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Chain conveyor troubleshoot guide

  Problem Identification & Corrective Action Sl No. Problem Potential Cause Solution 1 Chain rises off from sprocket 1.Excess chain slack. 2.Excess wear at the bases of sprocket teeth. 3.Excess chain extension. 4.Foreign material stuck to the bases of sprocket teeth. 5.Reverse rotation of conveyor 6.Uneven chain tightening of chain 1.Adjust the amount of slack equally at both sides. 2.Carryout hard facing of the sprockets 3.Replace the elongated chain parts. 4.Remove the foreign material from the bases of the teeth. 5.Avoid reverse rotation of the conveyor when chain tightened is uneven 2 Chain separates poorly from the sprocket. 1.Sprocket misalignment. 2.Excess chain slack. 3.Excess wear at the bases of sprocket teeth. 4.Uneven chain tightening of chain 1-Adjust alignment. 2-Adjust the amount of slack.

Questions & Answers on Boiler feed pumps design , operation & maintenance

    DESIGN DATA FOR BOILER FEED PUMPS   Design data from site: Ø    Type of liquid handled and its maximum & minimum temperatures Ø    Water qualities like pH & Hardness Ø    Water Kinematic Viscosity (cst) Ø    Specific gravity of water at operating temperature Ø    Net positive suction head required (NPSHR)& available (NPSHA) Ø    Boiler capacity & operating pressure Ø    Maximum & operating blow down rate of Boiler Ø    Height of Steam drum Ø    Height of Deaerator (Water inlet source) Ø    Pressure drop in Economiser Ø    No.of valves used in feed water discharge line & corresponding pressure drop as per standard. Ø    Maximum & minimum suction pressure available at pump suction Ø    Type of cooling water & its maximum flow available for bearings cooling   Pump Design Data: Ø    Rated flow (M3/hr) Ø    Rated head (meters) Ø    Nominal speed & Effective speed (RPM) (NS > ES) Ø    NPSHR (meter) Ø    Pump

Boiler Feed Pumps Design factors & Pump Capacity calculation

  DESIGN DATA FOR BOILER FEED PUMS   Design data from site:   Ø   Type of liquid handled and its maximum & minimum temperatures Ø   Water qualities like pH & Hardness Ø   Water Kinematic Viscosity (cst) Ø   Specific gravity of water at operating temperature Ø   Net positive suction head required (NPSHR)& available (NPSHA) Ø   Boiler capacity & operating pressure Ø   Maximum & operating blow down rate of Boiler Ø   Height of Steam drum Ø   Height of Deaerator (Water inlet source) Ø   Pressure drop in Economiser Ø   No.of valves used in feed water discharge line & corresponding pressure drop as per standard. Ø   Maximum & minimum suction pressure available at pump suction Ø   Type of cooling water & its maximum flow available for bearings cooling   Pump Design Data: Ø   Rated flow (M3/hr) Ø   Rated head (meters) Ø   Nominal speed & Effective speed (RPM) (NS > ES) Ø   NPSHR (meter) Ø   Pump & Motor effici
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