U CN204401075 U CN 204401075U
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Abstract
The utility model discloses a kind of sintering process SO2, dioxin and work in coordination with emission-reducing system, belong to pollution reduction technical field in sintering process.A kind of sintering process SO of the present utility model
2, dioxin works in coordination with emission-reducing system, and its pallet top is disposed with grate-layer material distribution device, the first mixture distributor device, reduces discharging mixture distributor device, the second mixture distributor device; The bottom of described pallet is provided with bellows, wherein pallet postmedian bellows with focus on flue and be connected, the described flue that focuses on is connected with the entrance end of sack cleaner through increasing pump, the exit end of this sack cleaner is connected with flue collector, and remaining bellows of described pallet are directly connected with flue collector.The utility model, by arranging the collaborative reduction of discharging bed of material, achieves sintering process SO
2the collaborative reduction of discharging of, dioxin, significantly reduces the reduction of discharging burden of iron and steel enterprise.
Description
Technical field
The utility model relates to pollution reduction technical field in sintering process, more particularly, relates to a kind of sintering process SO2, dioxin and works in coordination with emission-reducing system.
Background technology
Sintering circuit is the important procedure that Steel Complex produce chain, along with the fast development of Iron And Steel Industry, increasing to the required amount of iron ore.But the rich ore directly entering stove ironmaking is fewer and feweri, must a large amount of exploitation and use lean ore resource.Lean ore directly enters stove smelting can make blast fumance index worsen.Therefore, lean ore obtains fine ore by ore dressing process.The fine ore that concentrate and rich ore produce in exploitation and the course of processing, could be used for blast furnace ironmaking after needing agglomeration.And the effect of sinter machine carries out agglomeration to fine ore exactly.Metallurgical performance through the mineral of sintering is greatly improved, and brings huge economic benefit to blast fumance.And sintering process is very strong to the adaptability of raw material, not only can produces agglomerate with the thicker rich ore powder of granularity and fine ore, industrial ferrous contained waste can also be processed simultaneously.
But sintering process, for while blast furnace provides and well enter stove ore deposit, also brings huge environmental pollution.Wherein, SO
2one of important pollutent in sintering process, the SO that sintering circuit is arranged outward
2account for SO in Iron and Steel Production
285% of total emission volumn.Sintering desulfuration method of the prior art, mainly to the end treatment of sinter fume, is mainly divided into dry method, semidrying and wet method, although major part can effective elimination SO
2but, its investment cost and working cost huge, easily produce secondary pollution, and be the Absorption Desulfurization method of Single Pollution thing, be difficult to the collaborative reduction of discharging realizing multiple pollutant.Therefore, existing pollution reduction method is reformed imperative.
In addition, except SO
2outside ， dioxin be another most important pollutent; Compare SO
2， dioxin to human health and physical environment harm larger, in physical environment, be difficult to degraded, can long-distance migration in the world.Dioxin is once discharge in atmosphere, is difficult to natural degradation elimination, and its toxicity is 130 times of prussiate, 900 times of arsenic, has the title of " poison in century "; It is difficult to decompose after being taken in by organism, and amplifies along food chain is concentrated, and endanger huge to human and animal, it not only has carcinogenic, teratogenesis, mutagenicity, but also has endocrine.Research shows, persistence organic pollutant can continue several generations to the impact of the mankind, forms significant threat to human survival, procreation and Sustainable development.
Sintering circuit produces the more productive unit of dioxin pollutent, and sintering produces dioxin and accounts for 17.6% of total flow rate.Sinter mixture is distributed on pallet, and along with chassis slowly movement after ignition furnace is lighted, air passes through the bed of material, and the heat energy that burning produces is by the compound sintering in zone of combustion or melting.Sintering possesses most of condition that de novo synthesis de novo reacts: (1) chlorine comes from the organochlorine composition in reclaimed dust, slag and iron ore; (2) carbon source is in carbon fiber, xylogen, coke, vinyl etc.; (3) with distortion and vacant graphite-structure, butter, copper and iron metal ion, as catalyzer; (4) oxidizing atmosphere, temperature is 250 – 450 DEG C.
In addition, produce in the process of agglomerate in iron and steel enterprise, because raw materials for sintering has recycled solid waste in enterprise (as steel-making OG mud, blast-furnace dust etc.), therefore sintering process has inevitably reclaimed part heavy metal, as heavy metal Cu, Pt, Zn, Hg etc., and these heavy metals (as Cu) exactly dioxin precursor (as polystream phenol and phenyl ether) Sheng Cheng dioxin reaction in play katalysis, facilitate the generation of dioxin.And, for reducing the low temperature reduction degradation index of agglomerate, often on finished product agglomerate, spray CaCl
2dilute solution, although reach the object improving Metallurgical Properties of Sinter, simultaneously also for the generation of sintering process Zhong dioxin provides in " chlorine source ", for its generation creates material conditions.In Europe, iron ore sintering is considered to the second largest toxic pollutants emission source being only second to city garbage incinerator.And China has issued " instruction about adding strong dioxin prevention and cure of pollution " specially on November 4th, 2010, and between " the 12 " phase, dioxin becomes priority control object.Therefore, sintering process Zhong dioxin emission-reduction technology is promoted imperative.
Through patent retrieval, some relevant technical scheme is open, as: a kind of sinter fume scrubbing CO_2 is with the device and method (CN201110173596.1) of dioxin, agglomerates of sintered pellets flue gas desulfurization and denitrification govern coordinately system and technique (CN201410072049.8), a kind of dust removal integrated equipment of sintering flue gas desulfurization Tuo dioxin (CN201310713790.3) etc. not establishing electric precipitation; Although technique scheme can realize SO
2the synchronous reduction of discharging of, dioxin, but technique scheme belongs to end treatment, it is the absorption reduction of discharging of large exhaust gas volumn, low levels, do not realize the online pollution reduction in sintering process, make the investment of pollution reduction, working cost huge, iron and steel enterprise is hung back to pollution reduction, greatly increase the reduction of discharging burden of enterprise, and reduction of discharging product very easily produces secondary pollution.
In addition, existing about SO online in sintering process
2reduce discharging relevant technical scheme open: for the on-line desulphurization method (CN99111573.2) in sintering process, based on the desulfurizing method in iron ore sintering process (CN201110022407.0) adding inhibitor, a kind of on-line desulphurization method (CN201410109130.9) etc. of sintering process; Technique scheme, by adding Ammonia material in sinter bed, achieves the on-line desulphurization in sintering process.Reduce discharging about the online dioxin of sintering process, also existing relevant technical scheme is open: the discharge-reducing method (CN201110180658.1) of iron ore sintering process dioxin, a kind of novel energy-saving emission-reducing sintering machine system and sintering method (CN201310167718.5) etc., technique scheme achieves dioxin reduction of discharging in sintering process by adding Ammonia material in sinter bed as dioxin formation inhibitor.Above-mentioned published technical scheme, what propose three kinds of Ammonia inhibitor adds scheme, (1) Ammonia inhibitor is all mixed be added in sinter bed, (2) Ammonia inhibitor is added in a certain At The Height of sinter bed, Ammonia inhibitor is sprayed on the sintered compound bed of material by (3).
But, there is following technology drawback in three kinds of technical schemes:
(1) add-on of Ammonia inhibitor is extremely micro-relative to the quality of sinter mixture, if Ammonia inhibitor mixed is joined in sinter mixture, must make there is no specific aim adding of Ammonia inhibitor, on the one hand, if the amount of the Ammonia inhibitor added is less, the emission reduction effect that then can greatly reduce, make reduction of discharging not thorough, on the other hand, if add-on is too much, not only considerably increases the consumption of urea, increase reduction of discharging cost, and easily produce secondary pollution, and the add-on of urea can have a strong impact on the quality of agglomerate;
(2) add-on of Ammonia inhibitor is extremely micro-relative to the quality of sinter mixture, if add Ammonia inhibitor to a certain At The Height, very easily fluctuation is produced due to during cloth, cause and be difficult to urea granules be joined the height of specifying, the sweetening effectiveness of urea is deteriorated, and complicated and changeable due to sintering process, the moisture of sinter mixture, fuel content, property of raw material all can produce larger impact to sintering process, thus make sintering process produce larger fluctuation, if Ammonia inhibitor to be joined the certain height place of sinter bed, emission reduction effect is easily made to produce fluctuation, in addition, because flue gas is in the process of cooling, continuous You dioxin generates, if inhibitor to be only added in a certain height of the sintered compound bed of material, when making flue gas pass through to sinter this height, flue-gas temperature is still in the temperature range of Sheng Cheng dioxin, is difficult to the reduction of discharging realizing dioxin,
(3) in sintering process, if add full compound agglomerate all technical can be caused to be deteriorated by water-soluble for urea, and decline along with the increase of urea add-on, larger to the quality influence of agglomerate, directly affects the quality into stove ore, have a strong impact on smooth operation of furnace.
Above-mentioned technical scheme, although the online reduction of discharging achieving pollutent sintering process, is all the specific reduction of discharging of Single Pollution thing, can not realizes SO
2the collaborative reduction of discharging of He dioxin; And due to SO in sintering process
2differ widely with the production mechanism of dioxin, formation zone, reduction of discharging condition, and the complicacy of sintering process in addition, each layer sintered in sintering process all constantly changes, and makes existing technical scheme be difficult to the SO realized in sintering process
2the collaborative reduction of discharging of He dioxin.If realize the SO of sintering process
2the collaborative reduction of discharging of, dioxin is not that the simple superposition of discharge-reducing method can realize SO in sintering process
2the collaborative reduction of discharging of, dioxin, just because of the difficulty of collaborative reduction of discharging, makes prior art be difficult to overcome SO online in sintering process
2, dioxin works in coordination with the technical bottleneck of reduction of discharging, and the present invention overcomes this technical bottleneck by creationary technical scheme.
In addition, existing online emission reduction schedule, only propose the discharge-reducing method of a sinter fume pollutent, but it is extremely tiny owing to reducing discharging product, if adopt fly-ash separator to carry out dedusting, will certainly cause in sintering exhausting process and produce crushing, cause air quantity in sintering process uneven, make SINTERING PRODUCTION unstable, and have a strong impact on SINTERING PRODUCTION.Existing technical scheme, the product produced after Ammonia inhibitor is combined with pollutent is difficult to be collected, the product after reduction of discharging is caused to can not get collecting, can not process the online sintered product reduced discharging, reduction of discharging is made to become " half " engineering, only alternatively be discharged in air by pollutent, the substance not realizing pollutent reduces discharging.
Utility model content
1. the utility model technical problem that will solve
The purpose of this utility model is to overcome in prior art, and sinter fume pollution reduction technology belongs to end treatment, and is difficult to realize SO in sintering process
2, dioxin works in coordination with the deficiency of reduction of discharging, provides a kind of sintering process SO2, dioxin and works in coordination with emission-reducing system, realize at the online SO of sintering process
2the collaborative reduction of discharging of, dioxin.
2. technical scheme
For achieving the above object, the technical scheme that the utility model provides is:
A kind of sintering process SO of the present utility model
2, dioxin works in coordination with emission-reducing system, and described pallet top is disposed with grate-layer material distribution device, the first mixture distributor device, reduces discharging mixture distributor device, the second mixture distributor device; Wherein: described grate-layer material distribution device is used for mating formation on pallet top the shop fixtures bed of material, the first described mixture distributor device is used for mating formation sinter mixture above the shop fixtures bed of material, and form the first mixing bed of material, described reduction of discharging mixture distributor device is used for mating formation above the first mixing bed of material being mixed with the sinter mixture of Ammonia inhibitor, and forms the collaborative reduction of discharging bed of material; The second described mixture distributor device is used for mating formation sinter mixture above the collaborative reduction of discharging bed of material, and forms the second mixing bed of material; The bottom of described pallet is provided with bellows, wherein pallet postmedian bellows with focus on flue and be connected, the described flue that focuses on is connected with the entrance end of sack cleaner through increasing pump, the exit end of this sack cleaner is connected with flue collector, and remaining bellows of described pallet are directly connected with flue collector.
Further, the filter bag specification of described sack cleaner is Φ 160 × 6000mm, and described filter bag material is the laminating filtrate of PTFE.
Further, the bellows of described postmedian are bellows corresponding below pallet length direction 1/2-3/4 position.
3. beneficial effect
The technical scheme adopting the utility model to provide, compared with existing known technology, has following unusual effect:
A kind of sintering process SO2 of the present utility model, dioxin works in coordination with emission-reducing system, the sinter mixture being mixed with Ammonia inhibitor is mated formation to be formed above the first mixing bed of material and collaborative is reduced discharging the bed of material by creationary proposition, and creationaryly have adjusted the collaborative content reducing discharging carbonaceous fuel in the bed of material and CaO, the collaborative reduction of discharging band that in sinter bed, formation one is wider, make sinter fume in the process of cooling, suppress the generation of dioxin, until sinter fume temperature is reduced to below dioxin synthesis temperature, and while suppression dioxin generates, be gathered in the SO of excessive moistening layer
2react with urea, make the collaborative band that reduces discharging cover the generating layer of dioxin and the active position of desulfurization, thus breakthrough achieve SO online in sintering process
2the collaborative reduction of discharging of, dioxin, and the normal production that ensure that sintering work, overcome the technology drawback of Single Pollution thing end-o f-pipe-control of the prior art, greatly reduce the cost of sintering process pollution reduction, alleviates the reduction of discharging burden of iron and steel enterprise,
In addition, flue gas in the bellows of pallet postmedian focuses on by the creationary proposition of the utility model, and the flue gas after bag-type dust is imported flue collector through topping-up pump, ensure that the balance of air quantity in sintering process, thus ensure that the steady production of sintering process.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of collaborative emission-reducing system of the present utility model;
Fig. 2 is the cloth schematic diagram of collaborative discharge-reducing method;
Fig. 3 is that the collaborative asynchronous desulfurization degree of bed thickness that reduces discharging of the utility model is with dioxin emission reduction efficiency trend map.
Label declaration in schematic diagram:
1, the shop fixtures bed of material; 2, the first mixing bed of material; 3, the collaborative reduction of discharging bed of material; 4, the second mixing bed of material; 5, pallet; 61, grate-layer material distribution device; 62, the first mixture distributor device; 63, mixture distributor device is reduced discharging; 64, the second mixture distributor device; 7, flue is focused on; 8, flue collector; 9, sack cleaner.
Embodiment
For understanding content of the present utility model further, below in conjunction with embodiment, the utility model will be further described.
Embodiment 1
Composition graphs 1, Fig. 2 and Fig. 3, a kind of sintering process SO of the present embodiment
2, dioxin works in coordination with emission-reducing system, described pallet 5 top is disposed with grate-layer material distribution device 61, first mixture distributor device 62, reduces discharging mixture distributor device 63, second mixture distributor device 64 (as shown in Figure 1), wherein: described grate-layer material distribution device 61 is for the shop fixtures bed of material 1 of mating formation on pallet 5 top, the first described mixture distributor device 62 is for sinter mixture of mating formation above the shop fixtures bed of material 1, and forming the first mixing bed of material 2, the described shop fixtures bed of material 1 and the total thickness of the first mixing bed of material 2 are 90mm; Described reduction of discharging mixture distributor device 63 is mixed with the sinter mixture of Ammonia inhibitor for mating formation above the first mixing bed of material 2, and form the collaborative reduction of discharging bed of material 3, this collaborative height reducing discharging the bed of material 3 distance from bottom pallet 5 is 90mm, and the collaborative thickness reducing discharging the bed of material 3 is 100mm; The second described mixture distributor device 64 is for sinter mixture of mating formation above the collaborative reduction of discharging bed of material 3, and forming the second mixing bed of material 4, the described shop fixtures bed of material 1, first mixes the bed of material 2, the collaborative bed of material total height (bed of material total thickness) reducing discharging the bed of material 3 and the second mixing bed of material 4 is 800mm.The area of the pallet 5 of the present embodiment is 180m
2, have 14 bellows below pallet 5, and from sintering device handpiece open numbering, be numbered 1
#to 14
#.
The bottom of the pallet 5 of the present embodiment is provided with bellows, wherein pallet 5 postmedian bellows with focus on flue 7 and be connected, the bellows of this postmedian are bellows corresponding below pallet 5 length direction 1/2-3/4 position, below the pallet 5 being the present embodiment 7
#to 11
#bellows.
The flue 7 that focuses on of the present embodiment is connected with the entrance end of sack cleaner 9 through increasing pump, and the filter bag specification of this sack cleaner 9 is Φ 160 × 6000mm, and sack cleaner 9 is provided with 800 filter bags, total filtration area 2413m of this sack cleaner 9
2, filter bag material is the laminating filtrate of PTFE, can realize carrying out supplementary set by reducing discharging the ammonium sulfate generated in the process using bag-type dust, and reduction of discharging product is carried out resource utilization application, meets the theory turned waste into wealth.The exit end of described sack cleaner 9 is connected with flue collector 8, and the flue gas after bag-type dust is imported flue collector 8 through topping-up pump, ensure that the balance of air quantity in sintering process, thus ensure that the steady production of sintering process; Described remaining bellows of pallet 5 are directly connected with flue collector 8, are 1 of the present embodiment
#to 6
#bellows and 12
#to 14
#bellows are directly connected with flue collector 8.
Applicant of the present utility model is in order to realize the SO in sintering process
2the collaborative reduction of discharging of He dioxin, have passed long a series of exploration; But, due to SO in sintering process
2differ widely with the production mechanism of dioxin, formation zone, reduction of discharging condition, make existing technical scheme be difficult to the SO realized in sintering process
2the collaborative reduction of discharging of He dioxin; Wherein limit SO in sintering process
2the principal element that He dioxin works in coordination with reduction of discharging have following some:
(1) formation zone is different: SO in sintering process
2concentrated discharge region at zone of combustion and drying layer, and SO
2concentrated attached collection at excessive moistening layer; But dioxin mainly contains two formation zone in sintering process, the cooling zone of first sintering ore bed, it two is drying and preheating layers of sinter bed, and the dioxin that particularly drying and preheating layer generates can not be degraded;
(2) temperature condition reduced discharging is different: adopt urea to SO
2during reduction of discharging, urea and SO
2temperature of reaction need lower than 100 DEG C; But the temperature range suppressing dioxin to generate is 200-800 DEG C;
(3) difference of mechanism is reduced discharging: at employing urea to SO
2during reduction of discharging, due to SO
2concentrate and be gathered in the comparatively narrow and small one deck of sinter bed, only need that urea is added targetedly to this narrow and small one deck and can realize reducing discharging; But, when suppressing dioxin to generate, need the generation of the suppression dioxin continued through the temperature range of 200-800 DEG C in flue-gas temperature.
Seriously hinder in sintering process just because of above factor and limit SO
2he dioxin is collaborative to be reduced discharging, and complicacy, the fluctuation of sintering process in addition, each layer sintered in sintering process all constantly changes, and makes SO online in sintering process
2the reduction of discharging of He dioxin becomes a great technical bottleneck.
Through exploration unremitting for a long time, the sinter mixture being mixed with Ammonia inhibitor is mated formation to be formed above the first mixing bed of material 2 and collaborative is reduced discharging the bed of material 3 by the creationary proposition of final applicant of the present utility model, thus the collaborative reduction of discharging band that formation one is wider in sinter bed, make sinter fume in the process of cooling, suppress the generation of dioxin, until sinter fume temperature is reduced to below dioxin synthesis temperature, and while suppression dioxin generates, be gathered in the SO of excessive moistening layer
2react with urea, make the collaborative band that reduces discharging cover the generating layer of dioxin and the active position of desulfurization; And the utility model improves the collaborative content reducing discharging CaO in the bed of material 3, provide a weakly alkaline environment for urea realizes dioxin reduction of discharging, the discovery emission reduction effect that applicant is surprised improves greatly; In addition, the utility model improves the collaborative content reducing discharging carbonaceous fuel in the bed of material 3, thus ensure all technical of sintering, for SINTERING PRODUCTION normally provides safeguard, under the prerequisite ensureing sintering quality, suppress the generation of sintering process dioxin, the dioxin achieving sintering process reduces discharging; And be gathered in the SO of excessive moistening layer
2react with urea, thus breakthrough achieve SO online in sintering process
2the collaborative reduction of discharging of, dioxin, overcomes this important technical bottleneck.
A kind of sintering process SO of the present utility model
2, dioxin works in coordination with discharge-reducing method, and its concrete implementation step is:
Step one: sintering feed
(A) utilize grate-layer material distribution device 61 to mat formation on the top of pallet 5 grate-layer material, form the shop fixtures bed of material 1;
(B) utilize the first mixture distributor device 62 above the shop fixtures bed of material 1, fill paving sinter mixture, form the first mixing bed of material 2, the total thickness of this shop fixtures bed of material 1 and the first mixing bed of material 2 is 90mm;
(C) mix with sinter mixture after water-soluble for Ammonia inhibitor, utilize and reduce discharging mixture distributor device 63 and the sinter mixture being mixed with Ammonia inhibitor is mated formation to be formed above the first mixing bed of material 2 and collaboratively reduce discharging the bed of material 3, this collaborative height reducing discharging the bed of material 3 distance from bottom pallet 5 is 90mm, and the collaborative thickness reducing discharging the bed of material 3 is 100mm;
(D) utilize the second mixture distributor device 64 to be mated formation by sinter mixture above the collaborative reduction of discharging bed of material 3, form the second mixing bed of material 4;
Step 2: fume centralized collection and treatment
Down draft sintering is carried out after igniting, in the process of sinter machine down draft sintering, flue gas in the bellows of pallet 5 postmedian is imported and focuses on flue 7, the flue gas focused in flue 7 imports sack cleaner 9 through topping-up pump, the supercharging pressure of described topping-up pump is 0.9KPa, the wind speed controlled in sack cleaner 9 is 0.80m/mim, and the sinter fume after sack cleaner 9 dedusting introduces Main Gas Flue of Sintering Machine 8 by pipeline.
Ammonia inhibitor solution in the collaborative reduction of discharging bed of material 3 of the present embodiment is urea soln, and wherein the add-on of urea is 0.09% of sinter bed total mass.The first mixing bed of material 2 of the present embodiment and the mass percentage of the second carbonaceous fuel mixed in the sinter mixture of the bed of material 4 are 3.2%, this carbonaceous fuel is coke powder, and the mass percentage of the first mixing bed of material 2 and the second CaO mixed in the sinter mixture of the bed of material 4 is 4.2%; The mass percentage of the carbonaceous fuel in the described collaborative reduction of discharging bed of material 3 is 4.0%, and this carbonaceous fuel is coke powder, and the mass percentage of this collaborative CaO reduced discharging in the bed of material 3 is 5.0%.
In the process of sintering, measure the SO of flue gas in sintering process at flue collector 8
2concentration with the concentration of dioxin, and calculates desulfurization degree with the emission reduction efficiency of dioxin.
Desulfurization degree=(SO in benchmarks flue gas
2sO after concentration-reduction of discharging in flue gas
2concentration) SO in/benchmarks flue gas
2concentration × 100%.
Dioxin concentration × 100% in dioxin emission reduction efficiency=(in benchmarks flue gas after the concentration-reduction of discharging of dioxin in flue gas dioxin concentration)/benchmarks flue gas.
Comparative example 1
This comparative example is as benchmarks, the sintering process of this comparative example is with embodiment 1, difference is: the collaborative thickness reducing discharging the bed of material 3 is zero, namely the collaborative reduction of discharging bed of material 3 is not set, only have the shop fixtures bed of material 1, first to mix the bed of material 2 and the second mixing bed of material 4, and the bed of material total height (bed of material total thickness) that the shop fixtures bed of material 1, first mixes the bed of material 2 and the second mixing bed of material 4 is 800mm.After sintering starts, measure the SO of flue gas in sintering process
2the concentration of, dioxin, and record is as table 1, as the benchmark of later experiments.
SO in the flue gas of table 1 sintering experiment
2, dioxin concentration and emission reduction efficiency
Can be found by the experiment of comparative example 1 and embodiment 1, be provided with the collaborative reduction of discharging bed of material 3 between the first mixing bed of material 2 and the second mixing bed of material 4 after, compare the benchmarks in ratio 1, SO in flue gas in embodiment 1
2concentration (mg/Nm
3) by 694.2mg/Nm
3be reduced to 108.0mg/Nm
3, emission reduction efficiency reaches 84.44%, dioxin concentration (pg-TEQ/Nm in flue gas
3) by 763pg-TEQ/Nm
3be reduced to 287pg-TEQ/Nm
3, emission reduction efficiency reaches 62.39%, reaches the standard that National Pollutant reduces discharging, thus breakthrough achieves SO online in sintering process
2the collaborative reduction of discharging of, dioxin, overcomes this important technical bottleneck.Desulfurization degree in embodiment 1-7 He dioxin emission reduction efficiency as shown in Figure 3.
The utility model arranges a wider collaborative reduction of discharging bed of material 3 by creationary proposition in the sintered compound bed of material, the collaborative bed of material 3 that reduces discharging is added with urea as dioxin formation inhibitor, and have adjusted the collaborative composition proportion reduced discharging in the bed of material 3, make sinter fume in the process of cooling, suppress the generation of dioxin, until sinter fume temperature is reduced to below dioxin synthesis temperature, and while suppression dioxin generates, be gathered in the SO of excessive moistening layer
2react with urea, make the collaborative band that reduces discharging cover the generating layer of dioxin and the active position of desulfurization; And, the utility model is creationary improves the collaborative content reducing discharging CaO in the bed of material 3, a weakly alkaline environment is provided for urea realizes dioxin reduction of discharging, substantially increase emission reduction effect, in addition, suitable improves the collaborative content reducing discharging carbonaceous fuel in the bed of material 3, thus ensure all technical of sintering, for SINTERING PRODUCTION normally provides safeguard, thus under the prerequisite ensureing sintering quality, inhibit the generation of sintering process dioxin; And while achieving the reduction of discharging of sintering process dioxin, be gathered in the SO of excessive moistening layer
2react with urea, make the SO in sinter fume
2reduced discharging, thus achieved sintering process SO
2the collaborative reduction of discharging of, dioxin, is significant to the cleaner production of Iron And Steel Industry and Sustainable development.
Embodiment 2
SO in the sintering process of the present embodiment
2, dioxin works in coordination with the primary process of discharge-reducing method with embodiment 1, difference is: the shop fixtures bed of material 1, first of the present embodiment mixes the bed of material 2, the collaborative bed of material total height (bed of material total thickness) reducing discharging the bed of material 3 and the second mixing bed of material 4 is 800mm, wherein the collaborative thickness reducing discharging the bed of material 3 is 110mm, and detects SO
2the generation concentration of, dioxin, and calculate the emission reduction efficiency of desulfurization degree, dioxin, the desulfurization degree of the present embodiment is the emission reduction efficiency of 85.14% ， dioxin is 63.83%.
Embodiment 3
SO in the sintering process of the present embodiment
2, dioxin works in coordination with the primary process of discharge-reducing method with embodiment 1, difference is: the shop fixtures bed of material 1, first of the present embodiment mixes the bed of material 2, the collaborative bed of material total height (bed of material total thickness) reducing discharging the bed of material 3 and the second mixing bed of material 4 is 800mm, wherein the collaborative thickness reducing discharging the bed of material 3 is 120mm, and detects SO
2the generation concentration of, dioxin, and calculate the emission reduction efficiency of desulfurization degree, dioxin, the desulfurization degree of the present embodiment is the emission reduction efficiency of 85.78% ， dioxin is 65.95%.
Embodiment 4
SO in the sintering process of the present embodiment
2, dioxin works in coordination with the primary process of discharge-reducing method with embodiment 1, difference is: the shop fixtures bed of material 1, first of the present embodiment mixes the bed of material 2, the collaborative bed of material total height (bed of material total thickness) reducing discharging the bed of material 3 and the second mixing bed of material 4 is 800mm, wherein the collaborative thickness reducing discharging the bed of material 3 is 130mm, and detects SO
2the generation concentration of, dioxin, and calculate the emission reduction efficiency of desulfurization degree, dioxin, the desulfurization degree of the present embodiment is the emission reduction efficiency of 86.13% ， dioxin is 67.21%.
Embodiment 5
SO in the sintering process of the present embodiment
2, dioxin works in coordination with the primary process of discharge-reducing method with embodiment 1, difference is: the shop fixtures bed of material 1, first of the present embodiment mixes the bed of material 2, the collaborative bed of material total height (bed of material total thickness) reducing discharging the bed of material 3 and the second mixing bed of material 4 is 800mm, wherein the collaborative thickness reducing discharging the bed of material 3 is 140mm, and detects SO
2the generation concentration of, dioxin, and calculate the emission reduction efficiency of desulfurization degree, dioxin, the desulfurization degree of the present embodiment is the emission reduction efficiency of 86.56% ， dioxin is 68.13%.
Embodiment 6
SO in the sintering process of the present embodiment
2, dioxin works in coordination with the primary process of discharge-reducing method with embodiment 1, difference is: the shop fixtures bed of material 1, first of the present embodiment mixes the bed of material 2, the collaborative bed of material total height (bed of material total thickness) reducing discharging the bed of material 3 and the second mixing bed of material 4 is 800mm, wherein the collaborative thickness reducing discharging the bed of material 3 is 150mm, and detects SO
2the generation concentration of, dioxin, and calculate the emission reduction efficiency of desulfurization degree, dioxin, the desulfurization degree of the present embodiment is the emission reduction efficiency of 85.29% ， dioxin is 69.08%.
Embodiment 7
SO in the sintering process of the present embodiment
2, dioxin works in coordination with the primary process of discharge-reducing method with embodiment 1, difference is: the shop fixtures bed of material 1, first of the present embodiment mixes the bed of material 2, the collaborative bed of material total height (bed of material total thickness) reducing discharging the bed of material 3 and the second mixing bed of material 4 is 800mm, wherein the collaborative thickness reducing discharging the bed of material 3 is 160mm, and detects SO
2the generation concentration of, dioxin, and calculate the emission reduction efficiency of desulfurization degree, dioxin, the desulfurization degree of the present embodiment is the emission reduction efficiency of 83.86% ， dioxin is 69.34%.
Embodiment 8
SO in the sintering process of the present embodiment
2, dioxin works in coordination with the primary process of discharge-reducing method with embodiment 1, difference is: the shop fixtures bed of material 1, first of the present embodiment mixes the bed of material 2, the collaborative bed of material total height (bed of material total thickness) reducing discharging the bed of material 3 and the second mixing bed of material 4 is 800mm, wherein collaborative reduction of discharging in the bed of material 3 reduces discharging inhibitor except adding urea as dioxin, and applicant has been mixed into kaolin at the collaborative reduction of discharging bed of material 3, wherein kaolinic add-on is 0.01% of sinter bed total mass, the percent of pass that this kaolin joins 200 mesh sieves is 75%, and detects SO
2the generation concentration of, dioxin, and calculate the emission reduction efficiency of desulfurization degree, dioxin.Then, the discovery that applicant is surprised, be improved in the emission reduction efficiency of the identical Shi dioxin of condition such as the collaborative reduction of discharging bed of material 3 thickness, urea proportioning, the present embodiment desulfurization degree is the emission reduction efficiency of 84.86% ， dioxin is 65.57%.
Embodiment 9
SO in the sintering process of the present embodiment
2, dioxin works in coordination with the primary process of discharge-reducing method with embodiment 1, difference is: the shop fixtures bed of material 1 of the present embodiment, the first mixing bed of material 2, the collaborative bed of material total height (bed of material total thickness) reducing discharging the bed of material 3 and the second mixing bed of material 4 is 800mm, wherein the collaborative height reducing discharging the bed of material 3 distance from bottom pallet 5 is 80mm, wherein the add-on of urea is 0.03% of sinter bed total mass, the mass percentage that described association works in coordination with the carbonaceous fuel reduced discharging in the bed of material 3 is 3.5%, wherein carbonaceous fuel is coal dust, the mass percentage of this collaborative CaO reduced discharging in the bed of material 3 is 4.5%, in addition, the supercharging pressure of described topping-up pump is 0.8KPa, and the wind speed controlled in sack cleaner 9 is 0.75m/mim.And detect SO
2the generation concentration of, dioxin, and calculate the emission reduction efficiency of desulfurization degree, dioxin, the desulfurization degree of the present embodiment is the emission reduction efficiency of 75.19% ， dioxin is 55.08%.
Embodiment 10
SO in the sintering process of the present embodiment
2, dioxin works in coordination with the primary process of discharge-reducing method with embodiment 1, difference is: the shop fixtures bed of material 1 of the present embodiment, the first mixing bed of material 2, the collaborative bed of material total height (bed of material total thickness) reducing discharging the bed of material 3 and the second mixing bed of material 4 is 800mm, height wherein with the reduction of discharging bed of material 3 distance from bottom pallet 5 is 100mm, wherein the add-on of urea is 0.12% of sinter bed total mass, the mass percentage of the carbonaceous fuel in the described collaborative reduction of discharging bed of material 3 is 5.0%, wherein carbonaceous fuel is made up of by the mass ratio of 1:1 coke powder and coal dust, the mass percentage of this collaborative CaO reduced discharging in the bed of material 3 is 6.0%, in addition, the supercharging pressure of described topping-up pump is 1.0KPa, and the wind speed controlled in sack cleaner 9 is 0.85m/mim.And detect SO
2the generation concentration of, dioxin, and calculate the emission reduction efficiency of desulfurization degree, dioxin, the desulfurization degree of the present embodiment is the emission reduction efficiency of 85.38% ， dioxin is 66.58%.
Schematically above be described the utility model and embodiment thereof, this description does not have restricted, and also just one of the embodiment of the present utility model shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the utility model and creating aim, design the frame mode similar to this technical scheme and embodiment without creationary, protection domain of the present utility model all should be belonged to.
Claims (3)
1. a sintering process SO
2, dioxin works in coordination with emission-reducing system, it is characterized in that: pallet (5) top is disposed with grate-layer material distribution device (61), the first mixture distributor device (62), reduces discharging mixture distributor device (63), the second mixture distributor device (64);
Wherein: described grate-layer material distribution device (61) is for the shop fixtures bed of material (1) of mating formation on pallet (5) top, the first described mixture distributor device (62) is for sinter mixture of mating formation in the shop fixtures bed of material (1) top, and form the first mixing bed of material (2), described reduction of discharging mixture distributor device (63) is mixed with the sinter mixture of Ammonia inhibitor for mating formation in the first mixing bed of material (2) top, and forms the collaborative reduction of discharging bed of material (3); The second described mixture distributor device (64) for sinter mixture of mating formation in the collaborative reduction of discharging bed of material (3) top, and forms the second mixing bed of material (4);
The bottom of described pallet (5) is provided with bellows, wherein pallet (5) postmedian bellows with focus on flue (7) and be connected, the described flue (7) that focuses on is connected with the entrance end of sack cleaner (9) through increasing pump, the exit end of this sack cleaner (9) is connected with flue collector (8), and described pallet (5) remaining bellows are directly connected with flue collector (8).
2. a kind of sintering process SO according to claim 1
2, dioxin works in coordination with emission-reducing system, it is characterized in that: the filter bag specification of described sack cleaner (9) is Φ 160 × 6000mm, and described filter bag material is the laminating filtrate of PTFE.
3. a kind of sintering process SO according to claim 1
2, dioxin works in coordination with emission-reducing system, it is characterized in that: the bellows of described postmedian are bellows corresponding below pallet (5) length direction 1/2-3/4 position.
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| CN201420634003.6U CN204401075U (en) | 2014-10-29 | 2014-10-29 | A kind of sintering process SO2, dioxin works in coordination with emission-reducing system |
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| CN201420634003.6U CN204401075U (en) | 2014-10-29 | 2014-10-29 | A kind of sintering process SO2, dioxin works in coordination with emission-reducing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104962732A (en) * | 2014-10-29 | 2015-10-07 | 安徽工业大学 | Cooperative emission reduction method and system for SO2 and dioxin produced in sintering |
| CN112569757A (en) * | 2019-09-27 | 2021-03-30 | 江苏集萃冶金技术研究院有限公司 | Sintering flue gas online desulfurization process |
-
2014
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104962732A (en) * | 2014-10-29 | 2015-10-07 | 安徽工业大学 | Cooperative emission reduction method and system for SO2 and dioxin produced in sintering |
| CN104962732B (en) * | 2014-10-29 | 2017-06-16 | 安徽工业大学 | A kind of sintering process SO2, bioxin cooperates with discharge-reducing method and system |
| CN112569757A (en) * | 2019-09-27 | 2021-03-30 | 江苏集萃冶金技术研究院有限公司 | Sintering flue gas online desulfurization process |
| CN112569757B (en) * | 2019-09-27 | 2022-08-23 | 江苏集萃冶金技术研究院有限公司 | Sintering flue gas online desulfurization process |
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