CN210944946U - Reverse osmosis concentrated water recovery device - Google Patents
Reverse osmosis concentrated water recovery device Download PDFInfo
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- CN210944946U CN210944946U CN201921430299.9U CN201921430299U CN210944946U CN 210944946 U CN210944946 U CN 210944946U CN 201921430299 U CN201921430299 U CN 201921430299U CN 210944946 U CN210944946 U CN 210944946U
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Abstract
The utility model discloses a reverse osmosis concentrated water recovery device, which relates to the technical field of reverse osmosis concentrated water and comprises a reverse osmosis device; the inlet of the first water inlet valve is communicated with the inlet pipe, and the outlet of the first water inlet valve is communicated with the inlet of the reverse osmosis device; an inlet of the sixth flushing discharge valve is communicated with an outlet of the fifth water inlet valve and a waste liquid outlet of the reverse osmosis device, and an outlet of the sixth flushing discharge valve is externally connected with a concentrated water collecting tank; the inlet of the second concentrated water discharge valve is communicated with the inlet of the reverse osmosis device, and the second outlet of the second concentrated water discharge valve is externally connected with a concentrated water collecting tank; the inlet of the third concentrated water discharge valve is communicated with the inlet of the reverse osmosis device, and the outlet of the third concentrated water discharge valve is externally connected with a concentrated water collecting tank. The utility model has the advantages that the water inlet reversing and full fast flushing are realized, the load of membrane elements in the system is effectively balanced, the scaling risk is reduced, and the system runs without stopping for a long time; effectively reduces the external drainage of reverse osmosis concentrated water, obviously reduces water consumption, saves water resources, has great environmental protection benefit and economic benefit, and can lay a foundation for realizing the zero discharge of the wastewater of the whole plant.
Description
Technical Field
The utility model relates to a dense water technical field of reverse osmosis, especially a dense water recovery unit of reverse osmosis.
Background
The reverse osmosis technology is used as a cross-flow filtration technology, the defect that water consumption is high cannot be avoided is that at present, the recovery rate of a reverse osmosis system is generally set to be about 75%, the residual 25% of concentrated water is directly discharged, and effective recycling cannot be achieved, so that energy and water resources are wasted. Therefore, the problem about recycling of reverse osmosis concentrated water is imperative, and the reverse osmosis concentrated water is recycled, so that great environmental benefit and economic benefit can be obtained.
The reverse osmosis concentrated water cannot be directly recycled due to high salt content, and generally starts from reducing the discharge amount of the concentrated water. There are three conventional ways to reduce the discharge amount of concentrate, the first is to set a concentrate reflux to return a certain amount of concentrate to the inlet of the high pressure pump or to the intermediate tank. The second is that a set of concentrated water recovery reverse osmosis is additionally arranged after the concentrated water is collected. The third is to use the residual pressure of the original permeating concentrated water as the power for recovering the concentrated water and directly recover the reverse osmosis concentrated water.
There are three kinds of modes to reduce dense water discharge amount traditionally, and the first is to set up the dense water backward flow, gets back a certain amount of dense water to the high-pressure pump entry or get back to middle water tank, and membrane pollution can all be aggravated to these two modes because except having inorganic salt scale deposit risk in the dense water, organic and colloid pollutant exist in addition, and this kind of backward flow can produce the problem of polluting repeatedly. The second is to add a set of dense water recovery reverse osmosis in addition after the dense water is collected, and this kind of mode and former system physics are kept apart, can not appear the repeated pollution problem, but this kind of mode also has the shortcoming: 1. the concentrated water enters the collecting box for pressure relief, and is additionally pressurized when entering the concentrated water recovery reverse osmosis, so that additional energy consumption is generated; 2. the insoluble salt temporarily controlled by the scale inhibitor in the concentrate can be separated out after the scale inhibitor is invalid and can be deposited in a water tank or a concentrate reverse osmosis pretreatment system (such as an ultrafiltration membrane wire). 3. The method has the advantages of large investment, complex system, large occupied area and high energy consumption. The third is the reverse osmosis concentrated water recovery technology without additional power which has just started to rise in recent years, the technology utilizes the residual pressure of the original osmosis concentrated water as the power for recovering the concentrated water, overcomes the defects of the second and also saves the occupied land, but because the reverse osmosis concentrated water has large salt content, poor water quality, high osmotic pressure and lower residual pressure of the concentrated water, the water yield can not meet the requirements and the output of each membrane element in the membrane shell of the concentrated water recovery device is uneven, the heavy pollutants loaded by the first two reverse osmosis membranes are easy to deposit, thereby further influencing the service life of the whole concentrated water recovery device.
At present, reverse osmosis concentrated water recovery technology at home and abroad has certain application, but because the reverse osmosis concentrated water has poor water quality and high osmotic pressure, the reverse osmosis membrane is easy to pollute when the reverse osmosis concentrated water is recovered, the water yield is reduced, and the service life of a concentrated water recovery device is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at improving the recovery rate of the concentrated water and overcoming the defects of low residual pressure of the reverse osmosis concentrated water, easy pollution of the reverse osmosis membrane and the like, and designs a reverse osmosis concentrated water recovery device.
In order to realize the above purpose, the technical scheme of the utility model be, a dense water recovery unit of reverse osmosis, including reverse osmosis unit, reverse osmosis unit's the external ultrafiltration of filtrating outlet pipe produces the water tank, still includes: the inlet of the first water inlet valve is communicated with the inlet pipe, and the outlet of the first water inlet valve is communicated with the inlet of the reverse osmosis device; the inlet of the fifth water inlet valve is communicated with the inlet pipe; an inlet of the sixth flushing discharge valve is communicated with an outlet of the fifth water inlet valve and a waste liquid outlet of the reverse osmosis device, and an outlet of the sixth flushing discharge valve is externally connected with a concentrated water collecting tank; the inlet of the second concentrated water discharge valve is communicated with the inlet of the reverse osmosis device, and the outlet of the second concentrated water discharge valve is externally connected with a concentrated water collecting tank; the inlet of the third concentrated water discharge valve is communicated with the inlet of the reverse osmosis device, and the outlet of the third concentrated water discharge valve is externally connected with a concentrated water collecting tank; and the inlet of the fourth concentrated water discharge valve is communicated with the outlet of the third concentrated water discharge valve, and the outlet of the fourth concentrated water discharge valve is externally connected with a concentrated water collecting tank.
Furthermore, flow transmitters are arranged on an outlet pipeline of the third concentrated water discharge valve and an outlet pipeline of the fourth concentrated water discharge valve.
Further, the reverse osmosis device has two.
Furthermore, a pressure gauge a and a pressure transmitter a are arranged on a pipeline at the front end of an inlet of the reverse osmosis device.
Furthermore, a pressure gauge b and a pressure transmitter b are arranged on a pipeline at the rear end of a waste liquid outlet of the reverse osmosis device.
Furthermore, check valves are arranged on an outlet of the third concentrated water discharge valve and an outlet pipeline of the fourth concentrated water discharge valve.
The utility model has the advantages that: the water inlet direction reversal and full fast flushing are realized, the membrane element load of the system is effectively balanced, the scaling risk is reduced, and the long-time non-stop running of the system is realized; the technical theory is scientific and reliable, and is an optimized improvement on the existing mature reverse osmosis technology; the method is suitable for recycling the existing reverse osmosis concentrated water, effectively reduces the external drainage of the reverse osmosis concentrated water, obviously reduces water consumption, saves water resources, has great environmental protection benefit and economic benefit, and can lay a foundation for realizing the zero discharge of the wastewater of the whole plant; the unique frequent inversion process design ensures that the output of each membrane element of the reverse osmosis concentrated water recovery device is balanced, avoids the easy deposition of the first two heavy-load pollutants and ensures the stable and reliable operation of the concentrated water recovery device; the operation cost is low, no new power equipment is added, no new medicament is consumed, no extra energy consumption is generated, and almost no operation cost exists.
Drawings
Fig. 1 is a schematic structural view of a reverse osmosis concentrated water recovery apparatus according to the present application.
In the above figures, 1, a first water inlet valve; 2. a second concentrated water discharge valve; 3. a third concentrated water discharge valve; 4. a fourth concentrated water discharge valve; 5. a fifth water inlet valve; 6. a sixth flush drain valve; 7. a reverse osmosis unit; 8. an ultrafiltration water production tank; 9. a concentrated water collecting tank; 10. a flow transmitter; 11. a pressure gauge; 12. a pressure transmitter a; 13. a pressure gauge b; 14. and (b) a pressure transmitter. 15. A check valve.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose of the present invention, the following detailed description is given to the embodiments, structures, features and effects according to the present invention with reference to the accompanying drawings and preferred embodiments as follows:
the utility model provides a reverse osmosis concentrated water recovery unit, includes reverse osmosis unit, first inlet valve, fifth inlet valve, sixth wash discharge valve, second concentrated water discharge valve, third concentrated water discharge valve and fourth concentrated water discharge valve.
The filtrate outlet pipeline of the reverse osmosis device is externally connected with an ultrafiltration water production tank. The inlet of the first water inlet valve is communicated with the inlet pipe, and the outlet of the first water inlet valve is communicated with the inlet of the reverse osmosis device. The inlet of the fifth water inlet valve is communicated with the inlet pipe. The inlet of the sixth flushing discharge valve is communicated with the outlet of the fifth water inlet valve and the waste liquid outlet of the reverse osmosis device, and the outlet of the sixth flushing discharge valve is externally connected with a concentrated water collecting tank. The inlet of the second concentrated water discharge valve is communicated with the inlet of the reverse osmosis device, and the outlet of the second concentrated water discharge valve is externally connected with a concentrated water collecting tank. The inlet of the third concentrated water discharge valve is communicated with the inlet of the reverse osmosis device, and the outlet of the third concentrated water discharge valve is externally connected with a concentrated water collecting tank. The inlet of the fourth concentrated water discharge valve is communicated with the outlet of the third concentrated water discharge valve, and the outlet of the fourth concentrated water discharge valve is externally connected with a concentrated water collecting tank.
Preferably, flow transmitters are arranged on the outlet pipeline of the third concentrated water discharge valve and the outlet pipeline of the fourth concentrated water discharge valve. The reverse osmosis device has two. The front end pipeline of the inlet of the reverse osmosis device is provided with a pressure gauge a and a pressure transmitter a. And a pressure gauge b and a pressure transmitter b are arranged on a pipeline at the rear end of a waste liquid outlet of the reverse osmosis device. And check valves are arranged on the outlet of the third concentrated water discharge valve and the outlet pipeline of the fourth concentrated water discharge valve.
Start-up procedure
1. Front end water inlet starting flushing
Opening the sixth flushing discharge valve 6, the fourth concentrated water discharge valve 4 and the first water inlet valve 1, and flushing for about 2min (time is adjustable);
2. front end water feed operation
The sixth flush drain valve 6 is closed and the apparatus enters the front end feed operation stage.
3. Front end water inflow switching and rear end water inflow preparation:
after 1 hour (time is adjustable), entering a front-end water inlet switching rear-end water inlet preparation stage, and opening a second concentrated water discharge valve 2, a third concentrated water discharge valve 3 and a fifth water inlet valve 5;
4. rear end water inlet flushing
And 3s (time is adjustable), closing the first water inlet valve 1 and the fourth concentrated water discharge valve 4, and flushing the system for 2min (time is adjustable) after the system enters a rear end water inlet flushing stage.
5. Back end water feed operation
And closing the second concentrated water discharge valve 2, and enabling the equipment to enter a rear end water inlet operation stage.
6. Rear-end water-intake switching front-end water-intake preparation
After 1 hour (time is adjustable), entering a front-end water inlet preparation stage of rear-end water inlet switching, and opening a sixth flushing discharge valve 6, a fourth concentrated water discharge valve 4 and a first water inlet valve 1;
7. front end water inlet flushing
After 3s (time is adjustable), the fifth water inlet valve 5 and the third concentrated water discharge valve 3 are closed, and the system enters a rear end water inlet flushing stage and is flushed for 2min (time is adjustable).
8. Front end water feed operation
The sixth flush drain valve 6 is closed and the apparatus enters the front end feed operation stage.
And then, switching between front-end water inlet and rear-end water inlet is carried out every 1 hour (time is adjustable), so that the phenomenon that the front two heavy-load pollutants are easy to deposit due to uneven output of six membranes in the RO system section is avoided.
Shut down procedure
When preceding one-level reverse osmosis system stopped the operation, high-pressure pump stopped the operation promptly after, 15s back, the valve gets into the front end and intakes the start-up state of washing, opens the sixth promptly and washes discharge valve 6, fourth dense water discharge valve 4 and first intake valve 1, all the other valves are in the closed condition.
The application is a dense water recovery unit of reverse osmosis of no additional power formula of frequently falling, when using, has following advantage:
(1) the concentrated water recovery device is directly arranged above the original reverse osmosis device group frame, so that the occupied area is saved.
(2) The original reverse osmosis concentrated water drainage pipeline is reformed, and meanwhile, the automatic valve and the bypass thereof are additionally arranged, so that the reverse osmosis concentrated water can be directly led to the concentrated water recovery device without additional power, and the whole system can realize program control operation.
(3) Through frequently switching the membrane shell direction of intaking, dense water discharge, guarantee that each reverse osmosis membrane load balance in the membrane shell, avoid certain reverse osmosis membrane load big and influence dense water recovery unit's life.
(4) The reverse osmosis membrane element of the concentrated water recovery device is specially pretreated, so that the osmotic pressure of the membrane is reduced on the premise of ensuring the desalination rate, and the defect of low residual pressure of reverse osmosis concentrated water is overcome;
(5) the auxiliary systems of the concentrated water recovery device, such as a dosing and chemical cleaning system, can utilize the original equipment.
After transformation, the desalination rate of the concentrated water recovery system is as follows: 85-95%, water recovery rate: 50 to 60 percent.
The following table is a program table of a first-level reverse osmosis concentrated water recycling system without additional power and in frequent reverse direction
The invention has been described above with reference to a preferred embodiment, but the scope of protection of the invention is not limited thereto, and various modifications can be made and equivalents can be substituted for elements thereof without departing from the scope of the invention, and features mentioned in the various embodiments can be combined in any way as long as there is no structural conflict, and any reference sign in the claims should not be construed as limiting the claim concerned, and the embodiments should be regarded as being exemplary and non-limiting in any way whatsoever. Therefore, all technical solutions that fall within the scope of the claims are within the scope of the present invention.
Claims (6)
1. The utility model provides a dense water recovery unit of reverse osmosis, includes reverse osmosis unit (7), the external ultrafiltration of filtrating outlet conduit of reverse osmosis unit (7) produces water tank (8), its characterized in that still includes:
the inlet of the first water inlet valve (1) is communicated with the inlet pipe, and the outlet of the first water inlet valve (1) is communicated with the inlet of the reverse osmosis device (7);
the inlet of the fifth water inlet valve (5) is communicated with the inlet pipe;
an inlet of the sixth flushing discharge valve (6) is communicated with an outlet of the fifth water inlet valve (5) and a waste liquid outlet of the reverse osmosis device (7), and an outlet of the sixth flushing discharge valve (6) is externally connected with a concentrated water collecting tank (9);
the inlet of the second concentrated water discharge valve (2) is communicated with the inlet of the reverse osmosis device (7), and the outlet of the second concentrated water discharge valve (2) is externally connected with a concentrated water collecting tank (9);
the inlet of the third concentrated water discharge valve (3) is communicated with the inlet of the reverse osmosis device (7), and the outlet of the third concentrated water discharge valve (3) is externally connected with a concentrated water collecting tank (9); and
the inlet of the fourth concentrated water discharge valve (4) is communicated with the outlet of the third concentrated water discharge valve (3), and the outlet of the fourth concentrated water discharge valve (4) is externally connected with a concentrated water collecting tank (9).
2. A reverse osmosis concentrate recovery device according to claim 1, wherein the outlet of the third concentrate discharge valve (3) and the outlet pipe of the fourth concentrate discharge valve (4) are provided with flow transmitters (10).
3. A reverse osmosis concentrate recovery device according to claim 1, wherein there are two reverse osmosis devices (7).
4. The reverse osmosis concentrated water recovery device according to claim 1, wherein a pressure gauge a (11) and a pressure transmitter a (12) are arranged on an inlet front end pipeline of the reverse osmosis device (7).
5. A reverse osmosis concentrated water recovery device according to claim 1, wherein a pressure gauge b (13) and a pressure transmitter b (14) are arranged on a waste liquid outlet back end pipeline of the reverse osmosis device (7).
6. A reverse osmosis concentrate recovery device according to claim 1, wherein the outlet of the third concentrate discharge valve (3) and the outlet line of the fourth concentrate discharge valve (4) are provided with check valves (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921430299.9U CN210944946U (en) | 2019-08-29 | 2019-08-29 | Reverse osmosis concentrated water recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921430299.9U CN210944946U (en) | 2019-08-29 | 2019-08-29 | Reverse osmosis concentrated water recovery device |
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| Publication Number | Publication Date |
|---|---|
| CN210944946U true CN210944946U (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921430299.9U Active CN210944946U (en) | 2019-08-29 | 2019-08-29 | Reverse osmosis concentrated water recovery device |
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| Country | Link |
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| CN (1) | CN210944946U (en) |
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- 2019-08-29 CN CN201921430299.9U patent/CN210944946U/en active Active
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