CN107237758B - Hydraulic supercharging and residual pressure recovery device - Google Patents
Hydraulic supercharging and residual pressure recovery device Download PDFInfo
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- CN107237758B CN107237758B CN201710589418.4A CN201710589418A CN107237758B CN 107237758 B CN107237758 B CN 107237758B CN 201710589418 A CN201710589418 A CN 201710589418A CN 107237758 B CN107237758 B CN 107237758B
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- recoverer
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- 238000011084 recovery Methods 0.000 title claims abstract description 119
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 156
- 238000010168 coupling process Methods 0.000 claims abstract description 28
- 238000005859 coupling reaction Methods 0.000 claims abstract description 28
- 230000008878 coupling Effects 0.000 claims abstract description 27
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 27
- 239000012528 membrane Substances 0.000 claims abstract description 21
- 230000001105 regulatory effect Effects 0.000 claims description 24
- 238000007789 sealing Methods 0.000 claims description 15
- 230000003068 static effect Effects 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 abstract description 4
- 230000033001 locomotion Effects 0.000 description 7
- 239000012141 concentrate Substances 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/04—Units comprising pumps and their driving means the pump being fluid driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/04—Units comprising pumps and their driving means the pump being fluid driven
- F04D13/046—Units comprising pumps and their driving means the pump being fluid driven the fluid driving means being a hydraulic motor of the positive displacement type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
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- 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
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a hydraulic boosting and residual pressure recovery device, which relates to the technical field of fluid machinery and comprises a high-pressure sleeve, and a residual pressure recovery assembly and a boosting assembly which are arranged in the high-pressure sleeve. The high-pressure sleeve comprises a raw water inlet end and a high-pressure water outlet end, wherein the raw water inlet end and the high-pressure water outlet end are respectively arranged at two opposite ends of the high-pressure sleeve and are suitable for being connected with a water inlet of the reverse osmosis membrane cylinder. The residual pressure recovery assembly is arranged in the high-pressure sleeve and is close to the raw water inlet end and comprises a residual pressure recovery inlet and a residual pressure recovery outlet. The supercharging assembly comprises a supercharging centrifugal pump connected with the residual pressure recoverer through a coupling. The hydraulic boosting and residual pressure recovery device is connected with the residual pressure recovery assembly and the boosting centrifugal pump through the coupling, and the boosting centrifugal pump is driven by the residual pressure recovery assembly, so that the hydraulic boosting and residual pressure recovery device is simple in structure, saves the consumption of a motor, recovers energy of high-pressure concentrated water and saves energy.
Description
Technical Field
The invention relates to the technical field of fluid machinery, in particular to a hydraulic pressurizing and residual pressure recycling device.
Background
The sea water system and the industrial wastewater zero discharge water treatment system need a pump to provide a high-pressure environment for reverse osmosis membrane filtration to obtain cleaner water. Wherein the system high pressure is provided by a high pressure plunger pump, and in the high pressure zone, the centrifugal pump pressurizes the liquid again, maintaining the high performance operation of the reverse osmosis system. The reverse osmosis system can generate a certain amount of high-pressure concentrated water, and can be used for recovering residual pressure. At present, a scheme of sealing a multistage centrifugal booster pump by a high-pressure machine is mainly adopted, and the pump is powered by an external motor. The existing residual pressure recovery technology (isave) uses high-pressure concentrated water to boost raw water, and then the raw water is pressurized by a vane pump to reach the system pressure.
At present, a scheme of sealing a multistage centrifugal booster pump by a high-pressure machine is mainly adopted, and the pump is powered by an external motor. The high-pressure seal selected in the mode needs to bear quite high pressure difference, and has higher technical difficulty, high comprehensive cost and poor reliability.
The existing residual pressure recovery device utilizes the residual pressure of the concentrated water to pressurize the raw water. The concentrated water flow and the pressurized raw water flow must be kept equal, the pressurized raw water is pressurized to the system pressure by the vane pump, the preset water treatment operation is carried out, and the pressurized water flow and the concentrated water flow are also kept equal. Therefore, the scheme cannot be applied to the working condition that the circulating pressurized water quantity and the concentrated water quantity of the high-pressure area are unequal in the reverse osmosis process.
Disclosure of Invention
The invention aims to provide a hydraulic supercharging and residual pressure recovery device which integrates supercharging and residual pressure recovery, so as to save energy, reduce the use of a motor and improve the residual pressure recovery capability.
The hydraulic pressurizing and residual pressure recovering device is realized by the following steps:
a hydraulic boost and residual pressure recovery device comprising: the device comprises a high-pressure sleeve, a residual pressure recovery assembly and a pressurizing assembly, wherein the residual pressure recovery assembly and the pressurizing assembly are arranged in the high-pressure sleeve; wherein the method comprises the steps of
The high-pressure sleeve comprises a raw water inlet end and a high-pressure water outlet end, wherein the raw water inlet end and the high-pressure water outlet end are respectively arranged at two opposite ends of the high-pressure sleeve and are suitable for being connected with a water inlet of the reverse osmosis membrane cylinder;
the residual pressure recovery assembly is arranged in the high-pressure sleeve and is close to the raw water inlet end, and comprises a residual pressure recovery inlet, a residual pressure recovery outlet and a residual pressure recoverer which is respectively connected with the residual pressure recovery inlet and the residual pressure recovery outlet; the residual pressure recovery inlet is connected with the water outlet of the reverse osmosis membrane cylinder so as to be suitable for recovering the concentrated water; and
the pressurizing assembly is arranged in the high-pressure sleeve and positioned below the residual pressure recoverer, is connected with the high-pressure water outlet end and is suitable for pressurizing raw water; comprises a booster centrifugal pump connected with a residual pressure recoverer through a coupling.
Further, a gap suitable for raw water to flow into the booster centrifugal pump is arranged between the residual pressure recoverer and the inner wall of the high-pressure sleeve.
Further, the residual pressure recovery inlet is provided with a flow regulating control valve; or (b)
The residual pressure recovery outlet is provided with a flow regulating control valve.
Further, the residual pressure recovery assembly further comprises a control unit which is electrically connected with the flow regulation control valve and used for controlling the opening degree of the flow regulation control valve.
Further optionally, a plunger motor for recovering the residual pressure is arranged in the residual pressure recoverer, and the plunger motor comprises a connecting rotating shaft connected with the coupling.
Further optionally, a pressure turbine for recovering the residual pressure is arranged in the residual pressure recoverer, and the pressure turbine comprises a connecting rotating shaft connected with the coupling.
Further, a pressure sensor and a flowmeter which are electrically connected with the control unit are arranged at the flow regulating control valve;
the control unit controls the opening degree of the flow regulating control valve to control the flow of the concentrated water in the residual pressure recoverer.
Further, the pressurizing centrifugal pump comprises a main shaft connected with the coupling, a pressurizing centrifugal impeller set arranged on the main shaft and used for pressurizing raw water, and a pressurizing shell arranged outside the pressurizing centrifugal impeller set; wherein the method comprises the steps of
One end of the main shaft passes through the centrifugal impeller group and is fixedly connected with the coupler, and the other end of the main shaft is rotationally connected with the supercharging shell close to the high-pressure water outlet end;
the main shaft is connected with the connecting rotating shaft through the coupler, and the connecting rotating shaft rotates to drive the main shaft to rotate, so that the rotating speed of the supercharging centrifugal impeller set is controlled by the input power of the residual pressure recoverer.
Furthermore, the residual pressure recoverer and the dynamic seal of the booster centrifugal pump adopt a gap sealing structure;
the residual pressure recovery inlet and the residual pressure recovery outlet are sealed in a high-pressure static sealing mode; and
the raw water inlet end and the high-pressure water outlet end are sealed in a high-pressure static sealing mode.
A hydraulic boost and residual pressure recovery device comprising: the high-pressure sleeve, the residual pressure recovery component and the pressurizing component which are arranged in the high-pressure sleeve, and a bypass loop; wherein the method comprises the steps of
The high-pressure sleeve comprises a raw water inlet end and a high-pressure water outlet end, wherein the raw water inlet end and the high-pressure water outlet end are respectively arranged at two opposite ends of the high-pressure sleeve and are suitable for being connected with a water inlet of the reverse osmosis membrane cylinder;
the residual pressure recovery assembly is arranged in the high-pressure sleeve and is close to the raw water inlet end, and comprises a residual pressure recovery inlet, a residual pressure recovery outlet and a residual pressure recoverer which is respectively connected with the residual pressure recovery inlet and the residual pressure recovery outlet; the residual pressure recovery inlet is connected with the water outlet of the reverse osmosis membrane cylinder so as to be suitable for recovering the concentrated water;
the pressurizing assembly is arranged in the high-pressure sleeve and positioned below the residual pressure recoverer, is connected with the high-pressure water outlet end and is suitable for pressurizing raw water, and comprises a pressurizing centrifugal pump connected with the residual pressure recoverer through a coupling; and
the bypass loop is arranged at one side of the high-pressure water outlet end and is suitable for cleaning the outer wall of the booster centrifugal pump and the inner cavity wall of the high-pressure sleeve.
The beneficial effects of the invention are as follows: according to the hydraulic boosting and residual pressure recovery device obtained through the design, the residual pressure recovery assembly and the boosting centrifugal pump are connected through the coupler, and the boosting centrifugal pump is driven by the residual pressure recovery assembly, so that the hydraulic boosting and residual pressure recovery device is simple in structure, saves the consumption of a motor, boosts a system by utilizing residual pressure, and plays a role in saving energy and improving efficiency.
Further, the residual pressure recoverer can adopt a plunger motor or a pressure turbine, the pressure of the concentrated water is measured through a pressure sensor arranged at a flow regulating control valve to control the flow of the concentrated water in the residual pressure recoverer, and the input power of the residual pressure recoverer can be controlled through the flow of the concentrated water in the residual pressure recoverer, so that the supercharging capacity of a supercharging centrifugal pump is changed. Under different pressure demands, different residual pressure recoverers can be selected to meet different demands.
Furthermore, the residual pressure recoverer and the pressurizing assembly are packaged in the high-pressure sleeve, so that the high-pressure sealing of the residual pressure recovery inlet, the residual pressure recovery outlet, the raw water inlet end and the high-pressure water outlet end can be ensured to be in a static sealing mode; the rotating mechanism is mainly in a high-pressure environment, and the dynamic seal replaces a high-pressure seal by adopting a gap machine seal, so that the use of the high-pressure seal can be reduced, and the cost is reduced.
Still further, through the bypass circuit that sets up, can be used to wash booster centrifugal pump outer wall and high pressure sleeve inner chamber wall, guarantee the cleanness of system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view showing the internal structure of a hydraulic boosting and residual pressure recovering device according to embodiment 1 or embodiment 2 of the present invention;
FIG. 2 is a schematic structural view of the hydraulic boosting and residual pressure recovery device according to embodiment 1 or embodiment 2 of the present invention;
FIG. 3 is a schematic view showing the internal structure of the hydraulic boosting and residual pressure recovering device according to embodiment 3 of the present invention;
fig. 4 is a schematic structural diagram of a hydraulic boosting and residual pressure recovering device according to embodiment 3 of the present invention.
Icon: 100-high pressure sleeve; 101-a raw water inlet end; 102-a high-pressure water outlet end; 200-residual pressure recovery components; 201-a residual pressure recovery inlet; 202-a residual pressure recovery outlet; 203-a residual pressure recoverer; 204-connecting the rotating shaft; 300-booster centrifugal pump; 301-a main shaft; 302-a set of pressurized centrifugal impeller; 303-a pressurized housing; 400-coupling; 500-bypass loop.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "orientation" or "positional relationship" are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present invention, unless expressly stated or limited otherwise, a first feature may include first and second features directly contacting each other, either above or below a second feature, or through additional features contacting each other, rather than directly contacting each other. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being below, beneath, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is less level than the second feature.
Example 1:
the embodiment provides a hydraulic pressurizing and residual pressure recycling device, which is suitable for water treatment systems such as sea and light systems and industrial wastewater zero emission, and comprises a high-pressure sleeve 100, a residual pressure recycling assembly 200 and a pressurizing assembly, wherein the residual pressure recycling assembly 200 and the pressurizing assembly are arranged in the high-pressure sleeve 100, as shown in fig. 1 and 2.
The high-pressure sleeve 100 includes a raw water inlet port 101 and a high-pressure water outlet port 102, which are respectively provided at opposite ends of the high-pressure sleeve 100, and are adapted to be connected to the water inlet of the reverse osmosis membrane cartridge.
The residual pressure recovery assembly 200 is disposed in the high pressure sleeve 100 and near the raw water inlet end 101, and includes a residual pressure recovery inlet 201 and a residual pressure recovery outlet 202, and a residual pressure recoverer 203 respectively connected to the residual pressure recovery inlet 201 and the residual pressure recovery outlet 202. The residual pressure recovery inlet 201 is connected with the reverse osmosis membrane cylinder water outlet to be suitable for recovering the concentrated water.
The pressurizing assembly is arranged in the high-pressure sleeve 100 and positioned below the residual pressure recoverer 203, is connected with the high-pressure water outlet end 102 and is suitable for pressurizing raw water, and comprises a pressurizing centrifugal pump 300 connected with the residual pressure recoverer 203 through a coupling 400. The coupling 400 is used for connecting the booster centrifugal pump 300 and the residual pressure recovery assembly 200, so that one output end can be shared, the consumption of a motor is saved, the energy is saved, and the cost of the device is reduced.
The high-pressure sleeve 100 is provided with four pipeline interfaces, namely a raw water inlet end 101 and a high-pressure water outlet end 102, a residual pressure recovery inlet 201 and a residual pressure recovery outlet 202, wherein the high-pressure water outlet end 102 and the residual pressure recovery inlet 201 are connected with a reverse osmosis membrane cylinder of a water treatment system end to end, the pressure of raw water flowing through the device is improved, and the flow rate of the device is improved; the residual pressure recovery inlet 201 is connected with the water outlet of the reverse osmosis membrane cylinder, the residual pressure recovery outlet 202 is connected with a concentrated water discharge system, the concentrated water flows through the device, and the residual pressure is recovered by the device.
A gap suitable for raw water to flow to the booster centrifugal pump 300 is provided between the excess pressure recoverer 203 and the inner wall of the high-pressure sleeve 100. The residual pressure recoverer 203 is independently and hermetically arranged in the high-pressure sleeve 100, raw water cannot enter the residual pressure recoverer 203 after flowing through the residual pressure recoverer 203, and flows into the pressurizing centrifugal pump 300 through a set gap to pressurize the raw water, so that the design ensures that the raw water and the concentrated water of the system cannot contact each other.
The residual pressure recovery inlet 201 or the residual pressure recovery outlet 202 is provided with a flow rate adjustment control valve. The flow regulating control valve is used for regulating the flow of the concentrated water flow led out from the water outlet of the reverse osmosis membrane cylinder.
The residual pressure recovery assembly 200 further comprises a control unit electrically connected with the flow regulating control valve and suitable for controlling the opening degree of the flow regulating control valve. The power of the residual pressure recoverer 203 of the device is controlled by a flow regulation control valve of a flow regulation control valve designed at the residual pressure recovery inlet 201 or the residual pressure recovery outlet 202, and the total input power and the rotation speed of the centrifugal pump can be controlled by increasing or reducing the opening of the flow regulation control valve, so that the aim of controlling the pressurizing capacity is fulfilled.
In the case of a high required pressure, a plunger motor is selected in the residual pressure recovery device 203, and the plunger motor includes a connection shaft 204 connected to the coupling 400. The plunger motor is used for recovering the residual pressure.
The working principle of the plunger motor is as follows: the working medium acts on the end surface of the piston or plunger to make the piston or plunger reciprocate linearly, and then the reciprocating motion of the piston or plunger is converted into circular motion connected with the rotating shaft 204 through a motion conversion mechanism (a swash plate, a cam, a crank and the like).
A pressure sensor and a flowmeter which are electrically connected with the control unit are arranged at the flow regulating control valve; that is, the pressure transmitted by the pressure sensor is given to the control unit, and the opening degree of the flow rate adjustment control valve is controlled by the control unit to control the flow rate of the concentrate in the residual pressure recoverer 203. The residual pressure can be recovered in a larger pressure range and is used for the online pressurization of the reverse osmosis system.
The booster centrifugal pump 300 comprises a main shaft 301 connected with a coupling 400, a booster centrifugal impeller set 302 arranged on the main shaft 301 and used for boosting raw water, and a booster casing 303 arranged outside the booster centrifugal impeller set 302. One end of the main shaft 301 passes through the centrifugal impeller set and is fixedly connected with the coupling 400, and the other end of the main shaft is rotatably connected with the pressurizing shell 303 close to the high-pressure water outlet end 102. Namely, the spindle 301 is connected with the connecting rotating shaft 204 through the coupling 400, and the spindle 301 is driven to rotate through the rotation of the connecting rotating shaft 204, so that the rotation speed of the supercharging centrifugal impeller set 302 is controlled by the input power of the residual pressure recoverer 203, and the supercharging capacity is further controlled.
The working principle of the flow regulating control valve is as follows: when the pressure sensor detects that the pressure of the concentrated water is low, the control unit controls the flow regulating control valve to increase the opening degree, namely the input power of the residual pressure recoverer 203 is increased, the movement rate of the plunger motor is increased, and the rotating speed of the booster centrifugal pump 300 is increased, so that the boosting capacity of the booster centrifugal pump 300 is enhanced; when the pressure sensor detects that the pressure of the concentrated water is too high, the control unit controls the flow regulating control valve to reduce the opening, namely, the input power of the residual pressure recoverer 203 is reduced, the movement rate of the plunger motor is reduced, and the rotating speed of the booster centrifugal pump 300 is reduced, so that the boosting capacity of the booster centrifugal pump 300 is reduced.
The rotary dynamic seals of the residual pressure recoverer 203 and the booster centrifugal pump 300 adopt clearance seal structures, namely, the rotary dynamic seals are connected between the rotating shaft 204 and the plunger motor, and the rotary dynamic seals between the main shaft 301 and the booster centrifugal impeller set 302, so that the rotary dynamic seal has a simple seal structure. The residual pressure recovery inlet 201 and the residual pressure recovery outlet 202 are sealed in a high-pressure static sealing mode; and the raw water inlet end 101 and the high-pressure water outlet end 102 are sealed in a high-pressure static sealing mode. In a high-pressure environment, the static seal mode is sealed firmly.
The booster centrifugal booster pump of the device works at a pressure of >40bar, and expensive high-pressure seals are required to be used for shaft seals in the prior art. The combination of the centrifugal booster pump and the residual pressure recovery assembly 200, and the use of a gap seal instead of a high pressure seal, can reduce the cost of the device and improve reliability.
Example 2:
the present embodiment also provides a hydraulic boosting and residual pressure recovering device, as shown in fig. 1 and 2, including a high-pressure sleeve 100, a residual pressure recovering assembly 200 disposed in the high-pressure sleeve 100, and a boosting assembly.
The high-pressure sleeve 100 includes a raw water inlet port 101 and a high-pressure water outlet port 102, which are respectively provided at opposite ends of the high-pressure sleeve 100, and are adapted to be connected to the water inlet of the reverse osmosis membrane cartridge.
The residual pressure recovery assembly 200 is arranged in the high-pressure sleeve 100 and is close to the raw water inlet end 101, and comprises a residual pressure recovery inlet 201, a residual pressure recovery outlet 202 and a residual pressure recoverer 203 respectively connected with the residual pressure recovery inlet 201 and the residual pressure recovery outlet 202; the residual pressure recovery inlet 201 is connected with the reverse osmosis membrane cylinder water outlet to be suitable for recovering the concentrated water.
The pressurizing assembly is arranged in the high-pressure sleeve 100 and positioned below the residual pressure recoverer 203, is connected with the high-pressure water outlet end 102 and is suitable for pressurizing raw water, and comprises a pressurizing centrifugal pump 300 connected with the residual pressure recoverer 203 through a coupling 400. The coupling 400 is used for connecting the booster centrifugal pump 300 and the residual pressure recovery assembly 200, so that one output end can be shared, the consumption of a motor is saved, the energy is saved, and the cost of the device is reduced.
The high-pressure sleeve 100 is provided with four pipeline interfaces, namely a raw water inlet end 101 and a high-pressure water outlet end 102, a residual pressure recovery inlet 201 and a residual pressure recovery outlet 202, wherein the high-pressure water outlet end 102 and the residual pressure recovery inlet 201 are connected with a reverse osmosis membrane cylinder of a water treatment system end to end, the pressure of raw water flowing through the device is improved, and the flow rate of the device is improved; the residual pressure recovery inlet 201 is connected with the water outlet of the reverse osmosis membrane cylinder, the residual pressure recovery outlet 202 is connected with a concentrated water discharge system, the concentrated water flows through the device, and the residual pressure is recovered by the device.
A gap suitable for raw water to flow to the booster centrifugal pump 300 is provided between the excess pressure recoverer 203 and the inner wall of the high-pressure sleeve 100. The residual pressure recoverer 203 is independently and hermetically arranged in the high-pressure sleeve 100, raw water cannot enter the residual pressure recoverer 203 after flowing through the residual pressure recoverer 203, and flows into the pressurizing centrifugal pump 300 through a set gap to pressurize the raw water, so that the design ensures that the raw water and the concentrated water of the system cannot contact each other.
The residual pressure recovery inlet 201 or the residual pressure recovery outlet 202 is provided with a flow rate adjustment control valve. The flow regulating control valve is used for regulating the flow of the concentrated water flow led out from the water outlet of the reverse osmosis membrane cylinder.
The residual pressure recovery assembly 200 further comprises a control unit electrically connected with the flow regulating control valve and suitable for controlling the opening degree of the flow regulating control valve. The power of the residual pressure recoverer 203 of the device is controlled by a flow regulation control valve of a flow regulation control valve designed at the residual pressure recovery inlet 201 or the residual pressure recovery outlet 202, and the total input power and the rotation speed of the centrifugal pump can be controlled by increasing or reducing the opening of the flow regulation control valve, so that the aim of controlling the pressurizing capacity is fulfilled.
In the case of a small required pressure, the residual pressure recoverer 203 is a pressure turbine, which includes a connection shaft 204 connected to the coupling 400. The pressure turbine is used for recovering the residual pressure.
The working principle of the pressure turbine is as follows: the most important component of the turbine is a rotating member, or rotor, or impeller, mounted on the turbine shaft with blades arranged uniformly along the shaft, the energy imparted to the fluid being converted into a function during flow through the nozzle, the fluid striking the impeller as it flows through the impeller, driving the impeller to rotate, thereby driving the connecting shaft 204 to rotate and outputting mechanical work.
A pressure sensor and a flowmeter which are electrically connected with the control unit are arranged at the flow regulating control valve; that is, the pressure transmitted by the pressure sensor is given to the control unit, and the opening degree of the flow rate adjustment control valve is controlled by the control unit to control the flow rate of the concentrate in the residual pressure recoverer 203. The residual pressure can be recovered in a larger pressure range and is used for the online pressurization of the reverse osmosis system.
The booster centrifugal pump 300 comprises a main shaft 301 connected with a coupling 400, a booster centrifugal impeller set 302 arranged on the main shaft 301 and used for boosting raw water, and a booster casing 303 arranged outside the booster centrifugal impeller set 302. One end of the main shaft 301 passes through the centrifugal impeller set and is fixedly connected with the coupling 400, and the other end of the main shaft is rotatably connected with the pressurizing shell 303 close to the high-pressure water outlet end 102. Namely, the spindle 301 is connected with the connecting rotating shaft 204 through the coupling 400, and the spindle 301 is driven to rotate through the rotation of the connecting rotating shaft 204, so that the rotation speed of the supercharging centrifugal impeller set 302 is controlled by the input power of the residual pressure recoverer 203, and the supercharging capacity is further controlled.
The working principle of the flow regulating control valve is as follows: when the pressure sensor detects that the pressure of the concentrated water is low, the control unit controls the flow regulating control valve to increase the opening degree, namely the input power of the residual pressure recoverer 203 is increased, the movement rate of the pressure turbine is accelerated, and the rotating speed of the booster centrifugal pump 300 is increased, so that the boosting capacity of the booster centrifugal pump 300 is enhanced; when the pressure sensor detects that the pressure of the concentrated water is too high, the control unit controls the flow regulating control valve to reduce the opening, namely, the input power of the residual pressure recoverer 203 is reduced, the movement rate of the pressure turbine is reduced, the rotating speed of the booster centrifugal pump 300 is reduced, and the boosting capacity of the booster centrifugal pump 300 is reduced.
The dynamic seals of the residual pressure recoverer 203 and the booster centrifugal pump 300 are of gap sealing structures, namely, the gap seals are adopted between the connecting rotating shaft 204 and the pressure turbine, and between the main shaft 301 and the booster centrifugal impeller set 302, so that the sealing structure is simple. The residual pressure recovery inlet 201 and the residual pressure recovery outlet 202 are sealed in a high-pressure static sealing mode. In a high-pressure environment, the static seal mode is sealed firmly.
The booster centrifugal booster pump of the device works at a pressure of >40bar, and expensive high-pressure seals are required to be used for shaft seals in the prior art. The combination of the centrifugal booster pump and the residual pressure recovery assembly 200, and the use of a gap machine seal instead of a high pressure machine seal, can reduce the cost of the device and improve the reliability.
Example 3:
as shown in fig. 3 and 4, a hydraulic supercharging and residual pressure recovery apparatus of this embodiment is substantially the same as the structures of embodiment 1 and embodiment 2, except that a bypass circuit 500 for cleaning the outer wall of the supercharging centrifugal pump 300 and the high-pressure sleeve 100 is further provided on the side of the high-pressure water outlet port 102.
The hydraulic boosting and residual pressure recovering device of the present embodiment includes a high-pressure sleeve 100, a residual pressure recovering assembly 200 and a boosting assembly provided in the high-pressure sleeve 100, and a bypass circuit 500.
The high-pressure sleeve 100 includes a raw water inlet port 101 and a high-pressure water outlet port 102, which are respectively provided at opposite ends of the high-pressure sleeve 100, and are adapted to be connected to the water inlet of the reverse osmosis membrane cartridge.
The residual pressure recovery assembly 200 is arranged in the high-pressure sleeve 100 and is close to the raw water inlet end 101, and comprises a residual pressure recovery inlet 201, a residual pressure recovery outlet 202 and a residual pressure recoverer 203 respectively connected with the residual pressure recovery inlet 201 and the residual pressure recovery outlet 202; the residual pressure recovery inlet 201 is connected with the reverse osmosis membrane cylinder water outlet to be suitable for recovering the concentrated water.
The pressurizing assembly is arranged in the high-pressure sleeve 100 and positioned below the residual pressure recoverer 203, is connected with the high-pressure water outlet end 102 and is suitable for pressurizing raw water, and comprises a pressurizing centrifugal pump 300 connected with the residual pressure recoverer 203 through a coupling 400. The coupling 400 is used for connecting the booster centrifugal pump 300 and the residual pressure recovery assembly 200, so that one output end can be shared, the consumption of a motor is saved, the energy is saved, and the cost of the device is reduced.
The bypass circuit 500 is arranged at one side of the high-pressure water outlet end 102 and is suitable for cleaning the outer wall of the booster centrifugal pump 300 and the inner cavity wall of the high-pressure sleeve 100 so as to ensure the cleaning of the system. Preferably, the bypass circuit 500 remains normally open.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The hydraulic supercharging and residual pressure recycling device is characterized by comprising a high-pressure sleeve, and a residual pressure recycling assembly and a supercharging assembly which are arranged in the high-pressure sleeve; wherein the method comprises the steps of
The high-pressure sleeve comprises a raw water inlet end and a high-pressure water outlet end, wherein the raw water inlet end and the high-pressure water outlet end are respectively arranged at two opposite ends of the high-pressure sleeve and are suitable for being connected with a water inlet of the reverse osmosis membrane cylinder;
the residual pressure recovery assembly is arranged in the high-pressure sleeve and is close to the raw water inlet end, and comprises a residual pressure recovery inlet, a residual pressure recovery outlet and a residual pressure recoverer which is respectively connected with the residual pressure recovery inlet and the residual pressure recovery outlet; the residual pressure recovery inlet is connected with the water outlet of the reverse osmosis membrane cylinder so as to be suitable for recovering the concentrated water; and
the pressurizing assembly is arranged in the high-pressure sleeve and positioned below the residual pressure recoverer, is connected with the high-pressure water outlet end and is suitable for pressurizing raw water, and comprises a pressurizing centrifugal pump connected with the residual pressure recoverer through a coupling;
the raw water inlet end is positioned above the residual pressure recoverer; the residual pressure recoverer is internally provided with a plunger motor for recovering residual pressure, and the plunger motor comprises a connecting rotating shaft connected with the coupler; or a pressure turbine for recovering residual pressure is arranged in the residual pressure recoverer, and the pressure turbine comprises a connecting rotating shaft connected with the coupling;
a gap suitable for raw water to flow into the booster centrifugal pump is arranged between the residual pressure recoverer and the inner wall of the high-pressure sleeve;
the supercharging centrifugal pump comprises a main shaft connected with the coupling, a supercharging centrifugal impeller set arranged on the main shaft and used for supercharging raw water, and a supercharging shell arranged outside the supercharging centrifugal impeller set; one end of the main shaft penetrates through the centrifugal impeller group and is fixedly connected with the coupler, and the other end of the main shaft is rotatably connected with the supercharging shell close to the high-pressure water outlet end; the main shaft is connected with the connecting rotating shaft through the coupler, and the main shaft is driven to rotate through the rotation of the connecting rotating shaft, so that the rotating speed of the supercharging centrifugal impeller set is controlled by the input power of the residual pressure recoverer.
2. The hydraulic boost and residual pressure recovery device according to claim 1, wherein said residual pressure recovery inlet is provided with a flow regulating control valve; or (b)
And the residual pressure recovery outlet is provided with a flow regulating control valve.
3. The hydraulic boost and residual pressure device of claim 2, wherein the residual pressure recovery assembly further comprises a control unit electrically connected to the flow control valve for controlling the opening of the flow control valve.
4. The hydraulic supercharging and residual pressure recovery device according to claim 3, wherein a pressure sensor and a flowmeter electrically connected with the control unit are arranged at the flow rate adjusting control valve;
the control unit controls the opening degree of the flow regulating control valve to control the flow of the concentrated water in the residual pressure recoverer.
5. The hydraulic boosting and residual pressure recovery device according to claim 1, wherein the residual pressure recoverer and the boosting centrifugal pump dynamic seal both adopt a clearance sealing structure;
the residual pressure recovery inlet and the residual pressure recovery outlet are sealed in a high-pressure static sealing mode; and
the raw water inlet end and the high-pressure water outlet end are sealed in a high-pressure static sealing mode.
6. The hydraulic supercharging and residual pressure recovery device is characterized by comprising a high-pressure sleeve, a residual pressure recovery assembly and a supercharging assembly which are arranged in the high-pressure sleeve, and a bypass loop; wherein the method comprises the steps of
The high-pressure sleeve comprises a raw water inlet end and a high-pressure water outlet end, wherein the raw water inlet end and the high-pressure water outlet end are respectively arranged at two opposite ends of the high-pressure sleeve and are suitable for being connected with a water inlet of the reverse osmosis membrane cylinder;
the residual pressure recovery assembly is arranged in the high-pressure sleeve and is close to the raw water inlet end, and comprises a residual pressure recovery inlet, a residual pressure recovery outlet and a residual pressure recoverer which is respectively connected with the residual pressure recovery inlet and the residual pressure recovery outlet; the residual pressure recovery inlet is connected with the water outlet of the reverse osmosis membrane cylinder so as to be suitable for recovering the concentrated water;
the pressurizing assembly is arranged in the high-pressure sleeve and positioned below the residual pressure recoverer, is connected with the high-pressure water outlet end and is suitable for pressurizing raw water, and comprises a pressurizing centrifugal pump connected with the residual pressure recoverer through a coupling; and
the bypass loop is arranged at one side of the high-pressure water outlet end and is suitable for cleaning the outer wall of the booster centrifugal pump and the inner cavity wall of the high-pressure sleeve;
the raw water inlet end is positioned above the residual pressure recoverer; the residual pressure recoverer is internally provided with a plunger motor for recovering residual pressure, and the plunger motor comprises a connecting rotating shaft connected with the coupler; or a pressure turbine for recovering residual pressure is arranged in the residual pressure recoverer, and the pressure turbine comprises a connecting rotating shaft connected with the coupling; a gap suitable for raw water to flow into the booster centrifugal pump is arranged between the residual pressure recoverer and the inner wall of the high-pressure sleeve;
the supercharging centrifugal pump comprises a main shaft connected with the coupling, a supercharging centrifugal impeller set arranged on the main shaft and used for supercharging raw water, and a supercharging shell arranged outside the supercharging centrifugal impeller set; one end of the main shaft penetrates through the centrifugal impeller group and is fixedly connected with the coupler, and the other end of the main shaft is rotatably connected with the supercharging shell close to the high-pressure water outlet end; the main shaft is connected with the connecting rotating shaft through the coupler, and the main shaft is driven to rotate through the rotation of the connecting rotating shaft, so that the rotating speed of the supercharging centrifugal impeller set is controlled by the input power of the residual pressure recoverer.
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| CN201710589418.4A CN107237758B (en) | 2017-07-19 | 2017-07-19 | Hydraulic supercharging and residual pressure recovery device |
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| CN201710589418.4A CN107237758B (en) | 2017-07-19 | 2017-07-19 | Hydraulic supercharging and residual pressure recovery device |
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| CN107237758B true CN107237758B (en) | 2024-02-27 |
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| EP3009181A1 (en) * | 2014-09-29 | 2016-04-20 | Sulzer Management AG | Reverse osmosis system |
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