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Phosphorus-removing filling and preparation method thereof

A technology of raw material and bentonite, which is applied in the field of phosphorus removal filler and its preparation, can solve the problems of unstable raw material composition, unstable adsorption performance, low adsorption efficiency, etc., and achieves the effects of strong porosity, high efficiency and simple preparation method.

Inactive Publication Date: 2017-09-22
ZHONGSHAN ZHONGKAI ENVIRONMENTAL PROTECTION EQUIP MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The demand for phosphorus removal fillers is relatively large, but the fillers currently on the market have low adsorption efficiency, high cost, and the adsorption is easy to be saturated and needs to be replaced frequently. In addition, due to the instability of the raw material composition, the adsorption performance is unstable and affects the water outlet effect.

Method used

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  • Phosphorus-removing filling and preparation method thereof

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preparation example Construction

[0039] The present invention also provides a preparation method for phosphorus removal filler, comprising the following steps:

[0040] Add bentonite, activated alumina, and adhesive to the acidic solution for activation;

[0041] and baking and cooling to obtain the modified bentonite phosphorus removal filler.

[0042] The volume fraction of the above acid solution is 3-7%, such as 3%, 4%, 5%, 6% or 7%.

[0043] The above-mentioned acidic solution can be exemplified by sulfuric acid solution or hydrochloric acid solution, etc., preferably sulfuric acid solution. The role of acidity is to provide an acidic reaction environment by decomposing hydrogen ions, which is more conducive to the mixing and activation of modified activated alumina, natural bentonite and adhesive to obtain modified bentonite with better adsorption.

[0044] Preferably, the activated alumina is modified activated alumina; the modification step is specifically:

[0045]Take the activated alumina, wash ...

Embodiment 1

[0055] A preparation method for phosphorus removal filler, comprising the following steps:

[0056] (1) Preparation of modified activated alumina: take activated alumina and wash it with deionized water until there is no inorganic impurities on the surface, filter the cleaned activated alumina and dry at 100°C. Add the dried activated alumina to the aluminum sulfate solution with a concentration of 0.025mol / L, shake at 21°C at a vibration speed of 110r / min, take it out after shaking for 3 hours, wash it with deionized water for several times, and filter it at 100 °C drying; then baked at 500 °C for 4 hours to obtain modified activated alumina, grind the modified activated alumina and pass through a 100-mesh sieve to obtain modified activated alumina with a particle size of 100 mesh.

[0057] (2) Get natural bentonite and pass through a 200 mesh sieve to obtain bentonite with a particle size of 200 mesh.

[0058] (3) 200 mesh bentonite, 100 mesh modified activated alumina, adh...

Embodiment 2

[0061] A preparation method for phosphorus removal filler, comprising the following steps:

[0062] (1) Preparation of modified activated alumina: take activated alumina and clean it with deionized water until there is no inorganic impurities on the surface, filter the cleaned activated alumina and dry at 110°C. Add the dried activated alumina to the aluminum sulfate solution with a concentration of 0.026mol / L, shake at 23°C at a vibration speed of 120r / min, take it out after shaking for 3.2h, wash it with deionized water for several times, and filter it in Dry at 110°C; then bake at 540°C for 4.2 hours to obtain modified activated alumina, grind the modified activated alumina and pass through a 150-mesh sieve to obtain modified activated alumina with a particle size of 150 mesh.

[0063] (2) Get natural bentonite and pass through a 250-mesh sieve to obtain bentonite with a 250-mesh specification.

[0064] (3) 250 mesh bentonite, 150 mesh modified activated alumina, adhesive,...

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Abstract

The invention discloses phosphorus-removing filling and a preparation method thereof. The phosphorus-removing filling is prepared from the following raw materials in parts by mass: 75 to 80 parts of bentonite, 10 to 15 parts of active aluminum oxide and 3 to 6 parts of an adhesive. According to the phosphorus-removing filling disclosed by the invention, natural bentonite is modified by adopting the active aluminum oxide, the adhesive and sulfuric acid, so that the obtained modified bentonite has a larger specific surface area and stronger porosity; the phosphorus-removing filling has a stronger adsorption effect and a high phosphorus-removing capability, and high phosphorus-removing efficiency is ensured.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a phosphorus removal filler and a preparation method thereof. Background technique [0002] With the continuous increase of human activities, the nitrogen and phosphorus pollution of the water body is becoming more and more serious. At the same time, the national environmental protection policy requires that the TP standard of the effluent is becoming more and more stringent, in order to prevent the eutrophication of the water body caused by the ultra-high nitrogen and phosphorus sewage. Therefore, effectively reducing the content of phosphorus in discharged wastewater is an important way to prevent and control water eutrophication. At present, the methods of phosphorus removal at home and abroad mainly include chemical precipitation method, adsorption method, biological method, filtration method and so on. [0003] Phosphorus removal by adsorption method is to use the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28
CPCB01J20/08B01J20/12B01J2220/42C02F1/281C02F2101/105
Inventor 龚敏梁灵枝黄欣燕黄超胡昌顺
Owner ZHONGSHAN ZHONGKAI ENVIRONMENTAL PROTECTION EQUIP MFG CO LTD
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