CN206997331U - Domestic garbage incineration flyash and discarded SCR catalyst coprocessing system - Google Patents
Domestic garbage incineration flyash and discarded SCR catalyst coprocessing system Download PDFInfo
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- CN206997331U CN206997331U CN201720775219.8U CN201720775219U CN206997331U CN 206997331 U CN206997331 U CN 206997331U CN 201720775219 U CN201720775219 U CN 201720775219U CN 206997331 U CN206997331 U CN 206997331U
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Abstract
The utility model provides a kind of domestic garbage incineration flyash and discarded SCR catalyst coprocessing system,Including flying dust feed arrangement,Ozone generating-device,Flying dust catalytic oxidizing equipment,Discarded SCR catalytic oxidizing equipments and ash collecting device,Gas feed is provided with flying dust catalytic oxidizing equipment,Flying dust import,Gas vent and flying dust outlet,Air inlet and gas outlet are provided with discarded SCR catalytic oxidizing equipments,Gas feed connects with ozone generating-device,Gas vent connects with the air inlet of discarded SCR catalytic oxidizing equipments,Flying dust outlet connects with ash collecting device,Flying dust catalytic oxidizing equipment is respectively arranged with helical blade and flying dust heater in inner chamber,Flying dust feed arrangement includes ash bucket and the flying dust measured quantity dispensing device connected with the discharging opening of ash bucket,Flying dust measured quantity dispensing device and flying dust inlet communication,Catalyst assembly is provided with discarded SCR catalytic oxidizing equipments,Discarded SCR catalytic oxidizing equipments are provided with waste gas heater.
Description
Technical field
The utility model belongs to environmental protection technical field, relates generally to a kind of domestic garbage incineration flyash and discarded SCR
Catalyst coprocessing system.
Background technology
Currently, domestic rubbish disposal disposal turns into a great social concern.The annual output of National urban house refuse
For amount more than 1.5 hundred million tons, harmless treatment rate is only about 54%, and great threat is caused to ecological environment and people's health.Due to life
Incineration treatment of garbage speed living is fast, and floor space is few, and minimizing and innoxious significant effect, therefore, in China, urban land is general
It is widely used all over medium-and-large-sized city nervous, that domestic rubbish disposal pressure is big.It is but residual after consumer waste incineration
The hazardous contaminants such as bioxin, heavy metal are usually contained in excess-flying dust, it handles disposal has turned into puzzlement waste incineration
One of key issue of Technique Popularizing, have become an important factor for restricting the development of waste incineration and generating electricity technology.
The source of bioxin is numerous, and wherein incineration of waste is important dioxin emissions source.Europe, the U.S. and Japan
Emission behaviour shows, it is very high to burn Yuan dioxin emission proportions.Japan burns Yuan dioxin emission amounts for 2004 and still accounted for
The 63% of total release.China's consumer waste incineration dioxin emissions are estimated according to the domestic experimental data announced,
Assuming that incinerator year runs 330d, the flue gas yield of consumer waste incineration is 5500Nm3/ t, flying dust yield are 3%, two in flue gas
1.0ng (I-TEQ)/m that Evil English is up to state standards3, flying dust Zhong bioxin is 2.0ng (I-TEQ)/g, then mesh can be calculated
It is about 54.45g (I-TEQ)/a that preceding China's consumer waste incineration discharges bioxin total amount to air, and pass through fly ash emission two
Evil English total amounts are about 594.0g (I-TEQ)/a, equivalent to as many as 10 times of smoke discharge amount.So flying ash Zhong bioxin
Processing disposal is particularly important.
Generate bioxin in Refuse Incineration Process to be concentrated mainly in flue gas and flying dust, wherein for dioxin in flue gas
Control technology have：(1) charcoal absorption and high-effective dust-removing.The huge specific surface area of activated carbon and good adsorptivity, not only
Can adsorptive gaseous and solid-state bioxin.Flue gas purification system generally injects active carbon powder before deduster at present in segment pipe
To adsorb flue gas dioxin, trapped in downstream by deduster.However, active carbon adsorption technology is substantially to trap bioxin to separate
Out, it is transferred in solid phase (flying dust, activated carbon), further harmless treatment must be made by adsorbing the activated carbon of bioxin, the skill
Art has no consumption for bioxin total amount.(2) SCR (SCR).SCR is widely used in coal-burning power plant, plays
NO in redox flue gasXEffect.At present, part waste incineration erection of equipment SCR, research show the SCR in denitration
Have the function that to decompose bioxin, catabolite CO simultaneously2、H2O and HCl.(3) advanced oxidation.Research shows photochemical catalytic oxidation
Effective to the degraded of gaseous state Zhong bioxin, the degradation rate of total amount and toxic equivalent is more than 50%.And plasma oxidation, due to it
Oxidability is strong, good degrading effect and by common concern.More than in several Flue Gas Control Technologies, first two be comparative maturity
Technology through commercial applications, and latter two is still at the experimental stage.The first charcoal absorption adds dust settling pocket technique, only
It is to separate bioxin trapping, Dui bioxin total amounts have no consumption；Three kinds of technologies are Qi Xiang bioxin original position afterwards
Degradation technique, but deficiency is individually present：In SCR technology, catalyst poisoning is to influence the key of its stability operation；Ultraviolet light skill
Art is caused removal efficiency relatively low, reaction efficiency further improved by other method and be possible to reality due to energy efficiency
Border application technology conversion；And plasma oxidation technology, the stability of reactor is further improved, reduces its equipment and operation
Cost is possible to input commercialization and promoted.
And have for the control technology of flying dust Zhong bioxin：(1) high-temperature melting method.Using hot environment to two in flying dust
Evil English thoroughly decompose and destroyed, so as to reach the purpose of abatement bioxin.Melting temperature is higher, and resolution ratio is higher, while oxygen
The property changed atmosphere resolution ratio is higher than inert atmosphere.(2) Low Temperature Heat Treatment.Refer in the relative low temperature that treatment temperature is 300~600 DEG C
Area, kept in inert atmosphere or oxidizing atmosphere certain processing time, flying dust Zhong bioxin passes through hydrogenation/dechlorination and decomposition
The method of two kinds of path degradeds.(3) supercritical water is degraded with hydrothermal solution.Hydrothermal solution degradation technique and supercritical Water Oxidation Technology compare phase
Seemingly, when using water as medium, meeting temperature>374 DEG C, pressure>Supercritical water is obtained during 22.1MPa, in this state due to not depositing
Complete oxidation is realized so as to improve reaction efficiency in gas-liquid interface resistance to mass tranfer, and hydrothermal solution state is in subcritical state, water
Temperature and pressure is below above-mentioned critical value, in this case organic matter solubility, [H in water+]、[OH-] dramatically increase, energy
The reaction that can not be carried out under normal temperature enough occurs.(4) alkali chemical decomposition method.Chemical decomposition method is also referred to as BCD methods, suitable for Shou bioxin
The innoxious governance of class compound contaminated soil.(5) plasma method.Plasma according to its property be divided into hot plasma and
Athermal plasma, hot plasma are high-temperature plasma, 1400 DEG C of high temperature are produced by high-temperature plasma, by rubbish
Flying ash melts.This method Dui bioxin has high degradation rate, generally more than 99.9%.(6) photodissociation method.Utilize bioxin
The property of dechlorination can occur for , bioxin molecule phenyl ring under ultraviolet light, to carry out light degradation processing to it.(7) it is biological
Edman degradation Edman.Bioxin is the material of high antibacterial degraded, and the microbial strains that nature only has 5% can decompose Er Evil
English.(8) mechanochemical reaction.Refer to, by shearing, rubbing, impacting, the means such as extruding, apply the condensed state matters such as solid, liquid
Add mechanical energy, the processing method for inducing its structure and physicochemical properties to change.It is that flying dust Zhong bioxin is degraded above
Technology, compared with fume treatment technology, for the treatment technology more horn of plenty of bioxin in solid-phase media, but wherein real energy
Enough sizable application only have：High-temperature fusion technology, Low Temperature Heat Treatment, alkali chemical decomposition method these three technologies.Wherein high-temperature fusion
Technology can decompose flying dust Zhong bioxin, while solidify heavy metal contained therein, have excellent treatment effect.But the technology energy
Consume huge, cost of equipment costliness；Low Temperature Heat Treatment technology, typically there is more than 90% degradation rate, and it to flying dust bioxin
Equipment investment and operating cost are relatively low, in the part garbage burning factory input commercial Application of Japan, Germany；Alkali chemical breakdown is main
Applied to the harmless treatment of soil, Dui bioxin clearances are up to more than 90%, but the technics comparing is cumbersome, and pilot process needs
Add NaHCO3With organic solvent as additive.Other several degradation techniques are still difficult to put into due to the deficiency of itself be present
To industrial applications.
SCR catalyst is a kind of conventional catalyst, and its basic composition is V2O5-WO3-TiO2.It is generally acknowledged that SCR is urged
When the catalytic activity of agent drops to original 80%, you can think that the catalyst has inactivated, become discarded SCR catalyst.
The processing of current discarded SCR catalyst mainly has two ways：(1) directly abandoned as danger wastes, account for always being catalyzed
70% or so of agent；(2) reclaimed after pretreatment, such as through washing-drying-broken, be back to use new catalyst again
In preparation, this accounts for 30% of total catalyst or so.The utilization ratio of SCR catalyst is low.
Therefore, it is necessary to be improved to prior art.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of efficient domestic garbage incineration flyash and discarded SCR is urged
Agent coprocessing system.
In order to solve the above-mentioned technical problem, the utility model provides a kind of domestic garbage incineration flyash and discarded SCR catalysis
Agent coprocessing system, including flying dust feed arrangement, ozone generating-device, flying dust catalytic oxidizing equipment, discarded SCR catalysis oxidations
Device and ash collecting device；Gas feed, flying dust import, gas vent are provided with the flying dust catalytic oxidizing equipment and is flown
Ash outlet；Air inlet and gas outlet are provided with the discarded SCR catalytic oxidizing equipments；The gas feed fills with ozone
Connection is put, gas vent connects with the air inlet of discarded SCR catalytic oxidizing equipments, and flying dust outlet connects with ash collecting device；
Helical blade and flying dust heater are respectively arranged with the flying dust catalytic oxidizing equipment inner chamber；
The flying dust feed arrangement includes ash bucket and the flying dust measured quantity dispensing device connected with the discharging opening of ash bucket；The flying dust
Measured quantity dispensing device and flying dust inlet communication；
At least one catalyst assembly, catalyst assembly and discarded SCR are provided with the discarded SCR catalytic oxidizing equipments
The inwall connection of catalytic oxidizing equipment；Waste gas heater is provided with the discarded SCR catalytic oxidizing equipments inner chamber.
As the improvement to the utility model domestic garbage incineration flyash and discarded SCR catalyst coprocessing system：Institute
State and be provided with air-introduced machine on the gas outlet of discarded SCR catalytic oxidizing equipments.
As further changing to the utility model domestic garbage incineration flyash and discarded SCR catalyst coprocessing system
Enter：Be provided with the discarded SCR catalytic oxidizing equipments with catalyst assembly be used cooperatively can open and close opening, catalysis
Agent component inserts or pull out from opening.
As further changing to the utility model domestic garbage incineration flyash and discarded SCR catalyst coprocessing system
Enter：The catalyst assembly is by discarding the catalyst layer that SCR catalyst forms and the porous stainless for being arranged on catalyst layer both sides
Steel plate forms, and catalyst layer thickness is 5~10mm, and the aperture of porous stainless steel plate is 0.3~0.4mm；Discarded SCR catalyst is
0.5~1mm of particle diameter particle.
Technical advantage of the present utility model is：
1st, the utility model domestic garbage incineration flyash and discarded SCR catalyst coprocessing system utilize flying dust institute in itself
The catalytic performance possessed, with reference to ozone oxidation, by dioxins organic matter degradation in domestic garbage incineration flyash to be harmless or
Low toxicity material, recycle the not degradable low toxicity material in the catalytic oxidation performance deep oxidation front end of SCR catalyst, last solution
Certainly bioxin pollution problem in flying dust；
2nd, the catalyst by the use of discarded SCR catalyst as waste gas advanced treating, the repetition profit of SCR catalyst is realized
With improving the utilization ratio of SCR catalyst；
3rd, using the catalytic performance of flying dust contained metallics in itself, with reference to the booster action of ozone, by flying dust
Bioxin efficient-decomposition on the spot, a kind of new solution is provided for flying ash processing.
Brief description of the drawings
Specific embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of domestic garbage incineration flyash and discarded SCR catalyst coprocessing system；
Fig. 2 is the curve map of the ozone dosage Yu bioxin degradation rates of flying dust catalytic oxidizing equipment 3；
Fig. 3 is the curve map of the reaction temperature Yu bioxin degradation rates of flying dust catalytic oxidizing equipment 3.
Embodiment
The utility model is described further with reference to specific embodiment, but the scope of protection of the utility model is simultaneously
It is not limited only to this.
Embodiment 1, domestic garbage incineration flyash and discarded SCR catalyst coprocessing system, as Figure 1-3, including
Ozone generating-device 2, flying dust feed arrangement 1, flying dust catalytic oxidizing equipment 3, ash collecting device 5 and discarded SCR catalysis oxidations
Device 4.Gas feed 32, flying dust import 31, gas vent 33 and flying dust outlet 34 are provided with flying dust catalytic oxidizing equipment 3,
Air inlet 41 and gas outlet 42 are provided with discarded SCR catalytic oxidizing equipments 4.Gas feed 32 connects with ozone generating-device 2,
Flying dust import 31 connects with flying dust feed arrangement 1, and gas vent 33 connects with the air inlet 41 of discarded SCR catalytic oxidizing equipments 4,
Flying dust outlet 34 connects with ash collecting device 5.
Helical blade 35 is provided with the inner chamber of flying dust catalytic oxidizing equipment 3, helical blade 35 is made by the motor driven carried
Flying dust and ozone are slowly moved to flying dust outlet 34 in the state of stirring from flying dust import 31；In flying dust catalytic oxidizing equipment 3
It is furnished with flying dust heater 36 on cavity wall, flying dust heater 36 is electric heating layer, and heating-up temperature is 50~90 DEG C, and flying dust adds
Thermal 36 can heat the flying dust in flying dust catalytic oxidizing equipment 3, fortifying catalytic oxidation.Because ozone is more than 100 DEG C
Fast decoupled afterwards, so the temperature control of flying dust heater 36 is below 90 DEG C, it is ensured that ozone fast decoupled will not be made.
Flying dust feed arrangement 1 includes ash bucket 11 and the flying dust measured quantity dispensing device 12 connected with the discharging opening of ash bucket 11, flying dust
Measured quantity dispensing device 12 includes storage bin and the weighing device being arranged on below storage bin, and weighing device claims to the flying dust in storage bin
Weight, storage bin lower section are provided with outlet valve, and storage bin connects with ash bucket 11, and outlet valve connects with flying dust import 31.Flying dust passes through ash
Bucket 11 enters flying dust measured quantity dispensing device 12, and addition of the flying dust to flying dust catalytic oxidizing equipment 3 is controlled from flying dust measured quantity dispensing device 12
Amount.
At least one catalyst assembly 43 is provided with discarded SCR catalytic oxidizing equipments 4, catalyst assembly 43 is included by giving up
The catalyst layer of SCR catalyst composition is abandoned, 5~10mm of catalyst layer thickness, catalyst layer both sides are porous stainless steel plate, aperture
For 0.3~0.4mm；The particle that discarded SCR catalyst is 0.5~1mm of particle diameter, component include V2O5、WO3And TiO2.Graininess is given up
It is broken by the discarded SCR catalyst of discarded bulk to abandon SCR catalyst, discarded SCR catalyst refers to SCR catalyst through long
After time use, catalytic activity declines, and does not reach due denitration effect, is replaced SCR catalyst (the i.e. SCR catalysis got off
When the catalytic activity of agent drops to original 80%, you can think that the catalyst has inactivated, become discarded SCR catalyst).Urge
Agent component 43 uses drawer type manner, and catalyst assembly 43 is connected with cavity wall in discarded SCR catalytic oxidizing equipments 4, discards
Be provided with SCR catalytic oxidizing equipments 4 with catalyst assembly 43 be used cooperatively can open and close opening, catalyst assembly 43
It can be inserted or pull out from opening, when needing to change catalyst assembly 43, the utility model stops adding flying dust and ozone, opens
Catalyst assembly 43 is taken out after opening；Opening is at closed mode during normal work, and gas will not go out from opening leaks
Go.It is provided with waste gas heater 44 on discarded SCR catalytic oxidizing equipments 4, waste gas heater 44 is zone of heating, heating-up temperature
For 90-200 DEG C, the waste gas in the discarded SCR catalytic oxidizing equipments 4 of energy auxiliary catalysis oxidation.Discarded SCR catalytic oxidizing equipments 4
Air-introduced machine 45 is provided with gas outlet 42, air-introduced machine 45 can discharge the gas after the completion of processing from gas outlet 42, and waste gas SCR is urged
Change gas space velocity in the catalyst assembly 43 of oxidation unit 4 to control in 5000~10000/h.
It is of the present utility model to be using process：
Flying dust is added in flying dust measured quantity dispensing device 12 by ash bucket 11, passes through flying dust by the control of flying dust measured quantity dispensing device 12
Import 31 adds flying dust to flying dust catalytic oxidizing equipment 3；Meanwhile ozone generating-device 2 produces ozone, ozone is from gas feed 32
Into flying dust catalytic oxidizing equipment 3；The addition ratio of ozone and flying dust is 0.1~0.5g ozone/kg flying dusts；
Flying dust and ozone are stirred while to the He of gas vent 33 in flying dust catalytic oxidizing equipment 3 by helical blade 35
Flying dust outlet 34 promotes, and flying dust heater 36 heats auxiliary catalysis oxidation (heating-up temperature is 50-90 DEG C) in the process, gives up
It is 5000~10000/h to abandon gas space velocity in SCR catalytic oxidizing equipments 4.Contained dioxins organic matter (big portion in flying dust
Divide) CO is degraded into by catalytic ozonation2、H2O and HCl etc., or be decomposed into gaseous low molecule amount low toxicity organic matter and (also have
Fraction bioxin is not by catalysis oxidation or decomposition, i.e., the treatment effeciency of bioxin is not up to 100%.)；Flying dust is in flying dust
Residence time in catalytic oxidizing equipment 3 is more than 1min, can so make bioxin in flying dust now smelly as far as possible by catalysis oxidation
Oxygen has been also translated into oxygen.
Flying dust after the processing of flying dust catalytic oxidizing equipment 3 enters ash collecting device 5 by flying dust outlet 34, enters again afterwards
Row solidification and stabilization processing, so as to remove heavy metal classes material contained in flying dust；After the processing of flying dust catalytic oxidizing equipment 3
Waste gas enters discarded SCR catalytic oxidizing equipments 4, the auxiliary catalysis oxygen of waste gas heater 44 by gas vent 33 through air inlet 41
(heating-up temperature is 90-200 DEG C, and more than 90 DEG C, the catalytic activity of catalyst assembly 43 is excited out later, and degradation effect is just for change
It is more satisfactory, thus discarded SCR catalytic oxidizing equipments 4 temperature more than 90 DEG C after, do not detect Er Evil in its gas outlet 42
English and other gaseous organic pollutants).Because reaction temperature auxiliary catalysis aoxidizes in flying dust catalytic oxidizing equipment 3, part two
Evil English type organics are decomposed into gaseous low molecule amount low toxicity organic matter, so containing it in the waste gas come out from gas vent 33
His gaseous organic substance, now gaseous organic substance is gaseous low molecule amount low toxicity organic matter.These gaseous organic substances with
Waste gas is entered in discarded SCR catalytic oxidizing equipments 4, by the catalyst layer catalysed oxidn of catalyst assembly 43, finally
It is degraded to harmless CO2And H2O, the clean gas after processing are discharged in the presence of air-introduced machine 45 from gas outlet 42.Discarded
SCR catalyst is after further a period of time is used, and catalytic oxidation performance declines, and catalyst assembly 43 may be recovered profit afterwards
With or regeneration.
The regeneration of catalyst assembly 43 belongs to routine techniques, and ultrasonic washing is carried out using organic polymer cleaning agent.
Solidification and stabilization processing can use conventional cement solidification method, lime solidification method or chemical stabilization method.
1st, cement solidification method
Curing process is to form firming body after being mixed using curing agent with incineration of refuse flyash, so as to reduce the molten of heavy metal
Go out.Cement is most common hazardous waste curing agent, therefore carries out curing process to flying ash frequently with cement in engineering.Fly
After ash is impregnated in the matrix of cement, under certain conditions, by a series of physics, chemical action, make pollutant useless
Mobility in thing cement matrix system reduces (as more much smaller than metal ion metal oxide in formed dissolubility).Sometimes,
Some auxiliary materials are also added to promote course of reaction, granular material is become the concrete block of bonding.It is so that substantial amounts of
Waste stabilizes because of solidification.To incineration of refuse flyash carry out stabilization processes result of study show, either using washing,
Flying dust pre-treating technology, the building blocks after processing such as crushing are difficult to reach higher intensity.A huge sum of money in flying dust is studied in addition
Category leach when find, due to the influence of chlorion in flying dust, it is cured after building block in iron, copper, zinc plasma easily leach and
Cause pollutant exceeded.
2nd, lime solidification method
Lime solidification refers to lime, flyash, cement flue Dust and ore furnace clinker etc. there is ripple rope to react
(PozzolanicRe.action) the hazardous waste solidification or stabilized operation that material is carried out for curing substrate.Suitable
When catalytic environment under enter traveling wave rope to react, by the heavy metal component in waste be adsorbed in caused by colloid crystallization in.Stone
Structural strength after grey curing process is not so good as cement solidification, thus less exclusive use.There are bitumen solidification, plastic material in addition
Curing technology, from cementation solidifying, large-scale encapsulated etc., but due to technology and economic limitations, be rarely applied to consumer waste incineration
The processing of flying dust.
3rd, chemical stabilization method
Chemical stabilization technology has been developed various heavy and stabilizes skill at present to handle based on heavy metal waste
Art, such as pH value control technology, oxidation, reduction potential control technology, sedimentation, adsorption technology and ion exchange technique etc..This
Class technology is at present in terms of incineration of refuse flyash stabilization processes using less, but a developing direction.Especially medicament is steady
Fixedization has the advantages that technique is simple, stablizing effect is good, low-cost compared with other stabilization methods.
Experiment one, the flying dust (content of dioxin about 150ng/g that certain burning power plant will be derived from) according to described in embodiment 1
Method is handled, and various process parameters are as follows：Flying dust inlet amount is 10g/min, ozone dosage 0.3g/h, flying dust catalysis oxygen
The reaction temperature that makeup puts 3 is controlled at 90 DEG C, and residence time of the flying dust in flying dust catalytic oxidizing equipment 3 is about 2min.It is discarded
The heating-up temperature of SCR catalytic oxidizing equipments 4 is 90 DEG C, and gas space velocity is in 8000h-1.The properties number of flying dust and gas after processing
According to for：The flying dust Zhong content of dioxin of the discharge of flying dust outlet 34 of flying dust catalytic oxidizing equipment 3 is 20ng/g , bioxin clearances
Reach 87%；And bioxin and other gas are not detected in the gas of the discharge of gas outlet 42 of discarded SCR catalytic oxidizing equipments 4
State organic pollution.
Comparative example 1, the ozone generator 2 tested in one removed, that is, course of reaction is only passed through sky not by ozone
Gas.Course of reaction is carried out by heat catalysis；Remaining is equal to experiment one.
This device is detected as tested one, the properties data after processing are：Flying dust catalytic oxidizing equipment 3
The flying dust Zhong content of dioxin of the discharge of flying dust outlet 34 only has 39% for 92ng/g , bioxin clearances；But discarded SCR catalysis oxygen
Bioxin is not detected in the gas that the gas outlet 42 that makeup puts 4 is discharged.
Comparative example 2, by test one in discarded SCR catalytic oxidizing equipments 4 remove, only pass through flying dust catalytic oxidizing equipment 3
To handle flying ash；Remaining is equal to experiment one.
This device is detected as tested one, the properties data after processing are：Flying dust catalytic oxidizing equipment 3
The flying dust Zhong content of dioxin of the discharge of flying dust outlet 34 is that 20ng/g , bioxin clearances are 87%；Although the row of gas vent 33
Bioxin is not detected in the gas gone out, but there are other gaseous organic pollutants to detect, about concentration is in 30ng/g.
Comparative example 3, by test one in ozone dosage be changed to 0.1 and 0.5g/h respectively；Remaining is the same as experiment one.
This device is detected as tested one, the properties data after processing are：Flying dust catalytic oxidizing equipment 3
The flying dust Zhong content of dioxin of the discharge of flying dust outlet 34 is that 65ng/g and 8ng/g , bioxin clearances are 57% and 95%, and is given up
Abandon in the gas of the discharge of gas outlet 42 of SCR catalytic oxidizing equipments 4 and do not detect bioxin and other gaseous organic pollutants.This
Illustrating the removal of the addition Dui bioxin of ozone has important influence, as the removal of the increase , bioxin of ozone dosage is imitated
Fruit increases.But because ozone is also pollutant in itself, excessive ozone easily causes secondary pollution, so adding for ozone
Entering amount should control at 0.1~0.5ng/g (flying dust).
Comparative example 4, the heating-up temperature of flying dust catalytic oxidizing equipment 3 tested in one is changed to 50 DEG C and 150 DEG C respectively.Its
Remaining same experiment one.
This device is detected as tested one, the properties data after processing are：Flying dust catalytic oxidizing equipment 3
The flying dust Zhong content of dioxin of the discharge of flying dust outlet 34 are that 38ng/g and 56ng/g , bioxin clearances are 75% and 63%, and
Bioxin and other gaseous organic pollutants are not detected in the gas that the gas outlet 42 of discarded SCR catalytic oxidizing equipments 4 is discharged.
The removal of the reaction temperature Dui bioxin of this explanation flying dust catalytic oxidizing equipment 3 has an impact, and 90 DEG C or so in experiment one add
Hot temperature is optimum, and temperature reduces, and catalytic activity declines, temperature rise, the activity decrease of ozone.
Comparative example 5, the heating-up temperature of discarded SCR catalytic oxidizing equipments 4 tested in one is changed to 50 DEG C and 150 respectively
DEG C, remaining is the same as experiment one.
This device is detected as tested one, the properties data after processing are：Flying dust catalytic oxidizing equipment 3
The flying dust Zhong content of dioxin of the discharge of flying dust outlet 34 is all that 20ng/g , bioxin clearances are all 87%；Discarded at 50 DEG C
Bioxin is not detected in the gas that the gas outlet 42 of SCR catalytic oxidizing equipments 4 is discharged, but detects other gaseous state organic contaminations
Thing, about in 20ng/g or so；Two are not detected in the gas that the gas outlet 42 of 150 DEG C of discarded SCR catalytic oxidizing equipments 4 is discharged
Evil English and other gaseous organic pollutants.
Finally it should be noted that：Various embodiments above is merely to illustrate the technical solution of the utility model, rather than it is limited
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, either to which part or whole
Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from utility model
The scope of each embodiment scheme.
Claims (4)
1. domestic garbage incineration flyash and discarded SCR catalyst coprocessing system, it is characterised in that：Including flying dust feed arrangement
(1), ozone generating-device (2), flying dust catalytic oxidizing equipment (3), discarded SCR catalytic oxidizing equipments (4) and ash collecting device
(5)；Gas feed (32), flying dust import (31), gas vent (33) are provided with the flying dust catalytic oxidizing equipment (3) and is flown
Ash outlet (34)；Air inlet (41) and gas outlet (42) are provided with the discarded SCR catalytic oxidizing equipments (4)；The gas
Import (32) connects with ozone generating-device (2), gas vent (33) and the air inlet of discarded SCR catalytic oxidizing equipments (4)
(41) connect, flying dust outlet (34) connects with ash collecting device (5)；
Helical blade (35) and flying dust heater (36) are respectively arranged with flying dust catalytic oxidizing equipment (3) inner chamber；
The flying dust feed arrangement (1) includes ash bucket (11) and the flying dust measured quantity dispensing device connected with the discharging opening of ash bucket (11)
(12)；The flying dust measured quantity dispensing device (12) connects with flying dust import (31)；
Be provided with least one catalyst assembly (43) in the discarded SCR catalytic oxidizing equipments (4), catalyst assembly (43) with
The inwall connection of discarded SCR catalytic oxidizing equipments (4)；Waste gas is provided with discarded SCR catalytic oxidizing equipments (4) inner chamber to add
Thermal (44).
2. domestic garbage incineration flyash according to claim 1 and discarded SCR catalyst coprocessing system, its feature exist
In：Air-introduced machine (45) is provided with the gas outlet (42) of the discarded SCR catalytic oxidizing equipments (4).
3. domestic garbage incineration flyash according to claim 2 and discarded SCR catalyst coprocessing system, its feature exist
In：Be provided with the discarded SCR catalytic oxidizing equipments (4) with catalyst assembly (43) be used cooperatively can open and close open
Mouthful, catalyst assembly (43) inserts or pull out from opening.
4. domestic garbage incineration flyash according to claim 3 and discarded SCR catalyst coprocessing system, its feature exist
In：The catalyst assembly (43) is by discarding the catalyst layer and be arranged on the porous of catalyst layer both sides that SCR catalyst forms
Stainless steel plate forms, and catalyst layer thickness is 5~10mm, and the aperture of porous stainless steel plate is 0.3~0.4mm；Discarded SCR catalysis
Agent is 0.5~1mm of particle diameter particle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720775219.8U CN206997331U (en) | 2017-06-29 | 2017-06-29 | Domestic garbage incineration flyash and discarded SCR catalyst coprocessing system |
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| CN201720775219.8U CN206997331U (en) | 2017-06-29 | 2017-06-29 | Domestic garbage incineration flyash and discarded SCR catalyst coprocessing system |
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| CN206997331U true CN206997331U (en) | 2018-02-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159684A (en) * | 2017-06-29 | 2017-09-15 | 浙江富春江环保热电股份有限公司 | Domestic garbage incineration flyash and discarded SCR catalyst coprocessing system and method |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159684A (en) * | 2017-06-29 | 2017-09-15 | 浙江富春江环保热电股份有限公司 | Domestic garbage incineration flyash and discarded SCR catalyst coprocessing system and method |
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