CN101306318A - Tower top discharge type flue gas desulfurization method and desulfurization tower - Google Patents
Tower top discharge type flue gas desulfurization method and desulfurization tower Download PDFInfo
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- CN101306318A CN101306318A CNA2008100335989A CN200810033598A CN101306318A CN 101306318 A CN101306318 A CN 101306318A CN A2008100335989 A CNA2008100335989 A CN A2008100335989A CN 200810033598 A CN200810033598 A CN 200810033598A CN 101306318 A CN101306318 A CN 101306318A
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Abstract
The present invention relates to a tower top emission type waste gas desulphurization method and a desulphurization tower thereof. The invention discloses the tower top emission type counter-flow waste gas desulphurization tower which is provided with a packing section, a spray section and a bubbling section from top to bottom; a waste gas inlet is arranged between the spray section and the bubbling section, and the bubbling section is arranged at the lower part of the waste gas desulphurization tower. Waste gas enters the desulphurization tower from the waste gas inlet and goes upward to pass through the spray section, thereby being in counter-flow contact with a washing absorption liquid sprayed downward form a sprayer, and generating the gas-liquid two-phase mass transfer and the chemical reaction in liquid phase for removing pollutants. The waste gas continually goes upward from the spray section to enter the packing section for removing foam, the formed purified waste gas enters a direct discharging chimney from a waste gas outlet arranged at the top part of the desulphurization tower, thereby being directly discharged to the atmosphere from the direct discharging chimney and avoiding the problem of needing enhanced corrosion prevention of the original chimney of a boiler in the prior art.
Description
Technical field
The present invention relates to a kind of tower top discharge type boiler waste gas adverse current emission abatement integrated desulfurization method, relate in particular to the technology that from boiler waste gas, reclaims oxysulfide, also relate to tower top discharge type contra-flow exhaust gases cleaning and desulfurization tower, belong to electric power, environmental protection and chemical technology field, especially be fit to the technical field of boiler waste gas desulfurization.
Background technology
Huge chimney is the indispensable device of vast boiler, thermal power plant always.And the construction technology of chimney is very complicated, influences industrial maintenance, reinforcing, enhancing construction and is generally repelled.For example, be that a large amount of boiler flues are discharged in the thermal power plant of fuel with coal or oil, directly arrange through chimney to atmosphere.The blowdown stack height of boiler of power plant generally all adopts reinforcing bar to mix earth material as the intensity shell between 120～250m.Owing to contain acidic gaseous materials such as SOx, NOx, HCl and HF, SO especially wherein in the waste gas
3Gas makes waste gas show acid dew piont corrosion.The acid dew point of waste gas is with SO in the waste gas
3Increase and increase with moisture content, generally between 100～150 ℃.In order to ensure not occurring acid dew piont corrosion in the toxic emission process, from the steam generator system outlet, the EGT of promptly common boiler induced-draft fan outlet is higher 15～25 ℃ than dew point.But for the purpose of safety and over-designed, inner wall of stack all needs liner insulation, especially anti-corrosion material, and with acid resistant adhesive mortar, inferior nexine lining is with acidproof brick at the innermost layer lining that contacts with waste gas.
Along with environmental requirement is more and more stricter, power plant or boiler all need to install flue gas desulphurization unit, and the exhuast gas desulfurization technology of main flow all is the method that the aqueous slurry washing absorbs, or be called wet method, desulfurizing agent is an alkaline matter, such as natural lime stone, i.e. calcium carbonate, magnesia/magnesium carbonate, NaOH/sodium carbonate, perhaps synthetic ammonia etc., desulfurization product is respectively gypsum (a calcium sulphate dihydrate crystal), epsom salt crystal, sodium sulphate or ammonium sulfate.A common ground of these methods all is that the desulfidation tail gas exhaust temperature is lower than the acid dew piont corrosion temperature, and near the water saturated water dew point temperature of waste gas, between 40～60 ℃, although at the desulfurization desulfurizing tower, is commonly referred in the desulfurizing tower SO
3Removal efficiency also very high, but because SO
3Meet water and can form acid mist, impossible 100% removes, and the tail gas after the desulfurization contains sulfuric acid mist, still shows obvious corrosion.
Eliminate the way that the desulfidation tail gas acid mist can not adopt heating, because the boiling point of sulfuric acid is greater than 320 ℃, energy that can not consume significant is heated to boiling point above sulfuric acid with tail gas.
Existing method is that the original chimney of boiler is further implemented anti-corrosion treatment, such as at original acid resistant adhesive mortar layer inside lining anti-corrosive material again, strengthens its anti-corrosion capability.For newly-built unit, the anticorrosion construction period that makes of enhancing property prolongs greatly, and the anticorrosion chimney construction cost that makes of enhancing property increases, and the difficulty that follow-up maintenance and anti-corrosion material upgrade is also very big.For old unit, if original chimney is carried out new preservative treatment, difficulty of construction is big, long construction period, and more crucial is that this production to unit or boiler can affect greatly, and lacks using value in practice.
Summary of the invention
The invention discloses a kind of tower top discharge type boiler waste gas adverse current cleaning and desulfurization method, also disclose the novel tower top discharge type boiler waste gas adverse current emission abatement integrated desulfurization tower that uses this method, especially disclose a kind of desulfurizing tower that from boiler waste gas, reclaims oxysulfide.This method makes waste gas in the inner adverse current of cleaning and desulfurization tower upwards, and purifying exhaust air is last directly from the smokejack discharging of cleaning and desulfurization tower, no longer needs through original huge smoke stack emission.Like this, chimney originally no longer needs to carry out anticorrosion enhancing to be handled, even original chimney discarded fully, has overcome the above-mentioned defective that prior art exists.
This method has also improved the waste gas purification effect by spray thrower in parallel, by the liquid foam in the twin-stage demister removal purifying exhaust air.
Major technique innovation of the present invention is that it discloses a kind of tower top discharge type contra-flow exhaust gases cleaning and desulfurization method that is furnished with packing section, spray section and bubbling segment from top to bottom.Wherein, exhaust gas inlet is arranged between spray section and the bubbling segment again, and bubbling segment is arranged on the bottom or the bottom of waste gas purification desulfurizing tower.Arrange and flow scheme design by accessory, this bubbling segment can make the washing absorption liquid carry out the circulation between inside and outside of circulation up and down, the tower body of tower body inside, former dose of washing absorption, dissolving tank, oxidation processes, absorption liquid circulating slot four big functions are accepted in performance simultaneously, greatly improve washing and absorbed former dose service efficiency, improved waste gas washing absorption efficiency.By adding different desulfurization materials to bubbling segment, bubbling segment can cooperate miscellaneous part, absorbs oxious components such as dust, NOx, HCl and HF by physics, chemistry, biological method, can also reclaim oxysulfide in a large number, produces the thiamine fertilizer byproduct.
The present invention makes waste gas in cleaning and desulfurization tower inside, and with respect to the washing absorption liquid adverse current that flows downward upwards, purifying exhaust air is last directly from the in line smoke stack emission of cleaning and desulfurization tower top, no longer needs through original smoke stack emission.Therefore, the in line chimney that the present invention mentions, perhaps in line chimney, perhaps in line flue, all be meant the exhaust opening and the direct member of direct connection waste gas purification desulfurizing tower to airborne release tail gas, the cleaning and desulfurization tower that this member is installed is emission purification gas directly, the original chimney that uses of discarded fully boiler or power plant.It also the multi-stage spray device by parallel connection to make washing absorption liquid high degree of dispersion be fine drop, improved the waste gas purification effect, also efficiently remove fog-like liquid in the purifying exhaust air by the two-stage demister.
With reference to accompanying drawing 1, accompanying drawing 2, tower top discharge type boiler waste gas adverse current cleaning and desulfurization method disclosed by the invention mainly comprises following processing step:
The first, waste gas enters
Contain SO
2(content is generally at 500-15000mg/Nm
3), SO
3(content is generally at 10-300mg/Nm
3), (content is generally at 100-1000mg/Nm for NOx
3), (content is generally at 10-100mg/Nm for HCl/HF
3), (content is generally at 50-500mg/Nm for dirt
3) wait pollutant, and temperature is 100-160 ℃ boiler waste gas, enters cleaning and desulfurization tower (10) from exhaust gas inlet (3), preferably adopts blast apparatus (30) that untreated waste gas is sent into cleaning and desulfurization tower (10).
The second, spray washing absorbs
After waste gas enters cleaning and desulfurization tower (10), the interior spray section (4) that is provided with of the cleaning and desulfurization tower (10) of upwards flowing through, spray the washing absorption liquid droplet counter current contacting of getting off with spray thrower, the chemical reaction in gas-liquid mass transferring and the liquid phase takes place, absorb and deviate from above pollutant from spray section (4).At spray section (4), the SO in the waste gas
2Become sulphite, SO
3Become sulfate, HCl becomes chloride, such as calcium chloride, and ammonium chloride, magnesium chloride or sodium chloride etc. are decided by diverse ways.The eliminating efficiency of these highly acid pollutants can reach 95%.The eliminating efficiency of the flyash in the waste gas (dirt) is greater than 60%-90%.Waste gas is washed the absorption liquid cold shock, and temperature is reduced to 40-60 ℃.
The 3rd, the circulation of washing absorption liquid
The washing absorption liquid is the pulpous state aqueous solution that contains alkaline desulfurizing agent, sulfate and crystalline solid thereof, and general saturated or oversaturated pulpous state aqueous solution by sulfate all.The washing absorption liquid is under the effect of circulating pump (40), at the bubbling segment (2) that is positioned at cleaning and desulfurization tower (10) bottom be positioned at and realize between the spray section (4) on the exhaust gas inlet (3) of cleaning and desulfurization tower (10) that the washing absorption liquid is inside and outside the cleaning and desulfurization tower and two circulations up and down.
The 4th, spray thrower multilayer spray in parallel
Big for unit or boiler capacity, perhaps SO in the waste gas
2The situation that concentration is high, if adopt extremely low calcium raw material (calcium method) or the magnesium raw material (magnesium method) of solubility, the cleaning solution flow will be very huge, existing pump technology is difficult to satisfy the requirement of big flow, adopts many circulating pumps (40) method in parallel usually.Especially, an all corresponding cover cleaning solution import and the cleaning solution spray thrower of each circulating pump (40).Therefore, in this case, waste gas must pass through the multi-stage spray device, enters packing section (5) again.
The 5th, the waste gas foam removal
After the waste gas upruss process spray section (4), continue upwards to enter packing section (5), purpose is to remove the drop that brings from spray section (4), or claims the liquid foam, and foam removal efficient is greater than 95%.Packing section (5) has two-layer filler, and all there is one group of water jet every layer of filler top, and in order to the attached solid of flushing foam removal filler Shang , such as gypsum, ammonium sulfate or magnesium sulfate etc. prevent to continue to accumulate the gas passage that stops up in the filler.Under the running status, the water jet operation of lower floor's filler during parking, must move water jet a period of time of upper strata filler continuously, and the water jet of preferred upper and lower layer filler moves simultaneously.
The 6th, waste gas is in line
Be called purifying exhaust air through the waste gas after the packing section (5), directly enter atmosphere, no longer enter atmosphere by former chimney from the in line chimney (7) of cat head top by purifying exhaust air outlet (6).
The 7th, oxidizing and crystallizing
From the washing absorption liquid that spray section (3) is got off, directly enter the bubbling segment (2) that is positioned at cleaning and desulfurization tower (10) bottom.In bubbling segment (2), oxidation air blowing device (20) blasts oxidation air by the air bubbler to the washing absorption liquid, the side that is arranged on bubbling segment (2) is advanced an agitator prolonged agitation, promote chemistry, the Physical Absorption effect of material in the waste gas, absorption liquid is through after the air oxidation, sulphite becomes sulfate, and separates out vitriol under the supersaturation situation.Bubbling segment (2) has also served as the function of desulfurizing agent dissolving tank.Generally speaking, fresh desulfurizing agent is such as the limestone powder slurries of granularity more than the 250-325 order, and magnesia/magnesium carbonate slurries, or liquefied ammonia/vaporous ammonia/ammoniacal liquor directly are added to bubbling segment (2), mix, dissolve, dilute with absorption liquid.Bubbling segment (2) has also served as the effect of absorption liquid circulating slot, and the absorption liquid that constantly will contain desulfurizing agent through the outer circulating pump (40) of purified treatment tower (10) is transported to spray section (2), constantly absorbs the pollutant in the waste gas, especially SO
2, return the bubbling segment (2) of purified treatment tower (10) bottom.
The 8th, the sulfate solid separates
Must constantly discharge absorption liquid from bubbling segment (20) by slip excavationg pump (50), the material that it is comprised enters the curing separable programming, for example entering follow-up sulfate solid separates and process equipment (60), to keep the content of sulfate solid in the washing absorption liquid, and make method of the present invention not produce waste water, or produce waste water seldom.
As seen from the above technical solution, the employed cleaning and desulfurization tower of tower top discharge type boiler waste gas purification sulfur method of the present invention (10) inside is provided with packing section (5), spray section (4) and bubbling segment (2) from top to bottom respectively, and be provided with in line chimney (7) in desulfurizing tower (10) tower body top, make the polluter of in cleaning and desulfurization tower (10), deviating from the boiler waste gas, especially SO
2Afterwards, cleaning of off-gas is without original boiler chimney discharging, thereby it is anticorrosion to have avoided prior art to strengthen boiler chimney, and then influences the problem of boiler or electric power ordinary production.
Particularly, tower top discharge type boiler waste gas sulfur method disclosed by the invention preferably uses following tower top discharge type boiler waste gas desulfurizing tower, and the cross section of this tower is circle, sub-circular, square or approximate square, and its novelty design also comprises:
Tower body (1);
Exhaust gas inlet (3) on the tower body (1), position between tower body (1) middle and lower part or middle and lower part to middle and upper part, preferred middle part;
Waste gas outlet (6) on the tower body (1), the position is in tower body (1) top or top, preferred top;
Be arranged on the packing section (5) in the tower body (1) between exhaust gas inlet (3) and the waste gas outlet (6);
Be arranged on the spray section (4) in the tower body (1) between exhaust gas inlet (3) and the packing section (5);
Be arranged on the bubbling segment that is positioned at tower body (1) (2) of exhaust gas inlet (3) bottom;
Packing section (5) is arranged in parallel with the corrugated plastic plate and forms, sheet spacing 20～50mm, the voidage of filler is not less than 90.0%, selected plastics are polypropylene or glass fibre enhanced polypropylene material, the thickness of plastic plate is between 1.0mm～5.0mm, preferably between 2.0mm～3.5mm;
In addition, packing section is provided with two-layer filler in (5), and all is furnished with water jet on every layer of filler;
Spray section is provided with gas distributor in (4), washing absorption liquid spray thrower and liquid wall stream baffle ring;
Be provided with the air bubbler in the bubbling segment (2) and side is advanced an agitator;
Especially, also comprise the in line chimney (7) that is arranged on the purifying exhaust air outlet (6);
The cross section of in line chimney (7) is circular, oval, square, perhaps rectangle;
The cross-sectional area of in line chimney (7) is 0.05～0.35 times of spray section (4) cross-sectional area, is 0.10～0.25 times preferably, preferably 0.125～0.15 times;
The height of in line chimney (7) is between 20～100m, preferably between 30～70m.
Description of drawings
Fig. 1 is the structural representation of tower top discharge type flue gas desulfurization tower.
Fig. 2 is the process flow diagram of tower top discharge type flue gas desulfurization method.
The specific embodiment
Referring to Fig. 1, the boiler waste gas purification discharging integrated purifying desulfurizing tower that the present invention proposes is cylindrical shape or square tower, comprising:
Tower body (1);
Be arranged on the bubbling segment that is positioned at tower body (2) of tower body (1) bottom, be provided with the air bubbler in the bubbling segment (2) and side is advanced an agitator;
Be arranged on the exhaust gas inlet (3) of tower body (1) middle part or middle and lower part;
Be arranged on the spray section that is positioned at tower body (4) of tower body (1) middle and upper part, spray section is provided with gas distributor in (4), two groups of absorption liquid spray throwers and liquid wall stream baffle ring;
The packing section that is positioned at tower body (5) on tower body (1) top is set, two sections fillers are set in the packing section (5), all be furnished with water jet on every section filler;
Be arranged on the purifying exhaust air outlet (6) at tower body (1) top;
Be arranged on the in line chimney (7) of purifying exhaust air outlet (6) top, the cross-sectional area of in line chimney (7) is circular, and to its exhaust outlet, cross-sectional area constantly reduces from its air inlet, is reduced to 0.125 times with the ratio of the cross-sectional area of spray section (4) from 0.25;
The height of in line chimney is 50 meters.
A kind of countercurrent direct purifies and contains SO
2The method of the boiler waste gas of pernicious gas, referring to Fig. 2, its concrete technical flow design is as follows:
Blast apparatus (30) is containing SO
25000mg/Nm
3, SO
350mg/Nm
3, NOx 500mg/Nm
3, HCl and HF content 30mg/Nm
3, dust content 100mg/Nm
3Pollutant, and temperature is 135 ℃ the former waste gas of boiler, blasts the incorporate purifying column of emission abatement (10) from exhaust gas inlet (3);
Desulfurization material is liquefaction synthetic ammonia, and the washing absorption liquid of circulation is the ammonium sulfate of sulfur acid crystalline ammonium solid, the ammonium chloride pulpous state aqueous solution, and this circulating absorption solution also contains the flyash that washs from waste gas;
The washing absorption liquid under the effect of circulating pump (40), between the bubbling segment (2) of purifying column (10), spray section (4), realize tower body (1) up and down, inside and outside two circulations of tower body (1);
After waste gas enters the tower body (1) of purifying column (10), the interior spray section (4) that is provided with of the tower of upwards flowing through, in spray section, two-stage cleaning solution spray thrower continues spray (all corresponding circulating pump separately of each cleaning solution spray thrower, corresponding cleaning solution import separately), the SO in the waste gas
2Become ammonium sulfite.Waste gas is washed the absorption liquid cold shock, and temperature is reduced to 50 ℃;
After the waste gas upruss process spray section (4), continue upwards to enter packing section (5);
Packing section (5) has two-layer filler, and all there is one group of water jet every layer of filler top;
Under the continuous running status of off-gas cleaning equipment, the water jet continuous service of lower floor's filler; During parking, the water jet of upper strata filler operation 3 minutes;
The method of operation of water jet and the time liquid level with the bubbling segment (2) of tower bottom is that benchmark is regulated, and when liquid level is lower than the setting liquid level, opens water jet, has both washed the demist packing layer, replenishes fresh water (FW) to absorption tower (10) again;
Directly enter atmosphere through the waste gas after the packing section (5) by purifying exhaust air outlet (6) from line chimney (7);
The washing absorption liquid that gets off from spray section (4), directly enter the bubbling segment (2) that is positioned at purifying column (10) bottom, in bubbling segment (2), oxidation air blowing device (20) blasts oxidation air by the air bubbler to absorption liquid, the side that is arranged on bubbling segment (2) is advanced an agitator prolonged agitation, promote the chemistry of material in the waste gas, the Physical Absorption effect, absorption liquid is through after the air oxidation, ammonium sulfite becomes ammonium sulfate, and under the supersaturation situation, separate out ammonia sulfate crystal, the ammonium sulfate solids product is sent into Separation of Solid and Liquid by slip excavationg pump (50), drying and packaging facilities (60) obtain the ammonium sulfate solids product;
Remaining liquid behind the separating solids for containing the supersaturated solution of ammonium sulfate, is called mother liquor, is back to the bubbling segment (2) of purifying column (10) bottom, further by the ammonium sulfate supersaturation that newly absorbs and oxidation obtains, and is recrystallised to solid ammonium sulfate;
Desulfurization material, liquefied ammonia, the desulfurization material import from the tower body (1) of the bubbling segment (2) that is positioned at purifying column (10) bottom directly enters purifying column (10), to guarantee to absorb continuously the sour gas in the waste gas, comprise oxysulfide, hydrogen halides, nitrogen oxide etc., especially SO
2, obtain corresponding ammonium salt at last.
Claims (10)
1, a kind of tower top discharge type flue gas desulfurization tower is characterized in that, described desulfurization tower body inside is disposed with packing section, spray section and bubbling segment from top to bottom, and is provided with exhaust gas inlet between described spray section and the described bubbling segment.
2, tower top discharge type flue gas desulfurization tower according to claim 1 is characterized in that, described desulfurization tower body top is provided with the in line chimney of an emission purification waste gas, and the height of described in line chimney is between 20～100m, between preferred 30～70m.
3, tower top discharge type flue gas desulfurization tower according to claim 2 is characterized in that, the shape of cross section of described exhuast gas desulfurization tower body is circle, sub-circular, square or squarish.
4, tower top discharge type flue gas desulfurization tower according to claim 2, it is characterized in that, described packing section is arranged in parallel by the corrugated plastic plate and forms, sheet spacing 20～50mm, selected plastics are polypropylene or glass fiber reinforced polypropylene material, the thickness of plastic plate is between 1.0mm～5.0mm, preferably between 2.0mm～3.5mm.
5, tower top discharge type flue gas desulfurization tower according to claim 4 is characterized in that, is provided with upper and lower two-layer filler in the described packing section, all is furnished with water jet on every layer of filler.
6, a kind of tower top discharge type flue gas desulfurization method, it is characterized in that, former waste gas enters the exhuast gas desulfurization tower body from exhaust gas inlet, described former waste gas is inner upwards mobile at described exhuast gas desulfurization tower body, with respect to described spray section spray and under washing absorption liquid adverse current, pass through spray section and packing section successively, enter in line chimney from the waste gas outlet that is arranged on cat head and enter atmosphere, the washing absorption liquid then from spray section to falling into bubbling segment.
7, tower top discharge type flue gas desulfurization method according to claim 6 is characterized in that, described bubbling segment is provided with the air bubbler and side is advanced an agitator.
8, tower top discharge type flue gas desulfurization method according to claim 6, it is characterized in that, the tower body of described bubbling segment is provided with a plurality of material inlets or outlet, comprises that at least oxidation air import, washing absorption liquid go the mother liquor backflow import after outlet of circulating pump, tower body reclaim solid product outward, the overflow outlet of control liquid level.
9, tower top discharge type flue gas desulfurization method according to claim 6 is characterized in that, described exhaust gas inlet is positioned at the middle part or the middle and lower part of described exhuast gas desulfurization Tata body, is preferably placed at the middle part of described exhuast gas desulfurization Tata body.
10, tower top discharge type flue gas desulfurization method according to claim 6 is characterized in that, the exhaust gas inlet of described in line chimney is positioned at the top or the top of described exhuast gas desulfurization tower body, is preferably placed at the top of described exhuast gas desulfurization tower body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100335989A CN101306318A (en) | 2008-02-14 | 2008-02-14 | Tower top discharge type flue gas desulfurization method and desulfurization tower |
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|---|---|---|---|
| CNA2008100335989A CN101306318A (en) | 2008-02-14 | 2008-02-14 | Tower top discharge type flue gas desulfurization method and desulfurization tower |
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|---|---|
| CN101306318A true CN101306318A (en) | 2008-11-19 |
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ID=40123129
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|---|---|---|---|
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341274A (en) * | 2013-07-10 | 2013-10-09 | 北京国电龙源环保工程有限公司 | Device and method for moisture recovery and gypsum rain control in wet desulphurization flue gas of thermal power plant |
| CN104667721A (en) * | 2013-11-26 | 2015-06-03 | 上海交通大学 | Tower top discharge-type desulphurization method and desulfurization tower using the same |
| CN105457480A (en) * | 2016-01-19 | 2016-04-06 | 中国矿业大学 | Device and method for simultaneously removing sulfur and mercury through paper-pulping black liquor |
| CN106823753A (en) * | 2017-03-30 | 2017-06-13 | 贵州诺威施生物工程有限公司 | Desulfurizing tower and desulfurization recovery system |
| CN107101218A (en) * | 2017-03-17 | 2017-08-29 | 清华大学 | The compact flue gas depth waste-heat recovery device of efficient low-resistance |
| CN110833736A (en) * | 2019-11-26 | 2020-02-25 | 江西晶昊盐化有限公司 | Parallel pretreatment type two-stage wet dust removal method and application thereof |
| CN111871180A (en) * | 2020-07-20 | 2020-11-03 | 莱西市蔚来设计中心 | Waste gas desulfurization and denitrification equipment |
| CN112808000A (en) * | 2021-01-27 | 2021-05-18 | 山东佩森环保科技有限公司 | Square desulfurizing tower and method |
-
2008
- 2008-02-14 CN CNA2008100335989A patent/CN101306318A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341274A (en) * | 2013-07-10 | 2013-10-09 | 北京国电龙源环保工程有限公司 | Device and method for moisture recovery and gypsum rain control in wet desulphurization flue gas of thermal power plant |
| CN103341274B (en) * | 2013-07-10 | 2016-03-02 | 北京国电龙源环保工程有限公司 | In heat-engine plant wet desulfurization fume, moisture reclaims and gypsum rain controlling device and method |
| CN104667721A (en) * | 2013-11-26 | 2015-06-03 | 上海交通大学 | Tower top discharge-type desulphurization method and desulfurization tower using the same |
| CN105457480A (en) * | 2016-01-19 | 2016-04-06 | 中国矿业大学 | Device and method for simultaneously removing sulfur and mercury through paper-pulping black liquor |
| CN107101218A (en) * | 2017-03-17 | 2017-08-29 | 清华大学 | The compact flue gas depth waste-heat recovery device of efficient low-resistance |
| CN106823753A (en) * | 2017-03-30 | 2017-06-13 | 贵州诺威施生物工程有限公司 | Desulfurizing tower and desulfurization recovery system |
| CN110833736A (en) * | 2019-11-26 | 2020-02-25 | 江西晶昊盐化有限公司 | Parallel pretreatment type two-stage wet dust removal method and application thereof |
| CN111871180A (en) * | 2020-07-20 | 2020-11-03 | 莱西市蔚来设计中心 | Waste gas desulfurization and denitrification equipment |
| CN112808000A (en) * | 2021-01-27 | 2021-05-18 | 山东佩森环保科技有限公司 | Square desulfurizing tower and method |
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Open date: 20081119 |