CN209490672U - A kind of flue gas system for the ultra-clean processing of cement kiln tail gas - Google Patents
A kind of flue gas system for the ultra-clean processing of cement kiln tail gas Download PDFInfo
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Abstract
The utility model provides a kind of flue gas system for the ultra-clean processing of cement kiln tail gas, including sequentially connected oxidation and denitration reactor, the absorption tower CFB, deduster and chimney；The entrance of oxidation and denitration reactor is connected by flue and the outlet of kiln tail bag filter, the outlet of the oxidation and denitration reactor is connect by flue with the air inlet on the absorption tower CFB, the gas outlet on the absorption tower CFB is connect by flue with the air inlet of the deduster, and the gas outlet of the deduster is connect by flue with the chimney.The utility model uses dry type coupled desulfurization denitration technology, can effectively remove nitrogen oxides, the oxysulfide in flue gas, reaches country to the laws and regulations requirement of flue gas pollutant minimum discharge, and generates without waste water, secondary pollution, while by-product resourcebility utilizes.
Description
Technical field
The utility model relates to a kind of flue gas systems for the ultra-clean processing of cement kiln tail gas, are suitable for cement industry flue gas
Minimum discharge processing.
Background technique
In the case where Present Thermal Power industry prevention and control of air pollution reach a certain height, the non-electrical row such as steel, metallurgy, building materials
Industry has also pulled open rapidly the prelude for proposing mark transformation.For the prevention and control of air pollution of non-electrical industry, State Ministry of Environmental Protection and each place province
Municipal government has issued a series of stringenter pollutant emission standards and supporting policy, and in June, 2017, Chinese Ministry of Environmental Protection is repaired with issuing
The form for changing list (exposure draft), to 20 country's pollutions such as " steel sintering, pelletizing industrial air pollution object discharge standard "
Object discharge standard is modified (comprising cement industry air pollution emission standard).Up to now, multiple provinces propose
Cement industry depth denitration requirement, the improvement of cement furnace flue gas pollutant will also enter the minimum discharge epoch.
Traditional cement furnace kiln exit gas NOXImprovement generallys use SNCR (selective non-catalytic reduction) denitration, still
Its reaction is restricted by temperature window, is strict with reaction temperature at 850~950 DEG C, and SNCR denitration efficiency only has 50%, basic nothing
Method meets minimum discharge requirement.In addition widely applied SCR (SCR technology) denitration in coal-burning power plant, although
Denitration efficiency is high, but due to containing high CaO in cement furnace exhaust gas dust, denitrating catalyst poisoning blocking is easy to cause to lose
Effect, thus can not also promote and apply.In addition, CaO itself can be stripped of in advance using the moisture in flue gas it is most
SO2, therefore SO2Content is very low.In face of increasingly strict emission request, it only is unable to reach emission limit by the absorption of flue gas itself,
Therefore it researches and develops one kind and can be realized simultaneous SO_2 and NO removal and do not interfere with each other suppression, or the ultra-clean processing unit with promotion that intercouples
It is of great significance.
Utility model patent CN206474002U discloses a kind of gas cleaning for new type nonaqueous cement stove kiln tail
System, the utility model are provided with scrubbing tower after oxidation and denitration reactor, can absorb the generation of oxidation and denitration reactor simultaneously
SO in high-valence state nitrogen oxides and flue gas2, the washing slurries used is NaOH or CaCO3, which can reach
To higher removal efficiency, but the system needs more slurry circulating pumps, there are problems that the processing of waste water, and its flue gas pair
Flue, chimney have corrosion, and need to remove chimney white plume by smoke re-heater, and by-product needs desiccation, technique
It is more complex.
Utility model patent CN103566725B discloses a kind of circulating fluid bed semi-drying method combined desulfurization and denitration demercuration dress
It sets and method, mainly includes ozone generator, dilution air, mixing surge tank, ozone distributor and recirculating fluidized bed (CFB)
Reaction tower, after mixing through mixing surge tank, spray into flue by ozone distributor: the flue gas after oxidation is sent the ozone of generation
Enter recirculating fluidized bed reaction tower, NOx, S02 and S03 in flue gas in reaction tower with Ca base absorbant atomized water effect into
Row reaction, removes while realizing SOx and NOx.The utility model realizes combined desulfurization and denitration performance, but desulfurization in the technique
The separation of ash and circulation are to be realized by cyclone separator, and the separating capacity of cyclone separator is limited by air quantity, furthermore
Desulphurization can cause to be seriously worn to separator inlet and inner wall, in addition, the technique middle charging aperture is set to venturi expansion segment,
Venturi is influenced to be distributed the acceleration of flue gas and flow field in tower.
Utility application CN103990375A discloses a kind of semidry method sintering flue gas integrated purifying method, can
High-efficiency desulfurization, denitration, de- dioxin and heavy metal are carried out to sintering flue gas, the cigarette before semi-dry desulphurization system absorbing reaction tower
In feed channel, access oxidant occurs and distributor, the oxidant uniformly sprayed into are sufficiently reacted with the NO in flue gas, by flue gas
In NO be oxidized to N02 after, enter back into absorbing reaction tower and reacted with absorbent, removing desulphurization and denitration, removing dioxin and
Heavy metal.The utility model can realize that sintering flue gas desulfurization denitration takes off dioxin removing heavy-metal integrated purifying purpose, but the work
Skill be using calcium hydroxide cream as absorbent, the easy fouling of system and blocking, and need special equipment carry out absorbent preparation,
Thus investment cost is bigger than normal, and absorbent utilization rate is not high, and ideal range is still not achieved in desulfuration efficiency.
Utility model content
The utility model is to solve the problems, such as that reaction is insufficient, denitration efficiency is low, emission limit is increasingly strict, provides one kind
For the flue gas system of the ultra-clean processing of cement kiln tail gas, which uses dry type coupled desulfurization denitration technology, can effectively improve
Denitration efficiency reduces SO2Concentration of emission, while its Desulphurization can create certain economic value with resource utilization.
The technical solution of the utility model is as follows:
A kind of flue gas system for the ultra-clean processing of cement kiln tail gas, including sequentially connected oxidation and denitration reactor, CFB
Absorption tower, deduster and chimney；The entrance of the oxidation and denitration reactor is connected by flue and the outlet of kiln tail bag filter,
The outlet of the oxidation and denitration reactor is connect by flue with the air inlet on the absorption tower CFB, and the absorption tower CFB goes out
Port is connect by flue with the air inlet of the deduster, and the gas outlet of the deduster is connected by flue and the chimney
It connects；The absorption tower CFB has the venturi section arranged from bottom to top, cone section and direct tube section, and configure air inlet, feed inlet,
Gas outlet and return port；The deduster is bag filter or electric precipitator；The deduster is that bag filter or electricity remove
Dirt device.
As a preferred embodiment, which further includes technique water system, and the technique water system includes process water
Case, the first water pump, desulfuring spray gun, the technique water tank are connected by one end of the first water pump and desulfuring spray gun, the desulfurization spray
The other end of rifle is connect with the absorption tower CFB.
As a preferred embodiment, the desulfuring spray gun is installed perpendicular to the cone section tower wall on the absorption tower CFB.
As a preferred embodiment, which further includes absorbent preparation and supply system, the absorbent preparation
It include quick lime storehouse, Dry slaker, cyclone separator, surge bunker and niter ash cellar with supply system；The Dry slaker
Feed inlet be connected with the discharge port in quick lime storehouse, the entrance of the cyclone separator is connected with the discharge port of Dry slaker,
The outlet of the cyclone separator is connected with the entrance of surge bunker, and two of surge bunker outlets enter with niter ash cellar respectively
Mouth is connected with the return port of Dry slaker, and the outlet of the niter ash cellar is connected with the feed inlet on the absorption tower CFB.
As a preferred embodiment, the feed inlet on the absorption tower CFB is set to below venturi section, by absorbent and flue gas one
It rises to enter after venturi section accelerates and enters direct tube section.
As a preferred embodiment, which further includes technique water system, and the technique water system includes the second water
It pumps and digests spray gun, the technique water tank is connect by the second water pump with the one end for digesting spray gun, described to digest the another of spray gun
End is connect with the Dry slaker.
As a preferred embodiment, the Dry slaker uses fluidized-bed process.
As a preferred embodiment, the Dry slaker is empty tower structure.
As a preferred embodiment, which further includes Desulphurization circulation and transportation system, the Desulphurization circulation
It include that air flume and the storehouse pump with transportation system；One end of the air flume is connect with the ash bucket of the deduster, separately
One end is connect with the return port on the absorption tower CFB；The entrance of the storehouse pump is connect with the ash bucket of the deduster, the storehouse pump
Outlet connect with the entrance of the ash silo.
The utility model has the advantages that
(1) system carries out denitrating flue gas using oxidizing process, and this method is by spraying into strong oxygen in the absorption tower CFB gas approach
The NO for being not easy to absorb is oxidized to the NO for being easy to be absorbed by lye by agent ozone3And N2O5Deng, thereafter in absorption tower by NOx and
SO2It removes.Compared to SCR/SNCR gas denitrifying technology, the advantage of oxidizing process is no the escaping of ammonia, and oxidizing process does not have SCR to urge
The requirement of agent reaction temperature window, occupied area is small, easy to operate, can also combine with desulfurizer, realizes SO in flue gas2
Integration with NOx removes, while reducing the operating cost of equipment investment and flue gas purification system entirety, in cement industry denitration
On have a good application prospect.
(2) system uses circulating fluid bed semi-drying method desulfurization, and in recirculating fluidized bed, the surface of absorbent granules is being touched
It is constantly updated during hitting, also substantially increases the utilization rate of absorbent.The technology has technology maturation, system can
It leans on, process flow is simple, water consumption is few, occupied area is small, one-time investment expense is low, desulfurization product is in dry state, no waste water row
It puts, the advantages that generation without secondary pollution.
(3) compared to SCR/SNCR denitrating flue gas+semi-dry desulphurization technology, which uses oxidizing process+semi-dry desulphurization
Technology is capable of forming coupling between oxidation and denitration and semi-dry desulphurization, SO in the technical application2It can promote the removal of NOx,
NOx can also promote SO2Removing, the two is mutually promoted, and improves the structure of desulfurization product layer densification, increase absorbent with
The contact area of gas, while also improving the efficiency of desulphurization denitration；And ozone is used to nor affect on other dirts as oxidant
Contaminate object control technology.SO can not only be improved2With the removal efficiency of NOx, while can also pass through the strong oxidizing property of ozone effect will
Desulfurizing byproduct calcium sulfite is converted to calcium sulfate, and calcium sulfate has certain economic value, can carry out aerated-block, premixing
The resource utilizations such as mortar, slag micropowder.
(4) bag filter that the system uses not only is able to achieve dedusting with respect to cyclone separator and the separation of Desulphurization follows
Ring, and wear problem is not present, while handling exhaust gas volumn and will not be restricted；And bag filter can be directly using original
Kiln tail bag filter is particularly suitable for cement kiln flue gas managing transformation project, can utilize original device and by-product well
Object, to reduce investment cost.
(5) feed inlet on the absorption tower CFB is set to below venturi section, absorbent enters literary mound together with flue gas and accelerates
Enter the direct tube section of tower afterwards, Flow Field Distribution is more evenly.
(7) system be based on semi-dry process, whole process absorbent and desulfurization product are in dry state, avoid SNCR and
Absorbent is that slurries have corrosion and scaling blocking, wastewater treatment in SCR.
Detailed description of the invention
Fig. 1 is the schematic diagram 1 disclosed in embodiment for the flue gas system of the ultra-clean processing of cement kiln tail gas；
Fig. 2 is the schematic diagram 2 disclosed in embodiment for the flue gas system of the ultra-clean processing of cement kiln tail gas；
Fig. 3 is that cement kiln end dedusting ash recycling prepares desulfurization absorbent schematic diagram；
Appended drawing reference: 1- oxidation and denitration reactor；The absorption tower 2-CFB；3- bag filter；4- chimney；5- air flume；
6- quick lime storehouse；7- Dry slaker；8- cyclone separator；9- surge bunker；10- intermediate bin；11- niter ash cellar；12- process water
Case；13- water pump；14- desulfuring spray gun；15- digests spray gun；The storehouse 16- pump；17- ash silo；18- low NO；19- kiln tail cloth
Bag dust collector；The original grey library 20-.
Specific embodiment
It is described further now in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that attached drawing is simplified
Schematic diagram illustrates the basic structure of this patent in a schematic manner, therefore it only shows structure related with the utility model patent
At.
As shown in Figure 1, disclosing a kind of flue gas system for the ultra-clean processing of cement kiln tail gas in embodiment, including oxidation is de-
Nitre reactor 1, the absorption tower CFB 2, bag filter 3, chimney 4, technique water system, absorbent preparation and supply system and de-
Sulphur ash circulation and transportation system.(i.e. setting exports the entrance and kiln tail bag filter 19 of oxidation and denitration reactor 1 in cement kiln
Original bag filter at place) outlet be connected, outlet and the air inlet on the absorption tower CFB 2 of oxidation and denitration reactor 1 pass through cigarette
Road is connected, and the gas outlet on the absorption tower CFB 2 is connected by flue with the air inlet of bag filter 3, the outlet of bag filter 3
Mouth is connected by flue with chimney 4.
Wherein, ozone, H can be used in the oxidant of oxidation and denitration reactor 12O2、NaClO、NaClO2And KMnO4Deng.
Wherein, the calcium agent such as calcium hydroxide, quick lime and carbide slag can be used in the absorbent on the absorption tower CFB 2.Flow Field Distribution is shadow
The key factor that recirculating fluidized bed builds bed and desulfuration efficiency is rung, the feed inlet on the absorption tower CFB is arranged the utility model
In the lower section of venturi, absorbent is set to enter the direct tube section for entering tower after literary mound accelerates together with flue gas, Flow Field Distribution is more evenly.
Wherein, the attached bag filter in bag filter 3, i.e. semi-dry desulphurization can create or directly utilize original kiln tail
Bag filter 19 (as shown in Fig. 2, the mobile system corresponding position of bag filter that kiln tail will be originally arranged at), or adopt
Use electric precipitator.In embodiment, rotary blowing deashing is can be used in the attached bag filter of semi-dry desulphurization, sprays deashing compared to boat,
Its space utilization rate is higher, and the service life is longer for filter bag, and the quantity of pulse valve is less, fault point is few, the service life is longer.Cloth
The main component for the Desulphurization that bag dust collector 3 generates is calcium sulfate, calcium sulfite, calcium nitrate and calcium nitrite etc..Desulphurization portion
It point can be used for the absorption tower CFB 2 and establish bed, part outlet utilizes.This also illustrates that the technical program is particularly suitable for cement kiln cigarette
Gas rebuilding and improving project can utilize original device and by-product, to reduce investment cost well.
Wherein, technique water system includes technique water tank 12, water pump 13, desulfuring spray gun 14 and digestion spray gun 15, two water pumps
13 entrance is connected with technique water tank 12, and outlet is connected with desulfuring spray gun 14 and digestion spray gun 15 respectively, desulfuring spray gun 14 and CFB
Absorption tower 3 is connected, and digestion spray gun 15 is connected with Dry slaker 7.Preferably, cone of the desulfuring spray gun 14 perpendicular to the absorption tower CFB 2
Duan Tabi installation, compared to setting is parallel to the horizontal plane, this mode that is vertically arranged makes the range of the water sprayed covering more
Greatly, it is contacted with the absorbent granules in the absorption tower CFB 2 more comprehensively, the more abundant of reaction is further, and direct injection high pressure can be used
Flow back spray gun, and atomizing effect is preferable.
Wherein, absorbent preparation and supply system include quick lime storehouse 6, Dry slaker 7, cyclone separator 8, surge bunker
9, intermediate bin 10 and niter ash cellar 11, the quick lime feed inlet of Dry slaker 7 are connected with the discharge port in quick lime storehouse 6, whirlwind
The entrance of separator 8 is connected with the discharge port of Dry slaker 7, and the outlet of cyclone separator 8 is connected with the entrance of surge bunker 9,
Two outlets of surge bunker 9 are connected with the return port of the entrance of intermediate bin 10 and Dry slaker 7 respectively, the outlet of intermediate bin 10
It is connected with the entrance of niter ash cellar 11, the outlet of niter ash cellar 11 is connected with the feed inlet on the absorption tower CFB 2.Preferably, dry type disappears
Change device 7 and uses fluidized-bed process, preferred empty tower structure, compared to commonly adding water digestion principle using Double shaft stirring in industry
Three-level digester, structure is simpler, and construction investment and operating cost are low, and proves disappearing for its preparation through practical engineering application
Lime quality is also higher, and application effect is preferable in semi-dry desulphurization engineering.Certainly, intermediate bin 7 can also save here, will delay
Storehouse 9 is rushed to be directly connected to niter ash cellar 11, because, absorbent storage warehouse of the intermediate bin 7 as digestive system itself, effect
It can directly be substituted by niter ash cellar 11.
Wherein, Desulphurization circulation and transportation system include air flume 5 and storehouse pump 16, the entrance and cloth bag of air flume 5
The ash bucket of deduster 3 is connected, and the outlet of air flume 5 is connected with the return port on the absorption tower CFB 2, the entrance and cloth bag of storehouse pump 16
The ash bucket of deduster 3 is connected, and the outlet of storehouse pump 16 is connected with the entrance of ash silo 17.
It can be seen that the utility model is provided with oxidation and denitration reactor 1 after kiln tail bag filter 19, by smelly
Oxygen, H2O2, the oxidants such as NaClO the NO that water is insoluble in flue gas is oxidized to the NO of high-valence state2、N2O3、N2O5Equal nitrogen
Oxide, and generation HNO soluble easily in water2And HNO3, so as to the SO with the later period2It is absorbed simultaneously, realizes simultaneous SO_2 and NO removal
Purpose.Key reaction is as follows:
NO+O3→NO2+O2,
NO2+O3→NO3+O2,
NO3+NO2→N2O5。
It should be noted that oxidation and denitration reactor 1 described in the utility model is saying for a general overview in fact
Method comprising ozone generator and distribution device, ozone generator are connected to the gas approach on the absorption tower CFB 2, distribution device cloth
It sets in the gas approach of the absorption tower CFB.Ozone generator generates ozone, then passes through the gas distribution on the gas approach of the absorption tower CFB
Ozone is sprayed into flue and is mixed with flue gas by system, realizes the oxidation reaction of ozone and NOx.
The absorption tower CFB 2, the desulfuring spray gun 14 of the cone section setting on the absorption tower CFB 2 is arranged in the rear end of oxidation and denitration reactor 1
It sprays water into the absorption tower CFB 2, the nitrogen oxides and SO of high-valence state in flue gas2It is only absorbed by the water, generates HNO2、HNO3、H2SO3、
H2SO4, above-mentioned substance absorbs by the absorbent (mainly use calcium hydroxide) in the absorption tower CFB 2 together again, generates Ca (NO3)2、Ca
(NO2)2、CaSO4And CaSO3Equal substances, play the role of simultaneous SO_2 and NO removal.
It should be noted that in the technical application, SO2Removal also mutually promote with both removings of NOx, mechanism is such as
Under:
2NO2+CaSO3→Ca(NO2)2+CaSO4
The presence of calcium sulfite increases a denitration approach, promotes denitration efficiency raising, NO2It is de- to consume part
Sulphur product promotes desulphurization reaction forward direction to carry out.Since nitrate itself can not promote SO2Removing is improved by above-mentioned reaction
The structure of desulfurization product layer densification, increases the contact area of absorbent and gas, while also improving the effect of desulphurization denitration
Rate.
Further, flue gas enters bag filter 3 behind the absorption tower CFB 2, and the particulate matter in separating flue passes through
Neat stress after bag filter 3 separates is discharged through chimney 4, removes the Desulphurization a part got off and is returned by air flume 5
The absorption tower CFB 2, for the foundation of the inner circulation fluidized bed in absorption tower, another part is delivered to ash silo 17 by storehouse pump 16, to
It recycles.
For calcium hydroxide, calcium hydroxide is prepared the absorbent used in the smoke processing system by quick lime, quick lime storage
It is stored in quick lime storehouse 6, quick lime storehouse 6 is connected with Dry slaker 7, and the preparation of calcium hydroxide is by digesting spray gun 15 to dry slaking
Quicklime slaking is generated calcium hydroxide by water spray in device 7, and the calcium hydroxide of generation successively passes through cyclone separator 8, surge bunker 9, centre
Storehouse 10 is finally stored in niter ash cellar 11.
Process water in the smoke processing system is that the water in technique water tank 12 is squeezed into desulfurization spray respectively by water pump 13
Rifle 14 and digestion spray gun 15, to meet the needs of pollutant removing and calcium hydroxide preparation.The desulfurization that bag filter 3 removes
Grey a part enters air flume 5, is sent into the foundation that the absorption tower CFB 2 participates in ciculation fluidized bed by air flume 5, simultaneously
Material is constantly updated in collision process by constantly circulation, the surface of absorbent granules, also substantially increases absorption
The utilization rate of agent；Another part Desulphurization is delivered to ash silo 17 to later use by storehouse pump 16, and main utilization ways have
Micro- slag of aerated-block, premixing mortar, miberal powder etc..
The utility model also provides another preferred embodiment, i.e., first carries out low nitrogen burning before flue gas enters this system and change
It makes to reduce NO in kiln exit gasXInitial concentration to cut operating costs.One can specifically be increased at the kiln tail of cement kiln
Low NO 18, to reduce NOxConcentration, to make NO in this system inlet flue gasxConcentration compare no low nitrogen burning
Can be low before transformation, then the ozone consumed required for ozone oxidation will be reduced, further decrease overall cost of operation.It should
System can carry out low nitrogen burning transformation to cement kiln reduces NO in kiln exit gasXInitial concentration to cut operating costs.
Further, since CaO content is high in the dust that kiln tail bag filter 19 is collected, therefore it is raw on the one hand to can be used for cement
The preheating for producing raw material, on the other hand can also be used in the preparation (as shown in connection with fig. 3) of absorbent in the absorption tower CFB 2.
Smoke processing system provided by the utility model can adapt to cement furnace flue gas, effectively remove dust, NOx and
SO2Equal Air Pollutants, and can satisfy minimum discharge requirement, dust emission concentration≤5mg/Nm3, NOx emission concentration
≤35mg/Nm3, SO2Concentration of emission≤50mg/Nm3。
Finally, it should be noted that the foregoing is merely the utility model to be described in detail, for the skill of this field
For art personnel, the preferred embodiment of aforementioned utility model can be still not intended to limit the utility model, to the greatest extent
Pipe with reference to the foregoing embodiments modifies to technical solution documented by each embodiment, or carries out to part of technical characteristic
Equivalent replacement.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all wrap
Containing being within the protection scope of the utility model.
Claims (9)
1. a kind of flue gas system for the ultra-clean processing of cement kiln tail gas, which is characterized in that including sequentially connected oxidation and denitration
Reactor, the absorption tower CFB, deduster and chimney；Wherein, the absorption tower CFB has the venturi section arranged from bottom to top, cone
Section and direct tube section, and configure air inlet, feed inlet, gas outlet and return port；The deduster is bag filter or electric precipitation
Device；
The entrance of the oxidation and denitration reactor is connected by flue and the outlet of kiln tail bag filter, the oxidation and denitration reaction
The outlet of device is connect by flue with the air inlet on the absorption tower CFB, and the gas outlet on the absorption tower CFB passes through flue and institute
The air inlet connection of deduster is stated, the gas outlet of the deduster is connect by flue with the chimney.
2. the flue gas system of the ultra-clean processing of cement kiln tail gas according to claim 1, which is characterized in that further include process water
System, the technique water system include technique water tank, the first water pump, desulfuring spray gun, the technique water tank by the first water pump and
Desulfuring spray gun is connect with the absorption tower CFB.
3. the flue gas system of the ultra-clean processing of cement kiln tail gas according to claim 2, which is characterized in that the desulfuring spray gun
Perpendicular to the cone section tower wall installation on the absorption tower CFB.
4. the flue gas system of the ultra-clean processing of cement kiln tail gas according to claim 1, which is characterized in that further include absorbent
Preparation and supply system, the absorbent preparation and supply system include quick lime storehouse, Dry slaker, cyclone separator, delay
Rush storehouse and niter ash cellar；The feed inlet of the Dry slaker is connected with the discharge port in quick lime storehouse, the cyclone separator
Entrance is connected with the discharge port of Dry slaker, and the outlet of the cyclone separator is connected with the entrance of surge bunker, the buffering
Two outlets in storehouse are connected with the return port of the entrance of niter ash cellar and Dry slaker respectively, the outlet of the niter ash cellar with
The feed inlet on the absorption tower CFB is connected.
5. the flue gas system of the ultra-clean processing of cement kiln tail gas according to claim 4, which is characterized in that the absorption tower CFB
Feed inlet is set to below venturi section.
6. the flue gas system of the ultra-clean processing of cement kiln tail gas according to claim 4, which is characterized in that further include process water
System, the technique water system include technique water tank, the second water pump and digestion spray gun, the technique water tank by the second water pump and
Digestion spray gun is connect with the Dry slaker.
7. the flue gas system of the ultra-clean processing of cement kiln tail gas according to claim 4, which is characterized in that the dry slaking
Device uses fluidized-bed process.
8. the flue gas system of the ultra-clean processing of cement kiln tail gas according to claim 4, which is characterized in that the dry slaking
Device is empty tower structure.
9. the flue gas system of the ultra-clean processing of cement kiln tail gas according to claim 1, which is characterized in that further include Desulphurization
Circulation and transportation system, the Desulphurization circulation include that air flume and storehouse pump with transportation system；One end of the air flume
It is connect with the ash bucket of the deduster, the other end is connect with the return port on the absorption tower CFB；The entrance of storehouse pump with it is described
The ash bucket of deduster connects, and the outlet of the storehouse pump is connect with the entrance of external ash silo.
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| CN111085090A (en) * | 2020-02-12 | 2020-05-01 | 福建龙净脱硫脱硝工程有限公司 | Purification system for tail flue gas of cement kiln |
| CN111135686A (en) * | 2020-01-14 | 2020-05-12 | 张德生 | Semi-dry flue gas desulfurization device and desulfurization method |
| CN111544971A (en) * | 2020-04-30 | 2020-08-18 | 南京赤博环保科技有限公司 | Gas low-nitrogen low-dust combustion purification method and system |
| CN112807873A (en) * | 2020-12-22 | 2021-05-18 | 佛山市伊清环保工程技术有限公司 | Kiln flue gas multi-pollutant cooperative treatment complete equipment |
| CN113019092A (en) * | 2021-02-06 | 2021-06-25 | 唐山钢铁集团有限责任公司 | Flue gas desulfurization and denitrification method and system based on dense-phase semi-dry method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111135686A (en) * | 2020-01-14 | 2020-05-12 | 张德生 | Semi-dry flue gas desulfurization device and desulfurization method |
| CN111085090A (en) * | 2020-02-12 | 2020-05-01 | 福建龙净脱硫脱硝工程有限公司 | Purification system for tail flue gas of cement kiln |
| CN111544971A (en) * | 2020-04-30 | 2020-08-18 | 南京赤博环保科技有限公司 | Gas low-nitrogen low-dust combustion purification method and system |
| CN112807873A (en) * | 2020-12-22 | 2021-05-18 | 佛山市伊清环保工程技术有限公司 | Kiln flue gas multi-pollutant cooperative treatment complete equipment |
| CN113019092A (en) * | 2021-02-06 | 2021-06-25 | 唐山钢铁集团有限责任公司 | Flue gas desulfurization and denitrification method and system based on dense-phase semi-dry method |
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