CN109954399A - Flue gas full-dry method purifying device - Google Patents

Flue gas full-dry method purifying device Download PDF

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Publication number
CN109954399A
CN109954399A CN201910194317.6A CN201910194317A CN109954399A CN 109954399 A CN109954399 A CN 109954399A CN 201910194317 A CN201910194317 A CN 201910194317A CN 109954399 A CN109954399 A CN 109954399A
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CN
China
Prior art keywords
dry
flue gas
purifying
desulfurizer
flue
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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
CN201910194317.6A
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Chinese (zh)
Inventor
刘丽艳
王月昶
钱官平
盛洁
刘朗
陈润祥
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Zhangjiagang Eyre Environmental Protection Engineering Co Ltd
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Zhangjiagang Eyre Environmental Protection Engineering Co Ltd
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Publication date
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Priority to CN201910194317.6A priority Critical patent/CN109954399A/en
Publication of CN109954399A publication Critical patent/CN109954399A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of devices for separating particles from gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/508—Sulfur oxides by treating the gases with solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/68—Halogens or halogen compounds
    • B01D53/685—Halogens or halogen compounds by treating the gases with solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/81—Solid phase processes
    • B01D53/83—Solid phase processes with moving reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/30—Alkali metal compounds
    • B01D2251/304—Alkali metal compounds of sodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/40—Alkaline earth metal or magnesium compounds
    • B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/40—Alkaline earth metal or magnesium compounds
    • B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/606—Carbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

Abstract

This application discloses a kind of flue gas full-dry method purifying devices.The flue gas full-dry method purifying device, including the boiler set gradually, pre-duster, mixing reactor, bag filter, air-introduced machine and chimney, the boiler includes at least burner hearth and flue, heat-exchanger rig and economizer are included at least in the flue, the boiler is externally provided with the first desulfurizer, first desulfurizer is connected to the burner hearth, the flue is connected with SCR reactor, the SCR reactor is set between the heat-exchanger rig and economizer, the flue is connected to the second desulfurizer, second desulfurizer is set to the inlet of the economizer, the mixing reactor is connected to third desulfurizer, described first to being respectively provided with solid particle or the first powdered desulfurizing agent in third desulfurizer, second desulfurizing agent and third desulfurizing agent.The flue gas full-dry method purifying device, occupied area is small, operation energy consumption is low, and reaction efficiency is high, and purification process does not consume water, also generates without waste water.

Description

Flue gas full-dry method purifying device
Technical field
This application involves industrial gas purifying field, in particular to a kind of flue gas full-dry method purifying device.
Background technique
Environment and resource problem are the key subjects that the world today faces, and the northern area of China, which also takes place frequently, atomizes haze phenomenon, Wherein the fossil fuels such as coal, petroleum, natural gas generate a large amount of pollutants (such as dust, SOx, NOx, HCl) in combustion, Environment and the health of the mankind are seriously affected.
Gas cleaning at present generallys use wet cleaning technique in administering, with lime stone slurry, ammonia spirit, sodium hydroxide The alkaline solutions such as solution get off the acid contaminants such as SOx, HCl in flue gas and part dust washing as desulfurizing agent.But this The generally existing equipment investment of a little technical process is big, operating cost is high, seriously corroded, is also easy to produce the problems such as aerosol.
206008422 U of patent of invention CN discloses a kind of " coal-burned industrial boiler flue gas full-dry method minimum discharge purification dress It is standby ", the SNCR denitration equipment being connected including the ontology with boiler, the SCR denitration being connected with the exhanst gas outlet flue of boiler Equipment, the semi-dry desulphurization being connected with the SCR denitration equipment and dust removal integrated equipment, the semi-dry desulphurization with Dust removal integrated equipment connects net gas outlet.Its to the effect that denitration controls and uses semi-dry desulphurization equipment, still needs A large amount of water is consumed, waste water is necessarily led to.So needing to propose to improve.
Summary of the invention
The purpose of the present invention is to provide a kind of flue gas full-dry method purifying devices, to overcome deficiency in the prior art.
To achieve the above object, the invention provides the following technical scheme:
The embodiment of the present application discloses a kind of flue gas full-dry method purifying device, including set gradually boiler, pre-duster, Mixing reactor, bag filter, air-introduced machine and chimney, the boiler include at least burner hearth and flue, in the flue at least Including heat-exchanger rig and economizer, the boiler is externally provided with the first desulfurizer, and first desulfurizer is connected to the furnace Thorax, the flue are connected with SCR reactor, and the SCR reactor is set between the heat-exchanger rig and economizer, the cigarette Road is connected to the second desulfurizer, and second desulfurizer is set to the inlet of the economizer, the mixing reactor It is connected to third desulfurizer, solid particle or the first powdered desulfurization are respectively provided in described first to third desulfurizer Agent, the second desulfurizing agent and third desulfurizing agent.
Preferably, in above-mentioned flue gas full-dry method purifying device, first desulfurizing agent is lime stone or dolomite.
Preferably, in above-mentioned flue gas full-dry method purifying device, second desulfurizing agent is sodium bicarbonate, sesquialter carbonic acid The mixture of one or both of sodium, calcium bicarbonate, magnesium bicarbonate or more.
Preferably, in above-mentioned flue gas full-dry method purifying device, the third desulfurizing agent is sodium bicarbonate, sesquialter carbonic acid The mixture of one or both of sodium.
Preferably, in above-mentioned flue gas full-dry method purifying device, the pre-duster is electric precipitator.
Preferably, in above-mentioned flue gas full-dry method purifying device, the pre-duster is two electric field electric precipitators.
Preferably, in above-mentioned flue gas full-dry method purifying device, the mixing reactor is pipeline reactor.
Compared with the prior art, the advantages of the present invention are as follows: flue gas full-dry method purifying device use device number of units of the present invention Less, occupied area is small, operation energy consumption is low, and reaction efficiency is high, does not need the circulatory system of setting reaction product, and reaction product is direct The raw material as Nacl is discharged, purification process does not consume water, also generates without waste water.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts, It is also possible to obtain other drawings based on these drawings.
Fig. 1 show the schematic illustration of flue gas full-dry method purifying device in the specific embodiment of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out detailed retouch It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention In embodiment, those of ordinary skill in the art's every other implementation obtained without making creative work Example, shall fall within the protection scope of the present invention.
Join Fig. 1 shown in, the flue gas full-dry method purifying device in the present embodiment, including set gradually boiler 100, pre- dedusting Device 200, mixing reactor 300, bag filter 400, air-introduced machine 500 and chimney 600, boiler 100 include at least 110 He of burner hearth Flue 120, flue 120 is interior to include at least heat-exchanger rig and economizer, and boiler 100 is externally provided with the first desulfurizer 111, and first is de- Sulphur device 111 is connected to burner hearth 110, and flue 120 is connected with SCR reactor 700, SCR reactor 700 be set to heat-exchanger rig and Between economizer, flue 120 is connected to the second desulfurizer 121, and the second desulfurizer 121 is set to the inlet of economizer, Mixing reactor 300 is connected to third desulfurizer 310, be respectively provided in first to third desulfurizer 310 solid particle or Powdered the first desulfurizing agent, the second desulfurizing agent and third desulfurizing agent.
In the technical solution, first to third desulfurizer includes conveying device and nozzle, by compressed air by desulfurization Agent is ejected into corresponding position, and specific setting belongs to the prior art and just do not repeat one by one herein, flue gas full-dry method purifying of the present invention Device use device number of units is few, occupied area is small, operation energy consumption is low, and reaction efficiency is high, does not need the circulation of setting reaction product System, reaction product are expelled directly out the raw material as Nacl, and purification process does not consume water, also generate without waste water, and flue gas passes through Desulfurization three times, neat stress can reach minimum discharge standard.
Further, the first desulfurizing agent is lime stone or dolomite, and straying quatity is the 0~15% of weight of fuel.
Further, the second desulfurizing agent be one of sodium bicarbonate, concentrated crystal soda, calcium bicarbonate, magnesium bicarbonate or Two kinds or more of mixture, straying quatity are the 0~5% of weight of fuel.
Further, third desulfurizing agent is the mixture of one or both of sodium bicarbonate, concentrated crystal soda, is sprayed into Amount is greater than zero, and is no more than the 10% of weight of fuel.
In above-mentioned three technical solution, burner hearth cooperates the first desulfurizer, makes high concentration using natural limestone or dolomite Sour gas has obtained the removing of low cost in furnace, reduces the concentration of acid gas in flue gas, creates for subsequent purification step Condition has been made, the economy of entire technique is improved；It is de- for second to use sodium bicarbonate, calcium bicarbonate or magnesium bicarbonate powder Sulphur agent can expeditiously remove the SO3 in flue gas, so that the acid dew point of flue gas be greatly lowered, avoid equipment corrosion, be It improves the thermal efficiency to create condition, simultaneously because flue-gas temperature reduces, the efficiency of dust collection of pre-duster is increased；Using Desulfurizing agent based on the sodium bicarbonate powder of high activity, can be disposably by acid gas removals such as SOx, HCl in flue gas 90~99% or more, so as to avoid using quick lime/calcium hydroxide low reaction efficiency bring by-product that process is recycled, It also avoids to improve the work of water sprinkling for better material moisture process of reactivity and thoroughly avoiding dirt to significantly simplify process and operation The discharge of water.
Further, pre-duster 200 is electric precipitator.
Further, pre-duster 200 is two electric field electric precipitators.
In above-mentioned two technical solution, the flue gas of flue outlet carries dust, reaction product and unreacted a small amount of desulfurizing agent Into pre-duster, under the action of high voltage electric field, 90% or more solid particle is electrostatically attracted on wire electrode and is shaken Removing is played, is collected into ash bucket and is periodically discharged.
Further, mixing reactor 300 is pipeline reactor.
In the technical solution, the thick flue gas after pre- dedusting enters mixing reactor, which uses pipeline reactor, the The third desulfurizing agent and smoke reaction that three desulfurizers spray into, thoroughly remove the sour gas such as SOx, HCl therein, make always to remove Rate can reach 99% or more.
In use, three times the flue gas after desulfurization entrainment of reaction product and a small amount of unreacted third desulfurizing agent and Dust enters the bag filter of connection, and bag filter uses multicell cloth envelop collector, accumulates on cloth bag certain thickness Reaction mass, when passing through cloth bag, wherein a small amount of unreacted sour gas can improve reaction efficiency so that the reaction was continued to flue gas； The impurity such as the denier heavy metal particles contained in flue gas, while the high surface area for being desulfurized agent is adsorbed, and is removed together in cloth bag It is removed in dirt device, the dustiness of the neat stress come out from filter bag can satisfy most stringent of minimum discharge requirement；Then neat stress Pass through smoke stack emission to high-altitude after air-introduced machine pressurizes.
The back-blowing device that reaction product is carried by bag filter is blown off into ash bucket, is periodically discharged after collection.Due to sodium The high reaction activity of salt, reactant utilization rate can reach 90% or more, and the salt in product is with Na2SO4Based on, content can expire Requirement of the foot as Nacl raw materials for production.Due to reaction efficiency height, sorbent utilization is high, reaction product process recycling pair It improves efficiency to have no and significantly improve, therefore do not need the cyclic process of setting reaction product, to significantly simplify process, drop Low operation difficulty, improves system reliability, supplies consumption and energy consumption are also lower.
Since the sour gas in flue gas has obtained more thoroughly removing, blower, flue and the cigarette in purification device downstream The installations and facilities such as chimney may be selected carbon steel or concrete material and not need to carry out special preservative treatment, save it is a large amount of it is high-level not The dosage of rust steel.
In conclusion flue gas full-dry method purifying device use device number of units of the present invention is few, occupied area is small, operation energy consumption Low, reaction efficiency is high, does not need the circulatory system of setting reaction product, and reaction product is expelled directly out the raw material as Nacl, Purification process does not consume water, also generates without waste water.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that There is also other identical elements in process, method, article or equipment including the element.
The above is only the specific embodiment of the application, it is noted that for the ordinary skill people of the art For member, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also answered It is considered as the protection scope of the application.

Claims (7)

1. a kind of flue gas full-dry method purifying device, which is characterized in that including the boiler, pre-duster, hybrid reaction set gradually Device, bag filter, air-introduced machine and chimney, the boiler include at least burner hearth and flue, include at least heat exchange in the flue Device and economizer, the boiler are externally provided with the first desulfurizer, and first desulfurizer is connected to the burner hearth, the cigarette Road is connected with SCR reactor, and the SCR reactor is set between the heat-exchanger rig and economizer, and the flue is connected to Second desulfurizer, second desulfurizer are set to the inlet of the economizer, and the mixing reactor is connected to Three desulfurizers are respectively provided with solid particle or the first powdered desulfurizing agent, second in described first to third desulfurizer Desulfurizing agent and third desulfurizing agent.
2. flue gas full-dry method purifying device according to claim 1, it is characterised in that: first desulfurizing agent is lime stone Or dolomite.
3. flue gas full-dry method purifying device according to claim 1, it is characterised in that: second desulfurizing agent is bicarbonate The mixture of one or both of sodium, concentrated crystal soda, calcium bicarbonate, magnesium bicarbonate or more.
4. flue gas full-dry method purifying device according to claim 1, it is characterised in that: the third desulfurizing agent is bicarbonate The mixture of one or both of sodium, concentrated crystal soda.
5. flue gas full-dry method purifying device according to claim 1, it is characterised in that: the pre-duster is electric precipitation Device.
6. flue gas full-dry method purifying device according to claim 5, it is characterised in that: the pre-duster is two electric fields electricity Deduster.
7. flue gas full-dry method purifying device according to claim 1, it is characterised in that: the mixing reactor is duct type Reactor.
CN201910194317.6A 2019-03-14 2019-03-14 Flue gas full-dry method purifying device Pending CN109954399A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN201910194317.6A CN109954399A (en) 2019-03-14 2019-03-14 Flue gas full-dry method purifying device

Publications (1)

Publication Number Publication Date
CN109954399A true CN109954399A (en) 2019-07-02

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110252124A (en) * 2019-05-22 2019-09-20 山东中琦环保设备制造有限公司 A kind of full-dry desulfurizing technique and system
CN110559776A (en) * 2019-08-27 2019-12-13 北京矿冶科技集团有限公司 Processing apparatus of electrolyte high temperature flue gas

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110252124A (en) * 2019-05-22 2019-09-20 山东中琦环保设备制造有限公司 A kind of full-dry desulfurizing technique and system
CN110559776A (en) * 2019-08-27 2019-12-13 北京矿冶科技集团有限公司 Processing apparatus of electrolyte high temperature flue gas

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