Water circulation method used in laboratory circulation-water-type water distiller

Abstract

The invention discloses a water circulation method used in a laboratory circulation-water-type water distiller. According to the method, water in a condensed water storing device is delivered to a condensed water pipe; when a condensing cover is cooled by using the condensed water, the water is delivered to a heat dissipating device; after a heat dissipating process, the water is delivered back to the condensed water storing device. Water amount in a distilling tank is supplemented by the water in the condensed water storing device through a water supplying pipe. Water in the distilling tank is heated into steam, and is delivered into a steam guidance sleeve pipe; the steam is pre-cooled during a lifting process, and flows from an upper port of the steam guidance sleeve pipe. With a curved flow guide plate, the steam is diffused into a cooling chamber, and the heat is transferred to cooling water in the condensed water pipe through condensing sheets. The steam is condensed into water, and flows from a distilled water outlet. The water level is detected by using a liquidometer. When the water level is lower than a lower limit, a water level adjusting valve is opened, and water is supplemented to the condensed water storing device. According to the invention, a condensed water circulation and utilization method is adopted, such that water resource is saved; water is supplied to the distilling tank, such that automatic continuous operation is realized; with the curved flow guide plate and the condensing sheets in a condensing device, condensing efficiency is improved, the heat exchange efficiency is high, and a unit time yield is high.

Description

technical field [0001] The invention relates to an apparatus for preparing distilled water in a laboratory, in particular to a water circulation method for a laboratory water circulation type distiller. Background technique [0002] In experiments in hospitals, pharmaceutical factories, biological preparation companies, scientific research institutes and schools, a large amount of distilled water is often used, including single distilled water, double distilled water and triple distilled water. To make distilled water, tap water needs to be heated until it boils to become a vapor state and then separated from other impurities, and then the water vapor is condensed through a cooling tube to return to a liquid state to become distilled water. For this reason, the process of making distilled water requires a large amount of water for cooling, and the cooling water is directly discharged into the sewer because there is no recovery device, causing a lot of waste. [0003...

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Problems solved by technology

For this reason, the process of making distilled water requires a large amount of water for cooling, and the cooling water is directly discharged into the sewer because there is no recovery device, resulting in a lot of waste

[0003] During the preparation of distilled water, we found that no matter what type of laboratory water distillers are sold on the market, their defects mainly include the following points: First, the heaters are mostly spiral heating tubes, and Installed in the heating barrel, in order to prevent dry burning, it is required to keep the water level higher than the height of the spiral heating tube during the heating process, which requires a large initial water consumption; moreover, long-term and repeated heating, the spiral heating tube Scale will form on the surface and affect heat exchange. These factors not only increase power consumption, but also reduce output efficiency

Second, the scale on the surface of the spiral heating tube and the inner wall of the heating barrel is not easy to remove, and it is inconvenient to maintain, because the spiral heating tube is fixed at the bottom of the heating barrel

Third, there is no recovery device for cooling water, and it is directly discharged into the sewer, resulting in a waste of water resources

According to experimental calculations, for every 10L of distilled water (10L / h) prepared by a single water still, about 200L of cooling water is required. If a laboratory uses 20L of distilled water per day, then nearly 120 tons will be wasted in one year (calculated on the basis of 300 days). Water, the water consumption of double stills and triple stills is even more

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