CN115259104A - Sulfuric acid production system and method for controlling acid concentration of blowing device - Google Patents
Sulfuric acid production system and method for controlling acid concentration of blowing device Download PDFInfo
- Publication number
- CN115259104A CN115259104A CN202210802721.9A CN202210802721A CN115259104A CN 115259104 A CN115259104 A CN 115259104A CN 202210802721 A CN202210802721 A CN 202210802721A CN 115259104 A CN115259104 A CN 115259104A
- Authority
- CN
- China
- Prior art keywords
- sulfuric acid
- production system
- acid production
- air
- oleum
- Prior art date
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 193
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000002253 acid Substances 0.000 title claims abstract description 21
- 238000007664 blowing Methods 0.000 title claims description 4
- HIFJUMGIHIZEPX-UHFFFAOYSA-N sulfuric acid;sulfur trioxide Chemical compound O=S(=O)=O.OS(O)(=O)=O HIFJUMGIHIZEPX-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000001035 drying Methods 0.000 claims abstract description 31
- 238000010926 purge Methods 0.000 claims abstract description 16
- 238000010521 absorption reaction Methods 0.000 claims abstract description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 14
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 claims description 14
- 238000003860 storage Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000002274 desiccant Substances 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a sulfuric acid production system and a method for controlling the acid concentration of a purging device, comprising the purging device; wherein, the purging device comprises a moisture removing device; wherein the moisture removing device includes a drying tower configured as an air container; a sulfuric acid introduction line; an underground fuming sulfuric acid tank; the fuming sulfuric acid production device is communicated with the fuming sulfuric acid underground tank through a process pipeline; according to the invention, the fuming sulfuric acid production device is directly integrated into the sulfuric acid production system, the fuming sulfuric acid produced by the fuming sulfuric acid production device is used as a drying agent of air in the sulfuric acid production system, the fuming sulfuric acid after moisture absorption can be used as a 98% sulfuric acid finished product, and the sulfuric acid with the concentration lower than 98% generated in the process when the sulfuric acid production system stops producing and the fuming sulfuric acid production device does not produce or just produces the fuming sulfuric acid can be used as a production raw material of the fuming sulfuric acid production device.
Description
Technical Field
The invention relates to a sulfuric acid production system and a method for controlling the concentration of acid discharged from a purging device, belonging to the technical field of sulfuric acid production.
Background
After the sulfuric acid production system stops producing sulfuric acid, a large amount of air is needed to replace sulfur dioxide and sulfur trioxide in the system, and the process normally lasts for 28-32 hours.
In order to prevent water in the air from being brought into the system and reacting with sulfur dioxide and sulfur trioxide to form acid corrosion, the air needs to be dried by concentrated sulfuric acid, and the concentration of the concentrated sulfuric acid is reduced due to water absorption.
In the production state of the sulfuric acid production system, because a large amount of fresh sulfuric acid is generated, the concentrated sulfuric acid concentration can still be maintained after water absorption, but when the sulfuric acid production system is stopped and purged, no fresh sulfuric acid is used for maintaining the concentrated sulfuric acid concentration, so the concentrated sulfuric acid concentration cannot be maintained, a large amount of finished 98% sulfuric acid has to be added into the system, the finished 98% sulfuric acid absorbs moisture to cause a large amount of unqualified acid production (the concentration of the finished 98% sulfuric acid is generally lower than 96%), and generally, about 1000 tons of low-concentration unqualified acid production are generated every time the sulfuric acid production system is stopped.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a sulfuric acid production system and a method for controlling the acid concentration of a purging device, and solves the technical problem that a large amount of unqualified acid is produced due to the fact that a large amount of 98% finished sulfuric acid is added into the system when the sulfuric acid production system is stopped and purged in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a sulfuric acid production system comprising
A purge unit for introducing air and driving the air to displace sulfur dioxide and/or sulfur trioxide gases within the sulfuric acid production system; wherein the purging device comprises
The moisture removing device is used for removing moisture in the air introduced by the blowing device; wherein the water removing device comprises
A drying tower configured as an air container;
a sulfuric acid introduction line;
an underground fuming sulfuric acid tank;
the fuming sulfuric acid production device is communicated with the fuming sulfuric acid underground tank through a process pipeline;
when the sulfuric acid production system is used for producing sulfuric acid, the sulfuric acid introducing pipeline is used for introducing at least part of the sulfuric acid produced by the sulfuric acid production system into the drying tower to absorb the air moisture in the drying tower;
when the sulfuric acid production system stops producing, the fuming sulfuric acid underground tank guides the fuming sulfuric acid produced by the fuming sulfuric acid production device into the drying tower so as to absorb the moisture in the air in the drying tower.
As a preferable scheme of the invention, the sulfuric acid production system also comprises a 98% sulfuric acid finished product storage tank.
As a preferable scheme of the present invention, the moisture removal device further includes an acid production line, and the acid production line is configured to send sulfuric acid having a concentration of not less than 98% and formed by absorbing air moisture in the drying tower to the 98% sulfuric acid finished product storage tank for storage.
As a preferable aspect of the present invention, the oleum production apparatus includes an oleum tank that is also communicated with the underground fuming sulfuric acid tank through a process line to supply acid to the underground fuming sulfuric acid tank.
As a preferable aspect of the present invention, the moisture removing device further includes a recovery line for sending sulfuric acid having a concentration of less than 98% formed by absorbing moisture in air in the drying tower into the oleum production device.
Method for controlling acid concentration of purging device based on sulfuric acid production system, wherein the method is suitable for being used when the sulfuric acid production system is shut down, and the method comprises the following steps
Before introducing the air dried in the drying tower into the sulfuric acid production system to replace sulfur dioxide and/or sulfur trioxide gas in the sulfuric acid production system, drying the air in the drying tower by using the oleum produced by the oleum production device.
As a preferred embodiment of the present invention, the method further comprises
When the production of the sulfuric acid production system is stopped and the fuming sulfuric acid production device does not produce or just produces the fuming sulfuric acid, the sulfuric acid with the concentration of less than 98 percent formed by absorbing the moisture in the drying tower is sent into the fuming sulfuric acid production device to be used as a fuming sulfuric acid production material. In order to solve the above technical problems, the present invention further provides the following technical solutions:
the invention achieves the following beneficial effects:
according to the invention, the fuming sulfuric acid production device is directly integrated into the sulfuric acid production system, the fuming sulfuric acid produced by the fuming sulfuric acid production device is used as a drying agent of air in the sulfuric acid production system, the fuming sulfuric acid after absorbing water can be used as a 98% sulfuric acid finished product, and the sulfuric acid with the concentration lower than 98% generated in the process when the sulfuric acid production system stops producing and the fuming sulfuric acid production device does not produce or just produces the fuming sulfuric acid can be used as a production raw material of the fuming sulfuric acid production device.
Drawings
FIG. 1 is a schematic flow diagram of a sulfuric acid production system provided by the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the present invention provides a sulfuric acid production system comprising a purge unit for introducing air and driving the air to displace sulfur dioxide and/or sulfur trioxide gas within the sulfuric acid production system; the purging device comprises a moisture removing device, and the moisture removing device is used for removing moisture in air introduced by the purging device; wherein the moisture removing device includes a drying tower configured as an air container; a sulfuric acid introduction line; an underground fuming sulfuric acid tank; the fuming sulfuric acid production device is communicated with the fuming sulfuric acid underground tank through a process pipeline; when the sulfuric acid production system is used for producing, the sulfuric acid introducing pipeline is used for introducing at least part of the sulfuric acid produced by the sulfuric acid production system into the drying tower 3 so as to absorb the moisture in the air in the drying tower 3; when the sulfuric acid production system stops production, the fuming sulfuric acid underground tank 5 guides the fuming sulfuric acid produced by the fuming sulfuric acid production device 6 into the drying tower 3 to absorb moisture in the air in the drying tower 3.
Wherein, the sulfuric acid production system also comprises a 98 percent sulfuric acid finished product storage tank 7.
Since the moisture in the air is negligible compared to the sulfuric acid produced by the sulfuric acid production system, the produced sulfuric acid is able to remove the moisture without affecting the quality of the final product.
Therefore, the moisture removal device also comprises an acid production pipeline, and the acid production pipeline is used for sending the sulfuric acid with the concentration not lower than 98 percent formed by absorbing the moisture in the air in the drying tower to a 98 percent sulfuric acid finished product storage tank for storage.
It is considered difficult for the oleum production apparatus to provide sufficient oleum.
Therefore, the oleum production device comprises an oleum storage tank which is also communicated with the oleum underground tank through a process pipeline so as to supply acid to the oleum underground tank.
In order to reduce the waste of sulfuric acid below 98% and which can be used as a raw material for oleum production.
Therefore, the moisture removal device further comprises a recovery line for feeding sulfuric acid having a concentration of less than 98% formed by absorbing moisture in the air in the drying tower into the oleum production device.
The invention also provides a method for controlling the acid outlet concentration of the purging device based on the sulfuric acid production system, which is suitable for the shutdown of the sulfuric acid production system.
The method also comprises the step of sending the sulfuric acid with the concentration of less than 98 percent formed by absorbing the moisture in the air in the drying tower into the fuming sulfuric acid production device to be used as a fuming sulfuric acid production material when the sulfuric acid production system stops producing and the fuming sulfuric acid production device does not produce or just produces the fuming sulfuric acid.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The sulfuric acid production system is characterized by comprising
A purge unit for introducing air and driving the air to displace sulfur dioxide and/or sulfur trioxide gas within the sulfuric acid production system; wherein the purging device comprises
The moisture removing device is used for removing moisture in the air introduced by the blowing device; wherein the water removing device comprises
A drying tower configured as an air container;
a sulfuric acid introduction line;
an underground fuming sulfuric acid tank;
the fuming sulfuric acid production device is communicated with the fuming sulfuric acid underground tank through a process pipeline;
when the sulfuric acid production system is used for producing sulfuric acid, the sulfuric acid introducing pipeline is used for introducing at least part of the sulfuric acid produced by the sulfuric acid production system into the drying tower to absorb the air moisture in the drying tower;
when the sulfuric acid production system stops production, the fuming sulfuric acid underground tank guides the fuming sulfuric acid produced by the fuming sulfuric acid production device into the drying tower so as to absorb the moisture in the air in the drying tower.
2. The sulfuric acid production system of claim 1 further comprising a 98% finished sulfuric acid storage tank.
3. The sulfuric acid production system of claim 2, wherein the moisture removal device further comprises an acid production line for sending sulfuric acid with a concentration of not less than 98% formed by absorbing air moisture in the drying tower to the 98% sulfuric acid finished product storage tank for storage.
4. The sulfuric acid production system of claim 3, wherein the oleum production device comprises an oleum tank that is also in communication with the underground fuming sulfuric acid tank through a process line to supply acid to the underground fuming sulfuric acid tank.
5. The sulfuric acid production system of claim 4, wherein the moisture removal device further comprises a recovery line for sending sulfuric acid having a concentration of less than 98% formed by absorption of air moisture in the drying tower to the oleum production device.
6. The method for controlling the acid concentration of the purging device of the sulfuric acid production system according to claim 5, wherein the method is suitable for being used when the sulfuric acid production system is shut down, and the method comprises the following steps
Before introducing the air dried in the drying tower into the sulfuric acid production system to replace sulfur dioxide and/or sulfur trioxide gas in the sulfuric acid production system, drying the air in the drying tower by using the oleum produced by the oleum production device.
7. The method for controlling acid outlet concentration of a purging device according to claim 6, further comprising feeding sulfuric acid with concentration lower than 98% formed by absorbing moisture in air in the drying tower into the oleum production device as oleum production material when the production of oleum is stopped and the oleum production device is not producing or just producing oleum in the sulfuric acid production system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210802721.9A CN115259104B (en) | 2022-07-07 | 2022-07-07 | Sulfuric acid production system and method for controlling acid concentration of purging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210802721.9A CN115259104B (en) | 2022-07-07 | 2022-07-07 | Sulfuric acid production system and method for controlling acid concentration of purging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115259104A true CN115259104A (en) | 2022-11-01 |
| CN115259104B CN115259104B (en) | 2024-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210802721.9A Active CN115259104B (en) | 2022-07-07 | 2022-07-07 | Sulfuric acid production system and method for controlling acid concentration of purging device |
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| Country | Link |
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| CN (1) | CN115259104B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2364213A (en) * | 1942-03-21 | 1944-12-05 | Du Pont | Manufacture of sulphuric acid by the contact process |
| US4490347A (en) * | 1983-02-07 | 1984-12-25 | E. I. Du Pont De Nemours And Company | Process for sulfuric acid regeneration |
| JPS61136903A (en) * | 1984-12-07 | 1986-06-24 | Nippon Mining Co Ltd | Manufacturing apparatus of high-purity sulfuric acid |
| CN106573774A (en) * | 2014-05-09 | 2017-04-19 | 奥图泰(芬兰)公司 | Process and plant for the production of liquid acid |
| CN107051124A (en) * | 2017-03-24 | 2017-08-18 | 鲁西化工集团股份有限公司 | The environmentally friendly recovery system and technique of a kind of emptying storage tank gas |
| CN209226584U (en) * | 2018-11-20 | 2019-08-09 | 惠州市百利宏晟安化工有限公司 | Acid-scrubbing cleaning-absorption process reagent of sulfuric acid manufacture production system |
| CN215249581U (en) * | 2021-06-28 | 2021-12-21 | 南京科达新控仪表有限公司 | Smelting flue gas acid making dry absorption device |
-
2022
- 2022-07-07 CN CN202210802721.9A patent/CN115259104B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2364213A (en) * | 1942-03-21 | 1944-12-05 | Du Pont | Manufacture of sulphuric acid by the contact process |
| US4490347A (en) * | 1983-02-07 | 1984-12-25 | E. I. Du Pont De Nemours And Company | Process for sulfuric acid regeneration |
| JPS61136903A (en) * | 1984-12-07 | 1986-06-24 | Nippon Mining Co Ltd | Manufacturing apparatus of high-purity sulfuric acid |
| CN106573774A (en) * | 2014-05-09 | 2017-04-19 | 奥图泰(芬兰)公司 | Process and plant for the production of liquid acid |
| CN107051124A (en) * | 2017-03-24 | 2017-08-18 | 鲁西化工集团股份有限公司 | The environmentally friendly recovery system and technique of a kind of emptying storage tank gas |
| CN209226584U (en) * | 2018-11-20 | 2019-08-09 | 惠州市百利宏晟安化工有限公司 | Acid-scrubbing cleaning-absorption process reagent of sulfuric acid manufacture production system |
| CN215249581U (en) * | 2021-06-28 | 2021-12-21 | 南京科达新控仪表有限公司 | Smelting flue gas acid making dry absorption device |
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| Publication number | Publication date |
|---|---|
| CN115259104B (en) | 2024-04-26 |
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