CN201454396U - Spray-type desulfurization tower with integrated absorption, oxidation, crystallization, mist elimination and temperature reduction - Google Patents

Spray-type desulfurization tower with integrated absorption, oxidation, crystallization, mist elimination and temperature reduction Download PDF

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Publication number
CN201454396U
CN201454396U CN 200920079250 CN200920079250U CN201454396U CN 201454396 U CN201454396 U CN 201454396U CN 200920079250 CN200920079250 CN 200920079250 CN 200920079250 U CN200920079250 U CN 200920079250U CN 201454396 U CN201454396 U CN 201454396U
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China
Prior art keywords
oxidation
crystallization
coupled
desulfurizing tower
flue gas
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CN 200920079250
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Chinese (zh)
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刘盛余
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成都信息工程学院
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Abstract

The utility model relates to a spray-type desulfurization tower, and discloses a wet flue gas desulfurization tower which adopts limestone, lime, ammonia (including liquid ammonia or ammonia water) or carbide slag as the raw material and integrates absorption, oxidation, crystallization, mist elimination and temperature reduction into a whole. An SO2 absorption section and a flue gas temperature reduction coupling section 2 are arranged at the upper part of a desulfurization tower 1; a defogging section 5 is arranged on the SO2 absorption section and the flue gas temperature reduction coupling section 2; an oxidation and crystallization coupling section 6 is arranged below the SO2 absorption section and the flue gas temperature reduction coupling section 2; and a clear liquid region 63 and a ropy liquid region 64 are arranged in the oxidation and crystallization coupling section 6. The spray-type desulfurization tower is unique in that both the function regions of humidification and temperature reduction of hot flue gas and absorption of SO2 are located in one region, thereby improving the availability of the desulfurization tower, and saving the investment; moreover, both the functions of oxidation and crystallization are coupled and completed in a region at the lower part of the desulfurization tower for simultaneous oxidation and crystallization, thereby eventually forming the multifunctional desulfurization tower that integrates the absorption, oxidation, crystallization, mist elimination and temperature reduction into a whole, and saving the investment, occupied area and energy consumption consequently.

Description

Collection absorption, oxidation, crystallization, demist and the incorporate spray desulfurizing tower of cooling

Technical field

The present utility model relates to a kind of spray desulfurizing tower, be primarily aimed at thermal power plant, Industrial Boiler and other sulfur dioxide that contains the flue gas of sulfur dioxide and deviate from (Flue Gas Desulfurizaiton, FGD), especially adopting lime stone, lime and ammonia (comprising liquefied ammonia or ammoniacal liquor) or carbide slag is the absorption of raw material collection, oxidation, crystallization, demist and the incorporate wet flue gas desulfurization tower of cooling.

Background technology

When containing sulfur mineral and fuel combustion, contain SO in the discharged flue gas 2Exemplary is to be the boiler smoke and coloured and sintering device flue gas ferrous metal smelting of fuel with coal and oil (generally being heavy oil).Flue gas desulfurization is concluded at present and is got up to have three major types: 1. desulfurization before the burning, such as washing desulfurization, coking desulfurization and biological desulphurization; 2. desulfurization, i.e. desulfuration in furnace in burning; 3. burning back flue gas desulfurization.At present, flue gas desulfurization is the desulfur technology of unique in the world large-scale commercial applications application.Flue gas desulfurization technique is various, and according to the absorbent difference that adopts, smoke-gas wet desulfurization comprises: 1. with CaO/CaCO 3Calcium method for the basis; 2. based on the magnesium method of MgO; 3. with Na 2CO 3Sodium method for the basis; 4. with NH 3Ammonia process for the basis; 5. based on organic alkaline process of organic base etc.

Wet process of FGD technology major advantage is: (1) desulfuration efficiency height; (2) absorbent utilization rate height, the lime stone utilization rate generally reaches more than 95%; (3) operation rate height generally reaches 95%.

But wet process of FGD technological investment height, the operating cost height wherein mainly is the cost cost height of desulfurizing tower aspect investment.At present both at home and abroad general wet process of FGD all is that desulfurization is absorbed, oxidation, crystallization, cooling, workshop sections such as demist partly are separated into several reaction towers, cause the one-time investment height like this, take up an area of wide, the operating cost height.

Summary of the invention

The purpose of this utility model is in order to solve the prior art problem, to design a kind of multi-functional desulfurizing tower that integrates absorption, oxidation, crystallization, demist and lower the temperature, will absorbing to overcome existing wet flue gas desulfurization tower, oxidation, crystallization, cooling, workshop sections such as demist partly are separated into several reaction towers, cause the one-time investment height like this, take up an area of widely, the shortcoming and defect that operating cost is high provides a kind of energy consumption low, reliable, the multifunctional novel wet flue gas desulfurizer.

A kind of collection absorption, oxidation, crystallization, demist and the incorporate spray desulfurizing tower of cooling are raw material with lime stone, lime, liquefied ammonia, ammoniacal liquor or carbide slag, comprising:

Top is provided with SO 2Absorber portion and flue gas cool-down coupled section;

At described SO 2Absorber portion and flue gas cool-down coupled section comprise the absorption liquid spray atomizing member that is connected with desulfurizing tower housing inlet;

At SO 2On absorber portion and the flue gas cool-down coupled section demist section is set, the demist section adopts the efficient demister of secondary wave card, and is with automatic cleaning spraying device, and fresh water (FW) is sent into spray equipment with water by inlet by pump;

At SO 2The below of absorber portion and flue gas cool-down coupled section is provided with oxidation and crystallization coupled section;

Top in the top of desulfurizing tower demist section is provided with exhanst gas outlet, and the clean flue gas of generation is discharged from exhanst gas outlet;

At SO 2Be provided with smoke inlet between absorber portion and flue gas cool-down coupled section and oxidation and the crystallization coupled section;

The demarcation strip that constitutes by straight plate and flap of a side in oxidation and crystallization coupled section, said flap and desulfurizing tower inner walls are tightly connected, straight plate inserts in oxidation and the crystallization coupled section, is clear liquid area between straight plate and the desulfurizing tower inner walls, and straight plate bottom is the magma district; Clear liquid area and magma district play the sieving actoion of crystalline solid, make bulky grain concentrate on the magma district, and fine grained concentrates on clear liquid area;

On straight magma district, plate bottom, desulfurizing tower housing, calcium sulfate or ammonium sulfate slurry outlet are set;

The circulating absorption solution outlet is set on clear liquid area, desulfurizing tower housing;

Be provided with the absorbent slurry inlet in oxidation and crystallization coupled section, flap top;

Be provided with the compressed-air actuated compressed air inlet of drum in oxidation and crystallization coupled section middle part.

Said absorption liquid spray atomizing member is a spiral nozzle.

The internal diameter of absorption liquid spray atomizing member is 10-100mm.

The top of oxidation and crystallized region is provided with the sieve plate or the screen of perforate.

Be provided with the air sparger that is connected with air intake in oxidation with crystallization coupled section middle part, with even conveying oxidation air, improve oxygenation efficiency, and the pressure of oxidation air is brought up to 0.09-0.15MPa.

Be provided with agitating device in oxidation and crystallization coupled section bottom.

Unique distinction of the present utility model is: the humidifying cooling of hot flue gas and SO 2Two functional areas of absorption in a zone, improved the utilization rate of desulfurizing tower, can reduce investment outlay; In addition oxidation and two functions of crystallization are coupling in zone, desulfurizing tower bottom and finish, oxidation and crystallization are carried out simultaneously, make full use of the time of staying that oxidation reactor needs, also provide enough time of staying for crystallization, not only reduce investment outlay, save floor occupying area, also energy efficient.

Because the combination of above-mentioned functions has finally formed a multi-functional desulfurizing tower that integrates absorption, oxidation, crystallization, demist and lower the temperature.

Effect of the present utility model:

Adopt the multi-functional desulfurizing tower that integrates absorption, oxidation, crystallization, demist and lower the temperature of the present utility model to handle, the purifying rate of major pollutants can reach in the flue gas: SO 2: 90-99.5%; SO 3: 60-80%; HCl:90-100%; HF:95-100%; NO X: 10-30%; Dirt: 70-85%.Therefore desulfurizing tower of the present utility model has flue gas cool-down, gas cleaning, SO 2Absorb, calcium sulfite (ammonium sulfite) oxidation, calcium sulfate (ammonium sulfate) crystallization, dedusting, functions such as demist, and have the desulfuration efficiency height, absorbent utilization rate height, energy-conservation, take up an area of for a short time, non-secondary pollution has industrial prospect greatly.

Description of drawings

Fig. 1 is the spray desulfurizing tower structural representation that integrates absorption, oxidation, crystallization, demist and lower the temperature

The specific embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the spray desulfurizing tower that integrates absorption, oxidation, crystallization, demist and lower the temperature of the present utility model is elaborated.

Referring to Fig. 1, Fig. 1 is the spray desulfurizing tower structural representation that integrates absorption, oxidation, crystallization, demist and lower the temperature.

Desulfurizing tower 1 is by reverse-flow spray design.Top in desulfurizing tower 1 is provided with SO 2Absorber portion and flue gas cool-down coupled section 2; At described SO 2Absorber portion and flue gas cool-down coupled section 2 comprise the absorption liquid spray atomizing member that is connected with desulfurizing tower housing inlet 3, said absorption liquid spray atomizing member preferred nozzle 4, said nozzle 4 preferred spiral nozzles, promptly in nozzle 4, be provided with screw thread, nozzle 4 internal diameters are 10-100mm, the absorption liquid measure decision that the quantity of nozzle 4 can be handled as required, each nozzle liquid spray flux 10-100m 3/ h, the nozzle material is the abrasion-proof corrosion-proof corrosion material, comprises SiC, pottery, polyurethane, poly-tetrafluoro and ultra-high molecular weight polyethylene etc., wherein preferred SiC, pottery, polyurethane. the quantity of nozzle is by each nozzle liquid spray flux 10-100m 3/ h, nozzle inside diameter 10-100mm determines.The sprinkle density of absorption liquid is at 10-200m 3/ m 2/ h, preferred 20-80m 3/ m 2Between/the h;

At SO 2On absorber portion and the flue gas cool-down coupled section 2 demist section 5 is set, demist section 5 adopts the efficient demister of secondary wave card, and be with automatic cleaning spraying device 51, fresh water (FW) 52 is sent into spray equipment 51 with water by entering the mouth by pump (not shown), and the flushing water and the fume washing water of demister is provided.Before desulfurizing tower 1 did not enter flue gas, this spray equipment 51 will be filled with water in desulfurizing tower 1 oxidation and the crystallization coupled section 6, was called the absorption circulation fluid after waiting to need the flue gas of desulfurization to enter desulfurizing tower 1;

Be provided with exhanst gas outlet 11 at the top of desulfurizing tower 1 (being the top of demist section 5), the clean flue gas of generation is discharged from exhanst gas outlet 11;

At SO 2The below of absorber portion and flue gas cool-down coupled section 2 is provided with oxidation and crystallization coupled section 6;

At SO 2Be provided with smoke inlet 12 between absorber portion and flue gas cool-down coupled section 2 and oxidation and the crystallization coupled section 6, the flue gas of supply and demand desulfurization enters in the desulfurizing tower 1, flue gas to be desulfurization is regulated through baffle door (not shown), sends in the desulfurizing tower 1 after booster fan (not shown) supercharging;

The demarcation strip that constitutes by straight plate 61 and flap 62 of a side in oxidation and crystallization coupled section 6, said flap 62 is tightly connected with desulfurizing tower 1 inner walls, straight plate 61 inserts in oxidation and the crystallization coupled section 6, between straight plate 61 and desulfurizing tower 1 inner walls is clear liquid area 63, and straight plate 61 bottoms are magma district 64; Clear liquid area 63 and magma district 64 play the sieving actoion of crystalline solid, make bulky grain concentrate on magma district 64, and fine grained concentrates on clear liquid area 63;

On straight magma district, plate 61 bottom 64, desulfurizing tower 1 housing calcium sulfate or ammonium sulfate slurry outlet 13 are set, and link to each other with slurry pump, slurry pump is sent calcium sulfate or ammonium sulfate slurry into subsequent treatment operation (evaporation, drying process).

Circulating absorption solution outlet 14 is set on clear liquid area 63, desulfurizing tower 1 housing;

Be provided with absorbent slurry (lime stone, lime or ammonia) inlet 16 in oxidation and crystallization coupled section 6, flap top;

Be provided with the compressed-air actuated compressed air inlet 15 of drum in oxidation and crystallization coupled section 6 middle parts; 15 are provided with the air sparger that is connected with air intake in the compressed air inlet, and the air that enters desulfurizing tower is distributed; Preferably, be provided with the sieve plate or the screen of perforate on the top of oxidation and crystallization coupled section 6, the quantity of sieve plate or screen is the 3-5 piece, oxidation and crystallization coupled section 6 are divided into the 3-5 level, the liquid that contains calcium sulfite or ammonium sulfite from top to bottom, air is from the bottom up, form adverse current, form multistage bubbling oxidation reaction device, reaching under the situation of same 90% oxygenation efficiency, the oxidation reactor volume can reduce 50-80%;

Be provided with absorbent slurry (lime stone, lime or ammonia) inlet 16 in oxidation and crystallization coupled section 6 middle parts; Absorbent slurry (lime stone, lime or ammonia) through pump, and (is controlled at the pH value: 5.0-6.0) regulate the flow that enters absorption liquid in oxidation and the crystallization coupled section 6 by the pH value that analyze to absorb circulation fluid by the slurries pond;

In oxidation and crystallization coupled section 6, take place in the oxidation crystallization to take place also.Crystallization itself also is equivalent to a chemical reaction.Therefore, multistage bubbling reactor structure also helps crystallization reaction.Increase reaction speed, improve the uniformity of crystalline solid granularity, at the bottommost of desulfurization reactor,, be provided with agitating device 8 simultaneously in oxidation and crystallization coupled section 6 bottoms in order to prevent the crystal deposition caking;

Below the simple process of describing desulfurizing tower 1 pair of smoke absorption, absorption, oxidation, crystallization, demist and cooling.

With concentration is 1000-10000mg/Nm 3, temperature is 100-150 ℃ a boiler smoke, enters flue gas cool-down district and SO from the smoke inlet 12 of desulfurizing tower 1 2Absorb coupled section 2, and contact flue gas cool-down, while SO wherein by the said absorption liquid atomization member spray absorption liquid that absorbs slurries that contains down 2Be absorbed; Flue gas leaves cooling area and SO 2After absorbing coupled section 2, arrange to chimney from exhanst gas outlet 11 through demist section 5.

Absorption liquid leaves cooling area and SO 2After absorbing coupled section 2, enter in oxidation and the crystallization coupled section 6, carry out oxidation reaction with the air that blasts from the compressed-air actuated compressed air inlet 15 of drum, the air oxidation that calcium sulfite that generates or ammonium sulfite are blasted is calcium sulfate or ammonium sulfate, carrying out along with the time, calcium sulfate or ammonium sulfate concentrations constantly increase, and meet and exceed its saturation degree.Owing to contain flyash in the absorption liquid, can be used as the nucleus of calcium sulfate or ammonium sulfate crystallization, calcium sulfate or ammonium sulfate can be separated out in crystallization.After concentration in absorption liquid surpassed to a certain degree when calcium sulfate or ammonium sulfate, calcium sulfate or ammonia sulfate crystal can steady growths.

Circulating absorption solution takes out from the circulating absorption solution outlet 14 of clear liquid area 63, carry and enter nozzle 4 after initiate absorbent slurry mixes and spray and contact through circulating pump with flue gas, absorb the SO2 in the flue gas, obtain new calcium sulfite or ammonium sulfite, enter in oxidation and the crystallization coupled section 6, there is oxidized crystallization to separate out, so constantly circulation;

Calcium sulfate or ammonium sulfate slurry are taken out from slurry outlet 13, be transported to evaporation, drying device, adopt conventional method, separated and collected solid particle wherein, absorbent slurry (lime stone, lime or the ammonia) inlet 16 that separates in back denominator liquid oxidation and the crystallization coupled section 6 is sent back in oxidation and the crystallization coupled section 6.

Claims (6)

1. collection absorption, oxidation, crystallization, demist and the incorporate spray desulfurizing tower of cooling are raw material with lime stone, lime, liquefied ammonia, ammoniacal liquor or carbide slag, it is characterized in that comprising:
Top is provided with SO 2Absorber portion and flue gas cool-down coupled section (2);
At described SO 2Absorber portion and flue gas cool-down coupled section (2) comprise the absorption liquid spray atomizing member that is connected with desulfurizing tower housing inlet (3);
At SO 2On absorber portion and the flue gas cool-down coupled section (2) demist section (5) is set, demist section (5) adopts the efficient demister of secondary wave card, and is with automatic cleaning spraying device (51), and fresh water (FW) is sent into spray equipment (51) with water by inlet (52) by pump:
At SO 2The below of absorber portion and flue gas cool-down coupled section (2) is provided with oxidation and crystallization coupled section (6);
Be provided with exhanst gas outlet (11) on the top of the top of desulfurizing tower demist section (5), the clean flue gas of generation is discharged from exhanst gas outlet;
At SO 2Be provided with smoke inlet (12) between absorber portion and flue gas cool-down coupled section (2) and oxidation and the crystallization coupled section (6);
The demarcation strip by straight plate (61) and flap (62) formation of a side in oxidation and crystallization coupled section (6), said flap (62) is tightly connected with desulfurizing tower (1) inner walls, straight plate (61) inserts in oxidation and the crystallization coupled section (6), between straight plate (61) and desulfurizing tower (1) inner walls is clear liquid area (63), and straight plate (61) bottom is magma district (64); Clear liquid area (63) and magma district (64) play the sieving actoion of crystalline solid, make bulky grain concentrate on magma district (64), and fine grained concentrates on clear liquid area (63);
On straight magma district, plate (61) bottom (64), desulfurizing tower (1) housing, calcium sulfate or ammonium sulfate slurry outlet (13) are set;
Circulating absorption solution outlet (14) is set on clear liquid area (63), desulfurizing tower (1) housing;
Be provided with absorbent slurry inlet (16) in oxidation and crystallization coupled section (6), flap top;
Be provided with drum compressed-air actuated compressed air inlet (15) in oxidation and crystallization coupled section (6) middle part.
2. collection absorption according to claim 1, oxidation, crystallization, demist and the incorporate spray desulfurizing tower of cooling is characterized in that, said absorption liquid spray atomizing member is a spiral nozzle.
3. collection absorption according to claim 1, oxidation, crystallization, demist and the incorporate spray desulfurizing tower of cooling is characterized in that, the internal diameter of absorption liquid spray atomizing member is 10-100mm.
4. collection absorption according to claim 1, oxidation, crystallization, demist and the incorporate spray desulfurizing tower of cooling is characterized in that the top of oxidation and crystallized region is provided with the sieve plate or the screen of perforate.
5. collection absorption according to claim 1, oxidation, crystallization, demist and the incorporate spray desulfurizing tower of cooling is characterized in that, are provided with the air sparger that is connected with air intake in oxidation with crystallization coupled section (6) middle part.
6. collection absorption according to claim 1, oxidation, crystallization, demist and the incorporate spray desulfurizing tower of cooling is characterized in that, are provided with agitating device in oxidation and crystallization coupled section (6) bottom.
CN 200920079250 2009-02-26 2009-02-26 Spray-type desulfurization tower with integrated absorption, oxidation, crystallization, mist elimination and temperature reduction CN201454396U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103041690A (en) * 2013-01-25 2013-04-17 上海龙净环保科技工程有限公司 Removal tower and method for collaboratively desulfurizing and removing PM2.5 (Particulate Matter 2.5) in smoke
CN104474878A (en) * 2014-12-21 2015-04-01 赵民 Double-tower double-medium energy-saving high-efficiency flue gas desulfurization dust-removal combined device
CN105289169A (en) * 2012-08-21 2016-02-03 美铝公司 Systems for removing particulate matter from a gas stream
CN107261780A (en) * 2017-08-12 2017-10-20 浙江千尧环境工程有限公司 A kind of bubble absorbing tower of wet process of FGD
CN108619872A (en) * 2017-03-24 2018-10-09 中国石油化工股份有限公司 A kind of fume desulfurizing tower and flue gas desulfurization and wastewater treatment method
CN108619885A (en) * 2017-03-24 2018-10-09 中国石油化工股份有限公司 A kind of fume desulfurizing tower and flue gas ash removal, desulfurization and wastewater treatment method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105289169A (en) * 2012-08-21 2016-02-03 美铝公司 Systems for removing particulate matter from a gas stream
CN103041690A (en) * 2013-01-25 2013-04-17 上海龙净环保科技工程有限公司 Removal tower and method for collaboratively desulfurizing and removing PM2.5 (Particulate Matter 2.5) in smoke
CN103041690B (en) * 2013-01-25 2014-10-29 上海龙净环保科技工程有限公司 Removal tower and method for collaboratively desulfurizing and removing PM2.5 (Particulate Matter 2.5) in smoke
CN104474878A (en) * 2014-12-21 2015-04-01 赵民 Double-tower double-medium energy-saving high-efficiency flue gas desulfurization dust-removal combined device
CN108619872A (en) * 2017-03-24 2018-10-09 中国石油化工股份有限公司 A kind of fume desulfurizing tower and flue gas desulfurization and wastewater treatment method
CN108619885A (en) * 2017-03-24 2018-10-09 中国石油化工股份有限公司 A kind of fume desulfurizing tower and flue gas ash removal, desulfurization and wastewater treatment method
CN108619872B (en) * 2017-03-24 2019-09-10 中国石油化工股份有限公司 A kind of fume desulfurizing tower and flue gas desulfurization and wastewater treatment method
CN107261780A (en) * 2017-08-12 2017-10-20 浙江千尧环境工程有限公司 A kind of bubble absorbing tower of wet process of FGD
CN107261780B (en) * 2017-08-12 2020-05-19 浙江千尧环境工程有限公司 Bubbling absorption tower for wet flue gas desulfurization

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