CN104709985B - Coal washing wastewater composite coagulant and preparation method thereof - Google Patents
Coal washing wastewater composite coagulant and preparation method thereof Download PDFInfo
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- CN104709985B CN104709985B CN201310695462.5A CN201310695462A CN104709985B CN 104709985 B CN104709985 B CN 104709985B CN 201310695462 A CN201310695462 A CN 201310695462A CN 104709985 B CN104709985 B CN 104709985B
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Abstract
The invention discloses a coal washing wastewater composite coagulant and a preparation method thereof. The composite coagulant comprises the following components by mass: 5-30% of alkylbenzene sulfonate, 25-55% of a magnesium salt, 10-40% of an aluminum salt, 5-35% of silicate, 0.1-4% of a rare earth element salt and 3-15% of a high polymer flocculant. The coagulant provided by the invention does not contain heavy metals, organic toxic substances and oher substances harmful to the environment and human body, is friendly to the environment, and can be used for treatment of various coal washing wastewater. The salts involved in the invention have no pollution to the environment and are all easily available. Thus, the coal washing wastewater composite coagulant is easy for promotion and application.
Description
Technical field
The present invention relates to coal washing waste water compound coagulant and preparation method thereof.
Background technology
Each process that coal washing waste water is present in coal washing, coal separation, coal are used, such as coal washing water, the coal separation of coal mine wet coal washing
The black water of factory, with flushing water of coal unit etc., these waste water are all the mixture of water and fine breeze, and it is mainly characterized by turbidity
How negatively charged height, solidss fine size, solid particles surface be, and the repulsion and Blang between same sex electric charge makes these microgranules in water
Keep dispersity；Due to the interaction in black water between solid particle interface（Such as absorption, dissolving, chemical combination）, make to wash
The property of coal waste water is considerably complicated, and coal washing waste water not only has the property of suspension, the also property with colloid.Due to above-mentioned original
Cause, coal washing waste water be difficult nature clarification, and this kind of waste water after precipitation supernatant is still with float such as a large amount of coal slimes
Black liquor, wherein containing harmful substances such as the various additives and heavy metal in the coal separation course of processing.Substantial amounts of coal washing waste water
Below standard discharge, causes water pollution, channel filling, coal slime loss, and to country great economic loss is caused, and also causes
Coal industry water resource is more in short supply, seriously governs the development of coal production, so exploitation coal washing waste water efficient process is new
Technology, new technology have important meaning.
The content of the invention
The technical problem to be solved is to overcome existing coal washing waste water difficult, easy pollution scarce
Fall into, there is provided a kind of coal washing waste water compound coagulant and preparation method thereof.The compound coagulant of the present invention has to coal washing waste water
Good coagulation clarification effect, can be used for the process of all kinds of coal washing waste waters, and the supernatant recoverable after processing, and its
It is friendly to environment and human body.
The present invention has found that compound coagulant can be by compound mixed with coal washing waste water as object of study through many experiments
The synergism effective process coal washing waste water of solidifying technology and rare earth element, the compound coagulant not only can be answered in the lab
With, and effect is also preferable in practice.
The present invention is to solve above-mentioned technical problem by the following technical programs：
The invention provides a kind of compound coagulant, it includes the component of following mass percents：Alkylbenzenesulfonate 5～
30%th, magnesium salt 25～55%, aluminium salt 10～40%, the salt 0.1～4% of silicate 5～35%, rare earth element and high polymer coagulant 3～
15%。
Wherein, described alkylbenzenesulfonate can be various alkylbenzenesulfonates commonly used in the art, preferably
Sodium alkyl benzene sulfonate and/or alkyl benzene sulphonate potassium, are more preferably sodium alkyl benzene sulfonate.Described sodium alkyl benzene sulfonate is preferably
Dodecylbenzene sodium sulfonate.It is 10～20% that described alkylbenzenesulfonate preferably accounts for the mass percent of compound coagulant.
Wherein, described magnesium salt can be magnesium salt commonly used in the art, preferably magnesium sulfate and/or magnesium chloride, more preferably
For magnesium sulfate.It is 35～45% that described magnesium salt preferably accounts for the mass percent of compound coagulant.
Wherein, described aluminium salt can be aluminium salt commonly used in the art, preferably aluminum sulfate and/or aluminum chloride, more preferably
For aluminum chloride.It is 20-30% that described aluminium salt preferably accounts for the mass percent of compound coagulant.
Wherein, described silicate can be silicate commonly used in the art, preferably sodium silicate and/or potassium silicate, more
It is goodly sodium silicate.It is 10～30% that described silicate preferably accounts for the mass percent of compound coagulant.
Wherein, the rare earth element in the salt of described rare earth element is preferably the one kind in lanthanum, praseodymium, cerium, neodymium, samarium and gadolinium
Or it is various, the anion in the salt of described rare earth element is preferably nitrate anion, sulfate radical or acetate.Described rare earth unit
The salt of element is more preferably one or more in cerous sulfate, lanthanum sulfate and Dipraseodymium trisulfate.The salt of described rare earth element is preferably accounted for
The mass percent of compound coagulant is 0.5～2%.
Wherein, described high polymer coagulant can be various high polymer coagulants commonly used in the art, preferably
One kind in anion-polyacrylamide, cationic-type polyacrylamide and non-ionic polyacrylamide, more preferably the earth pertaining to YIN
Polyacrylamide.The number-average molecular weight of described anion-polyacrylamide is preferably 12,000,000～13,000,000,
Ion degree is preferably 15%.It is 5～10% that described high polymer coagulant preferably accounts for the mass percent of compound coagulant.
Present invention also offers the preparation method of described coal washing waste water compound coagulant, it comprises the steps：Will be each
Component mix homogeneously.
The coal washing waste water compound coagulant of the present invention both can be used directly, it is also possible to which the wiring solution-forming that is dissolved in the water makes
With.
On the basis of common sense in the field is met, above-mentioned each optimum condition, can combination in any, obtain final product each preferable reality of the present invention
Example.
Unless otherwise specified, raw material according to the present invention and reagent are commercially available.
The present invention positive effect be：
1st, the material that coagulant of the invention is harmful to without heavy metal and organic toxic substance etc. to environment and human body, to ring
Border is friendly.
2nd, all kinds of salt environmentally safes used in the present invention, and be easier to obtain, easily promote the use of.
3rd, coagulant of the invention is corrosion-free to conventional water treatment facilities and structures.
4th, coagulant of the invention can be used for all kinds of coal washing waste waters and process, and dosing coagulant 100 under normal condition～
700mg/L, can make coal washing waste water process water outlet SS（Solid suspension concentration）＜ 5mg/L.
Description of the drawings
Fig. 1 is the coal washing waste water processing system process chart being routinely related in effect example.
Specific embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to described reality
Among applying a scope.The experimental technique of unreceipted actual conditions in the following example, conventionally and condition, or according to business
Product description is selected.
Embodiment 1
The preparation of coagulant：By 9g dodecylbenzene sodium sulfonate, 40g magnesium sulfate, 25g aluminum chloride, 20g sodium silicate, 1g sulfur
Sour cerium, 5g PAMAs（Number-average molecular weight is 13,000,000, and ion degree is 15%）, in being dissolved in 1L water, as coagulation
Agent solution.
Embodiment 2
The preparation of coagulant：By 8g dodecylbenzene sodium sulfonate, 35g magnesium sulfate, 20g aluminum chloride, 25g potassium silicates, 1g sulfur
Sour cerium, 1g Dipraseodymium trisulfates, 5g PAMAs（Number-average molecular weight is 13,000,000, and ion degree is 15%）, it is dissolved in 1L water
In, as coagulant solution.
Embodiment 3
The preparation of coagulant：By 13.5g dodecylbenzene sodium sulfonate, 35g magnesium sulfate, 20g aluminum chloride, 20g sodium silicate,
1.5g cerous sulfates, 5g PAMAs（Number-average molecular weight is 13,000,000, and ion degree is 15%）, in being dissolved in 1L water, i.e.,
For coagulant solution.
Embodiment 4
The preparation of coagulant：By 13.5g dodecylbenzene sodium sulfonate, 39g magnesium sulfate, 20g aluminum chloride, 25g sodium silicate, 1g
Cerous sulfate, 5g PAMAs（Number-average molecular weight is 13,000,000, and ion degree is 15%）, in being dissolved in 1L water, as mix
Solidifying agent solution.
Embodiment 5
The preparation of coagulant：By 15g dodecylbenzene sodium sulfonate, 39g magnesium sulfate, 20g aluminum chloride, 20g sodium silicate, 1g sulfur
Sour cerium, 5g PAMAs（Number-average molecular weight is 13,000,000, and ion degree is 15%）, in being dissolved in 1L water, as coagulation
Agent solution.
Embodiment 6
The preparation of coagulant：By 10g dodecylbenzene sodium sulfonate, 38g magnesium sulfate, 20g aluminum chloride, 25g sodium silicate, 2g sulfur
Sour cerium, 5g PAMAs（Number-average molecular weight is 13,000,000, and ion degree is 15%）, in being dissolved in 1L water, as coagulation
Agent solution.
Embodiment 7
The preparation of coagulant：By 15g dodecylbenzene sodium sulfonate, 34g magnesium sulfate, 20g aluminum chloride, 10g sodium silicate, 10g
Potassium silicate, 1g cerous sulfates, 10g PAMAs（It is 15% that number-average molecular weight is 13,000,000, ion degree）, it is dissolved in 1L
In water, as coagulant solution.
Embodiment 8
The preparation of coagulant：By 20g dodecylbenzene sodium sulfonate, 38g magnesium sulfate, 20g aluminum chloride, 10g sodium silicate, 1g sulfur
Sour cerium, 1g lanthanum sulfates, 10g PAMAs（It is 15% that number-average molecular weight is 13,000,000, ion degree）, it is dissolved in 1L water
In, as coagulant solution.
Comparative example 1
Remove cerous sulfate, remaining with embodiment 1 formula.
Comparative example 2
Existing conventional formulation is the aluminium polychlorid of 99wt% and the PAMA of 1wt%（Number-average molecular weight is
13000000, ion degree is 15%）.
Effect example 1
Coal washing waste water clarification experiments
The test water quality that this effect example is adopted：Six Pan Shui coal washerys waste water are taken, analytical data is as follows：PH value is
8.1, SS（Solid suspension concentration）It is worth for 34567.3mg/L.
1L coal washing waste waters are taken, the coagulant solution 3mL of above-described embodiment 1-8 and comparative example 1-2 is added, in stirring
Velocity gradient g value is 20s-1It is to react under 15min with mixing time T, then Jing 30min natural subsidence surveys supernatant SS values, experiment
As a result see the table below：
The coagulant of table 1 tests effect
Effect example 2
Coal washing waste water clarification experiments
The test water quality that this effect example is adopted：Liaoning Fuxin coal washery waste water is taken, analytical data is as follows：PH value is
7.9, SS（Solid suspension concentration）It is worth for 32132.5mg/L.
1L coal washing waste waters are taken, the coagulant solution 3.5mL of above-described embodiment 1-8 and comparative example 1-2 is added, is being stirred
Velocity gradient g value is mixed for 20s-1It is to react under 15min with mixing time T, then Jing 30min natural subsidence surveys supernatant SS values, it is real
Test result see the table below：
The coagulant of table 2 tests effect
Effect example 3
Coal washing waste water clarification experiments
The test water quality that this effect example is adopted：Datong coal washery waste water is taken, analytical data is as follows：PH value is
7.9, SS（Solid suspension concentration）It is worth for 42875.4mg/L.
1L coal washing waste waters are taken, the coagulant solution 4mL of above-described embodiment 1-8 and comparative example 1-2 is added, in stirring
Velocity gradient g value is 20s-1It is to react under 15min with mixing time T, then Jing 30min natural subsidence surveys supernatant SS values, experiment
As a result see the table below：
The coagulant of table 3 tests effect
Effect example 4
Liaoning coal washery waste water system, wastewater flow rate 500m3/ h, process chart is shown in Fig. 1, and Handling of Stabilizing Water Quality is using real
The coagulant solution of example 6 is applied, the concentration that adds of coagulant solution is 400mg/L, is added in inlet channel mixing by dosing pump
On device, after board and frame machine filter pressing, filtrate SS values, data such as following table are surveyed：
The coagulant of table 4 tests effect
| Sequence number | Sample time | Water inlet SS (mg/L) | Water outlet SS (mg/L) |
| 1 | 1 day 9 April in 2013：30 | 43734.2 | 1.4 |
| 2 | 1 day 14 April in 2013：30 | 45980.1 | 1.2 |
| 3 | 2 days 9 April in 2013：30 | 34586.3 | 1.6 |
| 4 | 2 days 14 April in 2013：30 | 31904.5 | 0.5 |
| 5 | 3 days 9 April in 2013：30 | 74342.8 | 0.7 |
| 6 | 3 days 14 April in 2013：30 | 63485.4 | 1.5 |
| 7 | 4 days 9 April in 2013：30 | 45323.8 | 1.4 |
| 8 | 4 days 14 April in 2013：30 | 56431.9 | 1.3 |
| 9 | 5 days 9 April in 2013：30 | 49784.4 | 0.9 |
| 10 | 5 days 14 April in 2013：30 | 50146.3 | 0.7 |
Effect example 5
Guizhou coal washery waste water system, wastewater flow rate 300m3/ h, process chart is shown in Fig. 1, and Handling of Stabilizing Water Quality is using real
The coagulant solution of example 6 is applied, the concentration that adds of coagulant solution is 500mg/L, is added in inlet channel mixing by dosing pump
On device, after board and frame machine filter pressing, filtrate SS Value Data such as following tables are surveyed：
The coagulant of table 5 tests effect
| Sequence number | Sample time | Water inlet SS (mg/L) | Water outlet SS (mg/L) |
| 1 | 1 day 9 June in 2013：30 | 55467.3 | 0.7 |
| 2 | 1 day 14 June in 2013：30 | 54679.2 | 1.5 |
| 3 | 2 days 9 June in 2013：30 | 43658.6 | 1.0 |
| 4 | 2 days 14 June in 2013：30 | 42167.9 | 0.9 |
| 5 | 3 days 9 June in 2013：30 | 34585.5 | 0.8 |
| 6 | 3 days 14 June in 2013：30 | 36431.2 | 1.1 |
| 7 | 4 days 9 June in 2013：30 | 43759.1 | 1.2 |
| 8 | 4 days 14 June in 2013：30 | 46832.5 | 1.4 |
| 9 | 5 days 9 June in 2013：30 | 52185.2 | 0.8 |
| 10 | 5 days 14 June in 2013：30 | 53457.6 | 1.2 |
Effect example 6
Shanxi coal washery waste water system, wastewater flow rate 200m3/ h, process chart is shown in Fig. 1, and Handling of Stabilizing Water Quality is using real
The coagulant solution of example 6 is applied, the concentration that adds of coagulant solution is 600mg/L, is added in inlet channel mixing by dosing pump
On device, after board and frame machine filter pressing, filtrate SS values, data such as following table are surveyed：
The coagulant of table 6 tests effect
| Sequence number | Sample time | Water inlet SS (mg/L) | Water outlet SS (mg/L) |
| 1 | September 1 day 9 in 2012：30 | 35712.4 | 0.9 |
| 2 | September 1 day 14 in 2012：30 | 37623.6 | 1.8 |
| 3 | September 2 days 9 in 2012：30 | 41684.8 | 1.1 |
| 4 | September 2 days 14 in 2012：30 | 44681.5 | 1.9 |
| 5 | September 3 days 9 in 2012：30 | 42189.4 | 1.2 |
| 6 | September 3 days 14 in 2012：30 | 34613.7 | 1.2 |
| 7 | September 4 days 9 in 2012：30 | 42692.4 | 1.4 |
| 8 | September 4 days 14 in 2012：30 | 45734.6 | 0.9 |
| 9 | September 5 days 9 in 2012：30 | 51387.4 | 0.9 |
| 10 | September 5 days 14 in 2012：30 | 54873.5 | 1.4 |
Claims (10)
1. a kind of coal washing waste water compound coagulant, it includes the component of following mass percents：Alkylbenzenesulfonate 5～30%,
Magnesium salt 25～55%, aluminium salt 10～40%, the salt 0.1～4% of silicate 5～35%, rare earth element and high polymer coagulant 3～
15%；
Described high polymer coagulant be anion-polyacrylamide, the equal molecule of number of described anion-polyacrylamide
Measure as 12,000,000～13,000,000, ion degree is 15%.
2. compound coagulant as claimed in claim 1, it is characterised in that described alkylbenzenesulfonate is sodium alkyl benzene sulfonate
And/or alkyl benzene sulphonate potassium, it is 10～20% that described alkylbenzenesulfonate accounts for the mass percent of compound coagulant.
3. compound coagulant as claimed in claim 2, it is characterised in that described sodium alkyl benzene sulfonate is detergent alkylate sulphur
Sour sodium.
4. compound coagulant as claimed in claim 1, it is characterised in that described magnesium salt is magnesium sulfate and/or magnesium chloride, institute
It is 35～45% that the magnesium salt stated accounts for the mass percent of compound coagulant.
5. compound coagulant as claimed in claim 1, it is characterised in that described aluminium salt is aluminum sulfate and/or aluminum chloride, institute
It is 20～30% that the aluminium salt stated accounts for the mass percent of compound coagulant.
6. compound coagulant as claimed in claim 1, it is characterised in that described silicate is sodium silicate and/or potassium silicate,
It is 10～30% that described silicate accounts for the mass percent of compound coagulant.
7. compound coagulant as claimed in claim 1, it is characterised in that the rare earth element in the salt of described rare earth element is
One or more in lanthanum, praseodymium, cerium, neodymium, samarium and gadolinium, the anion in the salt of described rare earth element is nitrate anion, sulfate radical
Or acetate；It is 0.5～2% that the salt of described rare earth element accounts for the mass percent of compound coagulant.
8. compound coagulant as claimed in claim 7, it is characterised in that the salt of described rare earth element is cerous sulfate, sulphuric acid
One or more in lanthanum and Dipraseodymium trisulfate.
9. compound coagulant as claimed in claim 1, it is characterised in that described high polymer coagulant accounts for compound coagulant
Mass percent is 5～10%.
10. the preparation method of the compound coagulant as any one of claim 1～9, it comprises the steps：By each group
Divide mix homogeneously.
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| CN106186561A (en) * | 2016-08-29 | 2016-12-07 | 浙江恒生印染有限公司 | A kind of low-carbon environment-friendly sewage water treatment method |
| CN110386650A (en) * | 2018-04-20 | 2019-10-29 | 上海四奥化工有限公司 | Coal washing polyacrylamide flocculant and preparation method thereof |
| CN108996637B (en) * | 2018-08-07 | 2021-09-07 | 阜阳大可新材料股份有限公司 | Treatment method of wastewater from production of density fiberboard |
| CN112047446B (en) * | 2020-09-07 | 2022-10-21 | 河北蓝江生物环保科技有限公司 | Solid settling agent for treating coal washing wastewater and preparation method thereof |
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| IT1189071B (en) * | 1986-03-14 | 1988-01-28 | Eniricerche Spa | PROCEDURE FOR THE REMOVAL OF METALS FROM WATERS CONTAINING THEM |
| EP1063202A3 (en) * | 1999-06-14 | 2001-06-13 | Zohar Detergent Factory | Biotreatment of surfactants in wastewater |
| CN101746867A (en) * | 2008-12-17 | 2010-06-23 | 沈阳工业大学 | Composite purifier for treating sewage |
| CN102372324A (en) * | 2010-08-06 | 2012-03-14 | 余建国 | Composite purifier |
| CN102531117A (en) * | 2010-12-23 | 2012-07-04 | 陕西蓝清环境科技有限公司 | Composite inorganic water purifying agent and preparation method thereof |
| CN102515299A (en) * | 2011-11-18 | 2012-06-27 | 大连兆阳软件科技有限公司 | Method for treating sewage by utilizing fly ash |
| CN103265100B (en) * | 2013-05-08 | 2015-10-28 | 上海纳米技术及应用国家工程研究中心有限公司 | A kind of preparation method of iron aluminium composite highly effective adhesive flocculant |
| CN103304095A (en) * | 2013-05-27 | 2013-09-18 | 内蒙古包钢钢联股份有限公司 | Treatment method for improving removal rate of benzo (a) pyrene in coking wastewater |
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