CN106110869A - A kind of method removing sulfide in flue gas - Google Patents

A kind of method removing sulfide in flue gas Download PDF

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Publication number
CN106110869A
CN106110869A CN201610778002.2A CN201610778002A CN106110869A CN 106110869 A CN106110869 A CN 106110869A CN 201610778002 A CN201610778002 A CN 201610778002A CN 106110869 A CN106110869 A CN 106110869A
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China
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flue gas
desulfurizing
gas
butylene succinate
weight
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CN201610778002.2A
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Chinese (zh)
Inventor
王良源
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温州乐享科技信息有限公司
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Priority to CN201610778002.2A priority Critical patent/CN106110869A/en
Publication of CN106110869A publication Critical patent/CN106110869A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/52Hydrogen sulfide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/81Solid phase processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

Abstract

The invention belongs to field of Environment Protection, relate to a kind of method removing sulfide in flue gas, including, by oxygen-containing gas and desulphurizer mixing, and spray in desulfurizing tower;In desulfurizing tower, flue gas contacts at 100 220 DEG C with the mixture sprayed into.The preparation method of desulfurizing agent includes: soluble iron saline solution and poly butylene succinate are mixed;In mixture, add urea liquid, be slow added into sodium bicarbonate solution and mix, until pH value reaches 6.8 7.5;By the material that obtains 120 160 DEG C, react 13 hours under the conditions of 0.10 0.20MPa, sedimentation is precipitated granule;Precipitation granule is mixed with binding agent, pore creating material, dries, then roasting in oxygen-containing atmosphere;The calcining matter obtained is put into constant temperature dipping in the poly butylene succinate of 120 200 DEG C, then dries, cool down.The desulfuration efficiency of the inventive method is higher, has more economy.

Description

A kind of method removing sulfide in flue gas
Technical field
The invention belongs to field of Environment Protection, be specifically related to a kind of method removing sulfide in flue gas.
Background technology
Coal combustion or industry manufacture in the flue gas produced often containing sulfide.Sulfide is mainly derived from coal or industry is former The sulfur material that material contains, sulfur material reacts in combustion process or industrial manufacturing process, changes into sulfide and discharges. Sulfide particularly hydrogen sulfide, sulfur dioxide etc. can frequently result in the catalyst poisoning produced in workshop section and inactivates, and Containing Sulfur The waste gas of thing directly discharges, and easily pollutes environment, produces the air problem such as haze, has a strong impact on the health of the mankind.
Desulfurizing agent is a kind of medicament for removing sulfide in flue gas.Be conducive to industry raw owing to reducing sulfide content Producing and environmental conservation, therefore researcher gives more concern for the research and development of desulfurizing agent.Current desulfurizing agent kind includes Solid base/liquid base desulfurizing agent, activated carbon desulphurization agent, molecular sieve carried metal desulfurization agent, Fe-series desulfurizing agent, manganese systems desulfurizing agent, Many composite oxide of metal desulfurizing agent etc..Studying through for many years, although desulfurizing agent kind is more and more abundanter, desulfurization performance there has also been Be greatly improved, but the Sulfur capacity of existing desulfurizing agent and desulfurization precision be the most relatively low, it is difficult to meet flue gas desulfurization to efficiency and The requirement of economy.
Still need at present a kind of economy, the efficient method removing sulfide in flue gas, with satisfied industry, civil area to cigarette The urgent needs of desulfurization.
Summary of the invention
The inventors found that a kind of method removing sulfide in flue gas, use prepared high sulfur capacity, high de- The desulfurizing agent of sulfur precision, high transverse rupture strength and bigger serface, carries out desulfurization to flue gas, substantially increases desulfuration efficiency, and And it is the most economical and the most practical.Further, the mixture of oxygen-containing gas and desulfurizing agent at high temperature carries out the desulfuration efficiency of desulfurization to flue gas Higher.
The present invention relates to a kind of method removing sulfide in flue gas, comprise the steps,
1) by oxygen-containing gas and desulphurizer mixing, and spray in desulfurizing tower;
2) in desulfurizing tower, flue gas contacts at 100-220 DEG C with the mixture sprayed into;Preferably, flue gas with spray into Mixture 100-150 DEG C, 130-180 DEG C, 160-200 DEG C, 100 DEG C, 120 DEG C, 130 DEG C, 150 DEG C, 170 DEG C, 180 DEG C or Contact at 200 DEG C;
Wherein, the preparation method of described desulfurizing agent comprises the steps:
(1) soluble iron saline solution and poly butylene succinate are mixed;In mixture, add urea liquid, then delay Slow addition sodium bicarbonate solution also mixes, until pH value reaches 6.8-7.5 (preferable ph is 7-7.5,7 or 7.5);Preferably, The mode being slowly added to is for dropwise to instill;
(2) material that step (1) is obtained 120-160 DEG C, react 1-3 hour under the conditions of 0.10-0.20MPa, sedimentation It is precipitated granule;Preferably, 120-140 DEG C, react 3 hours under 0.10-0.12MPa;Preferably, subsidence style is for standing Sedimentation;
(3) described precipitation granule is mixed with binding agent, pore creating material, dries, then roasting in oxygen-containing atmosphere;
(4) calcining matter that step (3) obtains is put into constant temperature dipping in the poly butylene succinate of 120-200 DEG C, then Dry, cool down;Preferably calcining matter is put into 120-160 DEG C, 120 DEG C, 130 DEG C, 140 DEG C, 150 DEG C, 160 DEG C, 170 DEG C, Constant temperature dipping in the poly butylene succinate of 180 DEG C, 190 DEG C or 200 DEG C.
In the course of reaction of step (2), poly butylene succinate is fused into precipitation with the FeOOH granule of generation Granule.In step (4), dipping makes poly butylene succinate and FeOOH granule carry out depth integration.
In the embodiment of any one of the present invention, step 1) in, the consumption of described oxygen-containing gas is 1-3m3/ (kg desulfurization Agent);It is preferably 1-2m3/ (kg desulfurizing agent), 1m3/ (kg desulfurizing agent), 1.5m3/ (kg desulfurizing agent), 2m3/ (kg desulfurizing agent) or 3m3/ (kg desulfurizing agent).
In the embodiment of any one of the present invention, step 1) oxygen-containing gas selected from nitrogen and the gaseous mixture of oxygen, oxygen With air;Preferably in gaseous mixture, the volume ratio of nitrogen and oxygen is (1-10): 1, more preferably 1:1,4:1,6:1,8:1 or 10: 1。
In the embodiment of any one of the present invention, step 2) in, described flue gas (in terms of sulfur dioxide in flue gas) is with described In mixture, the weight ratio of desulfurizing agent is 1:(1-20);Be preferably 1:(2-10), 1:(5-15), 1:1,1:8,1:10,1:15,1: 17 or 1:20.
In the embodiment of any one of the present invention, step 2) in, the water content of described flue gas is 5%-20% (w/w);Excellent Elect 8%-15% (w/w), 5% (w/w), 7% (w/w), 10% (w/w), 14% (w/w), 17% (w/w) or 20% (w/w) as.
In the embodiment of any one of the present invention, step 2) in, the time of contact is 20 minutes-1.5 hours;It is preferably 20-30 minute, 40 minutes, 60 minutes or 90 minutes.
In the embodiment of any one of the present invention, step 2) in, described flue gas and mixture in desulfurizing tower along phase negative side To flowing and contacting.
In the embodiment of any one of the present invention, also include step 2) process after flue gas carry out the step of dedusting;Excellent Selection of land, introduces flue gas cleaner unit and carries out dedusting.
In any embodiment of first aspect present invention, in step (4), the temperature of constant temperature dipping is poly-fourth in step (4) The temperature of succinate adipate.
In the embodiment of any one of the present invention, described soluble iron saline solution is soluble iron saline solution.
In the embodiment of any one of the present invention, the addition of described soluble iron saline solution is that 100-200 weight portion is (excellent Elect 100,140,160,200 weight portions as), described in step (1), the addition of poly butylene succinate is 7-15 weight portion (preferably 7,9,13,15 weight portions).
In the embodiment of any one of the present invention, the weight percentage of soluble ferric iron salt in described soluble iron saline solution For 40-60% (preferably 40%, 50% or 60%);Preferably, any in ferric nitrate and iron chloride of soluble ferric iron salt One or more.
In the embodiment of any one of the present invention, described in step (1), the particle diameter of poly butylene succinate is 200-800 μm, preferably 200-500 μm, 200 μm, 300 μm, 400 μm, 500 μm, 700 μm or 800 μm.The poly-succinic of this particle size range The FeOOH granule that butanediol ester is more easy to and generates merges.
In the embodiment of any one of the present invention, described urea liquid is aqueous solution of urea.
In the embodiment of any one of the present invention, the molar concentration of described urea liquid is 0.01-1mol/L, is preferably 0.01-0.2mol/L, 0.1mol/L, 0.2mol/L, 0.4mol/L, 0.7mol/L, 0.8mol/L or 1mol/L.
In the embodiment of any one of the present invention, described sodium bicarbonate solution is sodium bicarbonate aqueous solution.
In the embodiment of any one of the present invention, the molar concentration of described sodium bicarbonate solution is 0.1-0.5mol/L, excellent Elect 0.1-0.3mol/L, 0.1mol/L, 0.2mol/L, 0.3mol/L, 0.4mol/L or 0.5mol/L as.
In the embodiment of any one of the present invention, the addition of described urea liquid is 6-13 weight portion, preferably 6-10 Weight portion, 6-8 weight portion, 6 weight portions, 7 weight portions, 8 weight portions, 9 weight portions, 10 weight portions, 10.5 weight portions, 11 weight Part, 12 weight portions or 13 weight portions.
In the embodiment of any one of the present invention, the drying temperature in step (3) and/or step (4) is 130-160 DEG C, Preferably, the drying temperature in step (3) and/or step (4) is 130 DEG C, 140 DEG C, 150 DEG C or 160 DEG C.
The purpose dried in step (3) and/or step (4) is to reduce water content.
In the embodiment of any one of the present invention, the sintering temperature in step (3) is 200-250 DEG C;Preferably 200 DEG C, 210 DEG C, 220 DEG C, 225 DEG C, 230 DEG C, 240 DEG C or 250 DEG C.
In the embodiment of any one of the present invention, roasting time is 0.5-2 hour, preferably 0.5,1,1.5 or 2 hours.
In the embodiment of any one of the present invention, the addition of the described poly butylene succinate in step (4) is 20- 50 weight portions;It is preferably 30-45 weight portion, 20 weight portions, 30 weight portions, 40 weight portions, 45 weight portions or 50 weight portions.
In the embodiment of any one of the present invention, dip time is 8-12 hour;It is preferably 8 hours, 10 hours or 12 little Time.
In the embodiment of any one of the present invention, the addition of described binding agent is 5-10 weight portion, preferably 5-8 weight Part, 5 weight portions, 6 weight portions, 7 weight portions, 8 weight portions, 9 weight portions or 10 weight portions;The addition of described pore creating material is 1-3 Weight portion, preferably 1 weight portion, 2 weight portions or 3 weight portions.
In the embodiment of any one of the present invention, it is any that described binding agent is selected from bentonite, kieselguhr and Kaolin One or more.
In the embodiment of any one of the present invention, described pore creating material in wood dust and graphite powder any one or many Kind.
In the embodiment of any one of the present invention, oxygen-containing atmosphere is oxygen and the gaseous mixture of nitrogen or air;Preferably, mixed Closing in gas, oxygen is (1-9) with the volume ratio of nitrogen: (9-1), more preferably (2-8): (8-2), 2:8,3:7,4:6 or 5:5.
In the embodiment of any one of the present invention, poly butylene succinate described in step (1) and/or step (4) Number-average molecular weight Mn is 1 × 105~2 × 105;Preferably, poly butylene succinate described in step (1) and/or step (4) Number-average molecular weight Mn be 1 × 105、1.5×105Or 2 × 105
The beneficial effect that the present invention obtains:
1, the method that the present invention removes sulfide in flue gas, uses the Sulfur capacity height of desulfurizing agent, desulfurization precision height, resistant to breakage strong Degree is high, specific surface area is big, thus improves efficiency and the economy of flue gas desulfurization.
2, the mixture of the method that the present invention removes sulfide in flue gas, oxygen-containing gas and desulfurizing agent is at high temperature to flue gas The desulfuration efficiency carrying out desulfurization is higher.
3, the method that the present invention removes sulfide in flue gas, the desulfurizing agent of use is using poly butylene succinate as preparation One of raw material, improves the performance of desulfurizing agent.
Detailed description of the invention
In order to make present disclosure be more likely to be clearly understood, below in conjunction with the specific embodiment of the present invention to this Bright it is described in further detail, but specific embodiment itself does not cause limiting the scope of the invention.
Embodiment 1 prepares desulfurizing agent 1
1000g, the ferric chloride solution of 60% (w/w) and 70g poly butylene succinate are mixed, poly-succinic acid-butanediol The particle diameter of ester is 200-400 μm, and number-average molecular weight Mn is 1 × 105~1.2 × 105.60g, 0.8mol/L is added in mixture Urea liquid, more slowly the most dropwise instill 0.1mol/L sodium bicarbonate solution and stir, until solution ph reaches 6.8.Will To material put in reactor, 120-140 DEG C, react 3 hours under the conditions of 0.10-0.12MPa, standing sedimentation is precipitated Granule.Isolated precipitation granule is mixed homogeneously with 50g bentonite, 10g wood dust, dries at 130-140 DEG C, then at sky In 200-210 DEG C of roasting 2 hours in gas atmosphere, obtain calcining matter.The calcining matter obtained is put into the poly-fourth of liquid of 120-130 DEG C In succinate adipate, constant temperature impregnates 8 hours, then dries at 130-140 DEG C, and cooling obtains desulfurizing agent 1.
Embodiment 2 prepares desulfurizing agent 2
1600g, the iron nitrate solution of 50% (w/w) and 130g poly butylene succinate are mixed, poly-succinic fourth two The particle diameter of alcohol ester is 500-700 μm, and number-average molecular weight Mn is 1.5 × 105~2 × 105.In mixture add 100g, The urea liquid of 0.2mol/L, more dropwise instill 0.4mol/L sodium bicarbonate solution and stir, until solution ph reaches 7.The material obtained is put in reactor, 140-160 DEG C, react 3 hours under the conditions of 0.10-0.12MPa, standing sedimentation obtains To precipitation granule.Isolated precipitation granule is mixed homogeneously with 70g kieselguhr, 20g wood dust, dries at 150-160 DEG C, Again in 230-240 DEG C of roasting 2 hours in air atmosphere, obtain calcining matter.The calcining matter obtained is put into the liquid of 140-150 DEG C In state poly butylene succinate, constant temperature impregnates 12 hours, then dries at 150-160 DEG C, and cooling obtains desulfurizing agent 2.
Embodiment 3 prepares desulfurizing agent 3
2000g, the ferric chloride solution of 40% (w/w) and 150g poly butylene succinate are mixed, poly-succinic fourth two The particle diameter of alcohol ester is 700-800 μm, and number-average molecular weight Mn is 1.5 × 105~2 × 105.In mixture add 130g, The urea liquid of 0.05mol/L, more dropwise instill 0.5mol/L sodium bicarbonate solution and stir, until solution ph reaches 7.5.The material obtained is put in reactor, 120-140 DEG C, react 3 hours under 0.10-0.12MPa, standing sedimentation obtains Precipitation granule.Isolated precipitation granule is mixed homogeneously with 100g kieselguhr, 30g wood dust, dries at 150-160 DEG C, Again in 240-250 DEG C of roasting 2 hours in air atmosphere, obtain calcining matter.The calcining matter obtained is put into the liquid of 140-150 DEG C In state poly butylene succinate, constant temperature impregnates 8 hours, then dries at 150-160 DEG C, and cooling obtains desulfurizing agent 3.
Embodiment 4 fume desulphurization method of the present invention I
200g desulfurizing agent 1 is mixed mutually with 600L air, forms mixing logistics.By mixing logistics entering by desulfurizing tower top Material mouth sprays in desulfurizing tower, by content of sulfur dioxide be 2000mg/L, water content be the flue gas in thermal power plant of 5% (w/w) 10L is passed through in the air inlet bottom desulfurizing tower.Temperature in desulfurizing tower is maintained at 100-130 DEG C, and flue gas is taking off with mixing logistics Flow in opposite direction in sulfur tower and keep contacting 30 minutes, after being drawn flue gas by tower top gas outlet and sent into cleaner unit dedusting, Collect to obtain gas 1.
Embodiment 5 fume desulphurization method of the present invention II
200g desulfurizing agent 2 is mixed, shape mutually with the gaseous mixture (nitrogen, volume ratio 4:1 of oxygen) of 400L nitrogen and oxygen Resulting mixture stream.Mixing logistics is sprayed in desulfurizing tower by the feeding mouth on desulfurizing tower top, is 2500mg/ by content of sulfur dioxide L, water content are that the flue gas 10L in the thermal power plant of 6% (w/w) is passed through in the air inlet bottom desulfurizing tower.Temperature in desulfurizing tower Degree is maintained at 150-170 DEG C, and flue gas flows in opposite direction in desulfurizing tower with mixing logistics and keeps contacting 40 minutes, by tower Eject QI KOU draw flue gas and send in cleaner unit after dedusting, collect to obtain gas 2.
Embodiment 6 fume desulphurization method of the present invention III
400g desulfurizing agent 3 is mixed mutually with 400L air, forms mixing logistics.By mixing logistics entering by desulfurizing tower top Material mouth sprays in desulfurizing tower, by content of sulfur dioxide be 2000mg/L, water content be the flue gas in thermal power plant of 8% (w/w) 10L is passed through in the air inlet bottom desulfurizing tower.Temperature in desulfurizing tower is maintained at 190-220 DEG C, and flue gas is taking off with mixing logistics Flow in opposite direction in sulfur tower and keep contacting 60 minutes, tower top gas outlet drawing flue gas and send in cleaner unit after dedusting, Collect to obtain gas 3.
Comparative example 1 prepares desulfurizing agent A
To 1000g, 60% (w/w) ferric chloride solution in add the urea liquid of 60g, 0.8mol/L and mix mutually, then delay Slow dropwise instillation 0.1mol/L sodium bicarbonate solution also stirs, until solution ph reaches 6.8.The material obtained is put into reaction In still, 120-140 DEG C, react 3 hours under the conditions of 0.10-0.12MPa, standing sedimentation is precipitated granule.By isolated Precipitation granule is mixed homogeneously with 50g bentonite, 10g wood dust, dries at 130-140 DEG C, then in 200-in air atmosphere 210 DEG C of roastings 2 hours, cooling obtains desulfurizing agent A.
Comparative example 2
200g desulfurizing agent A and 600L air is mixed mutually, forms mixing logistics.By mixing logistics entering by desulfurizing tower top Material mouth sprays in desulfurizing tower, by content of sulfur dioxide be 2000mg/L, water content be the flue gas in thermal power plant of 5% (w/w) 10L is passed through in the air inlet bottom desulfurizing tower.Temperature in desulfurizing tower is maintained at 100-130 DEG C, and flue gas is taking off with mixing logistics Flow in opposite direction in sulfur tower and keep contacting 30 minutes, after being drawn flue gas by tower top gas outlet and sent into cleaner unit dedusting, Collect to obtain gas A.
Comparative example 3
By content of sulfur dioxide be 2000mg/L, water content be that the flue gas 10L in thermal power plant of 5% (w/w) is passed through de- In the air inlet of sulfur tower bottom, the desulfurizing agent 1 of embodiment 1 is sent in the desulfurizing agent entrance on desulfurizing tower top, desulfurizing tower simultaneously Interior temperature is maintained at 25-28 DEG C, and flue gas carries out mixing and keep to contact 30 minutes with desulfurizing agent reverse flow in desulfurizing tower, After being drawn dedusting by tower top gas outlet, collect to obtain gas B.
Experimental example 1 desulfurization precision
Unstripped gas is set for containing 5000ppmH2The nitrogen of S, each 3g of desulfurizing agent 1-3, A of Example 1-3 and comparative example, At normal pressure (usually 1 atmospheric pressure), carrying out repeatedly desulfurization test between 10-45 DEG C respectively, gas air speed is 2000h-1
Finally recording: under each temperature conditions, unstripped gas is after desulfurizing agent 1-3 processes, and outlet total sulfur is below 0.01ppm;Unstripped gas is after desulfurizing agent A processes, and outlet total sulfur is about 0.08ppm.Therefore, the desulfurizing agent 1-3's of the present invention is de- Sulfur precision is higher than desulfurizing agent A.
Experimental example 2 Sulfur capacity
Desulfurizing agent 1-3, A of Example 1-3 and comparative example make sample, measure Sulfur capacity respectively.Take sample 100g, 10 DEG C-45 DEG C, under normal pressure (usually 1 atmospheric pressure), with containing H2S is that the Standard Gases of 40000ppm is evaluated and tested.Qualitative detection, can be certainly Join silver nitrate solution outlet sulfur is detected;Detection by quantitative, can use domestic WK-2C comprehensive Microcoulomb instrument (Jiangsu electroanalysis Instrument plant) detect, the detection limit of this instrument is 0.2ppm, and result is as shown in table 1.
Table 1
Test event Desulfurizing agent 1 Desulfurizing agent 2 Desulfurizing agent 3 Desulfurizing agent A
Sulfur capacity 80.1% 79.3% 81.7% 49.8%
Visible, the Sulfur capacity of inventive desulfurization agent 1-3 is far longer than desulfurizing agent A.
Experimental example 3 physical property
After measured, the crushing strength of inventive desulfurization agent 1-3 is more than 110N/cm, and specific surface area is 90-140m2/g;De- The crushing strength of sulfur agent A is 50N/cm, and specific surface area is 50-70m2/g.The resistant to breakage that the inventive method obtains desulfurizing agent is strong Degree and specific surface area are all higher than desulfurizing agent A.
Experimental example 4 desulfuration efficiency
Dioxy in gas 1-3, the cumulative volume of gas A-B and each gas that mensuration embodiment 4-6 and comparative example 2-3 are collected Change the content of sulfur, and calculate desulfuration efficiency according to the following formula, the results are shown in Table 2.
Desulfuration efficiency=100% × (V0×C0-V×C)/(V0×C0×t)
Wherein:
V is the cumulative volume (L) collecting the gas obtained;
C is to collect content of sulfur dioxide (mg/L) in the gas obtained;
V0Cumulative volume (L) for flue gas;
C0For sulfur dioxide in flue gas content (mg/L);
T is desulfurization time (h).
Table 2
As shown in Table 2, compared with the method that comparative example 2 uses desulfurizing agent A, the present invention uses the method for desulfurizing agent 1-3 to take off Sulphur efficiency is higher.Further, compared with comparative example 3, at high temperature flue gas is taken off with the mixture of oxygen-containing gas and desulfurizing agent During sulfur, desulfuration efficiency is higher.
Inventor's test records, and compared with other Contact Temperature, flue gas connects at 100-220 DEG C with spraying into mixture Touching, the desulfuration efficiency of flue gas is higher.
Obviously, above-described embodiment is only for clearly demonstrating example, and not restriction to embodiment.Right For those of ordinary skill in the field, can also make on the basis of the above description other multi-form change or Variation.Here without also cannot all of embodiment be given exhaustive.And the obvious change thus extended out or Change among still in the protection domain of the invention.

Claims (10)

1. the method removing sulfide in flue gas, comprises the steps,
1) by oxygen-containing gas and desulphurizer mixing, and spray in desulfurizing tower;
2) in desulfurizing tower, flue gas contacts at 100-220 DEG C with the mixture sprayed into;
Wherein, the preparation method of described desulfurizing agent comprises the steps:
(1) soluble iron saline solution and poly butylene succinate are mixed;In mixture, add urea liquid, more slowly add Enter sodium bicarbonate solution and mix, until pH value reaches 6.8-7.5;
(2) material that step (1) is obtained 120-160 DEG C, react 1-3 hour under the conditions of 0.10-0.20MPa, sedimentation obtains Precipitation granule;
(3) described precipitation granule is mixed with binding agent, pore creating material, dries, then roasting in oxygen-containing atmosphere;
(4) calcining matter that step (3) obtains is put into constant temperature in the poly butylene succinate of 120-200 DEG C impregnate, then dry, Cool down.
Method the most according to claim 1, wherein, step 1) in, the consumption of described oxygen-containing gas is 1-3m3/ (kg desulfurization Agent).
Method the most according to claim 1, wherein, step 2) in, flue gas (in terms of sulfur dioxide in flue gas) is mixed with described The weight ratio of the desulfurizing agent in compound is 1:(1-20).
Method the most according to claim 1, wherein, step 2) in, the water content of described flue gas is 5%-20% (w/w).
Method the most according to claim 1, wherein, step 2) in, described flue gas is contrary with mixture edge in desulfurizing tower Flow and contact in direction.
Method the most according to claim 1, wherein, the addition of described soluble iron saline solution is 100-200 weight portion, The addition of the described poly butylene succinate in step (1) is 7-15 weight portion.
Method the most according to claim 1, wherein, the addition of described urea liquid is 6-13 weight portion.
Method the most according to claim 1, wherein, the drying temperature in step (3) and/or step (4) is 130-160 ℃。
Method the most according to claim 1, wherein, the sintering temperature in step (3) is 200-250 DEG C.
10. according to the method according to any one of claim 1-9, wherein, the described poly butylene succinate in step (4) Addition be 20-50 weight portion.
CN201610778002.2A 2016-08-30 2016-08-30 A kind of method removing sulfide in flue gas CN106110869A (en)

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