CN109851020A - Waste water treating agent and preparation method thereof and wastewater treatment method - Google Patents
Waste water treating agent and preparation method thereof and wastewater treatment method Download PDFInfo
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Abstract
The present invention relates to a kind of waste water treating agent and preparation method thereof and wastewater treatment methods.Above-mentioned waste water treating agent includes calcium salt, white carbon black and chelating agent, wherein the mass ratio of calcium salt, white carbon black and chelating agent is (80~150): (80~150): 1.Three kinds of substances in above-mentioned waste water treating agent cooperate, and the waste water after single treatment can be made up to standard maintains the stabilization of pH and fluorinion concentration in a long time, so as to long period placement.
Description
Technical field
The present invention relates to field of waste water treatment, more particularly to a kind of waste water treating agent and preparation method thereof and wastewater treatment
Method.
Background technique
Qualified discharge after the single treatments such as fluorine-containing acid waste water is neutralized, flocculation, but it is up to standard after draining with the time
It elapses, some existing chemical reactions, which will be slow, in water continues, and causes waste water different degrees of acid occur and falls (i.e. under pH value
Drop) and fluorine return (i.e. fluorinion concentration raising) phenomenon so that the waste water after single treatment is up to standard cannot be placed for a long time.
Summary of the invention
Based on this, it is necessary to provide it is a kind of make that fluorine-containing acid waste water can place the long period after single treatment it is useless
Water treatment agent.
In addition, also providing the preparation method and wastewater treatment method of a kind of waste water treating agent.
A kind of waste water treating agent, including calcium salt, white carbon black and chelating agent, wherein the calcium salt, the white carbon black and described
The mass ratio of chelating agent is (80~150): (80~150): 1.
The calcium salt is selected from least one of calcium dihydrogen phosphate and calcium carbonate in one of the embodiments,.
The chelating agent is selected from disodium ethylene diamine tetraacetate, sodium potassium tartrate tetrahydrate and citric acid in one of the embodiments,
At least one of calcium.
The specific surface area of the white carbon black is 200m in one of the embodiments,2/ g~300m2/g。
The mass ratio of the calcium salt, the white carbon black and the chelating agent is 100: 100 in one of the embodiments:
1。
A kind of preparation method of waste water treating agent, including by calcium salt, white carbon black and chelating agent be in mass ratio (80~150)
: (80~150): 1 mixing obtains the waste water treating agent.
A kind of wastewater treatment method, including waste water treating agent is added into waste water to be processed, wherein the waste water treating agent
Including calcium salt, white carbon black and chelating agent, and the mass ratio of the calcium salt, the white carbon black and the chelating agent is (80~150):
(80~150): 1.
Described the step of waste water treating agent is added into waste water to be processed, includes: in one of the embodiments,
The waste water treating agent is dispersed in water, treatment fluid is obtained；And
The treatment fluid is added in the waste water to be processed.
The mass concentration of waste water treating agent described in the treatment fluid is 10%~12% in one of the embodiments,.
The additional amount of the waste water treating agent is the quality of the waste water to be processed in one of the embodiments,
0.3%~0.5%.
Above-mentioned waste water treating agent includes calcium salt, white carbon black and chelating agent, wherein the calcium ion energy that calcium salt ionizes out in water
It is enough to be reacted with fluorine ion, to reduce the concentration of fluorine ion；The main component of white carbon black be nanoscale silica, have compared with
Big specific surface area can reduce the concentration of fluorine ion in water by chemisorption；Chelating agent can be with metal big in water
Ion (such as Fe3+) combine, discharge OH-Ion and slow down pH decline, while chelating agent is also a kind of dispersing agent, can be made above-mentioned useless
Water treatment agent is more well-dispersed in waste water.Therefore, three kinds of substances in above-mentioned waste water treating agent cooperate, and can make primary
Handle it is up to standard after waste water maintain the stabilization of pH and fluorinion concentration in a long time, so as to long period placement.
The experiment proved that through above-mentioned waste water treating agent treated waste water at least 30 days fluorinion concentration in 10ppm
Hereinafter, pH is 6.4 or so.
Detailed description of the invention
Fig. 1 is the flow chart of the wastewater treatment method of an embodiment；
Fig. 2 is processed waste water in embodiment 1 and comparative example 1 through the pH change curve in 30 days placement process；
Fig. 3 is variation of the processed waste water through the fluorinion concentration in 30 days placement process in embodiment 1 and comparative example 1
Curve.
Specific embodiment
To facilitate the understanding of the present invention, below in conjunction with specific embodiment to invention is more fully described.Tool
Preferred embodiment of the invention is given in body embodiment.But the invention can be realized in many different forms,
It is not limited to the examples described herein.On the contrary, purpose of providing these embodiments is makes to the disclosure
Understanding it is more thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
Body embodiment purpose, it is not intended that in limitation the present invention.
The waste water treating agent of one embodiment includes calcium salt, white carbon black and chelating agent.Specifically, calcium in waste water treating agent
The mass ratio of salt, white carbon black and chelating agent is (80~150): (80~150): 1.
Wherein, calcium salt is selected from least one of calcium dihydrogen phosphate and calcium carbonate.White carbon black is nano-scale white carbon black.Hard charcoal
Black specific surface area is 200m2/ g~300m2/g(HT3).Chelating agent is selected from disodium ethylene diamine tetraacetate (EDTA-2Na), winestone
At least one of sour potassium sodium and calcium citrate.
Further, the mass ratio of calcium salt, white carbon black and chelating agent is 100: 100: 1 in waste water treating agent.
Using above-mentioned waste water treating agent can be used in handling single treatment it is up to standard after fluorine-containing acid waste water, and can make
The passage not at any time of the fluorinion concentration and pH of fluorine-containing acid waste water and be widely varied.Wherein, calcium salt is weak acid
Salt, is a kind of pH buffer, and it is 6~9 that balancing alkalinity acidity, which is stablized in pH, and the calcium ion that ionizes in water of calcium salt and fluorine ion are anti-
It answers, to reduce the concentration of fluorine ion.The main component of white carbon black is the biggish silica of specific surface area, passes through chemisorption
Effect, can reduce the concentration of fluorine ion in water.Chelating agent mainly and metal ion (such as Fe big in water3+) combine, discharge OH-
Ion and slow down pH decline, while chelating agent is also a kind of dispersing agent, is well-dispersed in above-mentioned waste water treating agent more in waste water.
Above-mentioned waste water treating agent has at least the following advantages:
(1) above-mentioned waste water treating agent utilizes the synergistic effect of calcium salt, white carbon black and chelating agent, so that above-mentioned waste water treating agent
Fluorine ion in waste water and pH long period after single treatment can be made up to standard maintain achievement level without rebounding.
(2) cost of material of above-mentioned waste water treating agent is low, and it is up to standard using above-mentioned waste water treating agent to be added to single treatment
In waste water afterwards, secondary treatment is avoided, has saved the costs such as place, equipment, the artificial operation of secondary treatment investment.
(3) requirement of above-mentioned waste water treating agent treated waste water can satisfy environmental protection, avoids the pollution to environment.
The preparation method of the waste water treating agent of one embodiment includes the following steps: by calcium salt, white carbon black and chelating agent
Mass ratio is (80~150): (80~150): 1, calcium salt, white carbon black and chelating agent are weighed respectively, and be uniformly mixed, obtain waste water
Inorganic agent.
The preparation method of above-mentioned waste water treating agent is easy to operate, easily produces in batches.
The wastewater treatment method of one embodiment includes the following steps: that above-mentioned wastewater treatment is added into waste water to be processed
Agent.
Specifically, in above-mentioned waste water treating agent calcium salt, white carbon black and chelating agent additional amount be wastewater quality 0.3%~
0.5%.
Specifically, above-mentioned waste water to be processed is fluorine-containing acid waste water (containing low concentration hydrofluoric acid, hydrochloric acid, sulfuric acid etc.) through medicine
After agent (white lime or liquid alkaline) neutralizes flocculation treatment, pH and fluorinion concentration waste water up to standard are detected.By this waste water after up to standard
Certain density waste water treating agent is added.
Specifically, referring to Fig. 1, the step of above-mentioned waste water treating agent is added into waste water to be processed includes:
Step S110: waste water treating agent is dispersed in water, and obtains treatment fluid.
Wherein, waste water treating agent includes calcium salt, white carbon black and chelating agent.The mass ratio of calcium salt, white carbon black and chelating agent is
(80~150): (80~150): 1.Calcium salt, white carbon black and chelating agent can disperse in a solvent, to obtain treatment fluid.In treatment fluid
The mass concentration of waste water treating agent is 10%~12%.
Further, water is waste water to be processed up to standard after tap water or single treatment.It can be subtracted using waste water to be processed
Few water consumption.
Step S120: treatment fluid is added in waste water to be processed.
Specifically, the waste water treating agent in treatment fluid 0.3%~0.5% is added to wait locate by the quality of waste water to be processed
It manages in waste water.
In the present embodiment, treatment fluid is added in waste water to be processed using pump.It is appreciated that in other embodiment party
In formula, treatment fluid can also be added in waste water to be processed using other modes.
Above-mentioned wastewater treatment method has at least the following advantages:
(1) above-mentioned wastewater treatment method is easy to operate, without adding additional equipment, directly with pump injection wastewater drainage pipe
In mix and can come into force with waste water, without in addition increase mixing apparatus stirring.And avoid new equipment in secondary treatment, new place
Etc. brings production cost.
(2) above-mentioned wastewater treatment method can make fluorine-containing acid waste water keep pH and fluorine in waste water in a long time
Ion concentration avoids pollution environment in state up to standard.The experiment proved that in a long time, the pH value of waste water maintains 6.4
Left and right, fluorinion concentration is in 10ppm or less.
The following are specific embodiment parts:
Embodiment 1
The starting pH in waste water after single treatment in the present embodiment is up to standard is 7.0, and starting fluorinion concentration is
7.5ppm。
Calcium salt calcium carbonate, white carbon black and chelating agent EDTA-2Na that mass ratio is 100: 100: 1 are dispersed in water, obtained
The treatment fluid that the mass concentration of waste water treating agent is 10%.
By above-mentioned treatment fluid by the waste water treating agent in treatment fluid be wastewater flow rate 0.5% be added to single treatment it is up to standard after
Waste water in.
Embodiment 2
The starting pH in waste water after single treatment in the present embodiment is up to standard is 7.0, and starting fluorinion concentration is
7.5ppm。
Calcium salt calcium carbonate, white carbon black and chelating agent EDTA-2Na that mass ratio is 100: 100: 1 are dispersed in water, obtained
The treatment fluid that the mass concentration of waste water treating agent is 10%.
By above-mentioned treatment fluid by the waste water treating agent in treatment fluid be wastewater flow rate 0.4% be added to single treatment it is up to standard after
Waste water in.
Embodiment 3
The starting pH in waste water after single treatment in the present embodiment is up to standard is 7.0, and starting fluorinion concentration is
7.5ppm。
Calcium salt calcium carbonate, white carbon black and chelating agent EDTA-2Na that mass ratio is 100: 100: 1 are dispersed in water, obtained
The treatment fluid that the mass concentration of waste water treating agent is 10%.
By above-mentioned treatment fluid by the waste water treating agent in treatment fluid be wastewater flow rate 0.3% be added to single treatment it is up to standard after
Waste water in.
Embodiment 4
The starting pH in waste water after single treatment in the present embodiment is up to standard is 7.0, and starting fluorinion concentration is
7.5ppm。
Calcium salt, white carbon black and chelating agent that mass ratio is 100: 100: 1 are dispersed in water, wherein calcium salt is mass ratio 1:
1 calcium carbonate and the mixture of calcium dihydrogen phosphate, chelating agent are the mixing of EDTA-2Na and calcium citrate that mass ratio is 1: 1
Object obtains the treatment fluid that the mass concentration of waste water treating agent is 10%.
By above-mentioned treatment fluid by the waste water treating agent in treatment fluid be wastewater flow rate 0.3% be added to single treatment it is up to standard after
Waste water in.
Embodiment 5
The starting pH in waste water after single treatment in the present embodiment is up to standard is 7.0, and starting fluorinion concentration is
7.5ppm。
Calcium salt calcium carbonate, white carbon black and chelating agent sodium potassium tartrate tetrahydrate that mass ratio is 80: 80: 1 are dispersed in water, obtained
The treatment fluid that the mass concentration of waste water treating agent is 10%.
By above-mentioned treatment fluid by the waste water treating agent in treatment fluid be wastewater flow rate 0.3% be added to single treatment it is up to standard after
Waste water in.
Embodiment 6
The starting pH in waste water after single treatment in the present embodiment is up to standard is 7.0, and starting fluorinion concentration is
7.5ppm。
Calcium salt calcium carbonate, white carbon black and chelating agent EDTA-2Na that mass ratio is 150: 150: 1 are dispersed in water, obtained
The treatment fluid that the mass concentration of waste water treating agent is 10%.
By above-mentioned treatment fluid by the waste water treating agent in treatment fluid be wastewater flow rate 0.5% be added to single treatment it is up to standard after
Waste water in.
Comparative example 1
The starting pH in waste water after single treatment in this comparative example is up to standard is 7.0, and starting fluorinion concentration is
5.4ppm.Waste water after single treatment in this comparative example is up to standard is without any processing.
Comparative example 2
The starting pH in waste water after single treatment in this comparative example is up to standard is 7.0, and starting fluorinion concentration is
7.5ppm.Waste water treating agent in this comparative example is calcium salt and white carbon black.
Mass ratio is dispersed in water for 100: 100 calcium salt calcium carbonate and white carbon black, obtains the quality of waste water treating agent
The treatment fluid that concentration is 10%.
By above-mentioned treatment fluid by the quality of waste water treating agent be the 0.4% of wastewater flow rate be added to single treatment it is up to standard after it is useless
In water.
Comparative example 3
The starting pH in waste water after single treatment in this comparative example is up to standard is 7.0, and starting fluorinion concentration is
7.5ppm.Waste water treating agent in this comparative example is calcium salt and chelating agent.
Mass ratio is dispersed in water for 100: 1 calcium salt calcium carbonate and chelating agent EDTA-2Na, obtains waste water treating agent
Mass concentration be 10% treatment fluid.
By above-mentioned treatment fluid by the quality of waste water treating agent be the 0.3% of wastewater flow rate be added to single treatment it is up to standard after it is useless
In water.
Comparative example 4
The starting pH in waste water after single treatment in this comparative example is up to standard is 7.0, and starting fluorinion concentration is
7.5ppm.Waste water treating agent in this comparative example is white carbon black and chelating agent.
Mass ratio is dispersed in water for 100: 1 white carbon black and chelating agent EDTA-2Na, obtains the matter of waste water treating agent
Measure the treatment fluid that concentration is 10%.
By above-mentioned treatment fluid by the quality of waste water treating agent be the 0.3% of wastewater flow rate be added to single treatment it is up to standard after it is useless
In water.
By in 1~embodiment of embodiment 6 and 1~comparative example of comparative example 4 through treatment fluid treated waste water every one section when
Between measure its pH value and fluorinion concentration, obtain result shown in following Tables 1 and 2.Wherein, pH value test uses antimony electrode side
The test of method, fluorinion concentration uses fluoride ion electrode method.
The pH tables of data of each embodiment of table 1 and comparative example
| 5min | 5h | 24h | 72h | 8d | 30d | |
| Embodiment 1 | 7.0 | 6.6 | 6.5 | 6.4 | 6.2 | 6.3 |
| Embodiment 2 | 7.0 | 6.7 | 6.6 | 6.4 | 6.2 | 6.3 |
| Embodiment 3 | 7.0 | 6.5 | 6.5 | 6.3 | 6.2 | 6.2 |
| Embodiment 4 | 7.0 | 6.4 | 6.3 | 6.3 | 6.2 | 6.3 |
| Embodiment 5 | 7.0 | 6.8 | 6.6 | 6.4 | 6.2 | 6.2 |
| Embodiment 6 | 7.0 | 6.8 | 6.5 | 6.4 | 6.4 | 6.4 |
| Comparative example 1 | 7.0 | 6.7 | 4.7 | 3.0 | 2.5 | 2.1 |
| Comparative example 2 | 7.0 | 6.8 | 6.0 | 5.3 | 5.1 | 5.1 |
| Comparative example 3 | 7.0 | 6.7 | 6.4 | 6.1 | 6.0 | 6.1 |
| Comparative example 4 | 7.0 | 6.8 | 4.5 | 3.1 | 2.6 | 2.7 |
The tables of data (unit: ppm) of the fluorinion concentration of each embodiment of table 2 and comparative example
As can be seen from Table 1,30 are being placed using treated the waste water of waste water treating agent in 1~embodiment of embodiment 6
After it, pH stable between 6.2~6.4, stablize in 3.2ppm~3.8ppm by fluorinion concentration.And it is not added in comparative example 1
After the waste water of any waste water treating agent is placed 30 days, pH is significantly reduced, and fluorinion concentration dramatically increases.2~comparative example of comparative example 4
In waste water treating agent in only containing any two kinds in calcium salt, white carbon black and chelating agent, through waste water treating agent, that treated is useless
For water after placing 30, at least one in pH value and fluorinion concentration be not up to standard, is unable to direct emission.
The variation of the pH and fluorinion concentration of processed waste water in embodiment 1 and comparative example 1 are depicted as curve, obtained
As shown in Figures 2 and 3.In Fig. 2 more intuitively it can be seen from pH through treatment fluid treated waste water in embodiment 1 at any time
Between change less, pH by 7.0 is down to 6.3 after 30 days place, and in comparative example 1 plus waste water treating agent treated waste water
PH variation is obvious, and pH is down to 2.1 by 7.0 after 30 days place.
In Fig. 3 more intuitively it can be seen from fluorinion concentration through treatment fluid treated waste water in embodiment 1 at any time
Between change it is smaller, through 30 days place after fluorinion concentration by 7.5ppm variation be 3.5ppm, in 10ppm hereinafter, and comparative example 1
In be not added with waste water treating agent, fluorinion concentration changes greatly, through 30 days place after, fluorinion concentration is increased to by 5.4ppm
141.0ppm, fluorinion concentration significantly increase.
Above-mentioned experimental result shows to place through treated the waste water of the waste water treating agent in embodiment in the long period
Fluorinion concentration and pH can maintain state up to standard afterwards, significantly rise or fall without occurring.
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 (10)
1. a kind of waste water treating agent, which is characterized in that including calcium salt, white carbon black and chelating agent, wherein the calcium salt, described white
The mass ratio of carbon black and the chelating agent is (80~150): (80~150): 1.
2. waste water treating agent according to claim 1, which is characterized in that the calcium salt is selected from calcium dihydrogen phosphate and calcium carbonate
At least one of.
3. waste water treating agent according to claim 1, which is characterized in that the chelating agent is selected from ethylenediamine tetra-acetic acid two
At least one of sodium, sodium potassium tartrate tetrahydrate and calcium citrate.
4. waste water treating agent according to claim 1, which is characterized in that the specific surface area of the white carbon black is 200m2/ g~
300m2/g。
5. waste water treating agent according to claim 1, which is characterized in that the calcium salt, the white carbon black and the chelating
The mass ratio of agent is 100: 100: 1.
6. a kind of preparation method of waste water treating agent, which is characterized in that including being in mass ratio by calcium salt, white carbon black and chelating agent
(80~150): (80~150): 1 mixing obtains the waste water treating agent.
7. a kind of wastewater treatment method, which is characterized in that including waste water treating agent is added into waste water to be processed, wherein described
Waste water treating agent includes calcium salt, white carbon black and chelating agent, and the mass ratio of the calcium salt, the white carbon black and the chelating agent is
(80~150): (80~150): 1.
8. wastewater treatment method according to claim 7, which is characterized in that described to be added at waste water into waste water to be processed
Manage agent the step of include:
The waste water treating agent is dispersed in water, treatment fluid is obtained；And
The treatment fluid is added in the waste water to be processed.
9. wastewater treatment method according to claim 8, which is characterized in that waste water treating agent described in the treatment fluid
Mass concentration is 10%~12%.
10. wastewater treatment method according to claim 7, which is characterized in that the additional amount of the waste water treating agent is institute
State the 0.3%~0.5% of the quality of waste water to be processed.
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Application publication date: 20190607 |