CN213651966U - Small-sized electrodialysis device for public toilet sewage zero discharge treatment - Google Patents
Small-sized electrodialysis device for public toilet sewage zero discharge treatment Download PDFInfo
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- CN213651966U CN213651966U CN202022419366.6U CN202022419366U CN213651966U CN 213651966 U CN213651966 U CN 213651966U CN 202022419366 U CN202022419366 U CN 202022419366U CN 213651966 U CN213651966 U CN 213651966U
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Abstract
The utility model relates to the technical field of sewage treatment, in particular to a small electrodialysis device for public toilet sewage zero discharge treatment, which is provided with a desalted liquid water tank and at least comprises an electrodialysis membrane stack, a concentrated liquid water tank and an electrode liquid water tank, wherein the electrodialysis membrane stack is provided with a circulating water inlet, a circulating water outlet, a concentrated liquid water inlet, a concentrated liquid water outlet, an electrode liquid water inlet and an electrode liquid water outlet, the circulating water inlet is communicated with a raw water outlet channel, and the circulating water outlet is communicated with a backflow inlet channel; the concentrated solution water tank is provided with a concentrated solution outlet communicated with the concentrated solution water inlet and a concentrated solution inlet communicated with the concentrated solution water outlet; the polar liquid water tank is provided with a polar liquid outlet communicated with the polar liquid water inlet and a polar liquid inlet communicated with the polar liquid water outlet. The reclaimed water after desalination treatment in the desalted liquid water tank can be recycled as toilet flushing water, and the concentrated solution can be dried in the sun to prepare salt, so that the zero discharge treatment of public toilet sewage is realized.
Description
Technical Field
The utility model relates to a sewage treatment technical field, concretely relates to small-size electrodialysis device is handled in public latrine zero release of sewage.
Background
In recent years, with the rapid development of national economy, more and more people choose to travel. The domestic, inbound and outbound tourism markets of China are in the top of the world in scale, and have already entered the tourism of the great country. The toilet is an essential basic facility for tourism, is also an important window for civilization, and is an important embodiment of the civilization degree of the country and the region.
Toilets are not a trivial undertaking in any way as a large tourist country with over 37 hundred million visitors serving a year. In order to really make the tourists feel relieved, comfortable and happy, and find beauty, enjoy beauty and spread beauty in the process of tourism, the problem of the toilet is solved firstly. To develop the tourism industry into a modern service industry which is more satisfied by people, the basic things like toilets need to be picked up when China is really built into a world tourism forcing country.
Because domestic water resources are deficient and water pollution is more and more serious, the sewage treatment system is widely applied. And the sewage treatment systems used for treating different sewages are different. So that it is necessary to design a corresponding sewage treatment system according to the characteristics of various sewages. At present, the existing sewage treatment system has poor treatment effect on public toilet sewage and is difficult to reach the discharge standard.
The toilet flushing sewage is more and more valued by people as the main component of domestic sewage. The traditional water flushing type toilet almost uses clean water, 6-10L of water is used each time, 2% of excrement is actually diluted by 98% of water, in other words, the 98% of water is polluted by 2% of excrement. If the toilet flushing sewage is not properly treated, the toilet flushing sewage is foul and smelly, but also causes a great deal of breeding of flies and insects, and the excrement is not harmless, so that the spread of intestinal infectious diseases and parasitic diseases is easily caused.
At present, the common public toilet sewage treatment processes at home and abroad mainly comprise anaerobic treatment, aerobic treatment, a chemical method and a high-temperature high-pressure treatment method (a wet oxidation method). Through construction for many years, tourism public service facilities in China are greatly improved, but the public service facilities have a large gap with the requirements of tourists and international tourism standards. The problems of the travel toilet are also prominent. The treatment of the toilet wastewater still adopts the traditional process, occupies large area and has bad taste.
Therefore, the requirements of people on increasingly improved living standard and economic development can be met only by breaking through the limitation of the traditional flushing type toilet, developing circulating water to flush the ecological toilet and realizing source treatment and recycling of flushing sewage. In order to realize the recycling of the water resource with the zero-emission concept, the problem that the salt which is infinitely and circularly enriched in the wastewater treatment process cannot be removed needs to be solved, the enriched salt is not removed, the biochemical treatment effect of the wastewater is increasingly poor, and finally the reuse water still cannot reach the standard. Therefore, the problem of the enrichment of salt in the sewage treatment of the public toilet, namely the removal of the salt in the effluent of biochemical treatment, is a crucial problem.
The main processes for desalting the salt-containing water at present include Reverse Osmosis (RO) technology, tubular reverse osmosis (DTRO) technology, Forward Osmosis (FO) technology and the like besides Electrodialysis (ED) technology.
Reverse Osmosis (RO) is a membrane separation operation that separates a solvent from a solution using a pressure differential as a driving force. Reverse osmosis is known because it is in the opposite direction to natural osmosis. According to different osmotic pressures of various materials, a reverse osmosis pressure which is larger than the osmotic pressure, namely a reverse osmosis method, can be used for achieving the purposes of separation, extraction, purification and concentration. The biggest problems of reverse osmosis are that various inorganic matters and organic matters are easy to block and scale in later operation, and the concentration backwashing and chemical cleaning of the filter and the membrane separation are frequent. A large amount of acid or scale inhibitor and other medicines are required to be added, the using amount of the medicines is large, the later-stage manual operation and maintenance are complicated, the operation cost is high, the final concentration rate is not high, and the recovery rate is low.
The tubular-type reverse osmosis technology (DTRO) is a new reverse osmosis desalination technology developed on the basis of the traditional reverse osmosis technology, although the recovery rate of the traditional reverse osmosis is improved. As with the traditional reverse osmosis technology, the problems of dirt blockage and scaling of various inorganic matters and organic matters are easy to occur, the complex operation of frequent backwashing is very difficult to clean, and the maintenance cost of equipment is high.
Forward Osmosis (FO) technology is the process by which water flows from a higher water chemical potential (or lower osmotic pressure) side region through a permselective membrane to a lower water chemical potential (or higher osmotic pressure) -side region. Two solutions with different osmotic pressures are respectively placed on two sides of the membrane with selective permeability, one is raw material solution (Feed solution) with lower osmotic pressure, and the other is driving solution (Draw solution) with higher osmotic pressure, and forward osmosis uses the osmotic pressure difference of the solutions on two sides of the membrane as driving force, so that water can spontaneously permeate through the membrane with selective permeability from one side of the raw material solution to the driving solution-side. The forward osmosis is a new technology developed in recent years, no mature application case exists, the necessary draw solution in the forward osmosis technology is expensive, the later operation and maintenance cost is high, the forward osmosis technology is complex, and the requirement on the quality of operators is high. Forward osmosis is a new technology, is not mature, has serious concentration polarization phenomenon in the forward osmosis process, has low forward osmosis flux at present, and has weak pollution resistance of forward osmosis membranes. The draw solution is expensive, and the later operation and maintenance cost is high.
The Reverse Osmosis (RO) and the tubular reverse osmosis (DTRO) in the existing desalination technology have similar defects and problems, the problems of pollution blockage and scaling of various inorganic matters and organic matters are easy to occur in later operation, concentration backwashing and chemical cleaning of a filter and a membrane are frequent, a large amount of medicines such as acid or scale inhibitor and the like are required to be added, and the using amount of the medicines is large. The later-stage manual operation and maintenance are complicated, and the operation cost is high. And the final concentration rate is not high, and the recovery rate is low.
Disclosure of Invention
The to-be-solved technical problem of the utility model is how to solve the zero release and cyclic utilization behind the public latrine sewage treatment.
In order to solve the technical problem, the utility model provides a technical scheme as follows: the utility model provides a small-size electrodialysis device of public latrine zero release treatment, disposes the desalination liquid water tank, the desalination liquid water tank is provided with raw water inhalant canal, normal water exhalant canal, raw water exhalant canal and backward flow inhalant canal, small-size electrodialysis device includes at least:
the electrodialysis membrane stack is provided with a circulating water inlet, a circulating water outlet, a concentrated solution water inlet, a concentrated solution water outlet, an electrode solution water inlet and an electrode solution water outlet, the circulating water inlet is communicated with the raw water outlet channel, and the circulating water outlet is communicated with the backflow water inlet channel;
the concentrated solution water tank is provided with a concentrated solution outlet communicated with the concentrated solution water inlet and a concentrated solution inlet communicated with the concentrated solution water outlet; and
the polar liquid water tank is provided with a polar liquid outlet communicated with the polar liquid water inlet and a polar liquid inlet communicated with the polar liquid water outlet.
In a preferred embodiment, a precision filter is arranged between the circulating water inlet and the raw water outlet channel.
In a preferred embodiment, a desalination liquid circulating pump is arranged between the circulating water inlet and the raw water outlet channel.
In a preferred embodiment, a concentrate circulating pump is disposed between the concentrate inlet and the concentrate outlet.
In a preferred embodiment, an electrode liquid circulating pump is arranged between the electrode liquid inlet and the electrode liquid outlet.
In a preferred embodiment, the concentrate water tank is further provided with a concentrate discharge outlet, and the concentrate discharge outlet is provided with a concentrate discharge pump.
In a preferred embodiment, the concentrate tank is provided with a low level monitoring device, a high level monitoring device and an ultra high level monitoring device.
In a preferred embodiment, the pipeline between the electrodialysis membrane stack and the desalted liquid water tank is provided with a flow monitoring device.
A preferred embodiment further comprises a control/power cabinet.
The small electrodialysis device for the public toilet sewage zero discharge treatment is used for desalting raw water after the public toilet sewage is subjected to biochemical filtration treatment, wherein the raw water enters an electrodialysis membrane stack from a desalination liquid water tank, and desalination liquid effluent of the electrodialysis membrane stack circulates back to the desalination liquid water tank to form a first cycle of desalination liquid; concentrated solution enters the electrodialysis membrane stack from the concentrated solution water tank, and concentrated solution outlet water of the electrodialysis membrane stack circulates back to the concentrated solution water tank to form a second concentrated solution circulation; the polar liquid enters the electrodialysis membrane stack from the polar liquid water tank, polar liquid outlet water of the electrodialysis membrane stack circulates back to the polar liquid water tank, and salt in the raw water can be removed after repeated circulating treatment in the three circulating processes.
In the embodiment, the reclaimed water subjected to desalination treatment in the desalted liquid water tank can be recycled as toilet flushing water, and the concentrated solution can be dried in the sun to prepare salt, so that zero discharge treatment of public toilet sewage is realized.
The small-size electrodialysis device of public latrine sewage zero release treatment of this embodiment, beneficial effect lies in:
(1) adopt miniature electrodialysis device to handle the salt-containing sewage after the biochemical filtration treatment of public latrine sewage, get rid of the salinity of enrichment in the sewage, solved the problem that the biochemical effect that cyclic utilization in-process salinity enrichment caused reduces.
(2) The electrodialysis desalination concentration process is driven by an electric field, the water inlet requirement is relatively low, the pretreatment process is simple, the service life of the membrane can reach more than 5 years under the condition of ensuring the water inlet, and meanwhile, the membrane can be disassembled for off-line cleaning, so that the service life is long.
(3) Compared with the common desalination technology, the electrodialysis desalination can avoid or reduce the addition of acid or scale inhibitor and other medicines into the wastewater, reduce the later operation and maintenance cost, and is a novel environment-friendly water treatment technology.
(4) The whole system for electrodialysis desalination is automatically controlled, manual intervention is basically not needed, and personnel operation is simpler and more convenient.
Drawings
FIG. 1 is a schematic structural diagram of a small electrodialysis device for zero discharge treatment of public toilet sewage in the embodiment;
FIG. 2 is a schematic sectional view A-A of the small electrodialysis device for zero discharge treatment of public toilet sewage shown in FIG. 1;
fig. 3 is a schematic sectional structural view of the B-B cross section of the small electrodialysis device for zero discharge treatment of public toilet sewage shown in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, an integral connection, or a detachable connection; may be communication within two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention in specific situations.
The small electrodialysis device for the public toilet sewage zero discharge treatment is used for desalting raw water after pretreatment, biochemical treatment and filtration treatment. The pretreatment unit, the biochemical treatment unit and the filtration treatment unit are all the existing mature technologies, and do not belong to the invention of the application, so the detailed description is not provided herein. The turbidity of the raw water introduced into the small electrodialysis apparatus of this example was required to be less than 1NTU and stored in the desalted water tank. The desalting liquid water tank is provided with a raw water inlet channel, a reclaimed water outlet channel, a raw water outlet channel and a return water inlet channel, and raw water after pretreatment, biochemical treatment and filtration treatment enters the desalting liquid water tank from the raw water inlet channel for storage.
The small-sized electrodialysis device of the present embodiment, as shown in fig. 1 to 3, includes an electrodialysis membrane stack 10, a concentrate tank 20, an electrode liquid tank 30, and a control/power supply cabinet 40.
In this embodiment, the electrodialysis membrane stack 10 is provided with anion and cation exchange membranes arranged in a staggered manner, and separators are disposed between the membranes, so that tens of chambers are formed. Anion exchange membranes allow only anions to pass through while retaining cations, and cation exchange membranes allow only cations to pass through while retaining anions. Since the electrodialysis membrane stack belongs to the prior art, the specific structure thereof will not be described in detail in this embodiment.
In this embodiment, the concentrate tank 20 is initially replenished with a suitable amount of raw water as an initial concentrate. The sodium nitrate solution with the mass concentration of 3% is configured in the polar liquid water tank 30 to be used as the cathode and anode common polar liquid.
In this embodiment, the electrodialysis membrane stack 10 is provided with a circulation water inlet communicated with the raw water outlet channel of the desalination liquid water tank and a circulation water outlet communicated with the return water inlet channel of the desalination liquid water tank. After the system is started by the control/power supply cabinet 40, the desalination liquid circulating pump 61 lifts the raw water in the desalination liquid tank from the raw water outlet channel to the circulating water inlet, and the circulating outlet water of the electrodialysis membrane stack flows back to the desalination liquid tank from the circulating water outlet, so that a first circulating process is formed between the electrodialysis membrane stack 10 and the desalination liquid tank.
Preferably, in the present embodiment, a precision filter 50 is disposed between the circulation water inlet of the electrodialysis membrane stack 10 and the raw water outlet channel of the desalted water tank, and the raw water firstly passes through the precision filter 50 and then enters the electrodialysis membrane stack 10.
In this embodiment, the electrodialysis membrane stack 10 is further provided with a concentrate water inlet and a concentrate water outlet, and correspondingly, the concentrate water tank 20 is provided with a concentrate liquid outlet communicated with the concentrate water inlet and a concentrate liquid inlet communicated with the concentrate water outlet. The concentrated solution circulating pump 62 lifts the concentrated solution in the concentrated solution water tank 20 from the concentrated solution outlet to the concentrated solution inlet of the electrodialysis membrane stack 10, and the concentrated solution outlet of the electrodialysis membrane stack 10 flows back to the concentrated solution water tank 20 from the concentrated solution outlet, so that a second circulating process is formed between the electrodialysis membrane stack 10 and the concentrated solution water tank 20.
In this embodiment, the electrodialysis membrane stack 10 is further provided with a polar liquid water inlet and a polar liquid water outlet, and correspondingly, the polar liquid water tank 30 is provided with a polar liquid outlet communicated with the polar liquid water inlet and a polar liquid inlet communicated with the polar liquid water outlet. The polar liquid circulating pump 63 lifts the polar liquid from the polar liquid outlet of the polar liquid water tank 30 to the polar liquid inlet of the electrodialysis membrane stack 10, and the polar liquid outlet of the electrodialysis membrane stack 10 flows back from the polar liquid outlet to the polar liquid inlet of the polar liquid water tank 30, so that a third circulating process is formed between the electrodialysis membrane stack 10 and the polar liquid water tank 30.
In this embodiment, after the dc power of the control/power supply cabinet 40 is output and connected to the electrodialysis membrane stack 10, the anion and cation salt ions in the desalted liquid in the first cycle migrate to the concentrated liquid side in the second cycle respectively under the action of the dc power. In the process of repeated circulation treatment, salt in raw water is removed, and the desalted reclaimed water can be recycled as flushing water of a toilet for recycling.
In this embodiment, the concentrated liquid water tank 20 is further provided with a concentrated liquid discharge port, and the concentrated liquid discharge port is provided with a concentrated liquid discharge pump 64.
In this embodiment, the concentrated solution tank 20 is provided with a low liquid level monitoring device, a high liquid level monitoring device, and an ultrahigh liquid level monitoring device. Preferably, in this embodiment, the liquid level monitoring device employs a liquid level switch. When the high liquid level monitoring device monitors that the concentrated solution in the concentrated solution water tank 20 rises to a high liquid level, the concentrated solution discharge pump 64 is started to start discharging the concentrated solution, and the concentrated solution is discharged to the concentrated brine airing pool and evaporated to dryness for salt making. When the low level monitoring device detects that the concentrate level drops to a low level, the concentrate discharge pump 64 stops. And if the ultrahigh liquid level monitoring device monitors that the liquid level of the concentrated solution continuously rises to the ultrahigh liquid level, the small electrodialysis device displays the ultrahigh liquid level and alarms to integrally stop.
In this embodiment, a flow monitoring device is arranged in a pipeline between the electrodialysis membrane stack and the desalted liquid water tank. Preferably, the flow monitoring device adopts an area type flowmeter and is matched with a magnetic flow switch, and in the circulating desalting process, when the floater of the area type flowmeter does not reach the set flow, the electrodialysis device displays that the circulating flow of the desalting solution is low and alarms and integrally stops.
The small electrodialysis device for zero discharge treatment of public toilet sewage in the embodiment is intended to be applied to zero discharge treatment engineering of public toilets in certain places, and is configured in detail as follows:
1) electrodialysis skid-mounted type: JRDCH-0-20 type electrodialysis skid-mounted device
Model of electrodialysis membrane stack: CH-0 type
Number of embedded film pairs: 20 pairs of
Anion exchange membrane: AMV (Standard homogeneous film)
Cation exchange membrane: CMV (Standard homogeneous Membrane)
The size of the membrane is as follows: 160mm by 280mm
Effective area of monolithic film: 0.021m2
Total effective area: 0.84m2
The anode plate is made of: iridium-plated titanium plate
The cathode plate is made of: SUS316
A rectifier: DC30V X10A
2) Water pump specification
Circulating pump: 3 stands by 1m3Per, concentrate, fresh, and very Water circulation
An efflux pump: 1 st, 1m3Delivery of concentrated water
3) Water tank
Capacity: 68L of concentrated solution water tank and 35L of polar liquid water tank
The material is as follows: PP (polypropylene)
4) Skid-mounted frame
Size: 1200mm in length, 400mm in width and 1600mm in height
The material is as follows: 304 stainless steel
Interface: a raw water inlet pipe orifice DN15, a desalted liquid return pipe orifice DN15, a concentrated liquid discharge pipe orifice DN15 and a system emptying pipe orifice DN 15.
In summary, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (9)
1. The utility model provides a small-size electrodialysis device of public latrine zero release treatment, disposes the desalination liquid water tank, the desalination liquid water tank is provided with raw water inhalant canal, normal water exhalant canal, raw water exhalant canal and backward flow inhalant canal, its characterized in that, small-size electrodialysis device includes at least:
the electrodialysis membrane stack is provided with a circulating water inlet, a circulating water outlet, a concentrated solution water inlet, a concentrated solution water outlet, an electrode solution water inlet and an electrode solution water outlet, the circulating water inlet is communicated with the raw water outlet channel, and the circulating water outlet is communicated with the backflow water inlet channel;
the concentrated solution water tank is provided with a concentrated solution outlet communicated with the concentrated solution water inlet and a concentrated solution inlet communicated with the concentrated solution water outlet; and
the polar liquid water tank is provided with a polar liquid outlet communicated with the polar liquid water inlet and a polar liquid inlet communicated with the polar liquid water outlet.
2. A compact electrodialysis unit according to claim 1, wherein a fine filter is disposed between said circulating water inlet and said raw water outlet channel.
3. A compact electrodialysis unit according to claim 1, wherein a desalted liquid circulating pump is provided between said circulating water inlet and said raw water outlet channel.
4. A compact electrodialysis unit according to claim 1, wherein a concentrate circulation pump is provided between the concentrate inlet and the concentrate outlet.
5. A compact electrodialysis unit according to claim 1, wherein a polar liquid circulation pump is provided between the polar liquid inlet and the polar liquid outlet.
6. A compact electrodialysis unit according to any one of claims 1 to 5, wherein said concentrate tank is further provided with a concentrate discharge outlet, said concentrate discharge outlet being provided with a concentrate discharge pump.
7. A compact electrodialysis unit according to claim 6, wherein the concentrate tank is provided with a low level monitoring device, a high level monitoring device and an ultra high level monitoring device.
8. A compact electrodialysis unit according to any one of claims 1 to 5 or 7, wherein the conduit between the electrodialysis membrane stack and the desalted water tank is provided with a flow monitoring device.
9. A compact electrodialysis unit according to any one of claims 1 to 5 or 7, further comprising a control/power supply cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022419366.6U CN213651966U (en) | 2020-10-27 | 2020-10-27 | Small-sized electrodialysis device for public toilet sewage zero discharge treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022419366.6U CN213651966U (en) | 2020-10-27 | 2020-10-27 | Small-sized electrodialysis device for public toilet sewage zero discharge treatment |
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| Publication Number | Publication Date |
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| CN213651966U true CN213651966U (en) | 2021-07-09 |
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| CN202022419366.6U Active CN213651966U (en) | 2020-10-27 | 2020-10-27 | Small-sized electrodialysis device for public toilet sewage zero discharge treatment |
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