CN109107356A - A kind of cover-plate glass tank furnace smoke processing system - Google Patents
A kind of cover-plate glass tank furnace smoke processing system Download PDFInfo
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- CN109107356A CN109107356A CN201810949448.6A CN201810949448A CN109107356A CN 109107356 A CN109107356 A CN 109107356A CN 201810949448 A CN201810949448 A CN 201810949448A CN 109107356 A CN109107356 A CN 109107356A
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- Prior art keywords
- lye
- flue gas
- tower
- cycle tower
- cover
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- 239000005357 flat glass Substances 0.000 title claims abstract description 21
- 239000000779 smoke Substances 0.000 title claims abstract description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 97
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000003546 flue gas Substances 0.000 claims abstract description 69
- 239000007921 spray Substances 0.000 claims abstract description 65
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 53
- 238000001816 cooling Methods 0.000 claims abstract description 45
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitrogen oxide Substances O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000010521 absorption reaction Methods 0.000 claims abstract description 37
- 229910052813 nitrogen oxide Inorganic materials 0.000 claims abstract description 19
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 230000003009 desulfurizing Effects 0.000 claims abstract description 15
- 239000011521 glass Substances 0.000 claims abstract description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 84
- 239000004202 carbamide Substances 0.000 claims description 42
- 238000006243 chemical reaction Methods 0.000 claims description 32
- 238000002156 mixing Methods 0.000 claims description 31
- 239000002351 wastewater Substances 0.000 claims description 17
- 239000003054 catalyst Substances 0.000 claims description 16
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 10
- 230000001413 cellular Effects 0.000 claims description 8
- 238000004065 wastewater treatment Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 6
- 210000002700 Urine Anatomy 0.000 claims description 2
- 238000006555 catalytic reaction Methods 0.000 claims description 2
- 235000019504 cigarettes Nutrition 0.000 claims 1
- 230000000149 penetrating Effects 0.000 claims 1
- 150000003568 thioethers Chemical class 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 9
- 238000010531 catalytic reduction reaction Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 description 10
- 239000003513 alkali Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000005755 formation reaction Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- GEHJYWRUCIMESM-UHFFFAOYSA-L Sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910002089 NOx Inorganic materials 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 239000003814 drug Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 2
- 241001088417 Ammodytes americanus Species 0.000 description 1
- 241000196435 Prunus domestica subsp. insititia Species 0.000 description 1
- 210000003660 Reticulum Anatomy 0.000 description 1
- 210000003491 Skin Anatomy 0.000 description 1
- ZNOKGRXACCSDPY-UHFFFAOYSA-N Tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 1
- GNTDGMZSJNCJKK-UHFFFAOYSA-N Vanadium(V) oxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20723—Vanadium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20776—Tungsten
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a kind of cover-plate glass tank furnace smoke processing system, which is provided simultaneously with the function of removing nitrogen oxides and desulfurization；NO can be reduced into N under low temperature (300-400 DEG C) by selective catalytic reduction system operating (SCR system)2And water, reduce the requirement to flue-gas temperature, so that still being able to sufficiently be removed nitrogen oxides after reaching SCR system after radiating in pipeline from the flue gas that glass furnace comes out；Flue gas will enter absorption cycle tower after cooling cycle tower cooler and carry out desulfurization, and spray into lye in absorption cycle tower and react with the sulfide in flue gas, deviate from sulfide after removing nitrogen oxides；The present invention temperature condition different with sulfide is removed using removing nitrogen oxides, so that a system completes desulfurization and removing nitrogen oxides, process is simple, it is easy to accomplish.
Description
[technical field]
The invention belongs to cover-plate glass fume treatment fields, and in particular to a kind of cover-plate glass tank furnace smoke processing system.
[background technique]
In cover-plate glass manufacture, flue gas is the primary waste gases that tank furnace burning generates, and the main ingredient of flue gas is nitrogen oxides
And sulfide, nitrogen oxides and sulfide are the pollutant for polluting environment.The fume treatment system of cover-plate glass in the prior art
System is mostly selective non-catalytic reduction (SNCR), which carries out at high temperature, to flue gas exit temperature require compared with
It is high, it is desirable that 1200 DEG C or more, out of stock to be not thorough, higher operating costs；And SNCR technology is without removing sulfide function, it is difficult to handle
Sulfide in exhaust gas.
[summary of the invention]
It is an object of the invention to overcome the above-mentioned prior art, a kind of cover-plate glass tank furnace fume treatment system is provided
System, which is made of SCR system, cooling cycle tower and absorption cycle tower, so that the system is while removing nitrogen oxides,
Have both the effect of desulfurization.
In order to achieve the above objectives, the present invention is achieved by the following scheme:
A kind of cover-plate glass tank furnace smoke processing system, it is preferred that by the flue gas of glass furnace output via selective catalysis
Also after original system removing nitrogen oxides, spraying cooling and once desulfurization are carried out by cooling cycle tower, then passes through absorption cycle
Tower carries out secondary desulfuration, finally passes through smoke stack emission under the action of blower into atmosphere.
A further improvement of the present invention is that:
Preferably, selective catalytic reduction system operating includes the mixing arrangement and reaction unit of connection；Setting in mixing arrangement
There is urea spray gun；Urea is input in mixing arrangement via urea spray gun, and ammonia is converted in mixing arrangement；It is defeated by glass furnace
Flue gas out is input in reaction unit, anti-in mixing arrangement and after ammonia mixing via the gas vent of mixing arrangement
Answer the reaction that removing nitrogen oxides occurs in device.
Preferably, high-pressure air pipe, urea tube and water pipe are provided in urea spray gun.
Preferably, cellular catalyst is provided in mixing arrangement.
Preferably, the urea input quantity of urea spray gun is 15L/h, and the mass concentration for inputting urea is 20%.
Preferably, cooling cycle tower passes through spray alkali by spray lye cooled flue gas and once desulfurization, absorption cycle tower
Liquid secondary desulfuration；Lye input port and flue gas delivery outlet, top are provided on the side wall of cooling cycle tower and absorption cycle tower
It is provided with flue gas input port, bottom is provided with waste water delivery outlet；The first spray equipment is provided in cooling cycle tower to be used for
Lye is sprayed, the second spray equipment is provided in absorption cycle tower for spraying lye.
Preferably, the flue gas input port of cooling cycle tower and flue gas recirculation top of tower is arranged at the center of top surface；
The delivery outlet of cooling cycle tower and flue gas recirculation tower flue gas is arranged at the lower part of side wall；Cooling cycle tower or flue gas recirculation tower
The center of bottom surface is arranged in waste water delivery outlet.
Preferably, the structure of the first spray equipment and the second spray equipment is identical, each spray equipment is provided with lye
Main pipe rail is inputted, the arrival end that lye inputs main pipe rail is lye input port；Lye inputs main pipe rail in cooling cycle tower and suction
It receives in recycle column and is divided into X level-one branch, each level-one branch is divided into Y second level branch, each second level branch road is arranged
There are Z downward spray heads；Lye input main pipe rail, level-one branch and second level branch are each perpendicular to cooling cycle tower and absorption cycle
The side wall of tower；X, Y and Z is >=1 natural number.
Preferably, the waste water of cooling cycle tower and flue gas recirculation tower passes through centrifuge and is pumped into waste water treatment system.
Preferably, it is 10% that cooling cycle tower and absorption cycle tower, which spray into the mass concentration of lye, and the temperature of lye is
Room temperature, the pH value of lye are 8-9.
Compared with prior art, the invention has the following advantages:
The invention discloses a kind of cover-plate glass tank furnace smoke processing system, the system be provided simultaneously with removing nitrogen oxides and
The function of desulfurization；NO can be reduced into N under low temperature (300-400 DEG C) by selective catalytic reduction system operating (SCR system)2With
Water reduces the requirement to flue-gas temperature, so that after reaching SCR system after radiating in pipeline from the flue gas that glass furnace comes out still
So it can sufficiently be removed nitrogen oxides；Flue gas will enter after cooling cycle tower cooler and absorb after removing nitrogen oxides
Recycle column carries out desulfurization, sprays into lye in absorption cycle tower and reacts with the sulfide in flue gas, deviates from sulfide；The present invention utilizes
The nitrogen oxides temperature condition different with sulfide is removed is removed, so that a system completes desulfurization and removing nitrogen oxides,
Process is simple, it is easy to accomplish.
Further, SCR system of the invention includes mixing arrangement and reaction unit, and urea sprays mist formation by urea spray gun
Change state is converted to ammonia at a high temperature of mixing arrangement, and the NO in ammonia and flue gas is under the catalyst action of reaction unit
It reacts, NO is converted into N2And water.
Further, it is provided with water pipe in urea spray gun, periodically sprays water to pipette tips, to clean pipette tips；Urea and
Water for cleaning is atomized shape from liquid formation at spray outlet under the action of pressure duct, is used to form the urine of atomization shape
Element or cleaning pipette tips.
Further, cellular catalyst is provided in mixing arrangement, the catalyst of cellular catalyst accelerates NO and NH3It is anti-
It answers.
Further, urea spray flow is fixed on 15L/h, and crossing conference to avoid spray flow makes flue-gas temperature decline too
It is more, so that it cannot meet the processing requirement of SCR；The mass concentration of urea is set as 20%, guarantees to fill with NO in flue gas
Divide reaction.
Further, cooling cycle tower and absorption cycle tower are provided with lye input port, flue gas input port, flue gas output
Mouth and waste water delivery outlet, and the inside on two absorption towers is provided with spray equipment；Sulfide in lye and flue gas occurs anti-
Ying Hou, the flue gas for removing sulfide are discharged from flue gas delivery outlet, and the waste water of formation is discharged from waste water delivery outlet.
Further, the center of top surface is arranged in the flue gas input port on absorption tower, so that flue gas is moving down
It in the process can uniformly and alkaline reaction；The center of bottom surface is arranged in waste water, and waste water is adequately flowed out.
Further, spray equipment is made of multiple branches, and formation is sprayed layer by layer, so that the mistake that flue gas moves from the top down
Cheng Zhong, the branch being arranged by multilayer spray, and sufficiently remove the sulfide in flue gas.
Further, waste water is pumped by centrifuge into waste water treatment system, is purified in waste water treatment system, is prevented
Pollute environment.
Further, it defines the concentration for spraying into lye, guarantees abundant desulfurization.
[Detailed description of the invention]
Fig. 1 is system flow chart of the invention；
Fig. 2 is cooling cycle tower of the invention and absorption cycle tower figure structure schematic representation；
Wherein: 1- glass furnace；2- mixing arrangement；3- reaction unit；4- selective catalytic reduction system operating (SCR system)；5-
Cooling cycle tower；6- absorption cycle tower；7- chimney；8- blower；9- centrifuge；10- waste water treatment system；The input of 11- lye is total
Pipeline；12- level-one branch；13- second level branch；14- spray head.
[specific embodiment]
The invention will be described in further detail with reference to the accompanying drawing:
Referring to Fig. 1 the invention discloses a kind of cover-plate glass smoke processing system, including SCR system 4, cooling cycle tower 5,
Absorption cycle tower 6, chimney 7, blower 8, centrifuge 9 and waste water treatment system 10；SCR system 4 includes mixing arrangement 2 and reaction dress
Set 3；It is provided with urea spray gun in mixing arrangement 2, cellular catalyst is provided in reaction unit 3；It is provided in cooling cycle tower 5
First spray equipment is provided with the second spray equipment, the structure of the first spray equipment and the second spray equipment in absorption cycle tower 6
It is identical, lye input main pipe rail 11, level-one branch 12, second level branch 13 and spray head 14 are provided in each spray equipment.
The flue gas delivery outlet of glass furnace 1 is connected to the flue gas input port of mixing arrangement 2, the flue gas delivery outlet of mixing arrangement 2
It is connected to the flue gas input port in reaction unit 3, the flue gas delivery outlet of reaction unit 3 and the flue gas input port of cooling cycle tower 5
Connection, the flue gas delivery outlet of cooling cycle tower 5 are connected to the flue gas input port of absorption cycle tower 6, and the flue gas of absorption cycle tower 6 is defeated
Outlet is connected to chimney 7, and blower 8 is provided between absorption cycle tower 6 and chimney 7；Cooling cycle tower 5 and absorption cycle tower 6
Waste water delivery outlet is connected to waste water treatment system 10, at the waste water delivery outlet and waste water of cooling cycle tower 5 and absorption cycle tower 6
Centrifuge 9 is provided between reason system 10.
Urea spray gun is provided in mixing arrangement 2, urea spray gun is provided with high-pressure air pipe, urea tube and water pipe, high pressure gas
Pipe sprays into mixing arrangement 2 for providing high pressure gas, urea via urea spray gun, acts at lance outlet in pressure-air
Lower formation spray pattern, is sprayed into spray pattern into mixing arrangement 2, convenient for generating ammonia under the hot conditions of mixing arrangement 2
Gas；The ejected wash water provided by water pipe, the Flushing nozzle equally under high pressure gas effect；Ammonia is mixed with flue gas, is input to reaction
In device 3；Cellular catalyst is provided in reaction unit 3, mixed ammonia and flue gas react in cellular catalyst,
Cellular catalyst is attached with tungstic acid and vanadic anhydride as catalyst carrier, surface, since the effect of catalyst reduces
Reaction temperature.
It is provided with the first spray equipment in cooling cycle tower 5, is provided with the second spray equipment in absorption cycle tower 6, two
The structure of spray equipment is identical, and the structure of two recycle columns is also identical；The structure of recycle column is that flue gas is provided at end face center
Entrance is provided with waste water delivery outlet at bottom center, and the top of a side wall is provided with alkali liquor inlet, each alkali liquor inlet and
The lye input main pipe rail 11 of spray equipment is connected to, and the lower part of another side wall of recycle column is provided with flue gas delivery outlet；Each
Spray equipment is provided with lye input main pipe rail 11, and lye inputs main pipe rail 11 and divides in cooling cycle tower 5 or absorption cycle tower 6
For X level-one branch 12, each level-one branch 12 divides for Y second level branch 13, is provided with Z on each second level branch 13
Downward spray head 14, X, Y and Z are >=1 natural number；It is equal that lye inputs main pipe rail 11, level-one branch 12 and second level branch 13
Perpendicular to cooling cycle tower 5 or the side wall of absorption cycle tower 6；The lye of two recycle columns derives from the same lye input pipe
Road, the waste water that two recycle columns generate finally are input to waste water treatment system 10 by centrifuge 9；After being removed nitrogen oxides
Flue gas, first pass around cooling cycle tower 5, because flue-gas temperature is higher at this time (180-200 DEG C), do not have the condition of desulfurization,
Therefore lye groundwork at this time is cooled flue gas, while a small amount of desulphurization reaction, i.e. first grade desulfurizing can occur；After cooled
Flue gas from cooling cycle tower 5 outflow after, into absorption cycle tower 6, properly because of temperature (50-55 DEG C), therefore occur desulfurization it is anti-
It answers, the main sweetening process of flue gas is in absorption cycle tower 6.
The power resources of whole system flow of flue gas extract flue gas in system terminal in blower 8, i.e. blower 8, so that flue gas
After the output of glass furnace 1, it can successively pass through mixing arrangement 2, reaction unit 3, cooling cycle tower 5 and absorption cycle tower 6, finally
It is discharged from chimney 7 by blower 8；All kinds of reactions occur on the way for flowing.
Temperature setting, the flue gas exported from glass furnace 1 is through in piping input value mixing arrangement 2, mixing arrangement 2 and reaction
Temperature is 300-400 DEG C, after reacting in reaction unit 3 in device 3, and the flue-gas temperature that cooling cycle tower 5 enters is
180-200 DEG C, after the lye being injected into cooling cycle tower 5 is cooling, into absorption cycle tower 6, the temperature of lye is normal
Temperature, the reaction temperature in absorption cycle tower 6 are 50-55 DEG C.
Remove reaction of nitrogen oxides principle:
Under the conditions of high-temp combustion, NOx mainly exists in the form of NO, and NO accounts for about 95% in the NOx initially discharged, but
It is that NO easily reacts with the oxygen in air in an atmosphere, generates NOx.SCR system 4 under the action of catalyst, using honeycomb
Formula catalyst reduces reaction temperature, the NH that urea generates due to the effect of catalyst3It is 300-400 DEG C in temperature to restore NO
At N2And H2O, reaction equation are as follows:
Under aerobic environment:
4NH3+4NO+O2→4N2+6H2O (1)
4NH3+2NO+O2→3N2+6H2O (2)
Under conditions of anaerobic or anoxic:
NO+2NO2+3NH3→2N2+3H2O (3)
4NO2+8NH3→7N2+12H2O (4)
When reaction condition changes, it is possible to following side reaction occur:
4NH3+3O2→2N2+6H2O (5)
2NH3→2N2+3H2 (6)
4NH3+5O2→4NO+6H2O (7)
By the spray of urea liquid in SCR system 4, guarantee that urea spray flow is fixed on 15L/h, to avoid spray flow
Crossing conference makes the too many of flue-gas temperature decline, so that it cannot meet the processing requirement of SCR.Urea spray gun need periodically (30 days) into
Row water spray is primary, a 5min, to clean pipette tips.Urea is converted into NH under this condition3Concentration be 0.413%, and NH3's
Explosion limit is 13.5-79% in pure oxygen, is in air 16.6%~26.6% (15%~28%), so well below
Explosion limit.
Remove sulfide reaction principle:
NaOH solution absorbs SO2And the process for producing sodium sulfite is divided into the following steps:
2NaOH+SO2→Na2SO3+H2O (8)
Na2SO3+SO2+H2O→2NaHSO3 (9)
The above two formulas overall reaction are as follows:
NaOH+SO2→NaHSO3 (10)
The preparation of urea:
The preparation of urea liquid prepares the urea of 20% concentration, i.e., fills water in urea preparing tank and (fill about
1000KG), 4 bags of (50KG) urea medicaments are then added, starting blender stirs 10-15 minutes, is then poured into urea
In solution reservoir；The configuration period of urea: 1 time/7 days.
Urea liquid prepares points for attention:
(1) liquid in urea liquid storage tank be transported in SCR reactor with the flow of 15L/h (by metering pump rotate to
It is approximately equal to 15L/h at 30%), crossing conference to avoid spray flow makes the too many of flue-gas temperature decline, so that it cannot meet SCR
Processing requirement.
(2) urea spray gun front end smoke canal should be checked periodically, if discovery has clogging, be cleared up in time.
The preparation of lye (NaOH solution):
The lye of 10% concentration is prepared, i.e., fills water (filling about 1000KG) in alkali liquid tank, 4 bags of hydroxides are then added
Sodium (every bag of 25KG, total 100KG), control feed flow are 10L/h, sodium hydroxide configuration period: 1 time/4 days.
Sodium hydroxide prepares points for attention:
(1) lye is prepared in the process due to adding alkali heat release, so first slowly adding one bag, 5min is then stirred, to temperature
It decreases, then adds another bag again, not add once and be stirred for, the liquid that spilling goes out when especially paying attention to adding medicament.
(2) metering pump should be closed in process for preparation, waited and opened metering pump after having prepared again.
(3) add alkaline agent when prevent liquid splash skin and with, properly protect.
(4) 2 people's coordinating operation in process for preparation pays attention to preventing foreign matter from falling in tank.
The lye for flowing into cooling cycle tower and reaction cycle tower derives from circulatory pool, and lye sprays flowing in recycle column
Meanwhile some inflow is back to circulatory pool, need to guarantee that the pH of lye in circulatory pool is 8~9, guarantee that lye is most in the circulatory pool
The position of high point is no more than overflow port always.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of cover-plate glass tank furnace smoke processing system, which is characterized in that by the flue gas of glass furnace (1) output via selectivity
After catalyst reduction system (4) removes nitrogen oxides, spraying cooling and once desulfurization are carried out by cooling cycle tower (5), is then passed through
It crosses absorption cycle tower (6) and carries out secondary desulfuration, be finally emitted into atmosphere under the action of blower (8) by chimney (7).
2. a kind of cover-plate glass tank furnace smoke processing system according to claim 1, which is characterized in that selective catalysis is also
Original system (4) includes the mixing arrangement (2) and reaction unit (3) of connection；Urea spray gun is provided in mixing arrangement (2)；Urea
It is input in mixing arrangement (2) via urea spray gun, is converted to ammonia in mixing arrangement (2)；The cigarette exported by glass furnace (1)
Gas is input in reaction unit (3) in mixing arrangement (2) and after ammonia mixing via the gas vent of mixing arrangement (2),
The reaction of removing nitrogen oxides occurs in reaction unit (3).
3. a kind of cover-plate glass tank furnace smoke processing system according to claim 2, which is characterized in that set in urea spray gun
It is equipped with high-pressure air pipe, urea tube and water pipe.
4. a kind of cover-plate glass tank furnace smoke processing system according to claim 2, which is characterized in that mixing arrangement (2)
Inside it is provided with cellular catalyst.
5. a kind of cover-plate glass tank furnace smoke processing system according to claim 2, which is characterized in that the urine of urea spray gun
Plain input quantity is 15L/h, and the mass concentration for inputting urea is 20%.
6. a kind of cover-plate glass tank furnace smoke processing system described in -5 any one according to claim 1, which is characterized in that cold
But recycle column (5) passes through spray lye secondary desulfuration by spray lye cooled flue gas and once desulfurization, absorption cycle tower (6)；
It is provided with lye input port and flue gas delivery outlet on the side wall of cooling cycle tower (5) and absorption cycle tower (6), top is respectively provided with
There is flue gas input port, bottom is provided with waste water delivery outlet；The first spray equipment is provided in cooling cycle tower (5) for spraying
Lye, interior second spray equipment that is provided with of absorption cycle tower (6) is for spraying lye.
7. a kind of cover-plate glass tank furnace smoke processing system according to claim 6, which is characterized in that cooling cycle tower
(5) and the flue gas input port at the top of flue gas recirculation tower (6) is arranged at the center of top surface；Cooling cycle tower (5) and flue gas
The delivery outlet of recycle column (6) flue gas is arranged at the lower part of side wall；The waste water of cooling cycle tower (5) or flue gas recirculation tower (6) is defeated
The center of bottom surface is arranged in outlet.
8. a kind of cover-plate glass tank furnace smoke processing system according to claim 6, which is characterized in that the first spray equipment
Identical with the structure of the second spray equipment, each spray equipment is provided with lye input main pipe rail (11), and lye inputs general pipeline
The arrival end on road (11) is lye input port；Lye inputs main pipe rail (11) in cooling cycle tower (5) and absorption cycle tower (6)
It is divided into X level-one branch (12), each level-one branch (12) is divided into Y second level branch (13), each second level branch (13)
On be provided with the downward spray heads (14) of Z；It is vertical that lye inputs main pipe rail (11), level-one branch (12) and second level branch (13)
In the side wall of cooling cycle tower (5) and absorption cycle tower (6)；X, Y and Z is >=1 natural number.
9. a kind of cover-plate glass tank furnace smoke processing system according to claim 6, which is characterized in that cooling cycle tower
(5) pass through centrifuge (9) with the waste water of flue gas recirculation tower (6) and be pumped into waste water treatment system (10).
10. a kind of cover-plate glass tank furnace smoke processing system according to claim 6, which is characterized in that cooling cycle tower
(5) and the mass concentration of absorption cycle tower (6) penetrating lye is 10%, and the temperature of lye is room temperature, and the pH value of lye is 8-
9。
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| CN201810949448.6A CN109107356A (en) | 2018-08-20 | 2018-08-20 | A kind of cover-plate glass tank furnace smoke processing system |
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| CN201810949448.6A CN109107356A (en) | 2018-08-20 | 2018-08-20 | A kind of cover-plate glass tank furnace smoke processing system |
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