SU1255581A1 - Method of purifying waste water from suspended particles - Google Patents

Description

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The invention relates to methods for treating wastewater and can be used in the purification of wastewater from oil fields.

The purpose of the invention is to reduce the degree of water purification from suspended particles.

This goal is achieved by using as flocculant chlorine, aminoparaffin crat of the general formula C (5 H ,,,, which is administered in the amount of 10-100 mg / l.

Aminoparaffi hydrochloride (ANP-2 reagent) is obtained by nitrating petroleum paraffins, followed by hydrogenation and treatment with hydrochloric acid, and is used as a flotation reagent, demulsifier, corrosion inhibitor and reagent to prevent the formation of hydrogen sulfide.

The method is carried out as follows.

Purified water is poured into 1 liter beakers and the NaOH solution is added with stirring. After stirring, aminoparaffin hydrochloride nt hydrochloride is added. Stirring is continued for 5 minutes. Then the stirrer is stopped and the water is settled for 60 minutes, after which a sample of water is siphoned off and the degree of precipitation is determined.

PRI me R. In glasses with a capacity of l, 700 ml of waste water are poured and, stirring at a rate of 60-70 rpm, 5% NaOH solution is added to a concentration of 45 mg / l. Hydrogen indicator WATER - 8.2. After stirring for 1 min, add

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Floculine nt-hydrochloride aminoparaffin in various concentrations. Next. The solution is stirred for 5 min.

with a speed of 20-30 rpm. After 5 stops of the agitator, the water is settled for 60 minutes, then a sample is taken to determine the degree of clarification.

The best results of water purification from suspended substances using aminoparaffin hydrochloride are obtained at pH 8-9. When the pH value is below 8, the cleaning effect is reduced. With an increase in the pH value of Bbmie 9, the degree of purification does not decrease, but the amount of precipitate produced increases, and consequently, the costs for the disposal of the sludge.

The table shows the results of wastewater treatment from suspended solids by the known and proposed methods.

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The use of aminoparaffin hydrochloride as a fodokunt compared to the known one allows to increase the degree of clarification, eliminate the use of bactericides against sulfate-reducing bacteria, since aminoparaffin hydrochloride at a concentration of 100 mg / l is used as a bactericide, eliminates the introduction of corrosion inhibitors and simplifies the process of water purification by eliminating devices for dispersing, dissolving flocculants, since the reagent proposed is highly soluble in water of any salinity.

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Compiled A.Stadnik Editor I.Derbak Tehred M.Hodanich Proofreader A.Zimokosov

Order 4780/26 Circulation 864 Subscription

VNISHI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Table continuation

Claims (2)

1. A METHOD FOR WASTE WATER PURIFICATION FROM WEIGHTED PARTICLES by treating water with a flocculant, characterized in that, in order to increase the degree of purification, aminoparaffin hydrochloride of the formula C ₁₅ H _{? 1} NH ₂ · НС1 is used as a flocculant. 2. The method according to π.1, with the exception that aminoparaffin hydrochloride is administered mainly in an amount of 10-100 mg / L.