Device and method for removing silicate from reverse osmosis concentrate by induced crystallization

A device for removing silicate from reverse osmosis concentrate by induced crystallization, comprising:

• an induced crystallization reactor;
• an acid distributor;
• a raw water distributor;
• a first silicate detector;
• a second silicate detector;
• a pH meter;
• a dryer;
• a vibrating screen;
• and
• a first storage tank;
• wherein the induced crystallization reactor has an inner cavity;
• the inner cavity is divided into a crystallization reaction zone and a transition zone from bottom to top along a vertical direction;
• the crystallization reaction zone is filled with silicon dioxide particles having a preset particle size;
• the raw water distributor is provided at a bottom of the crystallization reaction zone;
• the acid distributor is provided within the crystallization reaction zone, and is located above the raw water distributor;
• the raw water distributor and the acid distributor each have a disc-shaped structure;
• the acid distributor is provided with a plurality of first liquid distribution holes, and the raw water distributor is provided with a plurality of second liquid distribution holes;
• and the number of the plurality of first liquid distribution holes is the same as the number of the plurality of second liquid distribution holes;
• the induced crystallization reactor is provided with a liquid inlet pipe and a sludge discharge pipe;
• the liquid inlet pipe and the sludge discharge pipe are each in communication with the inner cavity, and are located at the bottom of the crystallization reaction zone;
• the liquid inlet pipe is in communication with the raw water distributor;
• the first silicate detector and the pH meter are provided on the liquid inlet pipe;
• a top of the induced crystallization reactor is provided with a liquid outlet pipe;
• the second silicate detector is provided on the liquid outlet pipe;
• the sludge discharge pipe is connected to the dryer;
• the dryer is configured to calcine precipitates discharged from the sludge discharge pipe at a preset temperature;
• wherein the preset temperature is greater than or equal to 150° C.;
• the vibrating screen is configured to separate silicon dioxide particles having different particle sizes;
• and
• the first storage tank is configured to store the silicon dioxide particles having the preset particle size.