CN112807754A - Defoaming agent for eliminating foam in wastewater aerobic activated sludge tank and preparation method thereof - Google Patents
Defoaming agent for eliminating foam in wastewater aerobic activated sludge tank and preparation method thereof Download PDFInfo
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- CN112807754A CN112807754A CN202011445700.3A CN202011445700A CN112807754A CN 112807754 A CN112807754 A CN 112807754A CN 202011445700 A CN202011445700 A CN 202011445700A CN 112807754 A CN112807754 A CN 112807754A
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- foam
- agent
- defoaming agent
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- activated sludge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
- B01D19/0409—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing Si-atoms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
Abstract
The invention discloses a defoaming agent for eliminating foam in a wastewater aerobic activated sludge tank and a preparation method thereof, wherein the defoaming agent comprises the following raw materials in parts by weight: 40-55% of polyether modified silicone oil; 10-15% of emulsifier; 10-20% by mass of a carrier; 5-10% of curing agent; 10-20% of deionized water by mass; 4 to 5 mass percent of stabilizer and 5 to 6 mass percent of dispersant. The defoaming agent prepared by the invention can be quickly dispersed in water, is dissolved in water, does not float oil, has high defoaming speed and lasting foam inhibition, does not change the oxygen content of water quality, avoids secondary pollution of water, has good alkali resistance and foam inhibition, can exert excellent defoaming effect with very small addition amount, and can well inhibit the regeneration of foam.
Description
Technical Field
The invention relates to the technical field of defoaming agents, in particular to a defoaming agent for eliminating foam in a wastewater aerobic activated sludge tank and a preparation method thereof.
Background
The general process flow of the oil refining wastewater is as follows: oil separation tank → flotation tank → aerobic activated sludge tank → contact oxidation tank → rear flotation tank → total discharge. The aerobic activated sludge tank often generates more foams in the operation process, the subsequent contact oxidation tank also has the problem of foams, the generation of the foams seriously influences the treatment effect of wastewater, the used polyether defoamer has the greatest advantage of strong foam inhibition capability, but has the fatal defect of low foam breaking rate, once a large amount of foams are generated, the defoamer cannot be effectively extinguished at once, and a certain amount of defoamer is required to be added to have good defoaming and foam inhibition capabilities.
At present, the existing antifoaming agents for eliminating the foam in the wastewater aerobic activated sludge tank have some defects, for example; the existing defoaming agent for eliminating the foam in the wastewater aerobic activated sludge pool has the defects of low dispersion speed in water, easy floating oil development, full defoaming speed, short foam inhibition time, easy change of the oxygen content of water quality and secondary pollution of a water body, general alkali resistance and poor foam inhibition performance, and can exert excellent defoaming effect by adding a large amount of defoaming agent.
Disclosure of Invention
The invention aims to provide a defoaming agent for eliminating foam in a wastewater aerobic activated sludge tank and a preparation method thereof, and solves the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a defoaming agent for eliminating foam in a wastewater aerobic activated sludge tank and a preparation method thereof comprise the following raw materials in parts by weight: 40-55% of polyether modified silicone oil; 10-15% of emulsifier; 10-20% by mass of a carrier; 5-10% of curing agent; 10-20% of deionized water by mass; 4 to 5 mass percent of stabilizer and 5 to 6 mass percent of dispersant.
In a preferred embodiment of the invention, the defoaming agent for eliminating foam in the wastewater aerobic activated sludge tank comprises the following raw materials in parts by weight: 40% of polyether modified silicone oil; 10% of emulsifier; 20% of a carrier by mass; 5% of curing agent; 15% of deionized water by mass; 5 mass percent of stabilizer and 5 mass percent of dispersant.
In a preferred embodiment of the invention, the defoaming agent for eliminating foam in the wastewater aerobic activated sludge tank comprises the following raw materials in parts by weight: 55 mass percent of polyether modified silicone oil; 10% of emulsifier; 10% of a carrier by mass; 5% of curing agent; deionized water is 10% by mass; 5 mass percent of stabilizer and 5 mass percent of dispersant.
In a preferred embodiment of the invention, the preparation method of the antifoaming agent for eliminating foam in the wastewater aerobic activated sludge tank comprises the following steps:
a. weighing the raw materials in parts by weight;
b. after the step a is finished, adding the polyether modified silicone oil and the carrier into the mixer, and adding a proper amount of deionized water into the mixer for mixing to obtain a mixed solution A;
c. after the step b is finished, adding an emulsifier, a curing agent, a stabilizer and a dispersant into the mixed solution A for mixing to prepare a defoaming agent;
d. after the step c is finished, placing the prepared defoaming agent into a container for standing and cooling;
e. and d, after the step d is finished, removing surface foam of the standing and cooled defoaming agent, and then filling the defoaming agent into a packaging barrel for sealing.
In a preferred embodiment of the present invention, the polyether-modified silicone oil comprises a main component of polyether and dimethyl siloxane, the emulsifier comprises one or more of sodium stearate, sodium dodecyl sulfate and calcium dodecyl benzene sulfonate, the stabilizer comprises one or more of phosphites, epoxy compounds and polyols, and the dispersant comprises one or more of phenolic resin, ethyl acetate, propylene glycol block polyester, propylene glycol block polyether and propylene glycol block polyester.
In a preferred embodiment of the present invention, in the step b, the polyether modified silicone oil and the carrier are added into a mixer, and then an appropriate amount of deionized water is added into the mixer for mixing, wherein the rotation speed of the mixer during mixing is 500-700 r/min, the mixing time is 30-45 min, and the mixing temperature is 40-50 ℃.
In a preferred embodiment of the present invention, in the step c, the emulsifier, the curing agent, the stabilizer and the dispersant are added into the mixed solution A for mixing, wherein the rotation speed of the mixer during mixing is 800-1100 r/min, the mixing time is 1-2 h, and the mixing temperature is 55-70 ℃.
In the step e, after removing the surface foam of the defoaming agent after standing and cooling, the defoaming agent is put into a packaging barrel for sealing, and when removing the surface foam of the defoaming agent, an operator can directly use a strainer to take out the foam on the surface of the defoaming agent.
Compared with the prior art, the invention has the following beneficial effects:
the defoaming agent prepared by the invention can be quickly dispersed in water, is dissolved in water, does not float oil, has high defoaming speed and lasting foam inhibition, does not change the oxygen content of water quality, avoids secondary pollution of water, has good alkali resistance and foam inhibition, can exert excellent defoaming effect with very small addition amount, and can well inhibit the regeneration of foam.
Detailed Description
Technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
The invention provides a technical scheme that: a defoaming agent for eliminating foam in a wastewater aerobic activated sludge tank and a preparation method thereof comprise the following raw materials in parts by weight: 40-55% of polyether modified silicone oil; 10-15% of emulsifier; 10-20% by mass of a carrier; 5-10% of curing agent; 10-20% of deionized water by mass; 4 to 5 mass percent of stabilizer and 5 to 6 mass percent of dispersant.
Further, the defoaming agent for eliminating the foam in the wastewater aerobic activated sludge tank comprises the following raw materials in parts by weight: 40% of polyether modified silicone oil; 10% of emulsifier; 20% of a carrier by mass; 5% of curing agent; 15% of deionized water by mass; 5 mass percent of stabilizer and 5 mass percent of dispersant.
Further, the defoaming agent for eliminating the foam in the wastewater aerobic activated sludge tank comprises the following raw materials in parts by weight: 55 mass percent of polyether modified silicone oil; 10% of emulsifier; 10% of a carrier by mass; 5% of curing agent; deionized water is 10% by mass; 5 mass percent of stabilizer and 5 mass percent of dispersant.
Further, the preparation method of the defoaming agent for eliminating the foam in the wastewater aerobic activated sludge tank comprises the following preparation steps:
a. weighing the raw materials in parts by weight;
b. after the step a is finished, adding the polyether modified silicone oil and the carrier into the mixer, and adding a proper amount of deionized water into the mixer for mixing to obtain a mixed solution A;
c. after the step b is finished, adding an emulsifier, a curing agent, a stabilizer and a dispersant into the mixed solution A for mixing to prepare a defoaming agent;
d. after the step c is finished, placing the prepared defoaming agent into a container for standing and cooling;
e. and d, after the step d is finished, removing surface foam of the standing and cooled defoaming agent, and then filling the defoaming agent into a packaging barrel for sealing.
Further, the main components of the polyether modified silicone oil are polyether and dimethyl siloxane, the main component of the emulsifier is one or more than two of sodium stearate, sodium dodecyl sulfate and calcium dodecyl benzene sulfonate, the main component of the stabilizer is one or more than two of phosphite esters, epoxy compounds and polyhydric alcohols, and the main component of the dispersing agent is one or more than two of phenolic resin, ethyl acetate, propylene glycol block polyester, propylene glycol block polyether and propylene glycol block polyester.
Further, in the step b, the polyether modified silicone oil and the carrier are added into a mixer, and then a proper amount of deionized water is added into the mixer for mixing, wherein the rotating speed of the mixer is 500-700 r/min during mixing, the mixing time is 30-45 min, and the mixing temperature is 40-50 ℃.
Further, in the step c, the emulsifier, the curing agent, the stabilizer and the dispersant are added into the mixed solution A for mixing, the rotating speed of a mixer during mixing is 800-1100 r/min, the mixing time is 1-2 h, and the mixing temperature is 55-70 ℃.
And furthermore, after removing surface foam from the standing and cooled defoaming agent in the step e, putting the defoaming agent into a packaging barrel for sealing, and when removing the surface foam from the defoaming agent, an operator can directly use a strainer to take out the foam on the surface of the defoaming agent.
Example one
The defoaming agent for eliminating the foam in the wastewater aerobic activated sludge tank comprises the following raw materials in parts by weight: 40% of polyether modified silicone oil; 10% of emulsifier; 20% of a carrier by mass; 5% of curing agent; 15% of deionized water by mass; 5 mass percent of stabilizer and 5 mass percent of dispersant.
The preparation steps are as follows:
a. weighing the raw materials in parts by weight;
b. after the step a is finished, adding the polyether modified silicone oil and the carrier into the mixer, and adding a proper amount of deionized water into the mixer for mixing to obtain a mixed solution A;
c. after the step b is finished, adding an emulsifier, a curing agent, a stabilizer and a dispersant into the mixed solution A for mixing to prepare a defoaming agent;
d. after the step c is finished, placing the prepared defoaming agent into a container for standing and cooling;
e. and d, after the step d is finished, removing surface foam of the standing and cooled defoaming agent, and then filling the defoaming agent into a packaging barrel for sealing.
Example two
The defoaming agent for eliminating the foam in the wastewater aerobic activated sludge tank comprises the following raw materials in parts by weight: 55 mass percent of polyether modified silicone oil; 10% of emulsifier; 10% of a carrier by mass; 5% of curing agent; deionized water is 10% by mass; 5 mass percent of stabilizer and 5 mass percent of dispersant.
The preparation steps are as follows:
a. weighing the raw materials in parts by weight;
b. after the step a is finished, adding the polyether modified silicone oil and the carrier into the mixer, and adding a proper amount of deionized water into the mixer for mixing to obtain a mixed solution A;
c. after the step b is finished, adding an emulsifier, a curing agent, a stabilizer and a dispersant into the mixed solution A for mixing to prepare a defoaming agent;
d. after the step c is finished, placing the prepared defoaming agent into a container for standing and cooling;
e. and d, after the step d is finished, removing surface foam of the standing and cooled defoaming agent, and then filling the defoaming agent into a packaging barrel for sealing.
Conventional antifoam data parameters table 1 is as follows:
| test items | Speed of dispersion | Defoaming speed | Alkali resistance | Foam inhibition |
| Parameter index | Is slower | In general | Is weaker | Is poor |
Example-antifoam data parameters table 2 is as follows:
| test items | Speed of dispersion | Defoaming speed | Alkali resistance | Foam inhibition |
| Parameter index | Is quicker | Good effect | In general | Is preferably used |
Example two antifoam data parameters table 3 is as follows:
| test items | Speed of dispersion | Defoaming speed | Alkali resistance | Foam inhibition |
| Parameter index | Fast-acting toy | Superior food | High strength | Good taste |
In summary, the data in tables 1, 2 and 3 are compared to obtain that the defoaming agent prepared by the invention can be rapidly dispersed in water, is dissolved in water, does not float oil, has high defoaming speed and lasting foam inhibition, does not change the oxygen content of water quality, avoids secondary pollution of water, has good alkali resistance and foam inhibition, can exert excellent defoaming effect with very small addition amount, and can well inhibit the regeneration of foam.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The defoaming agent for eliminating the foam in the wastewater aerobic activated sludge tank is characterized in that: comprises the following raw materials in parts by weight: 40-55% of polyether modified silicone oil; 10-15% of emulsifier; 10-20% by mass of a carrier; 5-10% of curing agent; 10-20% of deionized water by mass; 4 to 5 mass percent of stabilizer and 5 to 6 mass percent of dispersant.
2. The antifoaming agent for removing foam in an aerobic activated sludge tank of wastewater according to claim 1, wherein: comprises the following raw materials in parts by weight: 40% of polyether modified silicone oil; 10% of emulsifier; 20% of a carrier by mass; 5% of curing agent; 15% of deionized water by mass; 5 mass percent of stabilizer and 5 mass percent of dispersant.
3. The antifoaming agent for removing foam in an aerobic activated sludge tank of wastewater according to claim 1, wherein: comprises the following raw materials in parts by weight: 55 mass percent of polyether modified silicone oil; 10% of emulsifier; 10% of a carrier by mass; 5% of curing agent; deionized water is 10% by mass; 5 mass percent of stabilizer and 5 mass percent of dispersant.
4. The method for preparing the antifoaming agent for removing the foam in the wastewater aerobic activated sludge tank according to claim 1, wherein the antifoaming agent comprises: the preparation steps are as follows:
a. weighing the raw materials in parts by weight;
b. after the step a is finished, adding the polyether modified silicone oil and the carrier into the mixer, and adding a proper amount of deionized water into the mixer for mixing to obtain a mixed solution A;
c. after the step b is finished, adding an emulsifier, a curing agent, a stabilizer and a dispersant into the mixed solution A for mixing to prepare a defoaming agent;
d. after the step c is finished, placing the prepared defoaming agent into a container for standing and cooling;
e. and d, after the step d is finished, removing surface foam of the standing and cooled defoaming agent, and then filling the defoaming agent into a packaging barrel for sealing.
5. The method for preparing the antifoaming agent for removing the foam in the wastewater aerobic activated sludge tank according to claim 1, wherein the antifoaming agent comprises: the main components of the polyether modified silicone oil are polyether and dimethyl siloxane, the main component of the emulsifier is one or more than two of sodium stearate, sodium dodecyl sulfate and calcium dodecyl benzene sulfonate, the main component of the stabilizer is one or more than two of phosphite esters, epoxy compounds and polyhydric alcohols, and the main component of the dispersing agent is one or more than two of phenolic resin, ethyl acetate, propylene glycol block polyester, propylene glycol block polyether and propylene glycol block polyester.
6. The method for preparing the antifoaming agent for removing the foam in the wastewater aerobic activated sludge tank according to claim 4, wherein the antifoaming agent comprises: and b, adding the polyether modified silicone oil and the carrier into a mixer, adding a proper amount of deionized water into the mixer, and mixing at a rotating speed of 500-700 r/min for 30-45 min at a temperature of 40-50 ℃.
7. The method for preparing the antifoaming agent for removing the foam in the wastewater aerobic activated sludge tank according to claim 4, wherein the antifoaming agent comprises: and c, adding the emulsifier, the curing agent, the stabilizer and the dispersing agent into the mixed solution A for mixing, wherein the rotating speed of a mixer during mixing is 800-1100 r/min, the mixing time is 1-2 h, and the mixing temperature is 55-70 ℃.
8. The method for preparing the antifoaming agent for removing the foam in the wastewater aerobic activated sludge tank according to claim 4, wherein the antifoaming agent comprises: and e, removing surface foam of the defoaming agent after standing and cooling, putting the defoaming agent into a packaging barrel for sealing, and taking out the foam on the surface of the defoaming agent by using a strainer directly by an operator when the defoaming agent is used for removing the surface foam.
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