CN116764411A - Tail gas treatment system for pyrite sulfuric acid production - Google Patents
Tail gas treatment system for pyrite sulfuric acid production Download PDFInfo
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- CN116764411A CN116764411A CN202310544649.9A CN202310544649A CN116764411A CN 116764411 A CN116764411 A CN 116764411A CN 202310544649 A CN202310544649 A CN 202310544649A CN 116764411 A CN116764411 A CN 116764411A
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- Prior art keywords
- spray
- pipe
- tail gas
- gas treatment
- reaction
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 52
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910052683 pyrite Inorganic materials 0.000 title claims abstract description 20
- 239000011028 pyrite Substances 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 102
- 239000007921 spray Substances 0.000 claims abstract description 98
- 239000007788 liquid Substances 0.000 claims abstract description 63
- 238000000034 method Methods 0.000 claims abstract description 33
- 238000003860 storage Methods 0.000 claims abstract description 17
- 238000012856 packing Methods 0.000 claims abstract description 14
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 10
- 239000011734 sodium Substances 0.000 claims abstract description 10
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 10
- 238000012958 reprocessing Methods 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims description 24
- 230000008929 regeneration Effects 0.000 claims description 15
- 238000011069 regeneration method Methods 0.000 claims description 15
- 238000000429 assembly Methods 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims 1
- 239000003513 alkali Substances 0.000 abstract description 23
- 239000007789 gas Substances 0.000 description 59
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 28
- 239000000243 solution Substances 0.000 description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 230000000694 effects Effects 0.000 description 12
- 239000003595 mist Substances 0.000 description 7
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000000746 purification Methods 0.000 description 6
- 230000000630 rising effect Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000920 calcium hydroxide Substances 0.000 description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000013049 sediment Substances 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 2
- 235000010261 calcium sulphite Nutrition 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 235000010265 sodium sulphite Nutrition 0.000 description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
-
- 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
- B01D53/50—Sulfur oxides
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to the technical field of tail gas treatment equipment, in particular to a tail gas treatment system for preparing sulfuric acid from pyrite, which comprises a spray tower and a spray assembly, wherein the spray assembly comprises a liquid storage tank which is fixedly arranged on the side wall of the spray tower, and a sodium-based desulfurizing agent is filled in the liquid storage tank; the system also comprises a reprocessing component which is arranged in the inner cavity of the spray tower and is used for reusing the spray liquid; the circulating alternating assembly is used for driving the reaction boxes to alternately operate, regenerated alkali liquor passes through the lifting pipe and the lifting piston in the tail gas treatment process, and is recycled at the lower half part of the inner cavity of the spray tower, so that the flowing path of the solution mixed with the replacement liquor does not pass through the spray pipe and the packing layer, and further the scaling of the spray pipe and the packing layer is prevented.
Description
Technical Field
The invention belongs to the technical field of tail gas treatment equipment, and particularly relates to a tail gas treatment system for preparing sulfuric acid from pyrite.
Background
In the industrial sulfuric acid production industry in China, sulfur dioxide is produced by adopting a pyrite calcination mode, and then finished sulfuric acid is produced after a plurality of steps of purification, drying, two-to-two absorption and the like, and tail gas is produced along with the finished sulfuric acid, wherein the discharged tail gas still contains sulfur-containing substances such as sulfur dioxide gas, sulfuric acid mist and the like in a certain proportion and is directly discharged though the tail gas is subjected to multi-step treatment, so that the surrounding environment is seriously influenced.
In the sulfur-containing tail gas treatment process, because sulfur dioxide and a sodium-based desulfurizing agent react fast and have strong adsorption effect, and the sodium-based desulfurizing agent has strong alkalinity, and the generated product after absorbing sulfur dioxide has large solubility and cannot cause supersaturated crystals, the sulfur-containing tail gas treatment process is often used in sulfur-containing tail gas treatment, however, because the sodium-based desulfurizing agent such as sodium hydroxide and the like commonly used in the market has higher raw material price, the tail gas treatment cost is higher, in order to reduce the tail gas treatment cost, the sodium-based desulfurizing agent after absorbing sulfur dioxide is regenerated in the related technology, so that the recycling of the sodium-based desulfurizing agent is realized, and the tail gas treatment cost is further reduced.
In the process of regenerating and recycling the sodium-based desulfurizing agent, the double-alkali method is widely applied, and when the double-alkali method is implemented, cheap calcium hydroxide is adopted to replace sodium hydroxide solution for absorbing sulfur dioxide so as to regenerate sodium hydroxide, however, in the implementation process, the situation that the sodium hydroxide and the calcium hydroxide are mixed and flow back to a tail gas treatment device because the sodium hydroxide and the calcium hydroxide cannot be distinguished in the replacement process is found, and further, in the long-time use process, the scaling condition is serious, the circulating flow of the desulfurizing agent is blocked, and the application effect of the regenerated desulfurizing solution is poor.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
Disclosure of Invention
In order to overcome the defects in the prior art and solve the technical problems, the invention provides a tail gas treatment system for preparing sulfuric acid from pyrite.
The technical scheme adopted for solving the technical problems is as follows: the invention discloses a tail gas treatment system for preparing sulfuric acid from pyrite, which comprises a spray tower and a spray assembly, wherein the spray tower is a cavity type structure body, a gas outlet is formed in the top end of the spray tower, a gas inlet pipe is fixedly arranged at the bottom of the spray tower, the spray assembly is arranged on the spray tower, and the spray assembly is used for carrying out spray treatment on tail gas;
the spraying assembly comprises a liquid storage tank, the liquid storage tank is fixedly arranged on the side wall of the spraying tower, and sodium-based desulfurizing agent is filled in the liquid storage tank;
the top of the inner cavity of the spray tower is provided with at least one group of spray pipes, and the spray pipes are communicated with the inner cavity of the liquid storage tank;
the inner cavity of the spray tower is provided with a packing layer, and the packing layer is positioned right below the spray pipe;
the system also comprises a reprocessing component which is arranged in the inner cavity of the spray tower and is used for reusing the spray liquid;
the reprocessing assembly comprises a reaction box, the reaction box is arranged in the spray tower, and the air inlet pipe extends to the inside of the reaction box;
the drainage plate is fixedly arranged on the inner wall of the spray tower and matched with the reaction box and used for guiding the spray liquid to flow into the reaction box;
the regeneration pipe is fixedly arranged on the spray tower, extends to the upper part of the drainage plate and is used for conveying replacement liquid into the reaction tank;
the lifting pipe is fixedly arranged in the spray tower, the lifting pipe is aligned with the opening of the reaction box, and the lifting piston is slidably arranged in the lifting pipe;
the side wall of the lifting pipe is provided with evenly distributed spraying holes, and the bottom of the lifting pipe and the spraying holes are in one-way conduction;
the number of the reaction boxes is at least two, the circulation and alternation assemblies are connected with the reaction boxes, and the circulation and alternation assemblies are used for driving the reaction boxes to work alternately.
Preferably, the riser is fixedly provided with a laminar flow plate which is uniformly distributed, and the laminar flow plate corresponds to the spraying hole.
Preferably, the number of the laminar flow plates is at least two, the laminar flow plates are all in arc-shaped design, and the lengths of the laminar flow plates arranged from top to bottom are gradually reduced.
Preferably, the circulation alternating assembly comprises a rotating shaft, the rotating shaft is rotatably arranged on the spray tower, and the rotating shaft is externally connected with a driving device;
the mounting seat is fixedly arranged on the rotating shaft, mounting grooves are formed in the mounting seat, and the mounting grooves correspond to the reaction boxes one by one;
the annular plate is fixed on the inner wall of the spray tower and is used for blocking the opening of the reaction box.
Preferably, the mounting seat is provided with a through hole, the through holes extend into the reaction box, the air inlet pipe extends into the through hole, the opening of the air inlet pipe faces upwards, and the air inlet pipe is in sliding sealing connection with the through holes.
Preferably, the liquid outlet pipe is fixedly arranged on the annular plate, and the liquid outlet pipe is arranged at an opening in the inner wall of the annular plate.
Preferably, the liquid outlet pipe is positioned at one side of the spray tower, and the reaction box is communicated with the liquid outlet pipe in the process of rotating from bottom to top.
Preferably, the bottom of the lifting pipe is sleeved with an extension pipe, and the extension pipe is elastically connected with the lifting pipe through a spring.
Preferably, push blocks are fixedly arranged on two sides of the extension pipe, the inclined surfaces of the push blocks are arranged, and the push blocks are in sliding connection with the opening of the reaction box.
The beneficial effects of the invention are as follows:
1. according to the tail gas treatment system for preparing sulfuric acid from pyrite, in the tail gas treatment process, regenerated alkali liquor is recycled through the lifting pipe and the lifting piston at the lower half part of the inner cavity of the spray tower, so that the flowing path of solution mixed with replacement liquor does not pass through the spray pipe and the packing layer, further, scaling of calcium hydroxide and the like mixed in the regenerated liquor in the spray pipe and the packing layer is prevented, and in the tail gas rising process, the tail gas is contacted with the solution in the reaction box, the sprayed regenerated liquor and the sprayed alkali liquor in a bubble form and a gas form, so that multiple purification of the tail gas is realized, and the tail gas treatment effect is effectively enhanced.
2. According to the tail gas treatment system for preparing sulfuric acid from pyrite, the mounting seat is driven to rotate, the reaction box is aligned with the drainage plate again after standing and depositing, and at the moment, the separation effect of the deposited and replaced clear liquid is good because the replacement reaction in the reaction box is finished, so that when the solution in the reaction box is extracted through the lifting pipe, the extraction amount of the deposited and the extracted solution has higher occupation ratio of regenerated alkali liquor, and the purification effect of the rising tail gas is further enhanced.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a partial cross-sectional view of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a partial cross-sectional view of the mounting block and reaction chamber;
FIG. 5 is a partial assembly view of a riser and extension tube;
in the figure: 1. a spray tower; 11. an air inlet pipe; 12. an air outlet; 2. a liquid storage tank; 21. a shower pipe; 22. a filler layer; 23. a reaction box; 24. a drainage plate; 25. a regeneration pipe; 26. a riser; 27. a lifting piston; 28. an injection hole; 29. a laminar flow plate; 3. a rotating shaft; 31. a mounting base; 32. a mounting groove; 33. a ring plate; 4. a via hole; 41. a liquid outlet pipe; 42. an extension tube; 43. and pushing the block.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 5, the tail gas treatment system for pyrite sulfuric acid production comprises a spray tower 1 and a spray assembly, wherein the spray tower 1 is a cavity type structure body, the top end of the spray tower 1 is provided with an air outlet 12, the bottom is fixedly provided with an air inlet pipe 11, the spray assembly is arranged on the spray tower 1, and the spray assembly is used for carrying out spray treatment on tail gas;
the spraying assembly comprises a liquid storage tank 2, the liquid storage tank 2 is fixedly arranged on the side wall of the spraying tower 1, and a sodium-based desulfurizing agent is filled in the liquid storage tank 2;
the top of the inner cavity of the spray tower 1 is provided with at least one group of spray pipes 21, and the spray pipes 21 are communicated with the inner cavity of the liquid storage tank 2;
the packing layer 22 is arranged in the inner cavity of the spray tower 1, and the packing layer 22 is positioned right below the spray pipe 21;
the device also comprises a reprocessing component which is arranged in the inner cavity of the spray tower 1 and is used for reusing the spray liquid;
the reprocessing assembly comprises a reaction box 23, wherein the reaction box 23 is arranged in the spray tower 1, and the air inlet pipe 11 extends into the reaction box 23;
the drainage plate 24 is fixedly arranged on the inner wall of the spray tower 1, and the drainage plate 24 is matched with the reaction box 23 and is used for guiding the spray liquid to flow into the reaction box 23;
a regeneration pipe 25, wherein the regeneration pipe 25 is fixedly arranged on the spray tower 1, the regeneration pipe 25 extends to the upper part of the drainage plate 24, and the regeneration pipe 25 is used for conveying the replacement liquid into the reaction tank 23;
a lifting pipe 26, wherein the lifting pipe 26 is fixedly arranged in the spray tower 1, the lifting pipe 26 is aligned with the opening of the reaction box 23, and a lifting piston 27 is slidably arranged in the lifting pipe 26;
the side wall of the lifting pipe 26 is provided with evenly distributed spraying holes 28, and the bottom of the lifting pipe 26 and the spraying holes 28 are in one-way conduction;
the number of the reaction boxes 23 is at least two, the circulation alternating assemblies are connected with the reaction boxes 23, and the circulation alternating assemblies are used for driving the reaction boxes 23 to work alternately;
in the tail gas treatment process after pyrite calcination, after the tail gas is purified, dried and subjected to two-turn two-absorption, most of sulfur dioxide gas is converted into sulfur trioxide, then finished sulfuric acid is generated and output, part of sulfur dioxide and sulfuric acid mist are discharged outwards together with air in the process, in the process of discharging the tail gas, the tail gas enters the spray tower 1 through the air inlet pipe 11, is purified and filtered in the spray tower 1 and then is discharged into the air, in particular, the tail gas flows in the air inlet pipe 11 and enters the reaction box 23 through the air inlet pipe 11, at the same time, the liquid storage tank 2 is started, alkali liquor stored in the liquid storage tank 2, namely sodium hydroxide solution flows along the spray pipe 21 and is sprayed downwards in a water mist shape through a spray head on the spray pipe 21, the water mist gradually wets the packing layer 22 in the downward movement process, the water drops are converged on the drainage plate 24, the water drops flow into the reaction box 23 along the guide of the drainage plate 24, the gas entering the reaction box 23 gradually moves upwards, so that the water mist alkali liquor and tail gas reversely flow, in the flowing process, the alkali liquor fixes and absorbs sulfur dioxide gas and sulfuric acid mist contained in the tail gas, sodium sulfite and sodium sulfate are generated after the alkali liquor reacts with the sulfur dioxide, the alkali liquor is finally converged in the reaction box 23, the liquid level in the reaction box 23 is finally caused to rise along with the continuous spraying of the alkali liquor, at the moment, replacement liquid, namely calcium hydroxide solution/turbid liquid, is conveyed through the regeneration pipe 25, the replacement liquid reacts with sodium sulfite and sodium sulfate to generate calcium sulfite and calcium sulfate precipitates, and the alkali liquor is regenerated at the same time, so that the reutilization of the alkali liquor is realized, when the height of the solution in the spray tower 1 reaches the opening of the reaction box 23, even when the solution spreads on the drainage plate 24, the bottom of the lifting pipe 26 is plugged by the solution, at the moment, the lifting piston 27 is started, the lifting piston 27 is a piston driven by a hydraulic cylinder, when the lifting piston 27 moves, the lifting piston 27 is in sliding and sealing connection with the inner wall of the lifting pipe 26, negative pressure is generated in the lifting pipe 26 along with the rising of the lifting piston 27, the concentrated solution is acted by the negative pressure, the solution is finally caused to flow into the lifting pipe 26, when the lifting piston 27 moves to the top end, the pressure in the lifting pipe 26 is reversely reset, at the moment, because the spraying hole 28 is formed in the lifting pipe 26, and the spraying hole 28 and the bottom of the lifting pipe 26 are both provided with one-way plugs, so that the spraying hole 28 and the lifting pipe 26 are in one-way conduction, under the action of the pressure, the solution extracted in the lifting pipe 26 is sprayed into the spray tower 1 through the spraying hole 28, and in other embodiments of the invention, the number of the lifting pipes 26 and the lifting pistons 27 is at least two, the lifting pipes 26 and the lifting pistons 27 are uniformly arranged along the opening of the reaction tank 23, and the movement directions of the two adjacent lifting pistons 27 are opposite, so that a group of lifting pipes 26 always exist in the working process of the lifting pistons 27, liquid is sprayed into the spray tower 1, in the process, the air inlet pipe 11 always continuously conveys tail gas into the reaction tank 23, the tail gas rises in the form of continuous small bubbles in the solution in the reaction tank 23, then enters the spray tower 1, contacts with the solution sprayed by the lifting pipes 26, the packing layer 22 and the alkali liquid sprayed by the spray pipe 21 in sequence, sulfur dioxide, sulfuric acid mist and the like contained in the tail gas are effectively removed, and in the process of rising the tail gas, the regeneration liquid sprayed by the solution in the reaction tank 23 and the lifting pipes 26 is purified, the content of sulfur dioxide and other gases in the tail gas is lower, so that the impurity removal pressure of alkali liquor is lower, and the spraying efficiency of the spraying pipe 21 can be properly adjusted during working, so that the output of alkali liquor is reduced.
According to the invention, in the tail gas treatment process, regenerated alkali liquor is circularly used in the lower half part of the inner cavity of the spray tower 1 through the lifting pipe 26 and the lifting piston 27 by arranging the lifting pipe 26 and the lifting piston 27, so that a flow path of solution mixed with replacement liquor does not pass through the spraying pipe 21 and the packing layer 22, further, scaling of calcium hydroxide and the like mixed in the regenerated liquor in the spraying pipe 21 and the packing layer 22 is prevented, the tail gas is contacted with the solution in the reaction tank 23 and the sprayed regenerated liquor and the sprayed alkali liquor in a bubble form and a gas form in the lifting process, multiple purification of the tail gas is further realized, the tail gas treatment effect is effectively enhanced, meanwhile, the regenerated liquor is driven to circulate through the lifting pipe 26 and the lifting piston 27, even if the regenerated liquor is deposited in the lifting pipe 26, a part is difficult to form in continuous lifting movement, the equipment movement obstruction is small, and the device can be maintained regularly after long-time running.
As a preferred embodiment of the present invention, the riser 26 is fixedly provided with a laminar flow plate 29 which is uniformly distributed, and the laminar flow plate 29 corresponds to the spraying hole 28;
by providing the laminar flow plate 29, when the regeneration liquid is sprayed into the spray tower 1 through the spray holes 28, the sprayed regeneration liquid falls on the laminar flow plate 29, is guided and dispersed through the laminar flow plate 29, forms a water curtain in the process of dripping onto the drainage plate 24, contacts with flowing tail gas, and further enhances the absorption effect on impurity gas in the tail gas.
As a preferred embodiment of the present invention, the number of the laminar flow plates 29 is at least two, the laminar flow plates 29 are all arc-shaped, and the lengths of the laminar flow plates 29 arranged from top to bottom are gradually reduced;
through the setting that a plurality of laminar flow board 29 length of even arrangement reduce in proper order, cause laminar flow board 29 when leading to the regeneration liquid, cause the liquid stream of the last whereabouts of laminar flow board 29, misplacement in space, further strengthen the effect of absorbing impurity gas in the tail gas of rising.
As a preferred embodiment of the invention, the circulation alternating assembly comprises a rotating shaft 3, wherein the rotating shaft 3 is rotatably arranged on the spray tower 1, and the rotating shaft 3 is externally connected with driving equipment;
the installation seat 31 is fixedly arranged on the rotating shaft 3, the installation seat 31 is provided with installation grooves 32, and the installation grooves 32 are in one-to-one correspondence with the reaction boxes 23;
the annular plate 33 is fixed on the inner wall of the spray tower 1, and the annular plate 33 is used for blocking the opening of the reaction box 23;
after the replacement liquid is mixed with the alkali liquor absorbing sulfur dioxide, sediment and alkali liquor are generated under the action of the replacement liquid, at this time, the reaction box 23 is switched by a circulation alternating assembly so as to be convenient for sediment and standing, in particular, in the working process, the rotating shaft 3 is rotated once after a period of time by a preset program, and the rotating angle is the same as the arrangement angle of the reaction box 23, so that in the continuous tail gas purification process, after the rotating shaft 3 rotates, the rotating shaft 3 rotates synchronously with a mounting seat 31 fixedly mounted with the rotating shaft 3, the reaction box 23 is driven to rotate, in the rotating process of the reaction box 23, a ring plate 33 is matched with the inner wall of the spray tower 1 to seal the opening of the reaction box 23, the reaction box 23 which stores a large amount of replacement liquid and alkali liquor absorbing sulfur dioxide is dislocated with a drainage plate 24, a new reaction box 23 is in butt joint with the drainage plate 24, the reaction tank 23 which is dislocated with the drainage plate 24, the internal replacement liquid gradually reacts with the calcium sulfite and the calcium sulfate to generate precipitate, the precipitate is gradually deposited under the action of gravity, after the installation seat 31 rotates for one circle, the reaction tank 23 which is subjected to standing and deposition is aligned with the drainage plate 24 again, at this time, as the internal reaction in the reaction tank 23 is completed, the separation effect of the precipitation and the replaced clear liquid is good, when the solution in the reaction tank 23 is extracted through the riser 26, the extraction amount of the precipitate can be reduced, the occupation of regenerated alkali liquor in the extracted solution is higher, the purification effect of the rising tail gas is further enhanced, meanwhile, it is required to know that sealing backing plates are fixedly installed among the reaction tanks 23, so that in the rotating process of the installation seat 31, the sealing backing plates can block the drainage plate 24 after the reaction tank 23 is dislocated with the drainage plate 24, causing the dripping solution to collect on the drainage plate 24 until the drainage plate 24 is again in communication with the opening of the reaction tank 23.
As a preferred embodiment of the present invention, the mounting seat 31 is provided with a through hole 4, the through holes 4 extend into the reaction tank 23, the air inlet pipe 11 extends into the through hole 4, the opening of the air inlet pipe 11 faces upwards, and the air inlet pipe 11 is in sliding sealing connection with the through hole 4;
through setting up via hole 4 to extend intake pipe 11 to in the via hole 4, and intake pipe 11 and spray column 1 fixed connection, consequently at mount pad 31 pivoted in-process, intake pipe 11 remains static, and intake pipe 11 opening up all the time, consequently causes intake pipe 11 to switch on with up reaction tank 23 all the time, and then the flow of guarantee tail gas.
As a preferred embodiment of the present invention, the annular plate 33 is fixedly provided with a liquid outlet pipe 41, and the liquid outlet pipe 41 is arranged at an opening on the inner wall of the annular plate 33;
by arranging the liquid outlet pipe 41, the sediment is gradually deposited in the reaction tank 23 along with the continuous progress of the reaction, and the bonding strength between the sediment and the reaction tank 23 is lower at the moment, so that after the solution in the reaction tank 23 is kept still, the opening of the reaction tank 23 is aligned with the liquid outlet pipe 41 in the rotating process of the reaction tank 23, at the moment, part of the solution at the opening of the reaction tank 23 flows into the liquid outlet pipe 41, and then the sediment is wrapped and discharged into the liquid outlet pipe 41 and is discharged into an external sedimentation tank through the liquid outlet pipe 41.
As a preferred embodiment of the present invention, the liquid outlet pipe 41 is located at one side of the spray tower 1, and the reaction tank 23 is communicated with the liquid outlet pipe 41 in the process of rotating from bottom to top;
through making reaction box 23 from bottom to top pivoted in-process, switch on with drain pipe 41, on the one hand, when reaction box 23 from bottom to top rotated, the reaction box 23 rotation angle at this moment is great, and the time of standing is longer, is convenient for deposit subsides in the reaction box 23, and then is convenient for discharge the deposit to the outside, on the other hand through the speed and the orificial size of drain pipe 41 when adjusting the periodic rotation of reaction box 23, can effectually adjust at single rotation in-process, what the reaction box 23 flowing back content, avoids regeneration liquid to run off in a large number, causes unnecessary waste.
As a preferred embodiment of the present invention, an extension tube 42 is sleeved at the bottom of the riser 26, and the extension tube 42 is elastically connected with the riser 26 through a spring;
by arranging the extension pipe 42 and elastically connecting the extension pipe 42 with the lifting pipe 26, the extension pipe 42 extends to the inside of the reaction tank 23 under the elastic action of the spring at the moment after the reaction tank 23 periodically rotates and the drainage plates 24 are aligned, and when the lifting piston 27 moves, the effect of extracting the solution in the reaction tank 23 is enhanced due to the existence of the extension pipe 42.
As a preferred embodiment of the present invention, push blocks 43 are fixedly installed on both sides of the extension pipe 42, the push blocks 43 are inclined, and the push blocks 43 are slidably connected with the opening of the reaction tank 23;
when the pushing block 43 is arranged, the opening of the reaction box 23 is contacted with the pushing block 43 firstly when the reaction box 23 rotates, pushing force is given to the pushing block 43 along the rotating direction, the inclined surface of the pushing block 43 breaks down the pushing force, the pushing block 43 and the extension pipe 42 are further promoted to move towards the lifting pipe 26, the extension pipe 42 and the reaction box 23 are further misplaced, and after the opening of the next reaction box 23 is aligned with the drainage plate 24, the extension pipe 42 extends into the reaction box 23 again under the action of a spring.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a be used for pyrite to make sulfuric acid tail gas processing system, includes spray column (1) and spray assembly, spray column (1) is cavity formula structure, gas outlet (12) have been seted up on spray column (1) top, bottom fixed mounting has intake pipe (11), spray assembly installs on spray column (1), spray assembly is used for carrying out spray treatment to tail gas;
the spraying assembly comprises a liquid storage tank (2), the liquid storage tank (2) is fixedly arranged on the side wall of the spraying tower (1), and a sodium-based desulfurizing agent is filled in the liquid storage tank (2);
the top of the inner cavity of the spray tower (1) is provided with at least one group of spray pipes (21), and the spray pipes (21) are communicated with the inner cavity of the liquid storage tank (2);
the inner cavity of the spray tower (1) is provided with a packing layer (22), and the packing layer (22) is positioned under the spray pipe (21);
the method is characterized in that: the device also comprises a reprocessing component which is arranged in the inner cavity of the spray tower (1) and is used for reusing the spray liquid;
the reprocessing assembly comprises a reaction box (23), wherein the reaction box (23) is arranged in the spray tower (1), and the air inlet pipe (11) extends to the inside of the reaction box (23);
the drainage plate (24) is fixedly arranged on the inner wall of the spray tower (1), and the drainage plate (24) is matched with the reaction box (23) and used for guiding the spray liquid to flow into the reaction box (23);
the regeneration pipe (25) is fixedly arranged on the spray tower (1), the regeneration pipe (25) extends to the upper part of the drainage plate (24), and the regeneration pipe (25) is used for conveying replacement liquid into the reaction tank (23);
the lifting pipe (26) is fixedly arranged in the spray tower (1), the lifting pipe (26) is aligned with the opening of the reaction box (23), and a lifting piston (27) is slidably arranged in the lifting pipe (26);
the side wall of the lifting pipe (26) is provided with evenly distributed spraying holes (28), and the bottom of the lifting pipe (26) and the spraying holes (28) are in one-way conduction;
the number of the reaction boxes (23) is at least two, the circulation and alternation assemblies are connected with the reaction boxes (23), and the circulation and alternation assemblies are used for driving the reaction boxes (23) to work alternately.
2. A tail gas treatment system for pyrite-based sulfuric acid production according to claim 1, characterized in that: and the riser (26) is fixedly provided with a laminar flow plate (29) which is uniformly distributed, and the laminar flow plate (29) corresponds to the spraying hole (28).
3. A tail gas treatment system for pyrite-based sulfuric acid production according to claim 2, characterized in that: the number of the laminar flow plates (29) is at least two, the laminar flow plates (29) are all in arc-shaped design, and the lengths of the laminar flow plates (29) arranged from top to bottom are gradually reduced.
4. A tail gas treatment system for pyrite-based sulfuric acid production according to claim 3, characterized in that: the circulating alternating assembly comprises a rotating shaft (3), the rotating shaft (3) is rotatably arranged on the spray tower (1), and the rotating shaft (3) is externally connected with driving equipment;
the device comprises a mounting seat (31), wherein the mounting seat (31) is fixedly arranged on the rotating shaft (3), mounting grooves (32) are formed in the mounting seat (31), and the mounting grooves (32) are in one-to-one correspondence with the reaction boxes (23);
the annular plate (33), the inner wall of the spray tower (1) is fixed with the annular plate (33), and the annular plate (33) is used for blocking the opening of the reaction box (23).
5. A tail gas treatment system for pyrite-based sulfuric acid production according to claim 4, wherein: the utility model discloses a reaction tank, including mount pad (31), inlet tube (11), connecting hole (4) have been seted up on mount pad (31), in all extending to reaction tank (23) through hole (4), in inlet tube (11) extend to connecting hole (4), and inlet tube (11) opening is upwards, inlet tube (11) and connecting hole (4) sliding seal connect.
6. A tail gas treatment system for pyrite-based sulfuric acid production according to claim 5, wherein: the liquid outlet pipe (41) is fixedly arranged on the annular plate (33), and the liquid outlet pipe (41) is arranged at an opening in the inner wall of the annular plate (33).
7. A tail gas treatment system for pyrite-based sulfuric acid production according to claim 6, characterized in that: the liquid outlet pipe (41) is positioned at one side of the spray tower (1), and the reaction box (23) is communicated with the liquid outlet pipe (41) in the process of rotating from bottom to top.
8. A tail gas treatment system for pyrite-based sulfuric acid production according to claim 7, wherein: an extension pipe (42) is sleeved at the bottom of the lifting pipe (26), and the extension pipe (42) is elastically connected with the lifting pipe (26) through a spring.
9. A tail gas treatment system for pyrite-based sulfuric acid production according to claim 8, characterized in that: push blocks (43) are fixedly arranged on two sides of the extension pipe (42), inclined surfaces of the push blocks (43) are arranged, and the push blocks (43) are in sliding connection with the opening of the reaction box (23).
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| Application Number | Priority Date | Filing Date | Title |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310544649.9A CN116764411B (en) | 2023-05-15 | 2023-05-15 | Tail gas treatment system for pyrite sulfuric acid production |
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| CN116764411B CN116764411B (en) | 2023-12-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117085483A (en) * | 2023-10-16 | 2023-11-21 | 汇舸(南通)环保设备有限公司 | Marine spray decarbonization system |
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| KR102311452B1 (en) * | 2021-08-18 | 2021-10-08 | 윤창진 | Single tower multi-stage chemical liquid cleaning deodorizing device with function to prevent mixing of flying chemicals floating by blowing pressure |
| WO2022016725A1 (en) * | 2020-07-20 | 2022-01-27 | 清远市嘉禾稀有金属有限公司 | Suction-type ore-dissolving acid mist spraying tower |
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| US5565180A (en) * | 1987-03-02 | 1996-10-15 | Turbotak Inc. | Method of treating gases |
| JP2006255629A (en) * | 2005-03-18 | 2006-09-28 | Mitsubishi Heavy Ind Ltd | Flue gas desulfurization apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116764411B (en) | 2023-12-29 |
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