Overview

Principal Applications

  • 蒸気発生器のブローダウン精製
  • 一次系におけるCVCS ホウ酸除去
  • 放射性廃棄物の除染
  • 混床樹脂アニオン交換樹脂成分
  • アニオン交換樹脂アンダーレイ

Advantages

  • 高交換容量
  • 最小の残留塩化物と硫化塩
  • 最小の残留金属
  • 低い有機物の抽出物と溶出物
  • 高いOH形への変換率

Systems

  • メークアップ純粋装置
  • 一次系冷却材
  • 放射性廃棄物

Typical Packaging

  • 1 CF Box
  • 5 ft³ Drum (Fiber)

Typical Physical & Chemical Characteristics:

Polymer Structure ジビニルベンゼンにより架橋されたポリスチレンゲル
Appearance 球形ビード
Functional Group Ⅰ型4級アンモニウム
Ionic Form OH-
総交換容量(最小) 1.15 eq/l (25.1 Kgr/ft³) (OH- 形)
水分含有率 42 - 47 % (Cl-)
平均径 625 ± 75 µm
均一係数 (最大) 1.2
変換率 (最小) 95 % (OH- 形)
不純物 鉄 (最大) 20 ppm
不純物 ナトリウム (最大) 20 ppm
不純物重金属 (最大) 30 ppm
CO32- 形 (最大) 5 %
SO42- 形 (最大) 0.1 %
Cl-形 (最大) 0.1 %
比重 1.08
見かけ密度 (概算) 660 - 700 g/L (41.2 - 43.8 lb/ft³)
温度制限, 非再生樹脂塔 100 °C (212.0 °F) (OH- 形)
温度制限, 再生樹脂塔 60 °C (140.0 °F) (OH- 形)

油圧特性

Pressure Drop

The pressure drop across a bed of ion exchange resin depends on the particle size distribution, bed depth, and voids volume of the exchange material, as well as on the flow rate and viscosity of the influent solution. Factors affecting any of these parameters— such as the presence of particulate matter filtered out by the bed, abnormal compressibility of the resin, or the incomplete classification of the bed—will have an adverse effect, and result in an increased head loss. Depending on the quality of the influent water, the application and the design of the plant, service flow rates may vary from 10 to 40 BV/h.

Pressure Drop Across Resin Bed

Backwash

During up-flow backwash, the resin bed should be expanded in volume between 50 and 70% for at least 10 to 15 minutes. This operation will free particulate matter, clear the bed of bubbles and voids, and reclassify the resin particles ensuring minimum resistance to flow. When first putting into service, approximately 30 minutes of expansion is usually sufficient to properly classify the bed. It is important to note that bed expansion increases with flow rate and decreases with influent fluid temperature. Caution must be taken to avoid loss of resin through the top of the vessel by over expansion of the bed.

Backwash Expansion of Resin Bed