CN107335326A - A kind of desulfuring and denitrifying apparatus - Google Patents
A kind of desulfuring and denitrifying apparatus Download PDFInfo
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- CN107335326A CN107335326A CN201710508886.4A CN201710508886A CN107335326A CN 107335326 A CN107335326 A CN 107335326A CN 201710508886 A CN201710508886 A CN 201710508886A CN 107335326 A CN107335326 A CN 107335326A
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- bellows
- flue gas
- control valve
- threshold value
- desulfuring
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- 239000003546 flue gas Substances 0.000 claims abstract description 92
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 91
- 238000002156 mixing Methods 0.000 claims description 43
- 238000005245 sintering Methods 0.000 claims description 37
- 238000001179 sorption measurement Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 abstract description 19
- 238000012545 processing Methods 0.000 abstract description 18
- 238000006477 desulfuration reaction Methods 0.000 abstract description 10
- 230000023556 desulfurization Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 9
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000013589 supplement Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 37
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 22
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 18
- 230000035945 sensitivity Effects 0.000 description 16
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 14
- 239000000203 mixture Substances 0.000 description 13
- 239000000047 product Substances 0.000 description 9
- 229910021529 ammonia Inorganic materials 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 4
- 238000003672 processing method Methods 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 125000001741 organic sulfur group Chemical group 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000004449 solid propellant Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005367 electrostatic precipitation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 125000001183 hydrocarbyl group Chemical group 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 229910001233 yttria-stabilized zirconia Inorganic materials 0.000 description 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 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
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- 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
-
- 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
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Automation & Control Theory (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention provides a kind of desulfuring and denitrifying apparatus, can carry out component analysis to the flue gas in each bellows automatically, so as to select processing unit automatically for it, and the flue gas in bellows is automatically imported to corresponding processing unit；The operating of each processing unit is automatically controlled, and controls the heat energy of each position flue gas to form mutual supplement with each other's advantages by the connection between processing unit, maximizes the desulfurization off sulfide effect of flue gas.
Description
Technical field
The present invention relates to field of Environment Protection, and in particular to a kind of desulfuring and denitrifying apparatus.
Background technology
Steel sintering flue gas multiple pollutant discharge characteristics is as follows：
Sulfur dioxide：Sinter the SO in flue gas2It is mainly derived from iron ore and solid fuel (such as coal dust).In iron ore
Sulphur exist generally in the form of sulfide, sulfate, the sulphur in bunker coal is more to be existed in the form of organic sulfur, sulfide and
Organic sulfur decompose after quickly with oxygen reaction and be oxidized to SO2。
Nitrogen oxides.NOx caused by sintering process mainly includes NO and NO2.Mainly there are two parts in NOx sources：First, burn
Ignition phase is tied, second, solid fuel ignition and pyroreaction stage.NOx the way of production mainly has 3 kinds：Under burning condition,
N in air2And O2Reaction generation thermal NO x；In combustion process, the N in air2Life is reacted with the hydrocarbon group in fuel
Into the NO predecessors such as HCN, CN be further oxided again as NOx, be Quick-type NOx；Nitrogen in fuel is in combustion
It is oxidized into fuel type NOx.
SO2Change with NOx concentration with the difference of sintering machine position：Head and tail flue gas SO2Concentration is low, middle part cigarette
Gas SO2 concentration is high；Variation tendency and SO of the NOx concentration along sintering direction2Difference, in head concentration highest, from sintering machine in the middle part of
To tail, start to gradually decrease down minimum.The different phase SO of sintering2It can be changed with NOx content, meanwhile,
The diverse location of sintering machine, the SO in the flue gas of extraction2Also differed with NOx content, and SO2Phases different with NOx content
The flue gas processing method answered also is not quite similar, and how correctly to judge the gas component in the flue gas that diverse location is extracted out, and root
Most appropriate processing method is selected to propose new problem for efforts at environmental protection personnel according to gas component, further, different positions
Can the temperature of the flue gas at place be put, and also difference be very big, at utmost utilize the own characteristic of each position flue gas, be each position
The flue gas at place automatically selects most appropriate processing method, and enables the heat energy of each position flue gas to form advantage mutual
Mend, maximize the desulfurization off sulfide effect of flue gas, finally give meet after purification national standard can discharge gas be in the application
The technical problem solved emphatically.
The content of the invention
The present invention provides a kind of desulfuring and denitrifying apparatus, can be automatically selected for the flue gas of each opening position most appropriate
Processing method, and enable the heat energy of each position flue gas to form mutual supplement with each other's advantages, maximize the desulphurization denitration effect of flue gas
Fruit, the present invention are realized with following technical scheme：
A kind of desulfuring and denitrifying apparatus, the desulfuring and denitrifying apparatus carry out desulphurization denitration for caused flue gas in sintering machine
Processing, the sintering pallet direct of travel of the sintering machine is provided with N number of bellows, the N bellows be divided into a kind of bellows,
Two class bellows and three class bellows, a kind of bellows are connected by the first control valve with adsorption tower, and the three classes bellows pass through
Three control valves connect with desulphurization system, and first control valve and the 3rd control valve are controlled by turn-key system.
Further, the two classes bellows are connected by the second control valve with denitrating system, by the second control valve with taking off
Sulphur system is connected, and when second control valve is opened, the two classes bellows link with denitrating system, and second control valve is closed
When closing, the two classes bellows are connected with desulphurization system, and second control valve is controlled by the turn-key system；
The desulphurization system flows through path along flue gas and is respectively arranged with the first mixing chamber, the first reative cell and dirt pocket, institute
Dirt pocket outlet is stated to connect with the adsorption tower；
The denitrating system flows through path along flue gas and is respectively arranged with the second mixing chamber, humidity conciliation room, the second reative cell
With collection of products room；First mixing chamber is connected with second mixing chamber by the 4th control valve, the 4th control valve
It is controlled by the turn-key system；The outlet of the collection of products room is connected by the 5th control valve with first mixing chamber, institute
State the 5th control valve and be controlled by the turn-key system.
Further, the turn-key system includes meter gas composition analysis device, gas temperature analyzer, central controller and divided
Device is controlled, the gas composition analysis device, gas temperature analyzer and the iversion controller are controlled by the central controller, described point
Device is controlled to be used to control the first control valve, the second control valve, the 3rd control valve, the 4th control valve and the 5th control valve；
The smoke outlet of each target bellows is provided with gas measuring device, the gas measuring device and master control
System connectivity with cause the turn-key system according to gas sensing result carry out gas composition analysis, the gas analyser bag
Zirconia base is included, the material of the zirconia base is yttria-stabilized zirconia, and one end of the zirconia base is side by side
The first sensitivity level and the second sensitivity level are provided with, the first sensitivity level and the second sensitivity level are submerged in the flue gas ring of two class bellows
Among border, the dorsal part of the zirconia base is provided with reference electrode, and the reference electrode is immersed among air；Described
One sensitivity level and second sensitivity level independently connect with the reference electrode；
The gas composition analysis device obtains the first electromotive force of the first sensitivity level output and second sensitivity level
Second electromotive force of output, and according to first electromotive force and the second electronic potential analysis gas component and pass analysis result
Transport to central controller；The central controller second control valve according to corresponding to the analysis result controls the two classes bellows.
Further, on the path that first mixing chamber connects with second mixing chamber, the 4th control valve
The side of first mixing chamber is provided with the first temperature sensor, second temperature sensing is provided with second mixing chamber
The measurement result of device, first temperature sensor and the second temperature sensor is transmitted to gas temperature analyzer；
The gas temperature analyzer passes the temperature T1 of the temperature T2 of the second mixing chamber got and the first mixing chamber
Central controller is transported to, the central controller is according to the temperature T2 of the second mixing chamber, the temperature T1 of the first mixing chamber and the second mixing chamber
The gas of the mixing chamber of volume calculations first flow into the target flow of the second mixing chamber, and adjusted according to the target flow
4th control valve.
Further, the so2 concentration in flue gas in a kind of bellows is less than Second Threshold less than first threshold, NOx concentration,
And flue-gas temperature is less than the 4th threshold value, two class bellows NOx concentrations are higher than the 3rd threshold value, and temperature is less than the 5th threshold value, three
Class bellows NOx concentration is less than the 3rd threshold value, and temperature is higher than the 5th threshold value.
Further, the first threshold is less than the atmospheric emission standard of SO2 concentration, and the Second Threshold is dense less than NOx
The atmospheric emission standard of degree, the 3rd threshold value are to carry out the critical value of denitration process；4th threshold value is that flue gas is carried out
The critical value of pre- recuperation of heat, the critical value of the 5th threshold value heat exchange between progress flue gas.
The beneficial effects of the invention are as follows：
The present invention provides a kind of desulfuring and denitrifying apparatus, possesses following beneficial effects：
(1) component analysis is carried out to the flue gas in each bellows automatically, so as to select processing unit automatically for it, and will
Flue gas in bellows is automatically imported corresponding processing unit；
(2) operating of each processing unit is automatically controlled, and it is each by the connection control between processing unit
The heat energy of position flue gas can form mutual supplement with each other's advantages, maximize the desulfurization off sulfide effect of flue gas.
Brief description of the drawings
Fig. 1 is SO provided in an embodiment of the present invention2With NOx change in concentration schematic diagram；
Fig. 2 is desulfuring and denitrifying apparatus structural representation provided in an embodiment of the present invention；
Fig. 3 is desulfuring and denitrifying apparatus connected relation schematic diagram provided in an embodiment of the present invention；
Fig. 4 is control system schematic diagram provided in an embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with accompanying drawing
It is described in detail on step ground.
Sintering circuit is the important step of steel production, and raw material contains in sintering process sulfide, nitride pass through
The pollutants such as chemical reaction generation sulfur dioxide, nitrogen oxides, are sintered flue gas carrying.
Sintering flue gas is different from other dusty gases, there is its exclusive particularity.Along the sintering machine, different bellows are taken out
The flue gas composition gone out has obvious difference.So that bellows number is 24 as an example, as shown in figure 1, being learnt by test, SO2And NOx
Concentration with sintering machine position difference and change：Head and tail flue gas SO2Concentration is low, middle part flue gas SO2Concentration is high；NOx
Variation tendency and SO of the concentration along sintering direction2Difference, in head concentration highest, from sintering machine middle part to tail, start gradual
Drop to minimum.The flue gas mean temperature of sintering machine stem, SO2Relatively low with NOx content, this partial fume need not enter
The processing of row desulphurization denitration；Flue gas SO in the middle part of sintering machine2It is higher with NOx, but mean temperature is relatively low, this partial fume needs
Desulphurization denitration processing is carried out, but its temperature is relatively low to cause desulphurization denitration treatment effect poor；Sintering machine tail flue gas
SO2Content is higher, it is necessary to carry out desulfurization process, but its temperature is again higher, it is clear that in the middle part of sintering machine and sintering machine afterbody
Flue gas needs to use chemical method to carry out desulfurization and/or denitration process to it, and this generates two problems：(1) determine it is specific which
The flue gas of a little bellows handles without desulphurization denitration, carries out desulphurization denitration processing or carry out desulfurization process；(2) sintering machine afterbody
Flue-gas temperature it is too high, can the flue-gas temperature in the middle part of sintering machine be too low, realize that the heat energy of both flue gases is complementary, lifting pair
The effect of flue gas desulfurization and denitrification in the middle part of sintering machine, and lift the effect for sintering machine afterbody flue gas desulfurization.
To realize above-mentioned two technical problem, a kind of desulfuring and denitrifying apparatus of the embodiment of the present invention, as shown in Fig. 2 described de-
Sulphur denitrification apparatus carries out desulphurization denitration processing for caused flue gas in sintering machine, along the sintering pallet row of the sintering machine
Enter direction and be provided with N number of bellows, N number of bellows are divided into a kind of bellows 1, two class bellows 2 and three class bellows 3, a kind of wind
Case 1 is connected by the first control valve 11 with adsorption tower 4, and the three classes bellows 3 are connected by the 3rd control valve 31 with desulphurization system 5
Logical, first control valve 11 and the 3rd control valve 31 are controlled by turn-key system (not shown).
Specifically, the two classes bellows 2 are connected by the second control valve 21 with denitrating system 6, pass through the second control valve 21
It is connected with desulphurization system 5, when second control valve 21 is opened, the two classes bellows 2 are connected with denitrating system 6, and described second
When control valve 21 is closed, the two classes bellows 2 are connected with desulphurization system 5, and second control valve 21 is controlled by the master control system
System；When second control valve 21 is opened, flue gas is discharged after denitrating system 6, desulphurization system 5 and adsorption tower 4, works as institute
When stating the closing of the second control valve 21, flue gas is discharged after desulphurization system 6 and adsorption tower 4.
As shown in figure 3, the desulphurization system flows through path along flue gas is respectively arranged with the first mixing chamber, the first reative cell
And dirt pocket, the dirt pocket outlet connect with the adsorption tower；
The denitrating system flows through path along flue gas and is respectively arranged with the second mixing chamber, humidity conciliation room, the second reative cell
With collection of products room；First mixing chamber is connected with second mixing chamber by the 4th control valve, the 4th control valve
It is controlled by the turn-key system；The outlet of the collection of products room is connected by the 5th control valve with first mixing chamber, institute
State the 5th control valve and be controlled by the turn-key system.
Specifically, SO in the flue gas in a kind of bellows2It is relatively low with NOx and temperature is relatively low, two class bellows SO2And NOx
Concentration is higher and temperature is relatively low, three class bellows SO2Higher and NOx is relatively low, temperature is higher, a kind of bellows, two class bellows and three
Class bellows are laid along sintering pallet direct of travel.
In the desulfuring and denitrifying apparatus described in the present embodiment, realize for part of smoke (two class bellows) by passing through
It is discharged after denitrating system, desulphurization system and adsorption tower, for another part flue gas (three class bellows) through desulphurization system and absorption
It is discharged after tower, it is achieved thereby that the purpose handled respectively by its own component for the flue gas of sintering machine different piece.
As shown in figure 4, to realize that the automation of the automated analysis of flue gas composition and flue gas processing device selects, it is described
Turn-key system includes gas composition analysis device, gas temperature analyzer, central controller and iversion controller, the gas composition analysis device,
Gas temperature analyzer and the iversion controller are controlled by the central controller, and the iversion controller is used to controlling the first control valve, the
Two control valves, the 3rd control valve, the 4th control valve and the 5th control valve；
The smoke outlet of each target bellows is provided with gas measuring device.The target bellows are to be uncertain
The bellows of two class bellows or three class bellows, that is, exclude (a kind of wind can be defined as positioned at some bellows of sintering machine stem
Case), and other bellows outside some bellows (three class bellows can be defined as) of sintering machine afterbody.Specifically, it is a kind of
The quantity of bellows and three class bellows can rule of thumb be set.The gas measuring device is connected to cause with turn-key system
State turn-key system and gas composition analysis is carried out according to gas sensing result.
The gas measuring device includes zirconia base, and the material of the zirconia base aoxidizes for stabilized with yttrium oxide
The first sensitivity level and the second sensitivity level, the first sensitivity level and the second sensitivity has been arranged side by side in zirconium, one end of the zirconia base
Level is submerged among the flue gas environment of two class bellows, and the dorsal part of the zirconia base is provided with reference electrode, the reference
Electrode is immersed among air；First sensitivity level and second sensitivity level independently connect with the reference electrode；Institute
The first sensitive pole is stated to be made up of the composite of 5~8mole% zirconia ceramics material of NiO and yttria content；
The second sensitive pole is made up of CuO layers and coating, coating by the 0~10Vol% of element containing Mn spinel system
Into.
The gas composition analysis device obtains the first electromotive force of the first sensitivity level output and second sensitivity level
Second electromotive force of output, and according to first electromotive force and the second electronic potential analysis gas component and pass analysis result
Transport to central controller；The central controller second control valve according to corresponding to the analysis result controls the two classes bellows.
Specifically, the corresponding relation being stored with the gas composition analysis device between the first electromotive force and NO concentration, with
And second electromotive force and NO2Corresponding relation between concentration, the gas composition analysis device is according to the first electromotive force and the second electricity
Kinetic potential analyzes NOx concentration, and NOx concentration is transmitted to central controller, if the concentration of NOx concentration is more than predetermined threshold value,
Then illustrate that current flue gas needs denitration, then bellows corresponding to the flue gas are two class bellows, and central controller controls the bellows corresponding
The second control valve open；If the concentration of NOx concentration is not more than predetermined threshold value, illustrate that current flue gas does not need denitration,
Then bellows corresponding to the flue gas are three class bellows, and central controller controls the second control valve corresponding to the bellows to close.
In the control process of reality, the so2 concentration in flue gas in a kind of bellows is less than less than first threshold, NOx concentration
Second Threshold, and flue-gas temperature is less than the 4th threshold value, two class bellows NOx concentrations are higher than the 3rd threshold value, and temperature is less than the
Five threshold values, three class bellows NOx concentrations are less than the 3rd threshold value, and temperature is higher than the 5th threshold value.
The first threshold is less than the atmospheric emission standard of SO2 concentration, and the Second Threshold is less than the air of NOx concentration
Discharge standard, the 3rd threshold value are to carry out the critical value of denitration process；4th threshold value is to carry out pre- recuperation of heat to flue gas
Critical value, the 5th threshold value for carry out flue gas between heat exchange critical value.Therefore, the flue gas in a kind of bellows need not
It is chemically treated also without pre- recuperation of heat is carried out, can be directly entered after adsorption tower carries out adsorbing powder dust and be discharged into air；Two
The flue gas of class bellows needs to carry out denitration process, therefore enters denitrating system, big by being discharged into after desulphurization system and adsorption tower
Gas；The flue gas of three class bellows needs not move through denitrating system, can be discharged into air after desulphurization system and adsorption tower.Need
, it is emphasized that although the flue gas in three class bellows also has part NOx, and desulphurization system also possesses certain clear energy to NOx
Power, therefore, the flue gas in three class bellows need not pass through the processing of denitrating system again.
By said apparatus, the embodiment of the present invention has automatically determined the flue gas of which specific bellows without desulphurization denitration
Processing, carry out desulphurization denitration processing or carry out desulfurization process, and the place according to corresponding to flue gas composition switches it in real time can be realized
Manage the function of device.
Further, from the foregoing, the flue-gas temperature in two class bellows is less than the 5th threshold value, and in three class bellows
Temperature is higher than the 5th threshold value, it is seen that the flue gas in flue gas and three class bellows in two class bellows possesses the condition of heat exchange, this hair
Bright embodiment still further provides a kind of denitrification apparatus, and the denitrification apparatus can make full use of the heat resource of flue gas, real
Existing waste heat recycles.Due to sintering machine itself work characteristics, the temperature of the flue gas of three class bellows will be far above the cigarette of two class bellows
Temperature degree, and the flue gas of three class bellows initially enters desulfurizer, therefore, flue gas is drawn from the first mixing chamber of desulfurizer
To the second mixing chamber of denitrification apparatus, so as to which the flue gas in the second mixing chamber is controlled in default temperature by flue gas Heat transmission
Spend in section, in the temperature range, the denitrification apparatus can reach best denitration effect.
To ensure the temperature of the flue gas in the second mixing chamber in the temperature range, in first mixing chamber and institute
On the path for stating the connection of the second mixing chamber, the 4th control valve is provided with the first temperature close to the side of the first mixing chamber and passed
Sensor, second temperature sensor is provided with second mixing chamber, and first temperature sensor and the second temperature pass
The measurement result of sensor is transmitted to gas temperature analyzer；
The gas temperature analyzer passes the temperature T1 of the temperature T2 of the second mixing chamber got and the first mixing chamber
Central controller is transported to, the central controller is according to the temperature T2 of the second mixing chamber, the temperature T1 of the first mixing chamber and the second mixing chamber
The gas of the mixing chamber of volume calculations first flow into the target flow of the second mixing chamber, and adjusted according to the target flow
4th control valve, so as to control the temperature of the second mixing chamber, it is ensured that the temperature of the second mixing chamber temperature range scope it
It is interior, and take full advantage of the heat resource of the first mixing chamber.
Specifically, the denitrification apparatus includes the second mixing chamber, humidity reconciles room, the second reative cell and collection of products room.
If the temperature range of second mixing chamber is [TA,TB], after carrying out humidity regulation by the humidity regulation room, second is anti-
The temperature range for answering room is [TC,TD], temperature range is [TC,TD] be denitration reaction optimal reaction temperature section.
There is an ammonia air inlet in described second reative cell this set, the ammonia air inlet is used for described second
Reative cell inputs ammonia, is provided with the 6th control valve at the ammonia air inlet, the 6th control valve is controlled by the master control
System.Some exit window positioning table are additionally provided with second reaction chamber wall, are respectively mounted outside each exit window positioning table
One electronic generator, the electronic generator include the vacuum chamber with one fixed width；It is used to generate electronics in vacuum chamber
Electron generating；And elongate nozzle, the elongate nozzle extend from vacuum chamber along the longitudinal axis, frame at the nozzle tip
If on the exit window positioning table, exit window erecting bed described in the electronic eyes of electronic generator generation injects described second
Reative cell；The electronic generator is controlled by the turn-key system.
The ammonia air inlet of second reative cell sprays into ammonia.After flue gas enters the second reative cell, in the effect of electronics
Under, substantial amounts of free radical is produced, makes the NOx and NH3 progress in flue gas complicated and the ammonium nitrate particulate that chemically reacts rapidly, so as to
Realize denitration.
Further, into collection of products room, with electrostatic precipitation mode, the ammonium nitrate in flue gas is trapped.Finally by being located at
The scrapper conveyor of collection of products room bottom scrapes, and is packed or stored to realize the recycling of denitration product, via collection of products
NOx in the flue gas that room comes out has been able to reach national regulation concentration, and it is again introduced into the first mixed gas via the 5th control valve
Room, enter adsorption tower after the processing of desulphurization system together with the flue gas in the three class bellows for needing desulfurization, finally via suction
Attached tower is discharged into air.Specifically, a large amount of micro activated carbon particles are laid with the adsorption tower.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (5)
1. a kind of desulfuring and denitrifying apparatus, the desulfuring and denitrifying apparatus is carried out at desulphurization denitration for caused flue gas in sintering machine
Reason, it is characterised in that the sintering pallet direct of travel of the sintering machine is provided with N number of bellows, N number of bellows are divided into one
Class bellows, two class bellows and three class bellows, a kind of bellows are connected by the first control valve with adsorption tower, the three classes bellows
Connected by the 3rd control valve with desulphurization system, first control valve and the 3rd control valve are controlled by turn-key system.
A kind of 2. desulfuring and denitrifying apparatus as claimed in claim 1, it is characterised in that：
The two classes bellows are connected by the second control valve with denitrating system, are connected by the second control valve with desulphurization system, institute
When stating the unlatching of the second control valve, the two classes bellows link with denitrating system, when second control valve is closed, the two classes wind
Case is connected with desulphurization system, and second control valve is controlled by the turn-key system.
A kind of 3. desulfuring and denitrifying apparatus as claimed in claim 2, it is characterised in that：
The desulphurization system flows through path along flue gas and is respectively arranged with the first mixing chamber, the first reative cell and dirt pocket, described to remove
The outlet of dirt room connects with the adsorption tower；
The denitrating system flows through path along flue gas and is respectively arranged with the second mixing chamber, humidity conciliation room, the second reative cell and production
Thing collecting chamber.
A kind of 4. desulfuring and denitrifying apparatus as claimed in claim 1, it is characterised in that：
SO in flue gas in a kind of bellows2Concentration is less than Second Threshold less than first threshold, NOx concentration, and flue-gas temperature is less than
4th threshold value, two class bellows NOx concentrations are higher than the 3rd threshold value, and temperature is less than the 5th threshold value, and three class bellows NOx concentrations are less than
3rd threshold value, and temperature is higher than the 5th threshold value.
A kind of 5. desulfuring and denitrifying apparatus as claimed in claim 1, it is characterised in that：
The first threshold is less than SO2The atmospheric emission standard of concentration, air discharge mark of the Second Threshold less than NOx concentration
Standard, the 3rd threshold value are to carry out the critical value of denitration process；4th threshold value is to carry out the critical of pre- recuperation of heat to flue gas
Value, the critical value of the 5th threshold value heat exchange between progress flue gas.
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