CN107585986A - A kind of heavy metal stabilizer and its application method - Google Patents
A kind of heavy metal stabilizer and its application method Download PDFInfo
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- CN107585986A CN107585986A CN201711051921.0A CN201711051921A CN107585986A CN 107585986 A CN107585986 A CN 107585986A CN 201711051921 A CN201711051921 A CN 201711051921A CN 107585986 A CN107585986 A CN 107585986A
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Abstract
The present invention relates to a kind of heavy metal stabilizer and its application method, 5 15 parts of 50 75 parts of modified zeolite, 35 50 parts of quick lime and hydroxycarboxylate metal's chelating agent are contained in the heavy metal stabilizer；The modified zeolite mixes ball processed by high Si-Al zeolite, high-calcium fly ass, rosin, and bakes 1.5h under 380 DEG C of high temperature and be made；Application method is first to adjust the moisture of heavy metal sewage sludge to 35 65%, again by the heavy metal sewage sludge after regulation moisture and heavy metal stabilizer according to 20 25:1 weight reacts 6 8h than mixing under conditions of 30 35 DEG C.The heavy metal stabilizer of the present invention can substantially reduce the anti-molten of heavy metal ion in heavy metal sewage sludge and ooze out concentration.
Description
Technical field
The present invention relates to heavy metal sewage sludge treatment technology, more particularly to a kind of heavy metal stabilizer and its application method.
Background technology
Heavy metal pollution in environment brings very big influence to the quality of life and health of people, especially heavy
The eco-toxicity risk that metal is induced increasingly attracts attention, and wherein electroplating sludge after wastewater treatment in electroplating industry as producing
Raw sludge containing heavy metal discarded object, it is put into National Hazard waste list, as " the final state thing " of electroplating wastewater, although its amount
Much less is wanted than waste water, but because the heavy metals such as cu, Ni, cr, zn, Fe in waste water are transferred in sludge, from certain meaning
Said in justice, harm of the electroplated heavy metals sludge to environment is more serious than electroplating wastewater.If this harmfulness is greatly electroplated
Sludge does not make any disposal, and its destruction to ecological environment is self-evident.At present, relatively conventional processing method is to weight
Stabilizer is added in metal sludge to form insoluble or sl. sol. heavy metal precipitation, traditional stabilizer it is more based on zeolite powder,
The addition auxiliary material such as metal chloride or metal oxide is made, and the dosage of stabilizer is big in processing procedure, cost is high, and outside
When portion's environment changes heavy metal ion easily ooze out, stablizing effect it is general.
The content of the invention
In order to solve the above-mentioned technical problem, there is provided a kind of dosage is small, cost is low, the heavy metal stabilizer of abundant raw materials and
Its application method, the present invention provide following technical scheme：
A kind of heavy metal stabilizer, contain modified zeolite 50-75 parts, quick lime 35-50 parts and hydroxycarboxylate metal chela
Mixture 5-15 parts；The modified zeolite is mixed ball processed, and dried under 380 DEG C of high temperature by high Si-Al zeolite, high-calcium fly ass, rosin
1.5h processed is made.
Modified zeolite in the present invention uses the method for mixing and baking with flyash and rosin, on the one hand passes through flyash
Addition can reduce the cost of stabilizer, and another aspect high-calcium fly ass can promote alkali pasc reaction, later stage in hydration reaction
Reaction rate can be greatly improved so as to shorten the reaction time when adding in heavy metal sewage sludge；Simultaneously as rosin contains double bond
And carboxyl, there is stronger reactivity, be advantageous to during high temperature modified shorten baking time, reduce baked temperature so as to
Modification cost is reduced, meanwhile, carboxyl and hydroxycarboxylate metal's ion chelating agent in rosin are mixed into energy after sludge in the later stage
Slow esterification enough occurs, so as to further shorten stable processing time, greatly improve treatment effeciency；And quick lime plus
Enter, be to improve reaction temperature, promote esterification reaction rate.
Further, the high Si-Al zeolite, high-calcium fly ass, the mixing ratio of rosin are 50:30:2, due to rosin into
This of a relatively high and addition excessively easily bonds stabilizer, therefore addition is less.
Further, hydroxycarboxylate metal's chelating agent is sodium gluconate.Sodium gluconate is a kind of good complete
Energy chelating agent, has good sequestering power to various metals ion.
Further, comprise the following steps：
S1, the moisture in pending heavy metal sewage sludge adjusted to 35-65%, if the moisture in heavy metal sewage sludge
Content is very few, then modified zeolite hydration reaction rate reduction, is unfavorable for improving the efficiency of stabilizer treatment；
S2, by S1 adjust moisture after heavy metal sewage sludge and heavy metal stabilizer according to 20-25:1 weight ratio mixing,
6-8h is reacted under conditions of 30-35 DEG C, because the heavy metal stabilizer of the present invention has efficient, swift advantage, therefore
Addition and processing time greatly shorten, and experiment proves heavy metal sewage sludge and heavy metal stabilizer ratio in 20-25:When 1, weight
Metal ion to ooze out concentration minimum.
The beneficial effects of the present invention are：
(1), by the modification of zeolite reduce heavy metal stabilizer adding proportion, so as to reduce stabilizer into
This；
(2), the reaction rate of stabilizer and heavy metal sewage sludge is fast, it is short and simple to operate to reach the time stablized, and is advantageous to
Scale processing.
Embodiment
Embodiment 1,
A kind of heavy metal stabilizer, contain 10 parts of 60 parts of modified zeolite, 42 parts of quick lime and sodium gluconate；It is described to change
Property zeolite ball processed is mixed by high Si-Al zeolite, high-calcium fly ass, rosin, and bake 1.5h under 380 DEG C of high temperature and be made.The height
Si-Al zeolite, high-calcium fly ass, the mixing ratio of rosin are 50:30:2.
The application method of above-mentioned heavy metal stabilizer for first by the moisture in pending heavy metal sewage sludge adjust to
45%；Again by the heavy metal sewage sludge after regulation moisture in S1 and heavy metal stabilizer according to 25:1 weight is than mixing, in 30-35
6-8h is reacted under conditions of DEG C.
Embodiment 2,
A kind of heavy metal stabilizer, contain 5 parts of 50 parts of modified zeolite, 35 parts of quick lime and sodium gluconate；It is described to change
Property zeolite ball processed is mixed by high Si-Al zeolite, high-calcium fly ass, rosin, and bake 1.5h under 380 DEG C of high temperature and be made.The height
Si-Al zeolite, high-calcium fly ass, the mixing ratio of rosin are 50:30:2.
Application method is consistent with embodiment 1.
Embodiment 3,
A kind of heavy metal stabilizer, contain 15 parts of 75 parts of modified zeolite, 50 parts of quick lime and sodium gluconate；It is described to change
Property zeolite ball processed is mixed by high Si-Al zeolite, high-calcium fly ass, rosin, and bake 1.5h under 380 DEG C of high temperature and be made.The height
Si-Al zeolite, high-calcium fly ass, the mixing ratio of rosin are 50:30:2.
Application method is consistent with embodiment 1.
Comparative example：
It is steady using zeolite 60%, calcium oxide 20%, magnesia 20% as heavy metal stabilizer, above-mentioned heavy metal using tradition
The application method for determining agent is first to adjust the moisture in pending heavy metal sewage sludge to 45%；Moisture will be adjusted in S1 again
Heavy metal sewage sludge afterwards is with heavy metal stabilizer according to 10:1 weight reacts 12h than mixing under conditions of 30-35 DEG C.
The stable rate of the heavy metal stabilizer heavy metal of above-described embodiment 1-3 and comparative example, experiment are detected respectively
Data are as follows：
Experiment shows, embodiments of the invention 1-3 in dosage in the case where reducing more than 50% than comparative example, to a huge sum of money
The stabilization effect of category is still better than conventional stabilizer.
Using it is above-mentioned according to desirable embodiment of the present invention as enlightenment, it is complete by above-mentioned description, relevant staff
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention'.This invention it is technical
Scope is not limited to the content on specification, it is necessary to determines its technical scope according to right.
Claims (4)
- A kind of 1. heavy metal stabilizer, it is characterised in that：Contain modified zeolite 50-75 parts, quick lime 35-50 parts and hydroxyl carboxylic Sour metal-chelator 5-15 parts；The modified zeolite mixes ball processed by high Si-Al zeolite, high-calcium fly ass, rosin, and at 380 DEG C 1.5h is baked under high temperature to be made.
- A kind of 2. heavy metal stabilizer as claimed in claim 1, it is characterised in that：The high Si-Al zeolite, high-calcium fly ass, The mixing ratio of rosin is 50:30:2.
- A kind of 3. heavy metal stabilizer as claimed in claim 1, it is characterised in that：Hydroxycarboxylate metal's chelating agent is Portugal Grape sodium saccharate.
- 4. the application method of the heavy metal stabilizer as described in any one in claim 1-3, it is characterised in that：Including following Step：S1, the moisture in pending heavy metal sewage sludge adjusted to 35-65%；S2, by S1 adjust moisture after heavy metal sewage sludge and heavy metal stabilizer according to 20-25:1 weight ratio mixing, 6-8h is reacted under conditions of 30-35 DEG C.
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| CN201711051921.0A CN107585986A (en) | 2017-10-30 | 2017-10-30 | A kind of heavy metal stabilizer and its application method |
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| CN201711051921.0A CN107585986A (en) | 2017-10-30 | 2017-10-30 | A kind of heavy metal stabilizer and its application method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111099798A (en) * | 2018-10-26 | 2020-05-05 | 南京化学工业园环保产业协同创新有限公司 | Preparation method of sewage treatment sludge heavy metal stabilizer |
| CN115536221A (en) * | 2021-06-28 | 2022-12-30 | 无锡金鹏环保科技有限公司 | Method for purifying heavy metal sludge |
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| CN106830261A (en) * | 2017-03-07 | 2017-06-13 | 苏州清控环保科技有限公司 | A kind of heavy metal chelating agent and preparation method thereof |
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Patent Citations (6)
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| JPH07136693A (en) * | 1993-11-22 | 1995-05-30 | Koji Ogawa | Sludge solidification agent |
| CN1258567A (en) * | 1998-12-30 | 2000-07-05 | 中国石油化工集团公司 | Macroporous Alpha-alumina and its preparation and application |
| CN101318788A (en) * | 2008-07-09 | 2008-12-10 | 东南大学 | Inorganic polymer material for sealing heavy metal castoff |
| CN103787558A (en) * | 2012-11-01 | 2014-05-14 | 深圳市海川实业股份有限公司 | Heavy metal stabilizer used for sludge treatment, and method for treating sludge by adopting it |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111099798A (en) * | 2018-10-26 | 2020-05-05 | 南京化学工业园环保产业协同创新有限公司 | Preparation method of sewage treatment sludge heavy metal stabilizer |
| CN115536221A (en) * | 2021-06-28 | 2022-12-30 | 无锡金鹏环保科技有限公司 | Method for purifying heavy metal sludge |
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