CN103288109A - Alumina high pressure dissolution dilution ore slurry exhaust steam recovery method - Google Patents
Alumina high pressure dissolution dilution ore slurry exhaust steam recovery method Download PDFInfo
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- CN103288109A CN103288109A CN2013102510485A CN201310251048A CN103288109A CN 103288109 A CN103288109 A CN 103288109A CN 2013102510485 A CN2013102510485 A CN 2013102510485A CN 201310251048 A CN201310251048 A CN 201310251048A CN 103288109 A CN103288109 A CN 103288109A
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Abstract
The present invention relates to an alumina high pressure dissolution dilution ore slurry exhaust steam recovery method, which is characterized in that alumina high pressure dissolution dilution ore slurry exhaust steam and water are subjected to direct heat exchange during a recovery process. According to the alumina high pressure dissolution dilution ore slurry exhaust steam recovery method, the adopted column plate type large channel heat exchanger process position is that an inlet exhaust steam interface is a hot water tank gas exhaust cylinder, wherein the high pressure dissolution dilution ore slurry exhaust steam passes through the hot water tank, such that an alkali liquid and a material can enter the hot water by gravity settling so as to substantially reduce the alkali carried by the exhaust steam and the material carried by the exhaust steam, and slow down a scab speed of equipment and pipelines. In addition, various levels of column plate flow channels of the column plate type large channel heat exchanger are large and are provided with large cleaning manholes so as to easily clean and repair.
Description
Technical field
The present invention relates to a kind of aluminum oxide high pressure stripping dilution ore pulp exhaust steam recovery method.
Background technology
In aluminum oxide production process, high pressure stripping dissolved mineral slurry is from the discharging of final stage flasher, advance dilution trap after dilution, flash distillation are further lowered the temperature, send the dilution pit, exhaust steam after flash distillation emptying after wash water well heater and spray water carry out heat exchange, hot water send the filtration hot water tank, because there are following defective in existing wash water well heater and technology, it is not thorough to cause exhaust steam residual heat to reclaim, and production run is undesired.Major defect has: the exhaust steam band alkali after the high pressure stripping flash distillation, band material, and well heater and pipeline very easily stop up, and the cycle of operation is only about one month; Existing wash water well heater is unreasonable because of its structure and technology, stops up to be difficult to the cleaning maintenance, causes operating performance relatively poor; Heat can not fully absorb, and still has a large amount of exhaust steam emptyings, has caused the waste of heat energy.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at existing Technology, providing a kind of can further recycle the exhaust steam of aluminum oxide high pressure stripping dilution ore pulp band alkali low pressure, improve the exhaust steam utilising efficiency, reduce the thermal waste that causes because of emptying and the aluminum oxide high pressure stripping dilution ore pulp exhaust steam recovery method of environmental pollution.
The objective of the invention is to be achieved through the following technical solutions.
A kind of aluminum oxide high pressure stripping dilution ore pulp exhaust steam recovery method is characterized in that its removal process reclaims the mode that aluminum oxide high pressure stripping dilution ore pulp exhaust steam and water carry out direct heat exchange.
A kind of aluminum oxide high pressure stripping dilution ore pulp exhaust steam recovery method of the present invention is characterized in that the direct heat exchange device that described removal process adopts is column plate type major path interchanger.
A kind of aluminum oxide high pressure stripping dilution ore pulp exhaust steam recovery method of the present invention, after it is characterized in that described removal process enters hot water tank with the exhaust steam of aluminum oxide high pressure stripping dilution ore pulp, by exhaust steam tube exhaust steam is delivered to column plate type major path interchanger, the water at low temperature of carrying out direct heat exchange with exhaust steam is entered by column plate type major path interchanger top, exhaust steam is entered by column plate type major path interchanger middle part sidewall, column plate type major path interchanger column plate makes water to be heated form cascade, and exhaust steam is risen, fallen under water and carry out counterflow heat exchange; Hot water behind the recovery waste heat is discharged by column plate type major path interchanger bottom, delivers to sintering process hot wash-water groove by hot water pump, is used for the red mud from sintering process wash water.
A kind of aluminum oxide high pressure stripping dilution ore pulp exhaust steam recovery method of the present invention, adopting column plate type major path interchanger technology position is the hot water tank exhaust steam tube for its entrance exhaust steam interface, because the exhaust steam of high pressure stripping dilution ore pulp is through hot water tank, alkali lye and material are entered in the hot water by gravity settling, reduce exhaust steam band alkali and band material greatly, slow down equipment and pipeline scarring speed.While column plate type major path interchanger column plate runners at different levels are big and be provided with big cleaning manhole, are easy to cleaning, maintenance.
Description of drawings
Fig. 1 is process flow diagram of the present invention.
1 is spray water among its figure, and 2 is the wash water well heater, and 3 is the dilution trap exhaust steam, 4 is the dissolved mineral slurry dilution trap, and 5 is the exhaust steam of wash water well heater, and 6 is wash water, 7 is the hot water tank exhaust steam tube, and 8 are the exhaust steam control valve, and 9 is hot water tank, 10 is the hot water tank exhaust steam tube, and 11 for sending the filtration hot water pump, and 12 is column plate type major path interchanger, 13 is water at low temperature, and 14 is column plate type major path interchanger exhaust steam evacuated tube, and 15 is hot water pump, 16 is the delivery pipeline, and 17 is the sintering process hot water tank.
Embodiment
A kind of aluminum oxide high pressure stripping dilution ore pulp exhaust steam recovery method, the mode that its removal process adopts water and the exhaust steam of band alkali low pressure to carry out direct heat exchange, the heat-exchanger rig of employing is column plate type major path interchanger; After its dilution trap exhaust steam enters hot water tank, by exhaust steam tube is connected with heat-exchanger rig, exhaust steam is delivered in the heat-exchanger rig; The water at low temperature that direct heat exchange is carried out in itself and exhaust steam is entered by column plate type major path interchanger top, the exhaust steam of band alkali low pressure is entered by column plate type major path interchanger middle part sidewall, column plate type major path interchanger column plate can make water to be heated form cascade, and exhaust steam is risen, fallen under water and carry out counterflow heat exchange.Hot water behind the recovery waste heat is discharged by column plate type major path interchanger bottom, delivers to sintering process hot wash-water groove by hot water pump, is used for the red mud from sintering process wash water.Column plate type major path interchanger technology position is the hot water tank exhaust steam tube for its entrance exhaust steam interface, because the exhaust steam of high pressure stripping dilution ore pulp stops certain hour through hot water tank, alkali lye and material are entered in the hot water by gravity settling, reduce exhaust steam band alkali and band material greatly, slow down equipment and pipeline scarring speed.While column plate type major path interchanger column plate runners at different levels are big and be provided with big cleaning manhole, are easy to cleaning, maintenance.
During operation, after dilution trap exhaust steam 3 enters hot water tank 9, by exhaust steam tube 10 is connected with heat-exchanger rig 12, exhaust steam is delivered in the heat-exchanger rig.The water at low temperature 13 that direct heat exchange is carried out in itself and exhaust steam is entered by column plate type major path interchanger top, the exhaust steam of band alkali low pressure is entered by column plate type major path interchanger middle part sidewall, column plate type major path interchanger column plate makes water to be heated form cascade, and exhaust steam is risen, fallen under water and carry out counterflow heat exchange.Hot water behind the recovery waste heat is discharged by column plate type major path interchanger bottom, delivers to sintering process hot wash-water groove 17 by hot water pump 15, is used for the red mud from sintering process wash water.
Claims (3)
1. aluminum oxide high pressure stripping dilution ore pulp exhaust steam recovery method is characterized in that its removal process reclaims the mode that aluminum oxide high pressure stripping dilution ore pulp exhaust steam and water carry out direct heat exchange.
2. a kind of aluminum oxide high pressure stripping dilution ore pulp exhaust steam recovery method according to claim 1 is characterized in that the direct heat exchange device that described removal process adopts is column plate type major path interchanger.
3. ore pulp exhaust steam recovery method is diluted in a kind of aluminum oxide high pressure stripping according to claim 1, after it is characterized in that described removal process enters hot water tank with the exhaust steam of aluminum oxide high pressure stripping dilution ore pulp, by exhaust steam tube exhaust steam is delivered to column plate type major path interchanger, the water at low temperature of carrying out direct heat exchange with exhaust steam is entered by column plate type major path interchanger top, exhaust steam is entered by column plate type major path interchanger middle part sidewall, column plate type major path interchanger column plate makes water to be heated form cascade, and exhaust steam is risen, fallen under water and carry out counterflow heat exchange; Hot water behind the recovery waste heat is discharged by column plate type major path interchanger bottom, delivers to sintering process hot wash-water groove by hot water pump, is used for the red mud from sintering process wash water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102510485A CN103288109A (en) | 2013-06-24 | 2013-06-24 | Alumina high pressure dissolution dilution ore slurry exhaust steam recovery method |
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| CN2013102510485A CN103288109A (en) | 2013-06-24 | 2013-06-24 | Alumina high pressure dissolution dilution ore slurry exhaust steam recovery method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101049951A (en) * | 2007-05-09 | 2007-10-10 | 沈阳铝镁设计研究院 | Technique and equipment for using exhaust steam in production of alumina |
| CN101825360A (en) * | 2010-05-10 | 2010-09-08 | 贵阳铝镁设计研究院 | Method and device for recycling high-pressure dissolved steam exhaust of diluting tank in alumina production |
| CN102491385A (en) * | 2011-11-18 | 2012-06-13 | 中国铝业股份有限公司 | Method for using dissolved exhaust steam in alumina production |
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2013
- 2013-06-24 CN CN2013102510485A patent/CN103288109A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101049951A (en) * | 2007-05-09 | 2007-10-10 | 沈阳铝镁设计研究院 | Technique and equipment for using exhaust steam in production of alumina |
| CN101825360A (en) * | 2010-05-10 | 2010-09-08 | 贵阳铝镁设计研究院 | Method and device for recycling high-pressure dissolved steam exhaust of diluting tank in alumina production |
| CN102491385A (en) * | 2011-11-18 | 2012-06-13 | 中国铝业股份有限公司 | Method for using dissolved exhaust steam in alumina production |
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Application publication date: 20130911 |