Ce Approved Reasonable Complete Log Pellet Production Line

Definition of log pellet line

Using logs as raw materials, formed by solidifying and extruding into high-density pellet fuel through pretreatment and processing. It can save energy and reduce emissions, will make good economic and social benefits. It can be widely used in biomass power plants, biomass steam boilers, household fireplaces, drying stove and biomass gasifier, etc, is an efficient and clean renewable energy source.

Raw Material

Wood logs,sawdust,wood chips,waste wood,straw,wheat straw,rice husk,cotton stalk,coconut slag, sunflower stalk, olive slag, grassy, bamboo,, paper, cassava, EFB, peanut shell ,corn cob, soybean stalk, weed, wood branches, leaves and so on.

Introduction of log pellet line flow diagram

After debarking the branches and trunks of logs, the logs are cut into small chips by the chipper. The size of the chips is 20-30mm and the thickness is about 3mm, then be finegrinded into sawdust of 3-4mm by the hammer mill; next the raw material with 40% moisture is dried to about 15% through a three-layers drum dryer; finally is pelleted, the diameter of finished pellets is 6-10mm for choosing. After pelleting and cooling, it is packed into 20-50kg/ bag by small bag packing scale for convenient transportation and sale. The capacity of log pellet complete project is 6 tons of biomass pellets, the total power of whole line equipment is about 1250 kw, and the plant covers an area of 3000 m2, including raw material storage and finished product storage. The whole line's design is compact, the structure is reasonable, meets the requirements of environmental protection, and can be directed designed according to customers' requirements.

Flow Diagram

Flow process of log pellet complete project 

Debarking Process---Chipping Process--Grinding Process--Drying Process--Pelleting Process--Cooling&Bagging Process

1. Debarking Process

Raw material debarking can improve heat value of finished pellets, reduce ash residue after combustion of finished pellets and reduce emissions. The main equipment used in the debarking process of log pellet complete project is the debarker. The roller and reducer motor adopt direct connection mode, running smoothly, and it is convenient for installation and maintenance. The belt conveyor is equipped at the bottom to collect and output bark efficiently.The debarking knife array is arranged in a spiral type, and the debarking efficiency is higher.

Debarking Machine: LYMB-1200, length is12m, power is 30kw, disigned capacity is 10tons per hour.

2. Chipping Process

The chipping process of the log pellet complete project is to process the wood logs into wood chips, the size is 20-30mm, the thickness is about 3mm, and then enter the processing of the following sections. The feeding system of the chipper is divided into two parts: feeding and pressing. The feeding system is automatically controlled by the hydraulic system. The feeding system is smooth, and can return the material automatically when under load, ensuring that the machine does not block the material.

Chipping Machine: Chipper LYGX218D,  power of main motor is 132kw, feeding roller is 4kw, oil pump is 0.55kw, designed capacity is 38m³.

3. Grinding Process

The grinding process of the log pellet complete project is composed of several auxiliary equipment such as cyclone, bag filter and so on,without dust discharge during the grinding process. After grinding by hammer mill, the sawdust is pneumatic transported out of the fan by negative pressure suction, the size of the sawdust discharged is generally about 3-4mm.The hammer mill is of tear circle structure with high grinding efficiency.The rotor can be operated in a positive and negative way to increase the service life of the hammer blade.The hammer mill adopts the direct transmission of motor, with high transmission efficiency and convenient maintenance.

4. Drying Process

The drying process of the log pellet complete project is equipped with the three- layers drum dryer, is special for sawdust, adopts the three-way return, covering a small area, with high drying efficiency and low heat loss. The heat exchange rate in the dryer is over 90%, and the heat supply of the dryer provides automatic feeding for the equipment, without labor, reducing the customer's labor cost. After drying, the moisture of sawdust is about 13-18%.

5. Pelleting Process

6 units of biomass pellet mill MZLH420 biomass are designed in the pelleting process.The diameter of biomass pellets is 6-10mm, and the biomass pellets have the characteristics of high calorific value, no pollution and low ash content, which can be widely used in biomass power plants, biomass steam boilers, household fireplaces, drying stove and biomass gasifier.The log pellet complete project has obvious advantages in the pelleting process: the pellet mill is equipped with a forced feeder, and the material is forced into the ring moulding chamber, which can make the pellet mill operate smoothly, do not block the material, and produce efficiently. Specially designed broken arch screw feeder, make the bad fluidity material smooth feeding.

6. Cooling & Bagging Process

The cooling process of the log pellet complete project use cooler to reduce the pellets temperature and decrease pellets moisture, low energy consumption, easy operation, high level of automation, after cooling through the cooler, the pellets temperature generally is not higher than room temperature 5ºC, the moisture is about 8-10%, the density of pellets is 650-750 kg/m³.

Packing scale: according to the local sales demand of the customer, choose the suitable packing scale to facilitate the customer to sell products. There are usually two specifications: small bag and ton bag. The packing specification of small bag packaging scale is 20-50kg/ bag, and the ton bag scale is 500-1000kg/ bag. The packing scale has high level of automation, high packing accuracy, and the weighing system is a sensor measurement with high sensitivity and strong anti-interference ability.

Applications of biomass pellets

Biomass pellets are widely applied in industries like industrial boilers, home fireplace and biomass power generation and so on. Biomass pellet has gradually replaced industrial fuels like electricity, oil, gas and coal, and so on.

All our export products are firstly soft packing, like wrapping in the film and then packed in the iron pallet or iron case, according to the condition, which is very suitable for the sea shipping. And packing list for each container or shipping mark is on each small packing unit, which is convinient for customers checking the goods.

1.How does your factory do regarding quality control?
Our factory has gained CE, ISO9001, SGS authentication.'Quality is priority'. We always pay great attention on quality controlling from the beginning to the end. 
2.How long is your guarantee?
One year. After this period we will definitely support you when needed. You are welcome to contact us at any time.
3.Will you send engineers to install the plant? 
Yes, we can send our engineers do the guide installation overseas.
4.Where is your company located? How can I get there? 
Our company is located in Nanjing City, Jiangsu Province, China, near Shanghai. 
If you arrived Nanjing Lukou International Airport, you can come to our company by Car about 30 Mins. Or you arrive Shanghai Hongqiao Airport, you can by train about 1.5H.
5. Where is your factory located? How can I visit there? 
Our factory is located in Liyang City, Jiangsu Province, China, near Shanghai; and our International Business Centre is in Nanjing City. You can fly to Shanghai airport or Nanjing Airport directly. All our clients, from home or abroad, are warmly welcome to visit us!

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