Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering

Nanjing University

Nanjing Normal University

Nanjing University Yancheng Environmental Protection Technology and Engineering Research Institute

Xinchun Ding

Aimin Li

Chendong Shuang

Qing Zhou

Mengqiao Wang

Yeli Jiang

Bicun Jiang

Wentao Li

Zixiao Xu

Weiwei Zhou

Jianjun Dai

Peng Shi

Ke Shen

Dongmei Li

Xun Cao

Yinsen Li

Jiali Tang

Xiao Zhang

Xiang Peng

The invention discloses a fixed bed counter-current regeneration device for ion exchange resin and the method of use, relates to the field of ion exchange resin regeneration. The device comprises a cyclone separator, a regeneration reactor, a fully mixed resin reactor, a desorption solution storage tank, and a regenerant storage tank, wherein the cyclone separator is placed on top of the regeneration reactor, the upper part of the cyclone separator is connected to the fully mixed resin reactor. A resin inlet is provided at the bottom of the cyclone separator, a resin bed and a resin filter are arranged inside the regeneration reactor, a resin outlet and a regenerant inlet are arranged at the bottom of the regeneration reactor, the resin outlet is connected to the fully mixed resin reactor, the regenerant inlet is connected to the desorption solution storage tank and the regenerant storage tank, respectively, one side of the regeneration reactor is further provided with a regenerant outlet, and the regenerant outlet is connected to the desorption solution storage tank. The invention effectively improves resin regeneration efficiency via separator and counter-current, reduces the desorption solution yield, prevents mechanical wear and tear of the resin, and can be used as part of large-scale ion exchange resin applications.

Fixed bed counter-current regeneration device of ion exchange resin and application method of fixed bed counter-current regeneration device

Implementations herein relate to methods for reducing a desorption solution for regeneration of ion exchange resins in the field of regeneration of resins. The implementations solve problems related to low utilization rates of regeneration agents and high volumes of desorption solutions during the desorption process. The implementations include regenerating the ion exchange resins, and the regeneration solution becomes the desorption solution. After coagulating sedimentation of the desorption solution and slurry separation, a large amount of organic contents are removed from coagulation serum and a large amount of regenerate agents are left. The implementations further include adding the regeneration agent to the coagulation serum to form new or refreshed regeneration solution to regenerate the ion exchange resins. Accordingly, the coagulation serum may be generated from the desorption solution. These operations may be repeated multiple batches for resin regeneration.

Method for regeneration of ion exchange resin causing reduction of desorption solution

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Yancheng, China

Xinchun Ding