CN106377996A - Flue gas desulphurization method - Google Patents
Flue gas desulphurization method Download PDFInfo
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- CN106377996A CN106377996A CN201610767965.2A CN201610767965A CN106377996A CN 106377996 A CN106377996 A CN 106377996A CN 201610767965 A CN201610767965 A CN 201610767965A CN 106377996 A CN106377996 A CN 106377996A
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- flue gas
- butylene succinate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention belongs to the field of environmental protection and relates to a flue gas desulphurization method. The flue gas desulphurization method comprises 1, mixing oxygen-containing gas and a desulfurizer and injecting the mixture into a desulfurization tower, and 2, making flue gas and the injected mixture contact at a temperature of 100-220 DEG C in the desulfurization tower. A preparation method of the desulfurizer comprises 1, mixing iron oxide, ferrous sulphate, fluorite and magnesium chloride, 2, adding sodium borate and poly(butylene succinate) into the mixture obtained by the step 1, mixing the mixture at a temperature of 90-120 DEG C, carrying out maintenance for 20-25h and carrying out drying and roasting and 3, dipping the roasting product obtained by the step 2 into poly(butylene succinate) at the constant temperature of 120-200 DEG C and carrying out drying and cooling. The flue gas desulphurization method has high desulphurization efficiency and economical efficiency.
Description
Technical field
The invention belongs to field of Environment Protection is and in particular to a kind of method for flue gas desulfurization.
Background technology
Coal combustion or industry manufacture in the flue gas producing and often contain sulfide.Sulfide is mainly derived from coal or industry is former
Expect the sulfur material containing, sulfur material reacts in combustion process or industrial manufacturing process, conversion sulphidisation discharges.
Sulfide particularly hydrogen sulfide, sulfur dioxide etc. can frequently result in the catalyst poisoning inactivation producing in workshop section, 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 industrial life due to reducing sulfide content
Produce and environmental protection, therefore researcher gives more concerns 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..Through research for many years, although desulfurizing agent species 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 still relatively low it is difficult to meet flue gas desulfurization to efficiency and
The requirement of economy.
Still need at present a kind of economic, method of being efficiently used for flue gas desulfurization, to meet industry, civil area takes off to flue gas
The active demand of sulphur.
Content of the invention
The inventors found that a kind of method for flue gas desulfurization, using prepared high sulfur capacity, high desulfurization essence
The desulfurizing agent of degree, high transverse rupture strength and bigger serface, carries out desulfurization to flue gas, substantially increases desulfuration efficiency, and more
For economical and practical.And, the desulfuration efficiency that the mixture of oxygen-containing gas and desulfurizing agent carries out desulfurization to flue gas at high temperature is higher.
The present invention relates to a kind of method for flue gas desulfurization, comprise the steps,
1) by oxygen-containing gas and desulphurizer mixing, and spray in desulfurizing tower；
2) in desulfurizing tower, flue gas is contacted at 100-220 DEG C with the mixture spraying 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) iron oxide, ferrous sulfate, fluorite and magnesium chloride are mixed；
(2) Boratex and poly butylene succinate are added in the mixture obtaining to step (1), at 90 DEG C -120 DEG C
Mixing, then maintenance 20-25 hour, drying, roasting；Preferably, 90-110 DEG C, 90 DEG C, 95 DEG C, 100 DEG C, 105 DEG C, 110 DEG C,
Mix at 115 DEG C or 120 DEG C；Preferably, curing time is 20 hours, 22 hours, 23 hours or 25 hours；
(3) calcining matter obtaining step (2) puts into constant temperature dipping in 120-200 DEG C of poly butylene succinate, then
Dry, cool down；Preferably by calcining matter 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 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 be selected from the gaseous mixture of nitrogen and oxygen, oxygen,
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) with described
In mixture, the weight of desulfurizing agent is than for 1:(1-20)；It is 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 moisture 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 are in desulfurizing tower along phase negative side
To flowing and contact.
In the embodiment of any one of the present invention, also include to step 2) process after the flue gas step that carries out dedusting；Excellent
Selection of land, flue gas introducing deduster is carried out dedusting.
In any embodiment of first aspect present invention, in step (3), the temperature of constant temperature dipping is poly- fourth in step (3)
The temperature of succinate adipate.
In the embodiment of any one of the present invention, the addition of described iron oxide is 40-53 weight portion (preferably 40,50
Or 53 weight portions), the addition of described ferrous sulfate is 20-35 weight portion (preferably 20,28 or 35 weight portion), described fluorite
Addition be 15-20 weight portion (preferably 15,18 or 20 weight portion), the addition of described magnesium chloride is 8-14 weight portion
(preferably 8,12 or 14 weight portion).
In the embodiment of any one of the present invention, described iron oxide, fluorite particle diameter be 600-1000 μm (preferably 600,
700th, 800,850,900 or 1000 μm).
In the embodiment of any one of the present invention, described ferrous sulfate, magnesium chloride particle diameter be 200-500 μm (preferably
200th, 300,350,400 or 500 μm).
The iron oxide of above-mentioned particle diameter, ferrous sulfate, fluorite and magnesium chloride mixing are more uniform.
In the embodiment of any one of the present invention, the addition of described Boratex is 5-13 weight portion (preferably 5,9 or 13
Weight portion), the addition of the described poly butylene succinate in step (2) is 7-15 weight portion (preferably 7,8,10 or 15
Weight portion).
Boratex contributes to making poly butylene succinate and iron oxide, the mixture of ferrous sulfate, fluorite and magnesium chloride
Uniformly merge.
In the embodiment of any one of the present invention, the particle diameter of poly butylene succinate described in step (2) is 300-800
μm, preferably 300 μm, 400 μm, 500 μm, 700 μm or 800 μm.The poly butylene succinate of this particle size range is more easy to and oxygen
Change iron, the mixture of ferrous sulfate, fluorite and magnesium chloride merges uniformly.
In the embodiment of any one of the present invention, the temperature of maintenance is 80-100 DEG C；Be preferably 80 DEG C, 90 DEG C, 95 DEG C or
100℃.
In the embodiment of any one of the present invention, the drying temperature in step (2) and/or step (3) is 120-150 DEG C；
Preferably, the drying temperature in step (2) and/or step (3) is 120 DEG C, 130 DEG C, 140 DEG C or 150 DEG C.
The purpose dried in step (2) and/or step (3) is to reduce water content, and moisture mostlys come from raw material.
In the embodiment of any one of the present invention, sintering temperature is 200-250 DEG C；Be 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 roasting process, under Boratex participates in (may be catalytic action), poly butylene succinate occurs chemistry to become
Change.
In the embodiment of any one of the present invention, the addition of poly butylene succinate described in step (3) is 20-45
Weight portion；It is preferably 30-45 weight portion, 20 weight portions, 30 weight portions, 40 weight portions or 45 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
When.Dipping makes poly butylene succinate carry out depth integration with iron oxide, ferrous sulfate, fluorite and magnesium chloride granules.
In the embodiment of any one of the present invention, the number of the poly butylene succinate in step (2) and/or step (3)
Average molecular weight Mn is 1 × 105～2 × 105；Preferably, the number of the poly butylene succinate in step (2) and/or step (3)
Average molecular weight Mn is 1 × 105、1.5×105Or 2 × 105.
The beneficial effect that the present invention obtains：
1st, the method that the present invention is used for flue gas desulfurization, the desulfurizing agent Sulfur capacity of use is high, desulfurization precision is high, crushing strength
High, specific surface area is big, thus improve efficiency and the economy of flue gas desulfurization.
2nd, the method that the present invention is used for flue gas desulfurization, the mixture of oxygen-containing gas and desulfurizing agent is carried out to flue gas at high temperature
The desulfuration efficiency of desulfurization is higher.
3rd, the method that the present invention is used for flue gas desulfurization, the desulfurizing agent being used is using poly butylene succinate as preparing raw material
One of, improve the performance of desulfurizing agent.
4th, the present invention is used for the desulfurizing agent that the method for flue gas desulfurization uses, and adds Boratex in the preparation, it is possible to increase poly-
The uniformity that succinic acid-butanediol ester is merged with other raw materials, and Boratex can promote poly butylene succinate in roasting
During occur chemical change.
Specific embodiment
In order that present disclosure is more likely to be clearly understood, with reference to the present invention specific embodiment to this
Bright be described in further detail, but specific embodiment itself does not cause limiting the scope of the invention.
Embodiment 1 prepares desulfurizing agent 1
400g iron oxide, 200g ferrous sulfate, 150g fluorite and 80g magnesium chloride are mixed, magnesium chloride and sulfuric acid are sub-
The particle diameter of iron is 200-400 μm, and the particle diameter of fluorite and iron oxide is 600-800 μm.50g boric acid is added in the mixture obtaining
Sodium and 70g poly butylene succinate, mix at 90 DEG C -100 DEG C, and the particle diameter of poly butylene succinate is 300-
500 μm, then maintenance 20 hours at 80-90 DEG C, dried with 120 DEG C, obtain compound A, then compound A roasts at 200 DEG C
Burn 2 hours, obtain calcining matter A.The calcining matter obtaining is put into constant temperature dipping 8 in 120 DEG C of 200g poly butylene succinate
Hour, then dry, cool down at 140 DEG C, obtain desulfurizing agent 1.Number-average molecular weight Mn of the poly butylene succinate using is 1.5
×105-2×105.
Embodiment 2 prepares desulfurizing agent 2
500g iron oxide, 280g ferrous sulfate, 180g fluorite and 120g magnesium chloride are mixed, magnesium chloride and sulfuric acid are sub-
The particle diameter of iron is 300-400 μm, and the particle diameter of fluorite and iron oxide is 700-900 μm.90g boric acid is added in the mixture obtaining
Sodium and 100g poly butylene succinate, mix at 110 DEG C -120 DEG C, the particle diameter 400- of poly butylene succinate
600 μm, then maintenance 23 hours at 90-95 DEG C, dried with 140 DEG C, then roasting 1 hour at 230 DEG C.By the roasting obtaining
Thing is put into constant temperature in 130 DEG C of 300g poly butylene succinate and is impregnated 12 hours, then dry at 150 DEG C, cooling, obtain desulfurization
Agent 2.Number-average molecular weight Mn of the poly butylene succinate using is 1 × 105-1.5×105.
Embodiment 3 prepares desulfurizing agent 3
530g iron oxide, 350g ferrous sulfate, 200g fluorite and 140g magnesium chloride are mixed, magnesium chloride and sulfuric acid are sub-
The particle diameter of iron is 400-500 μm, and the particle diameter of fluorite and iron oxide is 900-1000 μm.130g boron is added in the mixture obtaining
Sour sodium and 150g poly butylene succinate, mix at 110 DEG C -120 DEG C, the particle diameter 700- of poly butylene succinate
800 μm, then maintenance 25 hours at 95-100 DEG C, dried with 150 DEG C, then roasting 0.5 hour at 250 DEG C.By obtain
Calcining matter is put into constant temperature in 140 DEG C of 450g poly butylene succinate and is impregnated 10 hours, then dry at 150 DEG C, cooling, obtain
Desulfurizing agent 3.Number-average molecular weight Mn of the poly butylene succinate using is 1 × 105-1.5×105.
Method I that embodiment 4 present invention is used for flue gas desulfurization
200g desulfurizing agent 1 is mixed with 600L air phase, 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 5% (w/w) thermal power plant flue gas
10L is passed through in the air inlet of desulfurization tower bottom.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 sulphur tower and keep to contact 30 minutes, flue gas is drawn by tower top gas outlet and sends into after deduster dedusting,
Collect to obtain gas 1.
Embodiment 5 present invention is used for the method II of flue gas desulfurization
By the gaseous mixture of 200g desulfurizing agent 2 and 400L nitrogen and oxygen (nitrogen, oxygen volume ratio 4:1) mutually mix, shape
Resulting mixture stream.Mixing logistics is sprayed in desulfurizing tower by the feeding mouth on desulfurizing tower top, content of sulfur dioxide is 2500mg/
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 of desulfurization tower bottom.Temperature in desulfurizing tower
Degree is maintained at 150-170 DEG C, and flue gas flows in opposite direction in desulfurizing tower and keeps contacting 40 minutes with mixing logistics, by tower
After ejection gas port is drawn flue gas and sent into dedusting in deduster, collect to obtain gas 2.
Embodiment 6 present invention is used for the method III of flue gas desulfurization
400g desulfurizing agent 3 is mixed with 400L air phase, 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 8% (w/w) thermal power plant flue gas
10L is passed through in the air inlet of desulfurization tower bottom.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 sulphur tower and keep to contact 60 minutes, flue gas is drawn by tower top gas outlet and sends into after dedusting in deduster,
Collect to obtain gas 3.
Comparative example 1 prepares desulfurizing agent A
400g iron oxide, 200g ferrous sulfate, 150g fluorite and 80g magnesium chloride are added 20g water mix, magnesium chloride and
The particle diameter of ferrous sulfate is 200-400 μm, and the particle diameter of fluorite and iron oxide is 600-800 μm, then maintenance 20 is little at 80-90 DEG C
When, dried with 120 DEG C, then roasting 2 hours at 200 DEG C, cool down calcining matter, obtain desulfurizing agent A.
Comparative example 2 prepares compound B and calcining matter B
400g iron oxide, 200g ferrous sulfate, 150g fluorite and 80g magnesium chloride are mixed, magnesium chloride and sulfuric acid are sub-
The particle diameter of iron is 200-400 μm, and the particle diameter of fluorite and iron oxide is 600-800 μm.The poly- fourth of 70g is added in the mixture obtaining
Succinate adipate, mixes at 90 DEG C -100 DEG C, and the particle diameter of poly butylene succinate is 300-500 μm, then in 80-
Maintenance 20 hours at 90 DEG C, are dried with 120 DEG C, obtain compound B.By compound B at 200 DEG C roasting 2 hours, obtain roasting
Thing B.Number-average molecular weight Mn of the poly butylene succinate using is 1.5 × 105-2×105.
Comparative example 3
200g desulfurizing agent A is mixed with 600L air phase, 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 5% (w/w) thermal power plant flue gas
10L is passed through in the air inlet of desulfurization tower bottom.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 sulphur tower and keep to contact 30 minutes, flue gas is drawn by tower top gas outlet and sends into after deduster dedusting,
Collect to obtain gas A.
Comparative example 4
By content of sulfur dioxide be 2000mg/L, water content be 5% (w/w) thermal power plant flue gas 10L be passed through de-
In the air inlet of sulphur 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 reverse flow in desulfurizing tower is mixed and kept contacting 30 minutes flue gas with desulfurizing agent,
Drawn after dedusting by tower top gas outlet, collect to obtain gas B.
The desulfurization precision of experimental example 1 desulfurizing agent, Sulfur capacity and physical property
1st, desulfurization precision
Setting unstripped gas is containing 5000ppmH2The nitrogen of S, each 3g of desulfurizing agent 1-3, A of Example 1-3 and comparative example 1,
Carry out multiple desulfurization test respectively between normal pressure (usually 1 atmospheric pressure), 10-45 DEG C, gas air speed is 2000h-1.
Finally record：Under each temperature conditionss, after desulfurizing agent 1-3 process, outlet total sulfur is below unstripped gas
0.01ppm；After desulfurizing agent A process, outlet total sulfur is about 0.08ppm to unstripped gas.Therefore, the desulfurizing agent 1-3's of the present invention is de-
Sulphur precision is higher than desulfurizing agent A.
2nd, Sulfur capacity and physical property
Desulfurizing agent 1-3, A of Example 1-3 and comparative example 1 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 are evaluated and tested.Qualitative detection, can be certainly
Join silver nitrate solution outlet sulphur is detected；Quantitative determination, can be using domestic WK-2C synthesis Microcoulomb instrument (Jiangsu electroanalysis
Instrument plant) detected, 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 | 79.6% | 80.5% | 81.0% | 44.3% |
It can be seen that, the Sulfur capacity of inventive desulfurization agent 1-3 is far longer than desulfurizing agent A.
After measured, the crushing strength of inventive desulfurization agent 1-3 is more than 110N/cm, and specific surface area is 80-120m2/g；De-
The crushing strength of sulphur agent A is 40N/cm, and specific surface area is 50-60m2/g.The crushing strength of inventive desulfurization agent 1-3 and ratio
Surface area is above desulfurizing agent A.
Experimental example 2：The uniformity of compound and the chemical change of calcining matter
1st, mixture uniformity
The compound A-B of embodiment 1, comparative example 2 is detected.
At random 10g is respectively taken as sample to compound A-B, with micro- sem observation it can be observed that：Larger in compound B
Particle (may be considered merge formed particle) substantially concentrate on central authorities, do not scatter；And it is larger in compound A sample
Particle (may be considered merge formed particle) be all distributed in everywhere, dispersion is more uniform.Therefore, adding Boratex has
Help make poly butylene succinate equably merge with other raw materials, then it is observed that the bulky grain being fused into throughout
It is uniformly distributed.
2nd, calcining matter chemical change
To embodiment 1, the compound A-B of comparative example 2 and calcining matter A-B adopt Nicolet company of the U.S. Nexus 670
Type Fourier transformation infrared spectrometer is detected under similarity condition.It is found that：Compound B and the infrared light of calcining matter B
Spectrum is extremely approximate；The infrared spectrum difference of calcining matter A and compound A is larger, except the ester group absworption peak in calcining matter A spectrogram subtracts
Weak outer, the infrared spectrum of calcining matter A 3 absworption peaks also more than the spectrogram of compound A.Add Boratex and contribute to poly-succinic
There is chemical change in butanediol ester in roasting process.
Experimental example 3：Desulfuration efficiency
Measure dioxy in gas 1-3, the cumulative volume of gas A-B and each gas that embodiment 4-6 and comparative example 3-4 are collected
Change the content of sulphur, 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 obtaining；
C is to collect content of sulfur dioxide (mg/L) in the gas obtaining；
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 using desulfurizing agent A for the comparative example 3, the present invention uses the method for desulfurizing agent 1-3 to take off
Sulphur efficiency is higher.And, compared with comparative example 4, at high temperature flue gas is taken off with the mixture of oxygen-containing gas and desulfurizing agent
During sulphur, desulfuration efficiency is higher.
Inventor's test records, and compared with other Contact Temperatures, flue gas connects at 100-220 DEG C with spraying into mixture
Touch, the desulfuration efficiency of flue gas is higher.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.Right
For those of ordinary skill in the art, can also make on the basis of the above description other multi-forms change or
Change.There is no need to be exhaustive to all of embodiment.And the obvious change thus extended out or
Change among still in the protection domain of the invention.
Claims (10)
1. a kind of method for flue gas desulfurization, comprises the steps,
1) by oxygen-containing gas and desulphurizer mixing, and spray in desulfurizing tower；
2) in desulfurizing tower, flue gas is contacted at 100-220 DEG C with the mixture spraying into；
Wherein, the preparation method of described desulfurizing agent comprises the steps：
(1) iron oxide, ferrous sulfate, fluorite and magnesium chloride are mixed；
(2) Boratex and poly butylene succinate are added in the mixture obtaining to step (1), mixed at 90 DEG C -120 DEG C
Close, then maintenance 20-25 hour, drying, roasting；
(3) calcining matter obtaining step (2) puts into constant temperature dipping in 120-200 DEG C of poly butylene succinate, then dry,
Cool down.
2. method according to claim 1, wherein, step 1) in, the consumption of described oxygen-containing gas is 1-3m3/ (kg desulfurization
Agent).
3. method according to claim 1, wherein, step 2) in, flue gas (in terms of sulfur dioxide in flue gas) is mixed with described
The weight of the desulfurizing agent in compound is than for 1:(1-20).
4. method according to claim 1, wherein, step 2) in, the moisture content of described flue gas is 5%-20% (w/w).
5. method according to claim 1, wherein, step 2) in, edge in desulfurizing tower is contrary with mixture for described flue gas
Flow and contact in direction.
6. method according to claim 1, wherein, the addition of described iron oxide is 40-53 weight portion, and described sulfuric acid is sub-
The addition of iron is 20-35 weight portion, and the addition of described fluorite is 15-20 weight portion, and the addition of described magnesium chloride is 8-
14 weight portions.
7. method according to claim 1, wherein, the addition of described Boratex is 5-13 weight portion, institute in step (2)
The addition stating poly butylene succinate is 7-15 weight portion.
8. method according to claim 1, wherein, the drying temperature in step (2) and/or step (3) is 120-150
℃.
9. method according to claim 1, wherein, sintering temperature is 200-250 DEG C.
10. the method according to any one of claim 1-9, wherein, poly butylene succinate described in step (3)
Addition is 20-45 weight portion.
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| CN204865475U (en) * | 2015-07-31 | 2015-12-16 | 辽宁中电投电站燃烧工程技术研究中心有限公司 | Coal -fired power plant boiler flue gas desulphurization device |
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| CN1193042A (en) * | 1997-03-10 | 1998-09-16 | 王保行 | High-energy sweetening coal-saving agent |
| CN102851090A (en) * | 2012-09-03 | 2013-01-02 | 杭州萧山管道燃气发展有限公司 | Biogas dry-type filtering desulphurization system and preparation method thereof |
| CN102876286A (en) * | 2012-09-25 | 2013-01-16 | 薛华 | Compound high-efficiency desulfurizer |
| CN204865475U (en) * | 2015-07-31 | 2015-12-16 | 辽宁中电投电站燃烧工程技术研究中心有限公司 | Coal -fired power plant boiler flue gas desulphurization device |
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Application publication date: 20170208 |