CN101665259A - Ore pulp heat exchange method and system - Google Patents
Ore pulp heat exchange method and system Download PDFInfo
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- CN101665259A CN101665259A CN200810013066A CN200810013066A CN101665259A CN 101665259 A CN101665259 A CN 101665259A CN 200810013066 A CN200810013066 A CN 200810013066A CN 200810013066 A CN200810013066 A CN 200810013066A CN 101665259 A CN101665259 A CN 101665259A
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- ore pulp
- heat exchange
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- pipe heater
- double pipe
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- 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
Abstract
The invention discloses an ore pulp heat exchange system, and in particular relates to an ore pulp heat exchange method and an ore pulp heat change system after leaching in alumina production. The orepulp heat change system has the following structure: a heated material pipe passes through a double pipe heat exchanger and is communicated with a heat preservation remaining digester; a leached orepulp pipe is communicated with the heat preservation remaining digester; and the leached ore pulp pipe passes through the double pipe heat exchanger and is communicated with a diluting tank for separating and washing red mud. The ore pulp heat exchange system has the following advantage that: the ore pulp heat exchange system not only can fully utilize the heat of leached ore pulp, but also can simplify flow and reduce investment, and is an important measure for reducing energy consumption, saving energy and improving economic benefit in the alumina production.
Description
Technical field
The present invention relates to a kind of ore pulp heat exchange system, relate in particular to ore pulp heat exchange method after a kind of stripping and system in the alumina producing.
Background technology
Press in the existing Bayer process alumina producing and boil stripping, need reduce heat exhaustion, improve efficiency of utilization by various means as the highest operation of hear rate.Because the bauxite stripping all needs higher temperature, general ore pulp at first passes through the secondary steam preheating, and then heating reaches the stripping temperature through media such as live steam or fused salts.Existing alumina producer all is to produce secondary steam by slip self-evaporatint n. after the stripping to come the preheating ore pulp, and dissolved mineral slurry enters dilution trap after the self-evaporatint n., again with being pumped into the red mud separating, washing operation.This method has the heat of recycling ore pulp self, the advantages such as smooth operation that help next operation, but whole technological process is very complicated, and this method need drop into a large amount of equipment, and investment is big, and the heat recuperation effect neither be fine, therefore how can make full use of the heat of ore pulp after the stripping, can simplify flow process again, reduce investment, be cut down the consumption of energy in the alumina producing, save energy, the important measures of increasing economic efficiency.
Summary of the invention
The present invention is exactly a kind of ore pulp heat exchange method and the system of providing in order to solve the problems of the technologies described above, purpose is the effect that reaches ore pulp heat exchange efficiently, easily, and whole process flow is simple, easy handling, thus can reduce investment, cut down the consumption of energy, save energy.
For reaching above-mentioned purpose, the present invention is achieved in that a kind of ore pulp heat exchange method, its processing step is as follows: be heated the double pipe heater that enters by other heating medium heating behind the double pipe heater of material via the dissolved mineral slurry preheating and heat, in insulation stops digester, be heated ore pulp then and stop stripping, ore pulp turns back to by the new a collection of material that is heated of preheating in the double pipe heater of dissolved mineral slurry preheating again after the stripping, directly delivers in the dilution trap of red mud separating, washing at last.
Described be heated the first step double pipe heater of material from double pipe heater and enter after to the last in the one-level double pipe heater.
Heated medium in the last step double pipe heater in the described double pipe heater is heated to the stripping temperature of ore pulp by heating medium.
The ore pulp that is heated in the described last step double pipe heater enters into insulation stop digester.
The ore pulp that described insulation stops stripping in the digester turns back in the penultimate stage double pipe heater.
Dissolved mineral slurry in the described penultimate stage double pipe heater enters into the dilution trap of red mud separating, washing operation after by first step double pipe heater.
Described first step double-tube heat exchanger is at the vertex of whole double-tube heat exchanger group.
Described last step double-tube heat exchanger is in the lower-most point of whole double-tube heat exchanger group.
Described double-tube heat exchanger is single sleeve pipe or many sleeve pipes.
Described polysleeve interior pipe radical is the 2-10 root.
The described material that is heated is ore pulp or alkali lye.
A kind of ore pulp heat exchange system, constitute by following structure: be heated the material pipe and pass double-tube heat exchanger and stop digester with insulation and communicate, ore pulp pipe stops digester with insulation and communicates after the stripping, and ore pulp pipe is passed double-tube heat exchanger and is communicated with the dilution trap of red mud separating, washing after the stripping.
Described double-tube heat exchanger is 2-20.
Described last step double pipe heater communicates with the heating medium pipe.
Described penultimate stage double pipe heater is communicated with ore pulp pipe after the stripping.
Advantage of the present invention and effect are as follows:
The present invention can make full use of the heat of ore pulp after the stripping, can simplify flow process again, reduces investment, be cut down the consumption of energy in the alumina producing, save energy, the important measures of increasing economic efficiency.
Description of drawings
Fig. 1 is the structural representation of ore pulp heat exchange of the present invention system.
Accompanying drawing: 1, be heated the material pipe; 2, ore pulp pipe after the stripping; 3, heating medium pipe; 4, first step double pipe heater; 5, penultimate stage double pipe heater, 6, last step double pipe heater; 7, insulation stops digester; 8, dilution trap.
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.
A kind of ore pulp heat exchange method of the present invention, its processing step is as follows: be heated the double pipe heater that enters by other heating medium heating behind the double pipe heater of material via the dissolved mineral slurry preheating and heat, in insulation stops digester, be heated ore pulp then and stop stripping, ore pulp turns back to by the new a collection of material that is heated of preheating in the double pipe heater of dissolved mineral slurry preheating again after the stripping, directly delivers in the dilution trap of red mud separating, washing at last; After being heated the first step double pipe heater of material from double pipe heater and entering to the last in the one-level double pipe heater, heated medium in the last step double pipe heater in the double pipe heater is heated to the temperature of dissolved mineral slurry by heating medium, the material that is heated in the last step double pipe heater enters into insulation stop digester, the ore pulp that insulation stops stripping in the digester enters in the penultimate stage double pipe heater, dissolved mineral slurry in the penultimate stage double pipe heater enters into the dilution trap of red mud separating, washing operation after by first step double pipe heater, first step double-tube heat exchanger is at the vertex of whole double-tube heat exchanger group, and the last step double-tube heat exchanger is in the lower-most point of whole double-tube heat exchanger group.
Described double-tube heat exchanger is single sleeve pipe or many sleeve pipes, and polysleeve interior pipe radical is the 2-10 root.
Being heated material is ore pulp and alkali lye.
As shown in Figure 1, a kind of ore pulp heat exchange of the present invention system, constitute by following structure: be heated material pipe 1 and pass double-tube heat exchanger and stop digester 7 with insulation and communicate, ore pulp pipe 2 communicates with insulation stop digester 7 after the stripping, ore pulp pipe 2 is passed double-tube heat exchanger and is communicated with the dilution trap 8 of red mud separating, washing after the stripping, and double-tube heat exchanger is 2-20.Last step double pipe heater 6 communicates with heating medium pipe 3, and penultimate stage double pipe heater 5 is communicated with ore pulp pipe 2 after the stripping.
Principle of work of the present invention: the material that is heated that is heated in the material pipe 1 enters from first step double pipe heater 4, enter last step double pipe heater 6 at last, the material that is heated that comes out from last step double pipe heater 6 enters insulation stop digester 7, ore pulp enters from penultimate stage double pipe heater 5 after stopping the stripping that digester 7 comes out from insulation, directly enter the dilution trap 8 that is located at red mud separating, washing after the heat exchange after first step double pipe heater 4 flows out, the material that is heated that enters last step double pipe heater 6 is heated to reach the needed temperature of stripping by heating medium.
Claims (15)
1, a kind of ore pulp heat exchange method, it is characterized in that constituting: be heated the double pipe heater that enters by other heating medium heating behind the double pipe heater of material via the dissolved mineral slurry preheating and heat by following step, in insulation stops digester, be heated ore pulp then and stop stripping, ore pulp turns back to by the new a collection of material that is heated of preheating in the double pipe heater of dissolved mineral slurry preheating again after the stripping, directly delivers in the dilution trap of red mud separating, washing at last.
2, ore pulp heat exchange method according to claim 1, it is characterized in that described be heated the first step double pipe heater of material from double pipe heater and enter after to the last in the one-level double pipe heater.
3, ore pulp heat exchange method according to claim 2 is characterized in that the heated medium in the last step double pipe heater in the described double pipe heater is heated to the stripping temperature of ore pulp by heating medium.
4, ore pulp heat exchange method according to claim 3 is characterized in that the material that is heated in the described last step double pipe heater enters into insulation stop digester.
5, ore pulp heat exchange method according to claim 4 is characterized in that the ore pulp of stripping in the described insulation stop digester turns back in the penultimate stage double pipe heater.
6, ore pulp heat exchange method according to claim 5 is characterized in that entering into after dissolved mineral slurry in the described penultimate stage double pipe heater is by the first step double pipe heater dilution trap of red mud separating, washing operation.
7, ore pulp heat exchange method according to claim 6 is characterized in that the vertex of described first step double-tube heat exchanger in whole double-tube heat exchanger group.
8, ore pulp heat exchange method according to claim 4 is characterized in that the lower-most point of described last step double-tube heat exchanger in whole double-tube heat exchanger group.
9,, it is characterized in that described double-tube heat exchanger is single sleeve pipe or many sleeve pipes according to any one the described ore pulp heat exchange method in the claim 1 to 8.
10,, it is characterized in that polysleeve interior pipe radical is the 2-10 root according to any one the described ore pulp heat exchange method in the claim 1 to 8.
11, ore pulp heat exchange method according to claim 1 is characterized in that the described material that is heated is ore pulp or alkali lye.
12, a kind of ore pulp heat exchange system, it is characterized in that constituting: be heated the material pipe and pass double-tube heat exchanger and stop digester with insulation and communicate by following structure, ore pulp pipe stops digester with insulation and communicates after the stripping, and ore pulp pipe is passed double-tube heat exchanger and is communicated with the dilution trap of red mud separating, washing after the stripping.
13, ore pulp heat exchange according to claim 12 system is characterized in that described double-tube heat exchanger is 2-20.
14, ore pulp heat exchange according to claim 13 system is characterized in that described last step double pipe heater communicates with the heating medium pipe.
15, ore pulp heat exchange according to claim 13 system is characterized in that described penultimate stage double pipe heater is communicated with ore pulp pipe after the stripping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810013066A CN101665259A (en) | 2008-09-02 | 2008-09-02 | Ore pulp heat exchange method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810013066A CN101665259A (en) | 2008-09-02 | 2008-09-02 | Ore pulp heat exchange method and system |
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| Publication Number | Publication Date |
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| CN101665259A true CN101665259A (en) | 2010-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810013066A Pending CN101665259A (en) | 2008-09-02 | 2008-09-02 | Ore pulp heat exchange method and system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225779A (en) * | 2011-05-11 | 2011-10-26 | 三门峡巨新冶金技术有限公司 | High-pressure dissolution system and method for bauxite |
| CN102531004A (en) * | 2010-12-21 | 2012-07-04 | 贵阳铝镁设计研究院有限公司 | Method and device for dissolving out diaspore under high pressure |
| US8936320B2 (en) | 2008-06-17 | 2015-01-20 | Pinnacle Potash International, Ltd. | Method and system for solution mining |
| CN105271325A (en) * | 2014-06-27 | 2016-01-27 | 沈阳铝镁设计研究院有限公司 | Method for heating alkali liquor in alkali liquor tank for alkali wash in aluminum oxide plant |
| CN105698573A (en) * | 2015-02-03 | 2016-06-22 | 中国恩菲工程技术有限公司 | Novel wet lixiviated material heat exchanging system and heat exchanging method thereof |
-
2008
- 2008-09-02 CN CN200810013066A patent/CN101665259A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8936320B2 (en) | 2008-06-17 | 2015-01-20 | Pinnacle Potash International, Ltd. | Method and system for solution mining |
| CN102531004A (en) * | 2010-12-21 | 2012-07-04 | 贵阳铝镁设计研究院有限公司 | Method and device for dissolving out diaspore under high pressure |
| CN102531004B (en) * | 2010-12-21 | 2014-09-10 | 贵阳铝镁设计研究院有限公司 | Method and device for dissolving out diaspore under high pressure |
| CN102225779A (en) * | 2011-05-11 | 2011-10-26 | 三门峡巨新冶金技术有限公司 | High-pressure dissolution system and method for bauxite |
| CN105271325A (en) * | 2014-06-27 | 2016-01-27 | 沈阳铝镁设计研究院有限公司 | Method for heating alkali liquor in alkali liquor tank for alkali wash in aluminum oxide plant |
| CN105271325B (en) * | 2014-06-27 | 2017-05-24 | 沈阳铝镁设计研究院有限公司 | Method for heating alkali liquor in alkali liquor tank for alkali wash in aluminum oxide plant |
| CN105698573A (en) * | 2015-02-03 | 2016-06-22 | 中国恩菲工程技术有限公司 | Novel wet lixiviated material heat exchanging system and heat exchanging method thereof |
| CN105698573B (en) * | 2015-02-03 | 2018-09-11 | 中国恩菲工程技术有限公司 | Wet-leaching material-heat-exchanging system and its heat-exchange method |
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Open date: 20100310 |