CN101723423A - Recycling method for high-pressure dissolved new steam condensate - Google Patents
Recycling method for high-pressure dissolved new steam condensate Download PDFInfo
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- CN101723423A CN101723423A CN200910222547A CN200910222547A CN101723423A CN 101723423 A CN101723423 A CN 101723423A CN 200910222547 A CN200910222547 A CN 200910222547A CN 200910222547 A CN200910222547 A CN 200910222547A CN 101723423 A CN101723423 A CN 101723423A
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Abstract
The invention discloses a recycling method for high-pressure dissolved new steam condensate during the process of producing aluminum oxide. The method comprises the steps of: steaming the new steam condensate which is generated by heating a heating and pressing boiler in a new steam condensate water tank in order to form a secondary steam, mixing the secondary steam in the new steam condensate water tank with the secondary steam in a first-step flash tank in a pipeline for transferring the secondary steam from the first-step flash tank to a last step pre-heating and pressing boiler, and sending the mixed steam to the last step pre-heating and pressing boiler in order to preheat. The method recycles the new steam condensate generated by the heating and pressing boiler thereby greatly decreasing the consumption of high-pressure new steam.
Description
Technical field
The present invention relates to the alumina producing field, particularly relate to a kind of aluminum oxide condensed water of new steam stripped under high pressure and use.
Background technology
The aluminum oxide pressure digestion system is the core of aluminum oxide, the raw pulp of sending here from raw material mill is heated to ore pulp after 260 ℃ and insulation fully react gradually through pre-thermal sleeve, preheating autoclave, heating autoclave, insulation autoclave, send into 10 grades of flasher self-evaporatint n.s, heat in the material is fully discharged, slurry temperature, pressure are reduced gradually, after the final stage flasher passes out to dilution trap, this moment material temperature about 105 ℃, enter next procedure through the material after the dilution.Pre-thermal sleeve, preheating autoclave be utilize secondary vapour that flash drum discharges step by step correspondence heat, the heating autoclave is to heat with live steam, the temperature of live steam is generally at 280 ℃, water of condensation after the heating generally also has 270 ℃ high temperature, and this part water of condensation directly enters the low-pressure steam recycling that the condensed water flash groove flashes to 150 ℃ (0.5Mpa is following) usually.
The heating autoclave adds the live steam condensed water (270 ℃ high temperature is generally arranged) of thermogenesis, be not reused, but directly advance the low-pressure steam that the condensed water flash groove flashes to 150 ℃ (0.5Mpa is following), with 150 ℃ of hot water, so make the heat energy of the high pressure steam sent here from power plant fully not obtain utilizing, and the hot water that carries a large amount of heats has directly returned power plant again, has caused the waste of the energy.
The utility model content
1. the technical problem that will solve
The technical problem to be solved in the present invention is, provides a kind of condensed water of new steam stripped under high pressure to utilize method again, and condensed water of new steam stripped under high pressure is utilized again, avoids the waste of the energy.
2. technical scheme
For addressing the above problem, the invention provides a kind of condensed water of new steam stripped under high pressure and utilize method again.Present method may further comprise the steps: the live steam condensed water that adds thermogenesis at the heating autoclave is flashed to secondary vapour in each live steam condensed water jar; From first step flash drum to the end the pre-hot pressing of one-level boil the pipeline of pipe feeding secondary vapour, the secondary vapour in the live steam condensed water jar is mixed with the secondary vapour of first step flash drum; Mixed steam is delivered to last step preheating autoclave carry out preheating.
3. beneficial effect
Use method of the present invention that condensed water of new steam stripped under high pressure is utilized again, can make the preheating temperature of last step preheating autoclave improve 5 ℃～7 ℃.By the low-pressure steam of the recyclable about 7.25t/h of the inventive method, improve 7 ℃ according to preheating temperature and calculate, can make the consumption of high pressure live steam reduce to 1.67t/t, the about 0.18t/t of savings from 1.85t/t.High pressure live steam unit price is by 80 yuan/t, and then alumina production cost can reduce by 14.4 yuan/t, and every group of aluminum oxide output is by 450000t/, and every group of year saved 6,480,000 yuan/year of the amount of money.Calculate by a medium-sized alumina producer, four groups of high pressure strippings are generally arranged, like this, annual total can be saved about 2,592 ten thousand yuan of the amount of money, energy-saving effect highly significant.
Description of drawings
Fig. 1 is the figure that expression high pressure live steam condensed water of the present invention utilizes system again.
Among the figure: 1, first step flash drum; 2, last step preheating autoclave; 3, live steam condensed water jar.
Embodiment
Followingly describe with reference to the preferred embodiment that utilizes method again of accompanying drawing to condensed water of new steam stripped under high pressure of the present invention.
Fig. 1 is the figure that expression high pressure live steam condensed water of the present invention utilizes system again.As shown in the figure, after high pressure live steam condensed water jar 3 outlet connected with ￠ 168 pipes, be connected to secondary vapour is transported to the pipeline of last step preheating autoclave 2 from first step flash drum 1.
Condensed water of new steam stripped under high pressure of the present invention utilizes method to comprise the steps: the live steam condensed water that adds thermogenesis at the heating autoclave is flashed to secondary vapour in each live steam condensed water jar 3 again, and this live steam condensed water of 270 ℃ that the heating autoclave can be produced flashes to the secondary vapour of 235 ℃ (3.0Mpa); From first step flash drum 1 to the end the pre-hot pressing of one-level boil the pipe 2 feeding secondary vapour pipeline, the secondary vapour in the live steam condensed water jar 3 is mixed with the secondary vapour of first step flash drum 1; Mixed steam is transported to last step preheating autoclave 2 carries out preheating, this makes preheating temperature bring up to 220～222 ℃, 5～7 ℃ of temperature risings, the consumption that can save a large amount of saving high pressure live steams from 215 ℃.
Claims (2)
1. a condensed water of new steam stripped under high pressure utilizes method again, it is characterized in that present method may further comprise the steps:
The live steam condensed water that adds thermogenesis at the heating autoclave is flashed to secondary vapour in each live steam condensed water jar;
From first step flash drum to the end the pre-hot pressing of one-level boil the pipeline of pipe feeding secondary vapour, the secondary vapour in the live steam condensed water jar is mixed with the secondary vapour of first step flash drum;
Mixed steam is delivered to last step preheating autoclave carry out preheating.
2. condensed water of new steam stripped under high pressure as claimed in claim 1 utilizes method again, it is characterized in that, the secondary vapour that evaporates in described live steam condensed water jar is 235 ℃, the vapour of 3.0Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102225475A CN101723423B (en) | 2009-11-13 | 2009-11-13 | Recycling method for high-pressure dissolved new steam condensate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102225475A CN101723423B (en) | 2009-11-13 | 2009-11-13 | Recycling method for high-pressure dissolved new steam condensate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101723423A true CN101723423A (en) | 2010-06-09 |
| CN101723423B CN101723423B (en) | 2012-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102225475A Expired - Fee Related CN101723423B (en) | 2009-11-13 | 2009-11-13 | Recycling method for high-pressure dissolved new steam condensate |
Country Status (1)
| Country | Link |
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| CN (1) | CN101723423B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2009
- 2009-11-13 CN CN2009102225475A patent/CN101723423B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Publication number | Publication date |
|---|---|
| CN101723423B (en) | 2012-07-18 |
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Effective date of registration: 20180626 Address after: 472100 Sanmenxia West Industrial Park, Henan Province Patentee after: Cayman aluminium (Sanmenxia) Co., Ltd. Address before: 310005 20-22 building, Jinjiang tower, 111 Hu Shu Nan Road, Hangzhou, Zhejiang. Patentee before: Hangzhou Jinjiang Group Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120718 Termination date: 20201113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |