CN215756523U - Seawater desalination evaporation plant - Google Patents
Seawater desalination evaporation plant Download PDFInfo
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- CN215756523U CN215756523U CN202121080383.XU CN202121080383U CN215756523U CN 215756523 U CN215756523 U CN 215756523U CN 202121080383 U CN202121080383 U CN 202121080383U CN 215756523 U CN215756523 U CN 215756523U
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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 present disclosure relates to a seawater desalination evaporation plant. The shell of the device comprises an upper shell and a lower shell which are hermetically connected, the advantages of a square device structure and a circular device structure are integrated, and the circular structure with the lower part provided with a lower convex arc-shaped bottom surface can ensure that the stress of equipment is good and the thickness of the equipment is reduced; the square structure at the upper part is convenient for the arrangement of a platform above the evaporation device, so that the seawater is easier to uniformly spray; the integral structure of the device can reduce the shell pass space of the seawater desalination equipment and increase the utilization rate of the shell pass space of unit volume; and the device can reduce the equipment investment of the seawater desalination evaporation plant and reduce the occupied area of the equipment.
Description
Technical Field
The disclosure relates to the technical field of seawater desalination, in particular to a seawater desalination evaporation plant.
Background
In the global water resources, the seawater resource accounts for about 97%, the polar glacier water accounts for about 2%, and the available fresh water accounts for only 1%. The global fresh water resources are deficient, and the distribution of the superposed areas is uneven, so that the water shortage situation around the world becomes more and more serious.
China is a country with serious shortage of water resources, the total amount of water resources is about 28000 billionths of cubic meters, is located in the sixth world after Brazil, Russia, Canada, the United states and Indonesia, occupies 1/4 with the average amount of people being the world average level, and is listed as one of the most water-poor countries in the world by United nations. In addition, the spatial and temporal distribution and population distribution of fresh water resources in China are not uniform, and the social development is unbalanced, so that the fresh water resources in some cities are seriously deficient. On the other hand, China is also a genuine ocean, the coastline of the island is about 1.4 kilometers, the coastline of the continental land is about 1.8 kilometers, the total length of the coastline is about 3.2 kilometers, and the seawater resources are extremely abundant. Therefore, ocean water resources accounting for 97% of the total water storage in the world are effectively utilized, the seawater utilization technology is vigorously developed, and the method is an important measure for solving the shortage of fresh water resources in coastal areas and the flourishing of coastal economy. Especially, petrochemical enterprises developed and constructed coastal should effectively utilize seawater resources to solve the water use problem of enterprises under the condition of shortage of fresh water resources and abundance of seawater resources. At present, as for the utilization of seawater resources, the main utilization direction of petrochemical plants is to utilize seawater to prepare fresh water, so as to meet the water demand of the petrochemical plants.
Currently, mainstream seawater desalination technologies include thermal seawater desalination, membrane seawater desalination, and the like. The heat method seawater desalination process has great advantages because the waste heat generated in the petrochemical plant can be utilized to prepare fresh water. The fresh water consumption of the large petrochemical plant is increased more and more at present, so that the scale of seawater desalination is correspondingly increased gradually, the mainstream hot method seawater desalination technology in the market at present mainly adopts low-temperature multi-effect evaporation, the large-scale low-temperature multi-effect evaporation seawater desalination evaporator structure mostly adopts a square or round shape, the stress of the evaporator with the square structure is poor, the pipe consumption can be increased, the stress of the evaporator with the round structure is good, and the utilization rate of the internal space, particularly the upper space, is relatively low.
SUMMERY OF THE UTILITY MODEL
The seawater desalination evaporation plant has the advantages of small occupied area, low material consumption and uniform seawater distribution in the evaporation plant.
In order to achieve the above object, the present disclosure provides a seawater desalination evaporation plant, comprising multiple-effect evaporators which are sequentially communicated, each effect evaporator comprising: the seawater distributor comprises a shell, a seawater ejector, a seawater distributor and an evaporation tube bundle; the shell comprises an upper shell and a lower shell which are connected in a sealing manner, the horizontal section of the upper shell is rectangular, and the lower shell comprises a downward convex arc-shaped bottom surface; the seawater ejector, the seawater distributor and the evaporation tube bundle are sequentially arranged in the shell of the evaporator at intervals from top to bottom; the evaporation tube bank is followed the central axis direction of casing from top to bottom arrange in inside being used for making the sea water is in from top to bottom carry out falling film evaporation on the evaporation tube bank outer wall.
Optionally, each evaporator comprises a plurality of seawater ejectors arranged in the same plane, wherein the plurality of seawater ejectors are arranged in a regular triangle or a regular quadrangle; the number and the positions of the seawater ejectors correspond to those of the seawater distributors.
Optionally, the evaporator tube bundle in each evaporator effect extends in a horizontal direction; each effect evaporator comprises a plurality of evaporator tube bundle units which are arranged in the shell at intervals along the vertical direction; each evaporation tube bundle unit comprises a plurality of evaporation tube bundles which are arranged in the same horizontal plane at intervals, and intervals are reserved between the evaporation tube bundles and the side wall and the bottom wall of the shell; each effect of evaporator is provided with a steam outlet, a steam inlet, a raw material seawater inlet, a condensed water outlet and a strong brine outlet, and the steam outlet and the strong brine outlet are only communicated with the shell pass space of the shell; the steam inlet and the condensed water outlet are only communicated with the tube side space of the evaporation tube bundle; and the steam outlet of the former evaporator is communicated with the steam inlet of the latter evaporator through a communicating pipeline.
Optionally, the seawater distributor and the seawater ejector respectively correspond to the number and the positions of the evaporation tube bundles in the evaporation tube bundle unit at the uppermost layer; the seawater distributor is a single-layer distribution pipe or a double-layer distribution pipe.
Optionally, in each evaporation tube bundle unit, the inlet of the evaporation tube bundle is communicated with the steam inlet on the shell, and the outlet of the evaporation tube bundle is communicated with the condensed water outlet of the shell.
Optionally, the space S1 between the adjacent evaporator tube bundle units is 30mm to 50mm in the vertical direction; in each evaporation tube bundle unit, the interval S2 between the adjacent evaporation tube bundles is 400-800 mm along the horizontal direction.
Optionally, in the upper shell, in each evaporator tube bundle of each evaporator tube bundle unit, the space S3 between adjacent evaporator tubes is 20mm to 50 mm; in the lower shell, in each evaporation tube bundle of each evaporation tube bundle unit, the space S4 between adjacent evaporation tubes is 20-50 mm; the pipe diameter of the evaporating pipe is 15 mm-30 mm.
Optionally, the spray area of each seawater ejector is circular or other shape.
Optionally, between two adjacent effect evaporators, the strong brine outlet of the former effect evaporator is communicated with the raw seawater inlet of the latter effect evaporator.
Optionally, a communication pipeline is arranged between each two adjacent evaporators, between the steam outlet of the previous evaporator and the steam inlet of the next evaporator, and two ends of the communication pipeline are respectively connected with the steam outlet of the previous evaporator and the steam inlet of the next evaporator in a sealing manner through Y-shaped sealing rings.
According to the technical scheme, the seawater desalination evaporation device comprises an upper shell and a lower shell which are hermetically connected, wherein the horizontal section of the upper shell is rectangular, the lower shell comprises a downward convex arc-shaped bottom surface, the seawater desalination evaporation device integrates the advantages of a square structure and a circular structure, the circular structure with the downward convex arc-shaped bottom surface at the lower part can enable the device to be well stressed, and the required thickness of the equipment shell is reduced; the square structure at the upper part facilitates the arrangement of a platform at the upper part of the device (such as the arrangement of a seawater ejector, a seawater distributor and the like), so that the seawater is easier to uniformly spray; the integral structure of the device can also reduce the shell pass space of the seawater desalination equipment, and simultaneously increase the utilization rate of the shell pass space of unit volume; and the device can reduce the equipment investment of the seawater desalination evaporation plant and reduce the occupied area of the equipment.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic cross-sectional view of an evaporation apparatus for desalinating seawater according to an embodiment of the present disclosure;
FIG. 2 is a schematic side view of an embodiment of a seawater desalination evaporation plant according to the present disclosure;
FIG. 3 is a schematic diagram of a spray surface of a seawater ejector of the seawater desalination evaporation plant provided by an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of an arrangement of seawater ejectors provided in one embodiment of the present disclosure;
FIG. 5 is a schematic diagram of an arrangement of seawater ejectors provided in one embodiment of the present disclosure;
FIG. 6 is a schematic cross-sectional view of a Y-ring seal used in one embodiment of the present disclosure;
fig. 7 is a schematic cross-sectional view of a seawater desalination evaporation plant according to an embodiment of the present disclosure.
Description of the reference numerals
1-upper shell, 2-seawater ejector, 3-seawater distributor, 4-evaporation tube bundle, 5-evaporation tube bundle unit, 6-evaporator, 7-lower shell, 8-evaporation tube
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, the use of directional words such as "upper, lower, top and bottom" generally refers to upper and lower, top and bottom, respectively, of the device in its normal use condition. "inner and outer" are with respect to the device profile.
Referring to fig. 1, the present disclosure provides a seawater desalination evaporation plant, including the multiple effect evaporator 6 that communicates in proper order, every effect evaporator 6 includes: the seawater distributor comprises a shell, a seawater ejector 2, a seawater distributor 3 and an evaporation tube bundle;
the shell comprises an upper shell 1 and a lower shell 7 which are connected in a sealing manner, the horizontal section of the upper shell 1 is rectangular, and the lower shell 7 comprises a downward convex arc-shaped bottom surface;
the seawater ejector 2, the seawater distributor 3 and the evaporation tube bundle are sequentially arranged in the shell of the evaporator 6 at intervals from top to bottom; the evaporation tube bundle is arranged inside the shell from top to bottom along the direction of the central axis of the shell and is used for enabling seawater to perform falling film evaporation on the outer wall of the evaporation tube bundle from top to bottom.
The utility model provides a seawater desalination evaporation plant, the shell of which comprises an upper shell and a lower shell which are hermetically connected, the advantages of a square device structure and a circular device structure are integrated, and the circular structure with a lower convex arc bottom surface can ensure that the equipment is well stressed and the thickness of the equipment is reduced; the square structure at the upper part facilitates the arrangement of a platform above the evaporation device, such as a seawater ejector, a seawater distributor and the like, so that the seawater is easier to uniformly spray; the integral structure of the device can reduce the shell pass space of the seawater desalination equipment and increase the utilization rate of the shell pass space of unit volume; and the device can reduce the equipment investment of the seawater desalination evaporation plant and reduce the occupied area of the equipment.
In one embodiment, at the junction of the upper shell and the lower shell of each effect of the evaporator, the horizontal cross section of the upper shell is square, the horizontal cross section of the lower shell is circular, and the horizontal cross section of the upper shell is tangential to the horizontal cross section of the lower shell. Further, the upper and lower housings may be hermetically sealed by conventional means in the art, such as welding.
In a specific embodiment, the upper shell and the lower shell of the present disclosure may be made of carbon steel, and the inner wall of the carbon steel is coated with an anticorrosive material, or may be made of other materials resistant to seawater corrosion.
In one embodiment, the spray area of each seawater jet 2 is circular or other shape. In a preferred embodiment, referring to fig. 2, the spray area of each seawater jet 2 is circular, the diameter of the circular spray area being denoted by D.
In one embodiment, each evaporator 6 comprises a plurality of seawater ejectors 2 arranged in the same plane, wherein the plurality of seawater ejectors 2 are arranged in a regular triangle or a regular quadrilateral. In one embodiment, referring to fig. 4, the arrangement of the seawater ejectors is illustrated by taking three seawater ejectors as an example, and the three seawater ejectors are arranged in a regular triangle. In another embodiment, referring to fig. 5, an arrangement of the seawater ejectors is described by taking four seawater ejectors as an example, and the four seawater ejectors are arranged in a regular quadrangle. The arrangement mode of the seawater ejector provided by the disclosure enables the seawater ejection to be more uniform, and the number of the seawater ejectors in a unit spraying area is effectively reduced.
In one embodiment, the number and location of seawater spargers 2 corresponds to the seawater distributors 3 per effect of the vaporizers. Specifically, referring to fig. 1, a seawater injector is correspondingly arranged above each seawater distributor, which is beneficial to uniformly spraying seawater and improving the seawater evaporation and desalination effect.
In one embodiment, referring to FIG. 1, the evaporator tube bundles within each evaporator effect 6 extend in a horizontal direction;
each effect of evaporator 6 comprises a plurality of evaporator tube bundle units 5, and the plurality of evaporator tube bundle units 5 are arranged in the shell at intervals along the vertical direction; each evaporation tube bundle unit 5 comprises a plurality of evaporation tube bundles 4 which are arranged in the same horizontal plane at intervals, and intervals are arranged between the evaporation tube bundles 4 and the side wall and the bottom wall of the shell;
each effect of evaporator 6 is provided with a steam outlet, a steam inlet, a raw material seawater inlet, a condensed water outlet and a strong brine outlet, and the steam outlet and the strong brine outlet are only communicated with the shell pass space of the shell; the steam inlet and the condensed water outlet are only communicated with the tube pass space of the evaporation tube bundle; and the steam outlet of the former evaporator is communicated with the steam inlet of the latter evaporator through a communicating pipeline. In the embodiment, a plurality of evaporation tube bundle units with intervals are arranged in the evaporator, so that the seawater falling film desalination evaporation efficiency can be improved; and the steam obtained by evaporating the seawater of the previous effect evaporator is introduced into the tube side space of the next effect evaporator, and the steam obtained by the previous effect evaporator is further used as the heat source of the next effect evaporator, so that the overall waste heat utilization rate of the device is improved.
In one embodiment, referring to fig. 1, the evaporator tube bundle is divided into an upper layer evaporator tube bundle unit, a middle layer evaporator tube bundle unit and a lower layer evaporator tube bundle unit from top to bottom in the vertical direction; and in each evaporation tube bundle unit, a plurality of evaporation tube bundles with intervals are arranged along the horizontal direction, so that the heat exchange efficiency between the seawater outside the tube bundles and the heat source inside the tube can be improved.
In a more specific embodiment, the evaporation tube bundle in the upper evaporation tube bundle unit can be made of titanium material; the evaporation tube bundles in the middle-layer evaporation tube bundle unit and the lower-layer evaporation tube bundle unit can be made of aluminum alloy materials or other materials with good heat transfer performance.
In one embodiment, referring to fig. 1, the seawater distributor 3 and the seawater ejector 2 correspond to the number and position of the evaporation tube bundles in the uppermost evaporation tube bundle unit 5, respectively. In one embodiment, as shown in fig. 1, 5 evaporation tube bundles are arranged on the uppermost layer in the shell along the horizontal direction, and a seawater distributor and a seawater injector are correspondingly arranged above each evaporation tube bundle, so that the seawater injection can be more uniform.
In one embodiment, the seawater distributor may be a single-layer distributor pipe or a double-layer distributor pipe.
In one embodiment, in each bundle unit 5, the inlet of each bundle 4 is in communication with the steam inlet of the shell and the outlet of each bundle is in communication with the condensate outlet of the shell.
In one embodiment, as shown in FIG. 7, the spacing S1 between adjacent evaporator tube bundle units 5 is 30mm to 50mm in the vertical direction; in each of the tube bundle units 5, the space S2 between the adjacent rows of tube bundles 4 in the horizontal direction is 400mm to 800 mm. This embodiment can further improve the falling film evaporation effect of seawater in the evaporator.
In one embodiment, as shown in fig. 7, in the upper shell 1, in each evaporation tube bundle 4 of each evaporation tube bundle unit 5, the space S3 between adjacent evaporation tubes 8 is 20mm to 50 mm; in the lower shell 7, the space S4 between the adjacent evaporation tubes 8 in each evaporation tube bundle 4 of each evaporation tube bundle unit 5 is 20mm to 50 mm. This embodiment can further improve the falling film evaporation effect of seawater in the evaporator.
In one embodiment, the diameter of the evaporating tube is 15 mm-30 mm.
In one embodiment, between two adjacent evaporators 6, the strong brine outlet of the former evaporator is communicated with the raw seawater inlet of the latter evaporator. The present disclosure can also introduce strong brine obtained after the evaporation of the seawater in the former effect into the evaporator in the latter effect to continue the falling film evaporation, thereby further improving the seawater desalination effect.
In one embodiment, a communication pipeline is arranged between every two adjacent evaporator 6, between a steam outlet of a previous evaporator and a steam inlet of a next evaporator, and two ends of the communication pipeline are respectively in sealing connection with the steam outlet of the previous evaporator and the steam inlet of the next evaporator through Y-shaped sealing rings. The Y-shaped sealing ring can effectively keep the sealing performance of the seawater desalination equipment during the effective connection, prevent a large amount of air from leaking into the equipment and maintain the normal operation of the equipment.
As shown in fig. 6, the Y-shaped seal ring refers to a seal ring having a Y-shaped cross-section, which is conventionally selected in the art.
In one embodiment, referring to fig. 1-7, a seawater desalination evaporation plant comprises: the multi-effect evaporator 6 that communicates in proper order, every effect evaporator 6 includes: each effect evaporator 6 includes: a shell, a seawater ejector 2, a seawater distributor 3 and an evaporator tube bundle 4;
the shell comprises an upper shell 1 and a lower shell 7 which are connected in a sealing manner, the horizontal section of the upper shell 1 is rectangular, and the lower shell 7 comprises a downward convex arc-shaped bottom surface;
the seawater ejector 2, the seawater distributor 3 and the evaporation tube bundle are sequentially arranged in the shell of the evaporator 6 at intervals from top to bottom; the evaporation tube bundle 4 is arranged in the shell from top to bottom along the central axis direction of the shell and is used for enabling seawater to perform falling film evaporation on the outer wall of the evaporation tube bundle 4 from top to bottom;
each effect of evaporator 6 comprises a plurality of seawater ejectors 2 arranged in the same plane, wherein the plurality of seawater ejectors 2 are arranged in a regular triangle or a regular quadrangle; the number and the positions of the seawater ejectors 2 correspond to those of the seawater distributors 3;
wherein, the evaporator tube bundle in each evaporator 6 extends along the horizontal direction;
each effect of evaporator 6 comprises a plurality of evaporator tube bundle units 5, and the plurality of evaporator tube bundle units 5 are arranged in the shell at intervals along the vertical direction; each evaporation tube bundle unit 5 comprises a plurality of evaporation tube bundles 4 which are arranged in the same horizontal plane at intervals, and intervals are arranged between the evaporation tube bundles 4 and the side wall and the bottom wall of the shell;
each effect of evaporator 6 is provided with a steam outlet, a steam inlet, a raw material seawater inlet, a condensed water outlet and a strong brine outlet, and the steam outlet and the strong brine outlet are only communicated with the shell pass space of the shell; the steam inlet and the condensed water outlet are only communicated with the tube pass space of the evaporation tube bundle; and the steam outlet of the former evaporator is communicated with the steam inlet of the latter evaporator through a communicating pipeline;
the seawater distributor 3 and the seawater ejector 2 correspond to the number and the positions of the evaporation tube bundles in the evaporation tube bundle unit 5 at the uppermost layer respectively;
in each evaporation tube bundle unit 5, an inlet of an evaporation tube bundle 4 is communicated with a steam inlet on the shell, and an outlet of each evaporation tube bundle is communicated with a condensed water outlet of the shell;
specifically, as shown in fig. 7, two (two rows shown in the sectional view) evaporator tube bundle units 5 are formed in the upper shell 1 in the vertical direction; and within each evaporation tube bundle unit 5, 5 evaporation tube bundles 4 are formed in the horizontal direction (shown as 5 rows of evaporation tube bundles 4 in the sectional view); in the lower shell 7, one (shown in cross-section as a row) evaporation tube bundle unit 5 is formed; and within each evaporation tube bundle unit 5, 5 evaporation tube bundles 4 are formed in the horizontal direction (shown as 5 rows of evaporation tube bundles 4 in the sectional view); in the upper shell 1 and the lower shell 7, the interval S1 between the adjacent evaporation tube bundle units 5 is 30mm to 50mm in the vertical direction; in each evaporation tube bundle unit 5, along the horizontal direction, the space S2 between each adjacent row of evaporation tube bundles 4 is 400-800 mm; wherein, in the upper shell 1, in each evaporation tube bundle 4 of each evaporation tube bundle unit 5, the space S3 between the adjacent evaporation tubes 8 is 20 mm-50 mm; in the lower shell 7, in each evaporation tube bundle 4 of each evaporation tube bundle unit 5, the space S4 between the adjacent evaporation tubes 8 is 20 mm-50 mm; wherein the pipe diameter of the evaporating pipe is 15 mm-30 mm;
wherein, the spraying area of each seawater ejector 2 is circular;
wherein, between two adjacent effect evaporators 6, the strong brine outlet of the former effect evaporator is communicated with the raw material seawater inlet of the latter effect evaporator;
wherein, between every two adjacent effect evaporimeters 6, be equipped with the intercommunication pipeline between the steam outlet of preceding effect evaporimeter and the steam inlet of following effect evaporimeter, the both ends of intercommunication pipeline pass through Y shape sealing washer sealing connection with the steam outlet of preceding effect evaporimeter, the steam inlet of following effect evaporimeter respectively.
The working process of the seawater desalination evaporation plant provided by the above embodiment of the present disclosure includes:
in the first-effect evaporator, seawater to be evaporated and desalinated is introduced into the first-effect evaporator through a raw material seawater inlet on the shell, the seawater is sprayed and atomized through a seawater ejector, and the atomized seawater enters a seawater distributor to be uniformly distributed; and introducing a heat source substance (such as hot water or steam) into the tube side space of the evaporator tube bundle in the shell through a steam inlet on the shell;
the seawater flows through the seawater distributor to reach the outer wall of the evaporation tube bundle and exchanges heat with a heat source in the tube pass space, so that the seawater flows on the outer wall of the evaporation tube bundle 4 from top to bottom in a falling film manner, the seawater on the outer side of the tube wall is subjected to flash evaporation to form steam, the steam is led out from a steam outlet on the shell through a communicating pipeline and is led into a next-effect evaporator through a steam inlet of the next-effect evaporator, and the residual seawater is led out of the shell through strong brine at the bottom of the shell;
in the evaporators from the second effect to the last effect, the steam of the evaporator in the previous effect is introduced into the steam inlet of the evaporator in the next effect and enters the tube side space of the heat exchange tube bundle to be used as a heat source substance for exchanging heat with the seawater, and the condensed water obtained by heat exchange in the tube side space is led out of the shell through a condensed water outlet on the shell;
and concentrated brine obtained by all evaporators in the seawater desalination evaporation device is collected and then discharged out of the seawater desalination evaporation device, and condensed water obtained by all evaporator evaporation tube bundles is collected and then led out of the seawater desalination evaporation device.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. The utility model provides a sea water desalination evaporation plant, its characterized in that, is including the multi-effect evaporator (6) that communicate in proper order, and every effect evaporator (6) includes: the seawater desalination device comprises a shell, a seawater ejector (2), a seawater distributor (3) and an evaporation tube bundle (4);
the shell comprises an upper shell (1) and a lower shell (7) which are connected in a sealing manner, the horizontal section of the upper shell (1) is rectangular, and the lower shell (7) comprises a downward convex arc-shaped bottom surface;
the seawater ejector (2), the seawater distributor (3) and the evaporation tube bundle are sequentially arranged in the shell of the evaporator (6) at intervals from top to bottom; evaporating tube bank (4) are followed the central axis direction of casing from top to bottom arrange in inside being used for making the sea water be in evaporating tube bank (4) carry out the falling film evaporation from top to bottom on the outer wall.
2. The seawater desalination evaporation plant according to claim 1, wherein each evaporator (6) comprises a plurality of seawater ejectors (2) arranged in the same plane, wherein the plurality of seawater ejectors (2) are arranged in a regular triangle or a regular quadrangle; the number and the positions of the seawater ejectors (2) correspond to those of the seawater distributors (3).
3. The seawater desalination evaporation plant of claim 1, wherein the evaporator tube bundle in each evaporator effect (6) extends in a horizontal direction;
each effect evaporator (6) comprises a plurality of evaporator tube bundle units (5), and the evaporator tube bundle units (5) are arranged in the shell at intervals along the vertical direction; and each evaporation tube bundle unit (5) comprises a plurality of evaporation tube bundles (4) which are arranged at intervals in the same horizontal plane, and the evaporation tube bundles (4) are spaced from the side wall and the bottom wall of the shell;
each effect of evaporator (6) is provided with a steam outlet, a steam inlet, a raw material seawater inlet, a condensed water outlet and a strong brine outlet, and the steam outlet and the strong brine outlet are only communicated with the shell pass space of the shell; the steam inlet and the condensed water outlet are only communicated with the tube side space of the evaporation tube bundle; and the steam outlet of the former evaporator is communicated with the steam inlet of the latter evaporator through a communicating pipeline.
4. The seawater desalination evaporation plant according to claim 3, wherein the seawater distributor (3) and the seawater ejector (2) correspond to the number and position of the evaporation tube bundles in the uppermost evaporation tube bundle unit (5), respectively;
the seawater distributor is a single-layer distribution pipe or a double-layer distribution pipe.
5. The seawater desalination evaporation plant of claim 3, wherein in each of the evaporation tube bundle units (5), the inlet of the evaporation tube bundle (4) is communicated with the steam inlet on the shell, and the outlet of each evaporation tube bundle is communicated with the condensed water outlet of the shell.
6. The seawater desalination evaporation plant according to claim 3, wherein, in the vertical direction, the space S1 between the adjacent evaporation tube bundle units (5) is 30 mm-50 mm; in each evaporation tube bundle unit (5), the interval S2 between the adjacent evaporation tube bundles (4) along the horizontal direction is 400-800 mm.
7. The seawater desalination evaporation plant according to claim 3, wherein, in each evaporator tube bundle (4) of each evaporator tube bundle unit (5) in the upper shell (1), the space S3 between the adjacent evaporator tubes (8) is 20mm to 50 mm; in the lower shell (7), the space S4 between the adjacent evaporation tubes (8) in each evaporation tube bundle (4) of each evaporation tube bundle unit (5) is 20-50 mm; the pipe diameter of the evaporation pipe (8) is 15 mm-30 mm.
8. The seawater desalination evaporation plant of claim 1, wherein the spraying area of each seawater ejector (2) is circular.
9. The seawater desalination evaporation plant of claim 3, wherein between two adjacent effect evaporators (6), the strong brine outlet of the former effect evaporator is communicated with the raw seawater inlet of the latter effect evaporator.
10. The seawater desalination evaporation plant according to claim 3, wherein a communication pipeline is arranged between the evaporator (6) of each two adjacent effects and between the steam outlet of the previous effect evaporator and the steam inlet of the next effect evaporator, and two ends of the communication pipeline are respectively in sealing connection with the steam outlet of the previous effect evaporator and the steam inlet of the next effect evaporator through Y-shaped sealing rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202121080383.XU CN215756523U (en) | 2021-05-19 | 2021-05-19 | Seawater desalination evaporation plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121080383.XU CN215756523U (en) | 2021-05-19 | 2021-05-19 | Seawater desalination evaporation plant |
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| CN215756523U true CN215756523U (en) | 2022-02-08 |
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