CN110585926B - Seawater desalination energy recovery device - Google Patents
Seawater desalination energy recovery device Download PDFInfo
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- CN110585926B CN110585926B CN201911033008.7A CN201911033008A CN110585926B CN 110585926 B CN110585926 B CN 110585926B CN 201911033008 A CN201911033008 A CN 201911033008A CN 110585926 B CN110585926 B CN 110585926B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/06—Energy recovery
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/066—Overpressure, high pressure
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Hydraulic Motors (AREA)
Abstract
The invention discloses a seawater desalination energy recovery device, which comprises a shell, wherein a first end cover is fixedly arranged at one end of the shell, and a second end cover is fixedly arranged at the other end of the shell; a flow distribution shaft extending into the shell is arranged at the middle position of the first end cover, and a rotor is rotationally connected with the shell; ten radial plunger holes are formed in the side face of the outer circumference of the rotor, and each radial plunger hole is internally and slidably connected with a pressurizing plunger; the rotor is provided with a radial chute; the first end cover is provided with an annular curve groove, a power rod is arranged in the radial slide groove, one end of the power rod is fixedly connected with the pressurizing plunger, and the other end of the power rod is positioned in the annular curve groove; the second end cover is provided with a first interface and a second interface, and the flow distribution shaft is provided with a third interface and a fourth interface; a first flow distribution assembly and a second flow distribution assembly are arranged in the shell; the seawater desalination energy recovery device is simple in structure, and can continuously work to avoid instability caused by valve flow distribution and pressure pulsation caused by reciprocating.
Description
Technical Field
The invention belongs to the technical field of energy recycling, and particularly relates to a seawater desalination energy recycling device for energy exchange between pressurized liquid and pressurized liquid.
Background
Reverse osmosis seawater desalination is an important technology for solving the shortage of fresh water resources, and has been popularized and applied in global coastal areas. In order to obtain higher desalted water recovery rate in the technical process, the pressure of the pressurized liquid at the inlet of the reverse osmosis membrane unit is usually required to be as high as 5.5-6.0MPa, so that the energy consumption of the system operation is huge. Meanwhile, the pressure of the high-pressure brine discharged from the reverse osmosis membrane unit device is higher than 5.0MPa, and if the brine is discharged directly through a pressure reducing valve, the system energy is wasted greatly. After the energy recovery device is used, the pressure energy stored in the high-pressure brine discharged by the reverse osmosis membrane group device is reused and transferred to the low-pressure fresh seawater, and the operation energy consumption of the reverse osmosis seawater desalination system can be reduced by more than 50 percent according to the desalination water recovery rate estimation of 40 percent.
The energy recovery device is used for recovering and reutilizing the pressure energy of the high-pressure concentrated seawater of the reverse osmosis system, so that the water production energy consumption and the water production cost of reverse osmosis seawater desalination are reduced. Most of reverse osmosis sea water desalination projects built into production or under construction in China adopt energy recovery devices imported from abroad, and the cost is quite high.
Therefore, there is an urgent need to develop an energy recovery device with chinese proprietary intellectual property rights.
The disclosed valve-controlled energy recovery device mainly has the following defects: (1) The valve-controlled energy recovery device switcher adopts a reciprocating switching structure mode, so that the internal structure is complex, and the flow and pressure pulsation of two flows of high-pressure brine and pressure-released brine controlled by the valve-controlled energy recovery device switcher are also large; (2) The amplification of the processing capacity of the valve-controlled energy recovery device can only be realized by increasing the length or the diameter of the hydraulic cylinder, so that the manufacturing cost and the installation space of the device are obviously increased; (3) The check valve set used by the valve-controlled energy recovery device needs to meet the high-frequency switching requirements of the pressurizing stroke and the pressure release stroke of the device, and the service life of the check valve set and the overall operation stability of the device are obviously reduced.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to provide a seawater desalination energy recovery device which is simple in structure and can continuously work to avoid instability caused by valve flow distribution and pressure pulsation caused by reciprocating.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: the seawater desalination energy recovery device comprises a shell, wherein a first end cover is fixedly arranged at one end of the shell, and a second end cover is fixedly arranged at the other end of the shell; a flow distribution shaft extending into the shell is arranged at the middle position of the first end cover, and a rotor is rotatably connected on the flow distribution shaft in the shell;
ten radial plunger holes are uniformly formed in the outer circumferential side surface of the rotor at intervals by taking the axis of the rotating shaft as a center, and each radial plunger hole is internally and slidably connected with a pressurizing plunger; the rotor is provided with ten radial sliding grooves which are in one-to-one correspondence with and are communicated with the radial plunger holes on the surface facing the first end cover; the first end cover is provided with an annular curve groove on the end face facing the rotor, a power rod is arranged in the radial slide groove, one end of the power rod is fixedly connected with the pressurizing plunger, and the other end of the power rod is positioned in the annular curve groove; when the pressurizing plunger moves in the radial plunger hole, the power rod pushes the rotor to rotate under the action of the annular curved slot; a first plunger chamber is formed in each radial plunger hole between one end of the pressurizing plunger and the inner circumferential side wall of the casing, and a second plunger chamber is formed between the other end of the pressurizing plunger and the bottom of the radial plunger hole;
the second end cover is provided with a first interface communicated with the low-pressure new sea water pipe and a second interface communicated with the high-pressure new sea water pipe, and the flow distribution shaft is provided with a third interface communicated with the high-pressure concentrated salt water pipe and a fourth interface communicated with the concentrated salt water discharge pipe; the shell is internally provided with a first flow distribution assembly and a second flow distribution assembly, the first flow distribution assembly is used for controlling low-pressure new seawater entering from a first interface to flow into a first plunger cavity and pushing a pressurizing plunger to move towards a flow distribution shaft, meanwhile, a second plunger cavity is communicated with a fourth interface under the action of the second flow distribution assembly, concentrated brine in the second plunger cavity is discharged from the fourth interface, and when the pressurizing plunger moves towards the flow distribution shaft, a rotor rotates under the action of a power rod and an annular curve groove; when the rotor rotates to the second plunger cavity and is communicated with the third interface under the action of the second flow distribution assembly, high-pressure strong brine enters the second plunger cavity from the second flow distribution assembly and pushes the pressurizing plunger to move in the direction away from the flow distribution shaft, meanwhile, the first plunger cavity is communicated with the second interface under the action of the first flow distribution assembly, low-pressure new seawater in the first plunger cavity is pressurized under the action of the pressurizing plunger and is discharged from the second interface, and when the pressurizing plunger moves in the direction away from the flow distribution shaft, the rotor continues to rotate under the action of the power rod and the annular curved groove.
In a further technical scheme, the first flow distribution assembly comprises a middle flow distribution plate which is fixedly arranged on the second end cover and is pressed on the shell under the action of the second end cover; six first through-flow grooves are uniformly formed in the inner circumferential side wall of the shell at intervals by taking the flow distribution shaft as a center, a first through hole communicated with the first interface is formed in the middle flow distribution plate, a first annular groove communicated with the first through hole and six first communication grooves used for communicating the first annular groove with the first through-flow grooves are formed in the end face of the middle flow distribution plate, which faces the rotor;
six second through-flow grooves are uniformly formed in the inner circumferential side wall of the shell at intervals by taking the flow distribution shaft as a center, and the six first through-flow grooves and the six second through-flow grooves are sequentially and alternately arranged along the circumferential direction of the rotor by taking the flow distribution shaft as a center; six second through holes which are in one-to-one correspondence with and are communicated with the second through grooves are uniformly arranged on the middle flow distribution plate at intervals by taking the flow distribution shaft as a center; the end face of the second end cover facing the middle valve plate is provided with a second annular groove communicated with the first connector and six second communicating grooves used for communicating the second annular groove with the second through hole.
In a further technical scheme, the second flow distribution assembly comprises a flow distribution shaft core, a shaft hole is formed in the flow distribution shaft, and the flow distribution shaft core is arranged in the shaft hole; the circumference side surface of the flow distribution shaft core is provided with a first annular cutting groove and a second annular cutting groove in parallel, and six third through holes communicated with the first annular cutting groove and six fourth through holes communicated with the second annular cutting groove are uniformly arranged in the flow distribution shaft at intervals taking the axis of the flow distribution shaft as a center; the six third through holes and the six fourth through holes are sequentially and alternately arranged along the circumferential direction of the flow distribution shaft by taking the axis of the flow distribution shaft as the center; a fifth through hole used for communicating the third interface and the third through hole and a sixth through hole used for communicating the fourth interface and the fourth through hole are arranged in the flow distribution shaft; six third communication grooves communicated with the third through holes and six fourth communication grooves communicated with the fourth through holes are formed in the outer circumferential side surface of the flow distribution shaft; and a seventh through hole for communicating the second plunger cavity with the third communication groove or the fourth communication groove is formed in the bottom of each radial plunger hole in the rotor.
In a further technical scheme, the opening part of each radial plunger hole is fixedly provided with a hollow plug, and the pressurizing plunger comprises a plunger body which is connected in the radial plunger hole in a sliding way and a guide cylinder which is arranged on the plunger body and stretches into the hollow plug.
In a further technical scheme, the rotor is provided with a first rotating shaft hole, the flow distribution shaft is positioned in the first rotating shaft hole, and a thrust bearing is arranged between one end of the flow distribution shaft extending into the casing and the bottom of the first rotating shaft hole.
In a further technical scheme, the second end cover is provided with a second rotating shaft hole at the center of the end face of the shell, the rotor is provided with a protruding shaft extending into the second rotating shaft hole, and a sliding sheet is arranged outside the protruding shaft in the second rotating shaft hole.
(III) beneficial effects
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) The axial flow distribution and annular curve groove structure is adopted, so that the operation of the seawater desalination energy recovery device is coherent and reliable;
(2) The flow distribution is not needed through other valves, so that the service life of the recovery device is long;
(3) The process of pressurizing new seawater and discharging strong brine is excessively smooth, and the pressure pulsation is small.
Drawings
FIGS. 1-5 are block diagrams of the assembly of the present invention;
FIG. 6 is a first angular exploded view of the present invention;
FIG. 7 is a second angular exploded view of the present invention;
FIG. 8 is a cross-sectional view taken along the direction A-A in FIG. 4;
FIG. 9 is a sectional view taken in the direction B-B of FIG. 3;
FIGS. 10-11 are block diagrams of the second end cap of the present invention;
FIG. 12 is a block diagram of a housing of the present invention;
FIG. 13 is a block diagram of a first end cap of the present invention;
FIGS. 14-17 are block diagrams of rotors of the present invention;
FIGS. 18-19 are block diagrams of intermediate port plates of the present invention;
FIGS. 20-22 are block diagrams of the flow distributing shaft of the present invention;
FIG. 23 is a block diagram of a split core according to the present invention;
fig. 24 is a diagram of the application of the present invention in a desalination work system.
Detailed Description
Referring to fig. 1 to 24, a seawater desalination energy recovery device comprises a casing 2, wherein one end of the casing 2 is fixedly provided with a first end cover 5 through bolts, and the other end of the casing 2 is fixedly provided with a second end cover 4 through bolts; the middle position of the first end cover 5 is provided with a flow distribution shaft 7 extending into the machine shell 2, and the machine shell 2 is rotatably connected with the rotor 1 on the flow distribution shaft 7. The rotor 1 is provided with a first rotating shaft hole 101, the flow distribution shaft 7 is positioned in the first rotating shaft hole 101, and a thrust bearing 11 is arranged between one end of the flow distribution shaft 7 extending into the casing 2 and the bottom of the first rotating shaft hole 101. The second end cover 4 is provided with a second rotating shaft hole 401 at the center of the end face facing the casing 2, the rotor 1 is provided with a protruding shaft 102 extending into the second rotating shaft hole 401, and the outer side of the protruding shaft 102 in the second rotating shaft hole 401 is provided with a sliding sheet 12.
Ten radial plunger holes 1b are uniformly formed in the outer circumferential side surface of the rotor 1 at intervals taking the axis of the rotating shaft as a center, pressurizing plungers 6 are slidably connected in each radial plunger hole 1b, hollow plugs 9 for preventing the pressurizing plungers 6 from being separated from the radial plunger holes 1b are threadably connected at the opening of each radial plunger hole 1b, and each pressurizing plunger 6 comprises a plunger body 601 slidably connected in the radial plunger hole 1b and a guide cylinder 602 arranged on the plunger body 601 and extending into the hollow plugs 9. The rotor 1 is provided with ten radial sliding grooves 1a which are in one-to-one correspondence with and are communicated with the radial plunger holes 1b on the surface facing the first end cover 5; the end face of the first end cover 5, which faces the rotor 1, is provided with an annular curve groove 5a, a power rod 8 is arranged in the radial chute 1a, one end of the power rod 8 is fixedly connected with the pressurizing plunger 6, and the other end of the power rod is positioned in the annular curve groove 5 a; when the pressurizing plunger 6 moves in the radial plunger hole 1b, the power rod 8 pushes the rotor 1 to rotate under the action of the annular curved slot 5 a; a first plunger chamber 1d is formed in each radial plunger hole 1b between one end of the pressurizing plunger 6 and the inner circumferential side wall of the casing 2, and a second plunger chamber 1c is formed between the other end of the pressurizing plunger 6 and the bottom of the radial plunger hole 1 b;
the second end cover 4 is provided with a first interface 411 communicated with a low-pressure new sea water pipe and a second interface 412 communicated with a high-pressure new sea water pipe, and the flow distribution shaft 7 is provided with a third interface 711 communicated with a high-pressure concentrated salt water pipe and a fourth interface 712 communicated with a concentrated salt water discharge pipe; a first flow distribution assembly and a second flow distribution assembly are arranged in the shell 2, the first flow distribution assembly is used for controlling low-pressure new seawater entering from the first interface 411 to flow into the first plunger cavity 1d and pushing the pressurizing plunger 6 to move towards the flow distribution shaft 7, meanwhile, the second plunger cavity 1c is communicated with the fourth interface 712 under the action of the second flow distribution assembly, strong brine in the second plunger cavity 1c is discharged from the fourth interface 712, and when the pressurizing plunger 6 moves towards the flow distribution shaft 7, the rotor 1 rotates under the action of the power rod 8 and the annular curve groove 5 a; when the rotor 1 rotates to the second plunger cavity 1c and is communicated with the third interface 711 under the action of the second flow distribution assembly, high-pressure strong brine enters the second plunger cavity 1c from the second flow distribution assembly and pushes the pressurizing plunger 6 to move away from the flow distribution shaft 7, meanwhile, the first plunger cavity 1d is communicated with the second interface 412 under the action of the first flow distribution assembly, low-pressure new seawater in the first plunger cavity 1d is pressurized under the action of the pressurizing plunger 6 and is discharged from the second interface 412, and when the pressurizing plunger 6 moves away from the flow distribution shaft 7, the rotor 1 continues to rotate under the action of the power rod 8 and the annular curved groove 5 a.
The first flow distribution assembly comprises a middle flow distribution plate 3, wherein the middle flow distribution plate 3 is fixedly arranged on a second end cover 4 and is pressed on the shell 2 under the action of the second end cover 4; six first through-flow grooves 2a are uniformly formed in the inner circumferential side wall of the casing 2 at intervals centering on the flow distribution shaft 7, a first through hole 3g communicated with the first connector 411 is formed in the middle flow distribution plate 3, a first annular groove 3b communicated with the first through hole 3g and six first communication grooves 3c used for communicating the first annular groove 3b and the first through-flow grooves 2a are formed in the end face of the middle flow distribution plate 3, which faces the rotor 1.
Six second through flow grooves 2b are uniformly arranged on the inner circumferential side wall of the shell 2 at intervals taking the flow distribution shaft 7 as a center, and the six first through flow grooves 2a and the six second through flow grooves 2b are alternately arranged in sequence along the circumferential direction of the rotor 1 by taking the flow distribution shaft 7 as a center; six second through holes 3a which are in one-to-one correspondence with and are communicated with the second through flow grooves 2b are uniformly arranged on the middle flow distribution plate 3 at intervals by taking the flow distribution shaft 7 as a center; the second end cap 4 is provided with a second annular groove 4a communicating with the first port 411 and six second communicating grooves 4c for communicating the second annular groove 4a with the second through hole 3a on an end face facing the intermediate port plate 3.
The second flow distribution assembly comprises a flow distribution shaft core 10, a shaft hole 701 is formed in the flow distribution shaft 7, and the flow distribution shaft core 10 is installed in the shaft hole 701; the circumferential side surface of the flow distribution shaft core 10 is provided with a first annular cutting groove 10a and a second annular cutting groove 10b in parallel, and six third through holes 7h communicated with the first annular cutting groove 10a and six fourth through holes 7g communicated with the second annular cutting groove 10b are uniformly arranged in the flow distribution shaft 7 at intervals taking the axis of the flow distribution shaft as a center; the six third through holes 7h and the six fourth through holes 7g are alternately arranged in turn along the circumferential direction of the flow distribution shaft 7 with the axis of the flow distribution shaft 7 as the center; a fifth through hole 7b for communicating the third interface 711 with the third through hole 7h and a sixth through hole 7d for communicating the fourth interface 712 with the fourth through hole 7g are arranged in the flow distributing shaft 7; six third communication grooves 7a communicated with the third through holes 7h and six fourth communication grooves 7c communicated with the fourth through holes 7g are formed in the outer circumferential side surface of the flow distribution shaft 7; a seventh through hole 111 for communicating the second plunger chamber 1c with the third communication groove 7a or the fourth communication groove 7c is provided in the rotor 1 at the bottom of each radial plunger hole 1 b.
When the seawater desalination energy recovery device is used, low-pressure fresh seawater passes through the first connector 411, the first through hole 3g, the first annular groove 3b, the first communication groove 3c and the first through groove 2a to reach the first plunger cavity 1d, and at the moment, the second plunger cavity 1c of the radial plunger hole 1b is connected with a strong brine discharge pipeline through the seventh through hole 111, the fourth communication groove 7c, the fourth through hole 7g, the second annular groove 10b, the sixth through hole 7d and the fourth connector 712, so that the pressure of the second plunger cavity 1c is zero, the low-pressure fresh seawater can push the pressurizing plunger 6 to move towards the direction of the flow distribution shaft 7 to discharge the waste strong brine in the second plunger cavity 1c, and the power rod 8 matched with the pressurizing plunger 6 can drive the pressurizing plunger 6 to rotate around the flow distribution shaft 7 under the action of the annular curved groove 5a, when the power rod 8 moves to the position of the annular curved groove 5a closest to the flow distribution shaft 7, the first plunger cavity 1d is maximum, the first plunger cavity 1d is not communicated with the second plunger cavity 1c or the second plunger cavity 7c is not communicated with the first plunger cavity 7c, namely, the waste strong brine in the second plunger cavity 1c is not communicated with the second plunger cavity 1c is completely, and the waste brine in the direction of the second plunger cavity 1c is not communicated with the second plunger cavity 1c is completely.
In the process, the pressurizing plunger 6 is at dead point, at this time, under the drive of the pressurizing plunger 6 working on the rotation inertia of the rotor 1 and other positions, the rotor 1 continues to rotate, so that the pressurizing plunger 6 at dead point rotates to the second plunger cavity 1c to be connected with the third communication groove 7a through the seventh through hole 111, the first plunger cavity 1d is connected with the second communication groove 4c, at this time, high-pressure strong brine enters into the second plunger cavity 1c through the third interface 711, the fifth through hole 7b, the third through hole 7h, the first annular cutting 10a, the third communication groove 7a and the seventh through hole 111, the pressurizing plunger 6 is pushed to pressurize the low-pressure new seawater in the first plunger cavity 1d, so that the pressure in the first plunger cavity 1d is equal to the pressure in the system, the system pressure is equal to the high-pressure strong brine pressure, so that the high-pressure strong brine pushes the pressurizing plunger 6 to move in the direction away from the distributing shaft 7 and discharges high-pressure new brine, the power rod 8 matched with the pressurizing plunger 6 drives the pressurizing plunger 6 to rotate around the distributing shaft 7 under the action of the annular curve groove 5a, when the power rod 8 moves to the position where the annular curve groove 5a is farthest away from the distributing shaft 7, the first plunger cavity 1d becomes minimum, the first plunger cavity 1d is not communicated with the first communicating groove 3c or the second communicating groove 4c any more, the second plunger cavity 1c is not communicated with the third communicating groove 7a or the fourth communicating groove 7c any more, namely, the dead point position is reached, and the pressurizing of the low-pressure new brine is completed and discharged to the seawater desalination energy recovery device. After the rotary plunger 6 enters the dead point position, the rotor 1 continues to rotate under the drive of the pressurizing plunger 6 working on the rotation inertia of the rotor 1 and other positions, so that the pressurizing plunger 6 at the dead point continues to rotate, the second plunger cavity 1c is communicated with the fourth communication groove 7c and the fourth interface 712 through the seventh through hole 111, the first plunger cavity 1d is communicated with the first interface 411 through the first communication groove 3c, then low-pressure fresh sea water enters, and waste strong brine is discharged, so that circulation is formed.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (5)
1. The seawater desalination energy recovery device is characterized by comprising a shell, wherein a first end cover is fixedly arranged at one end of the shell, and a second end cover is fixedly arranged at the other end of the shell; a flow distribution shaft extending into the shell is arranged at the middle position of the first end cover, and a rotor is rotatably connected on the flow distribution shaft in the shell;
ten radial plunger holes are uniformly formed in the outer circumferential side surface of the rotor at intervals by taking the axis of the rotating shaft as a center, and each radial plunger hole is internally and slidably connected with a pressurizing plunger; the opening of each radial plunger hole is fixedly provided with a hollow plug, and the pressurizing plunger comprises a plunger body which is connected in the radial plunger hole in a sliding way and a guide column body which is arranged on the plunger body and extends into the hollow plug; the rotor is provided with ten radial sliding grooves which are in one-to-one correspondence with and are communicated with the radial plunger holes on the surface facing the first end cover; the first end cover is provided with an annular curve groove on the end face facing the rotor, a power rod is arranged in the radial slide groove, one end of the power rod is fixedly connected with the pressurizing plunger, and the other end of the power rod is positioned in the annular curve groove; when the pressurizing plunger moves in the radial plunger hole, the power rod pushes the rotor to rotate under the action of the annular curved slot; a first plunger chamber is formed in each radial plunger hole between one end of the pressurizing plunger and the inner circumferential side wall of the casing, and a second plunger chamber is formed between the other end of the pressurizing plunger and the bottom of the radial plunger hole;
the second end cover is provided with a first interface communicated with the low-pressure new sea water pipe and a second interface communicated with the high-pressure new sea water pipe, and the flow distribution shaft is provided with a third interface communicated with the high-pressure concentrated salt water pipe and a fourth interface communicated with the concentrated salt water discharge pipe; the shell is internally provided with a first flow distribution assembly and a second flow distribution assembly, the first flow distribution assembly is used for controlling low-pressure new seawater entering from a first interface to flow into a first plunger cavity and pushing a pressurizing plunger to move towards a flow distribution shaft, meanwhile, a second plunger cavity is communicated with a fourth interface under the action of the second flow distribution assembly, concentrated brine in the second plunger cavity is discharged from the fourth interface, and when the pressurizing plunger moves towards the flow distribution shaft, a rotor rotates under the action of a power rod and an annular curve groove; when the rotor rotates to the second plunger cavity and is communicated with the third interface under the action of the second flow distribution assembly, high-pressure strong brine enters the second plunger cavity from the second flow distribution assembly and pushes the pressurizing plunger to move in the direction away from the flow distribution shaft, meanwhile, the first plunger cavity is communicated with the second interface under the action of the first flow distribution assembly, low-pressure new seawater in the first plunger cavity is pressurized under the action of the pressurizing plunger and is discharged from the second interface, and when the pressurizing plunger moves in the direction away from the flow distribution shaft, the rotor continues to rotate under the action of the power rod and the annular curved groove.
2. The seawater desalination energy recovery apparatus of claim 1, wherein the first flow distribution assembly comprises a middle flow distribution plate fixedly mounted on the second end cap and compressed against the housing by the second end cap; six first through-flow grooves are uniformly formed in the inner circumferential side wall of the shell at intervals by taking the flow distribution shaft as a center, a first through hole communicated with the first interface is formed in the middle flow distribution plate, a first annular groove communicated with the first through hole and six first communication grooves used for communicating the first annular groove with the first through-flow grooves are formed in the end face of the middle flow distribution plate, which faces the rotor;
six second through-flow grooves are uniformly formed in the inner circumferential side wall of the shell at intervals by taking the flow distribution shaft as a center, and the six first through-flow grooves and the six second through-flow grooves are sequentially and alternately arranged along the circumferential direction of the rotor by taking the flow distribution shaft as a center; six second through holes which are in one-to-one correspondence with and are communicated with the second through grooves are uniformly arranged on the middle flow distribution plate at intervals by taking the flow distribution shaft as a center; the end face of the second end cover facing the middle valve plate is provided with a second annular groove communicated with the first connector and six second communicating grooves used for communicating the second annular groove with the second through hole.
3. The seawater desalination energy recovery apparatus of claim 1, wherein the second flow distribution assembly comprises a flow distribution shaft core, wherein a shaft hole is arranged in the flow distribution shaft, and the flow distribution shaft core is arranged in the shaft hole; the circumference side surface of the flow distribution shaft core is provided with a first annular cutting groove and a second annular cutting groove in parallel, and six third through holes communicated with the first annular cutting groove and six fourth through holes communicated with the second annular cutting groove are uniformly arranged in the flow distribution shaft at intervals taking the axis of the flow distribution shaft as a center; the six third through holes and the six fourth through holes are sequentially and alternately arranged along the circumferential direction of the flow distribution shaft by taking the axis of the flow distribution shaft as the center; a fifth through hole used for communicating the third interface and the third through hole and a sixth through hole used for communicating the fourth interface and the fourth through hole are arranged in the flow distribution shaft; six third communication grooves communicated with the third through holes and six fourth communication grooves communicated with the fourth through holes are formed in the outer circumferential side surface of the flow distribution shaft; and a seventh through hole for communicating the second plunger cavity with the third communication groove or the fourth communication groove is formed in the bottom of each radial plunger hole in the rotor.
4. The seawater desalination energy recovery apparatus of claim 1, wherein the rotor has a first shaft hole, the flow distribution shaft is disposed in the first shaft hole, and a thrust bearing is disposed between an end of the flow distribution shaft extending into the housing and a bottom of the first shaft hole.
5. The seawater desalination energy recovery apparatus of claim 1, wherein the second end cap is provided with a second rotation shaft hole at a position facing the center of the end face of the housing, the rotor is provided with a protruding shaft protruding into the second rotation shaft hole, and a sliding sheet is provided outside the protruding shaft in the second rotation shaft hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911033008.7A CN110585926B (en) | 2019-10-28 | 2019-10-28 | Seawater desalination energy recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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