PL155568B3 - Sewage treatment process - Google Patents

Description

REPUBLIC

POLAND

PATENT DESCRIPTION

155 568

Additional patent to patent No. 150548

Reported: 88 08 28 / P 271519, /

Int. Cl. ⁵ CO2F 1/56

Priority

^A D OFFICE

PATENT

RP

Application announced:

Patent description published: 1992 03 31

Creators of the invention: Daniel Maksymiec, Mieczysław Zawadzki, Janusz Bereś,

Kazimierz Zawieruszyński, Zbigniew Oleksyn, Aleksander Olas, Ireneusz Ratajczak, Roman Tkaczyk, Zenon Wróbel

The holder of the patent: Institute of Heavy Organic Synthesis “BLACHOWNIA, Kędzierzyn-Koźle / Poland /

THE METHOD OF CLEANING

The subject of the invention is a method of purifying industrial waters, especially in water-sludge circuits of coal scrubbers.

There are known methods of purifying industrial waters which consist in separating solids from water by using the sedymentaaji phenomenon. The course of sedimentation improves significantly when aqueous solutions of flocculants are used. In water-sludge cycles of coal scrubbers, which are a water suspension of mineral particles, two-stage flocculation is most often used. First, an anionic flocculate, which improves the sedimentation of grains with a hydrophobic surface, and then a cationic flocculan, which facilitates the sedimentation of grains with a hydrophilic surface.

The subject of the main patent no. 150 548 is a method of treating wastewater generated in the stone industry and mining of minerals. According to this method, 1-100 ppm, based on the dry weight of component I, is added to the wastewater constituting an aqueous suspension of mineral particles, i.e. the dry matter of component II, i.e. a quaternary salt resulting from quaternization with methyl chloride, ethyl chloride or butyl chloride of an aliphatic amine with an average molecular weight of 265-285 or a synthetic amine with 5 moles of ethylene oxide.

In the process according to the invention, component II is added to the industrial waters in order to neutralize the electric charges of the mineral grains suspended in these waters, and then the mixture of components I and II is added.

As component I, polyacrylamide with an average molecular weight greater than that is used

500,000 modified polygon ^^ em ^) ntynthic polygon with an average msi-e frequency of 400. As

155 568

155 56Θ component II, acrylomethyldipolyoxyethylammonium chloride is used, obtained from an aliphatic amine with an average molecular weight of 265-285 l of hydrocarbon chain length ^ 8 ~ ^ 22 d °, with an average training of 5 ml. ethylene oxide. It is preferred to use a mixture of ingredients in which the weight ratio of component I to component II is 21.3: 1. It has surprisingly been found that the flocculation process gives better results. If, before adding an appropriate amount of the mixture of components I 1 II to the industrial waters, the electric charges of the mineral grains suspended in these waters are neutralized by the appropriate amount of component II.

Example. Preferably, before flocculation of the industrial water to the water-sludge circulation, component II is administered in the amount of 0.1-5 g per 1 Mg dry;) the mass of the sludge.

The 8% aqueous solution of Dia I is known commercially as Instar K-4 and the 50% alcohol solution of Component II is known as Kaminox R-5-RM. The neutral effect in water-sludge cycles of coal scrubbers can be obtained by introducing Kaminoks R-5-RM directly into the industrial circulating water tank in the amount of 1.2 g per 1 Mg of dry matter of the sludge, i.e. about 600 g of Kamiioksu R-5- RM within 1 hour with an average concentration of industrial water about 150 g / 1. The amount and garlic fed Kammnsu R-5-RM depends on the circulation capacity, the number of cooperating machines and devices as well as the composition of the quantity and quality of grains of mineral deposits.

In the process according to the invention, the flocculation of minerals is faster, and the consumption of flucules is the highest compared to the method according to the main patent No.

Claims (3)

Patent claims 1. Method of wastewater treatment, especially in water-sludge cycles of coal scrubbers, consisting in adding 1-100 ppm of component I to industrial waters containing an aqueous suspension of mineral particles, i.e. flocculants based on acrylamide, acrylic acid or their derivatives, in on a dry weight basis, preferably 10-30 ppm and 1-300 ppm of component II on a dry weight basis, i.e. a quaternary salt resulting from quaternization with mtil chloride, ethyl chloride or butyl chloride of an aliphatic amine with an average molecular weight of 265-285 or an amine ethoxylated with 5 moles of ethylene oxide, according to the main patent no. 150 548, characterized in that component II is added to industrial waters in order to neutralize the electric charges of the mineral grains suspended in these waters, followed by a mixture of components I and II. 2. The method according to claim 1, characterized in that a polyacrylamide with an average molecular weight above 500,000 is used as component I, a modified polyethylene glycol with an average molecular weight of 400. 3. The method according to claim 1, characterized in that acrylomethylthyethylammonium chloride obtained from an aliphatic ammonium chloride with an average molecular weight of 265-285 and a hydrocarbon chain length of Cg-C22 to which an average role of ethylene oxide is attached is used as component II.