China Rotary vacuum drum filter working principle-Xinxiang Yinuo Machineries Co., Ltd.

The rotary vacuum drum filter is a continuous solid-liquid separation device whose core principle involves automated filtration achieved through drum rotation and vacuum suction.

Core Structure

The structure of the rotary vacuum drum filter revolves around the core component, the “drum,” primarily comprising five main sections:

1. Drum: The main body of the equipment is typically cylindrical, covered with filter cloth on the surface, and internally divided into multiple independent filter chambers;

2. Vacuum System: Includes vacuum pumps and piping, providing negative pressure to the filter chambers—the key mechanism for generating suction;

3. Feed Tank: Located beneath the drum, it holds the liquid requiring filtration, with the drum partially submerged within it;

4. Cleaning and Discharge System: The cleaning mechanism removes residual filter cake via spraying, while the discharge system scrapes the filtered cake off the filter cloth;

5. Drive System: Composed of a motor and reducer, it drives the drum to rotate at a stable speed, ensuring continuous operation.

Key Features

Continuous Operation

The drum rotates continuously, enabling simultaneous completion of suction filtration, filter cake formation, cleaning, and discharge without interruption.

High Automation

Requires only equipment startup and parameter setting; subsequent filtration and discharge steps require no manual intervention.

Consistent filtration efficiency

Uniform vacuum suction combined with fixed drum rotation speed ensures consistent filter cake thickness and filtration performance.

Wide applicability

Compatible with various viscosities and particle sizes by replacing filter cloths of different materials.

Core Benefits

1. Enhanced Production Efficiency: Compared to intermittent equipment like plate-and-frame filters, it eliminates frequent shutdowns for unloading, achieving higher throughput per unit time;

2. Reduced labor costs: Automated operation minimizes manual involvement, eliminating cumbersome processes like manual unloading and cleaning;

3. Guaranteed product quality: Thorough filtration under vacuum conditions and complete filter cake washing reduce impurity residue, enhancing the purity of both solid and liquid phases post-separation.

4. High operational stability: Precise control of equipment parameters minimizes human influence, making it suitable for large-scale industrial production.

Application Areas

Rotary vacuum drum filters are highly adaptable and thus widely used across multiple industrial sectors.

1. Chemical Industry: Used for solid-liquid separation in products like synthetic resins, dyes, and pesticides, such as pigment particle recovery in pigment production.

2. Food Industry: Processing juices, beer, starch slurries, and similar liquids, such as separating starch from water in starch production.

3. Pharmaceutical Industry: Separating antibiotic fermentation broths, traditional Chinese medicine extracts, and other substances to ensure drug purity.

4. Mining and Environmental Protection: Treating mineral slurries after flotation and industrial wastewater to achieve solid waste recovery and wastewater purification.

Chemical Industry

Food Industry

Pharmaceutical Industry

Mining and Environmental Protection

Common Troubleshooting Methods

Fault phenomenon	Possible reasons	Exclusion method
The filtering speed slows down	1. Filter cloth blockage 2. Insufficient vacuum degree 3. The viscosity of the material liquid increases	1. Clean or replace the filter cloth 2. Check if the vacuum pump is leaking and replenish the vacuum oil 3. Adjust the temperature or concentration of the feed solution
Uneven thickness of filter cake	1. Unstable drum speed 2. Fluctuations in the liquid level of the material tank 3. Difference in vacuum degree of filter chamber	1. Inspect the transmission system and adjust the speed 2. Stabilize the feed rate of the liquid and maintain the liquid level 3. Check the sealing of the filter chamber and repair the leaking area
Incomplete unloading	1. The gap between the scraper and the drum is too large 2. The humidity of the filter cake is too high 3. Filter cloth aging and wrinkling	1. Adjust the position of the scraper to reduce the gap 2. Increase the vacuum degree or decrease the drum speed to increase the dryness of the filter cake 3. Replace the filter cloth with a new one
Equipment abnormal noise	1. Insufficient lubrication of transmission components 2. Unbalanced drum 3. Loose components	1.Addlubricatingoiltocomponentssuchasbearingsandgears2.Checkwhetherthedrumisdeformedandperformbalancecorrection3.Tightenallconnectingbolts

Rotary Vacuum Drum Filter Manufacturer

Leveraging its core advantages of continuous and automated operation, the rotary vacuum drum filter efficiently addresses solid-liquid separation requirements across chemical, food, and pharmaceutical industries. A clear understanding of its structure, features, and troubleshooting methods further ensures stable equipment performance.

As a specialized filter manufacturer, Yinuo Machinery possesses extensive expertise in equipment selection, filter cloth adaptation, and troubleshooting. Should you have any questions regarding filter operation or procurement, please feel free to contact us at any time. Our consultation email is: info@vacuumdrumfilters.com.

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