SU1261706A1

SU1261706A1 - Method of regeneration of stationary layer of ion exchanger in plants of continuous action consisting of a group of filters connected in series

Info

Publication number: SU1261706A1
Application number: SU843744702A
Authority: SU
Inventors: Иоган Арестагесович Гейвандов; Александр Ильич Воронин; Николай Иванович Стоянов; Виктор Иванович Кошкош
Original assignee: Ставропольский политехнический институт
Priority date: 1984-03-29
Filing date: 1984-03-29
Publication date: 1986-10-07

Abstract

Изобретение относитс к способам ионообменного фильтровани воды и позвол ет снизить расход реагентов при восстановлении ионообменной способности фильтров с неподвижным сло:ем ионита в установках непрерывного дейс;тви , состо щих из группы последовательно соединенных фильтров. Отличие способа заключаетс в том, что подачу исходного регенерационного раствора в.первый по ходу регенерации фильтр осуществл ют непрерывно и с посто нной скоростью в течение всего процесса регенерации, затем частично отработанный регенерационный раствор отвод т в последующие фильтры, сбрасывают отработанный а S6 раствор из последнего по ходу ре (Л генерации фильтра и вытесн ют отмывочной водой регенерационный раствор из первого фильтра в последующие. 1 ил.The invention relates to methods of ion-exchange filtration of water and reduces the consumption of reagents while restoring the ion-exchange capacity of fixed-bed filters: ion-exchange in continuous operation plants, twi consisting of a group of series-connected filters. The difference lies in the fact that the feed of the initial regeneration solution into the first filter during the regeneration is carried out continuously and at a constant speed during the whole regeneration process, then the partially spent regeneration solution is withdrawn into the subsequent filters, the waste solution is discharged during the course of re (L generation of the filter and the regeneration solution is forced out of the first filter into the subsequent ones with washing water. 1 Il.

Description

Изобретение относится к ионитной обработке воды в фильтрах непрерывного действия с неподвижным слоем ионита и может быть использовано в технологических циклах водоподготовки в теплоэнергетической, химической и нефтехимической отраслях промышленности.The invention relates to ion-exchange water treatment in continuous filters with a fixed layer of ion exchanger and can be used in technological cycles of water treatment in the heat-power, chemical and petrochemical industries.

Цель изобретения - снижение расхода реагентов при сохранении качества регенерации.The purpose of the invention is to reduce the consumption of reagents while maintaining the quality of regeneration.

На чертеже представлена схема установки для осуществления предлагаемого способа.The drawing shows a diagram of an installation for implementing the proposed method.

Установка содержит группу фильтров 1 -'4, соединенных последовательно трубопроводами 5, трубопровод 6 с вентилем 7 служит для подачи исходного регенерационного раствора, трубопровод 8 с вентилем 9 служит для слива отработанного раствора. По трубопроводу 10 с вентилем 11 осуществляют подачу воды на отмывку фильтра 2, I регенерационный раствор фильтры 3 и 4 подают по трубопроводам 5 при открытых соответственно вентилях 12 и 13 и отводят по трубопроводу 14 с вентилем 15.The installation contains a group of filters 1 -'4 connected in series by pipelines 5, pipeline 6 with valve 7 serves to supply the initial regeneration solution, pipe 8 with valve 9 serves to discharge the spent solution. Through a pipeline 10 with valve 11, water is supplied for washing the filter 2, I regeneration solution, filters 3 and 4 are fed through pipelines 5 with valves 12 and 13 open respectively, and diverted through pipeline 14 with valve 15.

Пример. Фильтр 1 работает на очистку воды. В этом случае первым по ходу регенерации является фильтр 2, в который непрерывно вводят исходный регенерационный раствор (6-8%-ный раствор поваренной соли).Example. Filter 1 works to purify water. In this case, the first in the course of regeneration is filter 2, into which the initial regeneration solution (6-8% sodium chloride solution) is continuously introduced.

Объем пропускаемого исходного регенерационного раствора определяют из расчета 2,0 мг-экв/мг-экв. Скорость ввода регенерационного раствора определяют по величине требуемого объема регенерационного раствора и времени, отводимому на проведение процесса регенерации.The volume of skipped stock regeneration solution is determined from the calculation of 2.0 mEq / mEq. The input rate of the regeneration solution is determined by the value of the required volume of the regeneration solution and the time allocated to the regeneration process.

Частично отработанный регенерационный раствор пропускают из первого по ходу регенерации фильтра через последующий, т.е. фильтры 3 и 4. Из последнего по ходу регенерации фильтра отработанный регенерационный рйствор сбрасывают в дренаж.A partially spent regeneration solution is passed from the first filter during the regeneration through the subsequent one, i.e. filters 3 and 4. From the last filter regeneration, the spent regeneration solution is discharged into the drainage.

В конце процесса регенерации в первый по ходу регенерации фильтр вводят отмывочную воду, вытесняя ею регенерационный раствор на последующие фильтры.At the end of the regeneration process, washing water is introduced into the first filter during the regeneration, displacing the regeneration solution with it into subsequent filters.

Объем и скорость ввода отмывочной воды, пропускаемой через фильтр, устанавливают по нормативам, приведенным в справочной литературе.The volume and speed of entering the washing water passed through the filter is set according to the standards given in the reference literature.

Удельный расход реагента составляет 1,15 кг NaCl на 1 т обработанной пресной воды с исходной жесткостью до 10 мг-зкв/л, что позволяет обеспечить требуемую глубину умягчения питательной воды парогенераторов (10-20 мкг-экв/л).The specific consumption of the reagent is 1.15 kg of NaCl per 1 ton of treated fresh water with an initial hardness of up to 10 mg-zq / l, which allows us to provide the required depth of softening of the feed water of the steam generators (10-20 μg-eq / l).

Расход реагентов сокращается на 10-15% по сравнению с известным и, соответственно, уменьшается количество вредных стоков.The consumption of reagents is reduced by 10-15% compared with the known and, accordingly, the amount of harmful effluents is reduced.

Предлагаемый способ можно использовать также при Н-катионировании, ОН-анионировании и других ионитных методах обработки воды.The proposed method can also be used for H-cation, OH-anionization and other ionite methods of water treatment.

Claims

The invention relates to ion-exchange treatment of water in fixed action filters with a fixed bed of ion exchanger and can be used in the process cycles of water treatment in the heat and power, chemical and petrochemical industries. The purpose of the invention is to reduce the consumption of reagents while maintaining the quality of regeneration. The drawing shows an installation diagram for carrying out the proposed method. The installation contains a group of filters 1 4 connected in series with pipelines 5, pipeline 6 with valve 7 serves to supply the initial regeneration solution, pipeline 8 with valve 9 serves to drain the spent solution. Pipeline 10 with valve 11 is used to supply water to the filter; regeneration solution filters 3 and 4 are fed through pipelines 5 with valves 12 and 13 open respectively and discharged through pipe 14 with valve 15. Perm. Filter 1 works on water purification. In this case, the first in the course of regeneration is the filter 2, into which the initial regeneration solution is continuously introduced (6-8% solution of common salt). The volume of the passed initial regeneration solution is determined from the calculation of 2.0 mEq / mEq. The rate of input of the regeneration solution is determined by the magnitude of the required volume of the regeneration solution and the time allotted for the regeneration process. The partially spent regeneration solution is passed from the first filter during the regeneration through n to the next, i.e. filters 3 and 4. From the latter, in the course of regeneration of the filter, the spent regeneration p & valve is discharged into the drainage. At the end of the regeneration process, wash water is injected into the first filter during the regeneration process, displacing the regeneration solution onto subsequent filters. The volume and rate of entry of wash water flowing through the filter, set according to the standards given in the literature. The specific consumption of the reagent is 1.15 kg of NaCl per 1 ton of treated fresh water with an initial hardness of up to 10 mEq / l, which allows for the required depth of softening of the feed water of steam generators (10-20 µg-qsq / l). The consumption of reagents is reduced by 10-15% compared to the known and, accordingly, the amount of hazardous effluent is reduced. The proposed method can also be used for H-cationization, OH-anioning and other ion-exchange water treatment methods. Claims of Invention A method of regenerating a fixed bed of ion exchangers in continuous installations consisting of a group of series-connected filters, including feeding the initial regeneration flow to the first filter during regeneration, withdrawing the partially spent regeneration solution from the first filter to the next, discharging the spent solution from the last to during the filter regeneration and the replacement of the regeneration solution from the first filter with the washing water in the subsequent ones, characterized in that voltage flow of reactants while maintaining the quality of the regeneration, the regenerant supply source to the first filter during the regeneration is carried out continuously and at a constant rate during the entire regeneration process.