CN107459250A - A kind of preparation method of sewage dehydrating agent - Google Patents
A kind of preparation method of sewage dehydrating agent Download PDFInfo
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- CN107459250A CN107459250A CN201710873822.4A CN201710873822A CN107459250A CN 107459250 A CN107459250 A CN 107459250A CN 201710873822 A CN201710873822 A CN 201710873822A CN 107459250 A CN107459250 A CN 107459250A
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- Prior art keywords
- vermiculite
- dehydrating agent
- sludge
- preparation
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General 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)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to technical field of sludge treatment, and in particular to a kind of preparation method of sewage dehydrating agent.The present invention is used as raw material using vermiculite,By being calcined with iron oxide,In calcination process,The iron oxide of melting is flowed into the space of expanded vermiculite,Iron hydroxide is recycled to alkalize it,Recycle sodium chlorate,The iron oxide inside vermiculite is set to form poly-ferric chloride,It is supported on inside vermiculite,Improve the absorption property of vermiculite,Add iron ion simultaneously,Add the neutralization performance with mud granule surface charge,Improve dewatering efficiency,Finally and acrylamide,The monomers such as acrylyl oxy-ethyl-trimethyl salmiac are polymerize,Particle surface is wrapped up,Add the cation on surface,Add the effect of absorption bridging,The § current potentials of sludge can effectively be reduced,Improve the dehydrating effect of sludge,Dehydrating agent prepared by the present invention is used as base-material using vermiculite,Non-volatility,Vermiculite can also improve the activity of sludge simultaneously,Increase the utility of dehydrated sludge.
Description
Technical field
The invention belongs to technical field of sludge treatment, and in particular to a kind of preparation method of sewage dehydrating agent.
Background technology
Sludge refers to the discarded object of caused solid-state, semisolid and liquid in sewage disposal process, its complicated component, is
Formed by the suspension in sewage, microorganism, the organic matter of Institute of Micro-biology's absorption and microbiota metabolic activity product poly-
Collective.The key problem of Treatment of Sludge is the removing of moisture, i.e. minimizing.Sludge is after filter press press filtration in sewage treatment plant
Moisture percentage in sewage sludge still has 80~90%, and moisture content is difficult to quickly reduce, and sludge volume is very huge, hinder its subsequent treatment and
Increase freight, influence land use.
At present frequently with method be that sludge is nursed one's health with one or more of chemical agents, so as to change mud granule
Property, be easy to the removal of contained humidity in sludge.Sludge dehydrating agent the most frequently used at present is cationic-type polyacrylamide
(CPAM), although CPAM has preferable sludge dewatering effect, its a large amount of the shortcomings that being used as sludge dehydrating agent, also increasingly shows,
It is difficult degraded under field conditions (factors), and secondary pollution is caused to environment, and the big scale used in CPAM building-up processes
The organic solvents such as face activating agent can also pollute to environment.
The content of the invention
The technical problems to be solved by the invention：For current dehydrating agent in dehydration, the organic volatile of medicament is big,
Easily produce pollution to environment, and corrosive equipment, the problem of causing secondary pollution, the invention provides a kind of sewage dehydrating agent
Preparation method.
In order to solve the above technical problems, the present invention is using technical scheme as described below：
A kind of preparation method of sludge dehydrating agent, the preparation method comprise the following steps：
（1）Take vermiculite and iron oxide to be put into calcining furnace and calcined, collect calcined material, and carry out ball milling, sieve, collect sieving
Particle；
（2）Sieving particle is put into container with sodium hydroxide solution and is stirred, standing, using salt acid for adjusting pH to neutrality,
Filtering, filter residue is collected, using water washing filter residue until cleaning solution collects the filter residue after washing into neutrality；
（3）Count in parts by weight, take the filter residue after 50~80 parts of water, 30~40 parts of washings, 15~20 parts of acrylamides, 10~15
Part acrylyl oxy-ethyl-trimethyl salmiac, 3~5 parts of Peracetic acid, 1~3 part of sodium chlorate, 0.6~0.8 part of initiator and 0.5
~0.9 part of dodecyl sodium sulfate；
（4）Filter residue, sodium chlorate, Peracetic acid and the dodecyl sodium sulfate after water, washing are put into reactor first, 40
Stirred at~45 DEG C, the pH that the material in reactor is kept using sodium hydroxide solution is 6.0~6.5, then adds acryloyl
Amine, acrylyl oxy-ethyl-trimethyl salmiac, are protected using nitrogen, are warming up to 80~85 DEG C, are preheated, and add initiation
Agent, 95~105 DEG C are warming up to, reaction, is cooled to room temperature, is stood, discharging, collects out material, and be spray-dried, collect drying
Thing, produce sludge dehydrating agent.
The step（1）The mass ratio of middle vermiculite and iron oxide is 7:1~2.
The step（2）The mass ratio of middle sieving particle and sodium hydroxide solution is 1:3~5.
The step（3）Middle initiator is any one in ammonium persulfate, benzoyl peroxide.
Compared with other method, advantageous effects are the present invention：
The present invention is using the vermiculite with excellent absorbency as raw material, by being calcined with iron oxide, in calcination process, and leech
Stone is expanded, and the iron oxide of melting is flowed into the space of expanded vermiculite, recycles iron hydroxide to alkalize it, recycles chloric acid
Sodium etc., the iron oxide inside vermiculite is formed poly-ferric chloride, be supported on inside vermiculite, improve the absorption property of vermiculite, together
When add iron ion, add the neutralization performance with mud granule surface charge, improve dewatering efficiency, finally and acryloyl
The monomers such as amine, acrylyl oxy-ethyl-trimethyl salmiac are polymerize, and particle surface is wrapped up, add surface sun from
Son, the effect of absorption bridging is added, can effectively reduce the § current potentials of sludge, improve the dehydrating effect of sludge, prepared by the present invention
Dehydrating agent is using vermiculite as base-material, non-volatility, while vermiculite can also improve the activity of sludge, increases the profit of dehydrated sludge
Use performance.
Embodiment
The selection of initiator：Any one in ammonium persulfate, benzoyl peroxide.
A kind of preparation method of sludge dehydrating agent, the preparation method comprise the following steps：
（1）It is 7 in mass ratio:1~2, take vermiculite and iron oxide to be put into calcining furnace, calcining 50 is carried out at 1600~1700 DEG C
~60min, calcined material is collected, and be put into ball mill, 1~2h of ball milling is carried out with 800r/min, crosses 200 mesh sieves, collects sieving
Particle；
（2）It is 1 in mass ratio:3~5, sieving particle is put into container with 1.2mol/L sodium hydroxide solutions and is stirred, it is quiet
35~45min is put, salt acid for adjusting pH is reused to neutrality, filtering, filter residue is collected, using water washing filter residue until cleaning solution is in
Property, collect the filter residue after washing；
（3）Count in parts by weight, take the filter residue after 50~80 parts of water, 30~40 parts of washings, 15~20 parts of acrylamides, 10~15
Part acrylyl oxy-ethyl-trimethyl salmiac, 3~5 parts of Peracetic acid, 1~3 part of sodium chlorate, 0.6~0.8 part of initiator and 0.5
~0.9 part of dodecyl sodium sulfate；
（4）Filter residue, sodium chlorate, Peracetic acid and the dodecyl sodium sulfate after water, washing are put into reactor first, 40
2~3h is stirred at~45 DEG C, the pH that material in reactor is kept using sodium hydroxide solution is 6.0~6.5, then adds propylene
Acid amides, acrylyl oxy-ethyl-trimethyl salmiac, are protected using nitrogen, are warming up to 80~85 DEG C, carry out 20~25min of preheating,
Initiator is added, is warming up to 95~105 DEG C, reacts 3~5h, is cooled to room temperature, 1~2h is stood, discharging, collects out material,
And be spray-dried, dried object is collected, produces sludge dehydrating agent.
Example 1
The selection of initiator：Benzoyl peroxide.
A kind of preparation method of sludge dehydrating agent, the preparation method comprise the following steps：
（1）It is 7 in mass ratio:1.5, take vermiculite and iron oxide to be put into calcining furnace, calcining 55min is carried out at 1650 DEG C, receive
Collect calcined material, and be put into ball mill, ball milling 1.5h is carried out with 800r/min, crosses 200 mesh sieves, collect sieving particle；
（2）It is 1 in mass ratio:4, sieving particle is put into container with 1.2mol/L sodium hydroxide solutions and is stirred, is stood
40min, salt acid for adjusting pH is reused to neutrality, filtering, filter residue is collected, using water washing filter residue until cleaning solution is received into neutrality
Filter residue after collection washing；
（3）Count in parts by weight, take filter residue, 18 parts of acrylamides, 13 parts of acrylyl oxy-ethyls three after 70 parts of water, 35 parts of washings
Ammonio methacrylate, 4 parts of Peracetic acid, 2 parts of sodium chlorate, 0.7 part of initiator and 0.7 part of dodecyl sodium sulfate；
（4）Filter residue, sodium chlorate, Peracetic acid and the dodecyl sodium sulfate after water, washing are put into reactor first, 43
2.5h is stirred at DEG C, it is 6.5 to keep the pH of material in reactor using sodium hydroxide solution, then adds acrylamide, propylene
Acyloxyethyl trimethyl ammonium chloride, is protected using nitrogen, is warming up to 83 DEG C, carries out preheating 23min, adds initiator, heating
To 100 DEG C, 4h is reacted, is cooled to room temperature, 1.5h is stood, discharging, collects out material, and is spray-dried, dried object is collected, produces
Sludge dehydrating agent.
Example 2
The selection of initiator：Ammonium persulfate.
A kind of preparation method of sludge dehydrating agent, the preparation method comprise the following steps：
（1）It is 7 in mass ratio:1.5, take vermiculite and iron oxide to be put into calcining furnace, calcining 55min is carried out at 1600 DEG C, receive
Collect calcined material, and be put into ball mill, ball milling 2h is carried out with 800r/min, crosses 200 mesh sieves, collect sieving particle；
（2）It is 1 in mass ratio:4, sieving particle is put into container with 1.2mol/L sodium hydroxide solutions and is stirred, is stood
70min, salt acid for adjusting pH is reused to neutrality, filtering, filter residue is collected, using water washing filter residue until cleaning solution is received into neutrality
Filter residue after collection washing；
（3）Count in parts by weight, take filter residue, 20 parts of acrylamides, 15 parts of acrylyl oxy-ethyls three after 80 parts of water, 40 parts of washings
Ammonio methacrylate, 5 parts of Peracetic acid, 3 parts of sodium chlorate, 0.8 part of initiator and 0.9 part of dodecyl sodium sulfate；
（4）Filter residue, sodium chlorate, Peracetic acid and the dodecyl sodium sulfate after water, washing are put into reactor first, 45
3h is stirred at DEG C, it is 6.5 to keep the pH of material in reactor using sodium hydroxide solution, then adds acrylamide, acryloyl
Oxy-ethyl-trimethyl salmiac, protected using nitrogen, be warming up to 85 DEG C, carried out preheating 25min, add initiator, be warming up to
105 DEG C, 5h is reacted, is cooled to room temperature, 2h is stood, discharging, collects out material, and is spray-dried, dried object is collected, produces sludge
Dehydrating agent.
Example 3
The selection of initiator：Ammonium persulfate.
A kind of preparation method of sludge dehydrating agent, the preparation method comprise the following steps：
（1）It is 7 in mass ratio:1, take vermiculite and iron oxide to be put into calcining furnace, calcining 50min is carried out at 1700 DEG C, collect
Calcined material, and be put into ball mill, ball milling 1h is carried out with 800r/min, crosses 200 mesh sieves, collects sieving particle；
（2）It is 1 in mass ratio:3, sieving particle is put into container with 1.2mol/L sodium hydroxide solutions and is stirred, is stood
35min, salt acid for adjusting pH is reused to neutrality, filtering, filter residue is collected, using water washing filter residue until cleaning solution is received into neutrality
Filter residue after collection washing；
（3）Count in parts by weight, take filter residue, 15 parts of acrylamides, 10 parts of acrylyl oxy-ethyls three after 50 parts of water, 30 parts of washings
Ammonio methacrylate, 3 parts of Peracetic acid, 1 part of sodium chlorate, 0.6 part of initiator and 0.5 part of dodecyl sodium sulfate；
（4）Filter residue, sodium chlorate, Peracetic acid and the dodecyl sodium sulfate after water, washing are put into reactor first, 40
2h is stirred at DEG C, it is 6.0 to keep the pH of material in reactor using sodium hydroxide solution, then adds acrylamide, acryloyl
Oxy-ethyl-trimethyl salmiac, protected using nitrogen, be warming up to 80 DEG C, carried out preheating 20min, add initiator, be warming up to
95 DEG C, 3h is reacted, is cooled to room temperature, 1h is stood, discharging, collects out material, and is spray-dried, dried object is collected, produces sludge
Dehydrating agent.
Reference examples：The sludge dehydrating agent of company of Gongyi City production.
The sludge dehydrating agent of sludge dehydrating agent obtained by examples detailed above and reference examples is detected, specific detection is as follows：
The sludge dehydrating agent of sludge dehydrating agent made from above-described embodiment and reference examples is respectively applied to certain municipal sewage treatment
Factory's sludge to be drained off:Moisture content 96%~98%, pH value 6.8, dosage 40mg/l, record data after 2 days, treatment effect are shown in
Table 1.
Summary, sewage dehydrating agent dehydrating effect of the invention is good and corrosive equipment, the dehydrating agent of preparation do not have
Good environment friendly, is worthy to be popularized.
Claims (4)
1. a kind of preparation method of sludge dehydrating agent, it is characterised in that the preparation method comprises the following steps：
（1）Take vermiculite and iron oxide to be put into calcining furnace and calcined, collect calcined material, and carry out ball milling, sieve, collect sieving
Particle；
（2）Sieving particle is put into container with sodium hydroxide solution and is stirred, standing, using salt acid for adjusting pH to neutrality,
Filtering, filter residue is collected, using water washing filter residue until cleaning solution collects the filter residue after washing into neutrality；
（3）Count in parts by weight, take the filter residue after 50~80 parts of water, 30~40 parts of washings, 15~20 parts of acrylamides, 10~15
Part acrylyl oxy-ethyl-trimethyl salmiac, 3~5 parts of Peracetic acid, 1~3 part of sodium chlorate, 0.6~0.8 part of initiator and 0.5
~0.9 part of dodecyl sodium sulfate；
（4）Filter residue, sodium chlorate, Peracetic acid and the dodecyl sodium sulfate after water, washing are put into reactor first, 40
Stirred at~45 DEG C, the pH that the material in reactor is kept using sodium hydroxide solution is 6.0~6.5, then adds acryloyl
Amine, acrylyl oxy-ethyl-trimethyl salmiac, are protected using nitrogen, are warming up to 80~85 DEG C, are preheated, and add initiation
Agent, 95~105 DEG C are warming up to, reaction, is cooled to room temperature, is stood, discharging, collects out material, and be spray-dried, collect drying
Thing, produce sludge dehydrating agent.
2. the preparation method of sludge dehydrating agent according to claim 1, it is characterised in that the step（1）Middle vermiculite and oxygen
The mass ratio for changing iron is 7:1~2.
3. the preparation method of sludge dehydrating agent according to claim 1, it is characterised in that the step（2）Middle sieving particle
Mass ratio with sodium hydroxide solution is 1:3~5.
4. the preparation method of sludge dehydrating agent according to claim 1, it is characterised in that the step（3）Middle initiator is
Any one in ammonium persulfate, benzoyl peroxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710873822.4A CN107459250A (en) | 2017-09-25 | 2017-09-25 | A kind of preparation method of sewage dehydrating agent |
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| CN201710873822.4A CN107459250A (en) | 2017-09-25 | 2017-09-25 | A kind of preparation method of sewage dehydrating agent |
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| CN107459250A true CN107459250A (en) | 2017-12-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111960646A (en) * | 2020-09-23 | 2020-11-20 | 吴根花 | Preparation method of sludge dewatering flocculant suitable for large-scale sewage treatment plant |
| CN115254025A (en) * | 2022-08-19 | 2022-11-01 | 常州大学 | Preparation method of printing and dyeing sludge dehydrating agent and method for conditioning printing and dyeing sludge by using printing and dyeing sludge dehydrating agent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111960646A (en) * | 2020-09-23 | 2020-11-20 | 吴根花 | Preparation method of sludge dewatering flocculant suitable for large-scale sewage treatment plant |
| CN115254025A (en) * | 2022-08-19 | 2022-11-01 | 常州大学 | Preparation method of printing and dyeing sludge dehydrating agent and method for conditioning printing and dyeing sludge by using printing and dyeing sludge dehydrating agent |
| CN115254025B (en) * | 2022-08-19 | 2024-04-05 | 常州大学 | Preparation method of printing and dyeing sludge dehydrating agent and method for conditioning printing and dyeing sludge by using same |
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Application publication date: 20171212 |
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