CN1312450C - Variable depth and large diameter seawater sucking system - Google Patents

Abstract

The variable-depth large-diameter seawater pumping system is to arrange a group of water-drawing components at different depths underground along the coast. Each water-drawing component includes an insulated water storage unit, a filter, a pump, etc., and the filter passes through the pipeline. The shore wall protrudes into the sea and is the suction port for seawater. A group of underwater heat-insulating water storage units located on each floor are connected in parallel to form an insulated water reservoir. The system can pump seawater at different depths and large diameters. The system relies on the control of the flow sensor installed on the pipeline connecting the filter and the stop valve to realize automatic backwashing of the filter to prevent system blockage. At the same time, relying on the control of the temperature sensor to ensure that the temperature of the pumped seawater is low enough, the seawater with a suitable temperature is pumped from the shallowest depth and large diameter to achieve the purpose of energy saving and cheap cooling.

Description

Variable depth and large diameter seawater pumping system

technical field

The invention relates to a seawater pumping system, in particular to a variable-depth large-diameter seawater pumping system in which the depth of a water intake can be changed, and belongs to the technical field of marine engineering.

Background technique

At present, the known seawater cooling technology is to extract the surface seawater for industrial cooling. Since the extracted surface seawater is at normal temperature, it does not have obvious cooling effect. Patent No. 00103513.4 "Water-saving system for diverting seawater in coastal cities for residential and industrial use in production" only uses seawater for flushing toilets and cannot be used for cooling technology.

Invention content:

In order to overcome the defect of insufficient cold capacity carried by surface seawater in the existing seawater cooling technology, the present invention provides a seawater pumping system with variable depth and large diameter. The system can pump seawater in large quantities at different depths to ensure that the temperature of the pumped seawater is low enough so that the seawater can carry enough cold energy for cooling.

The technical scheme adopted by the present invention to solve the technical problem is: arrange a group of water-drawing components of different depths in corresponding underground parts along the coast. The depth of the water-drawing component is equivalent to between 20 meters and 220 meters below sea level, and is determined according to the depth occupied by the local subsurface seawater. The main body of the water drawing assembly is an adiabatic water storage unit, which includes an adiabatic water storage unit, a filter, a pump, etc., wherein the filter extends into the sea through a pipe through the shore wall, and is the suction port of seawater. A group of underwater heat-insulating water storage units located on each floor are connected in parallel to form an insulated water reservoir. The depth difference between the upper and lower adjacent two insulated water reservoirs is 50 meters. The filter is connected with the shut-off valve, and the shut-off valve is connected with the heat-insulated water storage unit. A seawater multistage centrifugal pump is installed on the top of the heat-insulated water storage unit, and the outlet of the pump is connected with the inlet of the three-way valve. The upper outlet of the three-way valve is connected with the underwater thermal insulation reservoir at the previous depth through the water delivery pipeline. Another outlet of the three-way valve communicates with the inlet of the shut-off valve. A temperature sensor is installed in the adiabatic water storage unit, and the flow sensor is installed on the pipeline connecting the filter and the shut-off valve, and the position of the shut-off valve is controlled according to the signal of the temperature sensor.

When the seawater at a certain depth reaches the required temperature, the water-drawing components near the depth start to work, and the water-drawing components below the depth all stop working, so as to save energy consumption. At this time, the seawater multi-stage centrifugal pump of the working water-drawing component works, the seawater is sucked through the filter, and the filtered seawater flows into the adiabatic water storage unit through the shut-off valve, and is lifted to a higher-level adiabatic water storage unit by the water pump.

When the seawater at this depth does not reach the required low temperature, the shut-off valves on the water drawing assembly at this depth are all closed, and the water drawing assembly at the next depth pours water into the adiabatic water storage unit and then is lifted up by the water pump.

When the flow sensed by the flow sensor connected to the adiabatic water storage unit that is drawing water decreases significantly, indicating that the resistance of the filter is too large or has been blocked, the flow sensor sends a signal to control the shut-off valve to close. At the same time, the position of the three-way valve is switched, and the seawater pumped by the seawater multistage centrifugal pump is discharged into the filter through the backwashing pipeline, and the filter is backwashed for a specified length of time to achieve the purpose of dredging. After flushing, if the flow resistance is still too large after the adiabatic water storage unit works normally, the flushing process will be repeated again. Then, the working states of the three-way valve and the shut-off valve are restored again, so that the adiabatic water storage unit resumes drawing water.

The beneficial effect of the present invention is that seawater with sufficiently low temperature is extracted from as shallow a depth and a large diameter as possible, so as to achieve energy saving and low-cost cooling supply.

Description of drawings:

Fig. 1 is a schematic diagram of the system structure of the present invention

In the figure: 1 is the sea, 2 is the filter, 3 is the adiabatic water storage unit, 4 is the seawater multistage centrifugal pump, 5 is the three-way valve, 6 is the temperature sensor, 7 is the stop valve, 8 is the flow sensor, 9 is the The water pipeline, 10 is a reverse flushing pipeline.

specific implementation plan

Below, the specific implementation of the present invention will be further described in conjunction with the accompanying drawings.

As shown in Figure 1, the present invention includes: a filter 2, an adiabatic water storage unit 3, a seawater multistage centrifugal pump 4, a three-way valve 5, a temperature sensor 6, a stop valve 7, a flow sensor 8, a water delivery pipeline 9, and Flush line 10. A group of heat-insulated water storage units 3 on each floor are connected in parallel to form a large-capacity heat-insulated water reservoir. The depth difference between the upper and lower adjacent two insulated water reservoirs is 50 meters.

A group of water-drawing components of different depths are arranged at corresponding underground parts along the coast. The depth of the water-drawing component is equivalent to between 20 meters and 220 meters below sea level, and is determined according to the depth occupied by the local subsurface seawater. The main body of the water drawing assembly is an adiabatic water storage unit 3, and each water drawing assembly includes a filter 2, an adiabatic water storage unit 3, a seawater multistage centrifugal pump 4, a three-way valve 5, a shut-off valve 7, a water delivery pipeline 9, and Flush line 10. Wherein the filter 2 stretches into the sea through the shore wall through the pipeline, and its inlet is the suction port of the seawater. The inlet of the filter 2 communicates with the sea 1, and the outlet communicates with the inlet of the shut-off valve 7 through a pipeline. The outlet of the shut-off valve 7 is connected with the adiabatic water storage unit 3 . The suction port of the seawater multistage centrifugal pump 4 is inserted into the adiabatic water storage unit 3 , and the outlet of the seawater multistage centrifugal pump 4 is connected with the inlet end of the three-way valve 5 . The upper outlet of the three-way valve 5 is connected with the adiabatic water storage unit 3 at the upper depth through a water delivery pipeline 9 . The other outlet of the three-way valve 5 communicates with the inlet of the stop valve 7, the temperature sensor 6 is installed in the adiabatic water storage unit 3, and the flow sensor 8 is installed on the pipeline connecting the filter 2 and the stop valve 7. The output end of the temperature sensor 6 is electrically connected to the stop valve 7, and the output end of the flow sensor 8 is electrically connected to the three-way valve 5 and the stop valve 7 respectively.

The working position of the cut-off valve 7 is controlled according to the sensing signal of the temperature sensor 6 . When the seawater at a certain depth reaches the required temperature, the water drawing components near the depth start to work, and the water drawing components at the depth below the component all stop working. At this time, the seawater multi-stage centrifugal pump 4 of the working water-drawing component is working, the seawater is sucked through the filter 2, and the filtered seawater flows into the adiabatic water storage unit 3 through the stop valve 7, and is lifted by the water pump 4 to a higher-level adiabatic storage unit. Water unit 3. When the seawater at this depth does not reach the required low temperature, all the shut-off valves 7 on the water drawing assembly at this depth are closed, and the water drawn by the water drawing assembly at the next depth is poured into the adiabatic water storage unit 3 and then lifted up by the water pump 4 .

When the flow sensed by the flow sensor 8 connected to the adiabatic water storage unit 3 that is drawing water is significantly reduced, it indicates that the resistance of the filter 2 is too large or has been blocked, and the flow sensor 8 sends a signal to control the shut-off valve 7 to close. At the same time, the position of the three-way valve 5 is switched, and the seawater pumped by the seawater multi-stage centrifugal pump 4 is discharged into the filter 2 through the backwashing pipeline, and the filter 2 is backwashed for a specified length of time to achieve the purpose of dredging . After flushing is completed, if the flow resistance is still too large after the adiabatic water storage unit 3 works normally, the flushing and refilling process will be repeated again. Then, the working states of the three-way valve 5 and the shut-off valve 7 are restored again, so that the adiabatic water storage unit 3 resumes drawing water.

Claims (3)

1. A variable-depth large-diameter seawater pumping system is a group of water-drawing components arranged at different depths underground along the coast, and each water-drawing component includes a filter (2), an adiabatic water storage unit (3), seawater Multi-stage centrifugal pump (4), three-way valve (5), shut-off valve (7), water delivery pipeline (9), reverse flushing pipeline (10); characterized in that: the filter (2) passes through the pipeline The shore wall stretches into the sea (1), its inlet is the suction port of seawater, the inlet of the filter (2) communicates with the sea, and the outlet communicates with the inlet of the shut-off valve (7) through the pipeline, and the outlet of the shut-off valve (7) communicates with the sea The adiabatic water storage unit (3) is connected, the suction port of the seawater multistage centrifugal pump (4) is inserted into the adiabatic water storage unit (3), and the outlet of the seawater multistage centrifugal pump (4) is connected with the inlet end of the three-way valve (5) , the upper outlet of the three-way valve (5) is connected to the adiabatic water storage unit (3) at the previous depth through the water delivery pipeline (9), and the other outlet of the three-way valve (5) is connected to the inlet of the shut-off valve (7) . 2. The variable-depth large-diameter seawater pumping system according to claim 1, characterized in that: a temperature sensor (6) is installed in the adiabatic water storage unit (3), and a temperature sensor (6) is installed between the filter (2) and the shut-off valve (7). A flow sensor (8) is installed on the connected pipeline, the output end of the temperature sensor (6) is electrically connected with the shut-off valve (7), and the output end of the flow sensor (8) is connected with the three-way valve (5) and the shut-off valve (7) respectively. ) electrical connection. 3. The variable-depth large-diameter seawater pumping system according to claim 1, characterized in that: a group of heat-insulated water storage units (3) on each floor are connected in parallel to form a large-capacity heat-insulated water reservoir.