For the problems of mud cake not forming and slow feeding, it is really critical to choose the right sludge conditioner. The following is a detailed analysis and solution to these two problems:
A, the causes of the mud cake molding and solutions
Cause analysis
Low sludge concentration: the sludge concentration value is too low, the proportion of solid content is less than 1%, which will lead to the sludge dehydration effect is not ideal, and the mud cake is difficult to form.
Filter cloth problem: aging, damage or blockage of filter cloth will affect the filtration effect of sludge, resulting in the mud cake is not formed.
Improper selection of agents: the filter press is very dependent on flocculants, if the dosage is insufficient or excessive, or the type of agent is not suitable for the nature of the sludge, it will lead to the rapid solid-liquid separation of the sludge, thus affecting the formation of mud cake.
Solution
Increase the sludge concentration: by adjusting the sludge treatment process, improve the solid content of the sludge, so that the sludge is easier to dehydrate and form mud cake.
Check and replace the filter cloth: check the status of the filter cloth regularly, replace the aging and damaged filter cloth in time, and clean the blocked filter cloth to ensure its filtering effect.
Select the right agent: according to the nature of the sludge and treatment requirements, choose the right sludge conditioner. For organic chemical sludge, cationic polyacrylamide can be selected; For inorganic sludge, anionic polyacrylamide or polyaluminum chloride can be selected. At the same time, pay attention to the dosage of the agent to avoid excessive or insufficient.
Two, slow feed reasons and solutions
Cause analysis
Insufficient feed: The solids content in the mud is low, resulting in insufficient feed, which affects the feed rate.
Equipment problem: The feed system of the filter press fails, such as the feed cylinder valve is blocked, the magnetic pump is blocked, etc., which will lead to slow feed.
Agent effect: If the agent is not selected properly or the amount is too much, it will cause the sludge viscosity to increase, block the feed pipe, and thus affect the feed speed.
Solution
Ensure continuous feed: Adjust the feed ratio, increase the solid content of the mud, and ensure that the filter press has enough material for filtration.
Check and repair equipment: regularly check the feed system of the filter press, clean up blocked parts, such as feed cylinder valves, magnetic pumps, etc., to ensure its normal operation.
Optimize the use of agents: according to the nature of sludge and treatment requirements, select the appropriate type and dosage of agents. Avoid excessive use of agents to increase sludge viscosity, thus affecting the feed speed.
In summary, in view of the problems of unformed mud cake and slow feeding, it is necessary to comprehensively consider and solve the problems from many aspects such as sludge concentration, filter cloth status, agent selection and equipment status. The efficiency and quality of sludge treatment can be effectively improved through reasonable process adjustment, equipment maintenance and pharmaceutical use.