CN215161949U - Reverse osmosis concentrated water recovery device - Google Patents
Reverse osmosis concentrated water recovery device Download PDFInfo
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- CN215161949U CN215161949U CN202120805187.8U CN202120805187U CN215161949U CN 215161949 U CN215161949 U CN 215161949U CN 202120805187 U CN202120805187 U CN 202120805187U CN 215161949 U CN215161949 U CN 215161949U
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Abstract
The utility model relates to the technical field of sewage treatment devices, in particular to a reverse osmosis concentrated water recovery device, which comprises a pretreatment unit, an oxidation tank, an activated carbon biological filter, a sand filtration device, an ultrafiltration device, a nanofiltration device and an evaporative crystallization system which are connected in sequence, wherein the recovery device also comprises an ozone catalytic tower; wherein receive filter device's clear water output and evaporation crystallization system and be connected for the clear water input evaporation crystallization system that will receive filter device production, the dense water output that receives filter device is connected with ozone catalytic tower's the end of intaking, and ozone catalytic tower's the end of giving out water and pretreatment unit's the end of intaking is connected, the utility model discloses a set up ultrafiltration device, receive filter device to and modules such as evaporation crystallization system can handle dense water, realize retrieving the purpose of dense water, but also can retrieve the salinity in the dense water.
Description
Technical Field
The utility model relates to a sewage treatment plant technical field especially relates to a dense water recovery unit of reverse osmosis.
Background
With the development of reverse osmosis technology, the technology is widely applied to the fields of metallurgy, chemical industry and the like, but the problem of sewage is brought along with the technology, the reverse osmosis treatment technology can generate more concentrated water when in use, more pollutants exist in the concentrated water, and if the pollutants are directly discharged, the environment can be polluted, and the waste of water resources can be caused, so that a device capable of recycling the concentrated water needs to be designed.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a reverse osmosis dense water recovery unit.
In order to solve the technical problem, the technical scheme of the utility model is that:
a reverse osmosis concentrated water recovery device comprises a pretreatment unit, an oxidation tank, an activated carbon biological filter, a sand filtration device, an ultrafiltration device, a nanofiltration device and an evaporative crystallization system which are connected in sequence, wherein the recovery device also comprises an ozone catalytic tower; the clear water output end of the nanofiltration device is connected with the evaporative crystallization system and used for inputting clear water generated by the nanofiltration device into the evaporative crystallization system, the concentrated water output end of the nanofiltration device is connected with the water inlet end of the ozone catalytic tower, and the water outlet end of the ozone catalytic tower is connected with the water inlet end of the pretreatment unit.
Further, the pretreatment unit comprises a sedimentation tank, a sludge tank and a filter press which are connected with the oxidation tank; wherein the sludge tank is used for receiving sludge generated by sedimentation in the sedimentation tank, the filter press is used for filter-pressing the sludge in the sludge tank, and the sewage discharge end of the filter press is connected with the sedimentation tank.
Further, the ozone catalytic tower comprises a tower body and a catalyst packing layer arranged in the tower body;
the upper part of the tower body is provided with a water inlet connected with the concentrated water output end of the nanofiltration device; the lower part of the tower body is provided with a water outlet, wherein the water outlet is connected with the water inlet end of the pretreatment unit; a spray pipe which is communicated with the water inlet and sprays water to one side of the catalyst packing layer is arranged in the tower body; the spray pipe is positioned above the catalyst packing layer;
the lower part of the tower body is provided with an air inlet for ozone to enter, wherein the air inlet is positioned at the lower part of the catalyst packing layer; and an exhaust port is arranged at the top of the tower body.
Furthermore, an air inlet pipe communicated with the air inlet is arranged in the tower body, and an aeration disc for aerating to one side of the catalyst packing layer is arranged at the end part of the air inlet pipe.
Further, the sand filtering device is a sand filtering tank or a sand filter.
Further, the evaporative crystallization system is a triple-effect evaporator.
Compare prior art, the utility model has the advantages that:
the utility model discloses a set up ultrafiltration device, receive the filter equipment to and modules such as evaporation crystallization system can handle dense water, realize retrieving the purpose of dense water, but also can retrieve the salinity in the dense water.
And, the utility model discloses in come to carry out the secondary oxidation to the second grade dense water of receiving the filter production through setting up ozone oxidation tower to retrieve once more in the thick water after will oxidizing the leading-in system once more, so alright improve the recovery effect of whole dense water.
Drawings
FIG. 1 is a block diagram of the present invention
FIG. 2 is a schematic structural diagram of an ozone catalytic tower.
Reference numerals: 1. a pre-processing unit; 11. a sedimentation tank; 12. a sludge tank; 23. a filter press; 2. an oxidation pond; 3. an activated carbon biological filter; 4. a sand filtration device; 5. an ultrafiltration device; 6. a nanofiltration device; 7. An evaporative crystallization system; 8. an ozone catalytic tower; 81. a tower body; 82. a catalyst packing layer; 83. a water inlet; 84. a water outlet; 85. a shower pipe; 86. an air inlet; 87. an air inlet pipe; 88. an aeration disc; 89. and (7) an exhaust port.
Detailed Description
The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and grasped.
Example (b):
as shown in fig. 1, the present embodiment provides a reverse osmosis concentrated water recovery device, which includes a pretreatment unit 1, an oxidation tank 2, an activated carbon biological filter 3, a sand filtration device 4, an ultrafiltration device 5, a nanofiltration device 6, and an evaporative crystallization system 7, which are connected in sequence, and the recovery device further includes an ozone catalytic tower 8.
In this embodiment, the pretreatment unit 1 includes a sedimentation tank 11, a sludge tank 12, and a filter press 23.
The sedimentation tank 11 is mainly used for performing coagulation sedimentation treatment on the concentrated water, specifically, when in use, lime and soda ash are added into the sedimentation tank 11, so that calcium and magnesium (hardness components) dissolved in the concentrated water react with the lime and the soda ash to generate calcium carbonate and magnesium hydroxide sediments, and silica in the water is adsorbed by the magnesium hydroxide sediments generated by the softening reaction, or a coprecipitation reaction occurs, specifically, the following reaction formula:
SiO2+Mg(OH)2(s)-->Mg(HSiO3)2(s), wherein(s) represents precipitation.
The sludge generated by the sedimentation reaction in the sedimentation tank 11 can be transferred to the sludge tank 12, in other words, the sludge tank 12 is used for receiving the sludge generated by the sedimentation in the sedimentation tank 11.
In order to recover moisture in the sludge, the sludge in the sludge tank 12 may be introduced into the filter press 23 and filter-pressed by the filter press 23, and the filter press 23 is a conventional device for sludge treatment, and thus the structure thereof will not be described in detail.
The sludge can form two parts after being subjected to filter pressing treatment by the filter press 23, wherein one part is sludge with lower water content and can be directly transported outwards; the other part is sewage generated by filter pressing, and the sewage can be recycled, so that the sewage can be reintroduced into the sedimentation tank 11 for subsequent process treatment.
After the sedimentation treatment is carried out in the sedimentation tank 11, the supernatant in the sedimentation tank 11 is led into the oxidation tank 2 for oxidation treatment, wherein the oxidation tank 2 can adopt an ozone oxidation tank 2 to decompose pollutants in the supernatant by ozone oxidation.
The concentrated water after oxidation treatment in the oxidation pond 2 is discharged into the activated carbon biological filter 3 for adsorption filtration treatment, and SS, CODcr and BOD5 in the concentrated water can be removed by the activated carbon biological filter 3.
The activated carbon biological filter 3 is a modified form of the biological aerated filter, and can also be regarded as a special form of a biological contact oxidation method, namely, activated carbon filler with high specific surface area is filled in a bioreactor to serve as a carrier for microbial film growth, the activated carbon filler is divided into downward flow and upward flow according to different sewage flow directions, a sewage flow filtering layer, organic matters and the surface organisms of the filler carry out living reaction, and the filler simultaneously plays a physical filtering role.
The sewage obtained after the treatment of the activated carbon biological filter 3 is discharged into a sand filter device 4 for treatment, and the sand filter can adopt the prior sand filter tank or sand filter in the embodiment; when sewage passes through the quartz sand bed in the sand filter device 4, suspended particles and colloid in the sewage are trapped on the surface and in the inner gaps of the filter material, so that suspended impurities are effectively removed to clarify water. The inlet water turbidity is less than 20 deg. and the outlet water turbidity can reach below 3 deg..
The sewage after the sand filtration treatment of the sand filtration device 4 is discharged into an ultrafiltration device 5 for ultrafiltration treatment, the ultrafiltration is a membrane separation technology taking pressure difference as driving force, the average pore diameter is between a reverse osmosis membrane and a microporous filter membrane, particles such as bacteria, viruses, colloids and macromolecules in the water are intercepted, and water and low molecular weight solutes permeate the membrane; the existing ultrafiltration device 5 generally comprises an ultrafiltration body, an ultrafiltration backwashing pump, a CEB dosing device and an air supply system, and the existing ultrafiltration device 5 can be adopted for ultrafiltration in the embodiment.
The ultrafiltration produced water is discharged into a nanofiltration device 6 for nanofiltration after ultrafiltration, the ultrafiltration produced water is further filtered by the nanofiltration device 6, the nanofiltration device 6 generally has two output ends, one of which is a clear water output end to output clear water, and the clear water refers to the filtrate produced after nanofiltration; the other is a concentrated water output end to output concentrated water, wherein the concentrated water refers to filter residue formed by nanofiltration treatment.
The clear water output end of the nanofiltration device 6 is connected with the evaporative crystallization system 7, so that clear water generated by the nanofiltration device 6 is input into the evaporative crystallization system 7, evaporative crystallization is carried out through the evaporative crystallization system 7, crystal salt in water is separated out, pure water is formed, the water is finally recovered, and the separated crystal salt can be recovered and transported out.
The concentrated water output end of the nanofiltration device 6 is connected with the water inlet end of the ozone catalytic tower 8, the water outlet end of the ozone catalytic tower 8 is connected with the water inlet end of the pretreatment unit 1, and the water outlet end of the ozone catalytic tower 8 is connected with the sedimentation tank 11, so that the water after catalytic treatment is led back to the sedimentation tank 11 for secondary treatment.
The concentrated water generated by nanofiltration passes through the ozone catalytic tower 8 to be subjected to ozone catalytic oxidation, and the oxidized concentrated water is discharged into the sedimentation tank 11 again to be subjected to recovery treatment, so that the recovery amount of water is increased.
In this embodiment, as shown in fig. 2, the ozone catalytic tower 8 includes a tower body 81 and a catalyst packing layer 82 provided in the tower body 81;
the upper part of the tower body 81 is provided with a water inlet 83 connected with the concentrated water output end of the nanofiltration device 6, the tower body 81 is internally provided with a spray pipe 85 which is communicated with the water inlet 83 and sprays water to one side of the catalyst packing layer 82, and the concentrated water generated by nanofiltration is guided into the spray pipe 85 through the water inlet 83 and downwards sprayed to the catalyst packing layer 82 through the spray pipe 85.
The lower part of the tower body 81 is provided with a water outlet 84, wherein the water outlet 84 is connected with the water inlet end of the pretreatment unit 1, the water outlet 84 is connected to the sedimentation tank 11 through a pipeline, and the sewage after oxidation in the concentrated water re-catalytic oxidation tower is discharged into the sedimentation tank 11 through the water outlet 84 for further treatment.
An air inlet 86 for ozone to enter is arranged at the lower part of the tower body 81, an air inlet pipe 87 communicated with the air inlet 86 is arranged in the tower body 81, and an aeration disc 88 for aerating to one side of the catalyst filler layer 82 is arranged at the end part of the air inlet pipe 87. Thus, the air inlet 86 is connected with an ozone generator (not shown in the figure), ozone is generated by the ozone generator, the ozone is introduced into the air inlet pipe 87, finally the ozone is uniformly sprayed upwards by the aeration disc 88, the top of the tower body 81 is provided with an air outlet 89, and tail gas is discharged through the air outlet 89.
It is worth mentioning that the catalyst packing layer 82 is located between the aeration disc 88 and the spray pipe 85, so that the ozone and the water sprayed by the spray pipe 85 form convection, and the ozone can oxidize the sewage through the catalytic action of the catalyst packing layer 82, in this embodiment, the catalyst packing layer 82 can be an alumina-based ozone catalyst.
Above only the typical example of the utility model discloses, in addition, the utility model discloses can also have other multiple concrete implementation manners, all adopt the technical scheme that equivalent replacement or equivalent transform formed, all fall in the utility model discloses the scope of claiming.
Claims (6)
1. A reverse osmosis concentrated water recovery device is characterized by comprising a pretreatment unit, an oxidation tank, an active carbon biological filter, a sand filtration device, an ultrafiltration device, a nanofiltration device and an evaporative crystallization system which are sequentially connected, wherein the recovery device also comprises an ozone catalytic tower; the clear water output end of the nanofiltration device is connected with the evaporative crystallization system and used for inputting clear water generated by the nanofiltration device into the evaporative crystallization system, the concentrated water output end of the nanofiltration device is connected with the water inlet end of the ozone catalytic tower, and the water outlet end of the ozone catalytic tower is connected with the water inlet end of the pretreatment unit.
2. A reverse osmosis concentrated water recovery device according to claim 1, wherein the pretreatment unit comprises a sedimentation tank connected to the oxidation tank, a sludge tank, and a filter press; wherein the sludge tank is used for receiving sludge generated by sedimentation in the sedimentation tank, the filter press is used for filter-pressing the sludge in the sludge tank, and the sewage discharge end of the filter press is connected with the sedimentation tank.
3. A reverse osmosis concentrated water recovery device according to claim 1 or 2, wherein the ozone catalytic tower comprises a tower body and a catalyst packing layer arranged in the tower body;
the upper part of the tower body is provided with a water inlet connected with the concentrated water output end of the nanofiltration device; the lower part of the tower body is provided with a water outlet, wherein the water outlet is connected with the water inlet end of the pretreatment unit; a spray pipe which is communicated with the water inlet and sprays water to one side of the catalyst packing layer is arranged in the tower body; the spray pipe is positioned above the catalyst packing layer;
the lower part of the tower body is provided with an air inlet for ozone to enter, wherein the air inlet is positioned at the lower part of the catalyst packing layer; and an exhaust port is arranged at the top of the tower body.
4. A reverse osmosis concentrated water recovery device according to claim 3, wherein an air inlet pipe communicated with the air inlet is arranged in the tower body, and an aeration disc for aerating to one side of the catalyst packing layer is arranged at the end part of the air inlet pipe.
5. A reverse osmosis concentrate recovery device according to claim 1, wherein the sand filtration device is a sand filtration tank or a sand filter.
6. A reverse osmosis concentrated water recovery device according to claim 1, wherein the evaporative crystallization system is a triple effect evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120805187.8U CN215161949U (en) | 2021-04-19 | 2021-04-19 | Reverse osmosis concentrated water recovery device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120805187.8U CN215161949U (en) | 2021-04-19 | 2021-04-19 | Reverse osmosis concentrated water recovery device |
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| CN215161949U true CN215161949U (en) | 2021-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114377503A (en) * | 2022-01-10 | 2022-04-22 | 杭州杭氧低温液化设备有限公司 | Water purification air separation tower with cooling device |
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2021
- 2021-04-19 CN CN202120805187.8U patent/CN215161949U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114377503A (en) * | 2022-01-10 | 2022-04-22 | 杭州杭氧低温液化设备有限公司 | Water purification air separation tower with cooling device |
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