CN206138996U - Novel cement kiln semi -dry desulfurization system - Google Patents

Novel cement kiln semi -dry desulfurization system Download PDF

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Publication number
CN206138996U
CN206138996U CN201621063154.6U CN201621063154U CN206138996U CN 206138996 U CN206138996 U CN 206138996U CN 201621063154 U CN201621063154 U CN 201621063154U CN 206138996 U CN206138996 U CN 206138996U
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cement kiln
semi
raw
lime slurry
pipeline
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CN201621063154.6U
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郭彦鹏
曹培
俞刚
马卓然
杨东方
沈洁
关凌岳
孙鹤
白鹤
杜飞
杨学权
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SINOMA INTERNATIONAL ENVIRONMENT ENGINEERING (BEIJING) Co Ltd
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SINOMA INTERNATIONAL ENVIRONMENT ENGINEERING (BEIJING) Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The utility model provides a novel cement kiln semi -dry desulfurization system, include vertical range in proper order and a cement kiln whirlwind section of thick bamboo and no. Two cement kiln whirlwind section of thick bamboos of being in the same place through the pipe connection, the bottom of no. Two cement kiln whirlwind section of thick bamboos is provided with the unloading pipe, unloading pipe lower part has connected gradually the raw material storehouse through the pipeline, lime slurry wet -type digestion tank, and the lime slurry storage tank, slaked lime water atomization injection system, slaked lime water atomization injection system's end sets up in the pre -heater on a cement kiln whirlwind section of thick bamboo upper portion through the pipe connection. This patent a novel cement kiln semi -dry desulfurization system, can realize the desulfurization efficiency more than 70%, this law belongs to the semi -dry desulfurization technique, combined moreover dry reaction agent spouting method and spray drying desulfurization the technique the advantage to its shortcoming has been overcome, other pollutions can be do not not caused. Simultaneously, the reactant derives from hot raw material, has reduced traditional desulfurization process's investment cost and running cost.

Description

A kind of new type water stall semi-dry desulphurization system
Technical field
This utility model is related to a kind of desulphurization system, especially the new type water stall semidry method of a kind of low cost, efficiency high Desulphurization system.
Background technology
In the last few years, with country emission of industrial pollutants is required it is increasingly stricter, domestic key industrial enterprise Atmosphere pollution includes SO2, NOx etc. discharge incorporate emphasis Contents for Monitoring, exhausting control enters normalization.In this back of the body Under scape, development of the traditional industry such as iron and steel, electric power through decades, the supporting flue gas desulfurization technique that have developed maturation.
Relative to these enterprises, the desulfurization technology of cement industry particularly new type nonaqueous cement production line then develops more to be delayed Slowly, on the one hand it is that inside just becomes a natural desulfurizer, can suppress big as cement kiln is in natural alkalescence Partial fuel sulphur emissions, while sulfur zero-emission can be reached substantially when raw mill is opened, so as to most dry method kiln not Desulfurizer is needed, another aspect is then the relatively less strict of the sulphur emissions state control with regard to cement kiln.But from The national regulation GB4915-2014 of enforcement from 1 day March in 2014《Cement industry atmosphere pollutants emission standardses》To cement kiln SO2Control has higher requirement, existing enterprise SO2Discharge is less than 200mg/Nm3, key area is less than 100mg/Nm3。 And when the sulfur content in cement baking raw material is higher, kiln tail chimney SO2Discharge then occurs exceeded situation, reaches as high as 800mg/Nm3More than, even open raw mill and also be difficult to make kiln tail chimney SO2Emission compliance;Therefore exploitation can reduce dry method The desulfurization technology of cement kiln is for cement industry environmental protection important in inhibiting.
The desulfurization technology of common main flow is mainly wet desulphurization, is mainly used in the industries such as iron and steel, electric power, technology more into It is ripe, but Wet technique includes that limestone-gypsum method and cost of investment of ammonia process generally existing are higher, system complex, operation Costly shortcoming, is relatively difficult to be applied on cement producing line, with one somehow cement producing line of the yield as 5000t/d As a example by, the supporting Limestone-gypsum Wet Flue Gas Desulfurization Process system investments volume of construction is more than 10,000,000.Current cement industry production capacity mistake Surplus, profit declines, the cost of investment of wet desulphurization for cement plant some be difficult to bear.
The desulfurization technology for being applied to cement industry at present includes dry reactant insufflation, spray dry desulfurization method, hot raw material There is certain limitation in insufflation etc., these technologies.
1.1 dry reactant insufflations
The method is that the appropriate location that Calx sprays into pre-heating system is carried out the technology of desulfurization, RMC Pacific companies Dry Calx feeding connecting pipe above between two stage cyclone cylinder is imitated with the exhaust piping after top preheater, desulfurization is gone out Rate can be between 55%~65%, can reaching 80% desulfuration efficiency when Calx is sprayed into raw mill, but raw mill stops mill When then it cannot be guaranteed that efficiency.As the technology belongs to desulfurization by dry method, dry Calx is poor with flue gas mixed effect, desulfurization It is less efficient, and in order to the consumption for ensureing desulfuration efficiency reactant is larger, operating cost is higher, and do in the technology ripe Calx needs outsourcing, generates higher operating cost.
1.2 hot raw material insufflations
The method is that the decomposed material more containing CaO fed preheater suitable position again, Fuller companies from Decomposition furnace outlet is drawn a part of waste gas and enters cyclone dust extractor, then will collect lower dust feed above two stage cyclone cylinder it Between pipeline, in hot raw material include substantial amounts of active CaO, calcium sulfur ratio be 5~6 in the case of, 25%~30% can be reached Desulfuration efficiency.The method equally exists that hot raw material input amount is higher, and desulfuration efficiency is low, the problem that construction cost is high.
1.3 spray dry desulfurization
The method is that absorption tower is sprayed into after lime slaking, and Ye You companies are substituted using conditioning Tower, and desulfuration efficiency can reach 50%~90%, Carnis Rapanae thomasianae cement plant adopts the technology, and lime slaking liquid is sprayed into conditioning Tower, is 20% or so in concentration of slurry And whitewashing amount is 15m3During/h, SO2Concentration is by 450mg/Nm3Drop to 150mg/Nm3, efficiency reaches 60%.Before comparing Several sulfur removal technologies method efficiency is higher, but still can not meet high SO2Requirement during concentration of emission to desulfuration efficiency, and Calx in the method comes from dore furnace, and whole system is complex.Ammonia is sprayed into conditioning Tower by Ye You companies in addition, but is imitated Rate is than relatively low, and there is certain corrosion to system, and the escaping of ammonia is higher.
Several technology desulfuration efficiencies above are relatively low, in reply high concentration SO2Effect on driving birds is not good during discharge value, discharge value reach To or more than 800mg/Nm3Qualified discharge will be difficult to afterwards, while also have higher operating cost, therefore we need exploitation Efficient cement kiln desulfurization technology.
Utility model content
To solve the above problems, this utility model provides a kind of low cost, the new type water stall semidry method of efficiency high takes off Sulfur system.
The good new type water stall semi-dry desulphurization system of a kind of low cost of this utility model purpose, desulfurized effect is realized, It is including being vertically arranged in order and a cement kiln cyclone cylinder being linked together by pipeline and No. two cement kiln cyclone cylinders, described The bottom of No. two cement kiln cyclone cylinders is provided with tremie pipe, and the tremie pipe bottom is connected with raw material silo, stone in turn by pipeline Grey serosity WET DIGESTION pond, lime slurry storage tank, slaked lime water atomization spraying system, the slaked lime water atomization spraying system End is connected in the preheater on a cement kiln cyclone cylinder top by pipeline.
Air pump is provided with pipeline between the tremie pipe and raw material silo.
The top of the raw material silo is provided with dust-precipitator, and the bottom side of the raw material silo is connected with compressed air injection Pipe, is provided with spiral electric dispenser on the pipeline between the raw material silo and lime slurry WET DIGESTION pond.
The bottom in the lime slurry WET DIGESTION pond is connected with a blowoff basin, the lime slurry WET DIGESTION pond with A flusher is provided with pipeline between lime slurry storage tank.
The bottom of the lime slurry storage tank is connected with No. two blowoff basins, the lime slurry storage tank and slaked lime water atomization No. two flushers, effusion meter and pressure transmitters are provided with pipeline between spraying system.
Tap water injection water pipe is additionally provided with the top of the lime slurry WET DIGESTION pond, the tap water injects water pipe On be disposed with electrically operated valve and water yield effusion meter.
A kind of new type water stall semi-dry desulphurization system described in this patent, first passes through air pump by No. two cement kiln cyclone cylinders In hot raw material Jing tremie pipes be delivered to raw material silo, then by compressed air ascending pipe to injecting compressed air in raw material silo, Dust in hot raw material is blown afloat to float which, then dust is siphoned away by the dust-precipitator at the top of raw material silo, after dedusting Hot raw material Jing spiral electrics dispenser in raw material silo sends into lime slurry WET DIGESTION pond, and Jing tap waters inject water pipe to Calx Water filling in serosity WET DIGESTION pond, and digestion operation is carried out, waste water enters a blowoff basin of bottom.Postdigestive hot raw material Jing A number flusher sends into lime slurry storage tank after rinsing, and the Sal Nitri buck of 10%~25% concentration, lime white are formed after reaction The waste water of liquid storage tank bottom precipitation enters No. two blowoff basins, and Sal Nitri buck sends into Sal Nitri buck after No. two flushers are rinsed Atomization spray system, and Sal Nitri buck is sprayed into into a cement kiln cyclone cylinder top by slaked lime water atomization spraying system finally In preheater, it is 350 DEG C~800 DEG C that injection temperation is interval.Desulfurization product finally enters a cement kiln cyclone cylinder by preheater It is interior.
A kind of new type water stall semi-dry desulphurization system described in this patent, can realize more than 70% desulfuration efficiency, This law belongs to semi-dry desulphurization technology, and combines the advantage of dry reactant insufflation and spray dry desulfurization technology, and gram Its shortcoming has been taken, other pollutions have not been resulted in.Meanwhile, reactant derives from hot raw material, reduces the investment of traditional sulfur removal technology Cost and operating cost.
Description of the drawings
Fig. 1 is a kind of structural representation of new type water stall semi-dry desulphurization system of the present utility model.
Specific embodiment
As shown in figure 1, a kind of new type water stall semi-dry desulphurization system of the present utility model, including being vertically arranged in order simultaneously The cement kiln cyclone cylinder 22 linked together by pipeline and No. two cement kiln cyclone cylinders 1, No. two cement kiln whirlwind The bottom of cylinder 1 is provided with tremie pipe 2, and 2 bottom of the tremie pipe is connected with raw material silo 4, lime slurry wet type in turn by pipeline 9 Digester 5, lime slurry storage tank 6, slaked lime water atomization spraying system 7, the end of the slaked lime water atomization spraying system 7 lead to Piping 9 is connected in the preheater 21 on 22 top of cement kiln cyclone cylinder.
Air pump 3 is provided with pipeline 9 between the tremie pipe 2 and raw material silo 4.
The top of the raw material silo 4 is provided with dust-precipitator 8, and the bottom side of the raw material silo 4 is connected with compressed air note Enter pipe 10, on the pipeline 9 between the raw material silo 4 and lime slurry WET DIGESTION pond 5, be provided with spiral electric dispenser 11.
The bottom in the lime slurry WET DIGESTION pond 5 is connected with a blowoff basin 15, the lime slurry WET DIGESTION A flusher 16 is provided with pipeline 9 between pond 5 and lime slurry storage tank 6.
The bottom of the lime slurry storage tank 6 is connected with No. two blowoff basins 17, the lime slurry storage tank 6 and Sal Nitri buck No. two flushers 18, effusion meter 19 and pressure transmitter 20 are provided with pipeline 9 between atomization spray system 7.
The top in the lime slurry WET DIGESTION pond 5 is additionally provided with tap water injection water pipe 12, the tap water injection Electrically operated valve 13 and water yield effusion meter 14 are disposed with water pipe 12.
A kind of new type water stall semi-dry desulphurization system described in this patent, first passes through air pump 3 by No. two cement kiln whirlwind Hot raw material Jing tremie pipes 2 in cylinder 1 are delivered to raw material silo 4, and pressure is injected into raw material silo 4 by compressed air ascending pipe 10 then Contracting air, the dust in hot raw material is blown afloat to float which, is then siphoned away dust by the dust-precipitator 8 at the top of raw material silo 4, Hot raw material Jing spiral electrics dispenser 11 in raw material silo 4 after dedusting sends into lime slurry WET DIGESTION pond 5, Jing tap waters note Oral siphon 12 is to water filling in lime slurry WET DIGESTION pond 5, and carries out digestion operation, and waste water enters a blowoff basin of bottom 15.Postdigestive hot raw material send into lime slurry storage tank 6 Jing after a flusher 16 is rinsed, and 10%~25% is formed after reaction The Sal Nitri buck of concentration, the waste water of 6 bottom precipitation of lime slurry storage tank enter No. two blowoff basins 17, and Sal Nitri buck is rushed through No. two Cleaning device 18 sends into slaked lime water atomization spraying system 7 after rinsing, and it is final by slaked lime water atomization spraying system 7 by slaked lime Water is sprayed in the preheater 21 on 22 top of cement kiln cyclone cylinder, and it is 350 DEG C~800 DEG C that injection temperation is interval.Desulfurization product It is final to be entered in a cement kiln cyclone cylinder 22 by preheater 21.
Embodiment described above is only that preferred implementation of the present utility model is described, not to this practicality New scope is defined, under the premise of without departing from this utility model design spirit, this area ordinary skill technical staff couple Various modifications and improvement that technical solutions of the utility model are made, all should fall into the guarantor that claims of the present utility model determine In the range of shield.

Claims (7)

1. a kind of new type water stall semi-dry desulphurization system, including No. being vertically arranged in order and being linked together by pipeline Cement kiln cyclone cylinder and No. two cement kiln cyclone cylinders, it is characterised in that the bottom of No. two cement kiln cyclone cylinders is provided with down Expects pipe, the tremie pipe bottom are connected with raw material silo in turn by pipeline, lime slurry WET DIGESTION pond, lime slurry storage tank, Slaked lime water atomization spraying system, the end of the slaked lime water atomization spraying system are connected in a cement by pipeline The preheater on kiln cyclone cylinder top.
2. a kind of new type water stall semi-dry desulphurization system according to claim 1, it is characterised in that the tremie pipe with Air pump is provided with pipeline between raw material silo.
3. a kind of new type water stall semi-dry desulphurization system according to claim 1, it is characterised in that the raw material silo Top is provided with dust-precipitator, and the bottom side of the raw material silo is connected with compressed air ascending pipe, the raw material silo and lime white Spiral electric dispenser is provided with pipeline between liquid WET DIGESTION pond.
4. a kind of new type water stall semi-dry desulphurization system according to claim 1, it is characterised in that the lime slurry The bottom in WET DIGESTION pond is connected with a blowoff basin, the pipe between the lime slurry WET DIGESTION pond and lime slurry storage tank A flusher is provided with road.
5. a kind of new type water stall semi-dry desulphurization system according to claim 1, it is characterised in that the lime slurry The bottom of storage tank is connected with No. two blowoff basins, on the pipeline between the lime slurry storage tank and slaked lime water atomization spraying system It is provided with No. two flushers, effusion meter and pressure transmitters.
6. a kind of new type water stall semi-dry desulphurization system according to claim 1, it is characterised in that the lime slurry Tap water injection water pipe is additionally provided with the top of WET DIGESTION pond, on the tap water injection water pipe, electrically operated valve is disposed with With water yield effusion meter.
7. a kind of new type water stall semi-dry desulphurization system according to claim 1, it is characterised in that the Sal Nitri buck Sal Nitri buck is sprayed in the preheater on cement kiln top by atomization spray system, and it is 350 DEG C~800 DEG C that injection temperation is interval.
CN201621063154.6U 2016-09-19 2016-09-19 Novel cement kiln semi -dry desulfurization system Active CN206138996U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020164259A1 (en) * 2019-02-11 2020-08-20 江苏中圣园科技股份有限公司 Rotary lime kiln preheater with efficient flue gas desulfurization

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020164259A1 (en) * 2019-02-11 2020-08-20 江苏中圣园科技股份有限公司 Rotary lime kiln preheater with efficient flue gas desulfurization

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