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Detailed explanation of laminated sludge dewatering machine
- 2018-11-05-

LaminatedSludge dewatering machine, There are some differences from the conventional belt machines, centrifuges, and frame machines on the market. Its working principle is very simple. The main body of the dehydrator is composed of a swimming ring, a fixed ring, and a screw shaft (all made of 304H stainless steel). , Some are made of 304 special material). There is a floating ring in the middle of the two fixed rings. The spiral shaft runs through them. The floating ring forms a movable gap with the fixed ring during the rotation, and the sludge passes through In the main body of the dehydrator, the filtrate is discharged from the filter slot between the fixed ring and the swimming ring under the action of gravity, and enters the filtrate tank. The flocculation solids advance uninterruptedly with the slow rotation of the screw shaft, and it drives the swimming pool while conveying. The moving ring makes up, down, left, and right cutting motions to clean the filter slits (such as movable filter cloth) without clogging until the gap (adjustable) formed by the end of the dewatering machine and the back pressure plate is squeezed into a mud cake (the moisture content is 75-83) %, the recovery rate of solids after dehydration is about 95%), which is discharged from the sludge outlet. Because the screw shaft rotates at a low speed (rotational speed is 3-5 rpm), it will not produce large vibrations, no noise, and the equipment can also have a low concentration (if the mud concentration is greater than 0.2%, that is: 2000mg/L), direct dehydration is not required Concentration tank (greatly saves the cost of early land and civil construction, and also saves the investment in the equipment in the concentration tank), so there is no pungent odor, but it is best to ensure a uniform concentration of mud. There is an automatic spray device at the top of the body, which can be set 4 times per hour, 10-15 seconds each time. The water consumption is calculated in liters per hour. The main purpose is to keep the equipment clean and beautiful, rather than other machines. Calculated by how many tons of flushing water increase the secondary pollution. There are baffles on both sides of the body to prevent water splashes during operation and keep the ground dry and tidy.

The operation process of our equipment: the sludge pump (as long as the ordinary submersible pump does not require a screw pump, and some design institutes will design it as a self-flowing state according to the terrain drop of the machine room and the inlet water) to pump the sludge into the metering tank, and measure There is a return pipe in the tank, too much muddy water will automatically return to the sludge tank, and then the muddy water will flow to the flocculation mixing tank by itself, and the polymer flocculant (polyacrylamide=PAM) diluted 1000 times (0.1%) is added at the same time, note: Some sewage needs to add poly-iron or poly-aluminum=PAC to the mud inlet pipeline, so there are not many users), the muddy water is fully flocculated by the stirring motor to drive the stirring blade to form an ideal alum (the generally formed alum is equivalent to the size of a rice grain For the best), the flocculated muddy water also flows to the main body of the dewatering machine by itself. When passing through the thickening section, most of the filtrate is discharged from the filter slot. The screw shaft transports the remaining sludge forward to the end of the machine and squeezes it on the back pressure plate. Under the action of the sludge cake, all the dehydration processes can be fully automated by the electric control cabinet, and can also be linked with the drug bubbler, the sludge conveyor, and the sludge pump to achieve continuous operation for 24 hours.

Our machine has a self-cleaning function, and the amount of flushing water is very small, and it does not block. Like a belt machine, it is easier to block, and the filter cloth replacement is also more troublesome. At the same time, a large amount of water is needed for flushing, which increases the internal circulation. Sub-pollution. One of the biggest drawbacks of centrifuges is that under high-speed rotation, the power consumption must be relatively large, the vibration is severe, the noise is also large, and the requirements for the foundation are also very high. Our machines are relatively small and occupy a small area (reduced Land investment cost), there is no big vibration, so the requirements for the foundation are relatively low, the screw shaft is 3-5 revolutions per minute, and the power consumption is very small. However, the frame machine cannot be used continuously. After a period of use, it must be disassembled for washing. It is not suitable for oily sludge, and the moisture content of the mud cake is uneven, and the outside is dry and the center is wet. Our machine has a relatively high degree of automation. Equipped with a fully automatic infusion machine and a screw conveyor, 24-hour unmanned operation can be realized, and it can be directly dehydrated at a low concentration.

In terms of model selection, we select the model based on the absolutely dry sludge. The DS is a sludge cake that does not contain any moisture. The DS processed per unit time can be calculated by the sludge flow × sludge concentration. the amount. The first number of the device model represents the diameter of the device body, and the last number represents the number of groups of the body, such as ZC302, that is, the body with a diameter of 300 has 2 groups.

Summary: Compared with belt type, centrifugal and plate frame, our laminated dewatering machine has great advantages in operating cost saving and automatic management. It truly saves energy and reduces consumption, and not only solves the environmental protection of many manufacturers' dehydration rooms The problem also solved their production problems and greatly improved the working environment of on-site employees.