SU829168A1

SU829168A1 - Continuous-sction ion exchange plant

Info

Publication number: SU829168A1
Application number: SU792809450A
Authority: SU
Inventors: Сергей Константинович Дробышевский; Даниил Иванович Николаев; Борис Аронович Глазман; Вячеслав Андреевич Бухтояров
Original assignee: Северо-Кавказский Филиал Всесоюзногонаучно-Исследовательского Институтабиосинтеза Белковых Веществ; Краснодарский Ордена Трудового Kpac-Ного Знамени Химический Комбинат
Priority date: 1979-08-08
Filing date: 1979-08-08
Publication date: 1981-05-15

Description

Изобретение относится к очистке жидкостей ионитами и может быть использовано в производстве кристаллического ксилита. _The invention relates to the purification of liquids by ion exchangers and can be used in the production of crystalline xylitol. _

Известен ионообменный аппарат, ⁵используемый в производстве кристаллического ксилитд,, содержащий корпус а ионообменной загрузкой и дренажные устройства, расположенные в верхней и нижней части корпуса [Ϊ] .Known ion-exchange apparatus, ⁵ used in the production of crystalline xylitide, containing a housing and ion-exchange loading and drainage devices located in the upper and lower parts of the housing [Ϊ].

Недостатками этого аппарата являются периодичность его работы, необходимость применения ручного труда, повышенная металлоемкость, а также значительные расходы реагентов на 15 регенерацию ионитов и потери продукта гидролиза при очистке.The disadvantages of this apparatus are the frequency of its operation, the need for manual labor, increased metal consumption, as well as the significant cost of reagents for 15 regeneration of ion exchangers and loss of hydrolysis product during cleaning.

Известна также ионообменная установка непрерывного действия, содержащая ионообменную и регенерационную 20 колонны, цилиндрическую емкость для промывки ионита и устройство для транспортировки ионита £23 ·Also known is an ion-exchange installation of continuous operation, comprising ion-exchange and regeneration 20 columns, a cylindrical tank for washing the ion exchanger and a device for transporting the ion exchanger £ 23

Недостатками данной установки являются ее низкая производительность, обусловленная потерями продукта при его очистке, а также то, что щели дренажной системы часто забиваются -измельченным ионитом, и для очистки 2 дренажной системы требуется останавливать производство.The disadvantages of this installation are its low productivity due to product losses during its cleaning, as well as the fact that the drainage system slots are often clogged with a -red ion exchanger, and it is necessary to stop production to clean the 2 drainage systems.

Цель изобретения - повышение производительности за счет сокращения потерь очищаемогу продукта и 'повышение надежности устанбвки в эксплуатации.The purpose of the invention is to increase productivity by reducing losses of the product being cleaned and to increase the reliability of installation in operation.

Поставленная цель достигается теМ, что ионообменная колонка и емкость для промывки ионита снабжены соосно установленными над ними цилиндро-коническими отстойными камерами.. Целесообразно ионообменмую установку снабжать цилиндрической емкостью для дополнительной отмывки ионита, установленной в нижней части ионообменной колонны.This goal is achieved by the fact that the ion-exchange column and the ion-exchange washing tank are equipped with cylinder-conical settling chambers coaxially mounted above them. It is advisable to provide the ion-exchange installation with a cylindrical tank for additional washing of the ion-exchange resin installed in the lower part of the ion-exchange column.

. Устройство для транспортировки ионита целесообразно снабжать эжектором.. A device for transporting ion exchanger, it is advisable to provide an ejector.

Регенерационную колонну целесообразно выполнять в виде двух цилиндров с увеличивающимися в направлении снизу вверх диаметрами, соединенных между собой коническим переходом.It is advisable to perform the regeneration column in the form of two cylinders with diameters increasing in the direction from bottom to top, connected by a conical transition.

На чертеже представлена ионообменная установка, общий вид.The drawing shows an ion-exchange installation, General view.

Ионообменная установка состоит из ионообменной колонны 1 с патрубком 2 подвода очищаемого раствора, цилин прической емкости 3 для дополнительной отмывки ионита с патрубком 4 для подачи воды, эжектора 5, заслонки 6, регенерационной колонны 7 переменного сечения, пеноловушки 8,цилиндрической емкости 9 для промывки ионита с патрубком 10 подачи промывной воды. Емкость для промывки ионита внизу имеет конусную часть с клапаном 11 и отстойную камеру 12 большего диаметра 'в верхней части с переливным штуцером 13. Ионообменная колонка 1 в верх ней части снабжена отстойной камерой 14 с переливным штуцером 15. Отстойные камеры 12 и 14 представляют собой пустотелые цилиндры с нижней частью, выполненной в виде обратного усеченного конуса.The ion-exchange installation consists of an ion-exchange column 1 with a nozzle 2 for supplying a solution to be cleaned, a cylinder of a hairdryer 3 for additional washing of an ion exchanger with a nozzle 4 for water supply, an ejector 5, a shutter 6, a regeneration column 7 of variable cross section, a foam trap 8, a cylindrical tank 9 for washing the ion exchanger with a pipe 10 for supplying washing water. The ion exchanger washing tank at the bottom has a conical part with a valve 11 and a settling chamber 12 of a larger diameter 'at the top with an overflow fitting 13. The ion-exchange column 1 in the upper part is equipped with a settling chamber 14 with an overflow fitting 15. The settling chambers 12 and 14 are hollow cylinders with a lower part made in the form of a reverse truncated cone.

Ионообменная установка работает следующим образом.The ion exchange installation operates as follows.

Очищаемый продукт гидролиза поступает в ионообменную колонну 1 через патрубок 2 и движется навстречу ’ нисходящему потоку ионита, при этом происходит очистка продукта. В отстойной камере 14 восходящая скорость потока уменьшается за счет увеличения диаметра камеры 14 по сравнению с ионообменной колонной 1. Очищенный продукт отделятся от ионита и через переливные штуцеры 15 выводится из колонны.Загрязненный ионит поступает в емкость 3 для отмывки его от продуктов гидролиза, в нижнюю часть емкости 3 через патрубок 4 поступает вода, отжимающая очищаемый раствор от ионита. Отработанный ионит потоком регенерационного раствора посредством регулирующего транспортирующего эжектора 5 подается в колонну 7 для регенерации, где в процессе движения вверх ионит регенерируется от сорбированных примесей. Отрегенерированный ионит через пеноловушку 8 поступает в емкость 9 для отмывки ионита от регенерационного .раствора, где обмывается восходящим потоком воды. Вода на отмывку поступает через патрубок 10.The hydrolysis product to be purified enters the ion exchange column 1 through the nozzle 2 and moves towards the downward flow of the ion exchanger, and the product is purified. In the settling chamber 14, the upward flow rate decreases due to an increase in the diameter of the chamber 14 compared to the ion exchange column 1. The purified product is separated from the ion exchanger and is discharged from the column through overflow fittings 15. The contaminated ion exchanger enters the tank 3 to wash it from the hydrolysis products, to the lower part of the tank 3 through the pipe 4 enters water, squeezing the solution to be cleaned of ion exchanger. The spent ion exchanger by the flow of the regeneration solution through the control transporting ejector 5 is fed into the column 7 for regeneration, where in the process of moving up the ion exchanger is regenerated from sorbed impurities. The regenerated ion exchanger through a foam trap 8 enters the tank 9 for washing the ion exchanger from the regeneration solution, where it is washed with an ascending stream of water. Water for washing enters through the pipe 10.

В отстойной камере 12 за счет увеличения диаметра цилиндрической части скорость восходящего потока жидкости уменьшается, отмывочная вода отделяется от ионита и через переливные штуцеры 13 уходит из аппарата. Отмытый ионит из емкости 9 через. штуцер с клапаном 11 непрерывно поступает в ионообменную колонну 1. Клапан 11 и заслонки 6 необходимы для закрытия штуцеров во время остановки процесса. Расход ионита регулируется эжектором 5 и зависит от характеристики эжектора. В процессе работы в аппарате устанавливаются и поддерживаются уровни ионита, величина которых зависит от загруженного в аппарат ионита и поддерживается за счет того, что нижний конус емкости 9 входит в слой ионита и создает гидроэатвор, а также подбором клапана 11 и емкости 9 в.зависимости от производительности по иониту и скорости восходящих потоков жидкости в ионообменной колонне 1 и емкости 9 для промывки ионита.In the settling chamber 12, due to the increase in the diameter of the cylindrical part, the velocity of the upward liquid flow decreases, the wash water is separated from the ion exchanger and leaves the apparatus through overflow fittings 13. The washed ion exchanger from the tank 9 through. the fitting with the valve 11 continuously enters the ion exchange column 1. The valve 11 and the shutters 6 are necessary to close the fittings while the process is stopped. The flow rate of the ion exchanger is regulated by the ejector 5 and depends on the characteristics of the ejector. In the process of operation, the ionite levels are established and maintained in the apparatus, the value of which depends on the ionite loaded into the apparatus and is maintained due to the fact that the lower cone of the vessel 9 enters the ionite layer and creates a hydraulic generator, as well as by the selection of valve 11 and vessel 9, depending on the performance of the ion exchanger and the speed of the ascending fluid flows in the ion exchange column 1 and the tank 9 for washing the ion exchanger.

Смонтированное внизу колонны устройство для транспортировки ионита, включающее эжектор 5, предназначено для дозировки и непрерывной подачи ионита в регенерационную колонну 7. Нижняя цилиндрическая часть регенерационной колонны 7 имеет сечение меньше верхней ее части, вследствие этого скорость восходящего, потока ионита достигается большей, чем скорости осаждения. Ионит находится во взвешенном состоянии и не препятствует поступлению потока суспензии ионита с регенерационным раствором в колонну регенерации 7 и не забивает щели дренажной системы.The ionite transport device mounted at the bottom of the column, including an ejector 5, is designed for dosing and continuously supplying the ion exchanger to the regeneration column 7. The lower cylindrical part of the regeneration column 7 has a cross section smaller than its upper part, as a result of which the velocity of the ascending, ion exchanger flow is greater than the deposition rate . Ionite is in suspension and does not interfere with the flow of the suspension of the ion exchanger with the regeneration solution into the regeneration column 7 and does not clog the slit of the drainage system.

Наличие в установке емкости 3 для дополнительной отмывки ионита и отстойных камер 12 и 14 позволяют максимально сократить потери целевого продукта (сахара) за счет сокращения его потерь при ионообменной очистке.The presence in the installation of the tank 3 for additional washing of the ion exchanger and settling chambers 12 and 14 can minimize the loss of the target product (sugar) by reducing its losses during ion-exchange cleaning.

Использование данного изобретения позволяет снизить себестоимость кристаллического ксилита на 7-10%.The use of this invention allows to reduce the cost of crystalline xylitol by 7-10%.

Claims

This invention relates to the purification of liquids with ion exchangers and can be used in the production of crystalline xylitol. The ion-exchange apparatus used in the manufacture of crystalline xylitol is known, including an ion-exchange charge housing and drainage devices located in the upper and lower parts of the DJ housing. The disadvantages of this apparatus are its frequency of operation, the need for manual labor, increased storage capacity, and significant reagent consumption. on the regeneration of ion exchangers and the loss of the hydrolysis product during purification. Also known is the ion-exchange continuous installation, which contains ion-exchange and regeneration columns, a cylindrical tank for washing the ion exchanger and a device for transporting the ion exchanger G21. The disadvantages of this installation are its low productivity due to the loss of the product during its cleaning, as well as the fact that the drainage system slits are often clogged with crushed ion exchanger, and to clean the drainage system it is necessary to stop production. The purpose of the invention is to increase productivity by reducing losses to the product being cleaned and improving the reliability of the installation. This goal is achieved by the fact that the ion exchange column and the ionite washing tank are equipped with cylindrical-conical settling chambers mounted coaxially above them. It is advisable to supply the ion-exchange unit with a cylindrical tank for additional washing of the ion exchanger installed in the lower part of the ion-exchange column. . A device for transporting ion exchanger is advisable to provide an ejector. It is advisable to perform the regeneration column in the form of two cylinders with diameters increasing in the bottom-up direction, interconnected by a conical junction. The drawing shows the ion-exchange installation, General view. The ion exchange unit consists of an ion exchange column 1 with a nozzle 2 supplying a solution to be purified, a cylindrical tank 3 for additional washing of the ion exchanger with a nozzle 4 for supplying water, an ejector 5, a damper b, a regeneration column 7 of variable cross section, a foam tray 8, a cylindrical tank 9 for washing the ion exchanger the washing water supply nozzle 10 The tank for washing the ion exchanger at the bottom has a conical part with a valve 11 and a settling chamber 12 of a larger diameter In the upper part with an overflow fitting 13. The ion-exchange column 1 is in the back part It is equipped with a settling chamber 14 with an overflow fitting 15. The settling chambers 12 and 14 are hollow cylinders with the lower part, made in the form of a reverse 7septic cone. Ion-exchange installation works as follows. The hydrolysis product to be purified enters the ion exchange column 1 through the nipple 2 and moves towards the downstream ion exchanger, and the product is purified. In the settling chamber 14, the upstream flow rate is reduced by increasing the diameter of the chamber 14 as compared to the ion exchange column 1. The purified product is separated from the ion exchanger and is removed from the column through overflow fittings 15. The contaminated ion exchanger enters the tank 3 to wash it from the hydrolysis products , water enters the bottom of the tank 3 through the nozzle 4, pressing the solution to be cleaned of ion exchanger. Spent ion exchanger with regeneration solution. by means of the regulating transporting ejector 5, it is fed to the column 7 for regeneration, where, in the process of moving upwardly, the ion exchanger is regenerated from sorbed impurities. The regenerated ion exchanger through the foam trap 8 enters the tank 9 for washing the ion exchanger from the regeneration solution, where it is washed with an upward flow of water. Water is supplied to the washing through the nozzle 10. In the settling chamber 12, due to the increase in the diameter of the cylindrical part, the speed of the upward flow of liquid decreases, the washing water is separated from the ion exchanger and through the outlet fittings 13 leaves the apparatus. The washed ion exchanger from the tank 9 through the nozzle with the valve 11 is continuously supplied to the ion exchange column 1. The valve 11 and the valves 6 are necessary to close the nozzles during the process of airing. The flow rate of the ion exchanger is regulated by the ejector 5 and depends on the characteristics of the ejector. In the course of operation, the levels of the ion exchanger are set and maintained in the apparatus, the magnitude of which depends on the load. It is supported by the fact that the lower cone of the container 9 enters the ionite layer and creates the hydraulic unit, as well as by sub-valve 11 and the tank 9 in. depending on the ion output and the speed of the ascending fluid flows in the ion-exchange column 1 and capacity 9 for washing the resin. Mounted at the bottom of the column, a device for transporting an ion exchanger, including an ejector 5, is intended for metering and continuously supplying the ion exchanger to the regeneration column 7. The lower cylindrical part of the regeneration column 7 has a smaller section than the upper part, and therefore the flow rate of the ion exchanger is greater than the velocity precipitation. The ion exchanger is in a suspended state and does not prevent the flow of the ion exchanger suspension with the regeneration solution into the regeneration column 7 and does not block the gaps of the drainage system. The presence in the installation of a tank 3 for additional washing of the ion exchanger and settling chambers 12 and 14 makes it possible to minimize the loss of the target product (sugar) by reducing its losses during ion-exchange cleaning. The use of this invention reduces the cost of crystalline xylitol by 7-10%. Claim 1. An ion exchange continuous installation comprising ion exchange and regeneration columns, a cylindrical ion exchanger washing tank and an ion exchanger transport device characterized in that, in order to increase the plant performance by reducing the loss of the product being cleaned, the ion exchange column and the washing capacitance ion exchangers are equipped with co-axially mounted over them cylindroconic settling chambers. 2. The apparatus according to claim 1, characterized in that it is provided with. The cylinder has a cylinder for additional washing of the ion exchanger installed in the lower part of the ion exchange column. 3. The installation according to claims 1 and 2, from the fact that the device has an ejector for transporting the ion exchanger. 4. Installation according to claims 1 to 3, characterized in that, in order to increase the reliability of the installation in operation, the regeneration column is made in the form of two cylinders with diameters increasing in the bottom-up direction, interconnected by a cosh junction. Sources of information taken into account in the examination 1. Leikin and Sobolev. Xylitol production. M., 1962, p.10.

2. The patent of England No. 1086505, cl. In 1 j, 1967.