Method and device for coagulating-bath pelletizing forming of ammonium ion sieve with adjustable particle size

Abstract

The invention relates to the technical field of ammonium ion sieve forming and especially relates to a method and a device for coagulating-bath pelletizing forming of an ammonium ion sieve with adjustable particle size. The method is characterized by comprising the following steps: dissolving a macromolecule binder into an organic solvent to form a bonding solution; adding ammonium ion sieve powder into the bonding solution, and continuously stirring and mixing, thereby forming a pelletizing solution; preparing the pelletizing solution into ammonium ion sieve grains in the manner of coagulating bath under a stirring condition. The method has the beneficial effects that compared with traditional ion sieve and molecular sieve forming, the method takes coagulating-bath forming rather than high-temperature sinter forming as a forming principle, so that heat energy is saved, and the ammonium ion sieve can be formed at normal temperature; the grain size is adjustable, so that the whole pelletizing process is simple and convenient. The device for coagulating-bath pelletizing forming of the ammonium ion sieve with adjustable particle size integrates various functions of stirring and mixing, controlling the dripping speed and forming the granular ammonium ion sieve; due to the modularized design, the stirring, the dripping and the forming are integrated with each other; a simple and efficient pelletizing mode can be realized; the device is a convenient granular ammonium ion sieve forming device.

Description

technical field [0001] The invention relates to the technical field of ammonium ion sieve molding, in particular to an ammonium ion sieve coagulation bath granulation molding method and device with adjustable particle size. Background technique [0002] As the water environment has been paid more and more attention by people, ammonium treatment in ammonium-containing wastewater has become an important part of water treatment; ammonium ion sieve is an emerging adsorption material, and its excellent selectivity makes it widely accepted. People pay attention to it; however, the ion sieve is synthesized into a micron-sized powder material. If the powder is directly used for ammonia nitrogen adsorption, it will be easily lost in water, increasing the instability and complexity of the process, so its application must involve its granulation. Molding problem. [0003] At present, the granulation of ion sieves and molecular sieves in China mainly includes two categories: inorganic ...

AI Technical Summary

Problems solved by technology

At present, the high-temperature sintering and granulation method encounters two major problems: one is that the temperature of high-temperature sintering is above 600°C, and there is a problem of high energy consumption; performance shift issues

However, the main problem of this method is the strong hydrophobicity of PVC, which causes the adsorption performance of the ammonium ion sieve after granulation to decline by nearly 30%, and the adsorption rate also decreases greatly.

Some people use polyacrylic acid monomer reverse-phase polymerization to wrap ion sieves for molding (such as Zhang Qinhui et al., granular lithium ion sieves, 2010280.0.2010-9-14), the adsorption rate is fast, but the overall process is relatively cumbersome ; The current most common ion sieve granulation method is PVC granulation (such as Wu Yanfang, "MnO 2 Synthesis of Type Potassium Ion Sieve and Research on its Ion Exchange Behavior for K+", Ocean University of China, 2008), which first dissolves PVC in DMF, and then mixes ion sieve powder with a certain particle size into the solution to form granulation liquid, but the granulation material PVC in it has a strong hydrophobicity, which will cause the adsorption rate to drop greatly, so that the adsorption efficiency in actual use will be greatly reduced, and the reported adsorption rate will drop by one to two orders of magnitude

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