Technical terms and definitions of automatic control sodium ion exchanger

This standard applies to sodium ion exchangers with a working pressure not greater than 0.6 MPa and automatic control by multi-way valves. This standard does not apply to fluidized bed and moving bed sodium ion exchangers, nor does it apply to non-automatically controlled sodium ion exchangers.

  • Hardness (English) refers to the total concentration of metal ions that are easy to form precipitates in water, usually expressed as the total concentration of calcium and magnesium ions in the water.
  • softened water The water after removing most or all of the calcium and magnesium ions.
  • Ion exchange resin is a polymer copolymer with active groups made by chemical synthesis, which can exchange with ions of the same electrical property in the solution.
  • Cation exchange resin refers to ion exchange resin with bidirectional cation exchange characteristics. If sodium salt is used for regeneration, it is sodium ion exchange resin.
  • Automatically controlled sodium ion exchanger can automatically start the regeneration process according to certain set conditions, and uses sodium salt as an ion exchanger as a regenerant. This type of exchanger is also called an automatic control water softener.
  • Salt consumption The number of grams of sodium chloride consumed to restore the exchange capacity of 1 mol of sodium ion exchange resin.
  • Regeneration self-consumption rate The volume ratio of the total water consumption in the regeneration process to the volume of the ion exchange resin.
    The total amount of soft water produced during the period from which the 3.8″ cycle water production exchanger is regenerated and the water production starts to fail.
  • Operating cycle The continuous operating time during the period from which the exchanger is regenerated after the exchanger is regenerated under the rated output condition.
  • Working pressure refers to the pressure of the inlet water gauge entering the inlet of the exchanger.
  • Working temperature refers to the temperature of the medium in the normal working process of the exchanger.
  • The process in which water passes through the ion exchange resin layer in the exchanger to remove most or all of the calcium and magnesium ions in the water.
  • Regeneration process The process of restoring the exchange capacity of the failed ion exchange resin, including but not limited to steps such as backwashing, regeneration, replacement, and forward washing.
  • After the backwashing of the ion exchange resin fails, the ion exchange resin layer is washed from bottom to top with water to make it swell and loosen, and at the same time remove the suspended matter on the upper part of the resin layer, broken resin and other impurities.
  • Regeneration A step in which a certain concentration of regenerated liquid flows through the invalid ion exchange resin layer at a certain flow rate to restore the ion exchange resin to its exchange capacity. This step is also called salt absorption.
    During downstream regeneration, the flow direction of the regeneration liquid is the same as the flow direction of water during operation.
    During counter-current regeneration, the flow direction of the regeneration liquid is opposite to the flow direction of water during operation.
  • Replacement Replacement is a continuation step of regeneration. After the exchanger stops absorbing salt, it continues to inject water at the regenerated liquid flow direction and a similar flow rate, so that the regenerated liquid in the exchanger is discharged while further regenerating the resin. This step is also called slow washing.
  • After the positive washing replacement process is over or before the standby exchanger is put into operation, the incoming water washes the ion exchange resin layer according to the flow direction during operation, washes away the regeneration waste liquid and the ions to be removed, until the water is qualified. This step is also called quick wash.
  • Automatically controlled multi-way valve is a device that can be combined to form multiple different fluid channels without channeling, and is automatically controlled by a certain program (controller for short).
  • The exchanger of flow start regeneration adopts the flow controller to control the periodic water production. When the periodic water production reaches the set value, the exchanger that can automatically start the regeneration process (referred to as flow control type).
  • The time-started regeneration exchanger adopts the program to control the time to start the regeneration process. When the time reaches the set value, the exchanger that can automatically start the regeneration process (referred to as time control type).
  • The exchanger that starts regeneration of the outlet water quality detects the hardness of the exchanger’s outlet water through the induction control system. When the outlet water hardness exceeds the set value, the exchanger that can automatically start the regeneration process (referred to as online monitoring type).
  • The inlet water of the primary sodium ion exchange only passes through the sodium ion exchanger once (referred to as primary sodium).
  • Secondary sodium ion exchange inlet water passes through two series-connected sodium ion exchangers for continuous secondary exchange, in which the effluent of the primary sodium is used as the inlet water of the secondary sodium (referred to as the secondary sodium).
  • When running and regenerating the fixed bed with downstream regeneration, the water flow and the regeneration liquid are the exchangers that pass through the ion exchange resin layer from top to bottom. 3.25″ The water flow through the ion exchange resin layer from top to bottom when the countercurrent regeneration fixed bed is running, and the regeneration liquid flows from bottom to top through the exchanger of the ion exchange resin layer during regeneration.
  • When the floating bed is running, the water flows through the ion exchange resin layer from bottom to top. Due to the upward water flow, the resin layer is held in a suspended state on the upper part of the exchanger. During regeneration, the regenerated liquid flows through the ion exchange resin layer from top to bottom. .
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