Dry Purification Incinerator – MWI Series

How the Dry Purification Incinerator Works

The MWI series uses gasification incineration with four functional chambers. Flue gas is burned and cleaned inside the unit, so most projects do not need a separate wet scrubbing system.

Stage	Chamber	Function
1	Primary (gasification) chamber	Gasification technology raises the furnace temperature gradually from 200°C to 800°C, preventing bridging, slagging and sintering
2	Mixed combustion chamber	Flue gas enters tangentially; a secondary burner and circumferential air supply ensure full mixing with air
3	Secondary combustion chamber	Flue gas residence time of more than 2 seconds, maximum temperature up to 1200°C
4	Purification chamber	Ca(OH)₂ filter bricks neutralise and adsorb acidic gases before discharge

Furnace Wall and Door

• Layered wall: steel plate → insulation wool → insulating brick → refractory brick, keeping the outer wall below 50°C.
• Door lining: ceramic fibre modules or refractory cement; large furnaces use lighter ceramic fibre modules for easier opening.
• Controls: electrical control box as standard; PLC intelligent touchscreen cabinet available.

Standard Models

Model	Capacity	Typical use
MWI-WJ	Paper documents and archives	Confidential document destruction – see document incinerator
MWI-20	10–20 kg per batch	Township clinics, vaccination centres, small labs
MWI-30 to MWI-200	Up to 200 kg per batch, one blower	Hospitals, health centres, general solid waste
MWI-300 to MWI-750	Up to 750 kg per batch, two blowers	Large hospitals, pharmaceutical plants

MWI Series Technical Parameters

Model	Capacity	Dimensions (mm)	Chamber volume (m³) gasification / secondary / mixing	Fan	Chimney	Primary burner	Secondary burner	Voltage	Weight (kg)	Door (mm)
MWI-20	10–20 kg per batch	1600×1200×1700	0.2 / 0.14 / 0.02	0.25 kW	6 m, Ø280	0.11 kW, 4–6 kg/h	0.11 kW, 6–10 kg/h	220V 50/60Hz	~1,600	380×480
MWI-30	20–30 kg per batch	1700×1250×2500	0.4 / 0.2 / 0.03	0.37 kW	6 m, Ø280	0.11 kW, 4–6 kg/h	0.11 kW, 6–10 kg/h	220V 50/60Hz	~2,500	480×600
MWI-50	30–50 kg per batch	1800×1300×3000	0.6 / 0.3 / 0.04	0.55 kW	10 m, Ø330	0.11 kW, 6–10 kg/h	0.18 kW, 7–14 kg/h	220V/50Hz or 380V/50Hz	~4,600	600×800
MWI-100	80–100 kg/batch	2000×1400×3300	1.2 / 0.6 / 0.06	0.75 kW	10 m, Ø330	0.11 kW, 6–10 kg/h	0.18 kW, 7–14 kg/h	220V/50Hz	~6,500	700×900
MWI-150	100–150 kg/batch	2200×1500×3500	1.5 / 0.7 / 0.1	0.75 kW	10 m, Ø360	0.11 kW, 6–10 kg/h	0.18 kW, 10–20 kg/h	220V/50Hz	~7,500	800×1000
MWI-200	150–200 kg/batch	2300×1600×3500	2.0 / 0.9 / 0.12	0.75 kW	10 m, Ø360	0.11 kW, 7–10 kg/h	0.18 kW, 15–20 kg/h	220V/50Hz or 380V 50/60Hz	~8,500	850×1050
MWI-300	200–300 kg/batch	2400×1600×3800	2.4 / 1.2 / 0.16	2 × 550 W	10 m, Ø400	0.18 kW, 10–20 kg/h	0.25 kW, 15–25 kg/h	220V/50Hz or 380V/50Hz	~9,000	900×1100
MWI-500	400–500 kg/batch	3000×2000×4800	4.0 / 1.5 / 0.3	2 × 750 W	12 m, Ø460	0.18 kW, 10–20 kg/h	0.37 kW, 15–30 kg/h	220V/50Hz or 380V/50Hz	~14,000	1000×1200

Burner fuel consumption figures are estimates and depend on waste type and operation.

Optional Configurations

Option	Description
CX-01 Small mobile type	MWI-20 compact incinerator on a small trolley for assisted movement
CX-02 Automatic feeding device	Conveyor feeding for assisted loading
CX-03 Containerized mobile type	Medium-size incinerator integrated into a customised container

Need stricter emission control? See the wet purification incinerator with venturi scrubber or multi-stage flue gas treatment. For custom furnace designs, see custom incinerators.

FAQ

What is a dry purification incinerator?

An incinerator that cleans flue gas without water: a high-temperature secondary chamber destroys organics and a purification chamber with Ca(OH)₂ filter bricks neutralises acidic gases.

What temperature does the secondary chamber reach?

Up to 1200°C, with a flue gas residence time of more than 2 seconds.

Is the outside of the incinerator hot?

The layered wall keeps the outer wall temperature below 50°C.

When do I need a wet purification system instead?

When local emission limits are strict, the waste contains a lot of chlorine, or the site is close to homes. Tell us your emission standard and we will recommend the right configuration.

8 Things Buyers Check – and Our Answers

Government buyers, NGOs and hospitals check the same eight points before they order. Here is how our MWI series answers each one.

What buyers check	Our answer
1. Emission compliance	Gasification pyrolysis plus high-temperature secondary combustion, flue gas residence ≥ 2 s and low dioxin emission. Third-party emission test reports available on request.
2. Capacity and waste types	From 10–20 kg per batch (MWI-20) to 500 kg per batch (up to MWI-750). Infectious, pathological and sharps waste.
3. Combustion technology	Gasification, multi-point air supply and secondary combustion; secondary chamber residence ≥ 2 s, up to 1200°C.
4. Flue gas treatment	Dry or wet purification; quench tower, activated carbon and bag filter configurations matched to your emission standard.
5. Automation and safety	PLC intelligent touchscreen control cabinet with temperature interlocks – simple, safe operation.
6. Turnkey service	Installation and commissioning, trial run, operation manual and operation & maintenance training; 24-hour after-sales support.
7. Certificates and documents	ISO 9001 and CE certified; 40+ national patents; High-Tech Enterprise. Compliance documents and third-party emission test reports provided for tenders.
8. Running cost and spare parts	Low fuel and gas consumption design; fuel-oil or gas-fired versions; long-term supply of refractory, burners and thermocouples.

Recent Medical Waste Deliveries

Country	Application	Model	Delivered
Philippines	Medical waste	SMWI-100	Feb 2023
Kuwait	Medical waste	SMWI-100	Oct 2022
DR Congo	Medical waste	SMWI-100	May 2022
Zambia	Medical waste	SMWI-500	Mar 2019
China	Medical waste	SMWI-50	Aug 2024

Projects in 20+ countries. See more on our projects page.