Wood hammer mill is endowed with many advantages compared to other kind of crushers such as large reduction rate, high production capacity, even crushed effects, low energy consumption and simple structure, etc. It can be used to crush hard, soft and weakly corrosive materials. After crushing, raw materials are uniform and with proper moisture content to meet further processing.

The design of the water drop hammer mill is inspired by the shape of water droplets. This design allows the machine to have a large surface area during operation, thereby increasing the frequency and force of impact between the hammer and the material, and achieving a crushing effect. At the same time, the water drop hammer mill adopts a direct drive mode, which makes the power transmission direct and reduces energy loss.

In addition, the water drop hammer mill also has a reasonable hammer screen gap. By adjusting the gap, users can perform coarse and fine crushing according to actual needs to meet different production requirements. The crushing chamber adopts secondary strike technology, so that the material is more fully crushed during the crushing process, and the finished product has a finer and more uniform particle size. In addition, the machine is also equipped with a self-iron removal device, which effectively avoids the damage caused by iron impurities to the equipment and improves the stability and service life of the equipment.

During operation, the water drop hammer mill uses high-quality bearings, which makes the machine run at a low temperature and reduces equipment failures caused by high temperature. The screen adopts a staggered hole design, which makes the discharge smooth and improves production efficiency. At the same time, the machine is also equipped with a quick-start door opening mechanism and an elastic screen pressing mechanism, which makes operation and maintenance simple and reduces maintenance costs.

Hammer mill can grind wood chips, small branches, bamboo shavings, straw, stalk, and many other biomass wastes into 3-5mm long, so that such materials can be fed into the pellet mills for pelletizing,

Biomass pellet fuel production: Hammer mill is used to convert various biomass waste into pellets suitable for biomass pellet fuel production. It can crush raw materials such as wood chips, straw, peanut shells, corn cobs into the required particle size, providing suitable materials for subsequent processing by biomass pellet machine.

Biomass feed production: Hammer mill can be used to crush soft biomass raw materials such as straw, cellulose waste, etc. into pellets suitable for animal feed. These pellets can improve the digestibility and nutritional value of feed.

1. A set of crusher includes crusher mainframe, fan, Shakeron, air shutoff, double-axis feed screw, bag dust collector, etc…
2. The main component of the crusher, the rotor, is dynamically balanced before assembly to ensure the stability of the machine during operation.
3. The base assembly platform of the crusher motor and the rotor main shaft bearing seat assembly platform are processed synchronously by large CNC machine tools at one time to ensure horizontal accuracy, thereby ensuring the smooth operation of the machine.
4. The hammer of the crusher’s vulnerable parts is made of manganese steel, of which two corners are welded with wear-resistant alloy materials, which increases the service life of the hammer and reduces costs.
5. The operating doors on both sides of the crusher can be opened horizontally for easy maintenance and replacement of the screen.
6. The crusher screen consists of two to six pieces. After installation, the overall discharge angle is close to 360 degrees, the discharge area is large, and the production efficiency is high.
7. The crusher can be equipped with two shakers according to customer requirements. This installation method allows the dust-containing gas to be filtered through the secondary shaker, discharged through the air lock, and then input into the raw material bin through the conveying screw, and enter the bag dust collector to make the filtration more complete.

Hammer mills are widely used in various industries for grinding and crushing different materials. They operate on the principle of impact, where the rotor rotates at high speed and the hammers attached to it strike the material, causing it to be crushed into smaller particles. The crushed material then passes through a screen or grates at the bottom of the machine, allowing the desired particle size to pass through.

Hammer mills are composed of various beating rollers that rotate at high speed in the grinding chamber. Raw materials are usually fed from the feed port and then immediately fall into the crushing chamber, where they are crushed and compressed by the beatings. Due to the speed and number of agitators, the material can be crushed into fine powder in a short time. You can adjust the gap between the baler and the screen to get sawdust of different sizes.

(1) Material properties

The moisture content of the material plays a vital role in the crushing effect. The higher the moisture content and fiber content of the material, the greater its toughness, which makes the material very easy to undergo plastic deformation during the crushing process and difficult to crush, resulting in a significant decrease in crushing efficiency, increased energy consumption, and increased production costs. In addition, the higher the moisture content of the material, the greater the humidity during crushing, which makes it very easy for the material to adhere to the surface of the screen during the crushing process, causing the screen holes to be blocked, thereby greatly reducing the screen hole discharge rate, and reducing productivity and output.

(2) Hammer

As one of the important parts of the crusher, the hammer is often damaged by wear and tear. Its size, shape, arrangement and rotation speed will have a certain impact on its crushing efficiency.

(3) Screen

As a device for discharging materials in the crusher, the screen plays a vital role in the crushing performance. According to the installation position of the screen in the crushing chamber, it can be divided into bottom screen, ring screen and side screen. Although the side screen has a long service life, it is not easy to replace the screen. Since the screen surface of the ring screen can occupy an area of ​​more than 3/4 of the circumference of the inner chamber and the screening area is large, the production efficiency can be effectively improved and it is widely used. The screen can not only adjust the degree of material crushing by screening the material, but also rub against the material group to further grind the material. Therefore, the shape, aperture, opening rate and other parameter requirements of the screen will affect the working performance of the crusher.

(4) Shape and width of the crushing chamber

When the crusher is running, the rapid rotation of the hammer rotor drives the material to circulate, generating a material-air circulation layer. Therefore, changing the shape of the crushing chamber cavity is the most direct way to destroy the material-air circulation layer. At present, the shape of the crushing chamber has expanded from circular to teardrop-shaped, elliptical, vortex-shaped, eccentric, etc., which can effectively destroy the material-air circulation layer to a certain extent and improve the working efficiency of the crusher. The width of the crushing chamber cavity directly affects the effective impact of the hammer and the material and the screening rate of the material particles. If the width of the crushing chamber is too small, the effective screening area will be reduced, the screening rate will be reduced, and the productivity will be reduced; if the width of the crushing chamber is too large, the number of effective collisions between the hammer and the material will be reduced, resulting in a decrease in crushing performance. At present, the width of the crushing chamber in the hammer crusher is basically distributed between 50 and 300 mm.

(5) Ventilation volume

Related studies have shown that moderate ventilation volume helps materials pass through the sieve holes, which is beneficial to the increase of electricity output and productivity, and the improvement of crushing performance. However, the ventilation volume of the crusher should not be too large or too fast. Too much material entering the crushing chamber will weaken the crushing effect, and excessive ventilation volume will take away most of the moisture in the material, and it is also easy to cause the motor to overheat; if the ventilation volume is too low, the material-air circulation layer cannot be destroyed.