Micro-mesh Drum Filter

Product Introduction

Micro-mesh drum filter is a filtering device for removing suspended solids. The device is composed of several filter meshes placed over a rotating drum, and the filter meshes can be easily disassembled and replaced. The size of the filter mesh is between 10μm and 200μm. Customers can choose different mesh sizes according to the water output requirements.

The product has the following features:

1. Long service life of filter meshes, easy replacement, and thorough cleaning.

2. Fast filtering speed.

3. Simple construction and easy maintenance.

4. Small head loss.

5. Small footprint.

6. Low water consumption for backwashing.

7. Low operating energy consumption.

Working Principle

Micro-mesh drum filter is equipped with stainless steel filter meshes with a filtration accuracy of 10-200μm. The filter meshes are covered on the drum, which rotates slowly and continuously.

The sewage will flow into the drum by gravity. The lower half of the drum is effective filtration area, the clean water will flow out of the drum through the filter meshes, and the suspended solids will be intercepted. As the drum rotates, the suspended solids will be carried to the top of the drum.

The backwash device is set on the top of the drum, continuously flushing from the outside to the inside. After backwash, the slag will be collected by an independent slag collection tank set inside the drum and discharged by gravity.

The filtered water will be reused by the backwash device, the pressure of the flushing pump is high enough to ensure that the dirty filter meshes can be completely cleaned, and ensure that the filter meshes always maintain normal flux. The small flow and high head design of the flushing pump minimizes the backwash water consumption.

Equipment Structure

Micro-mesh drum filter operates continuously. When the suspension liquid is fed into the drum, the automatic control system will start to drive the drum to rotate and start the backwash pump at the same time.

The drum starts to rotate slowly, and the backwash pump extracts the filtered water to backwash the filter meshes. The slag will be collected by the backwash water collection tank inside the equipment and discharged through the slag outlet.

While backwashing, the filtering process is not affected and running normally. When there is no water passing through the equipment, the equipment will stop automatically. 

1. Composition of micro-mesh drum filter.

· Stainless steel machine body.

· Core filtration system.

· Drive system.

· Backwash system.

· Control system.

2. Machine body.

The housing of the micro-mesh drum filter is made of 304 stainless steel, including the central water inlet pipe, drum, transmission gear, bearings, sealing parts and other assembly components. A slag collection tank is set on the top of the drum. All parts are made of 304 stainless steel.

3. Filtration system.

There are 4~12 independent filter meshes covered on the drum, the quantity of the meshes are determined according to different processing capacity. Each filter mesh can be easily disassembled and assembled. The main filter mesh is in the middle, made of 316L stainless steel, and the upper and lower meshes are made of 304 stainless steel. The outermost layer is the keel, which is used to increase the strength of the filter meshes. The filter meshes and the keel are formed at one time through a special sintering process.

4. Drive system.

The drive system consists of a drive motor, a sprocket, and a drum support. The power supply of the drive motor is 380V (400V/415V/480V) /50Hz (60Hz)/three-phase AC.

5. Backwash system.

The backwash system includes a backwash water pump, a flushing water pipe, a nozzle system, a dirt collection tank, and a sewage pipe. The function of the backwash system is to use a pump to extract filtered water and flush the filter cloth from the outside to the inside by spraying a high-pressure fan-shaped water column, so that the suspended matter accumulated on the inner surface of the filter cloth is flushed into the collection tank below and flows into other process equipment through the pipeline.

6. Control system.

a. The micro-mesh drum filter can be controlled by combining automatic control and manual control during filtration operation. The control system is manufactured in accordance with the standards of the International Electrical Manufacturers Association.

b. The housing of the control cabinet is made of 304 stainless steel.

c. The control box is equipped with an on-off button, an automatic-manual conversion switch, an emergency stop button, and an on-off-fault indicator. All control and protection circuits are separated, and the buttons and indicator lights are matched.

d. The main motor frequency conversion control can automatically adjust the frequency according to the water level, thereby adjusting the speed of the drum to achieve intelligent control.

e. The system is controlled by PLC.

Application Areas

1. Municipal sewage treatment.

2. Industrial wastewater treatment.

3. Drinking water and water purification.

4. Reclaimed water reuse and circulating water.

5. Water resource recovery and ecological water replenishment.

6. Agriculture and aquaculture.

Technical Parameters