The rapid intelligent sulfur determination instrument belongs to high-precision coal quality testing equipment, and special attention should be paid to daily maintenance and repair. details as follows:
1. The sample delivery unit of the rapid intelligent sulfur determination instrument is a mechanical action and requires frequent maintenance. For example, add some lubricating oil to the small pulley. Do not touch the indicator electrode and electrolytic electrode with your hands, otherwise the electrode will be contaminated. Once the indicator electrode is contaminated, the end point control will fail, often resulting in excessive titration. At this time, the electrode should be scrubbed with ethanol or acetone.
2. When there are black deposits in the sintered glass melting plate and pipeline of the rapid intelligent sulfur determination instrument, it should be cleaned in time. The cleaning method is as follows: open the upper cover of the electrolytic cell, the fusion plate and the electrode are taken out together, first rinse with tap water, put it into the newly prepared cleaning solution (5 g potassium dichromate and 10 ml distilled water, heat to dissolve, after cooling Slowly add 100ml of concentrated sulfuric acid), move up and down, left and right to clean, and then lift the molten plate. After the cleaning liquid is cleaned, use this method to repeatedly clean 2 to 3 times to remove the black sediments in the molten plate and branch pipe . After the melt plate is cleaned, rinse the electrolytic cell with tap water, and use the ear wash ball to pump water from the melt plate branch pipe to leave no washing liquid. The melt plate should be as clean as ever. Absorb the water in the melt plate and its branch pipe with a filter paper strip, and install the electrolytic cell. Turn on the electromagnetic pump, dry the glass melt plate and its branch pipe with air, and add electrolyte to use. The glass piston between the combustion tube and the electrolytic cell can be cleaned with a filter paper strip when there are black deposits.
3. The rapid intelligent sulfur determination instrument should prevent the intrusion of dust and corrosive gas and be used in a dry environment. If it will not be used for a long time, it should be kept properly. The instrument should be handled gently when it is moved, especially the furnace body, to prevent damage to the silicon carbon tube.
4. If the sintered glass plate of the rapid intelligent sulfur determination instrument is cleaned, the flow rate indicated by the flowmeter still cannot reach 1000ml / min, or although it can reach 1000ml / min, but there are no bubbles or few bubbles at the melting plate, check the electromagnetic pump Whether there is any gas leakage to all parts of the electrolytic cell, including successive latex tubes, silicone rubber tubes, rubber ring plugs for gas purification tubes, and electrolytic cells. It should also be checked whether the flowmeter, combustion tube, and drying tube are blocked, and whether the pump wrist is broken.
5. When adding and releasing electrolyte and washing the electrolytic cell, the rapid intelligent sulfur determination instrument should not sprinkle the solution onto the electrode outlet plug. Otherwise, the end point control will fail. At this time, scrub the electrode lead plug with ethanol and acetone.
6. After 3 to 5 days of continuous use of the rapid intelligent sulfur determination instrument, a standard sample shall be used to check once to check whether the combustion tube is broken or other parts are leaked.
7. In order to eliminate the deflagration of the coal sample of the rapid intelligent sulfur determination instrument and reduce the blackening of the glass melting plate, the combustion tube can be filled with aluminum silicate wool with a thickness of 3 ~ 4mm. In order to make the size of the aluminum silicate cotton suitable, the inlet end of the combustion tube can be pressed against the aluminum silicate cotton, and a mark can be made. According to the mark, the round piece of aluminum silicate cotton can be cut off, and the diameter of the head is similar to that of the round piece. The rod pushes the aluminum silicate wool to the rear edge of the high temperature zone, or a little is installed on the glass pipe between the electrolytic cell and the combustion tube.
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