①High Heat Value: the higher the chemical fiber content, the higher the calorific value, pure polyester calorific value of 5500 calories (equivalent to lignite), blended easily over 4000 calories;

②Clean Composition: fewer impurities, single composition, pre-treatment difficulty is three grades lower than that of domestic waste;

Waste RDF alternative fuel preparation technology: Four steps from “Waste Heap” to “New Fuel” 

Step 1：Intelligent Screening - The Quality Inspector for RDF Alternative Fuels

The skillful combination of various screening equipments: wind shifter, magnetic separation, and power screen accurately screen out metals, heavy substances and other impurities.

It improves the stability of combustion in the kiln, and provide a solid guarantee for the high-quality development of cement production.

Step 2: Fine crushing——Harden Shredder’s “delicate cutter shaft”

Its characteristics of speed control at will, no matter under the low, medium and high speed control, and precise shredding of all kinds of waste textiles.

Blade Anti-tangling: Alloy knife specializes in treating clothes tangling, extending the life by 3 times;

Fine Discharging: Unique design of sieve mesh strictly control the discharging size, 50mm uniform particles, calorific value stability increased by 30%.

Step 3: Precise Formulation - RDF's “Nutritional Diet”

Calorific value mixing: Some RDF preparation plants have tested the method of “improving the stability of calorific value of RDF alternative fuels” by mixing chemical fiber shredded material + waste wood chips in proportion to the calorific value of about 4,500 kcal, which reduces the volatility of combustion in the kiln.

Chlorine purification: Most cement kilns come with a chlorine ion purification system, which reduces dioxin by 90% and zeroes out environmental risks.

Step 4: Intelligent Combustion - the “decomposition stomach”

The prepared RDF alternative fuels are typically transported through a step feeder and belt to the pre-heater platform, metered and weighed, then through a screw conveyor and locking air valve to the decomposition furnace, thus replacing traditional fossil fuels.

Intelligent control, by mixing waste textile RDF alternative fuels in proportion and at regular intervals, and by adjusting the RDF acceleration rate in real time by the kiln temperature AI control system.

Some cement kilns have reached the goal of replacing 50% of coal without affecting the quality of clinker.

Who is stealing the RDF track?

In the field of how to prepare solid waste into high calorific value RDF alternative fuels, Harden Machinery Ltd., which has been deeply engaged in the solid waste treatment industry for more than ten years, has gained the recognition of our customers.

The core of RDF alternative fuel preparation technology, according to Harden Shredder, is“fine crushing and precise screening”.

Based on the precise grasp of the demand for alternative fuels to be fed into kilns in cement kilns and other application scenarios, Harden has pioneered the core concept of “Just Shred It, Thus Sort It”. 

We have successfully launched the Waste Textile RDF Preparation System (pictured below), which provides a more efficient and precise solution for the waste textile solid waste treatment industry.