CN103253749B - Method for rapid settlement of magnesium oxide particles in circulating water - Google Patents
Method for rapid settlement of magnesium oxide particles in circulating water Download PDFInfo
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- CN103253749B CN103253749B CN201210034085.6A CN201210034085A CN103253749B CN 103253749 B CN103253749 B CN 103253749B CN 201210034085 A CN201210034085 A CN 201210034085A CN 103253749 B CN103253749 B CN 103253749B
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Abstract
The invention discloses a method for rapid settlement of magnesium oxide particles in circulating water. The method comprises the steps of: making circulating water in a scrubbing groove overflow to a relay groove; employing an extraction device to send the circulating water from the relay groove to a stirring groove by a pipeline, and simultaneously adding an coagulant aid to the pipeline between the relay groove and the stirring groove from a place close to the stirring groove, adding a flocculating agent into the stirring groove, then using a stirring rod to stir them fully; after complete stirring, letting the circulating water overflow to at least one settlement groove to undergo settlement, discharging settled magnesium oxide sludge from the settlement groove, and making the settled circulating water outflow from an overflow port of the settlement groove. Specifically, the effective components of the coagulant aid comprise: 10-15wt% of a polyamine organic matter and 10-15wt% of hydroxy aluminum chloride. And the effective component of the flocculating agent is a polyacrylamide copolymer.
Description
Technical field
The present invention relates to a kind of particulate matter sedimentation method, relate in particular to a kind of sedimentation method of magnesium oxide particle.
Background technology
In order to make oriented silicon steel surface form distinctive Magnesium Silicate q-agent bottom to improve insulating property and the magnetic property of oriented silicon steel after high temperature annealing, after decarburizing annealing, belt steel surface must apply magnesium oxide coating.But the magnesium oxide coating of belt steel surface only has 3～15% to participate in the formation of Magnesium Silicate q-agent bottom, and remaining magnesium oxide particle must scrub clean in rear operation, then could apply inorganic insulation coating.And these scrub the remaining magnesium oxide particle and the water that get off and be mixed to form magnesium oxide muddy water suspension liquid, and along with entering to scrub, recirculated water in recycle system settling tank, carries out precipitate and separate.
Fig. 1 has shown that existing magnesium oxide does the wash the structure of the recycle system.As shown in Figure 1, band steel 1 is scrubbed online groove 2 at magnesium oxide and is scrubbed, and is scrubbed the magnesium oxide that gets off along with recirculated water is back in muddy water relaying groove 3, then by spiral pump 5 and pipeline 6, is sent in steel basin 7, by agitator arm 8, stirs.Magnesium oxide suspension liquid through stirring overflows in settling bath 9.In settling bath 9, magnesium oxide particle is precipitated to bottom land by swash plate system 10, and most of water on upper strata overflows to clear water relaying groove 4 after precipitation, then enters magnesium oxide and does the wash cycling and reutilization in the recycle system; Lower floor's magnesium oxide muddy water is pumped to whizzer 12 by the spiral pump 11 of bottom land and carries out mud-water separation, and separated magnesium oxide mud enters into mud bucket 13; The water of separating enters into clear water relaying groove 4, thereby enter into magnesium oxide, does the wash the recycle system and carries out recycle.
But there is following problem in this cover system:
(1) because online circulating water flow is larger, be about 80～250m
3/ h, is far longer than the discharge of general water treatment system, and this also can cause the magnesium oxide particle of not sedimentation to flow in online brushing system with recirculated water again, thereby has influence on the efficiency of scrubbing to belt steel surface;
(2) with general sewage in be suspended phase ratio, magnesium oxide particle too tiny (10～50 μ m), be difficult to timely sedimentation, therefore easily along with recirculated water enters into return line, and accumulate in some valves or corner, cause each position of the recycle system all to there will be obstruction and mud to pile up, thereby cause unit disorderly closedown, the efficiency of producing and the quality of product are caused to great impact;
(3) through producing for a long time, the magnesium oxide particle accumulating in a large number on swash plate can make the pitch smaller of swash plate even stop up, thereby greatly reduces swash plate processing power, makes magnesium oxide particle more be difficult to sedimentation.Therefore, the magnesium oxide particle suspending in recirculated water rolls up, even if often change water, also cannot slow down the magnesium oxide particle in recirculated water, thereby causes the environment in the recycle system further to worsen, and discharge reduces, and when serious, will cause the industrial accident of cutting off the water supply.
The method of domestic existing processing magnesium oxide suspension liquid is to adopt larger settling tank, and by the precipitation of long period, then the water overflowing is carried out to other utilizations.This method has problems equally: because discharge is larger, need settling tank and the parking space of larger volume; However, still have the tiny magnesium oxide particle of part along with water overflows in the recycle system.
Summary of the invention
The object of the present invention is to provide a kind of method that makes the magnesium oxide particle rapid subsidence in recirculated water, this rapid subsidence method should be fast and is fully precipitated the magnesium oxide particle in recirculated water, guarantee the quality of recirculated water, in elimination magnesium oxide is scrubbed the recycle system, cut off the water supply in accident potential, improve the quality that magnesium oxide is scrubbed.
According to foregoing invention object, the invention provides a kind of method that makes the magnesium oxide particle rapid subsidence in recirculated water, it comprises the following steps:
By in recirculated water overflow to relaying groove of scrubbing in groove;
Adopt a draw-out device that recirculated water is delivered in a steel basin by pipeline from relaying groove, near steel basin place, in the pipeline between relaying groove and steel basin, adding coagulant aids simultaneously, and add flocculation agent in steel basin, then adopt an agitator arm fully to stir;
Through well-beaten recirculated water overflow, at least one settling bath, carry out sedimentation, through the magnesium oxide mud of sedimentation, discharge settling bath, the recirculated water of process sedimentation is flowed out by the overflow port of settling bath;
Wherein, the effective constituent of coagulant aids is: polyamine type organic, and it accounts for the 10-15wt% of coagulant aids; Aluminium chlorohydroxide, it accounts for the 10-15wt% of coagulant aids; The addition of coagulant aids is every cubic metre of recirculated water 20-200ppm;
Wherein, the effective constituent of flocculation agent is polyacrylamide copolymer, and its addition is every cubic metre of recirculated water 0.5-20ppm.
In the technical program, the Main Function of coagulant aids is the neutralizing effect by electric charge, assembles tiny magnesium oxide particle, forms a large amount of subsets; The Main Function of flocculation agent is under the stirring of agitator arm, makes the further polymerization of a large amount of magnesium oxide subsets forming through coagulant aids in recirculated water generate macromolecular mass floss, thereby can precipitate fast.
In order further to strengthen the effect of settling of magnesium oxide particle, in above-mentioned method, adopt a dividing plate that described settling bath is divided into first part and a second section, and some swash plates are set in second section, through well-beaten recirculated water first overflow to described first part, and under the effect of swash plate, carry out sedimentation.After the precipitation of first part and second section, the magnesium oxide particle in recirculated water is precipitated fully, thereby the quality of recirculated water is further got a promotion.
The method of the magnesium oxide particle rapid subsidence in recirculated water that makes of the present invention is by adding coagulant aids and flocculation agent, and while enhanced system sedimentation capacity, and it is compared with existing sedimentation method, has following advantages:
(1) technical solutions according to the invention can significantly improve settling velocity and the sedimentation capacity of magnesium oxide particle, and the quality of recirculated water is significantly improved, thereby have effectively strengthened the scrub efficiency of equipment to belt steel surface;
(2) quality due to recirculated water significantly improves, thereby has eliminated in recirculated water magnesium oxide mud to pile up and the unit fault that causes, has guaranteed the normal production of unit.
Accompanying drawing explanation
Fig. 1 is the structural representation that original magnesium oxide is done the wash the recycle system.
Fig. 2 implements the magnesium oxide of the method for the magnesium oxide particle rapid subsidence in recirculated water that makes of the present invention to do the wash the structural representation of the recycle system under a kind of embodiment.
Fig. 3 is the schema of the method that makes the magnesium oxide particle rapid subsidence in recirculated water of the present invention under a kind of embodiment.
Embodiment
Fig. 2 has shown that implementing the magnesium oxide of the magnesium oxide particle rapid subsidence method in recirculated water that makes of the present invention does the wash recycle system structure in the present embodiment.Fig. 3 has shown magnesium oxide particle rapid subsidence method in the recirculated water flow process in the present embodiment that makes of the present invention.In conjunction with Fig. 2, Fig. 3, the concrete steps of the technical scheme described in the present embodiment are as follows:
(1) scrub scrubbing 2 pairs of grooves band steel 1;
(2) scrub recirculated water overflow in groove 2 to muddy water relaying groove 3;
(3) spiral pump 5 is delivered to steel basin 7 from muddy water relaying groove 3 by pipeline 6 by recirculated water, adds coagulant aids 6 li of the pipelines near steel basin 7 places simultaneously; Coagulant aids is stored in coagulant aids holding tank 17, and joins in pipeline 6 by coagulant aids solution feed pump 16;
(4), to the interior interpolation flocculation agent of steel basin 7, then adopt agitator arm 8 fully to stir; Flocculation agent is stored in flocculation agent holding tank 15, and joins in steel basin 7 by flocculation agent solution feed pump 14;
(5) through well-beaten recirculated water overflow, to the first part 18 of settling bath 9, carry out rapid subsidence; Magnesium oxide mud under sedimentation is deposited in the bottom of settling bath 9;
(6) the recirculated water overflow of process first part 18 rapid subsidence, to the second section 19 of settling bath 9, is carried out further sedimentation under the effect of swash plate system 10; Mud in the same step of magnesium oxide mud (5) under sedimentation under sedimentation is deposited in the bottom of settling bath 9 together;
(7a), after the sedimentation of completing steps (6), the clean water overflow on upper strata is to clear water relaying groove 4;
(7b) the magnesium oxide mud in the sedimentation Hou， of completing steps (6) lower floor is transported to whizzer 12 by spiral pump 11, carries out mud-water separation;
(8a), after completing the mud-water separation of (7b), clear water is sent in clear water relaying groove 4;
(8b), after completing the mud-water separation of (7b), mud is sent in mud bucket 13;
(9) clear water in clear water relaying groove 4 is delivered to and scrubbed groove 2, get back to step (1).
In each embodiment of the technical program, the effective constituent of the coagulant aids in step (3) is: poly-tetramine organism (B
4h
10n), it accounts for the 10-15wt% of coagulant aids; Aluminium chlorohydroxide, it accounts for the 10-15wt% of coagulant aids; The addition of coagulant aids is that to make the concentration of coagulant aids in recirculated water be 20-200ppm.Add the magnesium oxide suspension liquid of coagulant aids in pipeline, to carry out preliminary hybrid reaction, generate a large amount of subsets.
In each embodiment of the technical program, the effective constituent of the flocculation agent in step (4) is a kind of highly purified cationic polyacrylamide (PAM), and its molecular formula is (CH
2cHCONH
2)
x, be white powder, before use, be first mixed with solution, then join in steel basin, its addition is that to make the concentration of recirculated water flocculation agent be 0.5-20ppm.And under effective stirring of agitator arm, carry out further hybrid reaction, generate macromolecular mass floss, thereby can precipitate fast.
Table 1 has been listed the interpolation parameter of coagulant aids and flocculation agent in the embodiment 1-5 of the technical program.
Table 1.
In addition,, in order to guarantee the settling efficiency of swash plate system, the impact that its mud of not piled up is thickened, preferably carried out once flushing every 2～4 weeks to swash plate system; In order to ensure the clean-up performance (organic content≤10ppm and chloride ion content≤300ppm) of recirculated water, (quantity of exchanged water is 10～60m preferably within every two days, quantitatively to change water
3), and every 1～4 week, recirculated water is sampled and detects monitoring (monitored results is in Table 1).
Table 1.
From table 1, adopt rapid subsidence method described in the technical program can effectively improve the quality of recirculated water, make its requirement of scrubbing that meets oriented silicon steel surface oxidation magnesium, and system is not had a negative impact.
Be noted that above enumerate only for specific embodiments of the invention, obviously the invention is not restricted to above embodiment, have many similar variations thereupon.If all distortion that those skilled in the art directly derives or associates from content disclosed by the invention, all should belong to protection scope of the present invention.
Claims (2)
1. a method that makes the magnesium oxide particle rapid subsidence in recirculated water, is characterized in that, comprises the following steps:
By in recirculated water overflow to relaying groove of scrubbing in groove;
Adopt a draw-out device that recirculated water is delivered in a steel basin by pipeline from described relaying groove, near steel basin place, in the pipeline between relaying groove and steel basin, adding coagulant aids simultaneously, and add flocculation agent in described steel basin, then adopt an agitator arm fully to stir;
Through well-beaten recirculated water overflow, at least one settling bath, carry out sedimentation, through the magnesium oxide mud of sedimentation, discharge settling bath, the recirculated water of process sedimentation is flowed out by the overflow port of settling bath;
Wherein, the effective constituent of described coagulant aids is: polyamine type organic, and it accounts for the 10-15wt% of coagulant aids; Aluminium chlorohydroxide, it accounts for the 10-15wt% of coagulant aids; The addition of described coagulant aids is that the concentration of coagulant aids in recirculated water is 20-200ppm;
Wherein, the effective constituent of described flocculation agent is polyacrylamide copolymer, and its addition is that the concentration of flocculation agent in recirculated water is 0.5-20ppm.
2. the method for claim 1, is characterized in that:
Adopt a dividing plate that described settling bath is divided into first part and a second section, and some swash plates are set in described second section, the well-beaten recirculated water of described process first overflow to described first part, and carries out sedimentation under the effect of swash plate.
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| CN110981000A (en) * | 2019-11-20 | 2020-04-10 | 武汉钢铁有限公司 | Method for treating silicon steel magnesium oxide wastewater |
| CN114105232B (en) * | 2020-08-30 | 2023-09-12 | 宝山钢铁股份有限公司 | Silicon steel magnesium oxide wastewater treatment and recycling method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101117250A (en) * | 2007-06-01 | 2008-02-06 | 华电水处理技术工程有限公司 | Method and equipment for purifying recirculated cooling water or town B-grade sewage |
| CN102267751A (en) * | 2010-10-26 | 2011-12-07 | 苏木清 | Rapid precipitation and concentration tank for tailing sewage |
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| FR2891540B1 (en) * | 2005-09-30 | 2007-12-28 | Otv Sa | METHOD FOR TREATING WATER COMPRISING A RAPID DECANTATION STEP FOLLOWED BY A FILTRATION STEP DIRECTLY ON MEMBRANES OF MICRO OR ULTRA-FILTRATION, AND CORRESPONDING DEVICE |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101117250A (en) * | 2007-06-01 | 2008-02-06 | 华电水处理技术工程有限公司 | Method and equipment for purifying recirculated cooling water or town B-grade sewage |
| CN102267751A (en) * | 2010-10-26 | 2011-12-07 | 苏木清 | Rapid precipitation and concentration tank for tailing sewage |
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