How is the performance of coal powder briquetting machine for power plant？

Pulverized coal briquetting machines are increasingly used in power plants to improve fuel efficiency, reduce emissions and enhance operational stability. The performance of pulverized coal briquetting machines in power plants is crucial for efficient energy production and environmental management.

Coal Powder Briquetting Machine for Power Plant Performance

Pulverized coal briquetting machines

1. Briquette Quality:

Strength and Hardness: Briquettes need to be strong enough to withstand handling, transportation, and feeding into the boiler without excessive breakage. Good briquettes minimize dust generation.

Uniformity: Consistent size and shape ensure even combustion in the boiler, preventing hot spots or incomplete burning.

Combustion Characteristics: Briquettes should burn efficiently with minimal ash content and consistent heat release. This directly impacts boiler efficiency and power generation.

2. Production Capacity:

Throughput: The machine’s ability to process a specific tonnage of coal powder per hour. This must match the power plant’s fuel consumption rate.

Continuous Operation: Reliable operation without frequent breakdowns is essential for continuous power generation.

3. Energy Consumption:

Power Efficiency: How much energy (electricity) the machine consumes per ton of briquettes produced. Lower consumption means lower operating costs.

Binder Consumption: If binders are used, their efficiency and the cost associated with them are important factors.

4. Reliability and Durability:

Machine Lifespan: The longevity of components like rollers, bearings, and motors. High-quality construction reduces maintenance and replacement costs.

Wear Resistance: Briquetting machines deal with abrasive coal powder, so wear-resistant materials are vital, especially for the rollers.

Ease of Maintenance: Simple design and accessibility for routine maintenance and part replacement minimize downtime.

Pulverized coal briquetting machines

5. Environmental Performance:

Dust Control: Effective sealing and dust collection systems are crucial to minimize airborne coal dust, improving workplace safety and environmental compliance.

Waste Utilization: By briquetting coal powder (often a waste product), the machine helps reduce waste and utilize a valuable resource.

6. Automation and Control:

…

For more detailed information about the performance of the power plant coal pulverized pelletizing machine, please click here: https://www.zymining.com/en/a/news/coal-powder-briquetting-machine-for-power-plant-coal-powder-performance.html

/by

How Briquetting Machines Transform Waste into Energy

Briquetting machines are powerful tools that compact various types of waste materials into dense, solid briquettes. These briquettes can then be used as a renewable energy source. Let’s explore how these machines work and the benefits they offer.

How Briquetting Machines Transform Waste into Energy

Briquetting machines

The Briquetting Process

The process typically involves a few key steps:

Material Preparation: Raw waste materials, such as sawdust, agricultural residue (like rice husks or sugarcane bagasse), paper, or even certain plastics, are first prepared. This might involve drying the material to reduce moisture content and sometimes crushing or shredding it to a uniform size.

Feeding: The prepared material is fed into the briquetting machine’s hopper. From there, it’s typically moved into the compression chamber by a screw conveyor or similar mechanism.

Compression: This is the core of the briquetting process. Inside the machine, immense pressure is applied to the waste material. This pressure, often combined with heat generated by friction, causes the lignin (a natural binder in woody materials) or other binders (if added) to activate, fusing the particles together.

Ejection: Once compacted into a solid form, the briquette is ejected from the machine, ready for cooling and storage.

Types of Briquetting Machines

There are several types of briquetting machines, each suited for different materials and production scales:

Mechanical Briquetting Machines: These use a ram or punch to compress the material. They are often robust and good for high-volume production.

Hydraulic Briquetting Machines: These use hydraulic cylinders to exert pressure. They are versatile and can handle a wide range of materials, often producing very dense briquettes.

Screw Briquetting Machines: These use a rotating screw to compress and extrude the material through a die. They can achieve high densities and are particularly effective for materials with natural binders like lignin.

Briquetting machines

Benefits of Briquetting

Waste Reduction: Briquetting significantly reduces the volume of waste materials, making storage and transportation more efficient.

Renewable Energy Source: Briquettes are an excellent alternative to fossil fuels like coal. They burn cleanly and have a high caloric value, providing a sustainable energy source for industrial boilers, kilns, and even domestic heating.

…

More details on how briquetting machines can turn waste into energy can be found at: https://www.zymining.com/en/a/news/waste-to-energy.html

/by

What are the advantages of using a briquetting machine to form briquette?

Briquetting machines compress loose, often discarded, materials like sawdust, agricultural waste, and even metal scraps into dense, solid blocks called briquettes. Using a briquetting machine to form briquettes offers several advantages, especially in waste management, energy production, and resource utilization.

Advantages of Using Briquetting Machine to Form Briquette

Briquetting Machine

Volume Reduction: Briquetting significantly reduces the volume of loose raw materials like sawdust, agricultural waste, and charcoal dust. This makes storage and transportation much more efficient and cost-effective.

Increased Calorific Value/Energy Density: Briquettes have a higher density than their raw material counterparts, leading to a higher calorific value per unit volume. This means they burn hotter and longer, making them a more efficient fuel source.

Improved Handling and Storage: The uniform size and shape of briquettes make them much easier to handle, stack, and store compared to loose biomass or dust. This also reduces material loss due to scattering.

Environmental Benefits:

Waste Utilization: Briquetting transforms various organic wastes (like agricultural residues, forest waste, and industrial by-products) into valuable fuel, reducing landfill burden and promoting a circular economy.

Reduced Deforestation: By providing an alternative fuel source, briquettes can help reduce reliance on firewood and charcoal made from trees, thereby mitigating deforestation.

Cleaner Burning: Compared to raw biomass, briquettes often burn more completely and with less smoke, potentially leading to reduced air pollution.

Briquetting Machine

Cost-Effectiveness:

Lower Transportation Costs: Due to reduced volume and increased density, fewer trips are needed to transport the same amount of energy, saving on fuel and logistics.

Value Addition: Transforming waste into briquettes creates a new marketable product, adding value to what would otherwise be discarded.

Consistent Quality: Briquetting machines produce briquettes of consistent size, shape, and density, which allows for more predictable and efficient combustion in stoves and boilers.

…

For more detailed information on the advantages of using briquetting machine to form briquette, please click here:https://www.zymining.com/en/a/news/advantages-of-using-briquetting-machine-to-form-briquette.html

/by

What are the briquetting processes for different materials?

Briquetting is a process that compacts loose, raw materials into dense, solid blocks called briquettes. This is done to increase their density, making them easier to handle, store, and transport, and often to improve their combustion or recycling value. The specific process varies depending on the material’s properties, such as its natural binding agents and required final density.

Briquetting Process for Different Materials

briquetting machine

The main briquetting processes are categorized by the type of machine used: hydraulic presses, mechanical piston presses, and screw presses. Each is suited for different materials.

Biomass Briquetting

Biomass includes agricultural residues (like rice husks, sugarcane bagasse, and crop stalks), forestry waste (sawdust and wood chips), and municipal waste. The process for biomass typically relies on the natural binder, lignin, which is present in the plant matter.

Piston Press Briquetting: This process uses a mechanical or hydraulic piston to compact the biomass into a cylinder. The friction and high pressure generated by the piston raise the material’s temperature to around 250-300°C. This heat causes the lignin to soften and act as a natural glue, binding the material together. The briquettes are then pushed through a die, which shapes them and provides additional compression.

Screw Press Briquetting: An auger (screw) continuously feeds and compresses the biomass into a heated, tapered die. The friction and heat generated by the screw and the die melt the lignin, creating a very dense, often hollow, briquette. The hollow center can improve combustion by increasing the surface area for air circulation.

Coal and Charcoal Briquetting

Coal and charcoal briquetting typically involves adding a binder to the fine particles to achieve a strong, stable final product.

Roller Press Briquetting: This is a common method for coal fines and charcoal dust. The process involves mixing the finely crushed material with a binder (like molasses, starch, or clay). The mixture is then fed between two counter-rotating rollers that have matching pockets or molds on their surfaces. The high pressure from the rollers compresses the material into uniform, pillow-shaped briquettes. These briquettes are then dried to harden the binder and increase their strength.

Extrusion Briquetting: A screw or ram extruder forces the coal/binder mixture through a die to form a continuous log or cylinder. The shape and size of the briquette are determined by the die. This method is often used for creating briquettes with a central hole, which can improve their burning efficiency.

briquetting machine

Metal Briquetting

Metal briquetting is used for converting scrap metal, such as chips, shavings, and turnings from machining processes, into compact, solid blocks. This process is binder-free and focuses on applying immense pressure to cold-weld the metal particles together.

…

More detailed information about the briquetting process for different materials can be found here: https://www.zymining.com/en/a/news/briquetting-process-for-different-materials.html

/by

How to Choose the Right Vibrating Screen for Your Industry

Vibrating screens are essential equipment in various industries, from mining and metallurgy to construction and food processing.Selecting the right type of vibrating screen can significantly impact efficiency, product quality, and operational costs. Here’s a detailed guide to help you make the best choice for your industry.

How to Choose the Right Vibrating Screen for Your Industry

High Frequency Dehydration Vibrating Screen

Understand Your Material:

Type of Material: Is it wet, dry, sticky, abrasive, or corrosive? This will influence the screen deck material and design.

Particle Size Distribution: What are the largest and smallest particles? What percentage of each size do you have? This determines screen opening size and number of decks.

Bulk Density: The weight of your material per unit volume affects screen capacity.

Moisture Content: High moisture content can lead to blinding (material sticking in screen openings) and may require specialized cleaning systems or screen types.

Define Your Screening Objectives:

Separation Points (Cut Points): What precise particle sizes do you need to separate? This directly dictates the screen mesh size.

Capacity Requirements: How many tons per hour (TPH) or cubic meters per hour (m³/hr) do you need to process? This influences screen size and width.

Efficiency: What percentage of accurate separation do you need? Higher efficiency may require more precise screen media or multiple screening stages.

Number of Fractions: How many different product sizes do you need to produce? This determines the number of decks on your screen (e.g., single, double, triple deck).

Consider Different Types of Vibrating Screens:

Inclined Screens:

Pros: High capacity, good for general-purpose screening, relatively simple design.

Cons: Can be less efficient for very fine separations, potential for blinding with sticky materials.

Typical Applications: Aggregate, mining, sand and gravel.

Horizontal Screens:

Pros: Excellent for close-tolerance sizing, dewatering applications, can handle higher bed depths, precise material stratification.

Cons: Lower capacity than inclined screens of the same size, more complex drive mechanism.

Typical Applications: Fine aggregate, industrial minerals, recycling, dewatering.

High-Frequency Screens:

Pros: Very effective for fine, dry materials, prevents blinding, high efficiency for fine separations.

Cons: Not suitable for large particle sizes or high capacities, screen media wears faster.

Typical Applications: Sand, industrial minerals, chemical processing.

…

More detailed information on how to choose the right vibrating screen for your industry can be found at: https://www.hsd-industry.com/news/how-to-choose-the-right-vibrating-screen-for-your-industry/

/by

What are the methods to improve the efficiency of vibrating screen?

Vibrating screens are essential equipment in many industries, particularly in mining, aggregates, and recycling, for separating materials by size. Improving their efficiency can significantly impact productivity and reduce operational costs.

Methods to Improve Vibrating Screen Efficiency

Single layer horizontal sieve

1. Optimize Feed Material Distribution:

Even Spreading: Ensure the material is fed uniformly across the entire width of the screen. Uneven distribution leads to localized overloading and inefficient screening of other areas.

Controlled Feed Rate: Maintain a consistent and appropriate feed rate. Too much material can blind the screen and reduce stratification, while too little can waste screen capacity.

Feed Box Design: Utilize well-designed feed boxes and chutes that help spread the material evenly and absorb some of the impact energy, protecting the screen media.

2. Select the Right Screen Media:

Material Type: Choose screen media (wire mesh, polyurethane, rubber, punch plate) that is suitable for the specific material being screened.

Considerations include abrasiveness, stickiness, and particle shape.

Opening Size and Shape: Ensure the opening size and shape are appropriate for the desired separation and material characteristics. Tapered or slotted openings can sometimes improve screening efficiency for certain materials.

Open Area: Maximize the open area of the screen media without compromising strength or wear life. A larger open area allows more material to pass through.

Self-Cleaning Media: For sticky or damp materials, consider self-cleaning screen media, such as harp screens or anti-blinding solutions, to prevent pegging and blinding.

Double banana sieve

3. Adjust Screen Parameters:

Stroke and Frequency: Optimize the screen’s stroke (amplitude) and frequency (vibrations per minute) based on the material’s characteristics and desired separation. Higher frequency and smaller stroke are often better for finer separations, while larger stroke and lower frequency are suitable for coarser materials.

…

More detailed information on how to improve vibrating screen efficiency can be found at: https://www.hsd-industry.com/news/methods-to-improve-vibrating-screen-efficiency/

/by

What are the differences between linear vibrating screen and rotary vibrating screen?

Vibrating screens are essential equipment in many industries for separating materials by particle size. Both linear and rotary vibrating screens achieve this, but they differ significantly in their mechanism, application, and performance.

Differences Between Linear Vibrating Screen and Rotary Vibrating Screen

Cooperation Customer

Linear Vibrating Screen

A linear vibrating screen moves material in a straight line.

Here’s how it generally works and its characteristics:

Movement: The screen box vibrates in a linear, back-and-forth motion, which propels the material along the screen surface. This motion is typically generated by two unbalanced motors rotating in opposite directions.

Angle: The screen surface is usually inclined at a slight angle to aid material flow.

Separation Principle: The linear motion helps stratify the material, with finer particles falling through the mesh openings while coarser particles move along the screen.

Advantages:

High screening efficiency for a wide range of materials.

Suitable for both wet and dry screening.

Can handle larger capacities for certain applications.

Less prone to blinding (clogging of screen mesh) with certain materials due to the strong linear action.

Applications: Commonly used in mining, aggregates, chemical, food, and fertilizer industries for sizing, scalping, and dewatering.

High Frequency Dehydration Vibrating Screen

Rotary Vibrating Screen (Circular Vibrating Screen)

A rotary vibrating screen, also known as a circular vibrating screen or gyratory screen, uses a circular or elliptical motion to separate materials.

Here’s a breakdown of its characteristics:

Movement: The screen box performs a circular, elliptical, or parabolic motion. This is typically achieved by a single unbalanced motor mounted centrally on the screen. The motion creates a continuous rolling and stratifying action of the material.

…

For more detailed information about the difference between linear vibrating screen and rotary vibrating screen, please click here: https://www.hsd-industry.com/news/differences-between-linear-vibrating-screen-and-rotary-vibrating-screen/

/by

What are the reasons for the low screening efficiency of linear vibrating screen?

A linear vibrating screen is widely used in industries such as mining, metallurgy,chemical engineering, and building materials for separating and grading bulk materials. Its efficiency directly
affects production output, product quality, and energy consumption. However, in actual operation, many users encounter problems of low screening efficiency, which leads to poor separation results and increased production costs.

Reasons for Low Screening Efficiency of Linear Vibrating Screen

Cooperation Customer

Improper Screen Media Selection:

Wrong Mesh Size: If the mesh size is too small, it can lead to blinding and reduced throughput. If it’s too large, it won’t effectively separate the desired particle sizes.

Inappropriate Material: The screen material (e.g., woven wire, polyurethane, rubber) needs to be suitable for the material being screened. Abrasive materials require more durable screen media.

Material Characteristics:

High Moisture Content: Wet, sticky materials can easily blind the screen openings, reducing the effective screening area.

High Clay Content: Clay particles can clump together and stick to the screen.

Varied Particle Shapes: Flat, elongated, or irregularly shaped particles can pass through undersized openings or cause blinding.

Excessive Fines: A high percentage of very fine particles can lead to blinding and reduce the overall efficiency.

Operational Parameters:

Feed Rate:

Too High: Overloading the screen can cause a thick material bed, preventing efficient stratification and particles from reaching the screen surface. It also reduces retention time.

Too Low: An excessively low feed rate might not create a consistent material bed, leading to inefficient use of the screen area.

Vibration Amplitude and Frequency: These parameters are crucial for effective material stratification and transport.

Incorrect Amplitude: Too low, and material won’t fluidize effectively. Too high, and it might “bounce” off the screen without passing through.

Incorrect Frequency: Needs to be tuned to the material characteristics and screen size.

Screen Angle (Deck Angle): The angle of inclination affects material speed and retention time on the screen.

Too Steep: Material moves too fast, insufficient time for particles to pass through.

Too Flat: Material moves too slowly, potentially leading to a thick bed and blinding.

Stroke Direction: The angle of throw from the vibrators influences material movement and stratification.

High Frequency Dehydration Vibrating Screen

Screen Condition and Maintenance:

Blinding/Pegging: Screen openings getting blocked by near-size particles (pegging) or sticky material (blinding) is a primary cause of inefficiency.

…

For more detailed information about the reasons for low screening efficiency of linear vibrating screen, please click here: https://www.hsd-industry.com/news/reasons-for-low-screening-efficiency-of-linear-vibrating-screen/

/by

How to choose grease for cross roller bearings

Choosing the right grease for a crossed roller bearing is essential for its performance, longevity, and reliability. The wrong grease can lead to premature failure, excessive friction, and heat generation. The selection process depends on several critical factors related to the bearing’s operating conditions.

crossed roller bearing

Key Factors for Grease Selection

Operating Temperature: This is one of the most important factors. The grease must be able to perform effectively within the temperature range of the application.

Base Oil Viscosity: The viscosity of the base oil (the lubricant component) changes with temperature. It’s crucial that the base oil maintains sufficient viscosity at the operating temperature to form a protective lubricating film.

Dropping Point: The dropping point is the temperature at which the grease changes from a semi-solid to a liquid. The operating temperature should be well below the grease’s dropping point (typically by 10-20°C for mineral greases and 20-30°C for synthetic greases).

Types of Grease: Different thickeners and base oils are suited for different temperature ranges. For example, synthetic greases are often used for extreme high or low temperatures.

Loads: The load on the bearing determines the required film strength of the grease.

High Loads: Applications with heavy or shock loads require grease with a higher base oil viscosity and, often, with Extreme Pressure (EP) additives. These additives create a protective layer to prevent metal-to-metal contact under high pressure.

Low Loads: For lighter loads, a lower viscosity grease is generally sufficient.

Speed (Rotational Speed): The rotational speed of the bearing is a key factor in selecting both the base oil viscosity and the grease consistency (NLGI grade).

High Speeds: High speeds generate more friction and heat. A lower viscosity base oil and a softer consistency grease (lower NLGI number, e.g., NLGI 1 or 2) are typically used to minimize friction and allow for better heat dissipation.

Low Speeds: Very low-speed applications with heavy loads may benefit from a higher viscosity base oil and a stiffer grease (higher NLGI number) to ensure the lubricating film is maintained.

Environment: The operating environment can introduce contaminants or moisture that affect the grease’s performance.

Dust and Contaminants: Grease acts as a sealant to prevent contaminants from entering the bearing. A stiffer grease (higher NLGI grade) is often better for this purpose.

…

More detailed information on how to choose grease for crossed roller bearings can be found at:https://www.prsbearings.com/a/news/grease-selection-for-cross-roller-bearings.html

/by

How to adjust the preload of a crossde roller bearing？

Adjusting the preload of a crossed roller bearing is critical for achieving optimal performance, stiffness, and accuracy. It’s the process of applying a controlled internal load during assembly to remove internal clearance and ensure the bearing’s rollers and raceways are in continuous contact.

Common Methods for Preload Adjustment

crossed roller bearing

The specific method for adjusting preload depends on the bearing’s design and application. Here are the most common approaches:

Split Inner Ring or Outer Ring: Some crossed roller bearings are manufactured with a split inner or outer ring. During assembly, this split ring is compressed or expanded, often by a locknut or screws, to create the desired preload. This method is common for bearings used in high-precision applications like machine tool spindles and robotic joints.

Using Shims and Spacers: This method involves inserting precise shims, sleeves, or spacers between bearing rings or between the bearing and its housing. By carefully selecting the thickness of these components, the axial distance between the bearing races is controlled, thus setting the preload. This is a very accurate method, often used in individual bearing arrangements.

Adjustment Screws: For linear crossed roller guides and some rotary applications, preload is adjusted using a series of set screws along an adjustable rail. The screws are tightened in a specific sequence to apply even pressure and remove play. The technician checks for smooth movement by hand to confirm the correct preload has been achieved. Over-tightening can cause excessive friction and damage.

…

More detailed information on how to adjust the preload of crossed roller bearings can be found at:https://www.prsbearings.com/a/news/adjustment-of-preload-in-crossed-roller-bearings.html

/by