Today
A fixed profile sized for the hardest case
- Zone setpoints are fixed per product family for the toughest product.
- Evaporation load varies while the profile stays put.
- Bond risk is managed by keeping the hot zone conservatively cool.
Underdry and the board is wet.Overdry and the paper falls off.
The wallboard dryer is often the largest gas consumer in the plant, and it usually runs a fixed zone profile sized for the hardest product on the schedule. INSUS models exit moisture and paper bond risk per product and recommends multi-zone temperature, humidity and airflow profiles that meet the evaporation load with less heat. Engineers review every change.
01
Wet board and bond failure bound the operating window.
02
Evaporation load shifts; fixed profiles often do not.
03
Bond risk stays a hard constraint.
The problem
The biggest burner in the plant,run to a fixed recipe.
Board drying is bounded on both sides. Under-dry and the board is unsaleable; over-dry and the gypsum crystals that bond paper to core can dehydrate and the paper peels. Evaporation load moves with water-to-stucco ratio, thickness, product mix, line speed and gaps in the board stream, while zone setpoints often stay flat. Most lines therefore run hot enough for the worst case, spending gas on margin.
01Load shifts with water ratio, thickness and line speed
02Zone setpoints stay flat through the shift
03Heat spent on margin
- 01Load shifts with water ratio, thickness and line speed
- 02Zone setpoints stay flat through the shift
- 03Heat spent on margin
The shift
From a profile for the worst productto a profile for this one.
Dryer and process engineers stay in charge of every profile change. What changes is whether zone advice matches the board and load currently in the dryer, with bond risk modelled from this plant's history.
With INSUS
A recommended profile for the board in the dryer
- Zone profiles are recommended for the current load and product.
- Advice can respond to water ratio, thickness, line speed and stream gaps.
- Bond risk is modelled from the plant's failure history, not only blanket margin.
How it works
From board segmentto zone recommendation.
This fits OptiStudio as operational decision support layered above the existing dryer control system. Day one is advisory: engineers approve every profile change. Boards with different water contents can sit in the dryer at once, so tracking comes before thermal advice.
Connect
Link dryer zones, board tracking and QC
Read-only links to zone temperature, humidity, airflow and burner input, board tracking from the forming line, mixer water per segment, MES board spec and line speed, gas metering, exit moisture where fitted, and QC including bond failures and wet-board rejects.
Understand
Learn what caused wet board and bond failures
Learn how exit moisture and bond outcomes have depended on zone profiles, residence time, thickness and incoming water on this dryer. Bond risk is defined from the plant's own failure history.
Predict
Forecast exit moisture and bond risk
Track each board segment through the zones and estimate exit moisture and modelled bond risk under candidate profiles before a change is applied.
Advise
Recommend the lowest-gas profile inside the bond constraint
Rank zone temperature, humidity and airflow options that meet the exit-moisture target at lower gas input, with bond risk as a hard constraint. Show the bond-risk margin with every recommendation.
Verify
Report gas and quality together
Compare predicted exit moisture and gas with actual results. Any recommendation that saves gas and produces a bond failure is treated and reported as a model failure.
Getting started
Layered above your dryer control,not in place of it.
For wallboard plants with zone-level dryer instrumentation and board tracking. Delivered through OptiStudio as advisory process decision support. Expert Services can help with discovery and shadow-mode validation. Headroom above an incumbent dryer control system is plant-specific and should be checked before anything is promised.
- What we need. Dryer zone historian coverage for temperature, humidity, airflow and gas; board tracking and mixer water per segment; line speed, board spec and product schedule; and QC including bond failures and wet-board rejects.
- What you see first. A calibrated per-zone drying view and a bond-risk model from your failure history, running in shadow with the bond-risk margin shown on every recommendation.
- How it grows. After validation across the normal schedule including changeovers, and back-tests against past bond failures, move to supervised recommendations and additional lines as outcomes support it.
Related for gypsum
Other gypsumstarting points
Dryer zone thermal advice sits beside mixer water ratio and calciner consistency on the same board line.
- 01Water-to-Stucco Ratio OptimizationRecommend gauging water at the mixer so excess water is not the only processability insurance before it reaches the dryer.
- 02Stucco Calcination ConsistencyEstimate stucco water demand from calciner and feed data so consistency is managed at the calciner, not only compensated downstream.
- 03Gypsum industryThe wider picture for calcination consistency, slurry water and board dryer energy.
Questions wallboard dryer teams ask us
Fixed dryer profiles sized for the hardest product spend gas on margin while evaporation load shifts through the shift. This use case recommends zone profiles for the board actually in the dryer, with paper bond risk as a hard constraint.
Zone historian tags for temperature, humidity, airflow and gas; board tracking and mixer water per segment; line speed and board spec; and QC including bond failures and wet-board rejects. Exit-moisture measurement strengthens validation where fitted.
No. It layers advisory recommendations above the existing dryer control. Engineers approve every profile change. Discovery should check what the incumbent system already covers.
Not where the dryer has zone-level instrumentation and the line tracks board segments. Missing exit-moisture measurement weakens validation and is a separate plant decision.
Bond risk is a hard constraint learned from your failure history, with the margin shown on every recommendation. Shadow mode comes first. A recommendation that saves gas and causes a bond failure is treated as a model failure.
Water-to-stucco optimization works at the mixer and decides how much water enters the board. This use case works at the dryer and decides how efficiently that water is removed. They pair well, but each can run on its own.
Through OptiStudio as operational decision support for multi-zone dryers. Expert Services can support discovery, data readiness and shadow-mode validation against your own gas and bond-failure baseline.
Gypsum · Dryer thermal optimization
Stop drying every product for the hardest one on the schedule.
See what dryer and QC records say about the margin between how hot you run and how hot you need to, with paper bond risk kept as a hard limit.