Compound fertilizer vinrate screener Introduction

Tongli fertilizer rotary screener, also known as a rotary sieve or trommel screen, is a mechanical device used in the fertilizer production line to separate and classify granular materials based on their size. It consists of a cylindrical drum that rotates on an inclined axis. The drum is perforated with a series of holes or slots of varying sizes with ss304 screen mesh. The primary purpose of a fertilizer rotary screener is to separate larger particles from smaller ones, ensuring that the fertilizer product is of consistent particle size and quality. In our Tongli fertilizer production plant, there are three types of trommel screen, we have coarse screener, fine screener, and finished product screener, qualified material is passed to the next step and unqualified material will return to the first step for re-processing.

Compound fertilizer trommel screen structure

Frame: The frame provides the overall structure and support for the machine. It's usually made of steel or other sturdy materials to handle the vibrations and loads during operation.

Vibrating Motor: The vibrating motor is the power source that generates the vibrations necessary for the screening process. It's usually an electric motor connected to an eccentric weight or an unbalanced mass, which causes the screen to vibrate.

Screen Surface: The screen surface is the actual screening element of the machine. It's made of a perforated or meshed material that allows particles of certain sizes to pass through while preventing larger or smaller particles from getting through. The size and shape of the openings in the screen determine the particle size separation.

Screen Deck(s): Fertilizer vibrating screeners often have multiple screen decks stacked on top of each other. Each deck has its own screen surface with different-sized openings. As the fertilizer material moves along the screen, the particles are separated into different size fractions on each deck.

Support Springs or Suspensions: These components are used to attach the screen decks to the main frame while allowing them to vibrate freely. The springs or suspensions absorb the dynamic forces generated by the vibrating motor and help isolate vibrations from the frame.

Feed Hopper: The feed hopper is where the raw fertilizer material is introduced onto the vibrating screener. It ensures a controlled and even distribution of material across the screen surface.

Discharge Chutes: Discharge chutes or outlets are positioned at the bottom of each screen deck to collect and channel the separated fertilizer fractions into different collection points.

Adjustment Mechanisms: Many fertilizer vibrating screeners offer ways to adjust the vibration intensity, the tilt angle of the screen decks, and other parameters to optimize the screening process for different materials and particle sizes.

Motor Mount and Drive System: The motor mount holds the vibrating motor in place, and the drive system transfers the motor's rotational motion to the screen's vibrational motion. This can be achieved through belts, pulleys, or direct connections.

Design principles of compound fertilizer vibrate sieve 

Vibration Mechanism: The primary principle of a vibrating screener is to generate vibrations that cause the material to move along the screen's surface. This is typically achieved using an electric motor with an eccentric weight mounted on it. The rotation of the eccentric weight creates a centrifugal force that induces vibration.

Screening Surface: The screen itself is a critical design element. It's usually made of multiple layers of woven wire mesh, perforated metal, or other suitable materials. The choice of material and the size of the openings in the screen determine the efficiency of particle separation.

Vibration Characteristics: The amplitude (the distance the screen moves from its resting position) and frequency (the number of vibrations per unit of time) of the vibrations are important design factors. The combination of amplitude and frequency influences how particles behave on the screen. Higher amplitudes and frequencies are often used for coarse materials, while finer materials require gentler vibrations.

Inclination Angle: The angle at which the screen is inclined also affects material movement. An appropriate angle helps to facilitate the flow of material down the screen while ensuring efficient separation.

Feed Rate: The rate at which material is fed onto the vibrating screener influences its performance. If the feed rate is too high, material may not have sufficient time to pass through the screen openings. If the feed rate is too low, the screen might not be effectively utilized.

Screening Deck Configuration: Vibrating screeners can have single or multiple decks, each with different screen openings. Multiple decks allow for materials to be sorted into different sizes in a single pass.

Drive System and Power: The drive system, usually an electric motor, should provide enough power to generate the necessary vibration. The motor's speed, horsepower, and torque are selected based on the application requirements.

Material Properties: The physical properties of the materials being screened, such as particle size distribution, moisture content, density, and shape, play a role in the design. These properties affect how materials flow on the screen.

Specifications of compound fertilizer vibrate screener

Note: *Capacity may vary based on specific media.

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Industry Knowledge extension

What is the jey equipment in fertilizer production?

 (Reference: "What are the key equipment used in fertilizer production?" https://npk-fertilizer.com/news/industry-news-68.html)

What is the difference between rotary screener and vibrate screener?

Rotary Screener: A rotary screener, also referred to as a rotary sieve or trommel screen, operates by rotating a cylindrical drum. As material is fed into the drum, the rotation causes smaller particles to fall through the screen holes, while larger particles are carried along the length of the drum and eventually discharged at the other end.Rotary screeners are often used for larger, bulkier materials and applications where the material tends to be more difficult to screen due to its size and shape. They are also commonly used in situations where the material contains a mix of different sizes and where a higher throughput is required. In a rotary screener, the material moves through the drum due to the rotation of the cylinder. This action allows the larger particles to move along the length of the drum while the smaller particles pass through the screen holes. Rotary screeners have a more complex design due to the rotating drum and the need for mechanisms to facilitate the rotation. Maintenance and repair can be more involved compared to vibrating screeners. Rotary screeners are often used when higher throughput is required, making them suitable for applications with larger quantities of material to process.

Vibrating Screener: A vibrating screener, also known as a vibratory screener or vibrating sieve, operates by using vibration to move and separate particles. The screen surface is set into motion by a vibrating motor or an eccentric weight system, causing the material to move across the screen and be separated into different size fractions based on particle size. Vibrating screeners are commonly used for fine to coarse screening of dry bulk materials. They are particularly effective for separating particles that have a tendency to stick together, clump, or become static due to their vibrating motion. In a vibrating screener, particles move primarily due to the vibration of the screen surface. This motion helps to stratify the material and ensure efficient separation. Vibrating screeners generally have a simpler design compared to rotary screeners, which can make them easier to maintain and repair. Vibrating screeners are suitable for moderate to high throughput applications and are capable of achieving efficient separation in various particle size ranges.