CN114084873B - L-shaped tower trough for sulfuric acid production - Google Patents
L-shaped tower trough for sulfuric acid production Download PDFInfo
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- CN114084873B CN114084873B CN202111445707.XA CN202111445707A CN114084873B CN 114084873 B CN114084873 B CN 114084873B CN 202111445707 A CN202111445707 A CN 202111445707A CN 114084873 B CN114084873 B CN 114084873B
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- layer
- absorption tower
- sulfuric acid
- arch
- supporting
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000010521 absorption reaction Methods 0.000 claims abstract description 69
- 230000008093 supporting effect Effects 0.000 claims abstract description 38
- 238000012856 packing Methods 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 239000002253 acid Substances 0.000 claims abstract description 17
- 239000000919 ceramic Substances 0.000 claims description 8
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 235000011149 sulphuric acid Nutrition 0.000 claims description 2
- 239000001117 sulphuric acid Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000002912 waste gas Substances 0.000 abstract description 18
- 239000007789 gas Substances 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses an L-shaped tower trough for sulfuric acid production, and belongs to the field of sulfuric acid production. The absorption tower is a cylindrical barrel body and is provided with a packing layer and a supporting arch; the supporting arch comprises an arch body and an inner cavity, the inner cavity is provided with a supporting layer, a guide layer and a first grid layer according to the flowing direction of waste gas, the bottom in the supporting layer is in a spherical arch shape, the supporting layer is provided with a plurality of self-locking units along the circumferential direction, two adjacent self-locking units are welded and connected, and the self-locking units are fixedly connected with the arch body; the guide layer comprises a fixing ring and a guide block, the guide block is symmetrical about the axis of the absorption tower, the fixing ring is fixedly connected with the arch body, and the fixing ring is rotatably connected with the guide block. The self-locking unit is used for reducing the weight of the supporting arch, the installation is convenient, the gas-liquid contact can be further promoted, and meanwhile, the guide block is used for guiding, so that the gas can be more uniform when entering the packing layer, and the absorption of waste gas and the quality of acid can be improved.
Description
Technical Field
The invention relates to the field of sulfuric acid production, in particular to an L-shaped tower trough for sulfuric acid production.
Background
In the process of utilizing coking waste gas, a dry-method acid making process is adopted to produce sulfuric acid, so that the recycling of sulfur resources and the harmless treatment of desulfurization waste liquid can be efficiently improved, and the currently commonly used equipment is an absorption tower and a circulating tank. Utilize the tower groove to make the in-process of sulphuric acid, the tower body is usually cylindrical, the liquid that sprays that comes out by the distributor flows down along the packing layer, waste gas that comes in by lower part air inlet flows up along the packing layer, the packing layer bottom needs to be supported, but present support overweight, can produce inconvenience when installing in the tower, and the function is single, if can make the support subtract heavy under the condition that does not reduce the bearing capacity, artificial going to control the gaseous flow direction of waste gas at the supporting part before waste gas gets into the packing layer simultaneously, just so can the two-phase abundant even contact of gas-liquid, improve the absorption utilization effect of waste gas, thereby improve the output of acid.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an L-shaped tower tank for sulfuric acid production, which achieves the effect of improving the full contact of gas and liquid phases by improving the flowing direction of gas so as to improve the treatment efficiency of waste gas and further improve the yield and quality of acid.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an L-shaped tower trough for sulfuric acid production, which comprises an absorption tower and a circulating trough, wherein the absorption tower is communicated with the bottom of the circulating trough, the absorption tower is a cylindrical barrel, the absorption tower is sequentially provided with a distributor, a packing layer, a liquid redistribution device and a support arch according to the flow direction of absorption liquid, the support arch comprises an arch body and an inner cavity, the inner cavity is provided with a support layer, a guide layer and a first grid layer according to the flow direction of waste gas, the bottom of the support layer is in a spherical arch shape, the support layer is provided with a disc, the disc is rotatably connected with the inner cavity, and the disc is provided with a first through hole; a plurality of self-locking units are arranged between the disc and the guide layer along the circumferential direction, two adjacent self-locking units are welded and connected, and the self-locking units are fixedly connected with the disc; the guide layer comprises a fixed ring and a guide block, the guide block is symmetrical about the axis of the absorption tower, the fixed ring is fixedly connected with the arch body, and the fixed ring is rotatably connected with the guide block.
The invention has the preferable technical scheme that the self-locking unit comprises a supporting sheet and a bearing sheet, the cross section of the self-locking unit is A-shaped to form a self-locking structure, and the structural strength is ensured; one end of the bearing sheet is fixedly connected with the disc, the other end of the bearing sheet is abutted against the arch body, and the bearing sheet and the supporting sheet are provided with second through holes. Thus, the solid structure of the support arch is avoided, and the structural strength is ensured.
The invention has the preferable technical scheme that a second grating layer is arranged between the supporting layer and the guide layer and is abutted against the end surface of the bearing sheet.
The invention has the preferable technical scheme that a supporting structure is arranged between the disc and the bottom of the supporting layer, the supporting structure is fixedly connected with the arch body, and the top end face of the supporting structure is abutted against the disc.
The invention preferably adopts the technical scheme that the absorption tower further comprises a fixed table, wherein the fixed table is fixedly connected with the absorption tower, and a motor is arranged on the fixed table to drive the disc to rotate.
The invention has the preferable technical scheme that the distributor is arranged close to the top of the absorption tower, the packing layer is arranged between the distributor and the supporting arch and comprises two layers, the liquid redistribution device is arranged between the two layers of the packing layer, and the packing layer is uniformly laid pall rings.
The invention has the preferable technical scheme that an air outlet is arranged at the top of the absorption tower, and an air inlet is arranged on the side wall of the absorption tower close to the bottom.
The preferable technical scheme of the invention is that the absorption tower and the shell of the circulation tank are both made of carbon steel, acid-resistant tiles are paved on the inner wall of the circulation tank, and the acid-resistant tiles are paved on the side wall between the support arch and the bottom of the absorption tower; the bottom of the absorption tower is provided with an acid-proof ceramic tile with a gradient towards the circulation tank, and a sulfuric acid inlet is arranged at the joint of the bottom of the absorption tower and the circulation tank so as to ensure that sulfuric acid can flow into the circulation tank for storage.
The invention has the preferable technical scheme that a first manhole is further arranged on the side wall between the distributor and the top of the absorption tower, and a second manhole is arranged at the top of the circulating groove, so that the maintenance of personnel is facilitated.
The invention has the preferable technical scheme that a circulating pump mounting port and an acid mixing port are further arranged at the top of the circulating groove, an exhaust port is arranged at one end of the circulating groove, which is far away from the absorption tower, and a sewage discharge port is arranged at the bottom of the circulating groove.
The invention has the beneficial effects that:
(1) According to the L-shaped tower trough for sulfuric acid production, provided by the invention, the self-locking unit is arranged, so that on the premise of ensuring the structural strength of the supporting sheet, the self weight of the supporting arch is reduced, the installation is more convenient, and meanwhile, liquid flowing down from the packing layer flows down along the self-locking unit, namely a layer of packing is arranged in the supporting arch, so that the absorption effect of waste gas is further improved, and the yield of acid is improved;
(2) The gas guide layer is arranged in the support arch, and when waste gas passes through the gas guide layer, the waste gas is sprayed out from the through holes of the receiving sheet and then can impact the guide block to rotate, so that the gas flowing to the packing layer from the waste gas is more uniform, the gas-liquid contact effect in the packing layer can be better ensured, the production quality of sulfuric acid is improved, and meanwhile, the guide block can swing and is favorable for liquid to flow down.
Drawings
FIG. 1 is a schematic diagram of an L-shaped tower tank for sulfuric acid production according to the present invention;
FIG. 2 is a schematic structural view of a support arch of the present invention;
FIG. 3 is a top view of a support arch of the present invention;
in the figure:
1. an absorption tower; 2. a circulation tank; 3. a fixed table; 11. a distributor; 12. a packing layer; 13. a sulfuric acid inlet; 14. a liquid redistribution device; 15. a support arch; 16. an air inlet; 17. an air outlet; 18. acid-resistant ceramic tiles; 19. a first manhole; 150. an arch body; 151. an inner cavity; 152. a support layer; 153. a guide layer; 154. a first grid layer; 1520. a disc; 1521. a self-locking unit; 1531. a stationary ring; 1532. a guide block; 1522. a support sheet; 1523. a receiving sheet; 1524. a first through hole; 1525. a second through hole; 155. a second grid layer; 31. a motor; 21. a second manhole; 22. a circulating pump mounting port; 23. a cross acid port; 24. an exhaust port; 25. a sewage draining outlet; 156. a support structure.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1 to 3, the present embodiment provides an L-shaped tower tank for sulfuric acid production, which includes an absorption tower 1 and a circulation tank 2, the absorption tower 1 is communicated with the bottom of the circulation tank 2, the absorption tower 1 is a cylindrical barrel, the absorption tower 1 is provided with a distributor 11, a packing layer 12, a liquid redistribution device 14 and a support arch 15 in sequence according to the flow direction of absorption liquid, the support arch 15 includes an arch body 150 and an inner cavity 151, the inner cavity 151 is provided with a support layer 152, a guide layer 153 and a first grid layer 154 according to the flow direction of waste gas, the bottom of the support layer 152 is in a spherical arch shape, the support layer 152 is provided with a disc 1520, the disc 1520 is rotatably connected with the inner cavity 151, and the disc 1520 is provided with a first through hole 1524; a plurality of self-locking units 1521 are arranged between the disc 1520 and the guide layer 153 along the circumferential direction, two adjacent self-locking units 1521 are connected in a welding manner, and the self-locking units 1521 are fixedly connected with the disc 1520; the guide layer 153 includes a fixing ring 1531 and a guide block 1532, the guide block 1532 is symmetrical with respect to the axis of the absorption tower 1, the fixing ring 1531 is fixedly connected to the arch 150, and the fixing ring 1531 is rotatably connected to the guide block 1532. With absorption tower 1 and circulation tank 2 bottom intercommunication, avoided utilizing other pipelines to connect and the extravagant problem in space that causes, make the equipment wholeness of whole production stronger moreover. The supporting arch 15 in the absorption tower 1 needs to support the packing layer 12, and when the packing layer 12 is provided with a plurality of layers, the packing layer has a better absorption effect on sulfur-containing waste gas, so that the whole supporting arch 15 is lighter and has enough strength on the premise of not reducing the supporting effect by arranging the self-locking unit 1521; through setting up guide block 1532, can be so that waste gas dashes out the back through the through-hole of accepting piece 1523, can be so that gaseous even packing layer 12 that passes through to improve the absorptive efficiency of gas-liquid two-phase.
In order to reduce the weight of the support arch 15 without reducing the bearing capacity, preferably, the self-locking unit 1521 includes a support sheet 1522 and a receiving sheet 1523, and the cross section of the self-locking unit 1521 is a type to form a self-locking structure, so as to ensure the structural strength; one end of the receiving piece 1523 is fixedly connected with the disc 1520, the other end of the receiving piece 1523 abuts against the arch body 150, and the receiving piece 1523 and the supporting piece 1522 are provided with second through holes 1525. For similar truss class structure, support piece 1522 and accept piece 1523 and be certain angle fixed connection, form the auto-lock, structural strength is higher relatively, and liquid can flow down along support piece 1522 and accept piece 1523 simultaneously, has increased a layer of filler again equivalently for there is better absorption effect to the sulphur flue gas.
In order to achieve a better supporting effect, preferably, a second grid layer 155 is arranged between the supporting layer 152 and the guiding layer 153, the second grid layer 155 abuts against the end face of the receiving piece 1523, a supporting structure 156 is arranged between the disc 1520 and the bottom of the supporting layer 152, the supporting structure 156 is fixedly connected with the arch body 150, and the end face of the top of the supporting structure 156 abuts against the disc 1520. The weight of the filler layer can be more uniformly distributed to the self-locking units 1521 through the second grid layer 155.
In order to achieve the purpose of driving the guide block 1532 in the absorption tower 1 from the outside, it is preferable that the absorption tower further includes a fixing table 3, the fixing table 3 is fixedly connected to the absorption tower 1, and the fixing table 3 is provided with a motor 31 for driving the disc 1520 to rotate.
Preferably, the distributor 11 is arranged near the top of the absorption column 1, the packing layer 12 is arranged between the distributor 11 and the support arch 15, the packing layer 12 comprises two layers, the liquid redistribution device 14 is arranged between the two layers of the packing layer 12, and the packing layer 12 is an evenly-laid pall ring. The absorption liquid is sprayed out from the distributor 11 and flows down to the side wall of the absorption tower 1 in the process of passing through the filler layer 12, so the absorption liquid is collected again by the liquid redistribution device 14 and then continuously sprayed, and a better waste gas absorption effect is achieved.
In order to make the waste gas pass through the absorption tower better, preferably, the top of the absorption tower 1 is provided with an air outlet 17, and the side wall of the absorption tower 1 close to the bottom is provided with an air inlet 16.
In order to prevent the absorption tower 1 and the circulation tank 2 from being corroded and ensure that the sulfuric acid prepared by the absorption tower 1 can flow into the circulation tank 2, preferably, the shells of the absorption tower 1 and the circulation tank 2 are made of carbon steel, acid-resistant ceramic tiles 18 are laid on the inner wall of the circulation tank 2, and the acid-resistant ceramic tiles 18 are laid on the side wall between the support arch 15 and the bottom of the absorption tower 1; the acid-proof ceramic tile 18 at the bottom of the absorption tower 1 has a gradient towards the circulating tank 2, and a sulfuric acid inlet 13 is arranged at the connection part of the bottom of the absorption tower 1 and the circulating tank 2 so as to ensure that sulfuric acid can flow into the circulating tank 2 for storage.
Preferably, a first manhole 19 is further arranged on the side wall between the distributor 11 and the top of the absorption tower 1, and a second manhole 21 is arranged at the top of the circulation tank 2 to facilitate the overhaul of personnel.
Preferably, the top of the circulation tank 2 is further provided with a circulation pump mounting port 22 and an acid mixing port 23, one end of the circulation tank 2, which is far away from the absorption tower 1, is provided with an exhaust port 24, and the bottom of the circulation tank 2 is provided with a sewage discharge port 25.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not intended to be limited to the particular embodiments disclosed herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The utility model provides a L type tower groove for sulphuric acid production, includes absorption tower (1) and circulation groove (2), absorption tower (1) with circulation groove (2) bottom intercommunication, absorption tower (1) is cylindrical barrel, absorption tower (1) has set gradually distributor (11), packing layer (12), liquid redistribution device (14) and support according to absorption liquid flow direction and has encircleed (15), its characterized in that:
the supporting arch (15) comprises an arch body (150) and an inner cavity (151), a supporting layer (152), a guide layer (153) and a first grid layer (154) are arranged in the inner cavity (151) according to the flowing direction of exhaust gas, the bottom of the supporting layer (152) is in a spherical arch shape, a disc (1520) is arranged on the supporting layer (152), the disc (1520) is rotatably connected with the inner cavity (151), and a first through hole (1524) is formed in the disc (1520);
a plurality of self-locking units (1521) are arranged between the disc (1520) and the guide layer (153) along the circumferential direction, two adjacent self-locking units (1521) are connected in a welding manner, and the self-locking units (1521) are fixedly connected with the disc (1520);
the guide layer (153) comprises a fixed ring (1531) and a guide block (1532), the guide block (1532) is symmetrical about the axis of the absorption tower (1), the fixed ring (1531) is fixedly connected with the arch body (150), and the fixed ring (1531) is rotatably connected with the guide block (1532);
the self-locking unit (1521) comprises a support sheet (1522) and a bearing sheet (1523), the cross section of the self-locking unit (1521) is of an A type, so that a self-locking structure is formed, and the structural strength is guaranteed;
one end of the bearing sheet (1523) is fixedly connected with the disc (1520), the other end of the bearing sheet is abutted to the arch body (150), and the bearing sheet (1523) and the bearing sheet (1522) are provided with second through holes (1525).
2. The L-shaped tower cell for sulfuric acid production according to claim 1, characterized in that:
a second grid layer (155) is arranged between the supporting layer (152) and the guide layer (153), and the second grid layer (155) is abutted to the end face of the bearing sheet (1523).
3. The L-shaped tower cell for sulfuric acid production according to claim 1, wherein:
a supporting structure (156) is arranged between the disc (1520) and the bottom of the supporting layer (152), the supporting structure (156) is fixedly connected with the arch body (150), and the top end face of the supporting structure (156) is abutted against the disc (1520).
4. The L-shaped tower cell for sulfuric acid production according to claim 1, characterized in that:
still include fixed station (3), fixed station (3) with absorption tower (1) fixed connection, be provided with motor (31) on fixed station (3) to the drive disc (1520) rotates.
5. The L-shaped tower cell for sulfuric acid production according to claim 1, wherein:
distributor (11) are close absorption tower (1) top sets up, packing layer (12) set up in distributor (11) with support between encircleing (15), packing layer (12) are including two-layer, and liquid redistribution device (14) set up in two-layerly between packing layer (12), packing layer (12) are the pall ring of evenly laying.
6. The L-shaped tower cell for sulfuric acid production according to claim 1, characterized in that:
the absorption tower (1) top is provided with gas outlet (17), absorption tower (1) is close the bottom lateral wall and is provided with air inlet (16).
7. The L-shaped tower cell for sulfuric acid production according to claim 1, characterized in that:
the shells of the absorption tower (1) and the circulating tank (2) are made of carbon steel, acid-resistant ceramic tiles (18) are paved on the inner wall of the circulating tank (2), and the acid-resistant ceramic tiles (18) are paved on the side wall between the supporting arch (15) and the bottom of the absorption tower (1);
acid-resistant ceramic tiles (18) at the bottom of the absorption tower (1) have a gradient towards the circulation tank (2), and a sulfuric acid inlet (13) is arranged at the joint of the bottom of the absorption tower (1) and the circulation tank (2) so as to ensure that sulfuric acid can flow into the circulation tank (2) for storage.
8. The L-shaped tower cell for sulfuric acid production according to claim 1, wherein:
the distributor (11) with still be provided with first manhole (19) on the lateral wall between absorption tower (1) top, circulation groove (2) top is provided with second manhole (21) to make things convenient for personnel to overhaul.
9. The L-shaped tower cell for sulfuric acid production according to claim 1, wherein:
circulating pump installing port (22) and acid mixing port (23) still are provided with at circulating tank (2) top, circulating tank (2) are kept away from absorption tower (1) one end is provided with gas vent (24), circulating tank (2) bottom is provided with drain (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111445707.XA CN114084873B (en) | 2021-11-30 | 2021-11-30 | L-shaped tower trough for sulfuric acid production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111445707.XA CN114084873B (en) | 2021-11-30 | 2021-11-30 | L-shaped tower trough for sulfuric acid production |
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| Publication Number | Publication Date |
|---|---|
| CN114084873A CN114084873A (en) | 2022-02-25 |
| CN114084873B true CN114084873B (en) | 2022-12-16 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2246662A1 (en) * | 1998-09-18 | 2000-03-18 | Gordon M. Cameron | Ceramic tower packing support |
| US6174510B1 (en) * | 1999-08-27 | 2001-01-16 | Marcos D. Riano | Multi-pass cocurrent flow sulfuric acid tower process |
| CN2673850Y (en) * | 2003-12-29 | 2005-01-26 | 钮三明 | Stepped large open pore rate composite ball arch |
| CN2811260Y (en) * | 2005-07-26 | 2006-08-30 | 钮三明 | Dual spherical-shell shape composite ceramic arch with high percentage of open area |
| CN201406316Y (en) * | 2009-04-09 | 2010-02-17 | 淄博建龙化工有限公司 | Efficient, energy-saving and low-cost drying and absorbing device for producing sulfuric acid by using sulfur |
| CN204073829U (en) * | 2014-09-11 | 2015-01-07 | 江苏中兴化工设备有限公司 | With the stuffing washing tower of large opening rate packing support device |
| CN111535837A (en) * | 2020-05-09 | 2020-08-14 | 广东水电二局股份有限公司 | Hoist engine pull-type bow member erector with self-locking function |
-
2021
- 2021-11-30 CN CN202111445707.XA patent/CN114084873B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2246662A1 (en) * | 1998-09-18 | 2000-03-18 | Gordon M. Cameron | Ceramic tower packing support |
| US6174510B1 (en) * | 1999-08-27 | 2001-01-16 | Marcos D. Riano | Multi-pass cocurrent flow sulfuric acid tower process |
| CN2673850Y (en) * | 2003-12-29 | 2005-01-26 | 钮三明 | Stepped large open pore rate composite ball arch |
| CN2811260Y (en) * | 2005-07-26 | 2006-08-30 | 钮三明 | Dual spherical-shell shape composite ceramic arch with high percentage of open area |
| CN201406316Y (en) * | 2009-04-09 | 2010-02-17 | 淄博建龙化工有限公司 | Efficient, energy-saving and low-cost drying and absorbing device for producing sulfuric acid by using sulfur |
| CN204073829U (en) * | 2014-09-11 | 2015-01-07 | 江苏中兴化工设备有限公司 | With the stuffing washing tower of large opening rate packing support device |
| CN111535837A (en) * | 2020-05-09 | 2020-08-14 | 广东水电二局股份有限公司 | Hoist engine pull-type bow member erector with self-locking function |
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| CN114084873A (en) | 2022-02-25 |
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Denomination of invention: An L-shaped tower tank for sulfuric acid production Granted publication date: 20221216 Pledgee: Postal Savings Bank of China Co.,Ltd. Pingxiang Xiangdong District Sub branch Pledgor: PINGXIANG QUNXING CHEMICAL CERAMICS HEAD FACTORY Registration number: Y2024980023090 |
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