For the plate and frame filter press in the mud press process of stained cloth and high water content problems, we can analyze and solve from the following aspects:

A, plate and frame filter press mud stained filter cloth causes and solutions

Cause:

Sludge properties: The viscosity of the sludge is higher, or contains more fine particles, which is easy to form a adhesive layer on the filter cloth.

Filter cloth material: The material or weaving method of the filter cloth is not suitable for the characteristics of the current sludge, resulting in sludge easy adhesion.

Improper operation: improper pressure control in the filtration process, or the filter cloth cleaning is not timely and incomplete, resulting in sludge residue.

Solution:

Optimize sludge properties: Proper conditioning of the sludge before filtration, such as adding an appropriate amount of conditioner to reduce the viscosity of the sludge.

Select the right filter cloth: Select the right filter cloth material and weaving method according to the nature of the sludge, in order to improve the filtration effect and reduce the phenomenon of stained filter cloth.

Standard operation: strictly control the pressure in the filtration process, and regularly clean the filter cloth to ensure the cleanliness and filtration efficiency of the filter cloth.

Two, plate and frame filter press mud moisture content of high reasons and solutions

Cause:

No added sludge conditioner: the sludge is not treated with the conditioner and is directly filtered, resulting in difficult release of water in the sludge.

Many hydrophilic groups on the surface of the sludge: there are a large number of hydrophilic groups on the surface of the sludge, making it difficult to separate water from the sludge.

Uneven mixing of sludge and conditioner: inadequate mixing of sludge and conditioner, resulting in poor conditioning effect.

Low solid content of sludge before filtration: the water content in the sludge is too high, and the solid content is low, which increases the difficulty of filtration.

Solution:

Adding sludge conditioner: Adding an appropriate amount of conditioner to the sludge before filtration to improve the dewatering performance of the sludge.

Damage the hydrophilic groups on the surface of the sludge: by adding appropriate chemical agents or physical methods, damage the hydrophilic groups on the surface of the sludge and reduce the water retention of the sludge.

Fully mixing sludge and conditioner: ensure that the sludge and conditioner are fully mixed evenly to improve the conditioning effect.

Improve the solid content of sludge: Concentrate the sludge before filtration to increase the solid content of sludge and reduce the water content.

In addition, the following measures can be considered to further reduce water content:

Optimize the filtration process: adjust the pressure of the filter press, filtration time and feed speed and other parameters to improve the filtration effect.

The use of auxiliary dehydration methods: such as vacuum filtration, thermal drying and other auxiliary dehydration methods, can further reduce the moisture content of the sludge.

In summary, for the plate and frame filter press mud filter cloth and high moisture content of the problem, we need to start from the sludge properties, filter cloth selection, operation specifications, the use of conditioning agents and filtration process optimization and other aspects, comprehensive policies to achieve the purpose of improving filtration efficiency and reducing moisture content.