Americas Headquarters, North Carolina · Engineering & Manufacturing, Thailand
About Arrow Energy: US–Thai Engineering for Air Pollution Control and Boiler Systems
Arrow Energy is a US–Thai engineering group that designs, manufactures, retrofits and services electrostatic precipitators, proprietary Electrocyclone systems and boiler equipment for biomass, sugar, cement, pulp and paper, and thermal power plants.
The group operates from two hubs. Arrow Energy USA LLC, in Lewisville, North Carolina, holds the Americas — commercial ownership, project coordination and customer engineering across North and Latin America. Arrow Energy Co., Ltd., in Bangkok and Samut Sakhon, Thailand, holds group engineering, R&D and manufacturing.
One engineering organisation, one design basis, one accountable partner — with the commercial and technical interface in your region and the fabrication shop under our own roof.
We solve plant-performance problems — we do not simply supply equipment
Industrial plants rarely need another standard product selected from a catalogue. They need an engineering partner who reads the operating data, identifies the actual performance constraint, and builds a solution around the plant as it exists.
Three problems bring customers to us.
Emissions above the limit
We design and modernise electrostatic precipitators, Electrocyclone systems, bag filters, multicyclones and flue-gas treatment to bring particulate emissions to the required outlet figure — against the fuel actually burned, not the fuel in the original specification.
Boiler reliability and output
We investigate recurring tube failures, combustion limitations, fuel changes, pressure-part condition and heat-transfer losses to restore steam-generation reliability, fuel flexibility and plant availability.
Lifecycle economics
Our solutions account for pressure drop, auxiliary power consumption, fuel use, maintenance requirement, shutdown risk and equipment life — not only the equipment purchase price. The lowest capital cost is frequently the highest ten-year cost.
Engineering before equipment
Most suppliers quote from a catalogue against a nameplate gas volume. That is how an ESP ends up 30% undersized for the fuel the plant actually burns.
We do not quote without a design basis. Before any proposal, we establish:
- Actual gas volume at the ESP inlet — Nm³/h and am³/h, including measured or calculated air ingress across the boiler, ducting and hoppers. Ingress belongs in the volume, not in a margin.
- Gas temperature and composition — including moisture, because wet flue gas at normal conditions is ρ ≈ 1.24 kg/Nm³ and cp ≈ 1.20 kJ/kg·K, not the dry-air values still used in most sizing sheets.
- Inlet dust loading and particle size distribution — g/Nm³ and the sub-10 µm fraction, which sets the collecting area, not the total load.
- Dust resistivity — the collection window is roughly 108–1011 Ω·cm. Outside it, back-corona or re-entrainment governs performance and no amount of installed area compensates.
- Effective migration velocity for the actual fuel — for bagasse and biomass ash this is typically 3–5 cm/s, well below the values assumed in generic sizing. Using a coal-derived figure is the most common cause of an underperforming biomass ESP.
- The required outlet emission and its reference basis — mg/Nm³, dry, corrected to the applicable reference O₂. The correction is applied once. Applying it twice is a frequent and expensive specification error.
- Physical and process constraints — available footprint, existing foundations, allowable pressure drop, ID fan margin, shutdown window.
Only then does equipment selection begin. Where the analysis shows the existing installation can be brought to specification, we say so — a retrofit that works beats a replacement that was never needed.
From first inspection through design, manufacturing, installation, commissioning and lifecycle support, customers work with one accountable engineering organisation.
Two hubs, one engineering organisation
Americas — Arrow Energy USA LLC
- Lewisville, North Carolina, United States
- Commercial ownership for North and Latin America
- ASME-standard engineering and R&D collaboration
- Project coordination in your time zone
- Customer engineering, site assessment, technical response
- English, Spanish and Portuguese technical communication
Engineering & Manufacturing — Arrow Energy Co., Ltd.
- Bangkok (head office) · Samut Sakhon (factory), Thailand
- Group engineering, R&D and design authority
- ASME and JIS certified pressure-part fabrication
- ESP casings, collecting plates, discharge electrodes, gas-distribution systems, hoppers
- Water walls, superheaters, economisers, reheaters, headers, fin-tubes
- Electrocyclone manufacture and development
Owning the factory is not a marketing point — it is what lets us commit to a shutdown date. When a plate profile has to change mid-fabrication, or an emergency electrode set is needed inside a 10-day outage, the decision is made inside our own organisation rather than negotiated through a contract manufacturer. Every fabricated item ships with full material test certificates, manufacturing data records and inspection packages, with third-party inspection available.
Where we work
Company locations
Bangkok, Thailand
Group Head Office
Strategy, engineering coordination and international project support.
Samut Sakhon, Thailand
Manufacturing & R&D
ASME and JIS certified fabrication. ESP internals, casings, gas-distribution systems, boiler pressure parts. Electrocyclone development.
Lewisville, North Carolina, USA
Americas Headquarters
Arrow Energy USA LLC. Commercial ownership, customer engineering and project coordination for North and Latin America.
Jakarta, Indonesia
Asia-Pacific Regional Office
Regional project delivery and client coordination across South-East Asia.
Additional offices: India (country office) · Colombia and the Philippines (representative offices).
Regional presence
Arrow Energy maintains regional presence and serves customers across:
- North America — United States, Canada
- Latin America — Brazil, Colombia, Mexico, Guatemala
- Asia — Thailand, Indonesia, India, the Philippines
Across Latin America the work concentrates in sugar, ethanol and biomass cogeneration — high-ash, variable-moisture fuels, seasonal crush windows and short shutdown envelopes. Across Asia it concentrates in biomass and thermal power, pulp and paper, and industrial steam, where fuel quality varies week to week and the ESP must hold emissions through the variation rather than at a design point.
Both conditions demand the same thing: equipment sized on the fuel actually burned, and an engineering team that will read the operating data before proposing anything.
Electrocyclone: the world’s first commercial hybrid particulate separator
Conventional practice installs a mechanical cyclone ahead of an ESP — two vessels, two foundations, two pressure drops, two maintenance regimes. Electrocyclone integrates both mechanisms into a single vessel.
Stage 1 — centrifugal
Flue gas enters a tangential vortex chamber. Centrifugal acceleration drives particles above roughly 2 µm to the wall and into the hopper, removing 80–90% of the inlet load before any electrostatic treatment.
Stage 2 — electrostatic
The remaining fine fraction is charged by a corona discharge field and collected on grounded plates inside the same vessel — no second unit, no second foundation.
The combined result is 99.9% total collection efficiency at an outlet PM concentration below 30 mg/Nm³ at 7% O₂, dry basis, in one compact unit.
| Collection efficiency | 99.9% |
| Outlet PM concentration | < 30 mg/Nm³ (at 7% O₂, dry basis) |
| Inlet dust concentration | up to 50 g/Nm³ |
| Particle size range | 0.01 – 100 µm |
| Maximum operating temperature | 450 °C |
| Pressure drop | 800 – 1,500 Pa |
| Maintenance | Near-zero — no moving parts in the separation stage |
| Parameter | Cyclone only | ESP only | Electrocyclone |
|---|---|---|---|
| Collection efficiency | 70 – 90% | 95 – 99.5% | 99.9% |
| Outlet PM (mg/Nm³, dry, at 7% O₂) | > 100 | 30 – 50 | < 30 |
| Max operating temperature | No limit | ≤ 400 °C | ≤ 450 °C |
| Maintenance level | Low | High | Near-zero |
| Mixed-fuel capability | Partial | Difficult | Yes |
Two engineering consequences matter most. The 450 °C rating exceeds the roughly 400 °C practical ceiling of a conventional ESP, which opens applications — cement, lime, high-temperature abrasive dust — where an ESP requires gas conditioning first. And with no moving parts in the separation stage, there is no rotating element or wear liner to schedule against the crush season.
No other commercially available product integrates both mechanisms in a single vessel at this scale.
Electrocyclone technology, specifications and applications
What we engineer, manufacture and service
Air pollution control
Electrostatic precipitators for biomass, coal and industrial flue gas — new systems, capacity and emission upgrades, collecting plates, discharge electrodes, transformer-rectifier sets and controllers, MIGI rapper systems, gas-distribution screens, casing and hopper rebuilds.
Boiler modernisation and pressure parts
Performance diagnosis, combustion optimisation, fuel-conversion engineering, capacity and efficiency upgrades. ASME and JIS certified pressure parts — water walls, superheaters, economisers, reheaters, headers, fin-tubes. Soot blowers, deaerators, PRDS and boiler auxiliaries.
Flue-gas and auxiliary systems
Bag filters, multicyclones, wet scrubbers, flue-gas ducting, ID/FD/SA fans, dry and wet ash handling, and gas-distribution modifications engineered to the measured flow field rather than to a standard drawing.
Turnkey execution and lifecycle service
Plant inspection and technical assessment, engineering and design, manufacture and supply, site erection, commissioning, troubleshooting, shutdown planning and execution, emergency repair, spare parts and long-term modernisation programmes.
Our responsibility does not end at delivery. We stay involved until the system is integrated with the plant and holding its performance figure.
Demonstrated performance
170 t/h biomass boiler, Thailand
Gen-1 commercial Electrocyclone unit. Outlet PM below 30 mg/Nm³ at 7% O₂, dry basis, verified in continuous operation on mixed agro-residue — bagasse, rice husk, palm shell and cassava — the fuel variability that defeats fixed-design equipment.
250 t/h biomass boiler, Thailand
Expanded Gen-2 design for higher dust loading and capacity. Largest unit of its type in Thailand.
230 t/h boiler, Colombia
First international Electrocyclone export. Tropical multi-fuel conditions, validating the technology for Latin American operating regimes.
Current Electrocyclone fleet: 3 units · 650 t/h combined boiler capacity · 2 continents.
Boiler re-engineering
A 45-year-old boiler returned to modern efficiency standards from incomplete original documentation — reverse-engineered from as-found dimensional survey and operating data, avoiding both full replacement cost and the outage duration replacement would have required.
Combustion-side particulate reduction
Our Air Wicks and Air Comb combustion optimisation reduces upstream particulate generation by 20–30%, lowering the duty on downstream pollution control before a single collecting plate is specified. Treating the combustion side first is usually cheaper than enlarging the ESP.
Every performance commitment is developed for the specific application and depends on the agreed design basis, fuel, operating conditions, measurement method and contractual scope.
Standards and certifications
- ISO 9001:2015 — Quality management system, certified by TÜV Rheinland
- ASME (United States) · JIS (Japan) — Pressure-part fabrication
- Compliance engineering to EU IED 2024, Thai PCD and Indian CPCB emission norms
- Full material test certificates, manufacturing data records and inspection packages
- 100% material traceability · third-party inspection available
Industries we serve
Led by engineers. Accountable in the field.
Pavan Rajput — Founder, CEO and Managing Director
Reviews the technical basis and the commercial terms of every proposal personally before it reaches a customer. Arrow Energy does not issue a quotation without a completed technical assessment behind it.
“Plant owners are not short of suppliers. They are short of engineers who will read the operating data before proposing something. That is the whole business.”
Orawan Chuadmee — Executive Director
Operational execution, manufacturing quality and project delivery across the group.
Supported by an engineering team across R&D, design, manufacturing, projects and service. Our culture is hands-on: investigate the root cause, challenge the conventional solution, and stay accountable for performance after handover. Zero lost-time incidents to date.
Why customers choose Arrow Energy
One accountable partner
Engineering, manufacturing, installation, commissioning and service coordinated through one organisation — not assembled from three vendors who each blame the other.
Existing-plant expertise
We specialise in bringing existing ESPs and boilers to specification rather than defaulting to replacement.
Manufacturing control
ASME and JIS certified fabrication in our own facility gives direct control over technical changes, quality, lead times and critical spare parts.
Proprietary technology
Electrocyclone is not available from any other supplier. Where a conventional cyclone-plus-ESP arrangement cannot meet the outlet figure within the available footprint, it is frequently the only route.
Americas access
Arrow Energy USA LLC provides commercial ownership and engineering response in your region and time zone, backed by the group’s manufacturing capacity.
Lifecycle economics
We evaluate power consumption, pressure loss, fuel use, maintenance requirement, availability and shutdown risk — not only the purchase price.
Mission and vision
Mission — To engineer and deliver pollution control and thermal equipment that measurably lowers emissions, raises efficiency and improves plant availability, with every performance figure supported by a validated design basis.
Vision — To be the engineering partner heavy industry turns to when the standard solution has not worked — recognised for technical depth, proprietary technology and manufacturing control rather than for catalogue supply.
Turn your plant data into an engineered solution
Send us your operating data — fuel analysis, gas volume and temperature, inlet dust loading, current outlet emissions, existing equipment drawings, and the constraint you are working against. We will review it and identify the appropriate next technical step. You will get an engineering assessment, not a brochure.
Frequently asked questions
Is Arrow Energy a US company or a Thai company?
Both. Arrow Energy is a US–Thai engineering group. Arrow Energy USA LLC, in Lewisville, North Carolina, is the Americas headquarters and holds commercial ownership for North and Latin America. Arrow Energy Co., Ltd., in Bangkok and Samut Sakhon, Thailand, holds group engineering, R&D and manufacturing. Note that Arrow Energy is not affiliated with the Australian coal-seam-gas producer of the same name.
Where does Arrow Energy manufacture its equipment?
At its own facility in Samut Sakhon, Thailand, under ASME and JIS pressure-part certification. The plant fabricates ESP casings, collecting plates, discharge electrodes, gas-distribution systems and hoppers, along with water walls, superheaters, economisers, reheaters, headers and fin-tubes. Manufacturing is in-house, not subcontracted.
What is Electrocyclone and how does it differ from a conventional ESP?
Electrocyclone is Arrow Energy’s proprietary particulate separator — the first commercially available product to integrate centrifugal and electrostatic collection in a single vessel. Stage 1 removes 80–90% of the inlet load centrifugally; stage 2 charges and collects the remaining fine fraction on grounded plates inside the same vessel. Combined efficiency is 99.9% with outlet PM below 30 mg/Nm³ at 7% O₂, dry basis. It operates to 450 °C against roughly 400 °C for a conventional ESP, requires near-zero maintenance with no moving parts in the separation stage, and eliminates the separate cyclone-plus-ESP arrangement. Pressure drop is 800–1,500 Pa and it handles inlet dust concentrations up to 50 g/Nm³ across a particle size range of 0.01–100 µm.
Which countries does Arrow Energy serve?
Regional presence covers the United States and Canada in North America; Brazil, Colombia, Mexico and Guatemala in Latin America; and Thailand, Indonesia, India and the Philippines in Asia, with company offices in Thailand, the United States, Indonesia, India, Colombia and the Philippines.
Can Arrow Energy upgrade an existing ESP rather than replace it?
In most cases, yes — retrofit is a core specialism. Common paths are collecting-plate and electrode replacement, rapping-system correction, gas-distribution redesign, transformer-rectifier and control upgrades, and field additions within the existing casing. The decision follows the design-basis assessment: if the existing installation can be brought to the required outlet emission within the available footprint and pressure drop, a retrofit is both cheaper and faster than replacement.
Is Arrow Energy an equipment manufacturer or an engineering company?
Both, and the combination is the point. Equipment is designed and manufactured in-house at Samut Sakhon, while engineering covers plant assessment, design basis development, retrofit design, commissioning, troubleshooting and lifecycle service. One organisation carries the design basis through to field performance.