| 摘要 |
<p>Water is hardened by pumping a stream of the water along a pipeline 12, forming a dispersion of carbon dioxide bubbles in the stream by introducing carbon dioxide into the stream through the throat 18 of a venturi 16 in the pipeline 12, and introducing at a controlled rate an aqueous slurry of a hardening agent into the stream via a pipe 28. The hardening agent, typically lime, reacts with the carbon dioxide to form a soluble salt. The stream containing undissolved hardening agent is introduced through nozzle 34 into a body of water held in a vessel 4 so as to facilitate dissolution of the hardening agent. <IMAGE></p> |
