CN103736381A - Dust removal device and dust removal method for sintering flue gas by shunted and graded desulfurization - Google Patents
Dust removal device and dust removal method for sintering flue gas by shunted and graded desulfurization Download PDFInfo
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Abstract
The invention relates to a dust removal device for sintering flue gas by shunted and graded desulfurization. The device comprises an air bellow set for sintering machines, a desulfurization tower and a blast furnace gas diffusion tower, wherein the air bellow set for sintering machines is connected with a flue gas inlet of the desulfurization tower, a flue gas outlet of the desulfurization tower and an inlet of the blast furnace gas diffusion tower are connected together, the top of the blast furnace gas diffusion tower is provided with an outlet, and a burner is arranged at the outlet and on the outside of the blast furnace gas diffusion tower. By using the device disclosed by the invention, a whole flue gas treatment can be performed, so that the emission of sulfur dioxide reaches the standard, and the pollution to the environment caused by dioxin in flue gas can be eliminated as far as possible; high-sulfur flue gas and low-sulfur flue gas, after being shunted, enter a same desulfurization tower to be subjected to graded desulfurization treatment, so that compared with a traditional mode of mixing high-sulfur flue gas and low-sulfur flue gas firstly and then carrying out whole flue gas treatment on the obtained mixture, the mode according to the invention has the advantages that the size of the desulfurization tower is smaller, the manufacturing cost is lower, and the investment and running costs of the desulfurization tower are reduced.
Description
Technical field
The invention belongs to Ferrous Metallurgy sintering gas purifying field, especially a kind of shunting grading desulfurization dust-removing device and dust collection method for Ferrous Metallurgy sinter fume.
Background technology
During " 12 ", China explicitly calls for, and steel industry realizes full desulfurization.Sintering flue gas desulfurization is the emphasis of steel industry environmental improvement always, China's steel industry sinter fume complicated component, and fluctuation is larger, has following characteristics: the one, exhaust gas volumn is large, and one ton of sintering deposit produces flue gas at 4000～6000m
3; The 2nd, sulfur dioxide concentration changes greatly, and scope is at 400～5000mg/Nm
3between; The 3rd, variations in temperature is large, is generally 80 ℃ to 180 ℃; The 4th, changes in flow rate is large, and amplitude of variation is up to more than 40%; The 5th, moisture is large and unstable, is generally 10～13%; The 6th, oxygen content is high, is generally 15～18%; The 7th, contain multiple pollutant component, except containing sulfur dioxide, dust, also contain heavy metal, dioxin, nitrogen oxide etc.These features have all increased the difficulty that steel sintering SO 2 from fume is administered to a certain extent.
Zhong iron and steel production sintering circuit, bioxin mainly generates by the path of " from the beginning synthetic ", and, under 250～450 degree temperature ranges and oxidizing atmosphere condition, large molecular carbon and organochlorine generate under the heavy metal ion catalytic action such as copper and iron.
Since in July, 2009 Ministry of Industry and Information's issue < < steel industry sintering flue gas desulfurization embodiment > >, the policies and regulations of iron and steel desulfurization are increasingly strict.According to the < < steel sintering, the pelletizing industrial air pollution thing discharge standard > > (GB28662-2012) that play up-to-date execution on October 1st, 2012, the SO of existing enterprise and newly-built enterprise
2emission limit is respectively 600mg/m
3and 200mg/m
3， dioxin emission limit is respectively 1.0ng-TEQ/m
3and 0.5ng-TEQ/m
3.
In steel industry sintering flue gas desulfurization technology, according to the form of desulfurization product, substantially can be divided into three classes: Wet Flue Gas Desulfurization Technique, semi-dry desulphurization technology, desulfurization by dry method at present.By technique classification, current China sintering flue gas desulfurization has more than the ten kind technology such as recirculating fluidized bed method, limestone-gypsum method, SDA rotary spraying technique, ammonia process, active carbon adsorption, magnesium oxide method, dense-phase tower method, MEROS method, has accumulated certain application experience.
At present, China scientific and technical personnel are having carried out some research aspect sintering flue gas desulfurization dedusting technology, and as the patent of invention that notification number is CN101306311A, because be full flue gas desulfurization, so cost is very high, place is arranged nervous; As the patent that notification number is CN201302374Y, although sinter fume has been carried out to selective desulfurization, greatly reduce equipment and operating cost, if can cause sulphur emissions to exceed standard when not desulfurization part raises because of the variation sulfur content in ore deposit; As the notification number patent that is CN102003886B, also the flue gas of bellows different parts has been done to differentiated treatment, except the full processing of high-sulfur flue gas, low-sulfur flue gas divides the exhaust gas volumn of leading device adjusting desulfurization processing by flue gas, further improved the reliability of total system flue gas qualified discharge, but still have the untreated and directly discharge of part low-sulfur flue gas, and low-sulfur flue gas to process proportion control difficulty larger.
According to dioxin formation mechanism and emission performance in process, mainly contain following its generation of several method control and discharge: (1) adds inhibitor to improve sinter bed condition, prevent Sheng Cheng bioxin at synthetic and other prerequisite compounds.As spray ammonia or use urea, to control the catalytic action of the metal pair bioxin such as copper in flue dust.(2) flue gas recirculation, makes the flue gas producing reenter sinter layer, reduces bioxin amount and other pollutants; (3) rapid cooling, makes flue gas by below 250～450 degree temperature section rapid cooling to 200 degree; (4) active carbon/active lignite adsorbs in conjunction with sack cleaner, and shortcoming flue dust load increases, and after absorption, active carbon is difficult to regeneration and processes; (5) catalyst reduction, Shi bioxin is oxidized at low temperatures and generates CO
2, the inorganic matter such as hydration HCl, shortcoming is that catalyst is expensive and poisoning, blockage problem easily occurs.
By retrieval, find patent publication us as relevant to patent application of the present invention in next chapter:
Sintering smoke wet method sulphur removing and dust removing technology (CN101168118), provides a kind of sintering smoke wet method sulphur removing and dust removing technology.Sinter fume first carries out cooling defluorinate after supercharging, HF in flue gas is trapped and by below cigarette temperature drop to 80 ℃ by alkali lye; Flue gas enters high-efficiency desulfurization absorption tower subsequently, by the effect of swirl-flow devices in air jet pipe in tower, flue gas high-speed rotary is poured in slurry pool, and flue gas is broken and fully mix with slurries in slurries, completes desulfurization and dedusting process; Clean flue gas after demist is discharged from chimney after heat by sintering waste heat steam again.This desulfurization dust-removing technique can be realized more than 95% desulfuration efficiency and 99% efficiency of dust collection.Cooling defluorinate device the extent of corrosion that has guaranteed the thermal safety on absorption tower and reduced tower inside is set.High-efficiency desulfurization absorption tower is without slurry circulating pump, and movement-less part in tower, and gas-liquid contact is effective.Utilize the hot mode again of sintering waste heat steam to save conventional GGH, improved the stability of system operation and reduced system cost.
By contrast, there are the different of essence from above-mentioned patent publication us in patent application of the present invention.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, provide one not only can classification process, suitably reduce investment and operating cost to full flue gas, and make sulfur dioxide (SO2) emissions up to standard, reduce sinter fume shunting grading desulfurization dust-removing device and the dust collection method of dioxin emission simultaneously, the method is simple, easy operating, with low cost, good dedusting effect.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of sinter fume shunting grading desulfurization dust-removing device, described device comprises bellows group, desulfurizing tower and the blast-furnace gas diffusing tower of sintering machine, the bellows group of described sintering machine is connected with the smoke inlet of desulfurizing tower, the exhanst gas outlet of described desulfurizing tower and the entrance of blast-furnace gas diffusing tower link together, the top of described blast-furnace gas diffusing tower arranges an outlet, at the blast-furnace gas diffusing tower in this exit, one burner is set outward;
In the bellows group of described sintering machine, set gradually bellows head end, bellows middle part and bellows end;
In the tower body of described desulfurizing tower exhanst gas outlet below, coaxial spaced is provided with liquid storage section, the first spray section, eddy flow processing section, the second spray section and demist section successively from bottom to top, at desulfurizing tower, one circulating pump is set outward, this circulation delivery side of pump links together with the first spray section and the second spray section respectively by pipeline, and the input of this circulating pump is connected and is installed together with liquid storage section;
On a side in tower body between described liquid storage section and the first spray section, be communicated with the first smoke inlet is set, on the sidewall in the tower body of the desulfurizing tower between described eddy flow processing section and the second spray section, be communicated with the second smoke inlet is set;
Described the first smoke inlet is connected together with the output of the booster fan, the first dechlorination prewashing device, the first air-introduced machine, the first sack cleaner and the first quencher that are arranged at desulfurizing tower outside successively, and the input of described the first quencher is connected with bellows middle part; Described the second smoke inlet is connected together with the output of the second dechlorination prewashing device, the second air-introduced machine, the second sack cleaner and the second quencher that are arranged at desulfurizing tower outside successively, and the input of described the second quencher links together with bellows head end and bellows end respectively.
And, between the second spray section and demist section, multiple spray section are set.
And, described eddy flow processing section comprises upper sealing panel, lower seal plate, whirl cylinder and cyclone, between described upper sealing panel and lower seal plate uniform interval seal vertically arrange several vertically, upper and lower opening, the whirl cylinder of hollow, the coaxial cyclone of installing in bottom in described whirl cylinder, described cyclone comprises swirl vane axle and swirl vane, swirl vane circularizes arrangement around swirl vane axle, and tilt to be installed on swirl vane axle, swirl vane axle and whirl cylinder are coaxially installed, the outer rim co-axial seal of described upper sealing panel and lower seal plate is installed on tower body inwall.
And described swirl vane is the blade construction that propeller type tilts, its angle of inclination with axial become 30-60 degree.
And the quantity of described swirl vane is 3～12, swirl vane is taked plane or curve form.
And the quantity of described whirl cylinder is 10～100, whirl cylinder height is 300mm～1000mm.
The dust collection method that utilizes sinter fume shunting grading desulfurization dust-removing device as above, comprises the steps:
(1) sinter fume enters in the bellows group of sintering machine, the high-sulfur flue gas at the bellows middle part of bellows group through being arranged on after the first quencher, the first sack cleaner, the first air-introduced machine, the first dechlorination prewashing device and the booster fan between bellows group and desulfurizing tower, enters in desulfurizing tower from the first smoke inlet of desulfurizing tower successively;
(2) the bellows head end of bellows group and the low-sulfur flue gas of bellows end, successively through being arranged on after the second quencher, the second sack cleaner, the second air-introduced machine and the second dechlorination prewashing device between bellows group and desulfurizing tower, enter in desulfurizing tower from the second smoke inlet of desulfurizing tower;
(3) the outer circulating pump arranging of desulfurizing tower pumps into the spray liquid having in the liquid storage section of desulfurizing tower inner bottom part setting, then spray liquid is sprayed from the first spray section and the second spray section, high-sulfur flue gas enters after desulfurizing tower through the first smoke inlet, after desulfurizing agent effect borehole cooling under the first spray section spray partial desulfurization, enter eddy flow processing section, under cyclone effect, High Rotation Speed upwards, the rotary-cut of desulfurizing agent high speed, blending with under the second spray section spray, complete main desulphurization reaction; In space between the second spray section and eddy flow processing section, low-sulfur flue gas enters after desulfurizing tower through the second smoke inlet, mix with the backward mobile high-sulfur flue gas of process eddy flow processing section, and the desulfurizing agent haptoreaction under spraying with the second spray section;
(4) the high-sulfur flue gas after purifying and the mixed flue gas of low-sulfur flue gas enter and in demister, remove the drop in flue gas, flue gas after demist from the exhanst gas outlet of desulfurizing tower in pipeline imports blast-furnace gas diffusing tower, after mixing with blast furnace gas in blast-furnace gas diffusing tower, after the burned device of blast-furnace gas diffusing tower top exit is lighted, diffuse and enter atmosphere.
And described step arranges 1 to multiple spray section in (3) on the second spray section again.
And the outlet temperature of described the first quencher and the second quencher is controlled at 150～180 ℃.
And the outlet temperature of described the first dechlorination prewashing device and the second dechlorination prewashing device is controlled at 80～90 ℃.
Advantage of the present invention and good effect are:
1, apparatus of the present invention not only can be carried out full flue gas processing, make sulfur dioxide (SO2) emissions up to standard, eliminated as far as possible the pollution of Yan gas Zhong bioxin to environment, and after high-sulfur flue gas and low-sulfur flue gas are shunted, enter same desulfurizing tower and carry out grading desulfurization processing, and first mix the traditional approach of full flue gas processing again with respect to high low-sulfur flue gas, desulfurizing tower specification is less, and cost is lower, has reduced desulfurizing tower investment and operating cost.
2, apparatus of the present invention arrange quencher, to make flue-gas temperature by below 250～450 degree rapid cooling to 200 degree, the best of missing as far as possible bioxin generates temperature, further reduced Yan gas Zhong bioxin generation probability, be conducive to bioxin simultaneously and be adsorbed on flue dust surface with solid-state form, and be mainly adsorbed on subparticle.
3, after apparatus of the present invention quencher, select with respect to wet dedusting and the higher sack cleaner of electrostatic precipitation mode efficiency of dust collection, the generation of the phenomenon in being easily adsorbed in flue gas while having avoided due to bioxin below 200 degree on fine particle, efficiency of dust collection can reach 85%～90% or higher, improve bioxin removal efficiency, also can remove and can Dui bioxin generate the heavy metals such as the copper, iron of catalytic action.
4, apparatus of the present invention arrange dechlorination prewashing device after dedusting, remove to greatest extent the chlorion in flue gas, reduce the formation condition of bioxin, also remove a large amount of other sour gas simultaneously, reduce the corrosion to follow-up equipments such as desulfurizing towers.
5, apparatus of the present invention desulfurizing tower exhanst gas outlet is connected with blast-furnace gas diffusing tower by pipeline, flue gas after desulfurization and blast furnace gas mixed combustion, can easily reach dew-point temperature discharges above, improved the diffusance of pollutant, flue gas earlier stage treatment process before desulfurizing tower has been removed the heavy metals such as chlorion and copper, iron simultaneously, avoids as far as possible the generation once again of bioxin while making to burn.
6, simple, the easy operating of dust collection method of the present invention, with low cost, good dedusting effect.
Accompanying drawing explanation
Figure l is structure connection diagram of the present invention;
Fig. 2 is the structure enlarged diagram of eddy flow processing section in Fig. 1;
Fig. 3 is the top view of Fig. 2.
The specific embodiment
As an example of accompanying drawing embodiment example, the invention will be further described below, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
A kind of sinter fume shunting grading desulfurization dust-removing device, as shown in Figure 1, described device comprises bellows group (in figure not label), desulfurizing tower 9 and the blast-furnace gas diffusing tower 11 of sintering machine; The bellows group of described sintering machine is connected with the smoke inlet of desulfurizing tower, the exhanst gas outlet 10 of described desulfurizing tower links together with the entrance of blast-furnace gas diffusing tower, the top of described blast-furnace gas diffusing tower arranges an outlet, at the blast-furnace gas diffusing tower in this exit, one burner 12 is set outward.
In the bellows group of described sintering machine, set gradually bellows head end 1, bellows middle part 2 and bellows end 3.
Top in the tower body of described desulfurizing tower arranges exhanst gas outlet, in tower body below exhanst gas outlet, coaxial spaced is provided with liquid storage section 17, the first spray section 16, eddy flow processing section 15, the second spray section 14 and demist section 13 successively from bottom to top, at desulfurizing tower, one circulating pump 18 is set outward, described circulation delivery side of pump links together with the first spray section and the second spray section respectively by pipeline, and the input of described circulating pump is connected and is installed together with liquid storage section;
In order to strengthen the desulfurization processing of low-sulfur flue gas, also high-sulfur flue gas is had to certain desulfurized effect simultaneously, can between the second spray section and demist section, multiple spray section be set.
On a side in tower body between described liquid storage section and the first spray section, be communicated with the first smoke inlet 19 is set, on the sidewall in the tower body of the desulfurizing tower between described eddy flow processing section and the second spray section, be communicated with the second smoke inlet 8 is set;
Described the first smoke inlet successively with the booster fan 20 that is arranged at desulfurizing tower outside, the first dechlorination prewashing device 21, the first air-introduced machine 22, the first sack cleaner 23 is connected together with the output of the first quencher 24, and (the first smoke inlet is connected with the output of booster fan, the input of booster fan is connected with the output of the first dechlorination prewashing device, the input of the first dechlorination prewashing device is connected with the output of the first air-introduced machine, the input of the first air-introduced machine is connected with the output of the first sack cleaner, the input of the first sack cleaner is connected with the output of the first quencher), the input of described the first quencher is connected with bellows middle part,
Described the second smoke inlet successively with the second dechlorination prewashing device 7 that is arranged at desulfurizing tower outside, the second air-introduced machine 6, the second sack cleaner 5 is connected together with the output of the second quencher 4, and (the second smoke inlet is connected with the output of the second dechlorination prewashing device, the input of the second dechlorination prewashing device is connected with the output of the second air-introduced machine, the input of the second air-introduced machine is connected with the output of the second sack cleaner, the input of the second sack cleaner is connected with the output of the second quencher), the input of described the second quencher links together with bellows head end and bellows end respectively,
As shown in Figures 2 and 3, described eddy flow processing section comprises upper sealing panel 25, lower seal plate 26, whirl cylinder 29 and cyclone, between described upper sealing panel and lower seal plate uniform interval seal vertically arrange several vertically, the whirl cylinder of upper and lower opening, hollow, the coaxial cyclone of installing in bottom in described whirl cylinder, described cyclone comprises swirl vane axle 27 and swirl vane 28, swirl vane circularizes arrangement around swirl vane axle, and tilt to be installed on swirl vane axle, swirl vane axle and whirl cylinder are coaxially installed.Swirl vane is the blade construction that propeller type tilts, its angle of inclination with axial become 30-60 degree, the quantity of this swirl vane can be determined as the case may be, is generally 3～12, and 6 swirl vanes are set in the present embodiment; Swirl vane can be taked plane or curve form, and the present embodiment is plane blade.The outer rim co-axial seal of described upper sealing panel and lower seal plate is installed on tower body inwall, and this upper sealing panel and lower seal plate can prevent flue gas short circuit, and by the enclosed cross of the desulfurizing tower tower body beyond whirl cylinder, this shrouding can be welded on whirl cylinder.The quantity of described whirl cylinder can be 10～100, and in the present embodiment, whirl cylinder, for to arrange 12 between upper sealing panel and lower seal plate, is equidistant rectangular array, and this whirl cylinder height is 300mm～1000mm.
The dust collection method that utilizes sinter fume shunting grading desulfurization dust-removing device as above, comprises the steps:
(1) sinter fume enters in the bellows group of sintering machine, the high-sulfur flue gas at the bellows middle part of bellows group through being arranged on after the first quencher, the first sack cleaner, the first air-introduced machine, the first dechlorination prewashing device and the booster fan between bellows group and desulfurizing tower, enters in desulfurizing tower from the first smoke inlet of desulfurizing tower successively;
In the first dechlorination prewashing device, adopt alkali lye to carry out prewashing to sinter fume, can substantially remove HCl and HF;
(2) the bellows head end of bellows group and the low-sulfur flue gas of bellows end, successively through being arranged on after the second quencher, the second sack cleaner, the second air-introduced machine and the second dechlorination prewashing device between bellows group and desulfurizing tower, enter in desulfurizing tower from the second smoke inlet of desulfurizing tower;
In the second dechlorination prewashing device, adopt alkali lye to carry out prewashing to sinter fume, can substantially remove HCl and HF;
(3) the outer circulating pump arranging of desulfurizing tower pumps into the spray liquid having in the liquid storage section of desulfurizing tower inner bottom part setting, then spray liquid is sprayed from the first spray section and the second spray section, high-sulfur flue gas enters after desulfurizing tower through the first smoke inlet, after desulfurizing agent effect borehole cooling under the first spray section spray partial desulfurization, enter eddy flow processing section, under cyclone effect, High Rotation Speed upwards, the rotary-cut of desulfurizing agent high speed, blending with under the second spray section spray, complete main desulphurization reaction; In space between the second spray section and eddy flow processing section, low-sulfur flue gas enters after desulfurizing tower through the second smoke inlet, mix with the backward mobile high-sulfur flue gas of process eddy flow processing section, and the desulfurizing agent haptoreaction under spraying with the second spray section;
If necessary, the 3rd spray section can be set on the second spray section again, further strengthen the desulfurization processing of low-sulfur flue gas, also high-sulfur flue gas is had to certain desulfurized effect simultaneously;
(4) the high-sulfur flue gas after purifying and the mixed flue gas of low-sulfur flue gas enter and in demister, remove the drop in mixed flue gas, flue gas after demist from the exhanst gas outlet of desulfurizing tower in pipeline imports blast-furnace gas diffusing tower, after mixing with blast furnace gas in blast-furnace gas diffusing tower, after the burned device of blast-furnace gas diffusing tower top exit is lighted, diffuse and enter atmosphere.
Dust collection method of the present invention generates for further reducing Yan gas Zhong bioxin, to make flue-gas temperature by below 250～450 ℃ of rapid coolings to 200 ℃, preferably the outlet temperature of described the first quencher and the second quencher is controlled to 150～180 ℃, the present embodiment is controlled at 170 ℃ of left and right.For the hot and humid feature of sinter fume, the outlet temperature of described the first dechlorination prewashing device and the second dechlorination prewashing device is controlled to 80～90 ℃, the present embodiment is controlled at 80 ℃, to reduce the impact of flue gas on desulfurizing tower.After flue gas after described purification mixes with blast furnace gas in blast-furnace gas diffusing tower, through burner combustion, while guaranteeing to diffuse, flue-gas temperature is greater than dew-point temperature.
In order to remove as much as possible bioxin in desulfurization, dust collection method of the present invention is before flue gas enters desulfurizing tower, taked following measure: (1) generates for further reducing Yan gas Zhong bioxin, flue-gas temperature, by below 250～450 ℃ of rapid coolings to 200 ℃, is missed to the best temperature that generates of bioxin as far as possible; (2) bioxin are below 200 ℃ time, easily be adsorbed in flue gas on fine particle, therefore select the sack cleaner that efficiency of dust collection is higher (with respect to wet dedusting and electrostatic precipitation) after quencher, efficiency of dust collection can reach 85%～90% or higher, maximum possible removal heavy metal, fine dust He bioxin; (3) for removing the chlorion that causes bioxin to generate, dechlorination prewashing device is set, can adopts alkali lye to carry out flue gas prewashing, can substantially remove HCl and HF.(4) desulfurizing tower purifying smoke after treatment enters blast-furnace gas diffusing tower and blast furnace gas mixed combustion, because of dechlorinate before desulfurizing tower link and bag-type dust link, remove the heavy metals such as copper that bioxin generates the requisite chlorion of institute and catalytic action, iron, while making to burn, avoid as far as possible the generation once again of bioxin.
The operation principle of sinter fume shunting grading desulfurization dust-removing device of the present invention is as follows:
According to the feature of sinter fume, general head end bellows flue-gas temperature is lower, the SO of generation
2seldom, middle part box temperature is higher, SO
2concentration is higher, and end bellows flue-gas temperature is high, the SO of generation
2seldom.Common big-and-middle-sized sintering unit exhausting system is by two air-introduced machine configurations, by first and end bellows flue gas Bing Cheng mono-tunnel, it is so-called low-sulfur flue gas, bellows flue gas Bing Cheng mono-tunnel, middle part, it is so-called high-sulfur flue gas, according to many sintering device flue gas measured datas, the exhaust gas volumn of high-sulfur and low-sulfur flue gas is more or less the same.The present invention has adopted two kinds of processing lines: high-sulfur treatment process line and low-sulfur treatment process line.High and low sulphur flue gas all passes through quencher, sack cleaner, air-introduced machine and dechlorination prewashing device, and low-sulfur flue gas directly enters desulfurizing tower the second smoke inlet afterwards, and high-sulfur flue gas enters desulfurizing tower the first smoke inlet after booster fan supercharging.According to two gangs of flue gas SO
2the difference of concentration, high-sulfur flue gas and low-sulfur flue gas enter different smoke inlets and carry out classification processing, and the two-layer spray of the common mistake of high-sulfur flue gas is processed and one deck eddy flow processing section intensive treatment, and low-sulfur flue gas only sprays processing by one deck.Because eddy flow processing section resistance is larger, therefore arranging a booster fan more before desulfurizing tower, high-sulfur treatment process line carries out supercharging.High-sulfur flue gas enters after desulfurizing tower through the first smoke inlet, after desulfurizing agent effect borehole cooling under the first spray section spray preliminary desulfurization, enter eddy flow processing section, under cyclone effect, formation has the swirling eddy upwards of certain speed, desulfurizing agent under the second spray section spray is held and rotary-cut repeatedly, form the gas-liquid superposed layer of dynamic stability, gas-liquid is poly-loose, blending constantly, completes main desulphurization reaction; In desulfurizing tower between the second spray section and eddy flow processing section, described low-sulfur flue gas enters after desulfurizing tower through the second smoke inlet, with through eddy flow processing section backward mobile high-sulfur flue gas, mixes, and the desulfurizing agent under spraying with the second spray section reversely contacts, reaction; Generally, low-sulfur flue gas is through one-level spray desulfurization processing, and high-sulfur flue gas has passed through two-stage spray and the processing of one-level eddy flow reinforcing desulfuration.Mixed flue gas after purification enters demister and removes the drop in flue gas, imports blast-furnace gas diffusing tower mix with blast furnace gas from exhanst gas outlet through pipeline, after the burned device of blast-furnace gas diffusing tower top exit is lighted, diffuses and enters atmosphere.The full flue gas processing mode of classification not only can guarantee that whole flue gases can meet desulfurization index request like this, and first mixes the traditional approach of full flue gas processing again with respect to high low-sulfur flue gas, and desulfurizing tower specification is less, and cost is lower.
Claims (10)
1. a sinter fume shunting grading desulfurization dust-removing device, described device comprises bellows group, desulfurizing tower and the blast-furnace gas diffusing tower of sintering machine, it is characterized in that: the bellows group of described sintering machine is connected with the smoke inlet of desulfurizing tower, the exhanst gas outlet of described desulfurizing tower and the entrance of blast-furnace gas diffusing tower link together, the top of described blast-furnace gas diffusing tower arranges an outlet, at the blast-furnace gas diffusing tower in this exit, one burner is set outward;
In the bellows group of described sintering machine, set gradually bellows head end, bellows middle part and bellows end;
In the tower body of described desulfurizing tower exhanst gas outlet below, coaxial spaced is provided with liquid storage section, the first spray section, eddy flow processing section, the second spray section and demist section successively from bottom to top, at desulfurizing tower, one circulating pump is set outward, this circulation delivery side of pump links together with the first spray section and the second spray section respectively, and the input of this circulating pump is connected and is installed together with liquid storage section;
On a side in tower body between described liquid storage section and the first spray section, be communicated with the first smoke inlet is set, on the sidewall in the tower body of the desulfurizing tower between described eddy flow processing section and the second spray section, be communicated with the second smoke inlet is set;
Described the first smoke inlet is connected together with the output of the booster fan, the first dechlorination prewashing device, the first air-introduced machine, the first sack cleaner and the first quencher that are arranged at desulfurizing tower outside successively, and the input of described the first quencher is connected with bellows middle part; Described the second smoke inlet is connected together with the output of the second dechlorination prewashing device, the second air-introduced machine, the second sack cleaner and the second quencher that are arranged at desulfurizing tower outside successively, and the input of described the second quencher links together with bellows head end and bellows end respectively.
2. sinter fume shunting grading desulfurization dust-removing device according to claim 1, is characterized in that: between the second spray section and demist section, multiple spray section are set.
3. sinter fume shunting grading desulfurization dust-removing device according to claim 1, it is characterized in that: described eddy flow processing section comprises upper sealing panel, lower seal plate, whirl cylinder and cyclone, between described upper sealing panel and lower seal plate uniform interval seal vertically arrange several vertically, upper and lower opening, the whirl cylinder of hollow, the coaxial cyclone of installing in bottom in described whirl cylinder, described cyclone comprises swirl vane axle and swirl vane, swirl vane circularizes arrangement around swirl vane axle, and tilt to be installed on swirl vane axle, swirl vane axle and whirl cylinder are coaxially installed, the outer rim co-axial seal of described upper sealing panel and lower seal plate is installed on tower body inwall.
4. sinter fume according to claim 3 shunting grading desulfurization dust-removing device, is characterized in that: described swirl vane is the blade construction that propeller type tilts, its angle of inclination with axially become 30～60 to spend.
5. according to the sinter fume shunting grading desulfurization dust-removing device described in claim 3 or 4, it is characterized in that: the quantity of described swirl vane is 3～12, and swirl vane is taked plane or curve form.
6. according to the sinter fume shunting grading desulfurization dust-removing device described in claim 3 or 4, it is characterized in that: the quantity of described whirl cylinder is 10～100, whirl cylinder height is 300mm～1000mm.
7. a dust collection method for the sinter fume shunting grading desulfurization dust-removing device of utilization as described in claim 1 to 6 any one, is characterized in that: comprise the steps:
(1) sinter fume enters in the bellows group of sintering machine, the high-sulfur flue gas at the bellows middle part of bellows group through being arranged on after the first quencher, the first sack cleaner, the first air-introduced machine, the first dechlorination prewashing device and the booster fan between bellows group and desulfurizing tower, enters in desulfurizing tower from the first smoke inlet of desulfurizing tower successively;
(2) the bellows head end of bellows group and the low-sulfur flue gas of bellows end, successively through being arranged on after the second quencher, the second sack cleaner, the second air-introduced machine and the second dechlorination prewashing device between bellows group and desulfurizing tower, enter in desulfurizing tower from the second smoke inlet of desulfurizing tower;
(3) the outer circulating pump arranging of desulfurizing tower pumps into the spray liquid having in the liquid storage section of desulfurizing tower inner bottom part setting, then spray liquid is sprayed from the first spray section and the second spray section, high-sulfur flue gas enters after desulfurizing tower through the first smoke inlet, after desulfurizing agent effect borehole cooling under the first spray section spray partial desulfurization, enter eddy flow processing section, under cyclone effect, High Rotation Speed upwards, the rotary-cut of desulfurizing agent high speed, blending with under the second spray section spray, complete desulphurization reaction; In space between the second spray section and eddy flow processing section, low-sulfur flue gas enters after desulfurizing tower through the second smoke inlet, mix with the backward mobile high-sulfur flue gas of process eddy flow processing section, and the desulfurizing agent haptoreaction under spraying with the second spray section;
(4) the high-sulfur flue gas after purifying and the mixed flue gas of low-sulfur flue gas enter and in demister, remove the drop in flue gas, flue gas after demist from the exhanst gas outlet of desulfurizing tower in pipeline imports blast-furnace gas diffusing tower, after mixing with blast furnace gas in blast-furnace gas diffusing tower, after the burned device of blast-furnace gas diffusing tower top exit is lighted, diffuse and enter atmosphere.
8. the dust collection method of described sinter fume shunting grading desulfurization dust-removing device according to claim 7, is characterized in that: described step arranges 1 to multiple spray section in (3) on the second spray section again.
9. the dust collection method of described sinter fume shunting grading desulfurization dust-removing device according to claim 7, is characterized in that: the outlet temperature of described the first quencher and the second quencher is controlled at 150～180 ℃.
10. the dust collection method of described sinter fume shunting grading desulfurization dust-removing device according to claim 7, is characterized in that: the outlet temperature of described the first dechlorination prewashing device and the second dechlorination prewashing device is controlled at 80～90 ℃.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104174284A (en) * | 2014-09-15 | 2014-12-03 | 江苏峰业科技环保集团股份有限公司 | Single-tower double-loop limestone-gypsum wet-method desulfuration device and method |
| CN105169818A (en) * | 2015-07-27 | 2015-12-23 | 航天环境工程有限公司 | Double-vane air-swirl parallel-combination demister and application thereof |
| CN105214496A (en) * | 2015-10-27 | 2016-01-06 | 展宗城 | A kind of dedusting and denitrification integrated device |
| CN107158922A (en) * | 2017-07-12 | 2017-09-15 | 江苏新春兴再生资源有限责任公司 | The desulfurizer and method of absorbing sulfur dioxide in flue are starched with lime/lime stone |
| CN107198961A (en) * | 2017-06-13 | 2017-09-26 | 武汉钢铁有限公司 | Sinter flue dust sub-prime residual heat recovery and denitration coupling process |
| CN107261808A (en) * | 2017-08-03 | 2017-10-20 | 北京威肯众合环保科技有限公司 | A kind of double ultra-clean desulfurized dust collection columns of spray of the double turbulent flows of single cycle |
| CN109157921A (en) * | 2018-08-29 | 2019-01-08 | 无锡雪浪环境科技股份有限公司 | A kind of flue gas storage device and its application method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201832542U (en) * | 2010-11-05 | 2011-05-18 | 浙江菲达脱硫工程有限公司 | Selective flue gas desulfuration and denitration apparatus for sintering machines |
| JP2013006125A (en) * | 2011-06-22 | 2013-01-10 | Babcock Hitachi Kk | Wet flue gas desulfurization apparatus, and wet flue gas desulfurization method |
| CN203235395U (en) * | 2013-04-07 | 2013-10-16 | 徐州工业职业技术学院 | Flue gas desulfurization equipment |
| CN203648373U (en) * | 2013-12-24 | 2014-06-18 | 航天环境工程有限公司 | Flow dividing and grading desulfurization and dust removing device for sintering flue gas |
-
2013
- 2013-12-24 CN CN201310740151.6A patent/CN103736381B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201832542U (en) * | 2010-11-05 | 2011-05-18 | 浙江菲达脱硫工程有限公司 | Selective flue gas desulfuration and denitration apparatus for sintering machines |
| JP2013006125A (en) * | 2011-06-22 | 2013-01-10 | Babcock Hitachi Kk | Wet flue gas desulfurization apparatus, and wet flue gas desulfurization method |
| CN203235395U (en) * | 2013-04-07 | 2013-10-16 | 徐州工业职业技术学院 | Flue gas desulfurization equipment |
| CN203648373U (en) * | 2013-12-24 | 2014-06-18 | 航天环境工程有限公司 | Flow dividing and grading desulfurization and dust removing device for sintering flue gas |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104174284A (en) * | 2014-09-15 | 2014-12-03 | 江苏峰业科技环保集团股份有限公司 | Single-tower double-loop limestone-gypsum wet-method desulfuration device and method |
| CN105169818A (en) * | 2015-07-27 | 2015-12-23 | 航天环境工程有限公司 | Double-vane air-swirl parallel-combination demister and application thereof |
| CN105169818B (en) * | 2015-07-27 | 2017-01-11 | 航天环境工程有限公司 | Double-vane air-swirl parallel-combination demister and application thereof |
| CN105214496A (en) * | 2015-10-27 | 2016-01-06 | 展宗城 | A kind of dedusting and denitrification integrated device |
| CN105214496B (en) * | 2015-10-27 | 2018-08-10 | 展宗城 | A kind of dedusting and denitrification integrated device |
| CN107198961A (en) * | 2017-06-13 | 2017-09-26 | 武汉钢铁有限公司 | Sinter flue dust sub-prime residual heat recovery and denitration coupling process |
| CN107198961B (en) * | 2017-06-13 | 2020-06-02 | 武汉钢铁有限公司 | Sintering smoke quality-based waste heat recycling and denitration coupling process |
| CN107158922A (en) * | 2017-07-12 | 2017-09-15 | 江苏新春兴再生资源有限责任公司 | The desulfurizer and method of absorbing sulfur dioxide in flue are starched with lime/lime stone |
| CN107261808A (en) * | 2017-08-03 | 2017-10-20 | 北京威肯众合环保科技有限公司 | A kind of double ultra-clean desulfurized dust collection columns of spray of the double turbulent flows of single cycle |
| CN109157921A (en) * | 2018-08-29 | 2019-01-08 | 无锡雪浪环境科技股份有限公司 | A kind of flue gas storage device and its application method |
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