In view of the problem of "runny" and high moisture content in the paper mill press mud, it can be solved from the following aspects:
1. Optimization of sludge conditioning
Use of sludge conditioner:
Select the appropriate conditioner: paper sludge conditioner, especially organic flocculating polymer sludge conditioner, can effectively improve the dewatering performance of sludge. These conditioners can form large flocculates, which cause the sludge to produce more water during the filtration process, thereby reducing the water content of the mud cake.
Dosage and proportion: according to the nature of sludge and treatment needs, reasonable control of the dosage of sludge conditioner. For example, the combination of inorganic flocculants (such as polyaluminum chloride, ferrous sulfate) and organic flocculants (such as polyacrylamide) can achieve the best dehydration effect by adjusting the dosage ratio.
Improve sludge properties:
By adding a new type of sludge conditioner or solidified clay, lime, etc., the surface structure of the sludge and the internal water distribution form are changed, and the content of bound water and adsorbed water of the sludge is reduced, so as to improve the dehydration efficiency.
Two, adjust the dewatering equipment parameters
Optimize equipment selection:
According to the nature of paper sludge and treatment needs to choose the appropriate dewatering equipment, such as plate and frame filter press, centrifugal dehydrator, etc. These devices can achieve high dehydration efficiency under appropriate operating conditions.
Adjust working parameters:
Adjust the working pressure and dewatering time of the dewatering equipment according to the actual situation. Increasing the pressure or extending the dehydration time can further reduce the moisture content of the mud cake, but pay attention to avoid excessive dehydration to avoid damage to the equipment.
3. Keep the equipment in good running condition
Regular inspection and maintenance:
Check and maintain the dewatering equipment regularly to ensure that the equipment is in good running condition. Timely replacement of worn parts, cleaning clogged filter cloth, etc., to ensure the efficient operation of the equipment.
Reduce failure rate:
Reduce the occurrence of equipment failure through preventive maintenance and timely repair to avoid poor dehydration or increased downtime due to equipment failure.
Four, try a new dehydration technology
Ultra-high pressure dehydration:
The use of ultra-high pressure dehydration technology can further improve the dewatering effect of sludge. This technique allows the water in the sludge to be released more fully by applying higher pressure.
Electrodialysis dehydration:
Electrodialysis dehydration technology uses the electric field to separate the water in the sludge through the membrane, which has the advantages of good dehydration effect and low energy consumption. However, it should be noted that this technology has high requirements for equipment and high cost, and it is necessary to choose whether to use it according to the actual situation.
Five, comprehensive treatment
Source control:
Strengthen the management and control of paper production process, and reduce the amount of sludge and water content generated in the production process. For example, optimize the production process and improve the utilization rate of raw materials.
Resource utilization:
Resource utilization of the dehydrated sludge, such as processing into organic fertilizer, brick making, etc. This can not only reduce the cost of sludge treatment, but also achieve waste recycling and resource saving.
In summary, to solve the problem of "runny" and high moisture content of paper mill mud, it is necessary to start from many aspects such as sludge conditioning, dewatering equipment selection, equipment operation status maintenance, new dehydration technology attempt and comprehensive treatment. Through comprehensive policies, efficient dewatering and resource utilization of sludge can be realized.