CN106139846A - A kind of sintering device flue gas dry desulfurization urea liquid direct-injection denitrification apparatus - Google Patents
A kind of sintering device flue gas dry desulfurization urea liquid direct-injection denitrification apparatus Download PDFInfo
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- CN106139846A CN106139846A CN201510173609.3A CN201510173609A CN106139846A CN 106139846 A CN106139846 A CN 106139846A CN 201510173609 A CN201510173609 A CN 201510173609A CN 106139846 A CN106139846 A CN 106139846A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
A kind of sintering device flue gas dry desulfurization urea liquid direct-injection denitrification apparatus, including sintering machine, bellows, flue gas Online Monitoring Control device, electronic air inlet valve, reaction tower, sack cleaner, blower fan, chimney, it is characterized in that: sintering machine is linked in sequence bellows, flue gas Online Monitoring Control device, electronic air inlet valve, reaction tower, sack cleaner, blower fan, chimney, it is connected between described bellows with flue gas Online Monitoring Control device and has electric flow control valve, described flue gas Online Monitoring Control device connects PLC control cabinet, PLC control cabinet connects frequency conversion rotary feeder, frequency conversion rotary feeder is connected above electron helical and claims, electron helical claims to connect discharger, discharger connects urea granules feed bin, it is connected with jet mixer top below frequency conversion rotary feeder.The present invention can remove the SO in sintering device flue gas2The noxious pollutants such as gas, nitrogen oxides, dioxin, heavy metal, make flue gas qualified discharge, it is to avoid to environment.
Description
Technical field
The present invention relates to the desulphurization denitration equipment of a kind of flue gas, especially relate to a kind of sintering device flue gas dry method and take off
Thiourea solution direct-injection denitrification apparatus, belongs to environmental technology field.
Background technology
At present, coke powder used by SINTERING PRODUCTION and coal dust are during 1200 DEG C of high-temperature firings of sintered machine, former
In material, sulfur, nitrogen generate SO through chemical reaction2, NOx enter sintering flue gas, sintering machine discharge SO2, NOx accounts for
To domestic SO2, a big chunk of NOx emission total amount, be the emission source being only second to thermal power plant, according to burning
The analysis of knot flue gas, has a following features:
(1) change of sintering so2 concentration in flue gas is very fast and fluctuation of concentration amplitude greatly；
(2) flue-gas temperature of sintering discharge generally fluctuates between 100 DEG C～150 DEG C；
(3) dust concentration in sintering flue gas is substantially at 20g/Nm3To 30g/Nm3Between change；
(4) oxygen content of sintering discharge flue gas changes between 14%～18%, and SO in flue gas2Concentration
There is certain corresponding relation in change and the change of oxygen content: the SO in flue gas when oxygen content is on the low side2Concentration is inclined
High；SO in flue gas when oxygen content is higher2Concentration is on the low side；
(5) about containing the nitrogen (by mass) of 0.5～2% in coal, oxidation forms NOx in combustion；
Concentration is substantially at 300mg/Nm3To 400mg/Nm3Between change；
(6) water capacity of sintering discharge flue gas is relatively big, generally fluctuates between 8%～10.5%.
In sum, the flue-gas temperature of sintering machine is relatively low, mostly between 100～150 DEG C, residing
Flue gas environmental condition is relatively more severe, oxygen content as higher in dust concentration, flue gas is higher, water capacity is relatively big,
Heavy metal concentration is more high, sintering device handpiece flue gas SO2Concentration of emission reach 2000～3000mg/Nm3, NOx
Concentration reaches 300～400mg/Nm3, environment is caused severe contamination.
In prior art, denitrating technique is mainly with ammonia as reducing agent, uses Manual material feeding, and device is automatic
Change degree is the highest；Then carry out removing SO2Gas, then carry out the filtration of dust granules, wherein SO2Gas
Removal methods uses wet processing, and said method exists shortcomings:
1, denitrating technique is mainly with ammonia as reducing agent, this medicament device for formulating, uses cold water by adding
After hot device is heated to design temperature, Manual material feeding, to dissolve, plant automation degree is the highest, it is impossible to full
Continuous to-be to medicament during foot big exhaust gas volumn removing nitrogen oxides, causes the waste of manpower and materials；Do not set
Putting flue gas Online Monitoring Control device, pharmaceutical quantities adds at random, it is impossible to monitor in real time, it is impossible to guaranteed is de-
Nitre effect, waste is serious, and operating cost is high；
2, wet desulphurization then uses scrubbing tower form, and can produce containing the inorganic villaumite of high concentration and heavy metal is useless
Water, produces secondary pollution, need to be equipped with Waste Water Treatment, and cost of investment is high, and operating cost is the highest.
Summary of the invention
It is an object of the invention to overcome above-mentioned weak point, thus a kind of sintering device flue gas dry desulfurization urine is provided
Cellulose solution direct-injection denitrification apparatus, the aqueous solution of urea of preparation is sprayed in flue as medicament by this device, medicament
Nitrogen oxides preferentially and in flue gas carries out chemical reduction reaction, and in flue, NOx is reduced to N2And water,
Thus reducing the purpose of discharged nitrous oxides concentration, its automaticity is high, can meet big exhaust gas volumn and take off
Continuous to-be to medicament during denitrification, uses manpower and material resources sparingly；Flue gas Online Monitoring Control device is to cigarette
NOx content in gas detects, and feeds back to PLC control system, and PLC control system controls after calculating
Frequency conversion rotary feeder, entering water electromagnetic valve, regulate carbamide, the dosage of water, it is ensured that the concentration of preparating liquid,
The denitration effect guaranteed, it is to avoid waste, reduces operating cost；Doctor solution consumption is few and utilization rate high,
In cyclic process, sorbent particle is under mutual rubbing action, the most exposed surface that makes new advances, and makes desulphurization reaction not
Breaking and be sufficiently carried out, desulfurization degree is high；In whole sweetening process, operation temperature, higher than dew point, is not corroded
Or condensation, produce without waste water, do not produce secondary pollution；There is denitration, desulfuration efficiency height, investment fortune
Row expense is low, and reliability is high, and energy consumption is low, safeguards easily, the advantages such as floor space is little, system length in service life,
SO2Concentration of emission 200mg/Nm3, the concentration of emission 80mg/Nm of NOx3, dust emission concentration 15mg/Nm3,
The noxious pollutants such as the dioxin in flue gas, heavy metal can be adsorbed, make flue gas qualified discharge, it is to avoid to ring
Border pollutes.
The technical scheme is that a kind of sintering device flue gas dry desulfurization urea liquid direct-injection denitrification apparatus,
Including sintering machine, bellows, flue gas Online Monitoring Control device, electronic air inlet valve, reaction tower, bag-type dust
Device, blower fan, chimney, it is characterised in that: described sintering machine is linked in sequence bellows, flue gas Online Monitoring Control
Device, electronic air inlet valve, reaction tower, sack cleaner, blower fan, chimney, described bellows are online with flue gas
Connecting between monitor controller and have electric flow control valve, described flue gas Online Monitoring Control device connects PLC
Control chamber, PLC control cabinet connects frequency conversion rotary feeder, and frequency conversion rotary feeder is connected above electron helical and claims,
Electron helical claim connect discharger, discharger connect urea granules feed bin, below frequency conversion rotary feeder with penetrate
Stream blender top connects, and one side of jet mixer is by inlet channel and entering water electromagnetic valve, water inlet
Connecting, jet mixer bottom connects dissolves case, dissolves side, box top and is provided with flow of inlet water instrument, feed water flow
Amount instrument is connected with entering water electromagnetic valve, water inlet by inlet channel, dissolves and is provided with blender inside case, stirring
The motor of machine is arranged on dissolving box top, dissolves and is provided with high level meter, low liquidometer and extremely low liquid level inside case
Meter, PLC control cabinet by control cable respectively with entering water electromagnetic valve, flow of inlet water instrument, high level meter, low liquid
Position meter, extremely low liquidometer, water pump, urea liquid delivery pump connect, and dissolve case by urea liquid conveying pipe
Road connects urea liquid delivery pump, and urea liquid delivery pump connects urea liquid by urea liquid conveyance conduit
Entrance, is provided with mist in the urea liquid delivery pump urea liquid conveyance conduit with urea liquid entrance
Changing nozzle, atomizer connects water pump by pipeline, and water pump connects water tank by pipeline, and urea liquid sprays into
Mouth is positioned on the sidewall of sintering device flue gas main pipeline, described flue gas Online Monitoring Control device and electronic air inlet valve
Connecting bypass pipeline between import, by-pass line is connected with fan inlet, and by-pass line is provided with bypass valve,
The outlet of described electronic air inlet valve is connected with reaction tower air intake, and reaction tower air intake bottom connects taper collection ash
Groove, taper ash collection slot connects electric cinder valve, and reaction tower air intake top connects trunnion, and trunnion top is suitable
Sequence connects has calcium hydroxide to dust mouth, water jet, and water jet connects water pump by pipeline, and water pump connects water tank,
Water jet top connects exhanst gas outlet, and exhanst gas outlet connects sack cleaner by entering sack cleaner pipeline,
Entering and be provided with activated carbon entrance on sack cleaner pipeline, activated carbon entrance is by activated carbon playpipe even
Connecing mixture generator, mixture generator one tunnel connects high pressure roots blower fan, and mixture generator is connected above frequency conversion
Rotary feeder, frequency conversion rotary feeder connects electron helical and claims, and electron helical claims to connect discharger, discharging
Device connects activated carbon feed bin, and sack cleaner bottom connects air flume, presses sieve bottom air flume in connecting
Thatch blower fan, air flume side coupled reaction tower circulating line, reaction tower circulating line one tunnel connect circulate into
Material valve, another road connects ash silo electrodynamic valve, and ash silo electrodynamic valve connects ash silo, and the connection of ash silo bottom is electronic unloads ash
Valve, reaction tower calcium hydroxide dusts mouth by calcium hydroxide playpipe connection mixture generator, mixture generator
One tunnel connects high pressure roots blower fan, and mixture generator is connected above frequency conversion rotary feeder, and frequency conversion rotates feed
Machine connects electron helical and claims, and electron helical claims to connect discharger, and discharger connects calcium hydroxide dry powder feed bin.
The invention has the beneficial effects as follows: the aqueous solution of urea of preparation is sprayed in flue as medicament by this device, medicine
Agent nitrogen oxides preferentially and in flue gas carries out chemical reduction reaction, and in flue, NOx is reduced to N2And water,
Thus reducing the purpose of discharged nitrous oxides concentration, its automaticity is high, can meet big exhaust gas volumn and take off
Continuous to-be to medicament during denitrification, uses manpower and material resources sparingly；Flue gas Online Monitoring Control device is to cigarette
NOx content in gas detects, and feeds back to PLC control system, and PLC control system controls after calculating
Frequency conversion rotary feeder, entering water electromagnetic valve, regulate carbamide, the dosage of water, it is ensured that the concentration of preparating liquid,
The denitration effect guaranteed, it is to avoid waste, reduces operating cost；Doctor solution consumption is few and utilization rate high,
In cyclic process, sorbent particle is under mutual rubbing action, the most exposed surface that makes new advances, and makes desulphurization reaction not
Breaking and be sufficiently carried out, desulfurization degree is high；In whole sweetening process, operation temperature, higher than dew point, is not corroded
Or condensation, produce without waste water, do not produce secondary pollution；There is denitration, desulfuration efficiency height, investment fortune
Row expense is low, and reliability is high, and energy consumption is low, safeguards easily, the advantages such as floor space is little, system length in service life,
SO2Concentration of emission 200mg/Nm3, the concentration of emission 80mg/Nm of NOx3, dust emission concentration 15mg/Nm3,
The noxious pollutants such as the dioxin in flue gas, heavy metal can be adsorbed, make flue gas qualified discharge, it is to avoid to ring
Border pollutes.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is part A enlarged drawing in Fig. 1.
Fig. 3 is part B enlarged drawing in Fig. 1.
Fig. 4 is C portion enlarged drawing in Fig. 1.
In Fig. 1, Fig. 2, Fig. 3, Fig. 4,1. sintering machine, 2. electronic air inlet valve, 3. reaction tower air intake,
4. taper ash collection slot, 5. electric cinder valve, 6. trunnion, 7. calcium hydroxide dusts mouth, 8. water jet, 9. water
Pump, 10. water tank, 11. reaction towers, 12. exhanst gas outlets, 13. recycle feed valves, 14. reaction tower circulating lines,
15. ash silo electrodynamic valves, 16. ash silos, 17. electric cinder valves, 18. sack cleaners, 19. air flumes, 20.
Middle pressure roots blower, 21. calcium hydroxide dry powder feed bins, 22. dischargers, 23. electron helicals claim, 24. frequency conversions
Rotary feeder, 25. high pressure roots blower fans, 26. mixture generators, 27. calcium hydroxide playpipes, 28. is other
Logical valve, 29. activated carbon feed bins, 30. dischargers, 31. electron helicals claim, 32. frequency conversion rotary feeders, and 33.
High pressure roots blower fan, 34. mixture generators, 35. activated carbon playpipes, 36. activated carbon entrances, 37. enter
Sack cleaner pipeline, 38. blower fans, 39. chimneys, 40. by-pass lines, 41. urea granules feed bins, 42. unload
Glassware, 43. electron helicals claim, 44. frequency conversion rotary feeders, 45. water inlets, 46. entering water electromagnetic valves, and 47.
Flow of inlet water instrument, 48. blenders, 49. jet mixers, 50. dissolve case, 51. high level meters, 52. low liquid
Position meter, 53. extremely low liquidometers, 54. water tanks, 55. water pumps, 56. urea liquid delivery pumps, 57. urea liquids
Conveyance conduit, 58. atomizers, 59. urea liquid entrances, 60. flue gas Online Monitoring Control devices,
61.PLC control chamber, 62. bellows, 63. electric flow control valves, 64. sintering device flue gas main pipelines.
Detailed description of the invention
The present invention is further illustrated below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, the present invention is that a kind of sintering device flue gas dry desulfurization carbamide is molten
Liquid direct-injection denitrification apparatus, including sintering machine 1, bellows 62, flue gas Online Monitoring Control device 60, electronic enter
Air-valve 2, reaction tower 11, sack cleaner 18, blower fan 38, chimney 39, it is characterised in that: described sintering
Machine 1 be linked in sequence bellows 62, flue gas Online Monitoring Control device 60, electronic air inlet valve 2, reaction tower 11,
Sack cleaner 18, blower fan 38, chimney 39, described bellows 62 and flue gas Online Monitoring Control device 60 it
Between connect have electric flow control valve 63, described flue gas Online Monitoring Control device 60 to connect PLC control cabinet
61, PLC control cabinet 61 connects frequency conversion rotary feeder 44, and frequency conversion rotary feeder 44 is connected above electronics
Spiral claims 43, and electron helical claims 43 connection dischargers 42, and discharger 42 connects urea granules feed bin 41, becomes
Frequently being connected with jet mixer 49 top below rotary feeder 44,49 1 sides of jet mixer are passed through
Inlet channel is connected with entering water electromagnetic valve 46, water inlet 45, and jet mixer 49 bottom connects dissolves case 50,
Dissolving case 50 top side and be provided with flow of inlet water instrument 47, flow of inlet water instrument 47 is by inlet channel and water inlet electricity
Magnet valve 46, water inlet 45 connect, and dissolve case 50 inside and are provided with blender 48, the motor peace of blender 48
It is contained in dissolving case 50 top, dissolves case 50 inside and be provided with high level meter 51, low liquidometer 52 and extremely low liquid level
Meter 53, PLC control cabinet 61 by control cable respectively with entering water electromagnetic valve 46, flow of inlet water instrument 47, high
Liquidometer 51, low liquidometer 52, extremely low liquidometer 53, water pump 55, urea liquid delivery pump 56 connect,
Dissolve case 50 and connect urea liquid delivery pump 56, urea liquid delivery pump by urea liquid conveyance conduit 57
56 connect urea liquid entrance 59 by urea liquid conveyance conduit 57, urea liquid delivery pump 56 with
The urea liquid conveyance conduit 57 of urea liquid entrance 59 is provided with atomizer 58, atomizer 58
Connecting water pump 55 by pipeline, water pump 55 connects water tank 54 by pipeline, and urea liquid entrance 59 is positioned at
On the sidewall of sintering device flue gas main pipeline 64, described flue gas Online Monitoring Control device 60 and electronic air inlet valve 2
Connecting bypass pipeline 40 between import, by-pass line 40 is connected with blower fan 38 import, by-pass line 40 sets
Being equipped with bypass valve 28, the outlet of described electronic air inlet valve 2 is connected with reaction tower air intake 3, reaction tower air intake
3 bottoms connect has taper ash collection slot 4, taper ash collection slot 4 to connect electric cinder valve 5, reaction tower air intake 3
Top connects has trunnion 6, the trunnion 6 top calcium hydroxide that has been linked in sequence to dust mouth 7, water jet 8, water spray
Mouth 8 connects water pump 9 by pipeline, and water pump 9 connects water tank 10, and water jet 8 top connects exhanst gas outlet
12, exhanst gas outlet 12 connects sack cleaner 18 by entering sack cleaner pipeline 37, enters sack cleaner
Being provided with activated carbon entrance 36 on pipeline 37, activated carbon entrance 36 is connected by activated carbon playpipe 35
Mixture generator 34, mixture generator 34 1 tunnel connects high pressure roots blower fan 33, above mixture generator 34
Connecting frequency conversion rotary feeder 32, frequency conversion rotary feeder 32 connects electron helical and claims 31, and electron helical claims
31 connect discharger 30, and discharger 30 connects activated carbon feed bin 29, and sack cleaner 18 bottom connects air
Skewed slot 19, presses roots blower 20, air flume 19 side coupled reaction tower bottom air flume 19 in connecting
Circulating line 14, reaction tower circulating line 14 1 tunnel connects recycle feed valve 13, and another road connects ash silo electricity
Dynamic valve 15, ash silo electrodynamic valve 15 connects ash silo 16, and ash silo 16 bottom connects electric cinder valve 17, reaction tower
Dust mouth 7 of calcium hydroxide connects mixture generator 26, mixture generator 26 by calcium hydroxide playpipe 27
One tunnel connects high pressure roots blower fan 25, and mixture generator 26 is connected above frequency conversion rotary feeder 24, frequency conversion
Rotary feeder 24 connects electron helical and claims 23, and electron helical claims 23 connection dischargers 22, discharger 22
Connect calcium hydroxide dry powder feed bin 21.
The work process of the present invention: 180m2Sintering machine 1, exhaust gas volumn 300000Nm3/ h, SO2Concentration
3000mg/Nm3, NOx concentration 400mg/Nm3, dust concentration 30g/Nm3, flue-gas temperature 100～150 DEG C；
Sintering machine 1 flue gas enters in bellows 62 by the suction function of blower fan 38, is connecting each bellows 62
On sintering device flue gas main pipeline 64, it is provided with electric flow control valve 63, is used for mating each bellows 62 air quantity,
Subsequently into sintering device flue gas main pipeline 64, it is uniform that the urea liquid after atomization sends into urea liquid entrance 59
Enter in sintering device flue gas main pipeline 64, the nitrogen in sintering device flue gas main pipeline 64, in carbamide and flue gas
Oxide generation chemical reaction, in sintering device flue gas main pipeline 64, NOx is reduced to N2And water；Through de-
Sintering machine 1 flue gas that nitre processes is entered desulfurizing tower 11 by the effect of blower fan 38, after flue gas enters desulfurizing tower 11
Being accelerated at trunnion 6, high velocity air forms strong turbulent flow in desulfurizing tower 11, produces the most fully
Gas-solid contact；The flue gas containing high concentrate dust processed through desulfurization goes out from desulfurizing tower 11 top flue gas
Mouthfuls 12 out after, carry out udst separation in entering the sack cleaner 18 at rear portion, through the flue gas stream purified
Go out sack cleaner 18, enter the outer row of chimney 39 by blower fan 38 and clean flue；
Claimed 43 by urea granules feed bin 41, discharger 42, electron helical, the group such as frequency conversion rotary feeder 44
The urea granules conveyer device become；Flue gas Online Monitoring Control device 60 is to the exhaust gas volumn of incinerator 1 and generation
The amount of NOx detects, and feeds back to PLC control system, and PLC control system calculates the consumption of carbamide,
After electron helical claims 43 Weighings, by frequency conversion rotary feeder 44, according to operating mode, with changing rotating speed
Mode adjust conveying capacity, after urea granules exports from frequency conversion rotary feeder 44, through jet mixer
49 mix in dissolving case 50；During operation, the current of the nozzle ejection on jet mixer 49 top define
One layer of moisture film rotated, urea granules falls moisture film from upper end, and along with moisture film rotates, in this mistake
In journey, urea granules is wetted；
Three liquidometers, respectively high level meter 51, low liquidometer 52 and extremely low liquid are had in case 50 dissolving
Position meter 53, normal operating conditions, between high and low liquid level, automatically turns on into water electromagnetism to system during low liquid level
Valve 46, opens frequency conversion rotary feeder 44 and stirring motor 48, frequency conversion rotary feeder 44, water inlet simultaneously
The operation time of electromagnetic valve 46 is automatically controlled according to preparation concentration by PLC program, and this method of operation can be very
The good concentration ensureing preparating liquid；
Preparation concentration requires to set according to user by the touch screen controller on PLC control cabinet 61 panel
Fixed, so that molten medicine process can be carried out online, and ensure that the precision of solution concentration；
When there are abnormal conditions, system will be automatically stopped operation and send alarm signal.When extremely low liquid level is moved
When making, system is by automatic alarm, and this design is to protect urea liquid delivery pump in the case of cutting off the water supply
56, prevent urea liquid delivery pump 56 dry tap；
The flow of inlet water instrument 47 of configuration in water inlet system, exports in real time the signal of flow of inlet water, PLC according to
The change of flow of inlet water adjusts urea granules amount at any time, it is ensured that the concentration of urea liquid prepared by system be 35%～
40%, additionally system is being cut off the water supply or in the case of low discharge, frequency conversion rotary feeder 44 will be automatically stopped operation,
Avoid wasting urea granules, reduce operating cost and be easy to automated management；
Being configured to urea liquid that concentration is 35%～40%, to enter urea liquid by urea liquid delivery pump 56 defeated
Send pipeline 57, in urea liquid conveyance conduit 57, spray into atomized water by atomizer 58, make carbamide molten
The concentration dilution of liquid is 3%～5%, and the urea liquid after atomization sends into urea liquid entrance 59 even into burning
In knot machine flue gas main pipeline 64, the nitrogen oxides in sintering device flue gas main pipeline 64, in carbamide and flue gas
Generation chemical reaction:
2CO(NH2)2+4NO+O2=4N2+4H2O+2CO2
4CO(NH2)2+4NO2=6N2+gH2O+2CO2
In sintering device flue gas main pipeline 64, NOx is reduced to N2And water；
The flue gas of sintering machine 1, after denitration processes, enters reaction tower 11, cigarette by the suction function of blower fan 38
Gas is accelerated after entering reaction tower 11 at trunnion 6, and high velocity air is formed strong in reaction tower 11
Turbulent flow, produces efficient sufficient gas-solid contact；Through reaction tower 11 through desulfurization process containing high concentration powder
The flue gas of dirt from reaction tower 11 top exhanst gas outlet 12 out after, enter rear portion sack cleaner 18 in enter
Row udst separation, flows out sack cleaner 18 through the flue gas purified, and enters cigarette by blower fan 38 and clean flue
The outer row of chimney 39；When the flue-gas temperature entering sack cleaner 18 exceedes the operating temperature of cloth bag, open side
Logical valve 28, cuts out electronic air inlet valve 2, makes flue gas pass through by-pass line 40 and enter blower fan 38, pass through chimney
39 discharge, and protect cloth bag；
Claimed 23 by calcium hydroxide dry powder feed bin 21, discharger 22, electron helical, frequency conversion rotary feeder 24,
The calcium hydroxide injection of the composition such as high pressure roots blower fan 25, mixture generator 26, calcium hydroxide playpipe 27
Device；Exhaust gas volumn according to sintering machine 1 and the amount of generation sulfide, calculate Ca (OH)2Consumption, through electricity
After sub-spiral claims 23 Weighings, by frequency conversion rotary feeder 24, according to operating mode, with the side changing rotating speed
Formula adjusts powder delivering amount, and powder delivering amount sends into blender 26, from the wind-force of high pressure roots blower fan 25, will fall into mixed
The powder of clutch 26 is sent into the calcium hydroxide mouth 7 that dusts by calcium hydroxide playpipe 27 and is entered in reaction tower 11,
In reaction tower 11, spread in the calcium hydroxide particle in flue gas under mutual rubbing action, constantly hydrogen-oxygen
Change (sub-) sulfur sulfur calcium removal that calcium particle surface generates, make that the calcium hydroxide within granule is the most exposed to make new advances
Surface, makes desulphurization reaction constantly be sufficiently carried out down, the SO in flue gas2Removal efficiency high, due to SO3、
The sulfur gases such as HF, HCL compare SO2It is more easy to react with calcium hydroxide, SO in reaction tower 113、
The removal efficiency of HF, HCL can reach more than 98%；In reaction tower 11, reacted calcium hydroxide leads to
Cross air flume 19, reaction tower circulating line 14 carries out calcium hydroxide iterative cycles with reaction tower 11, and it follows
Circular rector is controlled by recycle feed valve 13, is provided with middle pressure roots blower 20, by air bottom air flume 19
Calcium hydroxide in skewed slot 19 is in suspended state all the time, it is ensured that the elimination reaction occurred, and works as desulfurization operation
After a period of time, open ash silo electrodynamic valve 15, the dust in desulfurization product, flue gas is entered ash silo 16, logical
Crossing electric cinder valve 17 and discharge blood circulation, calcium hydroxide induction system is by calcium hydroxide iterative cycles and flue gas
Contact, circulating ratio reaches 100～200 times, and calcium hydroxide utilization rate is high；
A series of chemical change is there is in above-mentioned technical process:
Ca(OH)2+SO2+1/2H2O→CaSO3.1/2H2O+H2O
Ca(OH)2+SO3+H2O→CaSO4.2H2O
Ca(OH)2+2HCL→CaCL2.2H2O
Ca(OH)2+2HF→CaF2.2H2O
CaSO3.1/2H2O+1/2O2+2/3H2O→CaSO4.2H2O
Ca(OH)2+CO2→CaCO3+H2O
In reaction tower 11, mixture is dry relatively uniform, and recycle hydrogen calcium oxide has fabulous mobility, energy
Guarantee stablizing of operating mode in reaction tower 11；Sweetening process becomes the thicker granule work at gravity because of conglomeration
With falling in reaction tower taper ash collection slot 4, reacted tower bottom electric cinder valve 5 is discharged；
Secondary desulfuration reaction on cloth bag: under the effect of negative pressure, Ca (OH)2Powder adsorption is formed on cloth bag surface
One layer of Ca (OH)2Bisque, reacts further with the sulfur-containing smoke gas entering cleaner unit.In course of reaction, use
Cleaner unit import and export pressure differential controls deashing frequency, when pressure differential exceedes the upper limit of setting, to cloth bag
Carry out deashing, in order to Ca (OH)2Powder constantly adsorbs and reacts with sulfur-containing smoke gas on cloth bag surface.Ca(OH)2
Iterative cycles and smoke contacts, Ca (OH)2Utilization rate is high, improves desulfuration efficiency；
Claimed 31 by activated carbon feed bin 29, discharger 30, electron helical, frequency conversion rotary feeder 32, high pressure
The injection apparatus of the composition activated carbon such as roots blower 33, mixture generator 34, activated carbon playpipe 35；Root
Exhaust gas volumn and the amount of the generation harmful substance such as dioxin, heavy metal, disappearing of calculated activity charcoal according to sintering machine 1
Consumption, after electron helical claims 31 Weighings, by frequency conversion rotary feeder 32, according to operating mode, with changing
The mode of variable speed adjusts activated carbon conveying capacity, and activated carbon sends into blender 34, from high pressure roots blower fan 33
Wind-force, send into activated carbon entrance 36 by falling into the activated carbon of blender 34 by activated carbon playpipe 35
Entering in sack cleaner pipeline 37, the activated carbon sprayed into is harmful to the dioxin in flue gas and heavy metal etc.
Material adsorbs；
Water for industrial use in water tank 10 pumps in the water jet 8 of reaction tower 11 by water pump 9, water with
Vaporific ejection, improves Ca (OH)2With SO2、SO3, the heat transfer of the sour gas such as HF, HCL, mass transfer speed
Rate, occurs to neutralize reaction, removes the sour gas in flue gas, improve desulfuration efficiency；
As can be seen here, the aqueous solution of urea of preparation is sprayed in flue as medicament by apparatus of the present invention, and medicament is preferential
Carrying out chemical reduction reaction with the nitrogen oxides in flue gas, in flue, NOx is reduced to N2And water, thus
Reducing the purpose of discharged nitrous oxides concentration, its automaticity is high, can meet big exhaust gas volumn removing nitrogen
Continuous to-be to medicament during oxide, uses manpower and material resources sparingly；Flue gas Online Monitoring Control device is in flue gas
NOx content detect, and feed back to PLC control system, PLC control system controls frequency conversion after calculating
Rotary feeder, entering water electromagnetic valve, regulate carbamide, the dosage of water, it is ensured that the concentration of preparating liquid, really
The denitration effect protected, it is to avoid waste, reduces operating cost；Doctor solution consumption is few and utilization rate high, follows
During ring, sorbent particle is under mutual rubbing action, the most exposed surface that makes new advances, and makes desulphurization reaction continuous
Being sufficiently carried out, desulfurization degree is high；In whole sweetening process, operation temperature higher than dew point, not corrosion or
Condensation, produces without waste water, does not produce secondary pollution；Having denitration, desulfuration efficiency height, investment runs
Expense is low, and reliability is high, and energy consumption is low, safeguards easily, the advantages such as floor space is little, system length in service life,
SO2Concentration of emission 200mg/Nm3, the concentration of emission 80mg/Nm of NOx3, dust emission concentration 15mg/Nm3,
The noxious pollutants such as the dioxin in flue gas, heavy metal can be adsorbed, make flue gas qualified discharge, it is to avoid to ring
Border pollutes.
Claims (1)
1. a sintering device flue gas dry desulfurization urea liquid direct-injection denitrification apparatus, including sintering machine, bellows,
Flue gas Online Monitoring Control device, electronic air inlet valve, reaction tower, sack cleaner, blower fan, chimney, its
Be characterised by: described sintering machine be linked in sequence bellows, flue gas Online Monitoring Control device, electronic air inlet valve,
Reaction tower, sack cleaner, blower fan, chimney, connect between described bellows and flue gas Online Monitoring Control device
Being connected to electric flow control valve, described flue gas Online Monitoring Control device connects PLC control cabinet, PLC control cabinet
Connecting frequency conversion rotary feeder, frequency conversion rotary feeder is connected above electron helical and claims, and electron helical claims to connect
Discharger, discharger connects urea granules feed bin, below frequency conversion rotary feeder with jet mixer top even
Connecing, one side of jet mixer is connected with entering water electromagnetic valve, water inlet by inlet channel, jet mixing
Device bottom connects dissolves case, dissolves side, box top and is provided with flow of inlet water instrument, and flow of inlet water instrument passes through water inlet pipe
Road is connected with entering water electromagnetic valve, water inlet, dissolves and is provided with blender inside case, and the motor of blender is arranged on
Dissolving box top, dissolve and be provided with high level meter, low liquidometer and extremely low liquidometer inside case, PLC control cabinet is led to
Cross control cable respectively with entering water electromagnetic valve, flow of inlet water instrument, high level meter, low liquidometer, extremely low liquid level
Meter, water pump, urea liquid delivery pump connect, and dissolve case and connect urea liquid by urea liquid conveyance conduit
Delivery pump, urea liquid delivery pump connects urea liquid entrance by urea liquid conveyance conduit, at carbamide
Solution transfer pump and the urea liquid conveyance conduit of urea liquid entrance are provided with atomizer, atomization spray
Mouth connects water pump by pipeline, and water pump connects water tank by pipeline, and urea liquid entrance is positioned at sintering machine cigarette
On the sidewall of gas main pipeline, it is connected other between described flue gas Online Monitoring Control device and electronic air inlet valve import
Threading a pipe, by-pass line is connected with fan inlet, and by-pass line is provided with bypass valve, described electronic air intake
Valve outlet port is connected with reaction tower air intake, and reaction tower air intake bottom connects taper ash collection slot, taper collection ash
Groove connects electric cinder valve, and reaction tower air intake top connects has trunnion, trunnion top to be linked in sequence hydrogen-oxygen
Changing calcium to dust mouth, water jet, water jet connects water pump by pipeline, and water pump connects water tank, water jet top
Connecting and have exhanst gas outlet, exhanst gas outlet connects sack cleaner by entering sack cleaner pipeline, enters cloth bag and removes
Being provided with activated carbon entrance on dirt device pipeline, activated carbon entrance connects mixing by activated carbon playpipe and sends out
Raw device, mixture generator one tunnel connects high pressure roots blower fan, and mixture generator is connected above frequency conversion and rotates feed
Machine, frequency conversion rotary feeder connects electron helical and claims, and electron helical claims to connect discharger, and discharger connects lives
Property charcoal feed bin, sack cleaner bottom connect air flume, bottom air flume connect in press roots blower,
Air flume side coupled reaction tower circulating line, reaction tower circulating line one tunnel connects recycle feed valve, separately
One tunnel connects ash silo electrodynamic valve, and ash silo electrodynamic valve connects ash silo, and ash silo bottom connects electric cinder valve, reaction
Tower calcium hydroxide dusts mouth by calcium hydroxide playpipe connection mixture generator, the connection of mixture generator one tunnel
High pressure roots blower fan, mixture generator is connected above frequency conversion rotary feeder, and frequency conversion rotary feeder connects electricity
Sub-spiral claims, and electron helical claims to connect discharger, and discharger connects calcium hydroxide dry powder feed bin.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510173609.3A CN106139846A (en) | 2015-04-08 | 2015-04-08 | A kind of sintering device flue gas dry desulfurization urea liquid direct-injection denitrification apparatus |
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|---|---|---|---|
| CN201510173609.3A CN106139846A (en) | 2015-04-08 | 2015-04-08 | A kind of sintering device flue gas dry desulfurization urea liquid direct-injection denitrification apparatus |
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| CN106139846A true CN106139846A (en) | 2016-11-23 |
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|---|---|---|---|
| CN201510173609.3A Pending CN106139846A (en) | 2015-04-08 | 2015-04-08 | A kind of sintering device flue gas dry desulfurization urea liquid direct-injection denitrification apparatus |
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| CN106969641A (en) * | 2017-05-24 | 2017-07-21 | 秦皇岛合达能源科技开发有限公司 | One kind sintering flue gas decomposes bioxin desulphurization denitration recovery waste heat system and method from combustion-supporting |
| CN107036452A (en) * | 2017-05-24 | 2017-08-11 | 秦皇岛合达能源科技开发有限公司 | It is a kind of to be used to sinter the combustion-supporting fluidized-bed reactor of fume high-temperature and its method |
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| CN106969641A (en) * | 2017-05-24 | 2017-07-21 | 秦皇岛合达能源科技开发有限公司 | One kind sintering flue gas decomposes bioxin desulphurization denitration recovery waste heat system and method from combustion-supporting |
| CN107036452A (en) * | 2017-05-24 | 2017-08-11 | 秦皇岛合达能源科技开发有限公司 | It is a kind of to be used to sinter the combustion-supporting fluidized-bed reactor of fume high-temperature and its method |
| CN108404599A (en) * | 2018-02-12 | 2018-08-17 | 安溪县石草池茶叶有限公司 | A kind of organic waste gas treatment device and its method for incinerator |
| CN108404599B (en) * | 2018-02-12 | 2021-02-05 | 泉州台商投资区双艺商贸有限公司 | Organic waste gas treatment device and method for incinerator |
| CN109876598A (en) * | 2019-03-22 | 2019-06-14 | 江苏东本环保工程有限公司 | The technique that active carbon conveys spraying system and its purifying smoke |
| CN112403185A (en) * | 2020-05-11 | 2021-02-26 | 中冶长天国际工程有限责任公司 | Method for recovering ferrous ammonium sulfite by using sintering flue gas |
| CN112403184A (en) * | 2020-05-11 | 2021-02-26 | 中冶长天国际工程有限责任公司 | Method for recovering various sulfur resources by using sintering flue gas |
| CN112403184B (en) * | 2020-05-11 | 2022-05-03 | 中冶长天国际工程有限责任公司 | Method for recovering various sulfur resources by using sintering flue gas |
| CN112403185B (en) * | 2020-05-11 | 2022-05-03 | 中冶长天国际工程有限责任公司 | Method for recovering ferrous ammonium sulfite by using sintering flue gas |
| CN114588765A (en) * | 2022-01-19 | 2022-06-07 | 上海隆麦机械设备工程有限公司 | SNCR denitrification facility with energy-conserving function |
| CN114588765B (en) * | 2022-01-19 | 2024-02-06 | 上海隆麦机械设备工程有限公司 | SNCR denitrification facility with energy-conserving function |
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