CN115337754A - Tail gas treatment method and device of sulfur acid production system - Google Patents
Tail gas treatment method and device of sulfur acid production system Download PDFInfo
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- CN115337754A CN115337754A CN202210849201.3A CN202210849201A CN115337754A CN 115337754 A CN115337754 A CN 115337754A CN 202210849201 A CN202210849201 A CN 202210849201A CN 115337754 A CN115337754 A CN 115337754A
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- Prior art keywords
- tail gas
- sulfur
- sulfur dioxide
- diamine
- sodium sulfite
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 41
- 239000011593 sulfur Substances 0.000 title claims abstract description 41
- 239000002253 acid Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 152
- 150000004985 diamines Chemical class 0.000 claims abstract description 52
- 239000000243 solution Substances 0.000 claims abstract description 43
- 238000010521 absorption reaction Methods 0.000 claims abstract description 41
- 238000003795 desorption Methods 0.000 claims abstract description 35
- 239000007864 aqueous solution Substances 0.000 claims abstract description 19
- 238000003860 storage Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 86
- 239000007789 gas Substances 0.000 claims description 60
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 39
- 229940001482 sodium sulfite Drugs 0.000 claims description 39
- 235000010265 sodium sulphite Nutrition 0.000 claims description 39
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 35
- 239000007788 liquid Substances 0.000 claims description 29
- 238000002425 crystallisation Methods 0.000 claims description 16
- 230000008025 crystallization Effects 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 14
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 13
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 claims description 12
- 239000003513 alkali Substances 0.000 claims description 7
- 229940101006 anhydrous sodium sulfite Drugs 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000002918 waste heat Substances 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 claims description 2
- 238000004090 dissolution Methods 0.000 claims description 2
- 235000010269 sulphur dioxide Nutrition 0.000 claims 15
- 239000004291 sulphur dioxide Substances 0.000 claims 1
- 239000003595 mist Substances 0.000 abstract description 3
- 230000007935 neutral effect Effects 0.000 abstract description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000003518 caustics Substances 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
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
Images
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
- B01D53/14—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
- B01D53/1418—Recovery of products
-
- 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
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/14—Preparation of sulfites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/204—Amines
- B01D2252/2041—Diamines
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a tail gas treatment method and a device of a sulfur acid making system, which comprises a tail gas absorption tower, wherein a tail gas discharge device of the sulfur acid making system is communicated with the tail gas absorption tower so as to guide the tail gas into the tail gas absorption tower; the device also comprises a desorption tower, an intermediate water tank is communicated with the desorption tower, the desorption tower is used for heating the diamine rich solution in the desorption tower to remove sulfur dioxide to form diamine barren solution, and the desorption towerOne side of the tail gas tank is provided with a gaseous sulfur dioxide storage tank, and the mass concentration of sulfur dioxide in the tail gas emission can be reduced to less than 50mg/m by using diamine aqueous solution 3 And the exhaust gas is neutral and free of acid mist.
Description
Technical Field
The invention relates to a tail gas treatment method and a tail gas treatment device of a sulfur acid preparation system, and belongs to the technical field of sulfuric acid preparation.
Background
The sulfur acid production system is limited by the conversion rate of sulfur dioxide to sulfur trioxide, which is generally 99%, so the exhaust gas emitted by the system generally contains a mass concentration of over 400mg/m 3 And the tail gas needs to be treated to less than 200mg/m 3 The discharge can be carried out, and the discharge index can be positioned to be less than 50mg/m < 3 > to meet the requirement of environmental protection. Therefore, all sulfur acid making devices need to continuously improve the absorption level of the sulfur dioxide in the tail gas.
The common sulfur dioxide tail gas absorption processes at present comprise a hydrogen peroxide method and a liquid caustic soda absorption method.
The hydrogen peroxide method is to oxidize sulfur dioxide in tail gas by hydrogen peroxide to generate dilute sulfuric acid, and then the dilute sulfuric acid enters a system for treatment.
The liquid caustic soda method is to use liquid caustic soda to absorb sulfur dioxide and produce a mixture solution of sodium sulfate and sodium sulfite under the condition of air bubbling.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a tail gas treatment method and a tail gas treatment device of a sulfur acid production system, which solve the problems that in the prior art, the tail gas treatment by a hydrogen peroxide method is easy to cause equipment corrosion, and the tail gas treatment by a liquid caustic soda method can generate new polluting (sulfate) to be treated.
In order to achieve the above object, the present invention adopts the following technical solutions:
a tail gas treatment method of a sulfur acid-making system comprises the following steps:
a, absorbing sulfur dioxide in tail gas by using a diamine aqueous solution in a tail gas absorption tower until the solution is saturated to obtain a diamine rich solution;
b, discharging diamine rich solution to a desorption tower;
c, preparing steam by using waste heat generated in the process of dissolving the sulfur through a sulfur acid preparation system, and heating diamine rich liquid in the desorption tower through the steam to remove sulfur dioxide to form diamine barren liquid;
d, leading the diamine barren solution back to the tail gas absorption tower to replace all or part of the diamine aqueous solution in the step a;
e, blowing the gaseous sulfur dioxide removed in the step c into a sulfuric acid main device of a sulfur-based acid making system or a sodium sulfite device of the sulfur-based acid making system;
and in said step e, the step of,
when gaseous sulfur dioxide is blown into a sulfuric acid main device of a sulfur-acid making system, the gaseous sulfur dioxide is used as a raw material for producing sulfur trioxide;
when gaseous sulfur dioxide is blown into a sodium sulfite device of a sulfur-to-acid system, liquid alkali is used for absorption to prepare sodium sulfite solution, or anhydrous sodium sulfite is prepared by crystallization and drying.
A device comprises a tail gas absorption tower, wherein a tail gas discharge device of a sulfur acid production system is communicated with the tail gas absorption tower so as to guide tail gas into the tail gas absorption tower, one side of the tail gas absorption tower is provided with a diamine aqueous solution generating device so as to absorb sulfur dioxide in the tail gas absorption tower by the guide-in diamine aqueous solution, and the other side of the tail gas absorption tower is provided with an intermediate water tank which is used for storing diamine rich liquid formed by absorbing the sulfur dioxide in the tail gas absorption tower;
the device comprises a middle water tank, a middle water tank and a desorption tower, wherein the middle water tank is communicated with the desorption tower, the desorption tower is used for heating diamine rich liquid in the middle water tank to remove sulfur dioxide to form diamine poor liquid, one side of the desorption tower is provided with a gaseous sulfur dioxide storage tank, and the gaseous sulfur dioxide storage tank is used for recovering the desorbed gaseous sulfur dioxide.
In a preferred embodiment of the present invention, a heat exchanger is disposed at one side of the desorption tower, and the heat exchanger is configured to partially convert heat of steam generated by residual heat during sulfur dissolution in the sulfur-to-acid system into diamine rich solution.
As a preferred scheme of the invention, the gaseous sulfur dioxide storage tank is connected with a sulfuric acid main device of a sulfur acid making system through a pipeline I;
the first pipeline is provided with a first valve.
As a preferred scheme of the invention, the gaseous sulfur dioxide storage tank is connected with a sodium sulfite device of a sulfur acid-making system through a second pipeline;
and the second pipeline is provided with a second valve.
In a preferred embodiment of the present invention, a liquid caustic soda generating device is disposed on one side of the sodium sulfite device of the sulfur-based acid making system, and the liquid caustic soda generating device is configured to provide liquid caustic soda to the sodium sulfite device of the sulfur-based acid making system to absorb sulfur dioxide to form a sodium sulfite solution.
As a preferable scheme of the invention, a crystallization drying device is arranged on the other side of the sodium sulfite device of the sulfur acid-making system, and the crystallization drying device is used for making the sodium sulfite solution into anhydrous sodium sulfite.
The invention achieves the following beneficial effects:
the invention utilizes an aqueous diamine solutionCan carry out the characteristic of selectivity to sulfur dioxide, set up diamine aqueous solution absorption tower, after sulfur dioxide in will exhaust absorbs, can reduce the mass concentration of sulfur dioxide in the exhaust emission to less than 50mg/m 3 And the exhaust gas is neutral and free of acid mist.
The invention utilizes the low-grade steam self-produced by the waste heat of sulfuric acid in the desorption tower to heat the diamine rich solution so as to remove the absorbed sulfur dioxide, and the desorbed diamine poor solution enters the absorption tower again to absorb the sulfur dioxide, so that the diamine aqueous solution is recycled.
The sulfur dioxide gas removed from the desorption tower can be blown into the main sulfuric acid device again for reaction to produce sulfur trioxide, and can also enter a sodium sulfite production device to absorb sulfur dioxide by liquid alkali to produce sodium sulfite solution; because the purity of the sulfur dioxide produced by desorption is high, the waste gas is less, the product purity of the sodium sulfite production device can be greatly improved, the volume of the device is reduced, and the energy consumption is reduced; the produced sodium sulfite solution can be directly sent to a chlor-alkali production device for use and can also be dried through crystallization to directly produce a marketable sodium sulfite finished product.
Drawings
Fig. 1 is a schematic structural diagram of a preferred embodiment of the device provided by the present invention.
The meaning of the reference symbols in the figures:
1-tail gas absorption tower; 2-a tail gas discharge device; a 3-diamine aqueous solution generating device; 4-an intermediate water tank; 5-a desorption tower; 6-a gaseous sulfur dioxide storage tank; 7-a heat exchanger; 8-sulfuric acid main device; 9-sodium sulfite apparatus; 10-liquid caustic generation means; 11-crystallization drying device.
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 tail gas treatment method for a sulfur acid production system, comprising the following steps:
a, absorbing sulfur dioxide in tail gas by using a diamine aqueous solution in a tail gas absorption tower 1 until the solution is saturated to obtain a diamine rich solution;
b, discharging the diamine rich solution to a desorption tower 5;
c, preparing steam by using waste heat generated when the sulfur is dissolved in the sulfur-acid preparation system, and heating the diamine rich solution in the desorption tower 5 by using the steam to remove sulfur dioxide to form a diamine barren solution;
d, leading the diamine barren solution back to the tail gas absorption tower 1 to replace all or part of the diamine aqueous solution in the step a;
e, blowing the gaseous sulfur dioxide removed in the step c into a sulfuric acid main device 8 of the sulfur-based acid making system or a sodium sulfite device 9 of the sulfur-based acid making system;
and in said step e, the step of,
when gaseous sulfur dioxide is blown into a sulfuric acid main device 8 of a sulfur-acid making system, the gaseous sulfur dioxide is used as a raw material for producing sulfur trioxide;
when gaseous sulfur dioxide is blown into a sodium sulfite device 9 of the sulfur-acid making system, liquid alkali is used for absorption to prepare sodium sulfite solution, or anhydrous sodium sulfite is prepared by crystallization and drying.
The invention also provides a device, which comprises a tail gas absorption tower 1, wherein a tail gas discharge device 2 of the sulfur acid production system is communicated with the tail gas absorption tower 1 to guide tail gas into the tail gas absorption tower 1, one side of the tail gas absorption tower 1 is provided with a diamine aqueous solution generating device 3 to absorb sulfur dioxide in the tail gas absorption tower 1 by guiding diamine aqueous solution, the other side of the tail gas absorption tower 1 is provided with an intermediate water tank 4, and the intermediate water tank 4 is used for storing diamine rich liquid formed by absorbing the sulfur dioxide in the tail gas absorption tower 1; the device is characterized by further comprising a desorption tower 5, wherein the intermediate water tank 4 is communicated with the desorption tower 5, the desorption tower 5 is used for heating diamine rich liquid in the desorption tower to remove sulfur dioxide to form diamine barren liquid, a gaseous sulfur dioxide storage tank 6 is arranged on one side of the desorption tower 5, and the gaseous sulfur dioxide storage tank 6 is used for recovering the desorbed gaseous sulfur dioxide.
Since gaseous sulfur dioxide can be recovered in several ways, it is first stored using gaseous sulfur dioxide storage tank 6.
In order to realize the recovery and utilization of energy, preferably, a heat exchanger 7 is arranged on one side of the desorption tower 5, and the heat exchanger 7 is used for partially converting the heat of the steam generated by the sulfur acid-making system due to the residual heat generated when the sulfur is dissolved into the diamine rich solution.
In order to realize various recovery modes of the gaseous sulfur dioxide, preferably, the gaseous sulfur dioxide storage tank 6 is connected with a sulfuric acid main device 8 of the sulfur acid-making system through a pipeline I; the first pipeline is provided with a first valve. The gaseous sulfur dioxide storage tank 6 is connected with a sodium sulfite device 9 of a sulfur acid-making system through a pipeline II; and the second pipeline is provided with a second valve.
In the invention, a liquid caustic soda generating device 10 is arranged on one side of a sodium sulfite device 9 of the sulfur acid-making system, and the liquid caustic soda generating device 10 is used for providing liquid caustic soda to the sodium sulfite device 9 of the sulfur acid-making system to absorb sulfur dioxide to form a sodium sulfite solution. 9 opposite sides of sodium sulfite device of sulphur system of making sour system are equipped with crystallization drying device 11, crystallization drying device 11 is used for making anhydrous sodium sulfite with sodium sulfite solution.
According to the above device, when the amount of the recovered gaseous sulfur dioxide is large, the consumption of the stored amount of the gaseous sulfur dioxide can be accelerated by simultaneously opening the first pipeline and the second pipeline, and when the amount of the recovered gaseous sulfur dioxide is small, the first pipeline and the second pipeline can be alternatively opened.
When the crystallization drying device 11 is not started, the articles in the crystallization drying device 11 are sodium sulfite solution, and when the crystallization drying device 11 is started, the finished anhydrous sodium sulfite can be prepared in the crystallization drying device 11.
The invention utilizes the characteristic that the diamine aqueous solution can selectively carry out sulfur dioxide, establishes the diamine aqueous solution absorption tower, can reduce the mass concentration of the sulfur dioxide in the tail gas emission to a level less than 50mg/m < 3 > after absorbing the sulfur dioxide in the tail gas, and the exhaust gas is neutral and does not contain acid mist.
The invention utilizes the low-grade steam self-produced by the waste heat of sulfuric acid in the desorption tower to heat the diamine rich solution so as to remove the absorbed sulfur dioxide, and the desorbed diamine poor solution enters the absorption tower again to absorb the sulfur dioxide, so that the diamine aqueous solution is recycled.
The sulfur dioxide gas removed from the desorption tower can be blown into the main sulfuric acid device again for reaction to produce sulfur trioxide, and can also enter a sodium sulfite production device to absorb sulfur dioxide by liquid alkali to produce sodium sulfite solution; because the purity of the sulfur dioxide produced by desorption is high, the waste gas is less, the product purity of the sodium sulfite production device can be greatly improved, the volume of the device is reduced, and the energy consumption is reduced; the produced sodium sulfite solution can be directly sent to a chlor-alkali production device for use and can also be dried through crystallization so as to directly produce a saleable sodium sulfite finished product.
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 tail gas treatment method of the sulfur acid production system is characterized by comprising the following steps:
a, absorbing sulfur dioxide in tail gas by using a diamine aqueous solution in a tail gas absorption tower until the solution is saturated to obtain a diamine rich solution;
b, discharging the diamine rich solution to a desorption tower;
c, preparing steam by using waste heat generated when the sulfur is dissolved in the sulfur-acid preparation system, and heating the diamine rich solution in the desorption tower by using the steam to remove sulfur dioxide to form a diamine barren solution;
d, leading the diamine barren solution back to the tail gas absorption tower to replace all or part of the diamine aqueous solution in the step a;
e, blowing the gaseous sulfur dioxide removed in the step c into a sulfuric acid main device of a sulfur-based acid making system or a sodium sulfite device of the sulfur-based acid making system;
and in said step e, the step of,
when gaseous sulfur dioxide is blown into a sulfuric acid main device of a sulfur-to-acid system, the gaseous sulfur dioxide is used as a raw material for producing sulfur trioxide;
when gaseous sulfur dioxide is blown into a sodium sulfite device of a sulfur-to-acid system, liquid alkali is used for absorption to prepare sodium sulfite solution, or anhydrous sodium sulfite is prepared by crystallization and drying.
2. The device for implementing the tail gas treatment method is characterized by comprising a tail gas absorption tower (1), wherein a tail gas discharge device (2) of the sulfur acid production system is communicated with the tail gas absorption tower (1) so as to guide tail gas into the tail gas absorption tower (1), a diamine aqueous solution generating device (3) is arranged on one side of the tail gas absorption tower (1) so as to absorb sulfur dioxide in the tail gas absorption tower (1) by the introduced diamine aqueous solution, an intermediate water tank (4) is arranged on the other side of the tail gas absorption tower (1), and the intermediate water tank (4) is used for storing a diamine rich solution formed by absorbing the sulfur dioxide in the tail gas absorption tower (1);
the device is characterized by further comprising a desorption tower (5), wherein the intermediate water tank (4) is communicated with the desorption tower (5), the desorption tower (5) is used for heating diamine rich liquid in the desorption tower to remove sulfur dioxide to form diamine barren liquid, a gaseous sulfur dioxide storage tank (6) is arranged on one side of the desorption tower (5), and the gaseous sulfur dioxide storage tank (6) is used for recovering the desorbed gaseous sulfur dioxide.
3. The device according to claim 2, characterized in that a heat exchanger (7) is arranged at one side of the desorption tower (5), and the heat exchanger (7) is used for partially converting the heat of the steam generated by the residual heat in the sulfur acid-making system during the sulfur dissolution into the diamine rich solution.
4. The apparatus according to claim 2, wherein the gaseous sulfur dioxide storage tank (6) is connected to a sulfuric acid main unit (8) of the sulfuric acid production system via a line I;
the first pipeline is provided with a first valve.
5. The plant according to claim 4, wherein the gaseous sulphur dioxide storage tank (6) is connected via line two to a sodium sulphite plant (9) of a sulphur acid production system;
and the second pipeline is provided with a second valve.
6. The apparatus according to claim 5, characterized in that a liquid caustic soda generating device (10) is arranged on one side of the sodium sulfite device (9) of the sulfur-based acid production system, and the liquid caustic soda generating device (10) is used for providing liquid caustic soda to the sodium sulfite device (9) of the sulfur-based acid production system to absorb sulfur dioxide to form a sodium sulfite solution.
7. The device according to claim 6, characterized in that the other side of the sodium sulfite device (9) of the sulfur acid-making system is provided with a crystallization drying device (11), and the crystallization drying device (11) is used for making the sodium sulfite solution into anhydrous sodium sulfite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210849201.3A CN115337754A (en) | 2022-07-19 | 2022-07-19 | Tail gas treatment method and device of sulfur acid production system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210849201.3A CN115337754A (en) | 2022-07-19 | 2022-07-19 | Tail gas treatment method and device of sulfur acid production system |
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| CN115337754A true CN115337754A (en) | 2022-11-15 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2556388A1 (en) * | 1974-12-16 | 1976-06-24 | Union Carbide Corp | METHOD OF REMOVING SO DEEP 2 FROM A GAS STREAM BY ADSORPTION ON ACTIVATED CRYSTALLINE ZEOLITHIC MOLECULAR Sieve |
| CN1188022A (en) * | 1997-01-16 | 1998-07-22 | 杨再田 | Technological process for absorbing and converting sulfur dioxide gas |
| CN104368232A (en) * | 2014-10-22 | 2015-02-25 | 陕西华陆化工环保有限公司 | Sulfuric acid tail gas recovery device |
| CN108046219A (en) * | 2018-01-05 | 2018-05-18 | 江苏科瑞工程设计有限公司 | A kind of improved one turn of one absorption acid-making process |
-
2022
- 2022-07-19 CN CN202210849201.3A patent/CN115337754A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2556388A1 (en) * | 1974-12-16 | 1976-06-24 | Union Carbide Corp | METHOD OF REMOVING SO DEEP 2 FROM A GAS STREAM BY ADSORPTION ON ACTIVATED CRYSTALLINE ZEOLITHIC MOLECULAR Sieve |
| CN1188022A (en) * | 1997-01-16 | 1998-07-22 | 杨再田 | Technological process for absorbing and converting sulfur dioxide gas |
| CN104368232A (en) * | 2014-10-22 | 2015-02-25 | 陕西华陆化工环保有限公司 | Sulfuric acid tail gas recovery device |
| CN108046219A (en) * | 2018-01-05 | 2018-05-18 | 江苏科瑞工程设计有限公司 | A kind of improved one turn of one absorption acid-making process |
Non-Patent Citations (1)
| Title |
|---|
| 李东波著: "现代氧气底吹炼铅技术", 30 November 2020, 北京：冶金工业出版社, pages: 229 * |
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