Seawater taking device

Abstract

The invention provides a seawater taking device. The seawater taking device comprises a buffer well, a siphon water taking pipeline, a submersible pump or a submerged pump, a pump-out pipeline system and a buffer well liquid level monitor, two ends of the siphon water taking pipeline are respectively connected with the open water area and the buffer well, and the highest point is connected with the vacuum system; the submersible pump or the submerged pump is arranged in the buffer well; the buffer well liquid level monitor detects the water level of the buffer well and controls the submersible pump or the submerged pump to stop pumping water when the water level of the buffer well is lower than the lower limit of the water level of the water seal of the siphon water taking pipeline at the end of the buffer well, so that the liquid level in the buffer well can be kept, and it can be guaranteed that the water seal of the siphon water taking pipeline at the end of the buffer well is formed. For a high-tidal-range area, the problem of safe water taking of a small-flow water taking pump is solved, disturbance of seawater power to the pump, cables and pipelines is reduced, the power effect of tide on equipment is reduced, and the service life of the water taking pump, the cables and the pipelines can be prolonged.

Description

Technical Field

[0001] The invention relates to a seawater intake device, which can be applied to a small seawater desalination system or other systems which need to use seawater in a high tidal range area. Background Art

[0002] Small desalination systems take in small amounts of water and cannot afford the large civil engineering costs of large desalination plants to build solid and reliable facilities to draw water from the sea. However, they face the same adverse conditions as large tidal ranges and typhoons when drawing water from the sea, and must overcome these unfavorable conditions to obtain the required seawater.

[0003] Taking the coastal areas of China as an example, the tidal range between high tide and low tide in the coastal areas of Zhejiang is about 4.5 meters, and in Fujian it is about 5.5 meters. If a centrifugal pump is used to draw water, and the pump is arranged in a pump room with an elevation of about 0.5 meters, even if a pump with a suction range of 6 meters is used, it is difficult for the pump room to safely draw water 24 hours a day. On the other hand, the construction conditions for civil construction and water intake pump room construction on the coast with an elevation of about 0.5 meters are also very poor. Because this small water intake facility does not have a cofferdam, the sea water will splash onto the construction foundation when the tide rises, which is extremely inconvenient and difficult for civil construction. If measures such as cofferdams are set up, the cost will be too high.

[0004] If a submersible pump is directly placed in the open sea to extract seawater, first the pump must be placed in an area where seawater can be obtained at low tide. Without auxiliary facilities, it is difficult to position the submersible pump at the ideal water intake point. Due to the disturbance of tidal power on the submersible pump, the submersible pump is very easy to be damaged, especially in areas such as the coast of Zhejiang and Fujian, where the daily normal tides cause large deviations. The submersible pump may even be damaged by daily waves in less than a few days.

[0005] This type of submersible pump that directly draws water, the water supply pipes, cables and water pumps are difficult to withstand the severe weather of typhoons. Generally speaking, after a typhoon, the water pumps, cables and pipes will be damaged or blown away and need to be rearranged and installed. In this way, the water supply guarantee rate of this water supply plan is too low. For life or production that relies on seawater desalination, this is actually not a good choice.

[0006] The above technical solution, despite adopting various optimization measures and methods, is still difficult to construct in the early stage of construction, and it is also difficult to repair and maintain the water intake equipment after it is damaged or damaged by typhoons and other weather conditions. In short, this technical solution is difficult to obtain seawater in a continuous and stable manner. Summary of the invention

[0007] The purpose of the present invention is to provide a seawater intake method and seawater intake facility, which can solve the problem of safe water intake of small flow water intake pumps in areas with high tidal differences, reduce the disturbance of seawater power to pumps, cables and pipelines, reduce the dynamic effect of tides on equipment, and extend the service life of water intake pumps, cables and pipelines. To this end, the present invention adopts the following technical solutions: A seawater intake device, characterized in that it comprises a buffer well, a siphon water intake pipeline, a submersible pump or a submersible pump, a pump-out pipeline system, and a buffer well liquid level monitor; The two ends of the siphon water-suction pipeline are respectively connected to open water and a buffer well, and the highest point thereof is connected to a vacuum system; The submersible pump or submersible pump is arranged in the buffer well; The buffer well liquid level monitor detects the buffer well water level and controls the submersible pump or submersible pump to stop pumping water when the buffer well water level is lower than the lower limit of the water seal level of the siphon water intake pipe at the buffer well end, so as to maintain the liquid level in the buffer well to ensure the formation of a water seal at the buffer well end of the siphon water intake pipe.

[0008] On the basis of adopting the above technical solutions, the present invention may also adopt the following further technical solutions, or use these further technical solutions in combination: A vacuum tube is arranged at the highest point of the siphon water-suction pipeline, and the vacuum tube is connected to a vacuum system through a valve.

[0009] The pump out pipe system is connected to the water storage tank.

[0010] The deepest point of the buffer well is lower than the low tide level of the open water area, preferably 2-3 meters lower than the low tide level of the sea water.

[0011] The height of the highest point of the siphon water pipe from the lowest tide level is not greater than the height of the local atmospheric pressure water column; preferably, it is higher than the high tide level but not higher than 3 meters from the high tide level.

[0012] If the buffer well is a dry well with little or no water seepage, water can be added into the well to form water seals at both ends of the siphon water pipe, and the gas in the siphon water pipe is discharged by a vacuum system to fill the siphon water pipe with seawater. The siphon water pipe is used to continuously siphon seawater into the buffer well, and the submersible pump or submersible pump continuously pumps out the seawater in the well to keep its water level lower than that of the open water area.

[0013] If the water seepage of the buffer well is lower than the water output of the pump, one or more siphon water pipes are used to continuously siphon seawater into the buffer well.

[0014] The vacuum tube is provided with a vacuum degree monitor to control the start and stop of the vacuum system, maintain the vacuum degree at the highest point of the siphon water intake pipe, and connect the water body in the open water area and the water body in the buffer well through the siphon water intake pipe through atmospheric pressure.

[0015] Due to the adoption of the technical solution of the present invention, the invention has the following technical characteristics and technical effects: (1) A buffer well (pool) is set up on the shore, with the deepest point of the well being about 2-3 meters below the low tide level of seawater and the elevation of the water inlet pipe being about 3 meters above the high tide level. A submersible pump is placed in the buffer well to extract seawater, which effectively reduces, isolates and avoids the frequent and strong disturbance of tides on the submersible pump, cable and water intake pipe, greatly improves the operating conditions of the submersible pump and its auxiliary measures, and prolongs the life of the submersible pump and its supporting cables and water intake pipe fittings. In addition, there are better conditions for setting up a water level switch or water level detection probe to control the operation of the equipment. The construction and maintenance of the submersible pump are more practical and less costly than the water intake scheme of directly placing it 2-3 meters below the low tide level.

[0016] (2) Adopt the technical solution of coastal buffer well water intake, set up buffer well low liquid level or water level detection probe, the water intake process can be monitored, monitored and controlled. Effectively assist in monitoring the water intake of the vacuum siphon water pipe, protect the submersible pump from being exhausted, and ensure the long-term, stable and efficient operation of the seawater intake submersible pump.

[0017] (3) Use vacuum siphon pipes to connect the sea and buffer wells, and draw seawater into the buffer wells through vacuum siphons, which greatly improves the reliability of water extraction. Siphon pipes use seawater corrosion-resistant metal pipes to replace submersible pumps to resist typhoons. The safety and stability are much better than submersible pumps. If two or more pipes are installed, the reliability of water extraction can be greatly improved and guaranteed. Seawater corrosion-resistant metal pipes without cables are put into the sea to extract water, as long as their suction point is 2-3 meters below the low tide level, which is easier to construct than seawater pumps.

[0018] (4) Adopt the technical solution of coastal buffer well water intake, install buffer well low liquid level or water level detection probe, effectively assist in monitoring the water intake of vacuum siphon water pipe, protect the submersible pump from being drained, and ensure the long-term, stable and efficient operation of the seawater intake submersible pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an implementation of the seawater intake device of the present invention: a longitudinal cross-sectional view of the seawater intake device. Implementation

[0020] Referring to the accompanying drawings, the present invention provides a seawater intake device, which comprises a buffer well 1 , a siphon water intake pipeline 2 , a submersible pump 3 , a pump-out pipeline system 40 , and a buffer well liquid level monitor 5 .

[0021] The two ends of the siphon water intake pipe 2 are connected to the open water area and the buffer well 1 respectively, and the highest point thereof is connected to the vacuum system 6; a vacuum tube 60 is arranged at the highest point of the siphon water intake pipe 2, and the vacuum tube 60 is connected to the vacuum system through an electric valve 61, and the electric valve can be automatically controlled. The vacuum tube 60 is provided with a vacuum degree monitor 62 to control the start and stop of the vacuum system 6, maintain the vacuum degree at the highest point of the siphon water intake pipe, and connect the water body in the open water area and the water body in the buffer well through the siphon water intake pipe through atmospheric pressure.

[0022] The open water area is the sea or estuary water area, which has the characteristics of high tide difference. A grid is set at the end of the siphon water intake pipe 2 in the open water area, and this end is lower than the end of the siphon water intake pipe 2 located in the buffer well 1.

[0023] The submersible pump 3 is arranged in the buffer well 1. The buffer well liquid level monitor 4 detects the buffer well water level and controls the submersible pump 3 to stop pumping water when the buffer well water level is lower than the lower limit of the water seal level of the siphon water intake pipe 2 at the buffer well end, so as to maintain the liquid level in the buffer well 1 to ensure the formation of a water seal of the siphon water intake pipe 2 at the buffer well end.

[0024] The pump-out pipeline system 40 is connected to the water storage tank 4 , the lower end of the pump-out pipeline system 40 is connected to the submersible pump 3 , and a check valve 41 is arranged on the pipeline.

[0025] The deepest point of the buffer well 1 is lower than the low tide level of the open water area, preferably 2-3 meters lower than the low tide level of the sea water.

[0026] The height of the highest point of the siphon water pipe 2 from the lowest tide level of the discharge water area is not greater than the height of the local atmospheric pressure water column, such as not greater than 10 meters; preferably, it is higher than the high tide level of the open water area but not higher than 3 meters of the high tide level.

[0027] If the buffer well 1 is a dry well with little or no water seepage, water can be added to the well to form a water seal at both ends of the siphon water pipe 2, and the siphon water pipe gas can be exhausted by the vacuum system 4 to fill the siphon water pipe 2 with seawater. The siphon water pipe 2 is used to continuously siphon seawater into the buffer well 1, and the submersible pump 3 continuously pumps out the seawater in the well to keep its water level lower than the water level of the open water area. If the water seepage of the buffer well 1 is lower than the pumped water volume, one or more siphon water pipes 2 are used to continuously siphon seawater into the buffer well.

[0028] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the protection scope of the present invention.

Claims

1. A seawater intake device, characterized in that: It includes a buffer well, a siphon water pipe, a submersible pump or a submersible pump, a pump-out pipe system, and a buffer well liquid level monitor; The two ends of the siphon water-suction pipeline are respectively connected to open water and a buffer well, and the highest point thereof is connected to a vacuum system; The submersible pump or submersible pump is arranged in the buffer well; The buffer well liquid level monitor detects the buffer well water level and controls the submersible pump or submersible pump to stop pumping water when the buffer well water level is lower than the lower limit of the water seal level of the siphon water intake pipe at the buffer well end, so as to maintain the liquid level in the buffer well to ensure the formation of a water seal at the buffer well end of the siphon water intake pipe.

2. A seawater intake device according to claim 1, characterized in that: A vacuum tube is arranged at the highest point of the siphon water-suction pipeline, and the vacuum tube is connected to a vacuum system through a valve.

3. A seawater intake device as claimed in claim 1, characterized in that: The pump out pipe system is connected to the water storage tank.

4. A seawater intake device as claimed in claim 1, characterized in that: The deepest point of the buffer well is lower than the low tide level of the open water area, preferably 2-3 meters lower than the low tide level of the sea water.

5. A seawater intake device as claimed in claim 1, characterized in that: The height of the highest point of the siphon water pipe from the lowest tide level is not greater than the height of the local atmospheric pressure water column; preferably, it is higher than the high tide level but not higher than 3 meters from the high tide level.

6. A seawater intake device as claimed in claim 1, characterized in that: If the buffer well is a dry well with little or no water seepage, water can be added into the well to form water seals at both ends of the siphon water pipe, and the gas in the siphon water pipe is discharged by a vacuum system to fill the siphon water pipe with seawater. The siphon water pipe is used to continuously siphon seawater into the buffer well, and the submersible pump or submersible pump continuously pumps out the seawater in the well to keep its water level lower than that of the open water area.

7. A seawater intake device as claimed in claim 1, characterized in that: If the water seepage of the buffer well is lower than the water output of the pump, one or more siphon water pipes are used to continuously siphon seawater into the buffer well.

8. The seawater intake device according to claim 1, characterized in that: The vacuum tube is provided with a vacuum degree monitor to control the start and stop of the vacuum system, maintain the vacuum degree at the highest point of the siphon water intake pipe, and connect the water body in the open water area and the water body in the buffer well through the siphon water intake pipe through atmospheric pressure.

Images