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How to adjust the high water content of the stacked screw sludge dewatering machine
- 2020-09-28-

How to adjust the high water content of the stacked screw sludge dewatering machine


The shaftless screw conveyor is driven by the motor to drive the cycloid reducer, and the screw body is rotated by the transmission of the mechanical seal shaft and the coupling disc on the shaftless spiral body. The spiral body is supported at only one end, and the structure is simple. In use, the sludge is like a nut, while the shaftless spiral body is like a rolling screw, which can be rotated one after another to move the sludge from one end to the other. The U-shaped groove, cover plate and other parts of the shaftless screw conveyor are made of 16Mn steel. The material of the U-shaped groove maintenance bushing is nylon 66. In addition, the spiral body rotates at a low speed (29r/min), so the wear is small and the service life is long. . Because the upper part of the U-shaped groove is equipped with a cover plate, the transportation process is basically sealed, which can effectively reduce indoor odor.


Compared with the shaft screw conveyor of the same outer diameter, the shaftless screw body component is only 1/2 of that, and the operating power consumption is low. Because there is no central axis, in addition to transporting sludge with high viscosity, it is also suitable for transporting materials such as fiber materials and wires without encircling or blocking.


Since the shaftless screw conveyor device was put into use, there has been no throwing or leakage during the sludge transportation process. The appearance of the site has been renewed, and the operating environment has been greatly improved, coupled with low operating noise. The spiral body and the U-shaped groove maintenance bushing have not been found to be significantly worn, and there is no need for repair at all.


Water resources are indispensable natural resources for human production and life, as well as environmental resources for living creatures. With the aggravation of water resources crisis and the deterioration of water environment quality, the lack of water resources has become one of the most important resource and environmental problems in the world. Due to the pressure brought by water pollution and water scarcity, the spiral sludge dewatering machine, as a technological science that has been rapidly developed in the field of environmental engineering, has been rapidly developed in recent decades.


The stacked screw sludge dewatering machine can be widely used in municipal sewage treatment projects and water treatment systems in petrochemical, light industry, chemical fiber, paper, pharmaceutical, leather and other industrial occupations. The sludge in the sludge pool of the sludge dewatering machine is transported to the metering tank through the sludge transfer pump, and the amount of sludge is fed through the liquid level adjustment tube in the metering tank, and the remaining sludge is returned to the sludge tank through the return pipe.


The sludge and flocculant are mixed thoroughly in the flocculation mixing tank through a mixer to form alum. The diameter of the alum is about 5mm. The alum flower is concentrated by gravity in the concentration section, and a lot of filtrate is discharged from the filter slot of the concentration section. The concentrated sludge is continuously pushed forward along the rotating direction of the screw shaft, and is fully dehydrated under the effect of the internal pressure formed by the back pressure plate.


The dehydrated mud cake is discharged from the open space formed by the back pressure plate and the spiral body. The sludge treatment capacity and the moisture content of the mud cake can be passed through the rolling speed of the screw shaft and the open space of the back pressure plate. The sewage pipe of the flocculation mixing tank is only used when cleaning the mixing tank.


The main body of the stacked screw sludge dewatering machine is composed of multiple fixed rings and floating rings, and the spiral shaft penetrates the filtering equipment formed between them. The front section is the thickening section, and the rear section is the dewatering section. The sludge thickening and squeezing and dewatering operations are completed in one cylinder, replacing the traditional filter cloth and centrifugal filtration methods with a wonderful filter body.


After the sludge is concentrated by gravity in the thickening section, it is transported to the dewatering section. During the process of traveling, the filter gap and the pitch of the sludge gradually become smaller, and under the blocking action of the back pressure plate, the internal pressure and the volume are continuously reduced to reach a sufficient amount. Dehydration intent.


If there is no mixing, the sludge will inevitably be stratified, resulting in an unstable concentration of the sludge entering the sludge dewatering machine. Since the increase of flocculant is set according to a certain proportion during the commissioning time, therefore, sometimes, If the sludge concentration is too low, the flocculant will be destroyed, and if the sludge concentration is too high, it will not flocculate well, which will affect the effect of the flocculant.


The stacking screw sludge dewatering machine adopts automatic control from the extraction of sludge, the injection of liquid medicine, and the discharge of the sludge cake. Through the electric control cabinet, it is linked with the medicine bubble machine, the mud pump, the dosing pump, etc., without the need for personnel to operate equipment , The operation will not cause blockage, filter belt deviation or other phenomena that affect the process. The daily maintenance and protection are simple, and it can be operated continuously for 24 hours. Complete automatic operation of sludge dewatering in a true sense at one time.


If you want to know the production and usage of the stacked screw sludge dewatering machine, you must know how to use it, and the work flow explained to everyone above. First, we need to output the sludge stock solution to the sludge tank in the stacked screw solid-liquid separator, inject the agent into the sludge tank, and mix it with the sludge sufficiently by the agitator.