CN1299796C - Filter material modification and dynamic adding medicament intensive filtration method - Google Patents
Filter material modification and dynamic adding medicament intensive filtration method Download PDFInfo
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- CN1299796C CN1299796C CN 200410043663 CN200410043663A CN1299796C CN 1299796 C CN1299796 C CN 1299796C CN 200410043663 CN200410043663 CN 200410043663 CN 200410043663 A CN200410043663 A CN 200410043663A CN 1299796 C CN1299796 C CN 1299796C
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- medicament
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- filtration
- filtrate
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Abstract
The present invention discloses a method for intensifying a filter effect by utilizing the modification of a filter material and the dynamic addition of a medicament water feeding and sewage treatment-an intensive filtration method of using the modification of a filter material and the dynamic addition of a medicament. The present invention comprises the steps as follows: (1), the modification treatment that the negative electricity of the surface of the filter material is reduced or the positive electricity of the surface of filter material is enhanced before filtration; (2), the continuous addition of an intensive filtration medicament in water in the process of filtration. In the modification of the filter material, the surface of the filter material is modified by a chemical method or a certain medicament to form particles with the surfaces containing the components of ferrum, manganese, calcium, silicon, magnesium, aluminum, etc. so that the surface potential of the filter material is enhanced, the absorbability to the impurity particles is added, and then the particles are easy to deposit on the surface of the filter material. In the process of filtration, the medicament is dynamically added so that the surface potential of colloidal particles in the water is enhanced and the absorbability of the colloidal particles on the surface of the filter material is enhanced. Due to the organic combination of the two steps, the present invention enhances the absorbability of the colloidal particles on the surface of the filter material in the water and intensifies the removal of turbid components in the water.
Description
Technical field:
The present invention relates to utilize modification of filtration medium and dynamically add the method that medicament comes the intensive filtration effect in a kind of feedwater and the sewage disposal, to improve effluent quality.
Background technology:
Giving the filter process in water treatment or the advanced treatment of wastewater is the important barrier that ensures water quality, and filter process is mainly removed impurity in the water by effects such as mechanical retention, absorption, contact flocculation and surface complexations.Existing filtering technique mainly with quartz sand, anthracite, haydite etc. as filter medium, adopt individual layer filtrate or double-layer filter material to filter, remove graininess, suspension pollutant in the water.But existing filter method treatment effeciency is not high, delivery turbidity is higher relatively, particularly lower for low temperature, low-cloudy water treatment effeciency, and in the turbidity except containing a certain amount of humic acid, also contain a certain amount of organic and inorganic pollution, therefore, strengthening suspension composition or the turbidity composition removed in the water, is vital for improving drinking water quality.Forefathers are mainly adopting following method to carry out intensive filtration aspect the water treatment filtration: 1) improve the filtrate grating with bilayer or multilayer filtrate, the bigger coarse media of particle diameter is adopted on top, and the less fine filtering material of particle diameter is adopted in the bottom, has improved containing of filter tank of dirty ability; 2) change the direction of a stream of water, adopt anti-granularity to filter, prolonged filter cycle; 3) adopt fiber and other material to filter, improved the effect of holding back impurity in the water; 4) micro flocculating filter or directly filtration reduce the process system investment, are beneficial to low-cloudy water and handle.Though above method has certain effect,, generally have a spot of negative electrical charge and take off steady colloidal solid in the water because filter material surface generally has elecrtonegativity, because of taking off the repulsion effect between steady colloidal solid and filter material surface, and be difficult for adhering at filter material surface, thereby can penetrate the filter tank, make water quality deterioration.
Summary of the invention:
To take off steady colloidal solid because of being not easy attached to the problem on the filtrate in order solving,, thereby to improve the removal efficient of filtrate impurity in the water by the method for change filtrate and colloidal solid band like charges with filtrate band like charges.The present invention realizes by following proposal: a kind of modification of filtration medium with dynamically add medicament intensive filtration method, it is finished by following step: (one) is before filtration, filtrate is reduced the filter material surface elecrtonegativity, improve the electropositive modification of filter material surface and handle; (2) in filter process, Xiang Shuizhong continues to add the intensive filtration medicament.In step (two), add simultaneously as the potassium permanganate of oxidant or potassium ferrate or as polyacrylamide, activated silicic acid, HCA, ferric-polysilicate or the aluminium silicate polymer of macromolecule flocculation aid with the intensive filtration medicament; Described intensive filtration medicament is polymeric aluminum, aluminum sulfate, polymerization iron, iron chloride, ferric sulfate, aluminium hydroxide, CaCl
2In one or more.Operation principle of the present invention is as follows: one, modification of filtration medium be by chemical method or by certain medicament in the filter material surface effect, formed the surperficial particle that contains compositions such as iron, manganese, calcium, silicon, magnesium, aluminium, improved the filter material surface current potential, increased the absorption property of filter material surface, made the steady colloidal solid that takes off in the water be easy to deposit at filter material surface to impurity particle in the water.The 2nd, in filter process, dynamically add medicament to improve the surface potential of water-borne glue body particle, improve the characterization of adsorption of colloidal solid, thereby dynamically strengthen removal turbidity composition in the water at filter material surface.The combination of two kinds of methods has improved the characterization of adsorption of water-borne glue body particle at filter material surface, has strengthened the removal to turbidity composition in the water.That the present invention has is reasonable in design, reliable operation and have the advantage of big promotional value.
The specific embodiment:
The specific embodiment one: present embodiment is finished by following step: (one) reduces the filter material surface elecrtonegativity to filtrate before filtration, improves the electropositive modification of filter material surface and handles; (2) in filter process, Xiang Shuizhong continues to add the intensive filtration medicament.Described filtrate is the granule filter material of quartz sand, haydite, anthracite, garnet, iron ore, cordierite, mullite or aluminium titanates, traditional modification of filtration medium method is adopted in modification to filtrate, promptly use inorganic salts and filtrate effect, carry out drying, roasting afterwards, be prepared into the modified filter material that the surface has adsorption capacity filtrate.Described intensive filtration medicament is polymeric aluminum, aluminum sulfate, polymerization iron, iron chloride, ferric sulfate, aluminium hydroxide, CaCl
2In one or more.
The specific embodiment two: the difference of present embodiment and embodiment one is, adds simultaneously as the potassium permanganate of oxidant or potassium ferrate or as polyacrylamide, activated silicic acid, HCA, ferric-polysilicate or the aluminium silicate polymer of macromolecule flocculation aid with the intensive filtration medicament in step (two).Potassium permanganate or potassium ferrate as oxidant enter in the filter tank after blender mixes with the intensive filtration medicament.Changed the character of particle in the water by adding oxidant (potassium permanganate or potassium ferrate) with the macromolecule flocculation aid, thereby improved the removal efficient of filter process impurity particle in the water.Described blender uses common vessel to get final product.
The specific embodiment three: the difference of present embodiment and embodiment one is, in step (), before filtering, Xiang Shuizhong adds the surface modification medicament filtrate is carried out immersion treatment, make filter material surface be coated with the hydrolysate of stain layer of surface improved chemical or surface modification medicament, reduce the elecrtonegativity of filter material surface, improve the electropositive of filter material surface.Surface modification medicament to the filter material surface modification is formed by following one or more combination: polymeric aluminum, aluminum sulfate, polymerization iron, iron chloride, ferric sulfate, aluminium hydroxide, calcium chloride, polyacrylamide, activated silicic acid, HCA, ferric-polysilicate, aluminium silicate polymer, potassium permanganate, potassium ferrate or clorox.This kind modification of filtration medium method is fairly simple, and operation is lacked than conventional method.
The specific embodiment four: the difference of present embodiment and embodiment three is, in step (), in the filter back washing process or after the backwash, add the surface modification medicament, bubbling air in water, utilize air that the surface modification medicament is fully mixed with filtrate, be 0.5min～30min the time of contact between filtrate and the surface modification medicament, and described surface modification medicament kind is identical with embodiment three.
The specific embodiment five: the difference of present embodiment and embodiment one is, in step (), in double-bed filter, after filter back washing finishes, with the water emptying in the filter tank, (1～50mg/L) polymeric aluminum solution is driven in the filter tank by pump, and the volume of used polymeric aluminum solution is 2 times of filtrate volume, and polymeric aluminum pH value of solution value is 4～6 with finite concentration.Then air is fed in the polymeric aluminum solution polymeric aluminum solution medicament is fully mixed with filtrate, be 1～30min the time of contact between filtrate and the polymeric aluminum solution medicament.After reaction finishes, the water in the filter tank is drained, open filter tank Inlet and outlet water valve, filtration begins to carry out.
The specific embodiment six: the difference of present embodiment and embodiment two is, in step (two), the intensive filtration medicament is a polymeric aluminum, add potassium permanganate or potassium ferrate simultaneously with the intensive filtration medicament, the concentration of potassium permanganate or potassium ferrate is 0.1～2.0mg/L, and the concentration of polymeric aluminum solution is 0.1～15.0mg/L.
The specific embodiment seven: the difference of present embodiment and embodiment two is, continues to add polymeric aluminum solution and macromolecule flocculation aid in step (two), and polymeric aluminum enters in the filter tank after blender mixes with the macromolecule flocculation aid.The concentration of polymeric aluminum solution is 0.1～15.0mg/L, and the concentration of macromolecule flocculation aid is 0.01～1mg/L.
Claims (7)
1, a kind of modification of filtration medium with dynamically add medicament intensive filtration method, it is characterized in that it finishes by following step: (one) reduces the filter material surface elecrtonegativity to filtrate before filtration, improves the electropositive modification of filter material surface and handles; (2) in filter process, Xiang Shuizhong continues to add the intensive filtration medicament; In step (two), add simultaneously as the potassium permanganate of oxidant or potassium ferrate or as polyacrylamide, activated silicic acid, HCA, ferric-polysilicate or the aluminium silicate polymer of macromolecule flocculation aid with the intensive filtration medicament; Described intensive filtration medicament is polymeric aluminum, aluminum sulfate, polymerization iron, iron chloride, ferric sulfate, aluminium hydroxide, CaCl
2In one or more.
2, modification of filtration medium according to claim 1 with dynamically add medicament intensive filtration method, it is characterized in that described filtrate is the granule filter material of quartz sand, haydite, anthracite, garnet, iron ore, cordierite, mullite, pottery or aluminium titanates, traditional modification of filtration medium method is adopted in modification to filtrate, promptly use inorganic salts and filtrate effect, carry out drying, roasting afterwards, be prepared into the modified filter material that the surface has adsorption capacity filtrate.
3, modification of filtration medium according to claim 1 with dynamically add medicament intensive filtration method, it is characterized in that in step (), before filtering, Xiang Shuizhong adds the surface modification medicament filtrate is carried out immersion treatment, make filter material surface be coated with the hydrolysate of stain layer of surface improved chemical or surface modification medicament, reduce the elecrtonegativity of filter material surface, improve the electropositive of filter material surface, the surface modification medicament of filter material surface modification is formed by following one or more combination: polymeric aluminum, aluminum sulfate, polymerization iron, iron chloride, ferric sulfate, aluminium hydroxide, calcium chloride, polyacrylamide, activated silicic acid, HCA, ferric-polysilicate, aluminium silicate polymer, potassium permanganate, potassium ferrate or clorox.
4, modification of filtration medium according to claim 1 with dynamically add medicament intensive filtration method, it is characterized in that in step (), in the filter back washing process or after the backwash, add the surface modification medicament, bubbling air in water, utilize air that the surface modification medicament is fully mixed with filtrate, be 0.5min～30min the time of contact between filtrate and the surface modification medicament, and described surface modification medicament is formed by following one or more combination: polymeric aluminum, aluminum sulfate, polymerization iron, iron chloride, ferric sulfate, aluminium hydroxide, calcium chloride, polyacrylamide, activated silicic acid, HCA, ferric-polysilicate, aluminium silicate polymer, potassium permanganate, potassium ferrate or clorox.
5, modification of filtration medium according to claim 1 with dynamically add medicament intensive filtration method, it is characterized in that in step (), in double-bed filter, after filter back washing finishes, with the water emptying in the filter tank, with concentration is that the polymeric aluminum solution of 1～50mg/L is driven in the filter tank by pump, the volume of used polymeric aluminum solution is 2 times of filtrate volume, polymeric aluminum pH value of solution value is 4～6, then air is fed in the polymeric aluminum solution polymeric aluminum solution medicament is fully mixed with filtrate, be 1～30min the time of contact between filtrate and the polymeric aluminum solution medicament.
6, modification of filtration medium according to claim 1 with dynamically add medicament intensive filtration method, it is characterized in that in step (two), the intensive filtration medicament is a polymeric aluminum, add potassium permanganate or potassium ferrate simultaneously with the intensive filtration medicament, the concentration of potassium permanganate or potassium ferrate is 0.1～2.0mg/L, and the concentration of polymeric aluminum solution is 0.1～15.0mg/L.
7, modification of filtration medium according to claim 1 with dynamically add medicament intensive filtration method, it is characterized in that in step (two), continuing to add polymeric aluminum solution and macromolecule flocculation aid, polymeric aluminum enters in the filter tank after blender mixes with the macromolecule flocculation aid, the concentration of polymeric aluminum solution is 0.1～15.0mg/L, and the concentration of macromolecule flocculation aid is 0.01～1mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410043663 CN1299796C (en) | 2004-06-30 | 2004-06-30 | Filter material modification and dynamic adding medicament intensive filtration method |
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|---|---|---|---|
| CN 200410043663 CN1299796C (en) | 2004-06-30 | 2004-06-30 | Filter material modification and dynamic adding medicament intensive filtration method |
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| CN1593714A CN1593714A (en) | 2005-03-16 |
| CN1299796C true CN1299796C (en) | 2007-02-14 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891298B (en) * | 2010-07-30 | 2012-06-20 | Jck株式会社 | In-situ activation modification treatment method for suspended filter material |
| CN107244764A (en) * | 2017-05-26 | 2017-10-13 | 天津城建大学 | A kind of method of reclaimed water reuse processing |
| CN109422361B (en) * | 2017-08-29 | 2022-07-05 | 宝山钢铁股份有限公司 | Purification treatment method and system for circulating cooling water of rolling equipment |
| CN110078249B (en) * | 2018-01-25 | 2022-03-18 | 宝山钢铁股份有限公司 | Advanced treatment method and system for removing COD (chemical oxygen demand) and total iron in desulfurization wastewater of power plant |
| CN110950446B (en) * | 2018-09-27 | 2021-12-17 | 宝山钢铁股份有限公司 | Method and system for treating Kjeldahl nitrogen and total zinc in cold-rolling nanofiltration concentrated water |
| CN113019321A (en) * | 2021-03-04 | 2021-06-25 | 太原理工大学 | Coal-based particles, preparation method thereof and application thereof in filtering coal wastewater |
| CN113185024B (en) * | 2021-04-25 | 2022-11-25 | 北京魔砂科技有限公司 | Method for purifying condensed water |
| CN113426471B (en) * | 2021-06-28 | 2022-10-04 | 哈尔滨工业大学 | Dynamic preparation method and enhanced oxidation filtration application of nascent-state nano-layered manganese catalyst |
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