Preparation method of porous scale inhibition ceramic and application thereof

A scale and ceramic technology, applied in the field of preparation of porous scale inhibitors, can solve the problems of slow-release phosphate scale inhibitor particle shape collapse, short service life, affecting scale life, etc., to achieve large water flux and resistance The effect of scale life

Active Publication Date: 2021-06-01
BEYCLEAN ENVIRONMENTAL PROTECTION TECH
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AI Technical Summary

Problems solved by technology

However, its disadvantage is that the slow-release phosphate antiscalant particles may collapse in shape during use, which greatly affects the anti-scaling life.
[0005] That is to say, during the use of the current antiscalant, it is still difficult to control the slow release of active ingredients, the service life is short, and the antiscalant occupies a large space.

Method used

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  • Preparation method of porous scale inhibition ceramic and application thereof
  • Preparation method of porous scale inhibition ceramic and application thereof
  • Preparation method of porous scale inhibition ceramic and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] This embodiment provides a method for preparing a scale-inhibiting porous ceramic membrane, including:

[0096] (1) According to the mass ratio of 20 parts of ammonium dihydrogen phosphate, 40 parts of diatomaceous earth, 10 parts of calcium oxide, 20 parts of kaolin, and 10 parts of CMC solution with a mass fraction of 5%, the above powder is placed in a mixer at 1000r / min speed stirring 20min granulation;

[0097] (2) Place the prepared ceramic pellets in a stainless steel mould, press under a dry press with a pressure of 2 t, and obtain a green body of a scale-inhibiting ceramic porous membrane after demoulding and dry it;

[0098] (3) Place the dried scale-inhibiting ceramic porous membrane green body in an industrial electric furnace for sintering. The sintering process is as follows: heating up to 200°C, heating rate 5°C / min, holding at 200°C for 1 hour, continuing to heat up to 600°C, and heating The rate is 5°C / min, the temperature is kept at 600°C for 1 hour,...

Embodiment 2

[0103] This embodiment provides a method for preparing a porous scale-inhibiting ceramic membrane, including:

[0104] A. Preparation of precursor powder:

[0105] (1) Mix the two powders according to the mass ratio of 10 parts of disodium hydrogen phosphate and 90 parts of diatomaceous earth, and place them in a mixer to stir at a rate of 1000r / min for 10 minutes. The powder is passed through a 300-mesh sieve to obtain a powder;

[0106] (2) The powder is packed in a sagger, and placed in an industrial electric furnace for heat treatment to obtain the scale-inhibiting porous ceramic precursor powder;

[0107] (3) The heat treatment method is: heating up to 200°C with a heating rate of 5°C / min, and holding at 200°C for 1 hour, then heating up to 800°C, with a heating rate of 5°C / min, and holding at 800°C for 2 hours to obtain the precursor powder , its XRD and SEM are detailed in image 3 and Figure 4 .

[0108] B. Preparation of scale-inhibiting porous ceramic membrane:...

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Abstract

The invention relates to a preparation method of porous scale-inhibiting ceramic and an application thereof, and the preparation method comprises the following steps: mixing hydrogen phosphate, an inorganic porous material, an auxiliary agent, a pore-forming agent and an adhesive, and then sequentially forming and sintering to obtain the porous scale-inhibiting ceramic. According to the preparation method provided by the invention, the prepared scale-inhibiting composite porous ceramic can be directly used for filtering domestic water, meanwhile, efficient control of release of active components in the porous scale-inhibiting ceramic is also realized, phase transformation from an amorphous phase to a high-temperature phase occurs in hydrophosphate in the sintering process, so that the hydrolysis rate of the porous scale-inhibiting ceramic when meeting water is greatly reduced, the the slow release rate of the scale inhibitor of hydrogen phosphate is controlled, meanwhile, stable bonding is formed between the hydrophosphate and the inorganic porous ceramic matrix at the high temperature, even if the hydrophosphate is hydrolyzed, the structure of the hydrophosphate is still kept stable, and the flaky'collapse 'phenomenon cannot occur.

Description

technical field [0001] The invention relates to the field of scale inhibition, in particular to a preparation method and application of porous scale inhibition ceramics. Background technique [0002] At present, with the development of society and the strengthening of people's awareness of environmental protection, people's water quality requirements for domestic water are also getting higher and higher. Water filtration membranes are a very effective way to purify water and improve water quality. Many places in our country face the problem of water quality and water shortage. In addition, the water supply contains a large amount of calcium and magnesium ions, especially the drinking water with high alkalinity and high hardness in the north. After a long period of use, the inner wall of the pipeline equipment is easy to form a carbonate scale layer. Water containing calcium and magnesium ions will produce scale after heating. At present, the inorganic antiscaling materials ...

Claims

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Application Information

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IPC IPC(8): C04B35/14C04B35/622C04B38/06B01D39/20
CPCC04B35/14C04B35/622C04B38/068B01D39/2068C04B2235/3208C04B2235/349C04B2235/447C04B2235/6562C04B2235/6567
Inventor 秦黎明徐俊康杨晋贤谢昆杏刘传永雷通达
Owner BEYCLEAN ENVIRONMENTAL PROTECTION TECH
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