CN220969067U - Cooling device of sodium aluminate decomposer - Google Patents
Cooling device of sodium aluminate decomposer Download PDFInfo
- Publication number
- CN220969067U CN220969067U CN202322761291.3U CN202322761291U CN220969067U CN 220969067 U CN220969067 U CN 220969067U CN 202322761291 U CN202322761291 U CN 202322761291U CN 220969067 U CN220969067 U CN 220969067U
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- CN
- China
- Prior art keywords
- sodium aluminate
- decomposer
- heat exchanger
- pipe
- cooling device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 229910001388 sodium aluminate Inorganic materials 0.000 title claims abstract description 80
- 238000001816 cooling Methods 0.000 title claims description 18
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 21
- 239000000498 cooling water Substances 0.000 claims abstract description 7
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims abstract description 5
- 238000000354 decomposition reaction Methods 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000008676 import Effects 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 description 14
- 230000009467 reduction Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- ZJVKLBBPLUXEAC-UHFFFAOYSA-N Pipethanate hydrochloride Chemical compound [Cl-].C=1C=CC=CC=1C(C=1C=CC=CC=1)(O)C(=O)OCC[NH+]1CCCCC1 ZJVKLBBPLUXEAC-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model provides a heat sink of sodium aluminate decomposer, includes sodium aluminate decomposer, still includes heat exchanger, reducing gear, liquid level height is greater than or equal to 37m in the sodium aluminate decomposer, and the heat exchanger is located same installation face with the sodium aluminate decomposer, and the cooling water is circulated to the heat transfer medium passageway of heat exchanger, the process medium passageway import of heat exchanger passes through the reducing gear to be connected in the bottom of sodium aluminate decomposer, the reducing gear is serpentine crooked extension, is provided with the filter screen between reducing gear and the sodium aluminate decomposer, and the process medium passageway export of heat exchanger passes through back flow connection at the top of sodium aluminate decomposer, sets up the delivery pump on this back flow. The utility model has simple structure and low maintenance cost, and can effectively prolong the service life of the matched heat exchanger.
Description
Technical Field
The utility model relates to the field of chemical industry, in particular to a cooling device of a sodium aluminate decomposer.
Background
Alumina production enterprises use bauxite as a raw material, sodium aluminate solution after pulping, dissolving out, red mud separation and cooling is sent to a decomposing tank to gradually generate aluminum hydroxide slurry, and the aluminum hydroxide slurry is filtered and calcined to obtain an alumina product.
In the process of generating aluminum hydroxide slurry in the decomposing tank, the sodium aluminate solution needs to be subjected to heat exchange and cooling with a matched heat exchanger. At present, the bottom of the decomposing tank is provided with a circulating lower pipe which is connected with the top of the decomposing tank through a heat exchanger and a circulating upper pipe, and the circulating lower pipe is provided with a conveying pump. However, because the liquid level of the sodium aluminate solution in the decomposing tank can reach 37 meters, the flow rate of the sodium aluminate solution entering the heat exchanger is high due to the combined pump action, and carried particles impact the process medium channel of the heat exchanger, so that the maintenance period of the heat exchanger is long.
Therefore, how to design a cooling device of a sodium aluminate decomposer which can normally run for a long time is a problem to be solved by the technicians in the field.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a cooling device of a sodium aluminate decomposer, which has the advantages of simple structure and low maintenance cost, and can effectively prolong the service life of a matched heat exchanger.
The technical scheme of the utility model is as follows: the utility model provides a heat sink of sodium aluminate decomposer, includes sodium aluminate decomposer, still includes heat exchanger, reducing gear, liquid level height is greater than or equal to 37m in the sodium aluminate decomposer, and the heat exchanger is located same installation face with the sodium aluminate decomposer, and the cooling water is circulated to the heat transfer medium passageway of heat exchanger, the process medium passageway import of heat exchanger passes through the reducing gear to be connected in the bottom of sodium aluminate decomposer, the reducing gear is serpentine crooked extension, is provided with the filter screen between reducing gear and the sodium aluminate decomposer, and the process medium passageway export of heat exchanger passes through back flow connection at the top of sodium aluminate decomposer, sets up the delivery pump on this back flow.
The bottom of the sodium aluminate decomposer is provided with a discharge pipe, a first valve is arranged, and two ends of the deceleration pipe are respectively connected with the inlet of a process medium channel of the heat exchanger and the discharge pipe of the sodium aluminate decomposer through flange plates.
The filter screen is arranged in the middle of the flange plate between the speed reducing pipe and the discharging pipe.
The heat exchanger is a wide-channel plate heat exchanger.
A stable liquid tank is arranged between the heat exchanger and the delivery pump, and an inlet of the delivery pump is connected to the bottom of the stable liquid tank.
The downstream end of the return pipe is positioned above the liquid level of the sodium aluminate decomposition tank, and a second valve is arranged on the return pipe.
The technical scheme has the following beneficial effects:
1. The cooling device of the sodium aluminate decomposer comprises the sodium aluminate decomposer, a heat exchanger and a deceleration tube, wherein the heat exchanger is used for cooling sodium aluminate slurry in the sodium aluminate decomposer, the deceleration tube is used for decelerating the sodium aluminate slurry entering the heat exchanger, the impact strength of a sodium aluminate solution to the heat exchanger is reduced, and the cooling effect of the heat exchanger to the sodium aluminate slurry is improved. The liquid level height in the sodium aluminate decomposer is more than or equal to 37m, the heat exchanger and the sodium aluminate decomposer are positioned on the same installation surface, and sodium aluminate slurry in the decomposer can enter the heat exchanger through gravitational potential energy. The heat exchange medium channel of the heat exchanger circulates cooling water as a heat exchange medium to cool sodium aluminate slurry flowing through the process medium channel. The inlet of the process medium channel of the heat exchanger is connected to the bottom of the sodium aluminate decomposer through a reducing pipe, the reducing pipe is in serpentine bending extension, and the direction of sodium aluminate slurry entering the reducing pipe under the action of gravity is repeatedly changed, so that the flow speed of the sodium aluminate slurry is reduced. A filter screen is arranged between the reducing tube and the sodium aluminate decomposer, the sodium aluminate solution is filtered through the filter screen before entering the reducing tube, and large particle solid phases mixed in the sodium aluminate solution are trapped, so that impact and abrasion caused when the large particle solid phases pass through the process medium channels of the reducing tube and the heat exchanger are avoided, and the running period of the reducing tube and the heat exchanger is effectively prolonged. The outlet of the process medium channel of the heat exchanger is connected to the top of the sodium aluminate decomposer through a return pipe, a delivery pump is arranged on the return pipe, and sodium aluminate slurry subjected to heat exchange and temperature reduction in the heat exchanger is pumped back to the sodium aluminate decomposer through the return pipe, so that the production process requirement is met.
2. The bottom of the sodium aluminate decomposer is provided with a discharge pipe, and a first valve is arranged, two ends of the deceleration pipe are respectively connected with the inlet of a process medium channel of the heat exchanger and the discharge pipe of the sodium aluminate decomposer through flange plates, so that the design is convenient to install and disassemble the deceleration pipe, and the stop maintenance time of a production line is shortened.
3. The stable liquid tank is arranged between the heat exchanger and the delivery pump, the inlet of the delivery pump is connected to the bottom of the stable liquid tank, the flow speed of sodium aluminate slurry is low after passing through the speed reducing pipe and the process medium channel of the heat exchanger, and the sodium aluminate slurry is firstly collected in the stable liquid tank to form a certain liquid level height, so that the normal operation of the delivery pump is ensured.
Further description is provided below with reference to the drawings and detailed description.
Drawings
FIG. 1 is a schematic diagram of the connection of the present utility model.
In the attached drawings, 1 is a sodium aluminate decomposer, 2 is a heat exchanger, 3 is a reducing pipe, 4 is a filter screen, 5 is a return pipe, 6 is a conveying pump, 7 is a discharge pipe, 8 is a stable liquid tank, a is a first valve, and b is a second valve.
Detailed Description
Referring to fig. 1, a cooling device for a sodium aluminate decomposition tank is an embodiment. The cooling device of the sodium aluminate decomposer comprises a sodium aluminate decomposer 1, a heat exchanger 2 and a reducing pipe 3, wherein the liquid level height in the sodium aluminate decomposer is more than or equal to 37m, and the heat exchanger adopts a wide-channel plate type heat exchanger. The heat exchanger 2 and the sodium aluminate decomposer 1 are positioned on the same installation surface, and in general, the sodium aluminate decomposer and the heat exchanger are both installed on the ground. The heat exchange medium channel of the heat exchanger circulates cooling water. The inlet of the process medium channel of the heat exchanger 2 is connected to the bottom of the sodium aluminate decomposition tank 1 through a reduction tube 3, in this embodiment, a discharge tube 7 is disposed at the bottom of the sodium aluminate decomposition tank 1 and is provided with a first valve a, specifically, a flange is disposed at the extending end of the discharge tube, a flange is disposed at the upstream end of the reduction tube, a flange is disposed at the inlet of the process medium channel of the heat exchanger, the discharge tube is fixedly connected with the upstream end of the reduction tube through the flange, and the inlet of the process medium channel of the heat exchanger is fixedly connected with the downstream end of the reduction tube through the flange. The reducing tube 3 is in serpentine bending extension, a filter screen 4 is arranged between the reducing tube 3 and the sodium aluminate decomposition tank 1, obviously, the filter screen is designed in the middle of a flange plate between the reducing tube and the discharge tube, and the specification of the filter screen can be flexibly determined according to the actual conditions of enterprises. The outlet of the process medium channel of the heat exchanger is connected to the top of the sodium aluminate decomposer 1 through a return pipe 5, a delivery pump 6 is arranged on the return pipe 5, in the embodiment, a steady liquid tank 8 is arranged between the heat exchanger 2 and the delivery pump 6, the inlet of the delivery pump 6 is connected to the bottom of the steady liquid tank 8, the downstream end of the return pipe 5 is positioned above the liquid level of the sodium aluminate decomposer, and a second valve b is arranged on the return pipe.
The working principle of the utility model is as follows: and opening the first valve and the second valve, opening the delivery pump, and injecting circulating cooling water into the heat exchange medium channel of the heat exchanger. Under the action of gravity, the large-particle solid-phase impurities in the sodium aluminate slurry in the sodium aluminate decomposer are separated from the discharge pipe at the bottom through the filter screen, enter the deceleration pipe for deceleration, enter the process medium channel of the heat exchanger, fully exchange heat with circulating cooling water for cooling, enter the stable liquid tank, and are pumped back to the top of the sodium aluminate decomposer by the delivery pump.
Claims (6)
1. The utility model provides a heat sink in sodium aluminate decomposer, includes sodium aluminate decomposer (1), its characterized in that: the heat exchanger also comprises a heat exchanger (2) and a reducing pipe (3), the liquid level height in the sodium aluminate decomposer is more than or equal to 37m, the heat exchanger (2) and the sodium aluminate decomposer (1) are positioned on the same mounting surface, a heat exchange medium channel of the heat exchanger circulates cooling water,
The process medium channel inlet of the heat exchanger (2) is connected to the bottom of the sodium aluminate decomposer (1) through a reducing pipe (3), the reducing pipe (3) is in serpentine bending extension, a filter screen (4) is arranged between the reducing pipe (3) and the sodium aluminate decomposer (1), the process medium channel outlet of the heat exchanger is connected to the top of the sodium aluminate decomposer (1) through a return pipe (5), and a delivery pump (6) is arranged on the return pipe (5).
2. The cooling device for sodium aluminate decomposer according to claim 1, wherein: the bottom of the sodium aluminate decomposer (1) is provided with a discharge pipe (7) and is provided with a first valve (a), and two ends of the deceleration pipe (3) are respectively connected with a process medium channel inlet of the heat exchanger and the discharge pipe of the sodium aluminate decomposer through flange plates.
3. The cooling device of the sodium aluminate decomposition tank according to claim 2, wherein: the filter screen (4) is arranged in the middle of the flange plate between the speed reducing pipe and the discharging pipe.
4. The cooling device for sodium aluminate decomposer according to claim 1, wherein: the heat exchanger (2) is a wide-channel plate heat exchanger.
5. The cooling device for sodium aluminate decomposer according to claim 1, wherein: a stable liquid tank (8) is arranged between the heat exchanger (2) and the delivery pump (6), and an inlet of the delivery pump (6) is connected to the bottom of the stable liquid tank (8).
6. The cooling device for sodium aluminate decomposer according to claim 1, wherein: the downstream end of the return pipe (5) is positioned above the liquid level of the sodium aluminate decomposition tank, and a second valve b is arranged on the return pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322761291.3U CN220969067U (en) | 2023-10-13 | 2023-10-13 | Cooling device of sodium aluminate decomposer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322761291.3U CN220969067U (en) | 2023-10-13 | 2023-10-13 | Cooling device of sodium aluminate decomposer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220969067U true CN220969067U (en) | 2024-05-17 |
Family
ID=91058191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322761291.3U Active CN220969067U (en) | 2023-10-13 | 2023-10-13 | Cooling device of sodium aluminate decomposer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220969067U (en) |
-
2023
- 2023-10-13 CN CN202322761291.3U patent/CN220969067U/en active Active
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