II Main application scope:

Dehydration treatment of various industrial wastewater and sludge

Slaughter and livestock sludge dewatering treatment

Dehydration treatment of sludge from urban sewers, water and fertilizer plants, and water purification plants

Solid/liquid separation and dehydration treatment in food, chemical, mining, and various industrial processes

3、 The working principle and dehydration process of belt filter press:

After the concentrated sludge is fully mixed with a certain concentration of flocculant in a static and dynamic mixer, the small solid particles in the sludge aggregate into larger flocculent clumps, and free water is separated. The flocculated sludge is transported to a filter belt for concentration gravity dewatering, where free water is separated under the action of gravity to form a non flowing sludge. It is then sandwiched between two mesh belts and gradually squeezed through a wedge-shaped pre pressure zone, a low-pressure zone, and a high-pressure zone under the action of small to large extrusion pressure and shear force to achieve a large degree of separation between sludge and water, forming a filter cake for discharge.

1. Chemical pretreatment dehydration

In order to improve the dewatering performance of sludge, enhance the properties of filter cake, and increase the permeability of materials, chemical treatment of sludge is required. This machine uses a unique "water flocculation granulation mixer" device to achieve chemical dosing flocculation. This method not only has good flocculation effect, but also saves a lot of chemicals, with low operating costs and significant economic benefits.

2. Gravity concentration dehydration section

The sludge is evenly fed into the mesh belt through the material hopper, and the sludge moves forward with the filter belt. The free water flows into the water receiving tank through the filter belt under its own weight. Gravity dewatering, also known as the highly concentrated section, mainly removes the free water from the sludge, reducing its fluidity and preparing for further squeezing.

3. Wedge shaped pre pressure dehydration section

After gravity dewatering, the fluidity of the sludge is almost completely lost. As the filter belt of the belt filter press moves forward, the distance between the upper and lower filter belts gradually decreases, and the material begins to experience slight pressure. As the filter belt runs, the pressure gradually increases. The function of the wedge-shaped zone is to extend the gravity dewatering time, increase the extrusion stability of the flocs, and prepare for entering the pressure zone.

4. High pressure dehydration section of squeezing roller

When the material leaves the wedge-shaped zone, it enters the pressure zone where it is compressed. The pressure along the direction of the filter belt increases with the decrease of the diameter of the compression roller, causing the material to shrink in volume. The free water in the gaps inside the material is squeezed out, and at this point, a filter cake is basically formed. Continuing forward to the high-pressure zone at the end of the pressure, the water content of the filter cake can be reduced to a low level after passing through high pressure.

After the dehydration treatment in the above stages, the material forms a filter cake and is discharged. It is scraped off by a scraper plate, and the upper and lower filter belts are separated. After high-pressure flushing water is used to remove trace materials between the filter holes, it continues to enter the next dehydration cycle.

The main characteristics of four crystal frequency converters in motor applications are:

1. High low-frequency torque and stable output

2. High performance vector control

3. Fast torque dynamic response and high speed stability accuracy

4. Slow down and stop quickly

5. Strong anti-interference ability

5、 Structural characteristics of belt filter press:

The belt filter press has a compact structure, novel style, convenient operation and management, large processing capacity, low moisture content in the filter cake, and good effect. Compared with similar devices, it has the following characteristics:

1. The gravity dewatering section is inclined, and the distance between the sludge liquid level and the filter cloth is up to 300mm, which increases the static water head h of the sludge in the gravity dewatering section and improves the gravity dewatering capacity.

2. The gravity dewatering section is long, with a total length of over 5 meters for the first and second gravity dewatering sections, allowing the sludge to be fully dehydrated and lose its fluidity before pressing. At the same time, the gravity dewatering section is also equipped with special mechanisms such as reverse rotation, which can achieve low water content in the sludge filter cake through "wedge" and "S" shaped pressing.

3. The dewatering roller adopts a "T" - shaped drainage groove, which quickly discharges a large amount of water after pressing, thereby improving the dewatering effect.

4. The filter belt deviation is equipped with an automatic control device, and the tension and movement speed of the filter belt can be freely adjusted, making operation and management convenient.

5. Low noise and no vibration.

6. Low usage of chemical drugs

6、 Application:

This machine is suitable for sludge dewatering in wastewater treatment processes in urban sewage treatment plants, pharmaceuticals, electroplating, papermaking, leather, printing and dyeing, metallurgy, chemical industry, slaughter, food, brewing, coal washing, and environmental engineering. It can also be used in industrial production for solid-liquid separation and is an ideal equipment for environmental treatment and resource recovery.