SU712011A3 - Unit for water purification - Google Patents

Description

The invention relates to devices with ion-exchange mixed loading and can be used for desalting liquids.

A known installation for water treatment, including a vessel divided by a partition into two chambers, each of which contains a drainage system for draining clean liquid. The chambers are connected by means of a set of vertical pipes. For removal of ion-exchange resins of different specific gravities, separate branch pipes are provided, which are connected to separate columns for the regeneration of ion-exchange resins.

A disadvantage of the known installation is the low degree of purification of the liquid, due to the location of the branch pipes at the outlet of clean water.

The closest in technical essence and the achieved result is the installation, including a working column filled with a mixed load, an ejector, a separation column with drain pipes buried in the layer of ion exchanger, and a regeneration column. thirty

The disadvantage of the installation is the poor quality of water treatment.

The aim of the invention is to improve the quality of water treatment.

This is achieved by the fact that the installation is equipped with a measured column located between the ejector and the separation column.

It is advisable to arrange the lower edges of the outlet pipes of the separation column from each other at a distance determined by the equation _ 0.004 (GSG _K G, 5Q _a \

P \ NVK _K. ΝΝΚ _Λ / where AL is the distance between the lower edges of the branch pipes;

d ^ is the diameter of the separation column;

1> £ - device performance;

η is the clock number;

GSG _K - content of cations of raw water, g · equiv · m ^e ;

- the content of raw water anions, g-eq / m;

- working 'exchange capacity of the anion exchanger, g-eq / L _A ;

NVK _K is the working exchange capacity of the cation exchanger, g / eq / b * ..

The installation for a general view is depicted; in FIG. 2 anion differences Since the weight difference between the cations and anions is small, due to the intermediate inclusion of the `` safety zone ¹ '' and the resulting distance between the inlet of the outlet pipes, there is a guarantee that there is only one type of ion-exchange mass in the inlet region of the outlet pipes, and namely cation exchange resin or anion exchange resin.

In Fig. Water purification, installation, when cation - and selective exchangers, have a new frequency of resin grains, the overall appearance.

The water treatment plant consists of a working column 1 filled with a mixed load 2, with a supply pipe 3 having a valve 4. A pipe 5 with a valve 6 is provided for the removal of pure water. For carrying out the hydraulic transport of the load 2, a pipeline is provided in the measuring column 7 8, attached to the bottom of the working column, and having; taps 9, 10. Between the working column 1 and the measuring column Ί an ejector 11 is placed, by means of which water is supplied to flush the measuring column and water 12 enters the ejector with a tap 13.

Above the measuring column, a separation column is connected to the measuring column by means of a pipe'15 with a tap 16. In the separation column 14, outlet pipes 17, 18, immersed in the load at various depths, are used to discharge ion-exchange resins of different specific gravities. The pipe 17, the inlet end of which is located above, serves to drain the anion exchange resin, and the pipe 18 - to drain the cation exchange resin. Pressure water is introduced into the separation column 14 with the valve 20.

the separation line 21, and the pipe 22 of the column 22 is selected so that it contains five charges of ion exchange resins, the charge of cation exchanger being in the region of the inlet end of the outlet pipe 18, and the anion exchanger is in the region of the inlet end of the outlet pipe 17. Discharged from the separation column 14, the ion-exchange resin then flows separately into the generation and washing columns, namely, cation exchange resin — into the U-shaped column 23, and anion exchange resin — into the bosom 24 with the drain pipes of the washed resins 25 and 26, respectively.

After separate washing and regeneration of the cation exchanger and anion exchanger in columns 23 and 24, they are sent to a common pipeline 27 and then to a mixing chamber 28 located above the work

Vopo pipe

14, connected to pipeline 19 Cation exchanger is discharged from the column through trianionite - through, a separator of 60 'όδ whose chamber into which freshly regenerated resin is displaced through shutoff valves 29. Conditioning columns 30 and 31 with pipelines 32 and 33 are provided for the regeneration of cation exchangers.

Installation works as follows.

The source water through pipeline 3 enters the working column 1 from the bottom up and clean water is discharged through pipeline 5 with the valve 6 open. If mixed loading is contaminated, it is transported to the metering column 7 and then to the separation column 14, in which the lighter anion exchange charge rises , and a heavier cation exchange resin is deposited down.

Between both downloads, depending on the resin rock, its granularity, loading state and service life, a pronounced "safety zone" ^{1 is formed} . Along with the separation of the resins by specific gravities in the separation column 14, their preliminary washing is also carried out. The final washing and regeneration of cation exchange resin and anion exchange resin is carried out in conditioning columns 30 and 31 using an aqueous solution of caustic soda and hydrochloric acid 30, respectively. Finally, the adjusted charge through pipelines 32 and 33 enters the mixing chamber 28, and from there again into the working column 1, and the water treatment process is repeated.

Thus, by washing the ion exchangers and regenerating them in separate conditioning columns, a selective exchange of heavy metals contained in wastewater is achieved, moreover, during washing, the heavy metals perceived by it are removed from the resin, all positively charged complexes are removed by cation-selective exchange, for example , copper tetramine complex with hydrochloric acid, and in the case of amino-selective exchange all negatively charged complexes, for example, heavy metal cation exchange complexes with -stand sodium hydroxide solution. This improves the quality of water purification.

Claims (2)

The invention relates to devices with ion exchange mixed loading and can be used in the desalting of liquids. A water purification plant is known, comprising a vessel divided by a partition into two chambers, each of which contains a drainage system for draining a clear liquid. Cameras. By means of a set of vertical pipes are interconnected. For removal of ion-exchange resins of different specific weight, separate branch pipes are provided, which are connected to independent columns of ion-exchange resin regeneration. A disadvantage of the known installation is the low degree of purification of the liquid, due to the location of the inlet pipes at the outlet of clean water. The closest in technical essence and the achieved result is the installation, which includes a working column filled with a mixed load, an ejector, a separation column with drain pipes buried in an ion exchanger layer, and a regeneration column. The disadvantage of the installation is the viscous quality of water purification. The aim of the invention is to improve the quality of water purification. This is achieved by the fact that it is installed with a dimensional column spreaded between the ejector and the partition column. It is advisable that the lower edges of the individual pipes of the separation column be spaced apart from each other and determined by the equation O, oo4 Lp / GSG j-iff 1 V M (V AND VNVK e are the distance between the lower edges of the branch pipes; dn is the diameter of the separation column ; device performance; clock rate; p the content of cations of raw SG water, g equivalent, the content of raw water anions, g-eq / m; the working exchange capacity of the NVKA; anion-exchanger, gekv / L; the working exchange capacity of the NVK., cation exchanger, g / sqv / bd. Since the difference in weight between cations and anions is small, due to the intermediate inclusion of the safety zone and the distance between the inlets of the outflow pipes caused by this, a guarantee is created that there is only one type of ion exchange mass, namely cationite or anionite, in the area of the outlet of the outlet pipes. general view; in Fig. 2, an installation when cationic and anion-selective exchangers have a different frequency of resin grains, a general view. An installation for water purification consists of a working cylinder 1 filled with an offset load 2, with an inlet pipe 3 having valve 4. To divert chaff water, a pipeline 5 with a valve 6 is installed. To carry out hydrotransport of load 2, into a dimensional, column 7, a pipeline 8 is provided, connected to the lower part of the working column, and having taps 9, 10. Between the working column 1 and the measuring column 7 is placed an ejector 11, by means of which water is supplied to the washing of the measuring column. Water enters the ejector through conduit 12 with valve 13. A separating column 14 is placed at the measuring column, connected to the measuring column by means of pipeline 15 with a crane 16. Discharge column 14 for discharge of ion exchange resins of different specific weights serves as discharge pipes 17, 18, immersed in loading at different depths. The pipe 17, the input end of which is located above, serves to drain the anion exchanger, and the pipe 18 to discharge the cation exchanger. Pressurized water is introduced into the separation column 14 through conduit 19 with valve 20. The cation exchanger is discharged into the separation column through conduit 21, and the anion exchanger is withdrawn through conduit 22. The separator column is chosen so that it contains a load of ion exchange resins, and loading the cation exchanger is located in the region at the end of the discharge pipe 18, and the anion exchanger is located in the entrance end region of the exhaust pipe 17. The ion exchange resin removed from the separation column 14 is fed further into the regeneration and washing columns separately, namely Ationite - in the column 23 is i-shaped, and anion exchanger - in the column 24 with drain pipes of the washed resins 25 and 26, respectively. After separate washing and regeneration of the cation exchanger and anion exchanger in columns 23 and 24, they are directed to the common pipeline 27 and further to the mixing chambers 28, located above the working chamber, into which the freshly regenerated resin is forced out through the stop valves 29. For the regeneration of the cation exchangers are provided air conditioning columns 30 and 31 with pipelines 32 and 33. The installation works in the following way. The source water through conduit 3 enters working column 1 from bottom to top and is discharged clean through conduit 5 when valve 6 is open. In the case of a mixed load contamination, it is transported to measuring column 7 and further to separation column 14, in which the lighter anion exchange load rises up and more cationite cation precipitates down. Between both loads, depending on the resin of the resin, its grit, loading condition and the life of the product, a strong safety zone is formed. Along with the separation of the resins according to the specific gravities in the / separation column 14, they are also prewashed. Final washing and regeneration of the cation exchanger and anion exchanger is carried out in conditioning columns 30 and 31 using an aqueous solution of caustic soda and hydrochloric acid, respectively. The final regenerated load through pipelines 32 and 33 enters the mixing chamber 28, and from there again into the working column 1, and the process of water purification is repeated. Thus, due to the implementation of the washing of ionites and their regeneration in separate ELC conditioning columns, selective exchange of heavy metals contained in the wastewater is achieved, and the washed heavy metals are removed from the resin during washing, all positively removed from cation-selective exchange. charged complexes, for example, a copper tetrs1min complex with hydrochloric acid, and upon amino-selective exchange, all negatively charged complexes, for example heavy metal cation exchangers with psm An aqueous solution of caustic soda. This makes it possible to improve the quality of water purification. Claim 1. A water purification plant comprising a working column filled with a mixed load, an ejector, a separation column with drain pipes buried in an ion exchanger layer, and a regeneration column, characterized in that / a dimensional column. placed between the ejector and the separation column. 2. Installation according to claim 1, characterized in that the lower edges of the branch pipes of the separation column are spaced from each other at a distance determined by the equation 0, OO4 .Ji (. GSQ, GSQj -) HVK And h NVK. TO L is the distance between the lower edges of the branch pipes; dn is the diameter of the separation column; Ug - device performance; n is the clock number; 5 GSG, - the content of raw cations water, g.eqv / m5. SzSd - the content of raw anions water, g-EQ / m. NVK - working exchange capacity Q anion exchanger, g EQ / NVK - working exchange capacity Kation exchanger, g equdd. u, -j / j. -I-and-I, T 11 I I III and I j H ik.HP. , d (N V t /; 1 M DG (.;  -Jw / 1 yv / Qi / y