CN214192908U - Wastewater treatment system for reducing evaporation capacity of wastewater - Google Patents
Wastewater treatment system for reducing evaporation capacity of wastewater Download PDFInfo
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- CN214192908U CN214192908U CN202022720332.0U CN202022720332U CN214192908U CN 214192908 U CN214192908 U CN 214192908U CN 202022720332 U CN202022720332 U CN 202022720332U CN 214192908 U CN214192908 U CN 214192908U
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Abstract
The utility model discloses a effluent disposal system for reducing waste water evaporation capacity, including mechanical filter portion (1), ultrafiltration portion (3), low pressure reverse osmosis portion (5), high pressure reverse osmosis portion (6) and evaporation crystallization portion (7) that loop through the pipe connection, ultrafiltration portion (3) including ultrafiltration device (31) and ultrafiltration water tank (32), low pressure reverse osmosis portion (5) including water inlet (53), one-level low pressure reverse osmosis unit (51) and second grade low pressure reverse osmosis unit (52), low pressure reverse osmosis produce water tank (54) and low pressure reverse osmosis thick water tank (55), high pressure reverse osmosis portion (6) including third inlet (61), high pressure reverse osmosis unit (62), third product mouth (63) and third thick water export (64). The utility model discloses effectively increase the rate of reuse of waste water, reduce the water content in the reverse osmosis dense water, reduced the waste water evaporation capacity, reduced the energy consumption.
Description
Technical Field
The utility model relates to a waste water treatment technical field, concretely relates to a waste water treatment system for reducing waste water evaporation capacity.
Background
The reverse osmosis water treatment technology has the advantages of high desalination rate, simple operation and small environmental pollution, and is widely applied to the advanced treatment of water. The concentrated water generated after the reverse osmosis technology treatment is sent to an evaporation system for desalination treatment, and in the evaporation system, because the reverse osmosis concentrated water still has higher water content, the energy consumption required by the reverse osmosis concentrated water for the evaporation treatment is still huge, and a large amount of water resources are evaporated and cannot be recycled, so that a large amount of resources are wasted.
Application number is CN 201420446218.5's utility model discloses a multistage formula high concentration reuse of reclaimed water equipment, including the raw water conveyor who has raw water pump and pipeline, still including linking to each other with raw water pump in proper order, and two sections at least reverse osmosis membrane devices of establishing ties each other, reverse osmosis membrane device includes concentrate export and permeate liquid export, upper segment reverse osmosis membrane device's concentrate is as adjacent hypomere reverse osmosis unit's raw water, at least one reverse osmosis membrane device self concentrate export and self import or be linked together with arbitrary last reverse osmosis membrane device's import, final section reverse osmosis membrane device's concentrate export intercommunication multiple-effect evaporation plant or drainage pipe. The utility model discloses a reuse of reclaimed water equipment is different from the tradition, adopts the reverse osmosis membrane device of more than one series connection each other, flows back a certain amount of concentrate moreover, and the cyclic treatment reaches high-efficient concentrated effect. The recovery rate of the whole equipment to the wastewater is greatly improved, and the backflow of the concentrated solution can increase the cross flow in front of the membrane, thereby reducing the pollution and blockage of the membrane. However, in the actual operation process, the reuse rate of the wastewater of the reverse osmosis wastewater treatment device combined with the secondary reverse osmosis device is 65-75%, and water generated after the filtration of the secondary reverse osmosis device is directly introduced into the multi-effect evaporator, so that a large amount of water cannot be reused and is directly evaporated, and a large amount of water resources and energy resources are still wasted.
In conclusion, how to further concentrate the reverse osmosis concentrated water, increase the water yield of wastewater treatment, reduce the water evaporation amount during the evaporation treatment of the reverse osmosis concentrated water, and reduce the evaporation energy consumption is a problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the technical problem, providing the rate of reuse that can effectively increase waste water, reduce a waste water treatment system for reducing waste water evaporation capacity of the water content in the reverse osmosis dense water.
In order to realize the purpose, the utility model adopts the technical scheme as follows:
a wastewater treatment system for reducing the evaporation capacity of wastewater comprises a mechanical filtration part, an ultrafiltration part, a low-pressure reverse osmosis part, a high-pressure reverse osmosis part and an evaporative crystallization part which are sequentially connected through pipelines;
the ultrafiltration part comprises an ultrafiltration device and an ultrafiltration water tank arranged between the ultrafiltration device and the low-pressure reverse osmosis part, and a first pressure pump is arranged between the ultrafiltration water tank and the low-pressure reverse osmosis part;
the low-pressure reverse osmosis part comprises a water inlet, a first-stage low-pressure reverse osmosis device and a second-stage low-pressure reverse osmosis device which are connected in series, a low-pressure reverse osmosis water production tank and a low-pressure reverse osmosis concentrated water tank; the low-pressure reverse osmosis concentrated water tank is connected with the high-pressure reverse osmosis part through a pipeline;
the high-pressure reverse osmosis part comprises a third water inlet, a high-pressure reverse osmosis device, a third water production port and a third concentrated water outlet, and the third water production port is connected with the ultrafiltration water tank through a pipeline.
The utility model discloses evaporation capacity when using reduction waste water evaporation treatment is main purpose, provides a waste water treatment system for reducing waste water evaporation capacity, including mechanical filter portion, ultrafiltration portion, low pressure reverse osmosis portion, high pressure reverse osmosis portion and the evaporation crystallization portion that loops through the pipe connection. Firstly, the mechanical filtering part is used for filtering the wastewater to remove large-particle pollutants and impurities; then, suspended matters, colloid, particles, bacteria and virus macromolecular substances in the wastewater are prevented from being polluted, blocked and scaled by a reverse osmosis membrane in the low-pressure reverse osmosis part through the ultrafiltration part; and then the wastewater is subjected to first-stage desalting and second-stage desalting through the filtration treatment of the low-pressure reverse osmosis part, and then is pumped into the high-pressure reverse osmosis part through a high-pressure pump, and is further concentrated and then is sent into the evaporative crystallization part for treatment.
Preferably, the mechanical filter part comprises a coarse filter, an activated carbon filter and a precise filter; and a bactericide dosing device is arranged between the activated carbon filter and the precision filter.
Preferably, the primary low-pressure reverse osmosis device comprises a plurality of first low-pressure reverse osmosis modules which are connected in parallel and connected through a pipeline, a plurality of first water inlets, a first water producing port and a first concentrated water outlet which are respectively arranged on the first low-pressure reverse osmosis modules, wherein the first water inlets are connected with the water inlets, and the first water producing port is connected with the low-pressure reverse osmosis water producing tank; the second-stage low-pressure reverse osmosis device comprises a plurality of second low-pressure reverse osmosis components which are connected in parallel and are connected through pipelines, and a second water inlet, a second water production port and a second concentrated water outlet which are respectively arranged on the second low-pressure reverse osmosis components, wherein the second water inlet is connected with the first concentrated water outlet, the second water production port is connected with the low-pressure reverse osmosis water production tank, and the second concentrated water outlet is connected with the low-pressure reverse osmosis concentrated water tank.
Preferably, the reverse osmosis membrane element adopted by the low-pressure reverse osmosis part comprises one or more of a nanofiltration membrane, a loose reverse osmosis membrane or a seawater desalination reverse osmosis membrane.
Preferably, a scale inhibitor dosing device for dosing scale inhibitor is arranged between the ultrafiltration device and the ultrafiltration water tank.
Preferably, the reverse osmosis membrane element adopted by the high-pressure reverse osmosis device comprises one or more of a disc tube type reverse osmosis membrane, an open channel reverse osmosis membrane or a sea water desalination reverse osmosis membrane.
Preferably, the aperture of the ultrafiltration membrane of the ultrafiltration device is 0.05 μm-1 nm.
Preferably, an ultrafiltration pressurization pump is arranged between the mechanical filtering part and the ultrafiltration device.
The utility model discloses the beneficial effect who produces includes:
1. the utility model relates to a effluent disposal system for reducing waste water evaporation capacity cooperatees mutually through low pressure reverse osmosis portion and high pressure reverse osmosis and handles waste water, and the concentrated dense water that finally produces contains salt content height, moisture content low to reduce the load of evaporative concentration system, practiced thrift the running cost.
2. Low pressure reverse osmosis portion do not need too big osmotic pressure difference can realize having reduced the energy consumption to the reverse osmosis treatment of waste water, reduced reverse osmosis treatment's the degree of difficulty, high pressure reverse osmosis portion effectual carry out further concentration to the dense water of reverse osmosis, improved the rate of recovery of the water in the waste water, reduced the evaporation capacity of waste water when evaporation crystallization portion is handled, reduced the energy consumption when evaporating when having increased the recycle ratio of resource.
3. The setting of mechanical filter portion and ultrafiltration portion, got rid of the material of the large granule waste material and macromolecule in the waste water, effectively controlled scaling ion, bacterium, alga in the dense water to reverse osmosis membrane's harmful effects, alleviateed the dirt of reverse osmosis membrane element stifled, the scale deposit, prolonged the life of two-stage segment reverse osmosis membrane element.
Drawings
FIG. 1 is a schematic view of a wastewater treatment system for reducing the evaporation of wastewater;
wherein, 1 is a mechanical filtering part, 11 is a coarse filter, 12 is an activated carbon filter, 13 is a precise filter, and 14 is a bactericide adding device; 2 is an ultrafiltration pressure pump; 3, an ultrafiltration part, 31, 32, an ultrafiltration water tank and 33, a scale inhibitor dosing device; 4 is a first pressure pump; 5 is a low-pressure reverse osmosis part, 51 is a first-stage low-pressure reverse osmosis device, 514 is a first low-pressure reverse osmosis component, 511 is a first water inlet, 512 is a first water producing port, 513 is a first concentrated water outlet, 52 is a second-stage low-pressure reverse osmosis device, 521 is a second water inlet, 522 is a second water producing port, 523 is a second concentrated water outlet, 524 is a second low-pressure reverse osmosis component, 53 is a water inlet, 54 is a low-pressure reverse osmosis water producing tank, and 55 is a low-pressure reverse osmosis concentrated water tank; 6 is a high-pressure reverse osmosis part, 61 is a third water inlet, 62 is a high-pressure reverse osmosis device, 63 is a third water producing port, and 64 is a third concentrated water outlet; and 7 is an evaporative crystallization part.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
Furthermore, the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
A wastewater treatment system for reducing the evaporation capacity of wastewater comprises a mechanical filtration part 1, an ultrafiltration part 3, a low-pressure reverse osmosis part 5, a high-pressure reverse osmosis part 6 and an evaporative crystallization part 7 which are connected in sequence through pipelines;
the ultrafiltration part 3 comprises an ultrafiltration device 31 and an ultrafiltration water tank 32 arranged between the ultrafiltration device 31 and the low-pressure reverse osmosis part 5, and a first pressure pump 4 is arranged between the ultrafiltration water tank 32 and the low-pressure reverse osmosis part 5;
the low-pressure reverse osmosis part 5 comprises a water inlet 53, a first-stage low-pressure reverse osmosis device 51 and a second-stage low-pressure reverse osmosis device 52 which are connected in series, a low-pressure reverse osmosis water production tank 54 and a low-pressure reverse osmosis concentrated water tank 55; the low-pressure reverse osmosis concentrated water tank 55 is connected with the high-pressure reverse osmosis part 6 through a pipeline;
the high-pressure reverse osmosis part 6 comprises a third water inlet 61, a high-pressure reverse osmosis device 62, a third water producing port 63 and a third concentrated water outlet 64, wherein the third water producing port 63 is connected with the ultrafiltration water tank 32 through a pipeline.
The mechanical filter part 1 comprises a coarse filter 11, an active carbon filter 12 and a precise filter 13; and a bactericide dosing device 14 is arranged between the activated carbon filter 12 and the precision filter 13.
The primary low-pressure reverse osmosis device 51 comprises a plurality of first low-pressure reverse osmosis components 514 which are connected in parallel through pipelines, a plurality of first water inlets 511, a first water producing port 512 and a first concentrated water outlet 513 which are respectively arranged on the first low-pressure reverse osmosis components 514, wherein the first water inlets 511 are connected with the water inlets, and the first water producing port 512 is connected with the low-pressure reverse osmosis water producing tank 54; the second-stage low-pressure reverse osmosis device comprises a plurality of second low-pressure reverse osmosis components 524 which are connected in parallel through pipelines, and a second water inlet 521, a second water producing opening 522 and a second concentrated water outlet 523 which are respectively arranged on the second low-pressure reverse osmosis components 524, wherein the second water inlet 521 is connected with the first concentrated water outlet 513, the second water producing opening 522 is connected with the low-pressure reverse osmosis water producing tank 54, and the second concentrated water outlet 523 is connected with the low-pressure reverse osmosis water producing tank 54. The number ratio of the first low-pressure reverse osmosis component to the second low-pressure reverse osmosis component is 2: 1-3: 1.
The reverse osmosis membrane element that low pressure reverse osmosis portion 5 adopted includes one or more in receiving filter membrane, loose type reverse osmosis membrane or the sea water desalination reverse osmosis membrane, the embodiment of the utility model provides an it is not right reverse osmosis element type, technical staff in the art can select according to concrete production situation.
And a scale inhibitor dosing device 33 for dosing scale inhibitor is arranged between the ultrafiltration device 31 and the ultrafiltration water tank 32.
The reverse osmosis membrane elements used in the high pressure reverse osmosis unit 62 include one or more of a disk tube reverse osmosis membrane, an open channel reverse osmosis membrane, or a seawater desalination reverse osmosis membrane.
The aperture of the ultrafiltration membrane of the ultrafiltration device 31 is 0.05 mu m-1 nm, and the ultrafiltration membrane can intercept and remove macromolecular substances such as suspended matters, colloids, particles, bacteria, viruses and the like in water.
An ultrafiltration pressurizing pump 2 is arranged between the mechanical filtering part 1 and the ultrafiltration device 31.
A method of reducing the evaporation capacity of wastewater using the wastewater treatment system for reducing the evaporation capacity of wastewater, comprising the steps of:
s1: after large-particle substances in the wastewater are removed by the mechanical filtering part 1, the wastewater is pumped into the ultrafiltration device 31 by the ultrafiltration pressurization pump 2 to be treated so as to remove macromolecular substances such as suspended substances, colloids, particles, bacteria, viruses and the like in the wastewater; after being discharged from the ultrafiltration device 31, the wastewater is mixed with the scale inhibitor added in the scale inhibitor dosing device 33 and then is temporarily stored in the ultrafiltration water tank 32;
s2: the wastewater in the ultrafiltration water tank 32 enters a first-stage low-pressure reverse osmosis device from a water inlet under the driving of a first pressure pump 4, is respectively introduced into a plurality of first water inlets 511, is subjected to first-stage desalting in a plurality of first low-pressure reverse osmosis components 51, and flows into a reverse osmosis water tank through a pipeline after passing through a plurality of first water producing ports 512;
s3: the generated primary reverse osmosis concentrated water is pressurized and pumped into a plurality of second water inlets 521 through a first concentrated water outlet 513 and a second booster pump, enters a secondary low-pressure reverse osmosis device for secondary desalting, the produced water flows into the reverse osmosis water tank through a second water producing port 522 and a pipeline, and the generated secondary reverse osmosis concentrated water flows into the reverse osmosis concentrated water tank through a second concentrated water outlet 523 and a pipeline;
s4: the reverse osmosis concentrated water in the reverse osmosis concentrated water tank is sent into the high-pressure reverse osmosis device by the high-pressure pump for further concentration, the obtained produced water flows back to the ultrafiltration water tank 32 through a pipeline for desalting treatment again, and the obtained concentrated water enters the evaporative crystallization part 7 through a third concentrated water outlet 64 for evaporative crystallization treatment.
In order to prolong the service life of the equipment, when the ultrafiltration membrane component of the ultrafiltration part needs to be backwashed for maintenance, water in the ultrafiltration water tank 32 is extracted for flushing, and cleaning water generated after flushing can return to the mechanical filtration part 1 for retreatment. When the low-pressure reverse osmosis part is also backwashed for maintenance, the produced water in the low-pressure reverse osmosis water production tank 54 is extracted to carry out the backwashing maintenance on the low-pressure reverse osmosis part, and the cleaning water generated after the backwashing is returned to the ultrafiltration part 3 for retreatment. When the high-pressure reverse osmosis part is backwashed for maintenance, a flushing device is connected at the third water producing port 63, and the cleaning water generated after the backwashing returns to the low-pressure reverse osmosis part 5 for retreatment. The corresponding water produced by each device is adopted to carry out backwashing maintenance on the membrane element, so that the pressure difference of two sides of each membrane element is ensured not to change, the stability of system operation is kept, and the service life of the membrane element is prolonged.
In order to test the influence of the produced water with high salt content generated by the high-pressure reverse osmosis part 6 on the conductivity of the water in the ultrafiltration water tank 32 after the third water producing port 63 is communicated with the ultrafiltration water tank 32, a water conductivity meter is arranged in the ultrafiltration water tank 32 to respectively test the conductivity of the initial water in the ultrafiltration water tank 32, and the conductivity of the produced water introduced into the high-pressure reverse osmosis part 6 is increased by 2-4 us/cm, so that the influence on the conductivity of the water in the ultrafiltration water tank is very little and is in a controllable range.
Under the condition of the same wastewater treatment capacity of 2 m/h, according to 2000m ethanol, if wastewater is treated by the low-pressure reverse osmosis part 5, the wastewater stored in the low-pressure reverse osmosis concentrated water tank 55 is directly introduced into the evaporative crystallization part 7, at this time, the volume of the wastewater to be evaporated is 680m, and the reuse rate is 66%; the utility model discloses embodiment 1 finally lets in high pressure reverse osmosis dense water yield in the evaporation crystallization portion 7 is 340m dry crops, and the rate of reuse is 83%.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the invention is intended to cover all modifications, equivalents and improvements falling within the spirit and principles of the present invention.
Claims (8)
1. A wastewater treatment system for reducing the evaporation capacity of wastewater, characterized by: comprises a mechanical filtering part (1), an ultrafiltration part (3), a low-pressure reverse osmosis part (5), a high-pressure reverse osmosis part (6) and an evaporative crystallization part (7) which are connected in sequence through pipelines;
the ultrafiltration part (3) comprises an ultrafiltration device (31) and an ultrafiltration water tank (32) arranged between the ultrafiltration device (31) and the low-pressure reverse osmosis part (5), and a first pressure pump (4) is arranged between the ultrafiltration water tank (32) and the low-pressure reverse osmosis part (5);
the low-pressure reverse osmosis part (5) comprises a water inlet (53), a first-stage low-pressure reverse osmosis device (51) and a second-stage low-pressure reverse osmosis device (52) which are connected in series, a low-pressure reverse osmosis water production tank (54) and a low-pressure reverse osmosis concentrated water tank (55); the low-pressure reverse osmosis concentrated water tank (55) is connected with the high-pressure reverse osmosis part (6) through a pipeline;
the high-pressure reverse osmosis part (6) comprises a third water inlet (61), a high-pressure reverse osmosis device (62), a third water producing port (63) and a third concentrated water outlet (64), and the third water producing port (63) is connected with the ultrafiltration water tank (32) through a pipeline.
2. A wastewater treatment system for reducing the evaporation of wastewater according to claim 1, wherein: the mechanical filtering part (1) comprises a coarse filter (11), an activated carbon filter (12) and a precise filter (13); and a bactericide dosing device (14) is arranged between the activated carbon filter (12) and the precision filter (13).
3. A wastewater treatment system for reducing the evaporation of wastewater according to claim 1, wherein: the primary low-pressure reverse osmosis device (51) comprises a plurality of first low-pressure reverse osmosis components (514) which are connected in parallel through pipelines, a plurality of first water inlets (511), a first water producing port (512) and a first concentrated water outlet (513) which are respectively arranged on the first low-pressure reverse osmosis components (514), wherein the first water inlets (511) are connected with the water inlets, and the first water producing port (512) is connected with the low-pressure reverse osmosis water producing tank (54); the second-stage low-pressure reverse osmosis device comprises a plurality of second low-pressure reverse osmosis components (524) which are connected in parallel and are connected through pipelines, and a second water inlet (521), a second water production port (522) and a second concentrated water outlet (523) which are respectively arranged on the second low-pressure reverse osmosis components (524), wherein the second water inlet (521) is connected with the first concentrated water outlet (513), the second water production port (522) is connected with the low-pressure reverse osmosis water production tank (54), and the second concentrated water outlet (523) is connected with the low-pressure reverse osmosis concentrated water tank (55).
4. A wastewater treatment system for reducing the evaporation of wastewater according to claim 1, wherein: the reverse osmosis membrane element adopted by the low-pressure reverse osmosis part (5) comprises one or more of a nanofiltration membrane, a loose reverse osmosis membrane or a seawater desalination reverse osmosis membrane.
5. A wastewater treatment system for reducing the evaporation of wastewater according to claim 1, wherein: and a scale inhibitor dosing device (33) for dosing scale inhibitor is arranged between the ultrafiltration device (31) and the ultrafiltration water tank (32).
6. A wastewater treatment system for reducing the evaporation of wastewater according to claim 1, wherein: the reverse osmosis membrane elements adopted by the high-pressure reverse osmosis device (62) comprise one or more of a disc tube type reverse osmosis membrane, an open channel reverse osmosis membrane or a sea water desalination reverse osmosis membrane.
7. A wastewater treatment system for reducing the evaporation of wastewater according to claim 1, wherein: the aperture of the ultrafiltration membrane of the ultrafiltration device (31) is 0.05 mu m-1 nm.
8. A wastewater treatment system for reducing the evaporation of wastewater according to claim 1, wherein: an ultrafiltration booster pump (2) is arranged between the mechanical filtering part (1) and the ultrafiltration device (31).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022720332.0U CN214192908U (en) | 2020-11-23 | 2020-11-23 | Wastewater treatment system for reducing evaporation capacity of wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022720332.0U CN214192908U (en) | 2020-11-23 | 2020-11-23 | Wastewater treatment system for reducing evaporation capacity of wastewater |
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| CN214192908U true CN214192908U (en) | 2021-09-14 |
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| CN202022720332.0U Active CN214192908U (en) | 2020-11-23 | 2020-11-23 | Wastewater treatment system for reducing evaporation capacity of wastewater |
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