CN112642281A - Cooling washing dust removal system and method for hydrogen sulfide acid production - Google Patents
Cooling washing dust removal system and method for hydrogen sulfide acid production Download PDFInfo
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- CN112642281A CN112642281A CN202011581521.2A CN202011581521A CN112642281A CN 112642281 A CN112642281 A CN 112642281A CN 202011581521 A CN202011581521 A CN 202011581521A CN 112642281 A CN112642281 A CN 112642281A
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- washing
- spraying
- pipe
- cooling
- flue gas
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- 238000005406 washing Methods 0.000 title claims abstract description 102
- 238000001816 cooling Methods 0.000 title claims abstract description 40
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims abstract description 28
- 239000002253 acid Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000000428 dust Substances 0.000 title claims description 5
- 238000005507 spraying Methods 0.000 claims abstract description 78
- 239000003546 flue gas Substances 0.000 claims abstract description 41
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000000779 smoke Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 24
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 239000007921 spray Substances 0.000 description 15
- 239000011148 porous material Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000007832 Na2SO4 Substances 0.000 description 4
- 229920000297 Rayon Polymers 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- HFCSXCKLARAMIQ-UHFFFAOYSA-L disodium;sulfate;hydrate Chemical compound O.[Na+].[Na+].[O-]S([O-])(=O)=O HFCSXCKLARAMIQ-UHFFFAOYSA-L 0.000 description 1
- 238000007380 fibre production Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
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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
- B01D53/50—Sulfur oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C3/00—Other direct-contact heat-exchange apparatus
- F28C3/06—Other direct-contact heat-exchange apparatus the heat-exchange media being a liquid and a gas or vapour
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a cooling, washing and dedusting system and method for preparing acid from hydrogen sulfide, which comprises a washing barrel, a circulating tank, a plate heat exchanger and a spraying three-way pipe; three end parts of the spraying three-way pipe are respectively connected with the flue gas inlet pipe, the spraying medium inlet pipe and the flue gas inlet on the washing barrel; the washing barrel is provided with an overflow pipe, the overflow pipe is communicated with the circulating groove through a pipeline, the smoke inlet is arranged below the overflow pipe, so that a liquid seal is formed inside the washing barrel, the top of the washing barrel is provided with a smoke outlet, and negative pressure is formed at the smoke outlet; the circulating tank is connected with an inlet of the plate heat exchanger through a pipeline, an outlet of the plate heat exchanger is connected with a spraying medium inlet pipe through a pipeline, and a circulating pump is arranged on the pipeline between the circulating tank and the plate heat exchanger. The invention solves the problem of poor cooling and washing effects of the existing flue gas cooling and washing process.
Description
Technical Field
The invention relates to the technical field of viscose fiber production, in particular to a cooling, washing and dedusting system and method for hydrogen sulfide acid production.
Background
During the production of viscose fiber, great amount of hydrogen sulfide gas is produced in the acid bath system, vacuum degassing process is adopted to eliminate hydrogen sulfide gas from the acid bath, low concentration hydrogen sulfide gas dispersed in the spinning machine head is produced into sodium sulfide or sodium hydrosulfide through spraying alkali washing process and then reacted with dilute sulfuric acid to enrich and produce high concentration hydrogen sulfide, and the hydrogen sulfide gas produced in the two processes has Na in the acid bath2SO4In the degassing process, the hydrogen sulfide gas is sent to a hydrogen sulfide acid making system to be combusted to form ash, and after the hydrogen sulfide is combusted in a combustion furnace, primary heat exchange is carried out through a boiler to generate a product containing S02Water vapor, Na2SO4Small amount of S03The high-temperature mixed gas of (4) except S02And S03Besides the subsequent acid making process, the method can be used for processing the other substances and the high-temperature two elements, so that the influence on the subsequent process of the acid making system is avoided.
According to water vapor and Na2SO4Physical and chemical properties, the adoption of the water washing process can reduce the temperature of the mixed flue gas, condense water vapor and dissolve Na2SO4This requirement can be achieved by designing a composite spray washing device.
The traditional flue gas cooling and washing process adopts a single in-tank spraying technology, utilizes a circulating pump to pressurize, spray and wash, and cannot meet the requirement that the produced viscose fiber contains a large amount of Na due to technical limitation and poor cooling and washing effects2SO4The hydrogen sulfide gas is required to be washed after being combusted.
Disclosure of Invention
The invention aims to provide a cooling, washing and dedusting system for hydrogen sulfide acid production, which solves the problem of poor cooling and washing effects of the existing flue gas cooling and washing process.
The invention is realized by the following technical scheme:
a cooling, washing and dedusting system for hydrogen sulfide acid production comprises a washing barrel, a circulating tank, a plate heat exchanger and a spraying three-way pipe;
three end parts of the spraying three-way pipe are respectively connected with the flue gas inlet pipe, the spraying medium inlet pipe and the flue gas inlet on the washing barrel;
the washing barrel is provided with an overflow pipe, the overflow pipe is communicated with the circulating groove through a pipeline, the smoke inlet is arranged below the overflow pipe, so that liquid seal is formed inside the washing barrel, the top of the washing barrel is provided with a smoke outlet, negative pressure is formed at the smoke outlet, and mixed smoke can be washed normally through the liquid seal;
the circulating tank is connected with an inlet of the plate heat exchanger through a pipeline, an outlet of the plate heat exchanger is connected with a spraying medium inlet pipe through a pipeline, and a circulating pump is arranged on the pipeline between the circulating tank and the plate heat exchanger.
The working principle of the invention is as follows:
will contain S02Water vapor, Na2SO4Small amount of S03The high-temperature mixed gas adopts the malleation mode to deliver to neotype three-way pipe lower part that sprays, and the flue gas after spraying the three-way pipe gets into the washing bucket through the flue gas import, through the liquid seal washing mode in the washing bucket, will mix the flue gas and further cool down the washing, and spray medium passes through the overflow pipe and gets into the circulation inslot, through circulating pump circulation use, and the circulating pump carries the spray medium in the circulation inslot to plate heat exchanger and carries out the heat transfer, and the medium after the heat transfer is delivered to and is sprayed the medium admission pipe and spray and force the cooling, tentatively reduces the flue gas temperature.
The spraying three-way pipe is used for spraying and cooling the high-temperature mixed gas for the first time, and the spraying three-way pipe is small in inner space and small in spraying and cooling, so that the problem that the washing effect is influenced by high temperature in the washing barrel due to the fact that the high-temperature mixed gas directly enters the washing barrel can be effectively avoided, particularly the temperature in the washing barrel is not uniformly distributed, and the temperature at the smoke inlet of the washing barrel is far higher than that in other areas.
According to the invention, the spraying three-way pipe and the washing barrel are arranged, the high-temperature mixed gas enters the spraying three-way pipe, is primarily cooled through the spraying medium, then enters the washing barrel, and is further cooled and washed through a liquid seal washing mode in the washing barrel, so that the cooling and washing effects on the high-temperature mixed gas are improved.
In conclusion, the invention adopts the spraying tee joint to carry out pipeline direct spraying and washing technology of the washing barrel liquid seal, can realize the comprehensive washing and cooling of the flue gas, and is more suitable for the hydrogen sulfide gas treatment technology generated by the viscose manufacturing process.
Further, the washing barrel is internally provided with a first pore plate between the smoke inlet and the overflow pipe, and the smoke inlet, the first pore plate and the overflow pipe are arranged from bottom to top.
The first orifice plate disperses the mixed flue gas, thereby being convenient for fully washing and cooling.
Furthermore, a drain pipe is arranged at the lower part of the washing barrel.
Furthermore, a second pore plate is arranged in the spraying medium inlet pipe, and the second pore plate is vertical to the flowing direction of the spraying medium.
The second orifice plate disperses the mixed flue gas, thereby being convenient for fully washing and cooling.
Furthermore, the top port of the spraying three-way pipe is connected with a spraying medium inlet pipe, the lower port of the spraying three-way pipe is connected with a flue gas inlet, and the side port of the spraying three-way pipe is connected with a flue gas inlet pipe.
Preferably, the spraying medium inlet pipe comprises a buffer pipe, one end of the buffer pipe is detachably connected with the top port of the spraying three-way pipe, the other end of the buffer pipe is detachably connected with the spraying medium inlet pipe, a second pore plate is arranged on the lower portion of the inner side of the buffer pipe, and the inner diameter of the spraying medium inlet pipe is smaller than that of the buffer pipe.
According to the invention, the inner diameter of the spray medium leading-in pipe is set to be smaller than that of the buffer pipe, so that the pressure of the spray medium in the spray medium leading-in pipe is larger than that of the buffer pipe, the spray medium is favorably and quickly led in, meanwhile, the buffer pipe is used for buffering, the speed of the spray medium in contact with the flue gas can be reduced, the cooling and washing effects are further improved, the spray medium can be led in at a high speed, the cooling and washing effects can be improved, the arrangement of the second orifice plate can homogenize the spray medium, the uniformity of the contact between the spray medium and the flue gas is improved, and the cooling and washing effects are.
The first orifice plate and the second orifice plate are both plate-shaped structures, and a plurality of round holes are uniformly arranged on the plate-shaped structures.
Furthermore, the flue gas inlet pipe and the flue gas inlet are both connected with the spraying three-way pipe through a bent pipe.
Further, two plate heat exchangers are arranged in parallel.
The plate heat exchanger is convenient to overhaul and replace without shutdown.
Further, the top of the washing barrel is provided with an access hole.
Further, the smoke outlet of the washing tub is communicated with the circulation tank through a duct.
Further, the circulating pump adopts an acid-proof pump.
A washing method of a cooling washing dust removal system for hydrogen sulfide acid production comprises the following steps:
s1, the mixed gas enters a spraying three-way pipe, and is subjected to preliminary cooling through a spraying medium entering from the top of the spraying three-way pipe;
s2, the cooled gas enters a washing barrel, and washing is realized in the liquid seal state of the washing barrel;
s3, discharging the washed gas out of the washing barrel; and the spraying medium enters the circulating tank through the overflow pipe and is circularly used for spraying of the spraying three-way pipe.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the invention, the spraying three-way pipe and the washing barrel are arranged, the high-temperature mixed gas enters the spraying three-way pipe, is primarily cooled through the spraying medium, then enters the washing barrel, and is further cooled and washed through a liquid seal washing mode in the washing barrel, so that the cooling and washing effects on the high-temperature mixed gas are improved.
2. The invention adopts the spraying three-way pipe, can disperse the spraying medium to the maximum extent, realizes better contact with the flue gas, and achieves the purposes of washing and cooling.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a cooling washing dust-removing device;
FIG. 2 is a schematic diagram of a first orifice plate;
FIG. 3 is a schematic structural view of a spray medium inlet pipe;
fig. 4 is a cross-sectional view taken at a-a in fig. 3.
Reference numbers and corresponding part names in the drawings:
1-plate heat exchanger, 2-washing barrel, 3-spraying medium inlet pipe, 4-flue gas inlet pipe, 5-spraying three-way pipe, 6-flue gas inlet, 7-blow-off pipe, 8-overflow pipe, 9-circulation tank, 10-circulation pump, 11-first orifice plate and 12-second orifice plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
as shown in fig. 1-4, a cooling, washing and dedusting system for hydrogen sulfide acid production comprises a washing barrel 2, a circulation tank 9, a plate heat exchanger 1 and a spraying three-way pipe 5;
three tip of spraying three-way pipe 5 is connected with flue gas inlet pipe 4, spraying medium inlet pipe 3 and the flue gas import 6 on the washing barrel 2 respectively, specifically: the top port of the spraying three-way pipe 5 is connected with a spraying medium inlet pipe 3, the lower port of the spraying three-way pipe is connected with a flue gas inlet 6, the side port of the spraying three-way pipe is connected with a flue gas inlet pipe 4, and the flue gas inlet pipe 4 and the flue gas inlet 6 are both connected with the spraying three-way pipe 5 through bent pipes;
an overflow pipe 8 is arranged on the washing barrel 2, the overflow pipe 8 is communicated with a circulating groove 9 through a pipeline, the smoke inlet 6 is arranged below the overflow pipe 8, so that a liquid seal is formed inside the washing barrel 2, a smoke outlet is arranged at the top of the washing barrel 2, negative pressure is formed at the smoke outlet, the negative pressure can be formed through a venturi or through connection of a top air pipe and a fan, and a drain pipe 7 is arranged at the lower part of the washing barrel 2;
the circulating tank 9 is connected with an inlet of the plate heat exchanger 1 through a pipeline, an outlet of the plate heat exchanger 1 is connected with the spraying medium inlet pipe 3 through a pipeline, a circulating pump 10 is arranged on the pipeline between the circulating tank 9 and the plate heat exchanger 1, and the circulating pump 10 adopts an acid-resistant pump.
The washing method of the present embodiment includes the steps of:
s1, the mixed gas enters the spraying three-way pipe 5, and is subjected to preliminary cooling through a spraying medium entering from the top of the spraying three-way pipe 5;
s2, the cooled gas enters the washing barrel 2, and washing is realized in the liquid seal state of the washing barrel 2;
s3, discharging the washed gas out of the washing barrel 2; the spraying medium enters the circulating groove 9 through the overflow pipe 8 and is circularly used for spraying of the spraying three-way pipe 5.
Example 2:
as shown in fig. 1 to 4, in the present embodiment, based on embodiment 1, a first orifice plate 11 is disposed between the flue gas inlet 6 and the overflow pipe 8 in the washing tub 2, and the flue gas inlet 6, the first orifice plate 11 and the overflow pipe 8 are disposed from bottom to top; and a second orifice plate 12 is arranged in the spraying medium inlet pipe 3, and the second orifice plate 12 is vertical to the flowing direction of the spraying medium.
Example 3:
as shown in fig. 1 to 4, the present embodiment is based on embodiment 1, and two plate heat exchangers 1 are arranged in parallel.
Example 4:
as shown in fig. 1 to 4, the present embodiment is based on embodiment 1, and the top of the washing tub 2 is provided with an access opening; the smoke outlet of the washing barrel 2 is communicated with the circulating groove 9 through a pipeline.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A cooling, washing and dedusting system for hydrogen sulfide acid making is characterized by comprising a washing barrel (2), a circulating tank (9), a plate type heat exchanger (1) and a spraying three-way pipe (5);
three end parts of the spraying three-way pipe (5) are respectively connected with the flue gas inlet pipe (4), the spraying medium inlet pipe (3) and a flue gas inlet (6) on the washing barrel (2);
an overflow pipe (8) is arranged on the washing barrel (2), the overflow pipe (8) is communicated with a circulating groove (9) through a pipeline, the flue gas inlet (6) is arranged below the overflow pipe (8), a smoke outlet is arranged at the top of the washing barrel (2), and negative pressure is formed at the smoke outlet;
the circulating tank (9) is connected with an inlet of the plate heat exchanger (1) through a pipeline, an outlet of the plate heat exchanger (1) is connected with the spraying medium inlet pipe (3) through a pipeline, and a circulating pump (10) is arranged on the pipeline between the circulating tank (9) and the plate heat exchanger (1).
2. The cooling, washing and dedusting system for hydrogen sulfide to produce acid according to claim 1, wherein a first orifice plate (11) is arranged between the flue gas inlet (6) and the overflow pipe (8) in the washing barrel (2), and the flue gas inlet (6), the first orifice plate (11) and the overflow pipe (8) are arranged from bottom to top.
3. The cooling washing and dedusting system for the hydrogen sulfide to produce acid according to claim 1, characterized in that a drain pipe (7) is arranged at the lower part of the washing barrel (2).
4. The cooling, washing and dedusting system for hydrogen sulfide to produce acid according to claim 1, wherein a second orifice plate (12) is arranged in the spraying medium inlet pipe (3), and the second orifice plate (12) is perpendicular to the flowing direction of the spraying medium.
5. The cooling, washing and dedusting system for hydrogen sulfide to produce acid according to claim 1, wherein a top port of the spraying three-way pipe (5) is connected with the spraying medium inlet pipe (3), a lower port of the spraying three-way pipe is connected with the flue gas inlet (6), and a side port of the spraying three-way pipe is connected with the flue gas inlet pipe (4).
6. The cooling, washing and dedusting system for hydrogen sulfide to produce acid according to claim 5, wherein the flue gas inlet pipe (4) and the flue gas inlet (6) are connected with the three-way spraying pipe (5) through bent pipes.
7. The cooling, washing and dedusting system for hydrogen sulfide to produce acid according to claim 1, wherein two plate heat exchangers (1) are arranged in parallel; the circulating pump (10) adopts an acid-proof pump.
8. A cooling, washing and dust removal system for hydrogen sulfide to produce acid according to claim 1, characterized in that the top of the washing barrel (2) is provided with an access hole.
9. A cooling, washing and dedusting system for hydrogen sulfide to produce acid according to claim 1, wherein the smoke outlet of the washing barrel (2) is communicated with the circulating tank (9) through a pipeline.
10. The washing method of the cooling washing dust removal system for hydrogen sulfide acid production based on any one of claims 1 to 9 is characterized by comprising the following steps:
s1, the mixed gas enters the spraying three-way pipe (5), and is subjected to preliminary cooling through a spraying medium entering from the top of the spraying three-way pipe (5);
s2, the cooled gas enters the washing barrel (2) and is washed in a liquid seal state of the washing barrel (2);
s3, discharging the washed gas out of the washing barrel (2); the spraying medium enters the circulating groove (9) through the overflow pipe (8) and is circularly used for spraying of the spraying three-way pipe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011581521.2A CN112642281A (en) | 2020-12-28 | 2020-12-28 | Cooling washing dust removal system and method for hydrogen sulfide acid production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011581521.2A CN112642281A (en) | 2020-12-28 | 2020-12-28 | Cooling washing dust removal system and method for hydrogen sulfide acid production |
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| CN112642281A true CN112642281A (en) | 2021-04-13 |
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| CN202011581521.2A Pending CN112642281A (en) | 2020-12-28 | 2020-12-28 | Cooling washing dust removal system and method for hydrogen sulfide acid production |
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Application publication date: 20210413 |