CN108840401B - Water treatment energy recovery device - Google Patents
Water treatment energy recovery device Download PDFInfo
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- CN108840401B CN108840401B CN201810888804.8A CN201810888804A CN108840401B CN 108840401 B CN108840401 B CN 108840401B CN 201810888804 A CN201810888804 A CN 201810888804A CN 108840401 B CN108840401 B CN 108840401B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 238000011084 recovery Methods 0.000 title claims abstract description 26
- 239000002351 wastewater Substances 0.000 claims abstract description 132
- 239000013535 sea water Substances 0.000 claims description 38
- 238000007789 sealing Methods 0.000 claims description 27
- 238000001223 reverse osmosis Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 8
- 238000010612 desalination reaction Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a water treatment energy recovery device which comprises a first cylinder body, a second cylinder body, a cylinder body piston, a reversing valve seat, a pressure pump and a filter element, wherein the reversing valve seat is internally provided with a reversing valve, and the reversing valve comprises a reversing cavity, a reversing piston, a first stopping part, a second stopping part, a first wastewater inlet, a second wastewater outlet, a first water changing through hole and a second water changing through hole. The first cylinder body, the second cylinder body and the reversing valve seat are connected in a split mode, the structure is simple, the technical difficulty is low, the cost can be effectively reduced, faults are not easy to occur, the high-pressure wastewater filtered by the filter element is discharged into the reversing cavity in the reversing valve, the reversing piston is realized by the magnetic repulsion between the reversing piston and the cylinder piston, the high-pressure wastewater in the reversing cavity can enter the first high-pressure wastewater area/the second high-pressure wastewater area, the cylinder piston is pushed in an auxiliary mode, the energy consumption of the pressure pump is reduced, the energy conversion efficiency can be recovered by 95% -98%, and the energy conversion efficiency is high.
Description
[ Field of technology ]
The invention relates to energy recovery of pressurized fluid in water treatment, in particular to an energy recovery device for water treatment.
[ Background Art ]
The water treatment, namely sea water desalination treatment or industrial sewage disposal treatment, is taken as an example, reverse osmosis sea water desalination (SWRO) is one of the main current sea water desalination technologies, the concentrated water Yu Yagao discharged by a reverse osmosis membrane reaches 5.5-6.5 MPa, and according to the recovery rate of 40 percent, the discharged concentrated brine also contains about 60 percent of feed water pressure energy, and the recovery of the energy into the feed water energy can greatly reduce the energy consumption of the reverse osmosis sea water desalination, so that the energy consumption is the most effective means for reducing the sea water desalination cost, and the realization of the aim depends on the utilization of the energy recovery technology.
With the great application of reverse osmosis technology, various forms of energy recovery devices have also emerged. The development and application of reverse osmosis sea water desalination energy recovery technology of the journal and periodical of China are described in detail in 8 months 2010: the earliest energy recovery devices were of the hydro turbine type (as shown in figures 1 and 2), but since their energy conversion efficiency was not high (only up to 65% -80%), work-exchange type energy recovery devices were developed later, with early stages being more typical of rotor pressure exchangers (as shown in figure 3) and piston valve pressure exchangers (as shown in figure 4). The research and starting of the energy recovery device in China are late, a plurality of pneumatic valves are typically used for switching high-pressure water and low-pressure water, the action of the valves is controlled by a PLC (as shown in figure 5), the energy conversion efficiency of the energy recovery device in various forms is still not ideal (reaching 90% -95%), and the energy recovery device needs to be controlled by a booster pump, an electric control valve and the PLC, so that the problems of high cost, small flow, difficult control, high technical difficulty and the like exist; in order to solve the above problems, a novel energy recovery device (as shown in fig. 6) has been developed abroad, and the energy recovery device improves the energy conversion efficiency (up to 95% -98%), but still has the problems of complex structure, high technical difficulty, small flow and the like.
For the above case we provide a solution.
[ Invention ]
The invention aims to overcome the defects of the prior art and provide the water treatment energy recovery device which has the advantages of simple structure, low technical difficulty and high energy conversion efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme:
A water treatment energy recovery device comprises
The first cylinder body comprises a cylinder cavity, a first sealing end cover for sealing the end part is arranged at one axial end part of the first cylinder body, the other end part of the first cylinder body is not sealed at all, and the first sealing end cover axially penetrates through a first water inlet and a first water outlet;
The second cylinder body comprises a cylinder cavity, one axial end part of the second cylinder body is provided with a second sealing end cover for sealing the end part, the other end part of the second cylinder body is not sealed at all, and the second sealing end cover axially penetrates through a second water inlet and a second water outlet;
The reversing valve seat is of an annular structure; at least one reversing valve is axially arranged in the reversing valve seat, the reversing valve comprises a reversing cavity, the reversing cavity axially penetrates through the reversing valve seat, a low-pressure waste water outlet is arranged in the middle of the reversing cavity, which is close to the outer side, a first waste water inlet and a second waste water inlet are arranged on two sides of the reversing cavity, and the first waste water inlet, the second waste water inlet and the low-pressure waste water outlet radially penetrate through the reversing valve seat body from the inner side of the reversing cavity to the outer side of the reversing valve seat; a first stop part and a second stop part are arranged between the first wastewater inlet and the second wastewater inlet and between the first wastewater inlet and the low-pressure wastewater outlet respectively, and the first stop part and the second stop part radially protrude from the reversing valve seat body to the reversing cavity; a first drainage through hole and a second drainage through hole are arranged on the inner side of the reversing cavity opposite to the low-pressure wastewater outlet, and the first drainage through hole and the second drainage through hole are respectively arranged at two ends of the reversing cavity and are respectively communicated from the inside of the reversing cavity to the outside of the reversing valve seat; the reversing piston is arranged in the reversing cavity and comprises a first reversing plug, a second reversing plug and a reversing connecting rod, the first reversing plug can move in the reversing cavity between the first stop part and the end part, the first reversing plug can block and seal the first wastewater inlet when being propped against the end part, the first drainage through hole is opened, the second reversing plug can move in the reversing cavity between the second stop part and the end part, the second reversing plug can block and seal the second wastewater inlet when being propped against the end part, the second drainage through hole is opened, and the first reversing plug and the second reversing plug are respectively provided with a magnetic element on one surface facing the end part of the reversing valve;
The inner diameters of the first cylinder body and the second cylinder body are the same, and the first cylinder body and the second cylinder body are respectively sleeved at the two end parts of the reversing valve seat in a sealing way through the totally-unclosed end parts;
The cylinder piston comprises a first piston, a second piston and a cylinder connecting rod; the first piston is arranged in the cylinder cavity of the first cylinder body and can move between the first sealing end cover and the reversing valve seat to divide the cylinder cavity of the first cylinder body into a first fresh sea water area and a first high-pressure waste water area, and the first drainage through hole is communicated with the first high-pressure waste water area; the second piston is arranged in the cylinder cavity of the second cylinder body and can move between the second sealing end cover and the reversing valve seat to divide the cylinder cavity of the second cylinder body into a second fresh sea water area and a second high-pressure waste water area, and the second drainage through hole is communicated with the second high-pressure waste water area; two ends of the reversing cavity are respectively communicated to the first high-pressure wastewater area and the second high-pressure wastewater area; the cylinder connecting rod penetrates through the axle center of the reversing valve seat and is respectively connected with a first piston and a second piston, one surfaces of the first piston and the second piston, which face the reversing valve seat, are provided with magnetic elements, and the magnetic elements repel the magnetic elements on the first reversing plug and the second reversing plug;
the four check valves are respectively connected to the first water inlet, the first water outlet, the second water inlet and the second water outlet;
The water outlet of the pressure pump is connected with the two check valves of the first water inlet and the second water inlet in parallel;
The filter element is characterized in that one end part of the filter element is provided with a fresh seawater inlet, the other end part of the filter element is provided with a pure water outlet and a high-pressure wastewater outlet, the fresh seawater inlet is connected with two check valves of the first water outlet and the second water outlet in parallel, and the high-pressure wastewater outlet is connected with the first wastewater inlet and the second wastewater inlet in parallel.
In a further development, the reversing valve comprises a plurality of reversing valves, and is circumferentially distributed in the reversing valve seat.
In a further development, the first cylinder, the second cylinder and the reversing valve seat have the same outer diameter.
In a further development, the inner wall of the reversing chamber facing outwards is flush with the inner walls of the first cylinder and the second cylinder.
In a further development, the filter element is a reverse osmosis filter element.
Compared with the prior art, the invention has the beneficial effects that: the first cylinder, the second cylinder and the reversing valve seat are connected in a split mode, the structure is simple, the technical difficulty is low, the cost can be effectively reduced, faults are not easy to occur, high-pressure waste water filtered by the filter element is discharged into the reversing cavity in the reversing valve, the reversing piston is pushed to realize reversing in the process of moving the cylinder piston due to magnetic repulsion between the reversing piston and the cylinder piston, the high-pressure waste water in the reversing cavity can enter the first high-pressure waste water area/the second high-pressure waste water area, the cylinder piston is pushed in an auxiliary mode, so that energy consumption of the pressure pump 80 is reduced, 95% -98% of energy conversion efficiency can be recovered, and the energy conversion efficiency is high.
The invention is described in further detail below with reference to the attached drawings and detailed description:
[ description of the drawings ]
FIG. 1 is a prior art schematic diagram I;
FIG. 2 is a second prior art schematic;
FIG. 3 is a prior art schematic diagram III;
FIG. 4 is a schematic diagram of a fourth prior art;
FIG. 5 is a prior art schematic diagram V;
FIG. 6 is a prior art schematic diagram six;
FIG. 7 is a schematic diagram of a first embodiment of the present invention;
FIG. 8 is a second schematic structural diagram of the first embodiment of the present invention;
fig. 9 is a schematic structural diagram of a second embodiment of the present invention.
[ Detailed description ] of the invention
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout.
The orientations shown in the drawings are not to be construed as limiting the specific scope of the invention, and only as a reference to the preferred embodiments, variations in the positions or numbers of product components shown in the drawings or structural simplifications may be made.
The terms "connected" and "connected" as used in the specification and illustrated in the drawings refer to the components as being "connected" to each other, and are understood to mean fixedly connected or detachably connected or integrally connected; the connection can be directly connected or connected through an intermediate medium, and a person skilled in the art can understand the connection relationship according to specific situations to obtain a screwing or riveting or welding or clamping or embedding mode and the like to replace the modes in different embodiments in a proper mode.
Terms of orientation such as up, down, left, right, top, bottom, and the like, as well as orientations shown in the drawings, may be used for direct contact or contact by additional features between the components; such as directly above and obliquely above, or it merely represents above the other; other orientations may be understood by analogy.
The materials for manufacturing the components with the solid shapes shown in the specification and the drawings can be metal materials or nonmetal materials or other composite materials; the machining process adopted for the parts with solid shapes can be stamping, forging, casting, wire cutting, laser cutting, casting, injection molding, milling, three-dimensional printing, machining and the like; those skilled in the art can adaptively select or combine according to different processing conditions, costs and precision, but are not limited to the above materials and manufacturing processes.
The invention relates to a water treatment energy recovery device, which comprises
The first cylinder 10 includes a cylinder cavity in the first cylinder 10, a first sealing end cover 12 for sealing the end is provided at one axial end of the first cylinder 10, the other end of the first cylinder is not sealed at all, and the first sealing end cover 12 axially penetrates through a first water inlet 13 and a first water outlet 14;
the second cylinder 20 includes a cylinder cavity in the second cylinder 20, a second sealing end cover 22 for sealing the end is provided at one axial end of the second cylinder 20, the other end of the second cylinder is not sealed at all, and the second sealing end cover 22 axially penetrates through a second water inlet 23 and a second water outlet 24;
A reversing valve seat 30, wherein the reversing valve seat 30 has an annular structure; at least one reversing valve is axially arranged in the reversing valve seat 30, the reversing valve comprises a reversing cavity 41, the reversing cavity 41 axially penetrates through the reversing valve seat 30, a low-pressure waste water outlet 46 is arranged in the middle of the reversing cavity 41, which is close to the outer side, a first waste water inlet 44 and a second waste water inlet 45 are arranged on two sides of the reversing cavity 41, and the first waste water inlet 44, the second waste water inlet 45 and the low-pressure waste water outlet 46 radially penetrate through the reversing valve seat 30 from the inner side of the reversing cavity 41 to the outer side of the reversing valve seat 30; a first stop part 42 and a second stop part 43 are arranged between the first wastewater inlet 44 and the second wastewater inlet 45 and between the low-pressure wastewater outlet 46 respectively, and the first stop part 42 and the second stop part 43 radially protrude from the base body of the reversing valve seat 30 to the reversing cavity 41; a first drainage through hole 47 and a second drainage through hole 48 are arranged on the inner side of the reversing cavity 41 opposite to the low-pressure wastewater outlet 43, and the first drainage through hole 47 and the second drainage through hole 48 are respectively arranged at two ends of the reversing cavity 41 and are respectively conducted from the inside of the reversing cavity 41 to the outside of the reversing valve seat 30; a reversing piston is further arranged in the reversing cavity 41, the reversing piston comprises a first reversing plug 51, a second reversing plug 52 and a reversing connecting rod 53, the first reversing plug 51 can move in the reversing cavity 41 between the first stop part 42 and the end part, the first reversing plug 51 can block and close the first waste water inlet 44 when being abutted against the end part, the first drainage through hole 47 is opened, the second reversing plug 52 can move in the reversing cavity 41 between the second stop part 43 and the end part, the second reversing plug 52 can block and close the second waste water inlet 45 when being abutted against the end part, the second drainage through hole 48 is opened, and the first reversing plug 51 and the second reversing plug 52 are respectively provided with a magnetic element 50 on one surface facing the end part of the reversing valve;
The first cylinder 10 and the second cylinder 20 have the same inner diameter, and the first cylinder 10 and the second cylinder 20 are respectively and hermetically sleeved at two ends of the reversing valve seat 30 with completely non-closed ends;
A cylinder piston including a first piston 61, a second piston 62, and a cylinder connecting rod 63; the first piston 61 is arranged in the cylinder cavity of the first cylinder 10 and can move between the first sealing end cover 12 and the reversing valve seat 30 to divide the cylinder cavity of the first cylinder 10 into a first fresh sea water area 11 and a first high-pressure waste water area 15, and the first drainage through hole 47 is communicated with the first high-pressure waste water area 15; the second piston 62 is arranged in the cylinder cavity of the second cylinder 20 and can move between the second sealing end cover 22 and the reversing valve seat 30 to divide the cylinder cavity of the second cylinder 20 into a second fresh sea water area 21 and a second high-pressure waste water area 25, and the second drainage through hole 48 is communicated with the second high-pressure waste water area 25; both ends of the reversing cavity 41 are respectively communicated to the first high-pressure wastewater area 15 and the second high-pressure wastewater area 25; the cylinder connecting rod 63 penetrates through the axle center of the reversing valve seat 30 and is respectively connected with the first piston 61 and the second piston 62, one surface of the first piston 61 and the second piston 62 facing the reversing valve seat 30 is provided with a magnetic element 50, and the magnetic element 50 is repelled with the magnetic elements 50 on the first reversing plug 51 and the second reversing plug 52;
Four check valves 70 connected to the first water inlet 13, the first water outlet 14, the second water inlet 23, and the second water outlet 24, respectively;
A pressure pump 80, wherein the water outlet of the pressure pump 80 is connected in parallel with the two check valves 70 of the first water inlet 13 and the second water inlet 23;
The filter element 90 has a fresh seawater inlet 91 at one end and a pure water outlet 92 at the other end, the fresh seawater inlet 91 being connected in parallel to the two check valves 70 of the first water outlet 14 and the second water outlet 24, and the high-pressure wastewater outlet 93 being connected in parallel to the first wastewater inlet 44 and the second wastewater inlet 45.
In initial use, the filter cartridge 90 can be used to discharge filtered clean pure water through the pure water outlet 92 and high-pressure wastewater through the high-pressure wastewater outlet 93 after filtration is completed by sequentially opening the check valve 70 at the first water inlet 13, closing the check valve 70 at the second water inlet 23, and opening the check valve 70 at the second water inlet 23, so that the pressure pump 80 pushes seawater into the first cylinder 10 from the first water inlet 13 or pushes seawater into the second cylinder 20 from the second water inlet 23, evacuating air in the first cylinder 10 and the second cylinder 20, and then pushing the air into the filter cartridge 90 from the first water outlet 14 or the second water outlet 24, and the high-pressure wastewater is discharged through the high-pressure wastewater outlet 93 and enters the reversing cavity through the first wastewater inlet 44 or the second wastewater inlet 45, respectively.
Assuming that the first piston 61 abuts against the first sealing end cap 12 of the first cylinder 10, the first reversing plug 51 abuts against the end of the reversing chamber 41 adjacent to the first high-pressure wastewater zone 15, the first discharge through hole 47 is opened, the second discharge through hole 48 is plugged, the first wastewater inlet 44 is plugged, the second wastewater inlet 45 is opened, and the second piston 62 abuts against the end of the reversing valve seat 30, at this time, the high-pressure wastewater in the second high-pressure wastewater zone 25 has been discharged through the low-pressure wastewater outlet 46, the high-pressure wastewater generated by the filter cartridge 90 has been injected into the first high-pressure wastewater zone 15 and the wastewater pressure in the first high-pressure wastewater zone 15 is lowered due to the opening of the first discharge through hole 47, becoming low-pressure wastewater (as shown in fig. 8); at this time, since the first fresh sea water region 11 is in a pressure-losing state, the first water inlet 13 is opened, the pressure pump 80 pushes the sea water into the first fresh sea water region 11 of the first cylinder 10 from the first water inlet 13, the first piston 61 starts to move toward the end of the reversing valve seat 30 under the pressure of the fresh sea water, the low-pressure waste water in the first high-pressure waste water region is pumped into the reversing chamber through the first drainage through hole 47, and finally is drained through the low-pressure waste water outlet 46; meanwhile, the second piston 62 is linked with the first piston 61, fresh seawater in the second fresh seawater area 21 is pushed to enter the filter element 90 through the second water outlet 24, after the filter element 90 finishes filtering, pure water which is filtered cleanly is discharged through the pure water outlet 92, high-pressure wastewater is discharged through the high-pressure wastewater outlet 93, the high-pressure wastewater enters the reversing cavity 41 through the open second wastewater inlet 45, and because the reversing cavity 41 is communicated with the second high-pressure wastewater area 25 at this time, the high-pressure wastewater is injected into the second high-pressure wastewater area 25 through the reversing cavity, the high-pressure wastewater begins to fill the second high-pressure wastewater area 25 and assists in pushing the second piston 62, so that the pushing energy of the second piston 62 is enhanced, and the energy-saving effect is achieved; as the first piston 61 approaches and abuts against the end of the reversing valve seat 30, the reversing piston is pushed under the action of the repulsive magnetic element 50, the first reversing plug 51 moves in the direction of the first stopper 42 in the reversing chamber 41 and abuts against the first stopper 42, the second reversing plug 52 abuts against the end of the reversing chamber 41 adjacent to the second high-pressure wastewater zone 25, at this time, the first wastewater inlet 44 is opened, the second wastewater inlet is blocked, the first drain through hole 47 is blocked, and the second drain through hole 48 is opened (as shown in fig. 7).
As the second drain through hole 48 is opened, the pressure of the waste water in the second high-pressure waste water area 25 is reduced to become low-pressure waste water, at this time, the second fresh sea water area 21 is in a pressure-losing state, the second water inlet 23 is opened, the pressure pump 80 pushes the sea water into the second fresh sea water area 21 of the second cylinder 20 from the second water inlet 23, the second piston 62 starts to move towards the end of the reversing valve seat 30 under the pressure of the fresh sea water, the low-pressure waste water in the second high-pressure waste water area 25 is sent into the reversing cavity 41 through the second drain through hole 48 under pressure, and finally is discharged through the low-pressure waste water outlet 46; meanwhile, the first piston 61 is linked with the second piston 62, fresh seawater in the first fresh seawater area 11 is pushed to enter the filter element 90 through the first water outlet 14, after the filter element 90 finishes filtering, pure water which is filtered cleanly is discharged through the pure water outlet 92, high-pressure wastewater is discharged through the high-pressure wastewater outlet 93, the high-pressure wastewater enters the reversing cavity 41 through the open first wastewater inlet 44, and because the reversing cavity 41 is communicated with the first high-pressure wastewater area 15 at this time, the high-pressure wastewater is injected into the first high-pressure wastewater area 15 through the reversing cavity 41, the high-pressure wastewater begins to fill the first high-pressure wastewater area 15 and assists in pushing the first piston 61, so that the pushing energy of the first piston 61 is enhanced, and the energy-saving effect is achieved; as the second piston 62 approaches and abuts against the end of the reversing valve seat 30, the reversing piston is pushed under the influence of the repulsive magnetic element 50, the second reversing plug 52 moves in the direction of the second stop 43 in the reversing chamber 41 and abuts against the second stop 43, the first reversing plug 51 abuts against the end of the reversing chamber 41 adjacent to the first high-pressure waste water area 15, at this time the second waste water inlet 45 is open, the first waste water inlet 44 is blocked, the second drain through hole 48 is blocked, and the first drain through hole 47 is open.
According to the invention, seawater is pumped into the first fresh seawater area 11 and the second fresh seawater area 21 by sequentially switching and opening the first water inlet 13 and the second water inlet 23, and is pushed into the filter element 90 through the second water outlet 24 and the first water outlet 14, high-pressure wastewater generated after filtering the filter element 90 enters the reversing cavity 41, and as the first reversing plug 51/the second reversing plug 52 and the first piston 61/the second piston 62 magnetically repel each other, the first reversing plug 51/the second reversing plug 52 are pushed to realize reversing in the moving process of the first piston 61/the second piston 62, the high-pressure wastewater in the reversing cavity 41 can enter the first high-pressure wastewater area 15/the second high-pressure wastewater area 25 to assist in pushing the first piston 61/the second piston 62, and the fresh seawater in the first fresh seawater area 11 and the second fresh seawater area 21 is pushed into the filter element 90, so that the energy consumption barrel 10, the second barrel 20 and the valve seat 30 of the pressure pump 80 are connected in a split manner, the structure is simple, the technical difficulty is low, the energy consumption can be reduced, the conversion efficiency can not be effectively reduced, and the energy can be converted into the energy is high, and the energy can be recovered by 95% -98%; in addition, the water treatment energy recovery device provided by the invention does not need to use a booster pump or an electromagnetic valve for reversing, so that the faults of parts are greatly reduced, and the cost and maintenance cost of products are greatly reduced.
In the second embodiment shown in fig. 9, the reversing valves include a plurality of reversing valves, and are circumferentially distributed in the reversing valve seat 30, and the plurality of reversing valves can work in cooperation with the first cylinder 10, the second cylinder 20 and the cylinder piston at the same time, so that the energy conversion efficiency can be further increased, and the wastewater drainage amount can be increased.
While the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications can be made therein without departing from the spirit and scope of the invention as defined in the following claims. Accordingly, the detailed description of the disclosed embodiments is to be taken only by way of illustration and not by way of limitation, and the scope of protection is defined by the content of the claims.
Claims (5)
1. A water treatment energy recovery device, characterized by comprising
The first cylinder body comprises a cylinder cavity, a first sealing end cover for sealing the end part is arranged at one axial end part of the first cylinder body, the other end part of the first cylinder body is not sealed at all, and the first sealing end cover axially penetrates through a first water inlet and a first water outlet;
The second cylinder body comprises a cylinder cavity, one axial end part of the second cylinder body is provided with a second sealing end cover for sealing the end part, the other end part of the second cylinder body is not sealed at all, and the second sealing end cover axially penetrates through a second water inlet and a second water outlet;
The reversing valve seat is of an annular structure; at least one reversing valve is axially arranged in the reversing valve seat, the reversing valve comprises a reversing cavity, the reversing cavity axially penetrates through the reversing valve seat, a low-pressure waste water outlet is arranged in the middle of the reversing cavity, which is close to the outer side, a first waste water inlet and a second waste water inlet are arranged on two sides of the reversing cavity, and the first waste water inlet, the second waste water inlet and the low-pressure waste water outlet radially penetrate through the reversing valve seat body from the inner side of the reversing cavity to the outer side of the reversing valve seat; a first stop part and a second stop part are arranged between the first wastewater inlet and the second wastewater inlet and between the first wastewater inlet and the low-pressure wastewater outlet respectively, and the first stop part and the second stop part radially protrude from the reversing valve seat body to the reversing cavity; a first drainage through hole and a second drainage through hole are arranged on the inner side of the reversing cavity opposite to the low-pressure wastewater outlet, and the first drainage through hole and the second drainage through hole are respectively arranged at two ends of the reversing cavity and are respectively communicated from the inside of the reversing cavity to the outside of the reversing valve seat; the reversing piston comprises a first reversing plug, a second reversing plug and a reversing connecting rod, wherein the first reversing plug moves in the reversing cavity between the first stop part and the end part, the first reversing plug blocks and seals the first wastewater inlet when the first reversing plug is propped against the end part, the first drainage through hole is opened, the second reversing plug moves in the reversing cavity between the second stop part and the end part, the second reversing plug blocks and seals the second wastewater inlet when the second reversing plug is propped against the end part, and the second drainage through hole is opened;
The inner diameters of the first cylinder body and the second cylinder body are the same, and the first cylinder body and the second cylinder body are respectively sleeved at the two end parts of the reversing valve seat in a sealing way through the totally-unclosed end parts;
The cylinder piston comprises a first piston, a second piston and a cylinder connecting rod; the first piston is arranged in the cylinder cavity of the first cylinder body, moves between the first sealing end cover and the reversing valve seat to divide the cylinder cavity of the first cylinder body into a first fresh sea water area and a first high-pressure waste water area, and the first drainage through hole is communicated with the first high-pressure waste water area; the second piston is arranged in the cylinder cavity of the second cylinder body, moves between the second sealing end cover and the reversing valve seat and divides the cylinder cavity of the second cylinder body into a second fresh sea water area and a second high-pressure waste water area, and the second drainage through hole is communicated with the second high-pressure waste water area; two ends of the reversing cavity are respectively communicated to the first high-pressure wastewater area and the second high-pressure wastewater area; the cylinder connecting rod penetrates through the axle center of the reversing valve seat and is respectively connected with a first piston and a second piston, one surfaces of the first piston and the second piston, which face the reversing valve seat, are provided with magnetic elements, and the magnetic elements repel the magnetic elements on the first reversing plug and the second reversing plug;
the four check valves are respectively connected to the first water inlet, the first water outlet, the second water inlet and the second water outlet;
The water outlet of the pressure pump is connected with the two check valves of the first water inlet and the second water inlet in parallel;
The filter element is characterized in that one end part of the filter element is provided with a fresh seawater inlet, the other end part of the filter element is provided with a pure water outlet and a high-pressure wastewater outlet, the fresh seawater inlet is connected with two check valves of the first water outlet and the second water outlet in parallel, and the high-pressure wastewater outlet is connected with the first wastewater inlet and the second wastewater inlet in parallel.
2. A water treatment energy recovery device according to claim 1, wherein the reversing valve comprises a plurality of reversing valves and is circumferentially distributed in the reversing valve seat.
3. The water treatment energy recovery device of claim 1, wherein the first cylinder, the second cylinder and the reversing valve seat have the same outer diameter.
4. A water treatment energy recovery device according to claim 1, wherein the outwardly facing inner wall of the reversing chamber is flush with the inner walls of the first and second cylinders.
5. A water treatment energy recovery device according to claim 1, wherein the filter element is a reverse osmosis filter element.
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| CN201810888804.8A CN108840401B (en) | 2018-08-07 | 2018-08-07 | Water treatment energy recovery device |
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| CN116272373B (en) * | 2023-04-06 | 2023-09-15 | 广东海洋大学 | Magnetic force driving type residual pressure energy recovery device and sea water desalination system thereof |
Citations (3)
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|---|---|---|---|---|
| CN201407250Y (en) * | 2009-05-31 | 2010-02-17 | 王世昌 | Joint piston self-pressurization energy recovery pump used for reverse osmosis seawater desalination system |
| US20180071685A1 (en) * | 2016-09-12 | 2018-03-15 | Eten Technology Ltd | Energy-saving water purifying device |
| CN208791255U (en) * | 2018-08-07 | 2019-04-26 | 珠海市荣成科技有限公司 | A kind of water process energy recycle device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201407250Y (en) * | 2009-05-31 | 2010-02-17 | 王世昌 | Joint piston self-pressurization energy recovery pump used for reverse osmosis seawater desalination system |
| US20180071685A1 (en) * | 2016-09-12 | 2018-03-15 | Eten Technology Ltd | Energy-saving water purifying device |
| CN208791255U (en) * | 2018-08-07 | 2019-04-26 | 珠海市荣成科技有限公司 | A kind of water process energy recycle device |
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