CN105457471A - Double-layer composite deep desulfurization method - Google Patents
Double-layer composite deep desulfurization method Download PDFInfo
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- CN105457471A CN105457471A CN201410425048.7A CN201410425048A CN105457471A CN 105457471 A CN105457471 A CN 105457471A CN 201410425048 A CN201410425048 A CN 201410425048A CN 105457471 A CN105457471 A CN 105457471A
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Abstract
The invention discloses a double-layer composite deep desulfurization method, which is characterized by including the steps of: (1) preparation of a desulfurizer; (2) preparation of an activated carbon carrier; (3) preparation of filler; and (4) flue gas treatment. By spraying, alkali lignin and lignin sulfonate contained in waste liquid react with sulfur ions to generate a stable structure, sulfur generated in smoke buring is removed, the filler preliminarily adsorpts adsorption powder and other ingredients as the raw materials, the coal gas desulphurization effect is greatly improved, surface acid oxidation is carried out on the activated carbon carrier, holes are arranged orderly and intercommunicated, gas can diffuse very easily therein, the desulfurization precision is improved and the utilization rate is high.
Description
Technical field
The invention belongs to flue dust technical field of desulfurization, be specifically related to a kind of two-layer compound process for deep desulphurization.
Background technology
In most cases can containing a large amount of sulfur dioxide gas in flue gas, the discharge of sulfur dioxide gas can affect air quality, the health of harmful to human.In addition, the sulfur dioxide be discharged in air can form acid rain, destroys the ecosystem.Therefore, if the flue gas containing ammonia is entered air, then not only can affect environment, but also the waste of resource can be caused.
Existing sulfur method has the desulfurization of calcium method usually, magnesium processes desulfurization, the ammonia process of desulfurization, the desulfurization of sodium method and the desulfurization of charcoal method several, different desulfurizing agent formulas is selected according to different sulfur methods, but the defect that single sulfur method exists, better desulfurized effect cannot be reached, in addition, in prior art, in sweetening process, the method of simple spray vulcanizing agent is often only adopted to deviate from, due to specific environment difference, chemical composition and the physical property difference of lime composite desulfurizing agent are larger, and desulfurizing agent composition is the key factor affecting desulfuration efficiency, fail to realize the effect of deep desulfuration.
Summary of the invention
For problems of the prior art, the object of the present invention is to provide a kind of two-layer compound process for deep desulphurization, by spray, react containing alkali lignin and lignosulphonates and sulphion in waste liquid and generate rock-steady structure, remove the sulphur produced in combustion fumes, inserts tentatively with compositions such as absorption powder for raw material, increase substantially the desulfurized effect of coal gas, absorbent charcoal carrier is by being oxidized its surface acid, pass arrangement in order, mutually through between hole, gas very easily spreads wherein, improves desulfurization precision and utilization rate is high.
The technical scheme that the present invention takes is:
A kind of two-layer compound process for deep desulphurization, it is characterized in that, it comprises the following steps:
(1) desulfurizing agent processed: the CaO black liquor that stalk slurrying obtains being added 5-7%, adds the mixed solution that sodium carbonate and basic aluminum sulfate form according to 2:3, and controlling matter liquor ratio is 3:10, stirs;
(2) preparing active carbon carrier: be that in the salpeter solution of 60%, control temperature is 105-110 DEG C, adds hot reflux 1.8-2h, carries out surface acid oxidation in concentration by selected active carbon, roasting under argon atmosphere after drying;
(3) inserts processed: get aluminium powder, alumina and pitch coke powder according to weight ratio 2:2:3 and mix, spray with the mixed liquor that ammonium sulfite and ammoniacal liquor form according to 2:3;
(4) fume treatment: install activity carbon carrier, desulfurizing agent spray equipment and inserts filter from top to bottom successively in inside, absorption tower, remain in the temperature range of 260-280 DEG C, flue gas is first adsorbed by inserts from top to bottom in advance, sprayed by desulfurizing agent again, eventually pass the suction-operated of absorbent charcoal carrier, carry out deep desulfuration.
Further, in described step (1), stalk slurrying adopts matter liquor ratio to be obtaining for aqueous solution soaking 4-5 days of 3:4.
Further, in described step (2), sintering temperature is 380 DEG C-420 DEG C, roasting time 3-4h.
Further, temperature when desulfurizing agent sprays in described step (4) controls in the scope of 80 DEG C-85 DEG C.
Beneficial effect of the present invention is:
The desulfurizing agent that the present invention obtains, takes full advantage of stalk resource, by spray, reacts and generates rock-steady structure, remove the sulphur produced in combustion fumes, improve flue gas desulphuization rate in waste liquid containing alkali lignin and lignosulphonates and sulphion.
Inserts to the absorption process that take part in SO2, tentatively with compositions such as absorption powder for raw material, increase substantially the desulfurized effect of coal gas.
Absorbent charcoal carrier in the present invention is by being oxidized its surface acid, and in order, mutually through between hole, gas very easily spreads wherein in pass arrangement, improves desulfurization precision and utilization rate is high, can be used for the desulfurization of high added value product.
Detailed description of the invention
Embodiment 1
A kind of two-layer compound process for deep desulphurization, it is characterized in that, it comprises the following steps:
(1) desulfurizing agent processed: adopted by stalk matter liquor ratio to be the aqueous solution soaking 4 days of 3:4, the black liquor that slurrying obtains adds the CaO of 5%, add the mixed solution that sodium carbonate and basic aluminum sulfate form according to 2:3, controlling matter liquor ratio is 3:10, stirs;
(2) preparing active carbon carrier: be that in the salpeter solution of 60%, control temperature is 105 DEG C, adds hot reflux 2h, carries out surface acid oxidation in concentration by selected active carbon, after drying, sintering temperature is 380 DEG C under argon atmosphere, roasting time 4h;
(3) inserts processed: get aluminium powder, alumina and pitch coke powder according to weight ratio 2:2:3 and mix, spray with the mixed liquor that ammonium sulfite and ammoniacal liquor form according to 2:3;
(4) fume treatment: install activity carbon carrier, desulfurizing agent spray equipment and inserts filter from top to bottom successively in inside, absorption tower, remain in the temperature range of 260 DEG C, flue gas is first adsorbed by inserts from top to bottom in advance, sprayed by desulfurizing agent again, temperature controls in the scope of 80 DEG C, eventually pass the suction-operated of absorbent charcoal carrier, carry out deep desulfuration.
Embodiment 2
A kind of two-layer compound process for deep desulphurization, it is characterized in that, it comprises the following steps:
(1) desulfurizing agent processed: adopted by stalk matter liquor ratio to be the aqueous solution soaking 5 days of 3:4, the black liquor that slurrying obtains adds the CaO of 6%, add the mixed solution that sodium carbonate and basic aluminum sulfate form according to 2:3, controlling matter liquor ratio is 3:10, stirs;
(2) preparing active carbon carrier: be that in the salpeter solution of 60%, control temperature is 108 DEG C, adds hot reflux 1.9h, carries out surface acid oxidation in concentration by selected active carbon, after drying, sintering temperature is 400 DEG C under argon atmosphere, roasting time 3.5h;
(3) inserts processed: get aluminium powder, alumina and pitch coke powder according to weight ratio 2:2:3 and mix, spray with the mixed liquor that ammonium sulfite and ammoniacal liquor form according to 2:3;
(4) fume treatment: install activity carbon carrier, desulfurizing agent spray equipment and inserts filter from top to bottom successively in inside, absorption tower, remain in the temperature range of 270 DEG C, flue gas is first adsorbed by inserts from top to bottom in advance, sprayed by desulfurizing agent again, temperature controls in the scope of 83 DEG C, eventually pass the suction-operated of absorbent charcoal carrier, carry out deep desulfuration.
Embodiment 3
A kind of two-layer compound process for deep desulphurization, it is characterized in that, it comprises the following steps:
(1) desulfurizing agent processed: adopted by stalk matter liquor ratio to be the aqueous solution soaking 5 days of 3:4, the black liquor that slurrying obtains adds the CaO of 7%, add the mixed solution that sodium carbonate and basic aluminum sulfate form according to 2:3, controlling matter liquor ratio is 3:10, stirs;
(2) preparing active carbon carrier: be that in the salpeter solution of 60%, control temperature is 110 DEG C, adds hot reflux 1.8h, carries out surface acid oxidation in concentration by selected active carbon, after drying, sintering temperature is 420 DEG C under argon atmosphere, roasting time 3h;
(3) inserts processed: get aluminium powder, alumina and pitch coke powder according to weight ratio 2:2:3 and mix, spray with the mixed liquor that ammonium sulfite and ammoniacal liquor form according to 2:3;
(4) fume treatment: install activity carbon carrier, desulfurizing agent spray equipment and inserts filter from top to bottom successively in inside, absorption tower, remain in the temperature range of 280 DEG C, flue gas is first adsorbed by inserts from top to bottom in advance, sprayed by desulfurizing agent again, temperature controls in the scope of 85 DEG C, eventually pass the suction-operated of absorbent charcoal carrier, carry out deep desulfuration.
Claims (4)
1. a two-layer compound process for deep desulphurization, is characterized in that, it comprises the following steps:
(1) desulfurizing agent processed: the CaO black liquor that stalk slurrying obtains being added 5-7%, adds the mixed solution that sodium carbonate and basic aluminum sulfate form according to 2:3, and controlling matter liquor ratio is 3:10, stirs;
(2) preparing active carbon carrier: be that in the salpeter solution of 60%, control temperature is 105-110 DEG C, adds hot reflux 1.8-2h, carries out surface acid oxidation in concentration by selected active carbon, roasting under argon atmosphere after drying;
(3) inserts processed: get aluminium powder, alumina and pitch coke powder according to weight ratio 2:2:3 and mix, spray with the mixed liquor that ammonium sulfite and ammoniacal liquor form according to 2:3;
(4) fume treatment: install activity carbon carrier, desulfurizing agent spray equipment and inserts filter from top to bottom successively in inside, absorption tower, remain in the temperature range of 260-280 DEG C, flue gas is first adsorbed by inserts from top to bottom in advance, sprayed by desulfurizing agent again, eventually pass the suction-operated of absorbent charcoal carrier, carry out deep desulfuration.
2. a kind of composite depth sulfur method according to claim 1, is characterized in that, in described step (1), stalk slurrying adopts matter liquor ratio to be obtaining for aqueous solution soaking 4-5 days of 3:4.
3. a kind of composite depth sulfur method according to claim 1, is characterized in that, in described step (2), sintering temperature is 380 DEG C-420 DEG C, roasting time 3-4h.
4. a kind of composite depth sulfur method according to claim 1, is characterized in that, temperature when desulfurizing agent sprays in described step (4) controls in the scope of 80 DEG C-85 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410425048.7A CN105457471A (en) | 2014-08-27 | 2014-08-27 | Double-layer composite deep desulfurization method |
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| CN201410425048.7A CN105457471A (en) | 2014-08-27 | 2014-08-27 | Double-layer composite deep desulfurization method |
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| CN105457471A true CN105457471A (en) | 2016-04-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106215680A (en) * | 2016-07-22 | 2016-12-14 | 太原理工大学 | A kind of preparation method of ordered porous zinc-aluminium composite desulfurizing agent |
| CN106310912A (en) * | 2016-08-29 | 2017-01-11 | 郭嘉威 | Wet desulfurization tower and desulfurization technology thereof |
-
2014
- 2014-08-27 CN CN201410425048.7A patent/CN105457471A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106215680A (en) * | 2016-07-22 | 2016-12-14 | 太原理工大学 | A kind of preparation method of ordered porous zinc-aluminium composite desulfurizing agent |
| CN106215680B (en) * | 2016-07-22 | 2018-12-28 | 太原理工大学 | A kind of preparation method of ordered porous zinc-aluminium composite desulfurizing agent |
| CN106310912A (en) * | 2016-08-29 | 2017-01-11 | 郭嘉威 | Wet desulfurization tower and desulfurization technology thereof |
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Application publication date: 20160406 |
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