SU1577803A1 - Ionite filter - Google Patents

Abstract

This invention relates to countercurrent ion exchange filters for water softening and desalting in water treatment plants. The invention makes it possible to reduce ionite losses due to grinding and to reduce the consumption of the reagent solution. The ionic filter comprises a housing 1 with an ion exchanger 2, a lower 3, an upper 4 and an average 5 drainage-distribution means (PC), the last of which is made in the form of horizontal partitions 6, 7, 8 with openings to form an isolated chamber 9 between partitions 7 and 8, drainage caps 10 on the part of the openings of the partition 8, tubes 17, connecting openings of the partition 7 of the medium PC 5 with the remaining openings of the partition 8, branch pipe 18 for supplying the loosening water to the chamber 9 between the middle and lower horizontal partitions 6 and 7. Ion-ion filter include 11-16 is also pipes for supplying (discharge) technology environments. The backwash washing before regeneration is carried out with water through nozzles 14 and 12, while the fluidized filtration load through the tubes 17 expands throughout the entire volume of the housing and through the upper PC 4 and the nozzle 12 is removed into the soil drainage. The regeneration of the lower layer of the ion exchanger is carried out countercurrently (from the bottom up) by feeding the reagent solution through the pipes 14 and 16. 1 sludge.

Description

The invention relates to water treatment and is intended for use in the water treatment equipment of thermal power plants, namely in countercurrent ion-exchange filters for softening and desalting water.

The purpose of the invention is to reduce the loss of ion exchanger due to grinding and reducing the consumption of the reagent solution.

The drawing shows a filter, General view.

The filter contains a housing 1 with an ion charge 2, lower 3, upper 4 and middle drainage distribution device 5, made in the form of horizontal partitions 6-8 with holes forming a chamber 9 between partitions 7 and 8, drainage caps 10 on the part of the holes of the partition 8, I-16 pipes supplying purified water, discharging loosening water, draining purified water, supplying a reagent solution and loosening water, supplying washing water, draining a reagent solution and washing water. The filter contains tubes 17 connecting the openings of the partition 7 of the middle distribution means with the remaining openings of the partition 8. A pipe 18 for supplying loosening water into the chamber between the middle and lower transverse partitions 7 and 8 is installed on the housing. A pipe 20 is provided for regeneration and washing of the upper layer 19. The lower ion exchanger layer - 21.

Ionite filter works as follows.

The purified water from top to bottom through the pipe 11 enters the upper distribution means 4 of the housing 1, passes the upper layer 19 of the ionic charge 2, where it partially softens and is simultaneously delayed by 80-90% of mechanical impurities, purified water through the holes of the upper horizontal partition 6 and tube 17 enters the lower layer of ion exchanger 21, where the final process of ion exchange occurs. Through the lower distribution means 3 and the nozzle 13, the purified water is discharged to the consumer.

Before regeneration by the supply of loosening water through the pipe 18 and the drain, through the pipe 12 is made loosening the washing of the upper layer 19, where the bulk of the mechanical impurities is retained.

The installation of loosening water in the chamber 9 between the lower and middle partitions of the middle distribution means allows a small amount of loosening water to flush the upper layer 19 using caps 10. Loosening water, changing its direction, captures part of the ionic charge of the lower layer and enters through the tubes 17 into the upper layer, loosens it, washing away from impurities. This technique makes it easier to carry out loosening washing of the entire layer.

As the layer becomes contaminated (approximately after 8-10 regenerations), the entire ionite layer is loosened by loosening the water upward through the nozzle 14 and discharging it through the nozzle 12. In this case, due to the supply of the filter with tubes 17 connecting the holes of the middle horizontal partition with part of the holes of the lower partitions, fluidized by loosening water ion-exchange filter load expands freely and evenly throughout the entire volume of the housing, reaching the upper distribution means 4. In the process of yayuschey washing through the upper distributor means 4 and the pipe 12 are removed contamination in drainage and fines exchanger. After loosening the washing through the same tubes 17, the reverse flow of the ion exchanger is carried out, completely filling the space between the middle and lower distribution devices.

Regeneration of the lower layer of ion exchanger 21 is carried out countercurrently (from the bottom up) by feeding the reagent solution through the pipe 14 and by draining the spent regeneration solution through the pipe 16'-. At the same time, a reagent solution for regeneration of the upper layer 19 is supplied through the nozzle 20 at a slower speed, while preventing * - expansion of the load of the regeneration volume of the ion exchanger.

Washing of the ion exchanger of the lower layer 21 after regeneration is carried out by supplying washing water upward through the pipe 15 and draining it through the pipe 16. At the same time, washing the top layer of the ion exchanger by feeding the washing water through the pipe 20 and draining it through the pipe 16.

Claims (1)

Claim An ion filter containing a vertical cylindrical body with a lid and a bottom, upper and lower drainage distribution means, a middle drainage distribution device in the form of three horizontal partitions with holes, the lower of which is equipped with drainage caps immersed in the ionite, the upper and lower layers of the ion exchanger, located respectively between upper and middle, middle and lower drainage-distributing means, pipe for supplying purified water and withdrawing loosening water, connected to the cover, pipe ki for supplying a reagent solution, washing water and drainage of purified water, connected to the bottom, nozzles for withdrawing a reagent solution and supplying loosening water and a hydraulic means for hydrotransfer of ion exchanger, characterized in that, in order to reduce the loss of ion exchanger due to reduction and reduction of solution consumption reagent, a branch pipe for supplying loosening water is connected to the housing between the middle and lower horizontal partitions, and the means for hydrotransfer of ion exchanger is made in the form of tubes connecting the middle and lower horizontal partitions birthmarks.