Submerged pump a wide range of transport medium temperature and working pressure of different, depending on the nature of the transport medium can be divided into molten salt submerged pump, sulfuric acid submerged pump, acid-base submerged pump, liquid submerged pump, sulfur Submerged pump, submerged pump and so on. Submerged pumps are widely used in petrochemical, coal chemical and other chemical industries, the transmission of different properties of the liquid to provide the chemical reaction pressure, flow. Therefore, the effective extension of liquid pump life cycle, reduce the amount of maintenance, to improve the economic efficiency of the plant has a significant role. The choice and installation of submerged pump Submerged pump should be selected in accordance with the delivery of liquid, and check the performance required, analysis of pumping, discharge conditions, is intermittent operation or continuous operation. Submerged pumps should normally be operated at or near the pressure and flow rates specified by the manufacturer's design. Submerged pump installation should be carried out the following review: ①According to the liquid pump under the characteristics of the media, if necessary, check the main parts, shaft seals and gasket material. ② The size, location and elevation of the foundation should meet the design requirements. The anchor bolts must be properly and correctly fixed on the concrete foundation. The machine should not be missing, damaged or corroded. ③ liquid pump level, find work should be consistent with the provisions of technical documents, if there is no provision, should be consistent with the current national standard "mechanical equipment installation engineering construction and acceptance of the general specification" requirement. ④ All connected with the pump pipe, pipe fittings and oil pipe cleaning requirements should be consistent with the relevant national standards. Second, the use of submerged pump pump test run should meet the following requirements: 1. The fixed connection parts should be no loose, lubricated parts of the lubrication specifications and quantity should be consistent with the provisions of technical documents; 2. Identify the pipeline Pump and coaxial pump steering. 3. The steering of the driver should be the same as the steering of the submerged pump. 4. Pre-lubrication requirements of the site should be pre-lubricated. 5. The indicating instruments, safety devices should be sensitive, accurate and reliable. 6. Coil should be flexible, no abnormalities. 7. Set to eliminate the impact of temperature rise of the connection device, set the bypass connection device to provide cooling water. 8. High temperature liquid pump should be carried out before commissioning pump body preheating, the temperature should rise evenly, the temperature rise per hour should not exceed 500 ℃; pump the surface of the working medium with a working medium inlet temperature difference should not be too high. Liquid pump operation should pay attention to the following points: 1. Lubricants do not use too much. 2. Check the recommended cycle. Establish operating records including operating hours, packing adjustments and replacements, adding lubricants and other maintenance measures and times. Suction and discharge on the pump pressure, flow, power input, lotion and bearing temperature and vibration conditions should be measured regularly recorded. 3. Make sure the mechanical seal has a flush of water, and water-cooled bearings prohibit the use of excess water. 4. Do not operate without water, do not adjust the suction port to reduce the displacement, prohibit running at too low a flow rate. 5. Monitor the operation, completely prevent the stuffing box from leaking, replace the stuffing box with new stuffing.
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