CN110862124A - Pressure energy recovery device and water treatment membrane system - Google Patents
Pressure energy recovery device and water treatment membrane system Download PDFInfo
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- CN110862124A CN110862124A CN201911069417.2A CN201911069417A CN110862124A CN 110862124 A CN110862124 A CN 110862124A CN 201911069417 A CN201911069417 A CN 201911069417A CN 110862124 A CN110862124 A CN 110862124A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 239000012528 membrane Substances 0.000 title claims abstract description 111
- 238000011084 recovery Methods 0.000 title claims abstract description 43
- 230000001105 regulatory effect Effects 0.000 claims abstract description 29
- 238000010248 power generation Methods 0.000 claims abstract description 22
- 239000013505 freshwater Substances 0.000 claims description 14
- 230000001360 synchronised effect Effects 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 239000012141 concentrate Substances 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000001223 reverse osmosis Methods 0.000 description 9
- 239000012267 brine Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 7
- 238000000926 separation method Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 1
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000019837 monoammonium phosphate Nutrition 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 description 1
- 229940074439 potassium sodium tartrate Drugs 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 235000011006 sodium potassium tartrate Nutrition 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
- F03B15/02—Controlling by varying liquid flow
- F03B15/04—Controlling by varying liquid flow of turbines
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2220/00—Application
- F05B2220/70—Application in combination with
- F05B2220/706—Application in combination with an electrical generator
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The application relates to a pressure energy recovery unit and water treatment membrane system, pressure energy recovery unit includes: the system comprises a power generation device, a turbine device, a rectifying device and a first control device. The turbine equipment comprises a water inlet, a water outlet and a rotating shaft, the rotating shaft is connected with the power generation equipment, and the water outlet is provided with a regulating valve. The first control device can control the opening amplitude of the regulating valve according to the parameters of the direct current generated by the rectifying device, so that the finally obtained direct current meets the use conditions. The application provides pressure energy recovery device simple structure.
Description
Technical Field
The application relates to the field of water treatment, in particular to a pressure energy recovery device and a water treatment membrane system.
Background
Reverse osmosis, also known as reverse osmosis, is a membrane separation technique that uses pressure differential as a driving force to separate a solvent from a solution. Nanofiltration is a pressure-driven membrane separation process between reverse osmosis and ultrafiltration, is also called low-pressure reverse osmosis, is a new field of membrane separation technology, has separation performance between reverse osmosis and ultrafiltration, and allows some inorganic salts and some solvents to permeate through the membrane, thereby achieving the separation effect. In the application process of reverse osmosis technology, a treatment mode of reducing energy consumption, saving energy and reducing water production cost is concerned by people. Taking high brine as an example, because the high brine has high salinity and large osmotic pressure, the high brine treated by the reverse osmosis technology needs to provide higher working pressure, and when the strong brine is discharged, the strong brine still has certain pressure, and if the strong brine is directly discharged, the loss of pressure energy is caused.
An energy recovery device is additionally arranged in the reverse osmosis system, so that pressure energy can be recovered. In the conventional art, the pressure energy that earlier has with the strong brine area through the hydraulic turbine converts mechanical energy into, and the reuse generator converts mechanical energy into the electric energy and retrieves.
However, before the mechanical energy enters the generator, the mechanical energy needs to be transmitted to the speed regulating device, and then enters the generator after being regulated by the speed regulating device. Such an energy recovery device is complicated in structure.
Disclosure of Invention
In view of the above, it is necessary to provide a pressure energy recovery device and a water treatment membrane system.
A pressure energy recovery device comprising:
a power generation device;
a turbine installation comprising: the water outlet is provided with an adjusting valve which is used for controlling the water flow speed of the water outlet;
a rectifying device electrically connected to the power generating device;
and the first control equipment is in communication connection with the rectifying equipment and the regulating valve and is used for monitoring the value of the parameter of the direct current generated by the rectifying equipment and controlling the opening amplitude of the regulating valve according to the value of the parameter of the direct current.
In one embodiment, the method further comprises the following steps:
the first control equipment is used for monitoring the value of the parameter of the alternating current generated by the inverter equipment.
In one embodiment, the regulator valve comprises:
a valve body;
and the driving device is in communication connection with the first control device and is in driving connection with the valve body, and the driving device is used for driving the valve body according to the signal sent by the first control device.
In one embodiment, the turbine plant is a turbine.
In one embodiment, the power generation device is a permanent magnet synchronous motor.
In one embodiment, the method further comprises the following steps:
and the electric energy feedback line is electrically connected with the inverter equipment and is used for transmitting the alternating current generated by the inverter equipment to a power grid.
The pressure energy recovery device that this application embodiment provided includes: the system comprises a power generation device, a turbine device, a rectifying device and a first control device. The turbine equipment comprises a water inlet, a water outlet and a rotating shaft, wherein the water outlet is provided with a regulating valve. The rotating shaft is connected with the power generation equipment. The first control device controls the opening amplitude of the regulating valve according to the value of the parameter of the direct current generated by the rectifying device, and can control the water flow speed in the turbine device, so that the rotating speed of the turbine device is changed. The rotating speed of the turbine equipment changes, and the rotating speed of the power generation equipment also changes along with the change of the rotating speed of the turbine equipment, so that the values of relevant parameters of the direct current processed by the rectifying equipment meet preset conditions, and the direct current processed by the rectifying equipment is stable and reliable. The pressure energy recovery device can recover pressure energy, and waste of energy is avoided. In this embodiment, the pressure energy recovery device does not need to be provided with a rotating speed device between the turbine equipment and the rectifying equipment, the structure is simple, and meanwhile, the pressure energy recovery device is in a modular design, can be integrally replaced as a component, and is convenient to maintain and install.
A water treatment membrane system comprising:
a pressure energy recovery device as described above;
a membrane device, comprising: membrane group intake pump, membrane group high-pressure pump, membrane group concentrate pipe and fresh water drain pipe, membrane group high-pressure pump connect in membrane group intake pump with between the membrane group, membrane group concentrate pipe with fresh water drain pipe all set up in the membrane group, membrane group concentrate pipe with the water inlet intercommunication.
In one embodiment, the method further comprises the following steps:
and the pressure sensor is arranged on the membrane group.
In one embodiment, the membrane device further comprises:
and the second control equipment is in communication connection with the pressure sensor, the membrane group water inlet pump and the membrane group high-pressure pump.
In one embodiment, the second control device is in communication with the first control device, and the first control device is configured to control the regulating valve according to pressure information detected by the second control device.
The water treatment membrane system that this application embodiment provided includes: a pressure energy recovery device and a membrane device. The membrane device comprises: the membrane group water inlet pump, the membrane group high-pressure pump, the membrane group concentrated water pipe and the fresh water drain pipe. The concentrated water discharged from the concentrated water pipe of the membrane group has certain pressure energy, and the pressure energy recovery device can recover the pressure energy, so that the waste of energy is reduced to a great extent. Meanwhile, in the embodiment, the pressure energy recovery device recovers the pressure energy in the concentrated water and then discharges the recovered pressure energy, so that the danger can be reduced.
Drawings
Fig. 1 is a schematic structural diagram of a pressure energy recovery device according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a pressure energy recovery device according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a water treatment membrane system according to an embodiment of the present application.
Description of reference numerals:
10. a pressure energy recovery device;
20. a membrane device;
21. a membrane group water inlet pump;
22. a membrane group high-pressure pump;
23. film group;
24. a membrane group concentrated water pipe;
25. a fresh water drain pipe;
26. a pressure sensor;
27. a second control device;
30. a water treatment membrane system;
100. a power generation device;
200. a turbine facility;
210. a water inlet;
220. a water outlet;
230. a rotating shaft;
240. adjusting a valve;
250. a turbine equipment housing;
260. a blade;
241. a drive device;
242. a valve body;
300. a rectifying device;
400. a first control device;
500. an inverter device;
600. and (6) feeding the electric energy back to the feeder.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the pressure energy recovery apparatus and process of the present application are further described in detail by the following embodiments in combination with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1 and fig. 2, an embodiment of the present application provides a pressure energy recovery apparatus 10, including: a power plant 100, a turbine plant 200, a rectifying plant 300 and a first control plant 400.
The turbine facility 200 includes: a water inlet 210, a water outlet 220, and a rotation shaft 230. The rotating shaft 230 is connected to the power generating equipment 100, and the water outlet 220 is provided with an adjusting valve 240, wherein the adjusting valve 240 is used for controlling the water flow rate of the water outlet 220. The turbine facility 200 further includes: the turbine equipment comprises a turbine equipment shell 250 and blades 260, wherein the water inlet 210 is arranged above the turbine equipment shell 250, and the water outlet 220 is arranged below the turbine equipment shell 250. The rotating shaft 230 and the blades 260 are both disposed inside the turbine equipment casing. The number of the blades is plural, the plurality of blades 260 are all connected to the rotating shaft 230, and the plurality of blades 260 surround the rotating shaft 230. The turbine facility 200 is used to convert pressure energy into mechanical energy. Pressurized water enters the turbine housing 250 from the inlet 210, and the water impacts the blades 260 to rotate the rotating shaft 230, so that the pressurized energy can be converted into mechanical energy. The power generation plant 100 is connected to a rotating shaft 230 in the turbine plant 200, the rotating shaft 230 transmits mechanical energy to the power generation plant 100, and the power generation plant 100 converts the mechanical energy into electrical energy. The present embodiment does not set any limit to the kind and structure of the turbine equipment 200 and the power generation equipment 100 as long as the respective functions of the turbine equipment 200 and the power generation equipment 100 can be achieved.
The rectifying device 300 is electrically connected to the power generating device 100. The electric power generated by the power generation apparatus 100 is alternating current. The rectifying device 300 can convert the alternating current generated by the power generating device 100 into direct current. Since the flow rate of water entering the turbine facility 200 may be unstable, the ac power generated by the power generating facility 100 may be unstable, and the rectifying facility 300 can rectify the unstable ac power, so that the stable dc power is finally obtained.
The first control device 400 is communicatively connected to the rectifying device 300 and the regulating valve 240. The first control device 400 is able to obtain values of parameters related to the direct current generated by the rectifying device 300, such as: frequency and amplitude, etc. Meanwhile, the first control device 400 can compare the monitored value of the parameter related to the direct current generated by the rectifying device 300 with a preset parameter threshold value of the direct current. According to the comparison result, the first control device 400 can correspondingly control the opening amplitude of the regulating valve 240, so that the water flow speed of the turbine device 200 can be controlled, and the rotating speed of the turbine device 200 is changed. The rotating speed of the turbine equipment 200 is changed, and the rotating speed of the power generation equipment 100 is changed accordingly, so that the relevant parameters of the direct current processed by the rectifying equipment 300 can be changed, and the parameter value of the direct current is equal to the preset parameter threshold. For example: the rectifying device 300 generates a dc current with a frequency less than a predetermined frequency threshold, indicating a lower water flow rate into the turbine apparatus 200. The first control device 400 controls the regulating valve 240 to increase the opening amplitude, the water flow rate into the turbine device 200 increases, and the rotational speed of the turbine device 200 and the power generating device 100 also increases. The rotation speed of the power generating apparatus 100 is increased, so that the frequency value of the direct current processed by the rectifying apparatus 300 can be increased to a preset frequency threshold.
The first control device 400 may be, but is not limited to, various industrial computers, programmable controllers, embedded computers, and single-chip microcomputers.
In this embodiment, the pressure energy recovery apparatus 10 includes: a power plant 100, a turbine plant 200, a rectifying plant 300 and a first control plant 400. The turbine facility 200 includes: a water inlet 210, a water outlet 220, and a rotation shaft 230. The water outlet 220 is provided with a regulating valve 240. The first control device 400 can control the opening amplitude of the regulating valve 240 according to the value of the parameter of the direct current processed by the rectifying device 300, and can control the water flow speed in the turbine device 200, so that the rotating speed of the turbine device 200 is changed. The rotating speed of the turbine equipment 200 changes, and the rotating speed of the power generation equipment 100 also changes accordingly, so that the values of the relevant parameters of the direct current processed by the rectifying equipment 300 meet the preset conditions, and the direct current processed by the rectifying equipment 300 is stable and reliable. The pressure energy recovery device 10 can recover pressure energy, and waste of energy is avoided. In this embodiment, the pressure energy recovery device 10 does not need to install a rotation speed device between the turbine equipment 200 and the rectifying equipment 300, and the structure is simple. Meanwhile, the pressure energy recovery device is in a modular design, can be integrally replaced as a component, and is convenient to maintain and install.
Referring to fig. 2, in an embodiment, the pressure energy recovery device 10 further includes:
an inverter device 500, the inverter device 500 being electrically connected with the rectifying device 300, and the inverter device 500 being communicatively connected with the first control device 400. The inverter device 500 is used to convert the direct current into alternating current. The first control apparatus 400 is used to monitor the value of a parameter of the alternating current generated by the inverter apparatus 500.
The inverter device 500 may convert the dc power processed by the rectifying device 300 into ac power. The first control apparatus 400 can acquire values of relevant parameters of the alternating current generated by the inverter apparatus 500, such as: frequency and amplitude, etc. The first control apparatus 400 may compare the monitored value of the parameter related to the alternating current generated by the inverter apparatus 500 with a preset parameter threshold. According to the comparison result, the first control device 400 can correspondingly control the opening amplitude of the regulating valve 240, so that the water flow speed of the turbine device 200 can be controlled, and the rotating speed of the turbine device 200 is changed. The rotating speed of the turbine equipment 200 is changed, and the rotating speed of the power generation equipment 100 is also changed, so that the values of the relevant parameters of the alternating current processed by the inverter equipment 500 can be changed, and the values of the parameters of the alternating current are equal to the preset parameter threshold. For example: the frequency of the ac power generated by the inverter device 500 is greater than the predetermined frequency threshold, indicating a greater water flow rate into the turbine device 200. The first control device 400 controls the regulating valve 240 to decrease the opening amplitude, the water flow rate into the turbine device 200 decreases, and the rotational speeds of the turbine device 200 and the power generating device 100 also decrease. The rotation speed of the power generation device 100 is reduced, so that the frequency value of the alternating current processed by the rectification device 300 and the inversion device 500 can be reduced to a preset frequency threshold value. The alternating current obtained by recycling meets the daily electricity utilization standard and can be used for other purposes, thereby avoiding the waste of energy.
With continued reference to fig. 2, in one embodiment, the regulating valve 240 includes: a valve body 242 and a drive device 241.
The driver device 241 is communicatively connected to the first control device 400. The actuating device 241 is in driving connection with the valve body 242. The driving device 241 is used for driving the valve body 242 according to the signal sent by the first control device 400.
The driving device 241 receives the signal sent by the first control device 400, drives the valve body 242 to move, and can change the opening amplitude of the regulating valve 240, so as to change the water flow speed entering the turbine device 200.
In one embodiment, the turbine facility 200 is a turbine.
In one embodiment, the power generation plant 100 is a permanent magnet synchronous machine.
The turbine has one major rotating element, the rotor or impeller. When water flow entering the turbine flows through the impeller, the impact blades push the impeller to rotate, so that the rotating shaft is driven to rotate, and conversion from pressure energy to mechanical energy is completed. Because the permanent magnet synchronous motor is coaxially connected with the turbine, the rotation of the rotating shaft can drive the permanent magnet synchronous motor to rotate, and the conversion from mechanical energy to electric energy is completed. The power factor of the permanent magnet synchronous motor is high and is irrelevant to the stage number of the permanent magnet synchronous motor. Meanwhile, the permanent magnet synchronous motor also has the advantages of high starting torque, short starting time, high overload capacity, convenience in control and the like.
With continued reference to fig. 2, in one embodiment, the pressure energy recovery device 10 further includes:
a power feedback line 600, the power feedback line 600 being electrically connected to the inverter device 500. The power feedback line 600 is used for transmitting the ac power generated by the inverter device 500 to the power grid. The alternating current processed by the inverter device 500 meets the daily electricity utilization standard. Therefore, the electric energy feedback line 600 is used for transmitting the alternating current to the power grid, so that the application range of the alternating current processed by the inverter device 500 is wider.
Referring to fig. 3, an embodiment of the present application provides a water treatment membrane system 30, including: any of the above embodiments provides the pressure energy recovery device 10 and the membrane device 20. The membrane device 20 comprises: a membrane group water inlet pump 21, a membrane group high-pressure pump 22, a membrane group 23, a membrane group concentrated water pipe 24 and a fresh water drain pipe 25.
The membrane group high-pressure pump 22 is connected between the membrane group water inlet pump 21 and the membrane group 23, the membrane group concentrated water pipe 24 and the fresh water drain pipe 25 are both arranged on the membrane group 23, and the membrane group concentrated water pipe 24 is communicated with the water inlet 210.
High-salt water enters the membrane module high-pressure pump 22 through the membrane module water inlet pump 21. The membrane module high-pressure pump 22 pressurizes the high-salt water entering the membrane module 23. After the pressurized high-salt water is processed by the membrane module 23, the fresh water is discharged from the fresh water discharge pipe 25, and the high-pressure concentrated water enters the pressure energy recovery device 10 from the membrane module concentrated water pipe 24 and the water inlet 210. The pressure energy recovery device 10 processes the high-pressure concentrated water, and the high-pressure concentrated water is decompressed to be changed into low-pressure concentrated water to be discharged from the water outlet 220. And converts the pressure energy into electric energy for recycling.
In this embodiment, the water treatment membrane system 30 includes: a pressure energy recovery device 10 and a membrane device 20. The membrane device 20 comprises: a membrane group water inlet pump 21, a membrane group high-pressure pump 22, a membrane group 23, a membrane group concentrated water pipe 24 and a fresh water drain pipe 25. The concentrated water discharged from the membrane group concentrated water pipe 24 has certain pressure energy, and the pressure energy recovery device 10 can recover the pressure energy, so that the waste of energy is reduced to a great extent. Meanwhile, in the present embodiment, the pressure energy recovery device 10 recovers the pressure energy in the concentrated water and then discharges the recovered pressure energy, so that the risk can be reduced.
With continued reference to fig. 3, in one embodiment, the water treatment membrane system 30 further comprises:
and the pressure sensor 26 is arranged on the membrane module 23.
The pressure sensor 26 is mainly manufactured by using the piezoelectric effect and may also be called an Athens sensor. The piezoelectric materials mainly used for the pressure sensor 26 include: quartz, potassium sodium tartrate, ammonium dihydrogen phosphate, and the like. The pressure sensor 26 is of a wide variety, for example: differential pressure sensors, absolute pressure sensors, gauge pressure sensors, dynamic pressure sensors of static pressure sensors, and the like. The pressure sensor 26 has a nominal pressure range, a maximum pressure range, a damage pressure, a temperature range, and a pressure hysteresis. In this embodiment, the type of the pressure sensor is not limited, and a user may select different types and different performances of the pressure sensor 26 according to actual requirements.
In one embodiment, the water treatment membrane system 30 further comprises:
a second control device 27, wherein the second control device 27 is in communication connection with the pressure sensor 26, the membrane group water inlet pump 21 and the membrane group high pressure pump 22.
In an embodiment, the second control device 27 is communicatively connected to the first control device 400, and the first control device 400 is configured to control the regulating valve 240 according to pressure information detected by the second control device 27.
The second control device 27 may be connected to the membrane module water inlet pump 21 and the membrane module high-pressure pump 22 by a wire or wirelessly. When the water treatment membrane system 30 is in operation, the second control device 27 can control the membrane module water inlet pump 21 and the membrane module high water pump 22 to start to work. The second control device 27 may be, but is not limited to, various industrial computers, programmable controllers, embedded computers, and single-chip microcomputers.
The pressure sensor 26 can sense the pressure of the membrane module 23. The second control device 27 and the pressure sensor 26 may be connected by a wire or wirelessly, and the second control device 27 can receive pressure information sensed by the pressure sensor 26. The first control device 400 can control the regulating valve 240 according to the pressure information in the second control device 27, so as to regulate the flow rate of the concentrated water entering the turbine device 200 from the water inlet 210, and thus can control the flow rate of the water in the membrane module 23, and the pressure of the membrane module 23 can be changed.
In this embodiment, the pressure of the membrane module 23 can be indirectly changed by adjusting the adjusting valve 240, so that the pressure of the membrane module 23 can be stabilized at a set value, and the water treatment membrane system 30 can stably and normally operate.
With continued reference to fig. 3, the operation of the water treatment membrane system 30 of the present application is explained in this embodiment.
When the water treatment membrane system 30 is normally operated, the second control device 27 controls the membrane module water inlet pump 21 and the membrane module high-pressure pump 22 to start working. The high-salt water enters the membrane group high-pressure pump 22 through the membrane group water inlet pump 21, and the membrane group high-pressure pump 22 provides pressure of about 5.8MPa-8.0MPa for the entering high-salt water. The high salt water with pressure enters the membrane module 23, and the concentrated water and the fresh water can be obtained by using the reverse osmosis technology, the fresh water is discharged from the fresh water discharge pipe 25, and the concentrated water enters the turbine device 200 through the membrane module concentrated water pipe 24 and the water inlet 210. The concentrated water has a pressure of about 5.6MPa to 5.8MPa, and the turbine device 200 converts the pressure into mechanical energy, so that the conversion efficiency can reach about 70 percent. Mechanical energy is converted into electric energy by the power generation equipment 100, and the conversion efficiency can reach 90%. The rectifying device 300 and the inverter device 500 process the power generated by the power generating device 100. The control of the regulating valve 240 by the first control device 400 enables the resulting electric energy to meet daily use standards. The efficiency of the rectifier device 300 and the inverter device 500 in processing electric energy can reach 95% or more. The efficiency of the integrated pressure energy recovery device 10 can reach 60%. And the first control apparatus 400 is capable of controlling the regulating valve 240 so that the membrane module 23 is at a stable value, based on the obtained pressure information of the membrane module 23. So that the water-treatment membrane system 30 can be normally and stably operated.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A pressure energy recovery device, comprising:
a power generation device (100);
turbine installation (200) comprising: the water supply system comprises a water inlet (210), a water outlet (220) and a rotating shaft (230), wherein the rotating shaft (230) is connected with the power generation equipment (100), the water outlet (220) is provided with a regulating valve (240), and the regulating valve (240) is used for controlling the water flow speed of the water outlet (220);
a rectifying device (300) electrically connected to the power generating device (100);
a first control device (400), communicatively connected to said rectifying device (300) and to said regulating valve (240), for monitoring the value of a parameter of the direct current generated by said rectifying device (300) and controlling the opening amplitude of said regulating valve (240) as a function of the value of the parameter of the direct current.
2. A pressure energy recovery device according to claim 1, further comprising:
-an inverter device (500) electrically connected to the rectifying device (300) and communicatively connected to the first control device (400) for converting direct current into alternating current, the first control device (400) being adapted to monitor values of parameters of the alternating current generated by the inverter device (500).
3. A pressure energy recovery device according to claim 1, wherein the regulating valve (240) comprises:
a valve body (242);
a drive device (241) communicatively connected to the first control device (400) and drivingly connected to the valve body (242), the drive device (241) being configured to drive the valve body (242) in accordance with a signal sent by the first control device (400).
4. Pressure energy recovery device according to claim 1, characterized in that the turbine equipment (200) is a turbine.
5. A pressure energy recovery device according to claim 1, characterized in that the power generating equipment (100) is a permanent magnet synchronous motor.
6. A pressure energy recovery device according to claim 2, further comprising:
and the electric energy feedback line (600) is electrically connected with the inverter device (500) and is used for transmitting the alternating current generated by the inverter device (500) to a power grid.
7. A water treatment membrane system, comprising:
the pressure energy recovery device (10) according to any of claims 1 to 6;
membrane device (20), comprising: membrane group intake pump (21), membrane group high-pressure pump (22), membrane group (23) membrane group concentrate pipe (24) and fresh water drain pipe (25), membrane group high-pressure pump (22) connect in membrane group intake pump (21) with between membrane group (23), membrane group concentrate pipe (24) with fresh water drain pipe (25) all set up in membrane group (23), membrane group concentrate pipe (24) with water inlet (210) intercommunication.
8. The water treatment membrane system as recited in claim 7, further comprising:
and a pressure sensor (26) provided to the membrane group (23).
9. A water treatment membrane system as claimed in claim 8, wherein the membrane device (20) further comprises:
a second control device (27) in communication connection with the pressure sensor (26), the membrane group water inlet pump (21) and the membrane group high pressure pump (22).
10. A water-treatment membrane system according to claim 9, characterized in that the second control device (27) is in communication connection with the first control device (400), the first control device (400) being adapted to control the regulating valve (240) in dependence of pressure information detected by the second control device (27).
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| CN201911069417.2A CN110862124A (en) | 2019-11-05 | 2019-11-05 | Pressure energy recovery device and water treatment membrane system |
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