CN201347368Y - Seawater desalination evaporator - Google Patents
Seawater desalination evaporator Download PDFInfo
- Publication number
- CN201347368Y CN201347368Y CNU2008201449380U CN200820144938U CN201347368Y CN 201347368 Y CN201347368 Y CN 201347368Y CN U2008201449380 U CNU2008201449380 U CN U2008201449380U CN 200820144938 U CN200820144938 U CN 200820144938U CN 201347368 Y CN201347368 Y CN 201347368Y
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- CN
- China
- Prior art keywords
- generating tube
- tank
- generating
- seawater desalination
- heat exchange
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
Abstract
The utility model relates to a seawater desalination evaporator, which is characterized in that the seawater desalination evaporator comprises a shell, a water distribution system, a one-pass steam-generating bank, a two-pass steam-generating bank, a pipe sheet, a mist eliminator, a fresh-water tank and a concentrated water tank. The seawater desalination evaporator has the advantages that the seawater spraying process is shortened, and seawater is ensured to be evenly sprayed to the heat exchange pipes of each layer so as to increase the utilization rate of the heat exchange tubes, improve the heat exchange condition of the evaporator, reduce the number of the heat exchange pipes and reduce the device cost; the water distribution disproportionation of the generating pipes of the lower layer, which results in the phenomena of a dry wall and dry cremation, is effectively avoided, and the erosion and the aging of the generating pipes are reduced; a heat exchange area is fully utilized, and the heat exchange efficiency of the device is increased under the condition of the same number of the generating pipes; the space of the evaporator shell is more fully utilized. The length of the generating pipe in the one-pass steam-generating bank is the same as that of the generating pipe in the two-pass steam-generating bank, but the diameter, material, number can be identical, and can also be different; the mist eliminator can also be designed into different shapes and different kinds of material, and different operating principles of mist elimination can be adopted.
Description
(1) technical field:
The utility model relates to the sea water desaltination field, especially a kind of seawater desalination evaporators.
(2) background technology:
Sea water desaltination claims sea water desalinization again, is the technology and the process of separating salt and water in the seawater.Distillation method instant heating method is the desalination technology that adopts the earliest, is the topmost method of sea water desaltination.Distillation sea water desalting is with the seawater heating evaporation, makes vapor condensation obtain the process of fresh water again.
Multiple-effect evaporation is to allow the seawater after heating evaporate in a plurality of placed in-line vaporizers, the steam that previous evaporator evaporation is come out is as the thermal source of next vaporizer, and condensation becomes fresh water, this evaporation and condensation process repeat along each effect of a string vaporizer always, and every effect has all produced a considerable amount of distilled water.In the multiple-effect evaporation method, low temperature multiple-effect distillation (LT-MED) is one of method for saving energy in the distillation method.
The LT-MED sea water desalting equipment is imitated steam condenser, seawater pre-heaters by vaporizer, end.The water distribution system of vaporizer inner top, generating tube tank nest and tube sheet thereof, mist eliminator, fresh-water tank, compositions such as dense water tank.Steam is input to generating tube inside, pipe is outer by the water distribution system sprayed sea water, carry out thermal exchange inside and outside the pipe, vapor condenses becomes fresh water to be pooled to fresh-water tank in the pipe, manage outer seawater evaporation and produce steam, filter by mist eliminator and to enter next behind the drop and imitate tube side, unevaporated seawater is pooled to dense water tank and collects.
At present, horizontal pipe falling film evaporation is generally adopted in the LT-MED sea water desaltination, the section of vaporizer is designed to circle more, internal heat exchange tubes Shu Weichang rectangular arranged, tube sheet are long rectangle, and the vaporizer top is provided with water distribution system, seawater is sprayed in the generating tube tank nest by water distribution system, part Absorption by Sea Water heat of vaporization is a steam, and all the other seawater flow to lower floor's generating tube and continue evaporation, does not have the seawater of evaporation to enter dense hydroecium at last.There is following problem at present in this form vaporizer:
1, the diameter of LT-MED seawater desalination evaporators is general bigger, if long rectangular arranged is adopted in generating tube tank nest, the cloth water area is less relatively, the sprayed sea water amount is more on the top base layer heat transfer tube, the liquid film that forms is thick, and it is unfavorable to evaporate conducting heat, and can not make full use of heat energy;
2, because the top-down spray long flow path of seawater, and seawater also evaporating when flowing down, and the seawater amount that flows to the bottom generating tube is reduced gradually, and distributes and be difficult for evenly, cause the heat transfer tube of bottom to be prone to dried wall phenomenon, easily cause heat transfer tube aging;
3, because generating tube tank nest bottom heat transfer tube often is in dry-fire condition, cause the heat interchanging area waste, do not reach the designed capacity of equipment;
4, because the evaporator shell design section is designed to circle, and tube sheet is long rectangle, thereby the enclosure interior space is more, causes waste, has increased installation cost expense and manufacturing expense simultaneously;
5, because the evaporator shell design section is designed to roundly, and large-scale sea water desalinating plant excessive overall height requires all than higher bottom support and plant designing, capital cost and installation costs are all than higher.
(3) utility model content:
The purpose of this utility model is to provide a kind of seawater desalination evaporators, and it can solve the deficiencies in the prior art, and has reduced the installation cost expense, and it is aging to reduce the heat transfer tube corrosion simultaneously, makes the intravital space utilization of evaporator shell more abundant.
The technical solution of the utility model: a kind of low-temperature multiple-effect seawater desalination evaporator, it is characterized in that it is made of housing, water distribution system, a journey generating tube tank nest and two journey generating tube tank nests, tube sheet, mist eliminator, fresh-water tank and dense water tank, the section of its middle shell is oval; Said water distribution system places the top of housing; Said tube sheet is connected in the housing, and a journey generating tube tank nest and two journey generating tube tank nests are installed in the tube sheet from the bottom to top; A said journey generating tube tank nest is connected fresh-water tank respectively with two journey generating tube tank nests; The said journey generating tube tank nest outside is connected with mist eliminator, and the below is dense water tank.
Above-mentioned said section is oval-shaped housing, and its vertical direction is oval minor axis, and horizontal direction is a long axis of ellipse.
An above-mentioned said journey generating tube tank nest and two journey generating tube tank nests are arranged by flat orthogonal mode, and promptly the line number of generating tube is less than columns.
Above-mentioned said tube sheet is flat rectangle.
Above-mentioned said water distribution system is selected nozzle, spray dish or shower for use.
Working process of the present utility model is: (1) steam enters in the journey generating tube tank nest, enters the two journey generating tube tank nests from a journey generating tube tank nest again; (2) seawater enters the shell side of evaporator shell by water distribution system, from top to bottom generating tube is sprayed; (3) vapor condensation in the generating tube becomes fresh water to be pooled to fresh-water tank; The outer seawater of the generating tube of (4) one journey generating tube tank nests partly evaporates the generation secondary steam, by entering tube side behind the mist eliminator; (5) unevaporated seawater is pooled to dense water tank, discharges after the preheating.
Superiority of the present utility model is: the spray flow process of seawater is shortened, guarantee that seawater evenly sprays on the heat transfer tube of each layer, improve the heat transfer tube utilization ratio, improve vaporizer heat exchange situation, and reduce heat transfer tube quantity, reduce the installation cost expense; 2, effectively avoid lower floor's generating tube owing to uneven dried wall and the dry combustion method phenomenon that causes of water distribution, it is aging to reduce the generating tube corrosion; 3, easier realization seawater evenly sprays, and the device water distribution system is required to reduce; 4, make full use of heat interchanging area, improved the heat exchange efficiency of device under the identical situation of generating tube number, space utilization is more abundant in the evaporator shell; 5, simple in structure, the device of equal scale significantly reduces on the height of equipment, effectively reduces capital construction and installation costs; 6, a journey generating tube tank nest is identical with generating tube length in the two journey generating tube tank nests, but diameter, material, quantity can be the same or different; 7, mist eliminator also can be designed to different shapes, unlike material and employing different catch the foam principle of work.
(4) description of drawings:
Fig. 1 is the structural representation of the related a kind of seawater desalination evaporators of the utility model.
Fig. 2 is the side-view of Fig. 1.
Wherein, 1 is housing, and 2 is water distribution system, and 3-1 is that a journey generating tube tank nest, 3-2 are two journey generating tube tank nests, and 4 is tube sheet, and 5 is mist eliminator, and 6 is fresh-water tank, and 7 is dense water tank.
(5) embodiment:
Embodiment: a kind of seawater desalination evaporators (seeing Fig. 1-2), it is characterized in that it is made of housing 1, water distribution system 2, a journey generating tube tank nest 3-1 and two journey generating tube tank nest 3-2, tube sheet 4, mist eliminator 5, fresh-water tank 6 and dense water tank 7, the section of its middle shell 1 is oval; Said water distribution system 2 places the top of housing 1; Said tube sheet 4 is connected in the housing 1, and a journey generating tube tank nest 3-1 and two journey generating tube tank nest 3-2 are installed in the tube sheet 4 from the bottom to top; A said journey generating tube tank nest 3-1 is connected fresh-water tank 6 respectively with two journey generating tube tank nest 3-2; The said journey generating tube tank nest 3-1 outside is connected with mist eliminator 5, and the below is dense water tank 7.
Above-mentioned said section is oval-shaped housing 1, and its vertical direction is oval minor axis, and horizontal direction is the long axis of ellipse (see figure 1).
An above-mentioned said journey generating tube tank nest 3-1 and two journey generating tube tank nest 3-2 arrange by flat orthogonal mode, and promptly the line number of generating tube is less than the columns (see figure 1).
Above-mentioned said tube sheet 4 is flat rectangle (see figure 1).
Above-mentioned said water distribution system 2 is selected nozzle for use.
Claims (5)
1, a kind of seawater desalination evaporators is characterized in that it is made of housing, water distribution system, a journey generating tube tank nest and two journey generating tube tank nests, tube sheet, mist eliminator, fresh-water tank and dense water tank, and the section of its middle shell is oval; Said water distribution system places the top of housing; Said tube sheet is connected in the housing, and a journey generating tube tank nest and two journey generating tube tank nests are installed in the tube sheet from the bottom to top; A said journey generating tube tank nest is connected fresh-water tank respectively with two journey generating tube tank nests; The said journey generating tube tank nest outside is connected with mist eliminator, and the below is dense water tank.
2, according to the said a kind of seawater desalination evaporators of claim 1, it is characterized in that said section is oval-shaped housing, its vertical direction is oval minor axis, horizontal direction is a long axis of ellipse.
3, according to the said a kind of seawater desalination evaporators of claim 1, it is characterized in that a said journey generating tube tank nest and two journey generating tube tank nests arrange by flat orthogonal mode, promptly the line number of generating tube is less than columns.
4,, it is characterized in that said tube sheet is flat rectangle according to the said a kind of seawater desalination evaporators of claim 1.
5,, it is characterized in that said water distribution system selects nozzle, spray dish or shower for use according to the said a kind of seawater desalination evaporators of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201449380U CN201347368Y (en) | 2008-12-25 | 2008-12-25 | Seawater desalination evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201449380U CN201347368Y (en) | 2008-12-25 | 2008-12-25 | Seawater desalination evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201347368Y true CN201347368Y (en) | 2009-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201449380U Expired - Lifetime CN201347368Y (en) | 2008-12-25 | 2008-12-25 | Seawater desalination evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201347368Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276004A (en) * | 2011-06-30 | 2011-12-14 | 哈尔滨汽轮机厂辅机工程有限公司 | Seawater desalination evaporator with seawater reflux member |
| CN102336447A (en) * | 2011-06-27 | 2012-02-01 | 哈尔滨汽轮机厂辅机工程有限公司 | Seawater desalination primary evaporator using ferritic stainless steel tubes |
| CN103787437A (en) * | 2014-02-19 | 2014-05-14 | 陈达人 | Curtain-type evaporator |
| CN106673098A (en) * | 2016-11-02 | 2017-05-17 | 天津大学 | Mounting method for uniform liquid distribution structure of transverse tube falling film evaporator |
| CN110327644A (en) * | 2019-07-22 | 2019-10-15 | 大连理工大学 | A kind of energy-saving horizontal pipe falling-film evaporating condenser |
-
2008
- 2008-12-25 CN CNU2008201449380U patent/CN201347368Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102336447A (en) * | 2011-06-27 | 2012-02-01 | 哈尔滨汽轮机厂辅机工程有限公司 | Seawater desalination primary evaporator using ferritic stainless steel tubes |
| CN102276004A (en) * | 2011-06-30 | 2011-12-14 | 哈尔滨汽轮机厂辅机工程有限公司 | Seawater desalination evaporator with seawater reflux member |
| CN103787437A (en) * | 2014-02-19 | 2014-05-14 | 陈达人 | Curtain-type evaporator |
| CN103787437B (en) * | 2014-02-19 | 2015-07-22 | 陈达人 | Curtain-type evaporator |
| WO2015124061A1 (en) * | 2014-02-19 | 2015-08-27 | 陈达人 | Curtain-type evaporator |
| CN106673098A (en) * | 2016-11-02 | 2017-05-17 | 天津大学 | Mounting method for uniform liquid distribution structure of transverse tube falling film evaporator |
| CN110327644A (en) * | 2019-07-22 | 2019-10-15 | 大连理工大学 | A kind of energy-saving horizontal pipe falling-film evaporating condenser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160612 Address after: 300350 Tianjin city Jinnan District Shuangqiao town Xinxin Road No. 9 Patentee after: Tianjin Baocheng Machinery Manufacturing Co., Ltd. Address before: 300457 villa No. 11, 10 Avenue, Second Street, Tianjin economic and Technological Development Zone Patentee before: Binhai Environmental Protection Equipment (Tianjin) Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091118 |