CN106765266A - A kind of dangerous waste incineration flue gas multiple-effect cooling treatment technique and system - Google Patents
A kind of dangerous waste incineration flue gas multiple-effect cooling treatment technique and system Download PDFInfo
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- CN106765266A CN106765266A CN201710014826.7A CN201710014826A CN106765266A CN 106765266 A CN106765266 A CN 106765266A CN 201710014826 A CN201710014826 A CN 201710014826A CN 106765266 A CN106765266 A CN 106765266A
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- cooling
- flue gas
- waste incineration
- dangerous waste
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- 238000001816 cooling Methods 0.000 title claims abstract description 112
- 239000003546 flue gas Substances 0.000 title claims abstract description 61
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 238000004056 waste incineration Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000498 cooling water Substances 0.000 claims abstract description 27
- 239000003112 inhibitor Substances 0.000 claims abstract description 27
- 239000007921 spray Substances 0.000 claims abstract description 5
- 238000009692 water atomization Methods 0.000 claims abstract description 4
- 239000003054 catalyst Substances 0.000 claims description 20
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims description 15
- 229910000388 diammonium phosphate Inorganic materials 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 239000000779 smoke Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 235000019838 diammonium phosphate Nutrition 0.000 claims description 12
- 238000009826 distribution Methods 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 9
- 229910021592 Copper(II) chloride Inorganic materials 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000000889 atomisation Methods 0.000 claims description 5
- 238000005979 thermal decomposition reaction Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 241000628997 Flos Species 0.000 claims description 3
- 230000002411 adverse Effects 0.000 claims description 3
- 238000010531 catalytic reduction reaction Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 230000001629 suppression Effects 0.000 claims description 3
- 239000003517 fume Substances 0.000 claims description 2
- 239000003595 mist Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000000470 constituent Substances 0.000 claims 1
- 230000005764 inhibitory process Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 231100000770 Toxic Equivalency Factor Toxicity 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000002920 hazardous waste Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- ISPYQTSUDJAMAB-UHFFFAOYSA-N 2-chlorophenol Chemical compound OC1=CC=CC=C1Cl ISPYQTSUDJAMAB-UHFFFAOYSA-N 0.000 description 1
- 229910021591 Copper(I) chloride Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium group Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 description 1
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002906 medical waste Substances 0.000 description 1
- 229910001510 metal chloride Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- 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
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of dangerous waste incineration flue gas multiple-effect cooling treatment technique and system.The system includes the first cooling unit, SCR reactors, the second cooling unit, inhibitor supply unit and cooling water supply unit, first cooling unit, SCR reactors and the second cooling unit are sequentially connected in series, SCR reactors are vertically set on the first cooling unit top, second cooling unit and the first cooling unit horizontal alignment are set, inhibitor is atomized and sprayed in the first above-mentioned cooling unit by inhibitor supply unit, and cooling water supply unit will cool down water atomization and spray in the second above-mentioned cooling unit.The present invention fundamentally suppresses the generation of bioxin using cooling and the two methodses of Chemical Inhibition, solves the bottleneck that traditional chilling tower only reaches cooling effectiveness by rapidly cooling down.
Description
Technical field
The invention belongs to dangerous waste incineration smoke processing system technical field, more particularly to a kind of dangerous waste incineration cigarette
Gas multiple-effect cooling treatment technique, further relates to a kind of dangerous waste incineration flue gas multiple-effect cooling treatment system.
Background technology
Incineration technology have the advantages that minimizing degree it is high, can energy recovery, treatment effeciency it is high, be widely used in industrial hazard
The treatment of waste and medical waste.Due to hazardous waste originate it is complicated, can be produced in burning process fat-soluble high, persistence it is strong,
The great Polychlorinated biphenyls of toxicity and bioxin and Polychlorinated biphenyls and furans, are collectively referred to as bioxin, even if this pollutant is low in concentration
When toxicity it is also quite big, greatly harm is caused to environment and human body.According to the mechanism of production of bioxin, its generating process may
Occur in two temperature ranges, respectively interval (200 DEG C~500 DEG C) (Cao Yuchun, the Yan Jian and between burning back zone of high temperature incineration
China, Li Xiaodong, Chen Tong, Cen Kefa, the progress of bioxin formation mechanism in incinerator, thermal power generation, 34 (2005),
15-20), at present, use " chilling+activated carbon the emission control that bioxin is directed in the fume treatment of dangerous waste incineration factory more
The group technology of injection+bag-type dust ", but clearance can not fully meet environmental protection standard, for example, have scholar to investigate 14
The concentration of dangerous waste incineration factory , bioxin is in 0.08~31.6ng I-TEQ/Nm3In the range of, although having 9 can reach
《Dangerous waste incineration Environmental capacity standard》(GB-184842001) 0.5ng I-TEQ/Nm in3Standard, but for tentative
0.1ng I-TEQ/Nm in standard (GB-184842014)3Also certain gap, although by cold to being sprayed into high-temperature flue gas
But water, makes it quickly cross the method for " between the burning back zone " that is also easy to produce bioxin in instantaneous cooling, but be actually difficult to reach
Make to drop to less than 200 DEG C in temperature 1s to flash heat transfer, and energy denitration efficiency SCR high cannot be set in the temperature province
Reactor, therefore, need to further develop the removing process of bioxin.
Notification number discloses a kind of flue gas quenching tower structure, flue gas for the Chinese utility model patent of CN 205065769U
Enter along chilling tower body face of cylinder tangential direction, flue gas is formed spiral air flow in chilling tower cooler room, to improve drop
Warm speed；In addition notification number is a kind of for the Chinese invention patent of CN 103657343A is disclosed suppresses to produce two in incineration flue gas
The method and device of Evil English, including control cooling and quenching process, being acted on by the power and distribution grid of air-introduced machine makes spray flow
It is in fluidized state to change the inert carrier in chilling tower, at the same it is continuous to cooling water is sprayed into tower, using fluid-bed heat transfer efficiency high
The characteristics of accelerate cooling.Above invention improves chilling column efficiency to a certain extent, but only relies on the mode of cooling, by caloic
Transfer rate limitation, cannot still suppress the generation of bioxin simultaneously.
The content of the invention
It is cold it is an object of the invention to provide a kind of dangerous waste incineration flue gas multiple-effect in order to overcome the defect of prior art
But processing system, on the basis of quick cooling reduces bioxin generation, the life of bioxin is further suppressed using inhibitor
Into, the discharge of bioxin can be significantly reduced, processing cost is relatively low on the premise of environmental standard is reached, with good feasible
Property；Meanwhile, the ammonia that inhibitor is produced by thermal decomposition can in the SCR reactors that system is set nitrogen oxidation in cooperation-removal flue gas
Thing is He bioxin.
To achieve these goals, present invention employs following technical scheme：
A kind of dangerous waste incineration flue gas multiple-effect cooling treatment system, be characterized in the system include the first cooling unit,
SCR reactors, the second cooling unit, inhibitor supply unit and cooling water supply unit, first cooling unit, SCR are anti-
Answer device and the second cooling unit to be sequentially connected in series, SCR reactors be vertically set on the first cooling unit top, the second cooling unit with
First cooling unit horizontal alignment is set, and be atomized for inhibitor and the first above-mentioned cooling unit is sprayed by inhibitor supply unit
Interior, cooling water supply unit will cool down water atomization and spray in the second above-mentioned cooling unit.
In above-mentioned dangerous waste incineration flue gas multiple-effect cooling treatment system, optionally, the first cooling unit bag
The first cooling tube is included, the first cooling tube downside is provided with smoke inlet, and smoke inlet is connected with flue, in smoke inlet
Some air distribution plate I are uniformly provided with first cooling tube of top.
In above-mentioned dangerous waste incineration flue gas multiple-effect cooling treatment system, optionally, the inhibitor supply unit
Including liquor box, delivery pipe, compression pump, filter screen and the first magnetic force rotary-atomizing disk, delivery pipe is sequentially connected liquor box, pressure
Pump, filter screen and the first magnetic force rotary-atomizing disk, wherein filter screen and the first magnetic force rotary-atomizing disk are placed in the first above-mentioned cooling
In pipe.
In above-mentioned dangerous waste incineration flue gas multiple-effect cooling treatment system, optionally, the second cooling unit bag
The second cooling tube is included, the second cooling tube downside is provided with exhanst gas outlet, and exhanst gas outlet is connected with outlet pipe.
In above-mentioned dangerous waste incineration flue gas multiple-effect cooling treatment system, optionally, the SCR reactors include setting
The outlet on reactor and entrance, air distribution plate II, orifice plate, thermometer boss, screen and catalyst emission mouthful are put, in reactor
It is interior, air distribution plate II, orifice plate, thermometer boss and screen are set gradually from the bottom to top, catalyst emission mouthful is located on orifice plate side
Side, catalyst is placed on orifice plate by floss hole.
In above-mentioned dangerous waste incineration flue gas multiple-effect cooling treatment system, optionally, the cooling water supply unit
Including cooling water tank, water-supply-pipe, water pump and the second magnetic force rotary-atomizing disk, water-supply-pipe is sequentially connected cooling water tank, water pump and
Two magnetic force rotary-atomizing disks, wherein the second magnetic force rotary-atomizing disk is placed in the second above-mentioned cooling tube.
In above-mentioned dangerous waste incineration flue gas multiple-effect cooling treatment system, optionally, in the compression pump and filter screen
Between delivery pipe on be provided with stop valve.
In above-mentioned dangerous waste incineration flue gas multiple-effect cooling treatment system, optionally, the inhibitor is phosphoric acid hydrogen
Two ammoniums, mass concentration is 5~20%, can be in 300 DEG C~500 DEG C CuCl for generating Cuiization bioxin2And FeCl3It is converted into Cu
(PO3)2And Fe2(PO3)3, suppress the generation of bioxin, and in the absence of secondary pollution.
It is a further object of the present invention to provide a kind of dangerous waste incineration flue gas multiple-effect cooling treatment technique, according to the following steps
Specifically carry out：
Before diammonium hydrogen phosphate is promoted to penetrating point using compression pump in step S101, inhibitor solution case, according in flue gas
NOxContent adjusts flow, and straying quatity is 5~30g/Nm3；
Step S102, it is cooled to 550 DEG C~500 DEG C of incineration flue gas and is entered by smoke inlet, from bottom to top by first
Cooling tube, mixes, 300 with the diammonium hydrogen phosphate atomized liquid adverse current being fully atomized to 0.5 μm through the first magnetic force rotary-atomizing disk
DEG C~500 DEG C under the conditions of, the residence time is 2s, by CuCl2And FeCl3It is converted into Cu (PO3)2And Fe2(PO3)3, while generation
NH3；
The NH that step S103, diammonium hydrogen phosphate are produced by thermal decomposition3Enter SCR reactors, SCR reactors jointly with flue gas
The middle catalyst for using is V2O5-WO3/TiO2Honeycombed catalyst, average pore size is 95nm, the temperature of reactor of SCR reactors
It it is 300 DEG C, flue gas residence time in SCR reactors is 2s, the NO in flue gasxIn V2O5-WO3/TiO2Catalytic action under, with
NH3Generation catalytic reduction reaction generates nitrogen and water；
Flue gas enters the second cooling tube after step S104, denitration, cold with the atomization sprayed into through the second magnetic force rotary-atomizing disk
But water is moved in the same direction, and the residence time is 0.5s, and temperature is down to 200 DEG C, and cooling water is carried by cooling water tank through water-supply-pipe and compression pump
Rise to penetrating point.
Compared with prior art, beneficial effect is：
1), the present invention fundamentally suppresses the generation of bioxin using cooling and the two methodses of Chemical Inhibition, solves
Traditional chilling tower only reaches the bottleneck of cooling effectiveness by rapidly cooling down；
2), the inhibitor that the present invention is used have that inhibition is obvious, cheap, non-secondary pollution a little, have
Good economical and environmentally friendly benefit；
3), the NH that the inhibitor that the present invention is used is produced by thermal decomposition3As reducing agent, can be in suitable catalyst reduction reaction
Temperature setting SCR reactors, reach NO in cooperation-removal flue gasxPurpose, in SCR reactors select catalyst also have concurrently
Suppress the effect of bioxin generation, in the absence of the regeneration of bioxin.
Brief description of the drawings
Technical scheme is described in further detail below with reference to drawings and Examples, but should
Know, these accompanying drawings are only designed for task of explanation, therefore not as the restriction of the scope of the invention.Additionally, removing non-specifically
Point out, these accompanying drawings are meant only to conceptually illustrate structure construction described herein, without to be drawn to scale.
Fig. 1 is the structural representation of dangerous waste incineration flue gas multiple-effect cooling treatment system of the present invention；
Fig. 2 is the SCR structure of reactor schematic diagrames of dangerous waste incineration flue gas multiple-effect cooling treatment system of the present invention.
In figure：1- liquor boxs, 2- delivery pipes, 3- compression pumps, 4- stop valves, 5- the first magnetic force rotary-atomizings disk, 6- filter screens,
The cooling tubes of 7- first, 71- air distribution plate I, 72- smoke inlet, 8-SCR reactors, 81- reactor inlets, 82- air distribution plates II, 83-
Orifice plate, 84- thermometer boss, 85- screens, 86- catalyst emissions mouth, 87- reactor outlets, the cooling tubes of 9- second, 10- second
Magnetic force rotary-atomizing disk, 11- water pumps, 12- water-supply-pipes, 13- cooling water tanks.
Specific embodiment
Firstly, it is necessary to explanation, below will by way of example illustrate dangerous waste incineration flue gas of the present invention many
Concrete structure, feature and advantage of cooling treatment system etc. are imitated, but all of description is intended merely to what is illustrated, without answering
It is understood as forming any limitation to the present invention.Additionally, what is be described by or imply in the mentioned each embodiments of this paper appoints
Anticipate single technical characteristic, or shown or implicit any single technical characteristic in the drawings, still can be in these technologies
Proceed to be combined or delete between feature (or its equivalent), so as to obtain what no may directly be referred to herein
More other embodiments of the invention.
Incorporated by reference to referring to Fig. 1, Fig. 2, below the embodiment that is just given by this come to dangerous waste incineration cigarette of the present invention
Gas multiple-effect cooling treatment system is illustrative.
As shown in Figure 1 and Figure 2, a kind of dangerous waste incineration flue gas multiple-effect cooling treatment system, the system includes the first cooling
Unit, SCR reactors 8, the second cooling unit, inhibitor supply unit and cooling water supply unit, first cooling unit,
The cooling unit of SCR reactors 8 and second is sequentially connected in series, and SCR reactors 8 are vertically set on the first cooling unit top, and second is cold
But unit and the first cooling unit horizontal alignment are set, and be atomized for inhibitor and above-mentioned first is sprayed by inhibitor supply unit
In cooling unit, cooling water supply unit will cool down water atomization and spray in the second above-mentioned cooling unit.
Wherein, the first cooling unit includes the first cooling tube 7, and the first cooling tube downside is provided with smoke inlet 72, and flue gas enters
Mouth is connected with flue, and some air distribution plate I71 are uniformly provided with the first cooling tube above smoke inlet；Second is cold
But unit includes the second cooling tube 9, and the second cooling tube downside is provided with exhanst gas outlet 91, and exhanst gas outlet is connected with outlet pipe
It is logical.
Further, inhibitor supply unit includes liquor box 1, stop valve 4, delivery pipe 2, compression pump 3, filter screen 6 and the
One magnetic force rotary-atomizing disk 5, delivery pipe 2 is sequentially connected liquor box 1, compression pump 3, the magnetic force rotary-atomizing disk 5 of filter screen 6 and first,
The wherein magnetic force rotary-atomizing disk 5 of filter screen 6 and first is placed in the first above-mentioned cooling tube 7；Between compression pump 3 and filter screen 6
Delivery pipe 2 on be provided with stop valve 4.
Further, cooling water supply unit includes cooling water tank 13, water-supply-pipe 12, the magnetic force of water pump 11 and second rotation mist
Change disk 10, water-supply-pipe 12 is sequentially connected cooling water tank 13, the magnetic force rotary-atomizing disk 10 of water pump 11 and second, wherein the second magnetic force revolves
Turn atomizing disk 10 to be placed in the second above-mentioned cooling tube 9.
Further, SCR reactors 8 include the outlet 87 and entrance 81, air distribution plate II82, the orifice plate that are arranged on reactor
83rd, thermometer boss 84, screen 85 and catalyst emission mouthfuls 86, in reactor, set gradually from the bottom to top air distribution plate II82,
Orifice plate 83, thermometer boss 84 and screen 85, catalyst emission mouthful 86 are located at orifice plate side top, and catalyst is placed in by floss hole
On orifice plate 83.
Optimal preferred inhibitor of the invention is diammonium hydrogen phosphate, and mass concentration is 5~20%.It is interval after combustion to occur
De novo formation and predecessor synthesis be topmost bioxin constructive ways generally acknowledged at present, the i.e. carbon residue or cigarette of ash surface
Gas Zhong bioxin presoma (chlorobenzene, chlorophenol etc.) is condensed under the catalytic action of metallic compound, meeting again forms bioxin, its
In, CuCl2And FeCl3Catalytic capability much stronger than other metallic compounds the fact have been found to (Lu Shengyong, tight Jian Hua, Li Xiao
East, Chen Tong, Ni Mingjiang, Cen Kefa, experimental study-oxygen, carbon, the catalyst of de novo formation bioxin in castoff burning flying dust
Influence, Proceedings of the CSEE, 11 (2003), 178-183).By CuCl2And FeCl3Other metallic compounds are converted into,
By mass transfer and heat transfer simultaneously, the dual purpose that cooling suppresses and Chemical Inhibition bioxin is generated is can reach.
Therefore, on the basis of above-mentioned dangerous waste incineration flue gas multiple-effect cooling treatment system, there is provided a kind of dangerous
Incineration of waste flue gas multiple-effect cooling treatment technique, is specifically carried out according to the following steps：
Before diammonium hydrogen phosphate is promoted to penetrating point using compression pump 3 in step S101, inhibitor solution case 1, according to flue gas
Middle NOxContent adjusts flow, and straying quatity is 5~30g/Nm3；
Step S102, the incineration flue gas for being cooled to 550 DEG C~500 DEG C are entered by smoke inlet 72, from bottom to top by
One cooling tube 7, mixes with through the diammonium hydrogen phosphate atomized liquid adverse current of the first magnetic force rotary-atomizing disk 5 fully atomization to 0.5 μm,
Under the conditions of 300 DEG C~500 DEG C, the residence time is 2s, by CuCl2And FeCl3It is converted into Cu (PO3)2And Fe2(PO3)3, while raw
Into NH3, specifically, inhibitor diammonium hydrogen phosphate is by following chemical reaction：
2(NH4)2HPO4+CuCl2=Cu (PO3)2+4NH3+2HCl+2H2O
3(NH4)2HPO4+FeCl3=Fe2(PO3)3+6NH3+3HCl+3H2O
By CuCl2And FeCl3It is converted into Cu (PO3)2And Fe2(PO3)3, reduce or eliminate the life of metal chloride Dui bioxin
Into catalytic action；In addition inhibitor is made up of N, H, P and O element, and the element of secondary pollution can be produced without other, works as temperature
During more than 300 DEG C, above-mentioned reaction can occur in moment, and flue gas stops 2s in chilling tower can meet mass-and heat-transfer condition；
The NH that step S103, diammonium hydrogen phosphate are produced by thermal decomposition3Enter SCR reactors 8, SCR reactions jointly with flue gas
The catalyst used in device is V2O5-WO3/TiO2Honeycombed catalyst, average pore size is 95nm, the reactor temperature of SCR reactors
It is 300 DEG C to spend, and flue gas residence time in SCR reactors is 2s, the NO in flue gasxIn V2O5-WO3/TiO2Catalytic action under,
With NH3Generation catalytic reduction reaction generates nitrogen and water, specifically, reactive chemistry formula is as follows：
(NH4)2HPO4=2NH3+H2O+HPO3
4NO+4NH3+O2=4N2+6H2O
2NO2+4NH3+O2=3N2+6H2O
NH3As the NO in reducing agent, with flue gasxIn V2O5-WO3/TiO2Catalytic action under, be catalyzed in 300 DEG C
Reduction reaction generates nitrogen and water；Meanwhile, as catalyst choice V2O5-WO3/TiO2When, can also realize the de- bioxin of collaboration denitration
Purpose；
Flue gas enters the second cooling tube 9 after step S104, denitration, with the atomization sprayed into through the second magnetic force rotary-atomizing disk 10
Cooling water is moved in the same direction, and the residence time is 0.5s, and temperature is down to 200 DEG C, and cooling water is by cooling water tank through water-supply-pipe and compression pump
It is promoted to penetrating point.
Embodiment 1
The incineration plant of dangerous waste disposal center, disposal ability is 50t/d, and incineration flue gas flow is about under steady operational status
25000Nm3/ h, the content of nitrogen oxides is 1000mg/Nm3(with NO2Meter), after being burned through rotary kiln and dual firing chamber, mean temperature
For 1100 DEG C of flue gases provide heat energy into waste heat boiler as steam, temperature is reduced to 550 DEG C, afterwards into above-mentioned hazardous waste
In burning multiple-effect cooling treatment system.After treatment, the suppression efficiency of , bioxin can reach 91%, NO after measuredxSuppression
Efficiency is up to 95%.
Embodiment 2
The incineration plant of dangerous waste disposal center, disposal ability is 70t/d, and incineration flue gas flow is about under steady operational status
28000Nm3/ h, the content of nitrogen oxides is 2000mg/Nm3(with NO2Meter), difference from Example 1 is molten inhibitor
The straying quatity of liquid is 30g/Nm3.The suppression efficiency of , bioxin can reach 98%, NO after measuredxSuppression efficiency up to 99%.
Below dangerous waste incineration flue gas multiple-effect cooling treatment system of the invention is only elaborated by way of example, this
A few examples are only used for explanation principle of the invention and embodiments thereof, rather than limitation of the present invention, are not departing from the present invention
Spirit and scope in the case of, those skilled in the art can also make various modifications and improvement.Therefore, all equivalent skills
Art scheme all should belong to scope of the invention and be limited by every claim of the invention.
Claims (9)
1. a kind of dangerous waste incineration flue gas multiple-effect cooling treatment system, it is characterised in that the system include the first cooling unit,
SCR reactors (8), the second cooling unit, inhibitor supply unit and cooling water supply unit, first cooling unit, SCR
Reactor (8) and the second cooling unit are sequentially connected in series, and SCR reactors (8) are vertically set on the first cooling unit top, and second is cold
But unit and the first cooling unit horizontal alignment are set, and be atomized for inhibitor and above-mentioned first is sprayed by inhibitor supply unit
In cooling unit, cooling water supply unit will cool down water atomization and spray in the second above-mentioned cooling unit.
2. dangerous waste incineration flue gas multiple-effect cooling treatment system according to claim 1, it is characterised in that described first
Cooling unit includes the first cooling tube (7), and the first cooling tube (7) downside is provided with smoke inlet (72), smoke inlet and fume pipe
Road is connected, and some air distribution plate I (71) are equipped with the first cooling tube (7) above smoke inlet.
3. dangerous waste incineration flue gas multiple-effect cooling treatment system according to claim 2, it is characterised in that the suppression
Agent supply unit includes liquor box (1), delivery pipe (2), compression pump (3), filter screen (6) and the first magnetic force rotary-atomizing disk (5), defeated
Pipe (2) is sent to be sequentially connected liquor box (1), compression pump (3), filter screen (6) and the first magnetic force rotary-atomizing disk (5), wherein filter screen (6)
And first magnetic force rotary-atomizing disk (5) be placed in above-mentioned the first cooling tube (7).
4. the dangerous waste incineration flue gas multiple-effect cooling treatment system according to claim 1 or 2 or 3, it is characterised in that institute
The second cooling unit is stated including the second cooling tube (9), the second cooling tube (9) downside is provided with exhanst gas outlet (91), exhanst gas outlet with
Outlet pipe is connected.
5. the dangerous waste incineration flue gas multiple-effect cooling treatment system according to claim 1 or 2 or 3, it is characterised in that institute
Stating SCR reactors (8) includes the reactor outlet (87) and reactor inlet (81), air distribution plate II that are arranged on reactor
(82), orifice plate (83), thermometer boss (84), screen (85) and catalyst emission mouthful (86), in reactor, from the bottom to top according to
Secondary setting air distribution plate II (82), orifice plate (83), thermometer boss (84) and screen (85), catalyst emission mouthful (86) is positioned at orifice plate
(83) side top, catalyst is placed on orifice plate (83) by floss hole.
6. dangerous waste incineration flue gas multiple-effect cooling treatment system according to claim 4, it is characterised in that the cooling
Water supply unit includes cooling water tank (13), water-supply-pipe (12), water pump (11) and the second magnetic force rotary-atomizing disk (10), water-supply-pipe
(12) cooling water tank (13), water pump (11) and the second magnetic force rotary-atomizing disk (10) are sequentially connected, wherein the second magnetic force rotation mist
Change disk (10) to be placed in above-mentioned the second cooling tube (9).
7. dangerous waste incineration flue gas multiple-effect cooling treatment system according to claim 3, it is characterised in that in the pressure
Stop valve (4) is provided with delivery pipe between power pump (3) and filter screen (6).
8. the dangerous waste incineration flue gas multiple-effect cooling treatment system according to claim 1 or 2 or 3, it is characterised in that institute
Inhibitor is stated for diammonium hydrogen phosphate, mass concentration is 5~20%, can generated Cuiization bioxin at 300 DEG C~500 DEG C
CuCl2And FeCl3It is converted into Cu (PO3)2And Fe2(PO3)3, suppress the generation of bioxin, and in the absence of secondary pollution.
9. a kind of dangerous waste incineration flue gas multiple-effect cooling treatment technique, is specifically carried out according to the following steps：
Before step S101, inhibitor solution case (1) interior diammonium hydrogen phosphate are promoted to penetrating point using compression pump (3), according to flue gas
Constituent adjustment flow, straying quatity is 5~30g/Nm3；
Step S102, it is cooled to 550 DEG C~500 DEG C of incineration flue gas and is entered by smoke inlet (72), from bottom to top by first
Cooling tube (7), mixes with through the diammonium hydrogen phosphate atomized liquid adverse current of the first magnetic force rotary-atomizing disk (6) fully atomization to 0.5 μm,
Under the conditions of 300 DEG C~500 DEG C, the residence time is 2s, by CuCl2And FeCl3It is converted into Cu (PO3)2And Fe2(PO3)3, while
Generation NH3；
The NH that step S103, diammonium hydrogen phosphate are produced by thermal decomposition3Enter SCR reactors (8) jointly with flue gas, in SCR reactors
The catalyst for using is V2O5-WO3/TiO2Honeycombed catalyst, average pore size is 95nm, and the temperature of reactor of SCR reactors is
300 DEG C, flue gas residence time in SCR reactors is 2s, the NO in flue gasxIn V2O5-WO3/TiO2Catalytic action under, with
NH3Generation catalytic reduction reaction generates nitrogen and water；
Flue gas enters the second cooling tube (9) after step S104, denitration, with the atomization sprayed into through the second magnetic force rotary-atomizing disk (10)
Cooling water is moved in the same direction, and the residence time is 0.5s, and temperature is down to 200 DEG C, and cooling water is by cooling water tank (13) through water-supply-pipe (12)
Penetrating point is promoted to compression pump (11).
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Application publication date: 20170531 |