How the Nepal Energy Company Converts Biomass Into Fuel Pellets?

Date: 03/09/2021 08:42:45 From: wood-pellet-plant.com Clicks:

Biomass pellets can be a clean and cheap energy source, and an alternative to firewood, petroleum products, LPG and coal — all of which are unsustainable and harmful to health. The forest floor is full of dried leaves, mills throw away sawdust, and farms burn away agriculture residue. Now, a Nepali company has decided not to let waste go waste and turn this biomass into fuel pellets.

Biomass pellets

Bakas Renewable Energy is planning to produce nearly 20,000 metric tonnes of biomass pellets every year for the Nepali market from its plant in Province 2, and help reduce Nepal’s petroleum import bill and improve public health by reducing air pollution. This week, Bakas signed a loan agreement with NMB Bank for debt financing of Rs160 million. Bakas was founded by Nepali forestry and environmental professionals who believe in a sustainable energy future for the country.

Most of the raw material for production are sourced from the forest floor of Sagarnath Forest Development Project based on the agreement with Forest Products Development Board. Dried undergrowth is inflammable and one of the reasons for forest fires in the Tarai. More than 80% of Nepalis still depend on biomass for energy, much of it goes waste. The rest of the raw material is farm residue, saw dust and agriculture waste. Bakas says collection and processing of the raw material will create jobs for local communities, mostly women and disadvantaged groups. The pellets are marketed and sold to brick kilns, cement and other industries that need energy for heating or cooling.

Bakas is the first company to produce biomass pellets on an industrial scale in Nepal, and it says the green fuel that is easy to store and handle, and is a proven technology globally for domestic heating, electricity generation and outdoor heating.

How to Make Biomass Pellets?

(1) Chipping: Use a chipper to cut the straw, branch materials, and large pieces that cannot be directly crushed into small pieces.

(2) Crushing: The agricultural and forestry waste is crushed by a sfsp wood hammer mill crusher to make the particle size less than 5mm. This process generates dust and equipment operating noise. The pulverizer is only equipped with a feed port and a discharge port. The feed port is closed after feeding to reduce dust escape. The discharge port is connected to a Double-Cyclone dust collector. The Double-Cyclone dust collector uses the principle of centrifugal force to separate scrap and crush The material is deposited in the dust collector and discharged through the material port. The gas is discharged from the Shakelong dust collector and then processed by the bag dust collector. All the collected dust is recycled to the production line.

wood hammer mill crusher

(3) Drying: Some raw materials that account for 30% of the total have a moisture content of 55% (the data provided by the owner is between 50% and 60%, and this environmental assessment takes 55%), which does not meet the requirements of granulation Claim. These raw materials with excessive moisture content need to be dried to make the moisture content meet the granulation requirements (the moisture content is less than 13%), and the moisture content of the raw materials after drying is about 10%. The dryer of this project is equipped with a biomass burner, and the fuel is biomass pellets produced by the project. This process produces dust, combustion exhaust gas, noise, and ash.

(4) Conveying and feeding: the raw materials are sucked into the feed port of the granulator through the feeding screw, this process generates dust and noise.

(5) Granulation: the raw materials are fed into the biomass pellet mill machine through the feeding auger, and the finished product is formed by extrusion molding. The extrusion process is a physical process without any adhesive and no chemical reaction occurs, except for the feeding auger connection The equipment is sealed at and outside the discharge port. This process mainly produces noise and high-temperature dust-containing waste gas;

biomass pellet mill machine

(6) Lifting and conveying cooling: The pelletized biomass particles are naturally cooled by conveying, so that their temperature can reach the conditions of packaging and storage, and finally conveyed to the finished product warehouse. This process generates dust and noise.

(7) Packing: The compressed hot particles pass through the screening at the end of the conveyor belt, and the qualified biomass particles fall into the finished product warehouse. The bottom of the finished product warehouse is a funnel-shaped discharge port. The finished product can be directly dropped into the packaging bag. After the machine is packaged, it can be stacked for sale. After molding, the biomass particles have been compacted and dense, and there is basically no dust during the bagging process. The unqualified products are discharged and collected and then returned to the granulation process.

Germany 2-2.5 Tons/hour CE ISO Approved Good Quality Wood Sawdust Pellet Processing Line Project

Name: Wood Sawdust Pellet Processing Line

Country: Germany

Capacity: 2-2.5 Tons/hour

Date: 2020

Installation cycle: 60 Days

Pellet Size: 6-8 mm

Raw materials: softwood (90%) and hardwood (10%)

Final products: Wood pellets

Total power:426.18 KW

Wood pellet plant cost:around 250,000USD

Wood pellet Production process: Crushing → Mixing → Pelletizing → Cooling → Elevating → Packing

The remarkable feature of this latest technology high quality wood pellet plant 2-2.5 Tons/hour capacity is that it adopts material mixing process, which realizes the stability of raw material entering pelletizing chamber and guarantees the continuous and stable running of equipments. Compared to those pelletzing equipments made in USA or Germany, our wood pelletizing machines can endure a high material moisture content of 13-15%, so that customer can greatly lower the energy input in drying process, thus decreasing production cost.

Besides, the electric circuit of this wood pellet plant strictly obeyed Germany electric standard. The 2-2.5 t/h CE ISO approved good quality wood sawdust pellet processing line was also equipped with emergency stop system and independent power switch for every single piece of equipment to assure operating safety.

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