CN220861101U - Sulfur dioxide converter and conversion system comprising same - Google Patents
Sulfur dioxide converter and conversion system comprising same Download PDFInfo
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- CN220861101U CN220861101U CN202322453746.5U CN202322453746U CN220861101U CN 220861101 U CN220861101 U CN 220861101U CN 202322453746 U CN202322453746 U CN 202322453746U CN 220861101 U CN220861101 U CN 220861101U
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- heat exchanger
- conversion section
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- converter
- inlet
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 105
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 239000003054 catalyst Substances 0.000 claims abstract description 42
- 239000000498 cooling water Substances 0.000 claims abstract description 32
- 238000010521 absorption reaction Methods 0.000 claims abstract description 20
- 239000007789 gas Substances 0.000 claims description 68
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 47
- 239000003546 flue gas Substances 0.000 claims description 47
- 239000006096 absorbing agent Substances 0.000 claims description 5
- 235000010269 sulphur dioxide Nutrition 0.000 claims 4
- 239000004291 sulphur dioxide Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 8
- 238000005192 partition Methods 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a sulfur dioxide converter and a conversion system comprising the same, wherein the conversion system comprises a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, an intermediate absorption tower and a final absorption tower; the converter comprises a shell, wherein the inside of the shell is divided into a plurality of conversion sections, a catalyst layer is arranged in each conversion section, and a gas distribution assembly is arranged in the shell above the catalyst layer in each conversion section; the catalyst layer of the topmost conversion section is internally provided with a temperature control pipeline, cooling water is introduced into the temperature control pipeline, and the cooling water absorbs heat generated by oxidation reaction, so that the temperature of the catalyst layer and the inside of the conversion section where the catalyst layer is positioned is reduced, the activity of the catalyst is ensured, and the conversion efficiency of sulfur dioxide is improved.
Description
Technical field:
The utility model relates to the technical field of sulfur dioxide conversion, in particular to a sulfur dioxide converter and a conversion system comprising the same.
The background technology is as follows:
The nonferrous metal ore is generally symbiotic with sulfur, sulfur reacts with oxygen in the smelting process to generate SO 2 flue gas, and the SO 2 flue gas is converted by using a catalyst (catalyst) to react with oxygen to generate SO 3,SO3 which reacts with water to become sulfuric acid; the sulfur dioxide converter is an important device for industrial sulfuric acid production, the SO 2 concentration of the flue gas entering the converter is required to be less than 12% in consideration of the activity of the catalyst and the service life of the device, if the SO 2 concentration in the flue gas exceeds 12%, air or oxygen is required to be introduced to ensure enough oxygen content, but the heat released by the oxidation reaction cannot be controlled, generally, after the flue gas SO 2 is converted for the first time by the converter, the temperature of the gas exceeds the heat-resistant temperature of the catalyst, the activity of the catalyst is influenced, the conversion efficiency of sulfur dioxide is not high, the converter is operated at a high temperature exceeding 600 ℃ for a long time, and the device is damaged.
The utility model comprises the following steps:
The utility model aims to provide a sulfur dioxide converter, which solves the problems that the heat released by oxidation reaction can not be controlled due to high concentration of SO 2 in flue gas, the catalyst is easy to deactivate, and the conversion efficiency of sulfur dioxide is low.
The first object of the utility model is implemented by the following technical scheme: the sulfur dioxide converter comprises a shell, a partition board, a catalyst layer, a gas distribution assembly, a temperature control pipeline, a cooling water inlet pipe and a cooling water drain pipe, wherein a plurality of partition boards are arranged in the shell at intervals along the vertical direction, the shell is divided into a plurality of conversion sections by the plurality of partition boards, the catalyst layer is arranged in each conversion section, and the gas distribution assembly is arranged above the catalyst layer of each conversion section in the shell; the catalyst layer of the topmost conversion section is internally provided with a temperature control pipeline, one end of the temperature control pipeline penetrates through the shell to be communicated with the cooling water inlet pipe, and the other end of the temperature control pipeline penetrates through the shell to be communicated with the cooling water drain pipe.
Preferably, the gas distribution assembly comprises a gas distribution main pipe and gas distribution branch pipes, wherein the gas distribution branch pipes are welded on two sides of the gas distribution main pipe in a staggered mode, and a plurality of gas distribution holes are formed in the gas distribution branch pipes.
Preferably, three partition boards are arranged in the shell from top to bottom at intervals, and the three partition boards divide the shell into a first conversion section, a second conversion section, a third conversion section and a fourth conversion section from top to bottom in sequence.
The second purpose of the utility model is to provide a conversion system comprising a sulfur dioxide converter, which solves the problems of low conversion efficiency and low acid production efficiency of the existing sulfur dioxide conversion system.
The second object of the utility model is implemented by the following technical scheme: a conversion system comprising a sulfur dioxide converter, further comprising a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, an intermediate absorber, and a final absorber;
The outlet of the blower is communicated with the first inlet of the first heat exchanger, the first outlet of the first heat exchanger is communicated with the first inlet of the second heat exchanger, the first outlet of the second heat exchanger is communicated with the flue gas inlet of the first conversion section of the converter, the flue gas outlet of the first conversion section of the converter is communicated with the second inlet of the second heat exchanger, the second outlet of the second heat exchanger is communicated with the flue gas inlet of the second conversion section of the converter, the flue gas outlet of the second conversion section of the converter is communicated with the first inlet of the third heat exchanger, the first outlet of the third heat exchanger is communicated with the flue gas inlet of the third conversion section of the converter, the flue gas outlet of the third conversion section of the converter is communicated with the second inlet of the first heat exchanger, and the second outlet of the first heat exchanger is communicated with the gas inlet of the intermediate absorption tower; the gas outlet of the intermediate absorption tower is communicated with the first inlet of the fourth heat exchanger, the first outlet of the fourth heat exchanger is communicated with the second inlet of the third heat exchanger, the second outlet of the third heat exchanger is communicated with the flue gas inlet of the fourth conversion section of the converter, the flue gas outlet of the fourth conversion section of the converter is communicated with the second inlet of the fourth heat exchanger, and the second outlet of the fourth heat exchanger is communicated with the gas inlet of the final absorption tower.
Preferably, a temperature sensor is arranged at the flue gas outlet of the first conversion section, an electromagnetic valve is arranged on a cooling water inlet pipe of the converter, the temperature sensor is electrically connected with the input end of a controller, and the output end of the controller is electrically connected with the electromagnetic valve.
The utility model has the advantages that: firstly, the sulfur dioxide converter is provided with a temperature control pipeline in the catalyst layer of the first conversion section, two ends of the temperature control pipeline are respectively communicated with a cooling water inlet pipe and a cooling water drain pipe, cooling water is introduced into the temperature control pipeline, the cooling water exchanges heat with the catalyst layer to absorb heat generated by oxidation reaction, the temperature in the catalyst layer is reduced, and the activity of a catalyst is ensured, so that the conversion efficiency of sulfur dioxide is improved; the cooling water can take away the heat in the first conversion section when being discharged through the cooling water drain pipe, so that the first conversion section of the converter is prevented from running at the high temperature exceeding 600 ℃ for a long time, and the service life of equipment is prolonged;
And secondly, the gas distribution components are respectively arranged above the catalyst layers in each conversion section of the sulfur dioxide converter, sulfur dioxide flue gas is uniformly distributed through the gas distribution components and is fully mixed with oxygen introduced into the shell, so that the conversion efficiency of sulfur dioxide is further improved.
Third, the sulfur dioxide converter is matched with the first heat exchanger, the second heat exchanger, the third heat exchanger, the fourth heat exchanger, the middle absorption tower and the final absorption tower, so that the conversion efficiency of sulfur dioxide is improved, the acid making time is saved, and the competitiveness of enterprises is improved.
Description of the drawings:
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of embodiment 1.
Fig. 2 is a schematic structural view of the air distribution assembly.
Fig. 3 is a schematic structural diagram of embodiment 2.
Fig. 4 is a control schematic diagram of embodiment 2.
The components in the drawings are marked as follows: the heat exchanger comprises a first heat exchanger 1, a second heat exchanger 2, a third heat exchanger 3, a fourth heat exchanger 4, a converter 5, a shell 5.1, a first conversion section 5.1.1, a second conversion section 5.1.2, a third conversion section 5.1.3, a fourth conversion section 5.1.4, a baffle 5.2, a catalyst layer 5.3, a gas distribution assembly 5.4, a gas distribution main pipe 5.4.1, a gas distribution branch pipe 5.4.2, gas distribution holes 5.4.2.1, a temperature control pipeline 5.5, a cooling water inlet pipe 5.6, a cooling water drain pipe 5.7, a flue gas inlet 5.8, a flue gas outlet 5.9, an intermediate absorption tower 6, a final absorption tower 7, a blower 8, a solenoid valve 9, a temperature sensor 10 and a controller 11.
The specific embodiment is as follows:
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1: as shown in fig. 1-2, a sulfur dioxide converter comprises a shell 5.1, a baffle plate 5.2, a catalyst layer 5.3, a gas distribution assembly 5.4, a temperature control pipeline 5.5, a cooling water inlet pipe 5.6 and a cooling water outlet pipe 5.7; in the embodiment, three horizontally arranged partition boards 5.2 are arranged in the shell 5.1 at intervals from top to bottom, and the three partition boards 5.2 divide the shell 5.1 into a first conversion section 5.1.1, a second conversion section 5.1.2, a third conversion section 5.1.3 and a fourth conversion section 5.1.4 from top to bottom in sequence; the catalyst layer 5.3 is arranged in each conversion section, the catalyst layer 5.3 is used as a catalyst for conversion reaction, a flue gas inlet 5.8 is respectively formed in a shell 5.1 above the catalyst layer 5.3 in each conversion section, a flue gas outlet 5.9 is respectively formed in a shell 5.1 below the catalyst layer 5.3 in each conversion section, a gas distribution assembly 5.4 is arranged in the shell 5.1 above the catalyst layer 5.3 in each conversion section, the gas distribution assembly 5.4 comprises a gas distribution main pipe 5.4.1 and a gas distribution branch pipe 5.4.2, the gas distribution main pipes 5.4.1 are respectively and horizontally arranged in each conversion section, the flue gas inlets 5.8 of each conversion section are communicated with the gas distribution main pipe 5.4.1, a plurality of gas distribution holes 5.4.2.1 are formed in the gas distribution branch pipes 5.4.2, and the gas distribution holes 5.4.2.1 are welded at two sides of the gas distribution main pipe 5.4.1, so that sulfur dioxide is uniformly distributed in the gas distribution assembly 5.4 to be introduced into the shell 5.1, and the sulfur dioxide conversion efficiency is fully improved;
A temperature control pipeline 5.5 is arranged in the catalyst layer 5.3 of the first conversion section 5.1.1, one end of the temperature control pipeline 5.5 passes through the shell 5.1 and is communicated with the cooling water inlet pipe 5.6, the other end of the temperature control pipeline 5.5 passes through the shell 5.1 and is communicated with the cooling water drain pipe 5.7, cooling water is introduced into the temperature control pipeline 5.5 and exchanges heat with the catalyst layer 5.3 to absorb heat generated by oxidation reaction, the temperature in the catalyst layer 5.3 is reduced, the activity of a catalyst is ensured, and the conversion efficiency of sulfur dioxide is further improved; and the cooling water can take away the heat in the first conversion section 5.1.1 when being discharged through the cooling water drain pipe 5.7, so that the first conversion section 5.1.1 of the converter 5 is prevented from running at the high temperature exceeding 600 ℃ for a long time, and the service life of equipment is prolonged.
Example 2: as shown in fig. 3 to 4, a sulfur dioxide conversion system comprises a first heat exchanger 1, a second heat exchanger 2, a third heat exchanger 3, a fourth heat exchanger 4, a sulfur dioxide converter (simply referred to as a converter 5) in example 1, an intermediate absorption tower 6 and a final absorption tower 7;
The outlet of the blower 8 is communicated with the first inlet of the first heat exchanger 1 through a pipeline, the first outlet of the first heat exchanger 1 is communicated with the first inlet of the second heat exchanger 2 through a pipeline, the first outlet of the second heat exchanger 2 is communicated with the flue gas inlet 5.8 of the first conversion section 5.1.1 of the converter 5 through a pipeline, the flue gas outlet 5.9 of the first conversion section 5.1.1 of the converter 5 is communicated with the second inlet of the second heat exchanger 2 through a pipeline, the second outlet of the second heat exchanger 2 is communicated with the flue gas inlet 5.8 of the second conversion section 5.1.2 of the converter 5 through a pipeline, the flue gas outlet 5.9 of the second conversion section 5.1.2 of the converter 5 is communicated with the first inlet of the third heat exchanger 3 through a pipeline, the first outlet of the third heat exchanger 3 is communicated with the flue gas inlet 5.8 of the third conversion section 5.1.3 of the converter 5 through a pipeline, the flue gas outlet 5.9 of the third conversion section 5.1.3 of the converter 5 is communicated with the second inlet of the first heat exchanger 1 through a pipeline, and the gas outlet of the second heat exchanger 1 is communicated with the middle of the absorber tower through the second inlet 6;
The gas outlet of the intermediate absorption tower 6 is communicated with the first inlet of the fourth heat exchanger 4 through a pipeline, the first outlet of the fourth heat exchanger 4 is communicated with the second inlet of the third heat exchanger 3 through a pipeline, the second outlet of the third heat exchanger 3 is communicated with the flue gas inlet 5.8 of the fourth conversion section 5.1.4 of the converter 5 through a pipeline, the flue gas outlet 5.9 of the fourth conversion section 5.1.4 of the converter 5 is communicated with the second inlet of the fourth heat exchanger 4 through a pipeline, and the second outlet of the fourth heat exchanger 4 is communicated with the gas inlet of the final absorption tower 7 through a pipeline.
The cooling water inlet pipe 5.6 of the converter 5 is provided with an electromagnetic valve 9, the flue gas outlet 5.9 of the first conversion section 5.1.1 is provided with a temperature sensor 10, the temperature sensor 10 is electrically connected with the input end of the controller 11, the output end of the controller 11 is electrically connected with the electromagnetic valve 9, when the temperature sensor 10 detects that the flue gas discharged from the first conversion section 5.1.1 exceeds 597 ℃, a signal is transmitted to the controller 11, the electromagnetic valve 9 is controlled to be opened by the controller 11, cooling water enters the temperature control pipeline 5.5 through the cooling water inlet pipe 5.6 and exchanges heat with the catalyst layer 5.3 of the first conversion section 5.1.1, and heat in the catalyst layer 5.3 and the first conversion section 5.1.1 is taken away; when the temperature sensor 10 detects that the exhaust smoke from the first conversion section 5.1.1 is lower than 597 ℃, a signal is transmitted to the controller 11, and the controller 11 controls the electromagnetic valve 9 to be closed, so that the first conversion section 5.1.1 operates normally.
The working process comprises the following steps: when the concentration of SO 2 in the flue gas exceeds 12%, the flue gas sequentially enters a first heat exchanger 1 and a second heat exchanger 2 through a blower 8 to perform heat exchange and temperature rise, sulfur dioxide flue gas is preheated to 425 ℃, the gas enters a corresponding gas distribution assembly 5.4 through a flue gas inlet 5.8 of a first conversion section 5.1.1, and then undergoes a first conversion reaction with oxygen in a shell 5.1 under the catalysis of a catalyst to generate sulfur trioxide and release reaction heat, the reacted gas is discharged from a flue gas outlet 5.9 of the first conversion section 5.1.1, a temperature sensor 10 detects that the temperature of the flue gas discharged from the first conversion section 5.1.1 exceeds 597 ℃, a signal is transmitted to a controller 11, the controller 11 controls a solenoid valve 9 to be opened, cooling water enters a temperature control pipeline 5.5 through a cooling water inlet pipe 5.6 to perform heat exchange with a catalyst layer 5.3 of the first conversion section 5.1.1, and heat in the catalyst layer 5.3 and the first conversion section 5.1.1 is taken away; when the temperature sensor 10 detects that the smoke discharged from the first conversion section 5.1.1 is lower than 597 ℃, a signal is transmitted to the controller 11, and the controller 11 controls the electromagnetic valve 9 to be closed; the converted mixed gas enters a second heat exchanger 2 for heat exchange and cooling, the mixed gas is cooled to 455 ℃, the gas enters a second layer converter 5 for second conversion, the temperature of the converted mixed gas is increased to 596 ℃, the gas enters a third heat exchanger 3 for heat exchange and cooling, the cooled gas is cooled to 455 ℃, the gas enters a three-layer converter 5 for third conversion, the temperature of the converted mixed gas is increased to 566 ℃, the gas enters a first heat exchanger 1 for heat exchange and cooling, the cooled gas is cooled to 260 ℃, the gas enters an intermediate absorption tower 6 for sulfur trioxide absorption to prepare acid, sulfur dioxide gas is discharged, the sulfur dioxide gas sequentially enters a fourth heat exchanger 4 and a third heat exchanger 3 for heat exchange and heating, sulfur dioxide flue gas is preheated to 435 ℃, the gas continues to enter the fourth layer converter 5 for fourth conversion, the temperature of the converted mixed gas is increased to 559 ℃, the gas enters the fourth heat exchanger 4 for heat exchange and cooling, the mixed gas is cooled to 230 ℃, the gas enters a final absorption tower 7 for sulfur trioxide absorption to prepare acid, and the tail gas is discharged to the atmosphere.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (5)
1. The sulfur dioxide converter is characterized by comprising a shell, a baffle plate, a catalyst layer, a gas distribution assembly, a temperature control pipeline, a cooling water inlet pipe and a cooling water drain pipe, wherein a plurality of baffle plates are arranged in the shell at intervals along the vertical direction, the shell is divided into a plurality of conversion sections by the plurality of baffle plates, the catalyst layer is arranged in each conversion section, and the gas distribution assembly is arranged above the catalyst layer of each conversion section in the shell; the catalyst layer of the topmost conversion section is internally provided with a temperature control pipeline, one end of the temperature control pipeline penetrates through the shell to be communicated with the cooling water inlet pipe, and the other end of the temperature control pipeline penetrates through the shell to be communicated with the cooling water drain pipe.
2. The sulfur dioxide converter of claim 1, wherein the gas distribution assembly comprises a gas distribution main pipe and gas distribution branch pipes, the gas distribution branch pipes are welded on two sides of the gas distribution main pipe in a staggered mode, and a plurality of gas distribution holes are formed in the gas distribution branch pipes.
3. A sulfur dioxide converter according to claim 1 or 2, wherein three baffles are arranged in the shell from top to bottom at intervals, and the three baffles divide the shell into a first conversion section, a second conversion section, a third conversion section and a fourth conversion section from top to bottom in sequence.
4. A conversion system comprising the sulphur dioxide converter according to any of claims 1-3, characterized in that it further comprises a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, an intermediate absorber column and a final absorber column;
The outlet of the blower is communicated with the first inlet of the first heat exchanger, the first outlet of the first heat exchanger is communicated with the first inlet of the second heat exchanger, the first outlet of the second heat exchanger is communicated with the flue gas inlet of the first conversion section of the converter, the flue gas outlet of the first conversion section of the converter is communicated with the second inlet of the second heat exchanger, the second outlet of the second heat exchanger is communicated with the flue gas inlet of the second conversion section of the converter, the flue gas outlet of the second conversion section of the converter is communicated with the first inlet of the third heat exchanger, the first outlet of the third heat exchanger is communicated with the flue gas inlet of the third conversion section of the converter, the flue gas outlet of the third conversion section of the converter is communicated with the second inlet of the first heat exchanger, and the second outlet of the first heat exchanger is communicated with the gas inlet of the intermediate absorption tower; the gas outlet of the intermediate absorption tower is communicated with the first inlet of the fourth heat exchanger, the first outlet of the fourth heat exchanger is communicated with the second inlet of the third heat exchanger, the second outlet of the third heat exchanger is communicated with the flue gas inlet of the fourth conversion section of the converter, the flue gas outlet of the fourth conversion section of the converter is communicated with the second inlet of the fourth heat exchanger, and the second outlet of the fourth heat exchanger is communicated with the gas inlet of the final absorption tower.
5. The conversion system according to claim 4, wherein a temperature sensor is provided at the flue gas outlet of the first conversion section, an electromagnetic valve is provided on the cooling water inlet pipe of the converter, the temperature sensor is electrically connected to the input end of a controller, and the output end of the controller is electrically connected to the electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322453746.5U CN220861101U (en) | 2023-09-08 | 2023-09-08 | Sulfur dioxide converter and conversion system comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322453746.5U CN220861101U (en) | 2023-09-08 | 2023-09-08 | Sulfur dioxide converter and conversion system comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220861101U true CN220861101U (en) | 2024-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322453746.5U Active CN220861101U (en) | 2023-09-08 | 2023-09-08 | Sulfur dioxide converter and conversion system comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220861101U (en) |
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2023
- 2023-09-08 CN CN202322453746.5U patent/CN220861101U/en active Active
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