CN205007783U - A clean system for sintering machine aircraft nose flue gas terminal handling - Google Patents

A clean system for sintering machine aircraft nose flue gas terminal handling Download PDF

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Publication number
CN205007783U
CN205007783U CN201520444831.8U CN201520444831U CN205007783U CN 205007783 U CN205007783 U CN 205007783U CN 201520444831 U CN201520444831 U CN 201520444831U CN 205007783 U CN205007783 U CN 205007783U
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China
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flue gas
dust collector
discharge
collector pole
discharge electrode
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CN201520444831.8U
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陈勇
陈玉伟
程晓辉
刘训稳
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Nanjing Zhongdian Environmental Protection Technology Co Ltd
Nanjing Cec Environmental Protection Co Ltd
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Nanjing Zhongdian Environmental Protection Technology Co Ltd
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Abstract

The utility model provides a clean system for sintering machine aircraft nose flue gas terminal handling, includes wet -type electrostatic precipitator and supporting alkali lye preparation facilities and water collection, circulation and processing apparatus, wet -type electrostatic precipitator contains the arrangement and washes layer (4), sprays in flue gas equipartition device, the spraying of flue gas inlet department and wash layer (5) and include discharge electrode (6), the electrostatic precipitator who gathers dust the utmost point (7) who arranges at flue gas area equipartition, the discharge electrode is hollow nearly circular metal discharge lever, and the discharge electrode is the 5-35mm of diameter of metal discharge lever, and the discharge lever both sides respectively have one M type to consolidate the groove, and the pointed end of discharging of discharge electrode is triangle -shaped, and the pointed end of discharging is located the reinforcement inslot, contain in the flue gas under high metal dust, ash content and the corrosivity member condition, high -efficient, low material consumption, detach the produced multiple pollutants such as SO3 acid mist of fine particle thing, heavy metal, aerosol and wet flue gas desulfurization such as SO2 in the flue gas, PM2.5 in coordination.

Description

A kind of cleaning system for sintering device handpiece flue gas terminal processes
Technical field
The utility model belongs to technical field of air pollution control, particularly a kind of cleaning system for sintering device handpiece flue gas terminal processes.
Background technology
Along with Environmental protection is more and more paid attention to, fine flue dust, SO 3agenda that the reduction of discharging of the pollutant that acid mist, mercury etc. exist with aerosol form is referred.Traditional dry electric precipitation device is for fine flue dust, SO 3the pollutant that acid mist, mercury etc. exist with aerosol form does not have removal ability substantially.National new " ambient air quality " requires significantly to improve, simultaneously by mercury, PM to original discharge standard 2.5include ambient air quality in.Meanwhile, up-to-date " steel sintering, pelletizing industrial air pollution thing discharge standard " (GB28662) further increases the requirement of the field such as iron and steel, sintering to dust emission.After new standard proposes, the supporting environmental protection equipment technical parameter of current domestic most sintering machine cannot reach the requirement of new standard, and this just must transform existing equipment.
Sintering flue gas desulfurization and Thermal Power Generation Industry coal-fired flue gas desulfurization similar, but due to the particularity of steel industry, sintering device handpiece flue gas after desulfurization has metallic dust, content of ashes is higher for it, the feature that flue gas corrosion is larger.Although at present Some Domestic sintering device handpiece flue gas adopts wet desulfurizing process, not obvious for the problems referred to above regulation effect.Wet electrical dust precipitator is for fine flue dust, SO 3acid mist, mercury etc. have good removal ability with the pollutant that aerosol form exists, but at present wet electrical dust precipitator is seldom applied to fume treatment after sintering machine desulfuration, and run in use also there is the problems such as efficiency of dust collection is low, reliability is poor, seriously corroded.
Utility model content:
The purpose of this utility model is, overcomes the shortcoming of prior art, provides a kind of cleaning system for sintering device handpiece flue gas terminal processes and processing method.Containing under high metallic dust, ash content and corrosive elements condition in flue gas, still can efficiently, the collaborative SO removed in flue gas 2, PM 2.5deng fine particle, heavy metal (as mercury), aerosol and wet desulphurization the SO that produces 3the multiple pollutants such as acid mist, meet the requirement of environmental protection.
In order to achieve the above object, the technical scheme of Bian is: a kind of cleaning system for sintering device handpiece flue gas terminal processes, comprise: wet electrical dust precipitator 2 and supporting alkali lye and water supply, collect, circulation and treating apparatus, described wet electrical dust precipitator 2 comprises the flue gas even distribution device 3 being placed in gas approach place, comprise spraying and rinse layer 4, spray irrigation layer 5 and the discharge electrode 6 being included in the uniform layout of flue gas area, the electric cleaner of dust collector pole 7, described discharge electrode 6 is hollow subcircular metal discharge bar, diameter 5 ~ the 35mm of discharge electrode and metal discharge bar, discharge lever both sides respectively have one M type to reinforce groove, the discharge tip of discharge electrode is triangular in shape, discharge tip is positioned at reinforces groove, the discharge tip that described discharge lever both sides reinforce in groove can be parallel or interlaced arrangement, namely arranges with tooth or side set, described dust collector pole 7 bottom is provided with guiding gutter 8, leaves space between guiding gutter 8 and dust collector pole 7, described cleaning system is arranged in desulfuration absorbing tower 1 tower or tower is arranged outward, or is placed in special turriform container, layer 4 is rinsed in spraying and spray irrigation layer 5 is provided with supporting alkali lye and water supply is collected, circulated and treating apparatus.
Described dust collector pole 7 is for multiple square hollow columnar structures and open unit jaggy and form, and relative both sides, void column unit bottom respectively have an angle to be the dihedral breach of 60 ~ 160 °; Described dust collector pole 7 bottom is provided with guiding gutter 8, leaves space between guiding gutter 8 and dust collector pole 7; Channel shape and dust collector pole match, the plane net grating texture that described guiding gutter 8 is made up of several horizontal parallel straight troughs and vertical vee gutter, and its shape and dust collector pole 7 match, and the vee gutter of guiding gutter 8 is del, and angle is 60 ~ 160 °.The dust collector pole of electric cleaner is made up of unit shown in multiple Fig. 4.The described very square hollow columnar structures have breach of gathering dust; It is alkaline substance solution that layer spraying medium is rinsed in described spraying, and pH is 7.5 ~ 10.
Described spraying is rinsed layer 4 and is made up of spray nozzle and pipeline, and its arrangement of nozzles position is positioned at the lattice plate intermediate node position of the flue gas even distribution device 3 that lattice plate is formed, and it is alkaline substance solution that layer 4 medium of spraying is rinsed in spraying, and pH is 7.5 ~ 10.Diaphragm structure can simply be interpreted as the structure being similar to flase floor, the fenestral fabric be namely welded into by many steel plate strip.
For a purification method for sintering device handpiece flue gas terminal processes, in turn include the following steps:
1) flue gas even distribution reduction of speed: flue gas is after desulfurization process, and flue gas is through the uniform reduction of speed of flue gas even distribution device;
2) flue gas conditioning: flue gas rinses layer through spraying, water smoke with alkali droplet mixes neutralizing containing acid substance in flue gas with flue gas, and atomized water adds the humidity of flue gas, impel fine particle collision, coalescence in flue gas, the particle diameter of fine particle is increased;
3) pollutant removing: through step 2) the flue gas uniform electric field that discharge electrode and dust collector pole are formed in wet electrical dust precipitator after process, pollutant in flue gas is adsorbed on dust collector pole under electric field force effect, reaches the effect multiple pollutant in flue gas being removed to process;
4) fume emission; Through step 3) after, flue gas is discharged via exhanst gas outlet, completes the purification of flue gas.
In step 3) in, by wet electrical dust precipitator to the method that flue gas carries out pollutant removing process be: discharged by electric control gear controlled discharge pole, the pollutant in flue gas is made to be adsorbed on dust collector pole under the effect of electric field, nozzle on spray irrigation layer sprays flushing water to dust collector pole, by the pollutant that is adsorbed on dust collector pole and flushing water by guiding gutter after the solid matter in mixed liquor filters by filter, clean filtrate enters flushing water collecting tank; A water part in flushing water collecting tank enters the modified tank of spray water and carries out modified to spray water, and the water that a part cannot recycle carries out harmless treatment after waste water tank is collected.
Described Wet type electric dust-removing device can be arranged in outside desulfuration absorbing tower top or desulfuration absorbing tower according to actual conditions.Need increase desulfuration absorbing tower when being arranged in desulfuration absorbing tower top and support and reinforced structure.
The beneficial effects of the utility model are: a kind of cleaning system for sintering device handpiece flue gas terminal processes that the utility model provides, for steel industry its sintering device handpiece flue gas after desulfurization has metallic dust, content of ashes is higher, the particularity that flue gas corrosion is larger is improved existing wet-esp instrument and supplies, reduce the impact on wet electrical dust precipitator dust-collecting efficiency of metallic dust in flue gas, ash content and corrosive elements, to various pollutants in fume as SO 2, PM 2.5deng particle, heavy metal (such as mercury) and SO 3acid mist, aerosol, ease ammonia etc. all can effectively remove, and improve the purification efficiency to flue gas, decrease floor space.Adopt flushing water collect and recycle the use amount that mode significantly can reduce flushing water, improve the operation stability of whole cleaning system.
Accompanying drawing illustrates:
Fig. 1 is discharge electrode cross-sectional structure schematic diagram;
Fig. 2 is discharge electrode side set facade structures schematic diagram;
Fig. 3 is that discharge electrode is with tooth facade structures schematic diagram;
Fig. 4 is single dust collector pole cellular construction schematic diagram;
Fig. 5 is guide trough structure schematic diagram shown in A direction in Fig. 4;
Fig. 6 is guide trough structure schematic diagram shown in B direction in Fig. 5;
Fig. 7 is that the relative position of spraying flushing layer nozzle and flue gas even distribution device arranges schematic diagram;
Fig. 8 is that the relative position of discharge electrode and dust collector pole arranges transverse sectional view;
Fig. 9 is that typical wet electrical dust precipitator tower arranges that flue gas bottom in and top out arranges schematic diagram outward;
Figure 10 is that typical wet electrical dust precipitator tower arranges that flue gas upper entering and lower leaving arranges schematic diagram outward;
In figure:
Detailed description of the invention:
In order to make those of ordinary skill in the art better understand the utility model, will be further detailed the utility model in conjunction with schematic diagram and embodiment.
In Fig. 9,10, desulfuration absorbing tower 1, wet electrical dust precipitator 2, flue gas even distribution device 3, spraying rinse layer 4, spray irrigation layer 5, discharge electrode 6, dust collector pole 7, guiding gutter 8, filter 9, technique water pot 10, alkali dissolving tank 11, the modified tank of spray water 12, flushing water collecting tank 13, waste water tank 14, fresh water (FW) 15, easy molten alkaline matter 16, former flue gas 17, neat stress 18.
Described very square hollow columnar structures of gathering dust, namely shown in Fig. 4,8; Wherein relatively pole plate bottom, both sides respectively has an angle to be the del breach of 60 ~ 160 °, namely shown in Fig. 4.
Described dust collector pole bottom is provided with guiding gutter, leaves space between guiding gutter and dust collector pole; The plane net grating texture that described guiding gutter is made up of several horizontal parallel straight troughs and vertical vee gutter, its shape and dust collector pole match, and guiding gutter (vee gutter) bottom is del, and angle is 60 ~ 160 °, namely shown in Fig. 5,6.Guiding gutter is accepted by the flushing liquor that spray system and dust collector pole are formed from washout phenomenon.Fig. 5 is longitudinal sectional drawing, and Fig. 6 is horizontal sectional drawing.
Described spraying is rinsed layer and is made up of spray nozzle and pipeline, and its arrangement of nozzles position is positioned at the plate intermediate node position of flue gas even distribution device, and it is alkaline water that layer spraying medium is rinsed in spraying, and pH is 7.5 ~ 10, namely shown in Fig. 7.
Fig. 1 is in discharge electrode cross-sectional structure schematic diagram; M type reinforces groove at upper-lower position, and discharge electrode side set is in groove;
Fig. 2 is discharge electrode side set facade structures schematic diagram; Also be the schematic diagram of the vertical centre vertical line of Fig. 1; Fig. 3 and Fig. 2 is similar, for discharge electrode is with tooth facade structures schematic diagram.
In Fig. 9, wet-esp unit is that bottom flue gas enters, and enter spray irrigation layer 5 through flue gas even distribution device 3, spraying again after rinsing layer 4, wet electrical dust precipitator, guiding gutter 8 is in wet electrical dust precipitator bottom.Spray irrigation layer 5 is on wet electrical dust precipitator top.
In Figure 10, wet-esp unit is that top flue gas enters, and enter wet electrical dust precipitator through flue gas even distribution device 3, spraying again after rinsing layer 4, spray irrigation layer 5, guiding gutter 8 is in wet electrical dust precipitator bottom.Spray irrigation layer 5 is on wet electrical dust precipitator top.
Embodiment 1
105m 2the former flue gas 17 of sintering device handpiece is after desulfuration absorbing tower 1 desulfurization, and the exhaust gas volumn of generation is 45 ~ 550,000 Nm 3/ h, SO 2content 150 ~ 250mg/Nm 3, containing iron powder 10 ~ 20mg/Nm 3, containing HCl, HF20mg/Nm 3, flue gas enters wet electrical dust precipitator 2 through flue by below smoke inlet, and inlet temperature is 50 DEG C ~ 65 DEG C.As shown in Figure 9, after flue gas is uniform by flue gas even distribution device 3, rinses with spraying alkaline water smoke that layer 4 formed and mix and first the acidic materials in flue gas are neutralized, and to the dust in flue gas, heavy metal (as mercury etc.), fine particle (PM 2.5/ PM 10) etc. carry out moistening modified and initial absorption, in flue gas, steam reaches capacity, for follow-up discharge electrode 6 has carried out flue gas conditioning to various contaminant particle is charged.Flue gas after modified continues rising discharge electrode 6 and discharges, and makes the dust in flue gas, metal oxide (mercury etc.), fine particulates (PM 2.5/ PM 10) and moisture subband charged, under the effect of electric field, be attached on dust collector pole 7 with charged pollutant is heavy, and rinsed by spray irrigation layer 5 pairs of dust collector pole 7 and bring pollutant into guiding gutter 8.After the solid matter in mixed liquor filters by filter 9, clean filtrate enters flushing water collecting tank 13; A water part in flushing water collecting tank 13 enters the modified tank of spray water 12 pairs of spray water and carries out modified, and the water that a part cannot recycle carries out harmless treatment after waste water tank 14 is collected.
Spray irrigation layer 4 required water is provided by fresh water (FW) 15 injection technology water pot 10; Spraying flushing water injects alkali dissolving tank 11 by technique water pot 10 and adds easy molten alkaline matter 16 (ammoniacal liquor or sodium hydroxide solution) stirring and dissolving, aqueous slkali is by the modified tank 12 of delivery pump spray injection water, mix with the water in a part of flushing water collecting tank 13 modified after, being supplied to spraying rinse layer use.
Neat stress 18 is discharged by exhanst gas outlet.In exiting flue gas, overall suspended pellet (TSP)≤15mg/Nm 3, PM 2.5≤ 17 μ g/Nm 3, Hg≤3 μ g/Nm 3, NH 3≤ 3 μ g/Nm 3, SO 3aerosol≤3 μ g/Nm 3, flue gas water content≤90g/Nm 3.
Embodiment 2
360m 2the former flue gas 17 of sintering device handpiece is after desulfuration absorbing tower 1 desulfurization, and the exhaust gas volumn of generation is 65 ~ 850,000 Nm 3/ h, SO 2content 150 ~ 250mg/Nm 3, containing iron powder 10 ~ 20mg/Nm 3, containing HCl, HF20mg/Nm 3, flue gas enters wet electrical dust precipitator 2 through flue by top smoke inlet, and inlet temperature is 50 DEG C ~ 65 DEG C.As shown in Figure 10, after flue gas is uniform by flue gas even distribution device 3, rinses with spraying alkaline water smoke that layer 4 formed and mix and first the acidic materials in flue gas are neutralized, and to the dust in flue gas, heavy metal (as mercury etc.), fine particle (PM 2.5/ PM 10) etc. carry out moistening modified and initial absorption, in flue gas, steam reaches capacity, for follow-up discharge electrode 6 has carried out flue gas conditioning to various contaminant particle is charged.Flue gas after modified continues rising discharge electrode 6 and discharges, and makes the dust in flue gas, metal oxide (mercury etc.), fine particulates (PM 2.5/ PM 10) and moisture subband charged, under the effect of electric field, be attached on dust collector pole 7 with charged pollutant is heavy, and rinsed by spray irrigation layer 5 pairs of dust collector pole 7 and bring pollutant into guiding gutter 8.After the solid matter in mixed liquor filters by filter 9, clean filtrate enters flushing water collecting tank 13; A water part in flushing water collecting tank 13 enters the modified tank of spray water 12 pairs of spray water and carries out modified, and the water that a part cannot recycle carries out harmless treatment after waste water tank 14 is collected.
Spray irrigation layer 4 required water is provided by fresh water (FW) 15 injection technology water pot 10; Spraying flushing water injects alkali dissolving tank 11 by technique water pot 10 and adds easy molten alkaline matter 16 stirring and dissolving, aqueous slkali is by the modified tank 12 of delivery pump spray injection water, mix with the water in a part of flushing water collecting tank 13 modified after, being supplied to spraying rinse layer use.
Neat stress 18 is discharged by exhanst gas outlet.In exiting flue gas, overall suspended pellet (TSP)≤10mg/Nm 3, PM 2.5≤ 15 μ g/Nm 3, Hg≤3 μ g/Nm 3, NH 3≤ 3 μ g/Nm 3, SO 3aerosol≤3 μ g/Nm 3, flue gas water content≤90g/Nm 3.
A kind of cleaning system for sintering device handpiece flue gas terminal processes that the utility model provides, particularity for its sintering device handpiece flue gas after desulfurization of steel industry is improved existing wet-esp instrument and supplies, reduce the impact on wet electrical dust precipitator dust-collecting efficiency of metallic dust in flue gas, ash content and corrosive elements, to various pollutants in fume as SO 2, PM 2.5deng particle, heavy metal (such as mercury) and SO 3acid mist, aerosol, ease ammonia etc. all can effectively remove, and improve the purification efficiency to flue gas, decrease floor space.Adopt flushing water collect and recycle the use amount that mode significantly can reduce flushing water, improve the operation stability of whole cleaning system.
It should be noted that; above content is in conjunction with concrete embodiment further detailed description of the utility model; can not assert that detailed description of the invention of the present utility model is only limitted to this; under above-mentioned guidance of the present utility model; those skilled in the art can carry out various improvement and distortion on the basis of above-described embodiment, and these improve or distortion drops in protection domain of the present utility model.

Claims (3)

1. the cleaning system for sintering device handpiece flue gas terminal processes, it is characterized in that comprising: wet electrical dust precipitator (2) and supporting alkali lye and water supply, collect, circulation and treating apparatus, described wet electrical dust precipitator (2) comprises the flue gas even distribution device (3) being placed in gas approach place, comprise spraying and rinse layer (4), spray irrigation layer (5) and be included in the discharge electrode (6) of the uniform layout of flue gas area, the electric cleaner of dust collector pole (7), described discharge electrode (6) is hollow subcircular metal discharge bar, diameter 5 ~ the 35mm of discharge electrode and metal discharge bar, discharge lever both sides respectively have one M type to reinforce groove, the discharge tip of discharge electrode is triangular in shape, discharge tip is positioned at reinforces groove, the discharge tip that described discharge lever both sides reinforce in groove can be parallel or interlaced arrangement, namely arranges with tooth or side set, described dust collector pole (7) bottom is provided with guiding gutter (8), leaves space between guiding gutter (8) and dust collector pole (7), described cleaning system is arranged in desulfuration absorbing tower (1) tower or tower is arranged outward, or is placed in special turriform container, layer (4) is rinsed in spraying and spray irrigation layer (5) is provided with supporting alkali lye and water supply is collected, circulated and treating apparatus.
2. the cleaning system for sintering device handpiece flue gas terminal processes according to claim 1, it is characterized in that described dust collector pole (7) is opened unit jaggy form for multiple square hollow columnar structures, relative both sides, void column unit bottom respectively have an angle to be the dihedral breach of 60 ~ 160 °; Described dust collector pole (7) bottom is provided with guiding gutter (8), leaves space between guiding gutter (8) and dust collector pole (7); Channel shape and dust collector pole match, the plane net grating texture that described guiding gutter (8) is made up of several horizontal parallel straight troughs and vertical vee gutter, its shape and dust collector pole (7) match, and guiding gutter (8) vee gutter is del, and angle is 60 ~ 160 °.
3. the cleaning system for sintering device handpiece flue gas terminal processes according to claim 1, it is characterized in that described spraying is rinsed layer (4) and is made up of spray nozzle and pipeline, its arrangement of nozzles position is positioned at the lattice plate intermediate node position of the flue gas even distribution device (3) that lattice plate is formed.
CN201520444831.8U 2015-06-25 2015-06-25 A clean system for sintering machine aircraft nose flue gas terminal handling Active CN205007783U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104941373A (en) * 2015-06-25 2015-09-30 南京中电环保科技有限公司 Purification system for sintering machine head smoke terminal processing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104941373A (en) * 2015-06-25 2015-09-30 南京中电环保科技有限公司 Purification system for sintering machine head smoke terminal processing

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