Hygrophylax
Patent Pending · Docket HYGR-001-PROV Rev.2

The Moisture Guardian
of Wood-Dust Combustion

Real-time NIR moisture sensing drives coordinated adaptive control of swirl geometry, staged air, fuel feed, and plasma ignition — eliminating upstream pre-drying from 5% to 45% moisture.

Conventional: feedstock must be pre-dried to <15% moisture. Dryer = cost + explosion hazard.
How It Works Licensing Inquiries
⬡ Adaptive Control Console — Live Demo
Feedstock Moisture
20% w/w
⚠ ROTARY DRUM DRYER REQUIRED — 18% energy penalty
Swirl Vane Angle
47°
Primary Air Fraction
38%
Fuel Feed Rate
62 kg/hr
Ignition Energy
22 J
Equivalence Ratio (λ)
1.08
● FLAME STABLE
Move the moisture slider to see adaptive control in action
The Problem

Conventional Combustion Demands Dry Fuel.
Nature Delivers Wet Wood.

Every conventional wood-dust suspension combustion system carries a hidden dependency: the fuel must be pre-dried to below 15% moisture before it can burn stably. That dependency creates three compounding problems.

🔥

Fire & Explosion Hazard

Rotary drum dryers processing wood-dust at elevated temperature are the primary NFPA 664-regulated explosion risk in biomass facilities. The dryer is the most dangerous piece of equipment in the plant — and current systems cannot operate without one.

⚡

Parasitic Energy Drain

Pre-drying consumes 15–25% of the gross energy content of the fuel. Operators burn fuel to dry fuel — a circular energy penalty that erodes the economics of biomass power generation before a single kilowatt reaches the grid.

📉

Feedstock Inflexibility

Species variation, seasonal rainfall, and storage conditions produce feedstock moisture swings from under 10% to over 40%. Conventional combustion systems cannot track these variations in real time — operators must either reject wet fuel or accept unstable combustion.

↓ Hygrophylax eliminates all three ↓
The Solution

Four Parameters. One Sensor. Real-Time Adaptation.

Hygrophylax replaces the pre-dryer with intelligence. An in-stream NIR sensor reads incoming feedstock moisture at 10 Hz. The PLC references a moisture-indexed parameter map and simultaneously adjusts all four combustion parameters within a 2-second control loop — maintaining stable, self-supporting flame from 5% to 45% moisture.

1

In-Stream NIR Sensing

Near-infrared sensors (1,400–1,900 nm water absorption band) measure feedstock moisture at ≥10 Hz, capturing transient moisture variations before they reach the burner.

2

Moisture-Indexed Map Lookup

The PLC indexes a calibration-derived parameter map: for each moisture value, a unique coordinated set of targets for all four parameters is retrieved simultaneously.

3

Variable-Geometry Swirl Control

A servo-driven swirl-vane assembly adjusts burner nozzle geometry from 15° (wet fuel, reduced restriction) to 75° (dry fuel, high recirculation) — responsive to the moisture-derived control signal.

4

Staged Air Redistribution

Primary, secondary, and tertiary combustion air streams are independently re-metered. High-moisture feedstock receives reduced primary air fraction to prevent flame blow-off during the extended evaporative phase.

5

Plasma Ignition Scaling

A variable-energy plasma igniter delivers 1–50 J/pulse. High-moisture feedstock commands higher ignition energy to compensate for the elevated evaporative load on the ignition zone.

6

Flame Stability Confirmation

UV/IR flame sensors, pressure oscillation monitoring, and flue gas O₂/CO analysis confirm stable combustion within the 2-second loop. Closed-loop feedback updates the parameter map continuously.

Market Opportunity

Every Biomass Plant With a Dryer
Is a Retrofit Target

The Hygrophylax retrofit claim family (Claims 43–46) addresses every existing installed combustion system without requiring greenfield construction. The market already exists — it just doesn't know it can eliminate its dryer.

150+
Large-scale biomass power plants operating globally, each carrying a pre-drying dependency
$1–2M
Average rotary drum dryer capital cost per installation — eliminated by Hygrophylax retrofit
18%
Average parasitic energy penalty of pre-drying — operators burn fuel to dry fuel before combustion
$150–400K
Estimated annual savings per plant from dryer elimination (energy + maintenance + insurance)
9+
Enviva pellet plants in the pre-bankruptcy fleet — each with pneumatic conveyance and pre-dryers
NFPA 664
Compliance burden eliminated when the dryer leaves the plant — reduces explosion risk classification
Retrofit Economics (Illustrative)

A licensing fee of $50–100K + royalty per plant delivers a <12-month payback for the operator on dryer energy savings alone — before accounting for capital recovery on the retired dryer, reduced insurance premiums, and NFPA 664 compliance cost elimination. At 20 plants, that's a $1M–2M licensing base plus ongoing royalties.

Control System Simulator

The Moisture-Indexed Parameter Map
Live Demonstration

This is the actual control architecture of HYGR-001-PROV Claims 23–27. Move the slider to see all four parameters adapt in real time. Toggle modes to see what happens to conventional combustion above 15% moisture.

⬡ Hygrophylax Adaptive Control Simulator · HYGR-POC-001 Patent Pending
Feedstock Moisture
20% w/w
✓ FLAME STABLE — Adaptive control maintaining combustion at 20% moisture
Swirl Vane Angle
57°
Primary Air Fraction
42%
Fuel Feed Rate
60 kg/hr
Plasma Ignition Energy
18 J
1.070
Equiv. Ratio (λ)
1,310°C
Est. Flame Temp.
3.8%
Flue Gas O₂
295 ppm
Est. CO
Control Loop Event Log
Move slider to generate step-change events...
Freedom to Operate

The Prior Art Landscape:
Public Domain Foundation, Unoccupied Adaptive Layer

The general process of converting wood to combustible powder and burning it for electricity has been in the public domain since the 1970s. No entity holds — or can hold — a blocking patent on that general concept. Hygrophylax's proprietary value lies entirely in the real-time adaptive control architecture built on top of this public-domain foundation.

Reference Patent / Date What It Teaches What It Does NOT Teach FTO Status
Baardson U.S. 3,831,535 · 1974 Wood waste dried & pulverized to max 7.9 mm; burned in refractory-lined chamber Real-time moisture sensing; adaptive parameter control; operation without pre-drying PUBLIC DOMAIN
Eneroth (Flakt) U.S. 4,229,183 · 1980 Simultaneous grinding & drying to fixed 10–15% moisture target; air suspension injection Variable-moisture operation; NIR sensing; coordinated 4-parameter adaptation PUBLIC DOMAIN
Bio-mass Suspension Burner U.S. 4,565,137 · 1985 Cyclonic suspension burner with primary/secondary/tertiary air and swirl vortex Variable swirl geometry; moisture-responsive actuation; adaptive control architecture PUBLIC DOMAIN
Hog Fuel Suspension Firing WO 1987/000604 · 1987 Establishes particle size requirements for cold-wall boiler combustion without fossil support Real-time moisture tracking; variable-geometry burner; adaptive ignition energy PUBLIC DOMAIN
Powdered Fuel Production US 20140352854A1 · 2014 Grinding, spark detection, baghouse, air classification integrated process Combustion-side adaptive control; moisture-indexed parameter map; dryer elimination LOW — Different process stage
Biomass Pulverizing (Mitsubishi) U.S. 8,899,163 · 2014 Roller mill with jet air for biomass/coal co-firing pulverization Combustion-side moisture adaptation; swirl-vane control; plasma ignition scaling LOW — Equipment-side only
✓ Hygrophylax Novelty Statement (HYGR-001-FTO): No identified prior art teaches or suggests coordinated real-time multi-parameter combustion adaptation driven by in-stream NIR moisture sensing, operating without upstream pre-drying, across a moisture range of 5%–45% by weight. The inventive combination is clear to proceed. OEM equipment-side patents (Babcock & Wilcox, Mitsubishi Power, combustion control OEMs) remain subject to professional search prior to non-provisional filing.
IP Portfolio · HYGR-001-PROV Rev.2

Nine Independent Claim Families.
46 Claims. FTO-Refined.

The HYGR-001-PROV Rev.2 provisional was tightened based on FTO research. Each independent claim now carries an explicit positive limitation on operation without upstream pre-drying, anchoring Hygrophylax's differentiation from the public-domain prior art floor.

Family 1 · Claims 1–6

Full System Apparatus

NIR sensor array + moisture-indexed parameter map + coordinated PLC control of swirl vanes, staged air, fuel feed, and plasma ignition — all within 2-second loop — without upstream pre-drying.

✓ FTO: LOW RISK
Family 2 · Claims 7–12

Method of Adaptive Combustion

Method of supplying variable-moisture wood-dust without pre-drying, measuring NIR moisture, indexing the parameter map, and simultaneously adjusting all four parameters within 2 seconds.

✓ FTO: LOW RISK
Family 3 · Claims 13–17

Point-of-Generation Power System

Hygrophylax combustion unit integrated with waste-heat boiler, steam turbine-generator, and facility energy management system. On-site power from local wood-dust waste streams, no dryer required.

⚠ FTO: MODERATE — Claim breadth; tightened per Rev.2
Family 4 · Claims 18–22

Variable-Geometry Swirl-Vane Assembly

Standalone servo-driven swirl-vane assembly (15°–75° from axial) with moisture-derived control signal input. Designed for retrofit installation on existing burner nozzles.

✓ FTO: LOW RISK
Family 5 · Claims 23–27

Combustion Control System

Moisture-indexed combustion parameter map encoding unified coordinated sets of 4-parameter targets across 5%–45% moisture range. Commissioning-burn generated map architecture.

✓ FTO: LOW RISK
Family 6 · Claims 28–32

Computer-Readable Medium

Non-transitory CRM encoding the adaptive control algorithm: read NIR signal → index map → issue simultaneous 4-channel control commands → confirm flame stability → update map.

⚠ FTO: MODERATE — Software claim; §101 specificity ensured per Rev.2
Family 7 · Claims 33–37

Commissioning Method

Calibration burn protocol for generating the moisture-indexed parameter map: series of burns at discrete moisture values, recording stable-combustion parameter combinations as coordinated map entries.

✓ FTO: LOW RISK
Family 8 · Claims 38–42

Fuel Handling System

Variable-moisture feedstock collection and conveyance without moisture conditioning, integrated with in-stream NIR sensing and PLC-coordinated combustion control.

⚠ FTO: MODERATE — Tied to real-time moisture feedback per Rev.2
Family 9 · Claims 43–46

Retrofit Method

Method of upgrading existing fixed-geometry suspension combustion systems with Hygrophylax adaptive control. Highest commercial value claim family — enables licensing to installed OEM base.

✓ FTO: LOW RISK — Primary licensing pathway
IP & Entity Status

Patent Pending. Assignee Structure Established.

Hygrophylax operates within the HeOntotita Corporation micro-entity IP framework, consistent with established Hygrophylax venture formation protocol.

Provisional Patent

HYGR-001-PROV Rev.2 on file. 46 claims across 9 independent families. FTO-refined with explicit pre-drying-elimination limitation. Non-provisional deadline: 12 months from provisional filing date.

On File

FTO Assessment

HYGR-001-FTO preliminary memo complete. Core inventive combination: CLEAR. Public-domain prior art foundation confirmed. OEM equipment-side search pending prior to non-provisional filing.

Complete

Assignee Entity

Hygrophylax Corporation — Michigan subsidiary of HeOntotita Corporation (Ubly, MI). Michigan Articles of Incorporation and patent assignment pending. Employment-IP clearance gate required before public disclosure.

Formation Pending

Inventor

Jeffrey D. Retherford, Woodbridge, Virginia. Plant Controller, Mercury Paper Inc. DBA candidate, Capella University (dissertation: standard costing in digital manufacturing). Serial inventor, HeOntotita Corporation portfolio.

Micro-Entity
Proof of Concept · HYGR-POC-001

One Test Series Changes Everything.
Five Moisture Levels. No Dryer.

The bench-scale PoC is the single highest-leverage action available to Hygrophylax today. Estimated cost: $25K–$75K at a university combustion lab. Expected outcome: 10–20× valuation step-up and a concrete technical data package for OEM licensing conversations.

PoC Success Definition

Stable, self-supporting combustion (no fossil fuel support, no upstream dryer) demonstrated at all five target moisture levels — 10%, 20%, 30%, 40%, and 45% w/w — with flame UV sensor continuously within stability envelope for minimum 60 consecutive seconds at each level.

01
Feedstock Preparation
  • 5 batches at 10/20/30/40/45% MC
  • Gravimetric oven verification (ASTM D4442)
  • Sieve analysis — 100% passing 1,000μ
  • No dryer in feedstock supply path
  • Southern Yellow Pine or mixed hardwood
02
Rig Setup
  • Variable-geometry swirl-vane burner (15°–75°)
  • NIR moisture sensor upstream of nozzle
  • Three-zone staged air metering
  • Variable plasma igniter (1–50 J)
  • UV/IR flame sensor + DAQ
03
Calibration Burns
  • Starting parameters from HYGR-001-PROV map
  • Iterate to stable self-supporting flame
  • Record final parameter set per moisture level
  • Build validated moisture-indexed map entries
  • 10-minute stable run per batch
04
Validation & Documentation
  • Repeat runs from validated map
  • Step-change response <2 seconds
  • Full DAQ data package export
  • Video documentation of stable flame
  • Test summary report for licensing

Flame Stability

UV sensor output continuously >0.5V DC for minimum 60 seconds at each moisture level without fossil fuel support

Pressure Stability

Combustion chamber pressure oscillation <±2 in. W.C. throughout stable run period

Flue Gas Quality

Flue gas O₂ maintained 2–5% with CO <500 ppm at each moisture level

No Pre-Drying

No rotary drum dryer or other upstream moisture-conditioning equipment in feedstock supply path for any run

Map Validated

Recorded parameter combinations replicate stable combustion on repeat runs — map confirmed as reliable lookup

Step-Change Response

Control loop response time <2 seconds demonstrated on step-change between adjacent moisture levels

Value Creation

Stage-Gated Valuation.
The PoC Is the Key Unlock.

Each stage delivers a discrete valuation step-up. The bench-scale PoC is the cheapest and highest-leverage action available today.

Today
$50K–
$250K
Provisional patent only. No demonstrated combustion data.
PoC Complete
$500K–
$2M
Stable combustion demonstrated at 5 moisture levels. Data package in hand.
Issued Patent + Field Retrofit
$2M–
$10M
Non-provisional issued. One operating plant retrofit validated.
Multi-Plant Licensing
$10M+
NPV
Fleet licensing deal with Drax / Ørsted class operator or OEM platform agreement.
The PoC economics: Estimated test cost $25K–$75K at a university combustion lab or contract test facility. Expected valuation step-up: 10–20×. The test protocol (HYGR-POC-001) is complete and ready to hand to a lab. This is the recommended immediate next action before any licensing outreach.
Licensing Opportunities

Four Commercialization Pathways

Hygrophylax's retrofit claim family (Claims 43–46) is specifically designed to enable licensing to the existing installed base of biomass suspension combustion equipment. No greenfield installation required.

OEM Retrofit Licensing

License the variable-geometry swirl-vane assembly, NIR sensor integration, and adaptive PLC package to combustion equipment OEMs for incorporation into retrofit upgrade kits for their installed customer base.

Target: Babcock & Wilcox · Mitsubishi Power · ANDRITZ

Biomass Operator Licensing

Direct license to large-scale biomass power operators seeking to eliminate upstream dryer costs and NFPA 664 compliance burden. Enviva-class operators with multi-plant fleets represent repeating royalty streams.

Target: Enviva · Drax · Ørsted biomass supply chains

Point-of-Generation Power

License or joint-venture the distributed point-of-generation power system embodiment (Claims 13–17) to sawmills, paper mills, and biomass pellet plants seeking on-site power from local wood-dust waste streams.

Target: Sawmill & paper mill operators · Wood products manufacturers

Technology Assignment

Full assignment of HYGR-001-PROV and associated IP family available to qualified strategic acquirers. HeOntotita Corporation micro-entity structure is designed for clean, efficient IP transfer.

Target: Strategic combustion technology acquirers
Licensing Inquiries

Ready to Eliminate Your Dryer?

Contact the inventor directly to discuss licensing, joint development, or IP acquisition opportunities.

Inventor & Principal: Jeffrey D. Retherford
Entity: Hygrophylax Corporation / HeOntotita Corporation
Email: jeffrey@hygrophylax.com
Phone: (571) 597-9641
Web: hygrophylax.com