CN110052155A - A kind of Hg, SO3The system with low-low temperature ESP of cooperation-removal - Google Patents

A kind of Hg, SO3The system with low-low temperature ESP of cooperation-removal Download PDF

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Publication number
CN110052155A
CN110052155A CN201910255841.XA CN201910255841A CN110052155A CN 110052155 A CN110052155 A CN 110052155A CN 201910255841 A CN201910255841 A CN 201910255841A CN 110052155 A CN110052155 A CN 110052155A
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CN
China
Prior art keywords
flying dust
low temperature
dry powder
low
feed bin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910255841.XA
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Chinese (zh)
Inventor
刘含笑
陈招妹
孟银灿
郭高飞
罗诗凯
吴金
沈敏超
骆建友
赵博
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Zhejiang Feida Environmental Science and Technology Co Ltd
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Zhejiang Feida Environmental Science and Technology Co Ltd
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Filing date
Publication date
Application filed by Zhejiang Feida Environmental Science and Technology Co Ltd filed Critical Zhejiang Feida Environmental Science and Technology Co Ltd
Priority to CN201910255841.XA priority Critical patent/CN110052155A/en
Publication of CN110052155A publication Critical patent/CN110052155A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • B01D53/508Sulfur oxides by treating the gases with solids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/64Heavy metals or compounds thereof, e.g. mercury
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/81Solid phase processes
    • B01D53/83Solid phase processes with moving reactants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34Constructional details or accessories or operation thereof
    • B03C3/88Cleaning-out collected particles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/60Heavy metals or heavy metal compounds
    • B01D2257/602Mercury or mercury compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

Abstract

The invention proposes a kind of Hg, SO3The system with low-low temperature ESP of cooperation-removal, including the boiler set gradually by fume treatment flow direction, SCR denitration system, air preheater, gas cooler, low temperature electric precipitator, desulfurizing tower and chimney, it further include modified flying dust spraying system and base dry powder spraying system, the modified flying dust spraying system includes grey library, flying dust reforming apparatus, flying dust feed bin and flying dust injection apparatus, the output end of the bottom ash bucket of the low temperature electric precipitator is connected with grey library, one of ash bucket is connected with flying dust reforming apparatus, the ejection end of flying dust injection apparatus is set to the inlet end of gas cooler, the base dry powder spraying system includes pretreatment unit, base dry powder feed bin and base dry powder injection apparatus, the ejection end of base dry powder injection apparatus is arranged in the outlet side of gas cooler.While with dedusting function, Hg, SO are had both3Efficient removal function, particularly suitable sulphur coal or the relatively low engineering of grey sulphur.

Description

A kind of Hg, SO3The system with low-low temperature ESP of cooperation-removal
[technical field]
The present invention relates to the technical field of purifying coal-fired flue gas, especially a kind of Hg, SO3The low low temperature electric of cooperation-removal removes Dirt system.
[background technique]
The raising of coal-burning power plant's smoke contamination controlled level, to improving, urban air quality status in China's is most important.Mirror In the great environment of Particulate Pollution and social influence, three ministries and commissions such as National Development and Reform Committee, which combine, prints and distributes " coal electricity energy-saving and emission-reduction upgrading With transformation action plan (2014~the year two thousand twenty) ", clear stipulaties eastern region creates Thermal generation unit atmosphere pollution row It puts concentration and basically reaches gas turbine group standard limited value, i.e., under the conditions of benchmark oxygen content 6%, flue dust, SO2、NOxConcentration of emission point It Bu Gaoyu not 10mg/m3、35mg/m3、50mg/m3, west area new-built unit is encouraged to be close to or up to gas turbine group standard limit Value.Minimum discharge has become the theme of coal unit pollution control.
Artificial mercury emissions are mostly derived from fire coal, and coal is the main fuel energy of China, and coal fired power plant discharge becomes mercury Primary discharge source, resulting fire coal mercury pollution is increasingly by domestic concern.Compared to other pollutants, coal-burning boiler Discharge SO in flue gas3Concentration it is lower, but biggish harm can be generated to flue downstream equipment and atmospheric environment.SO3By spray Sulfuric acid mist can be formed in conjunction with steam after leaching tower, easily corrode the pipe-line equipment of flue tail.Flue gas discharge not up to standard is to make The main reason at air pollution.Coal-burning power plant is at present to SO3Removing with Hg is all that individual removing system is respectively adopted, very A kind of rare system can complete SO3It is removed with the joint of Hg, it is proposed that a kind of Hg, SO3The low temperature electric precipitation system of cooperation-removal System.
[summary of the invention]
The object of the invention is to solve the problems of the prior art, a kind of Hg, SO are proposed3The low low temperature electric of cooperation-removal Dust pelletizing system has both Hg, SO while with dedusting function3Efficient removal function, especially suitable for sulphur coal or grey sulphur Relatively low engineering.
To achieve the above object, the invention proposes a kind of Hg, SO3The system with low-low temperature ESP of cooperation-removal, including Boiler, SCR denitration system, air preheater, gas cooler, the low low temperature electric set gradually by fume treatment flow direction removes Dirt device, desulfurizing tower and chimney further include modified flying dust spraying system and base dry powder spraying system, the modified flying dust injection system System includes grey library, flying dust reforming apparatus, flying dust feed bin and flying dust injection apparatus, if the bottom of the low temperature electric precipitator is equipped with A dry ash bucket, the output end of each ash bucket are connected with grey library, and the output end of one of ash bucket is defeated with flying dust reforming apparatus Enter end to be connected, the ejection end of the flying dust injection apparatus is set to the inlet end of gas cooler, the base dry powder injection System includes pretreatment unit, base dry powder feed bin and base dry powder injection apparatus, the injection of the base dry powder injection apparatus End is arranged in the outlet side of gas cooler.
Preferably, the output end of the flying dust reforming apparatus is connected with flying dust feed bin, the output of the flying dust feed bin End is connected with flying dust injection apparatus.
Preferably, being connected with modifying agent storage bin on the flying dust reforming apparatus, the modifying agent storage bin is flying dust Reforming apparatus provides halogen compounds medicament, and the discharge end of the first electric field ash bucket of the low temperature electric precipitator is connected with defeated ash Pipeline, the input terminal of the flying dust reforming apparatus with the output end of ash handing pipeline be connected, in the flying dust reforming apparatus also It is ground using the cinder of the first electric field ash bucket of low temperature electric precipitator as raw material by flying dust reforming apparatus equipped with grinding device It grinds and to be aided with halogen compounds medicament mixed and modified.
Preferably, being also connected with active carbon injection device on the flying dust feed bin, the active carbon injection device is winged Grey feed bin provides active carbon.
Preferably, the output end of the pretreatment unit is connected with base dry powder feed bin, the base dry powder feed bin Output end is connected with base dry powder injection apparatus.
Preferably, base substance injection device is also connected on the pretreatment unit, the base substance injection dress It is set to pretreatment unit and base substance is provided.
Beneficial effects of the present invention:, can before the present invention is arranged in gas cooler by will be modified flying dust injection apparatus Gaseous state Hg in flue gas is adsorbed, it, can be to condensed sulphur after base dry powder injection apparatus is arranged in gas cooler Acid mist carries out absorption neutralization, especially suitable for sulphur coal (Sar > 2%) or grey sulphur ratio (D/S) lower engineering, with dedusting While function, Hg, SO are had both3Efficient removal function.
Feature and advantage of the invention will be described in detail by embodiment combination attached drawing.
[Detailed description of the invention]
Fig. 1 is the present invention a kind of Hg, SO3The structural schematic diagram of the system with low-low temperature ESP of cooperation-removal;
Fig. 2 is the present invention a kind of Hg, SO3The amplification of the part-structure of the system with low-low temperature ESP of cooperation-removal is illustrated Figure.
[specific embodiment]
Refering to fig. 1 with Fig. 2 present invention a kind of Hg, SO3The system with low-low temperature ESP of cooperation-removal, including press fume treatment Boiler 1 that flow direction is set gradually, SCR denitration system 2, air preheater 3, gas cooler 4, low temperature electric precipitator 5, Desulfurizing tower 6 and chimney 7 further include modified flying dust spraying system and base dry powder spraying system, the modified flying dust spraying system Including grey library 8, flying dust reforming apparatus 9, flying dust feed bin 10 and flying dust injection apparatus 11, the bottom of the low temperature electric precipitator 5 Equipped with several ash buckets, the output end of each ash bucket is connected with grey library 8, and the output end and flying dust of one of ash bucket are modified to be filled It sets 9 input terminal to be connected, the ejection end of the flying dust injection apparatus 11 is set to the inlet end of gas cooler 4, the alkali Backbone powder spraying system includes pretreatment unit 12, base dry powder feed bin 13 and base dry powder injection apparatus 14, and the base is dry The ejection end of powder injection apparatus 14 is arranged in the outlet side of gas cooler 4.The output end and flying dust of the flying dust reforming apparatus 9 Feed bin 10 is connected, and the output end of the flying dust feed bin 10 is connected with flying dust injection apparatus 11.On the flying dust reforming apparatus 9 It is connected with modifying agent storage bin 91, the modifying agent storage bin 91 is that flying dust reforming apparatus 9 provides halogen compounds medicament, described The discharge end of first electric field ash bucket 51 of low temperature electric precipitator 5 is connected with ash handing pipeline 52, the flying dust reforming apparatus 9 it is defeated Enter end with the output end of ash handing pipeline 52 be connected, grinding device is additionally provided in the flying dust reforming apparatus 9, with low low temperature electric The cinder of first electric field ash bucket 51 of deduster 5 is raw material, is ground by flying dust reforming apparatus 9 and is aided with halogen compounds medicine Agent is mixed and modified.Active carbon injection device is also connected on the flying dust feed bin 10, the active carbon injection device is flying dust material Storehouse 10 provides active carbon.The output end of the pretreatment unit 12 is connected with base dry powder feed bin 13, the base dry powder feed bin 13 output end is connected with base dry powder injection apparatus 14.Base substance injection dress is also connected on the pretreatment unit 12 It sets, the base substance injection device is that pretreatment unit 12 provides base substance.
The course of work of the present invention:
The present invention a kind of Hg, SO3The working principle of the system with low-low temperature ESP of cooperation-removal are as follows: modified flying dust injection dress It sets before being arranged in gas cooler, using the cinder of the 1st electric field of low temperature electric precipitator as basic material, is galled through mechanical grinding It is blended after broken with halogen (Halothane iodine etc.) compound drug, sprays into flue gas the gaseous state Hg adsorbed in flue gas.Flue gas is cold But flue-gas temperature is down to 90 DEG C hereinafter, the SO3 in flue gas is sufficiently condensed by device from 130 DEG C or so.Base dry powder injection apparatus After being arranged in gas cooler, the appropriate alkalinity dry powder that sprays into effectively can carry out absorption neutralization to condensed sulfuric acid mist, especially suitable For sulphur coal (Sar > 2%) or grey sulphur ratio (D/S) lower engineering.While with dedusting function, Hg, SO are had both3's Efficient removal function, the 5 μ g/m of Hg concentration < of low low temperature electric house outlet flue gas3, SO3 is less than 1ppm
Above-described embodiment is the description of the invention, is not limitation of the invention, after any pair of simple transformation of the present invention Scheme all belong to the scope of protection of the present invention.

Claims (6)

1. a kind of Hg, SO3The system with low-low temperature ESP of cooperation-removal, it is characterised in that: including by fume treatment flow direction according to The boiler (1) of secondary setting, SCR denitration system (2), air preheater (3), gas cooler (4), low temperature electric precipitator (5), Desulfurizing tower (6) and chimney (7) further include modified flying dust spraying system and base dry powder spraying system, the modified flying dust injection System includes that grey library (8), flying dust reforming apparatus (9), flying dust feed bin (10) and flying dust injection apparatus (11), the low low temperature electric remove The bottom of dirt device (5) is equipped with several ash buckets, and the output end of each ash bucket is connected with grey library (8), one of ash bucket it is defeated Outlet is connected with the input terminal of flying dust reforming apparatus (9), and it is cold that the ejection end of the flying dust injection apparatus (11) is set to flue gas But the inlet end of device (4), the base dry powder spraying system include pretreatment unit (12), base dry powder feed bin (13) and base The ejection end of dry powder injection apparatus (14), the base dry powder injection apparatus (14) is arranged in the outlet side of gas cooler (4).
2. a kind of Hg, SO as described in claim 13The system with low-low temperature ESP of cooperation-removal, it is characterised in that: described to fly The output end of grey reforming apparatus (9) is connected with flying dust feed bin (10), and the output end and flying dust of the flying dust feed bin (10) spray Device (11) is connected.
3. a kind of Hg, SO as claimed in claim 1 or 23The system with low-low temperature ESP of cooperation-removal, it is characterised in that: described It is connected on flying dust reforming apparatus (9) modifying agent storage bin (91), the modifying agent storage bin (91) is flying dust reforming apparatus (9) Halogen compounds medicament is provided, the discharge end of the first electric field ash bucket (51) of the low temperature electric precipitator (5) is connected with defeated ash Pipeline (52), the input terminal of the flying dust reforming apparatus (9) with the output end of ash handing pipeline (52) be connected, the flying dust changes Property device (9) in be additionally provided with grinding device, using the cinder of the first electric field ash bucket (51) of low temperature electric precipitator (5) as raw material, It is ground by flying dust reforming apparatus (9) and to be aided with halogen compounds medicament mixed and modified.
4. a kind of Hg, SO as claimed in claim 1 or 23The system with low-low temperature ESP of cooperation-removal, it is characterised in that: described Active carbon injection device is also connected on flying dust feed bin (10), the active carbon injection device is that flying dust feed bin (10) provide activity Charcoal.
5. a kind of Hg, SO as described in claim 13The system with low-low temperature ESP of cooperation-removal, it is characterised in that: described pre- The output end of processing unit (12) is connected with base dry powder feed bin (13), the output end and base of the base dry powder feed bin (13) Dry powder injection apparatus (14) is connected.
6. a kind of Hg, SO as claimed in claim 53The system with low-low temperature ESP of cooperation-removal, it is characterised in that: described pre- Base substance injection device is also connected in processing unit (12), the base substance injection device is that pretreatment unit (12) mention For base substance.
CN201910255841.XA 2019-04-01 2019-04-01 A kind of Hg, SO3The system with low-low temperature ESP of cooperation-removal Pending CN110052155A (en)

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Application Number Priority Date Filing Date Title
CN201910255841.XA CN110052155A (en) 2019-04-01 2019-04-01 A kind of Hg, SO3The system with low-low temperature ESP of cooperation-removal

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110631004A (en) * 2019-10-29 2019-12-31 华北电力大学 Boiler system and method for reducing contamination and coking of high-sodium coal and removing heavy metal
CN110975590A (en) * 2019-12-10 2020-04-10 华北电力大学 Coal-fired system and method for removing sulfur trioxide and mercury by using modified fly ash
CN111068504A (en) * 2019-12-25 2020-04-28 华北电力大学 Method and device for removing heavy metal and VOC (volatile organic compounds) by using modified fly ash

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110631004A (en) * 2019-10-29 2019-12-31 华北电力大学 Boiler system and method for reducing contamination and coking of high-sodium coal and removing heavy metal
CN110975590A (en) * 2019-12-10 2020-04-10 华北电力大学 Coal-fired system and method for removing sulfur trioxide and mercury by using modified fly ash
CN111068504A (en) * 2019-12-25 2020-04-28 华北电力大学 Method and device for removing heavy metal and VOC (volatile organic compounds) by using modified fly ash

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