A device for extracting freshwater organic matter by combining reverse osmosis and resin

Abstract

The invention provides equipment for extracting organic matters of fresh water by combining reverse osmosis and resin. The equipment comprises a raw water supply unit, a pretreatment unit, a reverse osmosis concentration unit, a pH regulation unit, a finished liquid extraction unit, a water tank and a main control system, wherein the finished liquid extraction unit comprises an adsorption enrichment device, a leaching device and a dosing device; an entrance of the adsorption enrichment device is connected with the water tank; an exit of the leaching device and an exit of the dosing device are connected with the entrance of the adsorption enrichment device; a liquid discharge switch is arranged at the bottom of the adsorption enrichment device; the adsorption enrichment device in the finished liquid extraction unit adsorbs and purifies organic matters of fresh water in thick water; and after the organic solvent is removed, high-purity solid powder of organic matters of fresh water is obtained. The equipment for extracting organic matters of fresh water by combining reverse osmosis and resin, provided by the invention, has the advantages of simple structure, convenience in operation and high 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 reverse osmosis and resin. Background technique [0002] Freshwater organic matter (referred to as freshwater organic matter) refers to a type of natural macromolecular organic matter mixture in freshwater bodies that can pass through a 0.45μm filter membrane. It comes from animal and plant secretions and decomposition products of their residues. The composition and structure are time-space and source And change. Freshwater organic matter has important ecological and environmental effects. For example, freshwater organic matter is the main substance that affects the color and taste of freshwater water, and it is an important regulator of water pH. It can interact with nutrients such as nitrogen and phosphorus and affect freshwater aquatic ecosystems. Freshwater organic matter interacts with a large number of toxic a...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned first utility model can automatically realize the enrichment and separation of dissolved organic matter in water, but it is limited to the separation of organic matter, and the degree of automation is not high, the steps are cumbersome, the operation is inconvenient, and high-concentration organic matter cannot be obtained; in addition, first The above-mentioned utility model patent is only applicable to the separation of organic matter in sewage and wastewater, and is completely inapplicable to fresh water or seawater; secondly, there is no nanofiltration process in the system disclosed in the above-mentioned utility model patent, resulting in low separation efficiency of organic matter; Again, the general organic matter of the International Humic Acid Society (IHSS) is divided into humic acid and fulvic acid, and there is no such thing as hydrophilic acidity, hydrophilic neutrality, hydrophilic alkalinity, hydrophobic alkalinity, and hydrophobic acidity disclosed in the utility model. , hydrophobic and neutral components, and the above components are different from the components of the organic matter protected by the present invention

[0007] The second utility model can realize the removal of anions and cations in water through an anion-cation exchange mixed bed filter column, which 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 matter Acids (such as humic acid and fulvic acid account for about 50-90%), most of fulvic acid and humic acid ionize into anions in neutral and near-neutral water bodies, this utility model uses anion exchange resin to remove anions in water bodies At the same time, a large amount of organic matter will be adsorbed, 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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