CN107754363A - A kind of method that raising system evaporation volume reduces the steam consumption - Google Patents
A kind of method that raising system evaporation volume reduces the steam consumption Download PDFInfo
- Publication number
- CN107754363A CN107754363A CN201610701228.2A CN201610701228A CN107754363A CN 107754363 A CN107754363 A CN 107754363A CN 201610701228 A CN201610701228 A CN 201610701228A CN 107754363 A CN107754363 A CN 107754363A
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- Prior art keywords
- alkali lye
- steam
- flash
- pipeline
- evaporator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/26—Multiple-effect evaporating
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The present invention relates to a kind of method that aluminum oxide technology field reduces the steam consumption, more particularly to a kind of method that raising system evaporation volume reduces the steam consumption, increases the flash distillation series of high-temperature condensation water, flash distillation exhaust steam is for heating evaporation device group first evaporator discharging alkali lye.Advantages of the present invention effect：The present invention is flashed using a high-temperature condensation water is increased, its exhaust steam is used to heat first evaporator discharging alkali lye, the exhaust steam that alkali lye after heating flashes off still is used for heating evaporation device group first evaporator, so, total quantity of steam for heating first evaporator is constant, but the alkali lye evaporation volume in system is added, its evaporation volume is equal to the steam amount of alkali lye flash vessel.In the case that if system evaporation volume keeps constant, consumed equivalent to the steaming steam for reducing alkali lye flash vessel steam amount equivalent, improve efficiency of utilization, reduce the steam consumption of production system, can further reduce production cost.
Description
Technical field
The present invention relates to a kind of method that aluminum oxide technology field reduces the steam consumption, more particularly to a kind of raising system evaporation volume
The method for reducing the steam consumption.
Background technology
In aluminum oxide production process, high temperature dissolving-out process processing bauxite under the conditions of high-alkalinity is typically employed in（Contain
One hydraulic aluminium ore stone ore and boehmite ore deposit）, thermal source comes from the high temperature initial steam of high-pressure boiler output.Between initial steam passes through
Synthermal high-temperature condensation water is condensed into after connecing heat exchanger heating ore pulp（Higher than 200 degree）, then through being flashed to about 158 DEG C,
0.6MPa saturated vapor is used for heating evaporation, desiliconization and production wash water etc..This cooling method causes falling temperature gradient excessive, heat
Amount utilizes less efficient.
The content of the invention
The method for reducing the steam consumption for a kind of raising system evaporation volume provided by the invention that solves the above problems, it is therefore an objective to will
High-temperature condensation water increases a condensed water flash between existing falling temperature gradient, and its exhaust steam is used to steam by increasing heat exchanger heating
The first effect discharging mother liquor of hair, the mother liquor after heating by flash vessel flash distillation, the exhaust steam after flash distillation be used further to heating evaporation, desiliconization or its
The media such as wash water.Efficiency of utilization is improved, reduces the steam consumption of production system, reduces production cost.
The method that a kind of raising system evaporation volume of the invention reduces the steam consumption for the above-mentioned purpose, increases the sudden strain of a muscle of high-temperature condensation water
Series is steamed, flash distillation exhaust steam is used for heating evaporation device group first evaporator discharging alkali lye.
Flash distillation series is two-stage, after the initial steam of high pressure dissolving out process is by high temperature dissolution initial steam heater indirectly heat
Condensed water is flashed into one-level condensed water flash tank, and condensed water enters B-grade condensation water flash tank, two level after primary flash
Condensed water is incorporated to original condensed water conveying flow after flash distillation；Heat exchanger is delivered in the exhaust steam that one-level condensed water flash tank flashes off, and is used
In the alkali lye that heating evaporation device group first evaporator is sent, the condensed water after heating is dodged into B-grade condensation water flash tank
Steam；The flash distillation exhaust steam of B-grade condensation water flash tank delivers to evaporator group first evaporator as heat source；After heat exchanger heats
Alkali lye flashed into alkali lye flash vessel, flash distillation exhaust steam deliver to evaporator group first evaporator be used for heat alkali lye, alkali lye
Alkali lye delivers to original alkali lye flash vessel after flash vessel flash distillation.
Initial steam heater is connected by the first pipeline with one-level condensed water flash tank.
One-level condensed water flash tank is connected by second pipe with B-grade condensation water flash tank, and one-level condensed water flash tank leads to
The 3rd pipeline is crossed to be connected with heat exchanger.
B-grade condensation water flash tank is connected by the 4th pipeline with the tenth pipeline, and B-grade condensation water flash tank passes through the 5th pipe
Road is connected with original condensed water conveying flow.
Heat exchanger is connected by the 6th pipeline with second pipe, and heat exchanger is connected by the 7th pipeline with alkali lye flash vessel.
Alkali lye flash vessel is connected by the 9th pipeline with the tenth pipeline, and alkali lye flash vessel passes through the 11st pipeline and original alkali
Liquid flash vessel connects.
Evaporator group first evaporator is connected by the 8th pipeline with heat exchanger.
B-grade condensation water flash tank is connected by the 4th pipeline with other user equipmenies.
Heat exchanger and alkali lye flasher combination are falling film evaporator.
Advantages of the present invention effect：The present invention is used to heat first effect using a high-temperature condensation water flash distillation, its exhaust steam is increased
Evaporator discharging alkali lye, the exhaust steam that the alkali lye after heating flashes off still are used for heating evaporation device group first evaporator（Or other use
Family）, so, total quantity of steam for heating first evaporator is constant, but adds the alkali lye evaporation volume in system, its evaporation volume
Equal to the steam amount of alkali lye flash vessel.In the case that if system evaporation volume keeps constant, equivalent to reducing alkali lye flash vessel
The steaming steam consumption of steam amount equivalent, improves efficiency of utilization, reduces the steam consumption of production system, can further reduce production
Cost.
Brief description of the drawings
Fig. 1 is the flow chart of the present invention.
In figure：1st, initial steam heater；2nd, the first pipeline；3rd, one-level condensed water flash tank；
4th, second pipe；5th, B-grade condensation water flash tank；6th, the 5th pipeline；7th, the 3rd pipeline；8th, the 6th pipeline；9th, the 4th pipe
Road；10th, the tenth pipeline；11st, evaporator group first evaporator；12nd, the 8th pipeline；13rd, heat exchanger；14th, the 7th pipeline；15th, alkali
Liquid flash vessel；16th, the 11st pipeline；17th, original alkali lye flash vessel；18th, the 9th pipeline.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
The method that a kind of raising system evaporation volume of the invention reduces the steam consumption as shown in the figure, increase the flash distillation level of high-temperature condensation water
Number, flash distillation exhaust steam are used for heating evaporation device group first evaporator discharging alkali lye.
Flash distillation series is two-stage, and the initial steam of high pressure dissolving out process passes through the indirectly heat of high temperature dissolution initial steam heater 1
Condensed water is flashed into one-level condensed water flash tank 3 afterwards, and condensed water enters B-grade condensation water flash tank 5 after primary flash,
Condensed water is incorporated to original condensed water conveying flow after two-stage flash；Heat exchange is delivered in the exhaust steam that one-level condensed water flash tank 3 flashes off
Device 13, the alkali lye sent for heating evaporation device group first evaporator 11, the condensed water after heating flash into B-grade condensation water
Tank 5 is flashed；The flash distillation exhaust steam of B-grade condensation water flash tank 5 delivers to evaporator group first evaporator 11 and is used as heat source；Through
Alkali lye after heat exchanger 13 heats is flashed into alkali lye flash vessel 15, and evaporator group first evaporator 11 is delivered in flash distillation exhaust steam
For heating alkali lye, alkali lye delivers to original alkali lye flash vessel 17 after alkali lye flash vessel 15 flashes.
Initial steam heater 1 is connected by the first pipeline 2 with one-level condensed water flash tank 3.
One-level condensed water flash tank 3 is connected by second pipe 4 with B-grade condensation water flash tank 5, one-level condensed water flash
Tank 3 is connected by the 3rd pipeline 7 with heat exchanger 13.
B-grade condensation water flash tank 5 is connected by the 4th pipeline 9 with the tenth pipeline 10, and B-grade condensation water flash tank 5 passes through
5th pipeline 6 is connected with original condensed water conveying flow.
Heat exchanger 13 is connected by the 6th pipeline 8 with second pipe 4, and heat exchanger 13 is flashed by the 7th pipeline 14 with alkali lye
Device 15 connects.
Alkali lye flash vessel 15 is connected by the 9th pipeline 18 with the tenth pipeline 10, and alkali lye flash vessel 15 passes through the 11st pipeline
16 are connected with original alkali lye flash vessel 17.
Evaporator group first evaporator 11 is connected by the 8th pipeline 12 with heat exchanger 13.
B-grade condensation water flash tank 5 is connected by the 4th pipeline 9 with other user equipmenies.
Heat exchanger 13 and alkali lye flash vessel 15 are combined as falling film evaporator.
Calculated with producing 1000000 tons of alumina producing scales per year, dissolution live steam condensed water amount about 215t/h, heat first effect and steam
Hair device discharging mother liquor can flash steam amount about 8t/h more, you can compared to few evaporated water 8t/h, steam steam consumption according to unit
0.2t- vapour/t- water, 65 yuan/t of steam price are calculated, can be saved 800,000 yuan of expense every year, effectively reduce production cost.
Claims (10)
1. a kind of method that raising system evaporation volume reduces the steam consumption, it is characterised in that increase the flash distillation series of high-temperature condensation water, dodge
Steam exhaust steam and be used for heating evaporation device group first evaporator discharging alkali lye.
2. the method that a kind of raising system evaporation volume according to claim 1 reduces the steam consumption, it is characterised in that flash distillation series
It is cold into one-level by condensed water after high temperature dissolution initial steam heater indirectly heat for two-stage, the initial steam of high pressure dissolving out process
Condensate flash tank is flashed, and condensed water enters B-grade condensation water flash tank after primary flash, and condensed water is incorporated to after two-stage flash
Original condensed water conveys flow；Heat exchanger is delivered in the exhaust steam that one-level condensed water flash tank flashes off, first for heating evaporation device group
The alkali lye that effect evaporator is sent, the condensed water after heating are flashed into B-grade condensation water flash tank；B-grade condensation water flashes
Tank flash distillation exhaust steam delivers to evaporator group first evaporator as heat source；Alkali lye after heat exchanger heats flashes into alkali lye
Device is flashed, and flash distillation exhaust steam delivers to evaporator group first evaporator and is used to heat alkali lye, and alkali lye is sent after the flash distillation of alkali lye flash vessel
To original alkali lye flash vessel.
3. the method that a kind of raising system evaporation volume according to claim 2 reduces the steam consumption, it is characterised in that initial steam adds
Hot device is connected by the first pipeline with one-level condensed water flash tank.
4. the method that a kind of raising system evaporation volume according to claim 2 reduces the steam consumption, it is characterised in that one-level condenses
Water flash tank is connected by second pipe with B-grade condensation water flash tank, and one-level condensed water flash tank passes through the 3rd pipeline and heat exchange
Device connects.
5. the method that a kind of raising system evaporation volume according to claim 2 reduces the steam consumption, it is characterised in that B-grade condensation
Water flash tank is connected by the 4th pipeline with the tenth pipeline, and B-grade condensation water flash tank is defeated by the 5th pipeline and original condensed water
Flow is sent to connect.
6. the method that a kind of raising system evaporation volume according to claim 2 reduces the steam consumption, it is characterised in that heat exchanger leads to
Cross the 6th pipeline to be connected with second pipe, heat exchanger is connected by the 7th pipeline with alkali lye flash vessel.
7. the method that a kind of raising system evaporation volume according to claim 2 reduces the steam consumption, it is characterised in that alkali lye flashes
Device is connected by the 9th pipeline with the tenth pipeline, and alkali lye flash vessel is connected by the 11st pipeline with original alkali lye flash vessel.
8. the method that a kind of raising system evaporation volume according to claim 2 reduces the steam consumption, it is characterised in that evaporator group
First evaporator is connected by the 8th pipeline with heat exchanger.
9. the method that a kind of raising system evaporation volume according to claim 5 reduces the steam consumption, it is characterised in that B-grade condensation
Water flash tank is connected by the 4th pipeline with other user equipmenies.
10. the method that a kind of raising system evaporation volume according to claim 2 reduces the steam consumption, it is characterised in that heat exchanger and
Alkali lye flasher combination is falling film evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610701228.2A CN107754363A (en) | 2016-08-23 | 2016-08-23 | A kind of method that raising system evaporation volume reduces the steam consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610701228.2A CN107754363A (en) | 2016-08-23 | 2016-08-23 | A kind of method that raising system evaporation volume reduces the steam consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107754363A true CN107754363A (en) | 2018-03-06 |
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ID=61264515
Family Applications (1)
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| CN201610701228.2A Pending CN107754363A (en) | 2016-08-23 | 2016-08-23 | A kind of method that raising system evaporation volume reduces the steam consumption |
Country Status (1)
| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779008A (en) * | 2018-07-31 | 2020-02-11 | 沈阳铝镁设计研究院有限公司 | Water returning device and method for high-temperature fresh steam condensate water of alumina plant |
| 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 |
| CN113277538A (en) * | 2021-06-18 | 2021-08-20 | 沈阳铝镁设计研究院有限公司 | Method for reducing consumption of new steam in alumina production |
| CN113509740B (en) * | 2021-06-28 | 2022-06-17 | 中国铝业股份有限公司 | System and method for improving flash evaporation effect of stock solution of falling film evaporator |
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| US3951752A (en) * | 1966-03-15 | 1976-04-20 | Roller Paul S | Method and apparatus for converting saline water to fresh water |
| CN1405090A (en) * | 2002-11-12 | 2003-03-26 | 中国铝业股份有限公司 | Bayer production method for aluminium oxide |
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| CN101704539A (en) * | 2009-09-11 | 2010-05-12 | 中铝国际技术发展有限公司 | Method and device for evaporating mother liquid in aluminium oxide plant |
| CN202099075U (en) * | 2011-05-27 | 2012-01-04 | 东北大学设计研究院（有限公司） | Tubulation and staying tank dissolving-out system of gibbsite bauxite |
| CN104098117A (en) * | 2013-04-12 | 2014-10-15 | 沈阳铝镁设计研究院有限公司 | High-pressure dissolution-out and evaporation combined energy-saving method in production of aluminium oxide |
| CN104477955A (en) * | 2014-12-30 | 2015-04-01 | 东北大学设计研究院（有限公司） | Novel vapor condensate water temperature reduction and heat reclaim method in aluminum oxide production |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3951752A (en) * | 1966-03-15 | 1976-04-20 | Roller Paul S | Method and apparatus for converting saline water to fresh water |
| CN1405090A (en) * | 2002-11-12 | 2003-03-26 | 中国铝业股份有限公司 | Bayer production method for aluminium oxide |
| CN1915827A (en) * | 2006-09-11 | 2007-02-21 | 贵阳铝镁设计研究院 | Method and equipment for vaporizing full flash distillation of sodium aluminate liquor in technique for producing alumina |
| CN101575107A (en) * | 2008-05-08 | 2009-11-11 | 沈阳铝镁设计研究院 | Respective self-evaporation technology of new steam condensate and secondary steam condensate |
| CN101704539A (en) * | 2009-09-11 | 2010-05-12 | 中铝国际技术发展有限公司 | Method and device for evaporating mother liquid in aluminium oxide plant |
| CN202099075U (en) * | 2011-05-27 | 2012-01-04 | 东北大学设计研究院（有限公司） | Tubulation and staying tank dissolving-out system of gibbsite bauxite |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779008A (en) * | 2018-07-31 | 2020-02-11 | 沈阳铝镁设计研究院有限公司 | Water returning device and method for high-temperature fresh steam condensate water of alumina plant |
| 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 |
| CN112537790B (en) * | 2020-12-15 | 2024-06-04 | 山东南山铝业股份有限公司 | High-low temperature combined digestion unit for Bayer process |
| CN113277538A (en) * | 2021-06-18 | 2021-08-20 | 沈阳铝镁设计研究院有限公司 | Method for reducing consumption of new steam in alumina production |
| CN113509740B (en) * | 2021-06-28 | 2022-06-17 | 中国铝业股份有限公司 | System and method for improving flash evaporation effect of stock solution of falling film evaporator |
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Application publication date: 20180306 |
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