What issues should be noted when maintaining the tobacco raw paper production line
2026-04-02
The maintenance of tobacco raw paper production line (regenerated tobacco leaves by papermaking method) focuses on the characteristics of high viscosity, easy scaling, and easy mold growth of the raw materials. The key is to do a good job in cleaning, anti blocking, anti-corrosion and anti rust, precise lubrication, safety lock control, and quality linkage to avoid pulp residue, roller surface scaling, medium corrosion, and electrical hazards.
1、 Daily maintenance (per shift/day): anti blocking, cleaning, and spot checks
Crushing/mixing system
Thoroughly clean the pulper, pulp tank, pipeline, sieve plate, and filter screen in each shift, and remove tobacco fibers, tobacco paste, and dust clumps.
Check the sealing of the mixer and pump body to prevent slurry leakage, air intake, and blockage.
Flush the pipelines, valves, and flow meters to prevent residual nicotine and sugar from scaling, fermentation, and mold growth.
Slurry box and mesh section
Clean the lip plate, nozzle, weir plate, and corrector to ensure that the slurry is uniform, does not hang, and does not deviate.
Check the forming net: no damage, no scale buildup, normal deviation, and smooth spraying.
Vacuum box and suction roller: unobstructed holes, stable vacuum, no blockages, and no missing edges.
Squeezing section (key blockage prone area)
Woolen cloth: washed every shift, with no residue of pulp, no shedding of hair, no indentation, and no deviation.
Pressure roller: Smooth surface, no adhesive, no hard spots, no cracks.
Check the pressing pressure, synchronicity, tire pressure, and sealing to prevent deviation and breakage.
Dry cadres (in areas severely affected by high temperature bonding)
Drying cylinder surface: clean the cylinder in each shift, free of coking materials from smokeless leaves, no sticky paper, and no hard scale.
Steam hood and hot air duct: no dust accumulation, no condensation water, and smooth ventilation.
Guide roller and tension roller: flexible rotation, no paper wrapping, and no dirt accumulation.
Press/Roll/Finish
The roller surface is clean and free of scratches; The cutting blade is sharp and there is no accumulation of paper scraps.
Tension, correction, length measurement, and defect detection are normal and effective.
General mandatory (per class)
Lubrication: Apply grease/oil according to the point, quality, and quantity, without leakage or overheating.
Tightening: The bolts, couplings, and protective covers are not loose.
Safety: Emergency stop, interlock, limit, and protective cover are intact and effective.
Record: operating parameters, abnormalities, cleaning, lubrication, and spot checks.
2、 Regular maintenance (weekly/monthly/quarterly/annual): deep cleaning, anti-corrosion, replacement, calibration
weekly
Thoroughly clean the filter screen, screening drum, blanket, spray nozzle, and vacuum system.
Lubricate all bearings, chains, gears, and guide rails.
Check belt tension, wear, roller surface runout, and seal leakage.
monthly
Disassemble and clean key pumps, valves, instruments, and sensors.
Check the hardness of the roller surface, breathability/dehydration of the woolen cloth, and wear of the net.
Electrical: fastening terminals, insulation testing, dust removal, grounding inspection.
Quarterly/Half Year
Replace lubricating oil, hydraulic oil, filter element, seals, and aging hoses.
Calibrate pressure, temperature, flow rate, moisture content, quantity, and tension.
Check the air tightness, steam pipeline, drain valve, and thermal efficiency of the dryer.
Disassemble and inspect the transmission gearbox, bearing seat, and coupling.
annual overhaul
Dismantling, rust removal, anti-corrosion, non-destructive testing, and dynamic balancing of the entire line.
Replace the molding mesh, woolen cloth, dryer bag area, severely worn rollers, and aging electrical components.
Upgrade the control system, optimize parameters, and perform safety joint debugging.
3、 The unique maintenance difficulties and countermeasures of tobacco base paper
Highly adhesive and prone to coking (nicotine/sugar/pectin)
Problem: Drying cylinders, pressure rollers, and mesh fabrics are prone to sticking and scaling, leading to paper disease and paper breakage.
Countermeasure: High temperature and high pressure flushing+specialized cleaning agent; Clean the tank every shift; Regularly polish and repair the roller surface.
Strong corrosion of media (nicotine, organic acids, condensed water)
Problem: Stainless steel/carbon steel is prone to pitting corrosion, weld leakage, and rapid seal aging.
Countermeasure: Choose corrosion-resistant materials/coatings; Regular thickness measurement/flaw detection; Replace seals/gaskets promptly.
Fine fibers, heavy dust, easy to mold
Problem: The filter/nozzle/vacuum hole is prone to clogging; Risk of self ignition due to powder accumulation in air ducts/hoods.
Countermeasure: Strengthen filtration and flushing; Regularly blow away dust; Control environmental humidity.
Multi medium complexity (slurry/steam/water/oil/vacuum/chemicals)
Problem: Cross contamination, leakage, control drift.
Countermeasure: Subsystem maintenance; Clear pipeline identification; Regularly conduct pressure tests to check for leaks.
4、 Safety maintenance red line (absolutely prohibited)
LOTO (Power Off Tag) is strictly prohibited from entering the interior of the equipment, clearing blockages, or conducting maintenance.
Operations in confined spaces (slurry pool, dryer, hood) must be ventilated, tested, monitored, and approved by the Ministry of Emergency Management of the People's Republic of China.
High temperature and high pressure (steam, hot oil, hydraulic): first release pressure, cool down before operation.
Electrical maintenance: electrical inspection, discharge, grounding, and dedicated supervision.
Chemicals (cleaning agents, disinfectants): Wear protective gear according to MSDS. Ministry of Emergency Management of the People's Republic of China.
It is strictly prohibited to cross, wipe, clean, or adjust rotating/high-temperature components during operation.
5、 Quality linkage maintenance (directly affecting the quality of raw paper)
Cleaning of headbox, lip plate, and mesh → uniformity and quantitative stability
Squeezing woolen fabric/roller surface → moisture, smoothness, no pulp spots
Drying cylinder cleaning, uniform temperature → moisture, curling, strength
Cutting blade, calendering roller → Appearance, joints, defects
Instrument calibration → Process stability and consistent quality
6、 Key points of maintenance management
Dedicated person in charge, five fixed lubrication (fixed quality/quantity/timing/fixed point/fixed person)
Standard Operating Procedure (SOP)+Maintenance Checklist
Maintenance records+fault analysis+spare parts list
Prioritize prevention, monitor status, and reduce unplanned downtime
1、 Daily maintenance (per shift/day): anti blocking, cleaning, and spot checks
Crushing/mixing system
Thoroughly clean the pulper, pulp tank, pipeline, sieve plate, and filter screen in each shift, and remove tobacco fibers, tobacco paste, and dust clumps.
Check the sealing of the mixer and pump body to prevent slurry leakage, air intake, and blockage.
Flush the pipelines, valves, and flow meters to prevent residual nicotine and sugar from scaling, fermentation, and mold growth.
Slurry box and mesh section
Clean the lip plate, nozzle, weir plate, and corrector to ensure that the slurry is uniform, does not hang, and does not deviate.
Check the forming net: no damage, no scale buildup, normal deviation, and smooth spraying.
Vacuum box and suction roller: unobstructed holes, stable vacuum, no blockages, and no missing edges.
Squeezing section (key blockage prone area)
Woolen cloth: washed every shift, with no residue of pulp, no shedding of hair, no indentation, and no deviation.
Pressure roller: Smooth surface, no adhesive, no hard spots, no cracks.
Check the pressing pressure, synchronicity, tire pressure, and sealing to prevent deviation and breakage.
Dry cadres (in areas severely affected by high temperature bonding)
Drying cylinder surface: clean the cylinder in each shift, free of coking materials from smokeless leaves, no sticky paper, and no hard scale.
Steam hood and hot air duct: no dust accumulation, no condensation water, and smooth ventilation.
Guide roller and tension roller: flexible rotation, no paper wrapping, and no dirt accumulation.
Press/Roll/Finish
The roller surface is clean and free of scratches; The cutting blade is sharp and there is no accumulation of paper scraps.
Tension, correction, length measurement, and defect detection are normal and effective.
General mandatory (per class)
Lubrication: Apply grease/oil according to the point, quality, and quantity, without leakage or overheating.
Tightening: The bolts, couplings, and protective covers are not loose.
Safety: Emergency stop, interlock, limit, and protective cover are intact and effective.
Record: operating parameters, abnormalities, cleaning, lubrication, and spot checks.
2、 Regular maintenance (weekly/monthly/quarterly/annual): deep cleaning, anti-corrosion, replacement, calibration
weekly
Thoroughly clean the filter screen, screening drum, blanket, spray nozzle, and vacuum system.
Lubricate all bearings, chains, gears, and guide rails.
Check belt tension, wear, roller surface runout, and seal leakage.
monthly
Disassemble and clean key pumps, valves, instruments, and sensors.
Check the hardness of the roller surface, breathability/dehydration of the woolen cloth, and wear of the net.
Electrical: fastening terminals, insulation testing, dust removal, grounding inspection.
Quarterly/Half Year
Replace lubricating oil, hydraulic oil, filter element, seals, and aging hoses.
Calibrate pressure, temperature, flow rate, moisture content, quantity, and tension.
Check the air tightness, steam pipeline, drain valve, and thermal efficiency of the dryer.
Disassemble and inspect the transmission gearbox, bearing seat, and coupling.
annual overhaul
Dismantling, rust removal, anti-corrosion, non-destructive testing, and dynamic balancing of the entire line.
Replace the molding mesh, woolen cloth, dryer bag area, severely worn rollers, and aging electrical components.
Upgrade the control system, optimize parameters, and perform safety joint debugging.
3、 The unique maintenance difficulties and countermeasures of tobacco base paper
Highly adhesive and prone to coking (nicotine/sugar/pectin)
Problem: Drying cylinders, pressure rollers, and mesh fabrics are prone to sticking and scaling, leading to paper disease and paper breakage.
Countermeasure: High temperature and high pressure flushing+specialized cleaning agent; Clean the tank every shift; Regularly polish and repair the roller surface.
Strong corrosion of media (nicotine, organic acids, condensed water)
Problem: Stainless steel/carbon steel is prone to pitting corrosion, weld leakage, and rapid seal aging.
Countermeasure: Choose corrosion-resistant materials/coatings; Regular thickness measurement/flaw detection; Replace seals/gaskets promptly.
Fine fibers, heavy dust, easy to mold
Problem: The filter/nozzle/vacuum hole is prone to clogging; Risk of self ignition due to powder accumulation in air ducts/hoods.
Countermeasure: Strengthen filtration and flushing; Regularly blow away dust; Control environmental humidity.
Multi medium complexity (slurry/steam/water/oil/vacuum/chemicals)
Problem: Cross contamination, leakage, control drift.
Countermeasure: Subsystem maintenance; Clear pipeline identification; Regularly conduct pressure tests to check for leaks.
4、 Safety maintenance red line (absolutely prohibited)
LOTO (Power Off Tag) is strictly prohibited from entering the interior of the equipment, clearing blockages, or conducting maintenance.
Operations in confined spaces (slurry pool, dryer, hood) must be ventilated, tested, monitored, and approved by the Ministry of Emergency Management of the People's Republic of China.
High temperature and high pressure (steam, hot oil, hydraulic): first release pressure, cool down before operation.
Electrical maintenance: electrical inspection, discharge, grounding, and dedicated supervision.
Chemicals (cleaning agents, disinfectants): Wear protective gear according to MSDS. Ministry of Emergency Management of the People's Republic of China.
It is strictly prohibited to cross, wipe, clean, or adjust rotating/high-temperature components during operation.
5、 Quality linkage maintenance (directly affecting the quality of raw paper)
Cleaning of headbox, lip plate, and mesh → uniformity and quantitative stability
Squeezing woolen fabric/roller surface → moisture, smoothness, no pulp spots
Drying cylinder cleaning, uniform temperature → moisture, curling, strength
Cutting blade, calendering roller → Appearance, joints, defects
Instrument calibration → Process stability and consistent quality
6、 Key points of maintenance management
Dedicated person in charge, five fixed lubrication (fixed quality/quantity/timing/fixed point/fixed person)
Standard Operating Procedure (SOP)+Maintenance Checklist
Maintenance records+fault analysis+spare parts list
Prioritize prevention, monitor status, and reduce unplanned downtime
