The reasons for the thin mud output of the plate and frame filter press may involve many aspects, including the nature of the sludge, the state of the equipment, the operating parameters and the use of chemicals. The following is a detailed analysis of these reasons and the corresponding solutions:

Causes and solutions

Changes in sludge properties

Reason: The change of the properties of sludge such as acid and alkali and organic matter content may lead to the deterioration of its dewatering performance.

Solution: The raw mud was detected, and the type and dosage of sludge conditioner were adjusted according to the change of sludge properties to improve the dewatering performance of sludge.

Improper use of medicine

Reason: insufficient amount of sludge conditioner or uneven mixing, resulting in poor sludge conditioning effect; Or the addition of too much agent, resulting in increased sludge viscosity, easy to cause clogging of filter cloth.

Solution: According to the nature of the sludge and the site changes, the sludge conditioner is reasonably selected, and added in strict accordance with the specified proportion and stirring time to ensure that the agent and the sludge are fully mixed.

Equipment problem

Filter cloth clogging: filter cloth cleaning is not clean or long time use leads to clogging, affecting the filtering effect.

Solution: Clean the filter cloth regularly to maintain its good filtering performance; If the filter cloth is seriously damaged, it should be replaced in time.

Insufficient feed pressure: feed pump failure or feed pump failure, resulting in insufficient feed pressure, slow dehydration.

Solution: Check and repair the feed pump or feed pump to ensure its normal operation; Adjust the feeding pressure to the appropriate range.

Filter plate channel obstruction: A large amount of sludge or impurities accumulate in the filter plate channel, resulting in channel obstruction.

Solution: Clean the filter plate channel regularly to keep it unimpeded.

Improper operating parameters

Insufficient feeding pressure: Insufficient feeding pressure may cause the sludge to not be sufficiently squeezed, thus affecting the dehydration effect.

Solution: Increase the feeding pressure to ensure that the sludge is sufficiently squeezed during the filtration process.

Insufficient filtration time: Too short filtration time may lead to insufficient dehydration of the sludge.

Solution: Extend the filtration time appropriately to ensure that the sludge is fully dehydrated.

Other factors

Upstream process changes: changes in upstream process may lead to changes in sludge properties, which in turn affect the dehydration effect.

Solution: Maintain communication with the upstream process department, understand the changes in sludge properties, and adjust the sludge conditioner and operating parameters accordingly.

Temperature, pH and other external factors: changes in these factors may also affect the dewatering performance of the sludge. Solution: According to the changes of external factors, the type and dosage of sludge conditioner are appropriately adjusted, as well as the operating parameters.

Comprehensive measures

In order to effectively solve the problem of thin mud from the plate and frame filter press, the following comprehensive measures can be taken:

Perform regular maintenance and maintenance on the equipment to ensure that the equipment is in good condition.

Strengthen the monitoring and analysis of sludge properties, and adjust the sludge conditioner and operating parameters in time according to the changes in sludge properties.

Strengthen the training and management of operators to improve their operational skills and ability to deal with problems.

In summary, the reasons for the thin mud from the plate and frame filter press may involve many aspects, which need to be comprehensively considered and corresponding measures taken to solve. By strengthening equipment maintenance, sludge property monitoring, operating parameter adjustment and operator training, the dewatering effect and processing capacity of the plate and frame filter press can be effectively improved.