CN109179580B - Reverse osmosis membrane pump integrated sea water desalination unit - Google Patents
Reverse osmosis membrane pump integrated sea water desalination unit Download PDFInfo
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- CN109179580B CN109179580B CN201811225768.3A CN201811225768A CN109179580B CN 109179580 B CN109179580 B CN 109179580B CN 201811225768 A CN201811225768 A CN 201811225768A CN 109179580 B CN109179580 B CN 109179580B
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- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 201
- 239000012528 membrane Substances 0.000 title claims abstract description 194
- 239000013535 sea water Substances 0.000 title claims abstract description 147
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 32
- 238000011084 recovery Methods 0.000 claims abstract description 96
- 230000001502 supplementing effect Effects 0.000 claims abstract description 29
- 239000012267 brine Substances 0.000 claims abstract description 25
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 25
- 239000013505 freshwater Substances 0.000 claims abstract description 19
- 239000013589 supplement Substances 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 48
- 230000002093 peripheral effect Effects 0.000 claims description 33
- 230000003068 static effect Effects 0.000 claims description 14
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract 2
- 238000000746 purification Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 8
- 238000010992 reflux Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 6
- 230000003204 osmotic effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 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
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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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
-
- 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
-
- 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
-
- 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
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- 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 provides a reverse osmosis membrane pump integrated sea water desalination unit which comprises a motor, a reverse osmosis membrane group, a sea water high-pressure pump and a fresh water collecting pipeline, wherein the sea water high-pressure pump comprises a pump shell, a main shaft, a pressurizing vortex disc structure, a pressure supplementing vortex disc structure and an energy recycling vortex disc structure, the pressurizing vortex disc structure is arranged to receive original sea water and pressurize the original sea water step by step under the driving of the main shaft, so that high-pressure sea water is provided for the reverse osmosis membrane group, the pressure supplementing vortex disc structure is arranged to supplement the sea water after reverse osmosis and provide the sea water for the next stage of the reverse osmosis membrane group, and the energy recycling vortex disc structure is arranged to receive high-pressure strong brine from the reverse osmosis membrane group and convert the pressure energy of the high-pressure strong brine into kinetic energy of the main shaft and produce low-pressure strong brine. The invention integrates the functions of pressurization, reverse osmosis, pressure compensation and energy recovery, reduces energy consumption, has more compact structure, small occupied area, high water outlet efficiency, few fault points, easy maintenance and long service life of the reverse osmosis membrane group.
Description
Technical Field
The invention relates to the technical field of fluid mechanical engineering, in particular to a reverse osmosis membrane pump integrated sea water desalination unit with a novel structure.
Background
At present, almost all domestic sea water desalination processes adopt reverse osmosis membranes to work in series, and sometimes a novel reverse osmosis membrane integrated purification system adopts reverse osmosis membranes to work in parallel. However, whatever reverse osmosis purification device is used, a high pressure pump is disposed at the inlet thereof to provide the osmotic pressure requirement of the reverse osmosis membrane in the reverse osmosis purification device. However, many of the disadvantages of reverse osmosis purification systems with high pressure pumps are as follows:
Old reverse osmosis membrane tandem operation the process for configuring the high-pressure pump comprises the following steps: the occupied space area is large, and the capital construction investment cost is high; the pressure in the reverse osmosis membrane is gradually decreased, the water yield of the osmosis membrane is gradually decreased, and the separation efficiency is low; the reverse osmosis membrane has different utilization rates and service lives; the reverse osmosis membranes are embedded in the same protective tube, which is not beneficial to monitoring and maintenance.
The novel reverse osmosis membrane integrated purification system is provided with a high-pressure pump process: although the device is provided with two sets of step-by-step pressurizing impellers, the pressure in the system is increased along with the increase of the osmotic pressure required by the reverse osmosis membrane, the water yield of the reverse osmosis membrane is almost consistent, and the separation efficiency is high; the utilization rate of the reverse osmosis membrane is almost equal, and the service life of the reverse osmosis membrane is kept consistent; the reverse osmosis membranes are independent, so that monitoring and maintenance are facilitated, but the occupied space area is slightly larger; the high-pressure pump and the reverse osmosis membrane integrated purification system are both provided with motor drive, so that the wiring difficulty of a circuit is increased, and the automatic control difficulty of the system is increased to a certain extent; the presence of the high pressure pump increases the number of invisible fault points; the driving motors of the high-pressure pump and the reverse osmosis membrane integrated purification system are mutually independent, so that comprehensive utilization of energy sources is not facilitated; the whole system is complex, and is not beneficial to overhaul and maintenance.
Disclosure of Invention
In order to overcome the defects, the invention provides the reverse osmosis membrane pump integrated sea water desalination unit which has the advantages of simple and compact structure, small occupied area and brand new design and is convenient to control and maintain.
The invention aims to optimize and combine a high-pressure pump and a reverse osmosis membrane purification system on the basis of the existing novel reverse osmosis membrane integrated purification system, and the two sets of equipment are combined into one, so that the reverse osmosis membrane pump integrated sea water desalination unit is provided, and the membrane pump is truly integrated.
Therefore, the invention provides a reverse osmosis membrane pump integrated sea water desalination unit, which comprises
A motor;
The multi-stage reverse osmosis membrane sets are arranged to be capable of reverse osmosis of high-pressure seawater and outputting fresh water and reverse osmosis seawater;
The seawater high-pressure pump comprises a pump shell, a main shaft driven by a motor, a multi-stage pressurizing vortex disc structure, a multi-stage pressure supplementing vortex disc structure and a multi-stage energy recovery vortex disc structure which are sequentially installed through the main shaft, wherein the multi-stage pressurizing vortex disc structure is arranged to be capable of receiving original seawater from outside and pressurizing the original seawater step by step under the driving of the main shaft, so that high-pressure seawater is provided for a first-stage reverse osmosis membrane group in the multi-stage reverse osmosis membrane group, the multi-stage pressure supplementing vortex disc structure is arranged to be capable of supplementing reverse osmosis seawater from the corresponding one-stage reverse osmosis membrane group under the driving of the main shaft, and is provided for a next-stage reverse osmosis membrane group, and the multi-stage energy recovery vortex disc structure is arranged to be capable of receiving high-pressure strong brine from a last-stage reverse osmosis membrane group of the multi-stage reverse osmosis membrane group, and converting the pressure energy of the high-pressure strong brine into kinetic energy of the main shaft and producing low-pressure strong brine;
And the fresh water collecting pipeline is communicated with each stage of reverse osmosis membrane group to collect fresh water.
According to the invention, the seawater high-pressure pump integrates the functions of boosting, supplementing pressure and recovering energy, so that the energy consumption is reduced, the defects that the high-pressure pump is required to be additionally arranged and the reverse osmosis membrane component and the high-pressure pump are respectively provided with the motor in the prior art are overcome, the system structure is more compact, the occupied area is smaller, the energy utilization rate of the motor is high, the water outlet efficiency is high, the failure points are few, the overhaul and the maintenance are easy, and the service life of the reverse osmosis membrane group is prolonged because the reverse osmosis membrane group can work under proper pressure.
Further, the multistage supercharging vortex plate structure is provided with an original seawater inlet and a high-pressure seawater outlet; each stage of pressure supplementing vortex disc structure is provided with a reverse osmosis reflux port and a pressure supplementing rear output port; the multistage energy recovery vortex plate structure is provided with a reverse osmosis opposite interface for receiving high-pressure strong brine and a recovery seawater discharge port for outputting low-pressure strong brine outwards; each stage of reverse osmosis membrane group of the multistage reverse osmosis membrane group is arranged to be capable of reverse osmosis of high-pressure seawater to obtain fresh water, and is provided with a membrane group inlet and a membrane group outlet, wherein the membrane group inlet of the first stage of reverse osmosis membrane group in the multistage reverse osmosis membrane group is communicated with the high-pressure seawater outlet of the multistage supercharging vortex disc structure, the membrane group outlet of the last stage of reverse osmosis membrane group is communicated with the reverse osmosis butt joint port of the multistage energy recovery vortex disc structure, the other membrane group outlets of the multistage reverse osmosis membrane group are respectively communicated with the reverse osmosis backflow port corresponding to the multistage supercharging vortex disc structure, and the other membrane group inlets are respectively communicated with the post-supercharging output port corresponding to the multistage supercharging vortex disc structure.
Still further, the membrane group outlet of the first-stage reverse osmosis membrane group is communicated with the reverse osmosis reflux port of the first-stage pressure compensating vortex disk structure of the multi-stage pressure compensating vortex disk structure, the post-pressure compensating outlet of the first-stage pressure compensating vortex disk structure is communicated with the membrane group inlet of the second-stage reverse osmosis membrane group of the multi-stage reverse osmosis membrane group, the membrane group outlet of the second-stage reverse osmosis membrane group is communicated with the reverse osmosis reflux port of the second-stage pressure compensating vortex disk structure of the multi-stage pressure compensating vortex disk structure, the post-pressure compensating outlet of the second-stage pressure compensating vortex disk structure is communicated with the membrane group inlet of the third-stage reverse osmosis membrane group of the multi-stage reverse osmosis membrane group, and so on until the post-pressure compensating outlet of the last-stage pressure compensating vortex disk structure of the multi-stage pressure compensating vortex disk structure is communicated with the membrane group inlet of the last-stage reverse osmosis membrane group.
Still further, each of the multi-stage pressurizing scroll structure, the multi-stage pressure compensating scroll structure and the multi-stage energy recovering scroll structure includes a fixed scroll and a movable scroll engaged with the fixed scroll to form a closed volume, adjacent two-stage scroll structures are arranged in such a manner that the fixed scroll and the fixed scroll are mounted back to back or the movable scroll and the movable scroll are mounted back to back, and each movable scroll is mounted on the main shaft through an eccentric shaft sleeve and is provided with an anti-rotation structure.
The axial forces generated by every two groups of dynamic and static vortex plates can be balanced by the back-to-back installation of the same type of vortex plates (namely, the static vortex plate and the static vortex plate or the dynamic vortex plate and the dynamic vortex plate); moreover, as the vortex teeth of the vortex disc structure are processed by adopting a special process and a special milling cutter, the small running clearance and small leakage can be ensured, thereby ensuring a higher compression ratio; the anti-rotation structure is arranged to prevent the stop vortex disc from rotating.
Still further, a valve plate is arranged between the fixed vortex plate and the fixed vortex plate which are arranged back to back, a cross ring seat is arranged between the movable vortex plate and the movable vortex plate which are arranged back to back, the anti-rotation structure is a cross ring, and two sides of the cross ring are respectively connected with the cross ring seat and the movable vortex plate in a sliding way.
Because the fixed vortex plate is arranged back to back, and the openings of the runners on the fixed vortex plate are not usually positioned at the same position, the arrangement of the valve plate can be used for changing the flow direction of fluid and ensuring the smooth flow of the fluid between the adjacent two-stage vortex plate structures.
Still further, in the multi-stage pressurizing scroll structure, each static scroll is provided with a central runner communicated with the center of the corresponding enclosed volume and a peripheral runner communicated with the periphery of the enclosed volume, the static scroll of the former stage pressurizing scroll structure of the adjacent two-stage pressurizing scroll structure is provided with a low-pressure fluid inlet communicated with the peripheral runner of the static scroll, the static scroll of the latter stage pressurizing scroll structure is provided with a high-pressure fluid outlet, the low-pressure fluid inlet in the first stage pressurizing scroll structure of the multi-stage pressurizing scroll structure forms an original sea water inlet, and the high-pressure fluid outlet in the last stage pressurizing scroll structure forms the high-pressure sea water outlet; the flow distribution plate is provided with a front grading flow passage and a rear grading flow passage, the front grading flow passage is respectively communicated with a central flow passage in the front stage supercharging vortex plate structure and a peripheral flow passage in the rear stage supercharging vortex plate structure, and the rear grading flow passage is respectively communicated with the central flow passage in the rear stage supercharging vortex plate structure and a high-pressure fluid outlet on a static vortex plate of the rear stage supercharging vortex plate structure; the cross ring seat is provided with a conveying runner, one end of the conveying runner is communicated with a high-pressure fluid outlet of the next-stage supercharging vortex disc structure, and the other end of the conveying runner is communicated with a low-pressure fluid inlet in a previous-stage supercharging vortex disc structure of the next adjacent two-stage supercharging vortex disc structure.
Through the structure, the original seawater entering the multi-stage supercharging vortex disc structure can smoothly enter the rear-stage supercharging vortex disc structure from the front-stage supercharging vortex disc structure so as to be pressurized continuously; moreover, as the vortex plate structure is adopted for fluid compression, the change of the volume in the compression cavity is continuous, so that the change of driving moment and the change of power are small, thereby reducing operation vibration, reducing noise and improving operation reliability.
Still further, the multistage pressure compensating vortex disc structures are installed in series, each stage of pressure compensating vortex disc structure of the adjacent two stages of pressure compensating vortex disc structures is provided with a flow distribution channel, in each stage of pressure compensating vortex disc structure, the fixed vortex disc is provided with a central flow channel communicated with the center of the corresponding enclosed volume and a peripheral flow channel communicated with the periphery of the enclosed volume, and the fixed vortex disc is also provided with a reverse osmosis backflow port communicated with the peripheral flow channel and a pressure compensating rear output port communicated with the central flow channel through the corresponding flow distribution channel.
Through the arrangement of the structure, each stage of pressure supplementing vortex disc structure can supplement pressure for reverse osmosis seawater entering the structure; moreover, as the vortex plate structure is adopted for fluid compression, the change of the volume in the compression cavity is continuous, so that the change of driving moment and the change of power are small, thereby reducing operation vibration, reducing noise and improving operation reliability.
Still further, in the multi-stage energy recovery vortex disc structure, each fixed vortex disc is provided with a central runner communicated with the center of the corresponding closed volume and a peripheral runner communicated with the periphery of the closed volume, the fixed vortex disc of the former stage energy recovery vortex disc structure of each adjacent two-stage energy recovery vortex disc structure is provided with a high-pressure fluid inlet, the high-pressure fluid inlet on the fixed vortex disc of the first stage vortex disc structure of the multi-stage energy recovery vortex disc structure forms a reverse osmosis opposite interface, and the peripheral runner on the fixed vortex disc of the last stage energy recovery vortex disc structure is communicated with a recovery seawater discharge port; the front grading flow passage is respectively communicated with a high-pressure fluid inlet and a central flow passage in a front-stage energy recovery vortex disc structure of the adjacent two-stage energy recovery vortex disc structure, and the rear grading flow passage is respectively communicated with a peripheral flow passage in the front-stage energy recovery vortex disc structure and a central flow passage in a rear-stage energy recovery vortex disc structure of the adjacent two-stage energy recovery vortex disc structure; the cross ring seat is provided with a conveying runner, one end of the conveying runner is communicated with a peripheral runner of the next-stage energy vortex disc structure, and the other end of the conveying runner is communicated with a high-pressure fluid inlet of a previous-stage energy recovery vortex disc structure of the next adjacent two-stage energy recovery vortex disc structure.
Through the structure, high-pressure strong brine firstly enters the center of the closed volume of the first-stage energy recovery vortex disc structure, so that the movable vortex disc of the first-stage energy recovery vortex disc structure is driven to rotate for first depressurization, then is sent out through the periphery of the closed volume of the first-stage energy recovery vortex disc structure, then enters the center of the closed volume of the second-stage energy recovery vortex disc structure, so that the movable vortex disc of the second-stage energy recovery vortex disc structure is driven to rotate and perform second depressurization, then is output through the periphery of the closed volume of the second-stage energy recovery vortex disc structure, then enters the center of the closed volume of the third-stage energy recovery vortex disc structure, and then is subjected to stage depressurization by analogy in sequence, and finally low-pressure strong brine is obtained.
Still further, above-mentioned integrative sea water desalination unit of reverse osmosis membrane pump still includes the counter weight dish, and this counter weight dish sets up to the eccentric structure opposite with eccentric shaft sleeve.
The counterweight plate can be used for balancing centrifugal inertia force generated by the eccentric shaft sleeve.
Still further, the both ends of main shaft are supported by the bearing frame, all install the end cover between bearing frame and the first stage pressure boost vortex disk structure of multistage pressure boost vortex disk structure and between bearing frame and the last stage energy recovery vortex disk structure of multistage energy recovery vortex disk structure, all install anti-rotation structure between the movable vortex disk in the first stage pressure boost vortex disk structure and corresponding end cover and between movable vortex disk in the last stage energy recovery vortex disk structure and corresponding end cover.
The arrangement of the end cover plays a role in sealing and protecting the multi-stage vortex disc structure on one hand and plays a role in installing an anti-rotation structure for the movable vortex disc on the other hand.
Still further, the anti-rotation structure is a cross ring, the movable vortex plate and the end cover are both provided with cross ring sliding grooves, and the cross ring is respectively connected in the cross ring sliding grooves of the movable vortex plate and the cross ring sliding grooves of the end cover in a sliding manner at two sides of the cross ring.
Through the structure, the movable vortex plate can only move along a fixed track and cannot rotate.
Still further, the number of stages of the multistage pressurizing scroll structure is determined by the magnitude of the input pressure required by the first stage reverse osmosis membrane group; the number of stages of the multi-stage energy recovery scroll structure is determined by the magnitude of the output pressure from the reverse osmosis membrane group of the last stage.
For a multi-stage booster scroll structure, the operating pressure depends on the load, namely the pressure requirement of the multi-stage reverse osmosis module, but because the upper limit of the pressure pumped by the booster scroll structure can be limited by the requirement of the meshing gap between the booster scrolls and the requirement of the strength of materials and the tightness of a mechanism, the upper limit of the pressure of the pump can be increased by increasing the stage number of the booster scroll structure; for the multi-stage energy recovery vortex disc structure, the number of stages of the energy recovery vortex disc structure can be increased or decreased appropriately according to the pressure of the high-pressure concentrated brine introduced into the multi-stage energy recovery vortex disc structure, if the pressure is high, the number of stages of the energy recovery vortex disc structure is increased, and if the pressure is low, the number of stages of the energy recovery vortex disc structure is decreased.
Further, each stage of reverse osmosis membrane group comprises a protection pipe and a reverse osmosis membrane positioned in the protection pipe.
Further, the reverse osmosis membrane pump integrated sea water desalination unit further comprises an installation seat, wherein the installation seat comprises a base and a bracket positioned on the base, and each stage of reverse osmosis membrane unit is arranged on the bracket.
Further, the reverse osmosis membrane pump integrated seawater desalination unit further comprises a seawater connecting pipeline, and the seawater connecting pipeline is arranged between the seawater high-pressure pump and the multistage reverse osmosis membrane group.
Further, the reverse osmosis membrane pump integrated seawater desalination unit further comprises a cartridge filter having an original seawater inlet, the cartridge filter being arranged to filter the original seawater and for inputting the seawater to the seawater high-pressure pump through the original seawater inlet.
Still further, the original seawater inlet is provided with a filtering device.
Through the setting of filter equipment, can prevent effectively that great granule impurity from getting into sea water desalination high-pressure pump and appearing the excessive wearing and tearing to vortex structure.
These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter.
Drawings
The construction and further objects and advantages of the present invention will be better understood from the following description taken in conjunction with the accompanying drawings, wherein like reference numerals identify like elements:
FIG. 1 is a schematic perspective view of a reverse osmosis membrane pump integrated desalination unit according to one embodiment of the invention;
FIG. 2 is a top view of the reverse osmosis membrane pump integrated desalination unit of FIG. 1;
FIG. 3 is a view of the reverse osmosis membrane pump integrated desalination unit of FIG. 2 as seen in the S direction;
FIG. 4 is a view of the reverse osmosis membrane pump integrated desalination unit of FIG. 2 as seen in the direction T;
FIG. 5 is a sectional view of the internal structure of the high-pressure seawater pump of the integrated reverse osmosis membrane pump desalination unit of FIG. 1, also showing the reverse osmosis membrane module to clearly show the relationship between the reverse osmosis membrane module and the high-pressure seawater pump;
FIG. 6 is an enlarged view of a multi-stage booster scroll structure of the seawater high pressure pump shown in FIG. 5;
FIG. 7 is an enlarged view of a multistage pressure compensating scroll structure of the seawater high pressure pump shown in FIG. 5;
Fig. 8 is an enlarged view of a multistage energy recovery scroll structure of the seawater high pressure pump shown in fig. 5.
Detailed Description
Specific embodiments of the present invention will be described below with reference to the accompanying drawings. However, it is to be understood that the embodiments disclosed herein are merely exemplary of the invention, which may be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately manner, including employing the various features disclosed herein in connection with features that may not be explicitly disclosed.
It should be noted that the directional representations of structures and/or actions, such as "upper," "lower," "left," "right," "front," "back," etc., used to explain various portions of the disclosed embodiments are not absolute, but rather relative. These representations are appropriate when the various portions of the disclosed embodiments are located in the positions shown in the figures. These representations are also changed according to the change in the position or frame of reference of the disclosed embodiments if the position or frame of reference of the disclosed embodiments is changed.
As shown in fig. 1 to 4, the reverse osmosis membrane pump-integrated seawater desalination plant according to one embodiment of the present invention includes a motor 100, a seawater high pressure pump 200, a multistage reverse osmosis membrane module 300, a cartridge filter 400, a seawater connection line 600, a fresh water collection line 700, and a mounting base 800. Each of the reverse osmosis membrane groups 300 is configured to reverse-permeate high-pressure seawater and output fresh water and reverse-permeated seawater, and each of the reverse osmosis membrane groups 300 includes a protection pipe 301 and a reverse osmosis membrane (not shown) located in the protection pipe 301; the cartridge filter 400 has an original seawater inlet A2, and the cartridge filter 400 is configured to filter the original seawater and to input the seawater-high-pressure pump 200 with the seawater through the original seawater inlet A2; the seawater connecting pipeline 600 is arranged between the seawater high-pressure pump 200 and the multi-stage reverse osmosis membrane group 300; the fresh water collecting pipeline 700 is communicated with each stage of reverse osmosis membrane group 300 to collect fresh water and is provided with a fresh water outlet C2; the mounting base 800 comprises a base 801 and a bracket 803 positioned on the base 801, wherein each stage of reverse osmosis membrane set 300 is arranged on the bracket 803.
As shown in fig. 3, the operation of the present embodiment is briefly described as follows: the seawater firstly enters the reverse osmosis membrane pump integrated seawater desalination unit through an original seawater inlet A2 on the cartridge filter 400, is filtered by the cartridge filter 400 and is sucked into the reverse osmosis membrane pump integrated seawater desalination unit through the high-pressure seawater pump 200, the seawater is introduced into the reverse osmosis membrane pump 300 through a seawater connecting pipeline 600 after being pressurized, a part of fresh water can be separated out through the reverse osmosis membrane pump 300, the fresh water can flow out of a fresh water outlet C2 after being collected through a fresh water collecting pipeline 700, meanwhile, the seawater after reverse osmosis, namely the residual seawater, is introduced into other reverse osmosis membranes 300 through the seawater connecting pipeline 600 after being subjected to pressure compensation for multiple times, and the residual high-pressure strong brine after being subjected to the permeation of the multistage reverse osmosis membrane pump 300 is introduced into the seawater high-pressure pump 200 through the seawater connecting pipeline 600 and is discharged through a strong seawater outlet B2 after being subjected to energy recovery in the seawater high-pressure pump 200.
The seawater high-pressure pump 200 is a core component of the present invention, and as shown in fig. 5, integrates functions of pressurizing, pressure supplementing, flow distribution and energy recovery. The seawater high-pressure pump 200 includes a pressurizing region (composed of a multi-stage pressurizing scroll structure), a pressure compensating region (composed of a multi-stage pressure compensating scroll structure), and an energy recovering region (composed of a multi-stage energy recovering scroll structure) according to the gist of the present invention. The pressurizing area can meet the pressure required by the reverse osmosis membrane assembly 300, high-pressure seawater is provided to enter the reverse osmosis membrane assembly 300, the water pressure is reduced after the seawater passes through the first-stage reverse osmosis membrane assembly 300, the salt concentration of the seawater is increased, and the reverse osmosis operation of the next stage can be normally performed only by higher osmotic pressure; the pressure compensation area timely compensates the pressure of the relatively concentrated seawater separated out by the upper-stage reverse osmosis membrane group 300 to ensure that the pressure reaches the osmotic pressure required by the operation of the lower-stage reverse osmosis membrane group 300, the pressure compensation can be realized only by carrying out multistage pressure compensation through the multistage reverse osmosis membrane group 300, and different output can be easily obtained by increasing and decreasing the 300 stages of the reverse osmosis membrane group; the energy recovery area is a device for converting high-pressure strong brine generated after sea water desalination into low-pressure strong brine, and converting pressure energy into kinetic energy for energy recovery, and energy conservation and consumption reduction are realized, wherein the energy recovery device is driven by the motor 100, is driven by the pressure of the high-pressure strong brine after sea water desalination, and converts the pressure energy into effective shaft work.
As shown in fig. 5, the seawater high-pressure pump 200 includes a lower bearing housing 10, an upper bearing housing 12, a fixed scroll 2, a port plate 3, a movable scroll 4, a cross ring 5, an eccentric sleeve 6, a cross ring seat 7, a lower end cover 80, an upper end cover 82, and a main shaft 9. The fixed vortex plate 2 and the movable vortex plate 4 are arranged in pairs, each pair of the fixed vortex plate 2 and the movable vortex plate 4 form a first-stage vortex plate structure, and the movable vortex plate 4 is meshed with the fixed vortex plate 2 to form a closed volume 24. The main shaft 9 is driven by a motor 100, and in this embodiment, the seawater-high-pressure pump 200 is vertically arranged, and the motor 100 is located outside a pump housing 201 (see fig. 1) of the seawater-high-pressure pump 200 and is installed at the upper end of the main shaft 9 near the energy recovery zone side.
As further shown in fig. 5, the seawater high-pressure pump includes a multi-stage pressurizing scroll structure 11, a multi-stage pressure compensating scroll structure 13, and a multi-stage energy recovery scroll structure 15, which are installed in order through the main shaft 9.
In this embodiment, as shown in fig. 5, whether it is a multi-stage supercharging scroll structure 11, a multi-stage pressure compensating scroll structure 13, or a multi-stage energy recovery scroll structure 15, the scroll structures of these structures are all arranged such that two adjacent-stage scroll structures adopt either the movable scroll 4 or the fixed scroll 2 mounted back to back, and the function of designing two adjacent movable scrolls is that: 1) The cross ring 5 can share the same cross ring seat 7, thus greatly reducing the volume, simplifying the structure and reducing the cost; 2) Such back-to-back mounting allows the axial forces generated by each two sets of orbiting scrolls to be balanced against each other. For the orbiting scroll 4 at both ends, the cross ring 5 used therein may be mounted to the lower and upper covers 80 and 82. It will be appreciated that the port plate 3, which is located between the two static plates 2, serves to change the direction of the water flow.
In addition, in the present embodiment, the seawater-high-pressure pump 200 may further include a weight plate (not shown) provided in an eccentric structure opposite to the eccentric sleeve 6 as needed to function as a weight balance.
As shown in fig. 5, in the present embodiment, the multi-stage supercharging vortex plate structure 11 includes first to fourth stage vortex plate structures from left to right. The four-stage pressurizing scroll structure 11 is configured to be capable of receiving the raw seawater from the outside, in this embodiment, the filtered raw seawater from the cartridge filter 400, and pressurizing the raw seawater step by the driving of the main shaft 9, thereby providing the high-pressure seawater to the first-stage reverse osmosis membrane group 300 of the multi-stage reverse osmosis membrane group 300; the multistage pressure compensating scroll structure 13 includes fifth to eighth stage scroll structures from left to right, and is provided with: under the drive of the main shaft 9, the pressure supplementing vortex disc structure of each stage supplements the pressure of the reverse osmosis seawater from the corresponding reverse osmosis membrane group of the stage, and provides the reverse osmosis water for the next reverse osmosis membrane group; the multi-stage energy recovery scroll structure 15 includes ninth to fourteenth scroll structures from left to right, i.e., first to sixth scroll structures from right to left, which are configured to be able to receive high-pressure strong brine from the last stage reverse osmosis membrane group 300 of the multi-stage reverse osmosis membrane group 300, and to be able to convert pressure energy of the high-pressure strong brine into kinetic energy of the main shaft 9 and to produce low-pressure strong brine.
As shown in fig. 5, and referring to fig. 6, the four-stage booster scroll structure 11 is provided with an original seawater inlet a and a high-pressure seawater outlet B. As shown in fig. 5, and referring to fig. 7, each stage of the pressure compensating scroll structure 13 has a reverse osmosis return port and a post-pressure compensating output port, in this embodiment, the reverse osmosis return port of the first stage of the pressure compensating scroll structure 13 is denoted by C, the post-pressure compensating output port is denoted by D, the reverse osmosis return port of the second stage of the pressure compensating scroll structure 13 is denoted by E, the post-pressure compensating output port is denoted by F, the reverse osmosis return port of the third stage of the pressure compensating scroll structure 13 is denoted by G, the post-pressure compensating output port is denoted by H, and the reverse osmosis return port of the fourth stage of the pressure compensating scroll structure 13 is denoted by I, and the post-pressure compensating output port is denoted by J. As shown in fig. 5, and referring to fig. 8, the six-stage energy recovery scroll structure 15 is provided with a reverse osmosis opposite port K for receiving high-pressure strong brine and a recovery seawater discharge port L for externally outputting low-pressure strong brine.
As further shown in fig. 5, each of the five-stage reverse osmosis membrane modules 300 is configured to reverse osmosis high-pressure seawater out of fresh water, and has a module inlet and a module outlet, which are in communication with the high-pressure seawater pump 200 through a seawater connection line 600. Specifically, the membrane group inlet of the first-stage reverse osmosis membrane group 300 is communicated with the high-pressure seawater outlet B on the fourth-stage pressurizing scroll structure 11, the membrane group outlet of the last-stage reverse osmosis membrane group 300 is communicated with the reverse osmosis opposite interface K of the six-stage energy recovery scroll structure 15, the other membrane group outlets are respectively communicated with the reverse osmosis reflux ports corresponding to the four-stage pressure supplementing scroll structure 13, and the other membrane group inlets are respectively communicated with the corresponding pressure supplementing rear output ports on the four-stage pressure supplementing scroll structure 13.
As shown in fig. 5, specifically, the communication manner between the other membrane group outlet and the membrane group inlet in this embodiment is as follows: the membrane group outlet of the first-stage reverse osmosis membrane group 300 is communicated with the reverse osmosis reflux port C of the first-stage pressure supplementing vortex disk structure 13, the post-pressure supplementing outlet D of the first-stage pressure supplementing vortex disk structure 13 is communicated with the membrane group inlet of the second-stage reverse osmosis membrane group 300, the membrane group outlet of the second-stage reverse osmosis membrane group 300 is communicated with the reverse osmosis reflux port E of the second-stage pressure supplementing vortex disk structure 13, the post-pressure supplementing outlet F of the second-stage pressure supplementing vortex disk structure 13 is communicated with the membrane group inlet of the third-stage reverse osmosis membrane group 300, the membrane group outlet of the third-stage pressure supplementing vortex disk structure 13 is communicated with the membrane group inlet of the fourth-stage reverse osmosis membrane group 300, the membrane group outlet of the fourth-stage pressure supplementing vortex disk structure 300 is communicated with the reverse osmosis reflux port I of the last-stage reverse osmosis vortex disk structure 13, and the post-pressure supplementing outlet J of the fourth-stage pressure supplementing vortex disk structure 13 is communicated with the membrane group inlet of the fifth-stage reverse osmosis membrane group 300.
As shown in fig. 6, in the present embodiment, the engaging teeth of the fixed scroll 2 and the engaging teeth of the orbiting scroll 4 in each stage of the pressurizing scroll structure 11 are engaged with each other to form a closed volume 24 for compressing fluid. These booster scroll structures 11 are arranged such that the orbiting scroll 4 is rotated by the main shaft 9, so that the low-pressure fluid, i.e., raw seawater, which has entered the seawater high-pressure pump 200 through the raw seawater inlet a is pressurized into high-pressure fluid, i.e., high-pressure seawater, after passing through the four-stage booster scroll structures 11, and then outputted to the first-stage reverse osmosis membrane group 300 (see fig. 5) through the high-pressure seawater outlet B on the last-stage booster scroll structure 11. The multi-stage supercharging vortex plate structure is of a 'shaft penetrating series connection' structure, and can achieve high-pressure output of seawater.
As shown in fig. 6, in the multistage pressure-increasing scroll structure 11, each fixed scroll 2 is provided with a center flow passage 21 communicating with the center of the corresponding enclosed volume 24 and a peripheral flow passage 23 communicating with the periphery of the enclosed volume 24. The fixed scroll 2 of the previous stage of the adjacent two-stage pressure-increasing scroll structure 11 is provided with a low-pressure fluid inlet (in the first stage pressure-increasing scroll structure 11, the low-pressure fluid inlet is also called an original sea water inlet a, in the other stage pressure-increasing scroll structure 11, i.e., in the third stage pressure-increasing scroll structure 11, the low-pressure fluid inlet is denoted by numeral 20) which communicates with the peripheral flow passage 23 of the fixed scroll 2, and the fixed scroll 2 of the next stage pressure-increasing scroll structure 11 is provided with a high-pressure fluid outlet (in the last stage, i.e., the fourth stage pressure-increasing scroll structure 11, the high-pressure fluid outlet is also called a high-pressure sea water outlet B, in the other stage pressure-increasing scroll structure 11, i.e., in the second stage pressure-increasing scroll structure 11, the high-pressure fluid outlet is denoted by numeral 22).
As shown in fig. 6, in the four-stage booster scroll structure 11, two valve plates 3 are respectively disposed between the first and second stage booster scroll structures and between the third and fourth booster scroll structures, and each valve plate 3 is provided with a front stage runner 31 and a rear stage runner 33. Taking the valve plate 3 between the first stage supercharging vortex disc structure and the second stage supercharging vortex disc structure as an example, the front stage runner 31 on the valve plate is respectively communicated with the central runner 21 in the first stage supercharging vortex disc structure 11 and the peripheral runner 23 in the second stage supercharging vortex disc structure 11, and the rear stage runner 33 is respectively communicated with the central runner 21 in the second stage supercharging vortex disc structure 11 and the high-pressure fluid outlet 22 on the static vortex disc 2 of the second stage supercharging vortex disc structure 11; the cross ring seat 7 is provided with a conveying flow passage 70, one end of the conveying flow passage 70 is communicated with the high-pressure fluid outlet 22 of the second-stage supercharging vortex disk structure 11, and the other end of the conveying flow passage is communicated with the low-pressure fluid inlet 20 in the first-stage supercharging vortex disk structure 11, namely the third-stage supercharging vortex disk structure 11, of the next adjacent two-stage supercharging vortex disk structure 11.
As shown in fig. 6, and referring to fig. 5, raw seawater enters the four-stage pressurizing scroll structure 11 of the seawater-high pressure pump 200 from the raw seawater inlet a, firstly enters the closed volume 24 of the first-stage pressurizing scroll structure 11 through the peripheral flow passage 23, is pressurized after passing through the first-stage pressurizing scroll structure 11, and then is ejected from the central flow passage 21 on the fixed scroll 2; then enters the second-stage supercharging vortex disc structure 11 on the right side through the front stage flow distribution channel 31 on the valve plate 3, namely enters the second-stage supercharging vortex disc structure 11 through the peripheral flow channel 23 on the static vortex disc 2 of the second-stage supercharging vortex disc structure 11; after being pressurized by the second-stage pressurizing vortex disc structure 11, seawater is ejected out through a central runner 21 on the fixed vortex disc 2 of the second-stage pressurizing vortex disc structure 11, enters a rear-stage flow distribution runner 33 of the valve plate 3, enters a low-pressure fluid inlet 20 of the right third-stage pressurizing vortex disc structure 11 through a high-pressure fluid outlet 22 on the fixed vortex disc 2 of the second-stage pressurizing vortex disc structure 11 and a runner 70 on the cross ring seat 7, and then enters the third-stage vortex disc structure through a peripheral runner 23 of the third-stage pressurizing vortex disc structure 11; after being pressurized by the third-stage pressurizing scroll structure 11, the seawater is ejected out through the central flow passage 21 of the third-stage pressurizing scroll structure 11; then enters the peripheral flow passage 23 of the fourth-stage supercharging vortex disk structure 11 on the right side through the front stage flow distribution passage 31 on the valve plate 3, and enters the enclosed volume 24 of the fourth-stage supercharging vortex disk structure; after being pressurized by the fourth-stage pressurizing vortex disc structure 11, the seawater is ejected out through the central flow passage 21 of the fourth-stage pressurizing vortex disc structure 11, enters the rear-stage flow distribution passage 33 of the valve plate 3, and then enters the first-stage reverse osmosis membrane group 300 through the high-pressure seawater outlet B on the static vortex disc 2 of the fourth-stage pressurizing vortex disc structure 11. It should be appreciated that seawater can serve to carry away frictional heat and lubricate.
In the multistage pressurizing scroll structure 11, as shown in fig. 5 and 6, the orbiting scroll 4 is mounted on the main shaft 9 through the eccentric bushing 6, and the scroll teeth of the orbiting scroll 4 oscillate in the scroll teeth of the fixed scroll 2 by the action of the eccentric bushing 6, so that the enclosed volume 24 formed between the scroll teeth of the orbiting scroll 4 and the scroll teeth of the fixed scroll 2 changes periodically from large to small, thereby realizing the suction, compression and discharge of fluid. In the present embodiment, the main shaft 9 is transmitted to the orbiting scroll 4 through a key (not shown) and the eccentric sleeve 6.
As shown in fig. 5 and 6, in the present embodiment, the cross ring 5 forms an anti-rotation structure of the orbiting scroll 4, and both ends thereof are respectively engaged with a cross ring chute (not shown) of the orbiting scroll 4 and a cross ring chute (not shown) of the cross ring seat 7, thereby performing a limiting function. It should be noted that, a filtering device (not shown) may be added at the original seawater inlet a on the fixed scroll 2 of the first stage booster scroll structure 11 to prevent the larger particles from excessively wearing the scroll structure; the pressure upper limit of the operation of each stage of the pressurizing vortex disc structure can be better controlled by arranging a pressure relief opening (not shown) on each static vortex disc 2 and adjusting the pressure relief opening (for example, a pressure adjusting valve is arranged on the pressure relief opening to realize pressure adjustment), so that the pressurizing vortex disc structure is safe and reliable.
In addition, although as shown in fig. 6, the four-stage supercharging vortex plate structure 11 is seen from left to right: a movable scroll 4 and a fixed scroll 2; a port plate 3; a fixed scroll 2 and an orbiting scroll 4; a cross ring seat 7; a movable scroll 4 and a fixed scroll 2; a port plate 3; a fixed scroll 2 and an movable scroll 4. But the four-stage booster scroll structure 11 may also employ: a fixed scroll 2 and an orbiting scroll 4; a cross ring seat 7; a movable scroll 4 and a fixed scroll 2; a port plate 3; a fixed scroll 2 and an orbiting scroll 4; a cross ring seat 7; a movable scroll 4 and a fixed scroll 2. The number of stages of the pressurizing scroll structure 11 may be changed at will, for example, the pressurizing scroll structure may be two stages, three stages, five stages, six stages, etc., and the number of stages may be either singular or even, so long as the number of stages is determined according to the seawater pressure required by the reverse osmosis membrane group of the first stage.
As shown in fig. 7, and referring to fig. 5, in the present embodiment, the multi-stage pressure compensating scroll structure 13 is a four-stage scroll structure (but each has an inlet and an outlet) installed in series, and unlike the multi-stage pressure increasing scroll structure 11 shown in fig. 6, two flow distribution channels 30 are provided on the flow distribution plate 3 configured in the four-stage pressure compensating scroll structure 13, that is, one flow distribution channel 30 is provided for each stage of pressure compensating scroll structure of the adjacent two-stage pressure compensating scroll structure. In each stage of the pressure compensating scroll structure 13, a central runner 21 and a peripheral runner 23 are arranged on the fixed scroll 2, wherein the central runner 21 is communicated with the center of a closed volume 24 of the stage of the pressure compensating scroll structure 13, and the peripheral runner 23 is communicated with the periphery of the closed volume 24. The fixed scroll 2 is further provided with a reverse osmosis return port (indicated by C, E, G, I in fig. 7) communicating with the peripheral flow passage 23, and a post-pressurization output port (indicated by D, F, H, J in fig. 7) communicating with the central passage 21 via the distribution flow passage 30.
As shown in fig. 8, and referring to fig. 5, in the present embodiment, the multi-stage energy recovery scroll structure 15 is a six-stage scroll structure, unlike the multi-stage pressurizing scroll structure 11 shown in fig. 6, in the energy recovery scroll structure, the scroll teeth of the movable scroll 4 can oscillate in the scroll teeth of the fixed scroll 2 under the pressure of high-pressure seawater, so that the enclosed volume 24 formed between the scroll teeth of the movable scroll 4 and the scroll teeth of the fixed scroll 2 is periodically changed from small to large, and fluid discharge, release and suction are realized, thereby realizing that the movable scroll 4 drives the main shaft 9 through the action of the eccentric sleeve 6, that is, the kinetic energy of the movable scroll 4 is converted into the kinetic energy of the main shaft 9, which can reduce the energy output of the motor driving the main shaft 9, and save energy.
As shown in fig. 8, in the six-stage energy recovery scroll structure 15, a center flow passage 21 and a peripheral flow passage 23 are provided on each fixed scroll 2, the center flow passage 21 communicates with the center of a closed volume 24 corresponding to the fixed scroll 2, and the peripheral flow passage 23 communicates with the periphery of the closed volume 24. In the former stage of the energy recovery scroll structure 15 of each adjacent two-stage energy recovery scroll structure, i.e. in the first, third and fifth stage energy recovery scroll structures, the fixed scroll 2 is provided with a high pressure fluid inlet, wherein the high pressure fluid inlet on the fixed scroll 2 of the first stage energy recovery scroll structure 15 located at the left side of fig. 8 constitutes a reverse osmosis butt joint K, and the high pressure fluid inlet in the third and fifth stage energy recovery scroll structures is denoted by numeral 20. The peripheral runner 23 on the fixed vortex disk 2 of the energy recovery vortex disk structure 15 of the last stage, namely the sixth stage, is communicated with the recovered seawater discharge port L.
In this multi-stage energy recovery scroll structure 15, a port plate 3 is provided between the first-stage and second-stage energy recovery scroll structures, between the third-stage and fourth-stage energy recovery scroll structures, and between the fifth-stage and sixth-stage energy recovery scroll structures. Taking the valve plate 3 between the first-stage energy recovery vortex disc structure and the second-stage energy recovery vortex disc structure as an example, a front grading flow passage 31 and a rear grading flow passage 33 are arranged on the valve plate, the front grading flow passage 31 is respectively communicated with a high-pressure fluid inlet in the first-stage energy recovery vortex disc structure, namely a reverse osmosis opposite interface K and a central flow passage 21, and the rear grading flow passage 33 is respectively communicated with a peripheral flow passage 23 in the first-stage energy recovery vortex disc structure and the central flow passage 21 of the second-stage energy recovery vortex disc structure.
In the multi-stage energy recovery scroll structure 15, the cross ring seat 7 is disposed between the first adjacent two-stage energy recovery scroll structure and the second adjacent two-stage energy recovery scroll structure, and between the second adjacent two-stage energy recovery scroll structure and the third adjacent two-stage energy recovery scroll structure, that is, the cross ring seat 7 is disposed between the second-stage and third-stage energy recovery scroll and between the fourth-stage and fifth-stage energy recovery scroll, and the delivery flow path 70 is provided thereon. Taking the cross ring seat 7 between the second stage and the third stage energy recovery scroll as an example, the positional connection relationship of the delivery flow path 70 will be described: the delivery flow passage 70 thereon communicates at one end with the peripheral flow passage 23 of the second stage energy recovery scroll structure and at the other end with the high pressure fluid inlet 20 of the third stage energy recovery scroll structure.
As shown in fig. 5, in the present embodiment, the first-stage reverse osmosis membrane group 300 includes two reverse osmosis membrane groups, and each of the second-stage reverse osmosis membrane group 300 to the fifth-stage reverse osmosis membrane group 300 includes one reverse osmosis membrane group. It should be understood that each stage of reverse osmosis membrane module may comprise only one reverse osmosis membrane module. In this embodiment, the reverse osmosis membrane group is a reverse osmosis membrane, and they are independently disposed in the single membrane housing 301 (see fig. 2), so that the repair and maintenance are facilitated.
It should be noted that, the seawater high-pressure pump 200 of the present invention is a positive displacement pump, the operation pressure depends on the load, but the requirement of the meshing gap between the scrolls and the requirement of the strength of the material and the tightness of the mechanism tend to limit the upper limit of the pressure of the pump, and the increase of the upper limit of the pressure of the pump by increasing the number of stages of the scroll structure is an effective means provided by the present invention, and the device for increasing or decreasing the number of stages of the scroll structure by the "through-shaft" manner like the present invention should fall within the scope of the present invention.
In addition, the invention has the following specific effects and advantages:
1) The reverse osmosis membrane pump integrated sea water desalination unit breaks through the inherent thought of the prior art, has the advantages of large and novel design thought, more compact structure, smaller occupied area, space saving and lower capital investment cost;
2) The existing high-pressure pump is removed to form a membrane pump integrated body, and the membrane pump integrated body is uniformly driven by a motor to optimize the utilization of electric energy;
3) Moreover, the membrane pump is integrated, the high-pressure pump is removed, and an invisible fault point is removed, so that the system is relatively more stable and reliable in operation;
4) The membrane pump is integrated and shares one motor, so that the circuit wiring, arrangement and automatic control are facilitated;
5) The membrane pump is integrated, the equipment is simple, the overhaul and the maintenance are convenient, and the management and control difficulty and the maintenance cost can be greatly reduced.
While the technical content and features of the present invention have been disclosed above, it will be understood that various changes and modifications to the above-described structure, including combinations of technical features individually disclosed or claimed herein, and other combinations of these features as apparent to those skilled in the art may be made under the inventive concept of the present invention. Such variations and/or combinations fall within the technical field to which the invention relates and fall within the scope of the claims of the invention.
Claims (8)
1. A reverse osmosis membrane pump integrated sea water desalination unit, which is characterized by comprising:
a motor;
The multi-stage reverse osmosis membrane sets are arranged to be capable of reverse osmosis of high-pressure seawater and outputting fresh water and reverse osmosis seawater;
The seawater high-pressure pump comprises a pump shell, a main shaft driven by a motor, a multi-stage pressurizing vortex disc structure, a multi-stage pressure supplementing vortex disc structure and a multi-stage energy recovery vortex disc structure, wherein the multi-stage pressurizing vortex disc structure, the multi-stage pressurizing vortex disc structure and the multi-stage energy recovery vortex disc structure are sequentially installed in series through the main shaft, the multi-stage pressurizing vortex disc structure is arranged to receive original seawater from the outside and pressurize the original seawater step by step under the driving of the main shaft, so that high-pressure seawater is provided for a first-stage reverse osmosis membrane group in the multi-stage reverse osmosis membrane group, the multi-stage pressure supplementing vortex disc structure is arranged to supplement the reverse osmosis seawater from the corresponding one-stage reverse osmosis membrane group under the driving of the main shaft, the multi-stage energy recovery vortex disc structure is arranged to receive high-pressure strong brine from a last-stage reverse osmosis membrane group of the multi-stage reverse osmosis membrane group, and the multi-stage energy recovery vortex disc structure is arranged to convert the pressure energy of the high-pressure strong brine into kinetic energy of the main shaft and produce low-pressure strong brine;
A fresh water collection line communicating with each stage of reverse osmosis membrane group to collect fresh water;
The multistage supercharging vortex plate structure is provided with an original seawater inlet and a high-pressure seawater outlet; each stage of pressure supplementing vortex disc structure is provided with a reverse osmosis backflow port and a pressure supplementing rear output port; the multistage energy recovery vortex plate structure is provided with a reverse osmosis opposite interface for receiving the high-pressure strong brine and a recovery seawater discharge port for outputting the low-pressure strong brine; each stage of reverse osmosis membrane group of the multistage reverse osmosis membrane group is arranged to be capable of reverse osmosis of high-pressure seawater to obtain fresh water, and is provided with a membrane group inlet and a membrane group outlet, wherein the membrane group inlet of the first stage of reverse osmosis membrane group in the multistage reverse osmosis membrane group is communicated with the high-pressure seawater outlet of the multistage supercharging vortex disc structure, the membrane group outlet of the last stage of reverse osmosis membrane group is communicated with a reverse osmosis butt joint port of the multistage energy recovery vortex disc structure, the other membrane group outlets of the multistage reverse osmosis membrane group are respectively communicated with a reverse osmosis backflow port corresponding to the multistage supercharging vortex disc structure, and the other membrane group inlets are respectively communicated with a post-pressure supplementing output port corresponding to the multistage supercharging vortex disc structure;
each reverse osmosis membrane group comprises a protection pipe and a reverse osmosis membrane positioned in the protection pipe.
2. The integrated reverse osmosis membrane pump sea water desalination unit according to claim 1, wherein the membrane group outlet of the first stage reverse osmosis membrane group is communicated with the reverse osmosis backflow port of the first stage pressure compensating scroll structure of the multistage pressure compensating scroll structure, the post-pressure compensating outlet of the first stage pressure compensating scroll structure is communicated with the membrane group inlet of the second stage reverse osmosis membrane group of the multistage reverse osmosis membrane group, the membrane group outlet of the second stage reverse osmosis membrane group is communicated with the reverse osmosis backflow port of the second stage pressure compensating scroll structure of the multistage pressure compensating scroll structure, the post-pressure compensating outlet of the second stage pressure compensating scroll structure is communicated with the membrane group inlet of the third stage reverse osmosis membrane group of the multistage reverse osmosis membrane group, and so on until the post-pressure compensating outlet of the last stage pressure compensating scroll structure of the multistage pressure compensating scroll structure is communicated with the membrane group inlet of the last stage reverse osmosis membrane group.
3. The reverse osmosis membrane pump integrated sea water desalination unit according to claim 1 or 2, wherein each of the multi-stage pressurizing scroll structure, the multi-stage pressure compensating scroll structure and the multi-stage energy recovering scroll structure comprises a fixed scroll and a movable scroll engaged with the fixed scroll to form a closed volume, adjacent two-stage scroll structures are arranged in such a manner that the fixed scroll and the fixed scroll are mounted back to back or the movable scroll and the movable scroll are mounted back to back, and each movable scroll is mounted on the main shaft through an eccentric shaft sleeve and is provided with an anti-rotation structure.
4. The reverse osmosis membrane pump integrated sea water desalination unit according to claim 3, wherein a valve plate is arranged between the fixed vortex plate and the fixed vortex plate which are arranged back to back, a cross ring seat is arranged between the movable vortex plate and the movable vortex plate which are arranged back to back, the anti-rotation structure is a cross ring, and two sides of the cross ring are respectively connected with the cross ring seat and the movable vortex plate in a sliding manner.
5. The reverse osmosis membrane pump-integrated sea water desalination unit according to claim 4, wherein in the multi-stage pressurizing scroll structure, a central flow passage communicated with the center of the corresponding closed volume and a peripheral flow passage communicated with the periphery of the closed volume are arranged on each of the fixed scroll, a low-pressure fluid inlet communicated with the peripheral flow passage of the fixed scroll is arranged on the fixed scroll of a former stage pressurizing scroll structure of an adjacent two-stage pressurizing scroll structure, a high-pressure fluid outlet is arranged on the fixed scroll of a latter stage pressurizing scroll structure, the low-pressure fluid inlet in a first stage pressurizing scroll structure of the multi-stage pressurizing scroll structure forms the original sea water inlet, and the high-pressure fluid outlet in a last stage pressurizing scroll structure forms the high-pressure sea water outlet; the front grading flow passage is respectively communicated with a central flow passage in the front stage supercharging vortex disk structure and a peripheral flow passage in the rear stage supercharging vortex disk structure, and the rear grading flow passage is respectively communicated with the central flow passage in the rear stage supercharging vortex disk structure and a high-pressure fluid outlet on the static vortex disk of the rear stage supercharging vortex disk structure; and a conveying runner is arranged on the cross ring seat, one end of the conveying runner is communicated with a high-pressure fluid outlet of the next-stage supercharging vortex disc structure, and the other end of the conveying runner is communicated with a low-pressure fluid inlet in a previous-stage supercharging vortex disc structure of the next adjacent two-stage supercharging vortex disc structure.
6. The integrated reverse osmosis membrane pump sea water desalination unit according to claim 4, wherein in the multistage pressure compensating vortex disc structure, a flow distribution channel is arranged on the flow distribution disc for each stage of pressure compensating vortex disc structure of two adjacent stages of pressure compensating vortex disc structures, in each stage of pressure compensating vortex disc structure, a central flow channel communicated with the center of the corresponding closed volume and a peripheral flow channel communicated with the periphery of the closed volume are arranged on the fixed vortex disc, and the reverse osmosis return port communicated with the peripheral flow channel and the post-pressure compensating output port communicated with the central channel through the corresponding flow distribution channel are also arranged on the fixed vortex disc.
7. The reverse osmosis membrane pump integrated sea water desalination unit according to claim 4, wherein in the multi-stage energy recovery vortex disc structure, a central flow passage communicated with the center of the corresponding closed volume and a peripheral flow passage communicated with the periphery of the closed volume are arranged on each fixed vortex disc of a previous-stage energy recovery vortex disc structure of each adjacent two-stage energy recovery vortex disc structure, a high-pressure fluid inlet is arranged on the fixed vortex disc of a first-stage vortex disc structure of the multi-stage energy recovery vortex disc structure, the high-pressure fluid inlet on the fixed vortex disc of a first-stage vortex disc structure of the multi-stage energy recovery vortex disc structure forms the reverse osmosis opposite interface, and a peripheral flow passage on the fixed vortex disc of a last-stage energy recovery vortex disc structure is communicated with the recovered sea water discharge port; the front grading flow passage is respectively communicated with a high-pressure fluid inlet and a central flow passage in a front-stage energy recovery vortex disc structure of the adjacent two-stage energy recovery vortex disc structure, and the rear grading flow passage is respectively communicated with a peripheral flow passage in the front-stage energy recovery vortex disc structure and a central flow passage in a rear-stage energy recovery vortex disc structure of the adjacent two-stage energy recovery vortex disc structure; and a conveying runner is arranged on the cross ring seat, one end of the conveying runner is communicated with a peripheral runner of the next-stage energy vortex disc structure, and the other end of the conveying runner is communicated with a high-pressure fluid inlet of a previous-stage energy recovery vortex disc structure of the next adjacent two-stage energy recovery vortex disc structure.
8. The reverse osmosis membrane pump integrated desalination unit of claim 1 further comprising a cartridge filter having an original seawater inlet configured to filter original seawater and to input seawater to the seawater high pressure pump through the original seawater inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811225768.3A CN109179580B (en) | 2018-10-21 | 2018-10-21 | Reverse osmosis membrane pump integrated sea water desalination unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811225768.3A CN109179580B (en) | 2018-10-21 | 2018-10-21 | Reverse osmosis membrane pump integrated sea water desalination unit |
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| JPS61132791A (en) * | 1984-12-01 | 1986-06-20 | Hiroyuki Satone | Pump |
| IT1272452B (en) * | 1993-05-25 | 1997-06-23 | Lowara Spa | Apparatus consisting of axially integrated turbine and multistage pump, especially suitable for recovery of energy in reverse osmosis treatment processes for industrial and similar waste waters |
| JP5383163B2 (en) * | 2008-11-27 | 2014-01-08 | 三菱重工業株式会社 | Multistage seawater desalination apparatus and operation control method for multistage seawater desalination apparatus |
| CN102786174B (en) * | 2012-03-29 | 2013-12-18 | 波鹰(厦门)科技有限公司 | Seawater desalination device and method thereof |
| US9617172B1 (en) * | 2016-06-10 | 2017-04-11 | Henry A Baski | Desalination system and method for producing freshwater by reverse osmosis of seawater |
| CN207513843U (en) * | 2017-12-08 | 2018-06-19 | 江苏长江水泵有限公司 | Self-balanced multiple-stage centrifugal pump is opened in stable level |
| CN108238664B (en) * | 2017-12-30 | 2021-02-02 | 北京工业大学 | Integrated low-pulsation seawater desalination energy recovery supercharging device |
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