CN115849610A - Energy-saving full-membrane-process filtering equipment - Google Patents
Energy-saving full-membrane-process filtering equipment Download PDFInfo
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- CN115849610A CN115849610A CN202211554194.0A CN202211554194A CN115849610A CN 115849610 A CN115849610 A CN 115849610A CN 202211554194 A CN202211554194 A CN 202211554194A CN 115849610 A CN115849610 A CN 115849610A
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Abstract
The invention relates to the technical field of water treatment, in particular to energy-saving full-membrane filtration equipment which comprises a water pump, an ejector, an ultrafiltration device, an ultrafiltration water tank, a reverse osmosis device, a vacuum decarburization tank and an EDI device, wherein the water inlet end of the ejector is connected with the water pump, the water outlet end of the ejector is communicated with the ultrafiltration device, the ultrafiltration device is communicated with the ultrafiltration water tank, the ultrafiltration water tank is communicated with the reverse osmosis device, the reverse osmosis device is communicated with the vacuum decarburization tank, the upper end of the vacuum decarburization tank is communicated with the ejector, the lower end of the vacuum decarburization tank is communicated with the EDI device, and the EDI device is communicated with a water outlet; the ejector is provided with a negative pressure connecting hole, and the upper end of the vacuum decarburization box is connected to the negative pressure connecting hole of the ejector; the invention removes a secondary reverse osmosis device which is commonly used for removing carbon dioxide in the prior art, reduces a plurality of complex devices, completely depends on necessary devices for removing the carbon dioxide, is not provided with redundant treatment devices, and effectively reduces the production cost.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to energy-saving full-membrane filtration equipment.
Background
The desalted water is finished water obtained by removing impurities such as suspended matters, colloid, inorganic cations, anions and the like in water by various water treatment processes. The current popular full-membrane system mainly comprises an ultrafiltration device, a primary reverse osmosis device, a secondary reverse osmosis device and an EDI device, wherein the ultrafiltration device is used for pretreatment and is used for removing substances such as suspended matters, colloids and the like; removing most of ions in water by a first-stage reverse osmosis device; and after the pH value of the secondary reverse osmosis device is adjusted, ions in water and carbon dioxide in the water are further removed so as to meet the water inlet requirement of the EDI device. For most water sources, the effluent of the first-stage reverse osmosis device can meet the water inlet requirement of the ED I device, but the only non-conformity is that the carbon dioxide content is high, so the second-stage reverse osmosis device in the system mainly plays a role in removing carbon dioxide, and the defects of long process route, large investment and high operating cost of the system are caused.
In order to solve the technical problems, chinese patent CN102531256A discloses a low-temperature seawater desalination process method and a device, and concretely comprises the steps of adding polyaluminium chloride and polyacrylamide into seawater, and then feeding the seawater into a multi-media filter; preheating seawater to 43 ℃, adjusting the pH value to 4.3, adding acid, and then entering a degassing tower to remove carbon dioxide and dissolved oxygen in the seawater; adding sodium hydroxide, sodium sulfite as a reducing agent and an organic silicon defoaming agent into seawater, and then feeding the seawater into a microfilter to remove small molecular organic substances; and finally, evaporating to obtain desalted water. In the above patent, the ejector is used to remove the carbon dioxide and other substances in the degassing tower, and then the substances are filtered by the microfilter, but the treatment of the removed carbon dioxide still requires a whole set of equipment, so that the production cost is high.
Therefore, the energy-saving full-membrane filtration equipment is provided, the process for producing the desalted water by the existing full-membrane system is optimized, the process route is reduced, and the production cost is reduced, which needs to be done by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide energy-saving full-membrane filtration equipment to solve the technical problems of long process route and high production cost of producing desalted water by adopting a full-membrane system in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: an energy-saving full-membrane-process filtering device comprises a water pump, an ejector, an ultrafiltration device, an ultrafiltration water tank, a reverse osmosis device, a vacuum decarburization box and an ED I device, wherein the water inlet end of the ejector is connected with the water pump, the water outlet end of the ejector is communicated with the ultrafiltration device, the ultrafiltration device is communicated with the ultrafiltration water tank, the ultrafiltration water tank is communicated with the reverse osmosis device, the reverse osmosis device is communicated with the vacuum decarburization box, the upper end of the vacuum decarburization box is communicated with the ejector, the lower end of the vacuum decarburization box is communicated with the ED I device, and the ED I device is communicated with a water outlet; the ejector is provided with a negative pressure connecting hole, and the upper end of the vacuum decarburization box is connected to the negative pressure connecting hole of the ejector.
Further, the pressure in the ejector is smaller than the pressure in the vacuum decarburization tank.
Further, the ejector is used for continuously sucking air in the vacuum decarburization box.
Furthermore, the pressure of the water pump is 0.3-0.6 Mpa.
Furthermore, the water inlet end of the water pump is connected with a water source, and the water pump is used for introducing raw water into the filtering equipment.
Further, the ultrafiltration water tank is communicated with the external atmosphere, and the atmospheric pressure inside the ultrafiltration water tank is normal pressure; the pressure in the ultrafiltration water tank is less than the pressure in the ultrafiltration device.
Furthermore, the ultrafiltration device consists of a raw liquid tank, a raw liquid pump, an ultrafiltration membrane, an ultrafiltration liquid tank and a connected pipe valve, wherein the filtration pore diameter of the ultrafiltration membrane is 0.001-0.1 μm.
Furthermore, the reverse osmosis device comprises equipment such as a multi-stage high-pressure pump, a reverse osmosis membrane element, a membrane shell, a bracket and the like, and the filtration pore size of the reverse osmosis membrane element is 0.0001-0.005 mu m.
Further, the ED I device comprises an anion/cation exchange membrane, ion exchange resin, a chemical cleaning device, instruments, valves, piping and other equipment.
The invention has the beneficial effects that:
the invention eliminates a secondary reverse osmosis device which is commonly used for removing carbon dioxide in the prior art, reduces a plurality of complex devices such as a dosing device, a detection device and the like, shortens the process route and further reduces the production cost; the invention adopts the vacuum decarbonization box to remove carbon dioxide from the produced water, realizes the continuous maintenance of the vacuum state of the vacuum decarbonization box by utilizing the power of the original water pump, leads the continuously vacuumized gaseous air and the liquid air to form a balance system, simultaneously leads the separated carbon dioxide to be mixed with the raw water in the ejector under certain pressure, leads the mixture and the raw water into the ultrafiltration device, leads the air pressure to be recovered to the normal pressure state after the raw water enters the ultrafiltration water tank, and releases the carbon dioxide mixed with the raw water and escapes to the external atmosphere to finish the removal of the carbon dioxide. Compared with the prior art, the invention completely depends on self necessary equipment for removing the carbon dioxide, and no redundant treatment equipment is arranged, thereby effectively reducing the production cost.
Drawings
FIG. 1 is a schematic structural view of an energy-saving full-membrane process filtration apparatus of the present invention.
The parts in the drawings are numbered as follows: 10. a water pump; 11. an ejector; 12. an ultrafiltration device; 13. an ultrafiltration water tank; 14. a reverse osmosis device; 15. a vacuum decarburization box; 16. an EDI device; 17. and connecting a negative pressure hole.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.
Referring to fig. 1, the present invention provides an energy-saving full-membrane filtration apparatus, which includes a water pump 10, an ejector 11, an ultrafiltration device 12, an ultrafiltration water tank 13, a reverse osmosis device 14, a vacuum decarbonization tank 15, and an ED I device 16. When the device is used, raw water is introduced into the filtering equipment by using the water pump 10 to prepare production water, and the production water is discharged from the water outlet end of the EDI device 16 after being treated to obtain desalted water.
The invention eliminates a secondary reverse osmosis device which is commonly used for removing carbon dioxide in the prior art, reduces a plurality of complex devices such as a dosing device, a detection device and the like, shortens the process route and further reduces the production cost; the invention adopts the vacuum decarburization box 15 to remove carbon dioxide from the production water treated by the reverse osmosis device 14, thereby ensuring that the production water meets the water inlet requirement of the ED I device 16.
In this embodiment, the ultrafiltration device 12 includes a raw liquid tank, a raw liquid pump, an ultrafiltration membrane, an ultrafiltrate tank, and a connected pipe valve, and the filtration pore size of the ultrafiltration membrane is 0.001 to 0.1 μm. The reverse osmosis device 14 comprises equipment such as a multi-stage high-pressure pump, a reverse osmosis membrane element, a membrane shell, a bracket and the like, and the filtering aperture of the reverse osmosis membrane element is 0.0001-0.005 mu m. The ED I device 16 includes anion/cation exchange membranes, ion exchange resins including, but not limited to, ultrapure water resins, chemical cleaning devices, instrumentation, valves, piping, and the like.
Furthermore, the water inlet end of the water pump 10 is connected with a water source, the water outlet end of the water pump 10 is connected with the ejector 11, the water pump 10 is used for introducing raw water into the filtering equipment, and meanwhile, the water pump 10 serves as a power source and provides power for the ejector 11. Preferably, the pressure of the water pump 10 is 0.3 to 0.6Mpa.
Furthermore, the water outlet end of the ejector 11 is communicated with an ultrafiltration device 12, the ultrafiltration device 12 is communicated with an ultrafiltration water tank 13, the ultrafiltration water tank 13 is communicated with a reverse osmosis device 14, the reverse osmosis device 14 is communicated with a vacuum decarburization box 15, the upper end of the vacuum decarburization box 15 is communicated with the ejector 11, the lower end of the vacuum decarburization box 15 is communicated with an ED I device 16, and the ED I device 16 is communicated with a water outlet.
When in use, raw water enters the ultrafiltration device 12 from the ejector 11, substances such as suspended matters, colloid and the like in the raw water are removed by using the ultrafiltration device 12, the filtered raw water is introduced into the ultrafiltration water tank 13, and the raw water is kept stand at normal pressure; raw water in the ultrafiltration water tank 13 is pumped into the reverse osmosis device 14, most ions in the raw water are removed by the reverse osmosis device 14 to obtain production water, the production water is introduced into the vacuum decarburization tank 15 to remove carbon dioxide, the production water is pumped into the ED I device 16 after the carbon dioxide is removed, and the production water is subjected to deep desalination treatment by the ED I device 16 to obtain desalted water.
Specifically, a negative pressure connecting hole 17 is formed in the ejector 11, and the upper end of the vacuum decarburization box 15 is connected to the negative pressure connecting hole 17 of the ejector 11; when the vacuum decarbonizing device is used, the water pump 10 pumps water into the ejector 11 and sprays the water from the water outlet end of the ejector 11 at a high speed, so that negative pressure is generated inside the ejector 11 and partial vacuum is formed, the vacuum area corresponds to the negative pressure connecting hole 17, therefore, the pressure inside the ejector 11 is smaller than that of the vacuum decarbonizing box 15, the vacuum is formed inside the vacuum decarbonizing box 15 connected with the ejector 11, and the ejector 11 can continuously suck air inside the vacuum decarbonizing box 15.
In this embodiment, the ejector 11 is a commercially available jet vacuum ejector, and is a vacuum obtaining device that uses fluid to transfer energy and mass, and uses a water flow with a certain pressure to be sprayed out through a nozzle with a certain side slope, so that the water flow is converged on a focus. Because the flow velocity of the sprayed water flow is extremely high, the pressure energy can be converted into velocity energy, so that the pressure in the air suction area is reduced, and further vacuum is generated.
The invention takes a water pump 10 as a power source, continuously pumps production water into a vacuum decarburization box 15, and removes carbon dioxide in the production water by combining the vacuum decarburization box 15 with an ejector 11 in the water pumping process; after the production water continuously enters the vacuum decarburization box 15, the vacuum decarburization box 15 in a vacuum state can automatically separate out carbon dioxide in the production water, the carbon dioxide is sucked away by using the negative pressure generated in the ejector 11, so that the quality of the production water meets the water inlet requirement of the EDI device 16, meanwhile, the negative pressure generated by the ejector 11 can further maintain the vacuum state in the vacuum decarburization box 15, and the use stability and continuity of the vacuum decarburization box 15 are ensured.
The invention utilizes the power of the original water pump 10 to realize the continuous maintenance of the vacuum state of the vacuum decarburization box 15, so that the continuously vacuumized gaseous air and the liquid air form a balance system, further the closed loop of the process is completed, the vacuum manufacturing equipment is not required to be independently arranged, and the production cost is greatly reduced; meanwhile, the basic working principle of the equipment is skillfully applied, the functions of the equipment are developed and applied to the maximum extent, the ejector 11 is used as a carbon dioxide absorption device, and the ultrafiltration water tank 13 is used as a carbon dioxide removal device, so that the number of the equipment is effectively reduced, the process route is optimized, and the production cost is reduced.
It will be appreciated that in the negative pressure situation, the carbon dioxide in the process water will automatically escape, and the reverse osmosis device 14 will lower the PH of the process water, so that the carbon dioxide in the process water can be removed more easily.
Further, the ultrafiltration water tank 13 is communicated with the outside atmosphere, and the atmospheric pressure inside the ultrafiltration water tank 13 is normal pressure. The pressure in the ultrafiltration water tank 13 is lower than the pressure in the ultrafiltration device 12.
In the invention, carbon dioxide in the vacuum decarburization tank 15 is sucked into the ejector 11, mixed with raw water under a certain pressure and then introduced into the ultrafiltration device 12 together with the raw water, the ultrafiltration device 12 cannot filter the carbon dioxide, when the raw water enters the ultrafiltration water tank 13, the air pressure is restored to the normal pressure state, the carbon dioxide mixed with the raw water is released and escapes to the external atmosphere, and the removal of the carbon dioxide is completed. The invention completely depends on self necessary equipment for removing the carbon dioxide, and no redundant treatment equipment is arranged, thereby further reducing the production cost; raw water in the ultrafiltration water tank 13 is pumped into the reverse osmosis device 14, production water is obtained through filtration, the production water is introduced into the vacuum decarburization tank 15, a new round of carbon dioxide removing process is performed, and the carbon dioxide removing effect is improved through circular removal.
The invention creatively takes the water pump 10 as a power source and the ejector 11 as a circulation hub, realizes the closed loop of the carbon dioxide removal process, can circularly remove the carbon dioxide in the water by depending on the circulation among the devices without the intervention of external devices, and greatly reduces the production cost.
The method comprises the following specific operation steps: the water pump 10 pumps raw water, the raw water passes through the ejector 11 at a high speed to form negative pressure, the ejector 11 absorbs carbon dioxide in the vacuum decarburization tank 15 by using the negative pressure, the ejector 11 mixes the carbon dioxide with the raw water and injects the mixture into the ultrafiltration device 12, substances such as suspended matters, colloid and the like in the raw water are removed by using the ultrafiltration device 12, the filtered raw water is introduced into the ultrafiltration water tank 13, and the raw water is kept stand at normal pressure to release the carbon dioxide in the raw water. Raw water in the ultrafiltration water tank 13 is pumped into the reverse osmosis device 14, most ions in the raw water are removed by the reverse osmosis device 14 to obtain production water, the production water is introduced into the vacuum decarburization tank 15, carbon dioxide is removed by using a vacuum environment, the ejector 11 absorbs the carbon dioxide removed in the vacuum decarburization tank 15 by using negative pressure, the production water is pumped into the EDI device 16 after the carbon dioxide is removed, and the production water is subjected to deep desalination treatment by the ED I device 16 to obtain desalted water.
The invention eliminates a secondary reverse osmosis device which is commonly used for removing carbon dioxide in the prior art, reduces a plurality of complex devices such as a dosing device, a detection device and the like, shortens the process route and further reduces the production cost; the invention adopts the vacuum decarbonization box 15 to remove the carbon dioxide from the produced water treated by the reverse osmosis device 14, and utilizes the power of the original water pump 10 to realize the continuous maintenance of the vacuum state of the vacuum decarbonization box 15, so that the continuously vacuumized gaseous air and the liquid air form a balance system, thereby further completing the closed loop of the process.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (9)
1. An energy-saving full-membrane-method filtering device comprises a water pump (10), an ejector (11), an ultrafiltration device (12), an ultrafiltration water tank (13), a reverse osmosis device (14), a vacuum decarburization tank (15) and an EDI device (16), and is characterized in that the water inlet end of the ejector (11) is connected with the water pump (10), the water outlet end of the ejector (11) is communicated with the ultrafiltration device (12), the ultrafiltration device (12) is communicated with the ultrafiltration water tank (13), the ultrafiltration water tank (13) is communicated with the reverse osmosis device (14), the reverse osmosis device (14) is communicated with the vacuum decarburization tank (15), the upper end of the vacuum decarburization tank (15) is communicated with the ejector (11), the lower end of the vacuum decarburization tank (15) is communicated with the EDI device (16), and the EDI device (16) is communicated with a water outlet; the vacuum decarburization device is characterized in that a negative pressure connecting hole (17) is formed in the ejector (11), and the upper end of the vacuum decarburization box (15) is connected to the negative pressure connecting hole (17) of the ejector (11).
2. The energy-saving full-membrane filtration plant according to claim 1, wherein the pressure in the ejector (11) is lower than the pressure in the vacuum decarbonization chamber (15).
3. The energy-saving full-membrane filtration plant according to claim 2, wherein the ejector (11) is used to continuously suck air in the vacuum decarbonization chamber (15).
4. The energy-saving full-membrane filtration equipment according to claim 1, wherein the pressure of the water pump (10) is 0.3-0.6 Mpa.
5. The energy-saving full-membrane filtration equipment according to claim 1, wherein the water inlet end of the water pump (10) is connected with a water source, and the water pump (10) is used for introducing raw water into the filtration equipment.
6. The energy-saving full-membrane filtration equipment according to claim 1, wherein the ultrafiltration water tank (13) is communicated with the external atmosphere, and the atmospheric pressure inside the ultrafiltration water tank (13) is normal pressure; the pressure in the ultrafiltration water tank (13) is smaller than the pressure in the ultrafiltration device (12).
7. The energy-saving full-membrane-method filtering equipment according to claim 1, wherein the ultrafiltration device (12) consists of a raw liquid tank, a raw liquid pump, an ultrafiltration membrane, an ultrafiltration liquid tank and a connected pipe valve, and the filtration pore diameter of the ultrafiltration membrane is 0.001-0.1 μm.
8. The energy-saving full-membrane filtration equipment according to claim 1, wherein the reverse osmosis device (14) comprises a multi-stage high-pressure pump, a reverse osmosis membrane element, a membrane shell, a bracket and the like, and the filtration pore diameter of the reverse osmosis membrane element is 0.0001-0.005 μm.
9. The energy-saving full-membrane filtration apparatus according to claim 1, wherein the EDI device (16) comprises an anion/cation exchange membrane, an ion exchange resin, a chemical cleaning device, a meter, a valve, piping and the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211554194.0A CN115849610A (en) | 2022-12-06 | 2022-12-06 | Energy-saving full-membrane-process filtering equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211554194.0A CN115849610A (en) | 2022-12-06 | 2022-12-06 | Energy-saving full-membrane-process filtering equipment |
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| Publication Number | Publication Date |
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| CN115849610A true CN115849610A (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211554194.0A Pending CN115849610A (en) | 2022-12-06 | 2022-12-06 | Energy-saving full-membrane-process filtering equipment |
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| CN (1) | CN115849610A (en) |
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- 2022-12-06 CN CN202211554194.0A patent/CN115849610A/en active Pending
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