Pipe gallery type water taking structure for seawater desalination

Abstract

The invention belongs to the field of ocean engineering, and discloses a pipe gallery type water taking structure for sea water desalination, the basic shape of the pipe gallery type water taking structure for sea water desalination is a hollow shape with an opening surrounding and bending towards the sea, the inward bending parts at the two ends are water inlet galleries, and the middle part is a water taking gallery; the water taking gallery is composed of a concrete gallery frame structure and six check gates, the check gates are all gate plates with lifting heights controlled by a manual operation board, the concrete water taking gallery is divided into five cavities through the six check gates, the middle cavity is a water pump chamber for containing a submersible pump, two cavities adjacent to the water pump chamber are seawater buffer chambers, and the seawater buffer chambers are connected with the water pump chamber. And the two outermost chambers adjacent to the seawater buffer chamber are raw seawater inlet chambers. The technical scheme has the functions of low investment, bidirectional water inflow, desilting and ice prevention, and is suitable for seawater desalination water taking engineering construction.

Description

Technical Field

[0001] The invention belongs to the field of marine engineering, and in particular relates to a pipe gallery type water intake structure for seawater desalination. Background Art

[0002] Seawater intake is an important component and process of seawater desalination plants, and is an important guarantee for providing sufficient, continuous and suitable source water for seawater desalination operations. The construction of seawater intake projects needs to take into account factors such as seawater quality, cost investment, meteorological conditions, and natural disasters of seawater desalination plants. The choice of water intake methods and the construction of water intake structures have an important impact on the investment, water production costs, and stable operation of the entire desalination plant.

[0003] At present, many commonly used near-shore seawater water intake methods adopt seabed water intake, that is, a pump house is built on the shore, and a water intake head is built in the sea area a certain distance away from the shore to ensure the water quality. The water intake head is connected to the pump house through a water pipeline. For example, the patent applications with publication numbers CN212772589U and CN212358457U both adopt the water intake head water intake method. However, this water intake method has certain disadvantages: first, the construction cost is high. Since the water intake head goes a certain distance into the sea and is affected by ocean waves, high requirements are placed on the construction level of the water intake head, which undoubtedly greatly increases the workload of marine work and the investment in seawater intake project construction; second, the maintenance of the water intake head is difficult. Since the water intake head is a certain distance from the shore and is set below the sea surface, ordinary staff cannot effectively maintain the water intake head during daily operations. A professional marine construction team must be invited to maintain the water intake head, which invisibly increases maintenance costs and labor costs; third, after a certain number of years, the water intake head will accumulate marine suspended sediment over time, and a professional team needs to be invited to intervene in the construction, otherwise the accumulated sediment will clog the pipeline or even cause it to be scrapped.

[0004] In addition, another consideration in the construction of seawater desalination water intake projects is the water quality. The water intake site for seawater desalination is generally selected near the coast. The nearshore seashore is the junction of land and sea. The water quality is greatly affected by the sediment entering the sea from the land. At the same time, due to the influence of ocean dynamics such as tides and wind and waves in the nearshore section, it is very easy to cause the disturbance of seabed sediment, so the water quality near the coast is relatively poor. Therefore, the appropriate water intake method can improve the water quality of seawater desalination, reduce the pretreatment process of subsequent seawater desalination projects, and reduce the operating cost and investment cost of the overall seawater desalination project.

[0005] Based on the above points, the applicant designed a pipe gallery-type water intake structure with two-way water inlet for seawater desalination. The technical solution adopted has excellent water quality, low investment, and easy maintenance. It also has built-in anti-icing and dredging functions, which is of great practical significance for the construction of seawater desalination water intake projects. Summary of the invention

[0006] Aiming at the problems existing in the existing seawater desalination water intake engineering technology, the present invention proposes a pipe gallery type water intake structure with low investment, two-way water intake, dredging and ice prevention.

[0007] The basic shape of the pipe gallery-type water intake structure for seawater desalination is an open hollow shape that is bent toward the sea. The parts that bend inward at both ends are the water intake corridors, and the middle part is the water intake corridor.

[0008] As a preferred embodiment, the bends of the water inlet corridor and the water intake corridor are arc transitions;

[0009] The water intake corridor consists of a concrete corridor frame structure and six control gates;

[0010] The two outermost control gates are marked as control gate 1 a and control gate 6 f, the two control gates near the inside are marked as control gate 2 b and control gate 5 e, and the two innermost middle control gates are marked as control gate 3 c and control gate 4 d;

[0011] The control gates are all gates with manual operating discs to control the lifting height;

[0012] The six control gates divide the concrete water intake corridor into five chambers. The middle chamber is the pump room where the submersible pump is placed. The two chambers adjacent to the pump room are seawater buffer chambers. The two chambers closest to the seawater buffer chamber are the original seawater intake chambers.

[0013] The control gates B 2 and E 5 entering the seawater buffer room and the control gates C 3 and D 4 entering the water pump room have water inlet holes on their upper parts, and the seawater is exchanged and flows through these water inlet holes, and the water inlet holes are equipped with stainless steel protective nets;

[0014] As a preferred embodiment, the meshes of the protection net are unevenly distributed with smaller holes at the bottom and larger holes at the top;

[0015] As a preference, the number of the circular holes may also be several;

[0016] Preferably, the water inlet holes are of different sizes, and the diameters of the water inlet holes decrease from top to bottom of the control gate;

[0017] Preferably, the water inlet hole is a circular hole with an inclined angle, and the closer to the upper part of the regulating gate, the larger the inclined angle;

[0018] As a preferred embodiment, the outer side surfaces of all control gates are unevenly convex, which has a certain buffering effect on the waves;

[0019] Preferably, a dosing port is provided at the top of the seawater buffer chamber;

[0020] In this technical solution, the main function of the pipe gallery water intake structure bending towards the sea side is to prevent land sediment from directly flowing into the intake corridors on both sides along with the runoff. The main function of the seawater buffer chamber is to let the raw seawater stand for a certain period of time to ensure the effective precipitation of suspended sediment. The raw seawater intake chamber intakes water from the lower part to ensure that floating objects such as garbage, suspended matter, and floating ice in the seawater do not enter the seawater buffer chamber. The intake holes of the sluice gate equipped with a stainless steel protective net can ensure that seawater enters from the upper part, enabling the initial precipitation of suspended sediment and minimizing the entry of sediment into the pump chamber. The stainless steel protective net can also prevent swimming organisms such as fish from entering the pump chamber and blocking the pump. The intake holes with different inclination angles help prevent debris and swimming organisms from directly entering the seawater buffer chamber and the pump chamber. The intake holes of different sizes can conduct primary screening and filtration on debris of different sizes and at different heights in the seawater. The stainless steel protective net with holes of different sizes can also conduct height screening and filtration on debris of different sizes. A chemical dosing port is reserved at the top of the seawater buffer chamber. During the typhoon season or when there is a large amount of suspended sediment in the seawater, flocculants, coagulants and other chemicals can be added to help the sediment in the seawater buffer chamber precipitate faster, thereby improving the water quality of the water entering the pump chamber. The lifting of the sluice gate can be operated by turning the knob of the manual operation panel.

[0021] When using the pipe gallery water intake structure of this technical solution for seawater desalination water intake, when the water demand is small, one-way water intake can be carried out. When the water demand of the seawater desalination plant is large, two-way water intake can be carried out.

[0022] Process of one-way water intake: Open the No. a sluice gate 1 to lift the No. a sluice gate 1, and close the No. b, c, d, e, f sluice gates 6. Seawater enters the raw seawater intake chamber from the lower part of the No. a sluice gate 1, effectively preventing sea surface garbage, suspended matter or ice floes from entering the seawater buffer chamber. The seawater in the raw seawater intake chamber enters the seawater buffer chamber through the upper intake holes of the No. b sluice gate 2, and the seawater in the seawater buffer chamber enters the pump chamber again through the upper intake holes of the No. c sluice gate 3. At this time, the pump can pump the seawater in the pump chamber for use by the seawater desalination plant. During this process, due to the enclosed space, the hydrodynamic force of the seawater weakens, and the suspended sediment in the seawater will form two depositions in the raw seawater intake chamber and the seawater buffer chamber, maximizing the prevention of sediment from entering the pump chamber.

[0023] When taking water unidirectionally, the No. f sluice gate 6 on the other side can also be opened, and the similar operations will not be elaborated here.

[0024] Process of two-way water intake: Open the sluice gates 6 of No. a and No. f, raise the sluice gates 6 of No. a and No. f, close the sluice gates c, d, and e. Seawater enters the original seawater intake chamber from the lower part of the sluice gates 6 of No. a and No. f. The seawater in the original seawater intake chamber enters the seawater buffer chamber through the upper intake holes of the sluice gates 5 of No. b and No. e. The seawater in the seawater buffer chamber enters the pump chamber again through the upper intake holes of the sluice gates 4 of No. c and No. d. At this time, the pump can extract the seawater in the pump chamber and supply it to the seawater desalination plant.

[0025] Process of automatic silt cleaning: Open the sluice gates 6 of No. a, No. b, No. c, No. d, No. e, and No. f to raise the sluice gates 6 of No. a, No. b, No. c, No. d, No. e, and No. f. After raising, the entire water intake structure forms a corridor with both sides communicating. Seawater enters from one side and flows out from the other side. Due to the confinement of the corridor, the water channel is narrow, forming a channel effect. The seawater entering the corridor forms a vortex, with rapid water flow and a large flow velocity. Therefore, after all the sluice gates are opened, through the action of seawater hydrodynamics, the silt deposited in each chamber of the water intake corridor can be effectively scoured. After the silt cleaning is completed, close the sluice gates 5 of No. b, No. c, No. d, and No. e again to achieve the purpose of two-way water intake, and close the sluice gates 6 of No. b, No. c, No. d, No. e, and No. f to achieve the purpose of one-way water intake.

[0026] The beneficial effects of the pipe gallery type water intake structure for seawater desalination proposed in this application are as follows: The technical solution divides the chambers of the concrete water intake corridor through sluice gates, and conducts processes such as water intake, buffering, sedimentation, and multi-stage selective filtration, which can ensure the purity of the water quality of the water intake. The surrounding pipe gallery type water intake structure can reduce the direct impact of sea waves on the water intake and prevent land runoff from directly carrying sediment into the water intake corridor. Two-sided water intake can control and select the water intake volume according to needs. Opening all the sluice gates on both sides can also perform automatic sewage discharge and silt cleaning functions in a timely manner. In summary, this technical solution has excellent water intake quality, low investment, convenient maintenance, and also has anti-icing and silt cleaning functions by itself, and is particularly suitable for the construction of seawater desalination water intake projects. Description of the Drawings

[0027] The drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the drawings described below are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0028] Figure 1 It is a schematic diagram of the pipe gallery type water intake structure;

[0029] Figure 2 It is an axonometric drawing of the water intake structure;

[0030] Figure 3It is a sectional view of a seawater intake structure;

[0031] Figure 4 It is the structure of sluice gate No. 1 of type a and sluice gate No. 6 of type f;

[0032] Figure 5 It is a schematic structural diagram of sluice gate No. 2 of type b, sluice gate No. 3 of type c, sluice gate No. 4 of type d, and sluice gate No. 5 of type e.

[0033] Figure 6 It is another preferred schematic structural diagram of sluice gate No. 2 of type b, sluice gate No. 3 of type c, sluice gate No. 4 of type d, and sluice gate No. 5 of type e.

[0034] In the figure: 1. Sluice gate No. 1 of type a; 2. Sluice gate No. 2 of type b; 3. Sluice gate No. 3 of type c; 4. Sluice gate No. 4 of type d; 5. Sluice gate No. 5 of type e; 6. Sluice gate No. 6 of type f; 7. Concrete corridor framework; 8. Chemical dosing port a; 9. Manhole cover; 10. Chemical dosing port b; 11. Submersible pump; 12. Manual operation panel; 13. Water inlet hole

[0035] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by reference to specific embodiments. Detailed implementation manners

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0037] Embodiment: As Figures 1 to 6 shown, a pipe gallery type water intake structure for seawater desalination has a basic shape that is an open-ended, seaward-embracing, curved hollow shape. The inwardly bent parts at both ends are the intake corridors, and the middle part is the water intake corridor;

[0038] The bend between the intake corridor and the water intake corridor is a circular arc transition;

[0039] The water intake corridor is composed of a concrete corridor framework 7 and six sluice gates;

[0040] The two outermost sluice gates are marked as sluice gate No. 1 of type a and sluice gate No. 6 of type f. The two sluice gates closer to the inside are marked as sluice gate No. 2 of type b and sluice gate No. 5 of type e. The two middle sluice gates on the innermost side are marked as sluice gate No. 3 of type c and sluice gate No. 4 of type d;

[0041] The sluice gates are all gate plates with a manually operated panel 12 to control the lifting height;

[0042] The six-way sluice divides the concrete water intake corridor into five chambers. The middle chamber is the pump chamber for placing the submersible pump 11. The two chambers adjacent to the pump chamber are the seawater buffer chambers. The two chambers adjacent to the seawater buffer chambers and closest to the outside are the raw seawater intake chambers;

[0043] The No. 2 sluice (b) and the No. 5 sluice (e) entering the seawater buffer chamber and the No. 3 sluice (c) and the No. 4 sluice (d) entering the pump chamber have water inlet holes 13 left at the upper part. Seawater exchanges and flows through these water inlet holes 13, and a protective net made of stainless steel is installed on the water inlet holes 13;

[0044] The number of water inlet holes can also be several;

[0045] The water inlet holes of the sluice are in a non-uniform distribution state with the lower part being smaller and the upper part being larger;

[0046] Several water inlet holes 13 are of different sizes, and the diameter of the water inlet holes 13 becomes smaller from top to bottom of the sluice;

[0047] The water inlet holes 13 are round holes with an inclined angle. The closer to the upper part of the sluice, the larger the inclined angle;

[0048] The outer surface of all the sluices has uneven protrusions, which play a certain buffering role for the sea waves;

[0049] There are dosing ports a8 and dosing port b10 left at the top of the seawater buffer chamber;

[0050] In the technical solution of the embodiment, the main function of the pipe gallery type water intake structure bending towards the sea is to prevent land sediment from directly pouring into the intake corridors on both sides along with the runoff. The main function of the seawater buffer chamber is to let the raw seawater stand for a certain period of time to ensure the effective precipitation of suspended sediment. The raw seawater intake chamber intakes water from the lower part to ensure that garbage, suspended matter and floating ice in the seawater do not enter the seawater buffer chamber. The water inlet holes 13 of the sluice equipped with a protective net made of stainless steel can not only ensure the entry of seawater from the upper part, enabling the initial precipitation of suspended sediment and minimizing the entry of sediment into the pump chamber, but also the stainless steel protective net can prevent swimming organisms such as fish from entering the pump chamber and blocking the pump. The water inlet holes 13 with different inclined angles help prevent sundries and swimming organisms from directly entering the seawater buffer chamber and the pump chamber. The water inlet holes 13 of different sizes can conduct primary screening and filtration on sundries of different sizes and at different heights in the seawater. The function of the protective net made of stainless steel with different pore sizes can also conduct layer height screening and filtration on sundries of different sizes. There are dosing ports a8 and dosing port b10 left at the top of the seawater buffer chamber. In the typhoon season or when there is a lot of suspended sediment in the seawater, flocculants, coagulants and other agents can be added to help the sediment in the seawater buffer chamber precipitate faster, thereby improving the water quality of the water entering the pump chamber. The lifting of the sluice gate can be operated by turning the knob of the manual operation panel 12.

[0051] When using the pipe gallery type water intake structure of this embodiment for seawater desalination water intake, when the water demand is small, one-way water intake can be carried out. When the water demand of the seawater desalination plant is large, two-way water intake can be carried out.

[0052] Process of one-way water intake: Open the No. a check gate 1 to lift the No. a check gate 1, and close the No. b, c, d, e, and f check gates. Seawater enters the raw seawater intake chamber from the lower part of the No. a check gate 1, effectively preventing sea surface garbage, suspended matter or ice floes from entering the seawater buffer chamber. The seawater in the raw seawater intake chamber enters the seawater buffer chamber through the upper water inlet hole 13 of the No. b check gate 2, and the seawater in the seawater buffer chamber enters the pump chamber again through the upper water inlet hole 13 of the No. c check gate 3. At this time, the pump can extract the seawater in the pump chamber and supply it to the seawater desalination plant for use. During this process, due to the enclosed space, the hydrodynamic force of the seawater weakens, and the suspended sediment in the seawater will form two depositions in the raw seawater intake chamber and the seawater buffer chamber, preventing sediment from entering the pump chamber to the greatest extent.

[0053] When taking water unidirectionally, the No. f check gate 6 on the other side can also be opened, and similar operations will not be elaborated.

[0054] Process of two-way water intake: Open the No. a and No. f check gates 6 to lift the No. a and No. f check gates 6, and close the No. c, d, and e check gates. Seawater enters the raw seawater intake chamber from the lower parts of the No. a and No. f check gates 6. The seawater in the raw seawater intake chamber enters the seawater buffer chamber through the upper water inlet holes 13 of the No. b and No. e check gates 5, and the seawater in the seawater buffer chamber enters the pump chamber again through the upper water inlet holes 13 of the No. c and No. d check gates 4. At this time, the pump can extract the seawater in the pump chamber and supply it to the seawater desalination plant.

[0055] Process of automatic silt cleaning: Open the No. a, b, c, d, e, and f check gates to lift the No. a, b, c, d, e, and f check gates 6. After lifting, the entire water intake structure forms a corridor that is connected on both sides. Seawater enters from one side and flows out from the other side. Due to the confinement of the corridor, the water channel is narrow, forming a channel effect. The seawater entering the corridor forms a vortex, the water flow is rapid, and the flow velocity is large. Therefore, after all the check gates are opened, through the action of the seawater hydrodynamic force, the silt deposited in each chamber of the water intake corridor can be effectively scoured. After the silt cleaning is completed, close the No. b, c, d, and e check gates 5 again to achieve the purpose of two-way water intake, and close the No. b, c, d, e, and f check gates to achieve the purpose of one-way water intake.

[0056] The beneficial effects of the pipe gallery type water intake structure for seawater desalination proposed in this embodiment are as follows: The technical solution adopted divides the chambers separated by the regulating sluice in the concrete water intake corridor, and processes such as water intake, buffering, sedimentation, and multi-stage selective filtration are carried out, which can ensure the purity of the water quality of the water intake. The surrounding pipe gallery type water intake structure can reduce the direct impact of sea waves on the water intake and the damage to the water quality. Water intake on both sides can be controlled and the water intake can be selected according to needs. When the regulating sluices on both sides are fully opened, the functions of automatic sewage discharge and silt cleaning can be carried out in a timely manner. In summary, the technical solution of this embodiment has excellent water intake quality, low investment, and convenient maintenance, and at the same time has anti-icing and silt cleaning functions, and is particularly suitable for the construction of seawater desalination water intake projects.

[0057] In the specification provided here, a large number of specific details are described. However, it can be understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0058] The above description is only a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications using the technical content prompted above into equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiment based on the technical essence of the present invention still fall within the scope of the present invention's solution.

Claims

1. A pipe gallery type water intake structure for seawater desalination, characterized in that, The basic shape is an open hollow shape that bends toward the sea. The parts that bend inward at both ends are the water inlet corridors, and the middle part is the water intake corridor. The bends between the water inlet corridor and the water intake corridor are arc transitions; The water intake corridor is composed of a concrete corridor frame structure (7) and six control gates; The control gates are all gate plates with a manual operating disk (12) to control the lifting height; The six control gates include: the two outermost control gates are marked as control gate a (1) and control gate f (6), the two control gates close to the inner side are marked as control gate b (2) and control gate e (5), and the two innermost middle control gates are marked as control gate c (3) and control gate d (4); The six control gates divide the concrete water intake corridor into five chambers, the middle chamber is a water pump chamber for placing a submersible pump (11), the two chambers adjacent to the water pump chamber are seawater buffer chambers, and the two chambers closest to the seawater buffer chamber are original seawater intake chambers; The b-th regulating gate (2), the e-th regulating gate (5), the c-th regulating gate (3) and the d-th regulating gate (4) are provided with water inlet holes (13) on their upper parts; The water inlet (13) is equipped with a stainless steel protective net; The water inlet holes (13) are of different sizes, and the diameter of the water inlet holes (13) becomes smaller and smaller from top to bottom of the control gate; The meshes of the protection net are unevenly distributed with smaller holes at the bottom and larger holes at the top. The water inlet hole (13) is a circular hole with an inclined angle, and the closer it is to the upper part of the regulating gate, the larger the inclined angle.

2. The pipe gallery type water intake structure for seawater desalination according to claim 1, characterized in that, The surface of the six-way control gate facing outward is unevenly convex, and the top of the seawater buffer chamber is provided with a dosing port a (8) and a dosing port b (10).

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