A preparing method of a urea solution used for vehicles
A technology of urea for vehicles and a production method, which is applied to the preparation of organic compounds, preparation of urea derivatives, chemical instruments and methods, etc., can solve the problems of non-concentrated pollution, small scale, and difficulty in recycling waste liquid, and achieve a solution problems, save water resources, and reduce environmental pollution
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[0016] A preparation method for vehicle urea solution, comprising the following steps:
[0017] (1), the preparation of urea: take the urea synthesis reaction solution from the synthesis stage of the urea production plant and send it into the urine tank to obtain the initial urea solution;
[0018] (2), the initial urea solution is passed through a flash method to remove excess ammonium and carbon dioxide;
[0019] (3), the urea synthesis reaction liquid is sent into the vacuum flash crystallization kettle, and vacuum flash crystallization is carried out;
[0020] (4) Production of high-purity water: desalinate industrial water, filter it with activated carbon, remove macromolecules through reverse osmosis membrane device, remove TOC, deoxidize, disinfect and sterilize, and filter.
[0021] (5) Mix crystalline urea with high-purity water and stir evenly to obtain a urea solution for vehicles.
[0022] Further, in the preparation method of the above-mentioned urea solution fo...
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