CN109381988A - A kind of device preventing ammonia process desulfuration tower Crystallization Plugging - Google Patents

A kind of device preventing ammonia process desulfuration tower Crystallization Plugging Download PDF

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Publication number
CN109381988A
CN109381988A CN201811605672.XA CN201811605672A CN109381988A CN 109381988 A CN109381988 A CN 109381988A CN 201811605672 A CN201811605672 A CN 201811605672A CN 109381988 A CN109381988 A CN 109381988A
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CN
China
Prior art keywords
section
spray
absorbing liquid
gas
washing
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
CN201811605672.XA
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Chinese (zh)
Inventor
王丰海
徐同华
郭学军
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Shandong Shengbao Heat Transfer Technology Co Ltd
Original Assignee
Shandong Shengbao Heat Transfer Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
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Application filed by Shandong Shengbao Heat Transfer Technology Co Ltd filed Critical Shandong Shengbao Heat Transfer Technology Co Ltd
Priority to CN201811605672.XA priority Critical patent/CN109381988A/en
Publication of CN109381988A publication Critical patent/CN109381988A/en
Pending legal-status Critical Current

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    • 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
    • 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
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia

Abstract

The present invention relates to a kind of device for preventing ammonia process desulfuration tower Crystallization Plugging, the bottom of desulfurizing tower is absorbing liquid section, and the top of absorbing liquid section is successively enriching section, absorber portion, washing demisting section and demister section；Closed tower Internal baffle is equipped between absorbing liquid section and enriching section, it is equipped with concentration between enriching section and absorber portion and rises gas disk, setting washing section rises gas disk between absorber portion and washing demisting section, it washes in demisting section and is equipped with washing demisting section filler, washing section spraying layer, mist eliminator flushing is equipped in demister section to spray, it will not be crystallized in spraying layer structure, reduce the aggregation that desulfurization ammonium salt divides evaporative crystallization in enriching section, therefore it can prevent liter gas pan portion position crystallization bridging from increasing flue gas circulation, mainly prevent a liter gas pan portion position crystallization bridging, crystallization bridging is removed simultaneously, increase rise gas circle or whirl in the air chamber circulation, reduce running resistance 50Pa or so in tower, improve the water balance of absorbing liquid system, circulation fluid utilization rate greatly improves 90% or more.

Description

A kind of device preventing ammonia process desulfuration tower Crystallization Plugging
Technical field
The present invention relates to a kind of ammonia process desulfuration towers, specifically, being related to a kind of dress for preventing ammonia process desulfuration tower Crystallization Plugging It sets, belongs to chemical technology field.
Background technique
Currently, generalling use ammonia desulfurizing process to reduce SO2Discharge, research of the China to flue gas desulfurization and denitrification technology Increasingly pay attention to, ammonia process of desulfurization absorbent uses liquefied ammonia or ammonium hydroxide, so that it may accomplish there is no " three wastes " generation: exhaust gas row up to standard It puts, no waste water, waste sludge discharge, desulfurizing byproduct are ammonium sulfate.
Saturated crystallization is that a kind of main technique scheme of ammonia process by-product crystallization utilizes import cigarette in absorption tower in tower Moisture evaporates during the heat of gas sprays absorbing liquid in tower, and solution is up to saturated concentration and crystallization is precipitated, and loop slurry is sent After by-product system is separated by solid-liquid separation, finished product is made in solid, and mother liquor resorption is received system circulation and used.
In the implementation of the present invention, the discovery prior art at least has the disadvantage that inventor
1, in actual moving process, for saturated crystallization enriching section because of moisture evaporation, crystallization is precipitated after reaching saturated concentration in solution in tower It is not thorough, the enriching section that results in blockage rises the blocking of bubble cover gas outlet, increases system resistance.
2, ammonia process of desulfurization enriching section circulation fluid leans on the mode of absorbing liquid overflow supplement, causes water balance difficult, causes to wash Section, absorber portion, the circulation fluid water of enriching section are uneven, for maintenance level weighing apparatus can only part outlet, ammonium sulfate solution recycling is difficult, then Utilizing status is poor.
Therefore, the processing method that Crystallization Plugging is handled in ammonia process desulfuration tower also needs to continuously improve.
Summary of the invention
The problem to be solved in the present invention is against the above deficiency, to provide a kind of dress for preventing ammonia process desulfuration tower Crystallization Plugging It sets, after this method and device, realizes following purpose:
1) flue gas contacts very abundant with desulfurization absorbing liquid, and the liquid/gas of desulphurization system is reduced under the premise of guaranteeing desulfuration efficiency Than (L/G)；Traditional liquid/gas ratio (L/G) is 6 or more, and liquid/gas ratio (L/G) of the present invention is 4-5 or so.
2) enriching section flue-gas temperature is excessively high in ammonia process desulfuration tower and reduces the water content in flue gas, the blocking of gas phase nodeless mesh；
3) concentrate, the extraction supplement of absorbing liquid and systematic water balance；
4) the operation power of desulphurization system main air blower, absorption system circulating pump is reduced, and is conducive to control flue gas exit temperature Raising；
5) recycling for reducing operating cost mitigates environment protection sewage and discharges pressure.
In order to solve the above problem, The technical solution adopted by the invention is as follows: a kind of ammonia process desulfuration tower Crystallization Plugging of preventing Device, it is characterised in that: the bottom of desulfurizing tower is absorbing liquid section, and the top of absorbing liquid section is successively enriching section, absorber portion, washing Demisting section and demister section；
It is equipped with closed tower Internal baffle between absorbing liquid section and enriching section, concentration is equipped between enriching section and absorber portion and rises gas disk, Setting washing section rises gas disk between absorber portion and washing demisting section, and washing demisting section filler, washing section are equipped in washing demisting section Spraying layer, the interior mist eliminator flushing that is equipped with of demister section spray.
Further, it is provided with absorption cycle pipeline between absorbing liquid section and absorber portion, is provided in absorber portion and two-way The first spray tube, the second spray tube of absorption cycle pipeline connection, are communicated with absorbent recirculation pump on absorption cycle pipeline.
Spray equipment is provided in enriching section, the concentrated circulating pump of spray equipment is connected to the bottom of thickener, thickener The concentrated delivery pump of slurries is connected to by-product processing system, is communicated in the middle part of the bottom of enriching section and thickener and is converged reflux Pipeline.
Further, the lower part that concentration rises gas disk is provided with rinse spray structure, and rinse spray structure includes the spray of connection Head, spray tube, spray tube are connected to through control valve with absorption cycle pipeline, and spray head is mounted on spray tube upwards or on oblique, are sprayed Shower pipe bottom is equipped with drainage hole.
Further, after flue gas enters desulfurizing tower from gas inlet, flue-gas temperature is in 135 DEG C or so of hot fume de- Ammonium sulfate is concentrated by evaporation in sulphur tower enriching section, flue-gas temperature is decreased to less than 55 DEG C, enters back into absorber portion, anti-with absorbing liquid It answers, SO therein2Major part is removed, and flue-gas temperature is further reduced to about 50 DEG C or so, and the neat stress after absorption passes through Wash after the purification of demisting section through exhanst gas outlet) discharge desulfurizing tower.
Further, the ammonium salt absorbed in flue gas in the spraying layer cyclic process of demisting section, interruption supplement Fresh process are washed Water.
Further, absorbent recirculation pump passes through spray irrigation structure by liquid in absorbing liquid section through absorption cycle pipeline The gas outlet that spray head rises gas pan bottom to concentration is rinsed dilution, reduces crystallization and (it is molten close to generating to rinse dilution with absorbing liquid Liquid), it falls on tower Internal baffle；
Further, control valve is sprayed structure according to time and Liquid level.
Further, the concentrated circulating pump of concentrate in thickener, is sprayed by spray equipment, in ammonia process of desulfurization flue gas Sulfur dioxide and ammonium hydroxide reaction generate ammonium sulfate using high-temperature flue gas carry out circulation concentration improve concentration, mentioned into post-processing Take sulfuric acid ammonium product.
Further, the spray liquid after flushing liquor and concentrated circulating pump sprinkling after being sprayed structure sprinkling converges, tower Internal baffle enters in thickener from desulfurizing tower enriching section bottom through converging reflux line, and the partially liq is made to obtain secondary concentration.
Further, absorption pump absorbing liquid flows back into thickener and is ganged up, and makes slurries concentration balance, balance in thickener System concentrate, absorbing liquid, water lotion, the concentrated delivery pump of concentrate in thickener are delivered to after-treatment device.
The invention adopts the above technical scheme, compared with prior art, has the advantage that
Through testing, ammonia process of desulfurization crystallization inside tower is cleared up compared with traditional desulphurization system, will not be crystallized in spraying layer structure, is reduced Desulfurization ammonium salt divides evaporative crystallization in the aggregation of enriching section, therefore can prevent liter gas pan portion position crystallization bridging from increasing flue gas circulation, The crystallization bridging of liter gas pan portion position is mainly prevented, while removing crystallization bridging, increases and rises gas and circle or whirl in the air chamber circulation, reduce operation in tower Resistance 50Pa or so.
Improve the water balance of absorbing liquid system, weighing apparatus of improving the standard the result is that in order to improve circulation fluid utilization rate, reduce useless The outlet of water, circulation fluid utilization rate greatly improve 90% or more.
The present invention is described in detail with reference to the accompanying drawings and examples.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram that ammonia process desulfuration tower Crystallization Plugging device is prevented in the embodiment of the present invention；
Attached drawing 2 is the structural schematic diagram of desulfurizing tower concentration spray in the embodiment of the present invention；
In figure:
Delivery pump is concentrated in 1- desulfurizing tower, 2- absorbent recirculation pump, 3- concentrated circulating pump, 4- thickener, 5-, and 6- is sprayed structure, 7- absorption cycle pipeline, 8- concentration cycles pipeline, 9- converge reflux line, and 10- concentration rises gas disk, 11- tower Internal baffle, 12- control Valve processed, 13- spray head, 14- spray tube, 15- absorbing liquid section, 16- enriching section, 17- absorber portion, the first spray tube of 18-, 19- Two spray tubes, 20- spray equipment, the gas outlet 21-, 22- washing section rise gas disk, and 23- washes demisting section filler, the spray of 24- washing section Drenching layer, 25- demister section, 26- mist eliminator flushing spray, 27- wash demisting section, 28- gas inlet, 29- exhanst gas outlet.
Specific embodiment
As shown in Figure 1 and Figure 2, a kind of device preventing ammonia process desulfuration tower Crystallization Plugging, the bottom of the desulfurizing tower 1 are to absorb Liquid section 15, the top of absorbing liquid section 15 are enriching sections 16, and the top of enriching section 16 is absorber portion 17, and the top of absorber portion 17 is Demisting section 27 is washed, the top of washing demisting section 27 is demister section 25, and closing is equipped between absorbing liquid section 15 and enriching section 16 Tower Internal baffle 11, tower Internal baffle 11 is the demarcation plate of absorbing liquid section 15 Yu enriching section 16, between enriching section 16 and absorber portion 17 Gas disk 10 is risen equipped with concentration, concentration rises the demarcation plate that gas disk 10 belongs to enriching section 16 Yu absorber portion 17, and absorber portion 17 is removed with washing Washing section is set between mist section 27 and rises gas disk 22, washing section, which rises, is equipped with washing demisting section in the washing demisting section 27 on 22 top of gas disk Filler 23, washing section spraying layer 24, demister section 25 is interior to be equipped with mist eliminator flushing spray 26.
Two-way absorption cycle pipeline 7 is provided between absorbing liquid section 15 and absorber portion 17, it is settable more according to the actual situation Road pipeline, the present embodiment are stated by two-way design, and the first spray being connected to two-way absorption cycle pipeline 7 is provided in absorber portion 17 Shower pipe 18, the second spray tube 19 are communicated with absorbent recirculation pump 2 on absorption cycle pipeline 7, are provided with spray equipment in enriching section 16 20, the concentrated circulating pump 3 of spray equipment 20 is connected to the bottom of thickener 4, the concentrated delivery pump 5 of 4 slurries of thickener and by-product The connection of object processing system, by-product processing system are that concentrate is separated by solid-liquid separation process life using cyclonic separation, centrifugal dehydration etc. It is ammonium sulfate at by-product, by-product processing system is the common apparatus of this field, it is no longer described in detail herein, enriching section 16 Bottom and the middle part of thickener 4 are communicated with and converge reflux line 9.
It is transformed inside desulfurizing tower 1, i.e., rinse spray structure 6 is set in the lower part that concentration rises gas disk 10, rinses spray Drenching structure 6 includes the spray head 13 of connection, spray tube 14, and spray tube 14 is connected to through control valve 12 with absorption cycle pipeline 7, spray head 13 are mounted on spray tube 14 upwards or on oblique, rinse spray liquid and rise 10 bottom of gas disk, and install and arrange in 14 bottom of spray tube Fluid apertures, drainage hole are for preventing after stopping spraying, and circulation fluid storage time in spray tube 14 is long, causes blocking in pipe；It is dense It is universal architecture that contracting, which rises gas disk 10,.
After flue gas is from gas inlet 28 into desulfurizing tower, flue-gas temperature is concentrated in 135 DEG C or so of hot fume in desulfurizing tower Ammonium sulfate is concentrated by evaporation in section 16, flue-gas temperature is decreased to less than 55 DEG C, enters back into absorber portion 17, react with absorbing liquid, In SO2Major part is removed, and flue-gas temperature is further reduced to about 50 DEG C or so, and the neat stress after absorption is removed by washing Desulfurizing tower is discharged through exhanst gas outlet 29 after the purification of mist section 27.
The ammonium salt absorbed in flue gas is washed in 24 cyclic process of demisting section spraying layer, interruption supplements Fresh process water, even if There is drop entrainment, also most into top demisting section 25 are water droplet, substantially reduce the entrainment of ammonium salt, drop is not easy net Flue gas entrainment.Washing demisting section 27 setting can be greatly lowered system ammonia consumption, improve system ammonia utilization rate, save operation at This.
Using absorbent recirculation pump 2 by liquid in absorbing liquid section 15 through absorption cycle pipeline 7, by being sprayed structure 6 The gas outlet that 13 pairs of spray head concentrations rise 10 bottom of gas disk is rinsed dilution, reduces crystallization and (rinses dilution close to life with absorbing liquid At solution), fall on tower Internal baffle 11, tower Internal baffle 11 be up and down it is closed, as circulation fluid connect disk use；In addition control valve Door 12A/B is (to control the close of absorbing liquid according to interval time and level condition control from spray tube 18,19 liang of spray tube are upper by all means Degree and pH value are maintained at reasonable region and absorb, and improve absorptivity using concentrate, are determined according to concentrated solution density and temperature dense The flow that contracting liquid is conveyed to by-product processing system, and control is adjusted with this and rinses interval time and height of liquid level) be sprayed Structure 6.
In addition the concentrated circulating pump 3 of concentrate in thickener 4, is sprayed, main function is to ammonia process by spray equipment 20 After the ammonium sulfate that sulfur dioxide and ammonium hydroxide reaction in desulfurization fume generate carries out circulation concentration raising concentration using high-temperature flue gas, Sulfuric acid ammonium product is extracted into post-processing.
Be sprayed the flushing liquor after structure 6 is sprayed and concentrated circulating pump 3 spray after spray liquid converge, using being kept off in tower Plate 11 is converged reflux line 9 from 16 bottom of desulfurizing tower enriching section and is entered in thickener 4, obtains the partially liq secondary dense Contracting greatly improves concentration cycles rate, improves concentration process.
Again, 2 absorbing liquid of absorption pump is flowed back into thickener 4 to gang up, makes slurries concentration balance in thickener 4, does To system concentrate, absorbing liquid, water lotion balanced use.After the concentrated delivery pump 5 of concentrate in thickener 4 is delivered to Manage device.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention, Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features. All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention Within protection scope.

Claims (10)

1. a kind of device for preventing ammonia process desulfuration tower Crystallization Plugging, it is characterised in that: the bottom of desulfurizing tower (1) is absorbing liquid section (15), the top of absorbing liquid section (15) is successively enriching section (16), absorber portion (17), washing demisting section (27) and demister section (25)；
Closed tower Internal baffle (11), enriching section (16) and absorber portion (17) are equipped between absorbing liquid section (15) and enriching section (16) Between be equipped with concentration rise gas disk (10), absorber portion (17) and washing demisting section (27) between setting washing section liter gas disk (22), water It removes and is equipped with washing demisting section filler (23), washing section spraying layer (24) in mist section (27), be equipped with demisting in demister section (25) Device rinse spray (26).
2. device as described in claim 1, it is characterised in that:
It is provided with absorption cycle pipeline (7), is provided in absorber portion (17) and two between absorbing liquid section (15) and absorber portion (17) The first spray tube (18), the second spray tube (19) of road absorption cycle pipeline (7) connection, absorption cycle pipeline are communicated on (7) Absorbent recirculation pump (2).
3. being provided with spray equipment (20) in enriching section (16), spray equipment (20) concentrated circulating pump (3) and thickener (4) Bottom connection, the concentrated delivery pump of thickener (4) slurries (5) is connected to by-product processing system, the bottom of enriching section (16) and It is communicated in the middle part of thickener (4) and converges reflux line (9).
4. device as described in claim 1, it is characterised in that: the lower part that concentration rises gas disk (10) is provided with rinse spray structure (6), rinse spray structure (6) includes the spray head (13) of connection, spray tube (14), and spray tube (14) is through control valve (12) and inhales Circulating line (7) connection is received, spray head (13) is mounted on spray tube (14) upwards or on oblique, and spray tube (14) bottom is equipped with drain Hole.
5. the implementation method of device as described in claim 1, it is characterised in that: flue gas enters desulfurizing tower from gas inlet (28) Afterwards, flue-gas temperature is concentrated by evaporation ammonium sulfate, flue gas temperature in 135 DEG C or so of hot fume in desulfurizing tower enriching section (16) Degree is decreased to less than 55 DEG C, enters back into absorber portion (17), reacts with absorbing liquid, SO therein2Major part is removed, flue-gas temperature quilt About 50 DEG C or so are further reduced to, the neat stress after absorption after washing demisting section (27) purification through exhanst gas outlet (29) by arranging Desulfurizing tower out.
6. implementation method as claimed in claim 4, it is characterised in that: absorbed in washing demisting section spraying layer (24) cyclic process Ammonium salt in flue gas, interruption supplement Fresh process water.
7. implementation method as claimed in claim 4, it is characterised in that: absorbent recirculation pump (2) is by absorbing liquid section (15) interior liquid Through absorption cycle pipeline (7), by be sprayed the spray head (13) of structure (6) to concentration rise the gas outlet of gas disk (10) bottom into Row rinses dilution, and reduction crystallization (is rinsed dilution close to generation solution with absorbing liquid), fallen on tower Internal baffle (11)；
Implementation method as claimed in claim 4, it is characterised in that: control valve (12) is according to time and Liquid level spray punching Wash structure (6).
8. implementation method as claimed in claim 4, it is characterised in that: the concentrated circulating pump of concentrate in thickener (4) (3), it is sprayed by spray equipment (20), height is utilized to the ammonium sulfate of sulfur dioxide and ammonium hydroxide reaction generation in ammonia process of desulfurization flue gas Warm flue gas carries out circulation concentration and improves concentration, extracts sulfuric acid ammonium product into post-processing.
9. implementation method as claimed in claim 4, it is characterised in that: the flushing liquor and dense after being sprayed structure (6) sprinkling Spray liquid after contracting circulating pump (3) sprinkling converges, and tower Internal baffle (11) is from desulfurizing tower enriching section (16) bottom through converging return pipe Road (9) enters in thickener (4), and the partially liq is made to obtain secondary concentration.
10. implementation method as claimed in claim 4, it is characterised in that: absorption pump (2) absorbing liquid flow back into thickener (4) into Row is ganged up, and the interior slurries concentration of thickener (4) is balanced, balance system concentrate, absorbing liquid, water lotion, dense in thickener (4) The concentrated delivery pump of contracting liquid (5) is delivered to after-treatment device.
CN201811605672.XA 2018-12-27 2018-12-27 A kind of device preventing ammonia process desulfuration tower Crystallization Plugging Pending CN109381988A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811605672.XA CN109381988A (en) 2018-12-27 2018-12-27 A kind of device preventing ammonia process desulfuration tower Crystallization Plugging

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Application Number Priority Date Filing Date Title
CN201811605672.XA CN109381988A (en) 2018-12-27 2018-12-27 A kind of device preventing ammonia process desulfuration tower Crystallization Plugging

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CN109381988A true CN109381988A (en) 2019-02-26

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112169570A (en) * 2020-10-20 2021-01-05 常德市俊德科技发展有限公司 Chemical industry is integration sulphur removal equipment for waste gas
CN112197835A (en) * 2020-10-28 2021-01-08 安徽晋煤中能化工股份有限公司 Method for preventing instrument from being blocked

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112169570A (en) * 2020-10-20 2021-01-05 常德市俊德科技发展有限公司 Chemical industry is integration sulphur removal equipment for waste gas
CN112197835A (en) * 2020-10-28 2021-01-08 安徽晋煤中能化工股份有限公司 Method for preventing instrument from being blocked

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Address after: 262100 northwest corner of the intersection of Jinshan street and Yanggan Road, Xin'an street, Anqiu City, Weifang City, Shandong Province

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