CN105889961A - In-furnace denitration and dry deacidification device for flue gas of incinerator - Google Patents
In-furnace denitration and dry deacidification device for flue gas of incinerator Download PDFInfo
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- CN105889961A CN105889961A CN201410826168.8A CN201410826168A CN105889961A CN 105889961 A CN105889961 A CN 105889961A CN 201410826168 A CN201410826168 A CN 201410826168A CN 105889961 A CN105889961 A CN 105889961A
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Abstract
An in-furnace denitration and dry deacidification device for flue gas of an incinerator comprises the incinerator, an online flue gas monitoring device, an electric air inlet valve, a reaction tower, a bag-type dust collector, a main fan and a chimney and is characterized in that the incinerator is sequentially connected with the online flue gas monitoring device, the electric air inlet valve, the reaction tower, the bag-type dust collector, the main fan and the chimney; the online flue gas monitoring device is connected with a programmable logic controller(PLC) control box; the PLC control box is connected with a variable-frequency rotary feeder; an electronic screw scale is connected on the upper side of the variable-frequency rotary feeder and is connected with an unloader; the unloader is connected with a urea particle material bin; the lower side of the variable-frequency rotary feeder is connected with the upper part of a jet mixer; one side surface of the jet mixer is connected with a water inlet solenoid valve and a water inlet through a water inlet pipe. The device can remove acid gases and nitric oxides in flue gas produced by the household garbage incinerator and can adsorb hazardous pollutants such as dioxin, heavy metals and the like in the flue gas, so that the flue gas can be discharged with the standard level, and environmental pollution is avoided.
Description
Technical field
The present invention relates to a kind of incinerator smoke denitration in the stove dry-process deacidification device, be particularly used for purifying
The flue gas that domestic waste incineration produces, belongs to environmental technology field.
Background technology
In prior art, house refuse is after fully burning between produced 850 DEG C～1100 DEG C
Flue gas, denitrating technique is mainly with ammonia (or urea liquid) as reducing agent, uses Manual material feeding, device
Automaticity is the highest；Then carry out removing sour gas, then carry out the filtration of dust granules, wherein acid
The removal methods of gas uses semidry method or wet processing, and said method exists shortcomings:
1, denitrating technique is mainly with ammonia (or urea liquid) as reducing agent, this medicament device for formulating,
After using cold water to be heated to design temperature by heater, Manual material feeding, dissolves, plant automation journey
Spend the highest, it is impossible to continuous to-be to medicament when meeting big exhaust gas volumn removing nitrogen oxides, cause manpower and materials
Waste；Being not provided with flue gas on-Line Monitor Device, pharmaceutical quantities adds at random, it is impossible to monitor in real time, it is impossible to
The denitration effect guaranteed, waste is serious, and operating cost is high；
2, semidry method deacidification is to be sprayed in reactor by nozzle or rotary sprayer by lime white, forms particle diameter relatively
Little drop, makes sour gas and lime white react generation salt, and its shortcoming is that the preparation of lime white is complicated,
Deacidification limited efficacy.
3, wet method deacidification 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 provide a kind of incinerator smoke denitration in the stove to do
Method deacidifying device, the aqueous solution of urea of preparation is sprayed in burner hearth as medicament by this device, at 850 DEG C～1100
In DEG C temperature range, medicament is preferential and nitrogen oxides in flue gas carries out chemical reduction reaction, NOx in burner hearth
It is reduced to N2And water, thus reduce the purpose of discharged nitrous oxides concentration, its automaticity is high,
Continuous to-be to medicament when can meet big exhaust gas volumn removing nitrogen oxides, uses manpower and material resources sparingly；Flue gas is online
NOx content in flue gas is detected by monitoring device, and feeds back to PLC control system, and PLC controls system
Statistics controls frequency conversion rotary feeder, entering water electromagnetic valve after calculating, and regulates carbamide, the dosage of water, it is ensured that join
The concentration of pharmacy liquid, it is ensured that good denitration effect, it is to avoid waste, reduces operating cost；Deacidification agent consumption is few
And utilization rate is high, in cyclic process, deacidification agent granule is under mutual rubbing action, the most exposed surface that makes new advances,
Making deacidification reaction constantly be sufficiently carried out, acid removal rate is up to 90%；In whole deacidification, operation temperature is high
In dew point, not corrosion or condensation, produce without waste water, do not produce secondary pollution；There is deacidification efficiency
Height, investment operating cost is low, and reliability is high, and energy consumption is low, safeguards that easily floor space is little, and system uses the longevity
The advantages such as life is long, SO2Concentration of emission 70mg/Nm3, the concentration of emission 40mg/Nm of HCL3, dust emission
Concentration 15mg/Nm3, it is better than GB18485-2014 standard " consumer waste incineration Environmental capacity standard "
(SO2＜ 80mg/Nm3, HCL ＜ 50mg/Nm3, dust emission concentration ＜ 20mg/Nm3), it is possible to absorption flue gas
In dioxin, the noxious pollutant such as heavy metal, make flue gas qualified discharge, it is to avoid to environment.
The technical scheme is that a kind of incinerator smoke denitration in the stove dry-process deacidification device, including burning
Stove, flue gas on-Line Monitor Device, electronic air inlet valve, reaction tower, sack cleaner, main air blower, chimney,
It is characterized in that: described incinerator be linked in sequence flue gas on-Line Monitor Device, electronic air inlet valve, reaction tower,
Sack cleaner, main air blower, chimney, described flue gas on-Line Monitor Device connects PLC control cabinet, and PLC controls
Case connects frequency conversion rotary feeder, and frequency conversion rotary feeder is connected above electron helical and claims, and electron helical claims even
Unloading glassware, discharger connects urea granules feed bin, with jet mixer top below frequency conversion rotary feeder
Connecting, one side of jet mixer is connected with entering water electromagnetic valve, water inlet by inlet channel, and jet mixes
Clutch bottom connects dissolves case, dissolves side, box top and is provided with flow of inlet water instrument, and flow of inlet water instrument is by water inlet
Pipeline is connected with entering water electromagnetic valve, water inlet, dissolves and is provided with blender inside case, and the motor of blender is installed
Dissolving box top, dissolving and be provided with high level meter, low liquidometer and extremely low liquidometer, PLC control cabinet inside case
By control cable respectively with entering water electromagnetic valve, flow of inlet water instrument, high level meter, low liquidometer, extremely low liquid
Position meter, water pump, urea liquid delivery pump connect, and dissolve case molten by urea liquid conveyance conduit connection carbamide
Liquid delivery pump, urea liquid delivery pump connects urea liquid entrance by urea liquid conveyance conduit, at urine
Cellulose solution delivery pump is provided with atomizer in the urea liquid conveyance conduit of urea liquid entrance, atomization
Nozzle connects water pump by pipeline, and water pump connects water tank by pipeline, and urea liquid entrance is positioned at incinerator
Above the sidewall of burner hearth, connecting bypass between described flue gas Online Monitoring Control device and electronic air inlet valve import
Pipeline, by-pass line is connected with main air blower import, 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.
The invention has the beneficial effects as follows: the aqueous solution of urea of preparation is sprayed in burner hearth as medicament by this device,
In 850 DEG C～1100 DEG C of temperature ranges, medicament is preferential and nitrogen oxides in flue gas carries out chemical reduction reaction,
In burner hearth, NOx is reduced to N2And water, thus reducing the purpose of discharged nitrous oxides concentration, it is certainly
Dynamicization degree is high, continuous to-be to medicament when can meet big exhaust gas volumn removing nitrogen oxides, saves manpower thing
Power；NOx content in flue gas is detected by flue gas on-Line Monitor Device, and feeds back to PLC control system,
PLC control system controls frequency conversion rotary feeder, entering water electromagnetic valve, regulation carbamide, the adding of water after calculating
Amount, it is ensured that the concentration of preparating liquid, it is ensured that good denitration effect, it is to avoid waste, reduces operating cost；De-
Acid agent consumption is few and utilization rate high, and in cyclic process, deacidification agent granule is under mutual rubbing action, the most naked
Exposing new surface, make deacidification reaction constantly be sufficiently carried out, acid removal rate is up to 90%；In whole deacidification,
Operation temperature, higher than dew point, is not corroded or condensation, is produced without waste water, do not produce secondary pollution；Tool
Having deacidification efficiency high, investment operating cost is low, and reliability is high, and energy consumption is low, safeguards that easily floor space is little,
The advantages such as system length in service life, SO2Concentration of emission 70mg/Nm3, the concentration of emission 40mg/Nm of HCL3,
Dust emission concentration 15mg/Nm3, it is better than GB18485-2014 standard " consumer waste incineration Environmental capacity mark
Accurate " (SO2＜ 80mg/Nm3, HCL ＜ 50mg/Nm3, dust emission concentration ＜ 20mg/Nm3), it is possible to absorption cigarette
The noxious pollutants such as dioxin in gas, heavy metal, make flue gas qualified discharge, it is to avoid to environment.
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. incinerator, 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. main air blowers, 39. chimneys, 40. by-pass lines, 41. urea granules feed bins, 42.
Discharger, 43. electron helicals claim, 44. frequency conversion rotary feeders, 45. water inlets, 46. entering water electromagnetic valves,
47. flow of inlet water instrument, 48. blenders, 49. jet mixers, 50. dissolving casees, 51. high level meters, 52.
Low liquidometer, 53. extremely low liquidometers, 54. water tanks, 55. water pumps, 56. urea liquid delivery pumps, 57. carbamide
Solution delivery line, 58. atomizers, 59. urea liquid entrances, 60. flue gas on-Line Monitor Device,
61.PLC control chamber.
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 incinerator smoke denitration in the stove dry method takes off
Acid device, including incinerator 1, flue gas on-Line Monitor Device 60, electronic air inlet valve 2, reaction tower 11, cloth
Bag dust collector 18, main air blower 38, chimney 39, it is characterised in that: described incinerator 1 flue gas that is linked in sequence exists
Line monitoring device 60, electronic air inlet valve 2, reaction tower 11, sack cleaner 18, main air blower 38, chimney
39, described flue gas on-Line Monitor Device 60 connects PLC control cabinet 61, and PLC control cabinet 61 connects frequency conversion rotation
Turning batcher 44, frequency conversion rotary feeder 44 is connected above electron helical and claims 43, and electron helical claims 43 connections
Discharger 42, discharger 42 connects urea granules feed bin 41, mixes with jet below frequency conversion rotary feeder 44
Clutch 49 top connects, 49 1 sides of jet mixer by inlet channel and entering water electromagnetic valve 46, enter
The mouth of a river 45 connects, and jet mixer 49 bottom connects dissolves case 50, dissolves case 50 top side and is provided with into water
Flow instrument 47, flow of inlet water instrument 47 is connected with entering water electromagnetic valve 46, water inlet 45 by inlet channel, molten
Solving case 50 inside and be provided with blender 48, the motor of blender 48 is arranged on dissolving case 50 top, dissolves case
50 internal high level meter 51, low liquidometer 52 and the extremely low liquidometers 53 of being provided with, PLC control cabinet 61 is by control
Cable processed respectively with entering water electromagnetic valve 46, flow of inlet water instrument 47, high level meter 51, low liquidometer 52, pole
Low liquidometer 53, water pump 55, urea liquid delivery pump 56 connect, and dissolve case 50 and are carried by urea liquid
Pipeline 57 connects urea liquid delivery pump 56, and urea liquid delivery pump 56 is by urea liquid conveyance conduit 57
Connect urea liquid entrance 59, molten with the carbamide of urea liquid entrance 59 at urea liquid delivery pump 56
Being provided with atomizer 58 in liquid conveyance conduit 57, atomizer 58 connects water pump 55, water pump by pipeline
55 connect water tank 54 by pipeline, and urea liquid entrance 59 is positioned at above the sidewall of incinerator 1 burner hearth,
Connecting bypass pipeline 40 between described flue gas on-Line Monitor Device 60 and electronic air inlet valve 2 import, by-pass line
40 are connected with main air blower 38 import, and by-pass line 40 is provided with bypass valve 28, described electronic air inlet valve 2
Outlet is connected with reaction tower air intake 3, and reaction tower air intake 3 bottom connects taper ash collection slot 4, taper collection
Ash-pit 4 connects electric cinder valve 5, and reaction tower air intake 3 top connects trunnion 6, trunnion 6 top order
Connecting and have calcium hydroxide to dust mouth 7, water jet 8, water jet 8 connects water pump 9 by pipeline, and water pump 9 is even
Water receiving case 10, water jet 8 top connects exhanst gas outlet 12, and exhanst gas outlet 12 is by entering sack cleaner
Pipeline 37 connects sack cleaner 18, enters and is provided with activated carbon entrance 36 on sack cleaner pipeline 37,
Activated carbon entrance 36 connects mixture generator 34, mixture generator 34 1 tunnel by activated carbon playpipe 35
Connecting high pressure roots blower fan 33, mixture generator 34 is connected above frequency conversion rotary feeder 32, and frequency conversion rotates
Batcher 32 connects electron helical and claims 31, and electron helical claims 31 connection dischargers 30, and discharger 30 connects
Activated carbon feed bin 29, sack cleaner 18 bottom connects air flume 19, in connecting bottom air flume 19
Pressure roots blower 20, air flume 19 side coupled reaction tower circulating line 14, reaction tower circulating line 14
One tunnel connects recycle feed valve 13, and another road connects ash silo electrodynamic valve 15, and ash silo electrodynamic valve 15 connects ash silo
16, ash silo 16 bottom connects electric cinder valve 17, and the reaction tower calcium hydroxide mouth 7 that dusts is sprayed by calcium hydroxide
Penetrating pipe 27 and connect mixture generator 26, mixture generator 26 1 tunnel connects high pressure roots blower fan 25, and mixing is sent out
Raw device 26 is connected above frequency conversion rotary feeder 24, and frequency conversion rotary feeder 24 connects electron helical and claims 23,
Electron helical claims 23 connection dischargers 22, and discharger 22 connects calcium hydroxide dry powder feed bin 21.
The work process of the present invention: 500t/d domestic waste incineration 1, exhaust gas volumn 14～15 × 104m3/ h,
Temperature in incinerator 1 burner hearth is 850 DEG C～1100 DEG C, SO2Concentration 300～800mg/Nm3, HCL's
Concentration 800～1200mg/Nm3, the concentration 400～500mg/Nm of NOx3, dust concentration 20～30g/Nm3,
The oxygen content 8%～12% of flue gas, the water capacity 15%～25% of flue gas；
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 on-Line Monitor Device 60 is to the exhaust gas volumn of incinerator 1 and generates NOx
Amount detect, and feed back to PLC control system, PLC control system calculates the consumption of carbamide, warp
After electron helical claims 43 Weighings, by frequency conversion rotary feeder 44, according to operating mode, with changing rotating speed
Mode adjusts 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
The moisture film that layer rotates, urea granules falls moisture film from upper end, and along with moisture film rotates, in this process
Middle 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
Burn in stove 1 burner hearth, in incinerator 1 burner hearth, the nitrogen oxides generation chemical reaction in carbamide and flue gas:
2CO(NH2)2+4NO+O2=4N2+4H2O+2CO2
4CO(NH2)2+4NO2=6N2+8H2O+2CO2
In burner hearth, NOx is reduced to N2And water；
The flue gas of domestic waste incineration 1, after denitration processes, enters anti-by the suction function of main air blower 38
Answering tower 11, flue gas is accelerated after entering reaction tower 11 at trunnion 6, and high velocity air is in reaction tower 11
Form strong turbulent flow, produce efficient sufficient gas-solid contact；Through reaction tower 11 through containing that deacidification processes
Have the flue gas of high concentrate dust from reaction tower mouth top exhanst gas outlet 12 out after, the cloth bag entering rear portion removes
Carry out udst separation in dirt device 18, flow out sack cleaner 18, by main air blower 38 through the flue gas purified
The outer row of chimney 39 is entered with clean flue；When the flue-gas temperature entering sack cleaner 18 exceedes the work of cloth bag
During temperature, open bypass valve 28, close electronic air inlet valve 2, make flue gas pass through by-pass line 40 and enter main air
Machine 38, is discharged by chimney 39, protects 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 incinerator 1 and the amount of generation acidulants, 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-) calcium sulfate removal that calcium particle surface generates, make that the calcium hydroxide within granule is the most exposed to make new advances
Surface, makes deacidification reaction constantly be sufficiently carried out down, the SO in flue gas2Removal efficiency can reach 90%,
Due to SO3, the sour gas such as HF, HCL compare SO2It is more easy to react with calcium hydroxide, reaction tower 11
Interior SO3, the removal efficiency of HF, HCL can reach more than 98%；In reaction tower 11 reacted
Calcium hydroxide carries out calcium hydroxide repeatedly by air flume 19, reaction tower circulating line 14 with reaction tower 11
Circulation, its circulating load is controlled by recycle feed valve 13, is provided with middle pressure roots blower bottom air flume 19
20, the calcium hydroxide in air flume 19 is in suspended state all the time, it is ensured that the elimination reaction occurred,
After deacidification runs a period of time, open ash silo electrodynamic valve 15, the dust in deacidified product, flue gas is entered
Ash silo 16, discharges blood circulation by electric cinder valve 17, and calcium hydroxide induction system is by calcium hydroxide repeatedly
Circulation and smoke contacts, 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(CH)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；Deacidification 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 deacidification 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 gas containing acid fume 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 on cloth bag surface and containing acid fume solid/liquid/gas reactions.Ca(OH)2
Iterative cycles and smoke contacts, Ca (OH)2Utilization rate is high, improves deacidification efficiency；
Claimed 31 by activated carbon feed bin 29, discharger 30, electron helical, frequency conversion rotary feeder 32, high pressure sieve
The injection apparatus of the composition activated carbon such as thatch blower fan 33, mixture generator 34, activated carbon playpipe 35；According to
The exhaust gas volumn of incinerator 1 and the amount of the generation harmful substance such as dioxin, heavy metal, the consumption of calculated activity charcoal
Amount, after electron helical claims 31 Weighings, by frequency conversion rotary feeder 32, according to operating mode, with change
The mode of rotating speed adjusts activated carbon conveying capacity, and activated carbon sends into blender 34, from high pressure roots blower fan 33
Wind-force, sends into activated carbon entrance 36 by the activated carbon falling into blender 34 by activated carbon playpipe 35 and enters
Entering in sack cleaner pipeline 37, the activated carbon sprayed into is to nuisances such as the dioxin in flue gas and heavy metals
Matter is adsorbed；
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 deacidification efficiency；
As can be seen here, the aqueous solution of urea of preparation is sprayed in burner hearth as medicament by apparatus of the present invention, at 850 DEG C～
In 1100 DEG C of temperature ranges, medicament nitrogen oxides preferentially and in flue gas carries out chemical reduction reaction, at burner hearth
Interior NOx is reduced to N2And water, thus reduce the purpose of discharged nitrous oxides concentration, its automatization's journey
Degree height, continuous to-be to medicament when can meet big exhaust gas volumn removing nitrogen oxides, use manpower and material resources sparingly；Cigarette
NOx content in flue gas is detected by gas on-Line Monitor Device, and feeds back to PLC control system, and PLC is controlled
Control frequency conversion rotary feeder, entering water electromagnetic valve after system-computed processed, regulate carbamide, the dosage of water, protect
The concentration of card preparating liquid, it is ensured that good denitration effect, it is to avoid waste, reduces operating cost；Deacidification agent is used
Less and utilization rate is high for amount, and in cyclic process, deacidification agent granule is under mutual rubbing action, the most exposed makes new advances
Surface, makes deacidification reaction constantly be sufficiently carried out, and acid removal rate is up to 90%；In whole deacidification, operation
Temperature is higher than dew point, not corrosion or condensation, produces without waste water, does not produce secondary pollution；Have de-
Acid efficiency is high, and investment operating cost is low, and reliability is high, and energy consumption is low, safeguards that easily floor space is little, system
Service life the advantage such as length, SO2Concentration of emission 70mg/Nm3, the concentration of emission 40mg/Nm of HCL3, powder
Dirt concentration of emission 15mg/Nm3, it is better than GB18485-2014 standard " consumer waste incineration Environmental capacity standard "
(SO2＜ 80mg/Nm3, HCL ＜ 50mg/Nm3, dust emission concentration ＜ 20mg/Nm3), it is possible to absorption flue gas
In dioxin, the noxious pollutant such as heavy metal, make flue gas qualified discharge, it is to avoid to environment.
Claims (1)
1. an incinerator smoke denitration in the stove dry-process deacidification device, including incinerator, flue gas on-line monitoring dress
Put, electronic air inlet valve, reaction tower, sack cleaner, main air blower, chimney, it is characterised in that burn described in:
Burn stove be linked in sequence flue gas on-Line Monitor Device, electronic air inlet valve, reaction tower, sack cleaner, main air blower,
Chimney, described flue gas on-Line Monitor Device connects PLC control cabinet, and PLC control cabinet connects frequency conversion rotary feeder,
Frequency conversion rotary feeder is connected above electron helical and claims, and electron helical claims to connect discharger, and discharger connects urine
Crude granule feed bin, connects jet mixer top and connects below frequency conversion rotary feeder, jet mixer one
Side is connected with entering water electromagnetic valve, water inlet by inlet channel, and jet mixer bottom connects dissolves case,
Side, described dissolving box top is provided with flow of inlet water instrument, flow of inlet water instrument by inlet channel and entering water electromagnetic valve,
Water inlet connects, and dissolves and is provided with blender inside case, and the motor of blender is arranged on dissolving box top, dissolves
Being provided with high level meter, low liquidometer and extremely low liquidometer inside case, described PLC control cabinet is by controlling cable
Respectively with entering water electromagnetic valve, flow of inlet water instrument, high level meter, low liquidometer, extremely low liquidometer, water pump,
Urea liquid delivery pump connects, and dissolves case and connects urea liquid delivery pump, urine by urea liquid conveyance conduit
Cellulose solution delivery pump connects urea liquid entrance by urea liquid conveyance conduit, at urea liquid delivery pump
With the urea liquid conveyance conduit of urea liquid entrance is provided with atomizer, atomizer passes through pipeline
Connecting water pump, water pump connects water tank by pipeline, and urea liquid entrance is positioned on the sidewall of incinerator burner hearth
Side, connecting bypass pipeline between described flue gas Online Monitoring Control device and electronic air inlet valve import, bypass pipe
Road is connected with main air blower import, and by-pass line is provided with bypass valve, the outlet of described electronic air inlet valve and reaction
Tower air intake connects, and reaction tower air intake bottom connects taper ash collection slot, and taper ash collection slot connects electronic unloading
Ash valve, reaction tower air intake top connect have trunnion, trunnion top be linked in sequence calcium hydroxide dust mouth,
Water jet, water jet connects water pump by pipeline, and water pump connects water tank, and water jet top connects has flue gas to go out
Mouthful, exhanst gas outlet connects sack cleaner by entering sack cleaner pipeline, enters and sets on sack cleaner pipeline
Being equipped with activated carbon entrance, activated carbon entrance connects mixture generator by activated carbon playpipe, and mixing is sent out
Sheng Qi mono-tunnel connects high pressure roots blower fan, and mixture generator is connected above frequency conversion rotary feeder, and frequency conversion rotates
Batcher connects electron helical and claims, and electron helical claims to connect discharger, and discharger connects activated carbon feed bin, cloth
Bag dust collector bottom connects air flume, and connecting bottom air flume has middle pressure roots blower, air flume
Side coupled reaction tower circulating line, reaction tower circulating line one tunnel connects recycle feed valve, and another road connects
Ash silo electrodynamic valve, ash silo electrodynamic valve connects ash silo, and ash silo bottom connects electric cinder valve, reaction tower hydroxide
Calcium dusts mouth by calcium hydroxide playpipe connection mixture generator, mixture generator one tunnel connection high pressure roots
Blower fan, mixture generator is connected above frequency conversion rotary feeder, and frequency conversion rotary feeder connects electron helical and claims,
Electron helical claims to connect discharger, and discharger connects calcium hydroxide dry powder feed bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410826168.8A CN105889961A (en) | 2014-12-14 | 2014-12-14 | In-furnace denitration and dry deacidification device for flue gas of incinerator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410826168.8A CN105889961A (en) | 2014-12-14 | 2014-12-14 | In-furnace denitration and dry deacidification device for flue gas of incinerator |
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| Publication Number | Publication Date |
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| CN105889961A true CN105889961A (en) | 2016-08-24 |
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| CN201410826168.8A Pending CN105889961A (en) | 2014-12-14 | 2014-12-14 | In-furnace denitration and dry deacidification device for flue gas of incinerator |
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| CN (1) | CN105889961A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110237636A (en) * | 2019-06-28 | 2019-09-17 | 浙江哲丰能源发展有限公司 | A kind of power plant soot fume processor |
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2014
- 2014-12-14 CN CN201410826168.8A patent/CN105889961A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110237636A (en) * | 2019-06-28 | 2019-09-17 | 浙江哲丰能源发展有限公司 | A kind of power plant soot fume processor |
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