With world developing, biomass has become a main source of energy in our daily life. As a result, many people have seized the opportunity of making straw, wood chips, bamboo shavings, etc. with a biomass pellet mill for sale into renewable cylindrical pellets to use in power generation, heating and cooking.

However, many users cannot use the biomass pellet mill properly, even cause damages to the pellet mills. In consequence, the service life of biomass pellet mill is decreased, and it cannot reach its standard productivity and efficiency. So, to lengthen the lifespan of biomass pellet mill, it’s vital to maintain it regularly.

Some tips for correctly utilizing the biomass pellet mills:

• Carefully read the Instruction Manual to be familiar with the performance, structure and operation method of the machine. Then install and adjust it according to the Instruction Manual.
• Make sure no impurities in the raw material to prevent damage to the machine.
• When the biomass pellet mill is in operation, DON’T put hands into transmitting section and pelletizing chamber.
• If the biomass pellet mill needs maintain or check, remember to cut off the electricity to guarantee safety.
• The motor must be grounded to avoid accidents.

Lubrication

• The roller and main shaft should be lubricated with lithium-based lubricant twice per shift.
• The gear box part needs to use hypoid gear oil for lubrication. Pay attention to add oil to required limit. Then lubricate the biomass pellet mill every six months.

Roller and die	Screws

How to maintain

• Regularly check the screws in all parts. If there is looseness, tighten it in time.
• The electrical part should keep away from water, moisture, corrosion and rodent. Make sure the electric cabinet and terminals are clean to avoid electrical faults.
• Frequently check if flat die and roller wear.

Cleaning

• Regularly clear residues inside the biomass pellet mill to prevent blockage.
• Regularly clear the dust inside the electric motor to avoid electrical faults like short circuit or poor contact.
• The scattered materials should be cleaned up timely to keep the machine clean, so as to prolong its service life.

As long as you keep these tips in mind while using the biomass pellet mill, it will scarely appear faults and can be used as long as possible. So maintaining your biomass pellet mill is extremely important.

1. Get ready your wood material. It could be any form, no matter sawdust or wood log. If your raw material is sawdust, it can be directly used to make pellets; if you have wood logs, wood pieces or the like, crush them first. When the raw material wood is crushed into powder form, add some water into it and mix until the moisture content of mixture is about 8-12% (If your raw material is too wet, you need to dry it to the required moisture content). To test the moisture, a moisture meter is a good help.
2. Then put your wood powder into the pellet machine. When the wood powder goes into the pellet pressing chamber, it is pressed by the rotating roller (ZLSP R type small wood pellet mill or BPM series large ring die pellet mill) or rotating die type (ZLSP D type) and forced to go through the round holes in the die. Then pellets go out and cut by a cutter to have uniform length. The ZLSP R type small wood pellet mill or BPM series large ring die pellet mill perform better in making various wood pellets. Remember not to touch the newly made wood pellets, since they have high temperature.
3. Cool the wood pellets. If you are home user and do not make too many pellets, just pour them on a flat surface and they will cool down and get dry. If you are industrial producer, a cooler is necessary. Also, other auxiliary equipments can also contribute to wood pellets making.

For different raw materials or requirements, the process of making wood pellets will be slightly different. But don’t worry, GEMCO will give you a great help on your wood pellets making.

In choosing wood pellet machine, people are often confused by how to buy quality and cheap wood pellet machine, and whether to choose ring die pellet mill or flat die type? Here GEMCO would tell you how to purchase an efficient small wood pellet mill.

Wood pellet machine, as the name suggests, is to press the wood sawdust into pellets. However, the features of wood sawdust are poor adhesiveness, light density, hard formability. As a matter of fact, wood pellet machines were developed from feed pellet machines. Some companies even took the feed pellet machine to make wood pellets. The result is that their pellet machines cannot make good wood pellets.

Different from other manufacturers in China, GEMCO has developed advantageous small wood pellet mill for sale with high pressure. The compression ratio is obtained from over 100 times of tests to be most suitable for wood sawdust. The wood pellets made by our machines have high density, smooth surface and regular length. We have pellet mills both for hardwood and softwood sawdust.

For choosing a small wood pellet mill, there are other facts you should take into consideration, such as capacity, auxiliary equipments, spare parts, etc. If you are still not sure about how to choose, GEMCO will give you best suggestion.

• The gear box is made of high quality grey cast iron to have low noise and good shock absorption.
• The gear drive has greater efficiency than belt drive and worm drive, and can avoid the belt slippage, short belt service life and other shortcomings in belt drive.
• It changed the structure of traditional wood pellet mills design, added strengthening rib to the shell and increased the thickness of the casting, which greatly enhances the strength of the machine, and prevents breakage of the wood pellet machines shell.
• The die and rollers are made of high quality alloy steel, whose hardness can be 55-60HRC.
• The most suitable wood sawdust processing hole structure. The best compression ratio is acquired from countless experiments.
• It adopts safe electric control system and operating systems that are fully compliant with CE standard. The emergency stop button can quickly shut down the machine in case of emergency.
• The strict and standardized production and technology managements make sure all of our machines and each part to be consistent and interchangeable. Customers will be more relieved to choose the spare parts.

How to maintain the wood pellet mill for sale?

1. Regularly check if the belt is slack, and tighten or repair timely.
2. Put the wood pellet mill in a better ventilate place to ensure that the heat from the working motor can be emitted, so as to extend the life of the machinery.
3. Before repeated starting, first clear away all the remaining debris in the machine chamber to reduce starting resistance; remove the ash in the bottom outlet.
4. Regularly fill oil to bearings to ensure inter- lubricating of bearings.
5. in order to ensure the sharpness of cutters, check them frequently to prevent unnecessary damage to other parts.
6. Regularly check cutter screws, strengthen fixity between the blade and the blade rest.
7. The machine should be kept well grounded. Frequent maintenance can increase the life of the wood pellet mill machinery.

Then, what are the factors that affect the yield of wood pellet mill equipments?

1. The quality of die and roller is a key element that influences productivity. The roller and die are hearts of wood pellet mill equipment, so their quality is crucial to wood pellets production. The original components or those meet quality standard are strongly recommended to use. Before using new roller and die, grind them fully and carefully for about 30-60 minutes with a mixture of bran, sand and engine oil of certain proportion. Then can put into production. Remember to keep a proper gap between the roller and die: too large will cause low yield and loose pellet density, while too small will cause abrasion to the roller and die, which will ultimately shorten their service life. During utilization, adding some oil will also increase productivity and reduce abrasion. When finished production, add some mixture of bran and edible oil into the pellet machine and press for 1-2 minutes, make sure the mixture has filled all die holes, so that the machine can be put into production directly next time. What’s more, keep an eye on the roller and die. If damage occurs, replace in time.
2. The unreasonable configuration of automation degree, construction and mechanical property. Small scale equipments can be fed by human and the output be naturally dried. But large wood pellet plants must be collocated properly, including pulvering, mixing, deironing, mechanical conveying, and pelletizing, cooling, dedusting systems. Low voltage, low vapor pressure, imbanlance moisture ratio, and many other problems will result in insufficient yield.
3. The most important is to choose the equipment that suit you best.

Knowing the factors that affect the yield of wood pellet mill equipments can help you correctly operate the equipments and get the best yield. If you are looking for a wood pellet mill line, contact us at any time!

The one that performs extremely well in pressing wood pellets is rotating roller type wood pellet mill. It has the following advantages:

1. It can produce better wood pellets with a density of 1.1*10³kg/m³, smooth surface as well as durability. So the wood pellets can meet storage and transportation requirements.
2. The initiative motion of roller is good for the pressing of raw materials and driving the material to move, which promotes material mixing.
3. The large diameter roller shaft can bear the counter-acting force of hard wood, so it is more suitable for hardwood pellet processing.
4. The low forming speed reduces its sensitiveness to materials, so it has better adaptability to different raw materials.
5. The die compression ratio is designed according to specific raw materials. We have made over hundreds of tests for different materials, and have got the most suitable compression ratio.
6. The service life of a single wood pellet mill die is 600h.
7. The die has smooth surface and the holes are arranged evenly. (Those made by other manufacturers have rough surface and unevenly die holes.) After days of usage, the die can even be as shiny as a mirror.

Even though die is the main part of wood pellet mill, it is still a consumable part. So, when purchasing wood pellet mill, it is strongly advisory to buy some dies and rollers, in case they break after months’ utilization. And of course, you can consult us for most professional advice.

1. Feed the raw biomass material steadily. Unsteady feed of raw material will cause sound.
2. Check if the spinning scraper is worn and replace new scraper blades in time. Otherwise may cause unsteady feed and generate noise.
3. If the wood pellet making machine is equipped with a new ring die but an old roller or vice versa, it may cause noise. The best is to use both new ring die and roller, and adjust the interval between these two parts.
4. Adjust the composition of raw material and strictly keep its moisture content of 15% to 18%. Otherwise will not make out good pellets.
5. Check if the steam line, system pressure and reducing valve are normal. Otherwise the steam supply will lack pressure.
6. Check if there are impurities inside the pelletizing chamber. If yes, clear them away in time.
7. After used for a long time, the main shaft bearing must have worn. So it should be replaced by a new one.

Above are some possible causes of noise in wood pellet making machine. Hope they will help you in using pellet machine.

Steps to make pellets:

1. Prepare raw materials. For making pellets, raw materials can be any kind of biomass, including sawdust, wood shavings, waste wood, leaves, stalks, straw, etc. Since the pelleting process require raw material to be smaller than 5mm, those raw materials larger than this size need to be pulverized by hammer mill or wood crusher. In addition, if the moisture content of raw material is too high (>15%), it need to be dried; if lower than 8%, it need to be added some water and stir evenly.
2. Feed the raw material into the pellet machine. In this process, the raw material must be fed steadily into the pellet machine hopper, in case of blockages. When the roller or the die inside the pelletizing chamber rotates and press the material, it will generate high temperature (over 70 centigrade). The high temperature will cause the lignin contained in biomass to soften and be adhesive. Then together with the high pressure, the pellets are pressed tightly to go through the die holes. Then biomass pellets are formed. There is a pellet cutter to cut the pellets to a certain length.
3. Cool the pellets. The biomass pellets just made out have high temperature, in this case, they must be cooled to room temperature to be used or packed.
4. And finally, you can enjoy the biomass pellets.

Having learnt about how to make pellets, you may have found it is such an easy task. And surely it is. Although you will spend some money purchasing the pellet making machine, but considering it will be used for several years to make fuel pellets from costless biomass, you will find it worthwhile!

In fact, it is quite easy to choose homemade wood pellet machine from a reliable supplier.

GEMCO manufactures the best homemade wood pellet machines. Compared with the equipments from other manufacturers, GEMCO homemade wood pellet machine has the following advantages:

1. The die: the die of wood pellet machine is processed by specialized equipment to have a roughness of only 3.2. Those made by other manufacturers often have a roughness of 12.5. Other accessories are processed by CNC equipment to be precise.
2. Compression ratio of die: the technical data for die holes is gotten after hundreds times of trial and error to be precise and can bring best result for specific raw material.

3. The electrical components: the electrical components of GEMCO homemade wood pellet machine adopt world-famous brand CHINT and SIEMENS. The electric control cabinet is processed by phosphating, pickling and coating to be safer and more durable. On the electrical box, there is also an Emergency Stop (other manufacturers do not have) to prevent the equipment from being damaged by blockage. There are also English (or other languages) signs to be clear to see. The circuit is arranged according to CE Standards. What’s more, the electric control cabinet also has heat radiation structure that other manufacturers do not have.

4. The die and main shaft of homemade wood pellet machine adopt 40Cr to be more wear-resistant. These two parts and roller, roller shaft are all treated by vacuum heat treatment to have great hardness, wear-resistance and service life.

There are many other advantages for GEMCO homemade wood pellet machines, all contribute to the excellent performance of wood pellets production. If you want to know more, please don’t hesitate to contact us!

The first factor to consider is your capacity.
The capacity of our flat die pellet mills is 50-400kg/h, while that of ring die pellet mill is 1-2t/h. So if you need a small production capacity, the flat die pellet mills is ideal for your wood pellets production. If you need larger capacity of 1-2t/h, you can choose ring die pellet mills, or a combination of several sets of flat die pellet mills. For capacity larger than 2t/h, you might probably choose ring die pellet mills.

pto pellet mill flat die	sawdust flat die pellet milll	gasoline pellet mill flat die
ring die pellet mill bpm25	ring die pellet mill bpm35	ring die pellet mill bpm42

The second thing to think about is your budget.
The price of flat die pellet mills is several thousand dollars; while the price of ring die pellet mills is ten times of flat die ones. So if you want a capacity of around 1t/h and not enough budgets, you can choose 2 or more sets of flat die pellet mills; if you have sufficient budget, you can choose 1 set of ring die pellet mill. However, if you need continual wood pellets production, we recommend you the ring die pellet mills, since they can work 24hours a day without break. Also, ring die pellet mills are more energy-saving than flat die pellet mills, so the energy consumption should also be considered when purchasing pellet mills.

The third you should think over is your workshop size.
Flat die pellet mills occupy small space, and their auxiliary equipments as hammer mill, dryer and cooler also need small space. However, ring die pellet mills are larger, and their auxiliary machineries are also large, as a result ring die pellet mill plant needs much larger workshop. So you need to make decision depending on your workshop size.

In short, whether to choose the flat die pellet mills or ring die pellet mills for wood pellets production depend on your own situation. No matter which one you choose, it is a wise decision.