SU952749A1 - Method for decarbonizing effluents and natural waters - Google Patents

Description

The invention relates to the purification of natural waters by decarbonization and can be used in the field of additional preparation for the preparation of water with low carbonate alkalinity. There is a method of degassing water by blowing it with air 1. The disadvantage of this method is the possibility of removing from the water only the gas component of carbon dioxide compounds. The closest to the invention in its technical nature is a method for decarbonating water, which includes acidification and purging with air of the treated fluid in a fluidized bed formed from cation exchanger, water and air. In this case, decarbonization occurs as a result of the replacement of ions and Md in hardness layers with hydrogen ions of a cation-exchange substance, and the carbon dioxide formed during the об-exchange process is removed from the water by air blowing I. A disadvantage of the known method is the low degree of water decarbonization and long duration of the process In addition, in the decarbonization process, the homogeneity of the pseudoCJ + liquefied layer changes due to the coalescence of the bubbles of the fluidizing agent, which helps to slow down the decarbonization process. The aim of the invention is to increase the degree of decarbonization and shorten the process time. The goal is achieved by decarbonizing water, including acidification and blowing air in the fluidized bed, in the processed medium injected solid-magnetic granules with a diameter of 4-16 mm and affect it with an alternating electromagnetic field with an induction value of 0.16-0, 2 T. The introduction of magnetically hard granules into the processable medium and the effect on it by an alternating electromagnetic field creates a magnetic fluidized layer in which the complex treatment of water takes place. The translational and rotational movement of particles leads to the turbulence of the treated water: when particles collide with high speeds, high and low pressure zones form in the treated water, which leads to the rupture of interatomic bonds and contributes to the intensification of the decoconization process. Permanent electromagnetic field. created by the magnetically hard granules themselves, also accelerates the destruction of HCO3 ions /, in turn, facilitates the release of carbon dioxide gas and also intensifies the decarbonization process. In addition, due to the reorientation of the external induction vector to the reverse alternating electromagnetic field, it is easier to break bonds in the HCOJ ions, and also eliminates the coalescence of air-bubble bubbles, maintaining the structure of the fluidized bed homogeneous. The induction value of 0.16-0.2 T is optimal for the decarbonization process. When the value and duction is below 0.16 T, the intensity of the movement of the magnetically hard granules is not sufficient for complete decarbonization, increasing the induction above 0.2 T increases the power consumption without increasing the mixing intensity of the magnetically hard granules, which, in turn, does not intensifies the decarbonization process. The use of magnetically hard granules with a diameter of less than 4 mm does not create mixing of the required intensity. The use of magnetically solid granules with a diameter greater than 16 mm is impractical due to the fact that a further increase in size leads to a decrease in the intensity of particle motion at the indicated parameters of the magnetic field induction. Example. Water is decarbonated with a HCO3 content of 1500 mg / l. The decarbonization of natural waters is carried out at a plant with a capacity of 400 l / h. Acidification of water is carried out with cation exchanger. Then magnetically hard granules with a diameter of 2 are alternately loaded into the water; four; eight; 12; sixteen; 18 and 20 mm made of barium hexaferrite and coated with a polymer material to avoid water contamination due to collision and abrasion of particles. In this case, the ratio of the volumes of magnetically solid particles to the cation resin is 5: 1. Then the solution is affected by an alternating electromagnetic field with an induction value of (B) 0, lj 0.16f 0.2 and 0.25 T. The effect on decarbonization of the granule size and processing time at 1T is given in Table 1. The effect on decarbonization of granule size and processing time at B 0, 16, T is given in Table 2. The effect on decarbonization of granule size and processing time at B 0.2 T is given in Table 3. The effect on decarbonization of granule size and processing time at B 0.25 T is given in Table 4. The effect on decarbonization of the induction value is given in Table 5. From Tables 1-4, it can be seen that when water is decarbonized, the best results are obtained when using magnetically hard granules with a diameter of 4-16 mm when the solution is exposed to an alternating electromagnetic field with an induction value of 0.16-0 / 2 T. As can be seen from in Table 5, the time of complete decarbonization of the solution by a known method is 20 minutes, and according to the proposed 5 minutes. The technical and economic efficiency of the proposed method lies in the fact that its use allows several times to reduce the equipment for water decarbonization. Table 1

810

750

1180 1010

980 650 380 235 67 14 O 850 520 370 210 140 50 20

832

512

365

208

sixteen

895

397 237 69.5 14.8 O

635

18

885

675 435

957

582

1020

732

975

210 120

50

18.5 O

185 97

210 138

53

930 550 320 211 153 87 35 О 580 211 87 35 1.2 О 120 50 310 135. 65 21 0.8 О 335 157 78 22.5 1.8 О 575 275 178 73 22.5 11.2 785 335. 257 108 65 28

82

9.8 1.7

3.5 0.8

7.2 1.8

50

80

Table 2 20 About

That 6 persons 3

4428 2.8 O

0.8.0 About About

1.2

0.2O

12.28.5 5.6 O

2418 7.9 0.2 0.8 O 13 1.8 O

83

102

262

9.7 1.5 0.6

168 53

3.2 0.76 O

32

118

4.8 1.1 O

121 36

12

5.1 1.2 O

40

124

sixteen

48

297 93

18

132 78

435

20

Table 4

41

27

2.3

18 12.1 7.8 4.8

38 22.8 17.8 7.6 0.18 O

Table 5

Claims (1)

Claim The method of decarbonization of natural and river waters, including their acidification and air purging in a fluidized bed, characterized in that in order to increase the degree. decarbonization and reducing the duration of the process, magnetically hard granules with a diameter of 4-16 mm are introduced into the water and exposed to an alternating electromagnetic field with an induction value of 0.16-0.2 T.