CN201179413Y - Column top discharge type flue gas desulfurization column equipped with material filling segment - Google Patents

Column top discharge type flue gas desulfurization column equipped with material filling segment Download PDF

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Publication number
CN201179413Y
CN201179413Y CNU2008200554835U CN200820055483U CN201179413Y CN 201179413 Y CN201179413 Y CN 201179413Y CN U2008200554835 U CNU2008200554835 U CN U2008200554835U CN 200820055483 U CN200820055483 U CN 200820055483U CN 201179413 Y CN201179413 Y CN 201179413Y
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smoke
desulfurizing tower
tower
nozzle
tower body
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Expired - Fee Related
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CNU2008200554835U
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Chinese (zh)
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娄爱娟
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Abstract

The utility model relates to a tower top exhaustion type smoke desulfurizing tower with a filling section. The smoke desulfurizing tower comprises a tower body, a smoke inlet and a smoke outlet which are arranged on the tower body, and an upright chimney arranged above the smoke outlet. After the smoke is desulfurized and purified in the desulfurizing tower body, especially after the oxysulfide in the smoke is recovered for producing sulfate products, the smoke can be directly exhausted from the upright chimney. The smoke desulfurizing tower is innovatively characterized in that the inside of the tower body is provided with the filling section which is used for removing liquid foams carried in the smoke with high efficiency so as to ensure the exhaustion index of the smoke purification and particularly protects the upright chimney from forming scale, namely, the filling section is also a defoamer. The design has the advantage that the defoamer is coupled in the tower top exhaustion type smoke desulfurizing tower, thereby simplifying the technical process, saving the occupation area and the investment.

Description

A kind of tower top discharge type flue gas desulfurization tower that is provided with packing section
Technical field
The utility model relates to a kind of tower top discharge type flue gas desulfurization emission abatement integration apparatus that is provided with packing section, relate in particular to and from flue gas, reclaim the desulfurizing tower that oxysulfide is produced useful products, belong to electric power, metallurgy, environmental protection and chemical technology field, especially be fit to the flue gas desulfurization technique field.
Background technology
With coal or oil is that a large amount of boiler flues are discharged in the thermal power plant of fuel, directly arranges to atmosphere through chimney.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 flue gas 3Gas makes flue gas show acid dew piont corrosion.The acid dew point of flue gas is with SO in the flue gas 3Increase and increase with moisture content, generally between 100~150 ℃.In order to ensure not occurring acid dew piont corrosion in the fume emission process, from the steam generator system outlet, the flue-gas temperature 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 flue gas.
Along with environmental requirement is more and more stricter, power plant or boiler all need to install flue gas desulfur device, and the flue gas desulfurization technique 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 flue gas, between 40~60 ℃, although at desulphurization plant, 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.
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 utility model technical issues that need to address are to disclose a kind of novel tower top discharge type flue gas desulfurization discharging integration apparatus that is provided with packing section, especially disclose a kind of desulfurizing tower that reclaims oxysulfide from flue gas.It gas cleaning after, directly the upright chimney discharging that connects from the exhanst gas outlet of desulfurizing tower does not need again through original smoke stack emission flue gas.Therefore, the upright chimney that the utility model is mentioned, perhaps in line chimney, perhaps in line chimney, perhaps in line flue is exactly the exhanst gas outlet that directly is connected fume desulfurizing tower, direct member to airborne release tail gas.The desulfurizing tower that this member is installed is emission purification gas directly.Like this, chimney originally no longer needs to carry out anticorrosion enhancing to be handled, even original chimney discarded fully, overcome the above-mentioned defective that prior art exists, and its energy consumption is low, the purification efficiency height.
Essence of the present utility model also is; be provided with packing section in desulfurizing tower inside; in order to the liquid foam of being carried secretly in the flue gas of efficient removal through absorption liquid spray washing and absorption cleaning; to guarantee to purify the discharge index of flue gas; especially protect non-scaling in the upright chimney that discharges flue gas, therefore, the major function of this packing section is foam removal; or demist, also can be described as demister or demister.The advantage of this design is that coupling is provided with demister in tower top discharge type desulfurization tower body, has simplified technological process, makes equipment more compact, has saved floor space, also can reduce investment outlay.
Particularly, the disclosed fume desulfurizing tower of the utility model is meant as having the tower top discharge type flue gas desulfurization tower of packing section, is cylindrical shape or square tower, and its novelty design also comprises:
Tower body;
Gas approach on the tower body, position between tower body middle and lower part or middle and lower part to middle and upper part, preferred middle part;
Exhanst gas outlet on the tower body, the position is in tower body top or top, preferred top;
Be arranged on the packing section in the tower body between gas approach and the exhanst gas outlet;
Be arranged on the spray section in the tower body between gas approach and the packing section;
Be arranged on the bubbling segment that is positioned at tower body of gas approach bottom;
Be arranged on and purify on the exhanst gas outlet, and the upright chimney that directly is connected with exhanst gas outlet; And,
The flow area of the gas approach on the described tower body is a rectangle, and is perhaps approximate rectangular, and the ratio on the minor face of described rectangle and long limit is between 0.25-0.5;
Be provided with flue gas distributor in the spray section, absorption liquid spray thrower and liquid wall stream baffle plate;
Be provided with air bubbler and side in the bubbling segment and advance an agitator;
The cross section of upright chimney be circular, ellipse, square, perhaps rectangle,
The cross-sectional area of upright chimney is 0.10~0.25 times of tower body cross-sectional area, preferably between 0.125~0.175m;
The height of upright chimney is between 20~100m, preferably between 30~70m;
Its inventive features also is,
Described packing section comprises two-layer filler, the below of packing layer or below are provided with fresh water (FW) rinse spray device, spray thrower comprises distributor pipe and nozzle, distributor pipe is connected with nozzle, distributor pipe is divided into to be responsible for and arm, the person in charge is connected with arm, and the person in charge's internal diameter is 0.1~0.3m, and the internal diameter of arm is 0.05~0.15mm;
Described nozzle quantity is, on the cross section of described tower body, arranges 1 nozzle for per 0.5~2.0 square metre, and the spout internal diameter of nozzle is 5~20mm, is preferably 7~12mm;
Described packing layer uses the corrugated plastic plate to be arranged in parallel and forms, sheet spacing 10~50mm is preferably 20~35mm, and the thickness of described plate is 1.0mm~5.0mm, preferred 2.0mm~3.5mm, and described plastic plate adopts the plastic production of glass fibre enhancing.
The disclosed smoke eliminator of the utility model is operated in the following manner:
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 ℃ flue gas, enters desulfurizing tower from gas approach, the spray section of upwards flowing through, with spray the washing absorption liquid counter current contacting of getting off from spray thrower, the chemical reaction in mass transfer, heat transfer and the liquid phase of solution-air two-phase takes place, deviate from above pollutant.In spray section, the SO in the flue gas 2Become sulphite, SO 3Become sulfate, HCl becomes chloride.The eliminating efficiency of these highly acid pollutants can reach 95%.The eliminating efficiency of the flyash in the flue gas (dirt) is greater than 60%-90%.Flue gas is washed the absorption liquid cold shock, and temperature is reduced to 40-60 ℃.
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 mixtures by sulfate all.
Big for unit or boiler capacity, perhaps SO in the flue 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 the method for many circulating pump parallel connections usually.Especially, an all corresponding cover cleaning solution import and the cleaning solution spray thrower of each circulating pump.Therefore, in this case, flue gas must enter packing section again through too much group of spray thrower.
Flue gas continues upwards to enter packing section from spray section, and purpose is to remove the drop that brings from spray section, or claims the liquid foam, and foam removal efficient is greater than 95%.Packing section 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 1~5 minute simultaneously.
Be called the purification flue gas through the flue gas after the packing section, directly enter atmosphere from upright chimney by purifying exhanst gas outlet.
From the washing absorption liquid that spray section is got off, directly enter the bubbling segment that is positioned at the desulfurizing tower bottom.At bubbling segment, absorption liquid is through after the air oxidation, and sulphite becomes sulfate, and separates out vitriol under the supersaturation situation.Bubbling segment 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, mix, dissolve, dilute with absorption liquid.Bubbling segment 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 of desulfurizing tower is transported to spray section, constantly absorbs the pollutant in the flue gas, especially SO 2, return the bubbling segment of desulfurizing tower bottom.
Simultaneously also must constantly get rid of absorption liquid, enter follow-up sulfate consubstantiality and separate and process equipment, to obtain desulfurization product, solid sulfate salt from bubbling segment.
By above-mentioned disclosed technical scheme as seen, the flue gas desulfurization emission abatement integrated desulfurization tower that is provided with packing section of the present utility model has comprised four parts: be respectively bubbling segment, spray section, packing section and upright chimney from bottom to up, make at desulfurizing tower and deviate from polluter in the flue 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 do not influence the problem of boiler or electric power ordinary production yet, also saved investment, shorten the duration, and can under lower energy consumption, obtain higher desulfurization and purification efficiency.
Description of drawings
Fig. 1 is the structural representation that is provided with the tower top discharge type flue gas desulfurization tower of packing section.
The specific embodiment
Referring to Fig. 1, tower top discharge type flue gas desulfurization tower of the present utility model is columnar 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 gas approach (3) at tower body (1) middle part, the flow area of gas approach (3) is a rectangle, and the ratio on the minor face of described rectangle and long limit is 0.35; 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 flue gas distributor in (4), absorption liquid spray thrower and liquid wall stream baffle plate, and described absorption liquid spray thrower is 2 groups; Be arranged on the purification exhanst gas outlet (6) at tower body (1) top;
Be arranged on and purify on the exhanst gas outlet (6), and the upright chimney (7) that directly is connected with exhanst gas outlet (6), the cross-sectional area of upright chimney (7) is circular, and from its air inlet to its exhaust outlet, cross-sectional area constantly reduces, be reduced to 0.125 times with the ratio of tower body cross-sectional area from 0.25, the height of upright chimney (7) is 55 meters;
Described packing section comprises two-layer filler, the below of packing layer and top all are provided with fresh water (FW) rinse spray device, spray thrower comprises distributor pipe and nozzle, distributor pipe is connected with nozzle, distributor pipe is divided into to be responsible for and arm, the person in charge is connected with arm, and the person in charge's internal diameter is 0.2m, and the internal diameter of arm is 0.065mm; Nozzle quantity is, on the cross section of described tower body, arranges 1 nozzle for per 1.0 square metres, and the spout internal diameter of nozzle is 8mm; Packing layer uses the corrugated plastic plate to be arranged in parallel and forms, sheet spacing 25mm, and sheet is 3.0mm, adopts glass fibre enhanced polypropylene plastic production.

Claims (10)

1, a kind of tower top discharge type flue gas desulfurization tower that is provided with packing section, comprise tower body, gas approach on the tower body and exhanst gas outlet, and the upright chimney of exhanst gas outlet connection, it is characterized in that, described tower body inside is provided with packing section, and in the tower body of described packing section between described gas approach and exhanst gas outlet.
2, fume desulfurizing tower according to claim 1 is characterized in that, described packing section comprises two-layer filler.
3, fume desulfurizing tower according to claim 2 is characterized in that, the below of described packing layer is provided with fresh water (FW) rinse spray device.
4, fume desulfurizing tower according to claim 2 is characterized in that, the top of described packing layer is provided with fresh water (FW) rinse spray device.
5, according to claim 3 or 4 described fume desulfurizing towers, it is characterized in that described spray thrower comprises distributor pipe and nozzle, distributor pipe is connected with nozzle, and nozzle is a spiral nozzle.
6, fume desulfurizing tower according to claim 5 is characterized in that, described distributor pipe is divided into to be responsible for and arm, is responsible for to be connected with arm, and the person in charge's internal diameter is 0.1~0.3m, and the internal diameter of arm is 0.05~0.15mm.
7, fume desulfurizing tower according to claim 5 is characterized in that, the quantity of described nozzle is on the cross section of described tower body, to arrange 1 nozzle for per 0.5~2.0 square metre.
8, fume desulfurizing tower according to claim 5 is characterized in that, the spout internal diameter of described nozzle is 5~20mm.
9, fume desulfurizing tower according to claim 2 is characterized in that, described packing layer uses the corrugated plastic plate to be arranged in parallel and forms, sheet spacing 10~50mm, and the thickness of described plate is 2.0mm~3.5mm.
10, fume desulfurizing tower according to claim 9 is characterized in that, the plastic production that described plastic plate adopts glass fibre to strengthen.
CNU2008200554835U 2008-02-14 2008-02-14 Column top discharge type flue gas desulfurization column equipped with material filling segment Expired - Fee Related CN201179413Y (en)

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Application Number Priority Date Filing Date Title
CNU2008200554835U CN201179413Y (en) 2008-02-14 2008-02-14 Column top discharge type flue gas desulfurization column equipped with material filling segment

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101865475A (en) * 2010-06-07 2010-10-20 肖成三 Multifunctional chimney
CN106237823A (en) * 2016-08-31 2016-12-21 山东万福达化工有限公司 A kind of efficiently tail gas desulfurization device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101865475A (en) * 2010-06-07 2010-10-20 肖成三 Multifunctional chimney
CN106237823A (en) * 2016-08-31 2016-12-21 山东万福达化工有限公司 A kind of efficiently tail gas desulfurization device
CN106237823B (en) * 2016-08-31 2022-03-01 山东万福达化工有限公司 High-efficient tail gas desulphurization unit

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C14 Grant of patent or utility model
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract

Assignee: Shenchuan Environment Protection Science and Technology Co., Ltd., Shanghai

Assignor: Lou Aijuan

Contract fulfillment period: 2009.2.8 to 2011.2.8

Contract record no.: 2009310000011

Denomination of utility model: Column top discharge type flue gas desulfurization column equipped with material filling segment

Granted publication date: 20090114

License type: Exclusive license

Record date: 20090225

LIC Patent licence contract for exploitation submitted for record

Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.2.8 TO 2011.2.8; CHANGE OF CONTRACT

Name of requester: SHENCHUAN ENVIRONMENT PROTECTION TECH CO., LTD., S

Effective date: 20090225

EE01 Entry into force of recordation of patent licensing contract

Assignee: Shenchuan Environment Protection Science and Technology Co., Ltd., Shanghai

Assignor: Lou Aijuan

Contract fulfillment period: 2009.4.9 to 2016.4.9

Contract record no.: 2009310000102

Denomination of utility model: Column top discharge type flue gas desulfurization column equipped with material filling segment

Granted publication date: 20090114

License type: Exclusive license

Record date: 20090619

LIC Patent licence contract for exploitation submitted for record

Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.4.9 TO 2016.4.9; CHANGE OF CONTRACT

Name of requester: SHENCHUAN ENVIRONMENT PROTECTION TECH CO., LTD., S

Effective date: 20090619

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090114

Termination date: 20160214