CN204093234U - A kind of sulfuric acid flue gas cleaning process unit - Google Patents
A kind of sulfuric acid flue gas cleaning process unit Download PDFInfo
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- CN204093234U CN204093234U CN201420624552.5U CN201420624552U CN204093234U CN 204093234 U CN204093234 U CN 204093234U CN 201420624552 U CN201420624552 U CN 201420624552U CN 204093234 U CN204093234 U CN 204093234U
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Abstract
The utility model discloses a kind of sulfuric acid flue gas cleaning process unit, primarily of sulfur dioxide stripping tower, diluted acid filter, scrubbing tower, diluted acid settling tank, dilute acid bath, thin acid pump, conical setting tank, circulation acid tank, scrubbing tower circulating pump, sour dredge pump, cooling tower, cooling tower circulating pump, acid cooler, one-level electrostatic precipitator, secondary electrostatic precipitator forms; Capital equipment is that furnace gas Trunk Line is connected by pipeline, utilizes system negative pressure to be recovered in production system by the sulphur dioxide gas parsed in diluted acid; Liquid, diluted acid connect each corresponding tower by each corresponding pump pipeline, groove completes washing work to furnace gas; This technique is simple, easy to operate, effectively can reduce pipeline and equipment blocking, decrease cleaning up cost and down time simultaneously; The dilute sulfuric acid impurity content produced is few, concentration is higher, can fully utilize; Industrial water amount can be reduced, have good economic benefits and environmental benefit.
Description
Technical field
Involved by the utility model is sulfuric acid industry technical field, relates in particular to the flue gas cleaning process unit in pyrite-based sulfuric acid production production process.
Background technology
In pyrite-based sulfuric acid production technique, producing SO
2in the process of furnace gas, many fine solid particles and impurity is had to enter SO
2furnace gas, then directly enter follow-up system and produce sulfuric acid, they not only to blocking and the corrosion causing equipment, also can affect product quality.Therefore, must in advance to SO
2furnace gas carries out purification and impurity removal, then enters subsequent handling and produces standard compliant sulfuric acid.
Existing pyrite-based sulphuric acid plant, mostly uses the technological process that tower-groove integration or tower-groove are separated, and adopts dilute sulfuric acid circulation cleaning to purify furnace gas.These two kinds of technological processes are in flue gas cleaning process, dust a large amount of in furnace gas and impurity enter in dilute sulfuric acid by dilute sulfuric acid washing, purifying, therefore, through the circulation of dilute sulfuric acid in the long period, wherein solid content is increased, and be deposited in tower, groove, pipeline and equipment, result in blockage, and waste time and energy during cleaning, also there is security risk simultaneously, and cause the dilute sulfuric acid solid content of discharge higher, be difficult to utilize, be often used as wastewater treatment.As carried out washing, purifying with water, can consume a large amount of waste water, production cost can increase greatly, and produces a large amount of dilute sulfuric acids and be difficult to disposal and utilization, also increases environmental protection risk simultaneously.
Summary of the invention
The utility model object first enters scrubbing tower for furnace gas to carry out acid-scrubbing cleaning, a large amount of dust impurities is gone the solid impurity in dilute sulfuric acid mainly just to concentrate on this link by eccysis, consider the solid impurity content as far as possible reduced in this link in dilute sulfuric acid, and be used after filtration treatment is carried out to the dilute sulfuric acid of discharging, reduce environmental protection risk.
For this reason, the utility model carries out according to the following steps:
The utility model device primarily of sulfur dioxide stripping tower 1, diluted acid filter 2, scrubbing tower 3, diluted acid settling tank 4, dilute acid bath 5, thin acid pump 6, conical setting tank 7, circulation acid tank 8, scrubbing tower circulating pump 9, acid dredge pump 10, cooling tower 11, cooling tower circulating pump 12, acid cooler 13, one-level electrostatic precipitator 14, secondary electrostatic precipitator 15 forms; Sulfur dioxide stripping tower 1, dilute acid bath 5, diluted acid filter 2, scrubbing tower 3, diluted acid settling tank 4, subsider, circulation acid tank, cooling tower 11, acid cooler 13, one-level electrostatic precipitator 14, secondary electrostatic precipitator 15 is that furnace gas Trunk Line is connected by pipeline, utilizes system negative pressure to be recovered in production system by the sulphur dioxide gas parsed in diluted acid; Liquid, diluted acid by thin acid pump 6, scrubbing tower circulating pump 9, sour dredge pump 10, cooling tower circulating pump 12 pipeline connects each corresponding tower, groove completes washing work to furnace gas;
Scrubbing tower 3 is designed to tower-groove unpack format, taper is designed at the bottom of scrubbing tower, dilute sulfuric acid enters from scrubbing tower top, certainly cone settling tank 7 is flowed into through conical bottom after washing furnace gas, dilute sulfuric acid is in subsider after sedimentation, clear liquid flows into scrubbing tower circulation acid tank 8, use as scrubbing tower recycle acid, the sludge deposited is delivered to sulfate slag stockyard by sour dredge pump 10 and is mixed with dry slag bottom cone settling tank, scrubbing tower recycle acid trench bottom is also designed to taper, the sour mud being convenient to deposit is collected, and is together discharged by sour dredge pump 10;
Furnace gas enters cooling tower cooling and moves heat after washing impurity-removing, cooling tower is designed to tower-groove unitary form, and be conical lower portion, tower bottom is used as the cooling tower circulating slot of cooling tower, conical lower portion collects the sour mud of deposition, then pass through the timing of gravity flow mode discharged to subsider, avoid sour mud to deposit and blocked by pipeline too much, diluted acid unnecessary in cooling tower is discharged to scrubbing tower circulating slot through overfall.
Cooled furnace gas enters one-level electrostatic precipitator 14, and secondary electrostatic precipitator 15 arrives subsequent handling after removing acid mist again, and the diluted acid overflow under electrostatic precipitator removes uses to cool cycles;
The dilute sulfuric acid that scrubbing tower circulating pump is got separates part according to the condition of production and enters metre filter, clear liquid enters diluted acid settling tank after the sulfur dioxide that sulfur dioxide stripping tower deviates to dissolve, then flow automatically to dilute acid bath and send into other local uses by thin acid pump 6, filter residue drains into subsider by automatic valve timing.
Effect of the present invention and advantage
1, this technique is simple, easy to operate, effectively can reduce pipeline and equipment blocking, decrease cleaning up cost and down time simultaneously.
2, the dilute sulfuric acid impurity content produced is few, concentration is higher, can fully utilize.
3, industrial water amount can be reduced, have good economic benefits and environmental benefit.
Accompanying drawing explanation
Fig. 1. apparatus structure schematic diagram of the present utility model.
In FIG, 1. sulfur dioxide stripping tower, 2. diluted acid filter, 3. scrubbing tower, 4. diluted acid settling tank, 5. dilute acid bath, 6. thin acid pump, 7. conical setting tank, 8. circulation acid tank, 9. scrubbing tower circulating pump, 10. sour dredge pump, 11. cooling towers, 12. cooling tower circulating pumps, 13. acid coolers, 14. one-level electrostatic precipitators, 15. secondary electrostatic precipitators.
detailed description of the invention
embodiment 1
This law is used for certain company 400,000 tons/year of pyrite-based sulphuric acid plants.Former technique: cleaning 4 ~ 5 times of need stopping every year, each cleaning needs to spend 2 ~ 3 day time, and each cleaning up cost about 5000 yuan, mass percent about 12% dilute sulfuric acid of generation per hour is about 8t/h, all when waste water processes.After adopting this law: built a set of flue gas cleaning process unit according to this law, by sulfur dioxide stripping tower 1, diluted acid filter 2, scrubbing tower 3, diluted acid settling tank 4, dilute acid bath 5, thin acid pump 6, conical setting tank 7, circulation acid tank 8, scrubbing tower circulating pump 9, sour dredge pump 10, cooling tower 11, cooling tower circulating pump 12, acid cooler 13, one-level electrostatic precipitator 14, secondary electrostatic precipitator 15 forms; Sulfur dioxide stripping tower 1, dilute acid bath 5, diluted acid filter 2, scrubbing tower 3, diluted acid settling tank 4, subsider, circulation acid tank, cooling tower 11, acid cooler 13, one-level electrostatic precipitator 14, secondary electrostatic precipitator 15 is that furnace gas Trunk Line is connected by pipeline, utilizes system negative pressure to be recovered in production system by the sulphur dioxide gas parsed in diluted acid; Liquid, diluted acid by thin acid pump 6, scrubbing tower circulating pump 9, sour dredge pump 10, cooling tower circulating pump 12 pipeline connects each corresponding tower, groove completes washing work to furnace gas;
Scrubbing tower 3 is designed to tower-groove unpack format, taper is designed at the bottom of scrubbing tower, dilute sulfuric acid enters from scrubbing tower top, certainly cone settling tank 7 is flowed into through conical bottom after washing furnace gas, dilute sulfuric acid is in subsider after sedimentation, clear liquid flows into scrubbing tower circulation acid tank 8, use as scrubbing tower recycle acid, the sludge deposited is delivered to sulfate slag stockyard by sour dredge pump 10 and is mixed with dry slag bottom cone settling tank, scrubbing tower recycle acid trench bottom is also designed to taper, the sour mud being convenient to deposit is collected, and is together discharged by sour dredge pump 10;
Furnace gas enters cooling tower cooling and moves heat after washing impurity-removing, cooling tower is designed to tower-groove unitary form, and be conical lower portion, tower bottom is used as the cooling tower circulating slot of cooling tower, conical lower portion collects the sour mud of deposition, then pass through the timing of gravity flow mode discharged to subsider, avoid sour mud to deposit and blocked by pipeline too much, diluted acid unnecessary in cooling tower is discharged to scrubbing tower circulating slot through overfall.
Cooled furnace gas enters one-level electrostatic precipitator 14, and secondary electrostatic precipitator 15 arrives subsequent handling after removing acid mist again, and the diluted acid overflow under electrostatic precipitator removes uses to cool cycles;
The dilute sulfuric acid that scrubbing tower circulating pump is got separates part according to the condition of production and enters metre filter, clear liquid enters diluted acid settling tank after the sulfur dioxide that sulfur dioxide stripping tower deviates to dissolve, then flow automatically to dilute acid bath and send into other local uses by thin acid pump 6, filter residue drains into subsider by automatic valve timing.
Run by 3 years, annual parking cleaning reduces to 1 ~ 2 time, and each cleaning only needs 1 day, and each cleaning up cost reduces to about 2000 yuan, and about 25% dilute sulfuric acid of generation per hour is about 4t/h, is all utilized.By the enforcement of this law, achieve good economic benefits and environmental benefit.
Claims (1)
1. a sulfuric acid flue gas cleaning process unit, is characterized in that by sulfur dioxide stripping tower (1), diluted acid filter (2), scrubbing tower (3), diluted acid settling tank (4), dilute acid bath (5), thin acid pump (6), conical setting tank (7), circulation acid tank (8), scrubbing tower circulating pump (9), sour dredge pump (10), cooling tower (11), cooling tower circulating pump (12), acid cooler (13), one-level electrostatic precipitator (14), secondary electrostatic precipitator (15) forms; Sulfur dioxide stripping tower (1), dilute acid bath (5), diluted acid filter (2), scrubbing tower (3), diluted acid settling tank (4), conical setting tank (7), circulation acid tank (8), cooling tower (11), acid cooler (13), one-level electrostatic precipitator (14), secondary electrostatic precipitator (15) is that furnace gas Trunk Line is connected by pipeline, utilizes system negative pressure to be recovered in production system by the sulphur dioxide gas parsed in diluted acid; Liquid, diluted acid are by thin acid pump (6), and scrubbing tower circulating pump (9), sour dredge pump (10), cooling tower circulating pump (12) pipeline connects each corresponding tower, groove completes washing work to furnace gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420624552.5U CN204093234U (en) | 2014-10-27 | 2014-10-27 | A kind of sulfuric acid flue gas cleaning process unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420624552.5U CN204093234U (en) | 2014-10-27 | 2014-10-27 | A kind of sulfuric acid flue gas cleaning process unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204093234U true CN204093234U (en) | 2015-01-14 |
Family
ID=52261705
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420624552.5U Withdrawn - After Issue CN204093234U (en) | 2014-10-27 | 2014-10-27 | A kind of sulfuric acid flue gas cleaning process unit |
Country Status (1)
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|---|---|
| CN (1) | CN204093234U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353306A (en) * | 2014-10-27 | 2015-02-18 | 瓮福（集团）有限责任公司 | Sulfuric acid furnace gas purification process device |
| CN112723321A (en) * | 2021-01-26 | 2021-04-30 | 呼伦贝尔驰宏矿业有限公司 | Acid cross-linking system and acid cross-linking process for industrial sulfuric acid preparation purification section |
-
2014
- 2014-10-27 CN CN201420624552.5U patent/CN204093234U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353306A (en) * | 2014-10-27 | 2015-02-18 | 瓮福（集团）有限责任公司 | Sulfuric acid furnace gas purification process device |
| CN104353306B (en) * | 2014-10-27 | 2016-05-04 | 瓮福（集团）有限责任公司 | A kind of sulfuric acid flue gas cleaning process unit |
| CN112723321A (en) * | 2021-01-26 | 2021-04-30 | 呼伦贝尔驰宏矿业有限公司 | Acid cross-linking system and acid cross-linking process for industrial sulfuric acid preparation purification section |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150114 Effective date of abandoning: 20160504 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |