CN106422706A - Atomizing nozzle, desulfurization system and desulfurization method of glass melting furnace flue gas - Google Patents
Atomizing nozzle, desulfurization system and desulfurization method of glass melting furnace flue gas Download PDFInfo
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D53/34—Chemical or biological purification of waste gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Abstract
The invention discloses an atomizing nozzle, a desulfurization system of glass melting furnace flue gas and a desulfurization method of the glass melting furnace flue gas. The desulfurization system comprises a storage tank, a desulfurization tower, a bag-type dust collector and a powder bag which are sequentially connected, the atomizing nozzle and a powder gun arranged above the atomizing nozzle are arranged on the desulfurization tower, the storage tank storing desulfurization solution is connected with the atomizing nozzle of the desulfurization tower, the powder gun is connected with the powder bag, a flue gas outlet of the desulfurization tower is connected with the bag-type dust collector, and powder collected by the bag-type dust collector is connected to the powder bag through a powder collection port. According to the desulfurization system and the desulfurization method, by the aid of a wet desulphurization method with high desulphurization efficiency and a dry desulphurization method with low moisture of desulfurized flue gas, SO2 in the flue gas can be effectively removed, water-vapor content in the flue gas is reduced, subsequent bag-type dust collecting process is facilitated, the concentration of the SO2 in desulfurized glass melting furnace flue gas is reduced by 95% or more and reaches national emission standards; moreover, no industrial wastewater generates, secondary pollution is low, and the desulfurization system is easy to operate, popularize and apply.
Description
Technical field
The present invention relates to industrial melting furnaces fume treatment technical field, more particularly to a kind of atomizer, use this atomization
The desulphurization system of the flue gas of glass melting furnace of shower nozzle and sulfur method associated with dry method wet method.
Background technology
National glass production line quantity is a lot of at present, has 300 a plurality of flat glass production lines.Glass industry is as its people
One of economic basic industry, is energy consumption rich and influential family, is seriously polluted industry again, the Air Pollutant Emission problem of glass melter
Become the key factor of restriction glass industry sustainable development.Adopting the stone of middle and high sulfur content at present domestic glass industry more
, as fuel or petroleum coke+heavy oil fuel combination, according to statistics, 55% with petroleum coke powder as fuel for oil coke, and 25% with heavy oil for combustion
Material, remaining 20% about with natural gas, coal gas as fuel.The flue gas of glass melting furnace temperature producing after fuel combustion is high, dust
Content is big, the complicated component of flue gas and dust, in conjunction with field monitoring data, pollutes using in the flue gas of glass melting furnace of different fuel
Thing content is different, is specifically shown in Table 1.
Pollutant load situation in table 1 different fuel flue gas
| Fuel | Dust concentration (mg/m3) | SO2Concentration (mg/m3) | NOXConcentration (mg/m3) |
| Natural gas/coal gas | 80～280 | 100～500 | 1800～2870 |
| Heavy oil | 150～900 | 1500～4000 | 1850～3000 |
| Petroleum coke powder | 200～1200 | 200～6500 | 1800～3300 |
It can be seen that, SO in flue gas of glass melting furnace2And NOxIt is major pollutants, wherein SO2It is the main cause that acid rain is formed, because
This its concentration of emission is environmental regulation to one of Con trolling index of glass production enterprise fume emission it is desirable to be ultimately discharged into air
SO in flue gas2Content must not be higher than 400mg/Nm3, NOxContent must not be higher than 700mg/Nm3.Therefore, the cigarette that glass melter produces
Gas need through desulfurization and denitration so as in SO2And NOxContent just can enter air after meeting regulation.
At present, flue gas of glass melting furnace first carries out electric precipitation and then denitration, lower the temperature again quenched after flue gas carry out desulfurization, take off
Sulfur mainly adopts three kinds of methods such as dry desulfurization, semi-dry desulphurization and wet desulphurization.
Dry desulfurization is to carry out desulfurization under the completely dried state of no liquid phase intervention, and desulfurization product is powdered, commonly uses
Desulfurizing agent have in-furnace calcium spraying (lime/lime stone) or metal etc., for the SO in heat absorbing glass melting furnaces flue gas2.The method
Advantage be that smoke moisture is little, be conducive to follow-up dedusting and flue gas emptying, be disadvantageous in that desulfuration efficiency is low it is difficult to reach row
Put standard.
Semi-dry desulphurization is the moisture being evaporated using flue gas of glass melting furnace sensible heat in slurry desulfurizing agent, in the process of evaporation
SO in middle flue gas of glass melting furnace2With the alkali metal reacting generating salt in desulfurizing agent or sulphite, and make final product
For powdered, semidry method using more be spray dry desulfurization, circulating fluid bed flue-gas desulfurizing etc..The advantage of the method is that do not have
Water is had to add, flue gas relatively dry, do not produce waste water, be disadvantageous in that desulfuration efficiency is low, equipment is huge.
Wet desulphurization is at present using sulfur method the widest, accounts for more than the 80% of desulfurization total amount.The method is using to cigarette
In gas spray aqueous slkali, aqueous slkali contact with flue gas of glass melting furnace and with SO therein2Reaction, by SO therein2Remove, desulfurization
Flue gas can discharge after dehydration afterwards.The method can remove in flue gas 90% SO2, it is that current desulfuration efficiency is best, warp
One of method of Ji.
However, wet desulphurization yet suffers from three insoluble greatly problems, one is corrosivity, absorbs SO2Aqueous slkali be
Recycle, alkaline matter is regular input, rather than continuous input, and therefore after the desulfurization in later stage, waste liquid is in acidity, acid solution
Corrosion to equipment is very big, is the one of the main reasons that current desulphurization plant damages；Two is blocking, insoluble in product after desulfurization
Thing (calcium sulfate or calcium sulfite) easily blocking pipeline or in desulfurizing tower local scaling, cause reaction tower interior air-flow uneven
Even, have a strong impact on desulfuration efficiency, cause equipment to run difficult；Three is that flue gas after desulfurization also will be dehydrated, but dehydration can only be taken off
The water of liquid, declines with flue-gas temperature, and the elutriation in flue gas goes out, and the water droplet of precipitation has a large amount of micronic dusts in containing, can be with flue gas row
Put, become the main source of pm2.5, if being by dedusting, again can be high because of flue gas moisture content, cause the stifled of dust arrester
Plug.
Disclose a kind of wet desulphurization device in the patent application of Application No. 20140455024.6 to fill with semi-dry desulphurization
Put the devulcanizer of tandem compound, still have waste water to produce with this devulcanizer desulfurization, and required dry powder amount of lime when dehumidifying is very big, warp
Unreasonable in Ji.Disclose a kind of novel glass melting furnaces flue gas in the patent application of Application No. patent 201210474618.2 to do
The quenched desulfurization integrated device of method, this device adopts dry desulfurization, and desulfurized effect is poor, and flue gas resistance is big, needs high-power cigarette
Gas pressuring machine.Disclose a kind of semidry method high-efficiency desulfurization that is spray-dried in the patent application of Application No. 201220161028.X to fill
Put, using atomization desulfurization semi-dry desulphurization, in flue gas after desulfurization, smoke content height must dust removal process could discharge, but during dedusting
Easily cause cloth bag blocking.
In sum, current flue gas of glass melting furnace administers SO2Difficulty big, high cost, is urgently to be resolved hurrily the asking in this area
Topic.
Content of the invention
The purpose of the present invention is for technological deficiency present in prior art, in a first aspect, providing one kind not consume pressure
Contracting air, the little atomizer of droplet, including feed tube and the spherical cavity being located at described feed tube one end, in spherical cavity uniform several
Nozzle (preferably 20-30), spherical cavity, nozzle connect with inside feed tube, and described nozzle includes base and the cone cap of hollow tubular,
The inner hollow tubular space of described base forms nozzle passage, and base one end open is simultaneously connected with spherical cavity, and the other end is closed simultaneously
By thread set in cone cap, the base end being sleeved in cone cap is provided with several desulfurization fluid apertures and is communicated with nozzle passage,
Cone crown end is provided with horn mouth, has gap identical with horn mouth between base and cone cap.
Described gap is can be by the slit of threaded adjustment size between base and cone cap, and described slit is near spherical cavity
One end is annular, and tapered in one end of close cone cap, slit size is 0.05-0.1mm.
Described desulfurization fluid apertures has 4-7, a diameter of 2-3mm.
Second aspect, the present invention provides a kind of desulphurization system of efficient flue gas of glass melting furnace, including the storage being sequentially connected
There are storage tank, desulfurizing tower, sack cleaner and the powder bag of doctor solution, desulfurizing tower is provided with above-mentioned atomizer and is located at described mist
Change the powder rifle above shower nozzle, storage tank is connected with the atomizer of desulfurizing tower, powder rifle is connected with powder bag, the exhanst gas outlet of desulfurizing tower and
Sack cleaner is connected, and sack cleaner is connected to powder bag by powder collection port.
The tower body of described desulfurizing tower is the shell of welded steel plate, and inside the shell sets anticorrosive coat, and desulfurization tower bottom is provided with row
Grey mouth, bottom is provided with flue, is provided with positioned at desulfurizing tower shaft core position for being atomized doctor solution at 500-1000mm above flue
Described atomizer (best two to three layers, every interlayer is every 500-1000mm), the desulfurization of 500-1000mm above atomizer
Shell is provided with powder rifle (arrives two-layer, and every interlayer, every 500-1000mm, stretches into 10-15mm in desulfurizing tower), and top is provided with cigarette
Gas exports.
Described atomizer is connected with pressuring machine and storage tank successively by doctor solution pipeline, the preferred moulding pressure of pressuring machine
For 4-6MPa；Described powder rifle is connected with feed screw and powder bag successively by powder duct, the pressure of input in feed screw
The ratio of contracting air and powder is 1m3Compressed air is than 5-10kg powder.
Described sack cleaner front end is entrance, and rear end is outlet, and bottom front is provided with powder collection port, and rear end is provided with useless
Grey collection port, entrance is connected with the exhanst gas outlet of desulfurization top of tower, and outlet is connected with chimney, leads to air, powder collection port and powder
Bag is connected.
The third aspect, the present invention provides sulfur method associated with a kind of efficient flue gas of glass melting furnace dry method wet method, uses
Above-mentioned desulphurization system, the flue gas of glass melting furnace after denitration, dedusting, heat exchange is passed through in desulfurizing tower, first sprays with atomizer
Doctor solution reacts, and removes most of SO in flue gas2, then the powdered reaction spraying with powder rifle, remove the moisture in flue gas and residue
SO2, after continuing to be passed through sack cleaner dedusting, enter air.
Comprise the following steps：
(1) flue gas of glass melting furnace (about 80-100 DEG C of temperature) after denitration, dedusting, heat exchange is entered desulfurizing tower by flue
In, the doctor solution of the atomization being sprayed with atomizer is contacted and is sufficiently mixed and carries out wet desulphurization, by the SO in flue gas2Absorb,
During doctor solution atomization, moisture is evaporated in flue gas, obtains containing a small amount of SO2Once desulfurization flue gas with water vapour；
(2) feed screw using compressed air, the powder in powder cabin is delivered in powder rifle, the once desulfurization of step (1)
Flue gas continues to rise the powder contact spraying with powder rifle and be sufficiently mixed and carry out dry desulfurization, powder absorb water in flue gas and
SO2, obtain the secondary desulfuration flue gas containing dust；
(3), after the secondary desulfuration flue gas entrance sack cleaner of step (2) carries out dedusting, air, secondary desulfuration cigarette are entered
Dust in gas is collected because of action of gravity, and the dust in dust is back in powder cabin by powder collection port, circulation profit
With the ash that gives up is discharged by useless ash collection port, is used for preparing doctor solution.
Described doctor solution by weight, including 15-20 part sodium hydroxide, 5-10 part calcium hydroxide and 70-80 part water, is pressed
Power is 4-6MPa；Optionally, described powder is alkaline earth oxide, preferably calcium oxide dry powder, and granularity is 200 mesh.
Compared with prior art, the invention has the beneficial effects as follows：
1) atomizer of the present invention leans on doctor solution pressure atomization, not consumption of compressed air, and droplet is little, uniformly, can be uniformly
Mix with flue gas, more effectively remove smoke middle sulfide.2) present invention is by cigarette after wet desulphurization method high for desulfuration efficiency and desulfurization
Air water divides low dry desulfurization method to combine, and both efficiency removed the SO in flue gas2, decrease vapour content in flue gas again,
Be conducive to the carrying out of follow-up cloth bag dedusting process.3) present invention is used for desulfurization and the dry powder except vapor can reclaim and repeat to make
With reducing the waste of resource, also reducing the operating cost of desulfurization.4) present invention using first wet desulphurization again dry method dry de-
Sulfur mode, decreases the droplet in flue gas, also just decreases the dust that droplet is taken out of, greatly reduces the discharge of pm2.5.5) profit
SO in flue gas of glass melting furnace can be made with this inventive method2Concentration reduces by more than 95%, reaches GB discharge standard；And do not produce
Raw industrial wastewater, secondary pollution little it is easy to operation and popularization and application.6) in flue gas after desulfurization, moisture declines more than 80%, flue gas
Next step bag-type dust process can directly be carried out, flue gas micronic dust declines more than 90%, reaches GB discharge standard.
Brief description
Fig. 1 show the structural representation of the desulphurization system of the present invention；
Fig. 2 show the cross-sectional view of the desulfurizing tower powder rifle layer of the present invention；
Fig. 3 show the structural representation of powder rifle of the present invention；
Fig. 4 show the structural representation of atomizer of the present invention；
Fig. 5 show the structural representation of nozzle of the present invention.
Specific embodiment
The desulphurization system of flue gas of glass melting furnace that the present invention provides and sulfur method are based on following operation principle：Glass melts
Kiln flue gas enters the desulphurization system of the present invention after denitration, heat exchange, and about 80-100 DEG C of flue-gas temperature, in desulfurizing tower bottom and atomization
Doctor solution carry out wet desulphurization, atomization doctor solution is sufficiently mixed with flue gas, SO in flue gas2React with doctor solution, such as formula I-formula
Ⅱ：
2NaOH+SO2=Na2SO3+H2O formula I
Ca(OH)2+SO2=CaSO3+H2O formula II；
More than 85% SO in flue gas2It is desulfurized liquid to absorb, do not produce waste water, the moisture that above-mentioned formula I-formula II reaction produces
The moisture producing with doctor solution evaporation rises with flue gas, with alkaline earth oxide (may be simply referred to as dry powder) in the middle part of desulfurizing tower
Mixing carries out dry desulfurization, the SO of residual in the moisture in dry powder and flue gas and flue gas2Reaction, such as formula III-formula IV：
CaO+H2O=Ca (OH)2Formula III
Ca(OH)2+SO2=CaSO3+H2O formula IV；
Reaction of moisture in CaO and flue gas in dry powder, by the moisture absorption in flue gas, the fraction Ca (OH) of generation2With
SO in flue gas2Reaction, the SO of residual in flue gas2Absorbed, the moisture that simultaneous reactions generate also is absorbed by dry powder, moisture and SO2Contain
Amount all reduces, and obtains desulfurization fume, has reached desulfurization and the purpose of dehydration simultaneously.Flue gas after desulfurization dewatering removes through cloth bag again
Dirt device dedusting, wherein unreacted dry powder is collected, and re-uses.
Below in conjunction with specific embodiment, further illustrate present disclosure, and the present invention is further elaborated, but
These embodiments limit the invention absolutely not.
In conjunction with Fig. 1, the desulphurization system of the present invention is described further, desulphurization system proposed by the present invention includes connecting successively
Storage tank 10, desulfurizing tower 1, sack cleaner 6 and the powder bag 7 connecing.
The shell 14 of desulfurizing tower 1 is formed by A3 welded steel plate, inside sets anticorrosive coat 15, and anticorrosive coat is anti-corrosion cement or cast stone
Deng as shown in Figure 2.Desulfurizing tower 1 bottom is provided with flue 4, and for being passed through flue gas, bottom is provided with ash discharging hole 5, in desulfurizing tower 1 away from
The position of flue 4 top 500-1000mm arranges two to three layers of atomizer 3, and the spacing of adjacent two layers atomizer 3 is 500-
1000mm, the head of atomizer 3 extends the shaft core position of desulfurizing tower 1.Atomizer 3 top 500-1000mm away from the superiors
One to two layers of powder rifle 2 of place's setting, powder rifle 2 is located on desulfurization shell 4, and its head puts in 10-15mm in desulfurizing tower, every layer of powder rifle
Spacing be 500-1000mm, as shown in Fig. 2 powder rifle 2 props up along the cross-sectional circumferential setting 3-5 of desulfurizing tower 1, and be uniformly distributed.
Desulfurizing tower 1 top is provided with exhanst gas outlet 51, and is connected with the entrance of sack cleaner 6 by discharge flue 24.
Atomizer 3 is passed sequentially through doctor solution pipeline 13 and is connected with storage tank 10 with pressuring machine 8, and pressuring machine 8 is by storage tank 10
The doctor solution of storage is forced into 4-6MPa, is transported to atomizer 3 through doctor solution pipeline 13 and is atomized, then sprays into desulfurizing tower 1
In, wet desulphurization is carried out to flue gas.Atomizer 3 is made up of 304 rustless steels, as shown in figure 4, being connected by feed tube 19 and spherical cavity 20
Connect and form, spherical cavity 20 is evenly equipped with 20-30 nozzle 21, nozzle 21 is threaded connection or is welded in spherical cavity 20.As Fig. 5
Shown, nozzle 21 is made up of the base 22 of hollow and cone cap 23, and base 22 is a hollow circular tube, and hollow space forms nozzle passage
24, base 22 one end is connected spherical cavity 20 and is communicated with spherical cavity by internal nozzle passage 24, and the other end is along the circle of hollow circular tube
It is provided with the desulfurization fluid apertures 25 of 4-7 a diameter of 2-3mm week, the end of base 22 other end is taper and closing.Cone cap 23 passes through
Thread set is at the conical closure end of base 22, and has gap 26 and base 22 between, and gap 26 is a slit, near spherical cavity
20 one end is annular, the other end of close cone cap is tapered.The nozzle passage of desulfurization fluid apertures 25 and base 22 is passed through in gap 26
24 communicate.Cone crown portion is provided with horn mouth 27, is communicated with nozzle passage 24 by gap 26, for spraying doctor solution.Use
When, doctor solution enters spherical cavity 20 by the feed tube 19 of atomizer 3, then enters gap by nozzle passage 24 and desulfurization fluid apertures 25
Sprayed by horn mouth 27 after 26, enter in desulfurizing tower.By adjusting the relative position of base 22 and cone cap 23, revolved by screw thread
Enter and screw out adjustment base 22 and be sleeved on the size to control gap 26 for the length boring in cap 23, make slit size be 0.05-
0.1mm.By adjust gap 26 size, can control fogging degree and spraying distance, with adapt to different size of tower body and
Flue gas air inflow, the flue gas of heterogeneity.This atomizer 3 leans on doctor solution pressure atomization, not consumption of compressed air, and droplet is little,
Uniformly, can uniformly mix with flue gas, more effectively remove smoke middle sulfide.
Powder rifle 2 is passed sequentially through powder hose 12 and is connected with powder bag 7 with feed screw 9, the alkaline-earth metal oxide in powder bag 7
Thing powder is transported to powder rifle 2 through powder hose 12 in the presence of auger conveyor 9 and compressed air, then sprays in desulfurizing tower 1,
Dry desulfurization is carried out to the flue gas after wet desulphurization.Powder rifle 2 is welded by 304 rustless steels, as shown in figure 3, one end is dry powder
Outlet, the other end is dry powder import 16, and on powder rifle 2, the position near dry powder import 16 is provided with compressed air inlet 18, is leaning on
The position of nearly dry powder outlet is provided with baffle plate 17, does not leak for blocking flue gas in tower.
Sack cleaner 6 front end is the entrance of flue gas after desulfurization, is connected with desulfurizing tower 1, and rear end is flue gas after desulfurization and dedusting
Outlet, be connected (approach axis of sack cleaner flue gas are front, and the discharge direction of flue gas is rear) with chimney 25, to desulfurization cigarette
Gas carries out dust removal process, and after dedusting, flue gas enters air.The dust removing include granule is big, water content is high, heavier useless ash and
The dust that granule is little, water content is low, lighter.Useless ash can carry out in sack cleaner because gravity is different separating with dust, gentlier
Dust first settle down, can be collected in the front bottom end of sack cleaner, because in dust, main component is to have neither part nor lot in
The alkaline earth metallic oxide powder end of reaction and dry desulfurization reacted alkaline earth metal hydroxide powder, therefore can return to powder bag
Reuse in 7.Settle down after heavier useless ash, can be collected in the rear end bottom of sack cleaner, ash alkalescence of giving up is big,
Can be used for preparing doctor solution, increase operation rate.Therefore, sack cleaner 6 bottom front is provided with powder collection port 52 for taking off
Dust collection in sulfur flue gas gets up, and bottom rear end is provided with useless ash outlet 53 for gathering up the useless ash in desulfurization fume
Come.The powder collection port 52 of sack cleaner 6 is connected with powder cabin 7, and the dust being collected in sack cleaner 6 passes through powder
Collection port 52 enters powder cabin 7, together with the new dry powder adding through feeding screw 9 under high-pressure blast conveying, through powder hose 12
Enter powder rifle 2, be sprayed onto in desulfurizing tower, realize recycling.The useless ash being collected in sack cleaner 6 is discharged by useless ash
Mouth 53 discharge, is used for preparing doctor solution, subsequently into storage tank 10, enters mist through doctor solution pipeline 13 under the pressure of pressuring machine 8
Change shower nozzle 3, be sprayed onto in desulfurizing tower, improve utilization ratio.
On this basis, present invention also offers a kind of desulfurization side using above-mentioned desulphurization system to flue gas of glass melting furnace
Method, comprises the following steps：
(1) flue gas of glass melting furnace after denitration, dedusting, heat exchange (about 80-100 DEG C of temperature) enters desulfurization by flue 4
In tower 1, the doctor solution of the atomization being sprayed with atomizer 3 is contacted and is sufficiently mixed, by the SO in flue gas2Absorb, realize wet method
Desulfurization, the moisture in the doctor solution being simultaneously atomized is evaporated in flue gas, obtains once desulfurization flue gas and (wherein contains a small amount of
SO2And water vapour)；
Doctor solution includes 15-20 part sodium hydroxide, 5-10 part calcium hydroxide, 70-80 part water by weight, and pressure is 4-
6MPa, the SO in flue gas during this2Generate sodium sulfite, sulfurous acid with the sodium hydroxide in doctor solution and calcium hydroxide reaction
Calcium and water, by the SO in flue gas2Remove；If alkaline matter (NaOH and Ca (OH) in doctor solution2) excessive concentration, easily crystallize, make
Become atomizer blocking, concentration is too low then to affect desulfurized effect；The pressure of doctor solution is the power resources of atomization, too high causes energy
Source wastes, and too low atomizing effect is poor.
(2) the once desulfurization flue gas of step (1) is continued to rise and is contacted simultaneously with the alkaline earth metallic oxide powder end of powder rifle 2 ejection
It is sufficiently mixed, absorbs the water generating alkaline earth metal hydroxide in flue gas, alkaline earth metal hydroxide remains with flue gas simultaneously
SO2Contact, absorbs SO further2, carry out dry desulfurization, obtain secondary desulfuration flue gas and (wherein contain unreacted dry powder and life
The alkaline earth metal hydroxide becoming)；Alkaline earth metallic oxide powder end is commercial products, typically adopts calcium oxide dry powder, dry powder grain
Spend for 200 mesh, feed screw using compressed air, the alkaline earth metallic oxide powder end in powder cabin 2 is delivered in powder rifle 2, pressure
Contracting air is 1m with the mixed proportion at alkaline earth metallic oxide powder end3Compressed air conveys 5-10kg alkaline earth metallic oxide powder
End, the water in flue gas during this reacts generation alkaline earth metal hydroxide with the alkaline earth oxide in dry powder, by flue gas
In water remove, the SO of residual in the alkaline earth metal hydroxide of generation and flue gas2Reaction generates alkaline-earth metal sulfurous acid compound,
By the SO in flue gas2Remove further.
(3), after the secondary desulfuration flue gas entrance sack cleaner of step (2) carries out dedusting, air, secondary desulfuration cigarette are entered
Dust in gas is separated into dust and useless ash because of action of gravity, and dust is the alkaline-earth metal of unreacted dry powder and generation in a large number
Hydroxide powder, and be back in powder cabin by powder collection port, recycle；Useless ash is discharged by useless ash collection port, uses
To prepare doctor solution.
, when using, atomizer sprays into doctor solution and powder rifle sprays into alkali for the desulphurization system of present invention offer and sulfur method
Soil metal oxide is carried out simultaneously, and flue gas is first contacted with doctor solution, the SO of wherein most2It is desulfurized the basic species in liquid
Matter absorbs, and the doctor solution spraying into all vaporizes, and does not have waste liquid to produce；Then the moisture of doctor solution gasification continues up fortune with flue gas
OK, contact with alkaline earth metallic oxide powder end, the moisture in flue gas and remaining SO2Absorbed, the alkaline-earth metal that reaction generates
Hydroxide powder continues up operation with the part alkaline earth metallic oxide powder end with smoke reaction with flue gas, in the middle part of flue gas
Divide granule big powder, decline under gravity, discharged by ash discharging hole 51 timing of desulfurization tower bottom, can return after discharge
Receive and utilize, be generally available to prepare doctor solution；In flue gas, the little dust of granule carries out dedusting with flue gas entrance sack cleaner, removes
After dirt, flue gas reaches discharge standard, is directly discharged into air, and the dust settling in dust gets off and enters powder bag by powder collection port,
Re-use, the useless ash in dust is discharged by useless ash outlet.
Embodiment 1：
, exhaust gas volumn is 90000Nm per hour taking 600 tons of floatation glass production lines as a example3, flue-gas temperature be 100 degree, flue gas
Middle SO2Content is 1850mg/Nm3, doctor solution adopt sodium hydroxide be 15 parts, 10 parts of calcium hydroxide, 75 parts of water.Desulfurizing tower internal diameter
3m, doctor solution consumption 600kg per hour, atomizer arranges two layers, and first floor atomizer edge on smoke inlet is 800mm, mist
Change shower nozzle interlamellar spacing is 500mm, continues to rise through doctor solution desulfurization fume, and it is 1000kg/h that dry powder adds dry powder calcium oxide content,
Powder rifle arranges two layers, and first floor powder rifle is 800mm away from upper strata atomizer distance, and powder rifle interlamellar spacing 500mm, along desulfurizing tower circumference
Long, 3 powder rifles are set, uniformly.Take off device, SO in flue gas through the desulfurization of the present invention2Content is 80mg/Nm3, reach GB row
Put standard, desulfuration efficiency is 95.7%.
Embodiment 2：
, exhaust gas volumn is 120000Nm per hour taking 900 tons of floatation glass production lines as a example3, flue-gas temperature be 80 degree, flue gas
Middle SO2Content is 2400mg/Nm3, doctor solution adopt sodium hydroxide be 20 parts, 5 parts of calcium hydroxide, 75 parts of water.Desulfurizing tower internal diameter
4m, doctor solution consumption 900kg per hour, atomizer arranges three layers, and first floor atomizer edge on smoke inlet is 1000mm, mist
Change shower nozzle interlamellar spacing is 800mm, continues to rise through doctor solution desulfurization fume, and it is 1500kg/h that dry powder adds dry powder calcium oxide content,
Powder rifle arranges two layers, and first floor powder rifle is 1000mm away from upper strata atomizer distance, and powder rifle interlamellar spacing 800mm, along desulfurizing tower circumference
Long, 5 powder rifles are set, uniformly.Take off device, SO in flue gas through the desulfurization of the present invention2Content is 95mg/Nm3, reach GB row
Put standard, desulfuration efficiency is 96.0%.
The desulphurization system of the present invention and sulfur method is used to process flue gas of glass melting furnace as can be seen from the above embodiments, due to
Structure of Flue Gas Desulfuration Absorbing is simple, and sweetening process path is short, does not turn round and dead angle, does not also have barrier plate etc to stop that flue gas is advanced and hinders
Power, therefore air drag are little, and desulfuration efficiency height, it is important to flue gas moisture content is low, beneficial to later stage flue gas bag-type dust, empties
Flue gas does not result in the rising of pm2.5.
The above is only the preferred embodiment of the present invention it is noted that common skill for the art
For art personnel, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications
Also should be regarded as present disclosure.
Claims (10)
1. a kind of atomizer is it is characterised in that including feed tube and the spherical cavity being located at described feed tube one end, uniform in spherical cavity
Several nozzles (preferably 20-30), spherical cavity, nozzle connect with inside feed tube, and described nozzle includes the base of hollow tubular
With cone cap, the inner hollow tubular space formation nozzle passage of described base, base one end open is simultaneously connected with spherical cavity, the other end
Close and pass through thread set in cone cap, the base end being sleeved in cone cap is provided with several desulfurization fluid apertures and nozzle passage
Communicate, cone crown end is provided with horn mouth, between base and cone cap, have gap identical with horn mouth.
2. according to claim 1 atomizer it is characterised in that described gap be can by base and cone cap between screw thread
Adjusted size of slit, described slit is being annular near one end of spherical cavity, in tapered, the slit size near one end of cone cap
For 0.05-0.1mm.
3. according to claim 2 atomizer it is characterised in that described desulfurization fluid apertures has 4-7, a diameter of 2-3mm.
4. a kind of desulphurization system of flue gas of glass melting furnace, stores the storage tank of doctor solution, desulfurizing tower, cloth bag including be sequentially connected
Cleaner unit and powder bag are it is characterised in that desulfurizing tower is provided with the arbitrary described atomizer of claim 1-3 and is located at described atomization
Powder rifle above shower nozzle, storage tank is connected with the atomizer of desulfurizing tower, and powder rifle is connected with powder bag, the exhanst gas outlet of desulfurizing tower and cloth
Bag dust collector is connected, and sack cleaner is connected to powder bag by powder collection port.
5. according to claim 4 desulphurization system it is characterised in that the tower body of described desulfurizing tower is outer for welded steel plate
Shell, inside the shell sets anticorrosive coat, and desulfurization tower bottom is provided with ash discharging hole, and bottom is provided with flue, is provided with 500-1000mm above flue
Positioned at desulfurizing tower shaft core position, for being atomized the described atomizer of doctor solution, (best two to three layers, every interlayer is every 500-
1000mm), above atomizer the desulfurization shell of 500-1000mm be provided with powder rifle (one arrive two-layer, every interlayer is every 500-
1000mm, stretches into 10-15mm in desulfurizing tower), top is provided with exhanst gas outlet.
6. according to claim 4 or 5 desulphurization system it is characterised in that described atomizer pass through doctor solution pipeline successively
It is connected with pressuring machine and storage tank, the preferred moulding pressure of pressuring machine is 4-6MPa；Described powder rifle pass through powder duct successively with spiral shell
Rotation feeder is connected with powder bag, and in feed screw, the ratio of the compressed air of input and powder is 1m3Compressed air compares 5-
10kg powder.
7. according to claim 5 or 6 desulphurization system it is characterised in that described sack cleaner front end be entrance, rear end is
Outlet, bottom front is provided with powder collection port, and rear end is provided with useless ash collection port, the exhanst gas outlet phase of entrance and desulfurization top of tower
Even, outlet is connected with chimney, leads to air, powder collection port is connected with powder bag.
8. sulfur method associated with a kind of flue gas of glass melting furnace dry method wet method is it is characterised in that usage right requires the arbitrary institute of 4-7
State desulphurization system, the flue gas of glass melting furnace after denitration, dedusting, heat exchange is passed through in desulfurizing tower, first spray with atomizer is de-
Sulfur liquid reacts, and removes most of SO in flue gas2, then the powdered reaction spraying with powder rifle, remove the moisture and remaining in flue gas
SO2, after continuing to be passed through sack cleaner dedusting, enter air.
9. according to claim 8 sulfur method it is characterised in that comprising the following steps：
(1) flue gas of glass melting furnace (about 80-100 DEG C of temperature) after denitration, dedusting, heat exchange is entered in desulfurizing tower by flue,
The doctor solution of the atomization being sprayed with atomizer is contacted and is sufficiently mixed and carries out wet desulphurization, by the SO in flue gas2Absorb, desulfurization
During liquid mist, moisture is evaporated in flue gas, obtains containing a small amount of SO2Once desulfurization flue gas with water vapour；
(2) feed screw using compressed air, the powder in powder cabin is delivered in powder rifle, the once desulfurization flue gas of step (1)
Continue to rise the powder contact spraying with powder rifle and be sufficiently mixed and carry out dry desulfurization, powder absorbs water and SO in flue gas2, obtain
Arrive the secondary desulfuration flue gas containing dust；
(3), after the secondary desulfuration flue gas entrance sack cleaner of step (2) carries out dedusting, enter air, in secondary desulfuration flue gas
Dust be collected because of action of gravity, the dust in dust is back in powder cabin by powder collection port, recycles, and gives up
Ash is discharged by useless ash collection port, is used for preparing doctor solution.
10. according to claim 8 or claim 9 sulfur method it is characterised in that described doctor solution by weight, including 15-20
Part sodium hydroxide, 5-10 part calcium hydroxide and 70-80 part water, pressure is 4-6MPa；Optionally, described powder is alkaline-earth metal oxygen
Compound, preferably calcium oxide dry powder, granularity is 200 mesh.
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| CN107497279A (en) * | 2017-08-16 | 2017-12-22 | 盐城市兰丰环境工程科技有限公司 | A kind of spray drying process desulfurizer |
| CN110368800A (en) * | 2019-08-09 | 2019-10-25 | 浙江大学 | Sodium base flue gas desulfurization byproduct processing unit and processing method |
| CN110394049A (en) * | 2019-07-11 | 2019-11-01 | 昆明理工大学 | An electrolytic aluminum fluorine-containing flue gas purification system and purification process |
| CN110898657A (en) * | 2019-03-07 | 2020-03-24 | 安徽欣创节能环保科技股份有限公司 | Multi-point powder spraying desulfurization system based on SDA method |
| CN111408262A (en) * | 2020-04-29 | 2020-07-14 | 江苏琥珀环境技术有限公司 | Device and method for dedusting and purifying tail gas of glass melting furnace |
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| CN111408262A (en) * | 2020-04-29 | 2020-07-14 | 江苏琥珀环境技术有限公司 | Device and method for dedusting and purifying tail gas of glass melting furnace |
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