CN104296532A - Automatic smoke mixing device for multiple sintering machines - Google Patents
Automatic smoke mixing device for multiple sintering machines Download PDFInfo
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- CN104296532A CN104296532A CN201410034886.1A CN201410034886A CN104296532A CN 104296532 A CN104296532 A CN 104296532A CN 201410034886 A CN201410034886 A CN 201410034886A CN 104296532 A CN104296532 A CN 104296532A
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- flue gas
- flue
- booster fan
- smoke
- sintering machine
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Abstract
The invention relates to an automatic smoke mixing device for multiple sintering machines. The automatic smoke mixing device comprises a plurality of smoke pipelines, two air inlet branch pipelines are arranged at one end of each smoke pipeline, and the other end of each smoke pipeline is connected with a smoke mixing pipeline. The two air inlet branch pipelines are each provided with an air inlet, the two air inlets are connected with two main sintering exhaust fans in a sintering machine set respectively, a booster fan is further arranged on each smoke pipeline, the booster fans are used for adjusting the pressure and the flow of smoke so that the pressure and the flow of the smoke of all the smoke pipelines are at the similar level when the smoke enters the smoke mixing pipeline. The automatic smoke mixing device can automatically mix various types of smoke.
Description
Technical field
The present invention relates to sinter fume hybrid technology field, particularly relate to a kind of flue gas automix device for multiple stage sintering machine.
Background technology
Sinter fume is at the gas containing the multiple pollutant component various powdery iron-containing raw materials, fuel and the flux that are placed on pallet igniting fusing, high temperature sintering forming process produced.The complexity that sinter fume self is intrinsic and particularity, sinter fume, compared with other dusty gas, has obvious difference: 1) exhaust gas volumn is large, change is large.Sintering process is opening completely and working under oxygen-enriched environment, due to air leak rate of air curtain high (30% ~ 50%) and solid material cycling rate high, there is quite a few air not by sinter bed, sinter fume amount is increased greatly, often produce one ton of sintering deposit and approximately produce 4000 ~ 6000m
3flue gas, amplitude of variation reaches as high as 40%.2) SO
2concentration is low, fluctuation range is large.Along with the difference of raw material sources, the change of sintering process parameter, the change in concentration scope of the sulfur dioxide that SINTERING PRODUCTION is finally produced is comparatively large, and content is approximately 400 ~ 3000mg/m
3.3) water capacity is large and unstable.In order to improve the gas permeability of sinter mixture, compound must add appropriate water before sintering and make bead, and therefore the water capacity of sinter fume is larger.4) variations in temperature is large, at 90 ~ 150 DEG C.5) to carry dust many for flue gas.Dust forms primarily of metal, metal oxide or imperfect combustion material.6) containing multiple pollutant component.Comprise the corrosive gas such as dioxin, heavy metal contaminants and hydrogen chloride, oxysulfide, nitrogen oxide, hydrogen fluoride.
The complexity intrinsic due to sinter fume self and particularity, system is wanted to consider so flue gas mixes automatically, not only to consider the characteristic of sintering production process, and to consider that the flue gas of each flue larger difference in exhaust gas volumn, temperature, pressure, particularly exhaust gas volumn fluctuate in (50%-100%) on a large scale.Also to consider that between multiple stage sintering machine, flue gas alters problem mutually simultaneously, and administer Research on Interactive Problem with later stage desulfurization or out of stock and smoke comprehensive.
Energy resource consumption is also an important problem in addition.Smelter Sinter air machine belongs to high-energy equipment; sinter fume characteristic is taken into full account during booster fan design; there is certain rich air quantity; and along with the fluctuation of production process; and when needing to adjust production output; air quantity change more greatly, needs to combine the air quantity and pressure of producing adjustment booster fan, ensures the normal mixing of flue gas.And the mode of the original adjust flux of conventional blower, pressure can not change with production load variations, but regulated by the aperture of change pipeline air door, plate washer.It is more traditional mode that the air quantity adopting air door (baffle plate) to carry out " mechanical-physical current limliting " formula regulates, it is simple that its entirety realizes structure, invest little, cost is low, but this control method is only the circulating resistance changing passage, and the power output of drive source does not change, a large amount of energy ezpenditure, among pipe network, causes station service power consumption rate to increase.Therefore the mixing of suitable frequency control way to air quantity is selected to bring positive role.
" steel and iron industry " 12 " development plan " explicitly calls for: iron ore sintering machine all installs desulfurizer additional.Existing iron ore sintering machine installs desulfurizer additional and is a sintering machine and configures a set of desulfurizer.As 430m
2sintering machine configures a set of limestone-gypsum desulphurization system, need invest nearly hundred million yuan.2 sintering machines then need the investment of nearly 200,000,000 yuan.All there is multiple stage sintering machine in Large Steel ironworks, arranges that desulfurizer investment is large and operating cost is high.The flue gas automix device of sintering system is the flue gas mixing arrangement critical system solving sintering system two or multiple stage sintering, administers carry out early-stage preparations for entering next process desulfurization or out of stock and smoke comprehensive.
Domestic at present not yet have two (or multiple stage) sintering system flue gas mixing arrangements.Other similar flue gas mixing arrangement situation is described as follows:
" flue gas mixing arrangement " (publication number CN103240014A), it is mainly used in the flue gas mixing arrangement of furnace high-temperature flue gas and roof cover normal temperature flue gas hybrid cooling in steel-smelting electric furnace production, mainly coaxial tangent line air intake mixing drum, mixing drum and the mixing inner core arranged, and the air-out position pars infrasegmentalis of mixing drum arranges ash bucket etc., it cannot adjust automatically to multiple flue gas.
Twin-stage Clothoid type SCR out of stock system ammonia flue gas mixing arrangement (application number 201110136201.0) mainly refers to that ammonia that ammonia is penetrated by playpipe is orthogonal with flue gas and converges, form strong fluidised form crushing effect, make when flue gas enters SCR reactor, flue gas and ammonia mixing reach ideal effect.It is applied to flue gas desulphurization engineering, belongs to electric power factory equipment technical field, the also adjustment that automatically mixes of not mentioned multiple flue gas.
Sintering device flue gas mixing arrangement (publication number CN202814086U), be mainly used in separate unit sintering machine, it is the mode by adding moving blade in the exhaust gases passes of sintering machine, make the gas in pipeline at rotation place formation one the mixing whirlpool of moving blade, thus the flue gas in single exhaust gases passes is fully mixed.The mixing of more than not mentioned Liang Tai and two sinter fume.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of flue gas automix device for multiple stage sintering machine, can realize the automatic mixing of multiple flue gas.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of flue gas automix device for multiple stage sintering machine, comprise many flues, one end of every bar flue is provided with two intake stack branch roads, and the other end is connected with flue gas mixing duct; Described two intake stack branch roads are equipped with an air inlet, and two air inlets are connected with two sintering main exhaust fans in sintering unit respectively; Described every bar flue is also provided with booster fan; Described booster fan is for adjusting pressure and the flow of flue gas, and the flue gas pressures during flue gas mixing duct that every bar flue is entered and flow are in close level.
Described booster fan is provided with main shaft temperature detector, vibration measuring set and stall alert device.
An electric guard board is respectively set before and after described booster fan.
Electric guard board control valve is installed in described booster fan exit.
Described booster fan adopts frequency converter to control.
Described flue near the position of air inlet, the import department of booster fan and exit be all provided with non-metal expansion joint.
Described flue and interface adopt glass flake, acidproof brick and stickers lining C276 Hastelloy to carry out anticorrosion setting.
Beneficial effect
Owing to have employed above-mentioned technical scheme, the present invention compared with prior art, there is following advantage and good effect: the present invention makes the flue gas of Multi-flue fully effectively mix by the speed governing of booster fan, and device resistance is low, save the energy consumption of flue gas mixing and reduce operating cost, thoroughly solve the difference of flue gas in exhaust gas volumn, temperature, pressure that multiple stage sintering machine enters each flue of desulfurizing tower simultaneously, pressure reduction between booster fan and main exhaust fan control, surge between booster fan and flue and between two sintering machines flue gas the mixed questions such as to alter mutually.And truly realize the stepless speed regulation of booster fan, compared with traditional booster fan Starting mode, variable frequency starting is almost negligible to the impact of electrical network.Change traditional air door and regulate air volume system, complete air quantity by controlled frequency and regulate, possess degree of regulation high, safeguard the advantages such as simple, reliable, obvious energy conservation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Embodiments of the present invention relate to a kind of flue gas automix device for multiple stage sintering machine, as shown in Figure 1, comprise two flues 1, and one end of every bar flue 1 is provided with two intake stack branch roads 2, and the other end is connected with flue gas mixing duct 3; Described two intake stack branch roads 2 are equipped with an air inlet 4, two air inlets 4 to be connected with two sintering main exhaust fans 5 in sintering unit respectively; Described every bar flue 1 is also provided with booster fan 6; Described booster fan 6 is for adjusting pressure and the flow of flue gas, and the flue gas pressures during flue gas mixing duct 3 that every bar flue 1 is entered and flow are in close level.
Wherein, described booster fan 6 is provided with main shaft temperature detector, vibration measuring set and stall alert device, and these devices above-mentioned may be used for detection control booster fan.An electric guard board 7 is respectively set before and after described booster fan 6, can prevents flue gas between two sintering machines from altering mutually by electric guard board 7, be conducive to the maintenance of separate unit sintering.Electric guard board control valve is installed in described booster fan 6 exit, can effectively be eliminated and surge phenomenon between blower fan and flue by electric guard board control valve.Described booster fan 6 adopts frequency converter 8 to control, and different flue gas pressures, flow is carried out to boosting and regulates, ensures flue gas Homogeneous phase mixing in mixing duct.Described flue 1 near the position of air inlet 4, the import department of booster fan 6 and exit be all provided with non-metal expansion joint 9, in order to reduce influencing each other between flue, equipment, and the thermal walking of reasonable distribution flue.Described flue 1 and interface adopt glass flake, acidproof brick and stickers lining C276 Hastelloy to carry out anticorrosion setting.
It is worth mentioning that, the present invention can also arrange more flue, and in actual use, flue should one_to_one corresponding with sintering unit.
During concrete use, as shown in Figure 1,2 430m
2sintering unit parallel, be arranged symmetrically with.Wherein, flue gas automix device is arranged in 1#, 2# sintering machine main exhausting unit room rear region.The entrance of flue gas automix device is 4 main exhaust fan interfaces of two sintering machines, exports as desulphurization system.
Be not difficult to find, the present invention makes the flue gas of Multi-flue fully effectively mix by the speed governing of booster fan, and device resistance is low, save the energy consumption of flue gas mixing and reduce operating cost, thoroughly solve the difference of flue gas in exhaust gas volumn, temperature, pressure that multiple stage sintering machine enters each flue of desulfurizing tower simultaneously, pressure reduction between booster fan and main exhaust fan control, surge between booster fan and flue and between two sintering machines flue gas the mixed questions such as to alter mutually.And truly realize the stepless speed regulation of booster fan, compared with traditional booster fan Starting mode, variable frequency starting is almost negligible to the impact of electrical network.Change traditional air door and regulate air volume system, complete air quantity by controlled frequency and regulate, possess degree of regulation high, safeguard the advantages such as simple, reliable, obvious energy conservation.
Claims (7)
1. for a flue gas automix device for multiple stage sintering machine, comprise many flues (1), it is characterized in that, one end of every bar flue (1) is provided with two intake stack branch roads (2), and the other end is connected with flue gas mixing duct (3); Described two intake stack branch roads (2) are equipped with an air inlet (4), and two air inlets (4) are connected with two sintering main exhaust fans (5) in sintering unit respectively; Described every bar flue (1) is also provided with booster fan (6); Described booster fan (6) is for adjusting pressure and the flow of flue gas, and flue gas pressures time flue gas mixing duct (3) that every bar flue (1) is entered and flow are in close level.
2. the flue gas automix device for multiple stage sintering machine according to claim 1, is characterized in that, described booster fan (6) is provided with main shaft temperature detector, vibration measuring set and stall alert device.
3. the flue gas automix device for multiple stage sintering machine according to claim 1, is characterized in that, respectively arranges an electric guard board (7) before and after described booster fan (6).
4. the flue gas automix device for multiple stage sintering machine according to claim 3, is characterized in that, electric guard board control valve is installed in described booster fan (6) exit.
5. the flue gas automix device for multiple stage sintering machine according to claim 1, is characterized in that, described booster fan (6) adopts frequency converter (8) to control.
6. the flue gas automix device for multiple stage sintering machine according to claim 1, it is characterized in that, the close position of air inlet (4) of described flue (1), the import department of booster fan (6) and exit are all provided with non-metal expansion joint (9).
7. the flue gas automix device for multiple stage sintering machine according to claim 1, is characterized in that, described flue (1) and interface adopt glass flake, acidproof brick and stickers lining C276 Hastelloy to carry out anticorrosion setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410034886.1A CN104296532A (en) | 2014-01-24 | 2014-01-24 | Automatic smoke mixing device for multiple sintering machines |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410034886.1A CN104296532A (en) | 2014-01-24 | 2014-01-24 | Automatic smoke mixing device for multiple sintering machines |
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| CN104296532A true CN104296532A (en) | 2015-01-21 |
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| CN201410034886.1A Pending CN104296532A (en) | 2014-01-24 | 2014-01-24 | Automatic smoke mixing device for multiple sintering machines |
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2014
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Application publication date: 20150121 |