CN109970230A - Waste water treatment system and wastewater treatment method - Google Patents
Waste water treatment system and wastewater treatment method Download PDFInfo
- Publication number
- CN109970230A CN109970230A CN201711450025.1A CN201711450025A CN109970230A CN 109970230 A CN109970230 A CN 109970230A CN 201711450025 A CN201711450025 A CN 201711450025A CN 109970230 A CN109970230 A CN 109970230A
- Authority
- CN
- China
- Prior art keywords
- waste water
- concentration
- mixed liquor
- flocculation
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention provides a kind of waste water treatment system and wastewater treatment method, which includes flocculation unit, concentration and separation unit, solid-liquid separation unit and filtrate processing unit.Flocculation unit carries out flocculation treatment for receiving waste water to be processed, forms mixed liquor；Concentration and separation unit carries out concentration and separation processing for receiving mixed liquor, forms concentrate and filtrate, and concentrate is delivered to flocculation unit and carries out being mixed to form concentration mixed liquor with mixed liquor；Solid-liquid separation unit is located at the downstream of flocculation unit, for receiving concentration mixed liquor to carry out solid-liquid separation treatment；Filtrate processing unit is located at concentration and separation unit downstream, for receiving filtrate to carry out removal of impurities processing, forms discharge water.Waste water treatment system provided by the invention has simple process, and high treating effect, stable and reliable operation, obtained discharge water contain less by-product.It can be suitable for the waste water that marine exhaust washing desulphurization system generates.
Description
Technical field
The present invention relates to technical field of waste water processing, and relate more specifically at a kind of waste water treatment system and a kind of waste water
Reason method.
Background technique
Marine exhaust washing desulphurization technology is the mainstream skill of current processing marine diesel exhaust gas sulphur oxide (SOx)
Art using the technology either processing system selection enclosed or hybrid will necessarily generate a certain amount of waste water.Due to the world
International Maritime Organization (IMO) (IMO) is made that strict regulations to the washing water discharge standard of marine exhaust cleaning systems, including discharge water
The indexs such as pH value, polycyclic aromatic hydrocarbon (PAH) content, turbidity, nitrate content, thus marine diesel exhuast gas desulfurization wastewater treatment at
For the key of marine exhaust washing system.
Since marine diesel exhaust gas washing desulphurization technology belongs to emerging technology, domestic and international marine diesel exhaust gas washing is de-
Sulphur device is few for the treatment process of its waste water to be discussed in detail.It is de- currently based on the marine diesel exhaust gas washing of sodium alkali
Sulphur technology becomes the mainstream technology of domestic and international marine diesel exhaust gas washing desulphurization due to desulfuration efficiency height etc., generation
The main component of waste water includes sulphite, nitrate, sulfate and a small amount of greasy dirt, impurity and particle etc., it is therefore desirable to a kind of
Effective waste water treatment process, to reach the index request that IMO is discharged about washing water.
Existing waste water treatment process by neutralize aoxidize the technique of quenched, air bearing-FLOTATION SEPARATION and subsequent filter purification into
The mode of row washing water process.But the technique suffers from the drawback that
1. treatment process device therefor mainly includes the equipment such as Slag Scraping Device, dissolving, air floatation machine, whole system is caused to be taken up an area
Space is big, the arrangement being unfavorable in cabin.
2. ship rides the sea when encountering stormy waves, hull, which can wave, shakes certain angle, and the sealing of slag equipment is scraped in air bearing
Type is poor, and there are the risks of leakage.
3. the technique is not to the processing of nitrate, in face of increasingly strict discharge standard, it is difficult to reach emission limit.
4. the technique is after flocculation sedimentation, particulate matter with scrape the foam after slag and mix water content nearly 80%, after processing
Amount of by-products it is larger.
Therefore, it is necessary to a kind of waste water treatment systems and a kind of wastewater treatment method, at least to be partially solved the prior art
The problem of.
Summary of the invention
A series of concept of reduced forms is introduced in Summary, this will in the detailed description section into
One step is described in detail.Summary of the invention is not meant to attempt to limit technical solution claimed
Key feature and essential features do not mean that the protection scope for attempting to determine technical solution claimed more.
In order at least be partially solved the above problem, according to an aspect of the invention, there is provided a kind of wastewater treatment system
System, for handling the waste water in marine exhaust washing desulphurization system, which includes flocculation unit, concentration and separation list
Member, solid-liquid separation unit and filtrate processing unit.
The flocculation unit carries out flocculation treatment for receiving the waste water to be processed, and being formed includes the mixed of floccule
Close liquid；
The concentration and separation unit is fluidly connected with the flocculation unit, and the concentration and separation unit is described mixed for receiving
Liquid is closed to carry out concentration and separation processing, forms concentrate and filtrate, and the concentrate is delivered to the flocculation unit and institute
Mixed liquor is stated to carry out being mixed to form concentration mixed liquor；
The solid-liquid separation unit is located at the downstream of the flocculation unit, and fluidly connects with the flocculation unit, institute
Solid-liquid separation unit is stated for receiving the concentration mixed liquor to carry out solid-liquid separation treatment；
The filtrate processing unit is located at the concentration and separation unit downstream, and connects with the concentration and separation unit fluid
It connects, the filtrate processing unit carries out removal of impurities processing for receiving the filtrate, forms discharge water.
According to this programme, waste water generates floccule through flocculation treatment to remove the impurity such as the greasy dirt in waste water, particulate matter.And
The content for increasing floccule in waste water by concentration and separation processing afterwards, isolates the filter without the insoluble impurity such as greasy dirt, particulate matter
Liquid.On the one hand solid-liquid separation treatment is carried out to floccule, so that insoluble impurity is finally removed in waste water.On the other hand to filtrate
It carries out removal of impurities processing further to remove soluble compound impurities, obtains the discharge for meeting the requirement of washing water discharge index
Water.
Waste water treatment system provided by the invention has simple process, high treating effect, stable and reliable operation, obtained row
It discharges water containing less by-product.It can be suitable for the waste water that marine exhaust washing desulphurization system generates, especially marine diesel oil
The waste water that machine exhaust gas washing desulphurization generates.
Preferably, the flocculation unit includes at least three flocculation containers for successively fluidly connecting setting, at least three medicines
Agent is respectively added to the waste water in at least three flocculations container.As a result, waste water is successively carried out at least three times
Flocculation treatment, so that the insoluble impurity such as greasy dirt, particulate matter can be preferably removed.
Preferably, at least three medicament includes the coagulant for being successively added to the waste water, pH value adjustment agent and wadding
Solidifying agent.As a result, in waste water, floccule can be generated, floccule is further assembled, and generates bigger floccule.
Preferably, the concentration and separation unit includes the filter plant fluidly connected with the flocculation unit, the filtering
Equipment is filtered processing for receiving the mixed liquor, forms the concentrate and the filtrate.As a result, using film
Filter type can obtain the preferable waste water for the treatment of effect.
Preferably, the filter plant is pipe type ultrafiltration device.As a result, can be improved the processing energy of filter plant
Power, and make the better processing effect of waste water.
Preferably, the concentration and separation unit further includes cleaning device, the cleaning device and the filter plant fluid
Connection, to clean the filter plant.As a result, the filter membrane in filter plant is able to maintain preferable film properties, reduce
The degree of fouling membrane.
Preferably, the concentration and separation unit further includes circulating pump, the import of the circulating pump and the filter plant stream
Body connection, outlet fluidly connect with the flocculation unit, the concentrate are mixed with the mixed liquor.
Preferably, the concentration and separation unit further includes frequency converter, and the frequency converter is used to control turning for the circulating pump
Speed is to adjust the flow that mixed liquor is concentrated.As a result, filter plant can reach the production water of continuous-stable.
Preferably, the filtrate processing unit includes at least two absorbers for being filled with active carbon and/or resin, described
At least two absorbers are successively fluidly connected to carry out adsorption treatment to the impurity in the filtrate.Thus, it is possible to using absorption
The mode of processing removes the organic matters such as the polycyclic aromatic hydrocarbon in waste water and nitrite, nitrate, sulfate plasma impurity.
Preferably, the solid-liquid separation unit includes the centrifugal device fluidly connected with the flocculation unit, the centrifugation
Device mixes the centrifugate of formation with the waste water for receiving the concentration mixed liquor to be centrifuged.
Thus, it is possible to which sludge is separated from waste water.
According to another aspect of the present invention, a kind of wastewater treatment method is provided, it is de- for handling marine exhaust washing
Waste water in sulphur system, the wastewater treatment method include following steps in sequence:
Flocculation step carries out flocculation treatment to the waste water to be processed, forms the mixed liquor including floccule；
Concentration step carries out concentration and separation processing to the mixed liquor, forms concentrate and filtrate, and by the concentrate
It carries out being mixed to form concentration mixed liquor with the mixed liquor；
Solid-liquid separation step carries out solid-liquid separation treatment to the concentration mixed liquor；With
Filtrate processing step carries out removal of impurities processing to the filtrate, forms discharge water.
According to this programme, waste water generates floccule through flocculation treatment to remove the impurity such as the greasy dirt in waste water, particulate matter.And
The content for increasing floccule in waste water by concentration and separation processing afterwards, isolates the filter without the insoluble impurity such as greasy dirt, particulate matter
Liquid.On the one hand solid-liquid separation treatment is carried out to floccule, so that insoluble impurity is finally removed in waste water.On the other hand to filtrate
It carries out removal of impurities processing further to remove soluble compound impurities, obtains the discharge for meeting the requirement of washing water discharge index
Water.
Wastewater treatment method provided by the invention has operating process simple, and high treating effect, stable and reliable operation obtains
Discharge water contain less by-product.Suitable for the waste water that marine exhaust washing desulphurization system generates, especially marine diesel oil
The waste water that machine exhaust gas washing desulphurization generates.
Preferably, the flocculation step includes at least three flocculation steps, at least three flocculation step, at least
Three medicaments are respectively added to the waste water in each flocculation step.
Preferably, at least three medicament includes the coagulant for being successively added to the waste water, pH value adjustment agent and wadding
Solidifying agent.
Preferably, the concentration step includes filtration step, in the filtration step, using filter plant to described mixed
It closes liquid and is filtered processing, form the concentrate and the filtrate.
Preferably, the filter plant is pipe type ultrafiltration device.
Preferably, the concentration step further includes cleaning step, in the cleaning step, is carried out to the filter plant
Cleaning.
Preferably, in the concentration step, the concentrate of the filter plant output is conveyed by circulating pump,
To be mixed with the mixed liquor.
Preferably, in the concentration step, the revolving speed of circulating pump described in Frequency Converter Control is used to adjust the concentration
The flow of liquid.
Preferably, in the filtrate processing step, the filtrate is successively carried out at least using active carbon and/or resin
Adsorption treatment twice, to adsorb the impurity in the filtrate.
Preferably, in the solid-liquid separation step, the concentration mixed liquor is centrifuged, the centrifugate of formation
It is mixed with the waste water.
Detailed description of the invention
Following drawings of the invention is incorporated herein as part of the present invention for the purpose of understanding the present invention.Shown in the drawings of this hair
Bright embodiment and its description, device used to explain the present invention and principle.In the accompanying drawings,
Fig. 1 is the process flow diagram according to the waste water treatment system of the preferred embodiment of the present invention；And
Fig. 2 is the equipment arrangement schematic diagram according to the waste water treatment system of the preferred embodiment of the present invention.
Description of symbols
10: flocculation unit 11: mixing channel
12: reactive tank 13: thickener
14: the first shifting pump 15:PAC slots
16:NaOH slot 17:PAM slot
20: concentration and separation unit 21: filter plant
22: 23: the second shifting pump of circulating pump
24: cleaning device 25: cleaning sink
26: third shifting pump 30: solid-liquid separation unit
31: 32: the four shifting pump of centrifugal device
40: 41: the first absorber of filtrate processing unit
42: the second absorbers 43: booster pump
44: discharge tank 50: wastewater trough
Specific embodiment
In the following description, a large amount of concrete details are given so as to provide a more thorough understanding of the present invention.So
And it is obvious to the skilled person that the present invention may not need one or more of these details and be able to
Implement.In other examples, in order to avoid confusion with the present invention, for some technical characteristics well known in the art not into
Row description.
In order to thoroughly understand the present invention, detailed structure will be proposed in following description, to illustrate the present invention.It is aobvious
So, execution of the invention is not limited to the specific details that the those skilled in the art are familiar with.Preferable reality of the invention
Example is applied to be described in detail as follows, however other than these detailed descriptions, the present invention can also have other embodiments, should not solve
It is interpreted as being confined to embodiments presented herein.
It should be understood that the purpose of term as used herein is only that description specific embodiment and not as the present invention
Limitation, " one " of singular, "one" and " described/should " be also intended to include plural form, unless the context clearly indicates
Other mode.When the term " comprising " and/or " including " is used in this specification, indicate there are the feature, entirety,
Step, operation, element and/or component, but do not preclude the presence or addition of other one or more features, entirety, step, operation,
Element, component and/or their combination.Term " on " used in the present invention, "lower", "front", "rear", "left", "right" with
And similar statement is for illustrative purposes only, not limits.
The cited such as ordinal number of " first " and " second " is only to identify in the present invention, without any other
Meaning, such as specific sequence etc..Moreover, for example, term " first component " itself does not imply that the presence of " second component ", art
Language " second component " does not imply that the presence of " first component " in itself.
Hereinafter, specific embodiments of the present invention are described in more detail with reference to the accompanying drawings, those figures show this
The representative embodiment of invention is not to limit the present invention.
As depicted in figs. 1 and 2, the present invention provides a kind of waste water treatment systems, for handling marine exhaust washing desulphurization
Waste water in system.
The waste water treatment system includes flocculation unit 10, concentration and separation unit 20, solid-liquid separation unit 30 and filtrate processing
Unit 40.Flocculation unit 10 carries out flocculation treatment for receiving waste water to be processed, forms the mixed liquor including floccule.It is dense
Contracting separative unit 20 is fluidly connected with flocculation unit 10, and concentration and separation unit 20 is for receiving mixed liquor to carry out at concentration and separation
Reason forms concentrate and filtrate, and concentrate is delivered to flocculation unit 10 and carries out being mixed to form concentration mixed liquor with mixed liquor.
Solid-liquid separation unit 30 is located at the downstream of flocculation unit 10, and fluidly connects with flocculation unit 10.Solid-liquid separation unit 30 is used
Mixed liquor is concentrated to carry out solid-liquid separation treatment in receiving.Filtrate processing unit 40 is located at concentration and separation 20 downstream of unit, and
It is fluidly connected with concentration and separation unit 20.Filtrate processing unit 40 carries out removal of impurities processing for receiving filtrate, forms discharge water.
Waste water carries out flocculation treatment in flocculation unit 10 and generates a large amount of floccule, so that greasy dirt, particulate matter in waste water
Equal impurity can be attached to flocculate.Floccule is present in waste water, in order to which floccule can be separated from waste water, the present invention
It will include that the mixed liquor of floccule is delivered to solid-liquid separation unit 30, carry out solid-liquid separation treatment.In order to improve floccule
Solid-liquid separation effect, the present invention first carry out at concentration and separation waste water using concentration and separation unit 20 before solid-liquid separation treatment
Reason, so that the concentration of floccule improves.And during concentration and separation processing, obtain not including greasy dirt, particulate matter etc.
The waste water (filtrate) of insoluble impurity.Then filtrate processing unit 40 is used to carry out removal of impurities processing further to the waste water to remove
Soluble compound impurities finally obtain the discharge water for meeting the requirement of washing water discharge index.
Above-mentioned process flow is simple, and design is reasonable, high treating effect.And obtained discharge water contains less by-product
Object.It can be suitable for the waste water that marine exhaust washing desulphurization system generates, especially marine diesel exhaust gas washing desulphurization generates
Waste water.
Specifically, waste water to be processed is exported from marine exhaust washing desulphurization system to above-mentioned waste water treatment system, can be with
It first stores to wastewater trough 50, is then delivered to flocculation unit 10 again.Can guarantee in this way waste water to be processed can continuously, it is flat
Quietly it is input to flocculation unit 10.If necessary and/or it is expected, setting wastewater trough 50 can also not had to, by waste water to be processed
It is fed directly to flocculation unit 10.
Flocculation unit 10 includes at least three flocculation containers for successively fluidly connecting setting, and at least three medicaments respectively add
Add to the waste water at least three flocculation containers.At least three medicaments include the coagulant for being successively added to waste water, pH value adjustment
Agent and flocculant enable waste water to reach preferably flocculating effect.The number of flocculation container and the number of medicament can roots
It is determined according to wastewater flow to be processed and the treatment effect reached.Medicament uniformly mixes in each flocculation container, so that
Floccule can be generated quickly.Preferably, coagulant is using coagulant such as aluminium polychlorides.Flocculant use is such as poly-
The flocculants such as acrylamide.
In illustrated preferred embodiment, flocculation unit 10 include the mixing channel 11 (flocculation container) successively fluidly connected,
PH value adjustment slot (flocculation container) and thickener 13 (flocculation container).The outlet of wastewater trough 50 and the inlet fluid of mixing channel 11 connect
It connects, continuously to convey waste water to be processed to mixing channel 11.Aluminium polychloride (PAC) solution is added to useless in mixing channel 11
Water, so that generating the floccule of similar foam, biggish particulate matter can be attached to the surface of floccule.It is formed in mixing channel 11
The first mixed liquor including floccule is delivered to reactive tank 12 via the first shifting pump 14.NaOH solution is added to reactive tank 12
Waste water, and adjust the first mixed liquor pH value to meta-alkalescence so that floccule further generates aggreation.First mixed liquor
PH value be preferably 8~8.5, the flocculating effect of aluminium polychloride at this time is preferable, and floccule is more stable.It is formed in reactive tank 12
The second mixed liquor including floccule be delivered to thickener 13.Polyacrylamide (PAM) solution is added to the useless of thickener 13
Water further enhances flocculating effect, so that generating bigger floccule, lesser particulate matter can be attached to the table of floccule
Face.The third mixed liquor including floccule is formed in thickener 13.
Being concentrated and separated unit 20 includes and filter plant 21 and circulating pump 22.The import of filter plant 21 and thickener 13 flow
Body connection forms concentrate and filtrate for receiving third mixed liquor to be filtered processing.The import and filtering of circulating pump 22
The outlet of equipment 21 fluidly connects, and outlet and the flocculation unit 10 of circulating pump 22 fluidly connect, by concentrate and mixed liquor into
Row mixing.Specifically, as shown in Fig. 2, third mixed liquor is delivered to filter plant 21 via the second shifting pump 23, floccule is in mistake
It filters in equipment 21 and is intercepted, separated with effluent part.The filtrate of formation does not include the insoluble impurity such as greasy dirt, particulate matter.Including wadding
The concentrate of shape object is transmitted back to thickener 13 via the effect of circulating pump 22.Since the floccule of similar foam is lighter, lead to
Often it is suspended in the upper layer of waste water.Concentrate and third mixed liquor are mixed to form concentration mixed liquor by the present invention, on the one hand can
Allow the waste water upper layer of thickener 13 to form a large amount of floccule (sludge), on the other hand can reduce for storing waste water
Container number, save equipment occupation space and equipment cost.
It should be noted that " the first mixed liquor ", " the second mixed liquor " and " third mixed liquor ", which refers to, is added to corresponding medicine
Agent and waste water including floccule." third mixed liquor " and " concentration mixed liquor " is stored in the waste water in thickener 13, can
To be interpreted as identical waste water.For the ease of illustrating process flow, limited herein using two titles.That is dense
Waste water in contracting slot 13 carries out that concentrate is transmitted back to thickener 13 again after concentration and separation processing via concentration and separation unit 20,
It is mixed with waste water in thickener 13.
Preferably, filter plant 21 is pipe type ultrafiltration device.It is highly preferred that filter plant 21 selects Full-automatic tube-type ultrafiltration
Device, filtering accuracy is up to 800 μm.Membrane module is provided in filter plant 21.Membrane module is preferably hyperfiltration membrane assembly, material choosing
It selects using hydrophily, be not easy to adhere to pollutant, antiacid alkali, macromolecular organic film that is corrosion-resistant, having high filtration flux.Film filtering side
Formula is cross-flow filtration.The mode of slag formula is scraped relative to air bearing, membrane filtration pattern purifying water effect is more preferable, purer so as to obtain
Discharge water.This preferred embodiment enables to discharge water without microorganisms such as bacteriums using pipe type ultrafiltration device, no suspended substance,
There is good protective effect to subsequent nano-filtration or reverse osmosis advanced processing.And relative to traditional air floatation machine, greatly reduce
The device space, the arrangement demand that is more suitable in watercraft engine room, while the stability for enabling to system to run is stronger.
Further, concentration and separation unit 20 further includes frequency converter (not shown), and frequency converter is for control loop pump 22
The flow of mixed liquor is concentrated to adjust for revolving speed.This preferred embodiment controls circulating pump 22 using frequency converter, to reach
The production water of continuous-stable ensure that filter plant 21 is run steadily in the long term.
Preferably, concentration and separation unit 20 further includes cleaning device 24, and cleaning device 24 is fluidly connected with filter plant 21,
To clean filter plant 21.As shown in Fig. 2, cleaning device 24 include cleaning sink 25 and fluidly connected with cleaning sink 25 the
Three shifting pumps 26.Third shifting pump 26 is fluidly connected with filter plant 21, and ejected wash water is delivered to filter plant 21, shape after cleaning
At waste liquid be delivered to treatment unit for waste water.
Filtrate processing unit 40 includes at least two absorbers for being filled with the adsorbent of such as active carbon and/or resin,
At least two absorbers are successively fluidly connected to carry out adsorption treatment to the impurity in filtrate.Preferably, at least two absorber
Including being filled with the first absorber 41 of active carbon and being filled with the second absorber 42 of resin.Active carbon can adsorb useless
The organic matters such as the polycyclic aromatic hydrocarbon in water, resin can be selected as ion exchange resin, to adsorb the nitrite in waste water, nitric acid
Salt, sulfate plasma impurity.Thereby, it is possible to ensure to discharge water to can satisfy IMO to the washing water of marine exhaust cleaning systems
The requirement of discharge.
Further, it is one or more to can according to need setting for the first absorber 41 and the second absorber 42.From mistake
The filtrate that filter equipment 21 exports can successively be delivered to the first absorber 41 and the second absorber 42 by booster pump 43, so that
Waste water first carries out the removal of organic matter, then carries out the removal of ionic impurity.If necessary and/or it is expected, second can also be inhaled
Adnexa 42 is set to the upstream of the first absorber 41.Or two absorbers are arranged alternately.Through being formed after multiple adsorption treatment
Discharge water be delivered to discharge tank 44.Since, there are the resistance of fluid circulation, therefore, it is necessary to booster pump 43 is arranged in absorber
Waste water is sequentially entered to the first absorber 41 and the second absorber 42.
Due to the concentration and separation processing of concentration and separation unit 20, so that the waste water floccule in thickener 13 constantly increases
It is more.Waste water concentrating to a certain extent after, the floccule on waste water upper layer is exported to solid-liquid separation unit 30 to be separated by solid-liquid separation
Processing.Solid-liquid separation unit 30 includes the centrifugal device 31 fluidly connected with flocculation unit 10, and centrifugal device 31 is dense for receiving
Contracting mixed liquor is mixed the centrifugate of formation with waste water with being centrifuged.Specifically, as shown in Fig. 2, thickener
Concentration mixed liquor in 13 is delivered to centrifugal device 31 via the 4th shifting pump 32.31 pairs of concentration mixed liquors of centrifugal device carry out from
Heart separating treatment, by the large quantity of moisture carried in sludge from.In order to reduce the discharge of waste water, by centrate discharge to mixing channel
11, to carry out wastewater treatment in a series again.The economic benefit of waste water treatment system is improved as a result,.Centrifugal device 31 is excellent
It is selected as centrifuge.
Fig. 2 shows a kind of preferred embodiments of the equipment of waste water treatment system arrangement.As shown in Fig. 2, discharge tank
44, wastewater trough 50, mixing channel 11 and reactive tank 12 are separated by a groove body, and are arranged in the one of waste water treatment system
Side.Centrifugal device 31 is located on wastewater trough 50 and reactive tank 12, and the outlet of centrifugal device 31 be located in mixing channel 11 or
On.The medicament of flocculation unit 10 can store in pharmacy slot or pharmacy jar.PAC slot 15,16 and of NaOH slot are shown in figure
PAM slot 17 is set on reactive tank 12.The export pipeline of PAC slot 15 is connected to mixing channel 11, molten to convey aluminium polychloride
Liquid.The export pipeline of NaOH slot 16 is connected to reactive tank 12, to convey NaOH solution.The export pipeline of PAM slot 17 is connected to dense
Contracting slot 13, to convey polyacrylamide solution.Filter plant 21 is set to the side of above-mentioned groove body, and booster pump 43, first adsorbs
Device 41 and the second absorber 42 are arranged in rows.As a result, waste water treatment system has the advantages that equipment occupation space is small, thus
It can neatly be arranged in the cabin of ship.
Further, it is provided with PH sensor in NaOH slot 16, to monitor the pH value of waste water on-line.Setting in thickener 13
There is turbidity transducer, to monitor the turbidity of waste water on-line.Temperature sensor and polycyclic aromatic hydrocarbon sensing are provided in discharge tank 44
Device, to monitor the temperature and polycyclic aromatic hydrocarbon content of discharge water on-line.Thereby, it is possible to improve the Automated water of waste water treatment system
It is flat.
It is 5520kW that for ship, to promote mainly power, which be rated power, and rated speed is the low-speed diesel engine of 169r/min, should
Waste water treatment system of the invention is used after diesel exhaust washing desulphurization system, enables the processing capacity of waste water treatment system
Enough reach 1m3/h.And meet IMO to the washing water discharge standard of marine exhaust cleaning systems.
Further, using control system in waste water treatment system equipment and device control to adjust.Control system
System includes central control system and field control system, and has computer supervisory control system and computer network system.Pass through
Man-machine interface can realize the real time monitoring to system, alarm indication and statistical disposition.Particularly, control system can control frequency conversion
The operating status of device is adjusted the revolving speed of circulating pump by changing frequency converter frequency realization, to reach optimization filtering technique
Performance.And ensure that production safety is stablized, the production water of continuous-stable guarantees the service life of hyperfiltration membrane assembly, energy-saving, drop
Low operating cost is convenient to field monitoring and operation.
According to another aspect of the present invention, a kind of wastewater treatment method is provided, it is de- for handling marine exhaust washing
Waste water in sulphur system, the wastewater treatment method include following steps in sequence:
Flocculation step carries out flocculation treatment to waste water to be processed, forms the mixed liquor including floccule.
Concentration step carries out concentration and separation processing to mixed liquor, forms concentrate and filtrate, and by concentrate and mixed liquor
It carries out being mixed to form concentration mixed liquor.
Solid-liquid separation step carries out solid-liquid separation treatment to concentration mixed liquor.
Filtrate processing step carries out removal of impurities processing to filtrate, forms discharge water.
The wastewater treatment method of this preferred embodiment, treatment process, simple designs are reasonable, high treating effect.And
To discharge water contain less by-product.It can be suitable for the waste water that marine exhaust washing desulphurization system generates, especially ship
The waste water generated with diesel exhaust washing desulphurization.
Further, flocculation step includes at least three flocculation steps, at least three flocculation steps, at least three medicines
Agent is respectively added to the waste water in each flocculation step.At least three medicaments include the coagulant for being successively added to waste water, PH
It is worth regulator and flocculant.Flocculation reaction process is as described above.It should be noted that at least three flocculation steps are different
It is carried out in flocculation container, so that wastewater treatment process is continuous production process, to improve the processing energy of waste water system
Power.Flocculation step of the present invention preferably includes three flocculation steps, can also be into thus, it is possible to reach preferable flocculating effect
Reduce to one step the processing time of waste water.
Concentration step includes filtration step, in filtration step, is filtered processing to mixed liquor using filter plant 21,
Form concentrate and filtrate.This preferred embodiment carries out the solid-liquid separation treatment of the first order by the way of filtering to waste water.
On the one hand, since floccule can be intercepted in filter plant 21, available does not include the waste water of floccule, is given up
The better processing effect of water.On the other hand, since the concentration of floccule in concentrate increases, it can be improved subsequently solid
The processing capacity of liquid separation, so that the better effect of separating treatment.
Preferably, the concentrate that filter plant 21 exports is conveyed by circulating pump 22, to be mixed with mixed liquor.For
Enable filter plant 21 continuous-stable real estate water, this preferred embodiment uses the revolving speed of Frequency Converter Control circulating pump 22
To adjust the flow of concentrate.For example, when waste water treatment process operation at the beginning, need to waste water system carry out preliminary debugging,
So that the On-line Controls index such as additive amount of medicament is stablized.In the preliminary debugging stage, the useless of filter plant 21 is entered to
There may be flowed fluctuations for water, at this time, it may be necessary to control the flow of circulating pump 22.
Concentration step further includes cleaning step, in cleaning step, is cleaned to filter plant 21.This preferred implementation side
Formula cleans filter membrane using ejected wash water.Cleaning step is carried out simultaneously with filtration step, that is to say, that is set in filtering
While being filtered for 21, on-line cleaning is carried out to filter membrane, so that filter membrane is able to maintain preferable film properties, thus
Improve the processing capacity and treatment effect of waste water.For the longer life expectancy for making the filter membrane in filter plant 21, when fouling membrane reaches
After to a certain extent, it is also necessary to carry out chemical cleaning to membrane module.It should be noted that chemical cleaning is needed when filter plant 21
It is out of service, or in maintenance when carry out.
In filtrate processing step, adsorption treatment at least twice is successively carried out to filtrate using active carbon and/or resin, with
Impurity in absorption filtrate.Due to containing the organic matters and nitrite, nitrate, sulfate etc. such as polycyclic aromatic hydrocarbon in waste water
Ionic impurity needs to be removed above-mentioned soluble impurity in order to enable discharge water can satisfy the discharge standard of washing water.This
Preferred embodiment is handled filtrate by the way of adsorption-edulcoration, good impurity removing effect, can prevent from causing again water body
Secondary pollution problem is not present in secondary pollution.Preferably, the first adsorption treatment is carried out to filtrate using active carbon, it is polycyclic to adsorb
The organic matters such as aromatic hydrocarbons.Using such as ion exchange resin resin to filtrate carry out the second adsorption treatment, with adsorb nitrite,
Nitrate, sulfate plasma impurity.First adsorption treatment and the second adsorption treatment can carry out one or many, can also hand over
For progress.
Further, in solid-liquid separation step, concentration mixed liquor is centrifuged, the centrifugate and waste water of formation
It is mixed.This preferred embodiment carries out the solid-liquid separation treatment of the second level by the way of centrifuge separation to waste water, will give up
Sludge in water is isolated.The mud cake that centrifugation is formed carries out discharging manually, and outer processing of entrusting.Centrifugate is back to be processed
In waste water, continue above-mentioned processing step.
This preferred embodiment uses the solid-liquid separation treatment of above-mentioned two-stage, can be improved the processing energy of waste water treatment system
Power, the better processing effect of waste water.In order to guarantee the treatment effect of waste water, during the treatment, pH value, turbidity to waste water
It is monitored on-line.The temperature and PAH content of discharge water are monitored on-line.
Wastewater treatment method provided by the invention can be used above-mentioned waste water treatment system and realize, for brevity, tool
The waste water treatment process process of body is referred to the partial content of waste water treatment system.
Unless otherwise defined, technical and scientific term used herein and those skilled in the art of the invention
Normally understood meaning is identical.Term used herein is intended merely to describe specifically to implement purpose, it is not intended that limitation is originally
Invention.The terms such as herein presented " portion ", " part " can both indicate single part, can also indicate multiple parts
Combination.The terms such as herein presented " installation ", " setting " can both indicate that a component was attached directly to another portion
Part can also indicate that a component is attached to another component by middleware.It describes in one embodiment herein
Feature can be applied in combination another embodiment individually or with other features, unless this feature is in another implementation
It is not suitable for or is otherwise noted in mode.
The present invention has been explained by the above embodiments, but it is to be understood that, above-described embodiment is only intended to
The purpose of citing and explanation, is not intended to limit the invention to the scope of the described embodiments.Furthermore those skilled in the art
It is understood that the present invention is not limited to the above embodiments, introduction according to the present invention can also be made more kinds of member
Variants and modifications, all fall within the scope of the claimed invention for these variants and modifications.Protection scope of the present invention by
The appended claims and its equivalent scope are defined.
Claims (20)
1. a kind of waste water treatment system, for handling the waste water in marine exhaust washing desulphurization system characterized by comprising
Flocculation unit, the flocculation unit carry out flocculation treatment for receiving the waste water to be processed, and it includes cotton-shaped for being formed
The mixed liquor of object；
It is concentrated and separated unit, the concentration and separation unit is fluidly connected with the flocculation unit, and the concentration and separation unit is used for
The mixed liquor is received to carry out concentration and separation processing, forms concentrate and filtrate, and the concentrate is delivered to the wadding
Solidifying unit and the mixed liquor carry out being mixed to form concentration mixed liquor；
Solid-liquid separation unit, the solid-liquid separation unit are located at the downstream of the flocculation unit, and with the flocculation unit stream
Body connection, the solid-liquid separation unit is for receiving the concentration mixed liquor to carry out solid-liquid separation treatment；With
Filtrate processing unit, the filtrate processing unit are located at the concentration and separation unit downstream, and with the concentration and separation
Unit fluidly connects, and the filtrate processing unit carries out removal of impurities processing for receiving the filtrate, forms discharge water.
2. waste water treatment system according to claim 1, which is characterized in that the flocculation unit includes successively fluidly connecting
At least three flocculation containers being arranged, at least three medicaments are respectively added to described useless in at least three flocculations container
Water.
3. waste water treatment system according to claim 2, which is characterized in that at least three medicament includes successively adding
To coagulant, pH value adjustment agent and the flocculant of the waste water.
4. waste water treatment system according to claim 1, which is characterized in that the concentration and separation unit includes and the wadding
The filter plant that solidifying unit fluidly connects, the filter plant are filtered processing for receiving the mixed liquor, form institute
State concentrate and the filtrate.
5. waste water treatment system according to claim 4, which is characterized in that the filter plant is pipe type ultrafiltration device.
6. waste water treatment system according to claim 4, which is characterized in that the concentration and separation unit further includes cleaning dress
It sets, the cleaning device is fluidly connected with the filter plant, to clean the filter plant.
7. waste water treatment system according to claim 4, which is characterized in that the concentration and separation unit further includes circulation
Pump, the import of the circulating pump are fluidly connected with the filter plant, and outlet is fluidly connected with the flocculation unit, will be described
Concentrate is mixed with the mixed liquor.
8. waste water treatment system according to claim 7, which is characterized in that the concentration and separation unit further includes frequency conversion
Device, the frequency converter are used to control the revolving speed of the circulating pump to adjust the flow of the concentration mixed liquor.
9. waste water treatment system according to claim 1, which is characterized in that the filtrate processing unit includes being filled with work
At least two absorbers of property charcoal and/or resin, at least two absorber are successively fluidly connected in the filtrate
Impurity carries out adsorption treatment.
10. waste water treatment system according to claim 1, which is characterized in that the solid-liquid separation unit include with it is described
The centrifugal device that flocculation unit fluidly connects, the centrifugal device are used to receive the concentration mixed liquor to be centrifuged,
And the centrifugate of formation is mixed with the waste water.
11. a kind of wastewater treatment method, for handling the waste water in marine exhaust washing desulphurization system, which is characterized in that including
It is following steps in sequence:
Flocculation step carries out flocculation treatment to the waste water to be processed, forms the mixed liquor including floccule；
Concentration step carries out concentration and separation processing to the mixed liquor, forms concentrate and filtrate, and by the concentrate and institute
Mixed liquor is stated to carry out being mixed to form concentration mixed liquor；
Solid-liquid separation step carries out solid-liquid separation treatment to the concentration mixed liquor；With
Filtrate processing step carries out removal of impurities processing to the filtrate, forms discharge water.
12. wastewater treatment method according to claim 11, which is characterized in that the flocculation step includes at least three waddings
Solidifying step, at least three flocculation step, at least three medicaments are respectively added in each flocculation step
The waste water.
13. wastewater treatment method according to claim 12, which is characterized in that at least three medicament includes successively adding
Add to coagulant, pH value adjustment agent and the flocculant of the waste water.
14. wastewater treatment method according to claim 12, which is characterized in that the concentration step includes filtration step,
In the filtration step, processing is filtered to the mixed liquor using filter plant, forms the concentrate and the filter
Liquid.
15. wastewater treatment method according to claim 14, which is characterized in that the filter plant is tubular type ultrafiltration dress
It sets.
16. wastewater treatment method according to claim 14, which is characterized in that the concentration step further includes cleaning step
Suddenly, in the cleaning step, the filter plant is cleaned.
17. wastewater treatment method according to claim 14, which is characterized in that in the concentration step, the filtering
The concentrate of equipment output is conveyed by circulating pump, to be mixed with the mixed liquor.
18. wastewater treatment method according to claim 17, which is characterized in that in the concentration step, using frequency conversion
Device controls the revolving speed of the circulating pump to adjust the flow of the concentrate.
19. wastewater treatment method according to claim 11, which is characterized in that in the filtrate processing step, use
Active carbon and/or resin successively carry out adsorption treatment at least twice to the filtrate, to adsorb the impurity in the filtrate.
20. wastewater treatment method according to claim 11, which is characterized in that in the solid-liquid separation step, to institute
It states concentration mixed liquor to be centrifuged, the centrifugate of formation is mixed with the waste water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450025.1A CN109970230A (en) | 2017-12-27 | 2017-12-27 | Waste water treatment system and wastewater treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450025.1A CN109970230A (en) | 2017-12-27 | 2017-12-27 | Waste water treatment system and wastewater treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109970230A true CN109970230A (en) | 2019-07-05 |
Family
ID=67071732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711450025.1A Pending CN109970230A (en) | 2017-12-27 | 2017-12-27 | Waste water treatment system and wastewater treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109970230A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111039433A (en) * | 2019-12-13 | 2020-04-21 | 浙江天地环保科技有限公司 | System and method for treating ship tail gas desulfurization washing wastewater |
| CN113960279A (en) * | 2021-11-16 | 2022-01-21 | 江苏捷达离心机制造有限公司 | Alum flower centrifugal detection device |
| CN114835302A (en) * | 2022-06-01 | 2022-08-02 | 中船动力研究院有限公司 | Ship exhaust gas recirculation wastewater treatment system and ship |
| CN115286148A (en) * | 2022-09-02 | 2022-11-04 | 上海中船三井造船柴油机有限公司 | Process and equipment for treating wastewater for test car of marine host environment-friendly flue gas circulation system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2011104840A1 (en) * | 2010-02-25 | 2013-06-17 | 三菱重工業株式会社 | Exhaust gas treatment system and exhaust gas treatment method |
| CN204265565U (en) * | 2014-11-28 | 2015-04-15 | 中国船舶重工集团公司第七一一研究所 | Based on the marine exhaust desulfurization washing water treatment system of sodium alkali |
| CN105000713A (en) * | 2015-07-21 | 2015-10-28 | 北京中航泰达环保科技股份有限公司 | Desulfurization wastewater treatment system and desulfurization wastewater treatment method |
| CN105110510A (en) * | 2015-09-16 | 2015-12-02 | 山东电力工程咨询院有限公司 | Desulfurization waste water treatment system and treatment method capable of preventing sewage blocking |
| CN106517569A (en) * | 2016-05-17 | 2017-03-22 | 山东百川集大环境工程有限公司 | Zero discharge treatment process for desulfurization wastewater |
-
2017
- 2017-12-27 CN CN201711450025.1A patent/CN109970230A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2011104840A1 (en) * | 2010-02-25 | 2013-06-17 | 三菱重工業株式会社 | Exhaust gas treatment system and exhaust gas treatment method |
| CN204265565U (en) * | 2014-11-28 | 2015-04-15 | 中国船舶重工集团公司第七一一研究所 | Based on the marine exhaust desulfurization washing water treatment system of sodium alkali |
| CN105000713A (en) * | 2015-07-21 | 2015-10-28 | 北京中航泰达环保科技股份有限公司 | Desulfurization wastewater treatment system and desulfurization wastewater treatment method |
| CN105110510A (en) * | 2015-09-16 | 2015-12-02 | 山东电力工程咨询院有限公司 | Desulfurization waste water treatment system and treatment method capable of preventing sewage blocking |
| CN106517569A (en) * | 2016-05-17 | 2017-03-22 | 山东百川集大环境工程有限公司 | Zero discharge treatment process for desulfurization wastewater |
Non-Patent Citations (2)
| Title |
|---|
| 刘操: "《直排污水应急处理技术手册》", 30 April 2015, 北京：中国环境出版社 * |
| 巩耀武等: "《火力发电厂化学水处理实用技术》", 31 August 2006, 中国电力出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111039433A (en) * | 2019-12-13 | 2020-04-21 | 浙江天地环保科技有限公司 | System and method for treating ship tail gas desulfurization washing wastewater |
| CN113960279A (en) * | 2021-11-16 | 2022-01-21 | 江苏捷达离心机制造有限公司 | Alum flower centrifugal detection device |
| CN113960279B (en) * | 2021-11-16 | 2024-04-19 | 江苏捷达离心机制造有限公司 | Alum flower centrifugal detection device |
| CN114835302A (en) * | 2022-06-01 | 2022-08-02 | 中船动力研究院有限公司 | Ship exhaust gas recirculation wastewater treatment system and ship |
| CN115286148A (en) * | 2022-09-02 | 2022-11-04 | 上海中船三井造船柴油机有限公司 | Process and equipment for treating wastewater for test car of marine host environment-friendly flue gas circulation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109970230A (en) | Waste water treatment system and wastewater treatment method | |
| CN103463949B (en) | The method and apparatus of a kind of flue gas desulphurization system process greasy dirt, flue dust | |
| CN202156962U (en) | Demineralized water treating device for refining petroleum | |
| CA3005192A1 (en) | Standardized oilfield water treatment device and process using physical method | |
| CN209502536U (en) | A kind of industrial waste salt resource utilization device | |
| CN106830489A (en) | System for processing chrome-containing wastewater | |
| CN103319026A (en) | Device and method for treating waste liquor of gas desulphurization system during ship washing | |
| CN110510780A (en) | It is a kind of that cigarette waste water recycling processing unit and method are washed using STRO device | |
| CN206368082U (en) | A kind of efficient water treatment system of sanitary sewage | |
| CN115159739A (en) | Reverse osmosis seawater desalination system | |
| CN205099414U (en) | Reverse osmosis water treatment equipment | |
| CN105836954A (en) | System and method for efficient and energy-saving treatment of salt-containing wastewater | |
| CN110015779B (en) | Ship washing wastewater treatment device | |
| CN211612271U (en) | Environment-friendly semiconductor cutting grinding water microporous filtration system | |
| KR20190138975A (en) | Liquefied fertilizer purification apparatus using porous ceramic membrane | |
| CN209143930U (en) | A kind of coal fired power plant desulfurization wastewater dechlorination processing unit | |
| CN209383527U (en) | A kind of space flight furnace gasification ash water hardness removing device | |
| CN111039433A (en) | System and method for treating ship tail gas desulfurization washing wastewater | |
| CN102515385A (en) | Treating technology for removing sodium from high sodium salt wastewater and device thereof | |
| CN211664818U (en) | Ship tail gas desulfurization washing wastewater treatment system | |
| CN101524624A (en) | Gas drive membrane separation method and membrane separation device | |
| CN210796016U (en) | Electrode foil corrosion wastewater treatment system | |
| CN110357341A (en) | A kind of liquid containing ammonium sulfate waste water reclaiming, Zero discharging system and its technique | |
| CN205856236U (en) | A kind of wet flue gas desulfurization waste water processing means | |
| CN109133468A (en) | Coal fired power plant desulfurization wastewater dechlorination processing unit and technique |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190705 |
|
| RJ01 | Rejection of invention patent application after publication |