Seawater lifting device of temperature difference energy power generation system

Abstract

The utility model discloses a seawater lifting device of a temperature difference energy power generation system, which comprises a supporting platform and a lifting pump, a suspension assembly is arranged on the upper surface of the supporting platform, and the lower end of the suspension assembly is communicated with a single first lifting vertical pipe at the uppermost end through a spherical joint; a tensioning assembly and a telescopic assembly are further installed on the outer circumference of the first single lifting stand pipe at the uppermost end. The first single lifting vertical pipe is sequentially communicated with a plurality of single lifting vertical pipes downwards until the first single lifting vertical pipe downwards goes deep into the seawater; the lifting pump is installed between the two adjacent single lifting vertical pipes at the preset depth, and a lower port of the single lifting vertical pipe at the lowest end is communicated with the suction filter and the counterweight assembly. The utility model belongs to the technical field of seawater suction equipment, adopts a large-drift-diameter rigid vertical pipe as a seawater lifting system main body, and solves the problems in the prior art that the strength is not enough, the service life of a suction hose is short, and the suction hose is difficult to use for a long time.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of pumping seawater equipment relates to the thermoelectric power generation system seawater lifting device. BACKGROUND

[0002] The seawater temperature difference energy is the heat energy between the water temperature difference of the surface seawater and the deep seawater, the surface seawater converts most of the radiant energy of the sun into hot water and stores in the upper ocean, the seawater close to freezing point flows about 1000m underwater, and the vertical seawater temperature difference of more than 20 DEG C is formed all the year round, and the heat cycle and power generation can be realized by utilizing the temperature difference.

[0003] The prior art adopts the hose to pump seawater from the seabed, so as to reduce the pressure head loss of seawater flowing in the pipe, and to reach the deep seawater, the lifting device is required to be as large as possible in diameter, long enough, and the lifting device must have enough strength to ensure long-term use, and the lifting device also has good heat preservation performance to prevent the temperature of cold seawater from rising and affecting the heat efficiency, and these problems have not been well solved, and a new device needs to be developed to realize the lifting of seawater. UTILITY MODEL CONTENTS

[0004] The utility model discloses a thermoelectric power generation system seawater lifting device, and solves the problems of insufficient strength, short service life of pumping hose and difficult long-term use in the prior art.

[0005] The utility model discloses a technical scheme that a thermoelectric power generation system seawater lifting device, including support platform and lifting pump, the upper surface of support platform is provided with the suspension subassembly, the lower end of suspension subassembly is communicated with the first lifting standpipe single root in the uppermost end through the ball joint, the uppermost end first lifting standpipe single root outer circle is also installed with the tensioning subassembly and telescopic subassembly, the first lifting standpipe single root is communicated with a plurality of lifting standpipe single roots downwards in proper order, and it is down to the deep seawater in depth, lifting pump is installed between two lifting standpipe single roots of predetermined depth, and the lower end of the last lifting standpipe single root is communicated with the suction filter and the counterweight subassembly.

[0006] The utility model discloses a thermoelectric power generation system seawater lifting device, and the feature is still in that:

[0007] The upper end export of lifting pump is communicated with one lifting standpipe single root in the upper direction through the upper lifting pump butt joint subassembly, and the lower end import of lifting pump is communicated with one lifting standpipe single root in the lower direction through the lower lifting pump butt joint subassembly.

[0008] The structure of upper lifting pump butt joint subassembly and lower lifting pump butt joint subassembly is identical, adopts the flange structure, is formed by lower port flange and upper port flange respectively, adopts a circle bolt and nut to be mutually fastened and connected when each pair of flanges is butted, and realizes axial sealing by sealing bushing.

[0009] Each of the riser pipes is a 15-20m long single steel pipe, and is fixedly connected in sequence at the upper and lower ports to form a pipe string.

[0010] The upper part of the pipe string is hung on the support platform through a hanging assembly, and the lower part of the pipe string is free to hang through the connected suction filter and counterweight assembly.

[0011] The rotation range of the ball joint is ±15°.

[0012] The lifting pump is arranged at a depth of 500-700m under water.

[0013] The suction filter and counterweight assembly comprises a seawater filtering component and a counterweight.

[0014] Compared with the hose lifting device, the application adopts a large-diameter rigid riser as a main body of a seawater lifting system, has high structural strength, can meet the requirement of long-term use, has simple structure, high connection efficiency, low labor intensity and low use cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Fig. 1 is a schematic view of the overall structure of the device of the application;

[0016] Figure 2 Fig. 2 is a schematic view of the structure of each riser pipe in the device of the application.

[0017] In the figure, 1. hanging assembly, 2. support platform, 3. ball joint, 4. tensioning assembly, 5. telescopic assembly, 6. upper lifting pump connecting assembly, 7. lifting pump, 8. lower lifting pump connecting assembly, 9. riser pipe, 10. suction filter and counterweight assembly, 11. lower port flange, 12. upper port flange. DETAILED DESCRIPTION

[0018] The application will be described in detail below in combination with the drawings and specific embodiments.

[0019] Referring to Figure 1 The structure of the lifting device of the application is that it comprises a support platform 2 (arranged on the base platform of a work ship or an offshore platform) and a lifting pump 7, and the upper surface of the support platform 2 is provided with a hanging assembly 1, and the lower end of the hanging assembly 1 is connected with the first riser pipe 9 at the uppermost end through a ball joint 3;

[0020] The outer circumference of the first riser pipe 9 at the uppermost end is further provided with a tensioning assembly 4 and a telescopic assembly 5, so as to ensure that the whole pipe string floats up and down with the support platform 2 and the tensioning force, and ensure the safety of the system with the sea wave.

[0021] The first lifting riser 9 is connected to a plurality of lifting risers 9 in sequence downwardly until the depth of 2000 meters of seawater, and the first lifting riser 9 at the uppermost end and the last lifting riser 9 at the lowermost end are collectively referred to as a pipe string;

[0022] The lifting pump 7 is installed between two adjacent lifting risers 9 at a predetermined depth, the upper end outlet of the lifting pump 7 is communicated with the lifting riser 9 above through the upper lifting pump butt joint assembly 6, and the lower end inlet of the lifting pump 7 is communicated with the lifting riser 9 below through the lower lifting pump butt joint assembly 8.

[0023] The lower end port of the lifting riser 9 at the lowermost end is communicated with the suction filter and weight assembly 10.

[0024] All the lifting risers 9 are selected from single steel pipes with a length of 15-20 meters, which are fixedly and butted in sequence according to the upper and lower end ports to form a pipe string with a length of about 2000 meters. The upper part of the pipe string is hung on the support platform 2 through the hanging assembly 1, and the lower part of the pipe string is free to sag without constraint through the communicated suction filter and weight assembly 10.

[0025] The spherical joint 3 can rotate within a range of ±15°, so as to reduce the adverse effects of sea wave flow, ship / platform drift and the like on the lifting device, and to ensure the safety of the lifting device operation.

[0026] During the operation, the tensioning assembly 4 can provide real-time tension, and the telescopic assembly 5 can provide real-time upward and downward heave displacement compensation of ±7.5 meters. The tensioning assembly 4 and the telescopic assembly 5 are both used in cooperation with the existing technical equipment, which can obviously reduce the effects of the upward and downward heave movement of the ship / platform with the sea wave, and ensure the safety and reliability of the operation process.

[0027] The upper part of the telescopic assembly 5 is connected with the spherical joint 3 and the tensioning assembly 4 respectively, the spherical joint 3 is connected with the hanging assembly 1, and the hanging assembly 1 suspends the entire system on the support platform 2 by using the existing equipment.

[0028] Referring to Figure 2 The upper lifting pump butt joint assembly 6 and the lower lifting pump butt joint assembly 8 have the same structure, both of which adopt a flange structure and are composed of a lower port flange 11 and an upper port flange 12. When each pair of flanges is butted, a ring (6-8 sets) of bolts and nuts are used for mutual fastening connection and centering positioning, and a sealing bushing is used for axial sealing, which has high sealing reliability.

[0029] The lifting pump 7 is arranged at a depth of 500-700 meters underwater, and the lifting pump 7 adopts the existing lifting pump in the market, which only needs to be selected with appropriate power and lift according to the needs of the system.

[0030] The total of the lifting riser single pipes 9 is connected to form a pipe string suitable for 2000 meters of water depth, the diameter of the lifting riser single pipe 9 is 360-420mm, and the pipe wall thickness is 15-25mm; preferably, the diameter of the lifting riser single pipe 9 is 380mm, and the pipe wall thickness is 20mm. In order to improve the lowering and recovery efficiency, the upper and lower ports of the lifting riser single pipe 9 are provided with the flange type connection or quick connection structure.

[0031] The seawater filtering part and the counterweight are arranged in the suction filter and counterweight assembly 10, the counterweight is about 40 tons, is hung at the lowermost part, and the whole lifting device is kept in a certain bottom tension at all times; the suction filter can filter seabed organisms, rocks and other sundries, so that the pipe string is prevented from being blocked or the lifting pump 7 is prevented from being damaged.

[0032] The lifting pump 7 is selected according to the formula: power (P) = flow (Q) x head (H) x fluid density (p) x gravity acceleration (g), the seawater density is 1.051 g / cm3, the gravity acceleration is 9.81 m / s2, and the lifting pump head is 600 m.

[0033] The working principle of the utility model is that: a plurality of 18-meter-long lifting riser single pipes 9 are sequentially connected to form a pipe string of about 2000 meters, the upper part of the pipe string is hung on the base table surface of a ship or platform through the suspension assembly 1, the lower part of the pipe string is unrestrained, the whole lifting system is provided with the tensioning assembly 4 and the telescopic assembly 5, and the lifting system floats up and down with the ship or platform. Compared with the conventional hose lifting system, the device adopts a large-diameter rigid riser as the main body of the seawater lifting system, has high structural strength, can meet the requirement of long-term use, has simple structure, high connection efficiency, low labor intensity, low use cost and the like.

[0034] Embodiment 1

[0035] The structure of the embodiment 1 comprises a support platform 2 (arranged on the base table surface of a work ship or an offshore platform) and a lifting pump 7, the upper surface of the support platform 2 is provided with the suspension assembly 1, the lower end of the suspension assembly 1 is communicated with the first lifting riser single pipe 9 at the uppermost end through the spherical joint 3; the telescopic assembly 5 and the tensioning assembly 4 are further arranged on the outer circumference of the first lifting riser single pipe 9 at the uppermost end, so that the whole pipe string can float up and down with the support platform 2 and the tensioning force is ensured, and the safety of the system with the sea wave is ensured.

[0036] The first lifting riser 9 is sequentially connected with multiple lifting risers 9 downwards until the depth of 2000 meters in seawater; from the first lifting riser 9 at the uppermost end to the last lifting riser 9 at the lowermost end, collectively referred to as a pipe string; the lifting pump 7 is installed between two adjacent lifting risers 9 at a predetermined depth, the upper end outlet of the lifting pump 7 is connected with the lifting riser 9 above through the upper lifting pump butt joint assembly 6, and the lower end inlet of the lifting pump 7 is connected with the lifting riser 9 below through the lower lifting pump butt joint assembly 8; the lower end port of the lifting riser 9 at the lowermost end is connected with the suction filter and weight assembly 10.

[0037] When the power of the lifting pump 7 is 280KW, the flow of the lifted seawater is about 45 m³ / h, and the device of the utility model does not appear any fault abnormity for one month of continuous use, and completes the normal seawater lifting operation task.

[0038] Example 2

[0039] The structure of this embodiment 2 comprises a support platform 2 (provided on the base platform of a work ship or an offshore platform) and a lifting pump 7, and the upper surface of the support platform 2 is provided with a suspension assembly 1, the lower end of the suspension assembly 1 is connected with the first lifting riser 9 at the uppermost end through a spherical joint 3; the first lifting riser 9 at the uppermost end is further provided with a tensioning assembly 4 and an extension assembly 5 on the outer circumference, so as to ensure that the whole pipe string floats up and down with the support platform 2 and the tensioning force, and ensure the safety of the system with the wave rise and fall;

[0040] The first lifting riser 9 is sequentially connected with multiple lifting risers 9 downwards until the depth of 2000 meters in seawater; from the first lifting riser 9 at the uppermost end to the last lifting riser 9 at the lowermost end, collectively referred to as a pipe string; the lifting pump 7 is installed between two adjacent lifting risers 9 at a predetermined depth, the upper end outlet of the lifting pump 7 is connected with the lifting riser 9 above through the upper lifting pump butt joint assembly 6, and the lower end inlet of the lifting pump 7 is connected with the lifting riser 9 below through the lower lifting pump butt joint assembly 8; the lower end port of the lifting riser 9 at the lowermost end is connected with the suction filter and weight assembly 10.

[0041] When the power of the lifting pump 7 is 240KW, the flow of the lifted seawater is about 38 m³ / h, and the device of the utility model does not appear any fault abnormity for one month of continuous use, and completes the normal seawater lifting operation task.

[0042] Example 3

[0043] The structure of the embodiment 3 is that it comprises a support platform 2 (arranged on the base platform of a work ship or an offshore platform) and a lifting pump 7, the upper surface of the support platform 2 is arranged with a suspension assembly 1, the lower end of the suspension assembly 1 is communicated with the first lifting riser string 9 at the uppermost end through a spherical joint 3; the outer circumference of the first lifting riser string 9 at the uppermost end is further arranged with a tension assembly 4 and an expansion assembly 5, which ensure the whole pipe string to float up and down with the support platform 2 and the tension force, and ensure the safety of the system with the sea wave;

[0044] The first lifting riser string 9 is sequentially communicated with a plurality of lifting riser strings 9 downwards, until it is deeply into the seawater 2000 meters deep; the first lifting riser string 9 at the uppermost end and the last lifting riser string 9 at the lowermost end are collectively referred to as a pipe string; the lifting pump 7 is installed between two adjacent lifting riser strings 9 at a predetermined depth, the upper end outlet of the lifting pump 7 is communicated with the lifting riser string 9 above through the upper lifting pump butt joint assembly 6, the lower end inlet of the lifting pump 7 is communicated with the lifting riser string 9 below through the lower lifting pump butt joint assembly 8; the lower end of the lifting riser string 9 at the lowermost end is communicated with the suction filter and the counterweight assembly 10.

[0045] When the power of the lifting pump 7 is 200KW, the flow of the lifted seawater is about 32 m³ / h, and the device of the utility model does not have any fault abnormity and completes the normal seawater lifting operation task for one month continuously.

[0046] Embodiment 4

[0047] The structure of the embodiment 4 is that it comprises a support platform 2 (arranged on the base platform of a work ship or an offshore platform) and a lifting pump 7, the upper surface of the support platform 2 is arranged with a suspension assembly 1, the lower end of the suspension assembly 1 is communicated with the first lifting riser string 9 at the uppermost end through a spherical joint 3; the outer circumference of the first lifting riser string 9 at the uppermost end is further arranged with a tension assembly 4 and an expansion assembly 5, which ensure the whole pipe string to float up and down with the support platform 2 and the tension force, and ensure the safety of the system with the sea wave;

[0048] The first lifting riser string 9 is sequentially communicated with a plurality of lifting riser strings 9 downwards, until it is deeply into the seawater 2000 meters deep; the first lifting riser string 9 at the uppermost end and the last lifting riser string 9 at the lowermost end are collectively referred to as a pipe string; the lifting pump 7 is installed between two adjacent lifting riser strings 9 at a predetermined depth, the upper end outlet of the lifting pump 7 is communicated with the lifting riser string 9 above through the upper lifting pump butt joint assembly 6, the lower end inlet of the lifting pump 7 is communicated with the lifting riser string 9 below through the lower lifting pump butt joint assembly 8; the lower end of the lifting riser string 9 at the lowermost end is communicated with the suction filter and the counterweight assembly 10.

[0049] When the power of the lifting pump 7 is 160KW, the lifted seawater flow is about 25 m³ / h, and the device of the utility model does not appear any fault abnormity for one month of continuous use, and completes the normal seawater lifting operation task.

[0050] Embodiment 5

[0051] The structure of this embodiment 5 is that the device comprises a support platform 2 (arranged on the base platform of a work ship or an offshore platform) and a lifting pump 7, the upper surface of the support platform 2 is provided with a suspension assembly 1, the lower end of the suspension assembly 1 is communicated with the first lifting riser single pipe 9 at the uppermost end through a spherical joint 3, and the outer circumference of the first lifting riser single pipe 9 at the uppermost end is further provided with a tension assembly 4 and an expansion assembly 5, so as to ensure that the whole pipe string floats up and down with the support platform 2 and the tension force, and ensure the safety of the system with the wave rise and fall.

[0052] The first lifting riser single pipe 9 is communicated with a plurality of lifting riser single pipes 9 downwards in sequence until the depth of 2000 meters in seawater, and the first lifting riser single pipe 9 at the uppermost end and the last lifting riser single pipe 9 at the lowermost end are collectively referred to as a pipe string, the lifting pump 7 is arranged between the two adjacent lifting riser single pipes 9 at the predetermined depth, the upper end outlet of the lifting pump 7 is communicated with the lifting riser single pipe 9 above through the upper lifting pump butt joint assembly 6, the lower end inlet of the lifting pump 7 is communicated with the lifting riser single pipe 9 below through the lower lifting pump butt joint assembly 8, and the lower end of the lifting riser single pipe 9 at the lowermost end is communicated with the suction filter and the counterweight assembly 10.

[0053] When the power of the lifting pump 7 is 120KW, the lifted seawater flow is about 19 m³ / h, and the device of the utility model does not appear any fault abnormity for one month of continuous use, and completes the normal seawater lifting operation task.

[0054] Embodiment 6

[0055] The structure of this embodiment 6 is that the device comprises a support platform 2 (arranged on the base platform of a work ship or an offshore platform) and a lifting pump 7, the upper surface of the support platform 2 is provided with a suspension assembly 1, the lower end of the suspension assembly 1 is communicated with the first lifting riser single pipe 9 at the uppermost end through a spherical joint 3, and the outer circumference of the first lifting riser single pipe 9 at the uppermost end is further provided with a tension assembly 4 and an expansion assembly 5, so as to ensure that the whole pipe string floats up and down with the support platform 2 and the tension force, and ensure the safety of the system with the wave rise and fall.

[0056] The first lifting riser string 9 is connected to a plurality of lifting riser strings 9 in sequence downwards until the depth of 2000 meters of seawater 2000; from the first lifting riser string 9 at the uppermost end to the last lifting riser string 9 at the lowermost end, collectively referred to as a pipe string; the lifting pump 7 is installed between two adjacent lifting riser strings 9 at a predetermined depth, the upper end outlet of the lifting pump 7 is communicated with the lifting riser string 9 above through the upper lifting pump butt joint assembly 6, the lower end inlet of the lifting pump 7 is communicated with the lifting riser string 9 below through the lower lifting pump butt joint assembly 8; the lower end port of the lifting riser string 9 at the lowermost end is communicated with the suction filter and weight assembly 10.

[0057] When the power of the lifting pump 7 is 75KW, the flow of the lifted seawater is about 12m³ / h, and the device of the utility model does not have any fault abnormity and completes the normal seawater lifting operation task for one month of continuous use.

[0058] From the above examples, the greater the power of the lifting pump, the greater the flow of the lifted seawater, and the more the converted seawater temperature difference can be, but in the specific implementation process, the efficiency of the lifting pump, the pipe friction loss, the bend resistance and other factors also need to be considered, and the accuracy, safety and economy are comprehensively considered in combination with the electric energy loss to determine the lifting pump power selection.

Claims

1. A thermosiphon seawater lifting device for a thermoelectric power generation system, characterized by: It comprises a support platform (2) and a lifting pump (7), the upper surface of the support platform (2) is provided with a suspension assembly (1), the lower end of the suspension assembly (1) is communicated with the first lifting riser string (9) at the uppermost end through a spherical joint (3); the outer circumference of the first lifting riser string (9) at the uppermost end is further provided with a tensioning assembly (4) and an extension assembly (5); the first lifting riser string (9) is sequentially communicated with multiple lifting riser strings (9) downwards, until it is deeply immersed in seawater; the lifting pump (7) is installed between two adjacent lifting riser strings (9) at a predetermined depth, and the lower end of the lifting riser string (9) at the lowermost end is communicated with a suction filter and counterweight assembly (10).

2. The thermoelectric power generation system seawater lifting device according to claim 1, characterized by: The upper end outlet of the lifting pump (7) is communicated with the lifting riser string (9) above through an upper lifting pump butt joint assembly (6), and the lower end inlet of the lifting pump (7) is communicated with the lifting riser string (9) below through a lower lifting pump butt joint assembly (8).

3. The thermoelectric power generation system seawater lifting device according to claim 2, characterized by: The upper lifting pump butt joint assembly (6) and the lower lifting pump butt joint assembly (8) have the same structure, both of which adopt a flange structure and are composed of a lower port flange (11) and an upper port flange (12), each pair of flanges is fastened and connected to each other by a circle of bolts and nuts, and axial sealing is realized by using a sealing bushing.

4. The thermoelectric power generation system seawater lifting device according to claim 1, characterized by: The lifting riser strings (9) are all single steel pipes with a length of 15-20 meters, which are sequentially fixed and butt-jointed at the upper and lower ports to form a pipe string.

5. The thermoelectric power generation system seawater lifting device according to claim 4, characterized by: The upper part of the pipe string is suspended on the support platform (2) through the suspension assembly (1), and the lower part of the pipe string freely hangs through the communicated suction filter and counterweight assembly (10).

6. The thermoelectric power generation system seawater lifting device according to claim 1, characterized by: The rotation range of the spherical joint (3) is ±15°.

7. The thermoelectric power generation system seawater lifting device according to claim 1, characterized by: The lifting pump (7) is arranged at a depth of 500-700 meters underwater.

8. The thermoelectric power generation system seawater lifting device according to claim 1, characterized by: The suction filter and counterweight assembly (10) comprises a seawater filter part and a counterweight.

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