Source water device for diluting seawater salinity by using rainwater

Abstract

The utility model discloses a source water device for diluting seawater salinity by using rainwater, which comprises a water tank for a seawater desalination device, a seawater inlet pipe extending into the sea is connected onto the water tank, and a seawater pump is mounted on the seawater inlet pipe; a conductivity meter is mounted in the water tank; the first output end of the rainwater main inlet pipe is connected with a sea communication branch pipe, and the second output end of the rainwater main inlet pipe is connected with the water tank through a water tank branch pipe; a first electric valve is mounted on the sea communication branch pipe; a Y-shaped filter and a second electric valve are mounted on the water tank branch pipe; rainwater is drained into the water tank, the salinity of seawater in the water tank is reduced, and therefore the seawater desalination cost is reduced, meanwhile, the salinity of the seawater in the water tank is monitored in real time through the conductivity meter, when the salinity of the seawater in the water tank is smaller than a set threshold value, the first electric valve and the second electric valve are controlled to be switched, and rainwater is prevented from continuously flowing into the water tank; therefore, the desalination efficiency reduction caused by too low seawater concentration is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of seawater desalination, in particular to a source water device which utilizes rainwater to dilute the salinity of seawater. Background Art

[0002] The water used for life and production at offshore converter stations is generally produced by extracting seawater and then desalinating it. The existing general seawater source water device consists of a seawater pump group, a water tank, a gate component, a liquid level meter, etc. After the seawater pump extracts the seawater, it is directly stored in the source water tank. Subsequently, the seawater desalination device extracts it from the source water tank to make fresh water. The current mainstream seawater desalination device is the reverse osmosis method, and the cost of this method increases with the increase of seawater salinity.

[0003] At present, rainwater on the offshore converter station platform flows into the sea through downpipes and is not utilized.

[0004] For example, a Chinese patent with publication number CN109133407A discloses a seawater desalination system for an island plant factory. By designing a seawater desalination system and a rainwater collection and purification system, the seawater resources and rainwater that cannot be directly used on the island can be converted into freshwater resources required by the plant factory.

[0005] However, the existing technology for utilizing rainwater usually converts rainwater into fresh water. The space on the offshore converter station is limited and the amount of rainwater that can be collected is relatively small. It is very cost-effective to open a new line specifically for rainwater purification. Utility Model Content

[0006] The utility model aims to provide a source water device for diluting the salinity of seawater by using rainwater, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A source water device for diluting the salinity of seawater using rainwater, comprising a water tank for a seawater desalination device, the water tank being connected to a seawater inlet pipe extending into the sea, and a seawater pump being installed on the seawater inlet pipe;

[0009] A conductivity meter is installed in the water tank;

[0010] A main rainwater inlet pipe, wherein a first output end of the main rainwater inlet pipe is connected to a sea branch pipe, and a second output end of the main rainwater inlet pipe is connected to a water tank through a water tank branch pipe;

[0011] A first electric valve is installed on the sea branch pipe;

[0012] A Y-type filter and a second electric valve are installed on the water tank branch pipe;

[0013] A control cabinet, wherein the conductivity meter, the seawater pump, the first electric valve and the second electric valve are all electrically connected to the control cabinet.

[0014] Preferably, a first manual gate valve is installed on the seawater inlet pipe, a second manual gate valve is installed on the sea branch pipe, and a third manual gate valve is installed on the water tank branch pipe.

[0015] Preferably, an overflow pipe is connected to the upper portion of the water tank, and a first flow meter is installed on the overflow pipe.

[0016] Preferably, a water level measuring device is installed in the water tank.

[0017] Preferably, a corrugated pipe is provided on the water tank branch pipe.

[0018] Preferably, the input end of the main rainwater inlet pipe is connected to one or more rainwater collecting branch pipes arranged in parallel, and a second flow meter is installed on one of the rainwater collecting branch pipes.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The utility model drains rainwater into a water tank, reduces the salinity of seawater in the water tank, and thus reduces the cost of seawater desalination. At the same time, the salinity of seawater in the water tank is monitored in real time by a conductivity meter. When the salinity of seawater in the water tank is less than a set threshold, the first electric valve and the second electric valve are controlled to switch, blocking rainwater from continuing to flow into the water tank, thereby avoiding a decrease in desalination efficiency due to too low seawater concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the utility model.

[0023] The reference numerals in the figure are as follows:

[0024] 1. Water tank; 11. Conductivity meter; 12. Water level measuring device; 2. Control cabinet; 3. Overflow pipe; 4. Seawater inlet pipe; 41. Seawater pump; 42. First manual gate valve; 5. Rainwater main inlet pipe; 51. Rainwater collection branch pipe; 52. Rainwater inlet; 53. Second flow meter; 6. Sea branch pipe; 61. First electric valve; 62. Second manual gate valve; 7. Water tank branch pipe; 71. Y-type filter; 72. Second electric valve; 73. Third manual gate valve; 74. Bellows. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example:

[0027] A source water device that uses rainwater to dilute the salinity of seawater, such as Figure 1 As shown, a seawater desalination device is installed on the offshore converter station. The seawater desalination device uses a reverse osmosis method to produce fresh water. The water tank 1 is a part of the seawater desalination device 1 and is used to store seawater to be desalinated.

[0028] One end of the seawater inlet pipe 4 extends into the sea, and the other end is connected to the first water inlet end of the water tank 1 ; a seawater pump 41 and a first manual gate valve 42 are installed on the seawater inlet pipe 4 .

[0029] The input end of the rainwater main inlet pipe 5 is connected to multiple groups of rainwater collecting branch pipes 51, which are arranged in parallel. The rainwater inlet 52 at the water inlet end of the rainwater collecting branch pipe 51 is arranged on the upper surface of the offshore converter station; a second flow meter 53 is installed on one of the rainwater collecting branch pipes 51. The first output end of the rainwater main inlet pipe 5 is connected to the sea branch pipe 6, and the first electric valve 61 and the second manual gate valve 62 are installed on the sea branch pipe 6; the second output end of the rainwater main inlet pipe 5 is connected to the second water inlet end of the water tank 1 through the water tank branch pipe 7, and the water tank branch pipe 7 is installed with a Y-type filter 71, a second electric valve 72, a third manual gate valve 73 and a bellows 74.

[0030] A conductivity meter 11 and a water level measuring device 12 (liquid level sensor) are installed in the water tank 1. An overflow pipe 3 is connected to the upper part of the water tank 1, and a first flow meter is installed on the overflow pipe 3.

[0031] The first flow meter, the second flow meter 53 , the control cabinet 2 , the seawater pump 41 , the first electric valve 61 , the second electric valve 72 , the conductivity meter 11 and the water level measuring device 12 are all electrically connected to the control cabinet 2 , and the operation of each device is controlled by the control cabinet 2 .

[0032] The seawater pump 41 is a long-axis seawater pump, and the pump unit is equipped with a gate, a filter, and a marine growth prevention device.

[0033] The main function of the bellows 74 is to compensate for pipeline misalignment.

[0034] The Y-type filter 71 is used to filter impurities in rainwater.

[0035] The space at the offshore converter station is limited and there is no extra space to install rainwater tanks to store rainwater, so rainwater that cannot be used immediately needs to be drained.

[0036] Working principle:

[0037] When the water level measuring device 12 detects that the water level in the water tank 1 is lower than the set minimum threshold, the control cabinet 2 controls the seawater pump 41 to transport seawater from the sea into the water tank 1 through the seawater inlet pipe 4, and stops when the water level measuring device 12 detects that the water level in the water tank 1 reaches the set maximum threshold.

[0038] The seawater in the water tank 1 is automatically discharged through the overflow pipe 3 , and the first flow meter in the overflow pipe 3 sends an alarm to the control cabinet 2 when detecting that seawater is discharged.

[0039] Rainwater on the upper surface of the offshore converter station flows into the rainwater collecting branch pipe 51 through the rainwater inlet 52. When the second flow meter 53 in the rainwater collecting branch pipe 51 detects that the flow rate is greater than the set threshold, it means that it is raining at this time. The rainwater in each rainwater collecting branch pipe 51 is collected and flows into the rainwater main inlet pipe 5.

[0040] The conductivity meter 11 is an existing product, which measures the conductivity in water to evaluate important parameters such as the purity and salinity of the water body. When the conductivity meter 11 detects that the salinity of the seawater in the water tank 1 is relatively high, it sends a signal to the control cabinet 2, and the control cabinet 2 controls the first electric valve 61 to close and the second electric valve 72 to open. At this time, the rainwater in the main rainwater inlet pipe 5 flows into the water tank 1 through the water tank branch pipe 7, thereby reducing the salinity of the seawater in the water tank 1. Reducing the salinity of seawater is conducive to reducing the desalination cost of the seawater desalination device.

[0041] When the conductivity meter 11 detects that the salinity of seawater in the water tank 1 is lower than the set minimum threshold, a signal is sent to the control cabinet 2, and the control cabinet 2 controls the first electric valve 61 to open and the second electric valve 72 to close. At this time, the rainwater in the main rainwater inlet pipe 5 is discharged into the sea through the sea branch pipe 6, thereby preventing the salinity of seawater in the water tank 1 from being too low and avoiding the decrease in desalination efficiency caused by the low salinity of seawater.

[0042] During use, all manual valves are in the open state, and during maintenance, all manual valves are closed.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A source water device for diluting the salinity of seawater using rainwater, comprising a water tank (1) for a seawater desalination device, the water tank (1) being connected to a seawater inlet pipe (4) extending into the sea, the seawater inlet pipe (4) being installed with a seawater pump (41), characterized in that: A conductivity meter (11) is installed in the water tank (1); A main rainwater inlet pipe (5), wherein a first output end of the main rainwater inlet pipe (5) is connected to a sea branch pipe (6), and a second output end of the main rainwater inlet pipe (5) is connected to a water tank (1) via a water tank branch pipe (7); A first electric valve (61) is installed on the sea branch pipe (6); The water tank branch pipe (7) is provided with a Y-type filter (71) and a second electric valve (72); The control cabinet (2) is electrically connected to the conductivity meter (11), the seawater pump (41), the first electric valve (61) and the second electric valve (72).

2. A source water device for diluting seawater salinity using rainwater according to claim 1, characterized in that: The seawater inlet pipe (4) is provided with a first manual gate valve (42), the sea branch pipe (6) is provided with a second manual gate valve (62), and the water tank branch pipe (7) is provided with a third manual gate valve (73).

3. The source water device for diluting seawater salinity by using rainwater according to claim 1, characterized in that: The upper part of the water tank (1) is connected to an overflow pipe (3), and a first flow meter is installed on the overflow pipe (3).

4. The source water device for diluting the salinity of seawater by using rainwater according to claim 1, characterized in that: A water level measuring device (12) is installed in the water tank (1).

5. The source water device for diluting the salinity of seawater by using rainwater according to claim 1, characterized in that: The water tank branch pipe (7) is provided with a bellows (74).

6. The source water device for diluting the salinity of seawater by using rainwater according to claim 1, characterized in that: The input end of the rainwater main inlet pipe (5) is connected to one or more rainwater collecting branch pipes (51) arranged in parallel, and a second flow meter (53) is installed on one of the rainwater collecting branch pipes (51).

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