CN103011483B - Sea water desalting plant with ion trapper - Google Patents
Sea water desalting plant with ion trapper Download PDFInfo
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- CN103011483B CN103011483B CN201210573711.9A CN201210573711A CN103011483B CN 103011483 B CN103011483 B CN 103011483B CN 201210573711 A CN201210573711 A CN 201210573711A CN 103011483 B CN103011483 B CN 103011483B
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Abstract
The invention relates to a sea water desalting plant with an ion trapper, belonging to the technical field of corrosion protection of a sea water system. A multi-effect evaporation sea water desalting plant of the sea water desalting plant is connected with a condenser through a secondary steam pipe; an ion trapper is arranged between a sea water outlet of the condenser and a sea water inlet of the multi-effect evaporation sea water desalting plant; and a large-area-ratio low-potential ion trapping filler is fully filled in the ion trapper. The metallic aluminum filler in the ion trapper has large contact area with sea water; and after sea water is treated by the ion trapper, high-potential metallic ions in the sea water are adsorbed by the filler, and thus, factors for corroding galvanic cells on the aluminum alloy matrix surface disappear, thereby lowering the corrosive power of the sea water on the aluminum alloy. The ion trapper arranged after the tail end condenser of the multi-effect evaporation sea water desalting plant can effectively trap the heavy metal ions in the preheated sea water, thereby lowering the corrosion of the sea water on the heat exchange tube in the evaporator.
Description
Technical field
The present invention relates to a kind of sea water desalinating plant that adopts ion-catching device, belong to the anticorrosion technique field of sea water system.
Technical background
Heat transfer tube is an important component part in low temperature multiple-effect distillation sea water desalting device, the performance of its material directly affects installation cost and operational efficiency, select the material that low cost and sea water corrosion resistant are good, contribute to desalination technology to be applied to field more widely.
Aluminium alloy is the material that a kind of cost is lower, heat transfer property is good, can be used as heat-transfer pipe and uses.But in sea water desalinating plant, seawater, as a kind of electrolyte solution, can make the low potential such as aluminium and aluminium alloy material generation galvanic corrosion.Thereby produce when defect when wearing and tearing occur aluminum alloy surface, due at a lot " large negative electrode-primary anode " the type corrosion galvanic cell of aluminium alloy matrix surface quantity of formation, corrosion reaction can cause material that corrosion projection phenomenon occurs very soon.Meanwhile, due to flowing of seawater, its corrosion speed increases considerably.Mechanism of corrosion for aluminium alloy in seawater, takes to control the measure of heavy metal in seawater ionic concn, contributes to slow down so that eliminates the corrosion of seawater to aluminium alloy, ensures the reliability that it applies in sea water desalinating plant.
Summary of the invention
Weaken the object of seawater for the corrosion of aluminum alloy heat transfer tube in order to realize, the invention provides a kind of sea water desalinating plant that adopts ion-catching device, this sea water desalinating plant application ion-catching device carries out pre-treatment to seawater, can weaken the corrodibility of seawater to aluminum alloy heat transfer tube.
The technical solution used in the present invention is: a kind of sea water desalinating plant that adopts ion-catching device, it comprises a condenser and desalting seawater through multi-effect evaporation device, and the desalting seawater through multi-effect evaporation device that is provided with a heating steam inlet tube adopts secondary steam pipe to connect condenser; Between the seawer outlet of described condenser and the sea intake of desalting seawater through multi-effect evaporation device, be provided with an ion-catching device, at the solid big area ratio of ion-catching device, the ion-catching filler of low potential.
Described ion-catching filler is selected aluminium, magnesium or the zinc metallic substance of making round or sheet structure, in ion-catching device, is honeycomb arrangement.
In described ion-catching device, be provided with the traverse baffle of staggered arrangement, between each traverse baffle, fill described ion-catching filler.
Described ion-catching device adopts pressure-bearing type structure or vertically placed type structure.
Adopt above-mentioned technical scheme, fresh seawater completes preheating and degassed in condenser, flows through ion-catching device as the charging seawater of evaporative process, enters into each effect of vaporizer after each preheater of then flowing through successively; Seawater enters after vaporizer, absorb the latent heat of vaporization of steam in generating tube and evaporate, the steam generating forms secondary steam after vapour liquid separator, remaining seawater enters in lower 1st effective evaporator by effect, in lower 1st effective evaporator, repeat spray, evaporation, condensation process, concentrated seawater is separating device in the minimum last evaporator of temperature.At steam side, heating steam enters in the heat-transfer pipe of vaporizer and at in-tube condensation, manage outer evaporation of seawater, generation secondary steam, evaporation, condensation process repeat in each single-effect evaporator, and the secondary steam in last evaporator is that fresh water is discharged by seawater condensing in condenser.
The invention has the beneficial effects as follows: the desalting seawater through multi-effect evaporation device that the sea water desalinating plant of this employing ion-catching device is provided with a heating steam inlet tube adopts secondary steam pipe to connect condenser; Between the seawer outlet of condenser and the sea intake of desalting seawater through multi-effect evaporation device, be provided with an ion-catching device, at the solid big area ratio of ion-catching device, the ion-catching filler of low potential.Aluminum metal filler and seawater in ion-catching device have very large contact area, and seawater is after ion-catching device is processed, and the noble potential metal ion in seawater is (as Fe
3+, Cu
2+deng) adsorbed by filler, the factor that forms corrosion galvanic cell at aluminium alloy matrix surface disappears, thereby has reduced the corrodibility of seawater for aluminium alloy.After ion-catching device is arranged on to desalting seawater through multi-effect evaporation device end condenser, can effectively catch the heavy metal ion in the seawater after preheating, thereby reduce the corrosion of seawater to heat transfer tube in vaporizer.
Brief description of the drawings
Fig. 1 is a kind of sea water desalinating plant systematic schematic diagram that adopts ion-catching device.
Fig. 2 is the structure iron of pressure-bearing type ion-catching device.
Fig. 3 is the structure iron of vertically placed type ion-catching device
In figure: 1, condenser, 2, ion-catching device, 2a, seawater water inlet pipe, 2b, box flange, 2c, casing, 2d, seawater rising pipe, 2e, traverse baffle, 2f, ion-catching filler, 3, desalting seawater through multi-effect evaporation device, 4, heating steam inlet tube, 5, secondary steam pipe.
Embodiment
Fig. 1 shows a kind of sea water desalinating plant systematic schematic diagram that adopts ion-catching device.In figure, the sea water desalinating plant of this employing ion-catching device comprises a condenser 1 and desalting seawater through multi-effect evaporation device 3, and the desalting seawater through multi-effect evaporation device 3 that is provided with a heating steam inlet tube 4 adopts secondary steam pipe 5 to connect condenser 1.Between the seawer outlet of condenser 1 and the sea intake of desalting seawater through multi-effect evaporation device 3, be provided with an ion-catching device 2, at the solid big area ratio of ion-catching device 2, the ion-catching filler 2f of low potential.Ion-catching filler 2f selects aluminium, magnesium or the zinc metallic substance of making round or sheet structure, in ion-catching device 2, is honeycomb arrangement.In ion-catching device 2, be provided with the traverse baffle 2e of staggered arrangement, between each traverse baffle 2e, fill described ion-catching filler 2f.Ion-catching device 2 adopts pressure-bearing type structure (as shown in Figure 2) or vertically placed type structure (as shown in Figure 3).
The solid big area ratio of above-mentioned ion-catching device 2, low potential metal material (as aluminium, magnesium, zinc etc.), due to the existence of potential difference, metallic stuffing is played noble potential metal ion in adsorbing seawater (as Fe
3+, Cu
2+deng metal ion) effect, and there is electrochemical reaction, thereby reach the object that catches heavy metal ion, reduce so that eliminate the galvanic corrosion of seawater for sea water desalinating plant heat transfer tube.
After ion-catching device 2 is arranged on the condenser 1 of desalting seawater through multi-effect evaporation device 3 ends, be that first fresh seawater b carries out preheating by condenser 1, seawater enters ion-catching device 2 after preheating, seawater enters desalting seawater through multi-effect evaporation device 3 and carries out evaporation and heat-exchange after ion-catching device 2 is processed, and generates respectively fresh water c and strong brine a and flows out sea water desalinating plant.
Fig. 2 shows the structure iron of pressure-bearing type ion-catching device.The agent structure of pressure-bearing type ion-catching device comprises seawater water inlet pipe 2a, box flange 2b, casing 2c, seawater rising pipe 2d, traverse baffle 2e and ion-catching filler 2f, should increase as far as possible the contact area of ion-catching filler 2f and seawater, therefore ion-catching filler 2f can take the structure of various bending sheets or porous medium, is honeycomb arrangement.Seawater water inlet pipe 2a and seawater rising pipe 2d are located at respectively on the both sides end plate of ion-catching casing.
Fig. 3 shows the structure iron of vertically placed type ion-catching device.The agent structure of vertically placed type ion-catching device comprises seawater water inlet pipe 2a, box flange 2b, casing 2c, seawater rising pipe 2d, traverse baffle 2e and ion-catching filler 2f, should increase as far as possible the contact area of ion-catching filler 2f and seawater, therefore ion-catching filler 2f can take the structure of various bending sheets or porous medium, is honeycomb arrangement.Seawater water inlet pipe 2a presses close to upper box flange, and seawater rising pipe 2d presses close to lower box flange, and seawater water inlet pipe 2a will be far above the position of seawater rising pipe 2d.
Claims (1)
1. one kind adopts the sea water desalinating plant of ion-catching device, it comprises a condenser (1) and desalting seawater through multi-effect evaporation device (3), and the desalting seawater through multi-effect evaporation device (3) that is provided with a heating steam inlet tube (4) adopts secondary steam pipe (5) to connect condenser (1); It is characterized in that: between the seawer outlet of described condenser (1) and the sea intake of desalting seawater through multi-effect evaporation device (3), be provided with an ion-catching device (2), seawater enters desalting seawater through multi-effect evaporation device after ion-catching apparatus is processed, at the solid big area ratio of ion-catching device (2), the ion-catching filler (2f) of low potential; Ion-catching device is as the seawater pretreating device entering before desalting seawater through multi-effect evaporation device.
2. according to a kind of sea water desalinating plant that adopts ion-catching device described in claims 1, it is characterized in that: described ion-catching device (2) is arranged on desalting seawater through multi-effect evaporation device end condenser (1) afterwards, be that first seawater carries out preheating by sea water desalinating plant end condenser, seawater enters ion-catching device after preheating, and seawater enters desalting seawater through multi-effect evaporation device (3) evaporation and heat-exchange after ion-catching device is processed.
3. according to a kind of sea water desalinating plant that adopts ion-catching device described in claims 1, it is characterized in that: described ion-catching filler (2f) is selected aluminium, magnesium or the zinc metallic substance of making round or sheet structure, in ion-catching device (2), is honeycomb arrangement.
4. according to a kind of sea water desalinating plant that adopts ion-catching device described in claim 1 or 3, it is characterized in that: in described ion-catching device (2), be provided with the traverse baffle (2e) of staggered arrangement, between each traverse baffle (2e), fill described ion-catching filler (2f).
5. a kind of sea water desalinating plant that adopts ion-catching device according to claim 1, is characterized in that: described ion-catching device (2) adopts pressure-bearing type structure or vertically placed type structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210573711.9A CN103011483B (en) | 2012-12-26 | 2012-12-26 | Sea water desalting plant with ion trapper |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210573711.9A CN103011483B (en) | 2012-12-26 | 2012-12-26 | Sea water desalting plant with ion trapper |
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| CN103011483A CN103011483A (en) | 2013-04-03 |
| CN103011483B true CN103011483B (en) | 2014-06-25 |
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| CN201210573711.9A Expired - Fee Related CN103011483B (en) | 2012-12-26 | 2012-12-26 | Sea water desalting plant with ion trapper |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191874A (en) * | 2016-07-08 | 2016-12-07 | 中国人民解放军92537部队 | A kind of method and device preventing microcosmic galvanic corrosion |
| CN108558106A (en) * | 2018-05-15 | 2018-09-21 | 大连理工大学 | A kind of aluminium-alloy pipe is applied to the method for sea water desalination falling film evaporator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303001C (en) * | 2002-04-05 | 2007-03-07 | Wme风力驱动海水淡化有限公司 | Evaporator tube for a sea water desalination plant |
| CN102344218A (en) * | 2011-06-29 | 2012-02-08 | 哈尔滨汽轮机厂辅机工程有限公司 | Seawater desalination system using secondary steam for preheating |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59203685A (en) * | 1983-05-02 | 1984-11-17 | Mitsubishi Heavy Ind Ltd | Apparatus for desalination of sea water |
| JPS6099380A (en) * | 1983-11-02 | 1985-06-03 | Mitsubishi Heavy Ind Ltd | Corrosion inhibiting method of seawater desalination apparatus |
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- 2012-12-26 CN CN201210573711.9A patent/CN103011483B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303001C (en) * | 2002-04-05 | 2007-03-07 | Wme风力驱动海水淡化有限公司 | Evaporator tube for a sea water desalination plant |
| CN102344218A (en) * | 2011-06-29 | 2012-02-08 | 哈尔滨汽轮机厂辅机工程有限公司 | Seawater desalination system using secondary steam for preheating |
Non-Patent Citations (4)
| Title |
|---|
| JP昭59-203685A 1984.11.17 |
| JP昭60-99380A 1985.06.03 |
| 低温多效蒸发海水淡化系统不同进料方式的热力学分析;卢涛 等;《热科学与技术》;20120630;第11卷(第2期);142-147页图1-4 * |
| 卢涛 等.低温多效蒸发海水淡化系统不同进料方式的热力学分析.《热科学与技术》.2012,第11卷(第2期),142-147页图1-4. |
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