Compost material screw conveyor

Monday March-24 2025  15:26:14

Compost material screw conveyor is a kind of equipment specially used for conveying compost raw materials or finished compost (such as kitchen waste, animal feces, crop straw, etc.), which is widely used in agriculture, waste treatment and organic fertilizer production. In the compost production process, the screw conveyor can effectively convey and mix materials, improve the uniformity and efficiency of compost fermentation.

Working principle of compost material screw conveyor

Compost material screw conveyor mainly relies on the rotating spiral blades to push the material forward, and is usually composed of a drive device, a spiral shaft, a spiral blade, a conveying pipe (or trough), a bracket and other parts.

①Horizontal conveying: suitable for short-distance material conveying, such as conveying from a compost fermentation tank to the next processing equipment.

②Inclined conveying: can be used to convey materials to a higher position, such as from the ground to a fermentation tank.

③Vertical conveying: suitable for scenes with limited space and used when the lifting height is large.

Compost materials suitable for compost material screw conveyor

Material type	Features
Kitchen waste	Need strong anti-corrosion ability to avoid clogging
Livestock and poultry manure	The material has a high moisture content and needs to be designed with anti-adhesion
Agricultural straw	Large volume, can be used with crushing device
Sludge	High moisture material, needs to be sealed for transportation to prevent leakage
Garden waste	Need to be crushed before transportation to avoid machine jam

What are the disadvantages of compost material screw conveyors?

1. Not suitable for oversized particles or foreign matter: If large stones, wood blocks or other foreign matter are mixed in the compost material, it is easy to get the screw stuck or damage the blades. Compost material screw conveyor needs to add screening or crushing before feeding, which increases the initial processing cost.

2. Material residue and cleaning difficulty: Although the closed design reduces leakage, it is difficult to completely remove the residual material inside, especially wet and sticky materials. Compost material screw conveyor may breed bacteria or produce odors, affecting hygiene, especially in food-grade composting processing.

3. Material restrictions: Compost material screw conveyor has certain requirements for the shape, size and humidity of the material. For materials that are too wet, too sticky or contain large impurities, blockage is likely to occur, affecting the conveying efficiency.

4. Limited conveying distance: The effective conveying distance of the compost material screw conveyor is usually no more than 20-30 meters. The ultra-long distance needs to be segmented or relayed, which increases the complexity and cost of the equipment and is not suitable for ultra-long distance material handling.

Technical parameters of compost material screw conveyor

Parameter name	typical value / range	parameter name	typical value / range
Conveying capacity	0.5-20 tons / hour	pipe diameter / slot width	89mm-580mm
Conveying length	1-20 meters	inclination angle	0°-45°
Screw diameter	80mm-500mm	speed	20-150 rpm
Motor power	1.5kW-15kW	voltage	380V/50Hz (customizable)
Material	stainless steel 304/316 or carbon steel	blade thickness	3mm-10mm
Conveying speed	0.5-2 meters / second	weight	200kg - 2000kg
Working temperature	-20°C to 60°C	noise level	≤75 dB

Application of compost material screw conveyor

Raw material transportation: transport compost raw materials (such as feces, straw) from the storage area to the fermentation tank or mixing equipment.

Finished product handling: transport the fermented compost to the packaging machine or storage bin.

Fermentation tank extraction: extract compost materials from the bottom of the fermentation tank in anaerobic or aerobic fermentation systems.

Automated production: cooperate with other equipment in the composting production line (such as compost turner, screening machine) to achieve continuous operation.

Application examples

Scenario	conveying capacity	pipe diameter	length	power	material
Small composting site	1 ton/hour	159mm	5 meters	2.2kW	stainless steel 304
Large organic fertilizer production line	15 tons/hour	400mm	15 meters	11kW	stainless steel 316
Sludge composting	5 tons/hour	315mm	10 meters	5.5kW	carbon steel

Compost material screw conveyor is an indispensable equipment in the composting process, with the characteristics of high efficiency, stability and strong adaptability. When selecting and using, it is necessary to make a reasonable design according to the material characteristics, conveying requirements and site conditions, and regularly maintain it to extend the service life of the equipment.