CN111646436A - System for maintaining acid water balance in low-concentration sulfur dioxide acid making - Google Patents
System for maintaining acid water balance in low-concentration sulfur dioxide acid making Download PDFInfo
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- CN111646436A CN111646436A CN202010619313.0A CN202010619313A CN111646436A CN 111646436 A CN111646436 A CN 111646436A CN 202010619313 A CN202010619313 A CN 202010619313A CN 111646436 A CN111646436 A CN 111646436A
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- tower
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- 239000002253 acid Substances 0.000 title claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims abstract description 28
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000003546 flue gas Substances 0.000 claims abstract description 37
- 239000002349 well water Substances 0.000 claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 235000020681 well water Nutrition 0.000 claims abstract description 22
- 239000000945 filler Substances 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000010521 absorption reaction Methods 0.000 claims abstract description 7
- 238000003723 Smelting Methods 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 239000000779 smoke Substances 0.000 claims 3
- 239000000126 substance Substances 0.000 abstract description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical group [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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
-
- 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
- B01D53/14—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 by absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
-
- 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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- 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
- B01D53/26—Drying gases or vapours
-
- 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
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to the technical field of acid making chemical industry, in particular to a system for maintaining the balance of low-concentration sulfur dioxide acid making water, which is characterized in that a high-efficiency washer, a filler cooling tower, a flue gas re-cooling tower, an electric demisting tower, a drying tower, a converter and an absorption tower are sequentially arranged along the flow direction of smelting flue gas, the filler cooling tower is connected with a dilute acid plate heat exchanger communicated with circulating water, the flue gas re-cooling tower is communicated with a second dilute acid plate heat exchanger, and the second dilute acid plate heat exchanger is respectively communicated with a deep well water feed well and a deep well water return well, so that the cooled deep well water resource is recharged, the flue gas is cooled, and the water resource is recycled.
Description
Technical Field
The invention relates to the technical field of technical acid production chemical industry, in particular to a system for maintaining the balance of low-concentration sulfur dioxide acid production water.
Background
SO2 is one of the major sources of atmospheric pollution, mainly from fossil energy (mainly coal) combustion and sulfur-bearing mineral processing. The sulfur and sulfuric acid industry is generally divided according to SO2 concentration, flue gas with phi (SO2) being more than or equal to 12.0% is called high-concentration SO2 flue gas, flue gas with phi (SO2) being less than 5.0% is low-concentration SO2 flue gas, and flue gas with phi (SO2) being 5.0% -12.0% belongs to the middle-concentration SO2 flue gas. Because the high-concentration SO2 flue gas with the phi (SO2) of not less than 12.0 percent cannot directly adopt the conventional two-conversion two-absorption acid making process due to the limitation of the heat-resisting temperature of the acid making conversion vanadium catalyst (not more than 630 ℃), but a high-concentration SO2 conversion acid making technology must be adopted, and similarly, the low-concentration SO2 flue gas with the phi (SO2) of less than 5.0 percent cannot directly adopt the conventional contact acid making process due to the limitation of the system self-heating balance and the water balance.
The low concentration SO2 has the following characteristics: 1. the flue gas volume is large, the SO2 concentration is low and large fluctuation exists. 2. The flue gas temperature is generally higher, and the water content of the flue gas is generally higher. 3. The content of harmful impurities in the flue gas is high. The main problem of the low-concentration SO2 flue gas acid making is system water balance, and because the concentration of the raw material gas SO2 is low, the amount of water brought by the flue gas must be reduced when the acid making system produces high-concentration product acid, and the temperature of the purified outlet flue gas must be reduced according to the concentration requirement of the acid making and the concentration of the low-concentration SO 2.
In the prior art, the cooling is carried out by adopting a lithium bromide unit or a screw refrigerating unit and a diluted acid plate, the method has the defects of large investment and high energy consumption, and a refrigerating system for maintaining continuous operation in an acid plant cannot bear economically.
Disclosure of Invention
The invention aims to provide a system for maintaining the balance of low-concentration sulfur dioxide acid making water, which reduces the temperature of flue gas through deep well water, recharges the deep well water for recycling, saves investment and operation cost, greatly reduces the enterprise cost and reduces the waste of water resources.
The technical scheme adopted by the invention for solving the technical problems is as follows: a system for keeping low concentration sulfur dioxide system acid water balance, it has set gradually high-efficient scrubber, filler cooling tower, flue gas recooling tower, electric defogging, drying tower, converter and absorption tower along smelting the flue gas flow direction, filler cooling tower and first diluted acid plate heat exchanger intercommunication, second diluted acid plate heat exchanger intercommunication and circulating water pipeline intercommunication, flue gas recooling tower and second diluted acid plate heat exchanger intercommunication, second diluted acid plate heat exchanger communicates with deep-well water feed well and deep-well water return well respectively.
Preferably, the second dilute acid plate heat exchanger is communicated with the deep well water feed well through a deep water suction pump and a deep water inlet pipeline, and the second dilute acid plate heat exchanger is communicated with the deep well water return well through a deep water return pump and a return pipeline.
Preferably, the electric defogging comprises a primary electric defogging and a secondary electric defogging.
Preferably, a blower is arranged between the drying tower and the conversion tower.
Preferably, the flue gas recooling tower is provided with a temperature detection device and an SO2 concentration detection device, and the deep water inlet pipeline is provided with a flow regulation device.
The invention has the beneficial effects that: a system for maintaining the balance of acid water produced by low-concentration sulfur dioxide is characterized in that a high-efficiency washer, a filler cooling tower, a flue gas re-cooling tower, an electric demisting tower, a drying tower, a converter and an absorption tower are sequentially arranged along the flowing direction of smelting flue gas, the filler cooling tower is connected with a dilute acid plate heat exchanger communicated with circulating water, the flue gas re-cooling tower is communicated with a second dilute acid plate heat exchanger, and the second dilute acid plate heat exchanger is respectively communicated with a deep well water feeding well and a deep well water returning well, so that the water resource re-filling of the deep well after cooling is realized, the flue gas is cooled, and the water resource is recycled.
Drawings
FIG. 1 is a schematic view of the flow structure of the present invention.
The device comprises a high-efficiency scrubber 1, a filler cooling tower 2, a first dilute acid plate heat exchanger 3, a flue gas re-cooling tower 4, a second dilute acid plate heat exchanger 5, a deep water feed well 6, a deep well water suction pump 7, a deep well water return well 8, a deep well water return pump 9, a first-stage electric demisting device 10, a second-stage electric demisting device 11, a drying tower 12, a blower 13, a converter 14, an absorption tower 15 and an acid storage tank 16.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific examples, which are not intended to limit the scope of the invention.
As shown in fig. 1, in the system for maintaining the balance of acid production from low-concentration sulfur dioxide of this embodiment, taking the smelting SO2 concentration of 2-5% and producing (H2SO4) 98% of sulfuric acid product as an example, a high-efficiency scrubber 1, a filler cooling tower 2, a flue gas re-cooling tower 4, a first-stage electric demisting tower 10, a second-stage electric demisting tower 11, a drying tower 12, an air blower 13, a converter 14, an absorption tower 15 and an acid storage tank 16 are sequentially arranged along the flow direction of flue gas, the filler cooling tower 2 is communicated with a first dilute acid plate heat exchanger 3, the first dilute acid plate heat exchanger 3 is communicated with circulating water to perform first heat exchange on the flue gas, the temperature of the flue gas can be reduced to about 38 ℃, the flue gas re-cooling tower 4 is communicated with a second acid through a dilute acid plate heat exchanger 5, the second acid is communicated with a deep well water supply well 6 through the dilute acid plate heat exchanger 5, the heat exchange, therefore, the moisture brought into the drying tower is greatly reduced, the requirement of maintaining the acid making water balance is met, the second dilute acid plate type heat exchanger 5 is communicated with the deep well water feed well 6 through the deep water suction pump 7 and the deep water inlet pipeline, the second dilute acid plate type heat exchanger 5 is communicated with the deep well water return well 8 through the deep water return pump 8 and the water return pipeline, the cooled deep well water is recharged to the deep well water return well to realize the repeated cyclic utilization, the waste of water resources is reduced, and the enterprise cost is saved; furthermore, a SO2 concentration detection device and a flue gas temperature detection device are arranged in the flue gas recooling tower 4, the flow of deep well water is adjusted according to the concentration of SO2 and the concentration of sulfuric acid products produced during acid making, and the requirement of accurate acid making is met.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (5)
1. A system for maintaining low concentration sulfur dioxide system acid water balance, its characterized in that: the smelting device is characterized in that a high-efficiency washer, a filler cooling tower, a smoke re-cooling tower, an electric demisting tower, a drying tower, a converter and an absorption tower are sequentially arranged along the flowing direction of smelting smoke, the filler cooling tower is communicated with a first dilute acid plate heat exchanger, a second dilute acid plate heat exchanger is communicated with a circulating water pipeline, the smoke re-cooling tower is communicated with a second dilute acid plate heat exchanger, and the second dilute acid plate heat exchanger is respectively communicated with a deep well water feed well and a deep well water return well.
2. The system for maintaining a low concentration sulfur dioxide acid making water balance of claim 1, wherein: the second dilute acid plate type heat exchanger is communicated with the deep well water feed well through a deep water suction pump and a deep water inlet pipeline, and the second dilute acid plate type heat exchanger is communicated with the deep well water return well through a deep water return pump and a return pipeline.
3. The system for maintaining a low concentration sulfur dioxide acid making water balance of claim 2, wherein: the electric defogging comprises a first-stage electric defogging and a second-stage electric defogging.
4. The system for maintaining a low concentration sulfur dioxide acid making water balance of claim 1, wherein: and an air blower is arranged between the drying tower and the conversion tower.
5. The system for maintaining a low concentration sulfur dioxide acid making water balance of claim 2, wherein: the flue gas is cooled the tower again and is provided with temperature-detecting device and SO2 concentration detection device, deep water inlet line is provided with flow control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010619313.0A CN111646436A (en) | 2020-06-30 | 2020-06-30 | System for maintaining acid water balance in low-concentration sulfur dioxide acid making |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010619313.0A CN111646436A (en) | 2020-06-30 | 2020-06-30 | System for maintaining acid water balance in low-concentration sulfur dioxide acid making |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111646436A true CN111646436A (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010619313.0A Pending CN111646436A (en) | 2020-06-30 | 2020-06-30 | System for maintaining acid water balance in low-concentration sulfur dioxide acid making |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101468794A (en) * | 2007-12-25 | 2009-07-01 | 南化集团研究院 | Method for sustaining low concentration sulfuric dioxide acid making water balance in high altitude area |
| CN103303877A (en) * | 2013-07-03 | 2013-09-18 | 中国瑞林工程技术有限公司 | Comprehensive multi-gas source low-concentration SO2 fume recycling acid-making technological process |
| CN103848403A (en) * | 2013-04-11 | 2014-06-11 | 襄阳泽东化工集团有限公司 | Medium-low-grade heat energy recycling system and method in acid production by using iron pyrite |
| CN107673314A (en) * | 2017-11-02 | 2018-02-09 | 湖北陆盛环保工程有限公司 | A kind of low concentration SO2One turn of two suction sulfuric acid preparation method of flue gas |
| CN109675394A (en) * | 2019-01-23 | 2019-04-26 | 湖北陆盛环保工程有限公司 | A kind of low concentration SO2The pure method of one turn of one suction complete analysis of flue gas during smelting |
-
2020
- 2020-06-30 CN CN202010619313.0A patent/CN111646436A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101468794A (en) * | 2007-12-25 | 2009-07-01 | 南化集团研究院 | Method for sustaining low concentration sulfuric dioxide acid making water balance in high altitude area |
| CN103848403A (en) * | 2013-04-11 | 2014-06-11 | 襄阳泽东化工集团有限公司 | Medium-low-grade heat energy recycling system and method in acid production by using iron pyrite |
| CN103303877A (en) * | 2013-07-03 | 2013-09-18 | 中国瑞林工程技术有限公司 | Comprehensive multi-gas source low-concentration SO2 fume recycling acid-making technological process |
| CN107673314A (en) * | 2017-11-02 | 2018-02-09 | 湖北陆盛环保工程有限公司 | A kind of low concentration SO2One turn of two suction sulfuric acid preparation method of flue gas |
| CN109675394A (en) * | 2019-01-23 | 2019-04-26 | 湖北陆盛环保工程有限公司 | A kind of low concentration SO2The pure method of one turn of one suction complete analysis of flue gas during smelting |
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Application publication date: 20200911 |