CN109292926A - Wastewater treatment method in discarded sodium silicate process cast used sand treatment process - Google Patents
Wastewater treatment method in discarded sodium silicate process cast used sand treatment process Download PDFInfo
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- CN109292926A CN109292926A CN201811170225.6A CN201811170225A CN109292926A CN 109292926 A CN109292926 A CN 109292926A CN 201811170225 A CN201811170225 A CN 201811170225A CN 109292926 A CN109292926 A CN 109292926A
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Classifications
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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
- C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical 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
- C02F1/52—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
- C02F2001/007—Processes including a sedimentation step
-
- 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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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses the wastewater treatment method in a kind of discarded sodium silicate process cast used sand treatment process, sewage-treating agent is mixed by following raw material: 15-40 parts of bentonite, 5-15 parts of aluminium polychloride, 1-3 parts of aluminum sulfate, 0.5-1.5 parts of zinc chloride, 0.5-1.5 parts of chitosan, 1-2.5 parts of Sodium Polyacrylate, 2-6 parts of starch；The viscosity-average molecular weight 2000-4000 of Sodium Polyacrylate, the molecular weight 8000-12000 of chitosan, starch are water solubility；Sewage is quantified into introducing processing pond；Sewage adjustment makes pH value be greater than 8.5；Sewage-treating agent 0.95-1.05 parts by weight are added in every 1000 parts by weight sewage；Stir 10-30min；It staticly settles flocculate blowdown after 30-60min, it will treated that water extracts reuse out；It empties post-processing next group and quantifies sewage.Process is relatively simpler, and cost for wastewater treatment is relatively low.
Description
Technical field
The invention belongs to technical field of sewage, it is related to the waste water discarded in sodium silicate process cast used sand treatment process
Processing method.
Background technique
China is maximum castings production country in the world today, and Foundry Works's point is a up to more than 20,000, the water consumed every year
Hyaline-quartz sand is more than 30,000,000 tons, and the discharge of a large amount of discarded sodium silicate process cast used sands, both having polluted environment, (water-glass sand contains
Alkali) and waste of resource.High-quality, the inexpensive regeneration of discarded sodium silicate process cast used sand is had been achieved at present.Discarded
Water consumption is big during sodium silicate process cast used sand wet-treating.Sewage is mainly fallen off life by casting discarded sand surface silica gel
At, concentration is high, and it is muddy, stablize.It must be using the wastewater treatment method for its composition feature.Dry reclamation is at high cost, dust is more；
Wet reclamation land occupation is wide, process generates a large amount of waste water and the sludge of high-moisture percentage and can not handle.Wet reclamation antiquated sand technology produces
Contain the suspended matters such as a large amount of coal dust, quartzy fine powder, clay in raw waste water, the COD in waste water exists in 100mg/L or more, BOD
30mg/L or more, waste water is very muddy, and direct emission, which enters river, can destroy ecological environment, such as leads to a large amount of biological deaths in korneforos
Deng.It handles a large amount of waste water and needs to occupy a large amount of place, cause cost for wastewater treatment very high, handle the sludge obtained after waste water
Moisture content is very high, easily causes secondary pollution.The problem of processing waste water cannot solve, and will restrict wet reclamation antiquated sand technology
It promotes and applies,
Such as: Authorization Notice No. is that it is wet to provide a kind of mixed type cast waste sand in the Chinese patent of CN103351065B
Waste water, is demulsified by the regenerated wastewater treatment method of method first, then the biggish suspended matter of particle in waste water is existed with inorganic flocculating agent
Flocculation in spiral flocculation tank, then uses the lesser suspended matter of organic flocculant coagulated particles again, and it is heavy to stand by tube settler pond
Drop, compresses the flocbed to be formed in bottom and takes through settling tank base sludge pumping, flocculated again with organic flocculant, finally use band
The processing of vacuum pressure filtration integration machine is concentrated in formula, and the moisture percentage in sewage sludge come out from belt thickener vacuum pressure filtration integration machine filtered solid outlet exists
40% or less；And the overflow supernatant in tube settler pond and reach from the clear water of belt thickener vacuum pressure filtration integration machine clear water output
Production cycle is required with water and the standard of direct emission.
Specifically include following process:
A, it is demulsified: by the demulsifier toward addition waste water weight 0.01-0.05% inside waste water, making the liquid knot of emulsifying
Structure destroys, and is come with reaching solid-liquid two-phase laminated flow in emulsion；The demulsifier be by alkyl phenolic resin and polyoxyethylene,
The oil-soluble non-ionic demulsifier that polyoxypropylene is polymerized；
B, primary flocculation: the waste water after demulsification is pumped into level-one spiral flocculation tank, is added weight concentration 10-25%'s
Inorganic flocculating agent solution, additional amount are the 1/800-1/1500 of waste water weight, are flocculated 20-60 seconds；
The inorganic flocculating agent is aluminium polychloride, polyaluminium sulfate or bodied ferric sulfate；
C, secondary flocculation: the material in level-one spiral flocculation tank is transferred to deuterostrophies flocculation tank, weight concentration is added
For the organic flocculant of 0.1-0.5%, additional amount is the 1/800-1/1500 of waste water weight, is flocculated 30-80 seconds, then second level
The material of spiral flocculation tank is transferred in oblique plate closed box, staticly settles 30-60min；
The organic flocculant is wherein the one of polyacrylamide solution and polydimethyl diallyl ammonium chloride solution
Kind or two kinds of mixture；
D, flocculate three times: the sediment of oblique plate closed box bottom delivers into three-level spiral flocculation tank by sludge pump, adds
Enter the organic-flocculation agent solution that weight concentration is 0.1-0.5%, additional amount is the 1/800-1/1500 of waste water weight, and flocculate 30-
After 80 seconds, the material in three-level spiral flocculation tank enters belt thickener vacuum from the distributing trough of belt thickener vacuum pressure filtration integration machine
Pressure filtration integration machine, the moisture percentage in sewage sludge come out from belt thickener vacuum pressure filtration integration machine filtered solid outlet is 40% hereinafter, and inclined plate
The overflow supernatant of board concentrating box and reaches production cycle from the clear water of belt thickener vacuum pressure filtration integration machine clear water output and wanted with water
It asks and the standard of direct emission；
The organic flocculant is wherein the one of polyacrylamide solution and polydimethyl diallyl ammonium chloride solution
Kind or two kinds of mixture.
It can of course be used using the wastewater treatment method of the above technology, but process is relative complex, cost for wastewater treatment phase
To higher, using effect is ideal not enough.
Summary of the invention
In order to overcome the deficiencies of the prior art, the present invention provides that a kind of process is relatively easy, and cost for wastewater treatment is relatively low
Discarded sodium silicate process cast used sand treatment process in wastewater treatment method.
The present invention is to reach technical solution used by above-mentioned technical purpose to be: discarded sodium silicate process cast used sand processing
Wastewater treatment method in the process, sewage-treating agent are mixed by the raw material of following parts by weight: 15-40 parts of bentonite, polymerization
5-15 parts of aluminium chloride, 0.5-1.5 parts of zinc chloride, 0.5-1.5 parts of chitosan, 1-2.5 parts of Sodium Polyacrylate, forms sediment at 1-3 parts of aluminum sulfate
2-6 parts of powder；The viscosity-average molecular weight of the Sodium Polyacrylate is 2000-4000, and the molecular weight of the chitosan is 8000-
12000, the starch is water solubility；Processing step are as follows:
A, the sewage in sewage collection chamber is quantitatively introduced into processing pond；
B, the quantitative sewage in processing pond, which first passes through pH value adjustment, makes the pH value of quantitative sewage be greater than 8.5；
C, sewage-treating agent is then added in processing pond, every 1000 parts by weight sewage uses sewage-treating agent 0.95-
1.05 parts by weight；
D, 10-30min is stirred；
E, staticly settle flocculate blowdown after 30-60min from processing bottom of pond portion, from processing pond at the top of will treated water
Extraction is for reuse；
F, next group is reprocessed after processing pond empties quantifies sewage.
The beneficial effects of the present invention are: since sewage-treating agent of the invention uses above-mentioned be directed to discard sodium silicate process casting
The specific composition for making dirt in the waste water in old sand treatment process carries out specific preparation, and process is relatively simpler, wastewater treatment
Advantage of lower cost, using effect are more preferable.
The present invention will be further described in detail with reference to the specific embodiments:
Specific embodiment
Embodiment 1, discard sodium silicate process cast used sand treatment process in wastewater treatment method, sewage-treating agent by with
The raw material of lower parts by weight is mixed: 15 parts of bentonite, 5 parts of aluminium polychloride, 1 part of aluminum sulfate, 0.5 part of zinc chloride, chitosan
0.5 part, 1 part of Sodium Polyacrylate, 2 parts of starch；The viscosity-average molecular weight of the Sodium Polyacrylate is 2000-4000, the shell
The molecular weight of glycan is 8000-12000, and the starch is water solubility；Processing step are as follows:
A, the sewage in sewage collection chamber is quantitatively introduced into processing pond；
B, the quantitative sewage in processing pond, which first passes through pH value adjustment, makes the pH value of quantitative sewage be greater than 8.5；
C, sewage-treating agent is then added in processing pond, every 1000 parts by weight sewage uses 0.95 weight of sewage-treating agent
Part；
D, 10min is stirred；
E, staticly settle flocculate blowdown after 30min from processing bottom of pond portion, from processing pond at the top of will treated that water is taken out
Out for reuse；
F, next group is reprocessed after processing pond empties quantifies sewage.
Embodiment 2, discard sodium silicate process cast used sand treatment process in wastewater treatment method, sewage-treating agent by with
The raw material of lower parts by weight is mixed: 40 parts of bentonite, 15 parts of aluminium polychloride, 3 parts of aluminum sulfate, 1.5 parts of zinc chloride, chitosan
1.5 parts, 2.5 parts of Sodium Polyacrylate, 6 parts of starch；The viscosity-average molecular weight of the Sodium Polyacrylate is 2000-4000, described
The molecular weight of chitosan is 8000-12000, and the starch is water solubility；Processing step are as follows:
A, the sewage in sewage collection chamber is quantitatively introduced into processing pond；
B, the quantitative sewage in processing pond, which first passes through pH value adjustment, makes the pH value of quantitative sewage be greater than 8.5；
C, sewage-treating agent is then added in processing pond, every 1000 parts by weight sewage uses 1.05 weight of sewage-treating agent
Part；
D, 30min is stirred；
E, staticly settle flocculate blowdown after 60min from processing bottom of pond portion, from processing pond at the top of will treated that water is taken out
Out for reuse；
F, next group is reprocessed after processing pond empties quantifies sewage.
Embodiment 3, discard sodium silicate process cast used sand treatment process in wastewater treatment method, sewage-treating agent by with
The raw material of lower parts by weight is mixed: 22 parts of bentonite, 10 parts of aluminium polychloride, 2 parts of aluminum sulfate, 1 part of zinc chloride, chitosan 1
Part, 1.8 parts of Sodium Polyacrylate, 4 parts of starch；The viscosity-average molecular weight of the Sodium Polyacrylate is 2000-4000, and the shell is poly-
The molecular weight of sugar is 8000-12000, and the starch is water solubility；Processing step are as follows:
A, the sewage in sewage collection chamber is quantitatively introduced into processing pond；
B, the quantitative sewage in processing pond, which first passes through pH value adjustment, makes the pH value of quantitative sewage be greater than 8.5；
C, sewage-treating agent is then added in processing pond, every 1000 parts by weight sewage uses 1 parts by weight of sewage-treating agent；
D, 20min is stirred；
E, staticly settle flocculate blowdown after 45min from processing bottom of pond portion, from processing pond at the top of will treated that water is taken out
Out for reuse；
F, next group is reprocessed after processing pond empties quantifies sewage.
To further explanation of the invention: the aluminium polychloride, aluminum sulfate, zinc chloride, shell in the sewage-treating agent are poly-
Sugared three is modified solvent；Chitosan, Sodium Polyacrylate, starch three in the sewage-treating agent are flocculant.
Claims (1)
1. the wastewater treatment method in discarded sodium silicate process cast used sand treatment process, it is characterised in that: sewage-treating agent by
The raw material of following parts by weight is mixed: 15-40 parts of bentonite, 5-15 parts of aluminium polychloride, 1-3 parts of aluminum sulfate, zinc chloride
0.5-1.5 parts, 0.5-1.5 parts of chitosan, 1-2.5 parts of Sodium Polyacrylate, 2-6 parts of starch；The viscosity of the Sodium Polyacrylate is flat
Average molecular weight is 2000-4000, and the molecular weight of the chitosan is 8000-12000, and the starch is water solubility；Processing step
Are as follows:
A, the sewage in sewage collection chamber is quantitatively introduced into processing pond；
B, the quantitative sewage in processing pond, which first passes through pH value adjustment, makes the pH value of quantitative sewage be greater than 8.5；
C, sewage-treating agent is then added in processing pond, every 1000 parts by weight sewage uses sewage-treating agent 0.95-1.05 weight
Measure part；
D, 10-30min is stirred；
E, staticly settle flocculate blowdown after 30-60min from processing bottom of pond portion, from processing pond at the top of will treated water extraction
For reuse；
F, next group is reprocessed after processing pond empties quantifies sewage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811170225.6A CN109292926A (en) | 2018-10-08 | 2018-10-08 | Wastewater treatment method in discarded sodium silicate process cast used sand treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811170225.6A CN109292926A (en) | 2018-10-08 | 2018-10-08 | Wastewater treatment method in discarded sodium silicate process cast used sand treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109292926A true CN109292926A (en) | 2019-02-01 |
Family
ID=65161914
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|---|---|---|---|
| CN201811170225.6A Pending CN109292926A (en) | 2018-10-08 | 2018-10-08 | Wastewater treatment method in discarded sodium silicate process cast used sand treatment process |
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| CN108423718A (en) * | 2018-03-21 | 2018-08-21 | 安庆市龙珠包装有限公司 | A kind of printing and dyeing wastewater treatment agent |
| CN108483743A (en) * | 2018-05-25 | 2018-09-04 | 江苏大学 | A kind of coating wastewater processing system and method |
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| CN203679173U (en) * | 2014-02-10 | 2014-07-02 | 中机铸材科技（福建）有限公司 | High-efficiency fine sorting device for recovering casting sodium silicate used sand |
| CN105060568A (en) * | 2015-08-26 | 2015-11-18 | 复旦大学 | Treatment method of CO2 hardened sodium silicate-bonded sand wet regenerated wastewater in casting industry |
| CN204918248U (en) * | 2015-08-26 | 2015-12-30 | 复旦大学 | Preface wholesale formula casting trade CO2 sclerosis sodium silicate sand wet reclamation waste water treatment equipment |
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Application publication date: 20190201 |