The Drop Tube Furnace (DTF) is a special type of tubular furnace primarily used to study and simulate the rapid pyrolysis, combustion, and gasification of fuels (such as coal, biomass, and waste) at high temperatures. Its core feature is that fuel particles fall freely through a vertical heating tube, completing the reaction within an extremely short residence time. This design is particularly suitable for studying reaction kinetics at high temperatures and within short periods of time.

I. Operating Principle

The Drop Tube Furnace (DTF) consists of a high-temperature heating furnace body, vertical tubes, a fuel feed system, a gas flow control system, and sampling and exhaust systems.

The operating process is as follows:

Fuel Feeding

Fuel (powder or pellets) is uniformly fed into the top of the tubes via a screw feeder or pneumatic conveying system.

Particle Fall and Heating

The fuel falls freely along the vertical tubes under the influence of gravity.

Heating elements on the outside of the tubes generate high temperatures (typically 1000–1600°C), rapidly heating the particles through radiation and convection.

Fast Reaction

The residence time is typically 0.5–5 seconds, simulating the actual reaction time in an industrial burner or gasifier.

Product Collection and Analysis

Gaseous products enter a sampling and analysis system (e.g., gas chromatography (GC) or mass spectrometry (MS)) through the bottom outlet.

Solid residue is collected by a bottom collector for ash analysis, carbon conversion determination, and other purposes.

II. Structural Components

Furnace: Constructed of high-temperature insulating material and a metal shell, with a high-temperature furnace tube mounted vertically inside.

Heating System: Typically utilizes silicon carbide (SiC) or molybdenum disilicide (MoSi₂) heating elements, capable of temperatures up to 1600°C.

Furnace Tube: Typically quartz or corundum tube, with a diameter of 40–100 mm and a length of 1–2 m.

Feed System: Includes a fuel hopper, screw conveyor, and pneumatic conveying device.

Atmosphere Control: Air, oxygen, nitrogen, carbon dioxide, or mixed gases can be introduced to simulate combustion, gasification, inert atmospheres, and other conditions.

Sampling System: Equipped with high-speed valves, coolers, filters, and other components for precise capture of gaseous or solid samples.

III. Main Features

Short residence time (milliseconds to seconds) → Suitable for studying fast reaction mechanisms

Uniform and controllable temperature → Simulates high-temperature environments such as industrial boilers and gas turbines

Flexible atmosphere → Supports experiments such as combustion, gasification, pyrolysis, and oxidation

Low sample volume → Only a few grams of fuel required per experiment

Suitable for kinetic and mechanistic studies → Precise control of temperature, atmosphere, and residence time

IV. Applications

Coal combustion and gasification research

Biomass pyrolysis and combustion kinetics

High-temperature treatment of waste (plastics, rubber, etc.)

Catalytic combustion or gasification reaction testing

Ash fusion characteristics and deposition research

Drop Tube Furnace Technical Parameters

Model	YXV-1200-V1
Furnace tube specifications	50*42*500mm(outer diameter*inner diameter*length)with 5-10micron sand core layer in the middle
Operating voltage	Single-phase AC220V,50/60Hz
Heating element	High-quality HRE heating wire
Operating temperature	Maximum temperature:1200℃(≤30min)Long-term working temperature:1100℃ Recommended heating rate:5-20℃/min
Heating zone	Heating zone length:220mm Constant temperature zone length:60mm(±3℃)
Maximum power	1.5KW

Drop Tube Furnace Video

在线留言

Online Message