CN101049951B - Technique and equipment for using exhaust steam in production of alumina - Google Patents
Technique and equipment for using exhaust steam in production of alumina Download PDFInfo
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- CN101049951B CN101049951B CN200710011237XA CN200710011237A CN101049951B CN 101049951 B CN101049951 B CN 101049951B CN 200710011237X A CN200710011237X A CN 200710011237XA CN 200710011237 A CN200710011237 A CN 200710011237A CN 101049951 B CN101049951 B CN 101049951B
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- well heater
- exhaust steam
- wash water
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Abstract
This invention relates to technique and apparatus for utilizing steam exhaust in aluminum oxide production system. The apparatus is characterized by: The water outlet end of the diluting tank and the end-stage water condenser is connected with the washing water heater. The water outlet pipe of the evaporated water or fresh water transportation pipeline is connected with the washing water heater. The hot water outlet pipe of the washing water heater is connected with the hot water tank. The apparatus has such advantages as low secondary steam leakage and low energy consumption.
Description
Technical field
The present invention relates to a kind of exhaust steam and utilize Processes and apparatus, particularly relate to and a kind ofly in the alumina producing system, press the exhaust steam boil the stripping operation to utilize technology and equipment thereof.
Background technology
Boil in the stripping operation in the pressure of existing aluminum oxide production process, raw pulp reaches the stripping temperature by indirect or direct heating, after stopping in the insulation digester, need carry out the flash distillation cooling to reclaim its waste heat to stripping slurry.Slip discharging from the final stage flash-pot after red mud wash liquor and aluminum hydroxide wash liquor mix, is delivered to the laterite washing operation by dilution pumps to dilution trap.
There is following problem in existing treatment process: can flash off a large amount of secondary steams in the dilution trap; Final stage condensation water pot flashes off a large amount of secondary steams simultaneously.Because this two-part vapour amount often fluctuates, thus on-the-spot not high to the utilization ratio of two-part exhaust steam, cause leaking in a large number of exhaust steam.When exhaust steam leaked, band was expected easily, and there is certain danger in this to operating environment, and loss of energy.
Summary of the invention
The present invention is that exhaust steam utilizes technology and equipment thereof in a kind of alumina producing that above production problem provides in order to solve, and its objective is for the energy consumption that leaks, reduces production process that reduces secondary steam and improves whole production technology.
For reaching above-mentioned purpose, the present invention is achieved in that exhaust steam utilizes technology in the alumina producing, direct Hybrid Heating is carried out in secondary steam that comes out from final stage condensation water pot and the secondary steam that comes out from the dilution trap flash distillation and evaporation water or new water down the wash water well heater, heated hot water is used for the red mud wash water.
Water or new water are delivered in the wash water well heater by transferpump under the described evaporation.
Described heated hot water is delivered in the hot water tank of red mud separation and washing procedure by transferpump.
Described heated hot water is by in the hot water tank that is depressed into red mud separation and washing procedure certainly.
Water or new water carry out direct heating the wash water well heater down with evaporation again behind the interflow earlier for described secondary steam that comes out from final stage condensation water pot and the secondary steam that comes out from the dilution trap flash distillation.
It is described that to carry out direct Hybrid Heating in the wash water well heater be to take to spray the direct heating method to carry out Hybrid Heating.
The inlet amount interlocked control of water or new water under described wash water heater outlet hot water temperature and the evaporation.
Excess steam in the described wash water well heater is released in the safety groove, with effective protection total system.
The steam outlet at wash water well heater top is connected with safety groove, to absorb the excessive exhaust steam under the abnomal condition.
Exhaust steam utilizes equipment in the alumina producing, it is to be made of following structure: the steam output end of dilution trap and final stage condensation water pot is connected with the wash water well heater, the rising pipe of water or new water transfer line is connected with the wash water well heater under the evaporation, and the hot water outlet pipe of wash water well heater is connected with hot water tank.
On the hot water outlet pipe of described wash water well heater, temperature measuring equipment is set, on transfer line water under the evaporation or new water, variable valve is set, temperature measuring equipment and variable valve interlocked control.
Described wash water well heater is connected with safety groove.
Described safety groove is connected with the steam outlet at wash water well heater top.
Be connected with transferpump on the transfer line of water or new water under the described evaporation.
Be connected with transferpump on the hot water outlet pipe of described wash water well heater.
Advantage of the present invention and effect are as follows:
The present invention adopts with water under the evaporation of evaporization process or new water as cold water source, and takes to spray the direct heating technology with the secondary steam at interflow and carry out Hybrid Heating, by regulating the heat that flooding quantity effectively absorbs secondary steam.Can effectively adsorb secondary steam like this.Hot water is by pump or be depressed into red mud certainly and separate in the hot water tank with washing procedure, can utilize system's waste heat like this.Reduce the energy consumption of production process.Tracheae by the wash water well heater links to each other with safety groove, when being in an emergency, exhaust steam and exhaust steam with slip can be disposed to fast and effectively in the safety groove, improve the security of digestion series.
Description of drawings
Fig. 1 is a synoptic diagram of the present invention.
In the accompanying drawing: 1, wash water well heater; 2, dilution trap; 3, final stage condensation water pot; 4, hot water tank; 5, safety groove; 6, transferpump; 7, water or new water under the evaporation.
Embodiment
Below inventive embodiment is described in detail in conjunction with the accompanying drawings, but protection scope of the present invention is not limit by embodiment.
Exhaust steam utilizes technology in the alumina producing; the steam interflow that steam that flash distillation is come out from dilution trap 2 and 3 flash distillations of final stage condensation water pot are come out; enter into wash water well heater 1; evaporation down water or new water 7 is delivered to wash water well heater 1 by transferpump 6 and is taked to spray the direct heating technology with the secondary steam at interflow and carry out Hybrid Heating; wash water after the heating by pump or the mode of pressing certainly be delivered to red mud and separate in the hot water tank 4 with washing procedure; on the hot water outlet pipe of wash water well heater 1, temperature survey is set; on the inlet pipe of water under the evaporation or new water, variable valve is set; hot water temperature and variable valve interlocked control; when being in an emergency; excess steam in the wash water well heater; can be released into fast in the safety groove 5, with effective protection total system.In the wash water well heater, carry out direct heating with following water of evaporation or new water 7 again behind the stream.
As shown in Figure 1, exhaust steam utilizes equipment in the alumina producing of the present invention, it is to be made of following structure: the water side of dilution trap 2 and final stage condensation water pot 3 is connected with wash water well heater 1, the rising pipe of water or new water 7 transfer lines is connected with wash water well heater 1 under the evaporation, the hot water outlet pipe of wash water well heater 1 is connected with hot water tank, is connected with transferpump on the hot water outlet pipe.On the hot water outlet pipe of wash water well heater, temperature measuring equipment is set, on transfer line water under the evaporation or new water 7, variable valve is set, temperature measuring equipment and variable valve interlocked control.The steam outlet at wash water well heater 1 top is connected with safety groove 5.Be connected with transferpump 6 on the transfer line of water or new water 7 under the evaporation.
Claims (12)
1. exhaust steam utilizes technology in the alumina producing, direct Hybrid Heating is carried out in the secondary steam that it is characterized in that the secondary steam that comes out from final stage condensation water pot and come out from the dilution trap flash distillation and evaporation water or new water down the wash water well heater, heated hot water is used for the red mud wash water; It is described that to carry out direct Hybrid Heating in the wash water well heater be to take to spray the direct heating method to carry out Hybrid Heating; The inlet amount interlocked control of water or new water under described wash water heater outlet hot water temperature and the evaporation.
2. exhaust steam utilizes technology in the alumina producing according to claim 1, it is characterized in that under the described evaporation that water or new water delivers in the wash water well heater by transferpump.
3. exhaust steam utilizes technology in the alumina producing according to claim 1, it is characterized in that described heated hot water delivers to red mud by transferpump and separate in the hot water tank with washing procedure.
4. exhaust steam utilizes technology in the alumina producing according to claim 1, it is characterized in that described heated hot water is by in the hot water tank that is depressed into red mud separation and washing procedure certainly.
5. exhaust steam utilizes technology in the alumina producing according to claim 1, it is characterized in that the described secondary steam that comes out from final stage condensation water pot and the secondary steam that comes out from the dilution trap flash distillation water or new water carry out direct heating the wash water well heater down with evaporation again behind the interflow earlier.
6. exhaust steam utilizes technology in the alumina producing according to claim 1, it is characterized in that the excess steam in the described wash water well heater is released in the safety groove, with effective protection total system.
7. exhaust steam utilizes technology in the alumina producing according to claim 1, it is characterized in that the steam outlet at wash water well heater top is connected with safety groove, to absorb the excessive exhaust steam under the abnomal condition.
8. exhaust steam utilizes equipment in the alumina producing, it is characterized in that it is to be made of following structure: the steam output end of dilution trap (2) and final stage condensation water pot (3) is connected with wash water well heater (1), the rising pipe of water or new water (7) transfer line is connected with wash water well heater (1) under the evaporation, and the hot water outlet pipe of wash water well heater (1) is connected with hot water tank (4); On the hot water outlet pipe of described wash water well heater (1) temperature measuring equipment is set, on transfer line water under the evaporation or new water (7), variable valve is set, temperature measuring equipment and variable valve interlocked control.
9. exhaust steam utilizes equipment in the alumina producing according to claim 8, it is characterized in that described wash water well heater (1) is connected with safety groove (5).
10. exhaust steam utilizes equipment in the alumina producing according to claim 9, it is characterized in that described safety groove (5) is connected with the steam outlet at wash water well heater (1) top.
11. exhaust steam utilizes equipment in the alumina producing according to claim 8, it is characterized in that being connected with transferpump (6) on the transfer line of water under the described evaporation or new water (7).
12. exhaust steam utilizes equipment in the alumina producing according to claim 8, it is characterized in that being connected with transferpump on the hot water outlet pipe of described wash water well heater (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710011237XA CN101049951B (en) | 2007-05-09 | 2007-05-09 | Technique and equipment for using exhaust steam in production of alumina |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710011237XA CN101049951B (en) | 2007-05-09 | 2007-05-09 | Technique and equipment for using exhaust steam in production of alumina |
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| Publication Number | Publication Date |
|---|---|
| CN101049951A CN101049951A (en) | 2007-10-10 |
| CN101049951B true CN101049951B (en) | 2010-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200710011237XA Active CN101049951B (en) | 2007-05-09 | 2007-05-09 | Technique and equipment for using exhaust steam in production of alumina |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103288109A (en) * | 2013-06-24 | 2013-09-11 | 中国铝业股份有限公司 | Alumina high pressure dissolution dilution ore slurry exhaust steam recovery method |
| CN103771472A (en) * | 2014-02-14 | 2014-05-07 | 张高博 | Method for recovering and utilizing exhausted steam from alumina production device by Bayer process |
| CN106545058A (en) * | 2015-09-21 | 2017-03-29 | 沈阳铝镁设计研究院有限公司 | A kind of hot water slot structure |
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Owner name: SHENYANG ALUMINUM + MAGNESIUM ENGINEERING + RESEAR Free format text: FORMER NAME: SHENYANG ALUMINIUM AND MAGNESIUM DESIGN INST. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 110001 Heping Street, Heping District, Liaoning, Shenyang, No. 184 Patentee after: Shenyang Aluminum & Magnesium Engineering & Research Institute Co., Ltd. Address before: 110001 Heping Street, Heping District, Liaoning, Shenyang, No. 184 Patentee before: Shenyang Aluminium and Magnesium Design Institute |