CN221027702U - Multifunctional electronic grade sulfuric acid absorption tower - Google Patents
Multifunctional electronic grade sulfuric acid absorption tower Download PDFInfo
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- CN221027702U CN221027702U CN202322823439.1U CN202322823439U CN221027702U CN 221027702 U CN221027702 U CN 221027702U CN 202322823439 U CN202322823439 U CN 202322823439U CN 221027702 U CN221027702 U CN 221027702U
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- section
- absorption
- sulfuric acid
- tower
- heat exchange
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 134
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 122
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 238000003860 storage Methods 0.000 claims abstract description 22
- 239000000498 cooling water Substances 0.000 claims abstract description 12
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 11
- 239000012498 ultrapure water Substances 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 8
- -1 polytetrafluoroethylene Polymers 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 239000006096 absorbing agent Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000008213 purified water Substances 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000002745 absorbent Effects 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Landscapes
- Gas Separation By Absorption (AREA)
Abstract
The utility model relates to the technical field of electronic grade sulfuric acid production by an absorption method, in particular to a multifunctional electronic grade sulfuric acid absorption tower which is of a structure integrating circulating absorption and heat exchange and comprises an absorption tower body, wherein the absorption tower body comprises a liquid storage section, a heat exchange section, a multi-stage absorption section and a demisting section; the heat exchange section is positioned in the liquid storage section at the bottom of the tower, the absorption section is positioned at the middle upper part of the tower, and the demisting section is positioned at the top of the tower. According to the utility model, the liquid storage section, the heat exchange section, the absorption section, the demisting section and the like are sequentially arranged in the absorption tower body from bottom to top, the temperature of sulfuric acid in the tower is reduced by introducing circulating cooling water into the heat exchange section, and the liquid redistribution and the two-section absorption are performed by countercurrent contact of purified water or sulfuric acid and SO 3, SO that the absorption efficiency of SO 3 is improved, the effect of integrating circulating absorption and heat exchange is achieved, and the problems of complex absorption flow and high cost of electronic grade sulfuric acid are solved.
Description
Technical Field
The utility model relates to the technical field of electronic grade sulfuric acid production by an absorption method, in particular to a multifunctional electronic grade sulfuric acid absorption tower.
Background
The absorption tower is a device for realizing the absorption operation. The method mainly comprises a packed tower, a plate tower and the like, wherein countercurrent operation is usually adopted, an absorbent flows from top to bottom, contacts with gas flowing from bottom to top, liquid absorbing the absorbent is discharged from the bottom of the tower, and the absorbed gas is discharged from the top of the tower.
The electronic grade sulfuric acid production process mainly comprises a rectification method, an absorption method and the like, and the rectification method is gradually replaced by a gas absorption method with simple process, low energy consumption, high product quality and large production scale. The absorption method is to directly absorb the purified SO 3 gas with ultrapure water or ultrapure sulfuric acid, and mainly comprises five working procedures of SO 3 purification, SO 3 absorption, sulfuric acid cooling, precise filtration and tail gas treatment, and the flow is schematically shown in figure 2.
The existing electronic grade sulfuric acid absorption tower is generally a packed tower and mainly comprises an absorption section, and gas and liquid in the tower are in countercurrent contact. Such an absorber only completes the general absorption operation of SO 3, whereas the SO 3 absorption process is exothermic, and the lower the temperature, the more advantageous the absorption. For this reason, a cooler is generally employed after the absorber to remove heat so as to maintain absorption efficiency.
Disclosure of utility model
First, the technical problem to be solved
The utility model aims to solve the technical problems of complex flow, low SO 3 absorption efficiency, high cost and the like of an absorption method, and provides a multifunctional electronic grade sulfuric acid absorption tower.
(II) technical scheme
The utility model is realized by the following technical scheme: the multifunctional electronic grade sulfuric acid absorption tower is of a structure integrating circulating absorption and heat exchange, and comprises an absorption tower body, wherein the tower body comprises a liquid storage section, a heat exchange section, a multi-stage absorption section and a demisting section; the heat exchange section is positioned in the liquid storage section at the bottom of the tower, the absorption section is positioned at the middle upper part of the tower, and the demisting section is positioned at the top of the tower.
Furthermore, the upper part of the liquid storage section is provided with a cross vortex-proof plate.
By adopting the technical scheme, the design has the advantage of reducing subsequent storage tank equipment.
Further, the heat exchange section is provided with a tube type heat exchange tube, and the tower body is provided with a circulating cooling water inlet and a circulating cooling water outlet.
By adopting the technical scheme, the design has the advantages that reaction heat in the absorption process of SO 3 is removed in time, the cooling effect of sulfuric acid is realized, and the subsequent sulfuric acid cooler is reduced.
Further, the absorption section comprises an upper absorption section and a middle absorption section.
Further preferably, the upper absorption section and the middle absorption section are both provided with a liquid distributor and a filler layer.
Further preferably, the upper section absorption section is provided with an ultrapure water inlet pipe, and the middle section absorption section is provided with a circulating sulfuric acid inlet pipe.
Further, an SO 3 inlet pipe is arranged on the tower body between the absorption section and the liquid storage section.
Through adopting above-mentioned technical scheme, the advantage of design like this is that absorption distribution is more reasonable, is favorable to gas-liquid mass transfer, is favorable to improving absorbent (ultrapure water and sulfuric acid) and SO 3 absorption rate and reaction rate in the tower body, promotes the absorption effect.
Furthermore, the demisting section adopts a horizontal structure.
By adopting the technical scheme, the sulfuric acid mist carried in the gas phase can be effectively removed by the design.
Furthermore, the absorption tower is lined with polytetrafluoroethylene, and the liquid storage section vortex-preventing plate, the heat exchange pipe of the heat exchange section, the absorption section filler, the liquid distributor and the demisting section are made of polytetrafluoroethylene.
By adopting the technical scheme, the design has the advantage of anti-corrosion protection.
Further, a tail gas outlet pipe is arranged at the top of the absorption tower, and a sulfuric acid outlet pipe is arranged at the bottom of the absorption tower.
(III) beneficial effects
Compared with the prior art, the utility model has the following beneficial effects:
In order to solve the problems that the existing electronic grade sulfuric acid absorption tower is generally composed of an absorption section, only the general absorption operation of SO 3 is completed, the absorption process of the absorption tower is exothermic reaction, the lower the temperature is, the more favorable the absorption is, the temperature of the absorption sulfuric acid liquid is greatly increased along with the progress of the absorption operation, and the absorption efficiency is reduced along with the progress of the absorption operation. According to the utility model, the liquid storage section, the heat exchange section, the absorption section, the demisting section and the like are sequentially arranged in the absorption tower body from bottom to top, the temperature of sulfuric acid in the tower is reduced by introducing circulating cooling water into the heat exchange section, and the liquid redistribution and the two-section absorption are performed by countercurrent contact of purified water or sulfuric acid and SO 3, SO that the absorption efficiency of SO 3 is improved, the effect of integrating circulating absorption and heat exchange is achieved, and the problems of complex absorption flow and high cost of electronic grade sulfuric acid are solved.
Drawings
Fig. 1 is a schematic structural diagram of a multifunctional electronic grade sulfuric acid absorption tower according to an embodiment of the present utility model.
In the figure: 1-a tower body; 2-a filler layer (II); 3-a liquid distributor (II); 4-a filler layer (I); 5-a liquid distributor (I); 6-demister; 7-a tail gas outlet pipe; 8-an ultrapure water inlet pipe; 9-a circulating sulfuric acid inlet pipe; 10-SO 3 inlet pipe; 11-sulfuric acid heat exchange section; 12-circulating cooling water inlet; 13-a circulating cooling water outlet; 14-sulfuric acid outlet pipe.
Fig. 2 is a schematic diagram of the process flow of electronic grade sulfuric acid production by absorption method.
FIG. 3 is a schematic diagram of an electronic grade sulfuric acid production process using an absorber of an embodiment of the present utility model.
Description of the embodiments
The utility model will be further described with reference to the drawings and specific examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Examples
As shown in fig. 1, a multifunctional electronic grade sulfuric acid absorption tower in this embodiment mainly includes an absorption tower body 1, a liquid storage section is arranged at the bottom inside the absorption tower, and a cross vortex-preventing plate is arranged at the upper part of the liquid storage section; the liquid storage section is mainly used for collecting absorption solvents sprayed from the upper part and the middle part of the tower, can be circularly absorbed and used, reduces the running cost of the device, and meanwhile, the design of the section needs to keep a certain height, thereby ensuring the stability of the sulfuric acid liquid cooling and the running of an external running pump and the device of the sulfuric acid heat exchange section 11.
In the embodiment, as shown in fig. 1, sulfuric acid heat exchange tubes 11 are arranged in the liquid storage section, and a plurality of tube type heat exchange tubes are adopted, so that the number of the heat exchange tubes can be flexibly increased or reduced according to the heat exchange capacity requirement of the system; the tower body 1 is provided with a circulating cooling water inlet 12 and a circulating cooling water outlet 13; thereby realizing the change of the heat exchange area of the cooler and the cooling water quantity.
As shown in fig. 1, in this embodiment, the absorption section includes an upper section absorption section (i) and a middle section absorption section (ii), which are respectively provided with a liquid distributor (i) 5, a filler layer (i) 4, a liquid distributor (ii) 3, and a filler layer (ii) 2, the upper section absorption section is provided with an ultrapure water inlet pipe 8, and the middle section absorption section is provided with a circulating sulfuric acid inlet pipe 9; and an SO 3 inlet pipe is arranged on the tower body between the absorption section and the liquid storage section.
The embodiment adopts an upper section absorption tower and a middle section absorption tower, which is equivalent to a two-stage absorption tower, and can also be provided with a plurality of stages of absorption according to production requirements; the gas after two-stage absorption is discharged from a tail gas outlet pipe 7 at the top of the tower through a demister 6 horizontally arranged at a demisting section, and an ultrapure water inlet pipe 8 is communicated with ultrapure water; the circulating sulfuric acid inlet pipe 9 is communicated with the sulfuric acid cooled by the heat exchange section through a sulfuric acid outlet pipe 14; the purified SO 3 enters the tower from an SO 3 inlet pipe 10 and is in countercurrent contact with pure water and dilute sulfuric acid of a circulating sulfuric acid inlet pipe 9 of an ultrapure water inlet pipe 8 on and in the middle of the tower from bottom to top; the absorption system can effectively improve absorption efficiency, increase sulfuric acid concentration and improve economic benefit.
In the embodiment, the absorption tower is lined with polytetrafluoroethylene, and the materials of the liquid storage section vortex-preventing plate, the heat exchange pipe of the heat exchange section, the filler of the absorption section, the liquid distributor and the demisting section are polytetrafluoroethylene.
Referring to fig. 3, the implementation procedure of this embodiment is as follows: during absorption operation of the absorption tower, purified SO 3 enters the tower from an SO 3 inlet pipe 10, absorbent ultrapure water enters from an ultrapure water inlet pipe 8 on an absorption section (I), is uniformly distributed under the action of a liquid distributor (I) and a structured packing layer (I) in the absorption section (I), and is in countercurrent contact with SO 3 from bottom to top to react to generate sulfuric acid; the generated sulfuric acid continuously contacts with SO 3 from bottom to top in countercurrent in an absorption section (II) from top to bottom, and the sulfuric acid is generated by reaction; the SO 3 from bottom to top is absorbed by pure water and sulfuric acid in an absorption section (I) and an absorption section (II) in the tower, and is discharged to a recovery system through a tail gas outlet pipe 7 after sulfuric acid mist and water vapor carried in a gas phase are removed through a demister 6; sulfuric acid generated by the reaction is gathered to the lower liquid storage section from top to bottom, the sulfuric acid heat exchange section 11 is cooled, reaction heat is removed, the main structure of the sulfuric acid heat exchange section 11 is a tube type heat exchange tube with two ends communicated, and normal flow of heat exchange cooling water in the sulfuric acid heat exchange section 11 can be ensured; the cooled sulfuric acid is led out from a sulfuric acid outlet pipe 14, led out from a circulating pump to a circulating sulfuric acid inlet pipe 9 for circulating use, and led into a degassing tower, an intermediate storage tank and an ultra-clean filter in the next working procedure when the concentration of the sulfuric acid reaches more than 95%, and finally led into a finished product storage tank.
Claims (10)
1. A multifunctional electronic grade sulfuric acid absorption tower is characterized in that the absorption tower is of a structure integrating circulating absorption and heat exchange, and comprises an absorption tower body, wherein the tower body comprises a liquid storage section, a heat exchange section, a multi-stage absorption section and a demisting section; the heat exchange section is positioned in the liquid storage section at the bottom of the tower, the absorption section is positioned at the middle upper part of the tower, and the demisting section is positioned at the top of the tower.
2. The multi-functional electronic grade sulfuric acid absorption tower of claim 1, wherein: the upper part of the liquid storage section is provided with a cross vortex-proof plate.
3. The multi-functional electronic grade sulfuric acid absorption tower of claim 1, wherein: the heat exchange section is provided with a tube type heat exchange tube, and a circulating cooling water inlet and a circulating cooling water outlet are arranged on the tower body.
4. The multi-functional electronic grade sulfuric acid absorption tower of claim 1, wherein: the absorption section comprises an upper section absorption section and a middle section absorption section.
5. The multi-functional electronic grade sulfuric acid absorption tower according to claim 4, wherein: the upper section absorption section and the middle section absorption section are both provided with a liquid distributor and a filler layer.
6. A multi-functional electronic grade sulfuric acid absorber according to claim 4 or 5, characterized in that: the upper section absorption section is provided with an ultrapure water inlet pipe, and the middle section absorption section is provided with a circulating sulfuric acid inlet pipe.
7. The multi-functional electronic grade sulfuric acid absorption tower of claim 1, wherein: and an SO 3 inlet pipe is arranged on the tower body between the absorption section and the liquid storage section.
8. The multi-functional electronic grade sulfuric acid absorption tower of claim 1, wherein: the demisting section adopts a horizontal structure.
9. The multi-functional electronic grade sulfuric acid absorption tower of claim 1, wherein: the top of the absorption tower is provided with a tail gas outlet pipe, and the bottom of the absorption tower is provided with a sulfuric acid outlet pipe.
10. The multifunctional electronic grade sulfuric acid absorption tower according to claim 1 or 9, characterized in that: and the absorption tower is lined with polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322823439.1U CN221027702U (en) | 2023-10-20 | 2023-10-20 | Multifunctional electronic grade sulfuric acid absorption tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322823439.1U CN221027702U (en) | 2023-10-20 | 2023-10-20 | Multifunctional electronic grade sulfuric acid absorption tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221027702U true CN221027702U (en) | 2024-05-28 |
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ID=91180533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322823439.1U Active CN221027702U (en) | 2023-10-20 | 2023-10-20 | Multifunctional electronic grade sulfuric acid absorption tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221027702U (en) |
-
2023
- 2023-10-20 CN CN202322823439.1U patent/CN221027702U/en active Active
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