SU823309A1 - Method of waste water purification from emulsified and dissolved oils - Google Patents

Description

(54) METHOD FOR CLEANING WASTE WATER FROM EMULATED AND DISSOLVED OILS of the purification method from emulsified and dissolved oils. This goal is achieved by the fact that, when a known method is used, hydrochloric waste of titanium-magnesium production neutralized with lime milk, i.e., is used as a demulsifier and adsorbent. the emulsifier and the adsorbent are injected simultaneously. In Tiatano-Magnesium plants there is a rather significant amount of hydrochloric waste generated during the washing of equipment with hydrochloric acid, pickling metal ingots and products in hydrochloric acid, and in water gas cleaning during the neutralization of gases containing hydrogen chloride, when breaking solid chloride waste, etc. After neutralization to a pH of 9-10 with lime milk, sugary waste is a multifunctional reagent, a gent and contains g / l of CaCIj 10-20, KCl 3-6; NaC 1.5-3; CaCO-} 3-5; Ca (OH), 2 0.2-0.4; Re (OH) e 0.6-1.2. In the neutralized wastes of the deemulants, calcium, potassium, and sodium chlorides, calcium carbonate, calcium hydroxide, and iron hydroxide adsorbents are used. The method is carried out in a b. Succinic wastes containing CaCl, KS 1, NaCl, CaCO, Ca (0y) 2, Pe {OI) e in the amount of 15–25 vol. For 10 minutes, the drains are settled down to 1 hour. The cleaning process is carried out without preheating at a specific temperature. Thanks to the presence of the CaClg, NaCi, KCl demulsifying agents, the emulsion is destroyed, the heavy oils are adsorbed by CaCO, Ca (OH) 2.Fe (OH) -i, and together with them are deposited on the bottom of the settler. There are no oils in purified water. The amount of reagent (15-25-vol.% O.t of wastewater) is selected on the basis of the experiments, the introduction of the reagent in. the amount of more than 25% is impractical, so. how complete oil clearance is achieved already. at 25%. With the introduction of less than 15% of the reagent, complete purification is not achieved. PRI me R. Waste water containing 105 and 142 mg / l of emulsified and dissolved oils is treated with hydrochloric waste from one of the titanium and magnesium plants. Succinate solutions, neutralized with lime milk to a pH of 9-10, contain, g / l: 10.2 and 19j8 calcium chloride, 3.1 and 6.0 potassium chloride, 1.5-3 sodium chloride, as well as 3.5 - and 5.0 calcium carbonate, 0.2 and 0.4) g, respectively, 0.6 and 1.2 Fe (OH) h. The results of cleaning are given in table. 1. The simultaneous simultaneous introduction of an emulsifier and an adsorbent in the form of waste provides for a more complete purification of water from oils. When these reagents are separately administered in purified water, 4.5-8.0 mg / l oil remains. Comparative results of simultaneous introduction of reagents and separate are shown in Table. 2. Thus, the technical and economic advantage of this method is that 4TCi use the hydrochloric acid waste in titanium-magnesium production, neutralized with lime milk, to purify waste water from emulsified and dissolved. It allows to achieve complete purification, eliminate the use of commercial products as chemical reagents for water purification, simplify the technological scheme, i.e. the method of cleaning can now be carried out in one step, the reagents are introduced simultaneously and immediately in full. Table 1

19.86.03.03D0.41.2

19.86.03.03D0.41.2

10,23,11,51,50,20,6

10,23,11,53,50,20,6

10.2 3.1 1.5 3.5 0.2

25

5.8

Not found

0.3

Undecided shotgun

142

0.6

Also

Simultaneous administration of reagents

Claims (3)

1. A method for purifying waste water from emulsified and dissolved oils by introducing a demulsifier and an adsorbent characterized in that In order to increase the degree of purification and simplify the process technology, a demulsifier and adsorbent are used to use hydrochloric waste from titanium-magnesium production neutralized with lime milk. 2. A method according to claim 1, characterized in that the hydrochloric acids from T a b l and tsga 2 strokes after neutralization to pH 9-10 | contain, g / l; . CaClj 10-20} KS 1 3-6, NaCl 1.5-3; CaCOq3-5; Ca (OH) 2 O, 3-0, 4; Fe (OH) 0.6-1.2. About Information sources, taken into account in the examination 1.Milovanov L.V. Wastewater treatment of non-ferrous metallurgy enterprises. M., Mets1llurgi, published. 1971, p. 157. 2. The patent of Germany No. 1302151, cl. 85 with 1, pub. 1970. 3. The UK patent number 1321059 Cl. With 1 With, pub. 1973.