Briquetting presses: process, advantages and applicability in sawdust recycling

Briquetting presses have attracted growing interest in recent years thanks to their ability to turn bulky materials into compact, dense ones through pressing.

What are briquetting presses and how do they work?

Briquetting presses are equipment used to convert powdery or granular materials, especially fine and dry materials, into compact, cylindrical briquettes compressed under high pressure. The briquetting process involves pressing materials, such as wood chips, cork, nut shells, plastics, rubber, natural or synthetic fibers, polyurethane, or other organic and inorganic substances, into compact cylinders or balls, which are easier to handle, transport, and store.

Definition and working principle of briquetting press

Briquetting machines work by compressing bulk materials into compact, dense briquettes. The process involves several steps, and the specific mechanism may vary depending on the type of briquetting machine and the material being processed. 

The main components and design of a briquetting press

The design of a briquetting press is designed in such a way that it can accommodate the material to be processed in a vat of different sizes depending on the capacity of the presses. Apart from its dimensions, it does not require additional space on site, the pressing operation being carried out within the dimensional space of the machine. 

The main components of a briquetting press are: 

1. Loading the material is carried out manually, semi-automatically or automatically in the loading hopper, which directs the material towards the compression chamber
2. Compression chamber is the main component of a briquetting press, it is responsible for the actual briquetting process. Inside the chamber we find a mold that will determine the size of the briquettes. At the same time, the compression chamber has the role of supporting the pressure generated as a result of the pressing process. 
3. Mechanical or hydraulic press It applies pressure that compacts the loose material, causing the bulky mass to stick together, thus taking the shape of the mold. The pressure applied is usually high to ensure effective compaction.
4. The shedding mechanism It is activated when it is necessary for the formed lighter to exit the mold. This may be a piston or other mechanism that allows the lighter to be ejected from the machine. 
5. Cooling and solidification it can be done manually or can be facilitated by an additional cooling mechanism integrated into the machine. 
6. Collection and storage it is carried out manually by the operator or in the storage spaces provided with the briquetting press.

The process of turning sawdust into briquettes

The transformation process follows a simple principle. That of compacting the targeted material, to the point where from a loose mass we have a solid, compact mass. Exactly like when we gather sawdust in raffia bags and beat them against the ground to make room. 

The process consists of: 

• collection and preparation of the targeted material
• mixing and adding agglutinants (optional)
• feeding into the briquetting machine
• compression and formation of briquettes
• cooling and solidification
• collection and packaging
• storage, use or sale

Advantages of using briquetting press in sawdust recycling

Volume reduction – briquetting presses compress materials, significantly reducing their volume. The result is more efficient use of storage space, as well as easier handling and transport.

Material conservation – by compacting materials, presses help conserve natural resources. For example, biomass briquetting ensures efficient use of agricultural or forestry residues, turning them into valuable energy sources.

Energy efficiency – briquetting presses usually require less electricity than other methods of compacting waste. This advantage improves energy efficiency and also helps reduce environmental impact.

Waste utilization – it ensures a sensible use of various types of materials, such as wood residues, plastic and others. Instead of being landfilled, they can be converted into useful, marketable products.

Improved transport and handling – it is obvious that a quantity of compacted material cannot be compared in weight with a loose one, which gives the advantage of transporting and handling a greater weight of material.

Reduced carbon footprint – briquetting supports waste management by reducing the impact of certain materials. For example, converting sawdust into briquettes to heat a workshop can be a more sustainable alternative to disposing of the waste.

Cost efficiency – briquetting can optimize waste handling and storage costs, offering a financially efficient fuel alternative, especially in industries where briquettes can replace coal.

Economic opportunities – producing and selling briquettes can create business opportunities and growth for the local community. It can also lead to the development of new market sectors centered on briquette production.

Customization – the briquetting operation offers flexibility in terms of the materials that can be processed and the shapes and sizes that can be produced. Their adaptability makes them suitable for a variety of applications.

Applications and uses of produced lighters

Mainly wood briquettes are used for domestic (heating) or industrial (heat supply) use.

How to choose the right briquetting press for your needs?

Briquetting presses, like all machines, are chosen based on the size of the workshop, factory, etc. Even though we encourage customers to purchase machines that will accommodate future production growth, these forecasts must be calculated realistically. There are different sizes and production capacities for different activities. 

To provide a conclusive answer, the choice of press is made based on the following characteristics:

• type of feeding (manual, semi-automatic or automatic)
• type of pressing (electric, hydraulic, mechanical)
• production capacity
• the quality of the briquettes produced

Factors to consider: capacity, size, cost

The processing capacity is closely related to the amount of material you have access to. It is obvious that a large amount of material requires a larger press. The calculated quantity must be able to be sustained for a long time, in order to be able to amortize the cost of the press and why not, to be able to market the additional briquettes. 

Differences between briquetting press models

There are many models of briquetting presses, but we will focus on two models: cylindrical presses and funnel presses. 

Cylindrical ones are intended for small and medium workshops that do not necessarily want the option of marketing, wanting to reuse the resulting materials in daily processes. 

Hopper presses are suitable for large workshops or factories, as they can be placed under silos, industrial exhaust systems, etc., with the hopper loading being done automatically. 

Maintenance and durability: maximizing the life of your press

Continuous maintenance and verification of the parameters specified by the manufacturer considerably increase the life of the presses. Abuse or overuse, due to the desire to produce more, will in the long term lead to partial or permanent failure of the equipment. 

Frequently asked questions about briquetting presses and sawdust recycling

There are many frequently asked questions by customers. Many of them have been answered above in the article. If we had to choose the 3 most important ones, they would be: 

How profitable is the investment in a briquetting press?

Any investment is profitable if it is put to work. Briquetting presses become profitable if they produce, and to produce you need raw material, in this case sawdust or other waste specified by the manufacturer. For this reason, when we discuss such a machine with a client, we want to make sure that they can produce or buy enough raw material so that the press can be used to its true capacity.

What types of sawdust can be used in the briquetting process?

Wood sawdust, wood chips, shavings, MDF or chipboard sawdust, etc. In principle, waste resulting from activities in the furniture industry can be used as raw material for briquetting presses, with the caveat that the technical manual should be checked to see if they require certain binders or combinations of materials to produce quality, usable briquettes. 

How do lighters compare to other forms of fuel?

Briquettes are usually more compact and easier to store, offer a more even and longer burning time, and burn cleaner and produce less ash than some types of charcoal. 

Compared to pellets, briquettes have the advantage of being produced on a small scale, being used in a wider range of heating sources: stoves, fireplaces, boilers, etc. 

Conclusions

Briquetting presses are machines that offer multiple advantages, both financial and sustainability or business. If you are interested in a plan for a briquette production line, contact us and we will provide you with additional details.