CN106396175B - Polish the processing method and polishing waste water treatment system of waste water - Google Patents
Polish the processing method and polishing waste water treatment system of waste water Download PDFInfo
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- CN106396175B CN106396175B CN201610939575.9A CN201610939575A CN106396175B CN 106396175 B CN106396175 B CN 106396175B CN 201610939575 A CN201610939575 A CN 201610939575A CN 106396175 B CN106396175 B CN 106396175B
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- 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
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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- 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
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- 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
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- 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
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- 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
- C02F2001/007—Processes including a sedimentation step
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- 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
- C02F2103/12—Nature of the water, waste water, sewage or sludge to be treated from the silicate or ceramic industries, e.g. waste waters from cement or glass factories
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- 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 relates to a kind of processing methods for polishing waste water.Polishing includes ceria and sodium salt suspending agent in waste water, polishes the processing method of waste water the following steps are included: highly basic is added into the polishing waste water and destroys the suspension characteristic for polishing waste water and obtains intermediate liquid；Flocculant progress flocculation treatment is added into the intermediate liquid and obtains reaction solution, the flocculant includes aluminium polychloride and polyacrylamide；And precipitation process is carried out to the reaction solution.By adding highly basic in polishing waste water, highly basic can have an effect with the suspending agent in polishing waste water and destroy the suspension characteristic of suspending agent, or it is dissolved in suspending agent in alkaline environment, lead to polish the suspending agent failure in waste water, its viscous pasty state is destroyed simultaneously, makes polishing waste water become prone to settle, then adds common flocculant, in this way, settling rate greatly improves.
Description
Technical field
The present invention relates to field of waste water treatment, more particularly to a kind of processing method for polishing waste water and polishing wastewater treatment
System.
Background technique
Glass thinning industry will use polishing powder and polish to the glass after chemical etching, the main component of polishing powder
For ceria, polishing powder is configured to certain density solution when use.To avoid polishing powder from precipitating in use, shadow
Polishing product quality is rung, polishing powder manufacturer can add a certain amount of suspending agent in polishing powder in process of production.However,
Addition suspending agent also increases the processing difficulty to polishing waste liquid.
The mode generallyd use in industry at present is natural sedimentation, since polishing waste water water is big, and after addition suspending agent
Polishing waste water by addition flocculant after be still difficult to precipitate, polishing waste water processing in natural sedimentation take a long time, throw
The treatment effeciency of light waste water is lower, therefore, must just increase the volume of sedimentation basin, certainly will increase investment.
Summary of the invention
Based on this, it is necessary to for the low problem of polishing waste water treatment efficiency, provide a kind of processing method for polishing waste water
And polishing waste water treatment system.
A kind of processing method polishing waste water, including ceria and sodium salt suspending agent, the throwing in the polishing waste water
The processing method of light waste water the following steps are included:
The suspension characteristic that addition highly basic destroys the polishing waste water into the polishing waste water obtains intermediate liquid；
Flocculant progress flocculation treatment is added into the intermediate liquid and obtains reaction solution, the flocculant includes polymerization chlorine
Change aluminium and polyacrylamide；And
Precipitation process is carried out to the reaction solution.
The highly basic that is added into the polishing waste water obtains intermediate liquid in one of the embodiments, described in destruction
In the step of polishing the suspension characteristic of waste water, the highly basic is added until the pH value of the polishing waste water is 8~9.
The highly basic is selected from least one of sodium hydroxide and calcium hydroxide in one of the embodiments,.
In one of the embodiments, the aluminium polychloride and it is described polishing waste water ratio be 240mg:1L~
260mg:1L；
And/or the polyacrylamide and the ratio for polishing waste water are 4mg:1L~6mg:1L.
The time for carrying out precipitation process to the reaction solution is 0.5h~2h in one of the embodiments,.
It further include in one of the embodiments, step after described the step of carrying out precipitation process to the reaction solution
It is rapid: the precipitating that the precipitation process obtains is filtered to obtain filter residue and filtrate.
The precipitating obtained to the precipitation process is filtered to obtain filter residue and filtrate in one of the embodiments,
The step of after further comprise the steps of: the ceria in the filter residue be recycled.
The precipitating obtained to the precipitation process is filtered to obtain filter residue and filtrate in one of the embodiments,
The step of after further comprise the steps of: and merge the filtrate with the intermediate liquid.
A kind of polishing waste water treatment system, comprising:
Reaction unit is reacted described in destruction for accommodating polishing waste water and highly basic being added into the polishing waste water
Polishing waste water suspension characteristic obtain intermediate liquid, and, the reaction unit can be added into the intermediate liquid flocculant into
Row flocculation treatment obtains reaction solution, and the flocculant includes aluminium polychloride and polyacrylamide；And
Settler, the settler are connected to the reaction unit, and the settler can be to the reaction unit
Obtained reaction solution carries out precipitation process.
The polishing waste water treatment system further includes filter device in one of the embodiments, the filter device with
The settler connection, the filter device is for being filtered the precipitating that the settler generates to obtain filter residue and filter
Liquid.
The processing method of above-mentioned polishing waste water, by adding highly basic in polishing waste water, highly basic can in polishing waste water
Sodium salt suspending agent have an effect and destroy the suspension characteristic of sodium salt suspending agent, or sodium salt suspending agent is made to be dissolved in alkaline environment
In, lead to polish the suspending agent failure in waste water, while destroying its viscous pasty state, makes polishing waste water become prone to settle, then
Common flocculant is added, in this way, settling rate greatly improves；Above-mentioned polishing waste water treatment system is provided with the
One charging (feeding) equipment adds the suspension characteristic that highly basic destroys the polishing waste water in polishing waste water, reduces the sedimentation time, improves
The treatment effeciency of polishing waste water further reduces the investment of processing polishing waste water.
Detailed description of the invention
Fig. 1 is the flow chart of the processing method of the polishing waste water of an embodiment；
Fig. 2 is the structural schematic diagram of the polishing waste water treatment system of an embodiment.
Specific embodiment
Make below mainly in combination with processing method and polishing waste water treatment system of the drawings and the specific embodiments to polishing waste water
Further details of explanation.
Referring to Fig. 1, the processing method of the polishing waste water of an embodiment mainly comprises the steps that
S01: highly basic is added into polishing waste water and obtains intermediate liquid, destroys the suspension characteristic of polishing waste water.
Polish includes polishing powder ceria and sodium salt suspending agent in waste water.In general, in order to avoid polishing powder dioxy
Change cerium to precipitate in use, a certain amount of suspending agent can be added in ceria, sodium salt suspending agent is a kind of common
Suspending agent.In the illustrated embodiment, sodium salt suspending agent is at least one of calgon and Sodium Polyacrylate.When
So, in other embodiments, sodium salt suspending agent is not limited at least one of calgon and Sodium Polyacrylate, other
Sodium salt suspending agent commonly used in the trade.
After study, polishing powder is caused to be difficult to the suspending agent that the principal element precipitated is addition, the suspending agent of addition is main
Acted on by following three: 1. increase the absolute value of particle surface current potentials to improve intergranular electrostatic repulsion；2. suspending
Agent forms adsorption layer in particle surface, generates and strengthen steric hindrance efficiency, increases intergranular steric hindrance repulsive interaction；3. increasing
The hydrophily of strong particle surface, increases aquation film strength and thickness, intergranular aquation repulsive interaction is enable to significantly increase.
By adding highly basic in the step, the environment of suspending agent is destroyed, leads to polish the suspending agent failure in waste water,
Its viscous pasty state is destroyed simultaneously, polishing waste water is made to become prone to settle.
Specifically, after sodium hydroxide, the strong alkaline substances such as calcium hydroxide being added into polishing waste liquid, strong alkaline substance can be with
It reacts with suspending agent calgon, dibastic sodium phosphate and disodium hydrogen phosphate etc. of the generation without suspension function, and poly- third
Olefin(e) acid sodium can be dissolved in alkaline solution, therefore, highly basic is added, destroys the suspension characteristic of sodium salt suspending agent, so that polishing
Waste water is easier to settle.
Specifically, highly basic is added into polishing waste liquid until polishing can be effectively reduced when the pH value of polishing waste water is to 8~9
The sedimentation time of waste water.
In the illustrated embodiment, the highly basic being added into polishing waste water is sodium hydroxide, and sodium hydroxide is with sodium hydroxide
The form of aqueous solution is added.The concentration of sodium hydrate aqueous solution can according to need allotment, it is only necessary to guarantee that the throwing after highly basic is added
The pH value of light waste water is 8~9.In another embodiment, the highly basic of addition can also be calcium hydroxide or hydrogen-oxygen
Change potassium, selected solvent, which can also be added, in highly basic in the form of solid state perhaps suspension can be water or ethyl alcohol,
It can be other good solvents other than water removal or ethyl alcohol.In the present embodiment, into polishing waste water, addition sodium hydroxide is water-soluble
The mode of liquid is in another embodiment, to can also be by the way of being added dropwise and directly once add or add step by step.
In the present embodiment, after highly basic being added into polishing waste water, polishing waste water is stirred.Stir process
Time is 0.2h~1h, preferably 0.5h.In another embodiment, the step of stir process also can be omitted.
S02: flocculant is added into intermediate liquid and carries out flocculation treatment, flocculant includes aluminium polychloride and polyacrylamide
Amine.
Preferably, the ratio of aluminium polychloride and polishing waste water is 240mg:1L~260mg:1L.Certainly, in other implementations
In mode, it can accordingly can increase aluminium polychloride dosage according to the case where polishing waste water or reduce aluminium polychloride and use
Amount.
Preferably, the ratio of polyacrylamide and the polishing waste water is 4mg:1L~6mg:1L.Certainly, in other implementations
In mode, it can accordingly can increase polyacrylamide dosage according to the case where polishing waste water or reduce polyacrylamide and use
Amount.
To polishing waste water in be added flocculant carry out flocculation treatment after, obtained reaction solution is stirred, stirring when
Between be 0.2h~1h, preferably 0.5h.In another embodiment, the step of stir process can be omitted.
S03: precipitation process is carried out to reaction solution.
In the present embodiment, it carries out precipitation process to reaction solution to refer to and stand reaction solution, the time of precipitation process is
0.5h~2h.Certainly in other embodiments, it can be appropriately extended or shorten the precipitation process time.
According to the processing method for the polishing waste water that the present invention program provides, the time of precipitating can be effectively reduced, precipitate
Time is reduced to 0.5h~2h, improves the treatment effeciency of polishing waste water.Meanwhile the construction scale of sedimentation basin is reduced, save engineering
Investment.
According to the processing method for the polishing waste water that the present invention program provides, the ceria removal rate of wastewater supernatant fluid is polished
Up to 85% or more.And the highly basic and flocculant being added are nontoxic, will not impact to drainage index.
After highly basic and flocculant is added in polishing waste water, the polishing powder in polishing waste water will form cotton-shaped particle and be deposited in
The bottom of pond of sedimentation basin.
S04: the precipitating that precipitation process is obtained is filtered to obtain filter residue and filtrate.
In the illustrated embodiment, it is taken out by the precipitating that diaphragm pump obtains precipitation process toward filter press and is filtered place
Reason.Under the action of pressure and filter cloth, the moisture in precipitating is discharged into after drainage channel is collected through filter cloth obtains filtrate, precipitates
In polishing powder be trapped on filter cloth collect after obtain filter residue.Certainly, in other embodiments, obtained precipitating was carried out
The step of filter obtains filter residue and filtrate, can also be and be directly over filter-cloth filtering, be also possible to through vacuum filter, can also adopt
It is separated by solid-liquid separation with the mode of centrifuge separation.
The processing method of polishing waste water provided by the invention, can also avoid because precipitating is insufficient, polishing powder water content is too
Greatly, and in polishing powder the problem of suspending agent water suction being mingled with becomes viscous and blocks filter cloth, press filteration system is caused to paralyse.
S05: the ceria in filter residue is recycled.
The main component in filter residue after filtration treatment is ceria, is recycled to filter residue, then to filter residue into
Row purification, removes the impurity in filter residue, i.e., recyclable ceria.The method purified to filter residue, which can be, carries out filter residue
Dissolution refilters processing, is also possible to the method using chromatography, so that ceria is separated with impurity.
S06: filtrate is merged with intermediate liquid.
Filtrate obtained in S04 is merged with intermediate liquid and is handled again.Again to it after filtrate is merged with intermediate liquid
Middle addition flocculant carries out flocculation treatment, to avoid the pollution for causing environment is expelled directly out.
The processing method of above-mentioned polishing waste water, by adding highly basic in polishing waste water, highly basic can in polishing waste water
Sodium salt suspending agent have an effect and destroy the suspension characteristic of sodium salt suspending agent, or sodium salt suspending agent is made to be dissolved in alkaline environment
In, lead to polish the suspending agent failure in waste water, while destroying its viscous pasty state, makes polishing waste water become prone to settle, then
Common flocculant is added, in this way, settling rate greatly improves.
The processing method of above-mentioned polishing waste water, step S04, step S05 and step S06 can be omitted.
Referring to Fig. 2, the polishing waste water treatment system 100 of an embodiment include reaction unit 110, settler 120,
Filter device 130 and recyclable device 140.
Reaction unit 110 is reacted for accommodating polishing waste water and highly basic being added into polishing waste water to destroy polishing
The suspension characteristic of waste water obtains intermediate liquid, and, reaction unit can add flocculant progress flocculation treatment into intermediate liquid and obtain
To reaction solution, flocculant includes aluminium polychloride and polyacrylamide.
In the illustrated embodiment, reaction unit 110 includes intermediate equipment 111 and consersion unit 113, intermediate equipment
111 are connected with consersion unit 113.
Intermediate equipment 110 is reacted useless to destroy polishing for accommodating polishing waste water and highly basic being added into polishing waste water
The suspension characteristic of water obtains intermediate liquid.In one of the embodiments, intermediate equipment 111 include the first charging (feeding) equipment, first
Charging (feeding) equipment is used to shed highly basic into polishing waste water.Intermediate equipment 111 further includes mixing plant, and mixing plant is used for polishing
Waste water is stirred, and after highly basic is added in polishing waste water, is stirred by mixing plant to polishing waste water, on the one hand can be with
Accelerate highly basic and polish the extent of reaction and reaction rate of waste water, on the other hand to react more uniform.
Consersion unit 113 can add flocculant progress flocculation treatment into intermediate liquid and obtain reaction solution.One wherein
In embodiment, consersion unit 113 includes the second charging (feeding) equipment, and the second charging (feeding) equipment is used to shed flocculant into polishing waste water.
Flocculant includes aluminium polychloride and polyacrylamide.Consersion unit 113 further includes mixing plant, and mixing plant is used for polishing
Waste water is stirred, and after flocculant is added in polishing waste water, is stirred by mixing plant to polishing waste water, on the one hand may be used
To accelerate flocculant and polish the extent of reaction and reaction rate of waste water, on the other hand make flocculation reaction more uniform.
In the present embodiment, intermediate equipment 111 and consersion unit 113 are respectively intermediate pool and reaction tank, it is believed that intermediate
Equipment 111 and consersion unit 113 can also be kettle, tower or slot.Certainly, intermediate equipment 111 and consersion unit 113 can merge
Both for an equipment, while having the function of.
In another embodiment, the first charging (feeding) equipment in intermediate equipment 111 and mixing plant and consersion unit 113
In the second charging (feeding) equipment and mixing plant can be omitted.
Settler 120, for carrying out precipitation process to reaction solution.Settler 120 is connected with reaction unit 110,
Specifically, being connected with consersion unit 113.In the present embodiment, settler 120 be sedimentation basin, settler 120 with react
Device 110 is connected by pipeline with suction pump, and the reaction solution in reaction unit 110 is delivered in settler, is sunk
Shallow lake processing, the time of polishing waste water precipitation process in settler 120 are 0.5h~2h.
Filter device 130, filter device 130 are connected with settler 120, the precipitating for generating settler into
Filter residue and filtrate is obtained by filtration in row.After highly basic and flocculant is added in polishing waste water, the polishing powder in waste water will form cotton-shaped
Particle is deposited in the bottom of pond of sedimentation basin, and in the present embodiment, filter device 130 is filter press, by diaphragm pump that precipitating pumping is past
Filter press is filtered processing to precipitating, and under the action of pressure and filter cloth, the moisture in precipitating is discharged into draining through filter cloth
Channel, the polishing powder in precipitating are trapped on filter cloth.In another embodiment, filter device 130 can also be film mistake
Filter, vacuum filter or centrifuge etc..
In the illustrated embodiment, filter device 130 is connected to reaction unit 110, specifically, connecting with consersion unit 113
It is logical, it is handled again for filtrate obtained in filter device 130 to be delivered to consersion unit 113, it is therefore prevented that filtrate is direct
It is discharged and pollutes environment.
Recyclable device 140, recyclable device 140 is for being recycled the ceria in filter residue, at filtering
The main component in filter residue after reason is ceria, is recycled to filter residue, then remove the impurity in filter residue, i.e., recyclable two
Cerium oxide.
It is appreciated that filter device 130 and recyclable device 140 can be omitted.Certainly, the centre in reaction unit 110 is set
Standby 111 also can be omitted.When omitting intermediate equipment 111, highly basic is directly first added in consersion unit 113, after highly basic is added
Flocculant is added into consersion unit 113 again and carries out flocculation treatment.Omitting intermediate equipment 111 can achieve same polishing waste water
Treatment effect, at the same time it can also save engineering cost.It is appreciated that intermediate equipment 111 and consersion unit 113 are also possible to close
And at an equipment.
Above-mentioned polishing waste water treatment system, intermediate equipment add highly basic in polishing waste water and destroy the outstanding of the polishing waste water
Floating characteristic, reduces the sedimentation time, improves the treatment effeciency of polishing waste water, further effectively reduces the construction rule of settler
Mould saves project inputs.
It is below the explanation of specific embodiment.
Embodiment one
1 ton of polishing waste water is handled, polishes and contains ceria and sodium salt suspending agent calgon in waste water
And Sodium Polyacrylate, it is 8.0 that the sodium hydroxide that 10g is added into polishing waste water, which adjusts the pH value of polishing waste water, after uniform water quality,
The aluminium polychloride of 250g and the polyacrylamide of 5g is added into polishing waste water；After sodium hydroxide and flocculant will be joined again
Polishing waste water carry out precipitation process 2h.
Ceria content detects in the supernatant obtained using gravimetric method to polishing waste liquid and precipitation process.Through surveying
Examination, the removal rate of ceria is up to 85% in supernatant.
Embodiment two
1 ton of polishing waste water is handled, polishes and contains ceria and sodium salt suspending agent calgon in waste water
And Sodium Polyacrylate, it is 8.5 that the sodium hydroxide that 11g is added into polishing waste water, which adjusts the pH value of polishing waste water, is denoted as intermediate fluid
After uniform water quality, the aluminium polychloride of 240g and the polyacrylamide of 6g is added into polishing waste water in body；Hydrogen-oxygen will be joined again
Polishing waste water after changing sodium and flocculant carries out precipitation process 0.5h.Sludge after precipitating is imported in filter press and carries out filters pressing
The filter residue retained by filter press is collected in processing, recycles the ceria in filter residue.By the logical filtrate being obtained by filtration and intermediate liquid
Mixing is handled again.
Ceria content detects in the supernatant obtained using gravimetric method to polishing waste liquid and precipitation process.Supernatant
The removal rate of ceria is up to 95% in liquid.
Embodiment three
1 ton of polishing waste water is handled, polishes and contains ceria and sodium salt suspending agent calgon in waste water
And Sodium Polyacrylate, it is 9.0 that the sodium hydroxide that 12g is added into polishing waste water, which adjusts the pH of polishing waste water, obtains intermediate liquid.
After uniform water quality, the aluminium polychloride of 260g and the polyacrylamide of 4g is added into polishing waste water；Hydroxide will be joined again
Polishing waste water after sodium and flocculant, which is passed through, carries out precipitation process 2h.Sludge after precipitating is imported in vacuum filter and is carried out
Filtration treatment collects filter residue, recycles the ceria in filter residue.It will be mixed again by the filtrate of vacuum filter with intermediate liquid
Secondary processing.
Ceria content detects in the supernatant obtained using gravimetric method to polishing waste liquid and precipitation process.Supernatant
The removal rate of ceria is up to 99% in liquid.
Example IV
1 ton of polishing waste water is handled, polishes and contains ceria and sodium salt suspending agent calgon in waste water
And Sodium Polyacrylate, it is 9.0 that the potassium hydroxide that 16.8g is added into polishing waste water, which adjusts the pH of polishing waste water, obtains intermediate fluid
Body.After uniform water quality, the aluminium polychloride of 250g and the polyacrylamide of 5g is added into polishing waste water；Hydrogen-oxygen will be joined again
Polishing waste water after changing potassium and flocculant carries out precipitation process 2h.Sludge after precipitating is imported in filter press and is carried out at filters pressing
Reason collects the filter residue retained by filter press, recycles the ceria in filter residue.It will be closed by the filtrate of filter press and intermediate liquid
And it handles again.
Ceria content detects in the supernatant obtained using gravimetric method to polishing waste liquid and precipitation process.Supernatant
The removal rate of ceria is up to 99% in liquid.
Embodiment five
1 ton of polishing waste water is handled, polishes and contains ceria and sodium salt suspending agent calgon in waste water
And Sodium Polyacrylate, it is 9.0 that the calcium hydroxide that 25g is added into polishing waste water, which adjusts the pH of polishing waste water, obtains intermediate liquid.
After uniform water quality, the aluminium polychloride of 250g and the polyacrylamide of 5g is added into polishing waste water；Hydroxide will be joined again
Polishing waste water after calcium and flocculant carries out precipitation process 2h, and the removal rate of ceria is up to 99% in supernatant.It will precipitate
Sludge afterwards, which imports, carries out filters pressing processing in filter press, collect the filter residue retained by filter press, recycle the ceria in filter residue.
It is handled being merged by the filtrate of filter press with intermediate liquid again.
Ceria content detects in the supernatant obtained using gravimetric method to polishing waste liquid and precipitation process.Supernatant
The removal rate of ceria is up to 99% in liquid.
Comparative example one
1 ton of polishing waste water is handled, polishes and contains ceria and sodium salt suspending agent calgon in waste water
And Sodium Polyacrylate, the aluminium polychloride of 250g and the polyacrylamide of 5g is added into polishing waste water；Flocculation will be joined again
Polishing waste water after agent carries out precipitation process 48h.
Ceria content detects in the supernatant obtained using gravimetric method to polishing waste liquid and precipitation process.Supernatant
The removal rate of ceria is up to 40% in liquid.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (7)
1. a kind of processing method for polishing waste water, exists including ceria and sodium salt suspending agent, feature in the polishing waste water
In, it is described polishing waste water processing method the following steps are included:
To it is described polishing waste water in be added highly basic until it is described polishing waste water pH value be 9, destroy it is described polishing waste water suspension
Characteristic obtains intermediate liquid；
Flocculant progress flocculation treatment is added into the intermediate liquid and obtains reaction solution, the flocculant includes aluminium polychloride
And polyacrylamide；And
Precipitation process is carried out to the reaction solution.
2. it is according to claim 1 polishing waste water processing method, which is characterized in that the highly basic be selected from sodium hydroxide and
At least one of calcium hydroxide.
3. the processing method of polishing waste water according to claim 1, which is characterized in that the aluminium polychloride and the throwing
The ratio of light waste water is 240mg:1L~260mg:1L；
And/or the polyacrylamide and the ratio for polishing waste water are 4mg:1L~6mg:1L.
4. the processing method of polishing waste water according to claim 1, which is characterized in that described to sink to the reaction solution
The time of shallow lake processing is 0.5h~2h.
5. the processing method of polishing waste water according to any one of claims 1 to 4, which is characterized in that described to described
It further comprises the steps of: to be filtered the precipitating that the precipitation process obtains after the step of reaction solution progress precipitation process and be filtered
Slag and filtrate.
6. the processing method of polishing waste water according to claim 5, which is characterized in that described to be obtained to the precipitation process
Precipitating be filtered to further comprise the steps of: after the step of obtaining filter residue and filtrate to return the ceria in the filter residue
Receipts processing.
7. the processing method of polishing waste water according to claim 5, which is characterized in that described to be obtained to the precipitation process
Precipitating be filtered to further comprise the steps of: after the step of obtaining filter residue and filtrate and close the filtrate and the intermediate liquid
And.
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|---|---|---|---|---|
| CN107129070A (en) * | 2017-05-18 | 2017-09-05 | 东莞市银特丰光学玻璃科技有限公司 | A kind of method of the anti-belt print residual of glass polishing |
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