CN207525068U - The system of silica and hardness in a kind of removal industrial wastewater - Google Patents
The system of silica and hardness in a kind of removal industrial wastewater Download PDFInfo
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- CN207525068U CN207525068U CN201721245489.4U CN201721245489U CN207525068U CN 207525068 U CN207525068 U CN 207525068U CN 201721245489 U CN201721245489 U CN 201721245489U CN 207525068 U CN207525068 U CN 207525068U
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Abstract
The utility model discloses the systems of silica and hardness in a kind of removal industrial wastewater, including regulating reservoir, reaction tank, flocculation basin, sedimentation basin, discharge bay, magnesia tank, sodium metaaluminate tank and PAM tanks, regulating reservoir, reaction tank, flocculation basin, sedimentation basin and discharge bay are arranged side by side and are sequentially communicated；The utility model is simple in structure, reasonable design.System structure is simple disclosed in the utility model, reasonable design, silica and hardness in industrial wastewater are removed using the system, by the scheme for adding magnesia and sodium aluminate, preliminary generation intermediary magnalium hydrotalcite, then magnesium hydroxide, albite and aluminium hydroxide indissoluble colloid are generated, so as to reduce the content of silica and total hardness in waste water, effectively prevent silica, influence to follow-up system is blocked up in calcium and magnesium fouling dirt, the stable operation for follow-up membranous system and evaporation and crystallization system provides guarantee.
Description
Technical field：
The utility model is related to the systems of silica and hardness in a kind of removal industrial wastewater, belong to water treatment field.
Background technology：
When silica, calcium ion and magnesium ion are by film concentration systems in industrial wastewater, easily make membrane module fouling, dirt
It is stifled, its flux moment is caused to decline；And fouling dirt occur for membrane module block up its rear change needed to wash that the time is long, reagent consumption is big,
It is difficult to ensure that the stabilization of system is run for a long time.Meanwhile by silica, calcium ion and the magnesium in waste water after film concentration systems from
It can not change after the easily fouling in evaporator, especially silica fouling after sub further concentration and wash recovery, cause serious shadow
Ring the quality of crystal salt.It follows that the silica, calcium ion and magnesium ion in removal industrial wastewater are particularly critical.
At this stage, handle industrial wastewater in the method for calcium ion and magnesium ion mainly have Dual alkali, lime softening method and from
Sub- exchange process is aided with magnesia mixture except the silica in silicon process removal industrial wastewater.But the above method is all deposited in application process
Limited in certain condition, Dual alkali be primarily adapted for use in total hardness in the non-carbonate hardness and raw water in water removal it is higher and
The relatively low situation of total alkalinity；Lime softening method is all very high mainly for basicity in raw water and hardness, and basicity is apparently higher than hardness
Situation；Ion-exchange mainly for the calcium and magnesium ion in raw water it is relatively low when, utmostly reduce strong brine total hardness,
After being handled by ion-exchange, the salt content of strong brine is increased slightly, and basicity remains unchanged.
In conclusion Dual alkali, lime softening method, ion-exchange and magnesia mixture are except silicon process, all there are one in application process
Fixed condition limitation, more restricts its development, the silica and calcium ion, magnesium in these methods removal industrial wastewater from
Son mainly adds medicament by chemically reacting generation precipitation, and the removal efficiency for leading to calcium ion, magnesium ion and silica is whole
Body is relatively low, and hardness removal efficiency is up to 85%, and the removal rate of silica is only 60%.Its concentration after being concentrated by film
Further increase, seriously constrain the development of high slat-containing wastewater zero-discharge technology.Meanwhile the sludge quantity of generation it is larger, due to magnesium
Agent and white lime are micro-soluble material, and drug feeding pipeline easily blocks.
Utility model content：
The purpose of this utility model is to provide silica in efficient, stable, the economic removal industrial wastewater of one kind and firmly
The system of degree；
The utility model is implemented by following technical solution：The system of silica and hardness in a kind of removal industrial wastewater,
It includes regulating reservoir, reaction tank, flocculation basin, sedimentation basin, discharge bay, magnesia tank, sodium metaaluminate tank and PAM tanks, the adjusting
Pond, the reaction tank, the flocculation basin, the sedimentation basin and the discharge bay are arranged side by side and are sequentially communicated；Wherein, the tune
Pool wall bottom between section pond and the reaction tank offers port, the pool wall top between the reaction tank and the flocculation basin
Equipped with overflow port, port is equipped in the middle part of the pool wall between the flocculation basin and the sedimentation basin, solid-liquid mixing is equal in the middle part of flocculation basin
Even, pool wall top between the sedimentation basin and the discharge bay is equipped with overflow port, the water outlet of the discharge bay with it is follow-up
It is connected with water conservancy project section water inlet；The bottom of pond of the sedimentation basin and the feed inlet of filter press are connected by sludge pipe, the filter press
Mud discharging mouth connect with sludge treating block；
The magnesia tank and the sodium metaaluminate tank are connect with the reaction tank by pipeline, the PAM tanks and institute
Flocculation basin is stated to connect by pipeline；
Rotation is equipped with mixing and blending machine in the reaction tank, is rotated in the flocculation basin and is equipped with flocculation stirring machine,
Rotation is equipped with mud scraper in the sedimentation basin.
Further, it is logical on the pool wall between the blade of the flocculation stirring machine and the flocculation basin and the sedimentation basin
Mouth is concordant.
Further, the bottom of pond of the regulating reservoir, the reaction tank, the flocculation basin and the discharge bay is equipped with emptying
Pipe, the evacuated tube with emptying manifold connect, for system deactivate afterwards with overhaul when empty pond body in waste water.
Workflow：
The technique of silica and hardness in industrial wastewater is removed using this system, including following process：
(1) quenched process, it is quenched by being mixed in separate sources waste water addition regulating reservoir, do not add any object in regulating reservoir
On the one hand matter prevents waste water to be directly entered and causes the inflow in reaction tank suddenly big or suddenly small in reaction tank, on the other hand prevent into
Enter calcium and magnesium in reaction tank in waste water and dioxide-containing silica is suddenly big or suddenly small, the impact to subsequent reactions pond, reaction is caused not fill
Point or added amount of chemical it is excessive the problems such as, belong to physics adjust process, any chemical change does not occur, after balanced adjusting
Liquid；
(2) reaction process, adjusts the pH to 10~10.5 of liquid after the adjusting, addition account for liquid 85 after the adjusting~
The sodium metaaluminate of 100mg/L and the magnesia of 35~45mg/L, while stirred with the speed of 70~80r/min, reaction 20~
Liquid after being reacted after 30min；
(3) flocculation operation adds in flocculant in liquid after the reaction, liquid after being flocculated；
(4) process is precipitated：Liquid precipitate detaches 60~90min after the flocculation, obtains supernatant and sludge, the supernatant
As qualified production water.
Further, the sodium metaaluminate and the magnesia add in simultaneously in the form of a solution, the sodium aluminate solution
Concentration with the magnesium oxide solution is respectively 10~15m% and 2~5m ‰, and sodium metaaluminate and magnesia are thrown in the form of a solution
Add, convenient for pipeline conveying and control its dosage；Magnesia belongs to micro-soluble material, and high concentration easily blocks pipeline, therefore needs
Control its solution concentration.
Further, described (3) flocculation operation：After the reaction in liquid add in account for reaction after 3~5m of liquid ‰ PAM,
PAM, that is, polyacrylamide is a kind of organic high molecular polymer of threadiness, while is also a kind of macromolecular water-soluble water process wadding
Solidifying agent product, can specially adsorb the suspended particulate in water, play link bridging action between particles, compare fine grained formation
Big floc sedimentation, and the speed of precipitation is accelerated, the PAM is added in the form of the PAM flocculants of a concentration of 3~5m ‰；Simultaneously
It is stirred with the speed of 15~20r/min, liquid after the flocculation is obtained after reacting 10~15min.
In the utility model, sodium metaaluminate and magnesia are added into industrial wastewater, following reaction occurs：
6Mg2++2Al3++16OH-+CO3 2-+4H2O→Mg6Al2(OH)16CO3↓ [1]
2Mg6Al2(OH)16CO3+4Na++4Si2++2Ca2++8OH-→Na2Al2Si2O8↓+12Mg(OH)2↓+2CaCO3↓ [2]
AlO2-+H++H2O→Al(OH)3↓ [3]
Mg2++2OH-→Mg(OH)2↓ [4]
Sodium metaaluminate and magnesia generate magnalium hydrotalcite (Mg in water6Al2(OH)16CO3), the magnalium hydrotalcite of generation
Efficiently remove silica, calcium and magnesium ion by complex reaction, while magnesium extra under alkaline condition, aluminium ion are into one
Step sedimentation, reduces hardness and the content of insoluble matter in water, is finally reached while removes in high saliferous industrial wastewater to greatest extent
The purpose of silica, calcium ion and magnesium ion.
The advantages of the utility model：
System structure is simple disclosed in the utility model, reasonable design, and titanium dioxide in industrial wastewater is removed using the system
Silicon and hardness, it is preliminary to generate intermediary magnalium hydrotalcite by adding the scheme of magnesia and sodium aluminate, then generate hydroxide
Magnesium, albite and aluminium hydroxide indissoluble colloid, so as to reduce the content of silica and total hardness in waste water, effectively prevent two
Silica, calcium and magnesium fouling dirt block up the influence to follow-up system, and the stable operation for follow-up membranous system and evaporation and crystallization system provides
It ensures.
Description of the drawings：
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the system diagram of embodiment 1.
In figure：Regulating reservoir 1, reaction tank 2, flocculation basin 3, sedimentation basin 4, discharge bay 5, magnesia tank 6, sodium metaaluminate tank 7,
PAM tanks 8, filter press 9, mixing and blending machine 10, flocculation stirring machine 11, mud scraper 12, evacuated tube 13 empty manifold 14, with water list
Member 15, sludge treating block 16.
Specific embodiment：
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without creative efforts
All other embodiments obtained shall fall within the protection scope of the present invention.
Embodiment 1：
The system of silica and hardness in a kind of removal industrial wastewater, including regulating reservoir 1, reaction tank 2, flocculation basin 3,
Sedimentation basin 4, discharge bay 5, magnesia tank 6, sodium metaaluminate tank 7 and PAM tanks 8, regulating reservoir 1, reaction tank 2, flocculation basin 3, sedimentation basin 4
Be arranged side by side and be sequentially communicated with discharge bay 5, regulating reservoir 1, reaction tank 2, flocculation basin 3 and discharge bay 5 bottom of pond be equipped with emptying
Pipe 13, evacuated tube 13 with emptying manifold 14 connect, for system deactivate afterwards with maintenance when emptying pond body in waste water；Wherein,
Pool wall bottom between regulating reservoir 1 and reaction tank 2 offers port, and the pool wall top between reaction tank 2 and flocculation basin 3, which is equipped with, overflows
Head piece is equipped with port in the middle part of pool wall between flocculation basin 3 and sedimentation basin 4, and 3 middle part solid-liquid of flocculation basin is uniformly mixed, sedimentation basin 4 with
Pool wall top between discharge bay 5 is equipped with overflow port, and the water outlet of discharge bay 5 is connected with 15 water inlet of water use sector；Precipitation
The bottom of pond in pond 4 is connect with the feed inlet of filter press 9 by sludge pipe, and the mud discharging mouth of filter press 9 is connect with sludge treating block 16；
Magnesia tank 6 and sodium metaaluminate tank 7 are connect with reaction tank 2 by pipeline, and PAM tanks 8 pass through pipeline with flocculation basin 3
Connection；
Rotation is equipped with mixing and blending machine 10 in reaction tank 2, is rotated in flocculation basin 3 and is equipped with flocculation stirring machine 11, flocculation
The port on pool wall between the blade of blender 11 and flocculation basin 3 and sedimentation basin 4 is concordant, rotates to be equipped in sedimentation basin 4 and scrape
Mud machine 12.
Embodiment 2
The method of silica and hardness in industrial wastewater is removed using 1 system of embodiment, including (1) quenched process
By total hardness=1200mg/L, SiO2The industrial wastewater of=95mg/L is continuously added to regulating reservoir 1, and alkali is added to adjust its pH
Value reaches 10, adjusted rear liquid；Flow of inlet water is 15m3/ h makes industrial wastewater in reaction tank 2, flocculation basin 3 and sedimentation basin 4
Residence time be respectively 30min, 15min and 80min, the residence time is related with the capacity and wastewater flow of each pond body；
(2) reaction process
Liquid is continuously drained into reaction tank 2 from regulating reservoir 1 after adjusting, at the same to reaction tank 2 be continuously added to sodium aluminate solution and
The concentration of magnesium oxide solution, sodium aluminate solution and magnesium oxide solution is respectively 10m% and 2m ‰, sodium metaaluminate and magnesia with
Solution form adds, convenient for pipeline conveying and control its dosage；Magnesia belongs to micro-soluble material, and high concentration easily blocks pipe
Road, it is therefore desirable to control its solution concentration；The content of sodium metaaluminate and magnesia is 85mg/L and 35mg/ in liquid after control and regulation
L；
Start mixing and blending machine 10, adjust mixing and blending machine 10 and stirred by 70r/min of rotating speed, liquid after being reacted；
(3) flocculation operation
Liquid is continuously drained into flocculation basin 3 from reaction tank 2, while is continuously added to big point of a concentration of 3 ‰ to flocculation basin 3 after reaction
Sub- cationic PAM, the content of PAM is 3.5mg/L in liquid after control reaction；
Start flocculation stirring machine 11, adjust flocculation stirring machine 11 and stirred by 15r/min of rotating speed, liquid after being flocculated；
(4) process is precipitated
Liquid is continuously drained into sedimentation basin 4 from flocculation basin 3 after reaction, obtains sludge and supernatant, starts mud scraper 12, sludge quilt
Filter press 9 is discharged into, sludge treating block 16 is discharged into after press filtration and is handled；Supernatant overflow is discharged into discharge bay 5, obtains qualified production
Water.
Embodiment 3：
The method of silica and hardness in industrial wastewater is removed using 1 system of embodiment, including (1) quenched process
By total hardness=1200mg/L, SiO2The industrial wastewater of=95mg/L is continuously added to regulating reservoir 1, and alkali is added to adjust its pH
Value reaches 10.5, adjusted rear liquid；Flow of inlet water is 15m3/ h makes industrial wastewater in reaction tank 2, flocculation basin 3 and sedimentation basin 4
The interior residence time is respectively 30min, 15min and 80min, and the residence time is related with the capacity and wastewater flow of each pond body；
(2) reaction process
Liquid is continuously drained into reaction tank 2 from regulating reservoir 1 after adjusting, at the same to reaction tank 2 be continuously added to sodium aluminate solution and
The concentration of magnesium oxide solution, sodium aluminate solution and magnesium oxide solution is respectively 15m% and 5m ‰, sodium metaaluminate and magnesia with
Solution form adds, convenient for pipeline conveying and control its dosage；Magnesia belongs to micro-soluble material, and high concentration easily blocks pipe
Road, it is therefore desirable to control its solution concentration；After control and regulation in liquid the content of sodium metaaluminate and magnesia for 100mg/L and
45mg/L；
Start mixing and blending machine 10, adjust mixing and blending machine 10 and stirred by 80r/min of rotating speed, liquid after being reacted；
(3) flocculation operation
Liquid is continuously drained into flocculation basin 3 from reaction tank 2, while is continuously added to big point of a concentration of 5 ‰ to flocculation basin 3 after reaction
Sub- cationic PAM, the content of PAM is 5.5mg/L in liquid after control reaction；
Start flocculation stirring machine 11, adjust flocculation stirring machine 11 and stirred by 20r/min of rotating speed, liquid after being flocculated；
(4) process is precipitated
Liquid is continuously drained into sedimentation basin 4 from flocculation basin 3 after reaction, obtains sludge and supernatant, starts mud scraper 12, sludge quilt
Filter press 9 is discharged into, sludge treating block 16 is discharged into after press filtration and is handled；Supernatant overflow is discharged into discharge bay 5, obtains qualified production
Water.
Embodiment 4：
The method of silica and hardness in industrial wastewater is removed using 1 system of embodiment, including (1) quenched process
By total hardness=1200mg/L, SiO2The industrial wastewater of=70mg/L is continuously added to regulating reservoir 1, and alkali is added to adjust its pH
Value reaches 10.5, adjusted rear liquid；Flow of inlet water is 15m3/ h makes industrial wastewater in reaction tank 2, flocculation basin 3 and sedimentation basin 4
The interior residence time is respectively 30min, 15min and 80min, and the residence time is related with the capacity and wastewater flow of each pond body；
(2) reaction process
Liquid is continuously drained into reaction tank 2 from regulating reservoir 1 after adjusting, at the same to reaction tank 2 be continuously added to sodium aluminate solution and
The concentration of magnesium oxide solution, sodium aluminate solution and magnesium oxide solution is respectively 12m% and 4m ‰, sodium metaaluminate and magnesia with
Solution form adds, convenient for pipeline conveying and control its dosage；Magnesia belongs to micro-soluble material, and high concentration easily blocks pipe
Road, it is therefore desirable to control its solution concentration；The content of sodium metaaluminate and magnesia is 90mg/L and 40mg/ in liquid after control and regulation
L；
Start mixing and blending machine 10, adjust mixing and blending machine 10 and stirred by 75r/min of rotating speed, liquid after being reacted；
(3) flocculation operation
Liquid is continuously drained into flocculation basin 3 from reaction tank 2, while is continuously added to big point of a concentration of 4 ‰ to flocculation basin 3 after reaction
Sub- cationic PAM, the content of PAM is 5mg/L in liquid after control reaction；
Start flocculation stirring machine 11, adjust flocculation stirring machine 11 and stirred by 20r/min of rotating speed, liquid after being flocculated；
(4) process is precipitated
Liquid is continuously drained into sedimentation basin 4 from flocculation basin 3 after reaction, obtains sludge and supernatant, starts mud scraper 12, sludge quilt
Filter press 9 is discharged into, sludge treating block 16 is discharged into after press filtration and is handled；Supernatant overflow is discharged into discharge bay 5, obtains qualified production
Water.
Waste water and production water Indexs measure, concrete outcome to embodiment 2-4 are listed in the table below
As can be known from the above table, total hardness≤110mg/L of water is produced, what removal rate can be stablized is maintained at more than 90%；When into
During water silica≤80mg/L, the removal efficiency of silica can reach more than 99%, that is, ensure water outlet silica
＜ 1mg/L；When intake silica ＞ 70mg/L when, treatment effect can reach 98%.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (3)
1. it is a kind of removal industrial wastewater in the system of silica and hardness, which is characterized in that it include regulating reservoir, reaction tank,
Flocculation basin, sedimentation basin, discharge bay, magnesia tank, sodium metaaluminate tank and PAM tanks, the regulating reservoir, the reaction tank, the wadding
Solidifying pond, the sedimentation basin and the discharge bay are arranged side by side and are sequentially communicated；Wherein, between the regulating reservoir and the reaction tank
Pool wall bottom offer port, the pool wall top between the reaction tank and the flocculation basin be equipped with overflow port, the flocculation
Port is equipped in the middle part of pool wall between pond and the sedimentation basin, the pool wall top between the sedimentation basin and the discharge bay is set
Have overflow port, the bottom of pond of the sedimentation basin and the feed inlet of filter press are connected by sludge pipe, the magnesia tank and it is described partially
Sodium aluminate tank is connect with the reaction tank by pipeline, and the PAM tanks are connect with the flocculation basin by pipeline；
Rotation is equipped with mixing and blending machine in the reaction tank, and rotation is equipped with flocculation stirring machine in the flocculation basin, described
Rotation is equipped with mud scraper in sedimentation basin.
2. the system of silica and hardness in a kind of removal industrial wastewater according to claim 1, which is characterized in that described
The port on pool wall between the blade of flocculation stirring machine and the flocculation basin and the sedimentation basin is concordant.
3. the system of silica and hardness in a kind of removal industrial wastewater according to claim 1 or claim 2, which is characterized in that
The regulating reservoir, the reaction tank, the flocculation basin and the discharge bay bottom of pond be equipped with evacuated tube.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108059269A (en) * | 2017-09-26 | 2018-05-22 | 内蒙古久科康瑞环保科技有限公司 | The system and technique of silica and hardness in a kind of removal industrial wastewater |
| CN109052604A (en) * | 2018-08-15 | 2018-12-21 | 新疆水处理工程技术研究中心有限公司 | A kind of efficient desiliconizing agent |
| CN109319910A (en) * | 2018-11-05 | 2019-02-12 | 博天环境集团股份有限公司 | A kind of composite drug and its application for the water inlet of mine water evaporative crystallization except silicon |
| CN110818137A (en) * | 2019-11-22 | 2020-02-21 | 北京翰祺环境技术有限公司 | Sewage treatment system and sewage treatment method for efficiently removing hardness and silicon |
| CN111153540A (en) * | 2019-04-29 | 2020-05-15 | 内蒙古晶泰环境科技有限责任公司 | Salt separation system and process for ensuring quality of crystallized salt in high-salinity wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108059269A (en) * | 2017-09-26 | 2018-05-22 | 内蒙古久科康瑞环保科技有限公司 | The system and technique of silica and hardness in a kind of removal industrial wastewater |
| CN109052604A (en) * | 2018-08-15 | 2018-12-21 | 新疆水处理工程技术研究中心有限公司 | A kind of efficient desiliconizing agent |
| CN109319910A (en) * | 2018-11-05 | 2019-02-12 | 博天环境集团股份有限公司 | A kind of composite drug and its application for the water inlet of mine water evaporative crystallization except silicon |
| CN109319910B (en) * | 2018-11-05 | 2022-06-03 | 博天环境集团股份有限公司 | Composite medicament for removing silicon by mine water evaporation crystallization water inflow and application thereof |
| CN111153540A (en) * | 2019-04-29 | 2020-05-15 | 内蒙古晶泰环境科技有限责任公司 | Salt separation system and process for ensuring quality of crystallized salt in high-salinity wastewater |
| CN111153540B (en) * | 2019-04-29 | 2024-02-02 | 内蒙古晶泰环境科技有限责任公司 | Salt separation system and technology for guaranteeing quality of high-salt wastewater crystalline salt |
| CN110818137A (en) * | 2019-11-22 | 2020-02-21 | 北京翰祺环境技术有限公司 | Sewage treatment system and sewage treatment method for efficiently removing hardness and silicon |
| CN110818137B (en) * | 2019-11-22 | 2022-06-24 | 北京翰祺环境技术有限公司 | Sewage treatment system and sewage treatment method for efficiently removing hardness and silicon |
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