CN1215701A

CN1215701A - Method for treatment of high hardness flourine-contg. drinking water with food nutrient

Info

Publication number: CN1215701A
Application number: CN 97102707
Authority: CN
Inventors: 梁立达
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-01-18
Filing date: 1997-01-18
Publication date: 1999-05-05

Abstract

A process for treating high-hardness F-containing drinking water with food nutrients is chemically based on precipitation reaction for purifying and separation, and includes such steps as the reaction of the drinking water whose F content is higher than the value defined in associated standard with food-grade calcium phosphate to generate water-in soluble calcium fluorophosphate to reduce its content of F ions, separating precipitated matter, and addition of less phytic acid to prevent the water from scaling when boiling it.

Description

A kind of method that contains fluorine drinking water with food nutrition agent processing high rigidity

The present invention relates to a kind of method that contains fluorine drinking water with food nutrition agent processing high rigidity.

The many areas of China are the drinking water source with the underground water of high rigidity, and high rigidity causes the serious fouling of cooker, not only wastes energy, and also brings inconvenience to resident living; Some areas are because the association relationship of element causes the fluorion in the hard water to exceed standard, though because CaF ₂Solubility product less, make that the F-concentration in the drinking-water generally is no more than 2mg/L, (Drinking Water in China standard code F-≤1mg/L) but long-term drinking fluorine superstandard drinking water can form fluorine spot tooth also can be detrimental to health when serious.

At present, the method for fluorochemical mainly is in the reduction tap water: physisorphtion.Make tap water by the interior water purifier that sorbent materials such as gac, activated alumina, molecular sieve are housed, make that fluorion is adsorbed and reduces in the standard in the water.The large purification device is used for central water supply; Small-sized water purifier is mainly used in household drinking water.Large-scale cleaner is purified waste water the supply resident as whole domestic waters with the expensive fluorine that falls, and this is extremely irrational economically also to be to be difficult to bear, and facts have proved that large-scale fluoride removing purifier does not have practicality.The problem that family's small-sized water purifier exists is: 1. behind the saturated inactivation of expensive sorbent material filter core, should in time change, otherwise can make the objectionable impurities desorb that has been adsorbed cause effluent quality poorer, even cause the health accident.Because user's water consumption difference, so it is also different to change the cycle of sorbent material, yet sorbent material but can not show its saturated inactivated state automatically, thereby causes confusion to changing the core operation; 2. though the ultra-filtering element of small-sized water purifier can be held back microparticals such as bacterium, hardness-calcium, magnesium ion in can not filtered water, and the absorption filter core also can not adsorb calcium, magnesium ion.That is to say water purifier only can fall fluorine and can not reduce water hardness.For the user, the reduction of fluorion is invisible, and the fouling that hardness causes is intuitively.After spending hundreds of unit and buying a water purifier, the cooker fouling that remains unchanged is serious, and nature can lose interest to water purifier.Therefore, the use of high hardness area water purifier is not general.

Obviously, exploitation is a kind of can fall the safety method that fluorine again can scale inhibition and have crucial meaning.

The present invention is a kind of chemical treatment method that is suitable for family's operation, in the high rigidity tap water that fluorochemical exceeds standard, add the calcium phosphate or the refining bone meal of food grade of very a spot of food nutrition agent level, fully stir, water-fast calcium phosphate combines with fluorion in the water, form more insoluble calcium monofluorophosphate precipitation, make the content of fluoride ion in the water be minimized up to standard, after the precipitate and separate, the unboiled water of handling is added the kettle of cooking a meal, drip the nontoxic natural additive for foodstuff nucite hexamethyl phosphoric acid of high safety that about 50ppm extracts simultaneously from grain and oil crop embryo benevolence, at once with unboiled water in calcium, magnesium ion is combined into the insoluble calcium magnesium salts grain of this additive fully, becomes the incrustation scale (calcium of constantly separating out in the process of heating up water, magnesium ion carbonate) nucleus.Thereby reached the purpose that stops fouling owing to changed the crystallization behavior of incrustation scale.

The refining bone meal of food grade phosphoric acid calcium, food grade is calcium, the phosphorus nutrition reinforcer in the infant foods such as baby's milk-replacers; The nucite hexamethyl phosphoric acid also is a kind of nutrition agent as the natural phant phosphide, is widely used as foodstuff additive.The two with tap water in harmful ionic bond that maybe needs to remove (reduction) become infusible precipitate from water body, to remove, do not have the residue problem of moving back to the original place of residence.Precipitin reaction is chemical fundamentals of the present invention.Utilize the fluorochemical in the food nutrition agent removal drinking-water and carry out scale inhibition, thereby the security that obtains top is the technical characteristic of maximum of the present invention.

Present method totally nontoxic, safe, family's self-insurance is easy and simple to handle, and expense is cheap to be to solve high rigidity to contain a kind of ideal method that fluorine, scale inhibition problem fall in fluorine drinking water.

With embodiment the present invention is further described below:

The method that usefulness the food nutrition agent processing high rigidity that the present invention proposes contains fluorine drinking water with precipitin reaction as chemical fundamentals.Method comprises defluorination reaction, precipitate and separate, interpolation nucite hexamethyl phosphoric acid, boils, clarifies several steps.Add 5g food grade phosphoric acid calcium or the refining bone meal of food grade fully stirs, the standing separation precipitation to fluorine-containing drink in the unboiled water of 20L high rigidity.To inject kettle through the unboiled water 5L after the above-mentioned processing, add one of nucite hexamethyl phosphoric acid, after boiling, leave heating source, leave standstill a moment, obtain clarifying boiling water after the grain slag sedimentation, content of fluoride ion is reduced to the 0.70mg/L of boiling water by the 1.56mg/L of unboiled water, reached the standard of national tap water, simultaneously just no longer fouling of cooker.

Claims

1. handle the method that high rigidity contains fluorine drinking water with the food nutrition agent for one kind, it is characterized in that utilizing the water-fast precipitation of fluorion reaction generation in the refining bone meal of food grade phosphoric acid calcium or food grade and the fluorinion concentration superstandard drinking water, the dosage of calcium phosphate or refining bone meal with precipitate and separate after content of fluoride ion≤1mg/L in the tap water exceed.

2. as claimed in claim 1ly handle the method that high rigidity contains fluorine drinking water for one kind, it is characterized in that utilizing whole food nutrition agent nucite hexamethyl phosphoric acid as the Scale inhibitors when falling high rigidity tap water behind the fluorine in heated and boiled with the food nutrition agent.