CN106145166A - A kind of alumina producing mesohigh dissolution heat integration Application way and device - Google Patents
A kind of alumina producing mesohigh dissolution heat integration Application way and device Download PDFInfo
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- CN106145166A CN106145166A CN201510126491.9A CN201510126491A CN106145166A CN 106145166 A CN106145166 A CN 106145166A CN 201510126491 A CN201510126491 A CN 201510126491A CN 106145166 A CN106145166 A CN 106145166A
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- ore pulp
- desiliconizing
- heat
- mineral slurry
- heat exchange
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Abstract
The open a kind of alumina producing mesohigh dissolution heat integration Application way of the present invention and device, by using dissolved mineral slurry final stage flash-pot exhaust steam and desiliconization ore pulp heat exchange, condensed water after initial steam heating dissolved mineral slurry preheats dissolved mineral slurry and desiliconization ore pulp successively, reduces flash tank end and dodges drop temperature and improve the heat utilization efficiency of initial steam.In heat integration Application way disclosed by the invention, water, steam flow journey are simple, heat utilization efficiency is high, small investment, heat the making full use of at digestion series of high steam can be realized, may insure that again live steam condensed water to return in higher-pressure deaerator and need not additionally it be heated, be the technique of the heat integration utilization of an applicable high temperature dissolution.
Description
Technical field
The present invention relates to a kind of field of aluminum oxide production, particularly relate in a kind of alumina producing high
Pressure solution goes out the method and device that heat integration utilizes.
Background technology
High pressure digestion is the core process in alumina producing.Existing high pressure digestion typically uses such as
Lower production technology: grind the ore pulp sent here (or sleeve pipe changes by pre-desiliconizing heating tank from raw ore slurry
Hot device) it is heated to stop desiliconization in desiliconization slot after desiliconization temperature, thermal source used is generally thermoelectricity
The low-pressure steam (0.6bar) that factory's low-pressure steam pipe network provides.Ore pulp after desiliconization passes through sleeve pipe again
Heat exchanger is heated to leaching temperature, and it is weary that thermal source used is followed successively by the flash distillations at different levels of ore pulp after dissolution
Vapour, the flash distillation exhaust steam (or live steam condensed water) of live steam condensed water, high pressure initial steam.
Live steam condensed water (230～240 DEG C) after preheating by expenditure and pressure produce low-pressure steam (～
0.6bar) being incorporated to low-pressure steam pipe network, after flash distillation, condensed water sends steam power plant back to.
This kind of method also exists following shortcoming: (1) needs to provide two kinds to high pressure dissolving out process
The steam of different parameters, adds the design difficulty of heat distribution pipe network；(2) live steam condensed water needs
Additionally to increase flashing apparatus, to add one-time investment；(3) due to fluctuation, newly steam
When the low-pressure steam that vapour condensed water flash goes out is incorporated to thermal depression pipe network, it is susceptible to pressure uneven
The phenomenon of weighing apparatus, impacts flashing apparatus and heat distribution pipe network；(4) sudden strain of a muscle exhaust steam in dissolution end is used for
Ore pulp after preheating pre-desiliconizing, heat transfer temperature difference is little, and to reducing, end sudden strain of a muscle ore pulp drop temperature is unfavorable,
Dilution trap is caused to steam seriously.
Summary of the invention
In order to solve above-mentioned technical barrier, make full use of the heat of initial steam, reduce dissolved mineral slurry
End dodge drop temperature, reduce dilution trap and steam, the invention provides a kind of brand-new dissolution heat
The method and device of amount comprehensive utilization, is possible not only to reduce dissolution end and dodges drop temperature, but also
The heat of initial steam can be made full use of.
For reaching above-mentioned purpose, the present invention is achieved in that
A kind of alumina producing mesohigh dissolution heat integration Application way, it is characterised in that: will
Raw ore slurry grinds the ore pulp sent here and utilizes the sudden strain of a muscle exhaust steam of dissolution end to be heated to 80～90 DEG C, recycling
Live steam condensed water is heated to 100～102 DEG C, is used for dissolution live steam condensed water successively adding
Dissolved mineral slurry after hot exhaust steam preheating and the pre-desiliconizing ore pulp after exhaust steam preheating.
Described dissolved mineral slurry is lowered the temperature through 10～12 grades of flash distillations, end dodge drop temperature be 115～
125℃。
It it is 280～300 DEG C with the live steam condensed water temperature of dissolved mineral slurry heat exchange.
It it is 220～250 DEG C with the live steam condensed water temperature of pre-desiliconizing ore pulp heat exchange.
With the live steam condensed water after dissolved mineral slurry heat exchange again with pre-desiliconizing ore pulp heat exchange, after heat exchange
The higher-pressure deaerator of condensed water direct backheat power plant.
The present invention further discloses a kind of alumina producing mesohigh dissolution heat integration to utilize
Device, including ore slurry pipeline, pre-desiliconizing ore pulp heat exchange device, desiliconization slot, membrane pump, dissolution ore deposit
Slurry heat exchanger, digester, flash-pot, exhaust steam pipeline, live steam condensed water pipeline；Ore pulp
Pipeline transfer ore pulp is to the first pre-desiliconizing ore pulp heat exchange device, the first pre-desiliconizing ore pulp heat exchange device and
Two pre-desiliconizing ore pulp heat exchange device series connection；Second pre-desiliconizing ore pulp heat exchange device connects desiliconization slot；Desiliconization
Ore pulp in groove delivers to chopped-off head dissolved mineral slurry heat exchanger with membrane pump after mixing with seed precipitation solution, first
Level dissolved mineral slurry heat exchanger is connected with many group dissolved mineral slurry heat exchangers；Final stage dissolved mineral slurry heat exchanger
With initial steam pipeline communication；Final stage dissolved mineral slurry heat exchanger and penultimate stage dissolved mineral slurry heat exchange
Device passes through live steam condensed water pipeline communication；Penultimate stage dissolved mineral slurry heat exchanger is steamed by new
Vapour condensing water conduit connects the second pre-desiliconizing ore pulp heat exchange device；Final stage dissolved mineral slurry heat exchanger is with molten
Go out device to connect；Digester connects many groups flash-pot of series connection；Chopped-off head flash-pot passes through exhaust steam
Pipeline connects chopped-off head dissolved mineral slurry heat exchanger；It is pre-de-that flash-pot connects first by exhaust steam pipeline
Silicon ore pulp heat exchange device.
Described pre-desiliconizing ore pulp heat exchange device is indirect heat exchanger.
Final stage flash-pot connects the first pre-desiliconizing ore pulp heat exchange device by exhaust steam pipeline.
For reaching different heating-up temperature, it is also possible to use last 3 grades of flash-pots to pass through exhaust steam
Pipeline connects the first pre-desiliconizing ore pulp heat exchange device.
Advantages of the present invention and effect are as follows:
Present invention mainly solves current domestic alumina producer end and dodge drop temperature height, digestion series
Heat utilization efficiency is low, and dilution trap steams serious problem.Use this technique, can make full use of new
The heat of steam, can reduce again dissolution end simultaneously and dodge drop temperature, reduce the steam of digestion series
Consume.
Accompanying drawing explanation
Fig. 1 is present invention process schematic diagram.
Detailed description of the invention
Enforcement to invention below combines accompanying drawing example and is described in detail in, but the protection model of the present invention
Enclose and do not limited by embodiment.
As it is shown in figure 1, the present invention includes ore slurry pipeline 1, pre-desiliconizing ore pulp heat exchange device 2, takes off
Silicon groove 3, membrane pump 4, dissolved mineral slurry heat exchanger 5, digester 6, flash-pot 7, exhaust steam
Pipeline 8, live steam condensed water pipeline 9；Ore slurry pipeline 1 transfer ore pulp is to the first pre-desiliconizing ore deposit
Slurry heat exchanger 2, the first pre-desiliconizing ore pulp heat exchange device 2 and the second pre-desiliconizing ore pulp heat exchange device 21
Series connection；Second pre-desiliconizing ore pulp heat exchange device 21 connects desiliconization slot 3；Ore pulp in desiliconization slot 3
Chopped-off head dissolved mineral slurry heat exchanger 5, chopped-off head dissolution is delivered to membrane pump 4 after mixing with seed precipitation solution
Ore pulp heat exchange device 5 is connected with many group dissolved mineral slurry heat exchangers；Final stage dissolved mineral slurry heat exchanger 5 with
Initial steam pipeline communication；Final stage dissolved mineral slurry heat exchanger 5 and penultimate stage dissolved mineral slurry heat exchange
Device 5 is connected by live steam condensed water pipeline 9；Penultimate stage dissolved mineral slurry heat exchanger 5 leads to
Cross live steam condensed water pipeline 9 and connect the second pre-desiliconizing ore pulp heat exchange device 21；Final stage dissolution ore deposit
Slurry heat exchanger 5 is connected with digester 6；Digester 6 connects many groups flash-pot 7 of series connection；
Chopped-off head flash-pot 7 connects chopped-off head dissolved mineral slurry heat exchanger 5 by exhaust steam pipeline 8；Spontaneous evaporation
Device 7 connects the first pre-desiliconizing ore pulp heat exchange device 2 by exhaust steam pipeline 8.
Described pre-desiliconizing ore pulp heat exchange device is indirect heat exchanger.
Final stage flash-pot 7 connects the first pre-desiliconizing ore pulp heat exchange device 2 by exhaust steam pipeline 8.
Below in conjunction with specific embodiment, the present invention will be further described.
Embodiment 1
The method and device that a kind of alumina producing mesohigh dissolution heat integration utilizes, flow process is such as
Under: carrying out ore grinding with seed precipitation solution after being mixed by diaspore ore, after ore grinding, temperature is 75.4
℃；Qualified ore pulp after grinding delivers to the heating of pre-desiliconizing double-tube heat exchanger.1st grade of pre-thermal sleeve
Outlet temperature is 80 DEG C, and thermal source used is the 11st grade of flash-pot flash distillation exhaust steam of dissolution, the
The outlet temperature of 2 grades of pre-thermal sleeves is 100 DEG C, and thermal source used is 220 DEG C of live steam condensed waters,
Condensate temperature after heat exchange is 158 DEG C.Ore pulp after desiliconization mix with seed precipitation solution after with every
Membrane pump is delivered to dissolving-out cannula heat exchanger and is heated to leaching temperature.Used by front 10 grades of double-tube heat exchangers
Thermal source is followed successively by the 10th grade of flash distillation exhaust steam to the 1st grade of flash-pot, and ore pulp is by 10 grades of exhaust steam
It is preheating to 215.4 DEG C；Thermal source used by 11st grade of double-tube heat exchanger is 280 DEG C of condensed waters, ore pulp
It is preheating to 221.4 DEG C by live steam condensed water；The initial steam bringing-up section thermal source of ore pulp is 285 DEG C
Saturated initial steam, is heated to 265 DEG C by dissolved mineral slurry.It is heated to the dissolved mineral slurry of leaching temperature
115 DEG C it are cooled to step by step through 11 grades of flash-pot flash distillations after digester stops dissolution.
Embodiment 2
The method and device that a kind of alumina producing mesohigh dissolution heat integration utilizes, flow process is such as
Under: carrying out ore grinding with seed precipitation solution after being mixed by diaspore ore, after ore grinding, temperature is 74
℃；Qualified ore pulp after grinding delivers to the heating of pre-desiliconizing double-tube heat exchanger.1st grade of pre-thermal sleeve
Outlet temperature is 90 DEG C, and thermal source used is that the 8th of dissolution the, 9,10 grades of flash-pot flash distillations are weary
Vapour, the outlet temperature of the 2nd grade of pre-thermal sleeve is 102 DEG C, and thermal source used is 250 DEG C of initial steams
Condensed water, the condensate temperature after heat exchange is 158 DEG C.Ore pulp after desiliconization mixes with seed precipitation solution
Deliver to dissolving-out cannula heat exchanger with membrane pump after conjunction and be heated to leaching temperature.Front 9 grades of sleeve heat exchanges
Thermal source used by device is followed successively by the 9th grade of flash distillation exhaust steam to the 1st grade of flash-pot, and ore pulp is by 9 grades
Exhaust steam is preheating to 205.8 DEG C；Thermal source used by 10th grade of double-tube heat exchanger is 290 DEG C of condensed waters,
Ore pulp is preheating to 212.8 DEG C by live steam condensed water；Initial steam bringing-up section thermal source is 280 DEG C and satisfies
And initial steam, dissolved mineral slurry is heated to 260 DEG C.The dissolved mineral slurry being heated to leaching temperature exists
Digester is cooled to 125 DEG C step by step through 10 grades of flash-pot flash distillations after stopping dissolution.
Embodiment 3
The method and device that a kind of alumina producing mesohigh dissolution heat integration utilizes, flow process is such as
Under: carrying out ore grinding with seed precipitation solution after being mixed by diaspore ore, after ore grinding, temperature is 74
℃；Qualified ore pulp after grinding delivers to the heating of pre-desiliconizing double-tube heat exchanger.1st grade of pre-thermal sleeve
Outlet temperature is 90 DEG C, and thermal source used is that the 8th of dissolution the, 9,10 grades of flash-pot flash distillations are weary
Vapour, the outlet temperature of the 2nd grade of pre-thermal sleeve is 102 DEG C, and thermal source used is 240 DEG C of initial steams
Condensed water, the condensate temperature after heat exchange is 158 DEG C.Ore pulp after desiliconization mixes with seed precipitation solution
Deliver to dissolving-out cannula heat exchanger with membrane pump after conjunction and be heated to leaching temperature.Front 9 grades of sleeve heat exchanges
Thermal source used by device is followed successively by the 9th grade of flash distillation exhaust steam to the 1st grade of flash-pot, and ore pulp is by 9 grades
Exhaust steam is preheating to 205.8 DEG C；Thermal source used by 10th grade of double-tube heat exchanger is 300 DEG C of condensed waters,
Ore pulp is preheating to 212.8 DEG C by live steam condensed water；Initial steam bringing-up section thermal source is 280 DEG C and satisfies
And initial steam, dissolved mineral slurry is heated to 260 DEG C.The dissolved mineral slurry being heated to leaching temperature exists
Digester is cooled to 120 DEG C step by step through 10 grades of flash-pot flash distillations after stopping dissolution.
Claims (9)
1. an alumina producing mesohigh dissolution heat integration Application way, it is characterised in that:
Raw ore slurry grinds the ore pulp sent here utilizes the sudden strain of a muscle exhaust steam of dissolution end to be heated to 80～90 DEG C, then profit
It is heated to 100～102 DEG C with live steam condensed water, dissolution live steam condensed water is used for successively
Dissolved mineral slurry after heating exhaust steam preheating and the pre-desiliconizing ore pulp after exhaust steam preheating.
High pressure digestion heat integration profit in alumina producing the most according to claim 1
By method, it is characterised in that: described dissolved mineral slurry is lowered the temperature through 10～12 grades of flash distillations, end
Dodging drop temperature is 115～125 DEG C.
High pressure digestion heat integration profit in alumina producing the most according to claim 1
By method, it is characterised in that: with the live steam condensed water temperature of dissolved mineral slurry heat exchange be 280～
300℃。
High pressure digestion heat integration profit in alumina producing the most according to claim 1
By method, it is characterised in that: with the live steam condensed water temperature of pre-desiliconizing ore pulp heat exchange be 220～
250℃。
High pressure digestion heat integration profit in alumina producing the most according to claim 1
By method, it is characterised in that: with the live steam condensed water after dissolved mineral slurry heat exchange again with pre-desiliconizing
Ore pulp heat exchange, the higher-pressure deaerator of the condensed water direct backheat power plant after heat exchange.
6. an alumina producing mesohigh dissolution heat integration utilizes device, it is characterised in that:
Including ore slurry pipeline (1), pre-desiliconizing ore pulp heat exchange device (2), desiliconization slot (3), membrane pump (4),
Dissolved mineral slurry heat exchanger (5), digester (6), flash-pot (7), exhaust steam pipeline (8),
Live steam condensed water pipeline (9)；Ore slurry pipeline (1) transfer ore pulp is to the first pre-desiliconizing ore pulp
Heat exchanger (2), the first pre-desiliconizing ore pulp heat exchange device (2) and the second pre-desiliconizing ore pulp heat exchange device
(21) series connection；Second pre-desiliconizing ore pulp heat exchange device (21) connects desiliconization slot (3)；Desiliconization slot
(3) ore pulp in is delivered to chopped-off head dissolved mineral slurry with membrane pump (4) after mixing with seed precipitation solution and is changed
Hot device (5), chopped-off head dissolved mineral slurry heat exchanger (5) is connected with many group dissolved mineral slurry heat exchangers；
Final stage dissolved mineral slurry heat exchanger (5) and initial steam pipeline communication；Final stage dissolved mineral slurry heat exchanger
(5) with penultimate stage dissolved mineral slurry heat exchanger (5) by live steam condensed water pipeline (9)
Connection；Penultimate stage dissolved mineral slurry heat exchanger (5) passes through live steam condensed water pipeline (9)
Connect the second pre-desiliconizing ore pulp heat exchange device (21)；Final stage dissolved mineral slurry heat exchanger (5) and dissolution
Device (6) connects；Digester (6) connects many groups flash-pot (7) of series connection；Chopped-off head is from steaming
Send out device (7) and connect chopped-off head dissolved mineral slurry heat exchanger (5) by exhaust steam pipeline (8)；Spontaneous evaporation
Device (7) connects the first pre-desiliconizing ore pulp heat exchange device (2) by exhaust steam pipeline (8).
High pressure digestion heat integration profit in alumina producing the most according to claim 6
With device, it is characterised in that: described pre-desiliconizing ore pulp heat exchange device is indirect heat exchanger.
High pressure digestion heat integration profit in alumina producing the most according to claim 6
With device, it is characterised in that: final stage flash-pot (7) connects the by exhaust steam pipeline (8)
One pre-desiliconizing ore pulp heat exchange device (2).
High pressure digestion heat integration profit in alumina producing the most according to claim 6
With device, it is characterised in that: last 3 grades of flash-pots (7) are by exhaust steam pipeline (8) even
Connect the first pre-desiliconizing ore pulp heat exchange device (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510126491.9A CN106145166B (en) | 2015-03-23 | 2015-03-23 | A kind of alumina producing mesohigh dissolution heat integration Application way and device |
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| CN201510126491.9A CN106145166B (en) | 2015-03-23 | 2015-03-23 | A kind of alumina producing mesohigh dissolution heat integration Application way and device |
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| CN106145166A true CN106145166A (en) | 2016-11-23 |
| CN106145166B CN106145166B (en) | 2018-01-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107915244A (en) * | 2018-01-02 | 2018-04-17 | 东北大学设计研究院（有限公司） | A kind of process unit and method of gibbsitic bauxite twin driving |
| CN110817915A (en) * | 2019-11-25 | 2020-02-21 | 沈阳铝镁设计研究院有限公司 | Method and device for reducing steam consumption in alumina production |
| CN112537790A (en) * | 2020-12-15 | 2021-03-23 | 山东南山铝业股份有限公司 | Bayer process high-low temperature combined digestion unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5545809A (en) * | 1978-09-20 | 1980-03-31 | Denki Kagaku Kogyo Kk | Production of alumina fiber |
| US6555076B1 (en) * | 1998-10-01 | 2003-04-29 | Gea Kestner | Bauxite ore digestion in the bayer process |
| CN1597524A (en) * | 2004-07-23 | 2005-03-23 | 山东铝业股份有限公司 | Bauxite low temperature continuous dissolving out technology |
-
2015
- 2015-03-23 CN CN201510126491.9A patent/CN106145166B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5545809A (en) * | 1978-09-20 | 1980-03-31 | Denki Kagaku Kogyo Kk | Production of alumina fiber |
| US6555076B1 (en) * | 1998-10-01 | 2003-04-29 | Gea Kestner | Bauxite ore digestion in the bayer process |
| CN1597524A (en) * | 2004-07-23 | 2005-03-23 | 山东铝业股份有限公司 | Bauxite low temperature continuous dissolving out technology |
Non-Patent Citations (1)
| Title |
|---|
| 唐时健: "管道化溶出设计探讨", 《轻金属》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107915244A (en) * | 2018-01-02 | 2018-04-17 | 东北大学设计研究院（有限公司） | A kind of process unit and method of gibbsitic bauxite twin driving |
| CN110817915A (en) * | 2019-11-25 | 2020-02-21 | 沈阳铝镁设计研究院有限公司 | Method and device for reducing steam consumption in alumina production |
| CN112537790A (en) * | 2020-12-15 | 2021-03-23 | 山东南山铝业股份有限公司 | Bayer process high-low temperature combined digestion unit |
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| CN106145166B (en) | 2018-01-12 |
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