CN201907976U - Molten salt fusion device in alumina production - Google Patents
Molten salt fusion device in alumina production Download PDFInfo
- Publication number
- CN201907976U CN201907976U CN2010206537328U CN201020653732U CN201907976U CN 201907976 U CN201907976 U CN 201907976U CN 2010206537328 U CN2010206537328 U CN 2010206537328U CN 201020653732 U CN201020653732 U CN 201020653732U CN 201907976 U CN201907976 U CN 201907976U
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- steam
- fused salt
- molten salt
- valve
- storage tank
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Abstract
The utility model discloses a molten salt fusion device in the alumina production, which comprises a molten salt storage tank (13). An S-shaped tubular steam heater (6) is arranged in the molten salt storage tank (13). The steam heater (6) is fixed on a bracket (9) arranged in the molten salt storage tank (13). A steam inlet pipe of the steam heater (6) is provided with a steam inlet main valve (1) and a regulating valve (2). A steam exhaust pipe (11) and a molten salt circulating pump (12) are arranged on the molten salt storage tank (13). The steam exhaust pipe (11) is provided with a steam exhaust valve (10). The molten salt fusion device has the advantages that not only can the fusion requirement of molten salt be met, but also the system is simple, the existing facilities of an alumina plant can be sufficiently utilized, the equipment investment is reduced, the power supply capacity is reduced, the reliability is high, the service life is long and the molten salt fusion device is convenient to operate and manage and is simple to maintain.
Description
Technical field
The utility model relates to the fused salt melting appartus in a kind of alumina producing, belongs to the canalization stripping and produces melting salt heating field in the alumina system.
Background technology
Fused salt is the mixture that multiple nitrate is formed, and main component is: NaNO
2(40%), NaNO
3(7%), KNO
3(53%), fusing point: 142 ℃, boiling point: 680 ℃, the use temperature scope: 350～530 ℃, specific heat: 1.424kJ/kg ℃.
At present, in the system that adopts canalization dissolving-out process production aluminum oxide, fused salt is as high temperature heating medium, at canalization digester indirect heating ore pulp, carry out heat exchange with ore pulp, slurry temperature is raise, temperature of molten salt reduces, fused salt after the cooling is got back to the fused salt heating station, reheats in Salt heater, recycles.Because fused salt is solid under the normal temperature state, fusing point is 142 ℃, could be with being pumped into the Salt heater heating after must melting, in the prior art, the fused salt melting method that adopts is electrically heated usually, promptly in the fused salt storage tank electric heater is set, energising heating fused salt makes it reach melted state.Though this method can reach fused salt fusing purpose, and electric heater need be set, electric heater not only exists the big problem of investment, but also exists short, difficult in maintenance problem in work-ing life; In addition, because the power of electric heater is bigger, the special power distribution unit that supplies need be set also, this needs to increase bigger investment undoubtedly again.And after the fused salt fusing, promptly with being pumped into the molten salt furnace heating, the electric heating system that is disposed is stopped transport, and when ordinary production, the expensive electric heating system of this cover of configuration will be in idle state always, and this can cause the waste of resource undoubtedly.
Summary of the invention
The purpose of this utility model is: provide a kind of fused salt melting appartus of investing in the alumina producing little, simple in structure, that work-ing life is long, easy to maintenance, to overcome the deficiencies in the prior art.
The utility model is achieved in that the fused salt melting appartus in a kind of alumina producing of the present utility model, comprise the fused salt storage tank, in the fused salt storage tank, be provided with snakelike piped steam heater, steam heater is fixed on the support that is arranged in the fused salt storage tank, on the steam inlet pipe of steam heater, be provided with admission main valve and variable valve, steam discharge pipe and molten salt circulating pump are installed on the fused salt storage tank, on steam discharge pipe, are provided with vapor cock.
Two cover steam heaters are installed, and the admission end of every cover steam heater is communicated with respectively all by branch's admission valve with the variable valve of steam inlet pipe on above-mentioned support, on the afterbody pipeline of every cover steam heater, is provided with stopping valve and drain valve.
On above-mentioned steam inlet pipe, by-pass valve is installed, and by-pass valve is in parallel with variable valve.
On above-mentioned variable valve, also be connected with the Flow-rate adjustment control device.
Owing to adopted technique scheme, the utility model can effectively utilize the steam in the alumina producing system to heat fused salt, heating medium of the present utility model adopts steam, set up to the steam pipe system in stripping workshop by thermoelectric power station owing to existing, the fused salt heating station is adjacent with the stripping workshop, the fused salt storage tank is arranged in the fused salt heating station, therefore only needs just steam to be received the fused salt heating station with short pipeline, and investment is few; And when fused salt melted, other steam user was less with vapour, therefore can not influence the steam supply of existing production system, and boiler capacity meets the demands fully.Because about 260 ℃ of the vapor temperatures that is adopted, far above 142 ℃ of fused salt fusing points, it is no problem therefore to melt.The utility model adopts steam heating, has not only reduced facility investment, be convenient to operation and management, and operating maintenance is simple, and no spare parts starts flexibly.If adopt electrically heated, electric heater, electric control system need be set, increase the capacity of power supply-distribution system, investment strengthens; And fused salt fusing is not frequent thing, and system when restarting, just melts after stopping transport, and pitch time is longer, electric heater for a long time need not, have easily and break down, can not normal operation input.Therefore, compare with existing electric-heating technology, the utlity model has the advantage that not only can satisfy fused salt fusing, but also have system simple, can make full use of the existing facility of alumina producer, reduce facility investment, reduce power supply capacity, reliability height, long service life, be convenient to operation and management, advantage such as easy to maintenance.
Description of drawings
Fig. 1 is the structural representation of the utility model device;
Fig. 2 is the A-A sectional structure synoptic diagram of Fig. 1;
Description of reference numerals:
1-admission main valve, 2-variable valve, 3-by-pass valve, 4-Flow-rate adjustment control device, 5-branch admission valve, 6-steam heater, 7-stopping valve, 8-drain valve, 9-support, 10-vapor cock, 11-steam discharge pipe, 12-molten salt circulating pump, 13-fused salt storage tank, 14-fused salt.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment of the present utility model: when in existing canalization stripping production alumina system, carrying out the fused salt heating, adopt the fused salt melting appartus in a kind of alumina producing of the present utility model to implement, the structural representation of the utility model device as depicted in figs. 1 and 2, this device comprises fused salt storage tank 13, during making, in fused salt storage tank 13, install the steam heater 6 of snakelike tubular type, steam heater 6 is fixed on the support 9 that is arranged in the fused salt storage tank 13, on the steam inlet pipe of steam heater 6, install admission main valve 1 and variable valve 2, simultaneously on fused salt storage tank 13, install steam discharge pipe 11 and molten salt circulating pump 12, and on steam discharge pipe 11, a vapor cock 10 is installed; In order to use time control convenient, two cover steam heaters 6 can be installed on support 9, and the admission end of every cover steam heater 6 all is communicated with the variable valve 2 of steam inlet pipe by branch's admission valve 5 respectively, a stopping valve and a drain valve 8 are installed on the afterbody pipeline of every cover steam heater 6; When reality is used, can be according to the reserves of fused salt in the fused salt storage tank, and the fusing time of setting, calculate the heat that fusing needs with ordinary method, thereby determine that the area of every cover steam heater and steam-supply pipe size get final product; In order to keep in repair and to control conveniently, 1～2 by-pass valve 3 is installed on steam inlet pipe, and by-pass valve 3 is in parallel with variable valve 2; For convenience in automatic control, on variable valve 2, connect a cover and be used for Flow-rate adjustment control device 4 that regulating and controlling valve 2 opens and closes.This Flow-rate adjustment control device 4 can directly adopt the finished product device of selling on the market.
The method that fused salt melting appartus in a kind of alumina producing of the present utility model is adopted is that the solid fused salt under the normal temperature is sent in the fused salt storage tank, in the fused salt storage tank, be provided with steam heater, feeding pressure in steam heater is that 3MPa～4 MPa, temperature are 250 ℃～270 ℃ steam, can make heated fused salt reach the temperature more than 142 ℃ like this and melt, the pump for liquid salts after will melting is then sent into subsequent processing.
The principle of work of the utility model device is: when needs fusing fused salt 14, open admission main valve 1, steam enters by variable valve 2, enter steam heater 6 by branch's admission valve 5 again, steam and fused salt 14 carry out indirect heat exchange, steam discharges the latent heat of vaporization, becomes water of condensation, discharges by stopping valve 7 and drain valve 8; Fused salt 14 absorbs the latent heat of vaporization of steam, and temperature raises, and with the peripherad fused salt transmission of heat, the gas that produces in the heat-processed is by vapor cock 10 and steam discharge pipe 11 dischargings; When fused salt 14 temperature reach 142 ℃, i.e. fusing fully, Flow-rate adjustment control device 4 sends signal at this moment, closes variable valve 2 automatically, stops steam heating, can start molten salt circulating pump 12 then, and the fused salt 14 after the fusing is pumped to the Salt heater heating; Its variable valve 2 has the function that steam flow is regulated, and by-pass valve 3 is used for opening or cutting out steam inlet pipe when variable valve 2 is out of order.
Claims (4)
1. the fused salt melting appartus in the alumina producing, comprise fused salt storage tank (13), it is characterized in that: in fused salt storage tank (13), be provided with snakelike piped steam heater (6), steam heater (6) is fixed on the support (9) that is arranged in the fused salt storage tank (13), on the steam inlet pipe of steam heater (6), be provided with admission main valve (1) and variable valve (2), steam discharge pipe (11) and molten salt circulating pump (12) are installed on fused salt storage tank (13), on steam discharge pipe (11), are provided with vapor cock (10).
2. the fused salt melting appartus in the alumina producing according to claim 1, it is characterized in that: two cover steam heaters (6) are installed on support (9), and the admission end of every cover steam heater (6) all is communicated with the variable valve (2) of steam inlet pipe by branch's admission valve (5) respectively, is provided with stopping valve (7) and is provided with drain valve (8) on the afterbody pipeline of every cover steam heater (6).
3. the fused salt melting appartus in the alumina producing according to claim 1 is characterized in that: by-pass valve (3) is installed on steam inlet pipe, and by-pass valve (3) is in parallel with variable valve (2).
4. according to the fused salt melting appartus in claim 1 or the 3 described alumina producing, it is characterized in that: on variable valve (2), also be connected with Flow-rate adjustment control device (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206537328U CN201907976U (en) | 2010-12-13 | 2010-12-13 | Molten salt fusion device in alumina production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206537328U CN201907976U (en) | 2010-12-13 | 2010-12-13 | Molten salt fusion device in alumina production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201907976U true CN201907976U (en) | 2011-07-27 |
Family
ID=44300182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206537328U Expired - Lifetime CN201907976U (en) | 2010-12-13 | 2010-12-13 | Molten salt fusion device in alumina production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201907976U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557089A (en) * | 2010-12-13 | 2012-07-11 | 贵阳铝镁设计研究院有限公司 | Method and device for smelting molten salt during aluminum oxide production |
| CN107246546A (en) * | 2017-06-30 | 2017-10-13 | 江苏永钢集团有限公司 | A kind of blast furnace blower Lubricating oil heating device |
-
2010
- 2010-12-13 CN CN2010206537328U patent/CN201907976U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557089A (en) * | 2010-12-13 | 2012-07-11 | 贵阳铝镁设计研究院有限公司 | Method and device for smelting molten salt during aluminum oxide production |
| CN102557089B (en) * | 2010-12-13 | 2014-06-04 | 贵阳铝镁设计研究院有限公司 | Method and device for smelting molten salt during aluminum oxide production |
| CN107246546A (en) * | 2017-06-30 | 2017-10-13 | 江苏永钢集团有限公司 | A kind of blast furnace blower Lubricating oil heating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110727 Effective date of abandoning: 20140604 |
|
| RGAV | Abandon patent right to avoid regrant |