CN104001407A - Acidolysis waste gas recycling system - Google Patents
Acidolysis waste gas recycling system Download PDFInfo
- Publication number
- CN104001407A CN104001407A CN201410226401.9A CN201410226401A CN104001407A CN 104001407 A CN104001407 A CN 104001407A CN 201410226401 A CN201410226401 A CN 201410226401A CN 104001407 A CN104001407 A CN 104001407A
- Authority
- CN
- China
- Prior art keywords
- acid
- gas
- acidolysis
- silica gel
- waste gas
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002912 waste gas Substances 0.000 title claims abstract description 39
- 238000004064 recycling Methods 0.000 title abstract 5
- 239000002253 acid Substances 0.000 claims abstract description 97
- 239000007789 gas Substances 0.000 claims abstract description 92
- 239000000741 silica gel Substances 0.000 claims abstract description 46
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 46
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000003595 mist Substances 0.000 claims abstract description 32
- 238000010521 absorption reaction Methods 0.000 claims abstract description 22
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 9
- 238000005406 washing Methods 0.000 claims abstract description 8
- 239000002002 slurry Substances 0.000 claims abstract description 7
- 239000007921 spray Substances 0.000 claims description 34
- 238000005554 pickling Methods 0.000 claims description 32
- 238000011084 recovery Methods 0.000 claims description 27
- 239000006096 absorbing agent Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 150000002739 metals Chemical class 0.000 claims description 11
- 230000002745 absorbent Effects 0.000 claims description 9
- 239000002250 absorbent Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 239000011343 solid material Substances 0.000 claims description 8
- 238000010828 elution Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 6
- 230000007062 hydrolysis Effects 0.000 claims description 5
- 238000006460 hydrolysis reaction Methods 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 5
- 231100000331 toxic Toxicity 0.000 claims description 5
- 230000002588 toxic effect Effects 0.000 claims description 5
- 238000005213 imbibition Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 235000021110 pickles Nutrition 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The invention provides an acidolysis waste gas recycling system and belongs to the technical field of waste gas treatment and environmental equipment. Furthermore, the invention provides a system which utilizes the characteristic of waste gas of different acidolysis periods; during an acid mist outbreak period, silica gel is used for absorbing moisture in acid mist in a fluidized bed; acid is absorbed and recycled from acid mist by concentrated sulfuric acid; during a usual air agitating period, the silica gel is dried up by the waste gas and the waste gas is subjected to tail gas treatment; before the silica gel is used for absorbing the acid mist, the concentrated sulfuric acid is used for washing acidolysis waste gas; washing slurry is returned back to a titanium dioxide production procedure to recycle raw materials. The acidolysis waste gas recycling system has the beneficial effects that (1) the silica gel is used for absorbing moisture in the acid mist to reach the demisting effect and the concentrated sulfuric acid is used for absorbing and recycling the acid to recycle the acid; (2) the moisture absorption and the drying of the silica gel are respectively finished at different periods of acidolysis and materials and energy sources do no need to be consumed; (3) solid raw materials wrapped and mingled with the waste gas are recycled; (4) the implementation effect: the SO3 recycling rate is greater than or equal to 99.0%.
Description
The application belongs to exhaust-gas treatment and environmental unit technical field.The present invention relates to a kind of recovery system of acidolysis waste gas, more particularly, be one and utilize acidolysis different times waste gas feature, in the acid mist outbreak period, apply silica gel and absorb moisture in acid mist in fluid bed, acid gas absorbs recovered acid with the concentrated sulfuric acid; In air stirring phase at ordinary times, application waste gas dry silica gel, waste gas send the system of vent gas treatment again.
Background technology
Current sulfate process titanium dioxide is produced and is still accounted for very large proportion in China, sulfate process titanium dioxide is produced the serious three wastes problem that exists, wherein useless solid waste liquid has good solution, only has acidolysis waste gas problem, owing to producing a large amount of sulfuric acid mists in the short time,, still there is the problem of direct discharge in the solution not had so far.
Summary of the invention
In order to solve acidolysis waste gas problem in current sulfate process titanium dioxide production, the application proposes a kind of acidolysis gas recovery system, this system is reasonable, reaches raw materials recovery, eliminates the object of acid mist reclaim sulfuric acid, and system small investment, stable and reliable operation, energy resource consumption are few.
A kind of acidolysis gas recovery system, is one and utilizes acidolysis different times waste gas feature, in the acid mist outbreak period, applies silica gel and absorb moisture in acid mist in fluid bed, and acid gas absorbs recovered acid with the concentrated sulfuric acid; In air stirring phase at ordinary times, application waste gas dry silica gel, waste gas send vent gas treatment again; And before moisture, first washing acidolysis waste gas with the concentrated sulfuric acid in application silica gel absorbs acid mist, washing slurries return the system of Producing Titanium Dioxide hydrolysis procedure recovery raw material.
Described acidolysis gas recovery system absorbs rear pump by deentrainment tower, reversal valve, acid absorption column, tail gas absorber, sour absorbent recirculation pump, tail gas absorbent recirculation pump, tail gas and pickling circulating pump forms;
Described deentrainment tower acidolysis exhaust gas inlet is up provided with successively the rapid ball layer of pickling, pickling spray acid layer, supports expanded metals, silica gel layer and restriction expanded metals; Deentrainment tower acidolysis exhaust gas inlet down arranges slurries gathering-device;
The import of described acid absorption column acid gas is up provided with successively absorption gas distributor, dry load layer, absorbs sour spray thrower and absorption demist layer;
Described tail gas absorber exhaust gas inlet is up provided with tail air absorbing body distributor successively, tail is inhaled packing layer, tail imbibition spray thrower and tail and absorbed mist layer.
Apply a kind of acidolysis gas recovery system of the application, comprise the interaction flow of two different times;
Flow process in the acid mist outbreak period is as follows: acidolysis waste gas enters deentrainment tower lower space, mainly contact at the rapid ball layer of pickling with the concentrated acid under the spray of pickling spray acid layer, solid material, the acid solution of acid mist outburst wrapped folder are washed down through spray acid elution, gas phase through overpickling enters silica gel layer, in silica gel layer, dry silica gel absorbs moisture content in acid gas; The acid gas of removing moisture content send acid absorption column to absorb through reversal valve, and acid gas is absorbed, and tail gas send tail gas absorber, the toxic emission after tail gas absorber purifies;
Flow process in air stirring phase is at ordinary times as follows: acidolysis waste gas enters deentrainment tower lower space, mainly contact at the rapid ball layer of pickling with the concentrated acid under the spray of pickling spray acid layer, solid material, the acid solution of air stirring wrapped folder are washed down through spray acid elution, gas phase through overpickling enters silica gel layer, in silica gel layer, wet silica gel removes moisture content and becomes dry; Waste gas main component is now exactly air, directly send tail gas absorber, the toxic emission after tail gas absorber purifies.
What pickling was got off send Producing Titanium Dioxide hydrolysis procedure to realize recovery containing raw material underflow liquid.
Silica gel layer at different times in different motion state, in acid mist outbreak period silica gel layer in fluid bed state, in air stirring phase at ordinary times in fixed bed state.
The application be embodied in following some:
(1) absorb moisture in acid mist with silica gel and reach demist effect, then absorb recovered acid with the concentrated sulfuric acid, reach sour recovery;
(2) moisture absorption of silica gel is that acidolysis different times completes respectively with being dried, another spent material and the energy;
(3) the rapid ball layer of pickling is set in deentrainment tower bottom and carries out pickling, acidolysis waste gas is first through pickling, and the solid material of wrapped folder, acid solution are washed down and are recycled through spray acid elution;
(4) implementation result: SO
3the rate of recovery>=99.0%.
Brief description of the drawings
Accompanying drawing 1 is a kind of acidolysis gas recovery system of the application schematic diagram
1-deentrainment tower in Fig. 1,2-reversal valve, 3-acid absorption column, 4-tail gas absorber, 5-acid absorbent recirculation pump, 6-tail gas absorbent recirculation pump, 7-tail gas absorbs rear pump, 8-pickling circulating pump, the rapid ball layer of 9-pickling, 10-pickling spray acid layer, 11-supports expanded metals, 12-silica gel layer, 13-limits expanded metals, and 14-absorbs gas distributor, 15-dry load layer, 16-absorbs sour spray thrower, and 17-absorbs demist layer, 18-tail air absorbing body distributor, 19-tail is inhaled packing layer, 20-tail imbibition spray thrower, and 21-tail is absorbed mist layer; A-acidolysis waste gas, B-purifying exhaust air, C-tail gas absorption liquid, D-sulfate, E-is containing raw material underflow liquid.
Detailed description of the invention
Embodiment 1
As shown in Figure 1, a kind of acidolysis gas recovery system, is one and utilizes acidolysis different times waste gas feature, in the acid mist outbreak period, applies silica gel and absorb moisture in acid mist in fluid bed, and acid gas absorbs recovered acid with the concentrated sulfuric acid; In air stirring phase at ordinary times, application waste gas dry silica gel, waste gas send vent gas treatment again; And before moisture, first washing acidolysis waste gas with the concentrated sulfuric acid in application silica gel absorbs acid mist, washing slurries return the system of acidolysis system recoveries raw material; Described acidolysis gas recovery system absorbs rear pump 7 by deentrainment tower 1, reversal valve 2, acid absorption column 3, tail gas absorber 4, sour absorbent recirculation pump 5, tail gas absorbent recirculation pump 6, tail gas and pickling circulating pump 8 forms.
Described deentrainment tower 1 acidolysis exhaust gas inlet is up provided with successively the rapid ball layer 9 of pickling, pickling spray acid layer 10, supports expanded metals 11, silica gel layer 12 and restriction expanded metals 13; Deentrainment tower 1 acidolysis exhaust gas inlet down arranges slurries gathering-device;
Described acid absorption column 3 acid gas imports are up provided with successively and absorb gas distributor 14, dry load layer 15, absorb sour spray thrower 16 and absorb demist layer 17;
Described tail gas absorber 4 exhaust gas inlet are up provided with tail air absorbing body distributor 18 successively, tail is inhaled packing layer 19, tail imbibition spray thrower 20 and tail and absorbed mist layer 21.
A kind of acidolysis gas recovery system of application the application, comprise the interaction flow of two different times, flow process in the acid mist outbreak period is as follows: acidolysis waste gas A enters deentrainment tower 1 lower space, mainly contact at the rapid ball layer 9 of pickling with the concentrated acid under 10 spray of pickling spray acid layer, solid material, the acid solution of acid mist outburst wrapped folder are washed down through spray acid elution, gas phase through overpickling enters silica gel layer 12 by supporting expanded metals 11, and in silica gel layer 12, dry silica gel absorbs moisture content in acid gas; The acid gas of removing moisture content send acid absorption column 3 through reversal valve 2, in acid absorption column 3 bottoms absorption acid solutions pump into acid absorption column 3 by sour absorbent recirculation pump 5, absorb sour spray thrower 16 and realize circulation, acid gas is through absorbing gas distributor 14 distributing gas, mainly in dry load layer 15, be absorbed, through absorbing demist layer 17, tail gas send tail gas absorber 4 again; In tail gas absorber 4 bottom tail gas absorption liquids pump into tail gas absorber 4 by tail suction circulating pump 6, tail suction spray thrower 20 is realized circulation, tail gas is through tail air absorbing body distributor 18 distributing gas, mainly inhale in packing layer 19 and be absorbed at tail, then absorb mist layer 21 through tail, purifying exhaust air B discharge;
Flow process in air stirring phase is at ordinary times as follows: acidolysis waste gas A enters deentrainment tower 1 lower space, mainly contact at the rapid ball layer 9 of pickling with the concentrated acid under 10 spray of pickling spray acid layer, solid material, the acid solution of air stirring wrapped folder are washed down through spray acid elution, gas phase through overpickling enters silica gel layer 12 by supporting expanded metals 11, in silica gel layer 12, wet silica gel removes moisture content and becomes dry; Waste gas main component is now exactly air, directly send tail gas absorber 4, the toxic emission after tail gas absorber 4 purifies.
Silica gel layer at different times in different motion state, in acid mist outbreak period silica gel layer in being limited to the fluid bed state of restriction expanded metals 13, in air stirring phase at ordinary times in fixed bed state.
The pickle of collecting in deentrainment tower 1 bottom pumps into deentrainment tower 1 pickling by pickling circulating pump 8 and sprays acid layer 10, realizes the circulation of pickle, and what pickling was got off send Producing Titanium Dioxide hydrolysis procedure to realize recovery containing raw material underflow liquid E.
Application the application acidolysis gas recovery system, SO
3the rate of recovery 99.0%.
The invention has the beneficial effects as follows: (1) absorbs moisture in acid mist with silica gel and reaches demist effect, then absorb recovered acid with the concentrated sulfuric acid, reach sour recovery; (2) moisture absorption of silica gel is that acidolysis different times completes respectively with being dried, another spent material and the energy; (3) solid material of waste gas wrapped folder is recycled; (4) implementation result: SO
3the rate of recovery>=99.0%.
The application is not limited to above-mentioned embodiment, those skilled in the art make to any apparent improvement of above-mentioned embodiment or change, can not exceed the protection domain of design of the present invention and claims.
Claims (3)
1. an acidolysis gas recovery system, is one and utilizes acidolysis different times waste gas feature, in the acid mist outbreak period, applies silica gel and absorb moisture in acid mist in fluid bed, and acid gas absorbs recovered acid with the concentrated sulfuric acid again; In air stirring phase at ordinary times, application waste gas dry silica gel, waste gas send vent gas treatment again; And before moisture, first washing acidolysis waste gas with the concentrated sulfuric acid in application silica gel absorbs acid mist, washing slurries return the system of Producing Titanium Dioxide hydrolysis procedure recovery raw material.
2. acidolysis gas recovery system according to claim 1, is characterized in that:
Described acidolysis gas recovery system absorbs rear pump by deentrainment tower, reversal valve, acid absorption column, tail gas absorber, sour absorbent recirculation pump, tail gas absorbent recirculation pump, tail gas and pickling circulating pump forms;
Described deentrainment tower acidolysis exhaust gas inlet is up provided with successively the rapid ball layer of pickling, pickling spray acid layer, supports expanded metals, silica gel layer and restriction expanded metals; Deentrainment tower acidolysis exhaust gas inlet down arranges slurries gathering-device;
The import of described acid absorption column acid gas is up provided with successively absorption gas distributor, dry load layer, absorbs sour spray thrower and absorption demist layer;
Described tail gas absorber exhaust gas inlet is up provided with tail air absorbing body distributor successively, tail is inhaled packing layer, tail imbibition spray thrower and tail and absorbed mist layer.
3. acidolysis gas recovery system according to claim 1, is characterized in that:
Comprise the interaction flow of two different times:
Flow process in the acid mist outbreak period is as follows: acidolysis waste gas enters deentrainment tower lower space, mainly contact at the rapid ball layer of pickling with the concentrated acid under the spray of pickling spray acid layer, solid material, the acid solution of acid mist outburst wrapped folder are washed down through spray acid elution, gas phase through overpickling enters silica gel layer, in silica gel layer, dry silica gel absorbs moisture content in acid gas; The acid gas of removing moisture content send acid absorption column to absorb through reversal valve, and acid gas is absorbed, and tail gas send tail gas absorber, the toxic emission after tail gas absorber purifies;
Flow process in air stirring phase is at ordinary times as follows: acidolysis waste gas enters deentrainment tower lower space, mainly contact at the rapid ball layer of pickling with the concentrated acid under the spray of pickling spray acid layer, solid material, the acid solution of air stirring wrapped folder are washed down through spray acid elution, gas phase through overpickling enters silica gel layer, in silica gel layer, wet silica gel removes moisture content and becomes dry; Waste gas main component is now exactly air, directly send tail gas absorber, the toxic emission after tail gas absorber purifies;
What pickling was got off send Producing Titanium Dioxide hydrolysis procedure to realize recovery containing raw material underflow liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410226401.9A CN104001407B (en) | 2014-05-21 | 2014-05-21 | A kind of method reclaiming acidolysis waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410226401.9A CN104001407B (en) | 2014-05-21 | 2014-05-21 | A kind of method reclaiming acidolysis waste gas |
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| Publication Number | Publication Date |
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| CN104001407A true CN104001407A (en) | 2014-08-27 |
| CN104001407B CN104001407B (en) | 2016-08-17 |
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| CN201410226401.9A Active CN104001407B (en) | 2014-05-21 | 2014-05-21 | A kind of method reclaiming acidolysis waste gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105016308A (en) * | 2015-08-05 | 2015-11-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Device and method for recycling sulfur in acidolysis exhaust gas |
| CN105817133A (en) * | 2016-05-03 | 2016-08-03 | 黄立维 | Device for removing harmful gases and treatment method |
| CN107475759A (en) * | 2017-08-23 | 2017-12-15 | 江苏国电新能源装备有限公司 | A kind of zincincation of acid suppression mist |
| CN108939823A (en) * | 2018-08-28 | 2018-12-07 | 江门市江海区吉安顺化工有限公司 | A kind of Ammonia recovery processing system |
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| CN108939823A (en) * | 2018-08-28 | 2018-12-07 | 江门市江海区吉安顺化工有限公司 | A kind of Ammonia recovery processing system |
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| Publication number | Publication date |
|---|---|
| CN104001407B (en) | 2016-08-17 |
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