Less steam for every tonne of paper

ProblemBlow-through from a group’s separator goes to the next group, the condenser or the vent, and trapped drums flood as the machine speeds up.

What changesOne variable-nozzle Jetomat per group draws the separator vapour back into the same group header. The drums drain at any speed, and the blow-through is used again instead of dumped.

ProblemCondensate from the groups lands in an open or low-pressure tank, and its flash goes up the vent.

What changesA closed flash vessel collects the group condensate, and a Jetomat lifts its flash into the lowest-pressure group.

ProblemA Yankee is one cylinder with no lower group, so all its blow-through has to come back to it; when it cannot, the cylinder floods and the sheet dries unevenly.

What changesA Jetomat on the Yankee supply brings all the blow-through back under flow control, with a pressure override and a controlled warm-up.

ProblemOn kraft and board machines the MG cylinder carries a Yankee-type steam duty inside the dryer section, and often sets the machine’s speed.

What changesThe same single-cylinder scheme as the Yankee: a Jetomat returns the MG’s blow-through and keeps the cylinder draining as the speed goes up.

ProblemOn a sheet break the condensing load collapses; fixed differential control keeps blowing through, and the steam goes to the vent.

What changesFlow control on the Jetomat’s spindle, with a pressure low-select, follows the load down on a break and back up after it, on one nozzle body.

ProblemHigh-pressure steam is throttled down to dryer pressure at the reducing station, while flash vents at low pressure elsewhere on the machine.

What changesA Jetomat uses the same pressure drop to lift that flash to header pressure; the reducing station stays as the standby.

ProblemStoves and vessels on the pulp side need more pressure than the low-pressure header gives, so each fill takes longer.

What changesA controlled Jetomat blends low-pressure steam with high-pressure motive steam and delivers the pressure the stove needs, so more goes through each fill.

ProblemYankee hood air is often heated by its own steam coil, while the Yankee’s condensate flashes to atmosphere.

What changesFlash from the Yankee’s condensate heats the hood’s fresh air in a preheater coil, so the coil needs less live steam.

ProblemCondensate is dumped or comes back cold to an open feed tank, and the boiler takes cold, oxygen-rich water.

What changesClosed condensate return to a pressurised deaerator keeps the feedwater hot and the oxygen out, and keeps the treated water in the plant.

ProblemMany mills do not know the steam to each dryer section, and leaking traps and valves go unseen.

What changesA compensated steam meter on the machine main sets the baseline, and an acoustic survey shows which traps and valves leak, so every change is measured against it.