Daily maintenance of glassware for fully automatic integrated distillation

Daily maintenance of glassware for fully automatic integrated distillation

The fully automatic integrated distillation instrument incorporates a unique design concept based on traditional instruments, such as uniform heating, volume control of distillation end point, anti-back suction, cooling water circulation cooling and reflux device. The integrated universal distillation instrument realizes the purpose of simple operation, beautiful and practical, energy saving and consumption reduction, etc. It can be widely used in environmental protection, food testing, disease control, water supply and drainage, universities, research institutes, factories and mines, etc. Sites such as volatile phenol, ammonia nitrogen, sulfur dioxide and other items of distillation treatment. At present, more and more users are beginning to choose an integrated distillation apparatus for sample pretreatment distillation. How to maintain the operation of the instrument during use?

The fully automatic integrated distillation apparatus is composed of a 6-unit heating device. When the glass distillation vessel is used to wash the instrument, the hand should be washed first, so that the oil on the hand is attached to the instrument, which increases the difficulty of washing, and the general all-glass Distillers, such as beakers, flasks, conical flasks, test tubes, and graduated cylinders, can be brushed with water from the outside to the inside to scrub off water-soluble substances, partially insoluble materials, and dust. If there is organic matter such as oil, it can be soaked in a certain concentration of detergent aqueous solution for a certain period of time, then scrubbed with a detergent brush, then rinsed with tap water, and then rinse the inner wall with purified water for 2 to 3 times. The inner wall of the cleaned glass instrument should be able to be evenly wetted by water without water streaks and without water droplets. Glass equipment is often used for grinding, and care should be taken to protect the grinding when washing.

The glass distillation vessel shall be cleaned immediately after use. For the different sediments remaining in the filter sand core, the solid precipitated on the surface of the sand core is dissolved by a suitable detergent, and then the sand core is repeatedly washed with a decompression method. The remaining sediment was washed away and rinsed with distilled water. A glass instrument with a grinder for preparing and containing a high-concentration solution, such as a volumetric flask, a colorimetric tube, a burette, etc., should be poured out in time, discarded or placed in a reagent bottle for storage, and Clean in time to prevent solute precipitation, block the grinding plug, and damage the glass instrument.

The glass distillation vessel cleaning step, cut off the power supply, close the tap water switch, and remove the condenser tube, but do not need to remove the plastic tube. Carefully add about 100 ml of concentrated hydrochloric acid to the horizontal flask, and dilute with the water in the bottle to dilute hydrochloric acid. If the scale is more, the amount of hydrochloric acid may be more. After a few minutes, it is discharged by the water level device and then washed several times with tap water. In order to remove traces of hydrochloric acid, the flask can be inserted back and forth to clean the dead corners that are difficult to clean. After re-distillation, the water distilled in 10 minutes was started and discarded.

After cleaning the instrument, after a certain period of distillation, the scale accumulates in the horizontal flask and the surface of the quartz heating tube. At this time, cleaning is required. The number of cleaning depends mainly on the hardness and usage time of the tap water. Cleaning should affect the distillation effect, severely damage the heating tube, and the cleaning time should be extended.