CN203899430U - System for processing incinerating gas - Google Patents

System for processing incinerating gas Download PDF

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Publication number
CN203899430U
CN203899430U CN201420297025.8U CN201420297025U CN203899430U CN 203899430 U CN203899430 U CN 203899430U CN 201420297025 U CN201420297025 U CN 201420297025U CN 203899430 U CN203899430 U CN 203899430U
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outlet
flue gas
fluidized bed
import
gas
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曹学新
胡奔流
戴伟华
邓雅清
周清
罗超
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China Nerin Engineering Co Ltd
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China Nerin Engineering Co Ltd
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Priority to CN201420297025.8U priority patent/CN203899430U/en
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Abstract

The utility model discloses a system for processing an incinerating gas. The system comprises a quench tower, a circulating fluidized bed, a bag-type dust remover, an activated carbon adding device and an alkali liquor spray scrubber, wherein the circulating fluidized bed is connected with the quench tower; the bag-type dust remover is connected with the circulating fluidized bed; the activated carbon adding device is arranged between the circulating fluidized bed and the bag-type dust remover; and the alkali liquor spray scrubber is connected with the bag-type dust remover. By using the system for processing the incinerating gas, the processed incinerating gas can achieve the contamination control standard and the pollution discharge standard associated with the state.

Description

Process the system of incineration flue gas
Technical field
The utility model relates to environmental energy field, and particularly, the utility model relates to the system of processing incineration flue gas.
Background technology
According to " consumer waste incineration processing engineering legislation ", " hazardous waste is concentrated incineration disposal engineering construction technical requirement (trying) ", incineration flue gas of household garbage treatment process is generally semidry method, dry method, wet method combination depickling, dedusting, purification at present, and these technology application can make flue gas processing reach the emission request of " consumer waste incineration pollution control criterion " and " dangerous waste incineration pollution control criterion ".But said method changes smoke components and the stability control ability for the treatment of effect is limited.
Utility model content
The utility model is intended to solve at least to a certain extent one of technical problem in correlation technique.For this reason, an object of the present utility model is to propose a kind of system of processing incineration flue gas, and this system can effectively change complicated incineration flue gas to composition and stablize processing.
According to the system of the processing incineration flue gas of embodiment of the present utility model, comprising:
Quench tower, described quench tower has tower flue gas import, tower flue gas outlet, low-temperature receiver import and the outlet of dirt mud, and described quench tower is suitable for described incineration flue gas to lower the temperature;
Recirculating fluidized bed, described recirculating fluidized bed has fluidized bed smoke import, fluidized bed smoke outlet, lime import and alkali lye import, and described fluidized bed smoke import is connected with described tower flue gas outlet, to remove the sour gas in described incineration flue gas;
Sack cleaner, described sack cleaner has deduster gas approach, described deduster exhanst gas outlet and flying dust outlet, described deduster gas approach is connected with described fluidized bed smoke outlet, and described sack cleaner and the incineration flue gas that is suitable for described active carbon jetting device to discharge carry out dust removal by filtration processing;
Active carbon adding apparatus, described active carbon jetting device is arranged between described recirculating fluidized bed and described sack cleaner, and be connected with described deduster gas approach with the outlet of described fluidized bed smoke respectively, described active carbon adding apparatus is suitable for spraying into active carbon in described recirculating fluidized bed to adsorb heavy metal in described incineration flue gas with dioxin pollutant to the incineration flue gas of discharging;
Alkali lye spray scrubber, described alkali lye spray scrubber has scrubbing tower gas approach, scrubbing tower exhanst gas outlet and alkali lye import, described scrubbing tower gas approach is connected with described deduster exhanst gas outlet, and described alkali lye spray scrubber is suitable for remove sour gas, solid particle and the heavy metal in the incineration flue gas of discharging from described sack cleaner.
The system of the processing incineration flue gas of above-described embodiment can be down to 200~250 degrees Celsius by the temperature of incineration flue gas by quench tower in one second, can thoroughly the sour gas in incineration flue gas be discharged further by recirculating fluidized bed and alkali lye spray scrubber.The system of the processing incineration flue gas of application the utility model above-described embodiment thoroughly removal heavy metal with dioxin pollutant.The system of the processing incineration flue gas of above-described embodiment goes for processing, the processing of industrial waste incineration flue gas and the processing of dangerous waste incineration flue gas of incineration flue gas of household garbage in addition, and after processing, exhaust emissions concentration can reach respectively national relevant emission standards.
In embodiment more of the present utility model, the system of the processing incineration flue gas of above-described embodiment can further include: waste heat boiler, described waste heat boiler is connected with described quench tower, and is suitable for reclaiming the heat of described incineration flue gas.Can further improve thus treatment effeciency and heat utilization ratio, avoid energy waste.
In embodiment more of the present utility model, the system of the processing incineration flue gas of above-described embodiment can further include:
Demister, described demister is connected with described alkali lye spray scrubber, and is suitable for removing water smoke;
Adsorbent equipment, described adsorbent equipment is connected with described demister, and is suitable for absorbing acid gases, heavy metal particles He dioxin pollutant.Can combine use with adsorbent equipment by demister thus, can further improve the adsorption capacity of adsorbent in adsorbent equipment, to further improve the pollutant treatment effeciency of incineration flue gas.
In an embodiment of the present utility model, the multilayer adsorbent beds that described adsorbent equipment is lower resistance.Can further remove thus water smoke, sour gas, heavy metal dusts He dioxin pollutant.
In embodiment more of the present utility model, the system of the processing incineration flue gas of above-described embodiment can further include: flying dust temporary library, described flying dust temporary library is connected with described quench tower, described sack cleaner and adsorbent equipment, to deposit from the dirt mud of described quench tower, from the flying dust of described sack cleaner and from the spent sorbents of adsorbent equipment.
In embodiment more of the present utility model, one of being at least connected of described demister and described alkali lye spray scrubber, described recirculating fluidized bed and described quench tower, so as by the alkali lye of discharging from described demister be back to described alkali lye spray scrubber, described recirculating fluidized bed and described quench tower one of at least.Can further improve thus the utilization rate of alkali lye, to further improve treatment effeciency.
Brief description of the drawings
Fig. 1 is according to the structural representation of the system of the processing incineration flue gas of an embodiment of the utility model.
Fig. 2 is according to the structural representation of the system of the processing incineration flue gas of another embodiment of the utility model.
Fig. 3 is the flow chart of processing incineration flue gas method according to the system of processing incineration flue gas of utilizing an embodiment of the utility model.
Fig. 4 is the flow chart of processing incineration flue gas method according to the system of processing incineration flue gas of utilizing another embodiment of the utility model.
Detailed description of the invention
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
The system of the processing incineration flue gas of implementing according to the utility model is described below with reference to Fig. 1.
Comprise according to the system 100 of the processing incineration flue gas of the utility model embodiment: quench tower 10, recirculating fluidized bed 20, sack cleaner 30, active carbon adding apparatus 40, alkali lye spray scrubber 50;
Wherein, quench tower 10 has tower flue gas import 11, tower flue gas outlet 12, low-temperature receiver import 13 and dirt mud outlet 14; Quench tower 10 is suitable for incineration flue gas to lower the temperature, to obtain low temperature incineration flue gas.According to specific embodiment of the utility model, utilize above-mentioned quench tower can make the temperature of incineration flue gas be down to rapidly 200~250 degrees Celsius by spraying into the form of water smoke; For example can in 1 second, the temperature of incineration flue gas be dropped to 200 degrees Celsius from 500~600 degrees Celsius.Can further improve thus the efficiency of processing incineration flue gas.
Recirculating fluidized bed 20 has fluidized bed smoke import 21, fluidized bed smoke outlet 22, lime import 23 and alkali lye import 24, and fluidized bed smoke import 21 is connected with the tower flue gas outlet 12 of quench tower; Spray into respectively lime and alkali lye from lime import 21 and alkali lye import 22, to remove the sour gas in incineration flue gas; According to specific embodiment of the utility model, can effectively control the addition of lime and alkali lye by lime import 21 and alkali lye import 22, according to specific embodiment of the utility model, lime and alkali lye can be added in recirculating fluidized bed 20 according to the proportioning of 1:1.Can further improve resource utilization thus and remove the efficiency of sour gas, adding lime can reduce the consumption of alkali lye, making sour gas generate calcium salt and remove, to reduce operating cost.According to specific embodiment of the utility model, lime and alkali lye can adopt respectively blast injection, and ratio is adjustable.
Sack cleaner 30 has deduster gas approach 31, deduster exhanst gas outlet 32 and flying dust outlet 33, and deduster gas approach 31 is connected with the fluidized bed smoke outlet 22 of recirculating fluidized bed 20; Sack cleaner 30 and the incineration flue gas that is suitable for active carbon jetting device to discharge carry out dust removal by filtration processing.Can effectively remove thus solid particle flue dust in incineration flue gas etc.
Active carbon jetting device 40 is arranged between recirculating fluidized bed 20 and sack cleaner 30, and active carbon adding apparatus 40 is suitable for to spray into active carbon from the incineration flue gas of recirculating fluidized bed 20 interior discharges to adsorb heavy metal in incineration flue gas with dioxin pollutant.Thus by active carbon jetting device 40 being set between recirculating fluidized bed 20 and sack cleaner 30, can be before removing solid particle, utilize active carbon by the heavy metal in incineration flue gas with dioxin pollutant adsorbs, filtered by sack cleaner 30 thereby form large particle.Sack cleaner 30 not only can filter out the solid flue dust in incineration flue gas thus, can also filter out heavy metal and the dioxin pollutant of part, can further improve thus the contaminant removal efficiency of processing incineration flue gas.
Alkali lye spray scrubber 50 has scrubbing tower gas approach 51, scrubbing tower exhanst gas outlet 52 and alkali lye import 53, and scrubbing tower gas approach 51 is connected with deduster exhanst gas outlet 32.Alkali lye spray scrubber 50 is suitable for remove sour gas, solid particle and the heavy metal in the incineration flue gas of discharging from sack cleaner.Further incineration flue gas is purified again thus.
As shown in Figure 2, according to specific embodiment of the utility model, the system of the processing incineration flue gas of above-described embodiment can further include: waste heat boiler 60, waste heat boiler 60 is connected with the tower flue gas import of quench tower 10, and is suitable for reclaiming the heat of incineration flue gas.Can further improve thus treatment effeciency and heat utilization ratio, avoid energy waste.
According to specific embodiment of the utility model, the system of the processing incineration flue gas of above-described embodiment can further include: demister 70 and adsorbent equipment 80; Demister 70 has demist gas approach 71, demist exhanst gas outlet 72 and spent lye outlet 73, and demist gas approach 71 is connected with scrubbing tower exhanst gas outlet 52; Adsorbent equipment 80 has absorption gas approach 81 and purifying smoke outlet 82 and spent sorbents outlet 83, and absorption gas approach 81 is connected with demist exhanst gas outlet 72.
According to specific embodiment of the utility model, demister 70 is suitable for removing the water smoke from the incineration flue gas of alkali lye spray scrubber 50 interior discharges; Adsorbent equipment 80 is suitable for absorbing acid gases, heavy metal particles He dioxin pollutant.The system of the processing incineration flue gas of the utility model embodiment arranges associating use by demister 70 with adsorbent equipment 80, demister 70 can be removed 50% the water smoke of being not less than in incineration flue gas in advance, can avoid thus water smoke to form shutoff to the interior adsorbent of adsorbent equipment 80, reduce surface area and the activity of adsorbent, and then improve adsorbent utilization ratio, to further improve the pollutant removing efficiency of incineration flue gas and reduce pollutant load.
Therefore the system of the processing incineration flue gas of the utility model above-described embodiment is combined use by demister 70 is set with adsorbent equipment 80, there is compared with " demister+heater " in correlation technique the white cigarette effect that disappears more stable, more energy-conservation (not needing to heat again), the advantage of minimizing Air Pollutant Emission total amount; Same demister 70 is combined use can effectively prevent that compared with " coke absorption separately " process for purifying water smoke from can form shutoff to adsorbent with adsorbent equipment 80, reduce adsorbent specific area and activity and can reduce adsorbent consumption, thereby reducing the advantages such as operating cost.Therefore the system of the processing incineration flue gas of the utility model above-described embodiment can improve more than 30% the removal efficiency of atmosphere pollution.
According to specific embodiment of the utility model, adsorbent equipment can adopt the multilayer adsorbent beds of lower resistance.Make thus pollutant removing rate reach 80% high clean-up effect.
Further comprise according to the system of the processing incineration flue gas of the utility model above-described embodiment: flying dust temporary library 90, the spent sorbents outlet 83 of the dirt mud outlet 14 of flying dust temporary library 90 and quench tower, the flying dust outlet 33 of sack cleaner and adsorbent equipment is connected, to deposit from the dirt mud of quench tower 10 with from the flying dust of sack cleaner 30 and from the spent sorbents of adsorbent equipment 80.
According to specific embodiment of the utility model, one of being at least connected of the spent lye outlet 73 of demister and low-temperature receiver import 13, the alkali lye import 53 of alkali lye spray scrubber and the alkali lye import 24 of recirculating fluidized bed of quench tower, so as by the alkali lye of discharging from demister 70 be back to alkali lye spray scrubber 50, recirculating fluidized bed 20 and quench tower 10 one of at least.The utilization rate that can further improve thus alkali lye, avoids waste, and further improves treatment effeciency simultaneously.
Going for various incineration flue gas according to the system of the processing incineration flue gas of the utility model above-described embodiment, for example, can be incineration flue gas of household garbage, industrial waste incineration flue gas, dangerous waste incineration flue gas etc.Process the more complicated incineration flue gas of composition and still can reach stable treatment effect, and can reach relevant control criterion and the pollutant emission standard polluted of country.
The method of describing the system processing incineration flue gas of the processing incineration flue gas that utilizes above-described embodiment below with reference to Fig. 3, the method comprises:
S100: cooling rapidly
According to specific embodiment of the utility model, the processing of first incineration flue gas being lowered the temperature.Specifically incineration flue gas can be passed in quench tower 10, to incineration flue gas is lowered the temperature and obtained low temperature incineration flue gas.Can further improve thus treatment effeciency.Quench tower 10 can be down to rapidly 200~250 degrees Celsius by the temperature of incineration flue gas the utmost point short time of 1 second by the form that sprays into water smoke, for example, the temperature of incineration flue gas can be dropped to 200 degrees Celsius from 500~600 degrees Celsius.Can control thus incineration flue gas generation of dioxin.
S200: remove sour gas
According to specific embodiment of the utility model, further above-mentioned low temperature incineration flue gas is delivered in the recirculating fluidized bed 20 being connected with quench tower 10, sprays into respectively lime by lime import 21 and alkali lye import 22 and alkali lye is removed the sour gas in described incineration flue gas simultaneously.According to specific embodiment of the utility model, can effectively control the addition of lime and alkali lye by lime import 21 and alkali lye import 22, according to specific embodiment of the utility model, lime and alkali lye can be added in recirculating fluidized bed 20 according to the proportioning of 1:1.Can further improve resource utilization thus and remove the efficiency of sour gas, the lime adding can absorb the calcium salt producing after sour gas to be removed in follow-up sack cleaner, reduces alkali lye consumption, has also reduced depickling operating cost.
S300: charcoal absorption heavy metal is with dioxin pollutant
According to specific embodiment of the utility model, to spray into active carbon in the incineration flue gas of discharging from recirculating fluidized bed in case the heavy metal in absorption incineration flue gas (if the) such as mercury, lead, cadmium are with dioxin pollutant.
S400: filter flying dust
Incineration flue gas after utilizing sack cleaner to adsorption treatment carries out dust removal by filtration processing.Not only can filter out thus flying dust, can also filter out absorption has heavy metal with the active carbon of dioxin pollutant.Can remove thus flying dust, heavy metal He dioxin pollutant in incineration flue gas.And then purity and the contaminant removal efficiency of raising incineration flue gas.
S500: remove sour gas, solid particle and heavy metal
Utilize alkali lye spray scrubber to wash the incineration flue gas through described dust removal by filtration processing, to remove sour gas, solid particle and heavy metal.Can further purify incineration flue gas thus.
According to specific embodiment of the utility model, utilize the method for the system processing incineration flue gas of the processing incineration flue gas of above-described embodiment can further include: to utilize waste heat boiler in advance the incineration flue gas passing in quench tower to be carried out to waste heat recovery.Can further improve thus treatment effeciency and heat utilization ratio, avoid energy waste.
S600: except water smoke, absorbing acid gases, heavy metal particles and dioxin pollutant
As shown in Figure 4, according to another specific embodiment of the present utility model, utilizing the system of the processing incineration flue gas of above-described embodiment to process the method for incineration flue gas can further include: utilize demister to remove the water smoke the incineration flue gas of discharging from alkali lye spray scrubber, further utilize the incineration flue gas that adsorbent equipment absorption discharges from demister sour gas, heavy metal particles with dioxin pollutant.The incineration flue gas of discharging from alkali lye spray scrubber containing water smoke, saliferous in water smoke, acid gas-containing, containing alkali, containing compositions such as heavy metal particles and ions.Because water smoke easily produces white cigarette, utilize the system of the processing incineration flue gas of the utility model embodiment first the incineration flue gas that contains a large amount of water smokes after alkali lye spray is processed can be carried out to demist processing, remove 50% the water smoke of being not less than in incineration flue gas, to eliminate white cigarette, carry out again afterwards the further absorbing acid gases of adsorption treatment, heavy metal particles He dioxin pollutant.Therefore remove in advance water smoke and can avoid water smoke to form shutoff to the interior adsorbent of adsorbent equipment 80, reduce surface area and the activity of adsorbent, and then improve adsorbent utilization ratio, to further improve treatment effeciency and the purity of incineration flue gas.
And at present mainly adopt demist, heating, or the mode such as coke absorption is eliminated white cigarette separately.The system of the processing incineration flue gas of the utility model above-described embodiment is by arranging demister 70 and adsorbent equipment 80, there is compared with " demister+heater " in correlation technique the white cigarette effect that disappears more stable, more energy-conservation (not needing to heat again), the advantage of minimizing Air Pollutant Emission total amount; Same demister 70 is combined with adsorbent equipment 80 and is used " coke absorption separately " process for purifying can effectively prevent that water smoke from can form shutoff to adsorbent, reduces adsorbent specific area and activity and can reduce adsorbent consumption, the advantage such as reduces costs.Therefore the system of the processing incineration flue gas of the utility model above-described embodiment can improve more than 30% the removal efficiency of atmosphere pollution.
According to specific embodiment of the utility model, adsorbent equipment can adopt the multilayer adsorbent beds of lower resistance.Make thus pollutant removing rate reach 80% high clean-up effect.
According to specific embodiment of the utility model, utilize the temporary stock 90 of flying dust to deposit the dirt mud of readme quench tower 10 and from the flying dust of sack cleaner 30 and the spent sorbents of adsorbent equipment 80.
According to specific embodiment of the utility model, said method further comprises: by the alkali lye of discharging from demister 70 be back to alkali lye spray scrubber 50, recirculating fluidized bed 20 and quench tower 10 one of at least.Can utilize thus salkali waste to remove sour gas in incineration flue gas and/or reduce the temperature of incineration flue gas, both having saved processing cost, improving again alkali resource utilization.
The system of processing incineration flue gas according to the utilization of the utility model above-described embodiment goes for processing various incineration flue gas, for example, can be incineration flue gas of household garbage, industrial waste incineration flue gas, dangerous waste incineration flue gas etc.Process the more complicated incineration flue gas of composition and still can reach stable treatment effect, and can reach national relevant emission standards.
In the utility model, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or integral; Can be mechanical connection, can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term in the utility model.
In the description of this description, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term needn't for be identical embodiment or example.And, specific features, structure, material or the feature of description can one or more embodiment in office or example in suitable mode combination.In addition,, not conflicting in the situation that, those skilled in the art can carry out combination and combination by the feature of the different embodiment that describe in this description or example and different embodiment or example.
Although illustrated and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment in scope of the present utility model, amendment, replacement and modification.

Claims (6)

1. a system of processing incineration flue gas, is characterized in that, comprising:
Quench tower, described quench tower has tower flue gas import, tower flue gas outlet, low-temperature receiver import and the outlet of dirt mud;
Recirculating fluidized bed, described recirculating fluidized bed has fluidized bed smoke import, fluidized bed smoke outlet, lime import and alkali lye import, and described fluidized bed smoke import is connected with described tower flue gas outlet;
Sack cleaner, described sack cleaner has deduster gas approach, described deduster exhanst gas outlet and flying dust outlet, and described deduster gas approach is connected with described fluidized bed smoke outlet;
Active carbon adding apparatus, described active carbon jetting device is arranged between described recirculating fluidized bed and described sack cleaner, and is connected with described deduster gas approach with described fluidized bed smoke outlet respectively;
Alkali lye spray scrubber, described alkali lye spray scrubber has scrubbing tower gas approach, scrubbing tower exhanst gas outlet and alkali lye import, and described scrubbing tower gas approach is connected with described deduster exhanst gas outlet.
2. system according to claim 1, is characterized in that, further comprises:
Waste heat boiler, described waste heat boiler is connected with described tower flue gas import.
3. system according to claim 1, is characterized in that, further comprises:
Demister, described demister has demist gas approach, demist exhanst gas outlet and spent lye outlet, and described demist gas approach is connected with scrubbing tower exhanst gas outlet;
Adsorbent equipment, described adsorbent equipment has absorption gas approach and purifying smoke outlet and spent sorbents outlet, and described absorption gas approach is connected with described demist exhanst gas outlet.
4. system according to claim 3, is characterized in that, described adsorbent equipment is multilayer adsorbent beds.
5. system according to claim 3, is characterized in that, further comprises:
Flying dust temporary library, described flying dust temporary library is connected with the flying dust outlet of the dirt mud outlet of described quench tower, described sack cleaner and the spent sorbents outlet of described adsorbent equipment.
6. system according to claim 3, is characterized in that, one of being at least connected of the outlet of described spent lye and the alkali lye import of the low-temperature receiver import of described quench tower, described alkali lye spray scrubber and the alkali lye import of described recirculating fluidized bed.
CN201420297025.8U 2014-03-02 2014-06-05 System for processing incinerating gas Active CN203899430U (en)

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