A device for extracting freshwater organic matter using two-stage resin

Abstract

The invention provides an apparatus for extracting organic matters in fresh water by using two-stage resin, comprising a raw water supply unit, a pretreatment unit, a reverse osmosis concentrating unit, a PH adjusting unit, a finished liquid extracting unit, a water tank and a master control system; the reverse osmosis concentrating unit herein separates purified water and concentrated water, the concentrated water enters a water tank again and is cyclically concentrated, a concentrating system is shut off when a compression ratio is suitable; the PH adjusting unit adjusts PH value of concentrated water, the adjusting process is full-automatic, labor is saved, production cost is reduced, and PH adjusting rate is high; first and second adsorption enriching device in the finished liquid extracting unit perform adsorption and purification and organic solvent removal on organic matters in the concentrated water so that high-purity fresh water organic solid powder can be obtained. The apparatus for extracting organic matters in fresh water by using two-stage resin is simple in structure, convenient to operate and high in yield.

Description

Technical field [0001] The invention relates to the field of organic matter extraction, in particular to a device for extracting freshwater organic matter by using a two-stage resin. Background technique [0002] Freshwater organic matter is a type of natural macromolecular organic compound that can pass through a filter membrane with a pore size of 0.45μm. It comes from animal and plant secretions and decomposition products of their residues. The composition and structure change with time and source. In freshwater bodies, organic matter has important ecological and environmental effects. For example, organic matter is the main substance that affects the color and taste of fresh water, and it is an important regulator of the pH of the water. It can interact with nutrients such as nitrogen and phosphorus and affect freshwater aquatic ecosystems. Organic matter interacts with a large number of toxic and harmful pollutants in freshwater bodies, thereby changing the migration and t...

AI Technical Summary

Problems solved by technology

[0005] This utility model can realize the removal of anions and cations in water through the anion-cation exchange mixed bed filter column, and can meet the needs of infrared, nuclear magnetic and other organic matter composition analysis; but there are also the following defects: ① The main subcomponent of organic matter is macromolecular organic acid ( For example, humic acid and fulvic acid account for about 50-90%), most of fulvic acid and humic acid are ionized into anions in neutral and near-neutral water bodies, and this utility model uses anion exchange resin to remove anions in water bodies at the same time , will adsorb a large amount of organic matter, resulting in the loss of acidic components in organic matter

At the same time, the protein-like organic matter in the organic matter is an amphoteric substance, which can be ionized into anion and cation in the water body. The utility model anion-cation mixed exchange resin will adsorb a large amount of protein-like organic matter, resulting in the loss of protein-like organic matter.

②This utility model patent is only applicable to freshwater organic matter, but it is not applicable to the extraction of seawater organic matter, because seawater contains a large amount of sodium ions, and reverse osmosis can easily cause sodium chloride crystallization and precipitation, which will damage the operation of the equipment; ③This practical The new patent uses an anion-cation mixed bed resin filter column to remove calcium ions, magnesium ions, chloride ions, sulfate ions, etc. in water, instead of using internationally accepted XAD resin for adsorption and collection of organic matter. The concentration of organic matter collected in this way is relatively low. Can not meet the demand for high concentration of organic matter in the experimental process

Therefore, this utility model cannot extract all organic matter components of all water bodies. In addition, this utility model has a complex structure, cannot realize effective automatic control, and has poor implementability

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