CN206377683U - A kind of dangerous waste incineration flue gas multiple-effect cooling treatment system - Google Patents
A kind of dangerous waste incineration flue gas multiple-effect cooling treatment system Download PDFInfo
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- CN206377683U CN206377683U CN201720022800.2U CN201720022800U CN206377683U CN 206377683 U CN206377683 U CN 206377683U CN 201720022800 U CN201720022800 U CN 201720022800U CN 206377683 U CN206377683 U CN 206377683U
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Abstract
The utility model discloses a kind of dangerous waste incineration flue gas multiple-effect cooling treatment 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 above the first cooling unit, 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 into the second above-mentioned cooling unit.The utility model is fundamentally suppressed the generation of bioxin, is solved bottleneck of traditional chilling tower only by rapidly cooling down and reaching cooling effectiveness using cooling and the two methodses of Chemical Inhibition.
Description
Technical field
The utility model belongs to dangerous waste incineration smoke processing system technical field, more particularly to a kind of hazardous waste burns
Burn 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 processing 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, this pollutant is low even 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 between burning back zone of high temperature incineration
The progress of bioxin formation mechanism in China, Li Xiaodong, Chen Tong, Cen Kefa, waste 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 there are 9 can reach
《Dangerous waste incineration contamination control 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 cold by 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 the high SCR of energy denitration efficiency can not 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 CN 205065769U Chinese utility model patent
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 disclosed for CN 103657343A Chinese utility model patent and produced in a kind of suppression incineration flue gas
The method and device of Sheng bioxin, including control cooling and quenching process, make spray by power and the distribution grid effect of air-introduced machine
Inert carrier in spray chilling tower is in fluidized state, while continuously spraying into cooling water into tower, is imitated using fluid-bed heat transfer
The characteristics of rate is high accelerates cooling.Above utility model improves chilling column efficiency to a certain extent, but only relies on the side of cooling
Formula, by caloic, transfer rate is limited simultaneously, can not still suppress the generation of bioxin.
Utility model content
In order to overcome the defect of prior art, the purpose of this utility model is to provide a kind of dangerous waste incineration flue gas many
Cooling treatment system is imitated, on the basis of quick cooling reduces bioxin generation, bioxin is further suppressed using inhibitor
Generation, the discharge of bioxin can be significantly reduced, processing cost is relatively low on the premise of environmental standard is reached, can with good
Row；Meanwhile, the ammonia that inhibitor is produced by thermal decomposition can in the SCR reactors that system is set nitrogen oxygen in cooperation-removal flue gas
Compound is He bioxin.
To achieve these goals, the utility model 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 are vertically set on above the first cooling unit, the second cooling unit with
First cooling unit horizontal alignment is set, and inhibitor is atomized and sprays the first above-mentioned cooling unit by inhibitor supply unit
Interior, cooling water supply unit will cool down water atomization and spray into 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
Include and smoke inlet is provided with the downside of the first cooling tube, the first cooling tube, 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
Include and exhanst gas outlet is provided with the downside of the second cooling tube, the second cooling tube, 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, and 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.
Another object of the present utility model is to provide a kind of dangerous waste incineration flue gas multiple-effect cooling treatment technique, by following
Step is specifically carried out：
Diammonium hydrogen phosphate is promoted to before 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, the incineration flue gas for being cooled to 550 DEG C~500 DEG C are entered by smoke inlet, pass through first from bottom to top
Cooling tube, is mixed with the diammonium hydrogen phosphate atomized liquid adverse current being fully atomized to 0.5 μm through the first magnetic force rotary-atomizing disk, 300
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, generate simultaneously
NH3；
The NH that step S103, diammonium hydrogen phosphate are produced by thermal decomposition3Enter SCR reactors, SCR reactions jointly with flue gas
The catalyst used in device is V2O5-WO3/TiO2Honeycombed catalyst, average pore size is 95nm, the reactor of SCR reactors
Temperature is 300 DEG C, and flue gas residence time in SCR reactors is the NO in 2s, 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 that is 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 utility model fundamentally suppresses the generation of bioxin, solution using cooling and the two methodses of Chemical Inhibition
Determine bottleneck of traditional chilling tower only by rapidly cooling down and reaching cooling effectiveness；
2), the inhibitor that the utility model is used have that inhibition is obvious, cheap, non-secondary pollution a little,
With good economical and environmentally friendly benefit；
3), the NH that the inhibitor that the utility model is used is produced by thermal decomposition3As reducing agent, it can be reduced in suitable catalyst
The temperature setting SCR reactors of reaction, reach NO in cooperation-removal flue gasxPurpose, the catalyst selected in SCR reactors
Also the effect for suppressing bioxin generation is had concurrently, in the absence of the regeneration of bioxin.
Brief description of the drawings
The technical solution of the utility model is described in further detail below with reference to drawings and examples, still
It should be known that these accompanying drawings only design for task of explanation, therefore not as the restriction of the utility model scope.In addition,
Unless otherwise indicated, these accompanying drawings are meant only to conceptually illustrate structure construction described herein, without to carry out to scale
Draw.
Fig. 1 is the structural representation of the utility model dangerous waste incineration flue gas multiple-effect cooling treatment system；
Fig. 2 is the SCR structure of reactor schematic diagrames of the utility model dangerous waste incineration flue gas multiple-effect cooling treatment system.
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-
Two magnetic force rotary-atomizing disks, 11- water pumps, 12- water-supply-pipes, 13- cooling water tanks.
Embodiment
Firstly, it is necessary to which explanation, the utility model dangerous waste incineration cigarette will be illustrated by way of example below
Concrete structure, feature and advantage of gas multiple-effect cooling treatment system etc., but all descriptions are intended merely to what is illustrated, and
It should not be construed as forming the utility model any limitation.In addition, be described by the mentioned each embodiments of this paper or
Implicit any single technical characteristic, or shown or implicit any single technical characteristic in the drawings, still can be
Proceed to be combined or delete between these technical characteristics (or its equivalent), may be without straight herein so as to obtain
Connect the more other embodiments of the present utility model referred to.
Incorporated by reference to referring to Fig. 1, Fig. 2, below the embodiment that is just provided by this utility model hazardous waste is burnt
Burn flue gas multiple-effect cooling treatment system 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 above the first cooling unit, and second is cold
But unit and the first cooling unit horizontal alignment are set, and inhibitor is atomized and sprays above-mentioned first by inhibitor supply unit
In cooling unit, cooling water supply unit will cool down water atomization and spray into the second above-mentioned cooling unit.
Wherein, the first cooling unit includes being provided with smoke inlet 72 on the downside of the first cooling tube 7, the first cooling tube, 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 being provided with exhanst gas outlet 91 on the downside of the second cooling tube 9, the second cooling tube, 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, hole being arranged on reactor
Plate 83, thermometer boss 84, screen 85 and catalyst emission mouth 86, in reactor, set gradually air distribution plate from the bottom to top
II82, orifice plate 83, thermometer boss 84 and screen 85, catalyst emission mouthful 86 are located above orifice plate side, and catalyst is by discharging
Mouth is placed on orifice plate 83.
The optimal preferred inhibitor of the utility model is diammonium hydrogen phosphate, and mass concentration is 5~20%.It is interval after combustion
De novo formation and the predecessor synthesis of generation are topmost bioxin constructive ways generally acknowledged at present, the i.e. carbon residue of ash surface
Or dioxin in flue gas presoma (chlorobenzene, chlorophenol etc.) is condensed under the catalytic action of metallic compound, meeting again forms bioxin,
Wherein, CuCl2And FeCl3Catalytic capability much stronger than other metallic compounds the fact have been found to (Lu Shengyong, tight Jian Hua, Lee
Experimental study-oxygen of de novo formation bioxin, carbon, catalysis in Xiao Dong, Chen Tong, Ni Mingjiang, Cen Kefa, castoff burning flying dust
The influence of agent, Proceedings of the CSEE, 11 (2003), 178-183).By CuCl2And FeCl3It is converted into other metal compounds
Thing, by mass transfer and heat transfer simultaneously, can reach the dual purpose that cooling suppresses and Chemical Inhibition bioxin is generated.
Therefore, there is provided a kind of dangerous on the basis of above-mentioned dangerous waste incineration flue gas multiple-effect cooling treatment system
Incineration of waste flue gas multiple-effect cooling treatment technique is specific according to the following steps to carry out：
Diammonium hydrogen phosphate is promoted to before 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, pass through from bottom to top
One cooling tube 7, is mixed with the diammonium hydrogen phosphate atomized liquid adverse current through the fully atomization to 0.5 μm of the first magnetic force rotary-atomizing disk 5,
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, it is simultaneously raw
Into NH3, specifically, inhibitor diammonium hydrogen phosphate by chemically reacting as follows：
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, reduction or elimination metal chloride Dui bioxin are given birth to
Into catalytic action；In addition inhibitor is made up of N, H, P and O element, can be produced the element of secondary pollution without other, be worked as temperature
During more than 300 DEG C, above-mentioned reaction can occur in moment, and flue gas, which 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 of SCR reactors
Temperature is 300 DEG C, and flue gas residence time in SCR reactors is the NO in 2s, 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
NH3It is used as 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, it can also realize that collaboration denitration takes off bioxin
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 that incineration flue gas flow is about under 50t/d, 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
Heat energy is provided as steam into waste heat boiler for 1100 DEG C of flue gases, temperature is reduced to 550 DEG C, afterwards into above-mentioned hazardous waste
Burn in 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 that incineration flue gas flow is about under 70t/d, steady operational status
28000Nm3/ h, the content of nitrogen oxides is 2000mg/Nm3(with NO2Meter), with the difference of embodiment 1, it is that inhibitor is molten
The straying quatity of liquid is 30g/Nm3.The suppression efficiency of , bioxin can reach 98%, NO after measuredxSuppression efficiency up to 99%.
Only elaborate dangerous waste incineration flue gas multiple-effect cooling treatment system of the present utility model by way of example above
System, this few example is only for illustrating that principle of the present utility model and embodiments thereof are used, rather than to limitation of the present utility model,
In the case of not departing from spirit and scope of the present utility model, those skilled in the art can also make various modifications and improvement.
Therefore, all equivalent technical schemes all should belong to category of the present utility model and be every claim institute of the present utility model
Limit.
Claims (7)
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 above the first cooling unit, and second is cold
But unit and the first cooling unit horizontal alignment are set, and inhibitor is atomized and sprays above-mentioned first by inhibitor supply unit
In cooling unit, cooling water supply unit will cool down water atomization and spray into 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 being provided with smoke inlet (72), smoke inlet and fume pipe on the downside of the first cooling tube (7), the first cooling tube (7)
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), exhanst gas outlet (91) is provided with the downside of the second cooling tube (9), 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
State reactor outlet (87) and reactor inlet (81), air distribution plate II that SCR reactors (8) include being 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) are located at orifice plate
(83) above side, 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 rotates 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).
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| CN106765266A (en) * | 2017-01-09 | 2017-05-31 | 中冶华天南京工程技术有限公司 | A kind of dangerous waste incineration flue gas multiple-effect cooling treatment technique and system |
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| CN106765266A (en) * | 2017-01-09 | 2017-05-31 | 中冶华天南京工程技术有限公司 | A kind of dangerous waste incineration flue gas multiple-effect cooling treatment technique and system |
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