Method and device for producing a pure liquid from a crude liquid
View Patent ↗When fresh water is produced from salt water or similar by evaporation of untreated or crude liquid in an evaporation device under partial vacuum and by vapor condensation in a condensation device connected with the vapor outlet of the evaporation device a high degree of evaporation and cost effectiveness can be obtained in that the evaporation device and the condensation device in a disconnected condition, are filled with crude or clean liquid, respectively, and are subsequently exposed to a partial vacuum created by volume enlargement under hermetically sealed conditions and that the evaporation device and the condensation device are not flow-connected with each other until they are under partial vacuum.
1. A process for producing a clean liquid from a crude liquid by means of an evaporation device and a condensation device connectable with the vapor outlet of the evaporation device, comprising the steps of:
filling the evaporation device with crude liquid and the condensation device with a clean liquid, when they are disconnected;
exposing the crude liquid and the clean liquid in each device to a partial vacuum created by volume enlargement under hermetically sealed conditions; and
subsequently flow connecting the evaporation device and the condensation device.
2. The process according to claim 1 , further comprising the step of:
heating the crude liquid in a heater; and
separating the vapor in a separator associated with the heater.
3. The process according to claim 1 , further comprising the step of:
cooling the condensation device during condensation.
4. The process according to claim 1 , further comprising the step of:
injecting a vapor into the condensation device using clean liquid from the condensation device.
5. The process according to claim 1 , further comprising the step of:
stimulating the condensation device to perform vibrating movements.
6. The process according to claim 1 , further comprising the step of:
filling the evaporation device from a raw water tank located at a higher level and refilled as and when required.
7. The process according to claim 1 , further comprising the step of:
filling the condensation device from a higher-level clean water tank into which the condensed water is urged due to volume reduction.
8. The process according to claim 1 , wherein: the crude liquid is salt water and the clean liquid is fresh water.