drum filter

Drum filters are filtration devices used in a wide range of fields, including general chemistry, metal industry, food, paper manufacturing, and wastewater and water purification. This article summarizes the structure, applications, features, and types of drum filters.

What is a Drum Filter?

What is a drum filter?Rotating filtration system with cylindrical filtration surfaceof the filter. The filtration surface is lined with a filter cloth or precoating agent, which separates liquids and solids as it rotates.

Drum filters are ideal for collecting large volumes of solids or clear liquids. Filters are available in a variety of materials, from metal to plastic, and with a wide range of filter pore diameters. It is important to select the appropriate device according to the characteristics of the material to be filtered, its purpose, and application.

How Drum Filters Work

While using the basic mechanism of filtration,Continuous and efficient processing is made possible by drum filtersIt is. By rotating the cylindrical filtration surface and working in conjunction with a vacuum pump, scraper, or other device, solids adhering to the filter are separated.

The rotation of the filtration surface in conjunction with the vacuum pump and scraper can handle highly concentrated slurries that are difficult to handle with ordinary filtration equipment, and the system can even dewater the slurry after filtration in one step for efficient continuous processing. It can also handle large volumes of filtrate.

Drum filter applications

Applications for drum filters include

• General chemistry: recovery of solids such as catalysts and calcium carbonate, and recovery of clarified liquids such as organic solvents and acidic liquids
• Metals and mining sector: refining of precious metals such as gold and silver, and nonferrous metals such as copper and zinc
• Food sector: production of sugar, starch, etc.
• Pulp manufacturing field: dewatering and bleaching of pulp
• Environmental field: sewage treatment, industrial wastewater treatment, sludge treatment

Drum filters are,Can be used to collect a variety of materials by changing the pore size of the filter or using a precoating agentTherefore, it is used in a wide variety of fields.

Features and types of drum filters

Drum filters are characterized by their simple mechanism, ease of maintenance, and efficient treatment, making the hurdles to installing equipment low.

Periodic cleaning and replacement of the filter is required, but some types of equipment perform the cleaning automatically. The solids separated by processing are deposited on the surface of the filter, and thisThere are four types, depending on the method used to recover the sediment, known as the "caking layer."

Type by spiral roll and natural exfoliation

This method collects the cake layer by means of a small-diameter roll called a spiral roll and natural peeling. The small-diameter rolls installed in the cake peeling area naturally peel off even thin cake layers.

Type by scraper and air blow

This is the most common method for drum filters, in which the cake layer is peeled off by a scraper and air blow. This method is suitable when the particle size of solids is relatively large and the cake layer is thick.

Type with scraper and roller

This method uses a scraper and a roller. Cake layers as thick as 1 mm can be peeled off. Ideal for removal and recovery of metal hydroxides and particulate oxides.

Type with scraper and precoat layer

This method is employed when it is difficult to peel off the caking layer, where little or no caking layer is formed. Solids trapped in the precoat layer are peeled off with the scraper. This method is best suited for recovering clear filtrate or for treating liquids that contain fine particles and have low concentrations.

Summary of Drum Filters

• Drum filter is a rotating filtration device with a cylindrical filtration surface
• Applications for drum filters are diverse, including general chemicals, metals, food, pulp, and the environment.
• There are four types of sediments depending on how they are collected

Drum filters enable continuous and efficient processing while utilizing the basic mechanism of filtration. They are used in a wide range of applications because they can be used to recover a variety of substances by changing the pore diameter of the filter or using a precoating agent. When using this product, it is important to select the appropriate equipment according to the characteristics of the material to be filtered, its purpose, and application.

• Filter Filtration
• Cyclone Filter

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Coolant filtration system
Three recommendations

Coolant filtration equipment is used to filter sludge generated from equipment. There are a variety of products available depending on the intended use, so it is important to determine "whether the coolant filtration equipment is suitable for the purpose" and "whether the equipment is suited to the characteristics of sludge.

Filter filtration system capable of filtering all "fine" sludge of 3μm or less Filter filtration system capable of filtering all "fine" sludge of 3 microns or less

Sun Maintenance Koki

Reference: Sun Maintenance Koki official website (https://www.smk-web.co.jp/index.html)

Main materials that can be filtered

• Brittle materials such as cemented carbide, ceramics, and castings

For factories like this

• I want to filter fine sludge less than 3μ.
• I want to use it as a secondary process
• To remove sludge that could not be filtered by other equipment

Check equipment on official website

Capable of filtering "large volumes" of up to 200 l/min Centrifuge

Toto Separator Kogyo Co.

Reference: Toto Separator Industry official website (https://centrifuge-tsk.com/)

Main materials that can be filtered

• Brittle materials such as cemented carbide, ceramics, and castings

For factories like this

• I want to filter more than 100 L
• I want to use it as a primary process
• Want to reduce running costs

Check equipment on official website

High magnetic force filters 5 microns or less High magnetic force enables filtration of 5 microns or less. Magnetic Separator

Sumitomo Heavy Industries Finetech, Ltd.

Reference: Sumitomo Heavy Industries Finetech official website (https://www.shi-ftec.co.jp/)

Main materials that can be filtered

• Metal materials such as aluminum, steel, and iron

For factories like this

• I want to filter metal materials.
• I want to use it as a primary process
• I want to remove metal sludge.

Check equipment on official website