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Filter material modification and dynamic adding medicament intensive filtration method

A filtration method and technology of filter material, applied in chemical instruments and methods, filtration separation, separation method, etc., can solve the problem of not easily adhering to the filter material, etc.

Inactive Publication Date: 2005-03-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the destabilized colloidal particles are not easy to attach to the filter material due to the same charge as the filter material, the removal efficiency of the filter material to impurities in water is improved by changing the method that the filter material and the colloidal particles have the same charge.

Method used

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Experimental program
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Effect test

specific Embodiment approach 1

[0004] Specific embodiment one: this embodiment is accomplished through the following steps: (one) before filtering, the filter material is carried out to reduce the negative charge on the surface of the filter material, and improve the modification treatment of the positive charge on the filter material surface; (two) During the filtration process, the strengthening filter agent is continuously added to the water. The filter material is a particle filter material of quartz sand, ceramsite, anthracite, garnet, iron ore, cordierite, mullite or aluminum titanate, and the modification of the filter material adopts a traditional filter material modification method, That is, the inorganic salt is used to interact with the filter material, and then the filter material is dried and roasted to prepare a modified filter material with adsorption capacity on the surface. The enhanced filter agent is polyaluminum, aluminum sulfate, polyferric, ferric chloride, ferric sulfate, aluminum hyd...

specific Embodiment approach 2

[0005] Specific embodiment two: The difference between this embodiment and embodiment one is that in step (two), potassium permanganate or potassium ferrate as an oxidizing agent or polymer coagulant as a polymer coagulant is added simultaneously with the strengthening filter agent. Acrylamide, activated silicic acid, HCA, iron polysilicate or aluminum polysilicate. Potassium permanganate or potassium ferrate as an oxidizing agent is mixed with the strengthening filter agent through a mixer and then enters the filter pool. By adding oxidant (potassium permanganate or potassium ferrate) and polymer coagulation aid, the properties of particles in water are changed, thereby improving the removal efficiency of impurity particles in water during the filtration process. The mixer can use a common container.

specific Embodiment approach 3

[0006] Specific embodiment three: the difference between this embodiment and embodiment one is that in step (1), before filtering, the filter material is soaked by adding medicament to water, so that the surface of the filter material is coated with a layer of medicament or The hydrolysis product of the agent reduces the negative charge on the surface of the filter material and increases the positive charge on the surface of the filter material. The agent for modifying the surface of the filter material is composed of one or more of the following: polyaluminum, aluminum sulfate, polyferric, ferric chloride, ferric sulfate, aluminum hydroxide, calcium chloride, polyacrylamide, activated silicic acid , HCA, iron polysilicate, aluminum polysilicate, potassium permanganate, potassium ferrate or sodium hypochlorite. This kind of filter material modification method is relatively simple, and the process is less than the traditional method.

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Abstract

The invention relates kinds of method for intensifying filter effictiveness with filter-media modification and dynamic casting of medicine in treatment of water and sewage water, the filter-media modification and dynamic casting of medicine intensifying filter effictiveness method. This invention can be through with the steps as follows: (1) before filtering, decline negative electricity in surface of filter media, or increase modified ability of positive electricity in surface of filter media; (2) in procedure of filtering, cast medicine for intensifying filter efficiency continually. The step of (1) can germinate the particle, in surface of which contains the elements such as Iron, Manganese, Calcium, Silicon, Magnesium, Aluminum, and so on. So it increases electric potential to the surface of filter media, improves absorbability of impurity particle and makes this granule be prone to depositing in the surface of filter media. The step of (2) increases electric potential to the surface of colloidal particle in water by casting medicine for intensifying efficiency continually in filtering procedure, so that it can increase absorbability of colloidal particle in the surface of filter media. The organic association with couple of devices can increase absorbability of colloidal particle in the surface of filter media in water, and intensify removal ability of turbidity in water.

Description

Technical field: [0001] The invention relates to a method for enhancing the filtering effect by modifying filter materials and dynamically adding chemicals in water supply and sewage treatment, so as to improve the quality of effluent water. Background technique: [0002] The filtration process in water supply treatment or advanced sewage treatment is an important barrier to ensure water quality. The filtration process mainly removes impurities in water through mechanical retention, adsorption, contact flocculation and surface complexation. The current filtration technology mainly uses quartz sand, anthracite, ceramsite, etc. as filter media, and uses single-layer filter material or double-layer filter material for filtration to remove particulate and suspended pollutants in water. However, the current filtration method has low treatment efficiency, and the turbidity of the effluent is relatively high, especially for low-temperature, low-turbidity water. The treatment effici...

Claims

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Application Information

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IPC IPC(8): B01D37/00B01D37/03
Inventor 马军范潇梦肖辉玉何文杰韩宏大
Owner HARBIN INST OF TECH
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