CN206474002U - A kind of flue gas purification system for new type nonaqueous cement stove kiln tail - Google Patents

A kind of flue gas purification system for new type nonaqueous cement stove kiln tail Download PDF

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Publication number
CN206474002U
CN206474002U CN201621242724.8U CN201621242724U CN206474002U CN 206474002 U CN206474002 U CN 206474002U CN 201621242724 U CN201621242724 U CN 201621242724U CN 206474002 U CN206474002 U CN 206474002U
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flue gas
outlet
entrance
accessory substance
new type
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陈文瑞
王婉贞
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Fujian Longking Co Ltd.
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Fujian Longking 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
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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 kind of flue gas purification system for new type nonaqueous cement stove kiln tail, including the cooling of new type nonaqueous cement stove production line, flue system, flue gas and reheat system, electric cleaner, oxidation and denitration reactor, flue gas washing and accessory substance generation system and chimney;The flue system includes raw material bucket;The flue gas cooling and reheat system include gas cooler, smoke re-heater and water lines;Flue gas washing and accessory substance the generation system includes scrubbing tower, eddy flow dehydrator and accessory substance drying device.The flue gas purification system for new type nonaqueous cement stove kiln tail that the utility model is provided, fume afterheat can be made full use of, dust, nitrogen oxides, the oxysulfide in flue gas can effectively be removed, and the white plume of chimney is effectively removed, reach laws and regulations requirement of the country to flue gas pollutant minimum discharge.

Description

A kind of flue gas purification system for new type nonaqueous cement stove kiln tail
Technical field
The utility model is related to tail gas clean-up field, more particularly to a kind of flue gas for new type nonaqueous cement stove kiln tail Cleaning system.
Background technology
It is increasingly strict to the pollutant emission of new type nonaqueous cement furnace flue gas with the fast development of China's economy, after combustion After coal-fired plant's atmosphere pollution minimum discharge transformation, new type nonaqueous cement furnace flue gas pollutant control will also enter ultralow The discharge epoch.Traditional kiln exit gas purification techniques can not meet the requirement of minimum discharge at all.
As shown in figure 1, Fig. 1 is existing new type nonaqueous cement stove kiln exit gas cleaning system structural representation.At present, newly Type cement produced with the dry method stove, due to high temperature combustion of fuel, produces dust, NO in revolving burner and dore furnacexAnd SOxIt is dirty etc. main air Thing is contaminated, after by five-stage whirlwind separator, flue gas is discharged by air-introduced machine.It is big absolutely at present to advocate energy-saving and emission-reduction policy Most new type nonaqueous cement stoves are after level V cyclone separator C5, there is provided waste heat boiler.Traditional new dry process water Mud stove kiln exit gas treating flour dust generally uses electric cleaner, but C5 Cyclone outlet flue-gas temperatures are up to 350 DEG C, Even if there is provided waste heat boiler, the flue-gas temperature of heat boiler outlet is also at 180~220 DEG C, and electric cleaner is transported in the condition of high temperature OK, mechanically and electrically fault rate is high, because operating mode exhaust gas volumn is greatly increased under high temperature, therefore under high-temperature condition, electric cleaner Efficiency of dust collection is very poor.How electric cleaner input gas temperature is reduced as one of key of the present utility model.
Traditional new type nonaqueous cement stove kiln exit gas NOxAdminister and generally use SNCR denitration, but SNCR denitration one Aspect denitration efficiency only has 50%, and on the other hand its reaction is restricted by temperature window, is strict with reaction temperature at 850~950 DEG C. To NOxWhen discharge is strictly limited, SNCR denitration technology can not meet requirement at all.Generally, kiln exit gas NOxOriginal concentration exists 800~1000mg/Nm3, based on SNCR removal efficiencies 50%, NO after denitrationxConcentration of emission is in 400~500mg/Nm3, and super Under low emission, NOxConcentration of emission limit value is in 50mg/Nm3, therefore conventional art can not meet minimum discharge requirement at all.In addition, The wide variety of SCR denitration in coal-burning power plant, although denitration efficiency is high, but due in new type nonaqueous cement furnace flue gas dust Containing high CaO, it is easily caused denitrating catalyst poisoning and blocks failure, thus also can not popularization and application.
In traditional new type nonaqueous cement stove kiln exit gas, because CaO content is high, most SO itself is stripped of2, Therefore SO2Content is very low, can generally meet existing discharging standards.But put into effect minimum discharge requirement in the future, such as it is right In coal-burning power plant, SO2Minimum discharge limit value in 35mg/Nm3, and generally kiln exit gas SO2Concentration of emission 100~ 200mg/Nm3, therefore minimum discharge requirement, SO can not be met2It is imperative to administer.
Utility model content
The technical problem that the utility model is solved is that a kind of flue gas for new type nonaqueous cement stove kiln tail of offer is net Change system, the cleaning system that the application is provided can have higher denitration desulfurization degree, and can eliminate the white plume of chimney.
In view of this, this application provides a kind of flue gas purification system for new type nonaqueous cement stove kiln tail, including New type nonaqueous cement stove production line, flue system, flue gas cooling and reheat system, electric cleaner, oxidation and denitration reactor, cigarette Gas washing and accessory substance generation system and chimney;
The flue system includes raw material bucket;The flue gas cooling and reheat system include gas cooler, flue gas reheat Device and water lines;Flue gas washing and accessory substance the generation system includes scrubbing tower, eddy flow dehydrator and accessory substance drying device;
The outlet of the air-introduced machine of the new type nonaqueous cement stove production line is connected with the entrance of raw material bucket;
The entrance of the exporting of the raw material bucket, the outlet of the air-introduced machine with the gas cooler is connected;
The outlet of the gas cooler is connected with the entrance of the electric cleaner, the outlet of the electric cleaner with it is described The entrance of oxidation and denitration reactor is connected, and the outlet of the oxidation and denitration reactor is connected with the entrance of scrubbing tower, the washing The outlet of top of tower is connected with the entrance of the smoke re-heater, the outlet of the smoke re-heater and the entrance phase of the chimney Even, the flue gas heater is connected with the gas cooler by water lines;
The outlet of the wash tower bottoms is connected with the entrance of the eddy flow dehydrator, the outlet of the eddy flow dehydrator with The entrance of the accessory substance drying device is connected.
It is preferred that, the entrance of the accessory substance drying device is connected with the outlet of the air-introduced machine, the accessory substance drying device Outlet be connected with the entrance of the gas cooler.
It is preferred that, demister, spraying layer and slurry pool, the slurries are disposed with inside the scrubbing tower from top to bottom Pond is connected with the spraying layer by being arranged at the circulating pump outside scrubbing tower.
It is preferred that, the entrance of the raw material bucket is provided with raw material bucket inlet baffle door, and outlet is provided with raw material bucket exit catch Plate door.
It is preferred that, the entrance of the accessory substance drying device is provided with accessory substance drying device inlet baffle door, and outlet is provided with Accessory substance drying device outlet damper door.
It is preferred that, the washing slurries of the scrubbing tower are NaOH or CaCO3
It is preferred that, the oxidant of the oxidation and denitration reactor is ozone.
This application provides a kind of flue gas purification system for new type nonaqueous cement stove kiln tail, it includes:Novel dry Method cement furnace production line, flue system, flue gas cooling and reheat system, electric cleaner, oxidation and denitration reactor, flue gas washing And accessory substance generation system and chimney;The utility model is provided with flue gas cooling and reheat system, and wherein gas cooler is placed in Before electric cleaner, the flue-gas temperature for being lowered into electric cleaner, make gas cooler input gas temperature by 180~ 220 DEG C are down to 90~120 DEG C, greatly reduce the input gas temperature and operating mode exhaust gas volumn of electric cleaner, electric cleaner dedusting Efficiency can be greatly improved, while reducing equipment failure rate;Smoke re-heater is arranged on before the after funnel of scrubbing tower, scrubbing tower Flue gas afterwards is saturation wet flue gas, and temperature is 40~50 DEG C, and the hot water from gas cooler is in smoke re-heater with satisfying Heat exchange is carried out with wet flue gas, flue-gas temperature can be heated to 80~90 DEG C, the white plume of chimney can be eliminated;Further, originally Application is provided with oxidation and denitration reactor between electric cleaner and scrubbing tower, and oxidant therein can be by being insoluble in flue gas The NO of water is oxidized to NO soluble in water2And N2O5Etc. higher nitrogen oxides, removed by subsequent wash tower, denitration efficiency Up to more than 90%;The application sets flue gas washing tower to remove the SO in flue gas2, again can be with aoxidizing out of stock reactor generation NO2And N2O5Reaction, generates NaNO3、CaSO4Deng material, thus play a part of simultaneous SO_2 and NO removal.
Further, the application is provided with by-pass flue in putting electric cleaner import flue collector in air-introduced machine outlet, can take out Take partial fume as the thermal source of desiccation accessory substance, flue gas reduces temperature after carrying out heat exchange in accessory substance drying device, drop Flue gas after temperature returns again to flue collector, so as to reduce the flue-gas temperature in flue collector.
Result of the test shows that the system that the application is provided can adapt to new type nonaqueous cement furnace flue gas and Dust Characteristics, Effectively remove chalk dust removing, NOxAnd SOxDeng Air Pollutants, and meet minimum discharge requirement, dust < 5mg/Nm3, NOx< 50mg/Nm3, SOx< 20mg/Nm3
Brief description of the drawings
Fig. 1 is that prior art is used for the flue gas purification system schematic diagram of new type nonaqueous cement stove kiln tail;
Fig. 2 is that the utility model is used for the flue gas purification system schematic diagram of new type nonaqueous cement stove kiln tail.
Embodiment
For a further understanding of the utility model, the utility model preferred embodiment is retouched with reference to embodiment State, but it is to be understood that these descriptions are simply to further illustrate feature and advantage of the present utility model, rather than to this practicality The limitation of new claim.
As shown in figure 1, Fig. 1 is the signal for the flue gas purification system that prior art is used for new type nonaqueous cement stove kiln tail Figure, wherein, 10 be new type nonaqueous cement stove production line, and 11 be rotary kiln, and 12 be dore furnace, and 13 be cyclone separator, and 14 are Waste heat boiler, 15 be air-introduced machine, and 16 make a living hopper, and 20 be flue system, and 21 make a living hopper throat baffle door, and 22 hoppers of making a living go out Mouth baffle door, 40 be electric cleaner, and 70 be chimney.
New type nonaqueous cement stove production line 10 includes rotary kiln 11, dore furnace 12, five-stage whirlwind separator 13, waste heat pot Stove 14, air-introduced machine 15 and raw material bucket 16.Fuel carries out high-temp combustion in rotary kiln 11 and dore furnace 12, and the flue gas of generation contains Dust, NOxAnd SOxDeng Air Pollutants, flue gas flows through rotary kiln 11, dore furnace 12, five-stage whirlwind separator from bottom to top 13rd, waste heat boiler 14, are discharged by air-introduced machine 15, and part heat smoke, which enters in 14 raw material buckets 16, carries out preheated raw meal.
Because the ignition temperature in rotary kiln 11 is up to 1000~1200 DEG C, the ignition temperature in dore furnace is also up to 800 ~1000 DEG C, the N in air2Burn herein and easily produce thermal NOx, therefore NOxConcentration is generally higher, up to 1000mg/ Nm3.At present, new type nonaqueous cement stove is to flue gas NOxImprovement generally use SNCR denitration, but SNCR denitration technology on the one hand Denitration efficiency is low, and only 50% or so, harsh on the other hand is required to reaction temperature window, reaction temperature must be 850~950 DEG C, stove operating mode is easy to deviate reaction temperature window once fluctuating, therefore denitration efficiency is lower, it is impossible to meet emission request.If Based on SNCR denitration efficiency 50%, in NOxOriginal concentration 1000mg/Nm3In the case of, NO after denitrationxConcentration is also up to 500mg/ Nm3, 200mg/Nm can not be met at all3Even lower emission regulation demands.And it is another wide variety of in coal-burning power plant SCR denitration, because containing high CaO in new type nonaqueous cement furnace flue gas dust, easily causes catalyst blockage to fail, because This can not also be promoted the use of.
The flue-gas temperature of level V cyclone separator C5 outlets is up to 350 DEG C, even if there is provided waste heat pot 14, cigarette after cooling Temperature degree is also up to 180~220 DEG C.As the capital equipment of dedusting, electric cleaner works at these elevated temperatures, certainly will cause machinery With electric failure, simultaneously because under high-temperature condition, the exhaust gas volumn under operating mode into electric cleaner is greatly increased, in the unit interval The exhaust gas volumn of electric cleaner processing is just more, causes ESP Efficiency undesirable.
Because containing high concentration CaO in new type nonaqueous cement furnace flue gas, itself can be with the SO in flue gasxReaction plays de- Sulphur is acted on, and current regulation is to SOxDischarge do not limit, SO in general flue gasxConcentration is in 200mg/Nm3Left and right.But in ultralow row The transformation epoch are put, this discharge is obviously unsatisfactory for requiring, the developed regions such as Beijing and Shanghai are to new type nonaqueous cement stove Flue gas SOxMake limitation, it is desirable to which its concentration of emission is less than 50mg/Nm3
Thus, the utility model embodiment discloses a kind of gas cleaning system for new type nonaqueous cement stove kiln tail System, as shown in Fig. 2 new type nonaqueous cement stove production line 10 in Fig. 2, rotary kiln 11, dore furnace 12, cyclone separator 13 is remaining Heat boiler 14, air-introduced machine 15, raw material bucket 16;
Flue system 20, raw material bucket inlet baffle door 21, raw material bucket outlet damper door 22, accessory substance drying device inlet baffle Door 23, accessory substance drying device inlet baffle door 24;
Flue gas is cooled down and reheat system 30, gas cooler 31, smoke re-heater 32, water lines 33;
Electric cleaner 40;
Oxidation and denitration reactor 50;
Flue gas washing and accessory substance generation system 60, scrubbing tower 61, circulating pump 62, spraying layer 63, demister 64, slurries row Go out pump 65, eddy flow dehydrator 66, accessory substance drying device 67;
Chimney 70.
Specifically, the outlet of the air-introduced machine 15 of the new type nonaqueous cement stove production line and the entrance phase of raw material bucket 16 Even;
The entrance of the exporting of the raw material bucket 15, the outlet of the air-introduced machine 16 with the gas cooler 31 is connected;
The outlet of the gas cooler 31 is connected with the entrance of the electric cleaner 40, the outlet of the electric cleaner 40 It is connected with the entrance of the oxidation and denitration reactor 50, the outlet of the oxidation and denitration reactor 50 and the entrance phase of scrubbing tower 61 Even, the outlet at the top of scrubbing tower 61 is connected with the entrance of the smoke re-heater 32, the outlet of the smoke re-heater 32 It is connected with the entrance of the chimney 70, the flue gas heater 32 is connected with the gas cooler 31 by water lines 33;
The outlet of the bottom of scrubbing tower 61 is connected with the entrance of the eddy flow dehydrator 66, the eddy flow dehydrator 66 Outlet is connected with the entrance of the accessory substance drying device 67.
What fuel was produced after being burnt through new type nonaqueous cement stove production line in the application contains dust, NOxAnd SOxDeng cigarette Gas is discharged through air-introduced machine, is partly into raw material bucket and is carried out preheated raw meal, it is reheating system that part of smoke, which then enters flue gas cooling, System 30, the system is using water as indirect heat exchange medium, and it includes gas cooler 31, smoke re-heater 32 and water-borne pipeline 33.The gas cooler 31 is arranged at before electric cleaner 40, for reducing the input gas temperature of electric cleaner 40, reduces electricity Deduster 31 handles air quantity, thus improves the operational efficiency of electric cleaner;The temperature of flue gas before into gas cooler 21 For 180~220 DEG C, exit gas temperature is 90~120 DEG C after cooling.Smoke re-heater 32 is arranged at after scrubbing tower 61, is used Saturation wet flue gas after heating scrubbing tower, to eliminate the white plume that chimney 70 comes out;The import flue gas of smoke re-heater 32 Temperature is 40~50 DEG C, and exit gas temperature is 80~90 DEG C.
The oxidation and denitration reactor 50 is arranged at after electric cleaner 40, and is placed in before scrubbing tower 60, its import cigarette Temperature degree is 90~115 DEG C, and the application is preferred to use ozone as denitration oxidant, and the NO that water is insoluble in flue gas is oxidized to NO soluble in water2And N2O5Etc. the nitrogen oxides of high price.
The flue gas washing and accessory substance generate system 60, including scrubbing tower 61, eddy flow dehydrator 66 and accessory substance desiccation Device 67.Preferably, the scrubbing tower is disposed with demister 64, spraying layer 63 and slurry pool 63 from top to bottom;Institute Slurry pool 63 is stated with the spraying layer 63 by being arranged at the circulating pump 62 outside scrubbing tower 61 to be connected;The wash tower bottoms It is provided with slurry discharge pump 65.Under above-mentioned facilities, the scrubbing tower 61 is countercurrent spray tower, using lime stone slurry or Sodium hydroxide slurry as desulfurizing agent, the slurries of bottom stock tank by circulating pump 62 be transported to top spraying layer 63 uniformly spray with Flue gas is reacted, the SO in removing flue gasx;Bottom stock tank will be transported to eddy flow dehydrator 66 also by slurry discharge pump 65 Separation of solid and liquid is carried out, the liquid separated extremely waste water, the Solid Conveying and Melting separated is done to accessory substance drying device 67 Change, generate satisfactory accessory substance.
Preferably, the entrance of the accessory substance drying device can also be connected with the outlet of the air-introduced machine, the pair The outlet of product drying device is connected with the entrance of the gas cooler;The accessory substance drying device 67 can extract part flue system The flue gas of system 20 is as the thermal source of desiccation accessory substance, and when accessory substance speeds up to finish work in time the work of device 67, baffle door 23 and baffle door 24 are beaten Open, partial fume enters desiccation accessory substance in accessory substance drying device 67, the flue gas after cooling, which is returned to, enters electric precipitation in flue collector Dedusting is carried out in device 40.
Herein described new type nonaqueous cement stove is that those skilled in the art enter to cement produced with the dry method stove as described in Figure 1 Capable name, the noun is a complete professional technique noun.
The utility model discloses a kind of flue gas purification system of new type nonaqueous cement stove kiln tail, including flue gas cooling and Reheat system, electric cleaner, oxidation and denitration reactor and flue gas washing and accessory substance generation system.The flue gas cooling and reheating System includes gas cooler and smoke re-heater, and gas cooler is used to reduce electric cleaner input gas temperature, reduction electricity Deduster field gas velocity, improves ESP Efficiency and stability;Smoke re-heater is wet for heating saturation after scrubbing tower Flue gas, removes the white plume of chimney;The oxidation and denitration reactor is placed in after electric cleaner, overcomes traditional SNCR and SCR Denitration is to temperature window and to the sensitiveness of dust, and denitration efficiency is up to more than 90%;Flue gas washing and the accessory substance system is adopted Countercurrent spray void tower is used, using NaOH or CaCO3Alkaline solution spray washing removes the NO in flue gasxAnd SOx.The flue gas is washed Wash and accessory substance system also includes accessory substance drying device, drying device is used as desiccation thermal source using part heat smoke.The utility model The new type nonaqueous cement stove kiln exit gas cleaning system of offer, can effectively deviate from the dust in flue gas, nitrogen oxides, sulphur and aoxidize Thing, and the white plume of chimney is effectively removed, reach laws and regulations requirement of the country to flue gas pollutant minimum discharge.What the application was provided New type nonaqueous cement stove kiln exit gas cleaning system adapts to new type nonaqueous cement furnace flue gas and Dust Characteristics, effectively removes Dust, NOxAnd SOxDeng Air Pollutants, and meet minimum discharge requirement, dust < 5mg/Nm3, NOx< 50mg/Nm3, SOx< 20mg/Nm3
For a further understanding of the utility model, the new type nonaqueous cement provided with reference to embodiment the utility model Stove kiln exit gas cleaning system is described in detail, and protection domain of the present utility model is not limited by the following examples.
Embodiment 1
A kind of new type nonaqueous cement stove kiln exit gas cleaning system, including new type nonaqueous cement stove production line 10, cigarette Road system 20, flue gas cooling and reheat system 30, electric cleaner 40, oxidation and denitration reactor 50, flue gas washing and accessory substance life Into system 60 and chimney 70;
The flue system 20 includes raw material bucket inlet baffle door 21, raw material bucket 16, raw material bucket outlet damper door 22, by-product Thing drying device inlet baffle door 23, accessory substance drying device outlet damper door 24;The flue gas cooling and reheat system 30 include cigarette Gas Cooler 31, smoke re-heater 32 and water lines 33;The flue gas washing and accessory substance generation system 60 include scrubbing tower 61, Circulating pump 62, eddy flow dehydrator 66 and accessory substance drying device 67;
The outlet of the air-introduced machine 15 of the new type nonaqueous cement stove production line 10 is connected with the entrance of raw material bucket 16;
The entrance of the exporting of the raw material bucket 16, the outlet of the air-introduced machine 15 with the gas cooler 31 is connected;
The outlet of the gas cooler 31 is connected with the entrance of the electric cleaner 40, the outlet of the electric cleaner 40 It is connected with the entrance of the oxidation and denitration reactor 50, the outlet of the oxidation and denitration reactor 50 and the entrance phase of scrubbing tower 61 Even, the outlet at the top of scrubbing tower 61 is connected with the entrance of the smoke re-heater 32, the outlet of the smoke re-heater 32 It is connected with the entrance of the chimney 70, the flue gas heater 32 is connected with the gas cooler by water lines 33;
Include demister 64, spraying layer 63 and slurry pool, wherein slurry pool inside the scrubbing tower 61 successively from top to bottom It is connected with spraying layer 63 by the circulating pump 62 outside scrubbing tower, the slurry discharge pump 65 of bottom and the eddy flow dehydrator 66 Entrance be connected, the outlet of the eddy flow dehydrator 66 is connected with the entrance of the accessory substance drying device 67;
The entrance of the accessory substance drying device 67 is connected with the outlet of the air-introduced machine 15, the accessory substance drying device 67 Outlet is connected with the entrance of gas cooler 31.
Embodiment 2
Flue gas is cooled down and reheat system 30 is used as indirect heat exchange medium, including gas cooler 31, flue gas reheat using water Device 32, water-borne pipeline 33.Gas cooler 31 is placed in before electric cleaner 40, for reducing electric cleaner import flue gas temperature Degree, reduces electric cleaner processing air quantity, thus improves electric cleaner operational efficiency, and its input gas temperature is 180~220 DEG C, Exit gas temperature is 90~120 DEG C after cooling.Smoke re-heater 32 is placed in after scrubbing tower 61, for heating scrubbing tower after Saturation wet flue gas, with eliminate chimney 70 come out white plume, its input gas temperature be 40~50 DEG C, exit gas temperature For 80~90 DEG C.
After oxidation and denitration reactor 50 is placed in the 40 of electric cleaner, before scrubbing tower 60, its input gas temperature be 90~ 115 DEG C, using ozone O3As denitration oxidant, the NO for being insoluble in water in flue gas is oxidized to NO soluble in water2And N2O5 Etc. the nitrogen oxides of high price.Removing NO is washed by subsequent wash tower 61x
Flue gas washing and accessory substance generation system 60, take off comprising scrubbing tower 61, circulating pump 62, slurry discharge pump 65, eddy flow Hydrophone 66, accessory substance drying device 67.The scrubbing tower 61 uses countercurrent spray tower, using lime stone slurry or sodium hydroxide slurry As desulfurizing agent, bottom is stock tank, and top is provided with spraying layer 63 and demister 64.The slurries of bottom stock tank are defeated by circulating pump 62 It is sent to top spraying layer 63 and uniformly sprays and is reacted with flue gas, the SO in removing flue gasx.The slurries of bottom stock tank pass through slurries Excavationg pump 65 is transported to eddy flow dehydrator 66 and carries out separation of solid and liquid, the liquid separated as waste water, the solid separated It is transported to accessory substance drying device 67 and carries out the satisfactory accessory substance of desiccation generation.
Accessory substance drying device 67 extracts the flue gas of part flue system 20 as the thermal source of desiccation accessory substance, when accessory substance is dry When changing the work of device 67, baffle door 23 and baffle door 24 are opened, and partial fume, which enters, carries out desiccation pair in accessory substance drying device 67 Product, the flue gas after cooling, which returns to enter in electric cleaner 40 in flue collector, carries out dedusting.
The explanation of above example is only intended to help and understands method of the present utility model and its core concept.It should refer to Go out, for those skilled in the art, can also be to this on the premise of the utility model principle is not departed from Utility model carries out some improvement and modification, and these are improved and modification also falls into the utility model scope of the claims It is interior.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or new using this practicality Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein The General Principle of justice can in other embodiments be realized in the case where not departing from spirit or scope of the present utility model.Cause This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein The most wide scope consistent with features of novelty.

Claims (7)

1. a kind of flue gas purification system for new type nonaqueous cement stove kiln tail, it is characterised in that including new type nonaqueous cement Stove production line, flue system, flue gas cooling and reheat system, electric cleaner, oxidation and denitration reactor, flue gas washing and by-product Thing generates system and chimney;
The flue system includes raw material bucket;Flue gas cooling and reheat system include gas cooler, smoke re-heater with Water lines;Flue gas washing and accessory substance the generation system includes scrubbing tower, eddy flow dehydrator and accessory substance drying device;
The outlet of the air-introduced machine of the new type nonaqueous cement stove production line is connected with the entrance of raw material bucket;
The entrance of the exporting of the raw material bucket, the outlet of the air-introduced machine with the gas cooler is connected;
The outlet of the gas cooler is connected with the entrance of the electric cleaner, the outlet of the electric cleaner and the oxidation The entrance of Benitration reactor is connected, and the outlet of the oxidation and denitration reactor is connected with the entrance of scrubbing tower, the scrubber overhead The outlet in portion is connected with the entrance of the smoke re-heater, and the outlet of the smoke re-heater is connected with the entrance of the chimney, The smoke re-heater is connected with the gas cooler by water lines;
The outlet of the wash tower bottoms is connected with the entrance of the eddy flow dehydrator, the outlet of the eddy flow dehydrator with it is described The entrance of accessory substance drying device is connected.
2. flue gas purification system according to claim 1, it is characterised in that the entrance of the accessory substance drying device with it is described The outlet of air-introduced machine is connected, and the outlet of the accessory substance drying device is connected with the entrance of the gas cooler.
3. flue gas purification system according to claim 1, it is characterised in that set successively from top to bottom inside the scrubbing tower It is equipped with demister, spraying layer and slurry pool, the slurry pool and the spraying layer pass through the circulating pump that is arranged at outside scrubbing tower It is connected.
4. flue gas purification system according to claim 1, it is characterised in that the entrance of the raw material bucket is provided with raw material bucket Inlet baffle door, outlet is provided with raw material bucket outlet damper door.
5. flue gas purification system according to claim 1, it is characterised in that the entrance of the accessory substance drying device is provided with Accessory substance drying device inlet baffle door, outlet is provided with accessory substance drying device outlet damper door.
6. the flue gas purification system according to claim 1 or 3, it is characterised in that the washing slurries of the scrubbing tower are NaOH or CaCO3
7. flue gas purification system according to claim 1, it is characterised in that the oxidant of the oxidation and denitration reactor is Ozone.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109384274A (en) * 2018-11-22 2019-02-26 中国科学院过程工程研究所 A kind of apparatus and method using ammonia nitrogen waste liquid and the denitration of kiln exit gas waste heat
CN111282415A (en) * 2018-12-06 2020-06-16 中国科学院过程工程研究所 Method for recycling nitric oxide in cement kiln flue gas and application

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109384274A (en) * 2018-11-22 2019-02-26 中国科学院过程工程研究所 A kind of apparatus and method using ammonia nitrogen waste liquid and the denitration of kiln exit gas waste heat
CN111282415A (en) * 2018-12-06 2020-06-16 中国科学院过程工程研究所 Method for recycling nitric oxide in cement kiln flue gas and application
CN111282415B (en) * 2018-12-06 2021-05-11 中国科学院过程工程研究所 Method for recycling nitric oxide in cement kiln flue gas and application

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