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Stacked Chicken Manure Air Drying Equipment--Chicken Manure Drying Equipment
1. Equipment Overview
The chicken manure air drying equipment is a customized low-temperature negative-pressure heat-free manure treatment device specially designed for large-scale layer and broiler farms. Different from traditional rotary high-temperature dryers and simple solid-liquid separators, this equipment adopts a multi-layer sealed mesh belt negative-pressure cross-flow air drying process, utilizing waste residual heat from chicken house ventilation and natural fresh air. It requires no additional heat sources including coal, natural gas or electric auxiliary heating, and realizes continuous dehydration and deodorization of fresh chicken manure on-site.
Raw material initial state: Fresh chicken manure with a moisture content of 75%-80%, featuring high viscosity, strong odor, poor storage and transportation performance, and failure to meet environmental protection standards.
Finished product state after drying: Dried chicken manure with a moisture content of 20%-30%, loose texture without viscosity and greatly reduced odor. It can be directly used as organic fertilizer raw material, farmland base fertilizer and pond aquaculture fertilizer. The equipment supports on-site resource utilization of farm manure and meets the environmental protection requirements of planting-breeding combination and zero discharge.
2. Core Working Principle
This equipment applies the sealed negative-pressure counter-current air drying principle with an internal drying temperature controlled at 35-55℃ throughout the low-temperature drying process. Waste hot air exhausted from chicken houses serves as the drying medium, and multiple groups of frequency conversion induced draft fans form a negative-pressure air duct. Hot air penetrates the manure materials on each layer from top to bottom to take away free moisture inside chicken manure. Equipped with an intelligent fresh air adjustment system, the machine can automatically switch among three air modes including upward air, downward air and circulating dehumidification air according to ambient temperature and humidity, adapting to all weather conditions and preventing efficiency reduction in low-temperature and rainy days.
Operating under fully sealed negative pressure, the equipment prevents odor and dust leakage, and avoids external rainwater and moisture entering the drying chamber. Its dehydration stability is far superior to open-air sun drying.
3. Complete Technological Process (6 Working Procedures, Full-automatic Unmanned Operation)
Procedure 1: Automatic Feeding and Material Homogenizing
Fresh wet chicken manure collected by chicken house manure scrapers is delivered to the top feeding port of the drying equipment through a sealed screw conveyor. A material stirring and homogenizing device evenly spreads viscous chicken manure on the first layer of mesh belt with consistent material thickness, eliminating local material accumulation and uneven drying. The whole feeding process is sealed with no odor diffusion.
Procedure 2: Reciprocating Conveying via Multi-layer Mesh Belt
The equipment is equipped with 3-7 layers of stainless steel mesh belts for layered material conveying. Chicken manure falls and turns over layer by layer from top to bottom. Each falling process breaks up caked manure and destroys hardened material layers, enabling hot air to penetrate the inside of materials. Compared with single-layer drying equipment, the dehydration efficiency is improved by more than 40%.
Procedure 3: Negative-pressure Low-temperature Cross-flow Dehydration (Core Procedure)
Under the action of negative-pressure fans, residual hot air from chicken houses vertically penetrates manure material layers to continuously remove internal moisture. The intelligent control system monitors real-time temperature and humidity inside the chamber, and automatically adjusts fan speed and air damper opening. Upward air mode is adopted for rapid moisture removal in hot weather, while internal circulating dehumidification mode is activated in cold and rainy days to ensure stable dehydration effect independent of external weather conditions.
Procedure 4: Centralized Treatment of Exhaust Gas and Dust
Moisture, fine dust and ammonia gas generated during drying are collected into the tail gas treatment system uniformly. After spray deodorization and dust removal purification, exhaust gas is discharged up to standard, with an ammonia removal rate of no less than 70%. It completely solves the problem of odor nuisance from farm manure and meets all environmental assessment inspection requirements.
Procedure 5: Automatic Discharging of Finished Products
After 24 to 48 hours of continuous low-temperature drying, qualified dried chicken manure with standard moisture content is automatically discharged from the equipment bottom. The finished product presents loose granular state without adhesion and mildew, requiring no secondary sun drying.
Procedure 6: Finished Product Storage or Direct Transportation
Dried chicken manure can be delivered to sealed storage bins or directly loaded for sales. The equipment covers a small floor area with no need for large-scale sun drying sites.
4. Reference Core Equipment Parameters
Item |
Parameter Index |
Inlet Moisture Content |
75%-80% |
Outlet Moisture Content |
20%-30% (adjustable on demand) |
Drying Cycle |
24-48h |
Heat Source Mode |
No additional heat source, reuse of chicken house waste heat |
Power Consumption per Ton of Manure |
≤80 kWh/ton |
Odor Removal Rate |
≥70% |
Operation Mode |
24h full-automatic unmanned operation |
5. Core Selling Points (5 Dimensions for Sales Promotion and Bidding Documents)
1. Extreme Energy Saving: No Auxiliary Heat Source, Ultra-low Operating Cost (Core Selling Point)
• Driven completely by waste hot air from chicken house ventilation, no extra heat sources such as natural gas, coal, biomass fuel and electric heating are required, eliminating high fuel costs of traditional high-temperature dryers;
• Only fans and conveying motors consume electricity, with power cost controlled at USD10-12 per ton of chicken manure. The overall operating cost is reduced by more than 70% compared with rotary high-temperature dryers;
• The equipment recycles waste heat from chicken houses and optimizes indoor ventilation environment simultaneously, achieving dual benefits.
2. Low-temperature Drying Process: High Fertilizer Retention, No Loss of Nutritional Value
• Stable low-temperature drying at 35-55℃ throughout the process, different from high-temperature drying above 150℃. It completely retains nitrogen, phosphorus, potassium and organic matters in chicken manure without material burning and nitrogen volatilization caused by high temperature;
• Dried chicken manure with complete nutrients has higher market value than high-temperature dried manure products;
• No auxiliary materials like straw and sawdust are needed for moisture adjustment, supporting direct processing of pure chicken manure and cutting auxiliary material procurement costs.
3. Sealed Negative-pressure Environmental Protection: Eliminate Odor Nuisance and Pass Environmental Assessment Easily
• Full sealed structure and negative-pressure operation avoid odor and dust leakage fundamentally, solving farm odor problems at the source;
• Integrated spray deodorization system ensures exhaust gas meets discharge standards, with qualified removal efficiency of ammonia and hydrogen sulfide, complying with local environmental inspection regulations;
• Open-air sun drying is no longer required, free from occupation of large land and influence of rainy and snowy weather. No secondary pollution is generated, fully conforming to national livestock manure resource utilization policies.
4. Full-automatic Intelligent Operation: Labor-saving and 24-hour Unmanned Operation
• One-click start-stop design equipped with PLC intelligent electronic control system, supporting automatic temperature & humidity control, air volume adjustment and fault alarm;
• Full automatic operation covering feeding, drying, material turning and discharging. Only one worker is required for regular daily inspection without full-time on-duty personnel;
• Compatible with existing farm manure scraping systems to realize closed-loop assembly line operation including manure collection, drying and finished product discharging.
5. Fast Return on Investment & Wide Application: Improve Farm Economic Benefits Directly
• Dried chicken manure can be sold stably as organic fertilizer raw material, garden base fertilizer and pond aquaculture fertilizer;
• Manure volume reduction rate exceeds 60%, greatly cutting manure transportation and third-party manure disposal fees;
• Adopts anti-corrosive stainless steel structure with simple mechanical design, service life up to 8-10 years and extremely low maintenance cost with few vulnerable parts;
• Modular design requires minimal civil engineering work with short installation cycle. Customized models are available for chicken farms ranging from 30,000 to 1,000,000 chickens.
6. Advantage Comparison with Traditional Manure Treatment Equipment (Pain Point Targeting)
Equipment Type |
Negative-pressure Chicken Manure Air Dryer |
Rotary High-temperature Dryer |
Ordinary Solid-liquid Separator |
Heat Source Consumption |
No extra heat source, ultra-low power consumption |
Fuel required, high operating cost |
No heat source, poor dehydration effect |
Outlet Moisture Content |
20%-30%, ready for direct sales |
10%-20%, severe nutrient loss |
45%-55%, still damp and odorous |
Odor Control |
Sealed deodorization, no leakage |
Massive high-temperature exhaust gas, serious odor emission |
Open operation, serious odor diffusion |
Nutrient Retention |
Complete retention of organic matters |
Massive nitrogen volatilization |
Average nutrient retention performance |
Applicable Scenarios |
Suitable for large, medium and small chicken farms |
Only applicable for large organic fertilizer plants |
7. Applicable Scenarios
1. On-site manure treatment for large-scale layer and broiler breeding farms;
2. Planting-breeding integrated farms for on-site manure returning to farmland;
3. Pretreatment of raw materials for organic fertilizer production, replacing traditional sun drying yards;
4. Breeding parks with strict environmental supervision, banned open-air sun drying and stringent odor emission standards.
8. Summary
The negative-pressure chicken manure air drying equipment features five core advantages: heat-free operation, low running cost, complete nutrient retention, sealed environmental protection and full-automatic operation. It solves five major pain points of chicken farms including severe manure odor, difficult storage and transportation, high manure transfer cost, difficult environmental assessment approval and large land occupation for sun drying. Balancing environmental compliance and breeding economic benefits, it is the most cost-effective solution for harmless and resource-oriented treatment of livestock manure.
9. Operation & Maintenance Notes
9.1 Pre-operation Inspection
• Check all mesh belts, fans and air dampers before startup to ensure no foreign matters block the air duct and conveying system;
• Verify the tightness of all sealed doors and connecting pipelines to prevent odor and hot air leakage during operation;
• Confirm the normal operation of PLC control system, temperature and humidity sensors, and exhaust gas treatment device.
9.2 Daily Operating Precautions
• Forbid overloading feeding; keep uniform manure thickness on mesh belts to avoid incomplete drying caused by local thick material accumulation;
• Do not cut off the power supply forcibly during continuous operation; stop feeding first and shut down the equipment after all materials are fully dried and discharged;
• Do not open the sealed access door randomly during running, so as not to damage the internal negative pressure balance and affect drying efficiency.
9.3 Regular Maintenance Requirements
• Clean dust and residual manure on mesh belts and fan impellers every 7 days to guarantee smooth air circulation;
• Check the lubricating oil of driving motors every 30 days, and replace vulnerable wearing parts regularly according to operating frequency;
• Clean the circulating water tank and packing inside the spray deodorization tower every 15 days to ensure stable deodorization effect;
• Conduct a full-system overhaul once every half a year to check pipeline aging and air duct sealing performance.
9.4 Special Weather Adaptation Tips
• In high temperature and high humidity seasons: keep the outer exhaust fan running at full speed to accelerate moisture discharge;
• In cold winter or rainy days: turn on internal circulating dehumidification mode, reduce fresh air intake properly to guarantee stable drying temperature inside the chamber;
• In thunderstorm weather: cut off the main power supply in advance to avoid circuit damage caused by lightning strike.
9.5 Safety Cautions
• Only professional operators are allowed to debug the electric control system; non-prohibited personnel shall not touch electrical components;
• No fire source is allowed near the equipment operating area, though the machine adopts low-temperature drying without high-temperature fire risk;
• Cut off total power supply completely before all maintenance and cleaning work to avoid mechanical injury accidents.
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