CN214192831U - Reverse osmosis concentrated drainage recovery device - Google Patents
Reverse osmosis concentrated drainage recovery device Download PDFInfo
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- CN214192831U CN214192831U CN202022754271.XU CN202022754271U CN214192831U CN 214192831 U CN214192831 U CN 214192831U CN 202022754271 U CN202022754271 U CN 202022754271U CN 214192831 U CN214192831 U CN 214192831U
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Abstract
The utility model discloses a reverse osmosis concentrated drainage recovery device, which comprises a reverse osmosis concentrated drainage pool; the three neutralization sedimentation tanks are communicated with the reverse osmosis concentrated water discharge tank, and the water inlet ends and the water outlet ends of the neutralization sedimentation tanks are provided with valves; the positive resin softener is communicated with the neutralization sedimentation tank, and a delivery pump is arranged between the positive resin softener and the neutralization sedimentation tank; the secondary reverse osmosis device is communicated with the cation resin softener, and concentrated drainage water generated by treatment of the secondary reverse osmosis device enters a secondary concentrated drainage pool; the cation resin regeneration device comprises a salt pond, wherein the water inlet end of the salt pond is communicated with the secondary concentrated water discharge pond, and the water outlet end of the salt pond is communicated with the cation resin softener through a salt pump; the water outlet end of the industrial reservoir is provided with a three-way water using device; the reverse osmosis concentrated drainage is softened in a first-stage mode through the medicament, the cation resin is softened in a second-stage mode, the recovery rate of the outlet water is obviously improved when the reverse osmosis is performed again in a second-stage mode, the utilization rate of water resources is improved, after the cation resin softener is saturated in adsorption, partial salt can be added through the secondary concentrated drainage to increase the concentration of Na ions, the cation resin is regenerated, and the economic effect is good.
Description
Technical Field
This scheme relates to the dense drainage of reverse osmosis of power plant, concretely relates to dense drainage recovery unit of reverse osmosis.
Background
With the deep development and the trend of the polymer chemistry science, various novel membrane materials and membrane preparation technologies are rapidly developed in recent years, and a reverse osmosis membrane separation technology is used as an advanced technology for water treatment in the world, has the advantages of economy, high efficiency, simple and convenient operation, no need of adding acid or alkali, small occupied area and the like compared with the traditional water treatment method, and is widely applied to the fields of seawater and brackish water desalination, pure water preparation, concentration and recovery of chemical products and the like. With the increasing variety and quality of membranes, the equipment is also improved, and in recent years, reverse osmosis technology is increasingly widely applied in the fields of urban sewage recycling, industrial wastewater treatment and the like.
Reverse osmosis is a treatment technology which uses pressure (1-10 MPa) to make water in a solution pass through a reverse osmosis membrane to achieve the purposes of separation, extraction, purification, concentration and the like, and can remove not only salts and other ionic substances, but also organic substances, colloids, bacteria and viruses. However, the current reverse osmosis technology generally has a designed water yield of 75%, and the actual water yield is lower, and about 30% of strong brine is generated. If the raw water is underground brackish water or seawater with very poor water quality, the generation amount of the concentrated water is larger and can reach 50 percent. Concentrated water generated by a plurality of reverse osmosis processes is not directly discharged after being treated, so that waste of water resources and energy is caused, the surrounding environment is polluted, and if the concentrated water is discharged into a municipal sewage treatment system, adverse effects can be generated on a biochemical system.
SUMMERY OF THE UTILITY MODEL
To the problem that exists, the utility model provides a dense drainage recovery unit of reverse osmosis.
In order to realize the purpose, the utility model discloses the technical scheme who takes is:
a reverse osmosis concentrated drain recovery device comprising:
the reverse osmosis concentrated drainage tank is used for storing concentrated drainage of industrial wastewater subjected to reverse osmosis treatment;
each neutralization sedimentation tank is communicated with the reverse osmosis concentrated water discharge tank through a pipeline, and a valve is arranged on the pipeline between each neutralization sedimentation tank and the reverse osmosis concentrated water discharge tank;
the cation resin softener is communicated with the neutralization sedimentation tanks through pipelines, and valves and a delivery pump are arranged between the neutralization sedimentation tanks and the pipelines of the cation resin softener;
the secondary reverse osmosis part comprises a secondary reverse osmosis device and a secondary concentrated water discharge pool, wherein the secondary reverse osmosis device is communicated with the positive resin softener and the secondary concentrated water discharge pool through pipelines, and concentrated water discharged by the treatment of the secondary reverse osmosis device enters the secondary concentrated water discharge pool;
the cation resin regeneration device comprises a salt pond, the salt pond is communicated with the secondary concentrated water discharge pond and the cation resin softener through pipelines, and the pipelines of the salt pond and the cation resin softener are provided with salt pumps;
and the industrial reservoir is communicated with the secondary reverse osmosis device through a pipeline and is used for storing the cleaning water treated by the secondary reverse osmosis device, the industrial reservoir is connected with at least two different water using devices through pipelines, and a valve is arranged between the industrial reservoir and each water using device.
Further, in the reverse osmosis concentrated drainage recovery device, the valve is an electromagnetic valve, the water outlet end of the secondary reverse osmosis device is provided with the water hardness detector, and the reverse osmosis concentrated drainage recovery device further comprises a PLC (programmable logic controller) for receiving data of the water hardness detector, sending a control signal to control the on/off of the electromagnetic valve to complete the sequential inlet or outlet of concentrated drainage of each neutralization sedimentation tank, and controlling the on/off selection of the salt pump to regenerate the cation resin softener.
Furthermore, the reverse osmosis concentrated drainage recovery device is provided with three neutralization sedimentation tanks and three water using devices.
The embodiment of the utility model provides a beneficial effect is:
1. feeding water into each neutralization sedimentation tank from the reverse osmosis concentrated water discharge tank in sequence, synchronously adding a medicament for neutralization reaction and sedimentation, when the water feeding of the last neutralization sedimentation tank is finished, feeding the water discharged from the first neutralization sedimentation tank after the sedimentation is finished into a positive resin softener, adsorbing and removing calcium and magnesium ions in the backwashing concentrated water by using the positive resin softener, softening the reverse osmosis concentrated water to reduce the water hardness, treating by using a secondary reverse osmosis device to reduce the COD (chemical oxygen demand) in the reverse osmosis concentrated water to obtain four-class to five-class water meeting the discharge standard or use standard, and then sending the water to a water using device for reuse, thereby improving the utilization rate of water resources;
2. after the cation resin softener is saturated in adsorption, the Na ion concentration is increased by adding partial salt in secondary concentrated drainage to realize the regeneration of the cation resin, so that the economic effect is increased.
Drawings
FIG. 1 is a schematic structural view of the reverse osmosis concentrated drainage recovery device of the present invention;
fig. 2 is a schematic structural diagram of the reverse osmosis concentrated drainage recovery device of the present invention in embodiment 2.
Reference numerals in the drawings of the specification include: the system comprises a reverse osmosis concentrated water discharge tank 1, a first neutralization sedimentation tank 2, a second valve 201, a third valve 202, a second neutralization sedimentation tank 3, a fourth valve 301, a fifth valve 302, a third neutralization sedimentation tank 4, a sixth valve 401, a seventh valve 402, a conveying pump 5, a positive resin softener 6, a secondary reverse osmosis device 7, a secondary concentrated water discharge tank 8, a salt tank 9, a salt pump 90, an industrial water storage tank 10, a first water heater 11, an eighth valve 110, a second water heater 12, a ninth valve 120, a third water heater 13, a tenth valve 130, a water hardness detector 14 and a PLC (programmable logic controller) 15.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1: with reference to FIG. 1
A reverse osmosis concentrated drain recovery device comprising:
the reverse osmosis concentrated water discharge pool 1 is used for storing concentrated water discharged by the reverse osmosis treatment of the industrial wastewater;
at least two neutralization and sedimentation tanks, wherein the drawing schematically comprises a first neutralization and sedimentation tank 2, a second neutralization and sedimentation tank 3 and a third neutralization and sedimentation tank 4, each neutralization and sedimentation tank is communicated with a reverse osmosis concentrated water discharge tank 1 through a pipeline, a valve is arranged on the pipeline between each neutralization and sedimentation tank and the reverse osmosis concentrated water discharge tank 1, a valve II 201 is arranged between the pipelines of the first neutralization and sedimentation tank 2 and the reverse osmosis concentrated water discharge tank 1, a valve IV 301 is arranged between the pipelines of the second neutralization and sedimentation tank 3 and the reverse osmosis concentrated water discharge tank 1, and a valve VI 401 is arranged between the pipelines of the third neutralization and sedimentation tank 4 and the reverse osmosis concentrated water discharge tank 1;
the cation resin softener 6 is communicated with the neutralization sedimentation tanks through pipelines, valves are arranged between the neutralization sedimentation tanks and the pipelines of the cation resin softener 6, a conveying pump 5 is arranged, a third valve 202 is arranged between the first neutralization sedimentation tank 2 and the pipelines of the cation resin softener 6, a fifth valve 302 is arranged between the second neutralization sedimentation tank 3 and the pipelines of the cation resin softener 6, a seventh valve 402 is arranged between the third neutralization sedimentation tank 4 and the pipelines of the cation resin softener 6, and the conveying pump 5 is arranged on the pipelines at the rear parts of the third valve 202, the fifth valve 302 and the seventh valve 402;
a secondary reverse osmosis part comprising a secondary reverse osmosis device 7 and a secondary concentrated water discharge pool 8, wherein the secondary reverse osmosis device 7 is communicated with the positive resin softener 6 and the secondary concentrated water discharge pool 8 through pipelines, and concentrated water discharged by the treatment of the secondary reverse osmosis device 7 enters the secondary concentrated water discharge pool 8;
the cation resin regeneration device comprises a salt pond 9, wherein the salt pond 9 is communicated with a secondary concentrated water discharge pond 8 and a cation resin softener 6 through pipelines, and a salt pump 90 is arranged on the pipelines of the salt pond 9 and the cation resin softener 6;
the industrial water storage tank 10 is communicated with the secondary reverse osmosis device 7 through a pipeline and is used for storing the clean water treated by the secondary reverse osmosis device 7, the industrial water storage tank 10 is connected with at least two different water using devices through pipelines, and a valve is arranged between the industrial water storage tank 10 and each water using device through the pipeline; the figure specifically shows that the device comprises a first water heater 11, a second water heater 12 and a third water heater 13, wherein a valve eight 110 is arranged between pipelines of the first water heater 11 and the industrial water reservoir 10, a valve nine 120 is arranged between pipelines of the second water heater 12 and the industrial water reservoir 10, and a valve ten 130 is arranged between pipelines of the third water heater 13 and the industrial water reservoir 10, and the corresponding valves are respectively opened to realize different purposes of cleaning water.
The working principle is as follows: the concentrated wastewater treated by the reverse osmosis membrane is sent into a reverse osmosis concentrated wastewater tank 1, a valve II 201 is opened at first, the reverse osmosis concentrated wastewater is supplied to a first neutralization sedimentation tank 2, and a medicament is synchronously added, wherein the medicament is added according to the specific type of the reverse osmosis concentrated wastewater; after the water feeding of the first neutralization sedimentation tank 2 is finished, a valve IV 301 is opened, a valve II 201 is closed, reverse osmosis concentrated drainage is supplied to the second neutralization sedimentation tank 3, and a medicament is synchronously added for sedimentation, after the second neutralization sedimentation tank 3 is filled with reverse osmosis water, a valve III 202 and a valve VI 401 are opened, a valve IV 301 is closed, reverse osmosis concentrated drainage is supplied to the third neutralization sedimentation tank 4, and medicament sedimentation is synchronously added, the first neutralization sedimentation tank 2 is opened, so that the second neutralization sedimentation tank 3 and the third neutralization sedimentation tank 4 circulate water inlet and outlet, a conveying pump 5 is started to supply water to the cation resin softener 6 for adsorption to remove calcium and magnesium ions in the reverse osmosis concentrated drainage, and then the reverse osmosis concentrated drainage is sent to a secondary reverse osmosis device 7, the water hardness is low due to primary softening in the neutralization sedimentation tank and secondary softening in the cation resin softener 6, the recovery rate of the secondary reverse osmosis device 7 can be adjusted to 90%, and salt scaling pollution can not exist, the desalination rate can reach more than 95 percent, and the effluent can be used as make-up water for industrial projects, or greening water, or road spraying water, which corresponds to the three water consumption devices.
Example 2: refer to FIG. 2
Compared with the embodiment 1, the difference is that all the valves are electromagnetic valves, the water outlet end of the secondary reverse osmosis device 7 is provided with a water hardness detector 14, the reverse osmosis concentrated drainage recovery device also comprises a PLC 15 which is used for receiving the data of the water hardness detector 14, sending out a control signal to control the on/off of the electromagnetic valves to complete the sequential inlet or outlet of concentrated drainage of various neutralization sedimentation tanks, and controlling the on/off selection of the salt pump 90 to regenerate the positive resin softener 6; the electromagnetic valve is selected to be matched with the PLC 15 to realize automatic reverse osmosis concentrated drainage, the reverse osmosis concentrated drainage is supplied to the automatic cycle switching of the three neutralization sedimentation tanks, and when the water quality detector detects that the hardness of the outlet water of the secondary reverse osmosis device 7 rises, the salt pump 90 is automatically started to regenerate the cation resin softener 6 by utilizing the secondary reverse osmosis concentrated drainage, so that the economic benefit is improved.
The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (3)
1. A reverse osmosis concentrated drain recovery device, comprising:
the reverse osmosis concentrated water discharge pool (1) is used for storing concentrated water discharged by the reverse osmosis treatment of the industrial wastewater;
each neutralization sedimentation tank is communicated with the reverse osmosis concentrated water discharge tank (1) through a pipeline, and a valve is arranged on the pipeline between each neutralization sedimentation tank and the reverse osmosis concentrated water discharge tank (1);
the positive resin softener (6) is communicated with the neutralization sedimentation tanks through pipelines, and valves and a delivery pump (5) are arranged between the neutralization sedimentation tanks and the pipelines of the positive resin softener (6);
a secondary reverse osmosis part which comprises a secondary reverse osmosis device (7) and a secondary concentrated water discharge pool (8), wherein the secondary reverse osmosis device (7) is communicated with the cation resin softener (6) and the secondary concentrated water discharge pool (8) through pipelines, and concentrated water discharged by the treatment of the secondary reverse osmosis device (7) enters the secondary concentrated water discharge pool (8);
the cation resin regeneration device comprises a salt pond (9), wherein the salt pond (9), the secondary concentrated water discharge pond (8) and the cation resin softener (6) are communicated through pipelines, and salt pumps (90) are arranged on the pipelines of the salt pond (9) and the cation resin softener (6);
and the industrial water storage tank (10) is communicated with the secondary reverse osmosis device (7) through a pipeline and is used for storing the cleaning water treated by the secondary reverse osmosis device (7), the industrial water storage tank (10) is connected with at least two different water using devices through pipelines, and a valve is arranged between the industrial water storage tank (10) and each water using device.
2. A reverse osmosis concentrated drain recovery device according to claim 1, wherein: the valve is an electromagnetic valve, a water quality hardness detector (14) is arranged at the water outlet end of the secondary reverse osmosis device (7), the reverse osmosis concentrated drainage recovery device further comprises a PLC (programmable logic controller) (15) which is used for receiving data of the water quality hardness detector (14), sending out a control signal to control the opening/closing of the electromagnetic valve to complete the sequential inlet or outlet of concentrated drainage of each neutralization sedimentation tank, and controlling the opening/closing of the salt pump (90) to select the regeneration of the positive resin softener (6).
3. A reverse osmosis concentrated drain recovery device according to claim 1 or 2, wherein: the neutralization sedimentation tank and the water using device are respectively provided with three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022754271.XU CN214192831U (en) | 2020-11-25 | 2020-11-25 | Reverse osmosis concentrated drainage recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022754271.XU CN214192831U (en) | 2020-11-25 | 2020-11-25 | Reverse osmosis concentrated drainage recovery device |
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| Publication Number | Publication Date |
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| CN214192831U true CN214192831U (en) | 2021-09-14 |
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| CN202022754271.XU Active CN214192831U (en) | 2020-11-25 | 2020-11-25 | Reverse osmosis concentrated drainage recovery device |
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| CN (1) | CN214192831U (en) |
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