CN111847396A - Control device for preparing acid from sulfur-containing wastewater - Google Patents
Control device for preparing acid from sulfur-containing wastewater Download PDFInfo
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- CN111847396A CN111847396A CN202010792196.8A CN202010792196A CN111847396A CN 111847396 A CN111847396 A CN 111847396A CN 202010792196 A CN202010792196 A CN 202010792196A CN 111847396 A CN111847396 A CN 111847396A
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- inner cavity
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- 239000002351 wastewater Substances 0.000 title claims abstract description 42
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 37
- 239000011593 sulfur Substances 0.000 title claims abstract description 37
- 239000002253 acid Substances 0.000 title claims abstract description 28
- 238000010521 absorption reaction Methods 0.000 claims abstract description 60
- 238000002485 combustion reaction Methods 0.000 claims abstract description 37
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000001035 drying Methods 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 238000011010 flushing procedure Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 61
- 239000007789 gas Substances 0.000 claims description 58
- 238000005406 washing Methods 0.000 claims description 33
- 238000006386 neutralization reaction Methods 0.000 claims description 22
- 229910052760 oxygen Inorganic materials 0.000 claims description 17
- 239000001301 oxygen Substances 0.000 claims description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 16
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 12
- 235000019738 Limestone Nutrition 0.000 claims description 8
- 239000006028 limestone Substances 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 5
- 239000005864 Sulphur Substances 0.000 claims description 4
- 239000002250 absorbent Substances 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 3
- 239000002274 desiccant Substances 0.000 claims description 3
- 238000010892 electric spark Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims 2
- 238000000889 atomisation Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 42
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 41
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 6
- 239000003595 mist Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- HIFJUMGIHIZEPX-UHFFFAOYSA-N sulfuric acid;sulfur trioxide Chemical compound O=S(=O)=O.OS(O)(=O)=O HIFJUMGIHIZEPX-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910001868 water Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
- C01B17/76—Preparation by contact processes
- C01B17/80—Apparatus
- C01B17/806—Absorbers; Heat exchangers
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
- C01B17/76—Preparation by contact processes
- C01B17/80—Apparatus
Abstract
The invention discloses a control device for preparing acid from sulfur-containing wastewater, which relates to the technical field of preparing acid from sulfur-containing wastewater, and comprises a combustion furnace, a flushing tower, a drying chamber, a conversion pipe and an absorption box, wherein the top of the combustion furnace is provided with a first connecting pipe communicated with the left side wall of a primary flushing tower, the top of the flushing tower is provided with a second communicating pipe extending into the bottom of an inner cavity of the drying chamber, the right side of the top of the drying chamber is provided with a third communicating pipe communicated with the conversion pipe, the right side of the drying chamber is provided with a fourth communicating pipe communicated with the absorption box, and the second communicating pipe is provided with an air pump. The invention can carry out acid making treatment on the sulfur-containing wastewater, can effectively treat the wastewater, protect the environment, utilize wastes, improve the yield of industrial sulfuric acid and has good effect in the field of sulfur-containing organic wastewater treatment.
Description
Technical Field
The invention relates to the technical field of acid preparation from sulfur-containing wastewater, in particular to a control device for acid preparation from sulfur-containing wastewater.
Background
In partial wastewater containing organic matters, sulfur is also an important pollution element, which can cause great influence on the environment, and the treatment of sulfur in wastewater is an important item in the wastewater treatment process. In the treatment of the sulfur element, the sulfur element is one of the raw materials of the sulfuric acid, so that the sulfur element in the wastewater is converted into the sulfuric acid for treatment, the wastewater can be effectively treated, the waste can be utilized, and the yield of the industrial sulfuric acid is improved.
Disclosure of Invention
The invention provides a control device for preparing acid from sulfur-containing wastewater, and mainly aims to perform acid preparation treatment on the sulfur-containing wastewater, effectively treat the wastewater, protect the environment, utilize wastes and improve the yield of industrial sulfuric acid.
In order to achieve the purpose, the invention adopts the technical scheme that:
the top of the combustion furnace is provided with a first connecting pipe communicated with the left side wall of the first-level washing tower, the top of the washing tower is provided with a second communicating pipe extending into the bottom of the inner cavity of the drying chamber, the right side of the top of the drying chamber is provided with a third communicating pipe communicated with the conversion pipe, the right side of the drying chamber is provided with a fourth communicating pipe communicated with the absorption box, and the second communicating pipe is provided with an air pump.
Preferably, the left side wall of the combustion furnace is provided with a wastewater inlet pipe extending into the inner cavity of the combustion furnace, the top of the inner cavity of the combustion furnace is provided with a first transverse plate provided with a through hole, the bottom of the first transverse plate is provided with a first atomizing nozzle communicated with the wastewater inlet pipe, the left side wall and the right side wall of the combustion furnace are symmetrically provided with gas inlet pipes extending into the inner cavity of the combustion furnace, one end of each gas inlet pipe extending into the combustion furnace is provided with a nozzle with an electric spark igniter, and the bottom of the combustion furnace is provided with an air blower.
Based on the technical characteristics, the sulfur-containing wastewater is atomized and combusted in the combustion furnace and decomposed into gas mainly containing sulfur dioxide, carbon dioxide and water.
Preferably, the distance between the left group and the right group of the gas inlet pipes on the same height is gradually reduced along with the reduction of the height.
Based on above-mentioned technical characteristic, fully burn the first atomizer spun sulphur-containing waste water, improve the degree of burning.
Preferably, the left side wall of washing tower is provided with the flush fluid and advances the pipe, be provided with the second diaphragm of seting up the through-hole between the inner chamber lateral wall of washing tower, the bottom of second diaphragm is provided with second atomizer, the left side wall bottom of washing tower is provided with the overflow pipe, the inner chamber left side wall of washing tower is provided with two sets of upper and lower liquid level inductive switch that are higher than the overflow pipe, be provided with criss-cross defroster between the inner chamber top left and right sides wall of washing tower, the bottom of washing tower is provided with the fluid-discharge tube, be provided with on the fluid-discharge tube with the first solenoid valve of the liquid level inductive switch electric connection of top, be provided with on the overflow pipe with the second solenoid valve of the liquid level inductive.
Based on the technical characteristics, after the gas is combusted in the combustion furnace, the gas entering the washing tower contains solid particles and acid mist, and the gas is sprayed and washed by the washing tower to remove the solid particles and the acid mist in the gas.
Preferably, the drying agent in the inner cavity of the drying chamber uses concentrated sulfuric acid solution, and the air outlet end at the bottom of the second communicating pipe extends below the liquid level of the concentrated sulfuric acid solution.
Based on the technical characteristics, because sulfur dioxide needs to be reserved in the gas needing to be dried, an acidic concentrated sulfuric acid solution is selected for dehydration and drying.
Preferably, the top left side of converter pipe is provided with the sulphur gas and advances the pipe, the bottom left side of converter pipe is provided with oxygen and advances the pipe, the inner chamber of converter pipe is provided with the gas mixing passageway, the inner chamber of gas mixing passageway is provided with the catalyst layer that the vanadic anhydride constitutes, the sulphur gas advances to manage and oxygen advances to all be provided with air heater on the pipe.
Based on the technical characteristics, sulfur dioxide entering the conversion tube is mixed with oxygen, and can generate sulfur trioxide under normal pressure at a certain temperature under the catalytic action of vanadium pentoxide.
Preferably, the air heater heats the gas in the sulfur-containing gas inlet pipe and the oxygen inlet pipe at the temperature of 450-500 ℃.
Based on the technical characteristics, the temperature required for generating sulfur trioxide under the catalytic action of vanadium pentoxide is between 450 ℃ and 500 ℃ after sulfur dioxide and oxygen are mixed under normal pressure.
Preferably, the inner chamber of the absorption box is sequentially provided with a first absorption tank, a second absorption tank and a neutralization tank from left to right, a fifth communicating pipe is arranged between the first absorption tank and the second absorption tank, a sixth communicating pipe is arranged between the second absorption tank and the neutralization tank, the top of the first absorption tank is provided with a first liquid inlet pipe, the bottom of the first absorption tank is provided with a first liquid outlet pipe, the top of the second absorption tank is provided with a second liquid inlet pipe, the bottom of the second absorption tank is provided with a second liquid outlet pipe, the top of the neutralization tank is provided with a third liquid inlet pipe, the bottom of the neutralization tank is provided with a third liquid outlet pipe, and the top of the right side wall of the neutralization tank is provided with an exhaust pipe.
Based on above-mentioned technical characteristics, sulfur trioxide absorbs through first absorption tank and second absorption tank after getting into the absorption tank, and partial remaining sulfur dioxide and sulfur trioxide absorb in the jar of neutralization, contain the amount of acid gas sulfur dioxide and sulfur trioxide in the reduction blast pipe combustion gas, environmental protection.
Preferably, the absorbents in the inner cavities of the first absorption tank and the second absorption tank adopt a concentrated sulfuric acid solution with the mass fraction of 98%, and the neutralizer in the inner cavity of the neutralization tank adopts a limestone solution.
Based on the technical characteristics, the sulfur trioxide forms fuming sulfuric acid after being absorbed by adopting the concentrated sulfuric acid with the mass fraction of 98%, and can be diluted according to the use requirement, and the sulfur dioxide and the sulfur trioxide are acid gases, so that the sulfur dioxide and the sulfur trioxide can be absorbed by alkaline limestone solution, and the limestone solution is low in price and low in production cost.
Compared with the prior art, the invention has the following beneficial effects:
1. by the reasonable design of the combustion furnace, the washing tower, the drying chamber, the conversion pipe and the absorption box, the sulfur-containing wastewater can be atomized and combusted to prepare industrial raw material sulfuric acid, so that the wastewater can be effectively treated, the environment is protected, the waste can be utilized, and the yield of the industrial sulfuric acid is improved;
2. according to the invention, through reasonable design of the washing tower, the washing liquid is discharged from the inner cavity of the washing tower, and meanwhile, the gas mixed with impurities from the outside is prevented from entering the washing tower, so that the gas is protected from being cleaned.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a burner according to the present invention;
FIG. 3 is a schematic diagram of the structure of a rinse column of the present invention;
FIG. 4 is a schematic structural view of a reformer tube according to the present invention;
FIG. 5 is a schematic view showing the structure of the absorption tank of the present invention.
In the figure: 1-a combustion furnace; 101-a wastewater inlet pipe; 102-a first cross plate; 103-a first atomizer; 104-a gas inlet pipe; 105-a nozzle; 106-a blower; 2-washing the tower; 201-flushing liquid inlet pipe; 202-a second transverse plate; 203-a second atomizer; 204-an overflow pipe; 205-liquid level sensing switch; 206-a demister; 207-drain pipe; 208-a first solenoid valve; 209-a second solenoid valve; 3-a drying chamber; 4-a conversion tube; 401-sulfur containing gas inlet pipe; 402-oxygen inlet pipe; 403-gas mixing channels; 404-a catalyst layer; 405-an air heater; 5-an absorption tank; 501-a first absorption tank; 502-a second canister; 503-neutralization tank; 504-fifth communication tube; 505 — a sixth communication pipe; 506-a first liquid inlet pipe; 507-a first liquid outlet pipe; 508-a second liquid inlet pipe; 509-a second outlet pipe; 510-a third liquid inlet pipe; 511-a third liquid outlet pipe; 512-exhaust pipe; 6-a first communicating pipe; 7-a second communicating pipe; 8-a third communicating pipe; 9-a fourth communicating pipe; 10-air pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The invention discloses a control device for preparing acid from sulfur-containing wastewater, which comprises a combustion furnace 1, a flushing tower 2, a drying chamber 3, a conversion pipe 4 and an absorption box 5, wherein the top of the combustion furnace 1 is provided with a first connecting pipe 6 communicated with the left side wall of a first-stage flushing tower 2, the top of the flushing tower 2 is provided with a second communicating pipe 7 extending into the bottom of an inner cavity of the drying chamber 3, the right side of the top of the drying chamber 3 is provided with a third communicating pipe 8 communicated with the conversion pipe 4, the right side of the drying chamber 3 is provided with a fourth communicating pipe 9 communicated with the absorption box 5, and the second communicating pipe 7 is provided with an air pump 10, which is referred to the attached drawing 1 of the.
The left side wall of the combustion furnace 1 is provided with a wastewater inlet pipe 101 extending into the inner cavity of the combustion furnace 1, the top of the inner cavity of the combustion furnace 1 is provided with a first transverse plate 102 provided with a through hole, the bottom of the first transverse plate 102 is provided with a first atomizing nozzle 103 communicated with the wastewater inlet pipe 101, the left side wall and the right side wall of the combustion furnace 1 are symmetrically provided with a gas inlet pipe 104 extending into the inner cavity of the combustion furnace 1, one end of the gas inlet pipe 104 extending into the combustion furnace 1 is provided with a nozzle 105 provided with an electric spark igniter, the bottom of the combustion furnace 1 is provided with an air blower 106, sulfur-containing wastewater is atomized and combusted in the combustion furnace 1 and decomposed into sulfur dioxide, carbon dioxide and water as.
The distance between the left group and the right group of the gas inlet pipes 104 on the same height is gradually reduced along with the reduction of the height, the sulfur-containing wastewater sprayed by the first atomizing nozzle 103 is fully combusted, and the combustion degree is improved, referring to the attached figure 2 of the specification.
A washing liquid inlet pipe 201 is arranged on the left side wall of the washing tower 2, a second transverse plate 202 with a through hole is arranged between the side walls of the inner cavity of the washing tower 2, a second atomizing nozzle 203 is arranged at the bottom of the second transverse plate 202, an overflow pipe 204 is arranged at the bottom of the left side wall of the washing tower 2, an upper liquid level induction switch and a lower liquid level induction switch 205 which are higher than the overflow pipe 204 are arranged on the left side wall of the inner cavity of the washing tower 2, a crossed demister 206 is arranged between the left side wall and the right side wall of the top of the inner cavity of the washing tower 2, a liquid discharge pipe 207 is arranged at the bottom of the washing tower 2, a first electromagnetic valve 208 which is electrically connected with the upper liquid level induction switch 205 is arranged on the liquid discharge pipe 207, a second electromagnetic valve 209 which is electrically connected with the lower liquid level induction switch 205 is arranged on the overflow pipe 204, removing solid particles and acid mist in the gas, and referring to the attached figure 3 of the specification.
Concentrated sulfuric acid solution is used as the drying agent in the inner cavity of the drying chamber 3, the air outlet end at the bottom of the second communicating pipe 7 extends below the liquid level of the concentrated sulfuric acid solution, and sulfur dioxide needs to be reserved in the gas needing to be dried, so that the acidic concentrated sulfuric acid solution is selected for dewatering and drying, and the attached drawing of the specification and figure 1 are referred.
The left side of the top of the conversion pipe 4 is provided with a sulfur-containing gas inlet pipe 401, the left side of the bottom of the conversion pipe 4 is provided with an oxygen inlet pipe 402, the inner cavity of the conversion pipe 4 is provided with a gas mixing channel 403, the inner cavity of the gas mixing channel 403 is provided with a catalyst layer 404 consisting of vanadium pentoxide, the sulfur-containing gas inlet pipe 401 and the oxygen inlet pipe 402 are both provided with air heaters 405, sulfur dioxide entering the conversion pipe 4 is mixed with oxygen, and at a certain temperature, under the catalytic action of the vanadium pentoxide, sulfur trioxide can be generated at normal pressure, refer to the attached drawing figure 4 of the specification.
The temperature of the air heater 405 for heating the gases in the sulfur-containing gas inlet pipe 401 and the oxygen inlet pipe 402 is 450-500 ℃, and the temperature required for generating sulfur trioxide under the catalytic action of vanadium pentoxide after mixing sulfur dioxide and oxygen under normal pressure is 450-500 ℃.
A first absorption tank 501, a second absorption tank 502 and a neutralization tank 503 are sequentially arranged in the inner cavity of the absorption box 5 from left to right, a fifth communicating pipe 504 is arranged between the first absorption tank 501 and the second absorption tank 502, a sixth communicating pipe 505 is arranged between the second absorption tank 502 and the neutralization tank 503, a first liquid inlet pipe 506 is arranged at the top of the first absorption tank 501, a first liquid outlet pipe 507 is arranged at the bottom of the first absorption tank 501, a second liquid inlet pipe 508 is arranged at the top of the second absorption tank 502, a second liquid outlet pipe 509 is arranged at the bottom of the second absorption tank 502, a third liquid inlet pipe 510 is arranged at the top of the neutralization tank 503, a third liquid outlet pipe 511 is arranged at the bottom of the neutralization tank 503, an exhaust pipe 512 is arranged at the top of the right side wall of the neutralization tank 503, after the sulfur trioxide enters the absorption box 5, the sulfur trioxide and the sulfur trioxide are absorbed by the first absorption tank 501 and the second absorption tank 502, and part of the residual sulfur trioxide are absorbed in the neutralization, the amount of acid gases such as sulfur dioxide and sulfur trioxide in the gas discharged from the exhaust pipe 512 is reduced, and the environment is protected, referring to the attached figure 5 of the specification.
The absorbents in the inner cavities of the first absorption tank 501 and the second absorption tank 502 adopt concentrated sulfuric acid solution with the mass fraction of 98%, the neutralizer in the inner cavity of the neutralization tank 503 adopts limestone solution, sulfur trioxide adopts concentrated sulfuric acid with the mass fraction of 98% to form fuming sulfuric acid after absorption, and then the fuming sulfuric acid can be diluted according to the use requirement, as sulfur dioxide and sulfur trioxide are acid gases, the basic limestone solution can be used for absorption, and the limestone solution is low in price and low in production cost, and refer to the attached figure 5 of the specification.
In the using process of the invention, the sulfur-containing wastewater sequentially undergoes five steps of atomizing combustion, spraying dust removal, dewatering and drying, sulfur dioxide catalytic conversion and sulfuric acid absorption:
atomizing and burning: after entering the combustion furnace 1 through the wastewater inlet pipe 101, the sulfur-containing wastewater is atomized and sprayed out by the first atomizing nozzle 104, the fuel gas entering through the fuel gas inlet pipe 104 is ignited and combusted by the nozzle 105, so that the atomized wastewater is fully combusted, oxygen in the air is provided for supporting combustion by starting the blower 106, gas mainly comprising sulfur dioxide, carbon dioxide and water is formed, and the gas enters the washing tower 2 through the first communication pipe 6;
spraying and dedusting: the gas that gets into in the purge tower 2 contains solid particle and the acid mist after the burning, advances the pipe 201 by the flush fluid and introduces the flush fluid, after second atomizer 203 blowout, forms air current and the atomizing liquid that moves in opposite directions, absorbs solid particle and the acid mist in the gas, gets into drying chamber 3 through second communicating pipe 7 after the defroster 206 gets rid of most liquid. After the flushing liquid at the bottom of the inner cavity of the flushing tower 2 is collected, the first electromagnetic valve 208 and the second electromagnetic valve 209 are closed, when the liquid level reaches the liquid level sensor 205 below, the second electromagnetic valve 209 on the overflow pipe 204 is opened, and the overflow pipe 204 discharges the liquid; when the liquid level reaches the liquid level sensor 205 above, the first electromagnetic valve 208 on the liquid discharge pipe 207 is opened, the liquid discharge pipe 207 discharges liquid, the liquid is ensured to be filled below the liquid level sensor 205 below the inner cavity of the washing tower 2 in the spraying process, and gas containing foreign matters outside is prevented from entering the inner cavity of the washing tower 2 through the overflow pipe 204 and the liquid discharge pipe 207;
dewatering and drying: the gas entering the drying chamber 3 is introduced into concentrated sulfuric acid through a second communicating pipe 7, and the gas after the concentrated sulfuric acid absorbs water enters a conversion pipe 4 through a third communicating pipe 8;
catalytic conversion of sulfur dioxide: gas containing sulfur dioxide enters a gas mixing channel 403 through a sulfur-containing gas inlet pipe 401 and oxygen enters a gas mixing channel 402 through an oxygen inlet pipe 402 to be mixed, and is heated to 450 ℃ and 500 ℃ through an air heater 405 before mixing and an air heater 405, and then the sulfur dioxide is catalyzed into sulfur trioxide in the gas mixing channel 403 through a catalyst layer 404 consisting of vanadium pentoxide;
sulfuric acid absorption: the gas containing sulfur trioxide entering the absorption box 5 through the fourth communicating pipe 9 is absorbed by the concentrated sulfuric acid solution with the mass fraction of 98% in the first absorption tank 501 and the second absorption tank 502 to form fuming sulfuric acid, and partial residual sulfur dioxide and sulfur trioxide are absorbed by the limestone solution in the neutralization tank 503, so that the amount of acid gas sulfur dioxide and sulfur trioxide contained in the gas discharged from the exhaust pipe 512 is reduced, and the environment is protected.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. The utility model provides a control device of sour system of sulphur waste water which characterized in that: the device comprises a combustion furnace (1), a washing tower (2), a drying chamber (3), a conversion pipe (4) and an absorption box (5), wherein a first connecting pipe (6) communicated with the left side wall of the primary washing tower (2) is arranged at the top of the combustion furnace (1), a second communicating pipe (7) extending into the bottom of an inner cavity of the drying chamber (3) is arranged at the top of the washing tower (2), a third communicating pipe (8) communicated with the conversion pipe (4) is arranged at the right side of the top of the drying chamber (3), a fourth communicating pipe (9) communicated with the absorption box (5) is arranged at the right side of the drying chamber (3), and an air pump (10) is arranged on the second communicating pipe (7).
2. The control device for producing acid from sulfur-containing wastewater according to claim 1, wherein: the left side wall of the combustion furnace (1) is provided with a wastewater inlet pipe (101) extending into the inner cavity of the combustion furnace (1), the top of the inner cavity of the combustion furnace (1) is provided with a first transverse plate (102) provided with a through hole, the bottom of the first transverse plate (102) is provided with a first atomizing nozzle (103) communicated with the wastewater inlet pipe (101), the left side wall and the right side wall of the combustion furnace (1) are symmetrically provided with gas inlet pipes (104) extending into the inner cavity of the combustion furnace (1), one end of each gas inlet pipe (104) extending into the combustion furnace (1) is provided with a nozzle (105) with an electric spark igniter, and the bottom of the combustion furnace (1) is provided with an air blower (106).
3. The control device for producing acid from sulfur-containing wastewater according to claim 2, wherein: the distance between the left group and the right group of the gas inlet pipes (104) on the same height is gradually reduced along with the reduction of the height.
4. The control device for producing acid from sulfur-containing wastewater according to claim 1, wherein: a flushing liquid inlet pipe (201) is arranged on the left side wall of the flushing tower (2), a second transverse plate (202) provided with a through hole is arranged between the side walls of the inner cavity of the flushing tower (2), a second atomization nozzle (203) is arranged at the bottom of the second transverse plate (202), an overflow pipe (204) is arranged at the bottom of the left side wall of the washing tower (2), an upper liquid level induction switch and a lower liquid level induction switch (205) which are higher than the overflow pipe (204) are arranged on the left side wall of the inner cavity of the washing tower (2), a crossed demister (206) is arranged between the left side wall and the right side wall of the top of the inner cavity of the washing tower (2), a liquid discharge pipe (207) is arranged at the bottom of the washing tower (2), a first electromagnetic valve (208) electrically connected with a liquid level induction switch (205) above the liquid discharge pipe (207) is arranged on the liquid discharge pipe (207), and a second electromagnetic valve (209) electrically connected with a liquid level sensing switch (205) below is arranged on the overflow pipe (204).
5. The control device for producing acid from sulfur-containing wastewater according to claim 1, wherein: the drying agent in the inner cavity of the drying chamber (3) uses concentrated sulfuric acid solution, and the air outlet end at the bottom of the second communicating pipe (7) extends below the liquid level of the concentrated sulfuric acid solution.
6. The control device for producing acid from sulfur-containing wastewater according to claim 1, wherein: the top left side of conversion pipe (4) is provided with sour gas and advances pipe (401), the bottom left side of conversion pipe (4) is provided with oxygen and advances pipe (402), the inner chamber of conversion pipe (4) is provided with gas mixing passageway (403), the inner chamber of gas mixing passageway (403) is provided with catalyst layer (404) that the vanadic anhydride is constituteed, sour gas advances pipe (401) and oxygen and advances all to be provided with air heater (405) on pipe (402).
7. The control device for producing acid from sulfur-containing wastewater according to claim 6, wherein: the temperature of the air heater (405) for heating the gas in the sulfur-containing gas inlet pipe (401) and the oxygen inlet pipe (402) is 450-500 ℃.
8. The control device for producing acid from sulfur-containing wastewater according to claim 1, wherein: the inner cavity of the absorption box (5) is sequentially provided with a first absorption tank (501), a second absorption tank (502) and a neutralization tank (503) from left to right, a fifth communicating pipe (504) is arranged between the first absorption tank (501) and the second absorption tank (502), a sixth communicating pipe (505) is arranged between the second absorption tank (502) and the neutralization tank (503), the top of the first absorption tank (501) is provided with a first liquid inlet pipe (506), a first liquid outlet pipe (507) is arranged at the bottom of the first absorption tank (501), the top of the second absorption tank (502) is provided with a second liquid inlet pipe (508), the bottom of the second absorption tank (502) is provided with a second liquid outlet pipe (509), a third liquid inlet pipe (510) is arranged at the top of the neutralization tank (503), a third liquid outlet pipe (511) is arranged at the bottom of the neutralization tank (503), an exhaust pipe (512) is arranged at the top of the right side wall of the neutralization tank (503).
9. The control device for producing acid from sulfur-containing wastewater according to claim 8, wherein: the absorbents of the inner cavities of the first absorption tank (501) and the second absorption tank (502) adopt concentrated sulfuric acid solution with the mass fraction of 98%, and the neutralizer of the inner cavity of the neutralization tank (503) adopts limestone solution.
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