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Advantages and disadvantages of belt filter press

Advantages and disadvantages of belt filter press

Advantages

1. Belt filter press can process special sludge,

Some sludge, for example: railway, oil and sludge produced by treating wastewater with diatomite. Other types of filter presses cannot process well, and belt filter press can achieve good results.

2. Low energy costs

Under the same circumstances, the belt filter press has the same treatment effect as other filter presses, but the water consumption and power consumption is only 1/3 of other equipment.

3. Small space occupation

Due to the special structure, the belt filter press occupies only 1/2 of the equipment. Buit achieves the same treatment effect as other filter presses.

4.Stable operation and long service life

The filter belt with machine has high strength and short length. Because of the special adjustment structure, it is not easy to damage. The filter belt has long service life and stable operation. High-strength stainless steel bearings are used instead of conventional carbon steel bearings. The corrosion resistance is greatly improved and the service life of the equipment can reach 10 years.

5.Easy operation

Due to the simple structure and reasonable design, the operation of the belt filter press is not as complicated as other filter presses, even ordinary workers can operate it.

6.Continuous operation

The belt filter press does not operate intermittently like other filter presses. The belt filter press guarantees continuous operation for 24 hours.

Disadvantages:

1.It’s suitable for high sludge moisture content

2.Maintenance is difficult.

Belt filter press site photo

Belt filter press site photo

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Belt filter press site photo

Belt filter press site photo

Belt press vs Filter press

Belt press and filter press are the most commonly used sludge dewatering equipment, which are to reduce the moisture content of sludge, sludge volume, so as to achieve dry sludge discharge. They are widely used for the filtration separation of solid-liquid mixture produced in muddy water, urban sewage treatment, food processing, petrochemical, metallurgical manufacturing, mining, metal forging, pharmaceutical and pharmaceutical, electronics, chemical and other industries.

Basic overview

Belt press is a device for constructing solid-liquid separation by the tension of track. The dehydration process can be divided into four important steps: pretreatment, gravity dewatering, wedge zone pressure dewatering and press dewatering. Conducive to materials with dissolved taste or gas, bright flow exhaust liquid.

Filter press is a machine that takes pressure from pump to build solid-liquid separation, which is widely used in sludge dewatering projects in Europe and America. The filter plates and filter frames are arranged into a filter chamber, and under the pressure of feed pump, feed liquid is sent to each filter chamber, and the solid medium and liquid are separated by the filter medium.

Working manner

Belt press: continuous dewatering

Filter press: Intermittent dehydration

Working process

The main difference: filter power
Sludge dewatering belt press is composed of a sludge layer sandwiched between upper and lower tensioning belts, and passes through a series of regularly arranged roller cylinders in an S shape, and relies on the tension of filter belt itself to form a squeeze layer on the sludge layer. The pressing and shearing force squeezes out the capillary water in sludge layer to achieve sludge dewatering.

Filter press is an intermittent solid-liquid separation device. The sludge pumped by high-pressure pump is squeezed through the plate frame, so that water in sludge is discharged through filter cloth to achieve the purpose of dehydration. At the same time, it is also possible to carry out the solid-liquid separation of the mud cake, such as washing, damp and other auxiliary processes. The airtightness is very good and it is possible to construct an undercurrent exhaust gas.

Application

Belt presses are generally used in sludge dewaterning treatment, large sewage treatment plants, waterworks, etc.

Filter presses are generally used for sludge dewatering in mining, especially for where required high dewatering effect, to reduce sludge volume and reduce post-treatment costs.

Advantages and disadvantages

Belt filter press advantages:

1. large processing capacity, high dewatering efficiency
2. Running continuously, easy management;
3. Long service life, low auxiliary equipment and low energy consumption.

Belt filter press disadvantages:

1. Large amount of flocculant used together, high operating cost;
2. Large water content of mud cake than chamber filter press.

Chamber filter press advantages：

1. Filter cake has a low moisture content and generally does not exceed 30%;
2. High solid content;
3. Less flocculant used.

Chamber filter press disadvantages:

1. Work efficiency is relatively low because of the intermittent operation;
2. Need to change the filter cloth regularly.

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